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 <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  41         .name = "nl80211",      /* have users key off the name instead */
  42         .hdrsize = 0,           /* no private header */
  43         .version = 1,           /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         assert_cfg80211_lock();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 mutex_lock(&rdev->devlist_mtx);
  84                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  85                         if (have_ifidx && wdev->netdev &&
  86                             wdev->netdev->ifindex == ifidx) {
  87                                 result = wdev;
  88                                 break;
  89                         }
  90                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  91                                 result = wdev;
  92                                 break;
  93                         }
  94                 }
  95                 mutex_unlock(&rdev->devlist_mtx);
  96
  97                 if (result)
  98                         break;
  99         }
 100
 101         if (result)
 102                 return result;
 103         return ERR_PTR(-ENODEV);
 104 }
 105
 106 static struct cfg80211_registered_device *
 107 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 108 {
 109         struct cfg80211_registered_device *rdev = NULL, *tmp;
 110         struct net_device *netdev;
 111
 112         assert_cfg80211_lock();
 113
 114         if (!attrs[NL80211_ATTR_WIPHY] &&
 115             !attrs[NL80211_ATTR_IFINDEX] &&
 116             !attrs[NL80211_ATTR_WDEV])
 117                 return ERR_PTR(-EINVAL);
 118
 119         if (attrs[NL80211_ATTR_WIPHY])
 120                 rdev = cfg80211_rdev_by_wiphy_idx(
 121                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 122
 123         if (attrs[NL80211_ATTR_WDEV]) {
 124                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 125                 struct wireless_dev *wdev;
 126                 bool found = false;
 127
 128                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 129                 if (tmp) {
 130                         /* make sure wdev exists */
 131                         mutex_lock(&tmp->devlist_mtx);
 132                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 133                                 if (wdev->identifier != (u32)wdev_id)
 134                                         continue;
 135                                 found = true;
 136                                 break;
 137                         }
 138                         mutex_unlock(&tmp->devlist_mtx);
 139
 140                         if (!found)
 141                                 tmp = NULL;
 142
 143                         if (rdev && tmp != rdev)
 144                                 return ERR_PTR(-EINVAL);
 145                         rdev = tmp;
 146                 }
 147         }
 148
 149         if (attrs[NL80211_ATTR_IFINDEX]) {
 150                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 151                 netdev = dev_get_by_index(netns, ifindex);
 152                 if (netdev) {
 153                         if (netdev->ieee80211_ptr)
 154                                 tmp = wiphy_to_dev(
 155                                                 netdev->ieee80211_ptr->wiphy);
 156                         else
 157                                 tmp = NULL;
 158
 159                         dev_put(netdev);
 160
 161                         /* not wireless device -- return error */
 162                         if (!tmp)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         /* mismatch -- return error */
 166                         if (rdev && tmp != rdev)
 167                                 return ERR_PTR(-EINVAL);
 168
 169                         rdev = tmp;
 170                 }
 171         }
 172
 173         if (!rdev)
 174                 return ERR_PTR(-ENODEV);
 175
 176         if (netns != wiphy_net(&rdev->wiphy))
 177                 return ERR_PTR(-ENODEV);
 178
 179         return rdev;
 180 }
 181
 182 /*
 183  * This function returns a pointer to the driver
 184  * that the genl_info item that is passed refers to.
 185  * If successful, it returns non-NULL and also locks
 186  * the driver's mutex!
 187  *
 188  * This means that you need to call cfg80211_unlock_rdev()
 189  * before being allowed to acquire &cfg80211_mutex!
 190  *
 191  * This is necessary because we need to lock the global
 192  * mutex to get an item off the list safely, and then
 193  * we lock the rdev mutex so it doesn't go away under us.
 194  *
 195  * We don't want to keep cfg80211_mutex locked
 196  * for all the time in order to allow requests on
 197  * other interfaces to go through at the same time.
 198  *
 199  * The result of this can be a PTR_ERR and hence must
 200  * be checked with IS_ERR() for errors.
 201  */
 202 static struct cfg80211_registered_device *
 203 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 204 {
 205         struct cfg80211_registered_device *rdev;
 206
 207         mutex_lock(&cfg80211_mutex);
 208         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 209
 210         /* if it is not an error we grab the lock on
 211          * it to assure it won't be going away while
 212          * we operate on it */
 213         if (!IS_ERR(rdev))
 214                 mutex_lock(&rdev->mtx);
 215
 216         mutex_unlock(&cfg80211_mutex);
 217
 218         return rdev;
 219 }
 220
 221 /* policy for the attributes */
 222 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 223         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 224         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 225                                       .len = 20-1 },
 226         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 227
 228         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 232         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 233
 234         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 236         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 238         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 239
 240         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 242         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 243
 244         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 245         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 246
 247         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 248         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 249                                     .len = WLAN_MAX_KEY_LEN },
 250         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 251         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 252         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 253         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 254         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 255
 256         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 257         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 258         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 259                                        .len = IEEE80211_MAX_DATA_LEN },
 260         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 261                                        .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 263         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 264         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 265         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 266                                                .len = NL80211_MAX_SUPP_RATES },
 267         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 268         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 269         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 270         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 271                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 272         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 273
 274         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 275         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 276
 277         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 280         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 281                                            .len = NL80211_MAX_SUPP_RATES },
 282         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 283
 284         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 286
 287         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 288
 289         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 290         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 291                               .len = IEEE80211_MAX_DATA_LEN },
 292         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 293         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 294
 295         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 296                                 .len = IEEE80211_MAX_SSID_LEN },
 297         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 298         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_STA_FLAGS2] = {
 303                 .len = sizeof(struct nl80211_sta_flag_update),
 304         },
 305         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 306         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 307         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 309         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 310         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 311         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 312         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 313         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 314                                  .len = WLAN_PMKID_LEN },
 315         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 316         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 317         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 319                                  .len = IEEE80211_MAX_DATA_LEN },
 320         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 321         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 323         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 326         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 327         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 330         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 331         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 335         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 336         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 339         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 340                                          .len = IEEE80211_MAX_DATA_LEN },
 341         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 342                                          .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 345         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 352         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 353                                       .len = IEEE80211_MAX_DATA_LEN },
 354         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 355         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 356         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 357                 .len = NL80211_HT_CAPABILITY_LEN
 358         },
 359         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 360         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 361         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 362         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 363         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 364         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 365         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 366         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 367         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 368         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 369         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 370         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 371         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 372         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 373         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 374         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 375         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 376                 .len = NL80211_VHT_CAPABILITY_LEN,
 377         },
 378         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 379         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 380                                   .len = IEEE80211_MAX_DATA_LEN },
 381 };
 382
 383 /* policy for the key attributes */
 384 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 385         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 386         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 387         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 388         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 389         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 390         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 391         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 392         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 393 };
 394
 395 /* policy for the key default flags */
 396 static const struct nla_policy
 397 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 398         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 399         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 400 };
 401
 402 /* policy for WoWLAN attributes */
 403 static const struct nla_policy
 404 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 405         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 406         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 407         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 408         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 409         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 410         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 411         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 412         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 413         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 414 };
 415
 416 static const struct nla_policy
 417 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 418         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 419         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 420         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 421         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 422         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 423         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 424         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 425                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 426         },
 427         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 428                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 429         },
 430         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 431         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 432         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 433 };
 434
 435 /* policy for GTK rekey offload attributes */
 436 static const struct nla_policy
 437 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 438         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 439         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 440         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 441 };
 442
 443 static const struct nla_policy
 444 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 445         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 446                                                  .len = IEEE80211_MAX_SSID_LEN },
 447         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 448 };
 449
 450 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 451                                      struct netlink_callback *cb,
 452                                      struct cfg80211_registered_device **rdev,
 453                                      struct wireless_dev **wdev)
 454 {
 455         int err;
 456
 457         rtnl_lock();
 458         mutex_lock(&cfg80211_mutex);
 459
 460         if (!cb->args[0]) {
 461                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 462                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 463                                   nl80211_policy);
 464                 if (err)
 465                         goto out_unlock;
 466
 467                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 468                                                    nl80211_fam.attrbuf);
 469                 if (IS_ERR(*wdev)) {
 470                         err = PTR_ERR(*wdev);
 471                         goto out_unlock;
 472                 }
 473                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 474                 cb->args[0] = (*rdev)->wiphy_idx;
 475                 cb->args[1] = (*wdev)->identifier;
 476         } else {
 477                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0]);
 478                 struct wireless_dev *tmp;
 479
 480                 if (!wiphy) {
 481                         err = -ENODEV;
 482                         goto out_unlock;
 483                 }
 484                 *rdev = wiphy_to_dev(wiphy);
 485                 *wdev = NULL;
 486
 487                 mutex_lock(&(*rdev)->devlist_mtx);
 488                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 489                         if (tmp->identifier == cb->args[1]) {
 490                                 *wdev = tmp;
 491                                 break;
 492                         }
 493                 }
 494                 mutex_unlock(&(*rdev)->devlist_mtx);
 495
 496                 if (!*wdev) {
 497                         err = -ENODEV;
 498                         goto out_unlock;
 499                 }
 500         }
 501
 502         cfg80211_lock_rdev(*rdev);
 503
 504         mutex_unlock(&cfg80211_mutex);
 505         return 0;
 506  out_unlock:
 507         mutex_unlock(&cfg80211_mutex);
 508         rtnl_unlock();
 509         return err;
 510 }
 511
 512 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 513 {
 514         cfg80211_unlock_rdev(rdev);
 515         rtnl_unlock();
 516 }
 517
 518 /* IE validation */
 519 static bool is_valid_ie_attr(const struct nlattr *attr)
 520 {
 521         const u8 *pos;
 522         int len;
 523
 524         if (!attr)
 525                 return true;
 526
 527         pos = nla_data(attr);
 528         len = nla_len(attr);
 529
 530         while (len) {
 531                 u8 elemlen;
 532
 533                 if (len < 2)
 534                         return false;
 535                 len -= 2;
 536
 537                 elemlen = pos[1];
 538                 if (elemlen > len)
 539                         return false;
 540
 541                 len -= elemlen;
 542                 pos += 2 + elemlen;
 543         }
 544
 545         return true;
 546 }
 547
 548 /* message building helper */
 549 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 550                                    int flags, u8 cmd)
 551 {
 552         /* since there is no private header just add the generic one */
 553         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 554 }
 555
 556 static int nl80211_msg_put_channel(struct sk_buff *msg,
 557                                    struct ieee80211_channel *chan,
 558                                    bool large)
 559 {
 560         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 561                         chan->center_freq))
 562                 goto nla_put_failure;
 563
 564         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 565             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 566                 goto nla_put_failure;
 567         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 568             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 569                 goto nla_put_failure;
 570         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 571             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 572                 goto nla_put_failure;
 573         if (chan->flags & IEEE80211_CHAN_RADAR) {
 574                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 575                         goto nla_put_failure;
 576                 if (large) {
 577                         u32 time;
 578
 579                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 580
 581                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 582                                         chan->dfs_state))
 583                                 goto nla_put_failure;
 584                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 585                                         time))
 586                                 goto nla_put_failure;
 587                 }
 588         }
 589
 590         if (large) {
 591                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 592                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 593                         goto nla_put_failure;
 594                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 595                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 596                         goto nla_put_failure;
 597                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 598                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 599                         goto nla_put_failure;
 600                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 601                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 602                         goto nla_put_failure;
 603         }
 604
 605         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 606                         DBM_TO_MBM(chan->max_power)))
 607                 goto nla_put_failure;
 608
 609         return 0;
 610
 611  nla_put_failure:
 612         return -ENOBUFS;
 613 }
 614
 615 /* netlink command implementations */
 616
 617 struct key_parse {
 618         struct key_params p;
 619         int idx;
 620         int type;
 621         bool def, defmgmt;
 622         bool def_uni, def_multi;
 623 };
 624
 625 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 626 {
 627         struct nlattr *tb[NL80211_KEY_MAX + 1];
 628         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 629                                    nl80211_key_policy);
 630         if (err)
 631                 return err;
 632
 633         k->def = !!tb[NL80211_KEY_DEFAULT];
 634         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 635
 636         if (k->def) {
 637                 k->def_uni = true;
 638                 k->def_multi = true;
 639         }
 640         if (k->defmgmt)
 641                 k->def_multi = true;
 642
 643         if (tb[NL80211_KEY_IDX])
 644                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 645
 646         if (tb[NL80211_KEY_DATA]) {
 647                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 648                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 649         }
 650
 651         if (tb[NL80211_KEY_SEQ]) {
 652                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 653                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 654         }
 655
 656         if (tb[NL80211_KEY_CIPHER])
 657                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 658
 659         if (tb[NL80211_KEY_TYPE]) {
 660                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 661                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 662                         return -EINVAL;
 663         }
 664
 665         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 666                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 667                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 668                                        tb[NL80211_KEY_DEFAULT_TYPES],
 669                                        nl80211_key_default_policy);
 670                 if (err)
 671                         return err;
 672
 673                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 674                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 675         }
 676
 677         return 0;
 678 }
 679
 680 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 681 {
 682         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 683                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 684                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 685         }
 686
 687         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 688                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 689                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 690         }
 691
 692         if (info->attrs[NL80211_ATTR_KEY_IDX])
 693                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 694
 695         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 696                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 697
 698         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 699         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 700
 701         if (k->def) {
 702                 k->def_uni = true;
 703                 k->def_multi = true;
 704         }
 705         if (k->defmgmt)
 706                 k->def_multi = true;
 707
 708         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 709                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 710                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 711                         return -EINVAL;
 712         }
 713
 714         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 715                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 716                 int err = nla_parse_nested(
 717                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 718                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 719                                 nl80211_key_default_policy);
 720                 if (err)
 721                         return err;
 722
 723                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 724                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 725         }
 726
 727         return 0;
 728 }
 729
 730 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 731 {
 732         int err;
 733
 734         memset(k, 0, sizeof(*k));
 735         k->idx = -1;
 736         k->type = -1;
 737
 738         if (info->attrs[NL80211_ATTR_KEY])
 739                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 740         else
 741                 err = nl80211_parse_key_old(info, k);
 742
 743         if (err)
 744                 return err;
 745
 746         if (k->def && k->defmgmt)
 747                 return -EINVAL;
 748
 749         if (k->defmgmt) {
 750                 if (k->def_uni || !k->def_multi)
 751                         return -EINVAL;
 752         }
 753
 754         if (k->idx != -1) {
 755                 if (k->defmgmt) {
 756                         if (k->idx < 4 || k->idx > 5)
 757                                 return -EINVAL;
 758                 } else if (k->def) {
 759                         if (k->idx < 0 || k->idx > 3)
 760                                 return -EINVAL;
 761                 } else {
 762                         if (k->idx < 0 || k->idx > 5)
 763                                 return -EINVAL;
 764                 }
 765         }
 766
 767         return 0;
 768 }
 769
 770 static struct cfg80211_cached_keys *
 771 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 772                        struct nlattr *keys, bool *no_ht)
 773 {
 774         struct key_parse parse;
 775         struct nlattr *key;
 776         struct cfg80211_cached_keys *result;
 777         int rem, err, def = 0;
 778
 779         result = kzalloc(sizeof(*result), GFP_KERNEL);
 780         if (!result)
 781                 return ERR_PTR(-ENOMEM);
 782
 783         result->def = -1;
 784         result->defmgmt = -1;
 785
 786         nla_for_each_nested(key, keys, rem) {
 787                 memset(&parse, 0, sizeof(parse));
 788                 parse.idx = -1;
 789
 790                 err = nl80211_parse_key_new(key, &parse);
 791                 if (err)
 792                         goto error;
 793                 err = -EINVAL;
 794                 if (!parse.p.key)
 795                         goto error;
 796                 if (parse.idx < 0 || parse.idx > 4)
 797                         goto error;
 798                 if (parse.def) {
 799                         if (def)
 800                                 goto error;
 801                         def = 1;
 802                         result->def = parse.idx;
 803                         if (!parse.def_uni || !parse.def_multi)
 804                                 goto error;
 805                 } else if (parse.defmgmt)
 806                         goto error;
 807                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 808                                                      parse.idx, false, NULL);
 809                 if (err)
 810                         goto error;
 811                 result->params[parse.idx].cipher = parse.p.cipher;
 812                 result->params[parse.idx].key_len = parse.p.key_len;
 813                 result->params[parse.idx].key = result->data[parse.idx];
 814                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 815
 816                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 817                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 818                         if (no_ht)
 819                                 *no_ht = true;
 820                 }
 821         }
 822
 823         return result;
 824  error:
 825         kfree(result);
 826         return ERR_PTR(err);
 827 }
 828
 829 static int nl80211_key_allowed(struct wireless_dev *wdev)
 830 {
 831         ASSERT_WDEV_LOCK(wdev);
 832
 833         switch (wdev->iftype) {
 834         case NL80211_IFTYPE_AP:
 835         case NL80211_IFTYPE_AP_VLAN:
 836         case NL80211_IFTYPE_P2P_GO:
 837         case NL80211_IFTYPE_MESH_POINT:
 838                 break;
 839         case NL80211_IFTYPE_ADHOC:
 840                 if (!wdev->current_bss)
 841                         return -ENOLINK;
 842                 break;
 843         case NL80211_IFTYPE_STATION:
 844         case NL80211_IFTYPE_P2P_CLIENT:
 845                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 846                         return -ENOLINK;
 847                 break;
 848         default:
 849                 return -EINVAL;
 850         }
 851
 852         return 0;
 853 }
 854
 855 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 856 {
 857         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 858         int i;
 859
 860         if (!nl_modes)
 861                 goto nla_put_failure;
 862
 863         i = 0;
 864         while (ifmodes) {
 865                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 866                         goto nla_put_failure;
 867                 ifmodes >>= 1;
 868                 i++;
 869         }
 870
 871         nla_nest_end(msg, nl_modes);
 872         return 0;
 873
 874 nla_put_failure:
 875         return -ENOBUFS;
 876 }
 877
 878 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 879                                           struct sk_buff *msg,
 880                                           bool large)
 881 {
 882         struct nlattr *nl_combis;
 883         int i, j;
 884
 885         nl_combis = nla_nest_start(msg,
 886                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 887         if (!nl_combis)
 888                 goto nla_put_failure;
 889
 890         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 891                 const struct ieee80211_iface_combination *c;
 892                 struct nlattr *nl_combi, *nl_limits;
 893
 894                 c = &wiphy->iface_combinations[i];
 895
 896                 nl_combi = nla_nest_start(msg, i + 1);
 897                 if (!nl_combi)
 898                         goto nla_put_failure;
 899
 900                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 901                 if (!nl_limits)
 902                         goto nla_put_failure;
 903
 904                 for (j = 0; j < c->n_limits; j++) {
 905                         struct nlattr *nl_limit;
 906
 907                         nl_limit = nla_nest_start(msg, j + 1);
 908                         if (!nl_limit)
 909                                 goto nla_put_failure;
 910                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 911                                         c->limits[j].max))
 912                                 goto nla_put_failure;
 913                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 914                                                 c->limits[j].types))
 915                                 goto nla_put_failure;
 916                         nla_nest_end(msg, nl_limit);
 917                 }
 918
 919                 nla_nest_end(msg, nl_limits);
 920
 921                 if (c->beacon_int_infra_match &&
 922                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 923                         goto nla_put_failure;
 924                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 925                                 c->num_different_channels) ||
 926                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 927                                 c->max_interfaces))
 928                         goto nla_put_failure;
 929                 if (large &&
 930                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 931                                 c->radar_detect_widths))
 932                         goto nla_put_failure;
 933
 934                 nla_nest_end(msg, nl_combi);
 935         }
 936
 937         nla_nest_end(msg, nl_combis);
 938
 939         return 0;
 940 nla_put_failure:
 941         return -ENOBUFS;
 942 }
 943
 944 #ifdef CONFIG_PM
 945 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 946                                         struct sk_buff *msg)
 947 {
 948         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
 949         struct nlattr *nl_tcp;
 950
 951         if (!tcp)
 952                 return 0;
 953
 954         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 955         if (!nl_tcp)
 956                 return -ENOBUFS;
 957
 958         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 959                         tcp->data_payload_max))
 960                 return -ENOBUFS;
 961
 962         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 963                         tcp->data_payload_max))
 964                 return -ENOBUFS;
 965
 966         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 967                 return -ENOBUFS;
 968
 969         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 970                                 sizeof(*tcp->tok), tcp->tok))
 971                 return -ENOBUFS;
 972
 973         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 974                         tcp->data_interval_max))
 975                 return -ENOBUFS;
 976
 977         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 978                         tcp->wake_payload_max))
 979                 return -ENOBUFS;
 980
 981         nla_nest_end(msg, nl_tcp);
 982         return 0;
 983 }
 984
 985 static int nl80211_send_wowlan(struct sk_buff *msg,
 986                                struct cfg80211_registered_device *dev,
 987                                bool large)
 988 {
 989         struct nlattr *nl_wowlan;
 990
 991         if (!dev->wiphy.wowlan.flags && !dev->wiphy.wowlan.n_patterns)
 992                 return 0;
 993
 994         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 995         if (!nl_wowlan)
 996                 return -ENOBUFS;
 997
 998         if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
 999              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1000             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1001              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1002             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1003              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1004             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1005              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1006             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1007              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1008             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1009              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1010             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1011              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1012             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1013              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1014                 return -ENOBUFS;
1015
1016         if (dev->wiphy.wowlan.n_patterns) {
1017                 struct nl80211_wowlan_pattern_support pat = {
1018                         .max_patterns = dev->wiphy.wowlan.n_patterns,
1019                         .min_pattern_len = dev->wiphy.wowlan.pattern_min_len,
1020                         .max_pattern_len = dev->wiphy.wowlan.pattern_max_len,
1021                         .max_pkt_offset = dev->wiphy.wowlan.max_pkt_offset,
1022                 };
1023
1024                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1025                             sizeof(pat), &pat))
1026                         return -ENOBUFS;
1027         }
1028
1029         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1030                 return -ENOBUFS;
1031
1032         nla_nest_end(msg, nl_wowlan);
1033
1034         return 0;
1035 }
1036 #endif
1037
1038 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1039                                       struct ieee80211_supported_band *sband)
1040 {
1041         struct nlattr *nl_rates, *nl_rate;
1042         struct ieee80211_rate *rate;
1043         int i;
1044
1045         /* add HT info */
1046         if (sband->ht_cap.ht_supported &&
1047             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1048                      sizeof(sband->ht_cap.mcs),
1049                      &sband->ht_cap.mcs) ||
1050              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1051                          sband->ht_cap.cap) ||
1052              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1053                         sband->ht_cap.ampdu_factor) ||
1054              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1055                         sband->ht_cap.ampdu_density)))
1056                 return -ENOBUFS;
1057
1058         /* add VHT info */
1059         if (sband->vht_cap.vht_supported &&
1060             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1061                      sizeof(sband->vht_cap.vht_mcs),
1062                      &sband->vht_cap.vht_mcs) ||
1063              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1064                          sband->vht_cap.cap)))
1065                 return -ENOBUFS;
1066
1067         /* add bitrates */
1068         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1069         if (!nl_rates)
1070                 return -ENOBUFS;
1071
1072         for (i = 0; i < sband->n_bitrates; i++) {
1073                 nl_rate = nla_nest_start(msg, i);
1074                 if (!nl_rate)
1075                         return -ENOBUFS;
1076
1077                 rate = &sband->bitrates[i];
1078                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1079                                 rate->bitrate))
1080                         return -ENOBUFS;
1081                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1082                     nla_put_flag(msg,
1083                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1084                         return -ENOBUFS;
1085
1086                 nla_nest_end(msg, nl_rate);
1087         }
1088
1089         nla_nest_end(msg, nl_rates);
1090
1091         return 0;
1092 }
1093
1094 static int
1095 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1096                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1097 {
1098         u16 stypes;
1099         struct nlattr *nl_ftypes, *nl_ifs;
1100         enum nl80211_iftype ift;
1101         int i;
1102
1103         if (!mgmt_stypes)
1104                 return 0;
1105
1106         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1107         if (!nl_ifs)
1108                 return -ENOBUFS;
1109
1110         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1111                 nl_ftypes = nla_nest_start(msg, ift);
1112                 if (!nl_ftypes)
1113                         return -ENOBUFS;
1114                 i = 0;
1115                 stypes = mgmt_stypes[ift].tx;
1116                 while (stypes) {
1117                         if ((stypes & 1) &&
1118                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1119                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1120                                 return -ENOBUFS;
1121                         stypes >>= 1;
1122                         i++;
1123                 }
1124                 nla_nest_end(msg, nl_ftypes);
1125         }
1126
1127         nla_nest_end(msg, nl_ifs);
1128
1129         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1130         if (!nl_ifs)
1131                 return -ENOBUFS;
1132
1133         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1134                 nl_ftypes = nla_nest_start(msg, ift);
1135                 if (!nl_ftypes)
1136                         return -ENOBUFS;
1137                 i = 0;
1138                 stypes = mgmt_stypes[ift].rx;
1139                 while (stypes) {
1140                         if ((stypes & 1) &&
1141                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1142                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1143                                 return -ENOBUFS;
1144                         stypes >>= 1;
1145                         i++;
1146                 }
1147                 nla_nest_end(msg, nl_ftypes);
1148         }
1149         nla_nest_end(msg, nl_ifs);
1150
1151         return 0;
1152 }
1153
1154 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1155                               struct sk_buff *msg, u32 portid, u32 seq,
1156                               int flags, bool split, long *split_start,
1157                               long *band_start, long *chan_start)
1158 {
1159         void *hdr;
1160         struct nlattr *nl_bands, *nl_band;
1161         struct nlattr *nl_freqs, *nl_freq;
1162         struct nlattr *nl_cmds;
1163         enum ieee80211_band band;
1164         struct ieee80211_channel *chan;
1165         int i;
1166         const struct ieee80211_txrx_stypes *mgmt_stypes =
1167                                 dev->wiphy.mgmt_stypes;
1168         long start = 0, start_chan = 0, start_band = 0;
1169         u32 features;
1170
1171         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1172         if (!hdr)
1173                 return -ENOBUFS;
1174
1175         /* allow always using the variables */
1176         if (!split) {
1177                 split_start = &start;
1178                 band_start = &start_band;
1179                 chan_start = &start_chan;
1180         }
1181
1182         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1183             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1184                            wiphy_name(&dev->wiphy)) ||
1185             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1186                         cfg80211_rdev_list_generation))
1187                 goto nla_put_failure;
1188
1189         switch (*split_start) {
1190         case 0:
1191                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1192                                dev->wiphy.retry_short) ||
1193                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1194                                dev->wiphy.retry_long) ||
1195                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1196                                 dev->wiphy.frag_threshold) ||
1197                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1198                                 dev->wiphy.rts_threshold) ||
1199                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1200                                dev->wiphy.coverage_class) ||
1201                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1202                                dev->wiphy.max_scan_ssids) ||
1203                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1204                                dev->wiphy.max_sched_scan_ssids) ||
1205                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1206                                 dev->wiphy.max_scan_ie_len) ||
1207                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1208                                 dev->wiphy.max_sched_scan_ie_len) ||
1209                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1210                                dev->wiphy.max_match_sets))
1211                         goto nla_put_failure;
1212
1213                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1214                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1215                         goto nla_put_failure;
1216                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1217                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1218                         goto nla_put_failure;
1219                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1220                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1221                         goto nla_put_failure;
1222                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1223                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1224                         goto nla_put_failure;
1225                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1226                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1227                         goto nla_put_failure;
1228                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1229                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1230                         goto nla_put_failure;
1231
1232                 (*split_start)++;
1233                 if (split)
1234                         break;
1235         case 1:
1236                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1237                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1238                             dev->wiphy.cipher_suites))
1239                         goto nla_put_failure;
1240
1241                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1242                                dev->wiphy.max_num_pmkids))
1243                         goto nla_put_failure;
1244
1245                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1246                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1247                         goto nla_put_failure;
1248
1249                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1250                                 dev->wiphy.available_antennas_tx) ||
1251                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1252                                 dev->wiphy.available_antennas_rx))
1253                         goto nla_put_failure;
1254
1255                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1256                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1257                                 dev->wiphy.probe_resp_offload))
1258                         goto nla_put_failure;
1259
1260                 if ((dev->wiphy.available_antennas_tx ||
1261                      dev->wiphy.available_antennas_rx) &&
1262                     dev->ops->get_antenna) {
1263                         u32 tx_ant = 0, rx_ant = 0;
1264                         int res;
1265                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1266                         if (!res) {
1267                                 if (nla_put_u32(msg,
1268                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1269                                                 tx_ant) ||
1270                                     nla_put_u32(msg,
1271                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1272                                                 rx_ant))
1273                                         goto nla_put_failure;
1274                         }
1275                 }
1276
1277                 (*split_start)++;
1278                 if (split)
1279                         break;
1280         case 2:
1281                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1282                                         dev->wiphy.interface_modes))
1283                                 goto nla_put_failure;
1284                 (*split_start)++;
1285                 if (split)
1286                         break;
1287         case 3:
1288                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1289                 if (!nl_bands)
1290                         goto nla_put_failure;
1291
1292                 for (band = *band_start; band < IEEE80211_NUM_BANDS; band++) {
1293                         struct ieee80211_supported_band *sband;
1294
1295                         sband = dev->wiphy.bands[band];
1296
1297                         if (!sband)
1298                                 continue;
1299
1300                         nl_band = nla_nest_start(msg, band);
1301                         if (!nl_band)
1302                                 goto nla_put_failure;
1303
1304                         switch (*chan_start) {
1305                         case 0:
1306                                 if (nl80211_send_band_rateinfo(msg, sband))
1307                                         goto nla_put_failure;
1308                                 (*chan_start)++;
1309                                 if (split)
1310                                         break;
1311                         default:
1312                                 /* add frequencies */
1313                                 nl_freqs = nla_nest_start(
1314                                         msg, NL80211_BAND_ATTR_FREQS);
1315                                 if (!nl_freqs)
1316                                         goto nla_put_failure;
1317
1318                                 for (i = *chan_start - 1;
1319                                      i < sband->n_channels;
1320                                      i++) {
1321                                         nl_freq = nla_nest_start(msg, i);
1322                                         if (!nl_freq)
1323                                                 goto nla_put_failure;
1324
1325                                         chan = &sband->channels[i];
1326
1327                                         if (nl80211_msg_put_channel(msg, chan,
1328                                                                     split))
1329                                                 goto nla_put_failure;
1330
1331                                         nla_nest_end(msg, nl_freq);
1332                                         if (split)
1333                                                 break;
1334                                 }
1335                                 if (i < sband->n_channels)
1336                                         *chan_start = i + 2;
1337                                 else
1338                                         *chan_start = 0;
1339                                 nla_nest_end(msg, nl_freqs);
1340                         }
1341
1342                         nla_nest_end(msg, nl_band);
1343
1344                         if (split) {
1345                                 /* start again here */
1346                                 if (*chan_start)
1347                                         band--;
1348                                 break;
1349                         }
1350                 }
1351                 nla_nest_end(msg, nl_bands);
1352
1353                 if (band < IEEE80211_NUM_BANDS)
1354                         *band_start = band + 1;
1355                 else
1356                         *band_start = 0;
1357
1358                 /* if bands & channels are done, continue outside */
1359                 if (*band_start == 0 && *chan_start == 0)
1360                         (*split_start)++;
1361                 if (split)
1362                         break;
1363         case 4:
1364                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1365                 if (!nl_cmds)
1366                         goto nla_put_failure;
1367
1368                 i = 0;
1369 #define CMD(op, n)                                                      \
1370                  do {                                                   \
1371                         if (dev->ops->op) {                             \
1372                                 i++;                                    \
1373                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1374                                         goto nla_put_failure;           \
1375                         }                                               \
1376                 } while (0)
1377
1378                 CMD(add_virtual_intf, NEW_INTERFACE);
1379                 CMD(change_virtual_intf, SET_INTERFACE);
1380                 CMD(add_key, NEW_KEY);
1381                 CMD(start_ap, START_AP);
1382                 CMD(add_station, NEW_STATION);
1383                 CMD(add_mpath, NEW_MPATH);
1384                 CMD(update_mesh_config, SET_MESH_CONFIG);
1385                 CMD(change_bss, SET_BSS);
1386                 CMD(auth, AUTHENTICATE);
1387                 CMD(assoc, ASSOCIATE);
1388                 CMD(deauth, DEAUTHENTICATE);
1389                 CMD(disassoc, DISASSOCIATE);
1390                 CMD(join_ibss, JOIN_IBSS);
1391                 CMD(join_mesh, JOIN_MESH);
1392                 CMD(set_pmksa, SET_PMKSA);
1393                 CMD(del_pmksa, DEL_PMKSA);
1394                 CMD(flush_pmksa, FLUSH_PMKSA);
1395                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1396                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1397                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1398                 CMD(mgmt_tx, FRAME);
1399                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1400                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1401                         i++;
1402                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1403                                 goto nla_put_failure;
1404                 }
1405                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1406                     dev->ops->join_mesh) {
1407                         i++;
1408                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1409                                 goto nla_put_failure;
1410                 }
1411                 CMD(set_wds_peer, SET_WDS_PEER);
1412                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1413                         CMD(tdls_mgmt, TDLS_MGMT);
1414                         CMD(tdls_oper, TDLS_OPER);
1415                 }
1416                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1417                         CMD(sched_scan_start, START_SCHED_SCAN);
1418                 CMD(probe_client, PROBE_CLIENT);
1419                 CMD(set_noack_map, SET_NOACK_MAP);
1420                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1421                         i++;
1422                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1423                                 goto nla_put_failure;
1424                 }
1425                 CMD(start_p2p_device, START_P2P_DEVICE);
1426                 CMD(set_mcast_rate, SET_MCAST_RATE);
1427
1428 #ifdef CONFIG_NL80211_TESTMODE
1429                 CMD(testmode_cmd, TESTMODE);
1430 #endif
1431
1432 #undef CMD
1433
1434                 if (dev->ops->connect || dev->ops->auth) {
1435                         i++;
1436                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1437                                 goto nla_put_failure;
1438                 }
1439
1440                 if (dev->ops->disconnect || dev->ops->deauth) {
1441                         i++;
1442                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1443                                 goto nla_put_failure;
1444                 }
1445
1446                 nla_nest_end(msg, nl_cmds);
1447                 (*split_start)++;
1448                 if (split)
1449                         break;
1450         case 5:
1451                 if (dev->ops->remain_on_channel &&
1452                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1453                     nla_put_u32(msg,
1454                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1455                                 dev->wiphy.max_remain_on_channel_duration))
1456                         goto nla_put_failure;
1457
1458                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1459                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1460                         goto nla_put_failure;
1461
1462                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1463                         goto nla_put_failure;
1464                 (*split_start)++;
1465                 if (split)
1466                         break;
1467         case 6:
1468 #ifdef CONFIG_PM
1469                 if (nl80211_send_wowlan(msg, dev, split))
1470                         goto nla_put_failure;
1471                 (*split_start)++;
1472                 if (split)
1473                         break;
1474 #else
1475                 (*split_start)++;
1476 #endif
1477         case 7:
1478                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1479                                         dev->wiphy.software_iftypes))
1480                         goto nla_put_failure;
1481
1482                 if (nl80211_put_iface_combinations(&dev->wiphy, msg, split))
1483                         goto nla_put_failure;
1484
1485                 (*split_start)++;
1486                 if (split)
1487                         break;
1488         case 8:
1489                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1490                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1491                                 dev->wiphy.ap_sme_capa))
1492                         goto nla_put_failure;
1493
1494                 features = dev->wiphy.features;
1495                 /*
1496                  * We can only add the per-channel limit information if the
1497                  * dump is split, otherwise it makes it too big. Therefore
1498                  * only advertise it in that case.
1499                  */
1500                 if (split)
1501                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1502                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1503                         goto nla_put_failure;
1504
1505                 if (dev->wiphy.ht_capa_mod_mask &&
1506                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1507                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1508                             dev->wiphy.ht_capa_mod_mask))
1509                         goto nla_put_failure;
1510
1511                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1512                     dev->wiphy.max_acl_mac_addrs &&
1513                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1514                                 dev->wiphy.max_acl_mac_addrs))
1515                         goto nla_put_failure;
1516
1517                 /*
1518                  * Any information below this point is only available to
1519                  * applications that can deal with it being split. This
1520                  * helps ensure that newly added capabilities don't break
1521                  * older tools by overrunning their buffers.
1522                  *
1523                  * We still increment split_start so that in the split
1524                  * case we'll continue with more data in the next round,
1525                  * but break unconditionally so unsplit data stops here.
1526                  */
1527                 (*split_start)++;
1528                 break;
1529         case 9:
1530                 if (dev->wiphy.extended_capabilities &&
1531                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1532                              dev->wiphy.extended_capabilities_len,
1533                              dev->wiphy.extended_capabilities) ||
1534                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1535                              dev->wiphy.extended_capabilities_len,
1536                              dev->wiphy.extended_capabilities_mask)))
1537                         goto nla_put_failure;
1538
1539                 if (dev->wiphy.vht_capa_mod_mask &&
1540                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1541                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1542                             dev->wiphy.vht_capa_mod_mask))
1543                         goto nla_put_failure;
1544
1545                 /* done */
1546                 *split_start = 0;
1547                 break;
1548         }
1549         return genlmsg_end(msg, hdr);
1550
1551  nla_put_failure:
1552         genlmsg_cancel(msg, hdr);
1553         return -EMSGSIZE;
1554 }
1555
1556 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1557 {
1558         int idx = 0, ret;
1559         int start = cb->args[0];
1560         struct cfg80211_registered_device *dev;
1561         s64 filter_wiphy = -1;
1562         bool split = false;
1563         struct nlattr **tb = nl80211_fam.attrbuf;
1564         int res;
1565
1566         mutex_lock(&cfg80211_mutex);
1567         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1568                           tb, nl80211_fam.maxattr, nl80211_policy);
1569         if (res == 0) {
1570                 split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1571                 if (tb[NL80211_ATTR_WIPHY])
1572                         filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1573                 if (tb[NL80211_ATTR_WDEV])
1574                         filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1575                 if (tb[NL80211_ATTR_IFINDEX]) {
1576                         struct net_device *netdev;
1577                         int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1578
1579                         netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1580                         if (!netdev) {
1581                                 mutex_unlock(&cfg80211_mutex);
1582                                 return -ENODEV;
1583                         }
1584                         if (netdev->ieee80211_ptr) {
1585                                 dev = wiphy_to_dev(
1586                                         netdev->ieee80211_ptr->wiphy);
1587                                 filter_wiphy = dev->wiphy_idx;
1588                         }
1589                         dev_put(netdev);
1590                 }
1591         }
1592
1593         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1594                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1595                         continue;
1596                 if (++idx <= start)
1597                         continue;
1598                 if (filter_wiphy != -1 && dev->wiphy_idx != filter_wiphy)
1599                         continue;
1600                 /* attempt to fit multiple wiphy data chunks into the skb */
1601                 do {
1602                         ret = nl80211_send_wiphy(dev, skb,
1603                                                  NETLINK_CB(cb->skb).portid,
1604                                                  cb->nlh->nlmsg_seq,
1605                                                  NLM_F_MULTI,
1606                                                  split, &cb->args[1],
1607                                                  &cb->args[2],
1608                                                  &cb->args[3]);
1609                         if (ret < 0) {
1610                                 /*
1611                                  * If sending the wiphy data didn't fit (ENOBUFS
1612                                  * or EMSGSIZE returned), this SKB is still
1613                                  * empty (so it's not too big because another
1614                                  * wiphy dataset is already in the skb) and
1615                                  * we've not tried to adjust the dump allocation
1616                                  * yet ... then adjust the alloc size to be
1617                                  * bigger, and return 1 but with the empty skb.
1618                                  * This results in an empty message being RX'ed
1619                                  * in userspace, but that is ignored.
1620                                  *
1621                                  * We can then retry with the larger buffer.
1622                                  */
1623                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1624                                     !skb->len &&
1625                                     cb->min_dump_alloc < 4096) {
1626                                         cb->min_dump_alloc = 4096;
1627                                         mutex_unlock(&cfg80211_mutex);
1628                                         return 1;
1629                                 }
1630                                 idx--;
1631                                 break;
1632                         }
1633                 } while (cb->args[1] > 0);
1634                 break;
1635         }
1636         mutex_unlock(&cfg80211_mutex);
1637
1638         cb->args[0] = idx;
1639
1640         return skb->len;
1641 }
1642
1643 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1644 {
1645         struct sk_buff *msg;
1646         struct cfg80211_registered_device *dev = info->user_ptr[0];
1647
1648         msg = nlmsg_new(4096, GFP_KERNEL);
1649         if (!msg)
1650                 return -ENOMEM;
1651
1652         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1653                                false, NULL, NULL, NULL) < 0) {
1654                 nlmsg_free(msg);
1655                 return -ENOBUFS;
1656         }
1657
1658         return genlmsg_reply(msg, info);
1659 }
1660
1661 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1662         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1663         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1664         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1665         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1666         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1667 };
1668
1669 static int parse_txq_params(struct nlattr *tb[],
1670                             struct ieee80211_txq_params *txq_params)
1671 {
1672         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1673             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1674             !tb[NL80211_TXQ_ATTR_AIFS])
1675                 return -EINVAL;
1676
1677         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1678         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1679         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1680         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1681         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1682
1683         if (txq_params->ac >= NL80211_NUM_ACS)
1684                 return -EINVAL;
1685
1686         return 0;
1687 }
1688
1689 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1690 {
1691         /*
1692          * You can only set the channel explicitly for WDS interfaces,
1693          * all others have their channel managed via their respective
1694          * "establish a connection" command (connect, join, ...)
1695          *
1696          * For AP/GO and mesh mode, the channel can be set with the
1697          * channel userspace API, but is only stored and passed to the
1698          * low-level driver when the AP starts or the mesh is joined.
1699          * This is for backward compatibility, userspace can also give
1700          * the channel in the start-ap or join-mesh commands instead.
1701          *
1702          * Monitors are special as they are normally slaved to
1703          * whatever else is going on, so they have their own special
1704          * operation to set the monitor channel if possible.
1705          */
1706         return !wdev ||
1707                 wdev->iftype == NL80211_IFTYPE_AP ||
1708                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1709                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1710                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1711 }
1712
1713 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1714                                  struct genl_info *info,
1715                                  struct cfg80211_chan_def *chandef)
1716 {
1717         u32 control_freq;
1718
1719         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1720                 return -EINVAL;
1721
1722         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1723
1724         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1725         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1726         chandef->center_freq1 = control_freq;
1727         chandef->center_freq2 = 0;
1728
1729         /* Primary channel not allowed */
1730         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1731                 return -EINVAL;
1732
1733         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1734                 enum nl80211_channel_type chantype;
1735
1736                 chantype = nla_get_u32(
1737                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1738
1739                 switch (chantype) {
1740                 case NL80211_CHAN_NO_HT:
1741                 case NL80211_CHAN_HT20:
1742                 case NL80211_CHAN_HT40PLUS:
1743                 case NL80211_CHAN_HT40MINUS:
1744                         cfg80211_chandef_create(chandef, chandef->chan,
1745                                                 chantype);
1746                         break;
1747                 default:
1748                         return -EINVAL;
1749                 }
1750         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1751                 chandef->width =
1752                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1753                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1754                         chandef->center_freq1 =
1755                                 nla_get_u32(
1756                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1757                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1758                         chandef->center_freq2 =
1759                                 nla_get_u32(
1760                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1761         }
1762
1763         if (!cfg80211_chandef_valid(chandef))
1764                 return -EINVAL;
1765
1766         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1767                                      IEEE80211_CHAN_DISABLED))
1768                 return -EINVAL;
1769
1770         return 0;
1771 }
1772
1773 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1774                                  struct wireless_dev *wdev,
1775                                  struct genl_info *info)
1776 {
1777         struct cfg80211_chan_def chandef;
1778         int result;
1779         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1780
1781         if (wdev)
1782                 iftype = wdev->iftype;
1783
1784         if (!nl80211_can_set_dev_channel(wdev))
1785                 return -EOPNOTSUPP;
1786
1787         result = nl80211_parse_chandef(rdev, info, &chandef);
1788         if (result)
1789                 return result;
1790
1791         mutex_lock(&rdev->devlist_mtx);
1792         switch (iftype) {
1793         case NL80211_IFTYPE_AP:
1794         case NL80211_IFTYPE_P2P_GO:
1795                 if (wdev->beacon_interval) {
1796                         result = -EBUSY;
1797                         break;
1798                 }
1799                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1800                         result = -EINVAL;
1801                         break;
1802                 }
1803                 wdev->preset_chandef = chandef;
1804                 result = 0;
1805                 break;
1806         case NL80211_IFTYPE_MESH_POINT:
1807                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1808                 break;
1809         case NL80211_IFTYPE_MONITOR:
1810                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1811                 break;
1812         default:
1813                 result = -EINVAL;
1814         }
1815         mutex_unlock(&rdev->devlist_mtx);
1816
1817         return result;
1818 }
1819
1820 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1821 {
1822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1823         struct net_device *netdev = info->user_ptr[1];
1824
1825         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1826 }
1827
1828 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1829 {
1830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1831         struct net_device *dev = info->user_ptr[1];
1832         struct wireless_dev *wdev = dev->ieee80211_ptr;
1833         const u8 *bssid;
1834
1835         if (!info->attrs[NL80211_ATTR_MAC])
1836                 return -EINVAL;
1837
1838         if (netif_running(dev))
1839                 return -EBUSY;
1840
1841         if (!rdev->ops->set_wds_peer)
1842                 return -EOPNOTSUPP;
1843
1844         if (wdev->iftype != NL80211_IFTYPE_WDS)
1845                 return -EOPNOTSUPP;
1846
1847         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1848         return rdev_set_wds_peer(rdev, dev, bssid);
1849 }
1850
1851
1852 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1853 {
1854         struct cfg80211_registered_device *rdev;
1855         struct net_device *netdev = NULL;
1856         struct wireless_dev *wdev;
1857         int result = 0, rem_txq_params = 0;
1858         struct nlattr *nl_txq_params;
1859         u32 changed;
1860         u8 retry_short = 0, retry_long = 0;
1861         u32 frag_threshold = 0, rts_threshold = 0;
1862         u8 coverage_class = 0;
1863
1864         /*
1865          * Try to find the wiphy and netdev. Normally this
1866          * function shouldn't need the netdev, but this is
1867          * done for backward compatibility -- previously
1868          * setting the channel was done per wiphy, but now
1869          * it is per netdev. Previous userland like hostapd
1870          * also passed a netdev to set_wiphy, so that it is
1871          * possible to let that go to the right netdev!
1872          */
1873         mutex_lock(&cfg80211_mutex);
1874
1875         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1876                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1877
1878                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1879                 if (netdev && netdev->ieee80211_ptr) {
1880                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1881                         mutex_lock(&rdev->mtx);
1882                 } else
1883                         netdev = NULL;
1884         }
1885
1886         if (!netdev) {
1887                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1888                                                   info->attrs);
1889                 if (IS_ERR(rdev)) {
1890                         mutex_unlock(&cfg80211_mutex);
1891                         return PTR_ERR(rdev);
1892                 }
1893                 wdev = NULL;
1894                 netdev = NULL;
1895                 result = 0;
1896
1897                 mutex_lock(&rdev->mtx);
1898         } else
1899                 wdev = netdev->ieee80211_ptr;
1900
1901         /*
1902          * end workaround code, by now the rdev is available
1903          * and locked, and wdev may or may not be NULL.
1904          */
1905
1906         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1907                 result = cfg80211_dev_rename(
1908                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1909
1910         mutex_unlock(&cfg80211_mutex);
1911
1912         if (result)
1913                 goto bad_res;
1914
1915         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1916                 struct ieee80211_txq_params txq_params;
1917                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1918
1919                 if (!rdev->ops->set_txq_params) {
1920                         result = -EOPNOTSUPP;
1921                         goto bad_res;
1922                 }
1923
1924                 if (!netdev) {
1925                         result = -EINVAL;
1926                         goto bad_res;
1927                 }
1928
1929                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1930                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1931                         result = -EINVAL;
1932                         goto bad_res;
1933                 }
1934
1935                 if (!netif_running(netdev)) {
1936                         result = -ENETDOWN;
1937                         goto bad_res;
1938                 }
1939
1940                 nla_for_each_nested(nl_txq_params,
1941                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1942                                     rem_txq_params) {
1943                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1944                                   nla_data(nl_txq_params),
1945                                   nla_len(nl_txq_params),
1946                                   txq_params_policy);
1947                         result = parse_txq_params(tb, &txq_params);
1948                         if (result)
1949                                 goto bad_res;
1950
1951                         result = rdev_set_txq_params(rdev, netdev,
1952                                                      &txq_params);
1953                         if (result)
1954                                 goto bad_res;
1955                 }
1956         }
1957
1958         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1959                 result = __nl80211_set_channel(rdev,
1960                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1961                                 info);
1962                 if (result)
1963                         goto bad_res;
1964         }
1965
1966         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1967                 struct wireless_dev *txp_wdev = wdev;
1968                 enum nl80211_tx_power_setting type;
1969                 int idx, mbm = 0;
1970
1971                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1972                         txp_wdev = NULL;
1973
1974                 if (!rdev->ops->set_tx_power) {
1975                         result = -EOPNOTSUPP;
1976                         goto bad_res;
1977                 }
1978
1979                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1980                 type = nla_get_u32(info->attrs[idx]);
1981
1982                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1983                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1984                         result = -EINVAL;
1985                         goto bad_res;
1986                 }
1987
1988                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1989                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1990                         mbm = nla_get_u32(info->attrs[idx]);
1991                 }
1992
1993                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1994                 if (result)
1995                         goto bad_res;
1996         }
1997
1998         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1999             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2000                 u32 tx_ant, rx_ant;
2001                 if ((!rdev->wiphy.available_antennas_tx &&
2002                      !rdev->wiphy.available_antennas_rx) ||
2003                     !rdev->ops->set_antenna) {
2004                         result = -EOPNOTSUPP;
2005                         goto bad_res;
2006                 }
2007
2008                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2009                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2010
2011                 /* reject antenna configurations which don't match the
2012                  * available antenna masks, except for the "all" mask */
2013                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2014                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2015                         result = -EINVAL;
2016                         goto bad_res;
2017                 }
2018
2019                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2020                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2021
2022                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2023                 if (result)
2024                         goto bad_res;
2025         }
2026
2027         changed = 0;
2028
2029         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2030                 retry_short = nla_get_u8(
2031                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2032                 if (retry_short == 0) {
2033                         result = -EINVAL;
2034                         goto bad_res;
2035                 }
2036                 changed |= WIPHY_PARAM_RETRY_SHORT;
2037         }
2038
2039         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2040                 retry_long = nla_get_u8(
2041                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2042                 if (retry_long == 0) {
2043                         result = -EINVAL;
2044                         goto bad_res;
2045                 }
2046                 changed |= WIPHY_PARAM_RETRY_LONG;
2047         }
2048
2049         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2050                 frag_threshold = nla_get_u32(
2051                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2052                 if (frag_threshold < 256) {
2053                         result = -EINVAL;
2054                         goto bad_res;
2055                 }
2056                 if (frag_threshold != (u32) -1) {
2057                         /*
2058                          * Fragments (apart from the last one) are required to
2059                          * have even length. Make the fragmentation code
2060                          * simpler by stripping LSB should someone try to use
2061                          * odd threshold value.
2062                          */
2063                         frag_threshold &= ~0x1;
2064                 }
2065                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2066         }
2067
2068         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2069                 rts_threshold = nla_get_u32(
2070                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2071                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2072         }
2073
2074         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2075                 coverage_class = nla_get_u8(
2076                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2077                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2078         }
2079
2080         if (changed) {
2081                 u8 old_retry_short, old_retry_long;
2082                 u32 old_frag_threshold, old_rts_threshold;
2083                 u8 old_coverage_class;
2084
2085                 if (!rdev->ops->set_wiphy_params) {
2086                         result = -EOPNOTSUPP;
2087                         goto bad_res;
2088                 }
2089
2090                 old_retry_short = rdev->wiphy.retry_short;
2091                 old_retry_long = rdev->wiphy.retry_long;
2092                 old_frag_threshold = rdev->wiphy.frag_threshold;
2093                 old_rts_threshold = rdev->wiphy.rts_threshold;
2094                 old_coverage_class = rdev->wiphy.coverage_class;
2095
2096                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2097                         rdev->wiphy.retry_short = retry_short;
2098                 if (changed & WIPHY_PARAM_RETRY_LONG)
2099                         rdev->wiphy.retry_long = retry_long;
2100                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2101                         rdev->wiphy.frag_threshold = frag_threshold;
2102                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2103                         rdev->wiphy.rts_threshold = rts_threshold;
2104                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2105                         rdev->wiphy.coverage_class = coverage_class;
2106
2107                 result = rdev_set_wiphy_params(rdev, changed);
2108                 if (result) {
2109                         rdev->wiphy.retry_short = old_retry_short;
2110                         rdev->wiphy.retry_long = old_retry_long;
2111                         rdev->wiphy.frag_threshold = old_frag_threshold;
2112                         rdev->wiphy.rts_threshold = old_rts_threshold;
2113                         rdev->wiphy.coverage_class = old_coverage_class;
2114                 }
2115         }
2116
2117  bad_res:
2118         mutex_unlock(&rdev->mtx);
2119         if (netdev)
2120                 dev_put(netdev);
2121         return result;
2122 }
2123
2124 static inline u64 wdev_id(struct wireless_dev *wdev)
2125 {
2126         return (u64)wdev->identifier |
2127                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2128 }
2129
2130 static int nl80211_send_chandef(struct sk_buff *msg,
2131                                  struct cfg80211_chan_def *chandef)
2132 {
2133         WARN_ON(!cfg80211_chandef_valid(chandef));
2134
2135         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2136                         chandef->chan->center_freq))
2137                 return -ENOBUFS;
2138         switch (chandef->width) {
2139         case NL80211_CHAN_WIDTH_20_NOHT:
2140         case NL80211_CHAN_WIDTH_20:
2141         case NL80211_CHAN_WIDTH_40:
2142                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2143                                 cfg80211_get_chandef_type(chandef)))
2144                         return -ENOBUFS;
2145                 break;
2146         default:
2147                 break;
2148         }
2149         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2150                 return -ENOBUFS;
2151         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2152                 return -ENOBUFS;
2153         if (chandef->center_freq2 &&
2154             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2155                 return -ENOBUFS;
2156         return 0;
2157 }
2158
2159 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2160                               struct cfg80211_registered_device *rdev,
2161                               struct wireless_dev *wdev)
2162 {
2163         struct net_device *dev = wdev->netdev;
2164         void *hdr;
2165
2166         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2167         if (!hdr)
2168                 return -1;
2169
2170         if (dev &&
2171             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2172              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2173                 goto nla_put_failure;
2174
2175         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2176             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2177             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2178             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2179             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2180                         rdev->devlist_generation ^
2181                         (cfg80211_rdev_list_generation << 2)))
2182                 goto nla_put_failure;
2183
2184         if (rdev->ops->get_channel) {
2185                 int ret;
2186                 struct cfg80211_chan_def chandef;
2187
2188                 ret = rdev_get_channel(rdev, wdev, &chandef);
2189                 if (ret == 0) {
2190                         if (nl80211_send_chandef(msg, &chandef))
2191                                 goto nla_put_failure;
2192                 }
2193         }
2194
2195         if (wdev->ssid_len) {
2196                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2197                         goto nla_put_failure;
2198         }
2199
2200         return genlmsg_end(msg, hdr);
2201
2202  nla_put_failure:
2203         genlmsg_cancel(msg, hdr);
2204         return -EMSGSIZE;
2205 }
2206
2207 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2208 {
2209         int wp_idx = 0;
2210         int if_idx = 0;
2211         int wp_start = cb->args[0];
2212         int if_start = cb->args[1];
2213         struct cfg80211_registered_device *rdev;
2214         struct wireless_dev *wdev;
2215
2216         mutex_lock(&cfg80211_mutex);
2217         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2218                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2219                         continue;
2220                 if (wp_idx < wp_start) {
2221                         wp_idx++;
2222                         continue;
2223                 }
2224                 if_idx = 0;
2225
2226                 mutex_lock(&rdev->devlist_mtx);
2227                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2228                         if (if_idx < if_start) {
2229                                 if_idx++;
2230                                 continue;
2231                         }
2232                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2233                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2234                                                rdev, wdev) < 0) {
2235                                 mutex_unlock(&rdev->devlist_mtx);
2236                                 goto out;
2237                         }
2238                         if_idx++;
2239                 }
2240                 mutex_unlock(&rdev->devlist_mtx);
2241
2242                 wp_idx++;
2243         }
2244  out:
2245         mutex_unlock(&cfg80211_mutex);
2246
2247         cb->args[0] = wp_idx;
2248         cb->args[1] = if_idx;
2249
2250         return skb->len;
2251 }
2252
2253 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2254 {
2255         struct sk_buff *msg;
2256         struct cfg80211_registered_device *dev = info->user_ptr[0];
2257         struct wireless_dev *wdev = info->user_ptr[1];
2258
2259         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2260         if (!msg)
2261                 return -ENOMEM;
2262
2263         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2264                                dev, wdev) < 0) {
2265                 nlmsg_free(msg);
2266                 return -ENOBUFS;
2267         }
2268
2269         return genlmsg_reply(msg, info);
2270 }
2271
2272 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2273         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2274         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2275         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2276         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2277         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2278 };
2279
2280 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2281 {
2282         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2283         int flag;
2284
2285         *mntrflags = 0;
2286
2287         if (!nla)
2288                 return -EINVAL;
2289
2290         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2291                              nla, mntr_flags_policy))
2292                 return -EINVAL;
2293
2294         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2295                 if (flags[flag])
2296                         *mntrflags |= (1<<flag);
2297
2298         return 0;
2299 }
2300
2301 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2302                                struct net_device *netdev, u8 use_4addr,
2303                                enum nl80211_iftype iftype)
2304 {
2305         if (!use_4addr) {
2306                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2307                         return -EBUSY;
2308                 return 0;
2309         }
2310
2311         switch (iftype) {
2312         case NL80211_IFTYPE_AP_VLAN:
2313                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2314                         return 0;
2315                 break;
2316         case NL80211_IFTYPE_STATION:
2317                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2318                         return 0;
2319                 break;
2320         default:
2321                 break;
2322         }
2323
2324         return -EOPNOTSUPP;
2325 }
2326
2327 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2328 {
2329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2330         struct vif_params params;
2331         int err;
2332         enum nl80211_iftype otype, ntype;
2333         struct net_device *dev = info->user_ptr[1];
2334         u32 _flags, *flags = NULL;
2335         bool change = false;
2336
2337         memset(&params, 0, sizeof(params));
2338
2339         otype = ntype = dev->ieee80211_ptr->iftype;
2340
2341         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2342                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2343                 if (otype != ntype)
2344                         change = true;
2345                 if (ntype > NL80211_IFTYPE_MAX)
2346                         return -EINVAL;
2347         }
2348
2349         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2350                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2351
2352                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2353                         return -EINVAL;
2354                 if (netif_running(dev))
2355                         return -EBUSY;
2356
2357                 wdev_lock(wdev);
2358                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2359                              IEEE80211_MAX_MESH_ID_LEN);
2360                 wdev->mesh_id_up_len =
2361                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2362                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2363                        wdev->mesh_id_up_len);
2364                 wdev_unlock(wdev);
2365         }
2366
2367         if (info->attrs[NL80211_ATTR_4ADDR]) {
2368                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2369                 change = true;
2370                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2371                 if (err)
2372                         return err;
2373         } else {
2374                 params.use_4addr = -1;
2375         }
2376
2377         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2378                 if (ntype != NL80211_IFTYPE_MONITOR)
2379                         return -EINVAL;
2380                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2381                                           &_flags);
2382                 if (err)
2383                         return err;
2384
2385                 flags = &_flags;
2386                 change = true;
2387         }
2388
2389         if (change)
2390                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2391         else
2392                 err = 0;
2393
2394         if (!err && params.use_4addr != -1)
2395                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2396
2397         return err;
2398 }
2399
2400 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2401 {
2402         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2403         struct vif_params params;
2404         struct wireless_dev *wdev;
2405         struct sk_buff *msg;
2406         int err;
2407         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2408         u32 flags;
2409
2410         memset(&params, 0, sizeof(params));
2411
2412         if (!info->attrs[NL80211_ATTR_IFNAME])
2413                 return -EINVAL;
2414
2415         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2416                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2417                 if (type > NL80211_IFTYPE_MAX)
2418                         return -EINVAL;
2419         }
2420
2421         if (!rdev->ops->add_virtual_intf ||
2422             !(rdev->wiphy.interface_modes & (1 << type)))
2423                 return -EOPNOTSUPP;
2424
2425         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2426                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2427                            ETH_ALEN);
2428                 if (!is_valid_ether_addr(params.macaddr))
2429                         return -EADDRNOTAVAIL;
2430         }
2431
2432         if (info->attrs[NL80211_ATTR_4ADDR]) {
2433                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2434                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2435                 if (err)
2436                         return err;
2437         }
2438
2439         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2440         if (!msg)
2441                 return -ENOMEM;
2442
2443         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2444                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2445                                   &flags);
2446         wdev = rdev_add_virtual_intf(rdev,
2447                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2448                                 type, err ? NULL : &flags, &params);
2449         if (IS_ERR(wdev)) {
2450                 nlmsg_free(msg);
2451                 return PTR_ERR(wdev);
2452         }
2453
2454         switch (type) {
2455         case NL80211_IFTYPE_MESH_POINT:
2456                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2457                         break;
2458                 wdev_lock(wdev);
2459                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2460                              IEEE80211_MAX_MESH_ID_LEN);
2461                 wdev->mesh_id_up_len =
2462                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2463                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2464                        wdev->mesh_id_up_len);
2465                 wdev_unlock(wdev);
2466                 break;
2467         case NL80211_IFTYPE_P2P_DEVICE:
2468                 /*
2469                  * P2P Device doesn't have a netdev, so doesn't go
2470                  * through the netdev notifier and must be added here
2471                  */
2472                 mutex_init(&wdev->mtx);
2473                 INIT_LIST_HEAD(&wdev->event_list);
2474                 spin_lock_init(&wdev->event_lock);
2475                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2476                 spin_lock_init(&wdev->mgmt_registrations_lock);
2477
2478                 mutex_lock(&rdev->devlist_mtx);
2479                 wdev->identifier = ++rdev->wdev_id;
2480                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2481                 rdev->devlist_generation++;
2482                 mutex_unlock(&rdev->devlist_mtx);
2483                 break;
2484         default:
2485                 break;
2486         }
2487
2488         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2489                                rdev, wdev) < 0) {
2490                 nlmsg_free(msg);
2491                 return -ENOBUFS;
2492         }
2493
2494         return genlmsg_reply(msg, info);
2495 }
2496
2497 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2498 {
2499         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2500         struct wireless_dev *wdev = info->user_ptr[1];
2501
2502         if (!rdev->ops->del_virtual_intf)
2503                 return -EOPNOTSUPP;
2504
2505         /*
2506          * If we remove a wireless device without a netdev then clear
2507          * user_ptr[1] so that nl80211_post_doit won't dereference it
2508          * to check if it needs to do dev_put(). Otherwise it crashes
2509          * since the wdev has been freed, unlike with a netdev where
2510          * we need the dev_put() for the netdev to really be freed.
2511          */
2512         if (!wdev->netdev)
2513                 info->user_ptr[1] = NULL;
2514
2515         return rdev_del_virtual_intf(rdev, wdev);
2516 }
2517
2518 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2519 {
2520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2521         struct net_device *dev = info->user_ptr[1];
2522         u16 noack_map;
2523
2524         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2525                 return -EINVAL;
2526
2527         if (!rdev->ops->set_noack_map)
2528                 return -EOPNOTSUPP;
2529
2530         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2531
2532         return rdev_set_noack_map(rdev, dev, noack_map);
2533 }
2534
2535 struct get_key_cookie {
2536         struct sk_buff *msg;
2537         int error;
2538         int idx;
2539 };
2540
2541 static void get_key_callback(void *c, struct key_params *params)
2542 {
2543         struct nlattr *key;
2544         struct get_key_cookie *cookie = c;
2545
2546         if ((params->key &&
2547              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2548                      params->key_len, params->key)) ||
2549             (params->seq &&
2550              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2551                      params->seq_len, params->seq)) ||
2552             (params->cipher &&
2553              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2554                          params->cipher)))
2555                 goto nla_put_failure;
2556
2557         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2558         if (!key)
2559                 goto nla_put_failure;
2560
2561         if ((params->key &&
2562              nla_put(cookie->msg, NL80211_KEY_DATA,
2563                      params->key_len, params->key)) ||
2564             (params->seq &&
2565              nla_put(cookie->msg, NL80211_KEY_SEQ,
2566                      params->seq_len, params->seq)) ||
2567             (params->cipher &&
2568              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2569                          params->cipher)))
2570                 goto nla_put_failure;
2571
2572         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2573                 goto nla_put_failure;
2574
2575         nla_nest_end(cookie->msg, key);
2576
2577         return;
2578  nla_put_failure:
2579         cookie->error = 1;
2580 }
2581
2582 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2583 {
2584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2585         int err;
2586         struct net_device *dev = info->user_ptr[1];
2587         u8 key_idx = 0;
2588         const u8 *mac_addr = NULL;
2589         bool pairwise;
2590         struct get_key_cookie cookie = {
2591                 .error = 0,
2592         };
2593         void *hdr;
2594         struct sk_buff *msg;
2595
2596         if (info->attrs[NL80211_ATTR_KEY_IDX])
2597                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2598
2599         if (key_idx > 5)
2600                 return -EINVAL;
2601
2602         if (info->attrs[NL80211_ATTR_MAC])
2603                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2604
2605         pairwise = !!mac_addr;
2606         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2607                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2608                 if (kt >= NUM_NL80211_KEYTYPES)
2609                         return -EINVAL;
2610                 if (kt != NL80211_KEYTYPE_GROUP &&
2611                     kt != NL80211_KEYTYPE_PAIRWISE)
2612                         return -EINVAL;
2613                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2614         }
2615
2616         if (!rdev->ops->get_key)
2617                 return -EOPNOTSUPP;
2618
2619         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2620         if (!msg)
2621                 return -ENOMEM;
2622
2623         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2624                              NL80211_CMD_NEW_KEY);
2625         if (IS_ERR(hdr))
2626                 return PTR_ERR(hdr);
2627
2628         cookie.msg = msg;
2629         cookie.idx = key_idx;
2630
2631         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2632             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2633                 goto nla_put_failure;
2634         if (mac_addr &&
2635             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2636                 goto nla_put_failure;
2637
2638         if (pairwise && mac_addr &&
2639             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2640                 return -ENOENT;
2641
2642         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2643                            get_key_callback);
2644
2645         if (err)
2646                 goto free_msg;
2647
2648         if (cookie.error)
2649                 goto nla_put_failure;
2650
2651         genlmsg_end(msg, hdr);
2652         return genlmsg_reply(msg, info);
2653
2654  nla_put_failure:
2655         err = -ENOBUFS;
2656  free_msg:
2657         nlmsg_free(msg);
2658         return err;
2659 }
2660
2661 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2662 {
2663         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2664         struct key_parse key;
2665         int err;
2666         struct net_device *dev = info->user_ptr[1];
2667
2668         err = nl80211_parse_key(info, &key);
2669         if (err)
2670                 return err;
2671
2672         if (key.idx < 0)
2673                 return -EINVAL;
2674
2675         /* only support setting default key */
2676         if (!key.def && !key.defmgmt)
2677                 return -EINVAL;
2678
2679         wdev_lock(dev->ieee80211_ptr);
2680
2681         if (key.def) {
2682                 if (!rdev->ops->set_default_key) {
2683                         err = -EOPNOTSUPP;
2684                         goto out;
2685                 }
2686
2687                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2688                 if (err)
2689                         goto out;
2690
2691                 err = rdev_set_default_key(rdev, dev, key.idx,
2692                                                  key.def_uni, key.def_multi);
2693
2694                 if (err)
2695                         goto out;
2696
2697 #ifdef CONFIG_CFG80211_WEXT
2698                 dev->ieee80211_ptr->wext.default_key = key.idx;
2699 #endif
2700         } else {
2701                 if (key.def_uni || !key.def_multi) {
2702                         err = -EINVAL;
2703                         goto out;
2704                 }
2705
2706                 if (!rdev->ops->set_default_mgmt_key) {
2707                         err = -EOPNOTSUPP;
2708                         goto out;
2709                 }
2710
2711                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2712                 if (err)
2713                         goto out;
2714
2715                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2716                 if (err)
2717                         goto out;
2718
2719 #ifdef CONFIG_CFG80211_WEXT
2720                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2721 #endif
2722         }
2723
2724  out:
2725         wdev_unlock(dev->ieee80211_ptr);
2726
2727         return err;
2728 }
2729
2730 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2731 {
2732         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2733         int err;
2734         struct net_device *dev = info->user_ptr[1];
2735         struct key_parse key;
2736         const u8 *mac_addr = NULL;
2737
2738         err = nl80211_parse_key(info, &key);
2739         if (err)
2740                 return err;
2741
2742         if (!key.p.key)
2743                 return -EINVAL;
2744
2745         if (info->attrs[NL80211_ATTR_MAC])
2746                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2747
2748         if (key.type == -1) {
2749                 if (mac_addr)
2750                         key.type = NL80211_KEYTYPE_PAIRWISE;
2751                 else
2752                         key.type = NL80211_KEYTYPE_GROUP;
2753         }
2754
2755         /* for now */
2756         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2757             key.type != NL80211_KEYTYPE_GROUP)
2758                 return -EINVAL;
2759
2760         if (!rdev->ops->add_key)
2761                 return -EOPNOTSUPP;
2762
2763         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2764                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2765                                            mac_addr))
2766                 return -EINVAL;
2767
2768         wdev_lock(dev->ieee80211_ptr);
2769         err = nl80211_key_allowed(dev->ieee80211_ptr);
2770         if (!err)
2771                 err = rdev_add_key(rdev, dev, key.idx,
2772                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2773                                     mac_addr, &key.p);
2774         wdev_unlock(dev->ieee80211_ptr);
2775
2776         return err;
2777 }
2778
2779 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2780 {
2781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2782         int err;
2783         struct net_device *dev = info->user_ptr[1];
2784         u8 *mac_addr = NULL;
2785         struct key_parse key;
2786
2787         err = nl80211_parse_key(info, &key);
2788         if (err)
2789                 return err;
2790
2791         if (info->attrs[NL80211_ATTR_MAC])
2792                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2793
2794         if (key.type == -1) {
2795                 if (mac_addr)
2796                         key.type = NL80211_KEYTYPE_PAIRWISE;
2797                 else
2798                         key.type = NL80211_KEYTYPE_GROUP;
2799         }
2800
2801         /* for now */
2802         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2803             key.type != NL80211_KEYTYPE_GROUP)
2804                 return -EINVAL;
2805
2806         if (!rdev->ops->del_key)
2807                 return -EOPNOTSUPP;
2808
2809         wdev_lock(dev->ieee80211_ptr);
2810         err = nl80211_key_allowed(dev->ieee80211_ptr);
2811
2812         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2813             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2814                 err = -ENOENT;
2815
2816         if (!err)
2817                 err = rdev_del_key(rdev, dev, key.idx,
2818                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2819                                    mac_addr);
2820
2821 #ifdef CONFIG_CFG80211_WEXT
2822         if (!err) {
2823                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2824                         dev->ieee80211_ptr->wext.default_key = -1;
2825                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2826                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2827         }
2828 #endif
2829         wdev_unlock(dev->ieee80211_ptr);
2830
2831         return err;
2832 }
2833
2834 /* This function returns an error or the number of nested attributes */
2835 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2836 {
2837         struct nlattr *attr;
2838         int n_entries = 0, tmp;
2839
2840         nla_for_each_nested(attr, nl_attr, tmp) {
2841                 if (nla_len(attr) != ETH_ALEN)
2842                         return -EINVAL;
2843
2844                 n_entries++;
2845         }
2846
2847         return n_entries;
2848 }
2849
2850 /*
2851  * This function parses ACL information and allocates memory for ACL data.
2852  * On successful return, the calling function is responsible to free the
2853  * ACL buffer returned by this function.
2854  */
2855 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2856                                                 struct genl_info *info)
2857 {
2858         enum nl80211_acl_policy acl_policy;
2859         struct nlattr *attr;
2860         struct cfg80211_acl_data *acl;
2861         int i = 0, n_entries, tmp;
2862
2863         if (!wiphy->max_acl_mac_addrs)
2864                 return ERR_PTR(-EOPNOTSUPP);
2865
2866         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2867                 return ERR_PTR(-EINVAL);
2868
2869         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2870         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2871             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2872                 return ERR_PTR(-EINVAL);
2873
2874         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2875                 return ERR_PTR(-EINVAL);
2876
2877         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2878         if (n_entries < 0)
2879                 return ERR_PTR(n_entries);
2880
2881         if (n_entries > wiphy->max_acl_mac_addrs)
2882                 return ERR_PTR(-ENOTSUPP);
2883
2884         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2885                       GFP_KERNEL);
2886         if (!acl)
2887                 return ERR_PTR(-ENOMEM);
2888
2889         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2890                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2891                 i++;
2892         }
2893
2894         acl->n_acl_entries = n_entries;
2895         acl->acl_policy = acl_policy;
2896
2897         return acl;
2898 }
2899
2900 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2901 {
2902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2903         struct net_device *dev = info->user_ptr[1];
2904         struct cfg80211_acl_data *acl;
2905         int err;
2906
2907         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2908             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2909                 return -EOPNOTSUPP;
2910
2911         if (!dev->ieee80211_ptr->beacon_interval)
2912                 return -EINVAL;
2913
2914         acl = parse_acl_data(&rdev->wiphy, info);
2915         if (IS_ERR(acl))
2916                 return PTR_ERR(acl);
2917
2918         err = rdev_set_mac_acl(rdev, dev, acl);
2919
2920         kfree(acl);
2921
2922         return err;
2923 }
2924
2925 static int nl80211_parse_beacon(struct genl_info *info,
2926                                 struct cfg80211_beacon_data *bcn)
2927 {
2928         bool haveinfo = false;
2929
2930         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2931             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2932             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2933             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2934                 return -EINVAL;
2935
2936         memset(bcn, 0, sizeof(*bcn));
2937
2938         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2939                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2940                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2941                 if (!bcn->head_len)
2942                         return -EINVAL;
2943                 haveinfo = true;
2944         }
2945
2946         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2947                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2948                 bcn->tail_len =
2949                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2950                 haveinfo = true;
2951         }
2952
2953         if (!haveinfo)
2954                 return -EINVAL;
2955
2956         if (info->attrs[NL80211_ATTR_IE]) {
2957                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2958                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2959         }
2960
2961         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2962                 bcn->proberesp_ies =
2963                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2964                 bcn->proberesp_ies_len =
2965                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2966         }
2967
2968         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2969                 bcn->assocresp_ies =
2970                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2971                 bcn->assocresp_ies_len =
2972                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2973         }
2974
2975         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2976                 bcn->probe_resp =
2977                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2978                 bcn->probe_resp_len =
2979                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2980         }
2981
2982         return 0;
2983 }
2984
2985 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2986                                    struct cfg80211_ap_settings *params)
2987 {
2988         struct wireless_dev *wdev;
2989         bool ret = false;
2990
2991         mutex_lock(&rdev->devlist_mtx);
2992
2993         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2994                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2995                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2996                         continue;
2997
2998                 if (!wdev->preset_chandef.chan)
2999                         continue;
3000
3001                 params->chandef = wdev->preset_chandef;
3002                 ret = true;
3003                 break;
3004         }
3005
3006         mutex_unlock(&rdev->devlist_mtx);
3007
3008         return ret;
3009 }
3010
3011 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3012                                     enum nl80211_auth_type auth_type,
3013                                     enum nl80211_commands cmd)
3014 {
3015         if (auth_type > NL80211_AUTHTYPE_MAX)
3016                 return false;
3017
3018         switch (cmd) {
3019         case NL80211_CMD_AUTHENTICATE:
3020                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3021                     auth_type == NL80211_AUTHTYPE_SAE)
3022                         return false;
3023                 return true;
3024         case NL80211_CMD_CONNECT:
3025         case NL80211_CMD_START_AP:
3026                 /* SAE not supported yet */
3027                 if (auth_type == NL80211_AUTHTYPE_SAE)
3028                         return false;
3029                 return true;
3030         default:
3031                 return false;
3032         }
3033 }
3034
3035 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3036 {
3037         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3038         struct net_device *dev = info->user_ptr[1];
3039         struct wireless_dev *wdev = dev->ieee80211_ptr;
3040         struct cfg80211_ap_settings params;
3041         int err;
3042         u8 radar_detect_width = 0;
3043
3044         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3045             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3046                 return -EOPNOTSUPP;
3047
3048         if (!rdev->ops->start_ap)
3049                 return -EOPNOTSUPP;
3050
3051         if (wdev->beacon_interval)
3052                 return -EALREADY;
3053
3054         memset(&params, 0, sizeof(params));
3055
3056         /* these are required for START_AP */
3057         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3058             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3059             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3060                 return -EINVAL;
3061
3062         err = nl80211_parse_beacon(info, &params.beacon);
3063         if (err)
3064                 return err;
3065
3066         params.beacon_interval =
3067                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3068         params.dtim_period =
3069                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3070
3071         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3072         if (err)
3073                 return err;
3074
3075         /*
3076          * In theory, some of these attributes should be required here
3077          * but since they were not used when the command was originally
3078          * added, keep them optional for old user space programs to let
3079          * them continue to work with drivers that do not need the
3080          * additional information -- drivers must check!
3081          */
3082         if (info->attrs[NL80211_ATTR_SSID]) {
3083                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3084                 params.ssid_len =
3085                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3086                 if (params.ssid_len == 0 ||
3087                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3088                         return -EINVAL;
3089         }
3090
3091         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3092                 params.hidden_ssid = nla_get_u32(
3093                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3094                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3095                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3096                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3097                         return -EINVAL;
3098         }
3099
3100         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3101
3102         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3103                 params.auth_type = nla_get_u32(
3104                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3105                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3106                                              NL80211_CMD_START_AP))
3107                         return -EINVAL;
3108         } else
3109                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3110
3111         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3112                                       NL80211_MAX_NR_CIPHER_SUITES);
3113         if (err)
3114                 return err;
3115
3116         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3117                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3118                         return -EOPNOTSUPP;
3119                 params.inactivity_timeout = nla_get_u16(
3120                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3121         }
3122
3123         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3124                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3125                         return -EINVAL;
3126                 params.p2p_ctwindow =
3127                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3128                 if (params.p2p_ctwindow > 127)
3129                         return -EINVAL;
3130                 if (params.p2p_ctwindow != 0 &&
3131                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3132                         return -EINVAL;
3133         }
3134
3135         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3136                 u8 tmp;
3137
3138                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3139                         return -EINVAL;
3140                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3141                 if (tmp > 1)
3142                         return -EINVAL;
3143                 params.p2p_opp_ps = tmp;
3144                 if (params.p2p_opp_ps != 0 &&
3145                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3146                         return -EINVAL;
3147         }
3148
3149         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3150                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3151                 if (err)
3152                         return err;
3153         } else if (wdev->preset_chandef.chan) {
3154                 params.chandef = wdev->preset_chandef;
3155         } else if (!nl80211_get_ap_channel(rdev, &params))
3156                 return -EINVAL;
3157
3158         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3159                 return -EINVAL;
3160
3161         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3162         if (err < 0)
3163                 return err;
3164         if (err) {
3165                 radar_detect_width = BIT(params.chandef.width);
3166                 params.radar_required = true;
3167         }
3168
3169         mutex_lock(&rdev->devlist_mtx);
3170         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3171                                            params.chandef.chan,
3172                                            CHAN_MODE_SHARED,
3173                                            radar_detect_width);
3174         mutex_unlock(&rdev->devlist_mtx);
3175
3176         if (err)
3177                 return err;
3178
3179         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3180                 params.acl = parse_acl_data(&rdev->wiphy, info);
3181                 if (IS_ERR(params.acl))
3182                         return PTR_ERR(params.acl);
3183         }
3184
3185         err = rdev_start_ap(rdev, dev, &params);
3186         if (!err) {
3187                 wdev->preset_chandef = params.chandef;
3188                 wdev->beacon_interval = params.beacon_interval;
3189                 wdev->channel = params.chandef.chan;
3190                 wdev->ssid_len = params.ssid_len;
3191                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3192         }
3193
3194         kfree(params.acl);
3195
3196         return err;
3197 }
3198
3199 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3200 {
3201         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3202         struct net_device *dev = info->user_ptr[1];
3203         struct wireless_dev *wdev = dev->ieee80211_ptr;
3204         struct cfg80211_beacon_data params;
3205         int err;
3206
3207         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3208             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3209                 return -EOPNOTSUPP;
3210
3211         if (!rdev->ops->change_beacon)
3212                 return -EOPNOTSUPP;
3213
3214         if (!wdev->beacon_interval)
3215                 return -EINVAL;
3216
3217         err = nl80211_parse_beacon(info, &params);
3218         if (err)
3219                 return err;
3220
3221         return rdev_change_beacon(rdev, dev, &params);
3222 }
3223
3224 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3225 {
3226         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3227         struct net_device *dev = info->user_ptr[1];
3228
3229         return cfg80211_stop_ap(rdev, dev);
3230 }
3231
3232 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3233         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3234         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3235         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3236         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3237         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3238         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3239 };
3240
3241 static int parse_station_flags(struct genl_info *info,
3242                                enum nl80211_iftype iftype,
3243                                struct station_parameters *params)
3244 {
3245         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3246         struct nlattr *nla;
3247         int flag;
3248
3249         /*
3250          * Try parsing the new attribute first so userspace
3251          * can specify both for older kernels.
3252          */
3253         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3254         if (nla) {
3255                 struct nl80211_sta_flag_update *sta_flags;
3256
3257                 sta_flags = nla_data(nla);
3258                 params->sta_flags_mask = sta_flags->mask;
3259                 params->sta_flags_set = sta_flags->set;
3260                 params->sta_flags_set &= params->sta_flags_mask;
3261                 if ((params->sta_flags_mask |
3262                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3263                         return -EINVAL;
3264                 return 0;
3265         }
3266
3267         /* if present, parse the old attribute */
3268
3269         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3270         if (!nla)
3271                 return 0;
3272
3273         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3274                              nla, sta_flags_policy))
3275                 return -EINVAL;
3276
3277         /*
3278          * Only allow certain flags for interface types so that
3279          * other attributes are silently ignored. Remember that
3280          * this is backward compatibility code with old userspace
3281          * and shouldn't be hit in other cases anyway.
3282          */
3283         switch (iftype) {
3284         case NL80211_IFTYPE_AP:
3285         case NL80211_IFTYPE_AP_VLAN:
3286         case NL80211_IFTYPE_P2P_GO:
3287                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3288                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3289                                          BIT(NL80211_STA_FLAG_WME) |
3290                                          BIT(NL80211_STA_FLAG_MFP);
3291                 break;
3292         case NL80211_IFTYPE_P2P_CLIENT:
3293         case NL80211_IFTYPE_STATION:
3294                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3295                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3296                 break;
3297         case NL80211_IFTYPE_MESH_POINT:
3298                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3299                                          BIT(NL80211_STA_FLAG_MFP) |
3300                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3301         default:
3302                 return -EINVAL;
3303         }
3304
3305         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3306                 if (flags[flag]) {
3307                         params->sta_flags_set |= (1<<flag);
3308
3309                         /* no longer support new API additions in old API */
3310                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3311                                 return -EINVAL;
3312                 }
3313         }
3314
3315         return 0;
3316 }
3317
3318 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3319                                  int attr)
3320 {
3321         struct nlattr *rate;
3322         u32 bitrate;
3323         u16 bitrate_compat;
3324
3325         rate = nla_nest_start(msg, attr);
3326         if (!rate)
3327                 return false;
3328
3329         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3330         bitrate = cfg80211_calculate_bitrate(info);
3331         /* report 16-bit bitrate only if we can */
3332         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3333         if (bitrate > 0 &&
3334             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3335                 return false;
3336         if (bitrate_compat > 0 &&
3337             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3338                 return false;
3339
3340         if (info->flags & RATE_INFO_FLAGS_MCS) {
3341                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3342                         return false;
3343                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3344                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3345                         return false;
3346                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3347                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3348                         return false;
3349         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3350                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3351                         return false;
3352                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3353                         return false;
3354                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3355                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3356                         return false;
3357                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3358                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3359                         return false;
3360                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3361                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3362                         return false;
3363                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3364                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3365                         return false;
3366                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3367                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3368                         return false;
3369         }
3370
3371         nla_nest_end(msg, rate);
3372         return true;
3373 }
3374
3375 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3376                                 int flags,
3377                                 struct cfg80211_registered_device *rdev,
3378                                 struct net_device *dev,
3379                                 const u8 *mac_addr, struct station_info *sinfo)
3380 {
3381         void *hdr;
3382         struct nlattr *sinfoattr, *bss_param;
3383
3384         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3385         if (!hdr)
3386                 return -1;
3387
3388         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3389             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3390             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3391                 goto nla_put_failure;
3392
3393         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3394         if (!sinfoattr)
3395                 goto nla_put_failure;
3396         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3397             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3398                         sinfo->connected_time))
3399                 goto nla_put_failure;
3400         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3401             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3402                         sinfo->inactive_time))
3403                 goto nla_put_failure;
3404         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3405                               STATION_INFO_RX_BYTES64)) &&
3406             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3407                         (u32)sinfo->rx_bytes))
3408                 goto nla_put_failure;
3409         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3410                               NL80211_STA_INFO_TX_BYTES64)) &&
3411             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3412                         (u32)sinfo->tx_bytes))
3413                 goto nla_put_failure;
3414         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3415             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3416                         sinfo->rx_bytes))
3417                 goto nla_put_failure;
3418         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3419             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3420                         sinfo->tx_bytes))
3421                 goto nla_put_failure;
3422         if ((sinfo->filled & STATION_INFO_LLID) &&
3423             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3424                 goto nla_put_failure;
3425         if ((sinfo->filled & STATION_INFO_PLID) &&
3426             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3427                 goto nla_put_failure;
3428         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3429             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3430                        sinfo->plink_state))
3431                 goto nla_put_failure;
3432         switch (rdev->wiphy.signal_type) {
3433         case CFG80211_SIGNAL_TYPE_MBM:
3434                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3435                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3436                                sinfo->signal))
3437                         goto nla_put_failure;
3438                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3439                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3440                                sinfo->signal_avg))
3441                         goto nla_put_failure;
3442                 break;
3443         default:
3444                 break;
3445         }
3446         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3447                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3448                                           NL80211_STA_INFO_TX_BITRATE))
3449                         goto nla_put_failure;
3450         }
3451         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3452                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3453                                           NL80211_STA_INFO_RX_BITRATE))
3454                         goto nla_put_failure;
3455         }
3456         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3457             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3458                         sinfo->rx_packets))
3459                 goto nla_put_failure;
3460         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3461             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3462                         sinfo->tx_packets))
3463                 goto nla_put_failure;
3464         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3465             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3466                         sinfo->tx_retries))
3467                 goto nla_put_failure;
3468         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3469             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3470                         sinfo->tx_failed))
3471                 goto nla_put_failure;
3472         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3473             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3474                         sinfo->beacon_loss_count))
3475                 goto nla_put_failure;
3476         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3477             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3478                         sinfo->local_pm))
3479                 goto nla_put_failure;
3480         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3481             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3482                         sinfo->peer_pm))
3483                 goto nla_put_failure;
3484         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3485             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3486                         sinfo->nonpeer_pm))
3487                 goto nla_put_failure;
3488         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3489                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3490                 if (!bss_param)
3491                         goto nla_put_failure;
3492
3493                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3494                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3495                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3496                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3497                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3498                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3499                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3500                                sinfo->bss_param.dtim_period) ||
3501                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3502                                 sinfo->bss_param.beacon_interval))
3503                         goto nla_put_failure;
3504
3505                 nla_nest_end(msg, bss_param);
3506         }
3507         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3508             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3509                     sizeof(struct nl80211_sta_flag_update),
3510                     &sinfo->sta_flags))
3511                 goto nla_put_failure;
3512         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3513                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3514                             sinfo->t_offset))
3515                 goto nla_put_failure;
3516         nla_nest_end(msg, sinfoattr);
3517
3518         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3519             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3520                     sinfo->assoc_req_ies))
3521                 goto nla_put_failure;
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_station(struct sk_buff *skb,
3531                                 struct netlink_callback *cb)
3532 {
3533         struct station_info sinfo;
3534         struct cfg80211_registered_device *dev;
3535         struct wireless_dev *wdev;
3536         u8 mac_addr[ETH_ALEN];
3537         int sta_idx = cb->args[2];
3538         int err;
3539
3540         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3541         if (err)
3542                 return err;
3543
3544         if (!wdev->netdev) {
3545                 err = -EINVAL;
3546                 goto out_err;
3547         }
3548
3549         if (!dev->ops->dump_station) {
3550                 err = -EOPNOTSUPP;
3551                 goto out_err;
3552         }
3553
3554         while (1) {
3555                 memset(&sinfo, 0, sizeof(sinfo));
3556                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3557                                         mac_addr, &sinfo);
3558                 if (err == -ENOENT)
3559                         break;
3560                 if (err)
3561                         goto out_err;
3562
3563                 if (nl80211_send_station(skb,
3564                                 NETLINK_CB(cb->skb).portid,
3565                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3566                                 dev, wdev->netdev, mac_addr,
3567                                 &sinfo) < 0)
3568                         goto out;
3569
3570                 sta_idx++;
3571         }
3572
3573
3574  out:
3575         cb->args[2] = sta_idx;
3576         err = skb->len;
3577  out_err:
3578         nl80211_finish_wdev_dump(dev);
3579
3580         return err;
3581 }
3582
3583 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3584 {
3585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3586         struct net_device *dev = info->user_ptr[1];
3587         struct station_info sinfo;
3588         struct sk_buff *msg;
3589         u8 *mac_addr = NULL;
3590         int err;
3591
3592         memset(&sinfo, 0, sizeof(sinfo));
3593
3594         if (!info->attrs[NL80211_ATTR_MAC])
3595                 return -EINVAL;
3596
3597         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3598
3599         if (!rdev->ops->get_station)
3600                 return -EOPNOTSUPP;
3601
3602         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3603         if (err)
3604                 return err;
3605
3606         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3607         if (!msg)
3608                 return -ENOMEM;
3609
3610         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3611                                  rdev, dev, mac_addr, &sinfo) < 0) {
3612                 nlmsg_free(msg);
3613                 return -ENOBUFS;
3614         }
3615
3616         return genlmsg_reply(msg, info);
3617 }
3618
3619 int cfg80211_check_station_change(struct wiphy *wiphy,
3620                                   struct station_parameters *params,
3621                                   enum cfg80211_station_type statype)
3622 {
3623         if (params->listen_interval != -1)
3624                 return -EINVAL;
3625         if (params->aid)
3626                 return -EINVAL;
3627
3628         /* When you run into this, adjust the code below for the new flag */
3629         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3630
3631         switch (statype) {
3632         case CFG80211_STA_MESH_PEER_KERNEL:
3633         case CFG80211_STA_MESH_PEER_USER:
3634                 /*
3635                  * No ignoring the TDLS flag here -- the userspace mesh
3636                  * code doesn't have the bug of including TDLS in the
3637                  * mask everywhere.
3638                  */
3639                 if (params->sta_flags_mask &
3640                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3641                                   BIT(NL80211_STA_FLAG_MFP) |
3642                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3643                         return -EINVAL;
3644                 break;
3645         case CFG80211_STA_TDLS_PEER_SETUP:
3646         case CFG80211_STA_TDLS_PEER_ACTIVE:
3647                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3648                         return -EINVAL;
3649                 /* ignore since it can't change */
3650                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3651                 break;
3652         default:
3653                 /* disallow mesh-specific things */
3654                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3655                         return -EINVAL;
3656                 if (params->local_pm)
3657                         return -EINVAL;
3658                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3659                         return -EINVAL;
3660         }
3661
3662         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3663             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3664                 /* TDLS can't be set, ... */
3665                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3666                         return -EINVAL;
3667                 /*
3668                  * ... but don't bother the driver with it. This works around
3669                  * a hostapd/wpa_supplicant issue -- it always includes the
3670                  * TLDS_PEER flag in the mask even for AP mode.
3671                  */
3672                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3673         }
3674
3675         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3676                 /* reject other things that can't change */
3677                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3678                         return -EINVAL;
3679                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3680                         return -EINVAL;
3681                 if (params->supported_rates)
3682                         return -EINVAL;
3683                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3684                         return -EINVAL;
3685         }
3686
3687         if (statype != CFG80211_STA_AP_CLIENT) {
3688                 if (params->vlan)
3689                         return -EINVAL;
3690         }
3691
3692         switch (statype) {
3693         case CFG80211_STA_AP_MLME_CLIENT:
3694                 /* Use this only for authorizing/unauthorizing a station */
3695                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3696                         return -EOPNOTSUPP;
3697                 break;
3698         case CFG80211_STA_AP_CLIENT:
3699                 /* accept only the listed bits */
3700                 if (params->sta_flags_mask &
3701                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3702                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3703                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3704                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3705                                   BIT(NL80211_STA_FLAG_WME) |
3706                                   BIT(NL80211_STA_FLAG_MFP)))
3707                         return -EINVAL;
3708
3709                 /* but authenticated/associated only if driver handles it */
3710                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3711                     params->sta_flags_mask &
3712                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3713                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3714                         return -EINVAL;
3715                 break;
3716         case CFG80211_STA_IBSS:
3717         case CFG80211_STA_AP_STA:
3718                 /* reject any changes other than AUTHORIZED */
3719                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3720                         return -EINVAL;
3721                 break;
3722         case CFG80211_STA_TDLS_PEER_SETUP:
3723                 /* reject any changes other than AUTHORIZED or WME */
3724                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3725                                                BIT(NL80211_STA_FLAG_WME)))
3726                         return -EINVAL;
3727                 /* force (at least) rates when authorizing */
3728                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3729                     !params->supported_rates)
3730                         return -EINVAL;
3731                 break;
3732         case CFG80211_STA_TDLS_PEER_ACTIVE:
3733                 /* reject any changes */
3734                 return -EINVAL;
3735         case CFG80211_STA_MESH_PEER_KERNEL:
3736                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3737                         return -EINVAL;
3738                 break;
3739         case CFG80211_STA_MESH_PEER_USER:
3740                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3741                         return -EINVAL;
3742                 break;
3743         }
3744
3745         return 0;
3746 }
3747 EXPORT_SYMBOL(cfg80211_check_station_change);
3748
3749 /*
3750  * Get vlan interface making sure it is running and on the right wiphy.
3751  */
3752 static struct net_device *get_vlan(struct genl_info *info,
3753                                    struct cfg80211_registered_device *rdev)
3754 {
3755         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3756         struct net_device *v;
3757         int ret;
3758
3759         if (!vlanattr)
3760                 return NULL;
3761
3762         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3763         if (!v)
3764                 return ERR_PTR(-ENODEV);
3765
3766         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3767                 ret = -EINVAL;
3768                 goto error;
3769         }
3770
3771         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3772             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3773             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3774                 ret = -EINVAL;
3775                 goto error;
3776         }
3777
3778         if (!netif_running(v)) {
3779                 ret = -ENETDOWN;
3780                 goto error;
3781         }
3782
3783         return v;
3784  error:
3785         dev_put(v);
3786         return ERR_PTR(ret);
3787 }
3788
3789 static struct nla_policy
3790 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3791         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3792         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3793 };
3794
3795 static int nl80211_parse_sta_wme(struct genl_info *info,
3796                                  struct station_parameters *params)
3797 {
3798         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3799         struct nlattr *nla;
3800         int err;
3801
3802         /* parse WME attributes if present */
3803         if (!info->attrs[NL80211_ATTR_STA_WME])
3804                 return 0;
3805
3806         nla = info->attrs[NL80211_ATTR_STA_WME];
3807         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3808                                nl80211_sta_wme_policy);
3809         if (err)
3810                 return err;
3811
3812         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3813                 params->uapsd_queues = nla_get_u8(
3814                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3815         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3816                 return -EINVAL;
3817
3818         if (tb[NL80211_STA_WME_MAX_SP])
3819                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3820
3821         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3822                 return -EINVAL;
3823
3824         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3825
3826         return 0;
3827 }
3828
3829 static int nl80211_set_station_tdls(struct genl_info *info,
3830                                     struct station_parameters *params)
3831 {
3832         /* Dummy STA entry gets updated once the peer capabilities are known */
3833         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3834                 params->ht_capa =
3835                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3836         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3837                 params->vht_capa =
3838                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3839
3840         return nl80211_parse_sta_wme(info, params);
3841 }
3842
3843 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3844 {
3845         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3846         struct net_device *dev = info->user_ptr[1];
3847         struct station_parameters params;
3848         u8 *mac_addr;
3849         int err;
3850
3851         memset(&params, 0, sizeof(params));
3852
3853         params.listen_interval = -1;
3854
3855         if (!rdev->ops->change_station)
3856                 return -EOPNOTSUPP;
3857
3858         if (info->attrs[NL80211_ATTR_STA_AID])
3859                 return -EINVAL;
3860
3861         if (!info->attrs[NL80211_ATTR_MAC])
3862                 return -EINVAL;
3863
3864         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3865
3866         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3867                 params.supported_rates =
3868                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3869                 params.supported_rates_len =
3870                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3871         }
3872
3873         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3874                 params.capability =
3875                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3876                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3877         }
3878
3879         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3880                 params.ext_capab =
3881                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3882                 params.ext_capab_len =
3883                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3884         }
3885
3886         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3887                 return -EINVAL;
3888
3889         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3890                 return -EINVAL;
3891
3892         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3893                 params.plink_action =
3894                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3895                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3896                         return -EINVAL;
3897         }
3898
3899         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3900                 params.plink_state =
3901                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3902                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3903                         return -EINVAL;
3904                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3905         }
3906
3907         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3908                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3909                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3910
3911                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3912                     pm > NL80211_MESH_POWER_MAX)
3913                         return -EINVAL;
3914
3915                 params.local_pm = pm;
3916         }
3917
3918         /* Include parameters for TDLS peer (will check later) */
3919         err = nl80211_set_station_tdls(info, &params);
3920         if (err)
3921                 return err;
3922
3923         params.vlan = get_vlan(info, rdev);
3924         if (IS_ERR(params.vlan))
3925                 return PTR_ERR(params.vlan);
3926
3927         switch (dev->ieee80211_ptr->iftype) {
3928         case NL80211_IFTYPE_AP:
3929         case NL80211_IFTYPE_AP_VLAN:
3930         case NL80211_IFTYPE_P2P_GO:
3931         case NL80211_IFTYPE_P2P_CLIENT:
3932         case NL80211_IFTYPE_STATION:
3933         case NL80211_IFTYPE_ADHOC:
3934         case NL80211_IFTYPE_MESH_POINT:
3935                 break;
3936         default:
3937                 err = -EOPNOTSUPP;
3938                 goto out_put_vlan;
3939         }
3940
3941         /* driver will call cfg80211_check_station_change() */
3942         err = rdev_change_station(rdev, dev, mac_addr, &params);
3943
3944  out_put_vlan:
3945         if (params.vlan)
3946                 dev_put(params.vlan);
3947
3948         return err;
3949 }
3950
3951 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3952 {
3953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3954         int err;
3955         struct net_device *dev = info->user_ptr[1];
3956         struct station_parameters params;
3957         u8 *mac_addr = NULL;
3958
3959         memset(&params, 0, sizeof(params));
3960
3961         if (!rdev->ops->add_station)
3962                 return -EOPNOTSUPP;
3963
3964         if (!info->attrs[NL80211_ATTR_MAC])
3965                 return -EINVAL;
3966
3967         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3968                 return -EINVAL;
3969
3970         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3971                 return -EINVAL;
3972
3973         if (!info->attrs[NL80211_ATTR_STA_AID])
3974                 return -EINVAL;
3975
3976         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3977         params.supported_rates =
3978                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3979         params.supported_rates_len =
3980                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3981         params.listen_interval =
3982                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3983
3984         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3985         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3986                 return -EINVAL;
3987
3988         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3989                 params.capability =
3990                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3991                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3992         }
3993
3994         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3995                 params.ext_capab =
3996                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3997                 params.ext_capab_len =
3998                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3999         }
4000
4001         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4002                 params.ht_capa =
4003                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4004
4005         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4006                 params.vht_capa =
4007                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4008
4009         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4010                 params.plink_action =
4011                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4012                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4013                         return -EINVAL;
4014         }
4015
4016         err = nl80211_parse_sta_wme(info, &params);
4017         if (err)
4018                 return err;
4019
4020         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4021                 return -EINVAL;
4022
4023         /* When you run into this, adjust the code below for the new flag */
4024         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4025
4026         switch (dev->ieee80211_ptr->iftype) {
4027         case NL80211_IFTYPE_AP:
4028         case NL80211_IFTYPE_AP_VLAN:
4029         case NL80211_IFTYPE_P2P_GO:
4030                 /* ignore WME attributes if iface/sta is not capable */
4031                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4032                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4033                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4034
4035                 /* TDLS peers cannot be added */
4036                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4037                         return -EINVAL;
4038                 /* but don't bother the driver with it */
4039                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4040
4041                 /* allow authenticated/associated only if driver handles it */
4042                 if (!(rdev->wiphy.features &
4043                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4044                     params.sta_flags_mask &
4045                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4046                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4047                         return -EINVAL;
4048
4049                 /* must be last in here for error handling */
4050                 params.vlan = get_vlan(info, rdev);
4051                 if (IS_ERR(params.vlan))
4052                         return PTR_ERR(params.vlan);
4053                 break;
4054         case NL80211_IFTYPE_MESH_POINT:
4055                 /* ignore uAPSD data */
4056                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4057
4058                 /* associated is disallowed */
4059                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4060                         return -EINVAL;
4061                 /* TDLS peers cannot be added */
4062                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4063                         return -EINVAL;
4064                 break;
4065         case NL80211_IFTYPE_STATION:
4066         case NL80211_IFTYPE_P2P_CLIENT:
4067                 /* ignore uAPSD data */
4068                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4069
4070                 /* these are disallowed */
4071                 if (params.sta_flags_mask &
4072                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4073                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4074                         return -EINVAL;
4075                 /* Only TDLS peers can be added */
4076                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4077                         return -EINVAL;
4078                 /* Can only add if TDLS ... */
4079                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4080                         return -EOPNOTSUPP;
4081                 /* ... with external setup is supported */
4082                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4083                         return -EOPNOTSUPP;
4084                 /*
4085                  * Older wpa_supplicant versions always mark the TDLS peer
4086                  * as authorized, but it shouldn't yet be.
4087                  */
4088                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4089                 break;
4090         default:
4091                 return -EOPNOTSUPP;
4092         }
4093
4094         /* be aware of params.vlan when changing code here */
4095
4096         err = rdev_add_station(rdev, dev, mac_addr, &params);
4097
4098         if (params.vlan)
4099                 dev_put(params.vlan);
4100         return err;
4101 }
4102
4103 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4104 {
4105         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4106         struct net_device *dev = info->user_ptr[1];
4107         u8 *mac_addr = NULL;
4108
4109         if (info->attrs[NL80211_ATTR_MAC])
4110                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4111
4112         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4113             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4114             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4115             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4116                 return -EINVAL;
4117
4118         if (!rdev->ops->del_station)
4119                 return -EOPNOTSUPP;
4120
4121         return rdev_del_station(rdev, dev, mac_addr);
4122 }
4123
4124 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4125                                 int flags, struct net_device *dev,
4126                                 u8 *dst, u8 *next_hop,
4127                                 struct mpath_info *pinfo)
4128 {
4129         void *hdr;
4130         struct nlattr *pinfoattr;
4131
4132         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4133         if (!hdr)
4134                 return -1;
4135
4136         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4137             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4138             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4139             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4140                 goto nla_put_failure;
4141
4142         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4143         if (!pinfoattr)
4144                 goto nla_put_failure;
4145         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4146             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4147                         pinfo->frame_qlen))
4148                 goto nla_put_failure;
4149         if (((pinfo->filled & MPATH_INFO_SN) &&
4150              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4151             ((pinfo->filled & MPATH_INFO_METRIC) &&
4152              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4153                          pinfo->metric)) ||
4154             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4155              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4156                          pinfo->exptime)) ||
4157             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4158              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4159                         pinfo->flags)) ||
4160             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4161              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4162                          pinfo->discovery_timeout)) ||
4163             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4164              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4165                         pinfo->discovery_retries)))
4166                 goto nla_put_failure;
4167
4168         nla_nest_end(msg, pinfoattr);
4169
4170         return genlmsg_end(msg, hdr);
4171
4172  nla_put_failure:
4173         genlmsg_cancel(msg, hdr);
4174         return -EMSGSIZE;
4175 }
4176
4177 static int nl80211_dump_mpath(struct sk_buff *skb,
4178                               struct netlink_callback *cb)
4179 {
4180         struct mpath_info pinfo;
4181         struct cfg80211_registered_device *dev;
4182         struct wireless_dev *wdev;
4183         u8 dst[ETH_ALEN];
4184         u8 next_hop[ETH_ALEN];
4185         int path_idx = cb->args[2];
4186         int err;
4187
4188         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4189         if (err)
4190                 return err;
4191
4192         if (!dev->ops->dump_mpath) {
4193                 err = -EOPNOTSUPP;
4194                 goto out_err;
4195         }
4196
4197         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4198                 err = -EOPNOTSUPP;
4199                 goto out_err;
4200         }
4201
4202         while (1) {
4203                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4204                                       next_hop, &pinfo);
4205                 if (err == -ENOENT)
4206                         break;
4207                 if (err)
4208                         goto out_err;
4209
4210                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4211                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4212                                        wdev->netdev, dst, next_hop,
4213                                        &pinfo) < 0)
4214                         goto out;
4215
4216                 path_idx++;
4217         }
4218
4219
4220  out:
4221         cb->args[2] = path_idx;
4222         err = skb->len;
4223  out_err:
4224         nl80211_finish_wdev_dump(dev);
4225         return err;
4226 }
4227
4228 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4229 {
4230         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4231         int err;
4232         struct net_device *dev = info->user_ptr[1];
4233         struct mpath_info pinfo;
4234         struct sk_buff *msg;
4235         u8 *dst = NULL;
4236         u8 next_hop[ETH_ALEN];
4237
4238         memset(&pinfo, 0, sizeof(pinfo));
4239
4240         if (!info->attrs[NL80211_ATTR_MAC])
4241                 return -EINVAL;
4242
4243         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4244
4245         if (!rdev->ops->get_mpath)
4246                 return -EOPNOTSUPP;
4247
4248         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4249                 return -EOPNOTSUPP;
4250
4251         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4252         if (err)
4253                 return err;
4254
4255         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4256         if (!msg)
4257                 return -ENOMEM;
4258
4259         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4260                                  dev, dst, next_hop, &pinfo) < 0) {
4261                 nlmsg_free(msg);
4262                 return -ENOBUFS;
4263         }
4264
4265         return genlmsg_reply(msg, info);
4266 }
4267
4268 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4269 {
4270         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4271         struct net_device *dev = info->user_ptr[1];
4272         u8 *dst = NULL;
4273         u8 *next_hop = NULL;
4274
4275         if (!info->attrs[NL80211_ATTR_MAC])
4276                 return -EINVAL;
4277
4278         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4279                 return -EINVAL;
4280
4281         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4282         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4283
4284         if (!rdev->ops->change_mpath)
4285                 return -EOPNOTSUPP;
4286
4287         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4288                 return -EOPNOTSUPP;
4289
4290         return rdev_change_mpath(rdev, dev, dst, next_hop);
4291 }
4292
4293 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4294 {
4295         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4296         struct net_device *dev = info->user_ptr[1];
4297         u8 *dst = NULL;
4298         u8 *next_hop = NULL;
4299
4300         if (!info->attrs[NL80211_ATTR_MAC])
4301                 return -EINVAL;
4302
4303         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4304                 return -EINVAL;
4305
4306         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4307         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4308
4309         if (!rdev->ops->add_mpath)
4310                 return -EOPNOTSUPP;
4311
4312         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4313                 return -EOPNOTSUPP;
4314
4315         return rdev_add_mpath(rdev, dev, dst, next_hop);
4316 }
4317
4318 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4319 {
4320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4321         struct net_device *dev = info->user_ptr[1];
4322         u8 *dst = NULL;
4323
4324         if (info->attrs[NL80211_ATTR_MAC])
4325                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4326
4327         if (!rdev->ops->del_mpath)
4328                 return -EOPNOTSUPP;
4329
4330         return rdev_del_mpath(rdev, dev, dst);
4331 }
4332
4333 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4334 {
4335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4336         struct net_device *dev = info->user_ptr[1];
4337         struct bss_parameters params;
4338
4339         memset(&params, 0, sizeof(params));
4340         /* default to not changing parameters */
4341         params.use_cts_prot = -1;
4342         params.use_short_preamble = -1;
4343         params.use_short_slot_time = -1;
4344         params.ap_isolate = -1;
4345         params.ht_opmode = -1;
4346         params.p2p_ctwindow = -1;
4347         params.p2p_opp_ps = -1;
4348
4349         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4350                 params.use_cts_prot =
4351                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4352         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4353                 params.use_short_preamble =
4354                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4355         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4356                 params.use_short_slot_time =
4357                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4358         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4359                 params.basic_rates =
4360                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4361                 params.basic_rates_len =
4362                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4363         }
4364         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4365                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4366         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4367                 params.ht_opmode =
4368                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4369
4370         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4371                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4372                         return -EINVAL;
4373                 params.p2p_ctwindow =
4374                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4375                 if (params.p2p_ctwindow < 0)
4376                         return -EINVAL;
4377                 if (params.p2p_ctwindow != 0 &&
4378                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4379                         return -EINVAL;
4380         }
4381
4382         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4383                 u8 tmp;
4384
4385                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4386                         return -EINVAL;
4387                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4388                 if (tmp > 1)
4389                         return -EINVAL;
4390                 params.p2p_opp_ps = tmp;
4391                 if (params.p2p_opp_ps &&
4392                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4393                         return -EINVAL;
4394         }
4395
4396         if (!rdev->ops->change_bss)
4397                 return -EOPNOTSUPP;
4398
4399         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4400             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4401                 return -EOPNOTSUPP;
4402
4403         return rdev_change_bss(rdev, dev, &params);
4404 }
4405
4406 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4407         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4408         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4409         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4410         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4411         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4412         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4413 };
4414
4415 static int parse_reg_rule(struct nlattr *tb[],
4416         struct ieee80211_reg_rule *reg_rule)
4417 {
4418         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4419         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4420
4421         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4422                 return -EINVAL;
4423         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4424                 return -EINVAL;
4425         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4426                 return -EINVAL;
4427         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4428                 return -EINVAL;
4429         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4430                 return -EINVAL;
4431
4432         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4433
4434         freq_range->start_freq_khz =
4435                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4436         freq_range->end_freq_khz =
4437                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4438         freq_range->max_bandwidth_khz =
4439                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4440
4441         power_rule->max_eirp =
4442                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4443
4444         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4445                 power_rule->max_antenna_gain =
4446                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4447
4448         return 0;
4449 }
4450
4451 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4452 {
4453         int r;
4454         char *data = NULL;
4455         enum nl80211_user_reg_hint_type user_reg_hint_type;
4456
4457         /*
4458          * You should only get this when cfg80211 hasn't yet initialized
4459          * completely when built-in to the kernel right between the time
4460          * window between nl80211_init() and regulatory_init(), if that is
4461          * even possible.
4462          */
4463         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4464                 return -EINPROGRESS;
4465
4466         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4467                 return -EINVAL;
4468
4469         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4470
4471         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4472                 user_reg_hint_type =
4473                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4474         else
4475                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4476
4477         switch (user_reg_hint_type) {
4478         case NL80211_USER_REG_HINT_USER:
4479         case NL80211_USER_REG_HINT_CELL_BASE:
4480                 break;
4481         default:
4482                 return -EINVAL;
4483         }
4484
4485         r = regulatory_hint_user(data, user_reg_hint_type);
4486
4487         return r;
4488 }
4489
4490 static int nl80211_get_mesh_config(struct sk_buff *skb,
4491                                    struct genl_info *info)
4492 {
4493         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4494         struct net_device *dev = info->user_ptr[1];
4495         struct wireless_dev *wdev = dev->ieee80211_ptr;
4496         struct mesh_config cur_params;
4497         int err = 0;
4498         void *hdr;
4499         struct nlattr *pinfoattr;
4500         struct sk_buff *msg;
4501
4502         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4503                 return -EOPNOTSUPP;
4504
4505         if (!rdev->ops->get_mesh_config)
4506                 return -EOPNOTSUPP;
4507
4508         wdev_lock(wdev);
4509         /* If not connected, get default parameters */
4510         if (!wdev->mesh_id_len)
4511                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4512         else
4513                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4514         wdev_unlock(wdev);
4515
4516         if (err)
4517                 return err;
4518
4519         /* Draw up a netlink message to send back */
4520         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4521         if (!msg)
4522                 return -ENOMEM;
4523         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4524                              NL80211_CMD_GET_MESH_CONFIG);
4525         if (!hdr)
4526                 goto out;
4527         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4528         if (!pinfoattr)
4529                 goto nla_put_failure;
4530         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4531             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4532                         cur_params.dot11MeshRetryTimeout) ||
4533             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4534                         cur_params.dot11MeshConfirmTimeout) ||
4535             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4536                         cur_params.dot11MeshHoldingTimeout) ||
4537             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4538                         cur_params.dot11MeshMaxPeerLinks) ||
4539             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4540                        cur_params.dot11MeshMaxRetries) ||
4541             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4542                        cur_params.dot11MeshTTL) ||
4543             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4544                        cur_params.element_ttl) ||
4545             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4546                        cur_params.auto_open_plinks) ||
4547             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4548                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4549             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4550                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4551             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4552                         cur_params.path_refresh_time) ||
4553             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4554                         cur_params.min_discovery_timeout) ||
4555             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4556                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4557             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4558                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4559             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4560                         cur_params.dot11MeshHWMPperrMinInterval) ||
4561             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4562                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4563             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4564                        cur_params.dot11MeshHWMPRootMode) ||
4565             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4566                         cur_params.dot11MeshHWMPRannInterval) ||
4567             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4568                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4569             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4570                        cur_params.dot11MeshForwarding) ||
4571             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4572                         cur_params.rssi_threshold) ||
4573             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4574                         cur_params.ht_opmode) ||
4575             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4576                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4577             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4578                         cur_params.dot11MeshHWMProotInterval) ||
4579             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4580                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4581             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4582                         cur_params.power_mode) ||
4583             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4584                         cur_params.dot11MeshAwakeWindowDuration))
4585                 goto nla_put_failure;
4586         nla_nest_end(msg, pinfoattr);
4587         genlmsg_end(msg, hdr);
4588         return genlmsg_reply(msg, info);
4589
4590  nla_put_failure:
4591         genlmsg_cancel(msg, hdr);
4592  out:
4593         nlmsg_free(msg);
4594         return -ENOBUFS;
4595 }
4596
4597 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4598         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4599         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4600         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4601         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4602         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4603         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4604         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4605         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4606         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4607         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4608         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4609         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4610         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4611         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4612         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4613         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4614         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4615         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4616         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4617         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4618         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4619         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4620         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4621         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4622         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4623         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4624         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4625 };
4626
4627 static const struct nla_policy
4628         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4629         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4630         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4631         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4632         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4633         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4634         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4635                                     .len = IEEE80211_MAX_DATA_LEN },
4636         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4637 };
4638
4639 static int nl80211_parse_mesh_config(struct genl_info *info,
4640                                      struct mesh_config *cfg,
4641                                      u32 *mask_out)
4642 {
4643         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4644         u32 mask = 0;
4645
4646 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4647 do {                                                                        \
4648         if (tb[attr]) {                                                     \
4649                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4650                         return -EINVAL;                                     \
4651                 cfg->param = fn(tb[attr]);                                  \
4652                 mask |= (1 << (attr - 1));                                  \
4653         }                                                                   \
4654 } while (0)
4655
4656
4657         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4658                 return -EINVAL;
4659         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4660                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4661                              nl80211_meshconf_params_policy))
4662                 return -EINVAL;
4663
4664         /* This makes sure that there aren't more than 32 mesh config
4665          * parameters (otherwise our bitfield scheme would not work.) */
4666         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4667
4668         /* Fill in the params struct */
4669         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4670                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4671                                   nla_get_u16);
4672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4673                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4674                                   nla_get_u16);
4675         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4676                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4677                                   nla_get_u16);
4678         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4679                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4680                                   nla_get_u16);
4681         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4682                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4683                                   nla_get_u8);
4684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4685                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4686         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4687                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4688                                   nla_get_u8);
4689         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4690                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4691                                   nla_get_u8);
4692         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4693                                   1, 255, mask,
4694                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4695                                   nla_get_u32);
4696         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4697                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4698                                   nla_get_u8);
4699         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4700                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4701                                   nla_get_u32);
4702         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4703                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4704                                   nla_get_u16);
4705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4706                                   1, 65535, mask,
4707                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4708                                   nla_get_u32);
4709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4710                                   1, 65535, mask,
4711                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4712                                   nla_get_u16);
4713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4714                                   1, 65535, mask,
4715                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4716                                   nla_get_u16);
4717         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4718                                   dot11MeshHWMPnetDiameterTraversalTime,
4719                                   1, 65535, mask,
4720                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4721                                   nla_get_u16);
4722         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4723                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4724                                   nla_get_u8);
4725         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4726                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4727                                   nla_get_u16);
4728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4729                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4730                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4731                                   nla_get_u8);
4732         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4733                                   mask, NL80211_MESHCONF_FORWARDING,
4734                                   nla_get_u8);
4735         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4736                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4737                                   nla_get_u32);
4738         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4739                                   mask, NL80211_MESHCONF_HT_OPMODE,
4740                                   nla_get_u16);
4741         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4742                                   1, 65535, mask,
4743                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4744                                   nla_get_u32);
4745         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4746                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4747                                   nla_get_u16);
4748         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4749                                   dot11MeshHWMPconfirmationInterval,
4750                                   1, 65535, mask,
4751                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4752                                   nla_get_u16);
4753         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4754                                   NL80211_MESH_POWER_ACTIVE,
4755                                   NL80211_MESH_POWER_MAX,
4756                                   mask, NL80211_MESHCONF_POWER_MODE,
4757                                   nla_get_u32);
4758         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4759                                   0, 65535, mask,
4760                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4761         if (mask_out)
4762                 *mask_out = mask;
4763
4764         return 0;
4765
4766 #undef FILL_IN_MESH_PARAM_IF_SET
4767 }
4768
4769 static int nl80211_parse_mesh_setup(struct genl_info *info,
4770                                      struct mesh_setup *setup)
4771 {
4772         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4773         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4774
4775         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4776                 return -EINVAL;
4777         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4778                              info->attrs[NL80211_ATTR_MESH_SETUP],
4779                              nl80211_mesh_setup_params_policy))
4780                 return -EINVAL;
4781
4782         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4783                 setup->sync_method =
4784                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4785                  IEEE80211_SYNC_METHOD_VENDOR :
4786                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4787
4788         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4789                 setup->path_sel_proto =
4790                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4791                  IEEE80211_PATH_PROTOCOL_VENDOR :
4792                  IEEE80211_PATH_PROTOCOL_HWMP;
4793
4794         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4795                 setup->path_metric =
4796                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4797                  IEEE80211_PATH_METRIC_VENDOR :
4798                  IEEE80211_PATH_METRIC_AIRTIME;
4799
4800
4801         if (tb[NL80211_MESH_SETUP_IE]) {
4802                 struct nlattr *ieattr =
4803                         tb[NL80211_MESH_SETUP_IE];
4804                 if (!is_valid_ie_attr(ieattr))
4805                         return -EINVAL;
4806                 setup->ie = nla_data(ieattr);
4807                 setup->ie_len = nla_len(ieattr);
4808         }
4809         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4810             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4811                 return -EINVAL;
4812         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4813         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4814         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4815         if (setup->is_secure)
4816                 setup->user_mpm = true;
4817
4818         return 0;
4819 }
4820
4821 static int nl80211_update_mesh_config(struct sk_buff *skb,
4822                                       struct genl_info *info)
4823 {
4824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4825         struct net_device *dev = info->user_ptr[1];
4826         struct wireless_dev *wdev = dev->ieee80211_ptr;
4827         struct mesh_config cfg;
4828         u32 mask;
4829         int err;
4830
4831         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4832                 return -EOPNOTSUPP;
4833
4834         if (!rdev->ops->update_mesh_config)
4835                 return -EOPNOTSUPP;
4836
4837         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4838         if (err)
4839                 return err;
4840
4841         wdev_lock(wdev);
4842         if (!wdev->mesh_id_len)
4843                 err = -ENOLINK;
4844
4845         if (!err)
4846                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4847
4848         wdev_unlock(wdev);
4849
4850         return err;
4851 }
4852
4853 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4854 {
4855         const struct ieee80211_regdomain *regdom;
4856         struct sk_buff *msg;
4857         void *hdr = NULL;
4858         struct nlattr *nl_reg_rules;
4859         unsigned int i;
4860         int err = -EINVAL;
4861
4862         mutex_lock(&cfg80211_mutex);
4863
4864         if (!cfg80211_regdomain)
4865                 goto out;
4866
4867         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4868         if (!msg) {
4869                 err = -ENOBUFS;
4870                 goto out;
4871         }
4872
4873         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4874                              NL80211_CMD_GET_REG);
4875         if (!hdr)
4876                 goto put_failure;
4877
4878         if (reg_last_request_cell_base() &&
4879             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4880                         NL80211_USER_REG_HINT_CELL_BASE))
4881                 goto nla_put_failure;
4882
4883         rcu_read_lock();
4884         regdom = rcu_dereference(cfg80211_regdomain);
4885
4886         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4887             (regdom->dfs_region &&
4888              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4889                 goto nla_put_failure_rcu;
4890
4891         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4892         if (!nl_reg_rules)
4893                 goto nla_put_failure_rcu;
4894
4895         for (i = 0; i < regdom->n_reg_rules; i++) {
4896                 struct nlattr *nl_reg_rule;
4897                 const struct ieee80211_reg_rule *reg_rule;
4898                 const struct ieee80211_freq_range *freq_range;
4899                 const struct ieee80211_power_rule *power_rule;
4900
4901                 reg_rule = &regdom->reg_rules[i];
4902                 freq_range = &reg_rule->freq_range;
4903                 power_rule = &reg_rule->power_rule;
4904
4905                 nl_reg_rule = nla_nest_start(msg, i);
4906                 if (!nl_reg_rule)
4907                         goto nla_put_failure_rcu;
4908
4909                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4910                                 reg_rule->flags) ||
4911                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4912                                 freq_range->start_freq_khz) ||
4913                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4914                                 freq_range->end_freq_khz) ||
4915                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4916                                 freq_range->max_bandwidth_khz) ||
4917                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4918                                 power_rule->max_antenna_gain) ||
4919                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4920                                 power_rule->max_eirp))
4921                         goto nla_put_failure_rcu;
4922
4923                 nla_nest_end(msg, nl_reg_rule);
4924         }
4925         rcu_read_unlock();
4926
4927         nla_nest_end(msg, nl_reg_rules);
4928
4929         genlmsg_end(msg, hdr);
4930         err = genlmsg_reply(msg, info);
4931         goto out;
4932
4933 nla_put_failure_rcu:
4934         rcu_read_unlock();
4935 nla_put_failure:
4936         genlmsg_cancel(msg, hdr);
4937 put_failure:
4938         nlmsg_free(msg);
4939         err = -EMSGSIZE;
4940 out:
4941         mutex_unlock(&cfg80211_mutex);
4942         return err;
4943 }
4944
4945 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4946 {
4947         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4948         struct nlattr *nl_reg_rule;
4949         char *alpha2 = NULL;
4950         int rem_reg_rules = 0, r = 0;
4951         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4952         u8 dfs_region = 0;
4953         struct ieee80211_regdomain *rd = NULL;
4954
4955         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4956                 return -EINVAL;
4957
4958         if (!info->attrs[NL80211_ATTR_REG_RULES])
4959                 return -EINVAL;
4960
4961         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4962
4963         if (info->attrs[NL80211_ATTR_DFS_REGION])
4964                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4965
4966         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4967                             rem_reg_rules) {
4968                 num_rules++;
4969                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4970                         return -EINVAL;
4971         }
4972
4973         size_of_regd = sizeof(struct ieee80211_regdomain) +
4974                        num_rules * sizeof(struct ieee80211_reg_rule);
4975
4976         rd = kzalloc(size_of_regd, GFP_KERNEL);
4977         if (!rd)
4978                 return -ENOMEM;
4979
4980         rd->n_reg_rules = num_rules;
4981         rd->alpha2[0] = alpha2[0];
4982         rd->alpha2[1] = alpha2[1];
4983
4984         /*
4985          * Disable DFS master mode if the DFS region was
4986          * not supported or known on this kernel.
4987          */
4988         if (reg_supported_dfs_region(dfs_region))
4989                 rd->dfs_region = dfs_region;
4990
4991         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4992                             rem_reg_rules) {
4993                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4994                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4995                           reg_rule_policy);
4996                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4997                 if (r)
4998                         goto bad_reg;
4999
5000                 rule_idx++;
5001
5002                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5003                         r = -EINVAL;
5004                         goto bad_reg;
5005                 }
5006         }
5007
5008         mutex_lock(&cfg80211_mutex);
5009
5010         r = set_regdom(rd);
5011         /* set_regdom took ownership */
5012         rd = NULL;
5013         mutex_unlock(&cfg80211_mutex);
5014
5015  bad_reg:
5016         kfree(rd);
5017         return r;
5018 }
5019
5020 static int validate_scan_freqs(struct nlattr *freqs)
5021 {
5022         struct nlattr *attr1, *attr2;
5023         int n_channels = 0, tmp1, tmp2;
5024
5025         nla_for_each_nested(attr1, freqs, tmp1) {
5026                 n_channels++;
5027                 /*
5028                  * Some hardware has a limited channel list for
5029                  * scanning, and it is pretty much nonsensical
5030                  * to scan for a channel twice, so disallow that
5031                  * and don't require drivers to check that the
5032                  * channel list they get isn't longer than what
5033                  * they can scan, as long as they can scan all
5034                  * the channels they registered at once.
5035                  */
5036                 nla_for_each_nested(attr2, freqs, tmp2)
5037                         if (attr1 != attr2 &&
5038                             nla_get_u32(attr1) == nla_get_u32(attr2))
5039                                 return 0;
5040         }
5041
5042         return n_channels;
5043 }
5044
5045 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5046 {
5047         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5048         struct wireless_dev *wdev = info->user_ptr[1];
5049         struct cfg80211_scan_request *request;
5050         struct nlattr *attr;
5051         struct wiphy *wiphy;
5052         int err, tmp, n_ssids = 0, n_channels, i;
5053         size_t ie_len;
5054
5055         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5056                 return -EINVAL;
5057
5058         wiphy = &rdev->wiphy;
5059
5060         if (!rdev->ops->scan)
5061                 return -EOPNOTSUPP;
5062
5063         if (rdev->scan_req)
5064                 return -EBUSY;
5065
5066         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5067                 n_channels = validate_scan_freqs(
5068                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5069                 if (!n_channels)
5070                         return -EINVAL;
5071         } else {
5072                 enum ieee80211_band band;
5073                 n_channels = 0;
5074
5075                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5076                         if (wiphy->bands[band])
5077                                 n_channels += wiphy->bands[band]->n_channels;
5078         }
5079
5080         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5081                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5082                         n_ssids++;
5083
5084         if (n_ssids > wiphy->max_scan_ssids)
5085                 return -EINVAL;
5086
5087         if (info->attrs[NL80211_ATTR_IE])
5088                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5089         else
5090                 ie_len = 0;
5091
5092         if (ie_len > wiphy->max_scan_ie_len)
5093                 return -EINVAL;
5094
5095         request = kzalloc(sizeof(*request)
5096                         + sizeof(*request->ssids) * n_ssids
5097                         + sizeof(*request->channels) * n_channels
5098                         + ie_len, GFP_KERNEL);
5099         if (!request)
5100                 return -ENOMEM;
5101
5102         if (n_ssids)
5103                 request->ssids = (void *)&request->channels[n_channels];
5104         request->n_ssids = n_ssids;
5105         if (ie_len) {
5106                 if (request->ssids)
5107                         request->ie = (void *)(request->ssids + n_ssids);
5108                 else
5109                         request->ie = (void *)(request->channels + n_channels);
5110         }
5111
5112         i = 0;
5113         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5114                 /* user specified, bail out if channel not found */
5115                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5116                         struct ieee80211_channel *chan;
5117
5118                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5119
5120                         if (!chan) {
5121                                 err = -EINVAL;
5122                                 goto out_free;
5123                         }
5124
5125                         /* ignore disabled channels */
5126                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5127                                 continue;
5128
5129                         request->channels[i] = chan;
5130                         i++;
5131                 }
5132         } else {
5133                 enum ieee80211_band band;
5134
5135                 /* all channels */
5136                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5137                         int j;
5138                         if (!wiphy->bands[band])
5139                                 continue;
5140                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5141                                 struct ieee80211_channel *chan;
5142
5143                                 chan = &wiphy->bands[band]->channels[j];
5144
5145                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5146                                         continue;
5147
5148                                 request->channels[i] = chan;
5149                                 i++;
5150                         }
5151                 }
5152         }
5153
5154         if (!i) {
5155                 err = -EINVAL;
5156                 goto out_free;
5157         }
5158
5159         request->n_channels = i;
5160
5161         i = 0;
5162         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5163                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5164                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5165                                 err = -EINVAL;
5166                                 goto out_free;
5167                         }
5168                         request->ssids[i].ssid_len = nla_len(attr);
5169                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5170                         i++;
5171                 }
5172         }
5173
5174         if (info->attrs[NL80211_ATTR_IE]) {
5175                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5176                 memcpy((void *)request->ie,
5177                        nla_data(info->attrs[NL80211_ATTR_IE]),
5178                        request->ie_len);
5179         }
5180
5181         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5182                 if (wiphy->bands[i])
5183                         request->rates[i] =
5184                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5185
5186         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5187                 nla_for_each_nested(attr,
5188                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5189                                     tmp) {
5190                         enum ieee80211_band band = nla_type(attr);
5191
5192                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5193                                 err = -EINVAL;
5194                                 goto out_free;
5195                         }
5196                         err = ieee80211_get_ratemask(wiphy->bands[band],
5197                                                      nla_data(attr),
5198                                                      nla_len(attr),
5199                                                      &request->rates[band]);
5200                         if (err)
5201                                 goto out_free;
5202                 }
5203         }
5204
5205         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5206                 request->flags = nla_get_u32(
5207                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5208                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5209                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5210                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5211                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5212                         err = -EOPNOTSUPP;
5213                         goto out_free;
5214                 }
5215         }
5216
5217         request->no_cck =
5218                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5219
5220         request->wdev = wdev;
5221         request->wiphy = &rdev->wiphy;
5222         request->scan_start = jiffies;
5223
5224         rdev->scan_req = request;
5225         err = rdev_scan(rdev, request);
5226
5227         if (!err) {
5228                 nl80211_send_scan_start(rdev, wdev);
5229                 if (wdev->netdev)
5230                         dev_hold(wdev->netdev);
5231         } else {
5232  out_free:
5233                 rdev->scan_req = NULL;
5234                 kfree(request);
5235         }
5236
5237         return err;
5238 }
5239
5240 static int nl80211_start_sched_scan(struct sk_buff *skb,
5241                                     struct genl_info *info)
5242 {
5243         struct cfg80211_sched_scan_request *request;
5244         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5245         struct net_device *dev = info->user_ptr[1];
5246         struct nlattr *attr;
5247         struct wiphy *wiphy;
5248         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5249         u32 interval;
5250         enum ieee80211_band band;
5251         size_t ie_len;
5252         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5253
5254         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5255             !rdev->ops->sched_scan_start)
5256                 return -EOPNOTSUPP;
5257
5258         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5259                 return -EINVAL;
5260
5261         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5262                 return -EINVAL;
5263
5264         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5265         if (interval == 0)
5266                 return -EINVAL;
5267
5268         wiphy = &rdev->wiphy;
5269
5270         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5271                 n_channels = validate_scan_freqs(
5272                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5273                 if (!n_channels)
5274                         return -EINVAL;
5275         } else {
5276                 n_channels = 0;
5277
5278                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5279                         if (wiphy->bands[band])
5280                                 n_channels += wiphy->bands[band]->n_channels;
5281         }
5282
5283         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5284                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5285                                     tmp)
5286                         n_ssids++;
5287
5288         if (n_ssids > wiphy->max_sched_scan_ssids)
5289                 return -EINVAL;
5290
5291         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5292                 nla_for_each_nested(attr,
5293                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5294                                     tmp)
5295                         n_match_sets++;
5296
5297         if (n_match_sets > wiphy->max_match_sets)
5298                 return -EINVAL;
5299
5300         if (info->attrs[NL80211_ATTR_IE])
5301                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5302         else
5303                 ie_len = 0;
5304
5305         if (ie_len > wiphy->max_sched_scan_ie_len)
5306                 return -EINVAL;
5307
5308         mutex_lock(&rdev->sched_scan_mtx);
5309
5310         if (rdev->sched_scan_req) {
5311                 err = -EINPROGRESS;
5312                 goto out;
5313         }
5314
5315         request = kzalloc(sizeof(*request)
5316                         + sizeof(*request->ssids) * n_ssids
5317                         + sizeof(*request->match_sets) * n_match_sets
5318                         + sizeof(*request->channels) * n_channels
5319                         + ie_len, GFP_KERNEL);
5320         if (!request) {
5321                 err = -ENOMEM;
5322                 goto out;
5323         }
5324
5325         if (n_ssids)
5326                 request->ssids = (void *)&request->channels[n_channels];
5327         request->n_ssids = n_ssids;
5328         if (ie_len) {
5329                 if (request->ssids)
5330                         request->ie = (void *)(request->ssids + n_ssids);
5331                 else
5332                         request->ie = (void *)(request->channels + n_channels);
5333         }
5334
5335         if (n_match_sets) {
5336                 if (request->ie)
5337                         request->match_sets = (void *)(request->ie + ie_len);
5338                 else if (request->ssids)
5339                         request->match_sets =
5340                                 (void *)(request->ssids + n_ssids);
5341                 else
5342                         request->match_sets =
5343                                 (void *)(request->channels + n_channels);
5344         }
5345         request->n_match_sets = n_match_sets;
5346
5347         i = 0;
5348         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5349                 /* user specified, bail out if channel not found */
5350                 nla_for_each_nested(attr,
5351                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5352                                     tmp) {
5353                         struct ieee80211_channel *chan;
5354
5355                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5356
5357                         if (!chan) {
5358                                 err = -EINVAL;
5359                                 goto out_free;
5360                         }
5361
5362                         /* ignore disabled channels */
5363                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5364                                 continue;
5365
5366                         request->channels[i] = chan;
5367                         i++;
5368                 }
5369         } else {
5370                 /* all channels */
5371                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5372                         int j;
5373                         if (!wiphy->bands[band])
5374                                 continue;
5375                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5376                                 struct ieee80211_channel *chan;
5377
5378                                 chan = &wiphy->bands[band]->channels[j];
5379
5380                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5381                                         continue;
5382
5383                                 request->channels[i] = chan;
5384                                 i++;
5385                         }
5386                 }
5387         }
5388
5389         if (!i) {
5390                 err = -EINVAL;
5391                 goto out_free;
5392         }
5393
5394         request->n_channels = i;
5395
5396         i = 0;
5397         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5398                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5399                                     tmp) {
5400                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5401                                 err = -EINVAL;
5402                                 goto out_free;
5403                         }
5404                         request->ssids[i].ssid_len = nla_len(attr);
5405                         memcpy(request->ssids[i].ssid, nla_data(attr),
5406                                nla_len(attr));
5407                         i++;
5408                 }
5409         }
5410
5411         i = 0;
5412         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5413                 nla_for_each_nested(attr,
5414                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5415                                     tmp) {
5416                         struct nlattr *ssid, *rssi;
5417
5418                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5419                                   nla_data(attr), nla_len(attr),
5420                                   nl80211_match_policy);
5421                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5422                         if (ssid) {
5423                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5424                                         err = -EINVAL;
5425                                         goto out_free;
5426                                 }
5427                                 memcpy(request->match_sets[i].ssid.ssid,
5428                                        nla_data(ssid), nla_len(ssid));
5429                                 request->match_sets[i].ssid.ssid_len =
5430                                         nla_len(ssid);
5431                         }
5432                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5433                         if (rssi)
5434                                 request->rssi_thold = nla_get_u32(rssi);
5435                         else
5436                                 request->rssi_thold =
5437                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5438                         i++;
5439                 }
5440         }
5441
5442         if (info->attrs[NL80211_ATTR_IE]) {
5443                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5444                 memcpy((void *)request->ie,
5445                        nla_data(info->attrs[NL80211_ATTR_IE]),
5446                        request->ie_len);
5447         }
5448
5449         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5450                 request->flags = nla_get_u32(
5451                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5452                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5453                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5454                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5455                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5456                         err = -EOPNOTSUPP;
5457                         goto out_free;
5458                 }
5459         }
5460
5461         request->dev = dev;
5462         request->wiphy = &rdev->wiphy;
5463         request->interval = interval;
5464         request->scan_start = jiffies;
5465
5466         err = rdev_sched_scan_start(rdev, dev, request);
5467         if (!err) {
5468                 rdev->sched_scan_req = request;
5469                 nl80211_send_sched_scan(rdev, dev,
5470                                         NL80211_CMD_START_SCHED_SCAN);
5471                 goto out;
5472         }
5473
5474 out_free:
5475         kfree(request);
5476 out:
5477         mutex_unlock(&rdev->sched_scan_mtx);
5478         return err;
5479 }
5480
5481 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5482                                    struct genl_info *info)
5483 {
5484         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5485         int err;
5486
5487         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5488             !rdev->ops->sched_scan_stop)
5489                 return -EOPNOTSUPP;
5490
5491         mutex_lock(&rdev->sched_scan_mtx);
5492         err = __cfg80211_stop_sched_scan(rdev, false);
5493         mutex_unlock(&rdev->sched_scan_mtx);
5494
5495         return err;
5496 }
5497
5498 static int nl80211_start_radar_detection(struct sk_buff *skb,
5499                                          struct genl_info *info)
5500 {
5501         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5502         struct net_device *dev = info->user_ptr[1];
5503         struct wireless_dev *wdev = dev->ieee80211_ptr;
5504         struct cfg80211_chan_def chandef;
5505         int err;
5506
5507         err = nl80211_parse_chandef(rdev, info, &chandef);
5508         if (err)
5509                 return err;
5510
5511         if (wdev->cac_started)
5512                 return -EBUSY;
5513
5514         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5515         if (err < 0)
5516                 return err;
5517
5518         if (err == 0)
5519                 return -EINVAL;
5520
5521         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5522                 return -EINVAL;
5523
5524         if (!rdev->ops->start_radar_detection)
5525                 return -EOPNOTSUPP;
5526
5527         mutex_lock(&rdev->devlist_mtx);
5528         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5529                                            chandef.chan, CHAN_MODE_SHARED,
5530                                            BIT(chandef.width));
5531         if (err)
5532                 goto err_locked;
5533
5534         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5535         if (!err) {
5536                 wdev->channel = chandef.chan;
5537                 wdev->cac_started = true;
5538                 wdev->cac_start_time = jiffies;
5539         }
5540 err_locked:
5541         mutex_unlock(&rdev->devlist_mtx);
5542
5543         return err;
5544 }
5545
5546 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5547                             u32 seq, int flags,
5548                             struct cfg80211_registered_device *rdev,
5549                             struct wireless_dev *wdev,
5550                             struct cfg80211_internal_bss *intbss)
5551 {
5552         struct cfg80211_bss *res = &intbss->pub;
5553         const struct cfg80211_bss_ies *ies;
5554         void *hdr;
5555         struct nlattr *bss;
5556         bool tsf = false;
5557
5558         ASSERT_WDEV_LOCK(wdev);
5559
5560         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5561                              NL80211_CMD_NEW_SCAN_RESULTS);
5562         if (!hdr)
5563                 return -1;
5564
5565         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5566
5567         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5568                 goto nla_put_failure;
5569         if (wdev->netdev &&
5570             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5571                 goto nla_put_failure;
5572         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5573                 goto nla_put_failure;
5574
5575         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5576         if (!bss)
5577                 goto nla_put_failure;
5578         if ((!is_zero_ether_addr(res->bssid) &&
5579              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5580                 goto nla_put_failure;
5581
5582         rcu_read_lock();
5583         ies = rcu_dereference(res->ies);
5584         if (ies) {
5585                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5586                         goto fail_unlock_rcu;
5587                 tsf = true;
5588                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5589                                         ies->len, ies->data))
5590                         goto fail_unlock_rcu;
5591         }
5592         ies = rcu_dereference(res->beacon_ies);
5593         if (ies) {
5594                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5595                         goto fail_unlock_rcu;
5596                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5597                                         ies->len, ies->data))
5598                         goto fail_unlock_rcu;
5599         }
5600         rcu_read_unlock();
5601
5602         if (res->beacon_interval &&
5603             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5604                 goto nla_put_failure;
5605         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5606             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5607             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5608                         jiffies_to_msecs(jiffies - intbss->ts)))
5609                 goto nla_put_failure;
5610
5611         switch (rdev->wiphy.signal_type) {
5612         case CFG80211_SIGNAL_TYPE_MBM:
5613                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5614                         goto nla_put_failure;
5615                 break;
5616         case CFG80211_SIGNAL_TYPE_UNSPEC:
5617                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5618                         goto nla_put_failure;
5619                 break;
5620         default:
5621                 break;
5622         }
5623
5624         switch (wdev->iftype) {
5625         case NL80211_IFTYPE_P2P_CLIENT:
5626         case NL80211_IFTYPE_STATION:
5627                 if (intbss == wdev->current_bss &&
5628                     nla_put_u32(msg, NL80211_BSS_STATUS,
5629                                 NL80211_BSS_STATUS_ASSOCIATED))
5630                         goto nla_put_failure;
5631                 break;
5632         case NL80211_IFTYPE_ADHOC:
5633                 if (intbss == wdev->current_bss &&
5634                     nla_put_u32(msg, NL80211_BSS_STATUS,
5635                                 NL80211_BSS_STATUS_IBSS_JOINED))
5636                         goto nla_put_failure;
5637                 break;
5638         default:
5639                 break;
5640         }
5641
5642         nla_nest_end(msg, bss);
5643
5644         return genlmsg_end(msg, hdr);
5645
5646  fail_unlock_rcu:
5647         rcu_read_unlock();
5648  nla_put_failure:
5649         genlmsg_cancel(msg, hdr);
5650         return -EMSGSIZE;
5651 }
5652
5653 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5654 {
5655         struct cfg80211_registered_device *rdev;
5656         struct cfg80211_internal_bss *scan;
5657         struct wireless_dev *wdev;
5658         int start = cb->args[2], idx = 0;
5659         int err;
5660
5661         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5662         if (err)
5663                 return err;
5664
5665         wdev_lock(wdev);
5666         spin_lock_bh(&rdev->bss_lock);
5667         cfg80211_bss_expire(rdev);
5668
5669         cb->seq = rdev->bss_generation;
5670
5671         list_for_each_entry(scan, &rdev->bss_list, list) {
5672                 if (++idx <= start)
5673                         continue;
5674                 if (nl80211_send_bss(skb, cb,
5675                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5676                                 rdev, wdev, scan) < 0) {
5677                         idx--;
5678                         break;
5679                 }
5680         }
5681
5682         spin_unlock_bh(&rdev->bss_lock);
5683         wdev_unlock(wdev);
5684
5685         cb->args[2] = idx;
5686         nl80211_finish_wdev_dump(rdev);
5687
5688         return skb->len;
5689 }
5690
5691 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5692                                 int flags, struct net_device *dev,
5693                                 struct survey_info *survey)
5694 {
5695         void *hdr;
5696         struct nlattr *infoattr;
5697
5698         hdr = nl80211hdr_put(msg, portid, seq, flags,
5699                              NL80211_CMD_NEW_SURVEY_RESULTS);
5700         if (!hdr)
5701                 return -ENOMEM;
5702
5703         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5704                 goto nla_put_failure;
5705
5706         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5707         if (!infoattr)
5708                 goto nla_put_failure;
5709
5710         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5711                         survey->channel->center_freq))
5712                 goto nla_put_failure;
5713
5714         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5715             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5716                 goto nla_put_failure;
5717         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5718             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5719                 goto nla_put_failure;
5720         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5721             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5722                         survey->channel_time))
5723                 goto nla_put_failure;
5724         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5725             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5726                         survey->channel_time_busy))
5727                 goto nla_put_failure;
5728         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5729             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5730                         survey->channel_time_ext_busy))
5731                 goto nla_put_failure;
5732         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5733             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5734                         survey->channel_time_rx))
5735                 goto nla_put_failure;
5736         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5737             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5738                         survey->channel_time_tx))
5739                 goto nla_put_failure;
5740
5741         nla_nest_end(msg, infoattr);
5742
5743         return genlmsg_end(msg, hdr);
5744
5745  nla_put_failure:
5746         genlmsg_cancel(msg, hdr);
5747         return -EMSGSIZE;
5748 }
5749
5750 static int nl80211_dump_survey(struct sk_buff *skb,
5751                         struct netlink_callback *cb)
5752 {
5753         struct survey_info survey;
5754         struct cfg80211_registered_device *dev;
5755         struct wireless_dev *wdev;
5756         int survey_idx = cb->args[2];
5757         int res;
5758
5759         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5760         if (res)
5761                 return res;
5762
5763         if (!wdev->netdev) {
5764                 res = -EINVAL;
5765                 goto out_err;
5766         }
5767
5768         if (!dev->ops->dump_survey) {
5769                 res = -EOPNOTSUPP;
5770                 goto out_err;
5771         }
5772
5773         while (1) {
5774                 struct ieee80211_channel *chan;
5775
5776                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5777                 if (res == -ENOENT)
5778                         break;
5779                 if (res)
5780                         goto out_err;
5781
5782                 /* Survey without a channel doesn't make sense */
5783                 if (!survey.channel) {
5784                         res = -EINVAL;
5785                         goto out;
5786                 }
5787
5788                 chan = ieee80211_get_channel(&dev->wiphy,
5789                                              survey.channel->center_freq);
5790                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5791                         survey_idx++;
5792                         continue;
5793                 }
5794
5795                 if (nl80211_send_survey(skb,
5796                                 NETLINK_CB(cb->skb).portid,
5797                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5798                                 wdev->netdev, &survey) < 0)
5799                         goto out;
5800                 survey_idx++;
5801         }
5802
5803  out:
5804         cb->args[2] = survey_idx;
5805         res = skb->len;
5806  out_err:
5807         nl80211_finish_wdev_dump(dev);
5808         return res;
5809 }
5810
5811 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5812 {
5813         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5814                                   NL80211_WPA_VERSION_2));
5815 }
5816
5817 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5818 {
5819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5820         struct net_device *dev = info->user_ptr[1];
5821         struct ieee80211_channel *chan;
5822         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5823         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5824         enum nl80211_auth_type auth_type;
5825         struct key_parse key;
5826         bool local_state_change;
5827
5828         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5829                 return -EINVAL;
5830
5831         if (!info->attrs[NL80211_ATTR_MAC])
5832                 return -EINVAL;
5833
5834         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5835                 return -EINVAL;
5836
5837         if (!info->attrs[NL80211_ATTR_SSID])
5838                 return -EINVAL;
5839
5840         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5841                 return -EINVAL;
5842
5843         err = nl80211_parse_key(info, &key);
5844         if (err)
5845                 return err;
5846
5847         if (key.idx >= 0) {
5848                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5849                         return -EINVAL;
5850                 if (!key.p.key || !key.p.key_len)
5851                         return -EINVAL;
5852                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5853                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5854                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5855                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5856                         return -EINVAL;
5857                 if (key.idx > 4)
5858                         return -EINVAL;
5859         } else {
5860                 key.p.key_len = 0;
5861                 key.p.key = NULL;
5862         }
5863
5864         if (key.idx >= 0) {
5865                 int i;
5866                 bool ok = false;
5867                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5868                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5869                                 ok = true;
5870                                 break;
5871                         }
5872                 }
5873                 if (!ok)
5874                         return -EINVAL;
5875         }
5876
5877         if (!rdev->ops->auth)
5878                 return -EOPNOTSUPP;
5879
5880         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5881             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5882                 return -EOPNOTSUPP;
5883
5884         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5885         chan = ieee80211_get_channel(&rdev->wiphy,
5886                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5887         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5888                 return -EINVAL;
5889
5890         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5891         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5892
5893         if (info->attrs[NL80211_ATTR_IE]) {
5894                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5895                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5896         }
5897
5898         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5899         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5900                 return -EINVAL;
5901
5902         if (auth_type == NL80211_AUTHTYPE_SAE &&
5903             !info->attrs[NL80211_ATTR_SAE_DATA])
5904                 return -EINVAL;
5905
5906         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5907                 if (auth_type != NL80211_AUTHTYPE_SAE)
5908                         return -EINVAL;
5909                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5910                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5911                 /* need to include at least Auth Transaction and Status Code */
5912                 if (sae_data_len < 4)
5913                         return -EINVAL;
5914         }
5915
5916         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5917
5918         /*
5919          * Since we no longer track auth state, ignore
5920          * requests to only change local state.
5921          */
5922         if (local_state_change)
5923                 return 0;
5924
5925         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5926                                   ssid, ssid_len, ie, ie_len,
5927                                   key.p.key, key.p.key_len, key.idx,
5928                                   sae_data, sae_data_len);
5929 }
5930
5931 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5932                                    struct genl_info *info,
5933                                    struct cfg80211_crypto_settings *settings,
5934                                    int cipher_limit)
5935 {
5936         memset(settings, 0, sizeof(*settings));
5937
5938         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5939
5940         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5941                 u16 proto;
5942                 proto = nla_get_u16(
5943                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5944                 settings->control_port_ethertype = cpu_to_be16(proto);
5945                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5946                     proto != ETH_P_PAE)
5947                         return -EINVAL;
5948                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5949                         settings->control_port_no_encrypt = true;
5950         } else
5951                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5952
5953         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5954                 void *data;
5955                 int len, i;
5956
5957                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5958                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5959                 settings->n_ciphers_pairwise = len / sizeof(u32);
5960
5961                 if (len % sizeof(u32))
5962                         return -EINVAL;
5963
5964                 if (settings->n_ciphers_pairwise > cipher_limit)
5965                         return -EINVAL;
5966
5967                 memcpy(settings->ciphers_pairwise, data, len);
5968
5969                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5970                         if (!cfg80211_supported_cipher_suite(
5971                                         &rdev->wiphy,
5972                                         settings->ciphers_pairwise[i]))
5973                                 return -EINVAL;
5974         }
5975
5976         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5977                 settings->cipher_group =
5978                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5979                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5980                                                      settings->cipher_group))
5981                         return -EINVAL;
5982         }
5983
5984         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5985                 settings->wpa_versions =
5986                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5987                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5988                         return -EINVAL;
5989         }
5990
5991         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5992                 void *data;
5993                 int len;
5994
5995                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5996                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5997                 settings->n_akm_suites = len / sizeof(u32);
5998
5999                 if (len % sizeof(u32))
6000                         return -EINVAL;
6001
6002                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6003                         return -EINVAL;
6004
6005                 memcpy(settings->akm_suites, data, len);
6006         }
6007
6008         return 0;
6009 }
6010
6011 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6012 {
6013         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6014         struct net_device *dev = info->user_ptr[1];
6015         struct ieee80211_channel *chan;
6016         struct cfg80211_assoc_request req = {};
6017         const u8 *bssid, *ssid;
6018         int err, ssid_len = 0;
6019
6020         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6021                 return -EINVAL;
6022
6023         if (!info->attrs[NL80211_ATTR_MAC] ||
6024             !info->attrs[NL80211_ATTR_SSID] ||
6025             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6026                 return -EINVAL;
6027
6028         if (!rdev->ops->assoc)
6029                 return -EOPNOTSUPP;
6030
6031         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6032             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6033                 return -EOPNOTSUPP;
6034
6035         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6036
6037         chan = ieee80211_get_channel(&rdev->wiphy,
6038                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6039         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6040                 return -EINVAL;
6041
6042         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6043         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6044
6045         if (info->attrs[NL80211_ATTR_IE]) {
6046                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6047                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6048         }
6049
6050         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6051                 enum nl80211_mfp mfp =
6052                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6053                 if (mfp == NL80211_MFP_REQUIRED)
6054                         req.use_mfp = true;
6055                 else if (mfp != NL80211_MFP_NO)
6056                         return -EINVAL;
6057         }
6058
6059         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6060                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6061
6062         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6063                 req.flags |= ASSOC_REQ_DISABLE_HT;
6064
6065         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6066                 memcpy(&req.ht_capa_mask,
6067                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6068                        sizeof(req.ht_capa_mask));
6069
6070         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6071                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6072                         return -EINVAL;
6073                 memcpy(&req.ht_capa,
6074                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6075                        sizeof(req.ht_capa));
6076         }
6077
6078         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6079                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6080
6081         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6082                 memcpy(&req.vht_capa_mask,
6083                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6084                        sizeof(req.vht_capa_mask));
6085
6086         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6087                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6088                         return -EINVAL;
6089                 memcpy(&req.vht_capa,
6090                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6091                        sizeof(req.vht_capa));
6092         }
6093
6094         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6095         if (!err)
6096                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6097                                           ssid, ssid_len, &req);
6098
6099         return err;
6100 }
6101
6102 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6103 {
6104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6105         struct net_device *dev = info->user_ptr[1];
6106         const u8 *ie = NULL, *bssid;
6107         int ie_len = 0;
6108         u16 reason_code;
6109         bool local_state_change;
6110
6111         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6112                 return -EINVAL;
6113
6114         if (!info->attrs[NL80211_ATTR_MAC])
6115                 return -EINVAL;
6116
6117         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6118                 return -EINVAL;
6119
6120         if (!rdev->ops->deauth)
6121                 return -EOPNOTSUPP;
6122
6123         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6124             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6125                 return -EOPNOTSUPP;
6126
6127         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6128
6129         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6130         if (reason_code == 0) {
6131                 /* Reason Code 0 is reserved */
6132                 return -EINVAL;
6133         }
6134
6135         if (info->attrs[NL80211_ATTR_IE]) {
6136                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6137                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6138         }
6139
6140         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6141
6142         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6143                                     local_state_change);
6144 }
6145
6146 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6147 {
6148         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6149         struct net_device *dev = info->user_ptr[1];
6150         const u8 *ie = NULL, *bssid;
6151         int ie_len = 0;
6152         u16 reason_code;
6153         bool local_state_change;
6154
6155         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6156                 return -EINVAL;
6157
6158         if (!info->attrs[NL80211_ATTR_MAC])
6159                 return -EINVAL;
6160
6161         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6162                 return -EINVAL;
6163
6164         if (!rdev->ops->disassoc)
6165                 return -EOPNOTSUPP;
6166
6167         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6168             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6169                 return -EOPNOTSUPP;
6170
6171         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6172
6173         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6174         if (reason_code == 0) {
6175                 /* Reason Code 0 is reserved */
6176                 return -EINVAL;
6177         }
6178
6179         if (info->attrs[NL80211_ATTR_IE]) {
6180                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6181                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6182         }
6183
6184         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6185
6186         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6187                                       local_state_change);
6188 }
6189
6190 static bool
6191 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6192                          int mcast_rate[IEEE80211_NUM_BANDS],
6193                          int rateval)
6194 {
6195         struct wiphy *wiphy = &rdev->wiphy;
6196         bool found = false;
6197         int band, i;
6198
6199         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6200                 struct ieee80211_supported_band *sband;
6201
6202                 sband = wiphy->bands[band];
6203                 if (!sband)
6204                         continue;
6205
6206                 for (i = 0; i < sband->n_bitrates; i++) {
6207                         if (sband->bitrates[i].bitrate == rateval) {
6208                                 mcast_rate[band] = i + 1;
6209                                 found = true;
6210                                 break;
6211                         }
6212                 }
6213         }
6214
6215         return found;
6216 }
6217
6218 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6219 {
6220         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6221         struct net_device *dev = info->user_ptr[1];
6222         struct cfg80211_ibss_params ibss;
6223         struct wiphy *wiphy;
6224         struct cfg80211_cached_keys *connkeys = NULL;
6225         int err;
6226
6227         memset(&ibss, 0, sizeof(ibss));
6228
6229         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6230                 return -EINVAL;
6231
6232         if (!info->attrs[NL80211_ATTR_SSID] ||
6233             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6234                 return -EINVAL;
6235
6236         ibss.beacon_interval = 100;
6237
6238         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6239                 ibss.beacon_interval =
6240                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6241                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6242                         return -EINVAL;
6243         }
6244
6245         if (!rdev->ops->join_ibss)
6246                 return -EOPNOTSUPP;
6247
6248         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6249                 return -EOPNOTSUPP;
6250
6251         wiphy = &rdev->wiphy;
6252
6253         if (info->attrs[NL80211_ATTR_MAC]) {
6254                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6255
6256                 if (!is_valid_ether_addr(ibss.bssid))
6257                         return -EINVAL;
6258         }
6259         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6260         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6261
6262         if (info->attrs[NL80211_ATTR_IE]) {
6263                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6264                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6265         }
6266
6267         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6268         if (err)
6269                 return err;
6270
6271         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6272                 return -EINVAL;
6273
6274         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
6275                 return -EINVAL;
6276         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
6277             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
6278                 return -EINVAL;
6279
6280         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6281         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6282
6283         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6284                 u8 *rates =
6285                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6286                 int n_rates =
6287                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6288                 struct ieee80211_supported_band *sband =
6289                         wiphy->bands[ibss.chandef.chan->band];
6290
6291                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6292                                              &ibss.basic_rates);
6293                 if (err)
6294                         return err;
6295         }
6296
6297         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6298             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6299                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6300                 return -EINVAL;
6301
6302         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6303                 bool no_ht = false;
6304
6305                 connkeys = nl80211_parse_connkeys(rdev,
6306                                           info->attrs[NL80211_ATTR_KEYS],
6307                                           &no_ht);
6308                 if (IS_ERR(connkeys))
6309                         return PTR_ERR(connkeys);
6310
6311                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6312                     no_ht) {
6313                         kfree(connkeys);
6314                         return -EINVAL;
6315                 }
6316         }
6317
6318         ibss.control_port =
6319                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6320
6321         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6322         if (err)
6323                 kfree(connkeys);
6324         return err;
6325 }
6326
6327 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6328 {
6329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6330         struct net_device *dev = info->user_ptr[1];
6331
6332         if (!rdev->ops->leave_ibss)
6333                 return -EOPNOTSUPP;
6334
6335         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6336                 return -EOPNOTSUPP;
6337
6338         return cfg80211_leave_ibss(rdev, dev, false);
6339 }
6340
6341 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6342 {
6343         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6344         struct net_device *dev = info->user_ptr[1];
6345         int mcast_rate[IEEE80211_NUM_BANDS];
6346         u32 nla_rate;
6347         int err;
6348
6349         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6350             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6351                 return -EOPNOTSUPP;
6352
6353         if (!rdev->ops->set_mcast_rate)
6354                 return -EOPNOTSUPP;
6355
6356         memset(mcast_rate, 0, sizeof(mcast_rate));
6357
6358         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6359                 return -EINVAL;
6360
6361         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6362         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6363                 return -EINVAL;
6364
6365         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6366
6367         return err;
6368 }
6369
6370
6371 #ifdef CONFIG_NL80211_TESTMODE
6372 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6373         .name = "testmode",
6374 };
6375
6376 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6377 {
6378         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6379         int err;
6380
6381         if (!info->attrs[NL80211_ATTR_TESTDATA])
6382                 return -EINVAL;
6383
6384         err = -EOPNOTSUPP;
6385         if (rdev->ops->testmode_cmd) {
6386                 rdev->testmode_info = info;
6387                 err = rdev_testmode_cmd(rdev,
6388                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6389                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6390                 rdev->testmode_info = NULL;
6391         }
6392
6393         return err;
6394 }
6395
6396 static int nl80211_testmode_dump(struct sk_buff *skb,
6397                                  struct netlink_callback *cb)
6398 {
6399         struct cfg80211_registered_device *rdev;
6400         int err;
6401         long phy_idx;
6402         void *data = NULL;
6403         int data_len = 0;
6404
6405         if (cb->args[0]) {
6406                 /*
6407                  * 0 is a valid index, but not valid for args[0],
6408                  * so we need to offset by 1.
6409                  */
6410                 phy_idx = cb->args[0] - 1;
6411         } else {
6412                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6413                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6414                                   nl80211_policy);
6415                 if (err)
6416                         return err;
6417
6418                 mutex_lock(&cfg80211_mutex);
6419                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6420                                                   nl80211_fam.attrbuf);
6421                 if (IS_ERR(rdev)) {
6422                         mutex_unlock(&cfg80211_mutex);
6423                         return PTR_ERR(rdev);
6424                 }
6425                 phy_idx = rdev->wiphy_idx;
6426                 rdev = NULL;
6427                 mutex_unlock(&cfg80211_mutex);
6428
6429                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6430                         cb->args[1] =
6431                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6432         }
6433
6434         if (cb->args[1]) {
6435                 data = nla_data((void *)cb->args[1]);
6436                 data_len = nla_len((void *)cb->args[1]);
6437         }
6438
6439         mutex_lock(&cfg80211_mutex);
6440         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6441         if (!rdev) {
6442                 mutex_unlock(&cfg80211_mutex);
6443                 return -ENOENT;
6444         }
6445         cfg80211_lock_rdev(rdev);
6446         mutex_unlock(&cfg80211_mutex);
6447
6448         if (!rdev->ops->testmode_dump) {
6449                 err = -EOPNOTSUPP;
6450                 goto out_err;
6451         }
6452
6453         while (1) {
6454                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6455                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6456                                            NL80211_CMD_TESTMODE);
6457                 struct nlattr *tmdata;
6458
6459                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6460                         genlmsg_cancel(skb, hdr);
6461                         break;
6462                 }
6463
6464                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6465                 if (!tmdata) {
6466                         genlmsg_cancel(skb, hdr);
6467                         break;
6468                 }
6469                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6470                 nla_nest_end(skb, tmdata);
6471
6472                 if (err == -ENOBUFS || err == -ENOENT) {
6473                         genlmsg_cancel(skb, hdr);
6474                         break;
6475                 } else if (err) {
6476                         genlmsg_cancel(skb, hdr);
6477                         goto out_err;
6478                 }
6479
6480                 genlmsg_end(skb, hdr);
6481         }
6482
6483         err = skb->len;
6484         /* see above */
6485         cb->args[0] = phy_idx + 1;
6486  out_err:
6487         cfg80211_unlock_rdev(rdev);
6488         return err;
6489 }
6490
6491 static struct sk_buff *
6492 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6493                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6494 {
6495         struct sk_buff *skb;
6496         void *hdr;
6497         struct nlattr *data;
6498
6499         skb = nlmsg_new(approxlen + 100, gfp);
6500         if (!skb)
6501                 return NULL;
6502
6503         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6504         if (!hdr) {
6505                 kfree_skb(skb);
6506                 return NULL;
6507         }
6508
6509         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6510                 goto nla_put_failure;
6511         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6512
6513         ((void **)skb->cb)[0] = rdev;
6514         ((void **)skb->cb)[1] = hdr;
6515         ((void **)skb->cb)[2] = data;
6516
6517         return skb;
6518
6519  nla_put_failure:
6520         kfree_skb(skb);
6521         return NULL;
6522 }
6523
6524 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6525                                                   int approxlen)
6526 {
6527         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6528
6529         if (WARN_ON(!rdev->testmode_info))
6530                 return NULL;
6531
6532         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6533                                 rdev->testmode_info->snd_portid,
6534                                 rdev->testmode_info->snd_seq,
6535                                 GFP_KERNEL);
6536 }
6537 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6538
6539 int cfg80211_testmode_reply(struct sk_buff *skb)
6540 {
6541         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6542         void *hdr = ((void **)skb->cb)[1];
6543         struct nlattr *data = ((void **)skb->cb)[2];
6544
6545         if (WARN_ON(!rdev->testmode_info)) {
6546                 kfree_skb(skb);
6547                 return -EINVAL;
6548         }
6549
6550         nla_nest_end(skb, data);
6551         genlmsg_end(skb, hdr);
6552         return genlmsg_reply(skb, rdev->testmode_info);
6553 }
6554 EXPORT_SYMBOL(cfg80211_testmode_reply);
6555
6556 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6557                                                   int approxlen, gfp_t gfp)
6558 {
6559         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6560
6561         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6562 }
6563 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6564
6565 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6566 {
6567         void *hdr = ((void **)skb->cb)[1];
6568         struct nlattr *data = ((void **)skb->cb)[2];
6569
6570         nla_nest_end(skb, data);
6571         genlmsg_end(skb, hdr);
6572         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6573 }
6574 EXPORT_SYMBOL(cfg80211_testmode_event);
6575 #endif
6576
6577 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6578 {
6579         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6580         struct net_device *dev = info->user_ptr[1];
6581         struct cfg80211_connect_params connect;
6582         struct wiphy *wiphy;
6583         struct cfg80211_cached_keys *connkeys = NULL;
6584         int err;
6585
6586         memset(&connect, 0, sizeof(connect));
6587
6588         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6589                 return -EINVAL;
6590
6591         if (!info->attrs[NL80211_ATTR_SSID] ||
6592             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6593                 return -EINVAL;
6594
6595         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6596                 connect.auth_type =
6597                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6598                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6599                                              NL80211_CMD_CONNECT))
6600                         return -EINVAL;
6601         } else
6602                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6603
6604         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6605
6606         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6607                                       NL80211_MAX_NR_CIPHER_SUITES);
6608         if (err)
6609                 return err;
6610
6611         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6612             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6613                 return -EOPNOTSUPP;
6614
6615         wiphy = &rdev->wiphy;
6616
6617         connect.bg_scan_period = -1;
6618         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6619                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6620                 connect.bg_scan_period =
6621                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6622         }
6623
6624         if (info->attrs[NL80211_ATTR_MAC])
6625                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6626         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6627         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6628
6629         if (info->attrs[NL80211_ATTR_IE]) {
6630                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6631                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6632         }
6633
6634         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6635                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6636                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6637                     connect.mfp != NL80211_MFP_NO)
6638                         return -EINVAL;
6639         } else {
6640                 connect.mfp = NL80211_MFP_NO;
6641         }
6642
6643         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6644                 connect.channel =
6645                         ieee80211_get_channel(wiphy,
6646                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6647                 if (!connect.channel ||
6648                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6649                         return -EINVAL;
6650         }
6651
6652         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6653                 connkeys = nl80211_parse_connkeys(rdev,
6654                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6655                 if (IS_ERR(connkeys))
6656                         return PTR_ERR(connkeys);
6657         }
6658
6659         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6660                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6661
6662         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6663                 memcpy(&connect.ht_capa_mask,
6664                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6665                        sizeof(connect.ht_capa_mask));
6666
6667         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6668                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6669                         kfree(connkeys);
6670                         return -EINVAL;
6671                 }
6672                 memcpy(&connect.ht_capa,
6673                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6674                        sizeof(connect.ht_capa));
6675         }
6676
6677         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6678                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6679
6680         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6681                 memcpy(&connect.vht_capa_mask,
6682                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6683                        sizeof(connect.vht_capa_mask));
6684
6685         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6686                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6687                         kfree(connkeys);
6688                         return -EINVAL;
6689                 }
6690                 memcpy(&connect.vht_capa,
6691                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6692                        sizeof(connect.vht_capa));
6693         }
6694
6695         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6696         if (err)
6697                 kfree(connkeys);
6698         return err;
6699 }
6700
6701 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6702 {
6703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6704         struct net_device *dev = info->user_ptr[1];
6705         u16 reason;
6706
6707         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6708                 reason = WLAN_REASON_DEAUTH_LEAVING;
6709         else
6710                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6711
6712         if (reason == 0)
6713                 return -EINVAL;
6714
6715         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6716             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6717                 return -EOPNOTSUPP;
6718
6719         return cfg80211_disconnect(rdev, dev, reason, true);
6720 }
6721
6722 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6723 {
6724         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6725         struct net *net;
6726         int err;
6727         u32 pid;
6728
6729         if (!info->attrs[NL80211_ATTR_PID])
6730                 return -EINVAL;
6731
6732         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6733
6734         net = get_net_ns_by_pid(pid);
6735         if (IS_ERR(net))
6736                 return PTR_ERR(net);
6737
6738         err = 0;
6739
6740         /* check if anything to do */
6741         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6742                 err = cfg80211_switch_netns(rdev, net);
6743
6744         put_net(net);
6745         return err;
6746 }
6747
6748 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6749 {
6750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6751         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6752                         struct cfg80211_pmksa *pmksa) = NULL;
6753         struct net_device *dev = info->user_ptr[1];
6754         struct cfg80211_pmksa pmksa;
6755
6756         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6757
6758         if (!info->attrs[NL80211_ATTR_MAC])
6759                 return -EINVAL;
6760
6761         if (!info->attrs[NL80211_ATTR_PMKID])
6762                 return -EINVAL;
6763
6764         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6765         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6766
6767         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6768             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6769                 return -EOPNOTSUPP;
6770
6771         switch (info->genlhdr->cmd) {
6772         case NL80211_CMD_SET_PMKSA:
6773                 rdev_ops = rdev->ops->set_pmksa;
6774                 break;
6775         case NL80211_CMD_DEL_PMKSA:
6776                 rdev_ops = rdev->ops->del_pmksa;
6777                 break;
6778         default:
6779                 WARN_ON(1);
6780                 break;
6781         }
6782
6783         if (!rdev_ops)
6784                 return -EOPNOTSUPP;
6785
6786         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6787 }
6788
6789 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6790 {
6791         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6792         struct net_device *dev = info->user_ptr[1];
6793
6794         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6795             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6796                 return -EOPNOTSUPP;
6797
6798         if (!rdev->ops->flush_pmksa)
6799                 return -EOPNOTSUPP;
6800
6801         return rdev_flush_pmksa(rdev, dev);
6802 }
6803
6804 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6805 {
6806         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6807         struct net_device *dev = info->user_ptr[1];
6808         u8 action_code, dialog_token;
6809         u16 status_code;
6810         u8 *peer;
6811
6812         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6813             !rdev->ops->tdls_mgmt)
6814                 return -EOPNOTSUPP;
6815
6816         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6817             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6818             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6819             !info->attrs[NL80211_ATTR_IE] ||
6820             !info->attrs[NL80211_ATTR_MAC])
6821                 return -EINVAL;
6822
6823         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6824         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6825         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6826         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6827
6828         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6829                               dialog_token, status_code,
6830                               nla_data(info->attrs[NL80211_ATTR_IE]),
6831                               nla_len(info->attrs[NL80211_ATTR_IE]));
6832 }
6833
6834 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6835 {
6836         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6837         struct net_device *dev = info->user_ptr[1];
6838         enum nl80211_tdls_operation operation;
6839         u8 *peer;
6840
6841         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6842             !rdev->ops->tdls_oper)
6843                 return -EOPNOTSUPP;
6844
6845         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6846             !info->attrs[NL80211_ATTR_MAC])
6847                 return -EINVAL;
6848
6849         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6850         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6851
6852         return rdev_tdls_oper(rdev, dev, peer, operation);
6853 }
6854
6855 static int nl80211_remain_on_channel(struct sk_buff *skb,
6856                                      struct genl_info *info)
6857 {
6858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6859         struct wireless_dev *wdev = info->user_ptr[1];
6860         struct cfg80211_chan_def chandef;
6861         struct sk_buff *msg;
6862         void *hdr;
6863         u64 cookie;
6864         u32 duration;
6865         int err;
6866
6867         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6868             !info->attrs[NL80211_ATTR_DURATION])
6869                 return -EINVAL;
6870
6871         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6872
6873         if (!rdev->ops->remain_on_channel ||
6874             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6875                 return -EOPNOTSUPP;
6876
6877         /*
6878          * We should be on that channel for at least a minimum amount of
6879          * time (10ms) but no longer than the driver supports.
6880          */
6881         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6882             duration > rdev->wiphy.max_remain_on_channel_duration)
6883                 return -EINVAL;
6884
6885         err = nl80211_parse_chandef(rdev, info, &chandef);
6886         if (err)
6887                 return err;
6888
6889         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6890         if (!msg)
6891                 return -ENOMEM;
6892
6893         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6894                              NL80211_CMD_REMAIN_ON_CHANNEL);
6895
6896         if (IS_ERR(hdr)) {
6897                 err = PTR_ERR(hdr);
6898                 goto free_msg;
6899         }
6900
6901         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6902                                      duration, &cookie);
6903
6904         if (err)
6905                 goto free_msg;
6906
6907         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6908                 goto nla_put_failure;
6909
6910         genlmsg_end(msg, hdr);
6911
6912         return genlmsg_reply(msg, info);
6913
6914  nla_put_failure:
6915         err = -ENOBUFS;
6916  free_msg:
6917         nlmsg_free(msg);
6918         return err;
6919 }
6920
6921 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6922                                             struct genl_info *info)
6923 {
6924         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6925         struct wireless_dev *wdev = info->user_ptr[1];
6926         u64 cookie;
6927
6928         if (!info->attrs[NL80211_ATTR_COOKIE])
6929                 return -EINVAL;
6930
6931         if (!rdev->ops->cancel_remain_on_channel)
6932                 return -EOPNOTSUPP;
6933
6934         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6935
6936         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6937 }
6938
6939 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6940                            u8 *rates, u8 rates_len)
6941 {
6942         u8 i;
6943         u32 mask = 0;
6944
6945         for (i = 0; i < rates_len; i++) {
6946                 int rate = (rates[i] & 0x7f) * 5;
6947                 int ridx;
6948                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6949                         struct ieee80211_rate *srate =
6950                                 &sband->bitrates[ridx];
6951                         if (rate == srate->bitrate) {
6952                                 mask |= 1 << ridx;
6953                                 break;
6954                         }
6955                 }
6956                 if (ridx == sband->n_bitrates)
6957                         return 0; /* rate not found */
6958         }
6959
6960         return mask;
6961 }
6962
6963 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6964                                u8 *rates, u8 rates_len,
6965                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6966 {
6967         u8 i;
6968
6969         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6970
6971         for (i = 0; i < rates_len; i++) {
6972                 int ridx, rbit;
6973
6974                 ridx = rates[i] / 8;
6975                 rbit = BIT(rates[i] % 8);
6976
6977                 /* check validity */
6978                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6979                         return false;
6980
6981                 /* check availability */
6982                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6983                         mcs[ridx] |= rbit;
6984                 else
6985                         return false;
6986         }
6987
6988         return true;
6989 }
6990
6991 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6992         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6993                                     .len = NL80211_MAX_SUPP_RATES },
6994         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6995                                  .len = NL80211_MAX_SUPP_HT_RATES },
6996 };
6997
6998 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6999                                        struct genl_info *info)
7000 {
7001         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7002         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7003         struct cfg80211_bitrate_mask mask;
7004         int rem, i;
7005         struct net_device *dev = info->user_ptr[1];
7006         struct nlattr *tx_rates;
7007         struct ieee80211_supported_band *sband;
7008
7009         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7010                 return -EINVAL;
7011
7012         if (!rdev->ops->set_bitrate_mask)
7013                 return -EOPNOTSUPP;
7014
7015         memset(&mask, 0, sizeof(mask));
7016         /* Default to all rates enabled */
7017         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7018                 sband = rdev->wiphy.bands[i];
7019                 mask.control[i].legacy =
7020                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7021                 if (sband)
7022                         memcpy(mask.control[i].mcs,
7023                                sband->ht_cap.mcs.rx_mask,
7024                                sizeof(mask.control[i].mcs));
7025                 else
7026                         memset(mask.control[i].mcs, 0,
7027                                sizeof(mask.control[i].mcs));
7028         }
7029
7030         /*
7031          * The nested attribute uses enum nl80211_band as the index. This maps
7032          * directly to the enum ieee80211_band values used in cfg80211.
7033          */
7034         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7035         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7036         {
7037                 enum ieee80211_band band = nla_type(tx_rates);
7038                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7039                         return -EINVAL;
7040                 sband = rdev->wiphy.bands[band];
7041                 if (sband == NULL)
7042                         return -EINVAL;
7043                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7044                           nla_len(tx_rates), nl80211_txattr_policy);
7045                 if (tb[NL80211_TXRATE_LEGACY]) {
7046                         mask.control[band].legacy = rateset_to_mask(
7047                                 sband,
7048                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7049                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7050                         if ((mask.control[band].legacy == 0) &&
7051                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7052                                 return -EINVAL;
7053                 }
7054                 if (tb[NL80211_TXRATE_MCS]) {
7055                         if (!ht_rateset_to_mask(
7056                                         sband,
7057                                         nla_data(tb[NL80211_TXRATE_MCS]),
7058                                         nla_len(tb[NL80211_TXRATE_MCS]),
7059                                         mask.control[band].mcs))
7060                                 return -EINVAL;
7061                 }
7062
7063                 if (mask.control[band].legacy == 0) {
7064                         /* don't allow empty legacy rates if HT
7065                          * is not even supported. */
7066                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7067                                 return -EINVAL;
7068
7069                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7070                                 if (mask.control[band].mcs[i])
7071                                         break;
7072
7073                         /* legacy and mcs rates may not be both empty */
7074                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7075                                 return -EINVAL;
7076                 }
7077         }
7078
7079         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7080 }
7081
7082 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7083 {
7084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7085         struct wireless_dev *wdev = info->user_ptr[1];
7086         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7087
7088         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7089                 return -EINVAL;
7090
7091         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7092                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7093
7094         switch (wdev->iftype) {
7095         case NL80211_IFTYPE_STATION:
7096         case NL80211_IFTYPE_ADHOC:
7097         case NL80211_IFTYPE_P2P_CLIENT:
7098         case NL80211_IFTYPE_AP:
7099         case NL80211_IFTYPE_AP_VLAN:
7100         case NL80211_IFTYPE_MESH_POINT:
7101         case NL80211_IFTYPE_P2P_GO:
7102         case NL80211_IFTYPE_P2P_DEVICE:
7103                 break;
7104         default:
7105                 return -EOPNOTSUPP;
7106         }
7107
7108         /* not much point in registering if we can't reply */
7109         if (!rdev->ops->mgmt_tx)
7110                 return -EOPNOTSUPP;
7111
7112         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7113                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7114                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7115 }
7116
7117 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7118 {
7119         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7120         struct wireless_dev *wdev = info->user_ptr[1];
7121         struct cfg80211_chan_def chandef;
7122         int err;
7123         void *hdr = NULL;
7124         u64 cookie;
7125         struct sk_buff *msg = NULL;
7126         unsigned int wait = 0;
7127         bool offchan, no_cck, dont_wait_for_ack;
7128
7129         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7130
7131         if (!info->attrs[NL80211_ATTR_FRAME])
7132                 return -EINVAL;
7133
7134         if (!rdev->ops->mgmt_tx)
7135                 return -EOPNOTSUPP;
7136
7137         switch (wdev->iftype) {
7138         case NL80211_IFTYPE_STATION:
7139         case NL80211_IFTYPE_ADHOC:
7140         case NL80211_IFTYPE_P2P_CLIENT:
7141         case NL80211_IFTYPE_AP:
7142         case NL80211_IFTYPE_AP_VLAN:
7143         case NL80211_IFTYPE_MESH_POINT:
7144         case NL80211_IFTYPE_P2P_GO:
7145         case NL80211_IFTYPE_P2P_DEVICE:
7146                 break;
7147         default:
7148                 return -EOPNOTSUPP;
7149         }
7150
7151         if (info->attrs[NL80211_ATTR_DURATION]) {
7152                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7153                         return -EINVAL;
7154                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7155
7156                 /*
7157                  * We should wait on the channel for at least a minimum amount
7158                  * of time (10ms) but no longer than the driver supports.
7159                  */
7160                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7161                     wait > rdev->wiphy.max_remain_on_channel_duration)
7162                         return -EINVAL;
7163
7164         }
7165
7166         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7167
7168         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7169                 return -EINVAL;
7170
7171         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7172
7173         err = nl80211_parse_chandef(rdev, info, &chandef);
7174         if (err)
7175                 return err;
7176
7177         if (!dont_wait_for_ack) {
7178                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7179                 if (!msg)
7180                         return -ENOMEM;
7181
7182                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7183                                      NL80211_CMD_FRAME);
7184
7185                 if (IS_ERR(hdr)) {
7186                         err = PTR_ERR(hdr);
7187                         goto free_msg;
7188                 }
7189         }
7190
7191         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7192                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7193                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7194                                     no_cck, dont_wait_for_ack, &cookie);
7195         if (err)
7196                 goto free_msg;
7197
7198         if (msg) {
7199                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7200                         goto nla_put_failure;
7201
7202                 genlmsg_end(msg, hdr);
7203                 return genlmsg_reply(msg, info);
7204         }
7205
7206         return 0;
7207
7208  nla_put_failure:
7209         err = -ENOBUFS;
7210  free_msg:
7211         nlmsg_free(msg);
7212         return err;
7213 }
7214
7215 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7216 {
7217         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7218         struct wireless_dev *wdev = info->user_ptr[1];
7219         u64 cookie;
7220
7221         if (!info->attrs[NL80211_ATTR_COOKIE])
7222                 return -EINVAL;
7223
7224         if (!rdev->ops->mgmt_tx_cancel_wait)
7225                 return -EOPNOTSUPP;
7226
7227         switch (wdev->iftype) {
7228         case NL80211_IFTYPE_STATION:
7229         case NL80211_IFTYPE_ADHOC:
7230         case NL80211_IFTYPE_P2P_CLIENT:
7231         case NL80211_IFTYPE_AP:
7232         case NL80211_IFTYPE_AP_VLAN:
7233         case NL80211_IFTYPE_P2P_GO:
7234         case NL80211_IFTYPE_P2P_DEVICE:
7235                 break;
7236         default:
7237                 return -EOPNOTSUPP;
7238         }
7239
7240         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7241
7242         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7243 }
7244
7245 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7246 {
7247         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7248         struct wireless_dev *wdev;
7249         struct net_device *dev = info->user_ptr[1];
7250         u8 ps_state;
7251         bool state;
7252         int err;
7253
7254         if (!info->attrs[NL80211_ATTR_PS_STATE])
7255                 return -EINVAL;
7256
7257         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7258
7259         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7260                 return -EINVAL;
7261
7262         wdev = dev->ieee80211_ptr;
7263
7264         if (!rdev->ops->set_power_mgmt)
7265                 return -EOPNOTSUPP;
7266
7267         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7268
7269         if (state == wdev->ps)
7270                 return 0;
7271
7272         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7273         if (!err)
7274                 wdev->ps = state;
7275         return err;
7276 }
7277
7278 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7279 {
7280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7281         enum nl80211_ps_state ps_state;
7282         struct wireless_dev *wdev;
7283         struct net_device *dev = info->user_ptr[1];
7284         struct sk_buff *msg;
7285         void *hdr;
7286         int err;
7287
7288         wdev = dev->ieee80211_ptr;
7289
7290         if (!rdev->ops->set_power_mgmt)
7291                 return -EOPNOTSUPP;
7292
7293         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7294         if (!msg)
7295                 return -ENOMEM;
7296
7297         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7298                              NL80211_CMD_GET_POWER_SAVE);
7299         if (!hdr) {
7300                 err = -ENOBUFS;
7301                 goto free_msg;
7302         }
7303
7304         if (wdev->ps)
7305                 ps_state = NL80211_PS_ENABLED;
7306         else
7307                 ps_state = NL80211_PS_DISABLED;
7308
7309         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7310                 goto nla_put_failure;
7311
7312         genlmsg_end(msg, hdr);
7313         return genlmsg_reply(msg, info);
7314
7315  nla_put_failure:
7316         err = -ENOBUFS;
7317  free_msg:
7318         nlmsg_free(msg);
7319         return err;
7320 }
7321
7322 static struct nla_policy
7323 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7324         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7325         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7326         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7327         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7328         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7329         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7330 };
7331
7332 static int nl80211_set_cqm_txe(struct genl_info *info,
7333                                u32 rate, u32 pkts, u32 intvl)
7334 {
7335         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7336         struct wireless_dev *wdev;
7337         struct net_device *dev = info->user_ptr[1];
7338
7339         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7340                 return -EINVAL;
7341
7342         wdev = dev->ieee80211_ptr;
7343
7344         if (!rdev->ops->set_cqm_txe_config)
7345                 return -EOPNOTSUPP;
7346
7347         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7348             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7349                 return -EOPNOTSUPP;
7350
7351         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7352 }
7353
7354 static int nl80211_set_cqm_rssi(struct genl_info *info,
7355                                 s32 threshold, u32 hysteresis)
7356 {
7357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7358         struct wireless_dev *wdev;
7359         struct net_device *dev = info->user_ptr[1];
7360
7361         if (threshold > 0)
7362                 return -EINVAL;
7363
7364         wdev = dev->ieee80211_ptr;
7365
7366         if (!rdev->ops->set_cqm_rssi_config)
7367                 return -EOPNOTSUPP;
7368
7369         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7370             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7371                 return -EOPNOTSUPP;
7372
7373         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7374 }
7375
7376 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7377 {
7378         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7379         struct nlattr *cqm;
7380         int err;
7381
7382         cqm = info->attrs[NL80211_ATTR_CQM];
7383         if (!cqm) {
7384                 err = -EINVAL;
7385                 goto out;
7386         }
7387
7388         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7389                                nl80211_attr_cqm_policy);
7390         if (err)
7391                 goto out;
7392
7393         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7394             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7395                 s32 threshold;
7396                 u32 hysteresis;
7397                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7398                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7399                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7400         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7401                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7402                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7403                 u32 rate, pkts, intvl;
7404                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7405                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7406                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7407                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7408         } else
7409                 err = -EINVAL;
7410
7411 out:
7412         return err;
7413 }
7414
7415 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7416 {
7417         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7418         struct net_device *dev = info->user_ptr[1];
7419         struct mesh_config cfg;
7420         struct mesh_setup setup;
7421         int err;
7422
7423         /* start with default */
7424         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7425         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7426
7427         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7428                 /* and parse parameters if given */
7429                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7430                 if (err)
7431                         return err;
7432         }
7433
7434         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7435             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7436                 return -EINVAL;
7437
7438         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7439         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7440
7441         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7442             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7443                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7444                         return -EINVAL;
7445
7446         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7447                 setup.beacon_interval =
7448                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7449                 if (setup.beacon_interval < 10 ||
7450                     setup.beacon_interval > 10000)
7451                         return -EINVAL;
7452         }
7453
7454         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7455                 setup.dtim_period =
7456                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7457                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7458                         return -EINVAL;
7459         }
7460
7461         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7462                 /* parse additional setup parameters if given */
7463                 err = nl80211_parse_mesh_setup(info, &setup);
7464                 if (err)
7465                         return err;
7466         }
7467
7468         if (setup.user_mpm)
7469                 cfg.auto_open_plinks = false;
7470
7471         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7472                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7473                 if (err)
7474                         return err;
7475         } else {
7476                 /* cfg80211_join_mesh() will sort it out */
7477                 setup.chandef.chan = NULL;
7478         }
7479
7480         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7481 }
7482
7483 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7484 {
7485         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7486         struct net_device *dev = info->user_ptr[1];
7487
7488         return cfg80211_leave_mesh(rdev, dev);
7489 }
7490
7491 #ifdef CONFIG_PM
7492 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7493                                         struct cfg80211_registered_device *rdev)
7494 {
7495         struct nlattr *nl_pats, *nl_pat;
7496         int i, pat_len;
7497
7498         if (!rdev->wowlan->n_patterns)
7499                 return 0;
7500
7501         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7502         if (!nl_pats)
7503                 return -ENOBUFS;
7504
7505         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7506                 nl_pat = nla_nest_start(msg, i + 1);
7507                 if (!nl_pat)
7508                         return -ENOBUFS;
7509                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7510                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7511                             DIV_ROUND_UP(pat_len, 8),
7512                             rdev->wowlan->patterns[i].mask) ||
7513                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7514                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7515                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7516                                 rdev->wowlan->patterns[i].pkt_offset))
7517                         return -ENOBUFS;
7518                 nla_nest_end(msg, nl_pat);
7519         }
7520         nla_nest_end(msg, nl_pats);
7521
7522         return 0;
7523 }
7524
7525 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7526                                    struct cfg80211_wowlan_tcp *tcp)
7527 {
7528         struct nlattr *nl_tcp;
7529
7530         if (!tcp)
7531                 return 0;
7532
7533         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7534         if (!nl_tcp)
7535                 return -ENOBUFS;
7536
7537         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7538             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7539             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7540             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7541             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7542             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7543                     tcp->payload_len, tcp->payload) ||
7544             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7545                         tcp->data_interval) ||
7546             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7547                     tcp->wake_len, tcp->wake_data) ||
7548             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7549                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7550                 return -ENOBUFS;
7551
7552         if (tcp->payload_seq.len &&
7553             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7554                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7555                 return -ENOBUFS;
7556
7557         if (tcp->payload_tok.len &&
7558             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7559                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7560                     &tcp->payload_tok))
7561                 return -ENOBUFS;
7562
7563         return 0;
7564 }
7565
7566 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7567 {
7568         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7569         struct sk_buff *msg;
7570         void *hdr;
7571         u32 size = NLMSG_DEFAULT_SIZE;
7572
7573         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7574             !rdev->wiphy.wowlan.tcp)
7575                 return -EOPNOTSUPP;
7576
7577         if (rdev->wowlan && rdev->wowlan->tcp) {
7578                 /* adjust size to have room for all the data */
7579                 size += rdev->wowlan->tcp->tokens_size +
7580                         rdev->wowlan->tcp->payload_len +
7581                         rdev->wowlan->tcp->wake_len +
7582                         rdev->wowlan->tcp->wake_len / 8;
7583         }
7584
7585         msg = nlmsg_new(size, GFP_KERNEL);
7586         if (!msg)
7587                 return -ENOMEM;
7588
7589         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7590                              NL80211_CMD_GET_WOWLAN);
7591         if (!hdr)
7592                 goto nla_put_failure;
7593
7594         if (rdev->wowlan) {
7595                 struct nlattr *nl_wowlan;
7596
7597                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7598                 if (!nl_wowlan)
7599                         goto nla_put_failure;
7600
7601                 if ((rdev->wowlan->any &&
7602                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7603                     (rdev->wowlan->disconnect &&
7604                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7605                     (rdev->wowlan->magic_pkt &&
7606                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7607                     (rdev->wowlan->gtk_rekey_failure &&
7608                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7609                     (rdev->wowlan->eap_identity_req &&
7610                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7611                     (rdev->wowlan->four_way_handshake &&
7612                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7613                     (rdev->wowlan->rfkill_release &&
7614                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7615                         goto nla_put_failure;
7616
7617                 if (nl80211_send_wowlan_patterns(msg, rdev))
7618                         goto nla_put_failure;
7619
7620                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7621                         goto nla_put_failure;
7622
7623                 nla_nest_end(msg, nl_wowlan);
7624         }
7625
7626         genlmsg_end(msg, hdr);
7627         return genlmsg_reply(msg, info);
7628
7629 nla_put_failure:
7630         nlmsg_free(msg);
7631         return -ENOBUFS;
7632 }
7633
7634 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7635                                     struct nlattr *attr,
7636                                     struct cfg80211_wowlan *trig)
7637 {
7638         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7639         struct cfg80211_wowlan_tcp *cfg;
7640         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7641         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7642         u32 size;
7643         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7644         int err, port;
7645
7646         if (!rdev->wiphy.wowlan.tcp)
7647                 return -EINVAL;
7648
7649         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7650                         nla_data(attr), nla_len(attr),
7651                         nl80211_wowlan_tcp_policy);
7652         if (err)
7653                 return err;
7654
7655         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7656             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7657             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7658             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7659             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7660             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7661             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7662             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7663                 return -EINVAL;
7664
7665         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7666         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7667                 return -EINVAL;
7668
7669         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7670                         rdev->wiphy.wowlan.tcp->data_interval_max ||
7671             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7672                 return -EINVAL;
7673
7674         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7675         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7676                 return -EINVAL;
7677
7678         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7679         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7680                 return -EINVAL;
7681
7682         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7683                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7684
7685                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7686                 tokens_size = tokln - sizeof(*tok);
7687
7688                 if (!tok->len || tokens_size % tok->len)
7689                         return -EINVAL;
7690                 if (!rdev->wiphy.wowlan.tcp->tok)
7691                         return -EINVAL;
7692                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7693                         return -EINVAL;
7694                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7695                         return -EINVAL;
7696                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7697                         return -EINVAL;
7698                 if (tok->offset + tok->len > data_size)
7699                         return -EINVAL;
7700         }
7701
7702         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7703                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7704                 if (!rdev->wiphy.wowlan.tcp->seq)
7705                         return -EINVAL;
7706                 if (seq->len == 0 || seq->len > 4)
7707                         return -EINVAL;
7708                 if (seq->len + seq->offset > data_size)
7709                         return -EINVAL;
7710         }
7711
7712         size = sizeof(*cfg);
7713         size += data_size;
7714         size += wake_size + wake_mask_size;
7715         size += tokens_size;
7716
7717         cfg = kzalloc(size, GFP_KERNEL);
7718         if (!cfg)
7719                 return -ENOMEM;
7720         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7721         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7722         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7723                ETH_ALEN);
7724         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7725                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7726         else
7727                 port = 0;
7728 #ifdef CONFIG_INET
7729         /* allocate a socket and port for it and use it */
7730         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7731                             IPPROTO_TCP, &cfg->sock, 1);
7732         if (err) {
7733                 kfree(cfg);
7734                 return err;
7735         }
7736         if (inet_csk_get_port(cfg->sock->sk, port)) {
7737                 sock_release(cfg->sock);
7738                 kfree(cfg);
7739                 return -EADDRINUSE;
7740         }
7741         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7742 #else
7743         if (!port) {
7744                 kfree(cfg);
7745                 return -EINVAL;
7746         }
7747         cfg->src_port = port;
7748 #endif
7749
7750         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7751         cfg->payload_len = data_size;
7752         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7753         memcpy((void *)cfg->payload,
7754                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7755                data_size);
7756         if (seq)
7757                 cfg->payload_seq = *seq;
7758         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7759         cfg->wake_len = wake_size;
7760         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7761         memcpy((void *)cfg->wake_data,
7762                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7763                wake_size);
7764         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7765                          data_size + wake_size;
7766         memcpy((void *)cfg->wake_mask,
7767                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7768                wake_mask_size);
7769         if (tok) {
7770                 cfg->tokens_size = tokens_size;
7771                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7772         }
7773
7774         trig->tcp = cfg;
7775
7776         return 0;
7777 }
7778
7779 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7780 {
7781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7782         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7783         struct cfg80211_wowlan new_triggers = {};
7784         struct cfg80211_wowlan *ntrig;
7785         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7786         int err, i;
7787         bool prev_enabled = rdev->wowlan;
7788
7789         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7790             !rdev->wiphy.wowlan.tcp)
7791                 return -EOPNOTSUPP;
7792
7793         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7794                 cfg80211_rdev_free_wowlan(rdev);
7795                 rdev->wowlan = NULL;
7796                 goto set_wakeup;
7797         }
7798
7799         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7800                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7801                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7802                         nl80211_wowlan_policy);
7803         if (err)
7804                 return err;
7805
7806         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7807                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7808                         return -EINVAL;
7809                 new_triggers.any = true;
7810         }
7811
7812         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7813                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7814                         return -EINVAL;
7815                 new_triggers.disconnect = true;
7816         }
7817
7818         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7819                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7820                         return -EINVAL;
7821                 new_triggers.magic_pkt = true;
7822         }
7823
7824         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7825                 return -EINVAL;
7826
7827         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7828                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7829                         return -EINVAL;
7830                 new_triggers.gtk_rekey_failure = true;
7831         }
7832
7833         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7834                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7835                         return -EINVAL;
7836                 new_triggers.eap_identity_req = true;
7837         }
7838
7839         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7840                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7841                         return -EINVAL;
7842                 new_triggers.four_way_handshake = true;
7843         }
7844
7845         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7846                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7847                         return -EINVAL;
7848                 new_triggers.rfkill_release = true;
7849         }
7850
7851         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7852                 struct nlattr *pat;
7853                 int n_patterns = 0;
7854                 int rem, pat_len, mask_len, pkt_offset;
7855                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7856
7857                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7858                                     rem)
7859                         n_patterns++;
7860                 if (n_patterns > wowlan->n_patterns)
7861                         return -EINVAL;
7862
7863                 new_triggers.patterns = kcalloc(n_patterns,
7864                                                 sizeof(new_triggers.patterns[0]),
7865                                                 GFP_KERNEL);
7866                 if (!new_triggers.patterns)
7867                         return -ENOMEM;
7868
7869                 new_triggers.n_patterns = n_patterns;
7870                 i = 0;
7871
7872                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7873                                     rem) {
7874                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7875                                   nla_data(pat), nla_len(pat), NULL);
7876                         err = -EINVAL;
7877                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7878                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7879                                 goto error;
7880                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7881                         mask_len = DIV_ROUND_UP(pat_len, 8);
7882                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7883                             mask_len)
7884                                 goto error;
7885                         if (pat_len > wowlan->pattern_max_len ||
7886                             pat_len < wowlan->pattern_min_len)
7887                                 goto error;
7888
7889                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7890                                 pkt_offset = 0;
7891                         else
7892                                 pkt_offset = nla_get_u32(
7893                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7894                         if (pkt_offset > wowlan->max_pkt_offset)
7895                                 goto error;
7896                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7897
7898                         new_triggers.patterns[i].mask =
7899                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7900                         if (!new_triggers.patterns[i].mask) {
7901                                 err = -ENOMEM;
7902                                 goto error;
7903                         }
7904                         new_triggers.patterns[i].pattern =
7905                                 new_triggers.patterns[i].mask + mask_len;
7906                         memcpy(new_triggers.patterns[i].mask,
7907                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7908                                mask_len);
7909                         new_triggers.patterns[i].pattern_len = pat_len;
7910                         memcpy(new_triggers.patterns[i].pattern,
7911                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7912                                pat_len);
7913                         i++;
7914                 }
7915         }
7916
7917         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7918                 err = nl80211_parse_wowlan_tcp(
7919                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7920                         &new_triggers);
7921                 if (err)
7922                         goto error;
7923         }
7924
7925         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7926         if (!ntrig) {
7927                 err = -ENOMEM;
7928                 goto error;
7929         }
7930         cfg80211_rdev_free_wowlan(rdev);
7931         rdev->wowlan = ntrig;
7932
7933  set_wakeup:
7934         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7935                 rdev_set_wakeup(rdev, rdev->wowlan);
7936
7937         return 0;
7938  error:
7939         for (i = 0; i < new_triggers.n_patterns; i++)
7940                 kfree(new_triggers.patterns[i].mask);
7941         kfree(new_triggers.patterns);
7942         if (new_triggers.tcp && new_triggers.tcp->sock)
7943                 sock_release(new_triggers.tcp->sock);
7944         kfree(new_triggers.tcp);
7945         return err;
7946 }
7947 #endif
7948
7949 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7950 {
7951         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7952         struct net_device *dev = info->user_ptr[1];
7953         struct wireless_dev *wdev = dev->ieee80211_ptr;
7954         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7955         struct cfg80211_gtk_rekey_data rekey_data;
7956         int err;
7957
7958         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7959                 return -EINVAL;
7960
7961         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7962                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7963                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7964                         nl80211_rekey_policy);
7965         if (err)
7966                 return err;
7967
7968         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7969                 return -ERANGE;
7970         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7971                 return -ERANGE;
7972         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7973                 return -ERANGE;
7974
7975         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7976                NL80211_KEK_LEN);
7977         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7978                NL80211_KCK_LEN);
7979         memcpy(rekey_data.replay_ctr,
7980                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7981                NL80211_REPLAY_CTR_LEN);
7982
7983         wdev_lock(wdev);
7984         if (!wdev->current_bss) {
7985                 err = -ENOTCONN;
7986                 goto out;
7987         }
7988
7989         if (!rdev->ops->set_rekey_data) {
7990                 err = -EOPNOTSUPP;
7991                 goto out;
7992         }
7993
7994         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7995  out:
7996         wdev_unlock(wdev);
7997         return err;
7998 }
7999
8000 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8001                                              struct genl_info *info)
8002 {
8003         struct net_device *dev = info->user_ptr[1];
8004         struct wireless_dev *wdev = dev->ieee80211_ptr;
8005
8006         if (wdev->iftype != NL80211_IFTYPE_AP &&
8007             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8008                 return -EINVAL;
8009
8010         if (wdev->ap_unexpected_nlportid)
8011                 return -EBUSY;
8012
8013         wdev->ap_unexpected_nlportid = info->snd_portid;
8014         return 0;
8015 }
8016
8017 static int nl80211_probe_client(struct sk_buff *skb,
8018                                 struct genl_info *info)
8019 {
8020         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8021         struct net_device *dev = info->user_ptr[1];
8022         struct wireless_dev *wdev = dev->ieee80211_ptr;
8023         struct sk_buff *msg;
8024         void *hdr;
8025         const u8 *addr;
8026         u64 cookie;
8027         int err;
8028
8029         if (wdev->iftype != NL80211_IFTYPE_AP &&
8030             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8031                 return -EOPNOTSUPP;
8032
8033         if (!info->attrs[NL80211_ATTR_MAC])
8034                 return -EINVAL;
8035
8036         if (!rdev->ops->probe_client)
8037                 return -EOPNOTSUPP;
8038
8039         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8040         if (!msg)
8041                 return -ENOMEM;
8042
8043         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8044                              NL80211_CMD_PROBE_CLIENT);
8045
8046         if (IS_ERR(hdr)) {
8047                 err = PTR_ERR(hdr);
8048                 goto free_msg;
8049         }
8050
8051         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8052
8053         err = rdev_probe_client(rdev, dev, addr, &cookie);
8054         if (err)
8055                 goto free_msg;
8056
8057         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8058                 goto nla_put_failure;
8059
8060         genlmsg_end(msg, hdr);
8061
8062         return genlmsg_reply(msg, info);
8063
8064  nla_put_failure:
8065         err = -ENOBUFS;
8066  free_msg:
8067         nlmsg_free(msg);
8068         return err;
8069 }
8070
8071 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8072 {
8073         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8074         struct cfg80211_beacon_registration *reg, *nreg;
8075         int rv;
8076
8077         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8078                 return -EOPNOTSUPP;
8079
8080         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8081         if (!nreg)
8082                 return -ENOMEM;
8083
8084         /* First, check if already registered. */
8085         spin_lock_bh(&rdev->beacon_registrations_lock);
8086         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8087                 if (reg->nlportid == info->snd_portid) {
8088                         rv = -EALREADY;
8089                         goto out_err;
8090                 }
8091         }
8092         /* Add it to the list */
8093         nreg->nlportid = info->snd_portid;
8094         list_add(&nreg->list, &rdev->beacon_registrations);
8095
8096         spin_unlock_bh(&rdev->beacon_registrations_lock);
8097
8098         return 0;
8099 out_err:
8100         spin_unlock_bh(&rdev->beacon_registrations_lock);
8101         kfree(nreg);
8102         return rv;
8103 }
8104
8105 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8106 {
8107         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8108         struct wireless_dev *wdev = info->user_ptr[1];
8109         int err;
8110
8111         if (!rdev->ops->start_p2p_device)
8112                 return -EOPNOTSUPP;
8113
8114         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8115                 return -EOPNOTSUPP;
8116
8117         if (wdev->p2p_started)
8118                 return 0;
8119
8120         mutex_lock(&rdev->devlist_mtx);
8121         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8122         mutex_unlock(&rdev->devlist_mtx);
8123         if (err)
8124                 return err;
8125
8126         err = rdev_start_p2p_device(rdev, wdev);
8127         if (err)
8128                 return err;
8129
8130         wdev->p2p_started = true;
8131         mutex_lock(&rdev->devlist_mtx);
8132         rdev->opencount++;
8133         mutex_unlock(&rdev->devlist_mtx);
8134
8135         return 0;
8136 }
8137
8138 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8139 {
8140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8141         struct wireless_dev *wdev = info->user_ptr[1];
8142
8143         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8144                 return -EOPNOTSUPP;
8145
8146         if (!rdev->ops->stop_p2p_device)
8147                 return -EOPNOTSUPP;
8148
8149         if (!wdev->p2p_started)
8150                 return 0;
8151
8152         rdev_stop_p2p_device(rdev, wdev);
8153         wdev->p2p_started = false;
8154
8155         mutex_lock(&rdev->devlist_mtx);
8156         rdev->opencount--;
8157         mutex_unlock(&rdev->devlist_mtx);
8158
8159         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
8160                 rdev->scan_req->aborted = true;
8161                 ___cfg80211_scan_done(rdev, true);
8162         }
8163
8164         return 0;
8165 }
8166
8167 static int nl80211_get_protocol_features(struct sk_buff *skb,
8168                                          struct genl_info *info)
8169 {
8170         void *hdr;
8171         struct sk_buff *msg;
8172
8173         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8174         if (!msg)
8175                 return -ENOMEM;
8176
8177         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8178                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8179         if (!hdr)
8180                 goto nla_put_failure;
8181
8182         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8183                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8184                 goto nla_put_failure;
8185
8186         genlmsg_end(msg, hdr);
8187         return genlmsg_reply(msg, info);
8188
8189  nla_put_failure:
8190         kfree_skb(msg);
8191         return -ENOBUFS;
8192 }
8193
8194 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8195 {
8196         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8197         struct cfg80211_update_ft_ies_params ft_params;
8198         struct net_device *dev = info->user_ptr[1];
8199
8200         if (!rdev->ops->update_ft_ies)
8201                 return -EOPNOTSUPP;
8202
8203         if (!info->attrs[NL80211_ATTR_MDID] ||
8204             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8205                 return -EINVAL;
8206
8207         memset(&ft_params, 0, sizeof(ft_params));
8208         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8209         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8210         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8211
8212         return rdev_update_ft_ies(rdev, dev, &ft_params);
8213 }
8214
8215 #define NL80211_FLAG_NEED_WIPHY         0x01
8216 #define NL80211_FLAG_NEED_NETDEV        0x02
8217 #define NL80211_FLAG_NEED_RTNL          0x04
8218 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8219 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8220                                          NL80211_FLAG_CHECK_NETDEV_UP)
8221 #define NL80211_FLAG_NEED_WDEV          0x10
8222 /* If a netdev is associated, it must be UP, P2P must be started */
8223 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8224                                          NL80211_FLAG_CHECK_NETDEV_UP)
8225
8226 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8227                             struct genl_info *info)
8228 {
8229         struct cfg80211_registered_device *rdev;
8230         struct wireless_dev *wdev;
8231         struct net_device *dev;
8232         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8233
8234         if (rtnl)
8235                 rtnl_lock();
8236
8237         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8238                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8239                 if (IS_ERR(rdev)) {
8240                         if (rtnl)
8241                                 rtnl_unlock();
8242                         return PTR_ERR(rdev);
8243                 }
8244                 info->user_ptr[0] = rdev;
8245         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8246                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8247                 mutex_lock(&cfg80211_mutex);
8248                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8249                                                   info->attrs);
8250                 if (IS_ERR(wdev)) {
8251                         mutex_unlock(&cfg80211_mutex);
8252                         if (rtnl)
8253                                 rtnl_unlock();
8254                         return PTR_ERR(wdev);
8255                 }
8256
8257                 dev = wdev->netdev;
8258                 rdev = wiphy_to_dev(wdev->wiphy);
8259
8260                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8261                         if (!dev) {
8262                                 mutex_unlock(&cfg80211_mutex);
8263                                 if (rtnl)
8264                                         rtnl_unlock();
8265                                 return -EINVAL;
8266                         }
8267
8268                         info->user_ptr[1] = dev;
8269                 } else {
8270                         info->user_ptr[1] = wdev;
8271                 }
8272
8273                 if (dev) {
8274                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8275                             !netif_running(dev)) {
8276                                 mutex_unlock(&cfg80211_mutex);
8277                                 if (rtnl)
8278                                         rtnl_unlock();
8279                                 return -ENETDOWN;
8280                         }
8281
8282                         dev_hold(dev);
8283                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8284                         if (!wdev->p2p_started) {
8285                                 mutex_unlock(&cfg80211_mutex);
8286                                 if (rtnl)
8287                                         rtnl_unlock();
8288                                 return -ENETDOWN;
8289                         }
8290                 }
8291
8292                 cfg80211_lock_rdev(rdev);
8293
8294                 mutex_unlock(&cfg80211_mutex);
8295
8296                 info->user_ptr[0] = rdev;
8297         }
8298
8299         return 0;
8300 }
8301
8302 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8303                               struct genl_info *info)
8304 {
8305         if (info->user_ptr[0])
8306                 cfg80211_unlock_rdev(info->user_ptr[0]);
8307         if (info->user_ptr[1]) {
8308                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8309                         struct wireless_dev *wdev = info->user_ptr[1];
8310
8311                         if (wdev->netdev)
8312                                 dev_put(wdev->netdev);
8313                 } else {
8314                         dev_put(info->user_ptr[1]);
8315                 }
8316         }
8317         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8318                 rtnl_unlock();
8319 }
8320
8321 static struct genl_ops nl80211_ops[] = {
8322         {
8323                 .cmd = NL80211_CMD_GET_WIPHY,
8324                 .doit = nl80211_get_wiphy,
8325                 .dumpit = nl80211_dump_wiphy,
8326                 .policy = nl80211_policy,
8327                 /* can be retrieved by unprivileged users */
8328                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
8329         },
8330         {
8331                 .cmd = NL80211_CMD_SET_WIPHY,
8332                 .doit = nl80211_set_wiphy,
8333                 .policy = nl80211_policy,
8334                 .flags = GENL_ADMIN_PERM,
8335                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8336         },
8337         {
8338                 .cmd = NL80211_CMD_GET_INTERFACE,
8339                 .doit = nl80211_get_interface,
8340                 .dumpit = nl80211_dump_interface,
8341                 .policy = nl80211_policy,
8342                 /* can be retrieved by unprivileged users */
8343                 .internal_flags = NL80211_FLAG_NEED_WDEV,
8344         },
8345         {
8346                 .cmd = NL80211_CMD_SET_INTERFACE,
8347                 .doit = nl80211_set_interface,
8348                 .policy = nl80211_policy,
8349                 .flags = GENL_ADMIN_PERM,
8350                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8351                                   NL80211_FLAG_NEED_RTNL,
8352         },
8353         {
8354                 .cmd = NL80211_CMD_NEW_INTERFACE,
8355                 .doit = nl80211_new_interface,
8356                 .policy = nl80211_policy,
8357                 .flags = GENL_ADMIN_PERM,
8358                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8359                                   NL80211_FLAG_NEED_RTNL,
8360         },
8361         {
8362                 .cmd = NL80211_CMD_DEL_INTERFACE,
8363                 .doit = nl80211_del_interface,
8364                 .policy = nl80211_policy,
8365                 .flags = GENL_ADMIN_PERM,
8366                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8367                                   NL80211_FLAG_NEED_RTNL,
8368         },
8369         {
8370                 .cmd = NL80211_CMD_GET_KEY,
8371                 .doit = nl80211_get_key,
8372                 .policy = nl80211_policy,
8373                 .flags = GENL_ADMIN_PERM,
8374                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8375                                   NL80211_FLAG_NEED_RTNL,
8376         },
8377         {
8378                 .cmd = NL80211_CMD_SET_KEY,
8379                 .doit = nl80211_set_key,
8380                 .policy = nl80211_policy,
8381                 .flags = GENL_ADMIN_PERM,
8382                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8383                                   NL80211_FLAG_NEED_RTNL,
8384         },
8385         {
8386                 .cmd = NL80211_CMD_NEW_KEY,
8387                 .doit = nl80211_new_key,
8388                 .policy = nl80211_policy,
8389                 .flags = GENL_ADMIN_PERM,
8390                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8391                                   NL80211_FLAG_NEED_RTNL,
8392         },
8393         {
8394                 .cmd = NL80211_CMD_DEL_KEY,
8395                 .doit = nl80211_del_key,
8396                 .policy = nl80211_policy,
8397                 .flags = GENL_ADMIN_PERM,
8398                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8399                                   NL80211_FLAG_NEED_RTNL,
8400         },
8401         {
8402                 .cmd = NL80211_CMD_SET_BEACON,
8403                 .policy = nl80211_policy,
8404                 .flags = GENL_ADMIN_PERM,
8405                 .doit = nl80211_set_beacon,
8406                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8407                                   NL80211_FLAG_NEED_RTNL,
8408         },
8409         {
8410                 .cmd = NL80211_CMD_START_AP,
8411                 .policy = nl80211_policy,
8412                 .flags = GENL_ADMIN_PERM,
8413                 .doit = nl80211_start_ap,
8414                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8415                                   NL80211_FLAG_NEED_RTNL,
8416         },
8417         {
8418                 .cmd = NL80211_CMD_STOP_AP,
8419                 .policy = nl80211_policy,
8420                 .flags = GENL_ADMIN_PERM,
8421                 .doit = nl80211_stop_ap,
8422                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8423                                   NL80211_FLAG_NEED_RTNL,
8424         },
8425         {
8426                 .cmd = NL80211_CMD_GET_STATION,
8427                 .doit = nl80211_get_station,
8428                 .dumpit = nl80211_dump_station,
8429                 .policy = nl80211_policy,
8430                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8431                                   NL80211_FLAG_NEED_RTNL,
8432         },
8433         {
8434                 .cmd = NL80211_CMD_SET_STATION,
8435                 .doit = nl80211_set_station,
8436                 .policy = nl80211_policy,
8437                 .flags = GENL_ADMIN_PERM,
8438                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8439                                   NL80211_FLAG_NEED_RTNL,
8440         },
8441         {
8442                 .cmd = NL80211_CMD_NEW_STATION,
8443                 .doit = nl80211_new_station,
8444                 .policy = nl80211_policy,
8445                 .flags = GENL_ADMIN_PERM,
8446                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8447                                   NL80211_FLAG_NEED_RTNL,
8448         },
8449         {
8450                 .cmd = NL80211_CMD_DEL_STATION,
8451                 .doit = nl80211_del_station,
8452                 .policy = nl80211_policy,
8453                 .flags = GENL_ADMIN_PERM,
8454                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8455                                   NL80211_FLAG_NEED_RTNL,
8456         },
8457         {
8458                 .cmd = NL80211_CMD_GET_MPATH,
8459                 .doit = nl80211_get_mpath,
8460                 .dumpit = nl80211_dump_mpath,
8461                 .policy = nl80211_policy,
8462                 .flags = GENL_ADMIN_PERM,
8463                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8464                                   NL80211_FLAG_NEED_RTNL,
8465         },
8466         {
8467                 .cmd = NL80211_CMD_SET_MPATH,
8468                 .doit = nl80211_set_mpath,
8469                 .policy = nl80211_policy,
8470                 .flags = GENL_ADMIN_PERM,
8471                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8472                                   NL80211_FLAG_NEED_RTNL,
8473         },
8474         {
8475                 .cmd = NL80211_CMD_NEW_MPATH,
8476                 .doit = nl80211_new_mpath,
8477                 .policy = nl80211_policy,
8478                 .flags = GENL_ADMIN_PERM,
8479                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8480                                   NL80211_FLAG_NEED_RTNL,
8481         },
8482         {
8483                 .cmd = NL80211_CMD_DEL_MPATH,
8484                 .doit = nl80211_del_mpath,
8485                 .policy = nl80211_policy,
8486                 .flags = GENL_ADMIN_PERM,
8487                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8488                                   NL80211_FLAG_NEED_RTNL,
8489         },
8490         {
8491                 .cmd = NL80211_CMD_SET_BSS,
8492                 .doit = nl80211_set_bss,
8493                 .policy = nl80211_policy,
8494                 .flags = GENL_ADMIN_PERM,
8495                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8496                                   NL80211_FLAG_NEED_RTNL,
8497         },
8498         {
8499                 .cmd = NL80211_CMD_GET_REG,
8500                 .doit = nl80211_get_reg,
8501                 .policy = nl80211_policy,
8502                 /* can be retrieved by unprivileged users */
8503         },
8504         {
8505                 .cmd = NL80211_CMD_SET_REG,
8506                 .doit = nl80211_set_reg,
8507                 .policy = nl80211_policy,
8508                 .flags = GENL_ADMIN_PERM,
8509         },
8510         {
8511                 .cmd = NL80211_CMD_REQ_SET_REG,
8512                 .doit = nl80211_req_set_reg,
8513                 .policy = nl80211_policy,
8514                 .flags = GENL_ADMIN_PERM,
8515         },
8516         {
8517                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8518                 .doit = nl80211_get_mesh_config,
8519                 .policy = nl80211_policy,
8520                 /* can be retrieved by unprivileged users */
8521                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8522                                   NL80211_FLAG_NEED_RTNL,
8523         },
8524         {
8525                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8526                 .doit = nl80211_update_mesh_config,
8527                 .policy = nl80211_policy,
8528                 .flags = GENL_ADMIN_PERM,
8529                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8530                                   NL80211_FLAG_NEED_RTNL,
8531         },
8532         {
8533                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8534                 .doit = nl80211_trigger_scan,
8535                 .policy = nl80211_policy,
8536                 .flags = GENL_ADMIN_PERM,
8537                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8538                                   NL80211_FLAG_NEED_RTNL,
8539         },
8540         {
8541                 .cmd = NL80211_CMD_GET_SCAN,
8542                 .policy = nl80211_policy,
8543                 .dumpit = nl80211_dump_scan,
8544         },
8545         {
8546                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8547                 .doit = nl80211_start_sched_scan,
8548                 .policy = nl80211_policy,
8549                 .flags = GENL_ADMIN_PERM,
8550                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8551                                   NL80211_FLAG_NEED_RTNL,
8552         },
8553         {
8554                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8555                 .doit = nl80211_stop_sched_scan,
8556                 .policy = nl80211_policy,
8557                 .flags = GENL_ADMIN_PERM,
8558                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8559                                   NL80211_FLAG_NEED_RTNL,
8560         },
8561         {
8562                 .cmd = NL80211_CMD_AUTHENTICATE,
8563                 .doit = nl80211_authenticate,
8564                 .policy = nl80211_policy,
8565                 .flags = GENL_ADMIN_PERM,
8566                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8567                                   NL80211_FLAG_NEED_RTNL,
8568         },
8569         {
8570                 .cmd = NL80211_CMD_ASSOCIATE,
8571                 .doit = nl80211_associate,
8572                 .policy = nl80211_policy,
8573                 .flags = GENL_ADMIN_PERM,
8574                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8575                                   NL80211_FLAG_NEED_RTNL,
8576         },
8577         {
8578                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8579                 .doit = nl80211_deauthenticate,
8580                 .policy = nl80211_policy,
8581                 .flags = GENL_ADMIN_PERM,
8582                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8583                                   NL80211_FLAG_NEED_RTNL,
8584         },
8585         {
8586                 .cmd = NL80211_CMD_DISASSOCIATE,
8587                 .doit = nl80211_disassociate,
8588                 .policy = nl80211_policy,
8589                 .flags = GENL_ADMIN_PERM,
8590                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8591                                   NL80211_FLAG_NEED_RTNL,
8592         },
8593         {
8594                 .cmd = NL80211_CMD_JOIN_IBSS,
8595                 .doit = nl80211_join_ibss,
8596                 .policy = nl80211_policy,
8597                 .flags = GENL_ADMIN_PERM,
8598                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8599                                   NL80211_FLAG_NEED_RTNL,
8600         },
8601         {
8602                 .cmd = NL80211_CMD_LEAVE_IBSS,
8603                 .doit = nl80211_leave_ibss,
8604                 .policy = nl80211_policy,
8605                 .flags = GENL_ADMIN_PERM,
8606                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8607                                   NL80211_FLAG_NEED_RTNL,
8608         },
8609 #ifdef CONFIG_NL80211_TESTMODE
8610         {
8611                 .cmd = NL80211_CMD_TESTMODE,
8612                 .doit = nl80211_testmode_do,
8613                 .dumpit = nl80211_testmode_dump,
8614                 .policy = nl80211_policy,
8615                 .flags = GENL_ADMIN_PERM,
8616                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8617                                   NL80211_FLAG_NEED_RTNL,
8618         },
8619 #endif
8620         {
8621                 .cmd = NL80211_CMD_CONNECT,
8622                 .doit = nl80211_connect,
8623                 .policy = nl80211_policy,
8624                 .flags = GENL_ADMIN_PERM,
8625                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8626                                   NL80211_FLAG_NEED_RTNL,
8627         },
8628         {
8629                 .cmd = NL80211_CMD_DISCONNECT,
8630                 .doit = nl80211_disconnect,
8631                 .policy = nl80211_policy,
8632                 .flags = GENL_ADMIN_PERM,
8633                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8634                                   NL80211_FLAG_NEED_RTNL,
8635         },
8636         {
8637                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8638                 .doit = nl80211_wiphy_netns,
8639                 .policy = nl80211_policy,
8640                 .flags = GENL_ADMIN_PERM,
8641                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8642                                   NL80211_FLAG_NEED_RTNL,
8643         },
8644         {
8645                 .cmd = NL80211_CMD_GET_SURVEY,
8646                 .policy = nl80211_policy,
8647                 .dumpit = nl80211_dump_survey,
8648         },
8649         {
8650                 .cmd = NL80211_CMD_SET_PMKSA,
8651                 .doit = nl80211_setdel_pmksa,
8652                 .policy = nl80211_policy,
8653                 .flags = GENL_ADMIN_PERM,
8654                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8655                                   NL80211_FLAG_NEED_RTNL,
8656         },
8657         {
8658                 .cmd = NL80211_CMD_DEL_PMKSA,
8659                 .doit = nl80211_setdel_pmksa,
8660                 .policy = nl80211_policy,
8661                 .flags = GENL_ADMIN_PERM,
8662                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8663                                   NL80211_FLAG_NEED_RTNL,
8664         },
8665         {
8666                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8667                 .doit = nl80211_flush_pmksa,
8668                 .policy = nl80211_policy,
8669                 .flags = GENL_ADMIN_PERM,
8670                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8671                                   NL80211_FLAG_NEED_RTNL,
8672         },
8673         {
8674                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8675                 .doit = nl80211_remain_on_channel,
8676                 .policy = nl80211_policy,
8677                 .flags = GENL_ADMIN_PERM,
8678                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8679                                   NL80211_FLAG_NEED_RTNL,
8680         },
8681         {
8682                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8683                 .doit = nl80211_cancel_remain_on_channel,
8684                 .policy = nl80211_policy,
8685                 .flags = GENL_ADMIN_PERM,
8686                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8687                                   NL80211_FLAG_NEED_RTNL,
8688         },
8689         {
8690                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8691                 .doit = nl80211_set_tx_bitrate_mask,
8692                 .policy = nl80211_policy,
8693                 .flags = GENL_ADMIN_PERM,
8694                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8695                                   NL80211_FLAG_NEED_RTNL,
8696         },
8697         {
8698                 .cmd = NL80211_CMD_REGISTER_FRAME,
8699                 .doit = nl80211_register_mgmt,
8700                 .policy = nl80211_policy,
8701                 .flags = GENL_ADMIN_PERM,
8702                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8703                                   NL80211_FLAG_NEED_RTNL,
8704         },
8705         {
8706                 .cmd = NL80211_CMD_FRAME,
8707                 .doit = nl80211_tx_mgmt,
8708                 .policy = nl80211_policy,
8709                 .flags = GENL_ADMIN_PERM,
8710                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8711                                   NL80211_FLAG_NEED_RTNL,
8712         },
8713         {
8714                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8715                 .doit = nl80211_tx_mgmt_cancel_wait,
8716                 .policy = nl80211_policy,
8717                 .flags = GENL_ADMIN_PERM,
8718                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8719                                   NL80211_FLAG_NEED_RTNL,
8720         },
8721         {
8722                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8723                 .doit = nl80211_set_power_save,
8724                 .policy = nl80211_policy,
8725                 .flags = GENL_ADMIN_PERM,
8726                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8727                                   NL80211_FLAG_NEED_RTNL,
8728         },
8729         {
8730                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8731                 .doit = nl80211_get_power_save,
8732                 .policy = nl80211_policy,
8733                 /* can be retrieved by unprivileged users */
8734                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8735                                   NL80211_FLAG_NEED_RTNL,
8736         },
8737         {
8738                 .cmd = NL80211_CMD_SET_CQM,
8739                 .doit = nl80211_set_cqm,
8740                 .policy = nl80211_policy,
8741                 .flags = GENL_ADMIN_PERM,
8742                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8743                                   NL80211_FLAG_NEED_RTNL,
8744         },
8745         {
8746                 .cmd = NL80211_CMD_SET_CHANNEL,
8747                 .doit = nl80211_set_channel,
8748                 .policy = nl80211_policy,
8749                 .flags = GENL_ADMIN_PERM,
8750                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8751                                   NL80211_FLAG_NEED_RTNL,
8752         },
8753         {
8754                 .cmd = NL80211_CMD_SET_WDS_PEER,
8755                 .doit = nl80211_set_wds_peer,
8756                 .policy = nl80211_policy,
8757                 .flags = GENL_ADMIN_PERM,
8758                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8759                                   NL80211_FLAG_NEED_RTNL,
8760         },
8761         {
8762                 .cmd = NL80211_CMD_JOIN_MESH,
8763                 .doit = nl80211_join_mesh,
8764                 .policy = nl80211_policy,
8765                 .flags = GENL_ADMIN_PERM,
8766                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8767                                   NL80211_FLAG_NEED_RTNL,
8768         },
8769         {
8770                 .cmd = NL80211_CMD_LEAVE_MESH,
8771                 .doit = nl80211_leave_mesh,
8772                 .policy = nl80211_policy,
8773                 .flags = GENL_ADMIN_PERM,
8774                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8775                                   NL80211_FLAG_NEED_RTNL,
8776         },
8777 #ifdef CONFIG_PM
8778         {
8779                 .cmd = NL80211_CMD_GET_WOWLAN,
8780                 .doit = nl80211_get_wowlan,
8781                 .policy = nl80211_policy,
8782                 /* can be retrieved by unprivileged users */
8783                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8784                                   NL80211_FLAG_NEED_RTNL,
8785         },
8786         {
8787                 .cmd = NL80211_CMD_SET_WOWLAN,
8788                 .doit = nl80211_set_wowlan,
8789                 .policy = nl80211_policy,
8790                 .flags = GENL_ADMIN_PERM,
8791                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8792                                   NL80211_FLAG_NEED_RTNL,
8793         },
8794 #endif
8795         {
8796                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8797                 .doit = nl80211_set_rekey_data,
8798                 .policy = nl80211_policy,
8799                 .flags = GENL_ADMIN_PERM,
8800                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8801                                   NL80211_FLAG_NEED_RTNL,
8802         },
8803         {
8804                 .cmd = NL80211_CMD_TDLS_MGMT,
8805                 .doit = nl80211_tdls_mgmt,
8806                 .policy = nl80211_policy,
8807                 .flags = GENL_ADMIN_PERM,
8808                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8809                                   NL80211_FLAG_NEED_RTNL,
8810         },
8811         {
8812                 .cmd = NL80211_CMD_TDLS_OPER,
8813                 .doit = nl80211_tdls_oper,
8814                 .policy = nl80211_policy,
8815                 .flags = GENL_ADMIN_PERM,
8816                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8817                                   NL80211_FLAG_NEED_RTNL,
8818         },
8819         {
8820                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8821                 .doit = nl80211_register_unexpected_frame,
8822                 .policy = nl80211_policy,
8823                 .flags = GENL_ADMIN_PERM,
8824                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8825                                   NL80211_FLAG_NEED_RTNL,
8826         },
8827         {
8828                 .cmd = NL80211_CMD_PROBE_CLIENT,
8829                 .doit = nl80211_probe_client,
8830                 .policy = nl80211_policy,
8831                 .flags = GENL_ADMIN_PERM,
8832                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8833                                   NL80211_FLAG_NEED_RTNL,
8834         },
8835         {
8836                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8837                 .doit = nl80211_register_beacons,
8838                 .policy = nl80211_policy,
8839                 .flags = GENL_ADMIN_PERM,
8840                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8841                                   NL80211_FLAG_NEED_RTNL,
8842         },
8843         {
8844                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8845                 .doit = nl80211_set_noack_map,
8846                 .policy = nl80211_policy,
8847                 .flags = GENL_ADMIN_PERM,
8848                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8849                                   NL80211_FLAG_NEED_RTNL,
8850         },
8851         {
8852                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8853                 .doit = nl80211_start_p2p_device,
8854                 .policy = nl80211_policy,
8855                 .flags = GENL_ADMIN_PERM,
8856                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8857                                   NL80211_FLAG_NEED_RTNL,
8858         },
8859         {
8860                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8861                 .doit = nl80211_stop_p2p_device,
8862                 .policy = nl80211_policy,
8863                 .flags = GENL_ADMIN_PERM,
8864                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8865                                   NL80211_FLAG_NEED_RTNL,
8866         },
8867         {
8868                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8869                 .doit = nl80211_set_mcast_rate,
8870                 .policy = nl80211_policy,
8871                 .flags = GENL_ADMIN_PERM,
8872                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8873                                   NL80211_FLAG_NEED_RTNL,
8874         },
8875         {
8876                 .cmd = NL80211_CMD_SET_MAC_ACL,
8877                 .doit = nl80211_set_mac_acl,
8878                 .policy = nl80211_policy,
8879                 .flags = GENL_ADMIN_PERM,
8880                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8881                                   NL80211_FLAG_NEED_RTNL,
8882         },
8883         {
8884                 .cmd = NL80211_CMD_RADAR_DETECT,
8885                 .doit = nl80211_start_radar_detection,
8886                 .policy = nl80211_policy,
8887                 .flags = GENL_ADMIN_PERM,
8888                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8889                                   NL80211_FLAG_NEED_RTNL,
8890         },
8891         {
8892                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
8893                 .doit = nl80211_get_protocol_features,
8894                 .policy = nl80211_policy,
8895         },
8896         {
8897                 .cmd = NL80211_CMD_UPDATE_FT_IES,
8898                 .doit = nl80211_update_ft_ies,
8899                 .policy = nl80211_policy,
8900                 .flags = GENL_ADMIN_PERM,
8901                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8902                                   NL80211_FLAG_NEED_RTNL,
8903         },
8904 };
8905
8906 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8907         .name = "mlme",
8908 };
8909
8910 /* multicast groups */
8911 static struct genl_multicast_group nl80211_config_mcgrp = {
8912         .name = "config",
8913 };
8914 static struct genl_multicast_group nl80211_scan_mcgrp = {
8915         .name = "scan",
8916 };
8917 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8918         .name = "regulatory",
8919 };
8920
8921 /* notification functions */
8922
8923 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8924 {
8925         struct sk_buff *msg;
8926
8927         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8928         if (!msg)
8929                 return;
8930
8931         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0,
8932                                false, NULL, NULL, NULL) < 0) {
8933                 nlmsg_free(msg);
8934                 return;
8935         }
8936
8937         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8938                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8939 }
8940
8941 static int nl80211_add_scan_req(struct sk_buff *msg,
8942                                 struct cfg80211_registered_device *rdev)
8943 {
8944         struct cfg80211_scan_request *req = rdev->scan_req;
8945         struct nlattr *nest;
8946         int i;
8947
8948         ASSERT_RDEV_LOCK(rdev);
8949
8950         if (WARN_ON(!req))
8951                 return 0;
8952
8953         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8954         if (!nest)
8955                 goto nla_put_failure;
8956         for (i = 0; i < req->n_ssids; i++) {
8957                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8958                         goto nla_put_failure;
8959         }
8960         nla_nest_end(msg, nest);
8961
8962         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8963         if (!nest)
8964                 goto nla_put_failure;
8965         for (i = 0; i < req->n_channels; i++) {
8966                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8967                         goto nla_put_failure;
8968         }
8969         nla_nest_end(msg, nest);
8970
8971         if (req->ie &&
8972             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8973                 goto nla_put_failure;
8974
8975         if (req->flags)
8976                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8977
8978         return 0;
8979  nla_put_failure:
8980         return -ENOBUFS;
8981 }
8982
8983 static int nl80211_send_scan_msg(struct sk_buff *msg,
8984                                  struct cfg80211_registered_device *rdev,
8985                                  struct wireless_dev *wdev,
8986                                  u32 portid, u32 seq, int flags,
8987                                  u32 cmd)
8988 {
8989         void *hdr;
8990
8991         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8992         if (!hdr)
8993                 return -1;
8994
8995         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8996             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8997                                          wdev->netdev->ifindex)) ||
8998             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8999                 goto nla_put_failure;
9000
9001         /* ignore errors and send incomplete event anyway */
9002         nl80211_add_scan_req(msg, rdev);
9003
9004         return genlmsg_end(msg, hdr);
9005
9006  nla_put_failure:
9007         genlmsg_cancel(msg, hdr);
9008         return -EMSGSIZE;
9009 }
9010
9011 static int
9012 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9013                             struct cfg80211_registered_device *rdev,
9014                             struct net_device *netdev,
9015                             u32 portid, u32 seq, int flags, u32 cmd)
9016 {
9017         void *hdr;
9018
9019         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9020         if (!hdr)
9021                 return -1;
9022
9023         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9024             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9025                 goto nla_put_failure;
9026
9027         return genlmsg_end(msg, hdr);
9028
9029  nla_put_failure:
9030         genlmsg_cancel(msg, hdr);
9031         return -EMSGSIZE;
9032 }
9033
9034 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9035                              struct wireless_dev *wdev)
9036 {
9037         struct sk_buff *msg;
9038
9039         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9040         if (!msg)
9041                 return;
9042
9043         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9044                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9045                 nlmsg_free(msg);
9046                 return;
9047         }
9048
9049         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9050                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9051 }
9052
9053 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9054                             struct wireless_dev *wdev)
9055 {
9056         struct sk_buff *msg;
9057
9058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9059         if (!msg)
9060                 return;
9061
9062         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9063                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9064                 nlmsg_free(msg);
9065                 return;
9066         }
9067
9068         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9069                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9070 }
9071
9072 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9073                                struct wireless_dev *wdev)
9074 {
9075         struct sk_buff *msg;
9076
9077         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9078         if (!msg)
9079                 return;
9080
9081         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9082                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9083                 nlmsg_free(msg);
9084                 return;
9085         }
9086
9087         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9088                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9089 }
9090
9091 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9092                                      struct net_device *netdev)
9093 {
9094         struct sk_buff *msg;
9095
9096         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9097         if (!msg)
9098                 return;
9099
9100         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9101                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9102                 nlmsg_free(msg);
9103                 return;
9104         }
9105
9106         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9107                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9108 }
9109
9110 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9111                              struct net_device *netdev, u32 cmd)
9112 {
9113         struct sk_buff *msg;
9114
9115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9116         if (!msg)
9117                 return;
9118
9119         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9120                 nlmsg_free(msg);
9121                 return;
9122         }
9123
9124         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9125                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9126 }
9127
9128 /*
9129  * This can happen on global regulatory changes or device specific settings
9130  * based on custom world regulatory domains.
9131  */
9132 void nl80211_send_reg_change_event(struct regulatory_request *request)
9133 {
9134         struct sk_buff *msg;
9135         void *hdr;
9136
9137         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9138         if (!msg)
9139                 return;
9140
9141         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9142         if (!hdr) {
9143                 nlmsg_free(msg);
9144                 return;
9145         }
9146
9147         /* Userspace can always count this one always being set */
9148         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9149                 goto nla_put_failure;
9150
9151         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9152                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9153                                NL80211_REGDOM_TYPE_WORLD))
9154                         goto nla_put_failure;
9155         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9156                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9157                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9158                         goto nla_put_failure;
9159         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9160                    request->intersect) {
9161                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9162                                NL80211_REGDOM_TYPE_INTERSECTION))
9163                         goto nla_put_failure;
9164         } else {
9165                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9166                                NL80211_REGDOM_TYPE_COUNTRY) ||
9167                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9168                                    request->alpha2))
9169                         goto nla_put_failure;
9170         }
9171
9172         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9173             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9174                 goto nla_put_failure;
9175
9176         genlmsg_end(msg, hdr);
9177
9178         rcu_read_lock();
9179         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9180                                 GFP_ATOMIC);
9181         rcu_read_unlock();
9182
9183         return;
9184
9185 nla_put_failure:
9186         genlmsg_cancel(msg, hdr);
9187         nlmsg_free(msg);
9188 }
9189
9190 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9191                                     struct net_device *netdev,
9192                                     const u8 *buf, size_t len,
9193                                     enum nl80211_commands cmd, gfp_t gfp)
9194 {
9195         struct sk_buff *msg;
9196         void *hdr;
9197
9198         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9199         if (!msg)
9200                 return;
9201
9202         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9203         if (!hdr) {
9204                 nlmsg_free(msg);
9205                 return;
9206         }
9207
9208         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9209             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9210             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9211                 goto nla_put_failure;
9212
9213         genlmsg_end(msg, hdr);
9214
9215         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9216                                 nl80211_mlme_mcgrp.id, gfp);
9217         return;
9218
9219  nla_put_failure:
9220         genlmsg_cancel(msg, hdr);
9221         nlmsg_free(msg);
9222 }
9223
9224 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9225                           struct net_device *netdev, const u8 *buf,
9226                           size_t len, gfp_t gfp)
9227 {
9228         nl80211_send_mlme_event(rdev, netdev, buf, len,
9229                                 NL80211_CMD_AUTHENTICATE, gfp);
9230 }
9231
9232 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9233                            struct net_device *netdev, const u8 *buf,
9234                            size_t len, gfp_t gfp)
9235 {
9236         nl80211_send_mlme_event(rdev, netdev, buf, len,
9237                                 NL80211_CMD_ASSOCIATE, gfp);
9238 }
9239
9240 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9241                          struct net_device *netdev, const u8 *buf,
9242                          size_t len, gfp_t gfp)
9243 {
9244         nl80211_send_mlme_event(rdev, netdev, buf, len,
9245                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9246 }
9247
9248 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9249                            struct net_device *netdev, const u8 *buf,
9250                            size_t len, gfp_t gfp)
9251 {
9252         nl80211_send_mlme_event(rdev, netdev, buf, len,
9253                                 NL80211_CMD_DISASSOCIATE, gfp);
9254 }
9255
9256 void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
9257                                  size_t len)
9258 {
9259         struct wireless_dev *wdev = dev->ieee80211_ptr;
9260         struct wiphy *wiphy = wdev->wiphy;
9261         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9262
9263         trace_cfg80211_send_unprot_deauth(dev);
9264         nl80211_send_mlme_event(rdev, dev, buf, len,
9265                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, GFP_ATOMIC);
9266 }
9267 EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
9268
9269 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
9270                                    size_t len)
9271 {
9272         struct wireless_dev *wdev = dev->ieee80211_ptr;
9273         struct wiphy *wiphy = wdev->wiphy;
9274         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9275
9276         trace_cfg80211_send_unprot_disassoc(dev);
9277         nl80211_send_mlme_event(rdev, dev, buf, len,
9278                                 NL80211_CMD_UNPROT_DISASSOCIATE, GFP_ATOMIC);
9279 }
9280 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
9281
9282 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9283                                       struct net_device *netdev, int cmd,
9284                                       const u8 *addr, gfp_t gfp)
9285 {
9286         struct sk_buff *msg;
9287         void *hdr;
9288
9289         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9290         if (!msg)
9291                 return;
9292
9293         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9294         if (!hdr) {
9295                 nlmsg_free(msg);
9296                 return;
9297         }
9298
9299         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9300             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9301             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9302             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9303                 goto nla_put_failure;
9304
9305         genlmsg_end(msg, hdr);
9306
9307         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9308                                 nl80211_mlme_mcgrp.id, gfp);
9309         return;
9310
9311  nla_put_failure:
9312         genlmsg_cancel(msg, hdr);
9313         nlmsg_free(msg);
9314 }
9315
9316 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9317                                struct net_device *netdev, const u8 *addr,
9318                                gfp_t gfp)
9319 {
9320         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9321                                   addr, gfp);
9322 }
9323
9324 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9325                                 struct net_device *netdev, const u8 *addr,
9326                                 gfp_t gfp)
9327 {
9328         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9329                                   addr, gfp);
9330 }
9331
9332 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9333                                  struct net_device *netdev, const u8 *bssid,
9334                                  const u8 *req_ie, size_t req_ie_len,
9335                                  const u8 *resp_ie, size_t resp_ie_len,
9336                                  u16 status, gfp_t gfp)
9337 {
9338         struct sk_buff *msg;
9339         void *hdr;
9340
9341         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9342         if (!msg)
9343                 return;
9344
9345         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9346         if (!hdr) {
9347                 nlmsg_free(msg);
9348                 return;
9349         }
9350
9351         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9352             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9353             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9354             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9355             (req_ie &&
9356              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9357             (resp_ie &&
9358              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9359                 goto nla_put_failure;
9360
9361         genlmsg_end(msg, hdr);
9362
9363         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9364                                 nl80211_mlme_mcgrp.id, gfp);
9365         return;
9366
9367  nla_put_failure:
9368         genlmsg_cancel(msg, hdr);
9369         nlmsg_free(msg);
9370
9371 }
9372
9373 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9374                          struct net_device *netdev, const u8 *bssid,
9375                          const u8 *req_ie, size_t req_ie_len,
9376                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9377 {
9378         struct sk_buff *msg;
9379         void *hdr;
9380
9381         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9382         if (!msg)
9383                 return;
9384
9385         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9386         if (!hdr) {
9387                 nlmsg_free(msg);
9388                 return;
9389         }
9390
9391         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9392             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9393             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9394             (req_ie &&
9395              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9396             (resp_ie &&
9397              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9398                 goto nla_put_failure;
9399
9400         genlmsg_end(msg, hdr);
9401
9402         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9403                                 nl80211_mlme_mcgrp.id, gfp);
9404         return;
9405
9406  nla_put_failure:
9407         genlmsg_cancel(msg, hdr);
9408         nlmsg_free(msg);
9409
9410 }
9411
9412 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9413                                struct net_device *netdev, u16 reason,
9414                                const u8 *ie, size_t ie_len, bool from_ap)
9415 {
9416         struct sk_buff *msg;
9417         void *hdr;
9418
9419         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9420         if (!msg)
9421                 return;
9422
9423         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9424         if (!hdr) {
9425                 nlmsg_free(msg);
9426                 return;
9427         }
9428
9429         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9430             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9431             (from_ap && reason &&
9432              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9433             (from_ap &&
9434              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9435             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9436                 goto nla_put_failure;
9437
9438         genlmsg_end(msg, hdr);
9439
9440         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9441                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9442         return;
9443
9444  nla_put_failure:
9445         genlmsg_cancel(msg, hdr);
9446         nlmsg_free(msg);
9447
9448 }
9449
9450 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9451                              struct net_device *netdev, const u8 *bssid,
9452                              gfp_t gfp)
9453 {
9454         struct sk_buff *msg;
9455         void *hdr;
9456
9457         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9458         if (!msg)
9459                 return;
9460
9461         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9462         if (!hdr) {
9463                 nlmsg_free(msg);
9464                 return;
9465         }
9466
9467         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9468             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9469             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9470                 goto nla_put_failure;
9471
9472         genlmsg_end(msg, hdr);
9473
9474         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9475                                 nl80211_mlme_mcgrp.id, gfp);
9476         return;
9477
9478  nla_put_failure:
9479         genlmsg_cancel(msg, hdr);
9480         nlmsg_free(msg);
9481 }
9482
9483 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9484                                         const u8* ie, u8 ie_len, gfp_t gfp)
9485 {
9486         struct wireless_dev *wdev = dev->ieee80211_ptr;
9487         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9488         struct sk_buff *msg;
9489         void *hdr;
9490
9491         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9492                 return;
9493
9494         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9495
9496         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9497         if (!msg)
9498                 return;
9499
9500         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9501         if (!hdr) {
9502                 nlmsg_free(msg);
9503                 return;
9504         }
9505
9506         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9507             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9508             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9509             (ie_len && ie &&
9510              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9511                 goto nla_put_failure;
9512
9513         genlmsg_end(msg, hdr);
9514
9515         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9516                                 nl80211_mlme_mcgrp.id, gfp);
9517         return;
9518
9519  nla_put_failure:
9520         genlmsg_cancel(msg, hdr);
9521         nlmsg_free(msg);
9522 }
9523 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9524
9525 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9526                                  struct net_device *netdev, const u8 *addr,
9527                                  enum nl80211_key_type key_type, int key_id,
9528                                  const u8 *tsc, gfp_t gfp)
9529 {
9530         struct sk_buff *msg;
9531         void *hdr;
9532
9533         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9534         if (!msg)
9535                 return;
9536
9537         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9538         if (!hdr) {
9539                 nlmsg_free(msg);
9540                 return;
9541         }
9542
9543         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9544             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9545             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9546             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9547             (key_id != -1 &&
9548              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9549             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9550                 goto nla_put_failure;
9551
9552         genlmsg_end(msg, hdr);
9553
9554         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9555                                 nl80211_mlme_mcgrp.id, gfp);
9556         return;
9557
9558  nla_put_failure:
9559         genlmsg_cancel(msg, hdr);
9560         nlmsg_free(msg);
9561 }
9562
9563 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9564                                     struct ieee80211_channel *channel_before,
9565                                     struct ieee80211_channel *channel_after)
9566 {
9567         struct sk_buff *msg;
9568         void *hdr;
9569         struct nlattr *nl_freq;
9570
9571         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9572         if (!msg)
9573                 return;
9574
9575         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9576         if (!hdr) {
9577                 nlmsg_free(msg);
9578                 return;
9579         }
9580
9581         /*
9582          * Since we are applying the beacon hint to a wiphy we know its
9583          * wiphy_idx is valid
9584          */
9585         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9586                 goto nla_put_failure;
9587
9588         /* Before */
9589         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9590         if (!nl_freq)
9591                 goto nla_put_failure;
9592         if (nl80211_msg_put_channel(msg, channel_before, false))
9593                 goto nla_put_failure;
9594         nla_nest_end(msg, nl_freq);
9595
9596         /* After */
9597         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9598         if (!nl_freq)
9599                 goto nla_put_failure;
9600         if (nl80211_msg_put_channel(msg, channel_after, false))
9601                 goto nla_put_failure;
9602         nla_nest_end(msg, nl_freq);
9603
9604         genlmsg_end(msg, hdr);
9605
9606         rcu_read_lock();
9607         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9608                                 GFP_ATOMIC);
9609         rcu_read_unlock();
9610
9611         return;
9612
9613 nla_put_failure:
9614         genlmsg_cancel(msg, hdr);
9615         nlmsg_free(msg);
9616 }
9617
9618 static void nl80211_send_remain_on_chan_event(
9619         int cmd, struct cfg80211_registered_device *rdev,
9620         struct wireless_dev *wdev, u64 cookie,
9621         struct ieee80211_channel *chan,
9622         unsigned int duration, gfp_t gfp)
9623 {
9624         struct sk_buff *msg;
9625         void *hdr;
9626
9627         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9628         if (!msg)
9629                 return;
9630
9631         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9632         if (!hdr) {
9633                 nlmsg_free(msg);
9634                 return;
9635         }
9636
9637         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9638             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9639                                          wdev->netdev->ifindex)) ||
9640             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9641             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9642             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9643                         NL80211_CHAN_NO_HT) ||
9644             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9645                 goto nla_put_failure;
9646
9647         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9648             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9649                 goto nla_put_failure;
9650
9651         genlmsg_end(msg, hdr);
9652
9653         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9654                                 nl80211_mlme_mcgrp.id, gfp);
9655         return;
9656
9657  nla_put_failure:
9658         genlmsg_cancel(msg, hdr);
9659         nlmsg_free(msg);
9660 }
9661
9662 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9663                                struct ieee80211_channel *chan,
9664                                unsigned int duration, gfp_t gfp)
9665 {
9666         struct wiphy *wiphy = wdev->wiphy;
9667         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9668
9669         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9670         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9671                                           rdev, wdev, cookie, chan,
9672                                           duration, gfp);
9673 }
9674 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9675
9676 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9677                                         struct ieee80211_channel *chan,
9678                                         gfp_t gfp)
9679 {
9680         struct wiphy *wiphy = wdev->wiphy;
9681         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9682
9683         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9684         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9685                                           rdev, wdev, cookie, chan, 0, gfp);
9686 }
9687 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9688
9689 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9690                       struct station_info *sinfo, gfp_t gfp)
9691 {
9692         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9693         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9694         struct sk_buff *msg;
9695
9696         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9697
9698         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9699         if (!msg)
9700                 return;
9701
9702         if (nl80211_send_station(msg, 0, 0, 0,
9703                                  rdev, dev, mac_addr, sinfo) < 0) {
9704                 nlmsg_free(msg);
9705                 return;
9706         }
9707
9708         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9709                                 nl80211_mlme_mcgrp.id, gfp);
9710 }
9711 EXPORT_SYMBOL(cfg80211_new_sta);
9712
9713 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9714 {
9715         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9716         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9717         struct sk_buff *msg;
9718         void *hdr;
9719
9720         trace_cfg80211_del_sta(dev, mac_addr);
9721
9722         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9723         if (!msg)
9724                 return;
9725
9726         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9727         if (!hdr) {
9728                 nlmsg_free(msg);
9729                 return;
9730         }
9731
9732         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9733             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9734                 goto nla_put_failure;
9735
9736         genlmsg_end(msg, hdr);
9737
9738         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9739                                 nl80211_mlme_mcgrp.id, gfp);
9740         return;
9741
9742  nla_put_failure:
9743         genlmsg_cancel(msg, hdr);
9744         nlmsg_free(msg);
9745 }
9746 EXPORT_SYMBOL(cfg80211_del_sta);
9747
9748 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9749                           enum nl80211_connect_failed_reason reason,
9750                           gfp_t gfp)
9751 {
9752         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9753         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9754         struct sk_buff *msg;
9755         void *hdr;
9756
9757         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9758         if (!msg)
9759                 return;
9760
9761         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9762         if (!hdr) {
9763                 nlmsg_free(msg);
9764                 return;
9765         }
9766
9767         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9768             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9769             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9770                 goto nla_put_failure;
9771
9772         genlmsg_end(msg, hdr);
9773
9774         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9775                                 nl80211_mlme_mcgrp.id, gfp);
9776         return;
9777
9778  nla_put_failure:
9779         genlmsg_cancel(msg, hdr);
9780         nlmsg_free(msg);
9781 }
9782 EXPORT_SYMBOL(cfg80211_conn_failed);
9783
9784 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9785                                        const u8 *addr, gfp_t gfp)
9786 {
9787         struct wireless_dev *wdev = dev->ieee80211_ptr;
9788         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9789         struct sk_buff *msg;
9790         void *hdr;
9791         int err;
9792         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9793
9794         if (!nlportid)
9795                 return false;
9796
9797         msg = nlmsg_new(100, gfp);
9798         if (!msg)
9799                 return true;
9800
9801         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9802         if (!hdr) {
9803                 nlmsg_free(msg);
9804                 return true;
9805         }
9806
9807         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9808             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9809             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9810                 goto nla_put_failure;
9811
9812         err = genlmsg_end(msg, hdr);
9813         if (err < 0) {
9814                 nlmsg_free(msg);
9815                 return true;
9816         }
9817
9818         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9819         return true;
9820
9821  nla_put_failure:
9822         genlmsg_cancel(msg, hdr);
9823         nlmsg_free(msg);
9824         return true;
9825 }
9826
9827 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9828                                 const u8 *addr, gfp_t gfp)
9829 {
9830         struct wireless_dev *wdev = dev->ieee80211_ptr;
9831         bool ret;
9832
9833         trace_cfg80211_rx_spurious_frame(dev, addr);
9834
9835         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9836                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9837                 trace_cfg80211_return_bool(false);
9838                 return false;
9839         }
9840         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9841                                          addr, gfp);
9842         trace_cfg80211_return_bool(ret);
9843         return ret;
9844 }
9845 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9846
9847 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9848                                         const u8 *addr, gfp_t gfp)
9849 {
9850         struct wireless_dev *wdev = dev->ieee80211_ptr;
9851         bool ret;
9852
9853         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9854
9855         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9856                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9857                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9858                 trace_cfg80211_return_bool(false);
9859                 return false;
9860         }
9861         ret = __nl80211_unexpected_frame(dev,
9862                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9863                                          addr, gfp);
9864         trace_cfg80211_return_bool(ret);
9865         return ret;
9866 }
9867 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9868
9869 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9870                       struct wireless_dev *wdev, u32 nlportid,
9871                       int freq, int sig_dbm,
9872                       const u8 *buf, size_t len, gfp_t gfp)
9873 {
9874         struct net_device *netdev = wdev->netdev;
9875         struct sk_buff *msg;
9876         void *hdr;
9877
9878         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9879         if (!msg)
9880                 return -ENOMEM;
9881
9882         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9883         if (!hdr) {
9884                 nlmsg_free(msg);
9885                 return -ENOMEM;
9886         }
9887
9888         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9889             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9890                                         netdev->ifindex)) ||
9891             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9892             (sig_dbm &&
9893              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9894             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9895                 goto nla_put_failure;
9896
9897         genlmsg_end(msg, hdr);
9898
9899         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9900
9901  nla_put_failure:
9902         genlmsg_cancel(msg, hdr);
9903         nlmsg_free(msg);
9904         return -ENOBUFS;
9905 }
9906
9907 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
9908                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
9909 {
9910         struct wiphy *wiphy = wdev->wiphy;
9911         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9912         struct net_device *netdev = wdev->netdev;
9913         struct sk_buff *msg;
9914         void *hdr;
9915
9916         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
9917
9918         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9919         if (!msg)
9920                 return;
9921
9922         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9923         if (!hdr) {
9924                 nlmsg_free(msg);
9925                 return;
9926         }
9927
9928         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9929             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9930                                    netdev->ifindex)) ||
9931             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9932             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9933             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9934                 goto nla_put_failure;
9935
9936         genlmsg_end(msg, hdr);
9937
9938         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9939         return;
9940
9941  nla_put_failure:
9942         genlmsg_cancel(msg, hdr);
9943         nlmsg_free(msg);
9944 }
9945 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
9946
9947 void cfg80211_cqm_rssi_notify(struct net_device *dev,
9948                               enum nl80211_cqm_rssi_threshold_event rssi_event,
9949                               gfp_t gfp)
9950 {
9951         struct wireless_dev *wdev = dev->ieee80211_ptr;
9952         struct wiphy *wiphy = wdev->wiphy;
9953         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9954         struct sk_buff *msg;
9955         struct nlattr *pinfoattr;
9956         void *hdr;
9957
9958         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
9959
9960         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9961         if (!msg)
9962                 return;
9963
9964         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9965         if (!hdr) {
9966                 nlmsg_free(msg);
9967                 return;
9968         }
9969
9970         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9971             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
9972                 goto nla_put_failure;
9973
9974         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9975         if (!pinfoattr)
9976                 goto nla_put_failure;
9977
9978         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9979                         rssi_event))
9980                 goto nla_put_failure;
9981
9982         nla_nest_end(msg, pinfoattr);
9983
9984         genlmsg_end(msg, hdr);
9985
9986         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9987                                 nl80211_mlme_mcgrp.id, gfp);
9988         return;
9989
9990  nla_put_failure:
9991         genlmsg_cancel(msg, hdr);
9992         nlmsg_free(msg);
9993 }
9994 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
9995
9996 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9997                                      struct net_device *netdev, const u8 *bssid,
9998                                      const u8 *replay_ctr, gfp_t gfp)
9999 {
10000         struct sk_buff *msg;
10001         struct nlattr *rekey_attr;
10002         void *hdr;
10003
10004         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10005         if (!msg)
10006                 return;
10007
10008         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10009         if (!hdr) {
10010                 nlmsg_free(msg);
10011                 return;
10012         }
10013
10014         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10015             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10016             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10017                 goto nla_put_failure;
10018
10019         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10020         if (!rekey_attr)
10021                 goto nla_put_failure;
10022
10023         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10024                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10025                 goto nla_put_failure;
10026
10027         nla_nest_end(msg, rekey_attr);
10028
10029         genlmsg_end(msg, hdr);
10030
10031         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10032                                 nl80211_mlme_mcgrp.id, gfp);
10033         return;
10034
10035  nla_put_failure:
10036         genlmsg_cancel(msg, hdr);
10037         nlmsg_free(msg);
10038 }
10039
10040 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10041                                const u8 *replay_ctr, gfp_t gfp)
10042 {
10043         struct wireless_dev *wdev = dev->ieee80211_ptr;
10044         struct wiphy *wiphy = wdev->wiphy;
10045         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10046
10047         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10048         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10049 }
10050 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10051
10052 static void
10053 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10054                                struct net_device *netdev, int index,
10055                                const u8 *bssid, bool preauth, gfp_t gfp)
10056 {
10057         struct sk_buff *msg;
10058         struct nlattr *attr;
10059         void *hdr;
10060
10061         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10062         if (!msg)
10063                 return;
10064
10065         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10066         if (!hdr) {
10067                 nlmsg_free(msg);
10068                 return;
10069         }
10070
10071         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10072             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10073                 goto nla_put_failure;
10074
10075         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10076         if (!attr)
10077                 goto nla_put_failure;
10078
10079         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10080             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10081             (preauth &&
10082              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10083                 goto nla_put_failure;
10084
10085         nla_nest_end(msg, attr);
10086
10087         genlmsg_end(msg, hdr);
10088
10089         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10090                                 nl80211_mlme_mcgrp.id, gfp);
10091         return;
10092
10093  nla_put_failure:
10094         genlmsg_cancel(msg, hdr);
10095         nlmsg_free(msg);
10096 }
10097
10098 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10099                                      const u8 *bssid, bool preauth, gfp_t gfp)
10100 {
10101         struct wireless_dev *wdev = dev->ieee80211_ptr;
10102         struct wiphy *wiphy = wdev->wiphy;
10103         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10104
10105         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10106         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10107 }
10108 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10109
10110 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10111                                      struct net_device *netdev,
10112                                      struct cfg80211_chan_def *chandef,
10113                                      gfp_t gfp)
10114 {
10115         struct sk_buff *msg;
10116         void *hdr;
10117
10118         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10119         if (!msg)
10120                 return;
10121
10122         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10123         if (!hdr) {
10124                 nlmsg_free(msg);
10125                 return;
10126         }
10127
10128         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10129                 goto nla_put_failure;
10130
10131         if (nl80211_send_chandef(msg, chandef))
10132                 goto nla_put_failure;
10133
10134         genlmsg_end(msg, hdr);
10135
10136         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10137                                 nl80211_mlme_mcgrp.id, gfp);
10138         return;
10139
10140  nla_put_failure:
10141         genlmsg_cancel(msg, hdr);
10142         nlmsg_free(msg);
10143 }
10144
10145 void cfg80211_ch_switch_notify(struct net_device *dev,
10146                                struct cfg80211_chan_def *chandef)
10147 {
10148         struct wireless_dev *wdev = dev->ieee80211_ptr;
10149         struct wiphy *wiphy = wdev->wiphy;
10150         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10151
10152         trace_cfg80211_ch_switch_notify(dev, chandef);
10153
10154         wdev_lock(wdev);
10155
10156         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10157                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10158                 goto out;
10159
10160         wdev->channel = chandef->chan;
10161         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10162 out:
10163         wdev_unlock(wdev);
10164         return;
10165 }
10166 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10167
10168 void cfg80211_cqm_txe_notify(struct net_device *dev,
10169                              const u8 *peer, u32 num_packets,
10170                              u32 rate, u32 intvl, gfp_t gfp)
10171 {
10172         struct wireless_dev *wdev = dev->ieee80211_ptr;
10173         struct wiphy *wiphy = wdev->wiphy;
10174         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10175         struct sk_buff *msg;
10176         struct nlattr *pinfoattr;
10177         void *hdr;
10178
10179         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10180         if (!msg)
10181                 return;
10182
10183         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10184         if (!hdr) {
10185                 nlmsg_free(msg);
10186                 return;
10187         }
10188
10189         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10190             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10191             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10192                 goto nla_put_failure;
10193
10194         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10195         if (!pinfoattr)
10196                 goto nla_put_failure;
10197
10198         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10199                 goto nla_put_failure;
10200
10201         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10202                 goto nla_put_failure;
10203
10204         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10205                 goto nla_put_failure;
10206
10207         nla_nest_end(msg, pinfoattr);
10208
10209         genlmsg_end(msg, hdr);
10210
10211         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10212                                 nl80211_mlme_mcgrp.id, gfp);
10213         return;
10214
10215  nla_put_failure:
10216         genlmsg_cancel(msg, hdr);
10217         nlmsg_free(msg);
10218 }
10219 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10220
10221 void
10222 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10223                      struct cfg80211_chan_def *chandef,
10224                      enum nl80211_radar_event event,
10225                      struct net_device *netdev, gfp_t gfp)
10226 {
10227         struct sk_buff *msg;
10228         void *hdr;
10229
10230         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10231         if (!msg)
10232                 return;
10233
10234         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10235         if (!hdr) {
10236                 nlmsg_free(msg);
10237                 return;
10238         }
10239
10240         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10241                 goto nla_put_failure;
10242
10243         /* NOP and radar events don't need a netdev parameter */
10244         if (netdev) {
10245                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10246
10247                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10248                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10249                         goto nla_put_failure;
10250         }
10251
10252         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10253                 goto nla_put_failure;
10254
10255         if (nl80211_send_chandef(msg, chandef))
10256                 goto nla_put_failure;
10257
10258         if (genlmsg_end(msg, hdr) < 0) {
10259                 nlmsg_free(msg);
10260                 return;
10261         }
10262
10263         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10264                                 nl80211_mlme_mcgrp.id, gfp);
10265         return;
10266
10267  nla_put_failure:
10268         genlmsg_cancel(msg, hdr);
10269         nlmsg_free(msg);
10270 }
10271
10272 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10273                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10274 {
10275         struct wireless_dev *wdev = dev->ieee80211_ptr;
10276         struct wiphy *wiphy = wdev->wiphy;
10277         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10278         struct sk_buff *msg;
10279         struct nlattr *pinfoattr;
10280         void *hdr;
10281
10282         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10283
10284         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10285         if (!msg)
10286                 return;
10287
10288         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10289         if (!hdr) {
10290                 nlmsg_free(msg);
10291                 return;
10292         }
10293
10294         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10295             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10296             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10297                 goto nla_put_failure;
10298
10299         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10300         if (!pinfoattr)
10301                 goto nla_put_failure;
10302
10303         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10304                 goto nla_put_failure;
10305
10306         nla_nest_end(msg, pinfoattr);
10307
10308         genlmsg_end(msg, hdr);
10309
10310         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10311                                 nl80211_mlme_mcgrp.id, gfp);
10312         return;
10313
10314  nla_put_failure:
10315         genlmsg_cancel(msg, hdr);
10316         nlmsg_free(msg);
10317 }
10318 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10319
10320 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10321                            u64 cookie, bool acked, gfp_t gfp)
10322 {
10323         struct wireless_dev *wdev = dev->ieee80211_ptr;
10324         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10325         struct sk_buff *msg;
10326         void *hdr;
10327         int err;
10328
10329         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10330
10331         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10332
10333         if (!msg)
10334                 return;
10335
10336         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10337         if (!hdr) {
10338                 nlmsg_free(msg);
10339                 return;
10340         }
10341
10342         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10343             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10344             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10345             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10346             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10347                 goto nla_put_failure;
10348
10349         err = genlmsg_end(msg, hdr);
10350         if (err < 0) {
10351                 nlmsg_free(msg);
10352                 return;
10353         }
10354
10355         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10356                                 nl80211_mlme_mcgrp.id, gfp);
10357         return;
10358
10359  nla_put_failure:
10360         genlmsg_cancel(msg, hdr);
10361         nlmsg_free(msg);
10362 }
10363 EXPORT_SYMBOL(cfg80211_probe_status);
10364
10365 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10366                                  const u8 *frame, size_t len,
10367                                  int freq, int sig_dbm)
10368 {
10369         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10370         struct sk_buff *msg;
10371         void *hdr;
10372         struct cfg80211_beacon_registration *reg;
10373
10374         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10375
10376         spin_lock_bh(&rdev->beacon_registrations_lock);
10377         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10378                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10379                 if (!msg) {
10380                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10381                         return;
10382                 }
10383
10384                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10385                 if (!hdr)
10386                         goto nla_put_failure;
10387
10388                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10389                     (freq &&
10390                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10391                     (sig_dbm &&
10392                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10393                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10394                         goto nla_put_failure;
10395
10396                 genlmsg_end(msg, hdr);
10397
10398                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10399         }
10400         spin_unlock_bh(&rdev->beacon_registrations_lock);
10401         return;
10402
10403  nla_put_failure:
10404         spin_unlock_bh(&rdev->beacon_registrations_lock);
10405         if (hdr)
10406                 genlmsg_cancel(msg, hdr);
10407         nlmsg_free(msg);
10408 }
10409 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10410
10411 #ifdef CONFIG_PM
10412 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10413                                    struct cfg80211_wowlan_wakeup *wakeup,
10414                                    gfp_t gfp)
10415 {
10416         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10417         struct sk_buff *msg;
10418         void *hdr;
10419         int err, size = 200;
10420
10421         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10422
10423         if (wakeup)
10424                 size += wakeup->packet_present_len;
10425
10426         msg = nlmsg_new(size, gfp);
10427         if (!msg)
10428                 return;
10429
10430         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10431         if (!hdr)
10432                 goto free_msg;
10433
10434         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10435             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10436                 goto free_msg;
10437
10438         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10439                                         wdev->netdev->ifindex))
10440                 goto free_msg;
10441
10442         if (wakeup) {
10443                 struct nlattr *reasons;
10444
10445                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10446
10447                 if (wakeup->disconnect &&
10448                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10449                         goto free_msg;
10450                 if (wakeup->magic_pkt &&
10451                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10452                         goto free_msg;
10453                 if (wakeup->gtk_rekey_failure &&
10454                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10455                         goto free_msg;
10456                 if (wakeup->eap_identity_req &&
10457                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10458                         goto free_msg;
10459                 if (wakeup->four_way_handshake &&
10460                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10461                         goto free_msg;
10462                 if (wakeup->rfkill_release &&
10463                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10464                         goto free_msg;
10465
10466                 if (wakeup->pattern_idx >= 0 &&
10467                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10468                                 wakeup->pattern_idx))
10469                         goto free_msg;
10470
10471                 if (wakeup->tcp_match)
10472                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10473
10474                 if (wakeup->tcp_connlost)
10475                         nla_put_flag(msg,
10476                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10477
10478                 if (wakeup->tcp_nomoretokens)
10479                         nla_put_flag(msg,
10480                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10481
10482                 if (wakeup->packet) {
10483                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10484                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10485
10486                         if (!wakeup->packet_80211) {
10487                                 pkt_attr =
10488                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10489                                 len_attr =
10490                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10491                         }
10492
10493                         if (wakeup->packet_len &&
10494                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10495                                 goto free_msg;
10496
10497                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10498                                     wakeup->packet))
10499                                 goto free_msg;
10500                 }
10501
10502                 nla_nest_end(msg, reasons);
10503         }
10504
10505         err = genlmsg_end(msg, hdr);
10506         if (err < 0)
10507                 goto free_msg;
10508
10509         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10510                                 nl80211_mlme_mcgrp.id, gfp);
10511         return;
10512
10513  free_msg:
10514         nlmsg_free(msg);
10515 }
10516 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10517 #endif
10518
10519 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10520                                 enum nl80211_tdls_operation oper,
10521                                 u16 reason_code, gfp_t gfp)
10522 {
10523         struct wireless_dev *wdev = dev->ieee80211_ptr;
10524         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10525         struct sk_buff *msg;
10526         void *hdr;
10527         int err;
10528
10529         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10530                                          reason_code);
10531
10532         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10533         if (!msg)
10534                 return;
10535
10536         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10537         if (!hdr) {
10538                 nlmsg_free(msg);
10539                 return;
10540         }
10541
10542         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10543             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10544             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10545             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10546             (reason_code > 0 &&
10547              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10548                 goto nla_put_failure;
10549
10550         err = genlmsg_end(msg, hdr);
10551         if (err < 0) {
10552                 nlmsg_free(msg);
10553                 return;
10554         }
10555
10556         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10557                                 nl80211_mlme_mcgrp.id, gfp);
10558         return;
10559
10560  nla_put_failure:
10561         genlmsg_cancel(msg, hdr);
10562         nlmsg_free(msg);
10563 }
10564 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10565
10566 static int nl80211_netlink_notify(struct notifier_block * nb,
10567                                   unsigned long state,
10568                                   void *_notify)
10569 {
10570         struct netlink_notify *notify = _notify;
10571         struct cfg80211_registered_device *rdev;
10572         struct wireless_dev *wdev;
10573         struct cfg80211_beacon_registration *reg, *tmp;
10574
10575         if (state != NETLINK_URELEASE)
10576                 return NOTIFY_DONE;
10577
10578         rcu_read_lock();
10579
10580         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10581                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10582                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10583
10584                 spin_lock_bh(&rdev->beacon_registrations_lock);
10585                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10586                                          list) {
10587                         if (reg->nlportid == notify->portid) {
10588                                 list_del(&reg->list);
10589                                 kfree(reg);
10590                                 break;
10591                         }
10592                 }
10593                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10594         }
10595
10596         rcu_read_unlock();
10597
10598         return NOTIFY_DONE;
10599 }
10600
10601 static struct notifier_block nl80211_netlink_notifier = {
10602         .notifier_call = nl80211_netlink_notify,
10603 };
10604
10605 void cfg80211_ft_event(struct net_device *netdev,
10606                        struct cfg80211_ft_event_params *ft_event)
10607 {
10608         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
10609         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10610         struct sk_buff *msg;
10611         void *hdr;
10612         int err;
10613
10614         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
10615
10616         if (!ft_event->target_ap)
10617                 return;
10618
10619         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10620         if (!msg)
10621                 return;
10622
10623         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
10624         if (!hdr) {
10625                 nlmsg_free(msg);
10626                 return;
10627         }
10628
10629         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
10630         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
10631         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
10632         if (ft_event->ies)
10633                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
10634         if (ft_event->ric_ies)
10635                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
10636                         ft_event->ric_ies);
10637
10638         err = genlmsg_end(msg, hdr);
10639         if (err < 0) {
10640                 nlmsg_free(msg);
10641                 return;
10642         }
10643
10644         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10645                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10646 }
10647 EXPORT_SYMBOL(cfg80211_ft_event);
10648
10649 /* initialisation/exit functions */
10650
10651 int nl80211_init(void)
10652 {
10653         int err;
10654
10655         err = genl_register_family_with_ops(&nl80211_fam,
10656                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10657         if (err)
10658                 return err;
10659
10660         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10661         if (err)
10662                 goto err_out;
10663
10664         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10665         if (err)
10666                 goto err_out;
10667
10668         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10669         if (err)
10670                 goto err_out;
10671
10672         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10673         if (err)
10674                 goto err_out;
10675
10676 #ifdef CONFIG_NL80211_TESTMODE
10677         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10678         if (err)
10679                 goto err_out;
10680 #endif
10681
10682         err = netlink_register_notifier(&nl80211_netlink_notifier);
10683         if (err)
10684                 goto err_out;
10685
10686         return 0;
10687  err_out:
10688         genl_unregister_family(&nl80211_fam);
10689         return err;
10690 }
10691
10692 void nl80211_exit(void)
10693 {
10694         netlink_unregister_notifier(&nl80211_netlink_notifier);
10695         genl_unregister_family(&nl80211_fam);
10696 }