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_GENL_NAME,      /* 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_RTNL();
  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                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94
  95                 if (result)
  96                         break;
  97         }
  98
  99         if (result)
 100                 return result;
 101         return ERR_PTR(-ENODEV);
 102 }
 103
 104 static struct cfg80211_registered_device *
 105 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 106 {
 107         struct cfg80211_registered_device *rdev = NULL, *tmp;
 108         struct net_device *netdev;
 109
 110         ASSERT_RTNL();
 111
 112         if (!attrs[NL80211_ATTR_WIPHY] &&
 113             !attrs[NL80211_ATTR_IFINDEX] &&
 114             !attrs[NL80211_ATTR_WDEV])
 115                 return ERR_PTR(-EINVAL);
 116
 117         if (attrs[NL80211_ATTR_WIPHY])
 118                 rdev = cfg80211_rdev_by_wiphy_idx(
 119                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 120
 121         if (attrs[NL80211_ATTR_WDEV]) {
 122                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 123                 struct wireless_dev *wdev;
 124                 bool found = false;
 125
 126                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 127                 if (tmp) {
 128                         /* make sure wdev exists */
 129                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 130                                 if (wdev->identifier != (u32)wdev_id)
 131                                         continue;
 132                                 found = true;
 133                                 break;
 134                         }
 135
 136                         if (!found)
 137                                 tmp = NULL;
 138
 139                         if (rdev && tmp != rdev)
 140                                 return ERR_PTR(-EINVAL);
 141                         rdev = tmp;
 142                 }
 143         }
 144
 145         if (attrs[NL80211_ATTR_IFINDEX]) {
 146                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 147                 netdev = dev_get_by_index(netns, ifindex);
 148                 if (netdev) {
 149                         if (netdev->ieee80211_ptr)
 150                                 tmp = wiphy_to_dev(
 151                                                 netdev->ieee80211_ptr->wiphy);
 152                         else
 153                                 tmp = NULL;
 154
 155                         dev_put(netdev);
 156
 157                         /* not wireless device -- return error */
 158                         if (!tmp)
 159                                 return ERR_PTR(-EINVAL);
 160
 161                         /* mismatch -- return error */
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         rdev = tmp;
 166                 }
 167         }
 168
 169         if (!rdev)
 170                 return ERR_PTR(-ENODEV);
 171
 172         if (netns != wiphy_net(&rdev->wiphy))
 173                 return ERR_PTR(-ENODEV);
 174
 175         return rdev;
 176 }
 177
 178 /*
 179  * This function returns a pointer to the driver
 180  * that the genl_info item that is passed refers to.
 181  *
 182  * The result of this can be a PTR_ERR and hence must
 183  * be checked with IS_ERR() for errors.
 184  */
 185 static struct cfg80211_registered_device *
 186 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 187 {
 188         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 189 }
 190
 191 /* policy for the attributes */
 192 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 193         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 194         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 195                                       .len = 20-1 },
 196         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 197
 198         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 199         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 200         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 201         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 202         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 203
 204         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 205         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 206         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 207         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 208         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 209
 210         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 211         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 212         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 213
 214         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 215         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 216
 217         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 218         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 219                                     .len = WLAN_MAX_KEY_LEN },
 220         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 221         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 222         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 223         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 224         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 227         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 229                                        .len = IEEE80211_MAX_DATA_LEN },
 230         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 231                                        .len = IEEE80211_MAX_DATA_LEN },
 232         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 233         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 234         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 235         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 236                                                .len = NL80211_MAX_SUPP_RATES },
 237         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 238         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 239         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 240         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 241                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 242         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 243
 244         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 245         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 246
 247         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 248         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 249         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 250         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 251                                            .len = NL80211_MAX_SUPP_RATES },
 252         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 253
 254         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 255         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 256
 257         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 258
 259         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 261                               .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 264
 265         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 266                                 .len = IEEE80211_MAX_SSID_LEN },
 267         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 268         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 269         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 270         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 271         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 272         [NL80211_ATTR_STA_FLAGS2] = {
 273                 .len = sizeof(struct nl80211_sta_flag_update),
 274         },
 275         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 276         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 277         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 278         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 280         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 281         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 282         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 283         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 284                                  .len = WLAN_PMKID_LEN },
 285         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 286         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 287         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 288         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 289                                  .len = IEEE80211_MAX_DATA_LEN },
 290         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 291         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 292         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 293         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 295         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 296         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 297         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 300         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 301         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 303         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 304         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 305         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 306         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 308         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 309         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 310                                          .len = IEEE80211_MAX_DATA_LEN },
 311         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 312                                          .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 314         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 317         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 318         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 319         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 320         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 322         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 323                                       .len = IEEE80211_MAX_DATA_LEN },
 324         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 325         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 327                 .len = NL80211_HT_CAPABILITY_LEN
 328         },
 329         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 330         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 331         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 332         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 333         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 334         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 335         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 336         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 337         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 338         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 339         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 340         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 341         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 342         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 343         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 344         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 346                 .len = NL80211_VHT_CAPABILITY_LEN,
 347         },
 348         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 349         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 350                                   .len = IEEE80211_MAX_DATA_LEN },
 351         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 352 };
 353
 354 /* policy for the key attributes */
 355 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 356         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 357         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 358         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 359         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 360         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 361         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 362         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 363         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 364 };
 365
 366 /* policy for the key default flags */
 367 static const struct nla_policy
 368 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 369         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 370         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 371 };
 372
 373 /* policy for WoWLAN attributes */
 374 static const struct nla_policy
 375 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 376         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 377         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 378         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 379         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 380         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 381         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 382         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 383         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 384         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 385 };
 386
 387 static const struct nla_policy
 388 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 389         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 390         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 391         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 392         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 393         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 394         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 395         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 396                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 397         },
 398         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 399                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 400         },
 401         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 402         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 403         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 404 };
 405
 406 /* policy for GTK rekey offload attributes */
 407 static const struct nla_policy
 408 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 409         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 410         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 411         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 412 };
 413
 414 static const struct nla_policy
 415 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 416         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 417                                                  .len = IEEE80211_MAX_SSID_LEN },
 418         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 419 };
 420
 421 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 422                                      struct netlink_callback *cb,
 423                                      struct cfg80211_registered_device **rdev,
 424                                      struct wireless_dev **wdev)
 425 {
 426         int err;
 427
 428         rtnl_lock();
 429
 430         if (!cb->args[0]) {
 431                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 432                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 433                                   nl80211_policy);
 434                 if (err)
 435                         goto out_unlock;
 436
 437                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 438                                                    nl80211_fam.attrbuf);
 439                 if (IS_ERR(*wdev)) {
 440                         err = PTR_ERR(*wdev);
 441                         goto out_unlock;
 442                 }
 443                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 444                 cb->args[0] = (*rdev)->wiphy_idx;
 445                 cb->args[1] = (*wdev)->identifier;
 446         } else {
 447                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0]);
 448                 struct wireless_dev *tmp;
 449
 450                 if (!wiphy) {
 451                         err = -ENODEV;
 452                         goto out_unlock;
 453                 }
 454                 *rdev = wiphy_to_dev(wiphy);
 455                 *wdev = NULL;
 456
 457                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 458                         if (tmp->identifier == cb->args[1]) {
 459                                 *wdev = tmp;
 460                                 break;
 461                         }
 462                 }
 463
 464                 if (!*wdev) {
 465                         err = -ENODEV;
 466                         goto out_unlock;
 467                 }
 468         }
 469
 470         return 0;
 471  out_unlock:
 472         rtnl_unlock();
 473         return err;
 474 }
 475
 476 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 477 {
 478         rtnl_unlock();
 479 }
 480
 481 /* IE validation */
 482 static bool is_valid_ie_attr(const struct nlattr *attr)
 483 {
 484         const u8 *pos;
 485         int len;
 486
 487         if (!attr)
 488                 return true;
 489
 490         pos = nla_data(attr);
 491         len = nla_len(attr);
 492
 493         while (len) {
 494                 u8 elemlen;
 495
 496                 if (len < 2)
 497                         return false;
 498                 len -= 2;
 499
 500                 elemlen = pos[1];
 501                 if (elemlen > len)
 502                         return false;
 503
 504                 len -= elemlen;
 505                 pos += 2 + elemlen;
 506         }
 507
 508         return true;
 509 }
 510
 511 /* message building helper */
 512 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 513                                    int flags, u8 cmd)
 514 {
 515         /* since there is no private header just add the generic one */
 516         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 517 }
 518
 519 static int nl80211_msg_put_channel(struct sk_buff *msg,
 520                                    struct ieee80211_channel *chan,
 521                                    bool large)
 522 {
 523         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 524                         chan->center_freq))
 525                 goto nla_put_failure;
 526
 527         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 528             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 529                 goto nla_put_failure;
 530         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 531             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 532                 goto nla_put_failure;
 533         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 534             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 535                 goto nla_put_failure;
 536         if (chan->flags & IEEE80211_CHAN_RADAR) {
 537                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 538                         goto nla_put_failure;
 539                 if (large) {
 540                         u32 time;
 541
 542                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 543
 544                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 545                                         chan->dfs_state))
 546                                 goto nla_put_failure;
 547                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 548                                         time))
 549                                 goto nla_put_failure;
 550                 }
 551         }
 552
 553         if (large) {
 554                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 555                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 556                         goto nla_put_failure;
 557                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 558                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 559                         goto nla_put_failure;
 560                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 561                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 562                         goto nla_put_failure;
 563                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 564                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 565                         goto nla_put_failure;
 566         }
 567
 568         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 569                         DBM_TO_MBM(chan->max_power)))
 570                 goto nla_put_failure;
 571
 572         return 0;
 573
 574  nla_put_failure:
 575         return -ENOBUFS;
 576 }
 577
 578 /* netlink command implementations */
 579
 580 struct key_parse {
 581         struct key_params p;
 582         int idx;
 583         int type;
 584         bool def, defmgmt;
 585         bool def_uni, def_multi;
 586 };
 587
 588 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 589 {
 590         struct nlattr *tb[NL80211_KEY_MAX + 1];
 591         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 592                                    nl80211_key_policy);
 593         if (err)
 594                 return err;
 595
 596         k->def = !!tb[NL80211_KEY_DEFAULT];
 597         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 598
 599         if (k->def) {
 600                 k->def_uni = true;
 601                 k->def_multi = true;
 602         }
 603         if (k->defmgmt)
 604                 k->def_multi = true;
 605
 606         if (tb[NL80211_KEY_IDX])
 607                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 608
 609         if (tb[NL80211_KEY_DATA]) {
 610                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 611                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 612         }
 613
 614         if (tb[NL80211_KEY_SEQ]) {
 615                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 616                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 617         }
 618
 619         if (tb[NL80211_KEY_CIPHER])
 620                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 621
 622         if (tb[NL80211_KEY_TYPE]) {
 623                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 624                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 625                         return -EINVAL;
 626         }
 627
 628         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 629                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 630                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 631                                        tb[NL80211_KEY_DEFAULT_TYPES],
 632                                        nl80211_key_default_policy);
 633                 if (err)
 634                         return err;
 635
 636                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 637                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 638         }
 639
 640         return 0;
 641 }
 642
 643 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 644 {
 645         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 646                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 647                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 648         }
 649
 650         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 651                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 652                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 653         }
 654
 655         if (info->attrs[NL80211_ATTR_KEY_IDX])
 656                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 657
 658         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 659                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 660
 661         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 662         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 663
 664         if (k->def) {
 665                 k->def_uni = true;
 666                 k->def_multi = true;
 667         }
 668         if (k->defmgmt)
 669                 k->def_multi = true;
 670
 671         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 672                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 673                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 674                         return -EINVAL;
 675         }
 676
 677         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 678                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 679                 int err = nla_parse_nested(
 680                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 681                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 682                                 nl80211_key_default_policy);
 683                 if (err)
 684                         return err;
 685
 686                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 687                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 688         }
 689
 690         return 0;
 691 }
 692
 693 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 694 {
 695         int err;
 696
 697         memset(k, 0, sizeof(*k));
 698         k->idx = -1;
 699         k->type = -1;
 700
 701         if (info->attrs[NL80211_ATTR_KEY])
 702                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 703         else
 704                 err = nl80211_parse_key_old(info, k);
 705
 706         if (err)
 707                 return err;
 708
 709         if (k->def && k->defmgmt)
 710                 return -EINVAL;
 711
 712         if (k->defmgmt) {
 713                 if (k->def_uni || !k->def_multi)
 714                         return -EINVAL;
 715         }
 716
 717         if (k->idx != -1) {
 718                 if (k->defmgmt) {
 719                         if (k->idx < 4 || k->idx > 5)
 720                                 return -EINVAL;
 721                 } else if (k->def) {
 722                         if (k->idx < 0 || k->idx > 3)
 723                                 return -EINVAL;
 724                 } else {
 725                         if (k->idx < 0 || k->idx > 5)
 726                                 return -EINVAL;
 727                 }
 728         }
 729
 730         return 0;
 731 }
 732
 733 static struct cfg80211_cached_keys *
 734 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 735                        struct nlattr *keys, bool *no_ht)
 736 {
 737         struct key_parse parse;
 738         struct nlattr *key;
 739         struct cfg80211_cached_keys *result;
 740         int rem, err, def = 0;
 741
 742         result = kzalloc(sizeof(*result), GFP_KERNEL);
 743         if (!result)
 744                 return ERR_PTR(-ENOMEM);
 745
 746         result->def = -1;
 747         result->defmgmt = -1;
 748
 749         nla_for_each_nested(key, keys, rem) {
 750                 memset(&parse, 0, sizeof(parse));
 751                 parse.idx = -1;
 752
 753                 err = nl80211_parse_key_new(key, &parse);
 754                 if (err)
 755                         goto error;
 756                 err = -EINVAL;
 757                 if (!parse.p.key)
 758                         goto error;
 759                 if (parse.idx < 0 || parse.idx > 4)
 760                         goto error;
 761                 if (parse.def) {
 762                         if (def)
 763                                 goto error;
 764                         def = 1;
 765                         result->def = parse.idx;
 766                         if (!parse.def_uni || !parse.def_multi)
 767                                 goto error;
 768                 } else if (parse.defmgmt)
 769                         goto error;
 770                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 771                                                      parse.idx, false, NULL);
 772                 if (err)
 773                         goto error;
 774                 result->params[parse.idx].cipher = parse.p.cipher;
 775                 result->params[parse.idx].key_len = parse.p.key_len;
 776                 result->params[parse.idx].key = result->data[parse.idx];
 777                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 778
 779                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 780                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 781                         if (no_ht)
 782                                 *no_ht = true;
 783                 }
 784         }
 785
 786         return result;
 787  error:
 788         kfree(result);
 789         return ERR_PTR(err);
 790 }
 791
 792 static int nl80211_key_allowed(struct wireless_dev *wdev)
 793 {
 794         ASSERT_WDEV_LOCK(wdev);
 795
 796         switch (wdev->iftype) {
 797         case NL80211_IFTYPE_AP:
 798         case NL80211_IFTYPE_AP_VLAN:
 799         case NL80211_IFTYPE_P2P_GO:
 800         case NL80211_IFTYPE_MESH_POINT:
 801                 break;
 802         case NL80211_IFTYPE_ADHOC:
 803                 if (!wdev->current_bss)
 804                         return -ENOLINK;
 805                 break;
 806         case NL80211_IFTYPE_STATION:
 807         case NL80211_IFTYPE_P2P_CLIENT:
 808                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 809                         return -ENOLINK;
 810                 break;
 811         default:
 812                 return -EINVAL;
 813         }
 814
 815         return 0;
 816 }
 817
 818 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 819 {
 820         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 821         int i;
 822
 823         if (!nl_modes)
 824                 goto nla_put_failure;
 825
 826         i = 0;
 827         while (ifmodes) {
 828                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 829                         goto nla_put_failure;
 830                 ifmodes >>= 1;
 831                 i++;
 832         }
 833
 834         nla_nest_end(msg, nl_modes);
 835         return 0;
 836
 837 nla_put_failure:
 838         return -ENOBUFS;
 839 }
 840
 841 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 842                                           struct sk_buff *msg,
 843                                           bool large)
 844 {
 845         struct nlattr *nl_combis;
 846         int i, j;
 847
 848         nl_combis = nla_nest_start(msg,
 849                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 850         if (!nl_combis)
 851                 goto nla_put_failure;
 852
 853         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 854                 const struct ieee80211_iface_combination *c;
 855                 struct nlattr *nl_combi, *nl_limits;
 856
 857                 c = &wiphy->iface_combinations[i];
 858
 859                 nl_combi = nla_nest_start(msg, i + 1);
 860                 if (!nl_combi)
 861                         goto nla_put_failure;
 862
 863                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 864                 if (!nl_limits)
 865                         goto nla_put_failure;
 866
 867                 for (j = 0; j < c->n_limits; j++) {
 868                         struct nlattr *nl_limit;
 869
 870                         nl_limit = nla_nest_start(msg, j + 1);
 871                         if (!nl_limit)
 872                                 goto nla_put_failure;
 873                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 874                                         c->limits[j].max))
 875                                 goto nla_put_failure;
 876                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 877                                                 c->limits[j].types))
 878                                 goto nla_put_failure;
 879                         nla_nest_end(msg, nl_limit);
 880                 }
 881
 882                 nla_nest_end(msg, nl_limits);
 883
 884                 if (c->beacon_int_infra_match &&
 885                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 886                         goto nla_put_failure;
 887                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 888                                 c->num_different_channels) ||
 889                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 890                                 c->max_interfaces))
 891                         goto nla_put_failure;
 892                 if (large &&
 893                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 894                                 c->radar_detect_widths))
 895                         goto nla_put_failure;
 896
 897                 nla_nest_end(msg, nl_combi);
 898         }
 899
 900         nla_nest_end(msg, nl_combis);
 901
 902         return 0;
 903 nla_put_failure:
 904         return -ENOBUFS;
 905 }
 906
 907 #ifdef CONFIG_PM
 908 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 909                                         struct sk_buff *msg)
 910 {
 911         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
 912         struct nlattr *nl_tcp;
 913
 914         if (!tcp)
 915                 return 0;
 916
 917         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 918         if (!nl_tcp)
 919                 return -ENOBUFS;
 920
 921         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 922                         tcp->data_payload_max))
 923                 return -ENOBUFS;
 924
 925         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 926                         tcp->data_payload_max))
 927                 return -ENOBUFS;
 928
 929         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 930                 return -ENOBUFS;
 931
 932         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 933                                 sizeof(*tcp->tok), tcp->tok))
 934                 return -ENOBUFS;
 935
 936         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 937                         tcp->data_interval_max))
 938                 return -ENOBUFS;
 939
 940         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 941                         tcp->wake_payload_max))
 942                 return -ENOBUFS;
 943
 944         nla_nest_end(msg, nl_tcp);
 945         return 0;
 946 }
 947
 948 static int nl80211_send_wowlan(struct sk_buff *msg,
 949                                struct cfg80211_registered_device *dev,
 950                                bool large)
 951 {
 952         struct nlattr *nl_wowlan;
 953
 954         if (!dev->wiphy.wowlan.flags && !dev->wiphy.wowlan.n_patterns)
 955                 return 0;
 956
 957         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 958         if (!nl_wowlan)
 959                 return -ENOBUFS;
 960
 961         if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
 962              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 963             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
 964              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 965             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 966              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 967             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 968              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 969             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 970              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 971             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 972              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 973             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 974              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 975             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 976              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 977                 return -ENOBUFS;
 978
 979         if (dev->wiphy.wowlan.n_patterns) {
 980                 struct nl80211_wowlan_pattern_support pat = {
 981                         .max_patterns = dev->wiphy.wowlan.n_patterns,
 982                         .min_pattern_len = dev->wiphy.wowlan.pattern_min_len,
 983                         .max_pattern_len = dev->wiphy.wowlan.pattern_max_len,
 984                         .max_pkt_offset = dev->wiphy.wowlan.max_pkt_offset,
 985                 };
 986
 987                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 988                             sizeof(pat), &pat))
 989                         return -ENOBUFS;
 990         }
 991
 992         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
 993                 return -ENOBUFS;
 994
 995         nla_nest_end(msg, nl_wowlan);
 996
 997         return 0;
 998 }
 999 #endif
1000
1001 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1002                                       struct ieee80211_supported_band *sband)
1003 {
1004         struct nlattr *nl_rates, *nl_rate;
1005         struct ieee80211_rate *rate;
1006         int i;
1007
1008         /* add HT info */
1009         if (sband->ht_cap.ht_supported &&
1010             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1011                      sizeof(sband->ht_cap.mcs),
1012                      &sband->ht_cap.mcs) ||
1013              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1014                          sband->ht_cap.cap) ||
1015              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1016                         sband->ht_cap.ampdu_factor) ||
1017              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1018                         sband->ht_cap.ampdu_density)))
1019                 return -ENOBUFS;
1020
1021         /* add VHT info */
1022         if (sband->vht_cap.vht_supported &&
1023             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1024                      sizeof(sband->vht_cap.vht_mcs),
1025                      &sband->vht_cap.vht_mcs) ||
1026              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1027                          sband->vht_cap.cap)))
1028                 return -ENOBUFS;
1029
1030         /* add bitrates */
1031         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1032         if (!nl_rates)
1033                 return -ENOBUFS;
1034
1035         for (i = 0; i < sband->n_bitrates; i++) {
1036                 nl_rate = nla_nest_start(msg, i);
1037                 if (!nl_rate)
1038                         return -ENOBUFS;
1039
1040                 rate = &sband->bitrates[i];
1041                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1042                                 rate->bitrate))
1043                         return -ENOBUFS;
1044                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1045                     nla_put_flag(msg,
1046                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1047                         return -ENOBUFS;
1048
1049                 nla_nest_end(msg, nl_rate);
1050         }
1051
1052         nla_nest_end(msg, nl_rates);
1053
1054         return 0;
1055 }
1056
1057 static int
1058 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1059                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1060 {
1061         u16 stypes;
1062         struct nlattr *nl_ftypes, *nl_ifs;
1063         enum nl80211_iftype ift;
1064         int i;
1065
1066         if (!mgmt_stypes)
1067                 return 0;
1068
1069         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1070         if (!nl_ifs)
1071                 return -ENOBUFS;
1072
1073         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1074                 nl_ftypes = nla_nest_start(msg, ift);
1075                 if (!nl_ftypes)
1076                         return -ENOBUFS;
1077                 i = 0;
1078                 stypes = mgmt_stypes[ift].tx;
1079                 while (stypes) {
1080                         if ((stypes & 1) &&
1081                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1082                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1083                                 return -ENOBUFS;
1084                         stypes >>= 1;
1085                         i++;
1086                 }
1087                 nla_nest_end(msg, nl_ftypes);
1088         }
1089
1090         nla_nest_end(msg, nl_ifs);
1091
1092         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1093         if (!nl_ifs)
1094                 return -ENOBUFS;
1095
1096         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1097                 nl_ftypes = nla_nest_start(msg, ift);
1098                 if (!nl_ftypes)
1099                         return -ENOBUFS;
1100                 i = 0;
1101                 stypes = mgmt_stypes[ift].rx;
1102                 while (stypes) {
1103                         if ((stypes & 1) &&
1104                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1105                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1106                                 return -ENOBUFS;
1107                         stypes >>= 1;
1108                         i++;
1109                 }
1110                 nla_nest_end(msg, nl_ftypes);
1111         }
1112         nla_nest_end(msg, nl_ifs);
1113
1114         return 0;
1115 }
1116
1117 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1118                               struct sk_buff *msg, u32 portid, u32 seq,
1119                               int flags, bool split, long *split_start,
1120                               long *band_start, long *chan_start)
1121 {
1122         void *hdr;
1123         struct nlattr *nl_bands, *nl_band;
1124         struct nlattr *nl_freqs, *nl_freq;
1125         struct nlattr *nl_cmds;
1126         enum ieee80211_band band;
1127         struct ieee80211_channel *chan;
1128         int i;
1129         const struct ieee80211_txrx_stypes *mgmt_stypes =
1130                                 dev->wiphy.mgmt_stypes;
1131         long start = 0, start_chan = 0, start_band = 0;
1132         u32 features;
1133
1134         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1135         if (!hdr)
1136                 return -ENOBUFS;
1137
1138         /* allow always using the variables */
1139         if (!split) {
1140                 split_start = &start;
1141                 band_start = &start_band;
1142                 chan_start = &start_chan;
1143         }
1144
1145         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1146             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1147                            wiphy_name(&dev->wiphy)) ||
1148             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1149                         cfg80211_rdev_list_generation))
1150                 goto nla_put_failure;
1151
1152         switch (*split_start) {
1153         case 0:
1154                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1155                                dev->wiphy.retry_short) ||
1156                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1157                                dev->wiphy.retry_long) ||
1158                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1159                                 dev->wiphy.frag_threshold) ||
1160                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1161                                 dev->wiphy.rts_threshold) ||
1162                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1163                                dev->wiphy.coverage_class) ||
1164                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1165                                dev->wiphy.max_scan_ssids) ||
1166                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1167                                dev->wiphy.max_sched_scan_ssids) ||
1168                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1169                                 dev->wiphy.max_scan_ie_len) ||
1170                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1171                                 dev->wiphy.max_sched_scan_ie_len) ||
1172                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1173                                dev->wiphy.max_match_sets))
1174                         goto nla_put_failure;
1175
1176                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1177                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1178                         goto nla_put_failure;
1179                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1180                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1181                         goto nla_put_failure;
1182                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1183                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1184                         goto nla_put_failure;
1185                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1186                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1187                         goto nla_put_failure;
1188                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1189                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1190                         goto nla_put_failure;
1191                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1192                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1193                         goto nla_put_failure;
1194
1195                 (*split_start)++;
1196                 if (split)
1197                         break;
1198         case 1:
1199                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1200                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1201                             dev->wiphy.cipher_suites))
1202                         goto nla_put_failure;
1203
1204                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1205                                dev->wiphy.max_num_pmkids))
1206                         goto nla_put_failure;
1207
1208                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1209                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1210                         goto nla_put_failure;
1211
1212                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1213                                 dev->wiphy.available_antennas_tx) ||
1214                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1215                                 dev->wiphy.available_antennas_rx))
1216                         goto nla_put_failure;
1217
1218                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1219                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1220                                 dev->wiphy.probe_resp_offload))
1221                         goto nla_put_failure;
1222
1223                 if ((dev->wiphy.available_antennas_tx ||
1224                      dev->wiphy.available_antennas_rx) &&
1225                     dev->ops->get_antenna) {
1226                         u32 tx_ant = 0, rx_ant = 0;
1227                         int res;
1228                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1229                         if (!res) {
1230                                 if (nla_put_u32(msg,
1231                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1232                                                 tx_ant) ||
1233                                     nla_put_u32(msg,
1234                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1235                                                 rx_ant))
1236                                         goto nla_put_failure;
1237                         }
1238                 }
1239
1240                 (*split_start)++;
1241                 if (split)
1242                         break;
1243         case 2:
1244                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1245                                         dev->wiphy.interface_modes))
1246                                 goto nla_put_failure;
1247                 (*split_start)++;
1248                 if (split)
1249                         break;
1250         case 3:
1251                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1252                 if (!nl_bands)
1253                         goto nla_put_failure;
1254
1255                 for (band = *band_start; band < IEEE80211_NUM_BANDS; band++) {
1256                         struct ieee80211_supported_band *sband;
1257
1258                         sband = dev->wiphy.bands[band];
1259
1260                         if (!sband)
1261                                 continue;
1262
1263                         nl_band = nla_nest_start(msg, band);
1264                         if (!nl_band)
1265                                 goto nla_put_failure;
1266
1267                         switch (*chan_start) {
1268                         case 0:
1269                                 if (nl80211_send_band_rateinfo(msg, sband))
1270                                         goto nla_put_failure;
1271                                 (*chan_start)++;
1272                                 if (split)
1273                                         break;
1274                         default:
1275                                 /* add frequencies */
1276                                 nl_freqs = nla_nest_start(
1277                                         msg, NL80211_BAND_ATTR_FREQS);
1278                                 if (!nl_freqs)
1279                                         goto nla_put_failure;
1280
1281                                 for (i = *chan_start - 1;
1282                                      i < sband->n_channels;
1283                                      i++) {
1284                                         nl_freq = nla_nest_start(msg, i);
1285                                         if (!nl_freq)
1286                                                 goto nla_put_failure;
1287
1288                                         chan = &sband->channels[i];
1289
1290                                         if (nl80211_msg_put_channel(msg, chan,
1291                                                                     split))
1292                                                 goto nla_put_failure;
1293
1294                                         nla_nest_end(msg, nl_freq);
1295                                         if (split)
1296                                                 break;
1297                                 }
1298                                 if (i < sband->n_channels)
1299                                         *chan_start = i + 2;
1300                                 else
1301                                         *chan_start = 0;
1302                                 nla_nest_end(msg, nl_freqs);
1303                         }
1304
1305                         nla_nest_end(msg, nl_band);
1306
1307                         if (split) {
1308                                 /* start again here */
1309                                 if (*chan_start)
1310                                         band--;
1311                                 break;
1312                         }
1313                 }
1314                 nla_nest_end(msg, nl_bands);
1315
1316                 if (band < IEEE80211_NUM_BANDS)
1317                         *band_start = band + 1;
1318                 else
1319                         *band_start = 0;
1320
1321                 /* if bands & channels are done, continue outside */
1322                 if (*band_start == 0 && *chan_start == 0)
1323                         (*split_start)++;
1324                 if (split)
1325                         break;
1326         case 4:
1327                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1328                 if (!nl_cmds)
1329                         goto nla_put_failure;
1330
1331                 i = 0;
1332 #define CMD(op, n)                                                      \
1333                  do {                                                   \
1334                         if (dev->ops->op) {                             \
1335                                 i++;                                    \
1336                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1337                                         goto nla_put_failure;           \
1338                         }                                               \
1339                 } while (0)
1340
1341                 CMD(add_virtual_intf, NEW_INTERFACE);
1342                 CMD(change_virtual_intf, SET_INTERFACE);
1343                 CMD(add_key, NEW_KEY);
1344                 CMD(start_ap, START_AP);
1345                 CMD(add_station, NEW_STATION);
1346                 CMD(add_mpath, NEW_MPATH);
1347                 CMD(update_mesh_config, SET_MESH_CONFIG);
1348                 CMD(change_bss, SET_BSS);
1349                 CMD(auth, AUTHENTICATE);
1350                 CMD(assoc, ASSOCIATE);
1351                 CMD(deauth, DEAUTHENTICATE);
1352                 CMD(disassoc, DISASSOCIATE);
1353                 CMD(join_ibss, JOIN_IBSS);
1354                 CMD(join_mesh, JOIN_MESH);
1355                 CMD(set_pmksa, SET_PMKSA);
1356                 CMD(del_pmksa, DEL_PMKSA);
1357                 CMD(flush_pmksa, FLUSH_PMKSA);
1358                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1359                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1360                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1361                 CMD(mgmt_tx, FRAME);
1362                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1363                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1364                         i++;
1365                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1366                                 goto nla_put_failure;
1367                 }
1368                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1369                     dev->ops->join_mesh) {
1370                         i++;
1371                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1372                                 goto nla_put_failure;
1373                 }
1374                 CMD(set_wds_peer, SET_WDS_PEER);
1375                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1376                         CMD(tdls_mgmt, TDLS_MGMT);
1377                         CMD(tdls_oper, TDLS_OPER);
1378                 }
1379                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1380                         CMD(sched_scan_start, START_SCHED_SCAN);
1381                 CMD(probe_client, PROBE_CLIENT);
1382                 CMD(set_noack_map, SET_NOACK_MAP);
1383                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1384                         i++;
1385                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1386                                 goto nla_put_failure;
1387                 }
1388                 CMD(start_p2p_device, START_P2P_DEVICE);
1389                 CMD(set_mcast_rate, SET_MCAST_RATE);
1390                 if (split) {
1391                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1392                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1393                 }
1394
1395 #ifdef CONFIG_NL80211_TESTMODE
1396                 CMD(testmode_cmd, TESTMODE);
1397 #endif
1398
1399 #undef CMD
1400
1401                 if (dev->ops->connect || dev->ops->auth) {
1402                         i++;
1403                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1404                                 goto nla_put_failure;
1405                 }
1406
1407                 if (dev->ops->disconnect || dev->ops->deauth) {
1408                         i++;
1409                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1410                                 goto nla_put_failure;
1411                 }
1412
1413                 nla_nest_end(msg, nl_cmds);
1414                 (*split_start)++;
1415                 if (split)
1416                         break;
1417         case 5:
1418                 if (dev->ops->remain_on_channel &&
1419                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1420                     nla_put_u32(msg,
1421                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1422                                 dev->wiphy.max_remain_on_channel_duration))
1423                         goto nla_put_failure;
1424
1425                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1426                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1427                         goto nla_put_failure;
1428
1429                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1430                         goto nla_put_failure;
1431                 (*split_start)++;
1432                 if (split)
1433                         break;
1434         case 6:
1435 #ifdef CONFIG_PM
1436                 if (nl80211_send_wowlan(msg, dev, split))
1437                         goto nla_put_failure;
1438                 (*split_start)++;
1439                 if (split)
1440                         break;
1441 #else
1442                 (*split_start)++;
1443 #endif
1444         case 7:
1445                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1446                                         dev->wiphy.software_iftypes))
1447                         goto nla_put_failure;
1448
1449                 if (nl80211_put_iface_combinations(&dev->wiphy, msg, split))
1450                         goto nla_put_failure;
1451
1452                 (*split_start)++;
1453                 if (split)
1454                         break;
1455         case 8:
1456                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1457                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1458                                 dev->wiphy.ap_sme_capa))
1459                         goto nla_put_failure;
1460
1461                 features = dev->wiphy.features;
1462                 /*
1463                  * We can only add the per-channel limit information if the
1464                  * dump is split, otherwise it makes it too big. Therefore
1465                  * only advertise it in that case.
1466                  */
1467                 if (split)
1468                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1469                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1470                         goto nla_put_failure;
1471
1472                 if (dev->wiphy.ht_capa_mod_mask &&
1473                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1474                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1475                             dev->wiphy.ht_capa_mod_mask))
1476                         goto nla_put_failure;
1477
1478                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1479                     dev->wiphy.max_acl_mac_addrs &&
1480                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1481                                 dev->wiphy.max_acl_mac_addrs))
1482                         goto nla_put_failure;
1483
1484                 /*
1485                  * Any information below this point is only available to
1486                  * applications that can deal with it being split. This
1487                  * helps ensure that newly added capabilities don't break
1488                  * older tools by overrunning their buffers.
1489                  *
1490                  * We still increment split_start so that in the split
1491                  * case we'll continue with more data in the next round,
1492                  * but break unconditionally so unsplit data stops here.
1493                  */
1494                 (*split_start)++;
1495                 break;
1496         case 9:
1497                 if (dev->wiphy.extended_capabilities &&
1498                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1499                              dev->wiphy.extended_capabilities_len,
1500                              dev->wiphy.extended_capabilities) ||
1501                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1502                              dev->wiphy.extended_capabilities_len,
1503                              dev->wiphy.extended_capabilities_mask)))
1504                         goto nla_put_failure;
1505
1506                 if (dev->wiphy.vht_capa_mod_mask &&
1507                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1508                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1509                             dev->wiphy.vht_capa_mod_mask))
1510                         goto nla_put_failure;
1511
1512                 /* done */
1513                 *split_start = 0;
1514                 break;
1515         }
1516         return genlmsg_end(msg, hdr);
1517
1518  nla_put_failure:
1519         genlmsg_cancel(msg, hdr);
1520         return -EMSGSIZE;
1521 }
1522
1523 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1524 {
1525         int idx = 0, ret;
1526         int start = cb->args[0];
1527         struct cfg80211_registered_device *dev;
1528         s64 filter_wiphy = -1;
1529         bool split = false;
1530         struct nlattr **tb = nl80211_fam.attrbuf;
1531         int res;
1532
1533         rtnl_lock();
1534         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1535                           tb, nl80211_fam.maxattr, nl80211_policy);
1536         if (res == 0) {
1537                 split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1538                 if (tb[NL80211_ATTR_WIPHY])
1539                         filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1540                 if (tb[NL80211_ATTR_WDEV])
1541                         filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1542                 if (tb[NL80211_ATTR_IFINDEX]) {
1543                         struct net_device *netdev;
1544                         int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1545
1546                         netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1547                         if (!netdev)
1548                                 return -ENODEV;
1549                         if (netdev->ieee80211_ptr) {
1550                                 dev = wiphy_to_dev(
1551                                         netdev->ieee80211_ptr->wiphy);
1552                                 filter_wiphy = dev->wiphy_idx;
1553                         }
1554                         dev_put(netdev);
1555                 }
1556         }
1557
1558         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1559                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1560                         continue;
1561                 if (++idx <= start)
1562                         continue;
1563                 if (filter_wiphy != -1 && dev->wiphy_idx != filter_wiphy)
1564                         continue;
1565                 /* attempt to fit multiple wiphy data chunks into the skb */
1566                 do {
1567                         ret = nl80211_send_wiphy(dev, skb,
1568                                                  NETLINK_CB(cb->skb).portid,
1569                                                  cb->nlh->nlmsg_seq,
1570                                                  NLM_F_MULTI,
1571                                                  split, &cb->args[1],
1572                                                  &cb->args[2],
1573                                                  &cb->args[3]);
1574                         if (ret < 0) {
1575                                 /*
1576                                  * If sending the wiphy data didn't fit (ENOBUFS
1577                                  * or EMSGSIZE returned), this SKB is still
1578                                  * empty (so it's not too big because another
1579                                  * wiphy dataset is already in the skb) and
1580                                  * we've not tried to adjust the dump allocation
1581                                  * yet ... then adjust the alloc size to be
1582                                  * bigger, and return 1 but with the empty skb.
1583                                  * This results in an empty message being RX'ed
1584                                  * in userspace, but that is ignored.
1585                                  *
1586                                  * We can then retry with the larger buffer.
1587                                  */
1588                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1589                                     !skb->len &&
1590                                     cb->min_dump_alloc < 4096) {
1591                                         cb->min_dump_alloc = 4096;
1592                                         return 1;
1593                                 }
1594                                 idx--;
1595                                 break;
1596                         }
1597                 } while (cb->args[1] > 0);
1598                 break;
1599         }
1600         rtnl_unlock();
1601
1602         cb->args[0] = idx;
1603
1604         return skb->len;
1605 }
1606
1607 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1608 {
1609         struct sk_buff *msg;
1610         struct cfg80211_registered_device *dev = info->user_ptr[0];
1611
1612         msg = nlmsg_new(4096, GFP_KERNEL);
1613         if (!msg)
1614                 return -ENOMEM;
1615
1616         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1617                                false, NULL, NULL, NULL) < 0) {
1618                 nlmsg_free(msg);
1619                 return -ENOBUFS;
1620         }
1621
1622         return genlmsg_reply(msg, info);
1623 }
1624
1625 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1626         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1627         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1628         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1629         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1630         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1631 };
1632
1633 static int parse_txq_params(struct nlattr *tb[],
1634                             struct ieee80211_txq_params *txq_params)
1635 {
1636         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1637             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1638             !tb[NL80211_TXQ_ATTR_AIFS])
1639                 return -EINVAL;
1640
1641         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1642         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1643         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1644         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1645         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1646
1647         if (txq_params->ac >= NL80211_NUM_ACS)
1648                 return -EINVAL;
1649
1650         return 0;
1651 }
1652
1653 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1654 {
1655         /*
1656          * You can only set the channel explicitly for WDS interfaces,
1657          * all others have their channel managed via their respective
1658          * "establish a connection" command (connect, join, ...)
1659          *
1660          * For AP/GO and mesh mode, the channel can be set with the
1661          * channel userspace API, but is only stored and passed to the
1662          * low-level driver when the AP starts or the mesh is joined.
1663          * This is for backward compatibility, userspace can also give
1664          * the channel in the start-ap or join-mesh commands instead.
1665          *
1666          * Monitors are special as they are normally slaved to
1667          * whatever else is going on, so they have their own special
1668          * operation to set the monitor channel if possible.
1669          */
1670         return !wdev ||
1671                 wdev->iftype == NL80211_IFTYPE_AP ||
1672                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1673                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1674                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1675 }
1676
1677 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1678                                  struct genl_info *info,
1679                                  struct cfg80211_chan_def *chandef)
1680 {
1681         u32 control_freq;
1682
1683         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1684                 return -EINVAL;
1685
1686         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1687
1688         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1689         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1690         chandef->center_freq1 = control_freq;
1691         chandef->center_freq2 = 0;
1692
1693         /* Primary channel not allowed */
1694         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1695                 return -EINVAL;
1696
1697         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1698                 enum nl80211_channel_type chantype;
1699
1700                 chantype = nla_get_u32(
1701                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1702
1703                 switch (chantype) {
1704                 case NL80211_CHAN_NO_HT:
1705                 case NL80211_CHAN_HT20:
1706                 case NL80211_CHAN_HT40PLUS:
1707                 case NL80211_CHAN_HT40MINUS:
1708                         cfg80211_chandef_create(chandef, chandef->chan,
1709                                                 chantype);
1710                         break;
1711                 default:
1712                         return -EINVAL;
1713                 }
1714         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1715                 chandef->width =
1716                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1717                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1718                         chandef->center_freq1 =
1719                                 nla_get_u32(
1720                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1721                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1722                         chandef->center_freq2 =
1723                                 nla_get_u32(
1724                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1725         }
1726
1727         if (!cfg80211_chandef_valid(chandef))
1728                 return -EINVAL;
1729
1730         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1731                                      IEEE80211_CHAN_DISABLED))
1732                 return -EINVAL;
1733
1734         return 0;
1735 }
1736
1737 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1738                                  struct wireless_dev *wdev,
1739                                  struct genl_info *info)
1740 {
1741         struct cfg80211_chan_def chandef;
1742         int result;
1743         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1744
1745         if (wdev)
1746                 iftype = wdev->iftype;
1747
1748         if (!nl80211_can_set_dev_channel(wdev))
1749                 return -EOPNOTSUPP;
1750
1751         result = nl80211_parse_chandef(rdev, info, &chandef);
1752         if (result)
1753                 return result;
1754
1755         switch (iftype) {
1756         case NL80211_IFTYPE_AP:
1757         case NL80211_IFTYPE_P2P_GO:
1758                 if (wdev->beacon_interval) {
1759                         result = -EBUSY;
1760                         break;
1761                 }
1762                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1763                         result = -EINVAL;
1764                         break;
1765                 }
1766                 wdev->preset_chandef = chandef;
1767                 result = 0;
1768                 break;
1769         case NL80211_IFTYPE_MESH_POINT:
1770                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1771                 break;
1772         case NL80211_IFTYPE_MONITOR:
1773                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1774                 break;
1775         default:
1776                 result = -EINVAL;
1777         }
1778
1779         return result;
1780 }
1781
1782 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1783 {
1784         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1785         struct net_device *netdev = info->user_ptr[1];
1786
1787         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1788 }
1789
1790 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1791 {
1792         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1793         struct net_device *dev = info->user_ptr[1];
1794         struct wireless_dev *wdev = dev->ieee80211_ptr;
1795         const u8 *bssid;
1796
1797         if (!info->attrs[NL80211_ATTR_MAC])
1798                 return -EINVAL;
1799
1800         if (netif_running(dev))
1801                 return -EBUSY;
1802
1803         if (!rdev->ops->set_wds_peer)
1804                 return -EOPNOTSUPP;
1805
1806         if (wdev->iftype != NL80211_IFTYPE_WDS)
1807                 return -EOPNOTSUPP;
1808
1809         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1810         return rdev_set_wds_peer(rdev, dev, bssid);
1811 }
1812
1813
1814 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1815 {
1816         struct cfg80211_registered_device *rdev;
1817         struct net_device *netdev = NULL;
1818         struct wireless_dev *wdev;
1819         int result = 0, rem_txq_params = 0;
1820         struct nlattr *nl_txq_params;
1821         u32 changed;
1822         u8 retry_short = 0, retry_long = 0;
1823         u32 frag_threshold = 0, rts_threshold = 0;
1824         u8 coverage_class = 0;
1825
1826         ASSERT_RTNL();
1827
1828         /*
1829          * Try to find the wiphy and netdev. Normally this
1830          * function shouldn't need the netdev, but this is
1831          * done for backward compatibility -- previously
1832          * setting the channel was done per wiphy, but now
1833          * it is per netdev. Previous userland like hostapd
1834          * also passed a netdev to set_wiphy, so that it is
1835          * possible to let that go to the right netdev!
1836          */
1837
1838         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1839                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1840
1841                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1842                 if (netdev && netdev->ieee80211_ptr)
1843                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1844                 else
1845                         netdev = NULL;
1846         }
1847
1848         if (!netdev) {
1849                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1850                                                   info->attrs);
1851                 if (IS_ERR(rdev))
1852                         return PTR_ERR(rdev);
1853                 wdev = NULL;
1854                 netdev = NULL;
1855                 result = 0;
1856         } else
1857                 wdev = netdev->ieee80211_ptr;
1858
1859         /*
1860          * end workaround code, by now the rdev is available
1861          * and locked, and wdev may or may not be NULL.
1862          */
1863
1864         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1865                 result = cfg80211_dev_rename(
1866                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1867
1868         if (result)
1869                 goto bad_res;
1870
1871         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1872                 struct ieee80211_txq_params txq_params;
1873                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1874
1875                 if (!rdev->ops->set_txq_params) {
1876                         result = -EOPNOTSUPP;
1877                         goto bad_res;
1878                 }
1879
1880                 if (!netdev) {
1881                         result = -EINVAL;
1882                         goto bad_res;
1883                 }
1884
1885                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1886                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1887                         result = -EINVAL;
1888                         goto bad_res;
1889                 }
1890
1891                 if (!netif_running(netdev)) {
1892                         result = -ENETDOWN;
1893                         goto bad_res;
1894                 }
1895
1896                 nla_for_each_nested(nl_txq_params,
1897                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1898                                     rem_txq_params) {
1899                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1900                                   nla_data(nl_txq_params),
1901                                   nla_len(nl_txq_params),
1902                                   txq_params_policy);
1903                         result = parse_txq_params(tb, &txq_params);
1904                         if (result)
1905                                 goto bad_res;
1906
1907                         result = rdev_set_txq_params(rdev, netdev,
1908                                                      &txq_params);
1909                         if (result)
1910                                 goto bad_res;
1911                 }
1912         }
1913
1914         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1915                 result = __nl80211_set_channel(rdev,
1916                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1917                                 info);
1918                 if (result)
1919                         goto bad_res;
1920         }
1921
1922         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1923                 struct wireless_dev *txp_wdev = wdev;
1924                 enum nl80211_tx_power_setting type;
1925                 int idx, mbm = 0;
1926
1927                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1928                         txp_wdev = NULL;
1929
1930                 if (!rdev->ops->set_tx_power) {
1931                         result = -EOPNOTSUPP;
1932                         goto bad_res;
1933                 }
1934
1935                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1936                 type = nla_get_u32(info->attrs[idx]);
1937
1938                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1939                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1940                         result = -EINVAL;
1941                         goto bad_res;
1942                 }
1943
1944                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1945                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1946                         mbm = nla_get_u32(info->attrs[idx]);
1947                 }
1948
1949                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1950                 if (result)
1951                         goto bad_res;
1952         }
1953
1954         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1955             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1956                 u32 tx_ant, rx_ant;
1957                 if ((!rdev->wiphy.available_antennas_tx &&
1958                      !rdev->wiphy.available_antennas_rx) ||
1959                     !rdev->ops->set_antenna) {
1960                         result = -EOPNOTSUPP;
1961                         goto bad_res;
1962                 }
1963
1964                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1965                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1966
1967                 /* reject antenna configurations which don't match the
1968                  * available antenna masks, except for the "all" mask */
1969                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1970                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1971                         result = -EINVAL;
1972                         goto bad_res;
1973                 }
1974
1975                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1976                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1977
1978                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1979                 if (result)
1980                         goto bad_res;
1981         }
1982
1983         changed = 0;
1984
1985         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1986                 retry_short = nla_get_u8(
1987                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1988                 if (retry_short == 0) {
1989                         result = -EINVAL;
1990                         goto bad_res;
1991                 }
1992                 changed |= WIPHY_PARAM_RETRY_SHORT;
1993         }
1994
1995         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1996                 retry_long = nla_get_u8(
1997                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1998                 if (retry_long == 0) {
1999                         result = -EINVAL;
2000                         goto bad_res;
2001                 }
2002                 changed |= WIPHY_PARAM_RETRY_LONG;
2003         }
2004
2005         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2006                 frag_threshold = nla_get_u32(
2007                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2008                 if (frag_threshold < 256) {
2009                         result = -EINVAL;
2010                         goto bad_res;
2011                 }
2012                 if (frag_threshold != (u32) -1) {
2013                         /*
2014                          * Fragments (apart from the last one) are required to
2015                          * have even length. Make the fragmentation code
2016                          * simpler by stripping LSB should someone try to use
2017                          * odd threshold value.
2018                          */
2019                         frag_threshold &= ~0x1;
2020                 }
2021                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2022         }
2023
2024         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2025                 rts_threshold = nla_get_u32(
2026                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2027                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2028         }
2029
2030         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2031                 coverage_class = nla_get_u8(
2032                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2033                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2034         }
2035
2036         if (changed) {
2037                 u8 old_retry_short, old_retry_long;
2038                 u32 old_frag_threshold, old_rts_threshold;
2039                 u8 old_coverage_class;
2040
2041                 if (!rdev->ops->set_wiphy_params) {
2042                         result = -EOPNOTSUPP;
2043                         goto bad_res;
2044                 }
2045
2046                 old_retry_short = rdev->wiphy.retry_short;
2047                 old_retry_long = rdev->wiphy.retry_long;
2048                 old_frag_threshold = rdev->wiphy.frag_threshold;
2049                 old_rts_threshold = rdev->wiphy.rts_threshold;
2050                 old_coverage_class = rdev->wiphy.coverage_class;
2051
2052                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2053                         rdev->wiphy.retry_short = retry_short;
2054                 if (changed & WIPHY_PARAM_RETRY_LONG)
2055                         rdev->wiphy.retry_long = retry_long;
2056                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2057                         rdev->wiphy.frag_threshold = frag_threshold;
2058                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2059                         rdev->wiphy.rts_threshold = rts_threshold;
2060                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2061                         rdev->wiphy.coverage_class = coverage_class;
2062
2063                 result = rdev_set_wiphy_params(rdev, changed);
2064                 if (result) {
2065                         rdev->wiphy.retry_short = old_retry_short;
2066                         rdev->wiphy.retry_long = old_retry_long;
2067                         rdev->wiphy.frag_threshold = old_frag_threshold;
2068                         rdev->wiphy.rts_threshold = old_rts_threshold;
2069                         rdev->wiphy.coverage_class = old_coverage_class;
2070                 }
2071         }
2072
2073  bad_res:
2074         if (netdev)
2075                 dev_put(netdev);
2076         return result;
2077 }
2078
2079 static inline u64 wdev_id(struct wireless_dev *wdev)
2080 {
2081         return (u64)wdev->identifier |
2082                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2083 }
2084
2085 static int nl80211_send_chandef(struct sk_buff *msg,
2086                                  struct cfg80211_chan_def *chandef)
2087 {
2088         WARN_ON(!cfg80211_chandef_valid(chandef));
2089
2090         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2091                         chandef->chan->center_freq))
2092                 return -ENOBUFS;
2093         switch (chandef->width) {
2094         case NL80211_CHAN_WIDTH_20_NOHT:
2095         case NL80211_CHAN_WIDTH_20:
2096         case NL80211_CHAN_WIDTH_40:
2097                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2098                                 cfg80211_get_chandef_type(chandef)))
2099                         return -ENOBUFS;
2100                 break;
2101         default:
2102                 break;
2103         }
2104         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2105                 return -ENOBUFS;
2106         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2107                 return -ENOBUFS;
2108         if (chandef->center_freq2 &&
2109             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2110                 return -ENOBUFS;
2111         return 0;
2112 }
2113
2114 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2115                               struct cfg80211_registered_device *rdev,
2116                               struct wireless_dev *wdev)
2117 {
2118         struct net_device *dev = wdev->netdev;
2119         void *hdr;
2120
2121         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2122         if (!hdr)
2123                 return -1;
2124
2125         if (dev &&
2126             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2127              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2128                 goto nla_put_failure;
2129
2130         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2131             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2132             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2133             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2134             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2135                         rdev->devlist_generation ^
2136                         (cfg80211_rdev_list_generation << 2)))
2137                 goto nla_put_failure;
2138
2139         if (rdev->ops->get_channel) {
2140                 int ret;
2141                 struct cfg80211_chan_def chandef;
2142
2143                 ret = rdev_get_channel(rdev, wdev, &chandef);
2144                 if (ret == 0) {
2145                         if (nl80211_send_chandef(msg, &chandef))
2146                                 goto nla_put_failure;
2147                 }
2148         }
2149
2150         if (wdev->ssid_len) {
2151                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2152                         goto nla_put_failure;
2153         }
2154
2155         return genlmsg_end(msg, hdr);
2156
2157  nla_put_failure:
2158         genlmsg_cancel(msg, hdr);
2159         return -EMSGSIZE;
2160 }
2161
2162 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2163 {
2164         int wp_idx = 0;
2165         int if_idx = 0;
2166         int wp_start = cb->args[0];
2167         int if_start = cb->args[1];
2168         struct cfg80211_registered_device *rdev;
2169         struct wireless_dev *wdev;
2170
2171         rtnl_lock();
2172         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2173                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2174                         continue;
2175                 if (wp_idx < wp_start) {
2176                         wp_idx++;
2177                         continue;
2178                 }
2179                 if_idx = 0;
2180
2181                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2182                         if (if_idx < if_start) {
2183                                 if_idx++;
2184                                 continue;
2185                         }
2186                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2187                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2188                                                rdev, wdev) < 0) {
2189                                 goto out;
2190                         }
2191                         if_idx++;
2192                 }
2193
2194                 wp_idx++;
2195         }
2196  out:
2197         rtnl_unlock();
2198
2199         cb->args[0] = wp_idx;
2200         cb->args[1] = if_idx;
2201
2202         return skb->len;
2203 }
2204
2205 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2206 {
2207         struct sk_buff *msg;
2208         struct cfg80211_registered_device *dev = info->user_ptr[0];
2209         struct wireless_dev *wdev = info->user_ptr[1];
2210
2211         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2212         if (!msg)
2213                 return -ENOMEM;
2214
2215         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2216                                dev, wdev) < 0) {
2217                 nlmsg_free(msg);
2218                 return -ENOBUFS;
2219         }
2220
2221         return genlmsg_reply(msg, info);
2222 }
2223
2224 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2225         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2226         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2227         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2228         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2229         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2230 };
2231
2232 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2233 {
2234         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2235         int flag;
2236
2237         *mntrflags = 0;
2238
2239         if (!nla)
2240                 return -EINVAL;
2241
2242         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2243                              nla, mntr_flags_policy))
2244                 return -EINVAL;
2245
2246         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2247                 if (flags[flag])
2248                         *mntrflags |= (1<<flag);
2249
2250         return 0;
2251 }
2252
2253 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2254                                struct net_device *netdev, u8 use_4addr,
2255                                enum nl80211_iftype iftype)
2256 {
2257         if (!use_4addr) {
2258                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2259                         return -EBUSY;
2260                 return 0;
2261         }
2262
2263         switch (iftype) {
2264         case NL80211_IFTYPE_AP_VLAN:
2265                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2266                         return 0;
2267                 break;
2268         case NL80211_IFTYPE_STATION:
2269                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2270                         return 0;
2271                 break;
2272         default:
2273                 break;
2274         }
2275
2276         return -EOPNOTSUPP;
2277 }
2278
2279 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2280 {
2281         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2282         struct vif_params params;
2283         int err;
2284         enum nl80211_iftype otype, ntype;
2285         struct net_device *dev = info->user_ptr[1];
2286         u32 _flags, *flags = NULL;
2287         bool change = false;
2288
2289         memset(&params, 0, sizeof(params));
2290
2291         otype = ntype = dev->ieee80211_ptr->iftype;
2292
2293         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2294                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2295                 if (otype != ntype)
2296                         change = true;
2297                 if (ntype > NL80211_IFTYPE_MAX)
2298                         return -EINVAL;
2299         }
2300
2301         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2302                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2303
2304                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2305                         return -EINVAL;
2306                 if (netif_running(dev))
2307                         return -EBUSY;
2308
2309                 wdev_lock(wdev);
2310                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2311                              IEEE80211_MAX_MESH_ID_LEN);
2312                 wdev->mesh_id_up_len =
2313                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2314                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2315                        wdev->mesh_id_up_len);
2316                 wdev_unlock(wdev);
2317         }
2318
2319         if (info->attrs[NL80211_ATTR_4ADDR]) {
2320                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2321                 change = true;
2322                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2323                 if (err)
2324                         return err;
2325         } else {
2326                 params.use_4addr = -1;
2327         }
2328
2329         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2330                 if (ntype != NL80211_IFTYPE_MONITOR)
2331                         return -EINVAL;
2332                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2333                                           &_flags);
2334                 if (err)
2335                         return err;
2336
2337                 flags = &_flags;
2338                 change = true;
2339         }
2340
2341         if (change)
2342                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2343         else
2344                 err = 0;
2345
2346         if (!err && params.use_4addr != -1)
2347                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2348
2349         return err;
2350 }
2351
2352 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2353 {
2354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2355         struct vif_params params;
2356         struct wireless_dev *wdev;
2357         struct sk_buff *msg;
2358         int err;
2359         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2360         u32 flags;
2361
2362         memset(&params, 0, sizeof(params));
2363
2364         if (!info->attrs[NL80211_ATTR_IFNAME])
2365                 return -EINVAL;
2366
2367         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2368                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2369                 if (type > NL80211_IFTYPE_MAX)
2370                         return -EINVAL;
2371         }
2372
2373         if (!rdev->ops->add_virtual_intf ||
2374             !(rdev->wiphy.interface_modes & (1 << type)))
2375                 return -EOPNOTSUPP;
2376
2377         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2378                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2379                            ETH_ALEN);
2380                 if (!is_valid_ether_addr(params.macaddr))
2381                         return -EADDRNOTAVAIL;
2382         }
2383
2384         if (info->attrs[NL80211_ATTR_4ADDR]) {
2385                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2386                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2387                 if (err)
2388                         return err;
2389         }
2390
2391         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2392         if (!msg)
2393                 return -ENOMEM;
2394
2395         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2396                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2397                                   &flags);
2398         wdev = rdev_add_virtual_intf(rdev,
2399                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2400                                 type, err ? NULL : &flags, &params);
2401         if (IS_ERR(wdev)) {
2402                 nlmsg_free(msg);
2403                 return PTR_ERR(wdev);
2404         }
2405
2406         switch (type) {
2407         case NL80211_IFTYPE_MESH_POINT:
2408                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2409                         break;
2410                 wdev_lock(wdev);
2411                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2412                              IEEE80211_MAX_MESH_ID_LEN);
2413                 wdev->mesh_id_up_len =
2414                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2415                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2416                        wdev->mesh_id_up_len);
2417                 wdev_unlock(wdev);
2418                 break;
2419         case NL80211_IFTYPE_P2P_DEVICE:
2420                 /*
2421                  * P2P Device doesn't have a netdev, so doesn't go
2422                  * through the netdev notifier and must be added here
2423                  */
2424                 mutex_init(&wdev->mtx);
2425                 INIT_LIST_HEAD(&wdev->event_list);
2426                 spin_lock_init(&wdev->event_lock);
2427                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2428                 spin_lock_init(&wdev->mgmt_registrations_lock);
2429
2430                 wdev->identifier = ++rdev->wdev_id;
2431                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2432                 rdev->devlist_generation++;
2433                 break;
2434         default:
2435                 break;
2436         }
2437
2438         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2439                                rdev, wdev) < 0) {
2440                 nlmsg_free(msg);
2441                 return -ENOBUFS;
2442         }
2443
2444         return genlmsg_reply(msg, info);
2445 }
2446
2447 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2448 {
2449         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2450         struct wireless_dev *wdev = info->user_ptr[1];
2451
2452         if (!rdev->ops->del_virtual_intf)
2453                 return -EOPNOTSUPP;
2454
2455         /*
2456          * If we remove a wireless device without a netdev then clear
2457          * user_ptr[1] so that nl80211_post_doit won't dereference it
2458          * to check if it needs to do dev_put(). Otherwise it crashes
2459          * since the wdev has been freed, unlike with a netdev where
2460          * we need the dev_put() for the netdev to really be freed.
2461          */
2462         if (!wdev->netdev)
2463                 info->user_ptr[1] = NULL;
2464
2465         return rdev_del_virtual_intf(rdev, wdev);
2466 }
2467
2468 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2469 {
2470         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2471         struct net_device *dev = info->user_ptr[1];
2472         u16 noack_map;
2473
2474         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2475                 return -EINVAL;
2476
2477         if (!rdev->ops->set_noack_map)
2478                 return -EOPNOTSUPP;
2479
2480         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2481
2482         return rdev_set_noack_map(rdev, dev, noack_map);
2483 }
2484
2485 struct get_key_cookie {
2486         struct sk_buff *msg;
2487         int error;
2488         int idx;
2489 };
2490
2491 static void get_key_callback(void *c, struct key_params *params)
2492 {
2493         struct nlattr *key;
2494         struct get_key_cookie *cookie = c;
2495
2496         if ((params->key &&
2497              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2498                      params->key_len, params->key)) ||
2499             (params->seq &&
2500              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2501                      params->seq_len, params->seq)) ||
2502             (params->cipher &&
2503              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2504                          params->cipher)))
2505                 goto nla_put_failure;
2506
2507         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2508         if (!key)
2509                 goto nla_put_failure;
2510
2511         if ((params->key &&
2512              nla_put(cookie->msg, NL80211_KEY_DATA,
2513                      params->key_len, params->key)) ||
2514             (params->seq &&
2515              nla_put(cookie->msg, NL80211_KEY_SEQ,
2516                      params->seq_len, params->seq)) ||
2517             (params->cipher &&
2518              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2519                          params->cipher)))
2520                 goto nla_put_failure;
2521
2522         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2523                 goto nla_put_failure;
2524
2525         nla_nest_end(cookie->msg, key);
2526
2527         return;
2528  nla_put_failure:
2529         cookie->error = 1;
2530 }
2531
2532 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2533 {
2534         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2535         int err;
2536         struct net_device *dev = info->user_ptr[1];
2537         u8 key_idx = 0;
2538         const u8 *mac_addr = NULL;
2539         bool pairwise;
2540         struct get_key_cookie cookie = {
2541                 .error = 0,
2542         };
2543         void *hdr;
2544         struct sk_buff *msg;
2545
2546         if (info->attrs[NL80211_ATTR_KEY_IDX])
2547                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2548
2549         if (key_idx > 5)
2550                 return -EINVAL;
2551
2552         if (info->attrs[NL80211_ATTR_MAC])
2553                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2554
2555         pairwise = !!mac_addr;
2556         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2557                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2558                 if (kt >= NUM_NL80211_KEYTYPES)
2559                         return -EINVAL;
2560                 if (kt != NL80211_KEYTYPE_GROUP &&
2561                     kt != NL80211_KEYTYPE_PAIRWISE)
2562                         return -EINVAL;
2563                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2564         }
2565
2566         if (!rdev->ops->get_key)
2567                 return -EOPNOTSUPP;
2568
2569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2570         if (!msg)
2571                 return -ENOMEM;
2572
2573         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2574                              NL80211_CMD_NEW_KEY);
2575         if (IS_ERR(hdr))
2576                 return PTR_ERR(hdr);
2577
2578         cookie.msg = msg;
2579         cookie.idx = key_idx;
2580
2581         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2582             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2583                 goto nla_put_failure;
2584         if (mac_addr &&
2585             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2586                 goto nla_put_failure;
2587
2588         if (pairwise && mac_addr &&
2589             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2590                 return -ENOENT;
2591
2592         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2593                            get_key_callback);
2594
2595         if (err)
2596                 goto free_msg;
2597
2598         if (cookie.error)
2599                 goto nla_put_failure;
2600
2601         genlmsg_end(msg, hdr);
2602         return genlmsg_reply(msg, info);
2603
2604  nla_put_failure:
2605         err = -ENOBUFS;
2606  free_msg:
2607         nlmsg_free(msg);
2608         return err;
2609 }
2610
2611 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2612 {
2613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2614         struct key_parse key;
2615         int err;
2616         struct net_device *dev = info->user_ptr[1];
2617
2618         err = nl80211_parse_key(info, &key);
2619         if (err)
2620                 return err;
2621
2622         if (key.idx < 0)
2623                 return -EINVAL;
2624
2625         /* only support setting default key */
2626         if (!key.def && !key.defmgmt)
2627                 return -EINVAL;
2628
2629         wdev_lock(dev->ieee80211_ptr);
2630
2631         if (key.def) {
2632                 if (!rdev->ops->set_default_key) {
2633                         err = -EOPNOTSUPP;
2634                         goto out;
2635                 }
2636
2637                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2638                 if (err)
2639                         goto out;
2640
2641                 err = rdev_set_default_key(rdev, dev, key.idx,
2642                                                  key.def_uni, key.def_multi);
2643
2644                 if (err)
2645                         goto out;
2646
2647 #ifdef CONFIG_CFG80211_WEXT
2648                 dev->ieee80211_ptr->wext.default_key = key.idx;
2649 #endif
2650         } else {
2651                 if (key.def_uni || !key.def_multi) {
2652                         err = -EINVAL;
2653                         goto out;
2654                 }
2655
2656                 if (!rdev->ops->set_default_mgmt_key) {
2657                         err = -EOPNOTSUPP;
2658                         goto out;
2659                 }
2660
2661                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2662                 if (err)
2663                         goto out;
2664
2665                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2666                 if (err)
2667                         goto out;
2668
2669 #ifdef CONFIG_CFG80211_WEXT
2670                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2671 #endif
2672         }
2673
2674  out:
2675         wdev_unlock(dev->ieee80211_ptr);
2676
2677         return err;
2678 }
2679
2680 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2681 {
2682         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2683         int err;
2684         struct net_device *dev = info->user_ptr[1];
2685         struct key_parse key;
2686         const u8 *mac_addr = NULL;
2687
2688         err = nl80211_parse_key(info, &key);
2689         if (err)
2690                 return err;
2691
2692         if (!key.p.key)
2693                 return -EINVAL;
2694
2695         if (info->attrs[NL80211_ATTR_MAC])
2696                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2697
2698         if (key.type == -1) {
2699                 if (mac_addr)
2700                         key.type = NL80211_KEYTYPE_PAIRWISE;
2701                 else
2702                         key.type = NL80211_KEYTYPE_GROUP;
2703         }
2704
2705         /* for now */
2706         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2707             key.type != NL80211_KEYTYPE_GROUP)
2708                 return -EINVAL;
2709
2710         if (!rdev->ops->add_key)
2711                 return -EOPNOTSUPP;
2712
2713         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2714                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2715                                            mac_addr))
2716                 return -EINVAL;
2717
2718         wdev_lock(dev->ieee80211_ptr);
2719         err = nl80211_key_allowed(dev->ieee80211_ptr);
2720         if (!err)
2721                 err = rdev_add_key(rdev, dev, key.idx,
2722                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2723                                     mac_addr, &key.p);
2724         wdev_unlock(dev->ieee80211_ptr);
2725
2726         return err;
2727 }
2728
2729 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2730 {
2731         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2732         int err;
2733         struct net_device *dev = info->user_ptr[1];
2734         u8 *mac_addr = NULL;
2735         struct key_parse key;
2736
2737         err = nl80211_parse_key(info, &key);
2738         if (err)
2739                 return err;
2740
2741         if (info->attrs[NL80211_ATTR_MAC])
2742                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2743
2744         if (key.type == -1) {
2745                 if (mac_addr)
2746                         key.type = NL80211_KEYTYPE_PAIRWISE;
2747                 else
2748                         key.type = NL80211_KEYTYPE_GROUP;
2749         }
2750
2751         /* for now */
2752         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2753             key.type != NL80211_KEYTYPE_GROUP)
2754                 return -EINVAL;
2755
2756         if (!rdev->ops->del_key)
2757                 return -EOPNOTSUPP;
2758
2759         wdev_lock(dev->ieee80211_ptr);
2760         err = nl80211_key_allowed(dev->ieee80211_ptr);
2761
2762         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2763             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2764                 err = -ENOENT;
2765
2766         if (!err)
2767                 err = rdev_del_key(rdev, dev, key.idx,
2768                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2769                                    mac_addr);
2770
2771 #ifdef CONFIG_CFG80211_WEXT
2772         if (!err) {
2773                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2774                         dev->ieee80211_ptr->wext.default_key = -1;
2775                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2776                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2777         }
2778 #endif
2779         wdev_unlock(dev->ieee80211_ptr);
2780
2781         return err;
2782 }
2783
2784 /* This function returns an error or the number of nested attributes */
2785 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2786 {
2787         struct nlattr *attr;
2788         int n_entries = 0, tmp;
2789
2790         nla_for_each_nested(attr, nl_attr, tmp) {
2791                 if (nla_len(attr) != ETH_ALEN)
2792                         return -EINVAL;
2793
2794                 n_entries++;
2795         }
2796
2797         return n_entries;
2798 }
2799
2800 /*
2801  * This function parses ACL information and allocates memory for ACL data.
2802  * On successful return, the calling function is responsible to free the
2803  * ACL buffer returned by this function.
2804  */
2805 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2806                                                 struct genl_info *info)
2807 {
2808         enum nl80211_acl_policy acl_policy;
2809         struct nlattr *attr;
2810         struct cfg80211_acl_data *acl;
2811         int i = 0, n_entries, tmp;
2812
2813         if (!wiphy->max_acl_mac_addrs)
2814                 return ERR_PTR(-EOPNOTSUPP);
2815
2816         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2817                 return ERR_PTR(-EINVAL);
2818
2819         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2820         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2821             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2822                 return ERR_PTR(-EINVAL);
2823
2824         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2825                 return ERR_PTR(-EINVAL);
2826
2827         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2828         if (n_entries < 0)
2829                 return ERR_PTR(n_entries);
2830
2831         if (n_entries > wiphy->max_acl_mac_addrs)
2832                 return ERR_PTR(-ENOTSUPP);
2833
2834         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2835                       GFP_KERNEL);
2836         if (!acl)
2837                 return ERR_PTR(-ENOMEM);
2838
2839         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2840                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2841                 i++;
2842         }
2843
2844         acl->n_acl_entries = n_entries;
2845         acl->acl_policy = acl_policy;
2846
2847         return acl;
2848 }
2849
2850 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2851 {
2852         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2853         struct net_device *dev = info->user_ptr[1];
2854         struct cfg80211_acl_data *acl;
2855         int err;
2856
2857         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2858             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2859                 return -EOPNOTSUPP;
2860
2861         if (!dev->ieee80211_ptr->beacon_interval)
2862                 return -EINVAL;
2863
2864         acl = parse_acl_data(&rdev->wiphy, info);
2865         if (IS_ERR(acl))
2866                 return PTR_ERR(acl);
2867
2868         err = rdev_set_mac_acl(rdev, dev, acl);
2869
2870         kfree(acl);
2871
2872         return err;
2873 }
2874
2875 static int nl80211_parse_beacon(struct genl_info *info,
2876                                 struct cfg80211_beacon_data *bcn)
2877 {
2878         bool haveinfo = false;
2879
2880         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2881             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2882             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2883             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2884                 return -EINVAL;
2885
2886         memset(bcn, 0, sizeof(*bcn));
2887
2888         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2889                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2890                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2891                 if (!bcn->head_len)
2892                         return -EINVAL;
2893                 haveinfo = true;
2894         }
2895
2896         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2897                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2898                 bcn->tail_len =
2899                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2900                 haveinfo = true;
2901         }
2902
2903         if (!haveinfo)
2904                 return -EINVAL;
2905
2906         if (info->attrs[NL80211_ATTR_IE]) {
2907                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2908                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2909         }
2910
2911         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2912                 bcn->proberesp_ies =
2913                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2914                 bcn->proberesp_ies_len =
2915                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2916         }
2917
2918         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2919                 bcn->assocresp_ies =
2920                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2921                 bcn->assocresp_ies_len =
2922                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2923         }
2924
2925         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2926                 bcn->probe_resp =
2927                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2928                 bcn->probe_resp_len =
2929                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2930         }
2931
2932         return 0;
2933 }
2934
2935 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2936                                    struct cfg80211_ap_settings *params)
2937 {
2938         struct wireless_dev *wdev;
2939         bool ret = false;
2940
2941         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2942                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2943                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2944                         continue;
2945
2946                 if (!wdev->preset_chandef.chan)
2947                         continue;
2948
2949                 params->chandef = wdev->preset_chandef;
2950                 ret = true;
2951                 break;
2952         }
2953
2954         return ret;
2955 }
2956
2957 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2958                                     enum nl80211_auth_type auth_type,
2959                                     enum nl80211_commands cmd)
2960 {
2961         if (auth_type > NL80211_AUTHTYPE_MAX)
2962                 return false;
2963
2964         switch (cmd) {
2965         case NL80211_CMD_AUTHENTICATE:
2966                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2967                     auth_type == NL80211_AUTHTYPE_SAE)
2968                         return false;
2969                 return true;
2970         case NL80211_CMD_CONNECT:
2971         case NL80211_CMD_START_AP:
2972                 /* SAE not supported yet */
2973                 if (auth_type == NL80211_AUTHTYPE_SAE)
2974                         return false;
2975                 return true;
2976         default:
2977                 return false;
2978         }
2979 }
2980
2981 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2982 {
2983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2984         struct net_device *dev = info->user_ptr[1];
2985         struct wireless_dev *wdev = dev->ieee80211_ptr;
2986         struct cfg80211_ap_settings params;
2987         int err;
2988         u8 radar_detect_width = 0;
2989
2990         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2991             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2992                 return -EOPNOTSUPP;
2993
2994         if (!rdev->ops->start_ap)
2995                 return -EOPNOTSUPP;
2996
2997         if (wdev->beacon_interval)
2998                 return -EALREADY;
2999
3000         memset(&params, 0, sizeof(params));
3001
3002         /* these are required for START_AP */
3003         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3004             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3005             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3006                 return -EINVAL;
3007
3008         err = nl80211_parse_beacon(info, &params.beacon);
3009         if (err)
3010                 return err;
3011
3012         params.beacon_interval =
3013                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3014         params.dtim_period =
3015                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3016
3017         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3018         if (err)
3019                 return err;
3020
3021         /*
3022          * In theory, some of these attributes should be required here
3023          * but since they were not used when the command was originally
3024          * added, keep them optional for old user space programs to let
3025          * them continue to work with drivers that do not need the
3026          * additional information -- drivers must check!
3027          */
3028         if (info->attrs[NL80211_ATTR_SSID]) {
3029                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3030                 params.ssid_len =
3031                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3032                 if (params.ssid_len == 0 ||
3033                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3034                         return -EINVAL;
3035         }
3036
3037         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3038                 params.hidden_ssid = nla_get_u32(
3039                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3040                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3041                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3042                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3043                         return -EINVAL;
3044         }
3045
3046         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3047
3048         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3049                 params.auth_type = nla_get_u32(
3050                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3051                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3052                                              NL80211_CMD_START_AP))
3053                         return -EINVAL;
3054         } else
3055                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3056
3057         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3058                                       NL80211_MAX_NR_CIPHER_SUITES);
3059         if (err)
3060                 return err;
3061
3062         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3063                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3064                         return -EOPNOTSUPP;
3065                 params.inactivity_timeout = nla_get_u16(
3066                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3067         }
3068
3069         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3070                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3071                         return -EINVAL;
3072                 params.p2p_ctwindow =
3073                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3074                 if (params.p2p_ctwindow > 127)
3075                         return -EINVAL;
3076                 if (params.p2p_ctwindow != 0 &&
3077                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3078                         return -EINVAL;
3079         }
3080
3081         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3082                 u8 tmp;
3083
3084                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3085                         return -EINVAL;
3086                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3087                 if (tmp > 1)
3088                         return -EINVAL;
3089                 params.p2p_opp_ps = tmp;
3090                 if (params.p2p_opp_ps != 0 &&
3091                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3092                         return -EINVAL;
3093         }
3094
3095         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3096                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3097                 if (err)
3098                         return err;
3099         } else if (wdev->preset_chandef.chan) {
3100                 params.chandef = wdev->preset_chandef;
3101         } else if (!nl80211_get_ap_channel(rdev, &params))
3102                 return -EINVAL;
3103
3104         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3105                 return -EINVAL;
3106
3107         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3108         if (err < 0)
3109                 return err;
3110         if (err) {
3111                 radar_detect_width = BIT(params.chandef.width);
3112                 params.radar_required = true;
3113         }
3114
3115         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3116                                            params.chandef.chan,
3117                                            CHAN_MODE_SHARED,
3118                                            radar_detect_width);
3119         if (err)
3120                 return err;
3121
3122         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3123                 params.acl = parse_acl_data(&rdev->wiphy, info);
3124                 if (IS_ERR(params.acl))
3125                         return PTR_ERR(params.acl);
3126         }
3127
3128         err = rdev_start_ap(rdev, dev, &params);
3129         if (!err) {
3130                 wdev->preset_chandef = params.chandef;
3131                 wdev->beacon_interval = params.beacon_interval;
3132                 wdev->channel = params.chandef.chan;
3133                 wdev->ssid_len = params.ssid_len;
3134                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3135         }
3136
3137         kfree(params.acl);
3138
3139         return err;
3140 }
3141
3142 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3143 {
3144         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3145         struct net_device *dev = info->user_ptr[1];
3146         struct wireless_dev *wdev = dev->ieee80211_ptr;
3147         struct cfg80211_beacon_data params;
3148         int err;
3149
3150         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3151             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3152                 return -EOPNOTSUPP;
3153
3154         if (!rdev->ops->change_beacon)
3155                 return -EOPNOTSUPP;
3156
3157         if (!wdev->beacon_interval)
3158                 return -EINVAL;
3159
3160         err = nl80211_parse_beacon(info, &params);
3161         if (err)
3162                 return err;
3163
3164         return rdev_change_beacon(rdev, dev, &params);
3165 }
3166
3167 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3168 {
3169         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3170         struct net_device *dev = info->user_ptr[1];
3171
3172         return cfg80211_stop_ap(rdev, dev);
3173 }
3174
3175 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3176         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3177         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3178         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3179         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3180         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3181         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3182 };
3183
3184 static int parse_station_flags(struct genl_info *info,
3185                                enum nl80211_iftype iftype,
3186                                struct station_parameters *params)
3187 {
3188         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3189         struct nlattr *nla;
3190         int flag;
3191
3192         /*
3193          * Try parsing the new attribute first so userspace
3194          * can specify both for older kernels.
3195          */
3196         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3197         if (nla) {
3198                 struct nl80211_sta_flag_update *sta_flags;
3199
3200                 sta_flags = nla_data(nla);
3201                 params->sta_flags_mask = sta_flags->mask;
3202                 params->sta_flags_set = sta_flags->set;
3203                 params->sta_flags_set &= params->sta_flags_mask;
3204                 if ((params->sta_flags_mask |
3205                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3206                         return -EINVAL;
3207                 return 0;
3208         }
3209
3210         /* if present, parse the old attribute */
3211
3212         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3213         if (!nla)
3214                 return 0;
3215
3216         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3217                              nla, sta_flags_policy))
3218                 return -EINVAL;
3219
3220         /*
3221          * Only allow certain flags for interface types so that
3222          * other attributes are silently ignored. Remember that
3223          * this is backward compatibility code with old userspace
3224          * and shouldn't be hit in other cases anyway.
3225          */
3226         switch (iftype) {
3227         case NL80211_IFTYPE_AP:
3228         case NL80211_IFTYPE_AP_VLAN:
3229         case NL80211_IFTYPE_P2P_GO:
3230                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3231                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3232                                          BIT(NL80211_STA_FLAG_WME) |
3233                                          BIT(NL80211_STA_FLAG_MFP);
3234                 break;
3235         case NL80211_IFTYPE_P2P_CLIENT:
3236         case NL80211_IFTYPE_STATION:
3237                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3238                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3239                 break;
3240         case NL80211_IFTYPE_MESH_POINT:
3241                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3242                                          BIT(NL80211_STA_FLAG_MFP) |
3243                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3244         default:
3245                 return -EINVAL;
3246         }
3247
3248         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3249                 if (flags[flag]) {
3250                         params->sta_flags_set |= (1<<flag);
3251
3252                         /* no longer support new API additions in old API */
3253                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3254                                 return -EINVAL;
3255                 }
3256         }
3257
3258         return 0;
3259 }
3260
3261 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3262                                  int attr)
3263 {
3264         struct nlattr *rate;
3265         u32 bitrate;
3266         u16 bitrate_compat;
3267
3268         rate = nla_nest_start(msg, attr);
3269         if (!rate)
3270                 return false;
3271
3272         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3273         bitrate = cfg80211_calculate_bitrate(info);
3274         /* report 16-bit bitrate only if we can */
3275         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3276         if (bitrate > 0 &&
3277             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3278                 return false;
3279         if (bitrate_compat > 0 &&
3280             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3281                 return false;
3282
3283         if (info->flags & RATE_INFO_FLAGS_MCS) {
3284                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3285                         return false;
3286                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3287                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3288                         return false;
3289                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3290                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3291                         return false;
3292         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3293                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3294                         return false;
3295                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3296                         return false;
3297                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3298                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3299                         return false;
3300                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3301                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3302                         return false;
3303                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3304                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3305                         return false;
3306                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3307                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3308                         return false;
3309                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3310                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3311                         return false;
3312         }
3313
3314         nla_nest_end(msg, rate);
3315         return true;
3316 }
3317
3318 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3319                                int id)
3320 {
3321         void *attr;
3322         int i = 0;
3323
3324         if (!mask)
3325                 return true;
3326
3327         attr = nla_nest_start(msg, id);
3328         if (!attr)
3329                 return false;
3330
3331         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3332                 if (!(mask & BIT(i)))
3333                         continue;
3334
3335                 if (nla_put_u8(msg, i, signal[i]))
3336                         return false;
3337         }
3338
3339         nla_nest_end(msg, attr);
3340
3341         return true;
3342 }
3343
3344 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3345                                 int flags,
3346                                 struct cfg80211_registered_device *rdev,
3347                                 struct net_device *dev,
3348                                 const u8 *mac_addr, struct station_info *sinfo)
3349 {
3350         void *hdr;
3351         struct nlattr *sinfoattr, *bss_param;
3352
3353         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3354         if (!hdr)
3355                 return -1;
3356
3357         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3358             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3359             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3360                 goto nla_put_failure;
3361
3362         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3363         if (!sinfoattr)
3364                 goto nla_put_failure;
3365         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3366             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3367                         sinfo->connected_time))
3368                 goto nla_put_failure;
3369         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3370             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3371                         sinfo->inactive_time))
3372                 goto nla_put_failure;
3373         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3374                               STATION_INFO_RX_BYTES64)) &&
3375             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3376                         (u32)sinfo->rx_bytes))
3377                 goto nla_put_failure;
3378         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3379                               STATION_INFO_TX_BYTES64)) &&
3380             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3381                         (u32)sinfo->tx_bytes))
3382                 goto nla_put_failure;
3383         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3384             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3385                         sinfo->rx_bytes))
3386                 goto nla_put_failure;
3387         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3388             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3389                         sinfo->tx_bytes))
3390                 goto nla_put_failure;
3391         if ((sinfo->filled & STATION_INFO_LLID) &&
3392             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3393                 goto nla_put_failure;
3394         if ((sinfo->filled & STATION_INFO_PLID) &&
3395             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3396                 goto nla_put_failure;
3397         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3398             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3399                        sinfo->plink_state))
3400                 goto nla_put_failure;
3401         switch (rdev->wiphy.signal_type) {
3402         case CFG80211_SIGNAL_TYPE_MBM:
3403                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3404                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3405                                sinfo->signal))
3406                         goto nla_put_failure;
3407                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3408                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3409                                sinfo->signal_avg))
3410                         goto nla_put_failure;
3411                 break;
3412         default:
3413                 break;
3414         }
3415         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3416                 if (!nl80211_put_signal(msg, sinfo->chains,
3417                                         sinfo->chain_signal,
3418                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3419                         goto nla_put_failure;
3420         }
3421         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3422                 if (!nl80211_put_signal(msg, sinfo->chains,
3423                                         sinfo->chain_signal_avg,
3424                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3425                         goto nla_put_failure;
3426         }
3427         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3428                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3429                                           NL80211_STA_INFO_TX_BITRATE))
3430                         goto nla_put_failure;
3431         }
3432         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3433                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3434                                           NL80211_STA_INFO_RX_BITRATE))
3435                         goto nla_put_failure;
3436         }
3437         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3438             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3439                         sinfo->rx_packets))
3440                 goto nla_put_failure;
3441         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3442             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3443                         sinfo->tx_packets))
3444                 goto nla_put_failure;
3445         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3446             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3447                         sinfo->tx_retries))
3448                 goto nla_put_failure;
3449         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3450             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3451                         sinfo->tx_failed))
3452                 goto nla_put_failure;
3453         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3454             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3455                         sinfo->beacon_loss_count))
3456                 goto nla_put_failure;
3457         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3458             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3459                         sinfo->local_pm))
3460                 goto nla_put_failure;
3461         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3462             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3463                         sinfo->peer_pm))
3464                 goto nla_put_failure;
3465         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3466             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3467                         sinfo->nonpeer_pm))
3468                 goto nla_put_failure;
3469         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3470                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3471                 if (!bss_param)
3472                         goto nla_put_failure;
3473
3474                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3475                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3476                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3477                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3478                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3479                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3480                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3481                                sinfo->bss_param.dtim_period) ||
3482                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3483                                 sinfo->bss_param.beacon_interval))
3484                         goto nla_put_failure;
3485
3486                 nla_nest_end(msg, bss_param);
3487         }
3488         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3489             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3490                     sizeof(struct nl80211_sta_flag_update),
3491                     &sinfo->sta_flags))
3492                 goto nla_put_failure;
3493         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3494                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3495                             sinfo->t_offset))
3496                 goto nla_put_failure;
3497         nla_nest_end(msg, sinfoattr);
3498
3499         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3500             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3501                     sinfo->assoc_req_ies))
3502                 goto nla_put_failure;
3503
3504         return genlmsg_end(msg, hdr);
3505
3506  nla_put_failure:
3507         genlmsg_cancel(msg, hdr);
3508         return -EMSGSIZE;
3509 }
3510
3511 static int nl80211_dump_station(struct sk_buff *skb,
3512                                 struct netlink_callback *cb)
3513 {
3514         struct station_info sinfo;
3515         struct cfg80211_registered_device *dev;
3516         struct wireless_dev *wdev;
3517         u8 mac_addr[ETH_ALEN];
3518         int sta_idx = cb->args[2];
3519         int err;
3520
3521         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3522         if (err)
3523                 return err;
3524
3525         if (!wdev->netdev) {
3526                 err = -EINVAL;
3527                 goto out_err;
3528         }
3529
3530         if (!dev->ops->dump_station) {
3531                 err = -EOPNOTSUPP;
3532                 goto out_err;
3533         }
3534
3535         while (1) {
3536                 memset(&sinfo, 0, sizeof(sinfo));
3537                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3538                                         mac_addr, &sinfo);
3539                 if (err == -ENOENT)
3540                         break;
3541                 if (err)
3542                         goto out_err;
3543
3544                 if (nl80211_send_station(skb,
3545                                 NETLINK_CB(cb->skb).portid,
3546                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3547                                 dev, wdev->netdev, mac_addr,
3548                                 &sinfo) < 0)
3549                         goto out;
3550
3551                 sta_idx++;
3552         }
3553
3554
3555  out:
3556         cb->args[2] = sta_idx;
3557         err = skb->len;
3558  out_err:
3559         nl80211_finish_wdev_dump(dev);
3560
3561         return err;
3562 }
3563
3564 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3565 {
3566         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3567         struct net_device *dev = info->user_ptr[1];
3568         struct station_info sinfo;
3569         struct sk_buff *msg;
3570         u8 *mac_addr = NULL;
3571         int err;
3572
3573         memset(&sinfo, 0, sizeof(sinfo));
3574
3575         if (!info->attrs[NL80211_ATTR_MAC])
3576                 return -EINVAL;
3577
3578         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3579
3580         if (!rdev->ops->get_station)
3581                 return -EOPNOTSUPP;
3582
3583         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3584         if (err)
3585                 return err;
3586
3587         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3588         if (!msg)
3589                 return -ENOMEM;
3590
3591         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3592                                  rdev, dev, mac_addr, &sinfo) < 0) {
3593                 nlmsg_free(msg);
3594                 return -ENOBUFS;
3595         }
3596
3597         return genlmsg_reply(msg, info);
3598 }
3599
3600 int cfg80211_check_station_change(struct wiphy *wiphy,
3601                                   struct station_parameters *params,
3602                                   enum cfg80211_station_type statype)
3603 {
3604         if (params->listen_interval != -1)
3605                 return -EINVAL;
3606         if (params->aid)
3607                 return -EINVAL;
3608
3609         /* When you run into this, adjust the code below for the new flag */
3610         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3611
3612         switch (statype) {
3613         case CFG80211_STA_MESH_PEER_KERNEL:
3614         case CFG80211_STA_MESH_PEER_USER:
3615                 /*
3616                  * No ignoring the TDLS flag here -- the userspace mesh
3617                  * code doesn't have the bug of including TDLS in the
3618                  * mask everywhere.
3619                  */
3620                 if (params->sta_flags_mask &
3621                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3622                                   BIT(NL80211_STA_FLAG_MFP) |
3623                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3624                         return -EINVAL;
3625                 break;
3626         case CFG80211_STA_TDLS_PEER_SETUP:
3627         case CFG80211_STA_TDLS_PEER_ACTIVE:
3628                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3629                         return -EINVAL;
3630                 /* ignore since it can't change */
3631                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3632                 break;
3633         default:
3634                 /* disallow mesh-specific things */
3635                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3636                         return -EINVAL;
3637                 if (params->local_pm)
3638                         return -EINVAL;
3639                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3640                         return -EINVAL;
3641         }
3642
3643         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3644             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3645                 /* TDLS can't be set, ... */
3646                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3647                         return -EINVAL;
3648                 /*
3649                  * ... but don't bother the driver with it. This works around
3650                  * a hostapd/wpa_supplicant issue -- it always includes the
3651                  * TLDS_PEER flag in the mask even for AP mode.
3652                  */
3653                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3654         }
3655
3656         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3657                 /* reject other things that can't change */
3658                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3659                         return -EINVAL;
3660                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3661                         return -EINVAL;
3662                 if (params->supported_rates)
3663                         return -EINVAL;
3664                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3665                         return -EINVAL;
3666         }
3667
3668         if (statype != CFG80211_STA_AP_CLIENT) {
3669                 if (params->vlan)
3670                         return -EINVAL;
3671         }
3672
3673         switch (statype) {
3674         case CFG80211_STA_AP_MLME_CLIENT:
3675                 /* Use this only for authorizing/unauthorizing a station */
3676                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3677                         return -EOPNOTSUPP;
3678                 break;
3679         case CFG80211_STA_AP_CLIENT:
3680                 /* accept only the listed bits */
3681                 if (params->sta_flags_mask &
3682                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3683                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3684                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3685                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3686                                   BIT(NL80211_STA_FLAG_WME) |
3687                                   BIT(NL80211_STA_FLAG_MFP)))
3688                         return -EINVAL;
3689
3690                 /* but authenticated/associated only if driver handles it */
3691                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3692                     params->sta_flags_mask &
3693                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3694                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3695                         return -EINVAL;
3696                 break;
3697         case CFG80211_STA_IBSS:
3698         case CFG80211_STA_AP_STA:
3699                 /* reject any changes other than AUTHORIZED */
3700                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3701                         return -EINVAL;
3702                 break;
3703         case CFG80211_STA_TDLS_PEER_SETUP:
3704                 /* reject any changes other than AUTHORIZED or WME */
3705                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3706                                                BIT(NL80211_STA_FLAG_WME)))
3707                         return -EINVAL;
3708                 /* force (at least) rates when authorizing */
3709                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3710                     !params->supported_rates)
3711                         return -EINVAL;
3712                 break;
3713         case CFG80211_STA_TDLS_PEER_ACTIVE:
3714                 /* reject any changes */
3715                 return -EINVAL;
3716         case CFG80211_STA_MESH_PEER_KERNEL:
3717                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3718                         return -EINVAL;
3719                 break;
3720         case CFG80211_STA_MESH_PEER_USER:
3721                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3722                         return -EINVAL;
3723                 break;
3724         }
3725
3726         return 0;
3727 }
3728 EXPORT_SYMBOL(cfg80211_check_station_change);
3729
3730 /*
3731  * Get vlan interface making sure it is running and on the right wiphy.
3732  */
3733 static struct net_device *get_vlan(struct genl_info *info,
3734                                    struct cfg80211_registered_device *rdev)
3735 {
3736         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3737         struct net_device *v;
3738         int ret;
3739
3740         if (!vlanattr)
3741                 return NULL;
3742
3743         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3744         if (!v)
3745                 return ERR_PTR(-ENODEV);
3746
3747         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3748                 ret = -EINVAL;
3749                 goto error;
3750         }
3751
3752         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3753             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3754             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3755                 ret = -EINVAL;
3756                 goto error;
3757         }
3758
3759         if (!netif_running(v)) {
3760                 ret = -ENETDOWN;
3761                 goto error;
3762         }
3763
3764         return v;
3765  error:
3766         dev_put(v);
3767         return ERR_PTR(ret);
3768 }
3769
3770 static struct nla_policy
3771 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3772         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3773         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3774 };
3775
3776 static int nl80211_parse_sta_wme(struct genl_info *info,
3777                                  struct station_parameters *params)
3778 {
3779         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3780         struct nlattr *nla;
3781         int err;
3782
3783         /* parse WME attributes if present */
3784         if (!info->attrs[NL80211_ATTR_STA_WME])
3785                 return 0;
3786
3787         nla = info->attrs[NL80211_ATTR_STA_WME];
3788         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3789                                nl80211_sta_wme_policy);
3790         if (err)
3791                 return err;
3792
3793         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3794                 params->uapsd_queues = nla_get_u8(
3795                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3796         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3797                 return -EINVAL;
3798
3799         if (tb[NL80211_STA_WME_MAX_SP])
3800                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3801
3802         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3803                 return -EINVAL;
3804
3805         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3806
3807         return 0;
3808 }
3809
3810 static int nl80211_set_station_tdls(struct genl_info *info,
3811                                     struct station_parameters *params)
3812 {
3813         /* Dummy STA entry gets updated once the peer capabilities are known */
3814         if (info->attrs[NL80211_ATTR_PEER_AID])
3815                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3816         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3817                 params->ht_capa =
3818                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3819         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3820                 params->vht_capa =
3821                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3822
3823         return nl80211_parse_sta_wme(info, params);
3824 }
3825
3826 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3827 {
3828         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3829         struct net_device *dev = info->user_ptr[1];
3830         struct station_parameters params;
3831         u8 *mac_addr;
3832         int err;
3833
3834         memset(&params, 0, sizeof(params));
3835
3836         params.listen_interval = -1;
3837
3838         if (!rdev->ops->change_station)
3839                 return -EOPNOTSUPP;
3840
3841         if (info->attrs[NL80211_ATTR_STA_AID])
3842                 return -EINVAL;
3843
3844         if (!info->attrs[NL80211_ATTR_MAC])
3845                 return -EINVAL;
3846
3847         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3848
3849         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3850                 params.supported_rates =
3851                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3852                 params.supported_rates_len =
3853                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3854         }
3855
3856         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3857                 params.capability =
3858                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3859                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3860         }
3861
3862         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3863                 params.ext_capab =
3864                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3865                 params.ext_capab_len =
3866                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3867         }
3868
3869         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3870                 return -EINVAL;
3871
3872         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3873                 return -EINVAL;
3874
3875         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3876                 params.plink_action =
3877                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3878                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3879                         return -EINVAL;
3880         }
3881
3882         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3883                 params.plink_state =
3884                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3885                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3886                         return -EINVAL;
3887                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3888         }
3889
3890         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3891                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3892                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3893
3894                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3895                     pm > NL80211_MESH_POWER_MAX)
3896                         return -EINVAL;
3897
3898                 params.local_pm = pm;
3899         }
3900
3901         /* Include parameters for TDLS peer (will check later) */
3902         err = nl80211_set_station_tdls(info, &params);
3903         if (err)
3904                 return err;
3905
3906         params.vlan = get_vlan(info, rdev);
3907         if (IS_ERR(params.vlan))
3908                 return PTR_ERR(params.vlan);
3909
3910         switch (dev->ieee80211_ptr->iftype) {
3911         case NL80211_IFTYPE_AP:
3912         case NL80211_IFTYPE_AP_VLAN:
3913         case NL80211_IFTYPE_P2P_GO:
3914         case NL80211_IFTYPE_P2P_CLIENT:
3915         case NL80211_IFTYPE_STATION:
3916         case NL80211_IFTYPE_ADHOC:
3917         case NL80211_IFTYPE_MESH_POINT:
3918                 break;
3919         default:
3920                 err = -EOPNOTSUPP;
3921                 goto out_put_vlan;
3922         }
3923
3924         /* driver will call cfg80211_check_station_change() */
3925         err = rdev_change_station(rdev, dev, mac_addr, &params);
3926
3927  out_put_vlan:
3928         if (params.vlan)
3929                 dev_put(params.vlan);
3930
3931         return err;
3932 }
3933
3934 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3935 {
3936         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3937         int err;
3938         struct net_device *dev = info->user_ptr[1];
3939         struct station_parameters params;
3940         u8 *mac_addr = NULL;
3941
3942         memset(&params, 0, sizeof(params));
3943
3944         if (!rdev->ops->add_station)
3945                 return -EOPNOTSUPP;
3946
3947         if (!info->attrs[NL80211_ATTR_MAC])
3948                 return -EINVAL;
3949
3950         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3951                 return -EINVAL;
3952
3953         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3954                 return -EINVAL;
3955
3956         if (!info->attrs[NL80211_ATTR_STA_AID] &&
3957             !info->attrs[NL80211_ATTR_PEER_AID])
3958                 return -EINVAL;
3959
3960         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3961         params.supported_rates =
3962                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3963         params.supported_rates_len =
3964                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3965         params.listen_interval =
3966                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3967
3968         if (info->attrs[NL80211_ATTR_STA_AID])
3969                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3970         else
3971                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3972         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3973                 return -EINVAL;
3974
3975         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3976                 params.capability =
3977                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3978                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3979         }
3980
3981         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3982                 params.ext_capab =
3983                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3984                 params.ext_capab_len =
3985                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3986         }
3987
3988         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3989                 params.ht_capa =
3990                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3991
3992         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3993                 params.vht_capa =
3994                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3995
3996         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3997                 params.plink_action =
3998                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3999                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4000                         return -EINVAL;
4001         }
4002
4003         err = nl80211_parse_sta_wme(info, &params);
4004         if (err)
4005                 return err;
4006
4007         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4008                 return -EINVAL;
4009
4010         /* When you run into this, adjust the code below for the new flag */
4011         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4012
4013         switch (dev->ieee80211_ptr->iftype) {
4014         case NL80211_IFTYPE_AP:
4015         case NL80211_IFTYPE_AP_VLAN:
4016         case NL80211_IFTYPE_P2P_GO:
4017                 /* ignore WME attributes if iface/sta is not capable */
4018                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4019                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4020                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4021
4022                 /* TDLS peers cannot be added */
4023                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4024                         return -EINVAL;
4025                 /* but don't bother the driver with it */
4026                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4027
4028                 /* allow authenticated/associated only if driver handles it */
4029                 if (!(rdev->wiphy.features &
4030                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4031                     params.sta_flags_mask &
4032                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4033                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4034                         return -EINVAL;
4035
4036                 /* must be last in here for error handling */
4037                 params.vlan = get_vlan(info, rdev);
4038                 if (IS_ERR(params.vlan))
4039                         return PTR_ERR(params.vlan);
4040                 break;
4041         case NL80211_IFTYPE_MESH_POINT:
4042                 /* ignore uAPSD data */
4043                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4044
4045                 /* associated is disallowed */
4046                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4047                         return -EINVAL;
4048                 /* TDLS peers cannot be added */
4049                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4050                         return -EINVAL;
4051                 break;
4052         case NL80211_IFTYPE_STATION:
4053         case NL80211_IFTYPE_P2P_CLIENT:
4054                 /* ignore uAPSD data */
4055                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4056
4057                 /* these are disallowed */
4058                 if (params.sta_flags_mask &
4059                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4060                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4061                         return -EINVAL;
4062                 /* Only TDLS peers can be added */
4063                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4064                         return -EINVAL;
4065                 /* Can only add if TDLS ... */
4066                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4067                         return -EOPNOTSUPP;
4068                 /* ... with external setup is supported */
4069                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4070                         return -EOPNOTSUPP;
4071                 /*
4072                  * Older wpa_supplicant versions always mark the TDLS peer
4073                  * as authorized, but it shouldn't yet be.
4074                  */
4075                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4076                 break;
4077         default:
4078                 return -EOPNOTSUPP;
4079         }
4080
4081         /* be aware of params.vlan when changing code here */
4082
4083         err = rdev_add_station(rdev, dev, mac_addr, &params);
4084
4085         if (params.vlan)
4086                 dev_put(params.vlan);
4087         return err;
4088 }
4089
4090 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4091 {
4092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4093         struct net_device *dev = info->user_ptr[1];
4094         u8 *mac_addr = NULL;
4095
4096         if (info->attrs[NL80211_ATTR_MAC])
4097                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4098
4099         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4100             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4101             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4102             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4103                 return -EINVAL;
4104
4105         if (!rdev->ops->del_station)
4106                 return -EOPNOTSUPP;
4107
4108         return rdev_del_station(rdev, dev, mac_addr);
4109 }
4110
4111 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4112                                 int flags, struct net_device *dev,
4113                                 u8 *dst, u8 *next_hop,
4114                                 struct mpath_info *pinfo)
4115 {
4116         void *hdr;
4117         struct nlattr *pinfoattr;
4118
4119         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4120         if (!hdr)
4121                 return -1;
4122
4123         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4124             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4125             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4126             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4127                 goto nla_put_failure;
4128
4129         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4130         if (!pinfoattr)
4131                 goto nla_put_failure;
4132         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4133             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4134                         pinfo->frame_qlen))
4135                 goto nla_put_failure;
4136         if (((pinfo->filled & MPATH_INFO_SN) &&
4137              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4138             ((pinfo->filled & MPATH_INFO_METRIC) &&
4139              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4140                          pinfo->metric)) ||
4141             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4142              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4143                          pinfo->exptime)) ||
4144             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4145              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4146                         pinfo->flags)) ||
4147             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4148              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4149                          pinfo->discovery_timeout)) ||
4150             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4151              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4152                         pinfo->discovery_retries)))
4153                 goto nla_put_failure;
4154
4155         nla_nest_end(msg, pinfoattr);
4156
4157         return genlmsg_end(msg, hdr);
4158
4159  nla_put_failure:
4160         genlmsg_cancel(msg, hdr);
4161         return -EMSGSIZE;
4162 }
4163
4164 static int nl80211_dump_mpath(struct sk_buff *skb,
4165                               struct netlink_callback *cb)
4166 {
4167         struct mpath_info pinfo;
4168         struct cfg80211_registered_device *dev;
4169         struct wireless_dev *wdev;
4170         u8 dst[ETH_ALEN];
4171         u8 next_hop[ETH_ALEN];
4172         int path_idx = cb->args[2];
4173         int err;
4174
4175         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4176         if (err)
4177                 return err;
4178
4179         if (!dev->ops->dump_mpath) {
4180                 err = -EOPNOTSUPP;
4181                 goto out_err;
4182         }
4183
4184         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4185                 err = -EOPNOTSUPP;
4186                 goto out_err;
4187         }
4188
4189         while (1) {
4190                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4191                                       next_hop, &pinfo);
4192                 if (err == -ENOENT)
4193                         break;
4194                 if (err)
4195                         goto out_err;
4196
4197                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4198                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4199                                        wdev->netdev, dst, next_hop,
4200                                        &pinfo) < 0)
4201                         goto out;
4202
4203                 path_idx++;
4204         }
4205
4206
4207  out:
4208         cb->args[2] = path_idx;
4209         err = skb->len;
4210  out_err:
4211         nl80211_finish_wdev_dump(dev);
4212         return err;
4213 }
4214
4215 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4216 {
4217         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4218         int err;
4219         struct net_device *dev = info->user_ptr[1];
4220         struct mpath_info pinfo;
4221         struct sk_buff *msg;
4222         u8 *dst = NULL;
4223         u8 next_hop[ETH_ALEN];
4224
4225         memset(&pinfo, 0, sizeof(pinfo));
4226
4227         if (!info->attrs[NL80211_ATTR_MAC])
4228                 return -EINVAL;
4229
4230         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4231
4232         if (!rdev->ops->get_mpath)
4233                 return -EOPNOTSUPP;
4234
4235         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4236                 return -EOPNOTSUPP;
4237
4238         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4239         if (err)
4240                 return err;
4241
4242         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4243         if (!msg)
4244                 return -ENOMEM;
4245
4246         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4247                                  dev, dst, next_hop, &pinfo) < 0) {
4248                 nlmsg_free(msg);
4249                 return -ENOBUFS;
4250         }
4251
4252         return genlmsg_reply(msg, info);
4253 }
4254
4255 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4256 {
4257         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4258         struct net_device *dev = info->user_ptr[1];
4259         u8 *dst = NULL;
4260         u8 *next_hop = NULL;
4261
4262         if (!info->attrs[NL80211_ATTR_MAC])
4263                 return -EINVAL;
4264
4265         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4266                 return -EINVAL;
4267
4268         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4269         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4270
4271         if (!rdev->ops->change_mpath)
4272                 return -EOPNOTSUPP;
4273
4274         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4275                 return -EOPNOTSUPP;
4276
4277         return rdev_change_mpath(rdev, dev, dst, next_hop);
4278 }
4279
4280 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4281 {
4282         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4283         struct net_device *dev = info->user_ptr[1];
4284         u8 *dst = NULL;
4285         u8 *next_hop = NULL;
4286
4287         if (!info->attrs[NL80211_ATTR_MAC])
4288                 return -EINVAL;
4289
4290         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4291                 return -EINVAL;
4292
4293         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4294         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4295
4296         if (!rdev->ops->add_mpath)
4297                 return -EOPNOTSUPP;
4298
4299         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4300                 return -EOPNOTSUPP;
4301
4302         return rdev_add_mpath(rdev, dev, dst, next_hop);
4303 }
4304
4305 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4306 {
4307         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4308         struct net_device *dev = info->user_ptr[1];
4309         u8 *dst = NULL;
4310
4311         if (info->attrs[NL80211_ATTR_MAC])
4312                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4313
4314         if (!rdev->ops->del_mpath)
4315                 return -EOPNOTSUPP;
4316
4317         return rdev_del_mpath(rdev, dev, dst);
4318 }
4319
4320 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4321 {
4322         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4323         struct net_device *dev = info->user_ptr[1];
4324         struct bss_parameters params;
4325
4326         memset(&params, 0, sizeof(params));
4327         /* default to not changing parameters */
4328         params.use_cts_prot = -1;
4329         params.use_short_preamble = -1;
4330         params.use_short_slot_time = -1;
4331         params.ap_isolate = -1;
4332         params.ht_opmode = -1;
4333         params.p2p_ctwindow = -1;
4334         params.p2p_opp_ps = -1;
4335
4336         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4337                 params.use_cts_prot =
4338                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4339         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4340                 params.use_short_preamble =
4341                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4342         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4343                 params.use_short_slot_time =
4344                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4345         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4346                 params.basic_rates =
4347                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4348                 params.basic_rates_len =
4349                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4350         }
4351         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4352                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4353         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4354                 params.ht_opmode =
4355                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4356
4357         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4358                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4359                         return -EINVAL;
4360                 params.p2p_ctwindow =
4361                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4362                 if (params.p2p_ctwindow < 0)
4363                         return -EINVAL;
4364                 if (params.p2p_ctwindow != 0 &&
4365                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4366                         return -EINVAL;
4367         }
4368
4369         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4370                 u8 tmp;
4371
4372                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4373                         return -EINVAL;
4374                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4375                 if (tmp > 1)
4376                         return -EINVAL;
4377                 params.p2p_opp_ps = tmp;
4378                 if (params.p2p_opp_ps &&
4379                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4380                         return -EINVAL;
4381         }
4382
4383         if (!rdev->ops->change_bss)
4384                 return -EOPNOTSUPP;
4385
4386         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4387             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4388                 return -EOPNOTSUPP;
4389
4390         return rdev_change_bss(rdev, dev, &params);
4391 }
4392
4393 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4394         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4395         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4396         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4397         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4398         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4399         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4400 };
4401
4402 static int parse_reg_rule(struct nlattr *tb[],
4403         struct ieee80211_reg_rule *reg_rule)
4404 {
4405         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4406         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4407
4408         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4409                 return -EINVAL;
4410         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4411                 return -EINVAL;
4412         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4413                 return -EINVAL;
4414         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4415                 return -EINVAL;
4416         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4417                 return -EINVAL;
4418
4419         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4420
4421         freq_range->start_freq_khz =
4422                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4423         freq_range->end_freq_khz =
4424                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4425         freq_range->max_bandwidth_khz =
4426                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4427
4428         power_rule->max_eirp =
4429                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4430
4431         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4432                 power_rule->max_antenna_gain =
4433                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4434
4435         return 0;
4436 }
4437
4438 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4439 {
4440         int r;
4441         char *data = NULL;
4442         enum nl80211_user_reg_hint_type user_reg_hint_type;
4443
4444         /*
4445          * You should only get this when cfg80211 hasn't yet initialized
4446          * completely when built-in to the kernel right between the time
4447          * window between nl80211_init() and regulatory_init(), if that is
4448          * even possible.
4449          */
4450         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4451                 return -EINPROGRESS;
4452
4453         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4454                 return -EINVAL;
4455
4456         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4457
4458         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4459                 user_reg_hint_type =
4460                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4461         else
4462                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4463
4464         switch (user_reg_hint_type) {
4465         case NL80211_USER_REG_HINT_USER:
4466         case NL80211_USER_REG_HINT_CELL_BASE:
4467                 break;
4468         default:
4469                 return -EINVAL;
4470         }
4471
4472         r = regulatory_hint_user(data, user_reg_hint_type);
4473
4474         return r;
4475 }
4476
4477 static int nl80211_get_mesh_config(struct sk_buff *skb,
4478                                    struct genl_info *info)
4479 {
4480         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4481         struct net_device *dev = info->user_ptr[1];
4482         struct wireless_dev *wdev = dev->ieee80211_ptr;
4483         struct mesh_config cur_params;
4484         int err = 0;
4485         void *hdr;
4486         struct nlattr *pinfoattr;
4487         struct sk_buff *msg;
4488
4489         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4490                 return -EOPNOTSUPP;
4491
4492         if (!rdev->ops->get_mesh_config)
4493                 return -EOPNOTSUPP;
4494
4495         wdev_lock(wdev);
4496         /* If not connected, get default parameters */
4497         if (!wdev->mesh_id_len)
4498                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4499         else
4500                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4501         wdev_unlock(wdev);
4502
4503         if (err)
4504                 return err;
4505
4506         /* Draw up a netlink message to send back */
4507         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4508         if (!msg)
4509                 return -ENOMEM;
4510         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4511                              NL80211_CMD_GET_MESH_CONFIG);
4512         if (!hdr)
4513                 goto out;
4514         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4515         if (!pinfoattr)
4516                 goto nla_put_failure;
4517         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4518             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4519                         cur_params.dot11MeshRetryTimeout) ||
4520             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4521                         cur_params.dot11MeshConfirmTimeout) ||
4522             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4523                         cur_params.dot11MeshHoldingTimeout) ||
4524             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4525                         cur_params.dot11MeshMaxPeerLinks) ||
4526             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4527                        cur_params.dot11MeshMaxRetries) ||
4528             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4529                        cur_params.dot11MeshTTL) ||
4530             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4531                        cur_params.element_ttl) ||
4532             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4533                        cur_params.auto_open_plinks) ||
4534             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4535                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4536             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4537                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4538             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4539                         cur_params.path_refresh_time) ||
4540             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4541                         cur_params.min_discovery_timeout) ||
4542             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4543                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4544             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4545                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4546             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4547                         cur_params.dot11MeshHWMPperrMinInterval) ||
4548             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4549                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4550             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4551                        cur_params.dot11MeshHWMPRootMode) ||
4552             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4553                         cur_params.dot11MeshHWMPRannInterval) ||
4554             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4555                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4556             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4557                        cur_params.dot11MeshForwarding) ||
4558             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4559                         cur_params.rssi_threshold) ||
4560             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4561                         cur_params.ht_opmode) ||
4562             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4563                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4564             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4565                         cur_params.dot11MeshHWMProotInterval) ||
4566             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4567                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4568             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4569                         cur_params.power_mode) ||
4570             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4571                         cur_params.dot11MeshAwakeWindowDuration))
4572                 goto nla_put_failure;
4573         nla_nest_end(msg, pinfoattr);
4574         genlmsg_end(msg, hdr);
4575         return genlmsg_reply(msg, info);
4576
4577  nla_put_failure:
4578         genlmsg_cancel(msg, hdr);
4579  out:
4580         nlmsg_free(msg);
4581         return -ENOBUFS;
4582 }
4583
4584 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4585         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4586         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4587         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4588         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4589         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4590         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4591         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4592         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4593         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4594         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4595         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4596         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4597         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4598         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4599         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4600         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4601         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4602         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4603         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4604         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4605         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4606         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4607         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4608         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4609         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4610         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4611         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4612 };
4613
4614 static const struct nla_policy
4615         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4616         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4617         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4618         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4619         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4620         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4621         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4622         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4623                                     .len = IEEE80211_MAX_DATA_LEN },
4624         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4625 };
4626
4627 static int nl80211_parse_mesh_config(struct genl_info *info,
4628                                      struct mesh_config *cfg,
4629                                      u32 *mask_out)
4630 {
4631         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4632         u32 mask = 0;
4633
4634 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4635 do {                                                                        \
4636         if (tb[attr]) {                                                     \
4637                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4638                         return -EINVAL;                                     \
4639                 cfg->param = fn(tb[attr]);                                  \
4640                 mask |= (1 << (attr - 1));                                  \
4641         }                                                                   \
4642 } while (0)
4643
4644
4645         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4646                 return -EINVAL;
4647         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4648                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4649                              nl80211_meshconf_params_policy))
4650                 return -EINVAL;
4651
4652         /* This makes sure that there aren't more than 32 mesh config
4653          * parameters (otherwise our bitfield scheme would not work.) */
4654         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4655
4656         /* Fill in the params struct */
4657         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4658                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4659                                   nla_get_u16);
4660         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4661                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4662                                   nla_get_u16);
4663         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4664                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4665                                   nla_get_u16);
4666         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4667                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4668                                   nla_get_u16);
4669         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4670                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4671                                   nla_get_u8);
4672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4673                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4674         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4675                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4676                                   nla_get_u8);
4677         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4678                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4679                                   nla_get_u8);
4680         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4681                                   1, 255, mask,
4682                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4683                                   nla_get_u32);
4684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4685                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4686                                   nla_get_u8);
4687         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4688                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4689                                   nla_get_u32);
4690         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4691                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4692                                   nla_get_u16);
4693         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4694                                   1, 65535, mask,
4695                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4696                                   nla_get_u32);
4697         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4698                                   1, 65535, mask,
4699                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4700                                   nla_get_u16);
4701         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4702                                   1, 65535, mask,
4703                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4704                                   nla_get_u16);
4705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4706                                   dot11MeshHWMPnetDiameterTraversalTime,
4707                                   1, 65535, mask,
4708                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4709                                   nla_get_u16);
4710         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4711                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4712                                   nla_get_u8);
4713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4714                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4715                                   nla_get_u16);
4716         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4717                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4718                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4719                                   nla_get_u8);
4720         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4721                                   mask, NL80211_MESHCONF_FORWARDING,
4722                                   nla_get_u8);
4723         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4724                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4725                                   nla_get_u32);
4726         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4727                                   mask, NL80211_MESHCONF_HT_OPMODE,
4728                                   nla_get_u16);
4729         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4730                                   1, 65535, mask,
4731                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4732                                   nla_get_u32);
4733         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4734                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4735                                   nla_get_u16);
4736         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4737                                   dot11MeshHWMPconfirmationInterval,
4738                                   1, 65535, mask,
4739                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4740                                   nla_get_u16);
4741         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4742                                   NL80211_MESH_POWER_ACTIVE,
4743                                   NL80211_MESH_POWER_MAX,
4744                                   mask, NL80211_MESHCONF_POWER_MODE,
4745                                   nla_get_u32);
4746         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4747                                   0, 65535, mask,
4748                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4749         if (mask_out)
4750                 *mask_out = mask;
4751
4752         return 0;
4753
4754 #undef FILL_IN_MESH_PARAM_IF_SET
4755 }
4756
4757 static int nl80211_parse_mesh_setup(struct genl_info *info,
4758                                      struct mesh_setup *setup)
4759 {
4760         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4761         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4762
4763         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4764                 return -EINVAL;
4765         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4766                              info->attrs[NL80211_ATTR_MESH_SETUP],
4767                              nl80211_mesh_setup_params_policy))
4768                 return -EINVAL;
4769
4770         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4771                 setup->sync_method =
4772                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4773                  IEEE80211_SYNC_METHOD_VENDOR :
4774                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4775
4776         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4777                 setup->path_sel_proto =
4778                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4779                  IEEE80211_PATH_PROTOCOL_VENDOR :
4780                  IEEE80211_PATH_PROTOCOL_HWMP;
4781
4782         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4783                 setup->path_metric =
4784                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4785                  IEEE80211_PATH_METRIC_VENDOR :
4786                  IEEE80211_PATH_METRIC_AIRTIME;
4787
4788
4789         if (tb[NL80211_MESH_SETUP_IE]) {
4790                 struct nlattr *ieattr =
4791                         tb[NL80211_MESH_SETUP_IE];
4792                 if (!is_valid_ie_attr(ieattr))
4793                         return -EINVAL;
4794                 setup->ie = nla_data(ieattr);
4795                 setup->ie_len = nla_len(ieattr);
4796         }
4797         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4798             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4799                 return -EINVAL;
4800         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4801         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4802         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4803         if (setup->is_secure)
4804                 setup->user_mpm = true;
4805
4806         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4807                 if (!setup->user_mpm)
4808                         return -EINVAL;
4809                 setup->auth_id =
4810                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4811         }
4812
4813         return 0;
4814 }
4815
4816 static int nl80211_update_mesh_config(struct sk_buff *skb,
4817                                       struct genl_info *info)
4818 {
4819         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4820         struct net_device *dev = info->user_ptr[1];
4821         struct wireless_dev *wdev = dev->ieee80211_ptr;
4822         struct mesh_config cfg;
4823         u32 mask;
4824         int err;
4825
4826         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4827                 return -EOPNOTSUPP;
4828
4829         if (!rdev->ops->update_mesh_config)
4830                 return -EOPNOTSUPP;
4831
4832         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4833         if (err)
4834                 return err;
4835
4836         wdev_lock(wdev);
4837         if (!wdev->mesh_id_len)
4838                 err = -ENOLINK;
4839
4840         if (!err)
4841                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4842
4843         wdev_unlock(wdev);
4844
4845         return err;
4846 }
4847
4848 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4849 {
4850         const struct ieee80211_regdomain *regdom;
4851         struct sk_buff *msg;
4852         void *hdr = NULL;
4853         struct nlattr *nl_reg_rules;
4854         unsigned int i;
4855
4856         if (!cfg80211_regdomain)
4857                 return -EINVAL;
4858
4859         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4860         if (!msg)
4861                 return -ENOBUFS;
4862
4863         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4864                              NL80211_CMD_GET_REG);
4865         if (!hdr)
4866                 goto put_failure;
4867
4868         if (reg_last_request_cell_base() &&
4869             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4870                         NL80211_USER_REG_HINT_CELL_BASE))
4871                 goto nla_put_failure;
4872
4873         rcu_read_lock();
4874         regdom = rcu_dereference(cfg80211_regdomain);
4875
4876         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4877             (regdom->dfs_region &&
4878              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4879                 goto nla_put_failure_rcu;
4880
4881         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4882         if (!nl_reg_rules)
4883                 goto nla_put_failure_rcu;
4884
4885         for (i = 0; i < regdom->n_reg_rules; i++) {
4886                 struct nlattr *nl_reg_rule;
4887                 const struct ieee80211_reg_rule *reg_rule;
4888                 const struct ieee80211_freq_range *freq_range;
4889                 const struct ieee80211_power_rule *power_rule;
4890
4891                 reg_rule = &regdom->reg_rules[i];
4892                 freq_range = &reg_rule->freq_range;
4893                 power_rule = &reg_rule->power_rule;
4894
4895                 nl_reg_rule = nla_nest_start(msg, i);
4896                 if (!nl_reg_rule)
4897                         goto nla_put_failure_rcu;
4898
4899                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4900                                 reg_rule->flags) ||
4901                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4902                                 freq_range->start_freq_khz) ||
4903                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4904                                 freq_range->end_freq_khz) ||
4905                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4906                                 freq_range->max_bandwidth_khz) ||
4907                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4908                                 power_rule->max_antenna_gain) ||
4909                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4910                                 power_rule->max_eirp))
4911                         goto nla_put_failure_rcu;
4912
4913                 nla_nest_end(msg, nl_reg_rule);
4914         }
4915         rcu_read_unlock();
4916
4917         nla_nest_end(msg, nl_reg_rules);
4918
4919         genlmsg_end(msg, hdr);
4920         return genlmsg_reply(msg, info);
4921
4922 nla_put_failure_rcu:
4923         rcu_read_unlock();
4924 nla_put_failure:
4925         genlmsg_cancel(msg, hdr);
4926 put_failure:
4927         nlmsg_free(msg);
4928         return -EMSGSIZE;
4929 }
4930
4931 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4932 {
4933         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4934         struct nlattr *nl_reg_rule;
4935         char *alpha2 = NULL;
4936         int rem_reg_rules = 0, r = 0;
4937         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4938         u8 dfs_region = 0;
4939         struct ieee80211_regdomain *rd = NULL;
4940
4941         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4942                 return -EINVAL;
4943
4944         if (!info->attrs[NL80211_ATTR_REG_RULES])
4945                 return -EINVAL;
4946
4947         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4948
4949         if (info->attrs[NL80211_ATTR_DFS_REGION])
4950                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4951
4952         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4953                             rem_reg_rules) {
4954                 num_rules++;
4955                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4956                         return -EINVAL;
4957         }
4958
4959         size_of_regd = sizeof(struct ieee80211_regdomain) +
4960                        num_rules * sizeof(struct ieee80211_reg_rule);
4961
4962         rd = kzalloc(size_of_regd, GFP_KERNEL);
4963         if (!rd)
4964                 return -ENOMEM;
4965
4966         rd->n_reg_rules = num_rules;
4967         rd->alpha2[0] = alpha2[0];
4968         rd->alpha2[1] = alpha2[1];
4969
4970         /*
4971          * Disable DFS master mode if the DFS region was
4972          * not supported or known on this kernel.
4973          */
4974         if (reg_supported_dfs_region(dfs_region))
4975                 rd->dfs_region = dfs_region;
4976
4977         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4978                             rem_reg_rules) {
4979                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4980                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4981                           reg_rule_policy);
4982                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4983                 if (r)
4984                         goto bad_reg;
4985
4986                 rule_idx++;
4987
4988                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4989                         r = -EINVAL;
4990                         goto bad_reg;
4991                 }
4992         }
4993
4994         r = set_regdom(rd);
4995         /* set_regdom took ownership */
4996         rd = NULL;
4997
4998  bad_reg:
4999         kfree(rd);
5000         return r;
5001 }
5002
5003 static int validate_scan_freqs(struct nlattr *freqs)
5004 {
5005         struct nlattr *attr1, *attr2;
5006         int n_channels = 0, tmp1, tmp2;
5007
5008         nla_for_each_nested(attr1, freqs, tmp1) {
5009                 n_channels++;
5010                 /*
5011                  * Some hardware has a limited channel list for
5012                  * scanning, and it is pretty much nonsensical
5013                  * to scan for a channel twice, so disallow that
5014                  * and don't require drivers to check that the
5015                  * channel list they get isn't longer than what
5016                  * they can scan, as long as they can scan all
5017                  * the channels they registered at once.
5018                  */
5019                 nla_for_each_nested(attr2, freqs, tmp2)
5020                         if (attr1 != attr2 &&
5021                             nla_get_u32(attr1) == nla_get_u32(attr2))
5022                                 return 0;
5023         }
5024
5025         return n_channels;
5026 }
5027
5028 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5029 {
5030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5031         struct wireless_dev *wdev = info->user_ptr[1];
5032         struct cfg80211_scan_request *request;
5033         struct nlattr *attr;
5034         struct wiphy *wiphy;
5035         int err, tmp, n_ssids = 0, n_channels, i;
5036         size_t ie_len;
5037
5038         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5039                 return -EINVAL;
5040
5041         wiphy = &rdev->wiphy;
5042
5043         if (!rdev->ops->scan)
5044                 return -EOPNOTSUPP;
5045
5046         if (rdev->scan_req) {
5047                 err = -EBUSY;
5048                 goto unlock;
5049         }
5050
5051         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5052                 n_channels = validate_scan_freqs(
5053                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5054                 if (!n_channels) {
5055                         err = -EINVAL;
5056                         goto unlock;
5057                 }
5058         } else {
5059                 enum ieee80211_band band;
5060                 n_channels = 0;
5061
5062                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5063                         if (wiphy->bands[band])
5064                                 n_channels += wiphy->bands[band]->n_channels;
5065         }
5066
5067         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5068                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5069                         n_ssids++;
5070
5071         if (n_ssids > wiphy->max_scan_ssids) {
5072                 err = -EINVAL;
5073                 goto unlock;
5074         }
5075
5076         if (info->attrs[NL80211_ATTR_IE])
5077                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5078         else
5079                 ie_len = 0;
5080
5081         if (ie_len > wiphy->max_scan_ie_len) {
5082                 err = -EINVAL;
5083                 goto unlock;
5084         }
5085
5086         request = kzalloc(sizeof(*request)
5087                         + sizeof(*request->ssids) * n_ssids
5088                         + sizeof(*request->channels) * n_channels
5089                         + ie_len, GFP_KERNEL);
5090         if (!request) {
5091                 err = -ENOMEM;
5092                 goto unlock;
5093         }
5094
5095         if (n_ssids)
5096                 request->ssids = (void *)&request->channels[n_channels];
5097         request->n_ssids = n_ssids;
5098         if (ie_len) {
5099                 if (request->ssids)
5100                         request->ie = (void *)(request->ssids + n_ssids);
5101                 else
5102                         request->ie = (void *)(request->channels + n_channels);
5103         }
5104
5105         i = 0;
5106         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5107                 /* user specified, bail out if channel not found */
5108                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5109                         struct ieee80211_channel *chan;
5110
5111                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5112
5113                         if (!chan) {
5114                                 err = -EINVAL;
5115                                 goto out_free;
5116                         }
5117
5118                         /* ignore disabled channels */
5119                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5120                                 continue;
5121
5122                         request->channels[i] = chan;
5123                         i++;
5124                 }
5125         } else {
5126                 enum ieee80211_band band;
5127
5128                 /* all channels */
5129                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5130                         int j;
5131                         if (!wiphy->bands[band])
5132                                 continue;
5133                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5134                                 struct ieee80211_channel *chan;
5135
5136                                 chan = &wiphy->bands[band]->channels[j];
5137
5138                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5139                                         continue;
5140
5141                                 request->channels[i] = chan;
5142                                 i++;
5143                         }
5144                 }
5145         }
5146
5147         if (!i) {
5148                 err = -EINVAL;
5149                 goto out_free;
5150         }
5151
5152         request->n_channels = i;
5153
5154         i = 0;
5155         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5156                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5157                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5158                                 err = -EINVAL;
5159                                 goto out_free;
5160                         }
5161                         request->ssids[i].ssid_len = nla_len(attr);
5162                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5163                         i++;
5164                 }
5165         }
5166
5167         if (info->attrs[NL80211_ATTR_IE]) {
5168                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5169                 memcpy((void *)request->ie,
5170                        nla_data(info->attrs[NL80211_ATTR_IE]),
5171                        request->ie_len);
5172         }
5173
5174         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5175                 if (wiphy->bands[i])
5176                         request->rates[i] =
5177                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5178
5179         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5180                 nla_for_each_nested(attr,
5181                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5182                                     tmp) {
5183                         enum ieee80211_band band = nla_type(attr);
5184
5185                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5186                                 err = -EINVAL;
5187                                 goto out_free;
5188                         }
5189                         err = ieee80211_get_ratemask(wiphy->bands[band],
5190                                                      nla_data(attr),
5191                                                      nla_len(attr),
5192                                                      &request->rates[band]);
5193                         if (err)
5194                                 goto out_free;
5195                 }
5196         }
5197
5198         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5199                 request->flags = nla_get_u32(
5200                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5201                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5202                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5203                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5204                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5205                         err = -EOPNOTSUPP;
5206                         goto out_free;
5207                 }
5208         }
5209
5210         request->no_cck =
5211                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5212
5213         request->wdev = wdev;
5214         request->wiphy = &rdev->wiphy;
5215         request->scan_start = jiffies;
5216
5217         rdev->scan_req = request;
5218         err = rdev_scan(rdev, request);
5219
5220         if (!err) {
5221                 nl80211_send_scan_start(rdev, wdev);
5222                 if (wdev->netdev)
5223                         dev_hold(wdev->netdev);
5224         } else {
5225  out_free:
5226                 rdev->scan_req = NULL;
5227                 kfree(request);
5228         }
5229
5230  unlock:
5231         return err;
5232 }
5233
5234 static int nl80211_start_sched_scan(struct sk_buff *skb,
5235                                     struct genl_info *info)
5236 {
5237         struct cfg80211_sched_scan_request *request;
5238         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5239         struct net_device *dev = info->user_ptr[1];
5240         struct nlattr *attr;
5241         struct wiphy *wiphy;
5242         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5243         u32 interval;
5244         enum ieee80211_band band;
5245         size_t ie_len;
5246         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5247
5248         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5249             !rdev->ops->sched_scan_start)
5250                 return -EOPNOTSUPP;
5251
5252         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5253                 return -EINVAL;
5254
5255         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5256                 return -EINVAL;
5257
5258         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5259         if (interval == 0)
5260                 return -EINVAL;
5261
5262         wiphy = &rdev->wiphy;
5263
5264         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5265                 n_channels = validate_scan_freqs(
5266                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5267                 if (!n_channels)
5268                         return -EINVAL;
5269         } else {
5270                 n_channels = 0;
5271
5272                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5273                         if (wiphy->bands[band])
5274                                 n_channels += wiphy->bands[band]->n_channels;
5275         }
5276
5277         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5278                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5279                                     tmp)
5280                         n_ssids++;
5281
5282         if (n_ssids > wiphy->max_sched_scan_ssids)
5283                 return -EINVAL;
5284
5285         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5286                 nla_for_each_nested(attr,
5287                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5288                                     tmp)
5289                         n_match_sets++;
5290
5291         if (n_match_sets > wiphy->max_match_sets)
5292                 return -EINVAL;
5293
5294         if (info->attrs[NL80211_ATTR_IE])
5295                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5296         else
5297                 ie_len = 0;
5298
5299         if (ie_len > wiphy->max_sched_scan_ie_len)
5300                 return -EINVAL;
5301
5302         if (rdev->sched_scan_req) {
5303                 err = -EINPROGRESS;
5304                 goto out;
5305         }
5306
5307         request = kzalloc(sizeof(*request)
5308                         + sizeof(*request->ssids) * n_ssids
5309                         + sizeof(*request->match_sets) * n_match_sets
5310                         + sizeof(*request->channels) * n_channels
5311                         + ie_len, GFP_KERNEL);
5312         if (!request) {
5313                 err = -ENOMEM;
5314                 goto out;
5315         }
5316
5317         if (n_ssids)
5318                 request->ssids = (void *)&request->channels[n_channels];
5319         request->n_ssids = n_ssids;
5320         if (ie_len) {
5321                 if (request->ssids)
5322                         request->ie = (void *)(request->ssids + n_ssids);
5323                 else
5324                         request->ie = (void *)(request->channels + n_channels);
5325         }
5326
5327         if (n_match_sets) {
5328                 if (request->ie)
5329                         request->match_sets = (void *)(request->ie + ie_len);
5330                 else if (request->ssids)
5331                         request->match_sets =
5332                                 (void *)(request->ssids + n_ssids);
5333                 else
5334                         request->match_sets =
5335                                 (void *)(request->channels + n_channels);
5336         }
5337         request->n_match_sets = n_match_sets;
5338
5339         i = 0;
5340         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5341                 /* user specified, bail out if channel not found */
5342                 nla_for_each_nested(attr,
5343                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5344                                     tmp) {
5345                         struct ieee80211_channel *chan;
5346
5347                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5348
5349                         if (!chan) {
5350                                 err = -EINVAL;
5351                                 goto out_free;
5352                         }
5353
5354                         /* ignore disabled channels */
5355                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5356                                 continue;
5357
5358                         request->channels[i] = chan;
5359                         i++;
5360                 }
5361         } else {
5362                 /* all channels */
5363                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5364                         int j;
5365                         if (!wiphy->bands[band])
5366                                 continue;
5367                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5368                                 struct ieee80211_channel *chan;
5369
5370                                 chan = &wiphy->bands[band]->channels[j];
5371
5372                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5373                                         continue;
5374
5375                                 request->channels[i] = chan;
5376                                 i++;
5377                         }
5378                 }
5379         }
5380
5381         if (!i) {
5382                 err = -EINVAL;
5383                 goto out_free;
5384         }
5385
5386         request->n_channels = i;
5387
5388         i = 0;
5389         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5390                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5391                                     tmp) {
5392                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5393                                 err = -EINVAL;
5394                                 goto out_free;
5395                         }
5396                         request->ssids[i].ssid_len = nla_len(attr);
5397                         memcpy(request->ssids[i].ssid, nla_data(attr),
5398                                nla_len(attr));
5399                         i++;
5400                 }
5401         }
5402
5403         i = 0;
5404         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5405                 nla_for_each_nested(attr,
5406                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5407                                     tmp) {
5408                         struct nlattr *ssid, *rssi;
5409
5410                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5411                                   nla_data(attr), nla_len(attr),
5412                                   nl80211_match_policy);
5413                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5414                         if (ssid) {
5415                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5416                                         err = -EINVAL;
5417                                         goto out_free;
5418                                 }
5419                                 memcpy(request->match_sets[i].ssid.ssid,
5420                                        nla_data(ssid), nla_len(ssid));
5421                                 request->match_sets[i].ssid.ssid_len =
5422                                         nla_len(ssid);
5423                         }
5424                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5425                         if (rssi)
5426                                 request->rssi_thold = nla_get_u32(rssi);
5427                         else
5428                                 request->rssi_thold =
5429                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5430                         i++;
5431                 }
5432         }
5433
5434         if (info->attrs[NL80211_ATTR_IE]) {
5435                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5436                 memcpy((void *)request->ie,
5437                        nla_data(info->attrs[NL80211_ATTR_IE]),
5438                        request->ie_len);
5439         }
5440
5441         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5442                 request->flags = nla_get_u32(
5443                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5444                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5445                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5446                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5447                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5448                         err = -EOPNOTSUPP;
5449                         goto out_free;
5450                 }
5451         }
5452
5453         request->dev = dev;
5454         request->wiphy = &rdev->wiphy;
5455         request->interval = interval;
5456         request->scan_start = jiffies;
5457
5458         err = rdev_sched_scan_start(rdev, dev, request);
5459         if (!err) {
5460                 rdev->sched_scan_req = request;
5461                 nl80211_send_sched_scan(rdev, dev,
5462                                         NL80211_CMD_START_SCHED_SCAN);
5463                 goto out;
5464         }
5465
5466 out_free:
5467         kfree(request);
5468 out:
5469         return err;
5470 }
5471
5472 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5473                                    struct genl_info *info)
5474 {
5475         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5476
5477         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5478             !rdev->ops->sched_scan_stop)
5479                 return -EOPNOTSUPP;
5480
5481         return __cfg80211_stop_sched_scan(rdev, false);
5482 }
5483
5484 static int nl80211_start_radar_detection(struct sk_buff *skb,
5485                                          struct genl_info *info)
5486 {
5487         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5488         struct net_device *dev = info->user_ptr[1];
5489         struct wireless_dev *wdev = dev->ieee80211_ptr;
5490         struct cfg80211_chan_def chandef;
5491         int err;
5492
5493         err = nl80211_parse_chandef(rdev, info, &chandef);
5494         if (err)
5495                 return err;
5496
5497         if (wdev->cac_started)
5498                 return -EBUSY;
5499
5500         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5501         if (err < 0)
5502                 return err;
5503
5504         if (err == 0)
5505                 return -EINVAL;
5506
5507         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5508                 return -EINVAL;
5509
5510         if (!rdev->ops->start_radar_detection)
5511                 return -EOPNOTSUPP;
5512
5513         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5514                                            chandef.chan, CHAN_MODE_SHARED,
5515                                            BIT(chandef.width));
5516         if (err)
5517                 return err;
5518
5519         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5520         if (!err) {
5521                 wdev->channel = chandef.chan;
5522                 wdev->cac_started = true;
5523                 wdev->cac_start_time = jiffies;
5524         }
5525         return err;
5526 }
5527
5528 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5529                             u32 seq, int flags,
5530                             struct cfg80211_registered_device *rdev,
5531                             struct wireless_dev *wdev,
5532                             struct cfg80211_internal_bss *intbss)
5533 {
5534         struct cfg80211_bss *res = &intbss->pub;
5535         const struct cfg80211_bss_ies *ies;
5536         void *hdr;
5537         struct nlattr *bss;
5538         bool tsf = false;
5539
5540         ASSERT_WDEV_LOCK(wdev);
5541
5542         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5543                              NL80211_CMD_NEW_SCAN_RESULTS);
5544         if (!hdr)
5545                 return -1;
5546
5547         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5548
5549         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5550                 goto nla_put_failure;
5551         if (wdev->netdev &&
5552             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5553                 goto nla_put_failure;
5554         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5555                 goto nla_put_failure;
5556
5557         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5558         if (!bss)
5559                 goto nla_put_failure;
5560         if ((!is_zero_ether_addr(res->bssid) &&
5561              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5562                 goto nla_put_failure;
5563
5564         rcu_read_lock();
5565         ies = rcu_dereference(res->ies);
5566         if (ies) {
5567                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5568                         goto fail_unlock_rcu;
5569                 tsf = true;
5570                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5571                                         ies->len, ies->data))
5572                         goto fail_unlock_rcu;
5573         }
5574         ies = rcu_dereference(res->beacon_ies);
5575         if (ies) {
5576                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5577                         goto fail_unlock_rcu;
5578                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5579                                         ies->len, ies->data))
5580                         goto fail_unlock_rcu;
5581         }
5582         rcu_read_unlock();
5583
5584         if (res->beacon_interval &&
5585             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5586                 goto nla_put_failure;
5587         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5588             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5589             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5590                         jiffies_to_msecs(jiffies - intbss->ts)))
5591                 goto nla_put_failure;
5592
5593         switch (rdev->wiphy.signal_type) {
5594         case CFG80211_SIGNAL_TYPE_MBM:
5595                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5596                         goto nla_put_failure;
5597                 break;
5598         case CFG80211_SIGNAL_TYPE_UNSPEC:
5599                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5600                         goto nla_put_failure;
5601                 break;
5602         default:
5603                 break;
5604         }
5605
5606         switch (wdev->iftype) {
5607         case NL80211_IFTYPE_P2P_CLIENT:
5608         case NL80211_IFTYPE_STATION:
5609                 if (intbss == wdev->current_bss &&
5610                     nla_put_u32(msg, NL80211_BSS_STATUS,
5611                                 NL80211_BSS_STATUS_ASSOCIATED))
5612                         goto nla_put_failure;
5613                 break;
5614         case NL80211_IFTYPE_ADHOC:
5615                 if (intbss == wdev->current_bss &&
5616                     nla_put_u32(msg, NL80211_BSS_STATUS,
5617                                 NL80211_BSS_STATUS_IBSS_JOINED))
5618                         goto nla_put_failure;
5619                 break;
5620         default:
5621                 break;
5622         }
5623
5624         nla_nest_end(msg, bss);
5625
5626         return genlmsg_end(msg, hdr);
5627
5628  fail_unlock_rcu:
5629         rcu_read_unlock();
5630  nla_put_failure:
5631         genlmsg_cancel(msg, hdr);
5632         return -EMSGSIZE;
5633 }
5634
5635 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5636 {
5637         struct cfg80211_registered_device *rdev;
5638         struct cfg80211_internal_bss *scan;
5639         struct wireless_dev *wdev;
5640         int start = cb->args[2], idx = 0;
5641         int err;
5642
5643         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5644         if (err)
5645                 return err;
5646
5647         wdev_lock(wdev);
5648         spin_lock_bh(&rdev->bss_lock);
5649         cfg80211_bss_expire(rdev);
5650
5651         cb->seq = rdev->bss_generation;
5652
5653         list_for_each_entry(scan, &rdev->bss_list, list) {
5654                 if (++idx <= start)
5655                         continue;
5656                 if (nl80211_send_bss(skb, cb,
5657                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5658                                 rdev, wdev, scan) < 0) {
5659                         idx--;
5660                         break;
5661                 }
5662         }
5663
5664         spin_unlock_bh(&rdev->bss_lock);
5665         wdev_unlock(wdev);
5666
5667         cb->args[2] = idx;
5668         nl80211_finish_wdev_dump(rdev);
5669
5670         return skb->len;
5671 }
5672
5673 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5674                                 int flags, struct net_device *dev,
5675                                 struct survey_info *survey)
5676 {
5677         void *hdr;
5678         struct nlattr *infoattr;
5679
5680         hdr = nl80211hdr_put(msg, portid, seq, flags,
5681                              NL80211_CMD_NEW_SURVEY_RESULTS);
5682         if (!hdr)
5683                 return -ENOMEM;
5684
5685         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5686                 goto nla_put_failure;
5687
5688         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5689         if (!infoattr)
5690                 goto nla_put_failure;
5691
5692         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5693                         survey->channel->center_freq))
5694                 goto nla_put_failure;
5695
5696         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5697             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5698                 goto nla_put_failure;
5699         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5700             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5701                 goto nla_put_failure;
5702         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5703             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5704                         survey->channel_time))
5705                 goto nla_put_failure;
5706         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5707             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5708                         survey->channel_time_busy))
5709                 goto nla_put_failure;
5710         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5711             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5712                         survey->channel_time_ext_busy))
5713                 goto nla_put_failure;
5714         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5715             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5716                         survey->channel_time_rx))
5717                 goto nla_put_failure;
5718         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5719             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5720                         survey->channel_time_tx))
5721                 goto nla_put_failure;
5722
5723         nla_nest_end(msg, infoattr);
5724
5725         return genlmsg_end(msg, hdr);
5726
5727  nla_put_failure:
5728         genlmsg_cancel(msg, hdr);
5729         return -EMSGSIZE;
5730 }
5731
5732 static int nl80211_dump_survey(struct sk_buff *skb,
5733                         struct netlink_callback *cb)
5734 {
5735         struct survey_info survey;
5736         struct cfg80211_registered_device *dev;
5737         struct wireless_dev *wdev;
5738         int survey_idx = cb->args[2];
5739         int res;
5740
5741         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5742         if (res)
5743                 return res;
5744
5745         if (!wdev->netdev) {
5746                 res = -EINVAL;
5747                 goto out_err;
5748         }
5749
5750         if (!dev->ops->dump_survey) {
5751                 res = -EOPNOTSUPP;
5752                 goto out_err;
5753         }
5754
5755         while (1) {
5756                 struct ieee80211_channel *chan;
5757
5758                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5759                 if (res == -ENOENT)
5760                         break;
5761                 if (res)
5762                         goto out_err;
5763
5764                 /* Survey without a channel doesn't make sense */
5765                 if (!survey.channel) {
5766                         res = -EINVAL;
5767                         goto out;
5768                 }
5769
5770                 chan = ieee80211_get_channel(&dev->wiphy,
5771                                              survey.channel->center_freq);
5772                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5773                         survey_idx++;
5774                         continue;
5775                 }
5776
5777                 if (nl80211_send_survey(skb,
5778                                 NETLINK_CB(cb->skb).portid,
5779                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5780                                 wdev->netdev, &survey) < 0)
5781                         goto out;
5782                 survey_idx++;
5783         }
5784
5785  out:
5786         cb->args[2] = survey_idx;
5787         res = skb->len;
5788  out_err:
5789         nl80211_finish_wdev_dump(dev);
5790         return res;
5791 }
5792
5793 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5794 {
5795         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5796                                   NL80211_WPA_VERSION_2));
5797 }
5798
5799 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5800 {
5801         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5802         struct net_device *dev = info->user_ptr[1];
5803         struct ieee80211_channel *chan;
5804         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5805         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5806         enum nl80211_auth_type auth_type;
5807         struct key_parse key;
5808         bool local_state_change;
5809
5810         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5811                 return -EINVAL;
5812
5813         if (!info->attrs[NL80211_ATTR_MAC])
5814                 return -EINVAL;
5815
5816         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5817                 return -EINVAL;
5818
5819         if (!info->attrs[NL80211_ATTR_SSID])
5820                 return -EINVAL;
5821
5822         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5823                 return -EINVAL;
5824
5825         err = nl80211_parse_key(info, &key);
5826         if (err)
5827                 return err;
5828
5829         if (key.idx >= 0) {
5830                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5831                         return -EINVAL;
5832                 if (!key.p.key || !key.p.key_len)
5833                         return -EINVAL;
5834                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5835                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5836                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5837                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5838                         return -EINVAL;
5839                 if (key.idx > 4)
5840                         return -EINVAL;
5841         } else {
5842                 key.p.key_len = 0;
5843                 key.p.key = NULL;
5844         }
5845
5846         if (key.idx >= 0) {
5847                 int i;
5848                 bool ok = false;
5849                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5850                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5851                                 ok = true;
5852                                 break;
5853                         }
5854                 }
5855                 if (!ok)
5856                         return -EINVAL;
5857         }
5858
5859         if (!rdev->ops->auth)
5860                 return -EOPNOTSUPP;
5861
5862         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5863             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5864                 return -EOPNOTSUPP;
5865
5866         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5867         chan = ieee80211_get_channel(&rdev->wiphy,
5868                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5869         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5870                 return -EINVAL;
5871
5872         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5873         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5874
5875         if (info->attrs[NL80211_ATTR_IE]) {
5876                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5877                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5878         }
5879
5880         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5881         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5882                 return -EINVAL;
5883
5884         if (auth_type == NL80211_AUTHTYPE_SAE &&
5885             !info->attrs[NL80211_ATTR_SAE_DATA])
5886                 return -EINVAL;
5887
5888         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5889                 if (auth_type != NL80211_AUTHTYPE_SAE)
5890                         return -EINVAL;
5891                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5892                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5893                 /* need to include at least Auth Transaction and Status Code */
5894                 if (sae_data_len < 4)
5895                         return -EINVAL;
5896         }
5897
5898         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5899
5900         /*
5901          * Since we no longer track auth state, ignore
5902          * requests to only change local state.
5903          */
5904         if (local_state_change)
5905                 return 0;
5906
5907         wdev_lock(dev->ieee80211_ptr);
5908         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5909                                  ssid, ssid_len, ie, ie_len,
5910                                  key.p.key, key.p.key_len, key.idx,
5911                                  sae_data, sae_data_len);
5912         wdev_unlock(dev->ieee80211_ptr);
5913         return err;
5914 }
5915
5916 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5917                                    struct genl_info *info,
5918                                    struct cfg80211_crypto_settings *settings,
5919                                    int cipher_limit)
5920 {
5921         memset(settings, 0, sizeof(*settings));
5922
5923         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5924
5925         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5926                 u16 proto;
5927                 proto = nla_get_u16(
5928                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5929                 settings->control_port_ethertype = cpu_to_be16(proto);
5930                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5931                     proto != ETH_P_PAE)
5932                         return -EINVAL;
5933                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5934                         settings->control_port_no_encrypt = true;
5935         } else
5936                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5937
5938         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5939                 void *data;
5940                 int len, i;
5941
5942                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5943                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5944                 settings->n_ciphers_pairwise = len / sizeof(u32);
5945
5946                 if (len % sizeof(u32))
5947                         return -EINVAL;
5948
5949                 if (settings->n_ciphers_pairwise > cipher_limit)
5950                         return -EINVAL;
5951
5952                 memcpy(settings->ciphers_pairwise, data, len);
5953
5954                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5955                         if (!cfg80211_supported_cipher_suite(
5956                                         &rdev->wiphy,
5957                                         settings->ciphers_pairwise[i]))
5958                                 return -EINVAL;
5959         }
5960
5961         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5962                 settings->cipher_group =
5963                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5964                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5965                                                      settings->cipher_group))
5966                         return -EINVAL;
5967         }
5968
5969         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5970                 settings->wpa_versions =
5971                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5972                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5973                         return -EINVAL;
5974         }
5975
5976         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5977                 void *data;
5978                 int len;
5979
5980                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5981                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5982                 settings->n_akm_suites = len / sizeof(u32);
5983
5984                 if (len % sizeof(u32))
5985                         return -EINVAL;
5986
5987                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5988                         return -EINVAL;
5989
5990                 memcpy(settings->akm_suites, data, len);
5991         }
5992
5993         return 0;
5994 }
5995
5996 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5997 {
5998         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5999         struct net_device *dev = info->user_ptr[1];
6000         struct ieee80211_channel *chan;
6001         struct cfg80211_assoc_request req = {};
6002         const u8 *bssid, *ssid;
6003         int err, ssid_len = 0;
6004
6005         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6006                 return -EINVAL;
6007
6008         if (!info->attrs[NL80211_ATTR_MAC] ||
6009             !info->attrs[NL80211_ATTR_SSID] ||
6010             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6011                 return -EINVAL;
6012
6013         if (!rdev->ops->assoc)
6014                 return -EOPNOTSUPP;
6015
6016         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6017             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6018                 return -EOPNOTSUPP;
6019
6020         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6021
6022         chan = ieee80211_get_channel(&rdev->wiphy,
6023                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6024         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6025                 return -EINVAL;
6026
6027         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6028         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6029
6030         if (info->attrs[NL80211_ATTR_IE]) {
6031                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6032                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6033         }
6034
6035         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6036                 enum nl80211_mfp mfp =
6037                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6038                 if (mfp == NL80211_MFP_REQUIRED)
6039                         req.use_mfp = true;
6040                 else if (mfp != NL80211_MFP_NO)
6041                         return -EINVAL;
6042         }
6043
6044         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6045                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6046
6047         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6048                 req.flags |= ASSOC_REQ_DISABLE_HT;
6049
6050         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6051                 memcpy(&req.ht_capa_mask,
6052                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6053                        sizeof(req.ht_capa_mask));
6054
6055         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6056                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6057                         return -EINVAL;
6058                 memcpy(&req.ht_capa,
6059                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6060                        sizeof(req.ht_capa));
6061         }
6062
6063         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6064                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6065
6066         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6067                 memcpy(&req.vht_capa_mask,
6068                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6069                        sizeof(req.vht_capa_mask));
6070
6071         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6072                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6073                         return -EINVAL;
6074                 memcpy(&req.vht_capa,
6075                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6076                        sizeof(req.vht_capa));
6077         }
6078
6079         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6080         if (!err) {
6081                 wdev_lock(dev->ieee80211_ptr);
6082                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6083                                           ssid, ssid_len, &req);
6084                 wdev_unlock(dev->ieee80211_ptr);
6085         }
6086
6087         return err;
6088 }
6089
6090 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6091 {
6092         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6093         struct net_device *dev = info->user_ptr[1];
6094         const u8 *ie = NULL, *bssid;
6095         int ie_len = 0, err;
6096         u16 reason_code;
6097         bool local_state_change;
6098
6099         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6100                 return -EINVAL;
6101
6102         if (!info->attrs[NL80211_ATTR_MAC])
6103                 return -EINVAL;
6104
6105         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6106                 return -EINVAL;
6107
6108         if (!rdev->ops->deauth)
6109                 return -EOPNOTSUPP;
6110
6111         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6112             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6113                 return -EOPNOTSUPP;
6114
6115         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6116
6117         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6118         if (reason_code == 0) {
6119                 /* Reason Code 0 is reserved */
6120                 return -EINVAL;
6121         }
6122
6123         if (info->attrs[NL80211_ATTR_IE]) {
6124                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6125                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6126         }
6127
6128         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6129
6130         wdev_lock(dev->ieee80211_ptr);
6131         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6132                                    local_state_change);
6133         wdev_unlock(dev->ieee80211_ptr);
6134         return err;
6135 }
6136
6137 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6138 {
6139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6140         struct net_device *dev = info->user_ptr[1];
6141         const u8 *ie = NULL, *bssid;
6142         int ie_len = 0, err;
6143         u16 reason_code;
6144         bool local_state_change;
6145
6146         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6147                 return -EINVAL;
6148
6149         if (!info->attrs[NL80211_ATTR_MAC])
6150                 return -EINVAL;
6151
6152         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6153                 return -EINVAL;
6154
6155         if (!rdev->ops->disassoc)
6156                 return -EOPNOTSUPP;
6157
6158         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6159             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6160                 return -EOPNOTSUPP;
6161
6162         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6163
6164         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6165         if (reason_code == 0) {
6166                 /* Reason Code 0 is reserved */
6167                 return -EINVAL;
6168         }
6169
6170         if (info->attrs[NL80211_ATTR_IE]) {
6171                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6172                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6173         }
6174
6175         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6176
6177         wdev_lock(dev->ieee80211_ptr);
6178         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6179                                      local_state_change);
6180         wdev_unlock(dev->ieee80211_ptr);
6181         return err;
6182 }
6183
6184 static bool
6185 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6186                          int mcast_rate[IEEE80211_NUM_BANDS],
6187                          int rateval)
6188 {
6189         struct wiphy *wiphy = &rdev->wiphy;
6190         bool found = false;
6191         int band, i;
6192
6193         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6194                 struct ieee80211_supported_band *sband;
6195
6196                 sband = wiphy->bands[band];
6197                 if (!sband)
6198                         continue;
6199
6200                 for (i = 0; i < sband->n_bitrates; i++) {
6201                         if (sband->bitrates[i].bitrate == rateval) {
6202                                 mcast_rate[band] = i + 1;
6203                                 found = true;
6204                                 break;
6205                         }
6206                 }
6207         }
6208
6209         return found;
6210 }
6211
6212 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6213 {
6214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6215         struct net_device *dev = info->user_ptr[1];
6216         struct cfg80211_ibss_params ibss;
6217         struct wiphy *wiphy;
6218         struct cfg80211_cached_keys *connkeys = NULL;
6219         int err;
6220
6221         memset(&ibss, 0, sizeof(ibss));
6222
6223         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6224                 return -EINVAL;
6225
6226         if (!info->attrs[NL80211_ATTR_SSID] ||
6227             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6228                 return -EINVAL;
6229
6230         ibss.beacon_interval = 100;
6231
6232         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6233                 ibss.beacon_interval =
6234                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6235                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6236                         return -EINVAL;
6237         }
6238
6239         if (!rdev->ops->join_ibss)
6240                 return -EOPNOTSUPP;
6241
6242         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6243                 return -EOPNOTSUPP;
6244
6245         wiphy = &rdev->wiphy;
6246
6247         if (info->attrs[NL80211_ATTR_MAC]) {
6248                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6249
6250                 if (!is_valid_ether_addr(ibss.bssid))
6251                         return -EINVAL;
6252         }
6253         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6254         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6255
6256         if (info->attrs[NL80211_ATTR_IE]) {
6257                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6258                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6259         }
6260
6261         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6262         if (err)
6263                 return err;
6264
6265         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6266                 return -EINVAL;
6267
6268         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
6269                 return -EINVAL;
6270         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
6271             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
6272                 return -EINVAL;
6273
6274         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6275         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6276
6277         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6278                 u8 *rates =
6279                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6280                 int n_rates =
6281                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6282                 struct ieee80211_supported_band *sband =
6283                         wiphy->bands[ibss.chandef.chan->band];
6284
6285                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6286                                              &ibss.basic_rates);
6287                 if (err)
6288                         return err;
6289         }
6290
6291         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6292             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6293                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6294                 return -EINVAL;
6295
6296         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6297                 bool no_ht = false;
6298
6299                 connkeys = nl80211_parse_connkeys(rdev,
6300                                           info->attrs[NL80211_ATTR_KEYS],
6301                                           &no_ht);
6302                 if (IS_ERR(connkeys))
6303                         return PTR_ERR(connkeys);
6304
6305                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6306                     no_ht) {
6307                         kfree(connkeys);
6308                         return -EINVAL;
6309                 }
6310         }
6311
6312         ibss.control_port =
6313                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6314
6315         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6316         if (err)
6317                 kfree(connkeys);
6318         return err;
6319 }
6320
6321 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6322 {
6323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6324         struct net_device *dev = info->user_ptr[1];
6325
6326         if (!rdev->ops->leave_ibss)
6327                 return -EOPNOTSUPP;
6328
6329         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6330                 return -EOPNOTSUPP;
6331
6332         return cfg80211_leave_ibss(rdev, dev, false);
6333 }
6334
6335 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6336 {
6337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6338         struct net_device *dev = info->user_ptr[1];
6339         int mcast_rate[IEEE80211_NUM_BANDS];
6340         u32 nla_rate;
6341         int err;
6342
6343         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6344             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6345                 return -EOPNOTSUPP;
6346
6347         if (!rdev->ops->set_mcast_rate)
6348                 return -EOPNOTSUPP;
6349
6350         memset(mcast_rate, 0, sizeof(mcast_rate));
6351
6352         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6353                 return -EINVAL;
6354
6355         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6356         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6357                 return -EINVAL;
6358
6359         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6360
6361         return err;
6362 }
6363
6364
6365 #ifdef CONFIG_NL80211_TESTMODE
6366 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6367         .name = "testmode",
6368 };
6369
6370 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6371 {
6372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6373         int err;
6374
6375         if (!info->attrs[NL80211_ATTR_TESTDATA])
6376                 return -EINVAL;
6377
6378         err = -EOPNOTSUPP;
6379         if (rdev->ops->testmode_cmd) {
6380                 rdev->testmode_info = info;
6381                 err = rdev_testmode_cmd(rdev,
6382                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6383                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6384                 rdev->testmode_info = NULL;
6385         }
6386
6387         return err;
6388 }
6389
6390 static int nl80211_testmode_dump(struct sk_buff *skb,
6391                                  struct netlink_callback *cb)
6392 {
6393         struct cfg80211_registered_device *rdev;
6394         int err;
6395         long phy_idx;
6396         void *data = NULL;
6397         int data_len = 0;
6398
6399         rtnl_lock();
6400
6401         if (cb->args[0]) {
6402                 /*
6403                  * 0 is a valid index, but not valid for args[0],
6404                  * so we need to offset by 1.
6405                  */
6406                 phy_idx = cb->args[0] - 1;
6407         } else {
6408                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6409                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6410                                   nl80211_policy);
6411                 if (err)
6412                         goto out_err;
6413
6414                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6415                                                   nl80211_fam.attrbuf);
6416                 if (IS_ERR(rdev)) {
6417                         err = PTR_ERR(rdev);
6418                         goto out_err;
6419                 }
6420                 phy_idx = rdev->wiphy_idx;
6421                 rdev = NULL;
6422
6423                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6424                         cb->args[1] =
6425                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6426         }
6427
6428         if (cb->args[1]) {
6429                 data = nla_data((void *)cb->args[1]);
6430                 data_len = nla_len((void *)cb->args[1]);
6431         }
6432
6433         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6434         if (!rdev) {
6435                 err = -ENOENT;
6436                 goto out_err;
6437         }
6438
6439         if (!rdev->ops->testmode_dump) {
6440                 err = -EOPNOTSUPP;
6441                 goto out_err;
6442         }
6443
6444         while (1) {
6445                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6446                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6447                                            NL80211_CMD_TESTMODE);
6448                 struct nlattr *tmdata;
6449
6450                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6451                         genlmsg_cancel(skb, hdr);
6452                         break;
6453                 }
6454
6455                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6456                 if (!tmdata) {
6457                         genlmsg_cancel(skb, hdr);
6458                         break;
6459                 }
6460                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6461                 nla_nest_end(skb, tmdata);
6462
6463                 if (err == -ENOBUFS || err == -ENOENT) {
6464                         genlmsg_cancel(skb, hdr);
6465                         break;
6466                 } else if (err) {
6467                         genlmsg_cancel(skb, hdr);
6468                         goto out_err;
6469                 }
6470
6471                 genlmsg_end(skb, hdr);
6472         }
6473
6474         err = skb->len;
6475         /* see above */
6476         cb->args[0] = phy_idx + 1;
6477  out_err:
6478         rtnl_unlock();
6479         return err;
6480 }
6481
6482 static struct sk_buff *
6483 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6484                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6485 {
6486         struct sk_buff *skb;
6487         void *hdr;
6488         struct nlattr *data;
6489
6490         skb = nlmsg_new(approxlen + 100, gfp);
6491         if (!skb)
6492                 return NULL;
6493
6494         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6495         if (!hdr) {
6496                 kfree_skb(skb);
6497                 return NULL;
6498         }
6499
6500         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6501                 goto nla_put_failure;
6502         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6503
6504         ((void **)skb->cb)[0] = rdev;
6505         ((void **)skb->cb)[1] = hdr;
6506         ((void **)skb->cb)[2] = data;
6507
6508         return skb;
6509
6510  nla_put_failure:
6511         kfree_skb(skb);
6512         return NULL;
6513 }
6514
6515 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6516                                                   int approxlen)
6517 {
6518         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6519
6520         if (WARN_ON(!rdev->testmode_info))
6521                 return NULL;
6522
6523         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6524                                 rdev->testmode_info->snd_portid,
6525                                 rdev->testmode_info->snd_seq,
6526                                 GFP_KERNEL);
6527 }
6528 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6529
6530 int cfg80211_testmode_reply(struct sk_buff *skb)
6531 {
6532         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6533         void *hdr = ((void **)skb->cb)[1];
6534         struct nlattr *data = ((void **)skb->cb)[2];
6535
6536         if (WARN_ON(!rdev->testmode_info)) {
6537                 kfree_skb(skb);
6538                 return -EINVAL;
6539         }
6540
6541         nla_nest_end(skb, data);
6542         genlmsg_end(skb, hdr);
6543         return genlmsg_reply(skb, rdev->testmode_info);
6544 }
6545 EXPORT_SYMBOL(cfg80211_testmode_reply);
6546
6547 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6548                                                   int approxlen, gfp_t gfp)
6549 {
6550         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6551
6552         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6553 }
6554 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6555
6556 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6557 {
6558         void *hdr = ((void **)skb->cb)[1];
6559         struct nlattr *data = ((void **)skb->cb)[2];
6560
6561         nla_nest_end(skb, data);
6562         genlmsg_end(skb, hdr);
6563         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6564 }
6565 EXPORT_SYMBOL(cfg80211_testmode_event);
6566 #endif
6567
6568 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6569 {
6570         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6571         struct net_device *dev = info->user_ptr[1];
6572         struct cfg80211_connect_params connect;
6573         struct wiphy *wiphy;
6574         struct cfg80211_cached_keys *connkeys = NULL;
6575         int err;
6576
6577         memset(&connect, 0, sizeof(connect));
6578
6579         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6580                 return -EINVAL;
6581
6582         if (!info->attrs[NL80211_ATTR_SSID] ||
6583             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6584                 return -EINVAL;
6585
6586         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6587                 connect.auth_type =
6588                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6589                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6590                                              NL80211_CMD_CONNECT))
6591                         return -EINVAL;
6592         } else
6593                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6594
6595         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6596
6597         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6598                                       NL80211_MAX_NR_CIPHER_SUITES);
6599         if (err)
6600                 return err;
6601
6602         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6603             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6604                 return -EOPNOTSUPP;
6605
6606         wiphy = &rdev->wiphy;
6607
6608         connect.bg_scan_period = -1;
6609         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6610                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6611                 connect.bg_scan_period =
6612                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6613         }
6614
6615         if (info->attrs[NL80211_ATTR_MAC])
6616                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6617         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6618         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6619
6620         if (info->attrs[NL80211_ATTR_IE]) {
6621                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6622                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6623         }
6624
6625         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6626                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6627                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6628                     connect.mfp != NL80211_MFP_NO)
6629                         return -EINVAL;
6630         } else {
6631                 connect.mfp = NL80211_MFP_NO;
6632         }
6633
6634         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6635                 connect.channel =
6636                         ieee80211_get_channel(wiphy,
6637                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6638                 if (!connect.channel ||
6639                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6640                         return -EINVAL;
6641         }
6642
6643         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6644                 connkeys = nl80211_parse_connkeys(rdev,
6645                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6646                 if (IS_ERR(connkeys))
6647                         return PTR_ERR(connkeys);
6648         }
6649
6650         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6651                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6652
6653         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6654                 memcpy(&connect.ht_capa_mask,
6655                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6656                        sizeof(connect.ht_capa_mask));
6657
6658         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6659                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6660                         kfree(connkeys);
6661                         return -EINVAL;
6662                 }
6663                 memcpy(&connect.ht_capa,
6664                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6665                        sizeof(connect.ht_capa));
6666         }
6667
6668         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6669                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6670
6671         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6672                 memcpy(&connect.vht_capa_mask,
6673                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6674                        sizeof(connect.vht_capa_mask));
6675
6676         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6677                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6678                         kfree(connkeys);
6679                         return -EINVAL;
6680                 }
6681                 memcpy(&connect.vht_capa,
6682                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6683                        sizeof(connect.vht_capa));
6684         }
6685
6686         wdev_lock(dev->ieee80211_ptr);
6687         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
6688         wdev_unlock(dev->ieee80211_ptr);
6689         if (err)
6690                 kfree(connkeys);
6691         return err;
6692 }
6693
6694 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6695 {
6696         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6697         struct net_device *dev = info->user_ptr[1];
6698         u16 reason;
6699         int ret;
6700
6701         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6702                 reason = WLAN_REASON_DEAUTH_LEAVING;
6703         else
6704                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6705
6706         if (reason == 0)
6707                 return -EINVAL;
6708
6709         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6710             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6711                 return -EOPNOTSUPP;
6712
6713         wdev_lock(dev->ieee80211_ptr);
6714         ret = cfg80211_disconnect(rdev, dev, reason, true);
6715         wdev_unlock(dev->ieee80211_ptr);
6716         return ret;
6717 }
6718
6719 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6720 {
6721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6722         struct net *net;
6723         int err;
6724         u32 pid;
6725
6726         if (!info->attrs[NL80211_ATTR_PID])
6727                 return -EINVAL;
6728
6729         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6730
6731         net = get_net_ns_by_pid(pid);
6732         if (IS_ERR(net))
6733                 return PTR_ERR(net);
6734
6735         err = 0;
6736
6737         /* check if anything to do */
6738         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6739                 err = cfg80211_switch_netns(rdev, net);
6740
6741         put_net(net);
6742         return err;
6743 }
6744
6745 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6746 {
6747         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6748         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6749                         struct cfg80211_pmksa *pmksa) = NULL;
6750         struct net_device *dev = info->user_ptr[1];
6751         struct cfg80211_pmksa pmksa;
6752
6753         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6754
6755         if (!info->attrs[NL80211_ATTR_MAC])
6756                 return -EINVAL;
6757
6758         if (!info->attrs[NL80211_ATTR_PMKID])
6759                 return -EINVAL;
6760
6761         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6762         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6763
6764         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6765             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6766                 return -EOPNOTSUPP;
6767
6768         switch (info->genlhdr->cmd) {
6769         case NL80211_CMD_SET_PMKSA:
6770                 rdev_ops = rdev->ops->set_pmksa;
6771                 break;
6772         case NL80211_CMD_DEL_PMKSA:
6773                 rdev_ops = rdev->ops->del_pmksa;
6774                 break;
6775         default:
6776                 WARN_ON(1);
6777                 break;
6778         }
6779
6780         if (!rdev_ops)
6781                 return -EOPNOTSUPP;
6782
6783         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6784 }
6785
6786 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6787 {
6788         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6789         struct net_device *dev = info->user_ptr[1];
6790
6791         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6792             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6793                 return -EOPNOTSUPP;
6794
6795         if (!rdev->ops->flush_pmksa)
6796                 return -EOPNOTSUPP;
6797
6798         return rdev_flush_pmksa(rdev, dev);
6799 }
6800
6801 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6802 {
6803         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6804         struct net_device *dev = info->user_ptr[1];
6805         u8 action_code, dialog_token;
6806         u16 status_code;
6807         u8 *peer;
6808
6809         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6810             !rdev->ops->tdls_mgmt)
6811                 return -EOPNOTSUPP;
6812
6813         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6814             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6815             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6816             !info->attrs[NL80211_ATTR_IE] ||
6817             !info->attrs[NL80211_ATTR_MAC])
6818                 return -EINVAL;
6819
6820         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6821         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6822         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6823         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6824
6825         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6826                               dialog_token, status_code,
6827                               nla_data(info->attrs[NL80211_ATTR_IE]),
6828                               nla_len(info->attrs[NL80211_ATTR_IE]));
6829 }
6830
6831 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6832 {
6833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6834         struct net_device *dev = info->user_ptr[1];
6835         enum nl80211_tdls_operation operation;
6836         u8 *peer;
6837
6838         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6839             !rdev->ops->tdls_oper)
6840                 return -EOPNOTSUPP;
6841
6842         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6843             !info->attrs[NL80211_ATTR_MAC])
6844                 return -EINVAL;
6845
6846         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6847         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6848
6849         return rdev_tdls_oper(rdev, dev, peer, operation);
6850 }
6851
6852 static int nl80211_remain_on_channel(struct sk_buff *skb,
6853                                      struct genl_info *info)
6854 {
6855         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6856         struct wireless_dev *wdev = info->user_ptr[1];
6857         struct cfg80211_chan_def chandef;
6858         struct sk_buff *msg;
6859         void *hdr;
6860         u64 cookie;
6861         u32 duration;
6862         int err;
6863
6864         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6865             !info->attrs[NL80211_ATTR_DURATION])
6866                 return -EINVAL;
6867
6868         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6869
6870         if (!rdev->ops->remain_on_channel ||
6871             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6872                 return -EOPNOTSUPP;
6873
6874         /*
6875          * We should be on that channel for at least a minimum amount of
6876          * time (10ms) but no longer than the driver supports.
6877          */
6878         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6879             duration > rdev->wiphy.max_remain_on_channel_duration)
6880                 return -EINVAL;
6881
6882         err = nl80211_parse_chandef(rdev, info, &chandef);
6883         if (err)
6884                 return err;
6885
6886         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6887         if (!msg)
6888                 return -ENOMEM;
6889
6890         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6891                              NL80211_CMD_REMAIN_ON_CHANNEL);
6892
6893         if (IS_ERR(hdr)) {
6894                 err = PTR_ERR(hdr);
6895                 goto free_msg;
6896         }
6897
6898         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6899                                      duration, &cookie);
6900
6901         if (err)
6902                 goto free_msg;
6903
6904         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6905                 goto nla_put_failure;
6906
6907         genlmsg_end(msg, hdr);
6908
6909         return genlmsg_reply(msg, info);
6910
6911  nla_put_failure:
6912         err = -ENOBUFS;
6913  free_msg:
6914         nlmsg_free(msg);
6915         return err;
6916 }
6917
6918 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6919                                             struct genl_info *info)
6920 {
6921         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6922         struct wireless_dev *wdev = info->user_ptr[1];
6923         u64 cookie;
6924
6925         if (!info->attrs[NL80211_ATTR_COOKIE])
6926                 return -EINVAL;
6927
6928         if (!rdev->ops->cancel_remain_on_channel)
6929                 return -EOPNOTSUPP;
6930
6931         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6932
6933         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6934 }
6935
6936 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6937                            u8 *rates, u8 rates_len)
6938 {
6939         u8 i;
6940         u32 mask = 0;
6941
6942         for (i = 0; i < rates_len; i++) {
6943                 int rate = (rates[i] & 0x7f) * 5;
6944                 int ridx;
6945                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6946                         struct ieee80211_rate *srate =
6947                                 &sband->bitrates[ridx];
6948                         if (rate == srate->bitrate) {
6949                                 mask |= 1 << ridx;
6950                                 break;
6951                         }
6952                 }
6953                 if (ridx == sband->n_bitrates)
6954                         return 0; /* rate not found */
6955         }
6956
6957         return mask;
6958 }
6959
6960 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6961                                u8 *rates, u8 rates_len,
6962                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6963 {
6964         u8 i;
6965
6966         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6967
6968         for (i = 0; i < rates_len; i++) {
6969                 int ridx, rbit;
6970
6971                 ridx = rates[i] / 8;
6972                 rbit = BIT(rates[i] % 8);
6973
6974                 /* check validity */
6975                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6976                         return false;
6977
6978                 /* check availability */
6979                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6980                         mcs[ridx] |= rbit;
6981                 else
6982                         return false;
6983         }
6984
6985         return true;
6986 }
6987
6988 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6989         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6990                                     .len = NL80211_MAX_SUPP_RATES },
6991         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6992                                  .len = NL80211_MAX_SUPP_HT_RATES },
6993 };
6994
6995 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6996                                        struct genl_info *info)
6997 {
6998         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6999         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7000         struct cfg80211_bitrate_mask mask;
7001         int rem, i;
7002         struct net_device *dev = info->user_ptr[1];
7003         struct nlattr *tx_rates;
7004         struct ieee80211_supported_band *sband;
7005
7006         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7007                 return -EINVAL;
7008
7009         if (!rdev->ops->set_bitrate_mask)
7010                 return -EOPNOTSUPP;
7011
7012         memset(&mask, 0, sizeof(mask));
7013         /* Default to all rates enabled */
7014         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7015                 sband = rdev->wiphy.bands[i];
7016                 mask.control[i].legacy =
7017                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7018                 if (sband)
7019                         memcpy(mask.control[i].mcs,
7020                                sband->ht_cap.mcs.rx_mask,
7021                                sizeof(mask.control[i].mcs));
7022                 else
7023                         memset(mask.control[i].mcs, 0,
7024                                sizeof(mask.control[i].mcs));
7025         }
7026
7027         /*
7028          * The nested attribute uses enum nl80211_band as the index. This maps
7029          * directly to the enum ieee80211_band values used in cfg80211.
7030          */
7031         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7032         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7033         {
7034                 enum ieee80211_band band = nla_type(tx_rates);
7035                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7036                         return -EINVAL;
7037                 sband = rdev->wiphy.bands[band];
7038                 if (sband == NULL)
7039                         return -EINVAL;
7040                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7041                           nla_len(tx_rates), nl80211_txattr_policy);
7042                 if (tb[NL80211_TXRATE_LEGACY]) {
7043                         mask.control[band].legacy = rateset_to_mask(
7044                                 sband,
7045                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7046                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7047                         if ((mask.control[band].legacy == 0) &&
7048                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7049                                 return -EINVAL;
7050                 }
7051                 if (tb[NL80211_TXRATE_MCS]) {
7052                         if (!ht_rateset_to_mask(
7053                                         sband,
7054                                         nla_data(tb[NL80211_TXRATE_MCS]),
7055                                         nla_len(tb[NL80211_TXRATE_MCS]),
7056                                         mask.control[band].mcs))
7057                                 return -EINVAL;
7058                 }
7059
7060                 if (mask.control[band].legacy == 0) {
7061                         /* don't allow empty legacy rates if HT
7062                          * is not even supported. */
7063                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7064                                 return -EINVAL;
7065
7066                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7067                                 if (mask.control[band].mcs[i])
7068                                         break;
7069
7070                         /* legacy and mcs rates may not be both empty */
7071                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7072                                 return -EINVAL;
7073                 }
7074         }
7075
7076         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7077 }
7078
7079 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7080 {
7081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7082         struct wireless_dev *wdev = info->user_ptr[1];
7083         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7084
7085         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7086                 return -EINVAL;
7087
7088         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7089                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7090
7091         switch (wdev->iftype) {
7092         case NL80211_IFTYPE_STATION:
7093         case NL80211_IFTYPE_ADHOC:
7094         case NL80211_IFTYPE_P2P_CLIENT:
7095         case NL80211_IFTYPE_AP:
7096         case NL80211_IFTYPE_AP_VLAN:
7097         case NL80211_IFTYPE_MESH_POINT:
7098         case NL80211_IFTYPE_P2P_GO:
7099         case NL80211_IFTYPE_P2P_DEVICE:
7100                 break;
7101         default:
7102                 return -EOPNOTSUPP;
7103         }
7104
7105         /* not much point in registering if we can't reply */
7106         if (!rdev->ops->mgmt_tx)
7107                 return -EOPNOTSUPP;
7108
7109         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7110                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7111                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7112 }
7113
7114 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7115 {
7116         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7117         struct wireless_dev *wdev = info->user_ptr[1];
7118         struct cfg80211_chan_def chandef;
7119         int err;
7120         void *hdr = NULL;
7121         u64 cookie;
7122         struct sk_buff *msg = NULL;
7123         unsigned int wait = 0;
7124         bool offchan, no_cck, dont_wait_for_ack;
7125
7126         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7127
7128         if (!info->attrs[NL80211_ATTR_FRAME])
7129                 return -EINVAL;
7130
7131         if (!rdev->ops->mgmt_tx)
7132                 return -EOPNOTSUPP;
7133
7134         switch (wdev->iftype) {
7135         case NL80211_IFTYPE_STATION:
7136         case NL80211_IFTYPE_ADHOC:
7137         case NL80211_IFTYPE_P2P_CLIENT:
7138         case NL80211_IFTYPE_AP:
7139         case NL80211_IFTYPE_AP_VLAN:
7140         case NL80211_IFTYPE_MESH_POINT:
7141         case NL80211_IFTYPE_P2P_GO:
7142         case NL80211_IFTYPE_P2P_DEVICE:
7143                 break;
7144         default:
7145                 return -EOPNOTSUPP;
7146         }
7147
7148         if (info->attrs[NL80211_ATTR_DURATION]) {
7149                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7150                         return -EINVAL;
7151                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7152
7153                 /*
7154                  * We should wait on the channel for at least a minimum amount
7155                  * of time (10ms) but no longer than the driver supports.
7156                  */
7157                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7158                     wait > rdev->wiphy.max_remain_on_channel_duration)
7159                         return -EINVAL;
7160
7161         }
7162
7163         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7164
7165         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7166                 return -EINVAL;
7167
7168         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7169
7170         err = nl80211_parse_chandef(rdev, info, &chandef);
7171         if (err)
7172                 return err;
7173
7174         if (!dont_wait_for_ack) {
7175                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7176                 if (!msg)
7177                         return -ENOMEM;
7178
7179                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7180                                      NL80211_CMD_FRAME);
7181
7182                 if (IS_ERR(hdr)) {
7183                         err = PTR_ERR(hdr);
7184                         goto free_msg;
7185                 }
7186         }
7187
7188         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7189                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7190                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7191                                     no_cck, dont_wait_for_ack, &cookie);
7192         if (err)
7193                 goto free_msg;
7194
7195         if (msg) {
7196                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7197                         goto nla_put_failure;
7198
7199                 genlmsg_end(msg, hdr);
7200                 return genlmsg_reply(msg, info);
7201         }
7202
7203         return 0;
7204
7205  nla_put_failure:
7206         err = -ENOBUFS;
7207  free_msg:
7208         nlmsg_free(msg);
7209         return err;
7210 }
7211
7212 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7213 {
7214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7215         struct wireless_dev *wdev = info->user_ptr[1];
7216         u64 cookie;
7217
7218         if (!info->attrs[NL80211_ATTR_COOKIE])
7219                 return -EINVAL;
7220
7221         if (!rdev->ops->mgmt_tx_cancel_wait)
7222                 return -EOPNOTSUPP;
7223
7224         switch (wdev->iftype) {
7225         case NL80211_IFTYPE_STATION:
7226         case NL80211_IFTYPE_ADHOC:
7227         case NL80211_IFTYPE_P2P_CLIENT:
7228         case NL80211_IFTYPE_AP:
7229         case NL80211_IFTYPE_AP_VLAN:
7230         case NL80211_IFTYPE_P2P_GO:
7231         case NL80211_IFTYPE_P2P_DEVICE:
7232                 break;
7233         default:
7234                 return -EOPNOTSUPP;
7235         }
7236
7237         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7238
7239         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7240 }
7241
7242 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7243 {
7244         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7245         struct wireless_dev *wdev;
7246         struct net_device *dev = info->user_ptr[1];
7247         u8 ps_state;
7248         bool state;
7249         int err;
7250
7251         if (!info->attrs[NL80211_ATTR_PS_STATE])
7252                 return -EINVAL;
7253
7254         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7255
7256         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7257                 return -EINVAL;
7258
7259         wdev = dev->ieee80211_ptr;
7260
7261         if (!rdev->ops->set_power_mgmt)
7262                 return -EOPNOTSUPP;
7263
7264         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7265
7266         if (state == wdev->ps)
7267                 return 0;
7268
7269         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7270         if (!err)
7271                 wdev->ps = state;
7272         return err;
7273 }
7274
7275 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7276 {
7277         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7278         enum nl80211_ps_state ps_state;
7279         struct wireless_dev *wdev;
7280         struct net_device *dev = info->user_ptr[1];
7281         struct sk_buff *msg;
7282         void *hdr;
7283         int err;
7284
7285         wdev = dev->ieee80211_ptr;
7286
7287         if (!rdev->ops->set_power_mgmt)
7288                 return -EOPNOTSUPP;
7289
7290         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7291         if (!msg)
7292                 return -ENOMEM;
7293
7294         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7295                              NL80211_CMD_GET_POWER_SAVE);
7296         if (!hdr) {
7297                 err = -ENOBUFS;
7298                 goto free_msg;
7299         }
7300
7301         if (wdev->ps)
7302                 ps_state = NL80211_PS_ENABLED;
7303         else
7304                 ps_state = NL80211_PS_DISABLED;
7305
7306         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7307                 goto nla_put_failure;
7308
7309         genlmsg_end(msg, hdr);
7310         return genlmsg_reply(msg, info);
7311
7312  nla_put_failure:
7313         err = -ENOBUFS;
7314  free_msg:
7315         nlmsg_free(msg);
7316         return err;
7317 }
7318
7319 static struct nla_policy
7320 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7321         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7322         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7323         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7324         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7325         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7326         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7327 };
7328
7329 static int nl80211_set_cqm_txe(struct genl_info *info,
7330                                u32 rate, u32 pkts, u32 intvl)
7331 {
7332         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7333         struct wireless_dev *wdev;
7334         struct net_device *dev = info->user_ptr[1];
7335
7336         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7337                 return -EINVAL;
7338
7339         wdev = dev->ieee80211_ptr;
7340
7341         if (!rdev->ops->set_cqm_txe_config)
7342                 return -EOPNOTSUPP;
7343
7344         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7345             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7346                 return -EOPNOTSUPP;
7347
7348         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7349 }
7350
7351 static int nl80211_set_cqm_rssi(struct genl_info *info,
7352                                 s32 threshold, u32 hysteresis)
7353 {
7354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7355         struct wireless_dev *wdev;
7356         struct net_device *dev = info->user_ptr[1];
7357
7358         if (threshold > 0)
7359                 return -EINVAL;
7360
7361         wdev = dev->ieee80211_ptr;
7362
7363         if (!rdev->ops->set_cqm_rssi_config)
7364                 return -EOPNOTSUPP;
7365
7366         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7367             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7368                 return -EOPNOTSUPP;
7369
7370         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7371 }
7372
7373 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7374 {
7375         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7376         struct nlattr *cqm;
7377         int err;
7378
7379         cqm = info->attrs[NL80211_ATTR_CQM];
7380         if (!cqm) {
7381                 err = -EINVAL;
7382                 goto out;
7383         }
7384
7385         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7386                                nl80211_attr_cqm_policy);
7387         if (err)
7388                 goto out;
7389
7390         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7391             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7392                 s32 threshold;
7393                 u32 hysteresis;
7394                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7395                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7396                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7397         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7398                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7399                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7400                 u32 rate, pkts, intvl;
7401                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7402                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7403                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7404                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7405         } else
7406                 err = -EINVAL;
7407
7408 out:
7409         return err;
7410 }
7411
7412 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7413 {
7414         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7415         struct net_device *dev = info->user_ptr[1];
7416         struct mesh_config cfg;
7417         struct mesh_setup setup;
7418         int err;
7419
7420         /* start with default */
7421         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7422         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7423
7424         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7425                 /* and parse parameters if given */
7426                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7427                 if (err)
7428                         return err;
7429         }
7430
7431         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7432             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7433                 return -EINVAL;
7434
7435         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7436         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7437
7438         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7439             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7440                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7441                         return -EINVAL;
7442
7443         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7444                 setup.beacon_interval =
7445                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7446                 if (setup.beacon_interval < 10 ||
7447                     setup.beacon_interval > 10000)
7448                         return -EINVAL;
7449         }
7450
7451         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7452                 setup.dtim_period =
7453                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7454                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7455                         return -EINVAL;
7456         }
7457
7458         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7459                 /* parse additional setup parameters if given */
7460                 err = nl80211_parse_mesh_setup(info, &setup);
7461                 if (err)
7462                         return err;
7463         }
7464
7465         if (setup.user_mpm)
7466                 cfg.auto_open_plinks = false;
7467
7468         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7469                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7470                 if (err)
7471                         return err;
7472         } else {
7473                 /* cfg80211_join_mesh() will sort it out */
7474                 setup.chandef.chan = NULL;
7475         }
7476
7477         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7478 }
7479
7480 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7481 {
7482         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7483         struct net_device *dev = info->user_ptr[1];
7484
7485         return cfg80211_leave_mesh(rdev, dev);
7486 }
7487
7488 #ifdef CONFIG_PM
7489 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7490                                         struct cfg80211_registered_device *rdev)
7491 {
7492         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7493         struct nlattr *nl_pats, *nl_pat;
7494         int i, pat_len;
7495
7496         if (!wowlan->n_patterns)
7497                 return 0;
7498
7499         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7500         if (!nl_pats)
7501                 return -ENOBUFS;
7502
7503         for (i = 0; i < wowlan->n_patterns; i++) {
7504                 nl_pat = nla_nest_start(msg, i + 1);
7505                 if (!nl_pat)
7506                         return -ENOBUFS;
7507                 pat_len = wowlan->patterns[i].pattern_len;
7508                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7509                             DIV_ROUND_UP(pat_len, 8),
7510                             wowlan->patterns[i].mask) ||
7511                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7512                             pat_len, wowlan->patterns[i].pattern) ||
7513                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7514                                 wowlan->patterns[i].pkt_offset))
7515                         return -ENOBUFS;
7516                 nla_nest_end(msg, nl_pat);
7517         }
7518         nla_nest_end(msg, nl_pats);
7519
7520         return 0;
7521 }
7522
7523 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7524                                    struct cfg80211_wowlan_tcp *tcp)
7525 {
7526         struct nlattr *nl_tcp;
7527
7528         if (!tcp)
7529                 return 0;
7530
7531         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7532         if (!nl_tcp)
7533                 return -ENOBUFS;
7534
7535         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7536             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7537             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7538             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7539             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7540             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7541                     tcp->payload_len, tcp->payload) ||
7542             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7543                         tcp->data_interval) ||
7544             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7545                     tcp->wake_len, tcp->wake_data) ||
7546             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7547                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7548                 return -ENOBUFS;
7549
7550         if (tcp->payload_seq.len &&
7551             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7552                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7553                 return -ENOBUFS;
7554
7555         if (tcp->payload_tok.len &&
7556             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7557                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7558                     &tcp->payload_tok))
7559                 return -ENOBUFS;
7560
7561         nla_nest_end(msg, nl_tcp);
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->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7578                 /* adjust size to have room for all the data */
7579                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7580                         rdev->wiphy.wowlan_config->tcp->payload_len +
7581                         rdev->wiphy.wowlan_config->tcp->wake_len +
7582                         rdev->wiphy.wowlan_config->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->wiphy.wowlan_config) {
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->wiphy.wowlan_config->any &&
7602                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7603                     (rdev->wiphy.wowlan_config->disconnect &&
7604                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7605                     (rdev->wiphy.wowlan_config->magic_pkt &&
7606                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7607                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7608                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7609                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7610                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7611                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7612                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7613                     (rdev->wiphy.wowlan_config->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,
7621                                             rdev->wiphy.wowlan_config->tcp))
7622                         goto nla_put_failure;
7623
7624                 nla_nest_end(msg, nl_wowlan);
7625         }
7626
7627         genlmsg_end(msg, hdr);
7628         return genlmsg_reply(msg, info);
7629
7630 nla_put_failure:
7631         nlmsg_free(msg);
7632         return -ENOBUFS;
7633 }
7634
7635 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7636                                     struct nlattr *attr,
7637                                     struct cfg80211_wowlan *trig)
7638 {
7639         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7640         struct cfg80211_wowlan_tcp *cfg;
7641         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7642         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7643         u32 size;
7644         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7645         int err, port;
7646
7647         if (!rdev->wiphy.wowlan.tcp)
7648                 return -EINVAL;
7649
7650         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7651                         nla_data(attr), nla_len(attr),
7652                         nl80211_wowlan_tcp_policy);
7653         if (err)
7654                 return err;
7655
7656         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7657             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7658             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7659             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7660             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7661             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7662             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7663             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7664                 return -EINVAL;
7665
7666         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7667         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7668                 return -EINVAL;
7669
7670         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7671                         rdev->wiphy.wowlan.tcp->data_interval_max ||
7672             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7673                 return -EINVAL;
7674
7675         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7676         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7677                 return -EINVAL;
7678
7679         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7680         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7681                 return -EINVAL;
7682
7683         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7684                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7685
7686                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7687                 tokens_size = tokln - sizeof(*tok);
7688
7689                 if (!tok->len || tokens_size % tok->len)
7690                         return -EINVAL;
7691                 if (!rdev->wiphy.wowlan.tcp->tok)
7692                         return -EINVAL;
7693                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7694                         return -EINVAL;
7695                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7696                         return -EINVAL;
7697                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7698                         return -EINVAL;
7699                 if (tok->offset + tok->len > data_size)
7700                         return -EINVAL;
7701         }
7702
7703         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7704                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7705                 if (!rdev->wiphy.wowlan.tcp->seq)
7706                         return -EINVAL;
7707                 if (seq->len == 0 || seq->len > 4)
7708                         return -EINVAL;
7709                 if (seq->len + seq->offset > data_size)
7710                         return -EINVAL;
7711         }
7712
7713         size = sizeof(*cfg);
7714         size += data_size;
7715         size += wake_size + wake_mask_size;
7716         size += tokens_size;
7717
7718         cfg = kzalloc(size, GFP_KERNEL);
7719         if (!cfg)
7720                 return -ENOMEM;
7721         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7722         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7723         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7724                ETH_ALEN);
7725         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7726                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7727         else
7728                 port = 0;
7729 #ifdef CONFIG_INET
7730         /* allocate a socket and port for it and use it */
7731         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7732                             IPPROTO_TCP, &cfg->sock, 1);
7733         if (err) {
7734                 kfree(cfg);
7735                 return err;
7736         }
7737         if (inet_csk_get_port(cfg->sock->sk, port)) {
7738                 sock_release(cfg->sock);
7739                 kfree(cfg);
7740                 return -EADDRINUSE;
7741         }
7742         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7743 #else
7744         if (!port) {
7745                 kfree(cfg);
7746                 return -EINVAL;
7747         }
7748         cfg->src_port = port;
7749 #endif
7750
7751         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7752         cfg->payload_len = data_size;
7753         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7754         memcpy((void *)cfg->payload,
7755                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7756                data_size);
7757         if (seq)
7758                 cfg->payload_seq = *seq;
7759         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7760         cfg->wake_len = wake_size;
7761         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7762         memcpy((void *)cfg->wake_data,
7763                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7764                wake_size);
7765         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7766                          data_size + wake_size;
7767         memcpy((void *)cfg->wake_mask,
7768                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7769                wake_mask_size);
7770         if (tok) {
7771                 cfg->tokens_size = tokens_size;
7772                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7773         }
7774
7775         trig->tcp = cfg;
7776
7777         return 0;
7778 }
7779
7780 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7781 {
7782         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7783         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7784         struct cfg80211_wowlan new_triggers = {};
7785         struct cfg80211_wowlan *ntrig;
7786         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7787         int err, i;
7788         bool prev_enabled = rdev->wiphy.wowlan_config;
7789
7790         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7791             !rdev->wiphy.wowlan.tcp)
7792                 return -EOPNOTSUPP;
7793
7794         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7795                 cfg80211_rdev_free_wowlan(rdev);
7796                 rdev->wiphy.wowlan_config = NULL;
7797                 goto set_wakeup;
7798         }
7799
7800         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7801                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7802                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7803                         nl80211_wowlan_policy);
7804         if (err)
7805                 return err;
7806
7807         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7808                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7809                         return -EINVAL;
7810                 new_triggers.any = true;
7811         }
7812
7813         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7814                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7815                         return -EINVAL;
7816                 new_triggers.disconnect = true;
7817         }
7818
7819         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7820                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7821                         return -EINVAL;
7822                 new_triggers.magic_pkt = true;
7823         }
7824
7825         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7826                 return -EINVAL;
7827
7828         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7829                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7830                         return -EINVAL;
7831                 new_triggers.gtk_rekey_failure = true;
7832         }
7833
7834         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7835                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7836                         return -EINVAL;
7837                 new_triggers.eap_identity_req = true;
7838         }
7839
7840         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7841                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7842                         return -EINVAL;
7843                 new_triggers.four_way_handshake = true;
7844         }
7845
7846         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7847                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7848                         return -EINVAL;
7849                 new_triggers.rfkill_release = true;
7850         }
7851
7852         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7853                 struct nlattr *pat;
7854                 int n_patterns = 0;
7855                 int rem, pat_len, mask_len, pkt_offset;
7856                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7857
7858                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7859                                     rem)
7860                         n_patterns++;
7861                 if (n_patterns > wowlan->n_patterns)
7862                         return -EINVAL;
7863
7864                 new_triggers.patterns = kcalloc(n_patterns,
7865                                                 sizeof(new_triggers.patterns[0]),
7866                                                 GFP_KERNEL);
7867                 if (!new_triggers.patterns)
7868                         return -ENOMEM;
7869
7870                 new_triggers.n_patterns = n_patterns;
7871                 i = 0;
7872
7873                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7874                                     rem) {
7875                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7876                                   nla_data(pat), nla_len(pat), NULL);
7877                         err = -EINVAL;
7878                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7879                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7880                                 goto error;
7881                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7882                         mask_len = DIV_ROUND_UP(pat_len, 8);
7883                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7884                             mask_len)
7885                                 goto error;
7886                         if (pat_len > wowlan->pattern_max_len ||
7887                             pat_len < wowlan->pattern_min_len)
7888                                 goto error;
7889
7890                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7891                                 pkt_offset = 0;
7892                         else
7893                                 pkt_offset = nla_get_u32(
7894                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7895                         if (pkt_offset > wowlan->max_pkt_offset)
7896                                 goto error;
7897                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7898
7899                         new_triggers.patterns[i].mask =
7900                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7901                         if (!new_triggers.patterns[i].mask) {
7902                                 err = -ENOMEM;
7903                                 goto error;
7904                         }
7905                         new_triggers.patterns[i].pattern =
7906                                 new_triggers.patterns[i].mask + mask_len;
7907                         memcpy(new_triggers.patterns[i].mask,
7908                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7909                                mask_len);
7910                         new_triggers.patterns[i].pattern_len = pat_len;
7911                         memcpy(new_triggers.patterns[i].pattern,
7912                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7913                                pat_len);
7914                         i++;
7915                 }
7916         }
7917
7918         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7919                 err = nl80211_parse_wowlan_tcp(
7920                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7921                         &new_triggers);
7922                 if (err)
7923                         goto error;
7924         }
7925
7926         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7927         if (!ntrig) {
7928                 err = -ENOMEM;
7929                 goto error;
7930         }
7931         cfg80211_rdev_free_wowlan(rdev);
7932         rdev->wiphy.wowlan_config = ntrig;
7933
7934  set_wakeup:
7935         if (rdev->ops->set_wakeup &&
7936             prev_enabled != !!rdev->wiphy.wowlan_config)
7937                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
7938
7939         return 0;
7940  error:
7941         for (i = 0; i < new_triggers.n_patterns; i++)
7942                 kfree(new_triggers.patterns[i].mask);
7943         kfree(new_triggers.patterns);
7944         if (new_triggers.tcp && new_triggers.tcp->sock)
7945                 sock_release(new_triggers.tcp->sock);
7946         kfree(new_triggers.tcp);
7947         return err;
7948 }
7949 #endif
7950
7951 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7952 {
7953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7954         struct net_device *dev = info->user_ptr[1];
7955         struct wireless_dev *wdev = dev->ieee80211_ptr;
7956         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7957         struct cfg80211_gtk_rekey_data rekey_data;
7958         int err;
7959
7960         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7961                 return -EINVAL;
7962
7963         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7964                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7965                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7966                         nl80211_rekey_policy);
7967         if (err)
7968                 return err;
7969
7970         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7971                 return -ERANGE;
7972         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7973                 return -ERANGE;
7974         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7975                 return -ERANGE;
7976
7977         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7978                NL80211_KEK_LEN);
7979         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7980                NL80211_KCK_LEN);
7981         memcpy(rekey_data.replay_ctr,
7982                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7983                NL80211_REPLAY_CTR_LEN);
7984
7985         wdev_lock(wdev);
7986         if (!wdev->current_bss) {
7987                 err = -ENOTCONN;
7988                 goto out;
7989         }
7990
7991         if (!rdev->ops->set_rekey_data) {
7992                 err = -EOPNOTSUPP;
7993                 goto out;
7994         }
7995
7996         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7997  out:
7998         wdev_unlock(wdev);
7999         return err;
8000 }
8001
8002 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8003                                              struct genl_info *info)
8004 {
8005         struct net_device *dev = info->user_ptr[1];
8006         struct wireless_dev *wdev = dev->ieee80211_ptr;
8007
8008         if (wdev->iftype != NL80211_IFTYPE_AP &&
8009             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8010                 return -EINVAL;
8011
8012         if (wdev->ap_unexpected_nlportid)
8013                 return -EBUSY;
8014
8015         wdev->ap_unexpected_nlportid = info->snd_portid;
8016         return 0;
8017 }
8018
8019 static int nl80211_probe_client(struct sk_buff *skb,
8020                                 struct genl_info *info)
8021 {
8022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8023         struct net_device *dev = info->user_ptr[1];
8024         struct wireless_dev *wdev = dev->ieee80211_ptr;
8025         struct sk_buff *msg;
8026         void *hdr;
8027         const u8 *addr;
8028         u64 cookie;
8029         int err;
8030
8031         if (wdev->iftype != NL80211_IFTYPE_AP &&
8032             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8033                 return -EOPNOTSUPP;
8034
8035         if (!info->attrs[NL80211_ATTR_MAC])
8036                 return -EINVAL;
8037
8038         if (!rdev->ops->probe_client)
8039                 return -EOPNOTSUPP;
8040
8041         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8042         if (!msg)
8043                 return -ENOMEM;
8044
8045         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8046                              NL80211_CMD_PROBE_CLIENT);
8047
8048         if (IS_ERR(hdr)) {
8049                 err = PTR_ERR(hdr);
8050                 goto free_msg;
8051         }
8052
8053         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8054
8055         err = rdev_probe_client(rdev, dev, addr, &cookie);
8056         if (err)
8057                 goto free_msg;
8058
8059         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8060                 goto nla_put_failure;
8061
8062         genlmsg_end(msg, hdr);
8063
8064         return genlmsg_reply(msg, info);
8065
8066  nla_put_failure:
8067         err = -ENOBUFS;
8068  free_msg:
8069         nlmsg_free(msg);
8070         return err;
8071 }
8072
8073 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8074 {
8075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8076         struct cfg80211_beacon_registration *reg, *nreg;
8077         int rv;
8078
8079         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8080                 return -EOPNOTSUPP;
8081
8082         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8083         if (!nreg)
8084                 return -ENOMEM;
8085
8086         /* First, check if already registered. */
8087         spin_lock_bh(&rdev->beacon_registrations_lock);
8088         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8089                 if (reg->nlportid == info->snd_portid) {
8090                         rv = -EALREADY;
8091                         goto out_err;
8092                 }
8093         }
8094         /* Add it to the list */
8095         nreg->nlportid = info->snd_portid;
8096         list_add(&nreg->list, &rdev->beacon_registrations);
8097
8098         spin_unlock_bh(&rdev->beacon_registrations_lock);
8099
8100         return 0;
8101 out_err:
8102         spin_unlock_bh(&rdev->beacon_registrations_lock);
8103         kfree(nreg);
8104         return rv;
8105 }
8106
8107 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8108 {
8109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8110         struct wireless_dev *wdev = info->user_ptr[1];
8111         int err;
8112
8113         if (!rdev->ops->start_p2p_device)
8114                 return -EOPNOTSUPP;
8115
8116         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8117                 return -EOPNOTSUPP;
8118
8119         if (wdev->p2p_started)
8120                 return 0;
8121
8122         err = cfg80211_can_add_interface(rdev, wdev->iftype);
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         rdev->opencount++;
8132
8133         return 0;
8134 }
8135
8136 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8137 {
8138         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8139         struct wireless_dev *wdev = info->user_ptr[1];
8140
8141         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8142                 return -EOPNOTSUPP;
8143
8144         if (!rdev->ops->stop_p2p_device)
8145                 return -EOPNOTSUPP;
8146
8147         cfg80211_stop_p2p_device(rdev, wdev);
8148
8149         return 0;
8150 }
8151
8152 static int nl80211_get_protocol_features(struct sk_buff *skb,
8153                                          struct genl_info *info)
8154 {
8155         void *hdr;
8156         struct sk_buff *msg;
8157
8158         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8159         if (!msg)
8160                 return -ENOMEM;
8161
8162         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8163                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8164         if (!hdr)
8165                 goto nla_put_failure;
8166
8167         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8168                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8169                 goto nla_put_failure;
8170
8171         genlmsg_end(msg, hdr);
8172         return genlmsg_reply(msg, info);
8173
8174  nla_put_failure:
8175         kfree_skb(msg);
8176         return -ENOBUFS;
8177 }
8178
8179 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8180 {
8181         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8182         struct cfg80211_update_ft_ies_params ft_params;
8183         struct net_device *dev = info->user_ptr[1];
8184
8185         if (!rdev->ops->update_ft_ies)
8186                 return -EOPNOTSUPP;
8187
8188         if (!info->attrs[NL80211_ATTR_MDID] ||
8189             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8190                 return -EINVAL;
8191
8192         memset(&ft_params, 0, sizeof(ft_params));
8193         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8194         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8195         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8196
8197         return rdev_update_ft_ies(rdev, dev, &ft_params);
8198 }
8199
8200 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8201                                        struct genl_info *info)
8202 {
8203         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8204         struct wireless_dev *wdev = info->user_ptr[1];
8205         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8206         u16 duration;
8207         int ret;
8208
8209         if (!rdev->ops->crit_proto_start)
8210                 return -EOPNOTSUPP;
8211
8212         if (WARN_ON(!rdev->ops->crit_proto_stop))
8213                 return -EINVAL;
8214
8215         if (rdev->crit_proto_nlportid)
8216                 return -EBUSY;
8217
8218         /* determine protocol if provided */
8219         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8220                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8221
8222         if (proto >= NUM_NL80211_CRIT_PROTO)
8223                 return -EINVAL;
8224
8225         /* timeout must be provided */
8226         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8227                 return -EINVAL;
8228
8229         duration =
8230                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8231
8232         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8233                 return -ERANGE;
8234
8235         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8236         if (!ret)
8237                 rdev->crit_proto_nlportid = info->snd_portid;
8238
8239         return ret;
8240 }
8241
8242 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8243                                       struct genl_info *info)
8244 {
8245         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8246         struct wireless_dev *wdev = info->user_ptr[1];
8247
8248         if (!rdev->ops->crit_proto_stop)
8249                 return -EOPNOTSUPP;
8250
8251         if (rdev->crit_proto_nlportid) {
8252                 rdev->crit_proto_nlportid = 0;
8253                 rdev_crit_proto_stop(rdev, wdev);
8254         }
8255         return 0;
8256 }
8257
8258 #define NL80211_FLAG_NEED_WIPHY         0x01
8259 #define NL80211_FLAG_NEED_NETDEV        0x02
8260 #define NL80211_FLAG_NEED_RTNL          0x04
8261 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8262 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8263                                          NL80211_FLAG_CHECK_NETDEV_UP)
8264 #define NL80211_FLAG_NEED_WDEV          0x10
8265 /* If a netdev is associated, it must be UP, P2P must be started */
8266 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8267                                          NL80211_FLAG_CHECK_NETDEV_UP)
8268
8269 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8270                             struct genl_info *info)
8271 {
8272         struct cfg80211_registered_device *rdev;
8273         struct wireless_dev *wdev;
8274         struct net_device *dev;
8275         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8276
8277         if (rtnl)
8278                 rtnl_lock();
8279
8280         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8281                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8282                 if (IS_ERR(rdev)) {
8283                         if (rtnl)
8284                                 rtnl_unlock();
8285                         return PTR_ERR(rdev);
8286                 }
8287                 info->user_ptr[0] = rdev;
8288         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8289                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8290                 ASSERT_RTNL();
8291
8292                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8293                                                   info->attrs);
8294                 if (IS_ERR(wdev)) {
8295                         if (rtnl)
8296                                 rtnl_unlock();
8297                         return PTR_ERR(wdev);
8298                 }
8299
8300                 dev = wdev->netdev;
8301                 rdev = wiphy_to_dev(wdev->wiphy);
8302
8303                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8304                         if (!dev) {
8305                                 if (rtnl)
8306                                         rtnl_unlock();
8307                                 return -EINVAL;
8308                         }
8309
8310                         info->user_ptr[1] = dev;
8311                 } else {
8312                         info->user_ptr[1] = wdev;
8313                 }
8314
8315                 if (dev) {
8316                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8317                             !netif_running(dev)) {
8318                                 if (rtnl)
8319                                         rtnl_unlock();
8320                                 return -ENETDOWN;
8321                         }
8322
8323                         dev_hold(dev);
8324                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8325                         if (!wdev->p2p_started) {
8326                                 if (rtnl)
8327                                         rtnl_unlock();
8328                                 return -ENETDOWN;
8329                         }
8330                 }
8331
8332                 info->user_ptr[0] = rdev;
8333         }
8334
8335         return 0;
8336 }
8337
8338 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8339                               struct genl_info *info)
8340 {
8341         if (info->user_ptr[1]) {
8342                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8343                         struct wireless_dev *wdev = info->user_ptr[1];
8344
8345                         if (wdev->netdev)
8346                                 dev_put(wdev->netdev);
8347                 } else {
8348                         dev_put(info->user_ptr[1]);
8349                 }
8350         }
8351         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8352                 rtnl_unlock();
8353 }
8354
8355 static struct genl_ops nl80211_ops[] = {
8356         {
8357                 .cmd = NL80211_CMD_GET_WIPHY,
8358                 .doit = nl80211_get_wiphy,
8359                 .dumpit = nl80211_dump_wiphy,
8360                 .policy = nl80211_policy,
8361                 /* can be retrieved by unprivileged users */
8362                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8363                                   NL80211_FLAG_NEED_RTNL,
8364         },
8365         {
8366                 .cmd = NL80211_CMD_SET_WIPHY,
8367                 .doit = nl80211_set_wiphy,
8368                 .policy = nl80211_policy,
8369                 .flags = GENL_ADMIN_PERM,
8370                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8371         },
8372         {
8373                 .cmd = NL80211_CMD_GET_INTERFACE,
8374                 .doit = nl80211_get_interface,
8375                 .dumpit = nl80211_dump_interface,
8376                 .policy = nl80211_policy,
8377                 /* can be retrieved by unprivileged users */
8378                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8379                                   NL80211_FLAG_NEED_RTNL,
8380         },
8381         {
8382                 .cmd = NL80211_CMD_SET_INTERFACE,
8383                 .doit = nl80211_set_interface,
8384                 .policy = nl80211_policy,
8385                 .flags = GENL_ADMIN_PERM,
8386                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8387                                   NL80211_FLAG_NEED_RTNL,
8388         },
8389         {
8390                 .cmd = NL80211_CMD_NEW_INTERFACE,
8391                 .doit = nl80211_new_interface,
8392                 .policy = nl80211_policy,
8393                 .flags = GENL_ADMIN_PERM,
8394                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8395                                   NL80211_FLAG_NEED_RTNL,
8396         },
8397         {
8398                 .cmd = NL80211_CMD_DEL_INTERFACE,
8399                 .doit = nl80211_del_interface,
8400                 .policy = nl80211_policy,
8401                 .flags = GENL_ADMIN_PERM,
8402                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8403                                   NL80211_FLAG_NEED_RTNL,
8404         },
8405         {
8406                 .cmd = NL80211_CMD_GET_KEY,
8407                 .doit = nl80211_get_key,
8408                 .policy = nl80211_policy,
8409                 .flags = GENL_ADMIN_PERM,
8410                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8411                                   NL80211_FLAG_NEED_RTNL,
8412         },
8413         {
8414                 .cmd = NL80211_CMD_SET_KEY,
8415                 .doit = nl80211_set_key,
8416                 .policy = nl80211_policy,
8417                 .flags = GENL_ADMIN_PERM,
8418                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8419                                   NL80211_FLAG_NEED_RTNL,
8420         },
8421         {
8422                 .cmd = NL80211_CMD_NEW_KEY,
8423                 .doit = nl80211_new_key,
8424                 .policy = nl80211_policy,
8425                 .flags = GENL_ADMIN_PERM,
8426                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8427                                   NL80211_FLAG_NEED_RTNL,
8428         },
8429         {
8430                 .cmd = NL80211_CMD_DEL_KEY,
8431                 .doit = nl80211_del_key,
8432                 .policy = nl80211_policy,
8433                 .flags = GENL_ADMIN_PERM,
8434                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8435                                   NL80211_FLAG_NEED_RTNL,
8436         },
8437         {
8438                 .cmd = NL80211_CMD_SET_BEACON,
8439                 .policy = nl80211_policy,
8440                 .flags = GENL_ADMIN_PERM,
8441                 .doit = nl80211_set_beacon,
8442                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8443                                   NL80211_FLAG_NEED_RTNL,
8444         },
8445         {
8446                 .cmd = NL80211_CMD_START_AP,
8447                 .policy = nl80211_policy,
8448                 .flags = GENL_ADMIN_PERM,
8449                 .doit = nl80211_start_ap,
8450                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8451                                   NL80211_FLAG_NEED_RTNL,
8452         },
8453         {
8454                 .cmd = NL80211_CMD_STOP_AP,
8455                 .policy = nl80211_policy,
8456                 .flags = GENL_ADMIN_PERM,
8457                 .doit = nl80211_stop_ap,
8458                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8459                                   NL80211_FLAG_NEED_RTNL,
8460         },
8461         {
8462                 .cmd = NL80211_CMD_GET_STATION,
8463                 .doit = nl80211_get_station,
8464                 .dumpit = nl80211_dump_station,
8465                 .policy = nl80211_policy,
8466                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8467                                   NL80211_FLAG_NEED_RTNL,
8468         },
8469         {
8470                 .cmd = NL80211_CMD_SET_STATION,
8471                 .doit = nl80211_set_station,
8472                 .policy = nl80211_policy,
8473                 .flags = GENL_ADMIN_PERM,
8474                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8475                                   NL80211_FLAG_NEED_RTNL,
8476         },
8477         {
8478                 .cmd = NL80211_CMD_NEW_STATION,
8479                 .doit = nl80211_new_station,
8480                 .policy = nl80211_policy,
8481                 .flags = GENL_ADMIN_PERM,
8482                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8483                                   NL80211_FLAG_NEED_RTNL,
8484         },
8485         {
8486                 .cmd = NL80211_CMD_DEL_STATION,
8487                 .doit = nl80211_del_station,
8488                 .policy = nl80211_policy,
8489                 .flags = GENL_ADMIN_PERM,
8490                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8491                                   NL80211_FLAG_NEED_RTNL,
8492         },
8493         {
8494                 .cmd = NL80211_CMD_GET_MPATH,
8495                 .doit = nl80211_get_mpath,
8496                 .dumpit = nl80211_dump_mpath,
8497                 .policy = nl80211_policy,
8498                 .flags = GENL_ADMIN_PERM,
8499                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8500                                   NL80211_FLAG_NEED_RTNL,
8501         },
8502         {
8503                 .cmd = NL80211_CMD_SET_MPATH,
8504                 .doit = nl80211_set_mpath,
8505                 .policy = nl80211_policy,
8506                 .flags = GENL_ADMIN_PERM,
8507                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8508                                   NL80211_FLAG_NEED_RTNL,
8509         },
8510         {
8511                 .cmd = NL80211_CMD_NEW_MPATH,
8512                 .doit = nl80211_new_mpath,
8513                 .policy = nl80211_policy,
8514                 .flags = GENL_ADMIN_PERM,
8515                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8516                                   NL80211_FLAG_NEED_RTNL,
8517         },
8518         {
8519                 .cmd = NL80211_CMD_DEL_MPATH,
8520                 .doit = nl80211_del_mpath,
8521                 .policy = nl80211_policy,
8522                 .flags = GENL_ADMIN_PERM,
8523                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8524                                   NL80211_FLAG_NEED_RTNL,
8525         },
8526         {
8527                 .cmd = NL80211_CMD_SET_BSS,
8528                 .doit = nl80211_set_bss,
8529                 .policy = nl80211_policy,
8530                 .flags = GENL_ADMIN_PERM,
8531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8532                                   NL80211_FLAG_NEED_RTNL,
8533         },
8534         {
8535                 .cmd = NL80211_CMD_GET_REG,
8536                 .doit = nl80211_get_reg,
8537                 .policy = nl80211_policy,
8538                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8539                 /* can be retrieved by unprivileged users */
8540         },
8541         {
8542                 .cmd = NL80211_CMD_SET_REG,
8543                 .doit = nl80211_set_reg,
8544                 .policy = nl80211_policy,
8545                 .flags = GENL_ADMIN_PERM,
8546                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8547         },
8548         {
8549                 .cmd = NL80211_CMD_REQ_SET_REG,
8550                 .doit = nl80211_req_set_reg,
8551                 .policy = nl80211_policy,
8552                 .flags = GENL_ADMIN_PERM,
8553         },
8554         {
8555                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8556                 .doit = nl80211_get_mesh_config,
8557                 .policy = nl80211_policy,
8558                 /* can be retrieved by unprivileged users */
8559                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8560                                   NL80211_FLAG_NEED_RTNL,
8561         },
8562         {
8563                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8564                 .doit = nl80211_update_mesh_config,
8565                 .policy = nl80211_policy,
8566                 .flags = GENL_ADMIN_PERM,
8567                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8568                                   NL80211_FLAG_NEED_RTNL,
8569         },
8570         {
8571                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8572                 .doit = nl80211_trigger_scan,
8573                 .policy = nl80211_policy,
8574                 .flags = GENL_ADMIN_PERM,
8575                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8576                                   NL80211_FLAG_NEED_RTNL,
8577         },
8578         {
8579                 .cmd = NL80211_CMD_GET_SCAN,
8580                 .policy = nl80211_policy,
8581                 .dumpit = nl80211_dump_scan,
8582         },
8583         {
8584                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8585                 .doit = nl80211_start_sched_scan,
8586                 .policy = nl80211_policy,
8587                 .flags = GENL_ADMIN_PERM,
8588                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8589                                   NL80211_FLAG_NEED_RTNL,
8590         },
8591         {
8592                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8593                 .doit = nl80211_stop_sched_scan,
8594                 .policy = nl80211_policy,
8595                 .flags = GENL_ADMIN_PERM,
8596                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8597                                   NL80211_FLAG_NEED_RTNL,
8598         },
8599         {
8600                 .cmd = NL80211_CMD_AUTHENTICATE,
8601                 .doit = nl80211_authenticate,
8602                 .policy = nl80211_policy,
8603                 .flags = GENL_ADMIN_PERM,
8604                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8605                                   NL80211_FLAG_NEED_RTNL,
8606         },
8607         {
8608                 .cmd = NL80211_CMD_ASSOCIATE,
8609                 .doit = nl80211_associate,
8610                 .policy = nl80211_policy,
8611                 .flags = GENL_ADMIN_PERM,
8612                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8613                                   NL80211_FLAG_NEED_RTNL,
8614         },
8615         {
8616                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8617                 .doit = nl80211_deauthenticate,
8618                 .policy = nl80211_policy,
8619                 .flags = GENL_ADMIN_PERM,
8620                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8621                                   NL80211_FLAG_NEED_RTNL,
8622         },
8623         {
8624                 .cmd = NL80211_CMD_DISASSOCIATE,
8625                 .doit = nl80211_disassociate,
8626                 .policy = nl80211_policy,
8627                 .flags = GENL_ADMIN_PERM,
8628                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8629                                   NL80211_FLAG_NEED_RTNL,
8630         },
8631         {
8632                 .cmd = NL80211_CMD_JOIN_IBSS,
8633                 .doit = nl80211_join_ibss,
8634                 .policy = nl80211_policy,
8635                 .flags = GENL_ADMIN_PERM,
8636                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8637                                   NL80211_FLAG_NEED_RTNL,
8638         },
8639         {
8640                 .cmd = NL80211_CMD_LEAVE_IBSS,
8641                 .doit = nl80211_leave_ibss,
8642                 .policy = nl80211_policy,
8643                 .flags = GENL_ADMIN_PERM,
8644                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8645                                   NL80211_FLAG_NEED_RTNL,
8646         },
8647 #ifdef CONFIG_NL80211_TESTMODE
8648         {
8649                 .cmd = NL80211_CMD_TESTMODE,
8650                 .doit = nl80211_testmode_do,
8651                 .dumpit = nl80211_testmode_dump,
8652                 .policy = nl80211_policy,
8653                 .flags = GENL_ADMIN_PERM,
8654                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8655                                   NL80211_FLAG_NEED_RTNL,
8656         },
8657 #endif
8658         {
8659                 .cmd = NL80211_CMD_CONNECT,
8660                 .doit = nl80211_connect,
8661                 .policy = nl80211_policy,
8662                 .flags = GENL_ADMIN_PERM,
8663                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8664                                   NL80211_FLAG_NEED_RTNL,
8665         },
8666         {
8667                 .cmd = NL80211_CMD_DISCONNECT,
8668                 .doit = nl80211_disconnect,
8669                 .policy = nl80211_policy,
8670                 .flags = GENL_ADMIN_PERM,
8671                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8672                                   NL80211_FLAG_NEED_RTNL,
8673         },
8674         {
8675                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8676                 .doit = nl80211_wiphy_netns,
8677                 .policy = nl80211_policy,
8678                 .flags = GENL_ADMIN_PERM,
8679                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8680                                   NL80211_FLAG_NEED_RTNL,
8681         },
8682         {
8683                 .cmd = NL80211_CMD_GET_SURVEY,
8684                 .policy = nl80211_policy,
8685                 .dumpit = nl80211_dump_survey,
8686         },
8687         {
8688                 .cmd = NL80211_CMD_SET_PMKSA,
8689                 .doit = nl80211_setdel_pmksa,
8690                 .policy = nl80211_policy,
8691                 .flags = GENL_ADMIN_PERM,
8692                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8693                                   NL80211_FLAG_NEED_RTNL,
8694         },
8695         {
8696                 .cmd = NL80211_CMD_DEL_PMKSA,
8697                 .doit = nl80211_setdel_pmksa,
8698                 .policy = nl80211_policy,
8699                 .flags = GENL_ADMIN_PERM,
8700                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8701                                   NL80211_FLAG_NEED_RTNL,
8702         },
8703         {
8704                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8705                 .doit = nl80211_flush_pmksa,
8706                 .policy = nl80211_policy,
8707                 .flags = GENL_ADMIN_PERM,
8708                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8709                                   NL80211_FLAG_NEED_RTNL,
8710         },
8711         {
8712                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8713                 .doit = nl80211_remain_on_channel,
8714                 .policy = nl80211_policy,
8715                 .flags = GENL_ADMIN_PERM,
8716                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8717                                   NL80211_FLAG_NEED_RTNL,
8718         },
8719         {
8720                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8721                 .doit = nl80211_cancel_remain_on_channel,
8722                 .policy = nl80211_policy,
8723                 .flags = GENL_ADMIN_PERM,
8724                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8725                                   NL80211_FLAG_NEED_RTNL,
8726         },
8727         {
8728                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8729                 .doit = nl80211_set_tx_bitrate_mask,
8730                 .policy = nl80211_policy,
8731                 .flags = GENL_ADMIN_PERM,
8732                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8733                                   NL80211_FLAG_NEED_RTNL,
8734         },
8735         {
8736                 .cmd = NL80211_CMD_REGISTER_FRAME,
8737                 .doit = nl80211_register_mgmt,
8738                 .policy = nl80211_policy,
8739                 .flags = GENL_ADMIN_PERM,
8740                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8741                                   NL80211_FLAG_NEED_RTNL,
8742         },
8743         {
8744                 .cmd = NL80211_CMD_FRAME,
8745                 .doit = nl80211_tx_mgmt,
8746                 .policy = nl80211_policy,
8747                 .flags = GENL_ADMIN_PERM,
8748                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8749                                   NL80211_FLAG_NEED_RTNL,
8750         },
8751         {
8752                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8753                 .doit = nl80211_tx_mgmt_cancel_wait,
8754                 .policy = nl80211_policy,
8755                 .flags = GENL_ADMIN_PERM,
8756                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8757                                   NL80211_FLAG_NEED_RTNL,
8758         },
8759         {
8760                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8761                 .doit = nl80211_set_power_save,
8762                 .policy = nl80211_policy,
8763                 .flags = GENL_ADMIN_PERM,
8764                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8765                                   NL80211_FLAG_NEED_RTNL,
8766         },
8767         {
8768                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8769                 .doit = nl80211_get_power_save,
8770                 .policy = nl80211_policy,
8771                 /* can be retrieved by unprivileged users */
8772                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8773                                   NL80211_FLAG_NEED_RTNL,
8774         },
8775         {
8776                 .cmd = NL80211_CMD_SET_CQM,
8777                 .doit = nl80211_set_cqm,
8778                 .policy = nl80211_policy,
8779                 .flags = GENL_ADMIN_PERM,
8780                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8781                                   NL80211_FLAG_NEED_RTNL,
8782         },
8783         {
8784                 .cmd = NL80211_CMD_SET_CHANNEL,
8785                 .doit = nl80211_set_channel,
8786                 .policy = nl80211_policy,
8787                 .flags = GENL_ADMIN_PERM,
8788                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8789                                   NL80211_FLAG_NEED_RTNL,
8790         },
8791         {
8792                 .cmd = NL80211_CMD_SET_WDS_PEER,
8793                 .doit = nl80211_set_wds_peer,
8794                 .policy = nl80211_policy,
8795                 .flags = GENL_ADMIN_PERM,
8796                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8797                                   NL80211_FLAG_NEED_RTNL,
8798         },
8799         {
8800                 .cmd = NL80211_CMD_JOIN_MESH,
8801                 .doit = nl80211_join_mesh,
8802                 .policy = nl80211_policy,
8803                 .flags = GENL_ADMIN_PERM,
8804                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8805                                   NL80211_FLAG_NEED_RTNL,
8806         },
8807         {
8808                 .cmd = NL80211_CMD_LEAVE_MESH,
8809                 .doit = nl80211_leave_mesh,
8810                 .policy = nl80211_policy,
8811                 .flags = GENL_ADMIN_PERM,
8812                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8813                                   NL80211_FLAG_NEED_RTNL,
8814         },
8815 #ifdef CONFIG_PM
8816         {
8817                 .cmd = NL80211_CMD_GET_WOWLAN,
8818                 .doit = nl80211_get_wowlan,
8819                 .policy = nl80211_policy,
8820                 /* can be retrieved by unprivileged users */
8821                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8822                                   NL80211_FLAG_NEED_RTNL,
8823         },
8824         {
8825                 .cmd = NL80211_CMD_SET_WOWLAN,
8826                 .doit = nl80211_set_wowlan,
8827                 .policy = nl80211_policy,
8828                 .flags = GENL_ADMIN_PERM,
8829                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8830                                   NL80211_FLAG_NEED_RTNL,
8831         },
8832 #endif
8833         {
8834                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8835                 .doit = nl80211_set_rekey_data,
8836                 .policy = nl80211_policy,
8837                 .flags = GENL_ADMIN_PERM,
8838                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8839                                   NL80211_FLAG_NEED_RTNL,
8840         },
8841         {
8842                 .cmd = NL80211_CMD_TDLS_MGMT,
8843                 .doit = nl80211_tdls_mgmt,
8844                 .policy = nl80211_policy,
8845                 .flags = GENL_ADMIN_PERM,
8846                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8847                                   NL80211_FLAG_NEED_RTNL,
8848         },
8849         {
8850                 .cmd = NL80211_CMD_TDLS_OPER,
8851                 .doit = nl80211_tdls_oper,
8852                 .policy = nl80211_policy,
8853                 .flags = GENL_ADMIN_PERM,
8854                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8855                                   NL80211_FLAG_NEED_RTNL,
8856         },
8857         {
8858                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8859                 .doit = nl80211_register_unexpected_frame,
8860                 .policy = nl80211_policy,
8861                 .flags = GENL_ADMIN_PERM,
8862                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8863                                   NL80211_FLAG_NEED_RTNL,
8864         },
8865         {
8866                 .cmd = NL80211_CMD_PROBE_CLIENT,
8867                 .doit = nl80211_probe_client,
8868                 .policy = nl80211_policy,
8869                 .flags = GENL_ADMIN_PERM,
8870                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8871                                   NL80211_FLAG_NEED_RTNL,
8872         },
8873         {
8874                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8875                 .doit = nl80211_register_beacons,
8876                 .policy = nl80211_policy,
8877                 .flags = GENL_ADMIN_PERM,
8878                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8879                                   NL80211_FLAG_NEED_RTNL,
8880         },
8881         {
8882                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8883                 .doit = nl80211_set_noack_map,
8884                 .policy = nl80211_policy,
8885                 .flags = GENL_ADMIN_PERM,
8886                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8887                                   NL80211_FLAG_NEED_RTNL,
8888         },
8889         {
8890                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8891                 .doit = nl80211_start_p2p_device,
8892                 .policy = nl80211_policy,
8893                 .flags = GENL_ADMIN_PERM,
8894                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8895                                   NL80211_FLAG_NEED_RTNL,
8896         },
8897         {
8898                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8899                 .doit = nl80211_stop_p2p_device,
8900                 .policy = nl80211_policy,
8901                 .flags = GENL_ADMIN_PERM,
8902                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8903                                   NL80211_FLAG_NEED_RTNL,
8904         },
8905         {
8906                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8907                 .doit = nl80211_set_mcast_rate,
8908                 .policy = nl80211_policy,
8909                 .flags = GENL_ADMIN_PERM,
8910                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8911                                   NL80211_FLAG_NEED_RTNL,
8912         },
8913         {
8914                 .cmd = NL80211_CMD_SET_MAC_ACL,
8915                 .doit = nl80211_set_mac_acl,
8916                 .policy = nl80211_policy,
8917                 .flags = GENL_ADMIN_PERM,
8918                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8919                                   NL80211_FLAG_NEED_RTNL,
8920         },
8921         {
8922                 .cmd = NL80211_CMD_RADAR_DETECT,
8923                 .doit = nl80211_start_radar_detection,
8924                 .policy = nl80211_policy,
8925                 .flags = GENL_ADMIN_PERM,
8926                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8927                                   NL80211_FLAG_NEED_RTNL,
8928         },
8929         {
8930                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
8931                 .doit = nl80211_get_protocol_features,
8932                 .policy = nl80211_policy,
8933         },
8934         {
8935                 .cmd = NL80211_CMD_UPDATE_FT_IES,
8936                 .doit = nl80211_update_ft_ies,
8937                 .policy = nl80211_policy,
8938                 .flags = GENL_ADMIN_PERM,
8939                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8940                                   NL80211_FLAG_NEED_RTNL,
8941         },
8942         {
8943                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
8944                 .doit = nl80211_crit_protocol_start,
8945                 .policy = nl80211_policy,
8946                 .flags = GENL_ADMIN_PERM,
8947                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8948                                   NL80211_FLAG_NEED_RTNL,
8949         },
8950         {
8951                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
8952                 .doit = nl80211_crit_protocol_stop,
8953                 .policy = nl80211_policy,
8954                 .flags = GENL_ADMIN_PERM,
8955                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8956                                   NL80211_FLAG_NEED_RTNL,
8957         }
8958 };
8959
8960 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8961         .name = "mlme",
8962 };
8963
8964 /* multicast groups */
8965 static struct genl_multicast_group nl80211_config_mcgrp = {
8966         .name = "config",
8967 };
8968 static struct genl_multicast_group nl80211_scan_mcgrp = {
8969         .name = "scan",
8970 };
8971 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8972         .name = "regulatory",
8973 };
8974
8975 /* notification functions */
8976
8977 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8978 {
8979         struct sk_buff *msg;
8980
8981         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8982         if (!msg)
8983                 return;
8984
8985         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0,
8986                                false, NULL, NULL, NULL) < 0) {
8987                 nlmsg_free(msg);
8988                 return;
8989         }
8990
8991         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8992                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8993 }
8994
8995 static int nl80211_add_scan_req(struct sk_buff *msg,
8996                                 struct cfg80211_registered_device *rdev)
8997 {
8998         struct cfg80211_scan_request *req = rdev->scan_req;
8999         struct nlattr *nest;
9000         int i;
9001
9002         if (WARN_ON(!req))
9003                 return 0;
9004
9005         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9006         if (!nest)
9007                 goto nla_put_failure;
9008         for (i = 0; i < req->n_ssids; i++) {
9009                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9010                         goto nla_put_failure;
9011         }
9012         nla_nest_end(msg, nest);
9013
9014         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9015         if (!nest)
9016                 goto nla_put_failure;
9017         for (i = 0; i < req->n_channels; i++) {
9018                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9019                         goto nla_put_failure;
9020         }
9021         nla_nest_end(msg, nest);
9022
9023         if (req->ie &&
9024             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9025                 goto nla_put_failure;
9026
9027         if (req->flags)
9028                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9029
9030         return 0;
9031  nla_put_failure:
9032         return -ENOBUFS;
9033 }
9034
9035 static int nl80211_send_scan_msg(struct sk_buff *msg,
9036                                  struct cfg80211_registered_device *rdev,
9037                                  struct wireless_dev *wdev,
9038                                  u32 portid, u32 seq, int flags,
9039                                  u32 cmd)
9040 {
9041         void *hdr;
9042
9043         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9044         if (!hdr)
9045                 return -1;
9046
9047         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9048             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9049                                          wdev->netdev->ifindex)) ||
9050             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9051                 goto nla_put_failure;
9052
9053         /* ignore errors and send incomplete event anyway */
9054         nl80211_add_scan_req(msg, rdev);
9055
9056         return genlmsg_end(msg, hdr);
9057
9058  nla_put_failure:
9059         genlmsg_cancel(msg, hdr);
9060         return -EMSGSIZE;
9061 }
9062
9063 static int
9064 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9065                             struct cfg80211_registered_device *rdev,
9066                             struct net_device *netdev,
9067                             u32 portid, u32 seq, int flags, u32 cmd)
9068 {
9069         void *hdr;
9070
9071         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9072         if (!hdr)
9073                 return -1;
9074
9075         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9076             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9077                 goto nla_put_failure;
9078
9079         return genlmsg_end(msg, hdr);
9080
9081  nla_put_failure:
9082         genlmsg_cancel(msg, hdr);
9083         return -EMSGSIZE;
9084 }
9085
9086 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9087                              struct wireless_dev *wdev)
9088 {
9089         struct sk_buff *msg;
9090
9091         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9092         if (!msg)
9093                 return;
9094
9095         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9096                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9097                 nlmsg_free(msg);
9098                 return;
9099         }
9100
9101         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9102                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9103 }
9104
9105 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9106                             struct wireless_dev *wdev)
9107 {
9108         struct sk_buff *msg;
9109
9110         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9111         if (!msg)
9112                 return;
9113
9114         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9115                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9116                 nlmsg_free(msg);
9117                 return;
9118         }
9119
9120         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9121                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9122 }
9123
9124 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9125                                struct wireless_dev *wdev)
9126 {
9127         struct sk_buff *msg;
9128
9129         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9130         if (!msg)
9131                 return;
9132
9133         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9134                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9135                 nlmsg_free(msg);
9136                 return;
9137         }
9138
9139         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9140                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9141 }
9142
9143 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9144                                      struct net_device *netdev)
9145 {
9146         struct sk_buff *msg;
9147
9148         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9149         if (!msg)
9150                 return;
9151
9152         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9153                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9154                 nlmsg_free(msg);
9155                 return;
9156         }
9157
9158         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9159                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9160 }
9161
9162 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9163                              struct net_device *netdev, u32 cmd)
9164 {
9165         struct sk_buff *msg;
9166
9167         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9168         if (!msg)
9169                 return;
9170
9171         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9172                 nlmsg_free(msg);
9173                 return;
9174         }
9175
9176         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9177                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9178 }
9179
9180 /*
9181  * This can happen on global regulatory changes or device specific settings
9182  * based on custom world regulatory domains.
9183  */
9184 void nl80211_send_reg_change_event(struct regulatory_request *request)
9185 {
9186         struct sk_buff *msg;
9187         void *hdr;
9188
9189         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9190         if (!msg)
9191                 return;
9192
9193         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9194         if (!hdr) {
9195                 nlmsg_free(msg);
9196                 return;
9197         }
9198
9199         /* Userspace can always count this one always being set */
9200         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9201                 goto nla_put_failure;
9202
9203         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9204                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9205                                NL80211_REGDOM_TYPE_WORLD))
9206                         goto nla_put_failure;
9207         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9208                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9209                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9210                         goto nla_put_failure;
9211         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9212                    request->intersect) {
9213                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9214                                NL80211_REGDOM_TYPE_INTERSECTION))
9215                         goto nla_put_failure;
9216         } else {
9217                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9218                                NL80211_REGDOM_TYPE_COUNTRY) ||
9219                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9220                                    request->alpha2))
9221                         goto nla_put_failure;
9222         }
9223
9224         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9225             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9226                 goto nla_put_failure;
9227
9228         genlmsg_end(msg, hdr);
9229
9230         rcu_read_lock();
9231         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9232                                 GFP_ATOMIC);
9233         rcu_read_unlock();
9234
9235         return;
9236
9237 nla_put_failure:
9238         genlmsg_cancel(msg, hdr);
9239         nlmsg_free(msg);
9240 }
9241
9242 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9243                                     struct net_device *netdev,
9244                                     const u8 *buf, size_t len,
9245                                     enum nl80211_commands cmd, gfp_t gfp)
9246 {
9247         struct sk_buff *msg;
9248         void *hdr;
9249
9250         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9251         if (!msg)
9252                 return;
9253
9254         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9255         if (!hdr) {
9256                 nlmsg_free(msg);
9257                 return;
9258         }
9259
9260         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9261             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9262             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9263                 goto nla_put_failure;
9264
9265         genlmsg_end(msg, hdr);
9266
9267         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9268                                 nl80211_mlme_mcgrp.id, gfp);
9269         return;
9270
9271  nla_put_failure:
9272         genlmsg_cancel(msg, hdr);
9273         nlmsg_free(msg);
9274 }
9275
9276 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9277                           struct net_device *netdev, const u8 *buf,
9278                           size_t len, gfp_t gfp)
9279 {
9280         nl80211_send_mlme_event(rdev, netdev, buf, len,
9281                                 NL80211_CMD_AUTHENTICATE, gfp);
9282 }
9283
9284 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9285                            struct net_device *netdev, const u8 *buf,
9286                            size_t len, gfp_t gfp)
9287 {
9288         nl80211_send_mlme_event(rdev, netdev, buf, len,
9289                                 NL80211_CMD_ASSOCIATE, gfp);
9290 }
9291
9292 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9293                          struct net_device *netdev, const u8 *buf,
9294                          size_t len, gfp_t gfp)
9295 {
9296         nl80211_send_mlme_event(rdev, netdev, buf, len,
9297                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9298 }
9299
9300 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9301                            struct net_device *netdev, const u8 *buf,
9302                            size_t len, gfp_t gfp)
9303 {
9304         nl80211_send_mlme_event(rdev, netdev, buf, len,
9305                                 NL80211_CMD_DISASSOCIATE, gfp);
9306 }
9307
9308 void cfg80211_send_unprot_deauth(struct net_device *dev, const u8 *buf,
9309                                  size_t len)
9310 {
9311         struct wireless_dev *wdev = dev->ieee80211_ptr;
9312         struct wiphy *wiphy = wdev->wiphy;
9313         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9314
9315         trace_cfg80211_send_unprot_deauth(dev);
9316         nl80211_send_mlme_event(rdev, dev, buf, len,
9317                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, GFP_ATOMIC);
9318 }
9319 EXPORT_SYMBOL(cfg80211_send_unprot_deauth);
9320
9321 void cfg80211_send_unprot_disassoc(struct net_device *dev, const u8 *buf,
9322                                    size_t len)
9323 {
9324         struct wireless_dev *wdev = dev->ieee80211_ptr;
9325         struct wiphy *wiphy = wdev->wiphy;
9326         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9327
9328         trace_cfg80211_send_unprot_disassoc(dev);
9329         nl80211_send_mlme_event(rdev, dev, buf, len,
9330                                 NL80211_CMD_UNPROT_DISASSOCIATE, GFP_ATOMIC);
9331 }
9332 EXPORT_SYMBOL(cfg80211_send_unprot_disassoc);
9333
9334 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9335                                       struct net_device *netdev, int cmd,
9336                                       const u8 *addr, 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, cmd);
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             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9354             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9355                 goto nla_put_failure;
9356
9357         genlmsg_end(msg, hdr);
9358
9359         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9360                                 nl80211_mlme_mcgrp.id, gfp);
9361         return;
9362
9363  nla_put_failure:
9364         genlmsg_cancel(msg, hdr);
9365         nlmsg_free(msg);
9366 }
9367
9368 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9369                                struct net_device *netdev, const u8 *addr,
9370                                gfp_t gfp)
9371 {
9372         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9373                                   addr, gfp);
9374 }
9375
9376 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9377                                 struct net_device *netdev, const u8 *addr,
9378                                 gfp_t gfp)
9379 {
9380         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9381                                   addr, gfp);
9382 }
9383
9384 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9385                                  struct net_device *netdev, const u8 *bssid,
9386                                  const u8 *req_ie, size_t req_ie_len,
9387                                  const u8 *resp_ie, size_t resp_ie_len,
9388                                  u16 status, gfp_t gfp)
9389 {
9390         struct sk_buff *msg;
9391         void *hdr;
9392
9393         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9394         if (!msg)
9395                 return;
9396
9397         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9398         if (!hdr) {
9399                 nlmsg_free(msg);
9400                 return;
9401         }
9402
9403         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9404             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9405             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9406             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9407             (req_ie &&
9408              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9409             (resp_ie &&
9410              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9411                 goto nla_put_failure;
9412
9413         genlmsg_end(msg, hdr);
9414
9415         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9416                                 nl80211_mlme_mcgrp.id, gfp);
9417         return;
9418
9419  nla_put_failure:
9420         genlmsg_cancel(msg, hdr);
9421         nlmsg_free(msg);
9422
9423 }
9424
9425 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9426                          struct net_device *netdev, const u8 *bssid,
9427                          const u8 *req_ie, size_t req_ie_len,
9428                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9429 {
9430         struct sk_buff *msg;
9431         void *hdr;
9432
9433         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9434         if (!msg)
9435                 return;
9436
9437         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9438         if (!hdr) {
9439                 nlmsg_free(msg);
9440                 return;
9441         }
9442
9443         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9444             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9445             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9446             (req_ie &&
9447              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9448             (resp_ie &&
9449              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9450                 goto nla_put_failure;
9451
9452         genlmsg_end(msg, hdr);
9453
9454         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9455                                 nl80211_mlme_mcgrp.id, gfp);
9456         return;
9457
9458  nla_put_failure:
9459         genlmsg_cancel(msg, hdr);
9460         nlmsg_free(msg);
9461
9462 }
9463
9464 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9465                                struct net_device *netdev, u16 reason,
9466                                const u8 *ie, size_t ie_len, bool from_ap)
9467 {
9468         struct sk_buff *msg;
9469         void *hdr;
9470
9471         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9472         if (!msg)
9473                 return;
9474
9475         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9476         if (!hdr) {
9477                 nlmsg_free(msg);
9478                 return;
9479         }
9480
9481         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9482             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9483             (from_ap && reason &&
9484              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9485             (from_ap &&
9486              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9487             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9488                 goto nla_put_failure;
9489
9490         genlmsg_end(msg, hdr);
9491
9492         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9493                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9494         return;
9495
9496  nla_put_failure:
9497         genlmsg_cancel(msg, hdr);
9498         nlmsg_free(msg);
9499
9500 }
9501
9502 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9503                              struct net_device *netdev, const u8 *bssid,
9504                              gfp_t gfp)
9505 {
9506         struct sk_buff *msg;
9507         void *hdr;
9508
9509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9510         if (!msg)
9511                 return;
9512
9513         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9514         if (!hdr) {
9515                 nlmsg_free(msg);
9516                 return;
9517         }
9518
9519         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9520             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9521             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9522                 goto nla_put_failure;
9523
9524         genlmsg_end(msg, hdr);
9525
9526         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9527                                 nl80211_mlme_mcgrp.id, gfp);
9528         return;
9529
9530  nla_put_failure:
9531         genlmsg_cancel(msg, hdr);
9532         nlmsg_free(msg);
9533 }
9534
9535 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9536                                         const u8* ie, u8 ie_len, gfp_t gfp)
9537 {
9538         struct wireless_dev *wdev = dev->ieee80211_ptr;
9539         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9540         struct sk_buff *msg;
9541         void *hdr;
9542
9543         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9544                 return;
9545
9546         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9547
9548         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9549         if (!msg)
9550                 return;
9551
9552         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9553         if (!hdr) {
9554                 nlmsg_free(msg);
9555                 return;
9556         }
9557
9558         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9559             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9560             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9561             (ie_len && ie &&
9562              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9563                 goto nla_put_failure;
9564
9565         genlmsg_end(msg, hdr);
9566
9567         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9568                                 nl80211_mlme_mcgrp.id, gfp);
9569         return;
9570
9571  nla_put_failure:
9572         genlmsg_cancel(msg, hdr);
9573         nlmsg_free(msg);
9574 }
9575 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9576
9577 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9578                                  struct net_device *netdev, const u8 *addr,
9579                                  enum nl80211_key_type key_type, int key_id,
9580                                  const u8 *tsc, gfp_t gfp)
9581 {
9582         struct sk_buff *msg;
9583         void *hdr;
9584
9585         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9586         if (!msg)
9587                 return;
9588
9589         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9590         if (!hdr) {
9591                 nlmsg_free(msg);
9592                 return;
9593         }
9594
9595         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9596             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9597             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9598             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9599             (key_id != -1 &&
9600              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9601             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9602                 goto nla_put_failure;
9603
9604         genlmsg_end(msg, hdr);
9605
9606         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9607                                 nl80211_mlme_mcgrp.id, gfp);
9608         return;
9609
9610  nla_put_failure:
9611         genlmsg_cancel(msg, hdr);
9612         nlmsg_free(msg);
9613 }
9614
9615 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9616                                     struct ieee80211_channel *channel_before,
9617                                     struct ieee80211_channel *channel_after)
9618 {
9619         struct sk_buff *msg;
9620         void *hdr;
9621         struct nlattr *nl_freq;
9622
9623         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9624         if (!msg)
9625                 return;
9626
9627         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9628         if (!hdr) {
9629                 nlmsg_free(msg);
9630                 return;
9631         }
9632
9633         /*
9634          * Since we are applying the beacon hint to a wiphy we know its
9635          * wiphy_idx is valid
9636          */
9637         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9638                 goto nla_put_failure;
9639
9640         /* Before */
9641         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9642         if (!nl_freq)
9643                 goto nla_put_failure;
9644         if (nl80211_msg_put_channel(msg, channel_before, false))
9645                 goto nla_put_failure;
9646         nla_nest_end(msg, nl_freq);
9647
9648         /* After */
9649         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9650         if (!nl_freq)
9651                 goto nla_put_failure;
9652         if (nl80211_msg_put_channel(msg, channel_after, false))
9653                 goto nla_put_failure;
9654         nla_nest_end(msg, nl_freq);
9655
9656         genlmsg_end(msg, hdr);
9657
9658         rcu_read_lock();
9659         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9660                                 GFP_ATOMIC);
9661         rcu_read_unlock();
9662
9663         return;
9664
9665 nla_put_failure:
9666         genlmsg_cancel(msg, hdr);
9667         nlmsg_free(msg);
9668 }
9669
9670 static void nl80211_send_remain_on_chan_event(
9671         int cmd, struct cfg80211_registered_device *rdev,
9672         struct wireless_dev *wdev, u64 cookie,
9673         struct ieee80211_channel *chan,
9674         unsigned int duration, gfp_t gfp)
9675 {
9676         struct sk_buff *msg;
9677         void *hdr;
9678
9679         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9680         if (!msg)
9681                 return;
9682
9683         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9684         if (!hdr) {
9685                 nlmsg_free(msg);
9686                 return;
9687         }
9688
9689         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9690             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9691                                          wdev->netdev->ifindex)) ||
9692             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9693             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9694             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9695                         NL80211_CHAN_NO_HT) ||
9696             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9697                 goto nla_put_failure;
9698
9699         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9700             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9701                 goto nla_put_failure;
9702
9703         genlmsg_end(msg, hdr);
9704
9705         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9706                                 nl80211_mlme_mcgrp.id, gfp);
9707         return;
9708
9709  nla_put_failure:
9710         genlmsg_cancel(msg, hdr);
9711         nlmsg_free(msg);
9712 }
9713
9714 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9715                                struct ieee80211_channel *chan,
9716                                unsigned int duration, gfp_t gfp)
9717 {
9718         struct wiphy *wiphy = wdev->wiphy;
9719         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9720
9721         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9722         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9723                                           rdev, wdev, cookie, chan,
9724                                           duration, gfp);
9725 }
9726 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9727
9728 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9729                                         struct ieee80211_channel *chan,
9730                                         gfp_t gfp)
9731 {
9732         struct wiphy *wiphy = wdev->wiphy;
9733         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9734
9735         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9736         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9737                                           rdev, wdev, cookie, chan, 0, gfp);
9738 }
9739 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9740
9741 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9742                       struct station_info *sinfo, gfp_t gfp)
9743 {
9744         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9745         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9746         struct sk_buff *msg;
9747
9748         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9749
9750         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9751         if (!msg)
9752                 return;
9753
9754         if (nl80211_send_station(msg, 0, 0, 0,
9755                                  rdev, dev, mac_addr, sinfo) < 0) {
9756                 nlmsg_free(msg);
9757                 return;
9758         }
9759
9760         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9761                                 nl80211_mlme_mcgrp.id, gfp);
9762 }
9763 EXPORT_SYMBOL(cfg80211_new_sta);
9764
9765 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9766 {
9767         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9768         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9769         struct sk_buff *msg;
9770         void *hdr;
9771
9772         trace_cfg80211_del_sta(dev, mac_addr);
9773
9774         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9775         if (!msg)
9776                 return;
9777
9778         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9779         if (!hdr) {
9780                 nlmsg_free(msg);
9781                 return;
9782         }
9783
9784         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9785             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9786                 goto nla_put_failure;
9787
9788         genlmsg_end(msg, hdr);
9789
9790         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9791                                 nl80211_mlme_mcgrp.id, gfp);
9792         return;
9793
9794  nla_put_failure:
9795         genlmsg_cancel(msg, hdr);
9796         nlmsg_free(msg);
9797 }
9798 EXPORT_SYMBOL(cfg80211_del_sta);
9799
9800 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9801                           enum nl80211_connect_failed_reason reason,
9802                           gfp_t gfp)
9803 {
9804         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9805         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9806         struct sk_buff *msg;
9807         void *hdr;
9808
9809         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9810         if (!msg)
9811                 return;
9812
9813         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9814         if (!hdr) {
9815                 nlmsg_free(msg);
9816                 return;
9817         }
9818
9819         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9820             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9821             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9822                 goto nla_put_failure;
9823
9824         genlmsg_end(msg, hdr);
9825
9826         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9827                                 nl80211_mlme_mcgrp.id, gfp);
9828         return;
9829
9830  nla_put_failure:
9831         genlmsg_cancel(msg, hdr);
9832         nlmsg_free(msg);
9833 }
9834 EXPORT_SYMBOL(cfg80211_conn_failed);
9835
9836 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9837                                        const u8 *addr, gfp_t gfp)
9838 {
9839         struct wireless_dev *wdev = dev->ieee80211_ptr;
9840         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9841         struct sk_buff *msg;
9842         void *hdr;
9843         int err;
9844         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9845
9846         if (!nlportid)
9847                 return false;
9848
9849         msg = nlmsg_new(100, gfp);
9850         if (!msg)
9851                 return true;
9852
9853         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9854         if (!hdr) {
9855                 nlmsg_free(msg);
9856                 return true;
9857         }
9858
9859         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9860             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9861             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9862                 goto nla_put_failure;
9863
9864         err = genlmsg_end(msg, hdr);
9865         if (err < 0) {
9866                 nlmsg_free(msg);
9867                 return true;
9868         }
9869
9870         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9871         return true;
9872
9873  nla_put_failure:
9874         genlmsg_cancel(msg, hdr);
9875         nlmsg_free(msg);
9876         return true;
9877 }
9878
9879 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9880                                 const u8 *addr, gfp_t gfp)
9881 {
9882         struct wireless_dev *wdev = dev->ieee80211_ptr;
9883         bool ret;
9884
9885         trace_cfg80211_rx_spurious_frame(dev, addr);
9886
9887         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9888                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9889                 trace_cfg80211_return_bool(false);
9890                 return false;
9891         }
9892         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9893                                          addr, gfp);
9894         trace_cfg80211_return_bool(ret);
9895         return ret;
9896 }
9897 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9898
9899 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9900                                         const u8 *addr, gfp_t gfp)
9901 {
9902         struct wireless_dev *wdev = dev->ieee80211_ptr;
9903         bool ret;
9904
9905         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9906
9907         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9908                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9909                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9910                 trace_cfg80211_return_bool(false);
9911                 return false;
9912         }
9913         ret = __nl80211_unexpected_frame(dev,
9914                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9915                                          addr, gfp);
9916         trace_cfg80211_return_bool(ret);
9917         return ret;
9918 }
9919 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9920
9921 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9922                       struct wireless_dev *wdev, u32 nlportid,
9923                       int freq, int sig_dbm,
9924                       const u8 *buf, size_t len, gfp_t gfp)
9925 {
9926         struct net_device *netdev = wdev->netdev;
9927         struct sk_buff *msg;
9928         void *hdr;
9929
9930         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9931         if (!msg)
9932                 return -ENOMEM;
9933
9934         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9935         if (!hdr) {
9936                 nlmsg_free(msg);
9937                 return -ENOMEM;
9938         }
9939
9940         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9941             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9942                                         netdev->ifindex)) ||
9943             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9944             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9945             (sig_dbm &&
9946              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9947             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9948                 goto nla_put_failure;
9949
9950         genlmsg_end(msg, hdr);
9951
9952         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9953
9954  nla_put_failure:
9955         genlmsg_cancel(msg, hdr);
9956         nlmsg_free(msg);
9957         return -ENOBUFS;
9958 }
9959
9960 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
9961                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
9962 {
9963         struct wiphy *wiphy = wdev->wiphy;
9964         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9965         struct net_device *netdev = wdev->netdev;
9966         struct sk_buff *msg;
9967         void *hdr;
9968
9969         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
9970
9971         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9972         if (!msg)
9973                 return;
9974
9975         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9976         if (!hdr) {
9977                 nlmsg_free(msg);
9978                 return;
9979         }
9980
9981         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9982             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9983                                    netdev->ifindex)) ||
9984             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9985             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9986             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9987             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9988                 goto nla_put_failure;
9989
9990         genlmsg_end(msg, hdr);
9991
9992         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9993         return;
9994
9995  nla_put_failure:
9996         genlmsg_cancel(msg, hdr);
9997         nlmsg_free(msg);
9998 }
9999 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10000
10001 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10002                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10003                               gfp_t gfp)
10004 {
10005         struct wireless_dev *wdev = dev->ieee80211_ptr;
10006         struct wiphy *wiphy = wdev->wiphy;
10007         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10008         struct sk_buff *msg;
10009         struct nlattr *pinfoattr;
10010         void *hdr;
10011
10012         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10013
10014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10015         if (!msg)
10016                 return;
10017
10018         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10019         if (!hdr) {
10020                 nlmsg_free(msg);
10021                 return;
10022         }
10023
10024         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10025             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10026                 goto nla_put_failure;
10027
10028         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10029         if (!pinfoattr)
10030                 goto nla_put_failure;
10031
10032         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10033                         rssi_event))
10034                 goto nla_put_failure;
10035
10036         nla_nest_end(msg, pinfoattr);
10037
10038         genlmsg_end(msg, hdr);
10039
10040         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10041                                 nl80211_mlme_mcgrp.id, gfp);
10042         return;
10043
10044  nla_put_failure:
10045         genlmsg_cancel(msg, hdr);
10046         nlmsg_free(msg);
10047 }
10048 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10049
10050 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10051                                      struct net_device *netdev, const u8 *bssid,
10052                                      const u8 *replay_ctr, gfp_t gfp)
10053 {
10054         struct sk_buff *msg;
10055         struct nlattr *rekey_attr;
10056         void *hdr;
10057
10058         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10059         if (!msg)
10060                 return;
10061
10062         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10063         if (!hdr) {
10064                 nlmsg_free(msg);
10065                 return;
10066         }
10067
10068         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10069             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10070             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10071                 goto nla_put_failure;
10072
10073         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10074         if (!rekey_attr)
10075                 goto nla_put_failure;
10076
10077         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10078                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10079                 goto nla_put_failure;
10080
10081         nla_nest_end(msg, rekey_attr);
10082
10083         genlmsg_end(msg, hdr);
10084
10085         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10086                                 nl80211_mlme_mcgrp.id, gfp);
10087         return;
10088
10089  nla_put_failure:
10090         genlmsg_cancel(msg, hdr);
10091         nlmsg_free(msg);
10092 }
10093
10094 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10095                                const u8 *replay_ctr, gfp_t gfp)
10096 {
10097         struct wireless_dev *wdev = dev->ieee80211_ptr;
10098         struct wiphy *wiphy = wdev->wiphy;
10099         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10100
10101         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10102         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10103 }
10104 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10105
10106 static void
10107 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10108                                struct net_device *netdev, int index,
10109                                const u8 *bssid, bool preauth, gfp_t gfp)
10110 {
10111         struct sk_buff *msg;
10112         struct nlattr *attr;
10113         void *hdr;
10114
10115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10116         if (!msg)
10117                 return;
10118
10119         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10120         if (!hdr) {
10121                 nlmsg_free(msg);
10122                 return;
10123         }
10124
10125         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10126             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10127                 goto nla_put_failure;
10128
10129         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10130         if (!attr)
10131                 goto nla_put_failure;
10132
10133         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10134             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10135             (preauth &&
10136              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10137                 goto nla_put_failure;
10138
10139         nla_nest_end(msg, attr);
10140
10141         genlmsg_end(msg, hdr);
10142
10143         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10144                                 nl80211_mlme_mcgrp.id, gfp);
10145         return;
10146
10147  nla_put_failure:
10148         genlmsg_cancel(msg, hdr);
10149         nlmsg_free(msg);
10150 }
10151
10152 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10153                                      const u8 *bssid, bool preauth, gfp_t gfp)
10154 {
10155         struct wireless_dev *wdev = dev->ieee80211_ptr;
10156         struct wiphy *wiphy = wdev->wiphy;
10157         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10158
10159         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10160         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10161 }
10162 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10163
10164 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10165                                      struct net_device *netdev,
10166                                      struct cfg80211_chan_def *chandef,
10167                                      gfp_t gfp)
10168 {
10169         struct sk_buff *msg;
10170         void *hdr;
10171
10172         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10173         if (!msg)
10174                 return;
10175
10176         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10177         if (!hdr) {
10178                 nlmsg_free(msg);
10179                 return;
10180         }
10181
10182         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10183                 goto nla_put_failure;
10184
10185         if (nl80211_send_chandef(msg, chandef))
10186                 goto nla_put_failure;
10187
10188         genlmsg_end(msg, hdr);
10189
10190         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10191                                 nl80211_mlme_mcgrp.id, gfp);
10192         return;
10193
10194  nla_put_failure:
10195         genlmsg_cancel(msg, hdr);
10196         nlmsg_free(msg);
10197 }
10198
10199 void cfg80211_ch_switch_notify(struct net_device *dev,
10200                                struct cfg80211_chan_def *chandef)
10201 {
10202         struct wireless_dev *wdev = dev->ieee80211_ptr;
10203         struct wiphy *wiphy = wdev->wiphy;
10204         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10205
10206         trace_cfg80211_ch_switch_notify(dev, chandef);
10207
10208         wdev_lock(wdev);
10209
10210         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10211                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10212                 goto out;
10213
10214         wdev->channel = chandef->chan;
10215         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10216 out:
10217         wdev_unlock(wdev);
10218         return;
10219 }
10220 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10221
10222 void cfg80211_cqm_txe_notify(struct net_device *dev,
10223                              const u8 *peer, u32 num_packets,
10224                              u32 rate, u32 intvl, gfp_t gfp)
10225 {
10226         struct wireless_dev *wdev = dev->ieee80211_ptr;
10227         struct wiphy *wiphy = wdev->wiphy;
10228         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10229         struct sk_buff *msg;
10230         struct nlattr *pinfoattr;
10231         void *hdr;
10232
10233         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10234         if (!msg)
10235                 return;
10236
10237         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10238         if (!hdr) {
10239                 nlmsg_free(msg);
10240                 return;
10241         }
10242
10243         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10244             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10245             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10246                 goto nla_put_failure;
10247
10248         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10249         if (!pinfoattr)
10250                 goto nla_put_failure;
10251
10252         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10253                 goto nla_put_failure;
10254
10255         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10256                 goto nla_put_failure;
10257
10258         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10259                 goto nla_put_failure;
10260
10261         nla_nest_end(msg, pinfoattr);
10262
10263         genlmsg_end(msg, hdr);
10264
10265         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10266                                 nl80211_mlme_mcgrp.id, gfp);
10267         return;
10268
10269  nla_put_failure:
10270         genlmsg_cancel(msg, hdr);
10271         nlmsg_free(msg);
10272 }
10273 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10274
10275 void
10276 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10277                      struct cfg80211_chan_def *chandef,
10278                      enum nl80211_radar_event event,
10279                      struct net_device *netdev, gfp_t gfp)
10280 {
10281         struct sk_buff *msg;
10282         void *hdr;
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_RADAR_DETECT);
10289         if (!hdr) {
10290                 nlmsg_free(msg);
10291                 return;
10292         }
10293
10294         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10295                 goto nla_put_failure;
10296
10297         /* NOP and radar events don't need a netdev parameter */
10298         if (netdev) {
10299                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10300
10301                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10302                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10303                         goto nla_put_failure;
10304         }
10305
10306         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10307                 goto nla_put_failure;
10308
10309         if (nl80211_send_chandef(msg, chandef))
10310                 goto nla_put_failure;
10311
10312         if (genlmsg_end(msg, hdr) < 0) {
10313                 nlmsg_free(msg);
10314                 return;
10315         }
10316
10317         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10318                                 nl80211_mlme_mcgrp.id, gfp);
10319         return;
10320
10321  nla_put_failure:
10322         genlmsg_cancel(msg, hdr);
10323         nlmsg_free(msg);
10324 }
10325
10326 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10327                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10328 {
10329         struct wireless_dev *wdev = dev->ieee80211_ptr;
10330         struct wiphy *wiphy = wdev->wiphy;
10331         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10332         struct sk_buff *msg;
10333         struct nlattr *pinfoattr;
10334         void *hdr;
10335
10336         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10337
10338         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10339         if (!msg)
10340                 return;
10341
10342         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10343         if (!hdr) {
10344                 nlmsg_free(msg);
10345                 return;
10346         }
10347
10348         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10349             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10350             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10351                 goto nla_put_failure;
10352
10353         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10354         if (!pinfoattr)
10355                 goto nla_put_failure;
10356
10357         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10358                 goto nla_put_failure;
10359
10360         nla_nest_end(msg, pinfoattr);
10361
10362         genlmsg_end(msg, hdr);
10363
10364         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10365                                 nl80211_mlme_mcgrp.id, gfp);
10366         return;
10367
10368  nla_put_failure:
10369         genlmsg_cancel(msg, hdr);
10370         nlmsg_free(msg);
10371 }
10372 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10373
10374 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10375                            u64 cookie, bool acked, gfp_t gfp)
10376 {
10377         struct wireless_dev *wdev = dev->ieee80211_ptr;
10378         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10379         struct sk_buff *msg;
10380         void *hdr;
10381         int err;
10382
10383         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10384
10385         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10386
10387         if (!msg)
10388                 return;
10389
10390         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10391         if (!hdr) {
10392                 nlmsg_free(msg);
10393                 return;
10394         }
10395
10396         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10397             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10398             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10399             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10400             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10401                 goto nla_put_failure;
10402
10403         err = genlmsg_end(msg, hdr);
10404         if (err < 0) {
10405                 nlmsg_free(msg);
10406                 return;
10407         }
10408
10409         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10410                                 nl80211_mlme_mcgrp.id, gfp);
10411         return;
10412
10413  nla_put_failure:
10414         genlmsg_cancel(msg, hdr);
10415         nlmsg_free(msg);
10416 }
10417 EXPORT_SYMBOL(cfg80211_probe_status);
10418
10419 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10420                                  const u8 *frame, size_t len,
10421                                  int freq, int sig_dbm)
10422 {
10423         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10424         struct sk_buff *msg;
10425         void *hdr;
10426         struct cfg80211_beacon_registration *reg;
10427
10428         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10429
10430         spin_lock_bh(&rdev->beacon_registrations_lock);
10431         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10432                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10433                 if (!msg) {
10434                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10435                         return;
10436                 }
10437
10438                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10439                 if (!hdr)
10440                         goto nla_put_failure;
10441
10442                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10443                     (freq &&
10444                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10445                     (sig_dbm &&
10446                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10447                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10448                         goto nla_put_failure;
10449
10450                 genlmsg_end(msg, hdr);
10451
10452                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10453         }
10454         spin_unlock_bh(&rdev->beacon_registrations_lock);
10455         return;
10456
10457  nla_put_failure:
10458         spin_unlock_bh(&rdev->beacon_registrations_lock);
10459         if (hdr)
10460                 genlmsg_cancel(msg, hdr);
10461         nlmsg_free(msg);
10462 }
10463 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10464
10465 #ifdef CONFIG_PM
10466 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10467                                    struct cfg80211_wowlan_wakeup *wakeup,
10468                                    gfp_t gfp)
10469 {
10470         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10471         struct sk_buff *msg;
10472         void *hdr;
10473         int err, size = 200;
10474
10475         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10476
10477         if (wakeup)
10478                 size += wakeup->packet_present_len;
10479
10480         msg = nlmsg_new(size, gfp);
10481         if (!msg)
10482                 return;
10483
10484         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10485         if (!hdr)
10486                 goto free_msg;
10487
10488         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10489             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10490                 goto free_msg;
10491
10492         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10493                                         wdev->netdev->ifindex))
10494                 goto free_msg;
10495
10496         if (wakeup) {
10497                 struct nlattr *reasons;
10498
10499                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10500
10501                 if (wakeup->disconnect &&
10502                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10503                         goto free_msg;
10504                 if (wakeup->magic_pkt &&
10505                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10506                         goto free_msg;
10507                 if (wakeup->gtk_rekey_failure &&
10508                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10509                         goto free_msg;
10510                 if (wakeup->eap_identity_req &&
10511                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10512                         goto free_msg;
10513                 if (wakeup->four_way_handshake &&
10514                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10515                         goto free_msg;
10516                 if (wakeup->rfkill_release &&
10517                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10518                         goto free_msg;
10519
10520                 if (wakeup->pattern_idx >= 0 &&
10521                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10522                                 wakeup->pattern_idx))
10523                         goto free_msg;
10524
10525                 if (wakeup->tcp_match)
10526                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10527
10528                 if (wakeup->tcp_connlost)
10529                         nla_put_flag(msg,
10530                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10531
10532                 if (wakeup->tcp_nomoretokens)
10533                         nla_put_flag(msg,
10534                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10535
10536                 if (wakeup->packet) {
10537                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10538                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10539
10540                         if (!wakeup->packet_80211) {
10541                                 pkt_attr =
10542                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10543                                 len_attr =
10544                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10545                         }
10546
10547                         if (wakeup->packet_len &&
10548                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10549                                 goto free_msg;
10550
10551                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10552                                     wakeup->packet))
10553                                 goto free_msg;
10554                 }
10555
10556                 nla_nest_end(msg, reasons);
10557         }
10558
10559         err = genlmsg_end(msg, hdr);
10560         if (err < 0)
10561                 goto free_msg;
10562
10563         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10564                                 nl80211_mlme_mcgrp.id, gfp);
10565         return;
10566
10567  free_msg:
10568         nlmsg_free(msg);
10569 }
10570 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10571 #endif
10572
10573 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10574                                 enum nl80211_tdls_operation oper,
10575                                 u16 reason_code, gfp_t gfp)
10576 {
10577         struct wireless_dev *wdev = dev->ieee80211_ptr;
10578         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10579         struct sk_buff *msg;
10580         void *hdr;
10581         int err;
10582
10583         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10584                                          reason_code);
10585
10586         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10587         if (!msg)
10588                 return;
10589
10590         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10591         if (!hdr) {
10592                 nlmsg_free(msg);
10593                 return;
10594         }
10595
10596         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10597             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10598             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10599             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10600             (reason_code > 0 &&
10601              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10602                 goto nla_put_failure;
10603
10604         err = genlmsg_end(msg, hdr);
10605         if (err < 0) {
10606                 nlmsg_free(msg);
10607                 return;
10608         }
10609
10610         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10611                                 nl80211_mlme_mcgrp.id, gfp);
10612         return;
10613
10614  nla_put_failure:
10615         genlmsg_cancel(msg, hdr);
10616         nlmsg_free(msg);
10617 }
10618 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10619
10620 static int nl80211_netlink_notify(struct notifier_block * nb,
10621                                   unsigned long state,
10622                                   void *_notify)
10623 {
10624         struct netlink_notify *notify = _notify;
10625         struct cfg80211_registered_device *rdev;
10626         struct wireless_dev *wdev;
10627         struct cfg80211_beacon_registration *reg, *tmp;
10628
10629         if (state != NETLINK_URELEASE)
10630                 return NOTIFY_DONE;
10631
10632         rcu_read_lock();
10633
10634         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10635                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10636                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10637
10638                 spin_lock_bh(&rdev->beacon_registrations_lock);
10639                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10640                                          list) {
10641                         if (reg->nlportid == notify->portid) {
10642                                 list_del(&reg->list);
10643                                 kfree(reg);
10644                                 break;
10645                         }
10646                 }
10647                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10648         }
10649
10650         rcu_read_unlock();
10651
10652         return NOTIFY_DONE;
10653 }
10654
10655 static struct notifier_block nl80211_netlink_notifier = {
10656         .notifier_call = nl80211_netlink_notify,
10657 };
10658
10659 void cfg80211_ft_event(struct net_device *netdev,
10660                        struct cfg80211_ft_event_params *ft_event)
10661 {
10662         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
10663         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10664         struct sk_buff *msg;
10665         void *hdr;
10666         int err;
10667
10668         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
10669
10670         if (!ft_event->target_ap)
10671                 return;
10672
10673         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10674         if (!msg)
10675                 return;
10676
10677         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
10678         if (!hdr) {
10679                 nlmsg_free(msg);
10680                 return;
10681         }
10682
10683         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
10684         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
10685         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
10686         if (ft_event->ies)
10687                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
10688         if (ft_event->ric_ies)
10689                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
10690                         ft_event->ric_ies);
10691
10692         err = genlmsg_end(msg, hdr);
10693         if (err < 0) {
10694                 nlmsg_free(msg);
10695                 return;
10696         }
10697
10698         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10699                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10700 }
10701 EXPORT_SYMBOL(cfg80211_ft_event);
10702
10703 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
10704 {
10705         struct cfg80211_registered_device *rdev;
10706         struct sk_buff *msg;
10707         void *hdr;
10708         u32 nlportid;
10709
10710         rdev = wiphy_to_dev(wdev->wiphy);
10711         if (!rdev->crit_proto_nlportid)
10712                 return;
10713
10714         nlportid = rdev->crit_proto_nlportid;
10715         rdev->crit_proto_nlportid = 0;
10716
10717         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10718         if (!msg)
10719                 return;
10720
10721         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
10722         if (!hdr)
10723                 goto nla_put_failure;
10724
10725         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10726             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10727                 goto nla_put_failure;
10728
10729         genlmsg_end(msg, hdr);
10730
10731         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10732         return;
10733
10734  nla_put_failure:
10735         if (hdr)
10736                 genlmsg_cancel(msg, hdr);
10737         nlmsg_free(msg);
10738
10739 }
10740 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
10741
10742 /* initialisation/exit functions */
10743
10744 int nl80211_init(void)
10745 {
10746         int err;
10747
10748         err = genl_register_family_with_ops(&nl80211_fam,
10749                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10750         if (err)
10751                 return err;
10752
10753         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10754         if (err)
10755                 goto err_out;
10756
10757         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10758         if (err)
10759                 goto err_out;
10760
10761         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10762         if (err)
10763                 goto err_out;
10764
10765         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10766         if (err)
10767                 goto err_out;
10768
10769 #ifdef CONFIG_NL80211_TESTMODE
10770         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10771         if (err)
10772                 goto err_out;
10773 #endif
10774
10775         err = netlink_register_notifier(&nl80211_netlink_notifier);
10776         if (err)
10777                 goto err_out;
10778
10779         return 0;
10780  err_out:
10781         genl_unregister_family(&nl80211_fam);
10782         return err;
10783 }
10784
10785 void nl80211_exit(void)
10786 {
10787         netlink_unregister_notifier(&nl80211_netlink_notifier);
10788         genl_unregister_family(&nl80211_fam);
10789 }