net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <[email protected]>
   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                 /* 0 is the first index - add 1 to parse only once */
 445                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 446                 cb->args[1] = (*wdev)->identifier;
 447         } else {
 448                 /* subtract the 1 again here */
 449                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 450                 struct wireless_dev *tmp;
 451
 452                 if (!wiphy) {
 453                         err = -ENODEV;
 454                         goto out_unlock;
 455                 }
 456                 *rdev = wiphy_to_dev(wiphy);
 457                 *wdev = NULL;
 458
 459                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 460                         if (tmp->identifier == cb->args[1]) {
 461                                 *wdev = tmp;
 462                                 break;
 463                         }
 464                 }
 465
 466                 if (!*wdev) {
 467                         err = -ENODEV;
 468                         goto out_unlock;
 469                 }
 470         }
 471
 472         return 0;
 473  out_unlock:
 474         rtnl_unlock();
 475         return err;
 476 }
 477
 478 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 479 {
 480         rtnl_unlock();
 481 }
 482
 483 /* IE validation */
 484 static bool is_valid_ie_attr(const struct nlattr *attr)
 485 {
 486         const u8 *pos;
 487         int len;
 488
 489         if (!attr)
 490                 return true;
 491
 492         pos = nla_data(attr);
 493         len = nla_len(attr);
 494
 495         while (len) {
 496                 u8 elemlen;
 497
 498                 if (len < 2)
 499                         return false;
 500                 len -= 2;
 501
 502                 elemlen = pos[1];
 503                 if (elemlen > len)
 504                         return false;
 505
 506                 len -= elemlen;
 507                 pos += 2 + elemlen;
 508         }
 509
 510         return true;
 511 }
 512
 513 /* message building helper */
 514 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 515                                    int flags, u8 cmd)
 516 {
 517         /* since there is no private header just add the generic one */
 518         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 519 }
 520
 521 static int nl80211_msg_put_channel(struct sk_buff *msg,
 522                                    struct ieee80211_channel *chan,
 523                                    bool large)
 524 {
 525         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 526                         chan->center_freq))
 527                 goto nla_put_failure;
 528
 529         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 530             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 531                 goto nla_put_failure;
 532         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 533             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 534                 goto nla_put_failure;
 535         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 536             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 537                 goto nla_put_failure;
 538         if (chan->flags & IEEE80211_CHAN_RADAR) {
 539                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 540                         goto nla_put_failure;
 541                 if (large) {
 542                         u32 time;
 543
 544                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 545
 546                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 547                                         chan->dfs_state))
 548                                 goto nla_put_failure;
 549                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 550                                         time))
 551                                 goto nla_put_failure;
 552                 }
 553         }
 554
 555         if (large) {
 556                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 557                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 558                         goto nla_put_failure;
 559                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 560                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 561                         goto nla_put_failure;
 562                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 563                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 564                         goto nla_put_failure;
 565                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 566                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 567                         goto nla_put_failure;
 568         }
 569
 570         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 571                         DBM_TO_MBM(chan->max_power)))
 572                 goto nla_put_failure;
 573
 574         return 0;
 575
 576  nla_put_failure:
 577         return -ENOBUFS;
 578 }
 579
 580 /* netlink command implementations */
 581
 582 struct key_parse {
 583         struct key_params p;
 584         int idx;
 585         int type;
 586         bool def, defmgmt;
 587         bool def_uni, def_multi;
 588 };
 589
 590 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 591 {
 592         struct nlattr *tb[NL80211_KEY_MAX + 1];
 593         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 594                                    nl80211_key_policy);
 595         if (err)
 596                 return err;
 597
 598         k->def = !!tb[NL80211_KEY_DEFAULT];
 599         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 600
 601         if (k->def) {
 602                 k->def_uni = true;
 603                 k->def_multi = true;
 604         }
 605         if (k->defmgmt)
 606                 k->def_multi = true;
 607
 608         if (tb[NL80211_KEY_IDX])
 609                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 610
 611         if (tb[NL80211_KEY_DATA]) {
 612                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 613                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 614         }
 615
 616         if (tb[NL80211_KEY_SEQ]) {
 617                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 618                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 619         }
 620
 621         if (tb[NL80211_KEY_CIPHER])
 622                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 623
 624         if (tb[NL80211_KEY_TYPE]) {
 625                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 626                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 627                         return -EINVAL;
 628         }
 629
 630         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 631                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 632                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 633                                        tb[NL80211_KEY_DEFAULT_TYPES],
 634                                        nl80211_key_default_policy);
 635                 if (err)
 636                         return err;
 637
 638                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 639                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 640         }
 641
 642         return 0;
 643 }
 644
 645 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 646 {
 647         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 648                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 649                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 650         }
 651
 652         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 653                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 654                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 655         }
 656
 657         if (info->attrs[NL80211_ATTR_KEY_IDX])
 658                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 659
 660         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 661                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 662
 663         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 664         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 665
 666         if (k->def) {
 667                 k->def_uni = true;
 668                 k->def_multi = true;
 669         }
 670         if (k->defmgmt)
 671                 k->def_multi = true;
 672
 673         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 674                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 675                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 676                         return -EINVAL;
 677         }
 678
 679         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 680                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 681                 int err = nla_parse_nested(
 682                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 683                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 684                                 nl80211_key_default_policy);
 685                 if (err)
 686                         return err;
 687
 688                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 689                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 690         }
 691
 692         return 0;
 693 }
 694
 695 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 696 {
 697         int err;
 698
 699         memset(k, 0, sizeof(*k));
 700         k->idx = -1;
 701         k->type = -1;
 702
 703         if (info->attrs[NL80211_ATTR_KEY])
 704                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 705         else
 706                 err = nl80211_parse_key_old(info, k);
 707
 708         if (err)
 709                 return err;
 710
 711         if (k->def && k->defmgmt)
 712                 return -EINVAL;
 713
 714         if (k->defmgmt) {
 715                 if (k->def_uni || !k->def_multi)
 716                         return -EINVAL;
 717         }
 718
 719         if (k->idx != -1) {
 720                 if (k->defmgmt) {
 721                         if (k->idx < 4 || k->idx > 5)
 722                                 return -EINVAL;
 723                 } else if (k->def) {
 724                         if (k->idx < 0 || k->idx > 3)
 725                                 return -EINVAL;
 726                 } else {
 727                         if (k->idx < 0 || k->idx > 5)
 728                                 return -EINVAL;
 729                 }
 730         }
 731
 732         return 0;
 733 }
 734
 735 static struct cfg80211_cached_keys *
 736 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 737                        struct nlattr *keys, bool *no_ht)
 738 {
 739         struct key_parse parse;
 740         struct nlattr *key;
 741         struct cfg80211_cached_keys *result;
 742         int rem, err, def = 0;
 743
 744         result = kzalloc(sizeof(*result), GFP_KERNEL);
 745         if (!result)
 746                 return ERR_PTR(-ENOMEM);
 747
 748         result->def = -1;
 749         result->defmgmt = -1;
 750
 751         nla_for_each_nested(key, keys, rem) {
 752                 memset(&parse, 0, sizeof(parse));
 753                 parse.idx = -1;
 754
 755                 err = nl80211_parse_key_new(key, &parse);
 756                 if (err)
 757                         goto error;
 758                 err = -EINVAL;
 759                 if (!parse.p.key)
 760                         goto error;
 761                 if (parse.idx < 0 || parse.idx > 4)
 762                         goto error;
 763                 if (parse.def) {
 764                         if (def)
 765                                 goto error;
 766                         def = 1;
 767                         result->def = parse.idx;
 768                         if (!parse.def_uni || !parse.def_multi)
 769                                 goto error;
 770                 } else if (parse.defmgmt)
 771                         goto error;
 772                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 773                                                      parse.idx, false, NULL);
 774                 if (err)
 775                         goto error;
 776                 result->params[parse.idx].cipher = parse.p.cipher;
 777                 result->params[parse.idx].key_len = parse.p.key_len;
 778                 result->params[parse.idx].key = result->data[parse.idx];
 779                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 780
 781                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 782                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 783                         if (no_ht)
 784                                 *no_ht = true;
 785                 }
 786         }
 787
 788         return result;
 789  error:
 790         kfree(result);
 791         return ERR_PTR(err);
 792 }
 793
 794 static int nl80211_key_allowed(struct wireless_dev *wdev)
 795 {
 796         ASSERT_WDEV_LOCK(wdev);
 797
 798         switch (wdev->iftype) {
 799         case NL80211_IFTYPE_AP:
 800         case NL80211_IFTYPE_AP_VLAN:
 801         case NL80211_IFTYPE_P2P_GO:
 802         case NL80211_IFTYPE_MESH_POINT:
 803                 break;
 804         case NL80211_IFTYPE_ADHOC:
 805         case NL80211_IFTYPE_STATION:
 806         case NL80211_IFTYPE_P2P_CLIENT:
 807                 if (!wdev->current_bss)
 808                         return -ENOLINK;
 809                 break;
 810         default:
 811                 return -EINVAL;
 812         }
 813
 814         return 0;
 815 }
 816
 817 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 818 {
 819         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 820         int i;
 821
 822         if (!nl_modes)
 823                 goto nla_put_failure;
 824
 825         i = 0;
 826         while (ifmodes) {
 827                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 828                         goto nla_put_failure;
 829                 ifmodes >>= 1;
 830                 i++;
 831         }
 832
 833         nla_nest_end(msg, nl_modes);
 834         return 0;
 835
 836 nla_put_failure:
 837         return -ENOBUFS;
 838 }
 839
 840 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 841                                           struct sk_buff *msg,
 842                                           bool large)
 843 {
 844         struct nlattr *nl_combis;
 845         int i, j;
 846
 847         nl_combis = nla_nest_start(msg,
 848                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 849         if (!nl_combis)
 850                 goto nla_put_failure;
 851
 852         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 853                 const struct ieee80211_iface_combination *c;
 854                 struct nlattr *nl_combi, *nl_limits;
 855
 856                 c = &wiphy->iface_combinations[i];
 857
 858                 nl_combi = nla_nest_start(msg, i + 1);
 859                 if (!nl_combi)
 860                         goto nla_put_failure;
 861
 862                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 863                 if (!nl_limits)
 864                         goto nla_put_failure;
 865
 866                 for (j = 0; j < c->n_limits; j++) {
 867                         struct nlattr *nl_limit;
 868
 869                         nl_limit = nla_nest_start(msg, j + 1);
 870                         if (!nl_limit)
 871                                 goto nla_put_failure;
 872                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 873                                         c->limits[j].max))
 874                                 goto nla_put_failure;
 875                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 876                                                 c->limits[j].types))
 877                                 goto nla_put_failure;
 878                         nla_nest_end(msg, nl_limit);
 879                 }
 880
 881                 nla_nest_end(msg, nl_limits);
 882
 883                 if (c->beacon_int_infra_match &&
 884                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 885                         goto nla_put_failure;
 886                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 887                                 c->num_different_channels) ||
 888                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 889                                 c->max_interfaces))
 890                         goto nla_put_failure;
 891                 if (large &&
 892                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 893                                 c->radar_detect_widths))
 894                         goto nla_put_failure;
 895
 896                 nla_nest_end(msg, nl_combi);
 897         }
 898
 899         nla_nest_end(msg, nl_combis);
 900
 901         return 0;
 902 nla_put_failure:
 903         return -ENOBUFS;
 904 }
 905
 906 #ifdef CONFIG_PM
 907 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 908                                         struct sk_buff *msg)
 909 {
 910         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 911         struct nlattr *nl_tcp;
 912
 913         if (!tcp)
 914                 return 0;
 915
 916         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 917         if (!nl_tcp)
 918                 return -ENOBUFS;
 919
 920         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 921                         tcp->data_payload_max))
 922                 return -ENOBUFS;
 923
 924         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 925                         tcp->data_payload_max))
 926                 return -ENOBUFS;
 927
 928         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 929                 return -ENOBUFS;
 930
 931         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 932                                 sizeof(*tcp->tok), tcp->tok))
 933                 return -ENOBUFS;
 934
 935         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 936                         tcp->data_interval_max))
 937                 return -ENOBUFS;
 938
 939         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 940                         tcp->wake_payload_max))
 941                 return -ENOBUFS;
 942
 943         nla_nest_end(msg, nl_tcp);
 944         return 0;
 945 }
 946
 947 static int nl80211_send_wowlan(struct sk_buff *msg,
 948                                struct cfg80211_registered_device *dev,
 949                                bool large)
 950 {
 951         struct nlattr *nl_wowlan;
 952
 953         if (!dev->wiphy.wowlan)
 954                 return 0;
 955
 956         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 957         if (!nl_wowlan)
 958                 return -ENOBUFS;
 959
 960         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 961              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 962             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 963              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 964             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 965              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 966             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 967              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 968             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 969              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 970             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 971              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 972             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 973              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 974             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 975              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 976                 return -ENOBUFS;
 977
 978         if (dev->wiphy.wowlan->n_patterns) {
 979                 struct nl80211_wowlan_pattern_support pat = {
 980                         .max_patterns = dev->wiphy.wowlan->n_patterns,
 981                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
 982                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
 983                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
 984                 };
 985
 986                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 987                             sizeof(pat), &pat))
 988                         return -ENOBUFS;
 989         }
 990
 991         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
 992                 return -ENOBUFS;
 993
 994         nla_nest_end(msg, nl_wowlan);
 995
 996         return 0;
 997 }
 998 #endif
 999
1000 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1001                                       struct ieee80211_supported_band *sband)
1002 {
1003         struct nlattr *nl_rates, *nl_rate;
1004         struct ieee80211_rate *rate;
1005         int i;
1006
1007         /* add HT info */
1008         if (sband->ht_cap.ht_supported &&
1009             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1010                      sizeof(sband->ht_cap.mcs),
1011                      &sband->ht_cap.mcs) ||
1012              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1013                          sband->ht_cap.cap) ||
1014              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1015                         sband->ht_cap.ampdu_factor) ||
1016              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1017                         sband->ht_cap.ampdu_density)))
1018                 return -ENOBUFS;
1019
1020         /* add VHT info */
1021         if (sband->vht_cap.vht_supported &&
1022             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1023                      sizeof(sband->vht_cap.vht_mcs),
1024                      &sband->vht_cap.vht_mcs) ||
1025              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1026                          sband->vht_cap.cap)))
1027                 return -ENOBUFS;
1028
1029         /* add bitrates */
1030         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1031         if (!nl_rates)
1032                 return -ENOBUFS;
1033
1034         for (i = 0; i < sband->n_bitrates; i++) {
1035                 nl_rate = nla_nest_start(msg, i);
1036                 if (!nl_rate)
1037                         return -ENOBUFS;
1038
1039                 rate = &sband->bitrates[i];
1040                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1041                                 rate->bitrate))
1042                         return -ENOBUFS;
1043                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1044                     nla_put_flag(msg,
1045                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1046                         return -ENOBUFS;
1047
1048                 nla_nest_end(msg, nl_rate);
1049         }
1050
1051         nla_nest_end(msg, nl_rates);
1052
1053         return 0;
1054 }
1055
1056 static int
1057 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1058                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1059 {
1060         u16 stypes;
1061         struct nlattr *nl_ftypes, *nl_ifs;
1062         enum nl80211_iftype ift;
1063         int i;
1064
1065         if (!mgmt_stypes)
1066                 return 0;
1067
1068         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1069         if (!nl_ifs)
1070                 return -ENOBUFS;
1071
1072         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1073                 nl_ftypes = nla_nest_start(msg, ift);
1074                 if (!nl_ftypes)
1075                         return -ENOBUFS;
1076                 i = 0;
1077                 stypes = mgmt_stypes[ift].tx;
1078                 while (stypes) {
1079                         if ((stypes & 1) &&
1080                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1081                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1082                                 return -ENOBUFS;
1083                         stypes >>= 1;
1084                         i++;
1085                 }
1086                 nla_nest_end(msg, nl_ftypes);
1087         }
1088
1089         nla_nest_end(msg, nl_ifs);
1090
1091         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1092         if (!nl_ifs)
1093                 return -ENOBUFS;
1094
1095         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1096                 nl_ftypes = nla_nest_start(msg, ift);
1097                 if (!nl_ftypes)
1098                         return -ENOBUFS;
1099                 i = 0;
1100                 stypes = mgmt_stypes[ift].rx;
1101                 while (stypes) {
1102                         if ((stypes & 1) &&
1103                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1104                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1105                                 return -ENOBUFS;
1106                         stypes >>= 1;
1107                         i++;
1108                 }
1109                 nla_nest_end(msg, nl_ftypes);
1110         }
1111         nla_nest_end(msg, nl_ifs);
1112
1113         return 0;
1114 }
1115
1116 struct nl80211_dump_wiphy_state {
1117         s64 filter_wiphy;
1118         long start;
1119         long split_start, band_start, chan_start;
1120         bool split;
1121 };
1122
1123 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1124                               struct sk_buff *msg, u32 portid, u32 seq,
1125                               int flags, struct nl80211_dump_wiphy_state *state)
1126 {
1127         void *hdr;
1128         struct nlattr *nl_bands, *nl_band;
1129         struct nlattr *nl_freqs, *nl_freq;
1130         struct nlattr *nl_cmds;
1131         enum ieee80211_band band;
1132         struct ieee80211_channel *chan;
1133         int i;
1134         const struct ieee80211_txrx_stypes *mgmt_stypes =
1135                                 dev->wiphy.mgmt_stypes;
1136         u32 features;
1137
1138         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1139         if (!hdr)
1140                 return -ENOBUFS;
1141
1142         if (WARN_ON(!state))
1143                 return -EINVAL;
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 (state->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                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1195                     nla_put_flag(msg, WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1196                         goto nla_put_failure;
1197
1198                 state->split_start++;
1199                 if (state->split)
1200                         break;
1201         case 1:
1202                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1203                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1204                             dev->wiphy.cipher_suites))
1205                         goto nla_put_failure;
1206
1207                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1208                                dev->wiphy.max_num_pmkids))
1209                         goto nla_put_failure;
1210
1211                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1212                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1213                         goto nla_put_failure;
1214
1215                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1216                                 dev->wiphy.available_antennas_tx) ||
1217                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1218                                 dev->wiphy.available_antennas_rx))
1219                         goto nla_put_failure;
1220
1221                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1222                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1223                                 dev->wiphy.probe_resp_offload))
1224                         goto nla_put_failure;
1225
1226                 if ((dev->wiphy.available_antennas_tx ||
1227                      dev->wiphy.available_antennas_rx) &&
1228                     dev->ops->get_antenna) {
1229                         u32 tx_ant = 0, rx_ant = 0;
1230                         int res;
1231                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1232                         if (!res) {
1233                                 if (nla_put_u32(msg,
1234                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1235                                                 tx_ant) ||
1236                                     nla_put_u32(msg,
1237                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1238                                                 rx_ant))
1239                                         goto nla_put_failure;
1240                         }
1241                 }
1242
1243                 state->split_start++;
1244                 if (state->split)
1245                         break;
1246         case 2:
1247                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1248                                         dev->wiphy.interface_modes))
1249                                 goto nla_put_failure;
1250                 state->split_start++;
1251                 if (state->split)
1252                         break;
1253         case 3:
1254                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1255                 if (!nl_bands)
1256                         goto nla_put_failure;
1257
1258                 for (band = state->band_start;
1259                      band < IEEE80211_NUM_BANDS; band++) {
1260                         struct ieee80211_supported_band *sband;
1261
1262                         sband = dev->wiphy.bands[band];
1263
1264                         if (!sband)
1265                                 continue;
1266
1267                         nl_band = nla_nest_start(msg, band);
1268                         if (!nl_band)
1269                                 goto nla_put_failure;
1270
1271                         switch (state->chan_start) {
1272                         case 0:
1273                                 if (nl80211_send_band_rateinfo(msg, sband))
1274                                         goto nla_put_failure;
1275                                 state->chan_start++;
1276                                 if (state->split)
1277                                         break;
1278                         default:
1279                                 /* add frequencies */
1280                                 nl_freqs = nla_nest_start(
1281                                         msg, NL80211_BAND_ATTR_FREQS);
1282                                 if (!nl_freqs)
1283                                         goto nla_put_failure;
1284
1285                                 for (i = state->chan_start - 1;
1286                                      i < sband->n_channels;
1287                                      i++) {
1288                                         nl_freq = nla_nest_start(msg, i);
1289                                         if (!nl_freq)
1290                                                 goto nla_put_failure;
1291
1292                                         chan = &sband->channels[i];
1293
1294                                         if (nl80211_msg_put_channel(
1295                                                         msg, chan,
1296                                                         state->split))
1297                                                 goto nla_put_failure;
1298
1299                                         nla_nest_end(msg, nl_freq);
1300                                         if (state->split)
1301                                                 break;
1302                                 }
1303                                 if (i < sband->n_channels)
1304                                         state->chan_start = i + 2;
1305                                 else
1306                                         state->chan_start = 0;
1307                                 nla_nest_end(msg, nl_freqs);
1308                         }
1309
1310                         nla_nest_end(msg, nl_band);
1311
1312                         if (state->split) {
1313                                 /* start again here */
1314                                 if (state->chan_start)
1315                                         band--;
1316                                 break;
1317                         }
1318                 }
1319                 nla_nest_end(msg, nl_bands);
1320
1321                 if (band < IEEE80211_NUM_BANDS)
1322                         state->band_start = band + 1;
1323                 else
1324                         state->band_start = 0;
1325
1326                 /* if bands & channels are done, continue outside */
1327                 if (state->band_start == 0 && state->chan_start == 0)
1328                         state->split_start++;
1329                 if (state->split)
1330                         break;
1331         case 4:
1332                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1333                 if (!nl_cmds)
1334                         goto nla_put_failure;
1335
1336                 i = 0;
1337 #define CMD(op, n)                                                      \
1338                  do {                                                   \
1339                         if (dev->ops->op) {                             \
1340                                 i++;                                    \
1341                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1342                                         goto nla_put_failure;           \
1343                         }                                               \
1344                 } while (0)
1345
1346                 CMD(add_virtual_intf, NEW_INTERFACE);
1347                 CMD(change_virtual_intf, SET_INTERFACE);
1348                 CMD(add_key, NEW_KEY);
1349                 CMD(start_ap, START_AP);
1350                 CMD(add_station, NEW_STATION);
1351                 CMD(add_mpath, NEW_MPATH);
1352                 CMD(update_mesh_config, SET_MESH_CONFIG);
1353                 CMD(change_bss, SET_BSS);
1354                 CMD(auth, AUTHENTICATE);
1355                 CMD(assoc, ASSOCIATE);
1356                 CMD(deauth, DEAUTHENTICATE);
1357                 CMD(disassoc, DISASSOCIATE);
1358                 CMD(join_ibss, JOIN_IBSS);
1359                 CMD(join_mesh, JOIN_MESH);
1360                 CMD(set_pmksa, SET_PMKSA);
1361                 CMD(del_pmksa, DEL_PMKSA);
1362                 CMD(flush_pmksa, FLUSH_PMKSA);
1363                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1364                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1365                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1366                 CMD(mgmt_tx, FRAME);
1367                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1368                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1369                         i++;
1370                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1371                                 goto nla_put_failure;
1372                 }
1373                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1374                     dev->ops->join_mesh) {
1375                         i++;
1376                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1377                                 goto nla_put_failure;
1378                 }
1379                 CMD(set_wds_peer, SET_WDS_PEER);
1380                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1381                         CMD(tdls_mgmt, TDLS_MGMT);
1382                         CMD(tdls_oper, TDLS_OPER);
1383                 }
1384                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1385                         CMD(sched_scan_start, START_SCHED_SCAN);
1386                 CMD(probe_client, PROBE_CLIENT);
1387                 CMD(set_noack_map, SET_NOACK_MAP);
1388                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1389                         i++;
1390                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1391                                 goto nla_put_failure;
1392                 }
1393                 CMD(start_p2p_device, START_P2P_DEVICE);
1394                 CMD(set_mcast_rate, SET_MCAST_RATE);
1395                 if (state->split) {
1396                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1397                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1398                 }
1399
1400 #ifdef CONFIG_NL80211_TESTMODE
1401                 CMD(testmode_cmd, TESTMODE);
1402 #endif
1403
1404 #undef CMD
1405
1406                 if (dev->ops->connect || dev->ops->auth) {
1407                         i++;
1408                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1409                                 goto nla_put_failure;
1410                 }
1411
1412                 if (dev->ops->disconnect || dev->ops->deauth) {
1413                         i++;
1414                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1415                                 goto nla_put_failure;
1416                 }
1417
1418                 nla_nest_end(msg, nl_cmds);
1419                 state->split_start++;
1420                 if (state->split)
1421                         break;
1422         case 5:
1423                 if (dev->ops->remain_on_channel &&
1424                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1425                     nla_put_u32(msg,
1426                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1427                                 dev->wiphy.max_remain_on_channel_duration))
1428                         goto nla_put_failure;
1429
1430                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1431                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1432                         goto nla_put_failure;
1433
1434                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1435                         goto nla_put_failure;
1436                 state->split_start++;
1437                 if (state->split)
1438                         break;
1439         case 6:
1440 #ifdef CONFIG_PM
1441                 if (nl80211_send_wowlan(msg, dev, state->split))
1442                         goto nla_put_failure;
1443                 state->split_start++;
1444                 if (state->split)
1445                         break;
1446 #else
1447                 state->split_start++;
1448 #endif
1449         case 7:
1450                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1451                                         dev->wiphy.software_iftypes))
1452                         goto nla_put_failure;
1453
1454                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1455                                                    state->split))
1456                         goto nla_put_failure;
1457
1458                 state->split_start++;
1459                 if (state->split)
1460                         break;
1461         case 8:
1462                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1463                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1464                                 dev->wiphy.ap_sme_capa))
1465                         goto nla_put_failure;
1466
1467                 features = dev->wiphy.features;
1468                 /*
1469                  * We can only add the per-channel limit information if the
1470                  * dump is split, otherwise it makes it too big. Therefore
1471                  * only advertise it in that case.
1472                  */
1473                 if (state->split)
1474                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1475                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1476                         goto nla_put_failure;
1477
1478                 if (dev->wiphy.ht_capa_mod_mask &&
1479                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1480                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1481                             dev->wiphy.ht_capa_mod_mask))
1482                         goto nla_put_failure;
1483
1484                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1485                     dev->wiphy.max_acl_mac_addrs &&
1486                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1487                                 dev->wiphy.max_acl_mac_addrs))
1488                         goto nla_put_failure;
1489
1490                 /*
1491                  * Any information below this point is only available to
1492                  * applications that can deal with it being split. This
1493                  * helps ensure that newly added capabilities don't break
1494                  * older tools by overrunning their buffers.
1495                  *
1496                  * We still increment split_start so that in the split
1497                  * case we'll continue with more data in the next round,
1498                  * but break unconditionally so unsplit data stops here.
1499                  */
1500                 state->split_start++;
1501                 break;
1502         case 9:
1503                 if (dev->wiphy.extended_capabilities &&
1504                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1505                              dev->wiphy.extended_capabilities_len,
1506                              dev->wiphy.extended_capabilities) ||
1507                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1508                              dev->wiphy.extended_capabilities_len,
1509                              dev->wiphy.extended_capabilities_mask)))
1510                         goto nla_put_failure;
1511
1512                 if (dev->wiphy.vht_capa_mod_mask &&
1513                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1514                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1515                             dev->wiphy.vht_capa_mod_mask))
1516                         goto nla_put_failure;
1517
1518                 /* done */
1519                 state->split_start = 0;
1520                 break;
1521         }
1522         return genlmsg_end(msg, hdr);
1523
1524  nla_put_failure:
1525         genlmsg_cancel(msg, hdr);
1526         return -EMSGSIZE;
1527 }
1528
1529 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1530                                     struct netlink_callback *cb,
1531                                     struct nl80211_dump_wiphy_state *state)
1532 {
1533         struct nlattr **tb = nl80211_fam.attrbuf;
1534         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1535                               tb, nl80211_fam.maxattr, nl80211_policy);
1536         /* ignore parse errors for backward compatibility */
1537         if (ret)
1538                 return 0;
1539
1540         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1541         if (tb[NL80211_ATTR_WIPHY])
1542                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1543         if (tb[NL80211_ATTR_WDEV])
1544                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1545         if (tb[NL80211_ATTR_IFINDEX]) {
1546                 struct net_device *netdev;
1547                 struct cfg80211_registered_device *rdev;
1548                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1549
1550                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1551                 if (!netdev)
1552                         return -ENODEV;
1553                 if (netdev->ieee80211_ptr) {
1554                         rdev = wiphy_to_dev(
1555                                 netdev->ieee80211_ptr->wiphy);
1556                         state->filter_wiphy = rdev->wiphy_idx;
1557                 }
1558                 dev_put(netdev);
1559         }
1560
1561         return 0;
1562 }
1563
1564 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1565 {
1566         int idx = 0, ret;
1567         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1568         struct cfg80211_registered_device *dev;
1569
1570         rtnl_lock();
1571         if (!state) {
1572                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1573                 if (!state) {
1574                         rtnl_unlock();
1575                         return -ENOMEM;
1576                 }
1577                 state->filter_wiphy = -1;
1578                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1579                 if (ret) {
1580                         kfree(state);
1581                         rtnl_unlock();
1582                         return ret;
1583                 }
1584                 cb->args[0] = (long)state;
1585         }
1586
1587         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1588                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1589                         continue;
1590                 if (++idx <= state->start)
1591                         continue;
1592                 if (state->filter_wiphy != -1 &&
1593                     state->filter_wiphy != dev->wiphy_idx)
1594                         continue;
1595                 /* attempt to fit multiple wiphy data chunks into the skb */
1596                 do {
1597                         ret = nl80211_send_wiphy(dev, skb,
1598                                                  NETLINK_CB(cb->skb).portid,
1599                                                  cb->nlh->nlmsg_seq,
1600                                                  NLM_F_MULTI, state);
1601                         if (ret < 0) {
1602                                 /*
1603                                  * If sending the wiphy data didn't fit (ENOBUFS
1604                                  * or EMSGSIZE returned), this SKB is still
1605                                  * empty (so it's not too big because another
1606                                  * wiphy dataset is already in the skb) and
1607                                  * we've not tried to adjust the dump allocation
1608                                  * yet ... then adjust the alloc size to be
1609                                  * bigger, and return 1 but with the empty skb.
1610                                  * This results in an empty message being RX'ed
1611                                  * in userspace, but that is ignored.
1612                                  *
1613                                  * We can then retry with the larger buffer.
1614                                  */
1615                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1616                                     !skb->len &&
1617                                     cb->min_dump_alloc < 4096) {
1618                                         cb->min_dump_alloc = 4096;
1619                                         rtnl_unlock();
1620                                         return 1;
1621                                 }
1622                                 idx--;
1623                                 break;
1624                         }
1625                 } while (state->split_start > 0);
1626                 break;
1627         }
1628         rtnl_unlock();
1629
1630         state->start = idx;
1631
1632         return skb->len;
1633 }
1634
1635 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1636 {
1637         kfree((void *)cb->args[0]);
1638         return 0;
1639 }
1640
1641 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1642 {
1643         struct sk_buff *msg;
1644         struct cfg80211_registered_device *dev = info->user_ptr[0];
1645         struct nl80211_dump_wiphy_state state = {};
1646
1647         msg = nlmsg_new(4096, GFP_KERNEL);
1648         if (!msg)
1649                 return -ENOMEM;
1650
1651         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1652                                &state) < 0) {
1653                 nlmsg_free(msg);
1654                 return -ENOBUFS;
1655         }
1656
1657         return genlmsg_reply(msg, info);
1658 }
1659
1660 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1661         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1662         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1663         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1664         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1665         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1666 };
1667
1668 static int parse_txq_params(struct nlattr *tb[],
1669                             struct ieee80211_txq_params *txq_params)
1670 {
1671         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1672             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1673             !tb[NL80211_TXQ_ATTR_AIFS])
1674                 return -EINVAL;
1675
1676         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1677         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1678         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1679         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1680         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1681
1682         if (txq_params->ac >= NL80211_NUM_ACS)
1683                 return -EINVAL;
1684
1685         return 0;
1686 }
1687
1688 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1689 {
1690         /*
1691          * You can only set the channel explicitly for WDS interfaces,
1692          * all others have their channel managed via their respective
1693          * "establish a connection" command (connect, join, ...)
1694          *
1695          * For AP/GO and mesh mode, the channel can be set with the
1696          * channel userspace API, but is only stored and passed to the
1697          * low-level driver when the AP starts or the mesh is joined.
1698          * This is for backward compatibility, userspace can also give
1699          * the channel in the start-ap or join-mesh commands instead.
1700          *
1701          * Monitors are special as they are normally slaved to
1702          * whatever else is going on, so they have their own special
1703          * operation to set the monitor channel if possible.
1704          */
1705         return !wdev ||
1706                 wdev->iftype == NL80211_IFTYPE_AP ||
1707                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1708                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1709                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1710 }
1711
1712 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1713                                  struct genl_info *info,
1714                                  struct cfg80211_chan_def *chandef)
1715 {
1716         u32 control_freq;
1717
1718         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1719                 return -EINVAL;
1720
1721         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1722
1723         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1724         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1725         chandef->center_freq1 = control_freq;
1726         chandef->center_freq2 = 0;
1727
1728         /* Primary channel not allowed */
1729         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1730                 return -EINVAL;
1731
1732         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1733                 enum nl80211_channel_type chantype;
1734
1735                 chantype = nla_get_u32(
1736                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1737
1738                 switch (chantype) {
1739                 case NL80211_CHAN_NO_HT:
1740                 case NL80211_CHAN_HT20:
1741                 case NL80211_CHAN_HT40PLUS:
1742                 case NL80211_CHAN_HT40MINUS:
1743                         cfg80211_chandef_create(chandef, chandef->chan,
1744                                                 chantype);
1745                         break;
1746                 default:
1747                         return -EINVAL;
1748                 }
1749         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1750                 chandef->width =
1751                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1752                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1753                         chandef->center_freq1 =
1754                                 nla_get_u32(
1755                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1756                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1757                         chandef->center_freq2 =
1758                                 nla_get_u32(
1759                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1760         }
1761
1762         if (!cfg80211_chandef_valid(chandef))
1763                 return -EINVAL;
1764
1765         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1766                                      IEEE80211_CHAN_DISABLED))
1767                 return -EINVAL;
1768
1769         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1770              chandef->width == NL80211_CHAN_WIDTH_10) &&
1771             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1772                 return -EINVAL;
1773
1774         return 0;
1775 }
1776
1777 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1778                                  struct wireless_dev *wdev,
1779                                  struct genl_info *info)
1780 {
1781         struct cfg80211_chan_def chandef;
1782         int result;
1783         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1784
1785         if (wdev)
1786                 iftype = wdev->iftype;
1787
1788         if (!nl80211_can_set_dev_channel(wdev))
1789                 return -EOPNOTSUPP;
1790
1791         result = nl80211_parse_chandef(rdev, info, &chandef);
1792         if (result)
1793                 return result;
1794
1795         switch (iftype) {
1796         case NL80211_IFTYPE_AP:
1797         case NL80211_IFTYPE_P2P_GO:
1798                 if (wdev->beacon_interval) {
1799                         result = -EBUSY;
1800                         break;
1801                 }
1802                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1803                         result = -EINVAL;
1804                         break;
1805                 }
1806                 wdev->preset_chandef = chandef;
1807                 result = 0;
1808                 break;
1809         case NL80211_IFTYPE_MESH_POINT:
1810                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1811                 break;
1812         case NL80211_IFTYPE_MONITOR:
1813                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1814                 break;
1815         default:
1816                 result = -EINVAL;
1817         }
1818
1819         return result;
1820 }
1821
1822 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1823 {
1824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1825         struct net_device *netdev = info->user_ptr[1];
1826
1827         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1828 }
1829
1830 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1831 {
1832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1833         struct net_device *dev = info->user_ptr[1];
1834         struct wireless_dev *wdev = dev->ieee80211_ptr;
1835         const u8 *bssid;
1836
1837         if (!info->attrs[NL80211_ATTR_MAC])
1838                 return -EINVAL;
1839
1840         if (netif_running(dev))
1841                 return -EBUSY;
1842
1843         if (!rdev->ops->set_wds_peer)
1844                 return -EOPNOTSUPP;
1845
1846         if (wdev->iftype != NL80211_IFTYPE_WDS)
1847                 return -EOPNOTSUPP;
1848
1849         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1850         return rdev_set_wds_peer(rdev, dev, bssid);
1851 }
1852
1853
1854 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1855 {
1856         struct cfg80211_registered_device *rdev;
1857         struct net_device *netdev = NULL;
1858         struct wireless_dev *wdev;
1859         int result = 0, rem_txq_params = 0;
1860         struct nlattr *nl_txq_params;
1861         u32 changed;
1862         u8 retry_short = 0, retry_long = 0;
1863         u32 frag_threshold = 0, rts_threshold = 0;
1864         u8 coverage_class = 0;
1865
1866         ASSERT_RTNL();
1867
1868         /*
1869          * Try to find the wiphy and netdev. Normally this
1870          * function shouldn't need the netdev, but this is
1871          * done for backward compatibility -- previously
1872          * setting the channel was done per wiphy, but now
1873          * it is per netdev. Previous userland like hostapd
1874          * also passed a netdev to set_wiphy, so that it is
1875          * possible to let that go to the right netdev!
1876          */
1877
1878         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1879                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1880
1881                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1882                 if (netdev && netdev->ieee80211_ptr)
1883                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1884                 else
1885                         netdev = NULL;
1886         }
1887
1888         if (!netdev) {
1889                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1890                                                   info->attrs);
1891                 if (IS_ERR(rdev))
1892                         return PTR_ERR(rdev);
1893                 wdev = NULL;
1894                 netdev = NULL;
1895                 result = 0;
1896         } else
1897                 wdev = netdev->ieee80211_ptr;
1898
1899         /*
1900          * end workaround code, by now the rdev is available
1901          * and locked, and wdev may or may not be NULL.
1902          */
1903
1904         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1905                 result = cfg80211_dev_rename(
1906                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1907
1908         if (result)
1909                 goto bad_res;
1910
1911         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1912                 struct ieee80211_txq_params txq_params;
1913                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1914
1915                 if (!rdev->ops->set_txq_params) {
1916                         result = -EOPNOTSUPP;
1917                         goto bad_res;
1918                 }
1919
1920                 if (!netdev) {
1921                         result = -EINVAL;
1922                         goto bad_res;
1923                 }
1924
1925                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1926                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1927                         result = -EINVAL;
1928                         goto bad_res;
1929                 }
1930
1931                 if (!netif_running(netdev)) {
1932                         result = -ENETDOWN;
1933                         goto bad_res;
1934                 }
1935
1936                 nla_for_each_nested(nl_txq_params,
1937                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1938                                     rem_txq_params) {
1939                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1940                                   nla_data(nl_txq_params),
1941                                   nla_len(nl_txq_params),
1942                                   txq_params_policy);
1943                         result = parse_txq_params(tb, &txq_params);
1944                         if (result)
1945                                 goto bad_res;
1946
1947                         result = rdev_set_txq_params(rdev, netdev,
1948                                                      &txq_params);
1949                         if (result)
1950                                 goto bad_res;
1951                 }
1952         }
1953
1954         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1955                 result = __nl80211_set_channel(rdev,
1956                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1957                                 info);
1958                 if (result)
1959                         goto bad_res;
1960         }
1961
1962         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1963                 struct wireless_dev *txp_wdev = wdev;
1964                 enum nl80211_tx_power_setting type;
1965                 int idx, mbm = 0;
1966
1967                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1968                         txp_wdev = NULL;
1969
1970                 if (!rdev->ops->set_tx_power) {
1971                         result = -EOPNOTSUPP;
1972                         goto bad_res;
1973                 }
1974
1975                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1976                 type = nla_get_u32(info->attrs[idx]);
1977
1978                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1979                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1980                         result = -EINVAL;
1981                         goto bad_res;
1982                 }
1983
1984                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1985                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1986                         mbm = nla_get_u32(info->attrs[idx]);
1987                 }
1988
1989                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1990                 if (result)
1991                         goto bad_res;
1992         }
1993
1994         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1995             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1996                 u32 tx_ant, rx_ant;
1997                 if ((!rdev->wiphy.available_antennas_tx &&
1998                      !rdev->wiphy.available_antennas_rx) ||
1999                     !rdev->ops->set_antenna) {
2000                         result = -EOPNOTSUPP;
2001                         goto bad_res;
2002                 }
2003
2004                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2005                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2006
2007                 /* reject antenna configurations which don't match the
2008                  * available antenna masks, except for the "all" mask */
2009                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2010                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2011                         result = -EINVAL;
2012                         goto bad_res;
2013                 }
2014
2015                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2016                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2017
2018                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2019                 if (result)
2020                         goto bad_res;
2021         }
2022
2023         changed = 0;
2024
2025         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2026                 retry_short = nla_get_u8(
2027                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2028                 if (retry_short == 0) {
2029                         result = -EINVAL;
2030                         goto bad_res;
2031                 }
2032                 changed |= WIPHY_PARAM_RETRY_SHORT;
2033         }
2034
2035         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2036                 retry_long = nla_get_u8(
2037                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2038                 if (retry_long == 0) {
2039                         result = -EINVAL;
2040                         goto bad_res;
2041                 }
2042                 changed |= WIPHY_PARAM_RETRY_LONG;
2043         }
2044
2045         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2046                 frag_threshold = nla_get_u32(
2047                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2048                 if (frag_threshold < 256) {
2049                         result = -EINVAL;
2050                         goto bad_res;
2051                 }
2052                 if (frag_threshold != (u32) -1) {
2053                         /*
2054                          * Fragments (apart from the last one) are required to
2055                          * have even length. Make the fragmentation code
2056                          * simpler by stripping LSB should someone try to use
2057                          * odd threshold value.
2058                          */
2059                         frag_threshold &= ~0x1;
2060                 }
2061                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2062         }
2063
2064         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2065                 rts_threshold = nla_get_u32(
2066                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2067                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2068         }
2069
2070         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2071                 coverage_class = nla_get_u8(
2072                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2073                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2074         }
2075
2076         if (changed) {
2077                 u8 old_retry_short, old_retry_long;
2078                 u32 old_frag_threshold, old_rts_threshold;
2079                 u8 old_coverage_class;
2080
2081                 if (!rdev->ops->set_wiphy_params) {
2082                         result = -EOPNOTSUPP;
2083                         goto bad_res;
2084                 }
2085
2086                 old_retry_short = rdev->wiphy.retry_short;
2087                 old_retry_long = rdev->wiphy.retry_long;
2088                 old_frag_threshold = rdev->wiphy.frag_threshold;
2089                 old_rts_threshold = rdev->wiphy.rts_threshold;
2090                 old_coverage_class = rdev->wiphy.coverage_class;
2091
2092                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2093                         rdev->wiphy.retry_short = retry_short;
2094                 if (changed & WIPHY_PARAM_RETRY_LONG)
2095                         rdev->wiphy.retry_long = retry_long;
2096                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2097                         rdev->wiphy.frag_threshold = frag_threshold;
2098                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2099                         rdev->wiphy.rts_threshold = rts_threshold;
2100                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2101                         rdev->wiphy.coverage_class = coverage_class;
2102
2103                 result = rdev_set_wiphy_params(rdev, changed);
2104                 if (result) {
2105                         rdev->wiphy.retry_short = old_retry_short;
2106                         rdev->wiphy.retry_long = old_retry_long;
2107                         rdev->wiphy.frag_threshold = old_frag_threshold;
2108                         rdev->wiphy.rts_threshold = old_rts_threshold;
2109                         rdev->wiphy.coverage_class = old_coverage_class;
2110                 }
2111         }
2112
2113  bad_res:
2114         if (netdev)
2115                 dev_put(netdev);
2116         return result;
2117 }
2118
2119 static inline u64 wdev_id(struct wireless_dev *wdev)
2120 {
2121         return (u64)wdev->identifier |
2122                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2123 }
2124
2125 static int nl80211_send_chandef(struct sk_buff *msg,
2126                                  struct cfg80211_chan_def *chandef)
2127 {
2128         WARN_ON(!cfg80211_chandef_valid(chandef));
2129
2130         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2131                         chandef->chan->center_freq))
2132                 return -ENOBUFS;
2133         switch (chandef->width) {
2134         case NL80211_CHAN_WIDTH_20_NOHT:
2135         case NL80211_CHAN_WIDTH_20:
2136         case NL80211_CHAN_WIDTH_40:
2137                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2138                                 cfg80211_get_chandef_type(chandef)))
2139                         return -ENOBUFS;
2140                 break;
2141         default:
2142                 break;
2143         }
2144         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2145                 return -ENOBUFS;
2146         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2147                 return -ENOBUFS;
2148         if (chandef->center_freq2 &&
2149             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2150                 return -ENOBUFS;
2151         return 0;
2152 }
2153
2154 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2155                               struct cfg80211_registered_device *rdev,
2156                               struct wireless_dev *wdev)
2157 {
2158         struct net_device *dev = wdev->netdev;
2159         void *hdr;
2160
2161         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2162         if (!hdr)
2163                 return -1;
2164
2165         if (dev &&
2166             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2167              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2168                 goto nla_put_failure;
2169
2170         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2171             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2172             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2173             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2174             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2175                         rdev->devlist_generation ^
2176                         (cfg80211_rdev_list_generation << 2)))
2177                 goto nla_put_failure;
2178
2179         if (rdev->ops->get_channel) {
2180                 int ret;
2181                 struct cfg80211_chan_def chandef;
2182
2183                 ret = rdev_get_channel(rdev, wdev, &chandef);
2184                 if (ret == 0) {
2185                         if (nl80211_send_chandef(msg, &chandef))
2186                                 goto nla_put_failure;
2187                 }
2188         }
2189
2190         if (wdev->ssid_len) {
2191                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2192                         goto nla_put_failure;
2193         }
2194
2195         return genlmsg_end(msg, hdr);
2196
2197  nla_put_failure:
2198         genlmsg_cancel(msg, hdr);
2199         return -EMSGSIZE;
2200 }
2201
2202 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2203 {
2204         int wp_idx = 0;
2205         int if_idx = 0;
2206         int wp_start = cb->args[0];
2207         int if_start = cb->args[1];
2208         struct cfg80211_registered_device *rdev;
2209         struct wireless_dev *wdev;
2210
2211         rtnl_lock();
2212         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2213                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2214                         continue;
2215                 if (wp_idx < wp_start) {
2216                         wp_idx++;
2217                         continue;
2218                 }
2219                 if_idx = 0;
2220
2221                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2222                         if (if_idx < if_start) {
2223                                 if_idx++;
2224                                 continue;
2225                         }
2226                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2227                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2228                                                rdev, wdev) < 0) {
2229                                 goto out;
2230                         }
2231                         if_idx++;
2232                 }
2233
2234                 wp_idx++;
2235         }
2236  out:
2237         rtnl_unlock();
2238
2239         cb->args[0] = wp_idx;
2240         cb->args[1] = if_idx;
2241
2242         return skb->len;
2243 }
2244
2245 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2246 {
2247         struct sk_buff *msg;
2248         struct cfg80211_registered_device *dev = info->user_ptr[0];
2249         struct wireless_dev *wdev = info->user_ptr[1];
2250
2251         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2252         if (!msg)
2253                 return -ENOMEM;
2254
2255         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2256                                dev, wdev) < 0) {
2257                 nlmsg_free(msg);
2258                 return -ENOBUFS;
2259         }
2260
2261         return genlmsg_reply(msg, info);
2262 }
2263
2264 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2265         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2266         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2267         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2268         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2269         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2270         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2271 };
2272
2273 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2274 {
2275         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2276         int flag;
2277
2278         *mntrflags = 0;
2279
2280         if (!nla)
2281                 return -EINVAL;
2282
2283         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2284                              nla, mntr_flags_policy))
2285                 return -EINVAL;
2286
2287         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2288                 if (flags[flag])
2289                         *mntrflags |= (1<<flag);
2290
2291         return 0;
2292 }
2293
2294 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2295                                struct net_device *netdev, u8 use_4addr,
2296                                enum nl80211_iftype iftype)
2297 {
2298         if (!use_4addr) {
2299                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2300                         return -EBUSY;
2301                 return 0;
2302         }
2303
2304         switch (iftype) {
2305         case NL80211_IFTYPE_AP_VLAN:
2306                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2307                         return 0;
2308                 break;
2309         case NL80211_IFTYPE_STATION:
2310                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2311                         return 0;
2312                 break;
2313         default:
2314                 break;
2315         }
2316
2317         return -EOPNOTSUPP;
2318 }
2319
2320 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2321 {
2322         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2323         struct vif_params params;
2324         int err;
2325         enum nl80211_iftype otype, ntype;
2326         struct net_device *dev = info->user_ptr[1];
2327         u32 _flags, *flags = NULL;
2328         bool change = false;
2329
2330         memset(&params, 0, sizeof(params));
2331
2332         otype = ntype = dev->ieee80211_ptr->iftype;
2333
2334         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2335                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2336                 if (otype != ntype)
2337                         change = true;
2338                 if (ntype > NL80211_IFTYPE_MAX)
2339                         return -EINVAL;
2340         }
2341
2342         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2343                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2344
2345                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2346                         return -EINVAL;
2347                 if (netif_running(dev))
2348                         return -EBUSY;
2349
2350                 wdev_lock(wdev);
2351                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2352                              IEEE80211_MAX_MESH_ID_LEN);
2353                 wdev->mesh_id_up_len =
2354                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2355                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2356                        wdev->mesh_id_up_len);
2357                 wdev_unlock(wdev);
2358         }
2359
2360         if (info->attrs[NL80211_ATTR_4ADDR]) {
2361                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2362                 change = true;
2363                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2364                 if (err)
2365                         return err;
2366         } else {
2367                 params.use_4addr = -1;
2368         }
2369
2370         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2371                 if (ntype != NL80211_IFTYPE_MONITOR)
2372                         return -EINVAL;
2373                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2374                                           &_flags);
2375                 if (err)
2376                         return err;
2377
2378                 flags = &_flags;
2379                 change = true;
2380         }
2381
2382         if (flags && (*flags & NL80211_MNTR_FLAG_ACTIVE) &&
2383             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2384                 return -EOPNOTSUPP;
2385
2386         if (change)
2387                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2388         else
2389                 err = 0;
2390
2391         if (!err && params.use_4addr != -1)
2392                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2393
2394         return err;
2395 }
2396
2397 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2398 {
2399         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2400         struct vif_params params;
2401         struct wireless_dev *wdev;
2402         struct sk_buff *msg;
2403         int err;
2404         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2405         u32 flags;
2406
2407         memset(&params, 0, sizeof(params));
2408
2409         if (!info->attrs[NL80211_ATTR_IFNAME])
2410                 return -EINVAL;
2411
2412         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2413                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2414                 if (type > NL80211_IFTYPE_MAX)
2415                         return -EINVAL;
2416         }
2417
2418         if (!rdev->ops->add_virtual_intf ||
2419             !(rdev->wiphy.interface_modes & (1 << type)))
2420                 return -EOPNOTSUPP;
2421
2422         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2423                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2424                            ETH_ALEN);
2425                 if (!is_valid_ether_addr(params.macaddr))
2426                         return -EADDRNOTAVAIL;
2427         }
2428
2429         if (info->attrs[NL80211_ATTR_4ADDR]) {
2430                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2431                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2432                 if (err)
2433                         return err;
2434         }
2435
2436         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2437         if (!msg)
2438                 return -ENOMEM;
2439
2440         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2441                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2442                                   &flags);
2443
2444         if (!err && (flags & NL80211_MNTR_FLAG_ACTIVE) &&
2445             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2446                 return -EOPNOTSUPP;
2447
2448         wdev = rdev_add_virtual_intf(rdev,
2449                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2450                                 type, err ? NULL : &flags, &params);
2451         if (IS_ERR(wdev)) {
2452                 nlmsg_free(msg);
2453                 return PTR_ERR(wdev);
2454         }
2455
2456         switch (type) {
2457         case NL80211_IFTYPE_MESH_POINT:
2458                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2459                         break;
2460                 wdev_lock(wdev);
2461                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2462                              IEEE80211_MAX_MESH_ID_LEN);
2463                 wdev->mesh_id_up_len =
2464                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2465                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2466                        wdev->mesh_id_up_len);
2467                 wdev_unlock(wdev);
2468                 break;
2469         case NL80211_IFTYPE_P2P_DEVICE:
2470                 /*
2471                  * P2P Device doesn't have a netdev, so doesn't go
2472                  * through the netdev notifier and must be added here
2473                  */
2474                 mutex_init(&wdev->mtx);
2475                 INIT_LIST_HEAD(&wdev->event_list);
2476                 spin_lock_init(&wdev->event_lock);
2477                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2478                 spin_lock_init(&wdev->mgmt_registrations_lock);
2479
2480                 wdev->identifier = ++rdev->wdev_id;
2481                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2482                 rdev->devlist_generation++;
2483                 break;
2484         default:
2485                 break;
2486         }
2487
2488         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2489                                rdev, wdev) < 0) {
2490                 nlmsg_free(msg);
2491                 return -ENOBUFS;
2492         }
2493
2494         return genlmsg_reply(msg, info);
2495 }
2496
2497 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2498 {
2499         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2500         struct wireless_dev *wdev = info->user_ptr[1];
2501
2502         if (!rdev->ops->del_virtual_intf)
2503                 return -EOPNOTSUPP;
2504
2505         /*
2506          * If we remove a wireless device without a netdev then clear
2507          * user_ptr[1] so that nl80211_post_doit won't dereference it
2508          * to check if it needs to do dev_put(). Otherwise it crashes
2509          * since the wdev has been freed, unlike with a netdev where
2510          * we need the dev_put() for the netdev to really be freed.
2511          */
2512         if (!wdev->netdev)
2513                 info->user_ptr[1] = NULL;
2514
2515         return rdev_del_virtual_intf(rdev, wdev);
2516 }
2517
2518 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2519 {
2520         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2521         struct net_device *dev = info->user_ptr[1];
2522         u16 noack_map;
2523
2524         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2525                 return -EINVAL;
2526
2527         if (!rdev->ops->set_noack_map)
2528                 return -EOPNOTSUPP;
2529
2530         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2531
2532         return rdev_set_noack_map(rdev, dev, noack_map);
2533 }
2534
2535 struct get_key_cookie {
2536         struct sk_buff *msg;
2537         int error;
2538         int idx;
2539 };
2540
2541 static void get_key_callback(void *c, struct key_params *params)
2542 {
2543         struct nlattr *key;
2544         struct get_key_cookie *cookie = c;
2545
2546         if ((params->key &&
2547              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2548                      params->key_len, params->key)) ||
2549             (params->seq &&
2550              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2551                      params->seq_len, params->seq)) ||
2552             (params->cipher &&
2553              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2554                          params->cipher)))
2555                 goto nla_put_failure;
2556
2557         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2558         if (!key)
2559                 goto nla_put_failure;
2560
2561         if ((params->key &&
2562              nla_put(cookie->msg, NL80211_KEY_DATA,
2563                      params->key_len, params->key)) ||
2564             (params->seq &&
2565              nla_put(cookie->msg, NL80211_KEY_SEQ,
2566                      params->seq_len, params->seq)) ||
2567             (params->cipher &&
2568              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2569                          params->cipher)))
2570                 goto nla_put_failure;
2571
2572         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2573                 goto nla_put_failure;
2574
2575         nla_nest_end(cookie->msg, key);
2576
2577         return;
2578  nla_put_failure:
2579         cookie->error = 1;
2580 }
2581
2582 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2583 {
2584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2585         int err;
2586         struct net_device *dev = info->user_ptr[1];
2587         u8 key_idx = 0;
2588         const u8 *mac_addr = NULL;
2589         bool pairwise;
2590         struct get_key_cookie cookie = {
2591                 .error = 0,
2592         };
2593         void *hdr;
2594         struct sk_buff *msg;
2595
2596         if (info->attrs[NL80211_ATTR_KEY_IDX])
2597                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2598
2599         if (key_idx > 5)
2600                 return -EINVAL;
2601
2602         if (info->attrs[NL80211_ATTR_MAC])
2603                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2604
2605         pairwise = !!mac_addr;
2606         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2607                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2608                 if (kt >= NUM_NL80211_KEYTYPES)
2609                         return -EINVAL;
2610                 if (kt != NL80211_KEYTYPE_GROUP &&
2611                     kt != NL80211_KEYTYPE_PAIRWISE)
2612                         return -EINVAL;
2613                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2614         }
2615
2616         if (!rdev->ops->get_key)
2617                 return -EOPNOTSUPP;
2618
2619         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2620         if (!msg)
2621                 return -ENOMEM;
2622
2623         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2624                              NL80211_CMD_NEW_KEY);
2625         if (!hdr)
2626                 return -ENOBUFS;
2627
2628         cookie.msg = msg;
2629         cookie.idx = key_idx;
2630
2631         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2632             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2633                 goto nla_put_failure;
2634         if (mac_addr &&
2635             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2636                 goto nla_put_failure;
2637
2638         if (pairwise && mac_addr &&
2639             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2640                 return -ENOENT;
2641
2642         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2643                            get_key_callback);
2644
2645         if (err)
2646                 goto free_msg;
2647
2648         if (cookie.error)
2649                 goto nla_put_failure;
2650
2651         genlmsg_end(msg, hdr);
2652         return genlmsg_reply(msg, info);
2653
2654  nla_put_failure:
2655         err = -ENOBUFS;
2656  free_msg:
2657         nlmsg_free(msg);
2658         return err;
2659 }
2660
2661 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2662 {
2663         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2664         struct key_parse key;
2665         int err;
2666         struct net_device *dev = info->user_ptr[1];
2667
2668         err = nl80211_parse_key(info, &key);
2669         if (err)
2670                 return err;
2671
2672         if (key.idx < 0)
2673                 return -EINVAL;
2674
2675         /* only support setting default key */
2676         if (!key.def && !key.defmgmt)
2677                 return -EINVAL;
2678
2679         wdev_lock(dev->ieee80211_ptr);
2680
2681         if (key.def) {
2682                 if (!rdev->ops->set_default_key) {
2683                         err = -EOPNOTSUPP;
2684                         goto out;
2685                 }
2686
2687                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2688                 if (err)
2689                         goto out;
2690
2691                 err = rdev_set_default_key(rdev, dev, key.idx,
2692                                                  key.def_uni, key.def_multi);
2693
2694                 if (err)
2695                         goto out;
2696
2697 #ifdef CONFIG_CFG80211_WEXT
2698                 dev->ieee80211_ptr->wext.default_key = key.idx;
2699 #endif
2700         } else {
2701                 if (key.def_uni || !key.def_multi) {
2702                         err = -EINVAL;
2703                         goto out;
2704                 }
2705
2706                 if (!rdev->ops->set_default_mgmt_key) {
2707                         err = -EOPNOTSUPP;
2708                         goto out;
2709                 }
2710
2711                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2712                 if (err)
2713                         goto out;
2714
2715                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2716                 if (err)
2717                         goto out;
2718
2719 #ifdef CONFIG_CFG80211_WEXT
2720                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2721 #endif
2722         }
2723
2724  out:
2725         wdev_unlock(dev->ieee80211_ptr);
2726
2727         return err;
2728 }
2729
2730 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2731 {
2732         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2733         int err;
2734         struct net_device *dev = info->user_ptr[1];
2735         struct key_parse key;
2736         const u8 *mac_addr = NULL;
2737
2738         err = nl80211_parse_key(info, &key);
2739         if (err)
2740                 return err;
2741
2742         if (!key.p.key)
2743                 return -EINVAL;
2744
2745         if (info->attrs[NL80211_ATTR_MAC])
2746                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2747
2748         if (key.type == -1) {
2749                 if (mac_addr)
2750                         key.type = NL80211_KEYTYPE_PAIRWISE;
2751                 else
2752                         key.type = NL80211_KEYTYPE_GROUP;
2753         }
2754
2755         /* for now */
2756         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2757             key.type != NL80211_KEYTYPE_GROUP)
2758                 return -EINVAL;
2759
2760         if (!rdev->ops->add_key)
2761                 return -EOPNOTSUPP;
2762
2763         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2764                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2765                                            mac_addr))
2766                 return -EINVAL;
2767
2768         wdev_lock(dev->ieee80211_ptr);
2769         err = nl80211_key_allowed(dev->ieee80211_ptr);
2770         if (!err)
2771                 err = rdev_add_key(rdev, dev, key.idx,
2772                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2773                                     mac_addr, &key.p);
2774         wdev_unlock(dev->ieee80211_ptr);
2775
2776         return err;
2777 }
2778
2779 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2780 {
2781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2782         int err;
2783         struct net_device *dev = info->user_ptr[1];
2784         u8 *mac_addr = NULL;
2785         struct key_parse key;
2786
2787         err = nl80211_parse_key(info, &key);
2788         if (err)
2789                 return err;
2790
2791         if (info->attrs[NL80211_ATTR_MAC])
2792                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2793
2794         if (key.type == -1) {
2795                 if (mac_addr)
2796                         key.type = NL80211_KEYTYPE_PAIRWISE;
2797                 else
2798                         key.type = NL80211_KEYTYPE_GROUP;
2799         }
2800
2801         /* for now */
2802         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2803             key.type != NL80211_KEYTYPE_GROUP)
2804                 return -EINVAL;
2805
2806         if (!rdev->ops->del_key)
2807                 return -EOPNOTSUPP;
2808
2809         wdev_lock(dev->ieee80211_ptr);
2810         err = nl80211_key_allowed(dev->ieee80211_ptr);
2811
2812         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2813             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2814                 err = -ENOENT;
2815
2816         if (!err)
2817                 err = rdev_del_key(rdev, dev, key.idx,
2818                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2819                                    mac_addr);
2820
2821 #ifdef CONFIG_CFG80211_WEXT
2822         if (!err) {
2823                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2824                         dev->ieee80211_ptr->wext.default_key = -1;
2825                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2826                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2827         }
2828 #endif
2829         wdev_unlock(dev->ieee80211_ptr);
2830
2831         return err;
2832 }
2833
2834 /* This function returns an error or the number of nested attributes */
2835 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2836 {
2837         struct nlattr *attr;
2838         int n_entries = 0, tmp;
2839
2840         nla_for_each_nested(attr, nl_attr, tmp) {
2841                 if (nla_len(attr) != ETH_ALEN)
2842                         return -EINVAL;
2843
2844                 n_entries++;
2845         }
2846
2847         return n_entries;
2848 }
2849
2850 /*
2851  * This function parses ACL information and allocates memory for ACL data.
2852  * On successful return, the calling function is responsible to free the
2853  * ACL buffer returned by this function.
2854  */
2855 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2856                                                 struct genl_info *info)
2857 {
2858         enum nl80211_acl_policy acl_policy;
2859         struct nlattr *attr;
2860         struct cfg80211_acl_data *acl;
2861         int i = 0, n_entries, tmp;
2862
2863         if (!wiphy->max_acl_mac_addrs)
2864                 return ERR_PTR(-EOPNOTSUPP);
2865
2866         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2867                 return ERR_PTR(-EINVAL);
2868
2869         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2870         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2871             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2872                 return ERR_PTR(-EINVAL);
2873
2874         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2875                 return ERR_PTR(-EINVAL);
2876
2877         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2878         if (n_entries < 0)
2879                 return ERR_PTR(n_entries);
2880
2881         if (n_entries > wiphy->max_acl_mac_addrs)
2882                 return ERR_PTR(-ENOTSUPP);
2883
2884         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2885                       GFP_KERNEL);
2886         if (!acl)
2887                 return ERR_PTR(-ENOMEM);
2888
2889         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2890                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2891                 i++;
2892         }
2893
2894         acl->n_acl_entries = n_entries;
2895         acl->acl_policy = acl_policy;
2896
2897         return acl;
2898 }
2899
2900 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2901 {
2902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2903         struct net_device *dev = info->user_ptr[1];
2904         struct cfg80211_acl_data *acl;
2905         int err;
2906
2907         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2908             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2909                 return -EOPNOTSUPP;
2910
2911         if (!dev->ieee80211_ptr->beacon_interval)
2912                 return -EINVAL;
2913
2914         acl = parse_acl_data(&rdev->wiphy, info);
2915         if (IS_ERR(acl))
2916                 return PTR_ERR(acl);
2917
2918         err = rdev_set_mac_acl(rdev, dev, acl);
2919
2920         kfree(acl);
2921
2922         return err;
2923 }
2924
2925 static int nl80211_parse_beacon(struct nlattr *attrs[],
2926                                 struct cfg80211_beacon_data *bcn)
2927 {
2928         bool haveinfo = false;
2929
2930         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
2931             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
2932             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2933             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2934                 return -EINVAL;
2935
2936         memset(bcn, 0, sizeof(*bcn));
2937
2938         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
2939                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
2940                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
2941                 if (!bcn->head_len)
2942                         return -EINVAL;
2943                 haveinfo = true;
2944         }
2945
2946         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
2947                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
2948                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
2949                 haveinfo = true;
2950         }
2951
2952         if (!haveinfo)
2953                 return -EINVAL;
2954
2955         if (attrs[NL80211_ATTR_IE]) {
2956                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
2957                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
2958         }
2959
2960         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2961                 bcn->proberesp_ies =
2962                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
2963                 bcn->proberesp_ies_len =
2964                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
2965         }
2966
2967         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2968                 bcn->assocresp_ies =
2969                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2970                 bcn->assocresp_ies_len =
2971                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2972         }
2973
2974         if (attrs[NL80211_ATTR_PROBE_RESP]) {
2975                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
2976                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
2977         }
2978
2979         return 0;
2980 }
2981
2982 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2983                                    struct cfg80211_ap_settings *params)
2984 {
2985         struct wireless_dev *wdev;
2986         bool ret = false;
2987
2988         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2989                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2990                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2991                         continue;
2992
2993                 if (!wdev->preset_chandef.chan)
2994                         continue;
2995
2996                 params->chandef = wdev->preset_chandef;
2997                 ret = true;
2998                 break;
2999         }
3000
3001         return ret;
3002 }
3003
3004 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3005                                     enum nl80211_auth_type auth_type,
3006                                     enum nl80211_commands cmd)
3007 {
3008         if (auth_type > NL80211_AUTHTYPE_MAX)
3009                 return false;
3010
3011         switch (cmd) {
3012         case NL80211_CMD_AUTHENTICATE:
3013                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3014                     auth_type == NL80211_AUTHTYPE_SAE)
3015                         return false;
3016                 return true;
3017         case NL80211_CMD_CONNECT:
3018         case NL80211_CMD_START_AP:
3019                 /* SAE not supported yet */
3020                 if (auth_type == NL80211_AUTHTYPE_SAE)
3021                         return false;
3022                 return true;
3023         default:
3024                 return false;
3025         }
3026 }
3027
3028 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3029 {
3030         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3031         struct net_device *dev = info->user_ptr[1];
3032         struct wireless_dev *wdev = dev->ieee80211_ptr;
3033         struct cfg80211_ap_settings params;
3034         int err;
3035         u8 radar_detect_width = 0;
3036
3037         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3038             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3039                 return -EOPNOTSUPP;
3040
3041         if (!rdev->ops->start_ap)
3042                 return -EOPNOTSUPP;
3043
3044         if (wdev->beacon_interval)
3045                 return -EALREADY;
3046
3047         memset(&params, 0, sizeof(params));
3048
3049         /* these are required for START_AP */
3050         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3051             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3052             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3053                 return -EINVAL;
3054
3055         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3056         if (err)
3057                 return err;
3058
3059         params.beacon_interval =
3060                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3061         params.dtim_period =
3062                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3063
3064         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3065         if (err)
3066                 return err;
3067
3068         /*
3069          * In theory, some of these attributes should be required here
3070          * but since they were not used when the command was originally
3071          * added, keep them optional for old user space programs to let
3072          * them continue to work with drivers that do not need the
3073          * additional information -- drivers must check!
3074          */
3075         if (info->attrs[NL80211_ATTR_SSID]) {
3076                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3077                 params.ssid_len =
3078                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3079                 if (params.ssid_len == 0 ||
3080                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3081                         return -EINVAL;
3082         }
3083
3084         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3085                 params.hidden_ssid = nla_get_u32(
3086                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3087                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3088                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3089                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3090                         return -EINVAL;
3091         }
3092
3093         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3094
3095         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3096                 params.auth_type = nla_get_u32(
3097                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3098                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3099                                              NL80211_CMD_START_AP))
3100                         return -EINVAL;
3101         } else
3102                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3103
3104         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3105                                       NL80211_MAX_NR_CIPHER_SUITES);
3106         if (err)
3107                 return err;
3108
3109         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3110                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3111                         return -EOPNOTSUPP;
3112                 params.inactivity_timeout = nla_get_u16(
3113                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3114         }
3115
3116         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3117                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3118                         return -EINVAL;
3119                 params.p2p_ctwindow =
3120                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3121                 if (params.p2p_ctwindow > 127)
3122                         return -EINVAL;
3123                 if (params.p2p_ctwindow != 0 &&
3124                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3125                         return -EINVAL;
3126         }
3127
3128         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3129                 u8 tmp;
3130
3131                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3132                         return -EINVAL;
3133                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3134                 if (tmp > 1)
3135                         return -EINVAL;
3136                 params.p2p_opp_ps = tmp;
3137                 if (params.p2p_opp_ps != 0 &&
3138                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3139                         return -EINVAL;
3140         }
3141
3142         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3143                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3144                 if (err)
3145                         return err;
3146         } else if (wdev->preset_chandef.chan) {
3147                 params.chandef = wdev->preset_chandef;
3148         } else if (!nl80211_get_ap_channel(rdev, &params))
3149                 return -EINVAL;
3150
3151         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3152                 return -EINVAL;
3153
3154         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3155         if (err < 0)
3156                 return err;
3157         if (err) {
3158                 radar_detect_width = BIT(params.chandef.width);
3159                 params.radar_required = true;
3160         }
3161
3162         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3163                                            params.chandef.chan,
3164                                            CHAN_MODE_SHARED,
3165                                            radar_detect_width);
3166         if (err)
3167                 return err;
3168
3169         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3170                 params.acl = parse_acl_data(&rdev->wiphy, info);
3171                 if (IS_ERR(params.acl))
3172                         return PTR_ERR(params.acl);
3173         }
3174
3175         err = rdev_start_ap(rdev, dev, &params);
3176         if (!err) {
3177                 wdev->preset_chandef = params.chandef;
3178                 wdev->beacon_interval = params.beacon_interval;
3179                 wdev->channel = params.chandef.chan;
3180                 wdev->ssid_len = params.ssid_len;
3181                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3182         }
3183
3184         kfree(params.acl);
3185
3186         return err;
3187 }
3188
3189 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3190 {
3191         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3192         struct net_device *dev = info->user_ptr[1];
3193         struct wireless_dev *wdev = dev->ieee80211_ptr;
3194         struct cfg80211_beacon_data params;
3195         int err;
3196
3197         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3198             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3199                 return -EOPNOTSUPP;
3200
3201         if (!rdev->ops->change_beacon)
3202                 return -EOPNOTSUPP;
3203
3204         if (!wdev->beacon_interval)
3205                 return -EINVAL;
3206
3207         err = nl80211_parse_beacon(info->attrs, &params);
3208         if (err)
3209                 return err;
3210
3211         return rdev_change_beacon(rdev, dev, &params);
3212 }
3213
3214 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3215 {
3216         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3217         struct net_device *dev = info->user_ptr[1];
3218
3219         return cfg80211_stop_ap(rdev, dev);
3220 }
3221
3222 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3223         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3224         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3225         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3226         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3227         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3228         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3229 };
3230
3231 static int parse_station_flags(struct genl_info *info,
3232                                enum nl80211_iftype iftype,
3233                                struct station_parameters *params)
3234 {
3235         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3236         struct nlattr *nla;
3237         int flag;
3238
3239         /*
3240          * Try parsing the new attribute first so userspace
3241          * can specify both for older kernels.
3242          */
3243         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3244         if (nla) {
3245                 struct nl80211_sta_flag_update *sta_flags;
3246
3247                 sta_flags = nla_data(nla);
3248                 params->sta_flags_mask = sta_flags->mask;
3249                 params->sta_flags_set = sta_flags->set;
3250                 params->sta_flags_set &= params->sta_flags_mask;
3251                 if ((params->sta_flags_mask |
3252                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3253                         return -EINVAL;
3254                 return 0;
3255         }
3256
3257         /* if present, parse the old attribute */
3258
3259         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3260         if (!nla)
3261                 return 0;
3262
3263         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3264                              nla, sta_flags_policy))
3265                 return -EINVAL;
3266
3267         /*
3268          * Only allow certain flags for interface types so that
3269          * other attributes are silently ignored. Remember that
3270          * this is backward compatibility code with old userspace
3271          * and shouldn't be hit in other cases anyway.
3272          */
3273         switch (iftype) {
3274         case NL80211_IFTYPE_AP:
3275         case NL80211_IFTYPE_AP_VLAN:
3276         case NL80211_IFTYPE_P2P_GO:
3277                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3278                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3279                                          BIT(NL80211_STA_FLAG_WME) |
3280                                          BIT(NL80211_STA_FLAG_MFP);
3281                 break;
3282         case NL80211_IFTYPE_P2P_CLIENT:
3283         case NL80211_IFTYPE_STATION:
3284                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3285                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3286                 break;
3287         case NL80211_IFTYPE_MESH_POINT:
3288                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3289                                          BIT(NL80211_STA_FLAG_MFP) |
3290                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3291         default:
3292                 return -EINVAL;
3293         }
3294
3295         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3296                 if (flags[flag]) {
3297                         params->sta_flags_set |= (1<<flag);
3298
3299                         /* no longer support new API additions in old API */
3300                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3301                                 return -EINVAL;
3302                 }
3303         }
3304
3305         return 0;
3306 }
3307
3308 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3309                                  int attr)
3310 {
3311         struct nlattr *rate;
3312         u32 bitrate;
3313         u16 bitrate_compat;
3314
3315         rate = nla_nest_start(msg, attr);
3316         if (!rate)
3317                 return false;
3318
3319         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3320         bitrate = cfg80211_calculate_bitrate(info);
3321         /* report 16-bit bitrate only if we can */
3322         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3323         if (bitrate > 0 &&
3324             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3325                 return false;
3326         if (bitrate_compat > 0 &&
3327             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3328                 return false;
3329
3330         if (info->flags & RATE_INFO_FLAGS_MCS) {
3331                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3332                         return false;
3333                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3334                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3335                         return false;
3336                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3337                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3338                         return false;
3339         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3340                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3341                         return false;
3342                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3343                         return false;
3344                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3345                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3346                         return false;
3347                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3348                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3349                         return false;
3350                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3351                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3352                         return false;
3353                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3354                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3355                         return false;
3356                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3357                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3358                         return false;
3359         }
3360
3361         nla_nest_end(msg, rate);
3362         return true;
3363 }
3364
3365 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3366                                int id)
3367 {
3368         void *attr;
3369         int i = 0;
3370
3371         if (!mask)
3372                 return true;
3373
3374         attr = nla_nest_start(msg, id);
3375         if (!attr)
3376                 return false;
3377
3378         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3379                 if (!(mask & BIT(i)))
3380                         continue;
3381
3382                 if (nla_put_u8(msg, i, signal[i]))
3383                         return false;
3384         }
3385
3386         nla_nest_end(msg, attr);
3387
3388         return true;
3389 }
3390
3391 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3392                                 int flags,
3393                                 struct cfg80211_registered_device *rdev,
3394                                 struct net_device *dev,
3395                                 const u8 *mac_addr, struct station_info *sinfo)
3396 {
3397         void *hdr;
3398         struct nlattr *sinfoattr, *bss_param;
3399
3400         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3401         if (!hdr)
3402                 return -1;
3403
3404         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3405             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3406             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3407                 goto nla_put_failure;
3408
3409         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3410         if (!sinfoattr)
3411                 goto nla_put_failure;
3412         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3413             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3414                         sinfo->connected_time))
3415                 goto nla_put_failure;
3416         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3417             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3418                         sinfo->inactive_time))
3419                 goto nla_put_failure;
3420         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3421                               STATION_INFO_RX_BYTES64)) &&
3422             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3423                         (u32)sinfo->rx_bytes))
3424                 goto nla_put_failure;
3425         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3426                               STATION_INFO_TX_BYTES64)) &&
3427             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3428                         (u32)sinfo->tx_bytes))
3429                 goto nla_put_failure;
3430         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3431             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3432                         sinfo->rx_bytes))
3433                 goto nla_put_failure;
3434         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3435             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3436                         sinfo->tx_bytes))
3437                 goto nla_put_failure;
3438         if ((sinfo->filled & STATION_INFO_LLID) &&
3439             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3440                 goto nla_put_failure;
3441         if ((sinfo->filled & STATION_INFO_PLID) &&
3442             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3443                 goto nla_put_failure;
3444         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3445             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3446                        sinfo->plink_state))
3447                 goto nla_put_failure;
3448         switch (rdev->wiphy.signal_type) {
3449         case CFG80211_SIGNAL_TYPE_MBM:
3450                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3451                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3452                                sinfo->signal))
3453                         goto nla_put_failure;
3454                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3455                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3456                                sinfo->signal_avg))
3457                         goto nla_put_failure;
3458                 break;
3459         default:
3460                 break;
3461         }
3462         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3463                 if (!nl80211_put_signal(msg, sinfo->chains,
3464                                         sinfo->chain_signal,
3465                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3466                         goto nla_put_failure;
3467         }
3468         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3469                 if (!nl80211_put_signal(msg, sinfo->chains,
3470                                         sinfo->chain_signal_avg,
3471                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3472                         goto nla_put_failure;
3473         }
3474         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3475                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3476                                           NL80211_STA_INFO_TX_BITRATE))
3477                         goto nla_put_failure;
3478         }
3479         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3480                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3481                                           NL80211_STA_INFO_RX_BITRATE))
3482                         goto nla_put_failure;
3483         }
3484         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3485             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3486                         sinfo->rx_packets))
3487                 goto nla_put_failure;
3488         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3489             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3490                         sinfo->tx_packets))
3491                 goto nla_put_failure;
3492         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3493             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3494                         sinfo->tx_retries))
3495                 goto nla_put_failure;
3496         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3497             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3498                         sinfo->tx_failed))
3499                 goto nla_put_failure;
3500         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3501             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3502                         sinfo->beacon_loss_count))
3503                 goto nla_put_failure;
3504         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3505             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3506                         sinfo->local_pm))
3507                 goto nla_put_failure;
3508         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3509             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3510                         sinfo->peer_pm))
3511                 goto nla_put_failure;
3512         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3513             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3514                         sinfo->nonpeer_pm))
3515                 goto nla_put_failure;
3516         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3517                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3518                 if (!bss_param)
3519                         goto nla_put_failure;
3520
3521                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3522                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3523                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3524                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3525                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3526                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3527                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3528                                sinfo->bss_param.dtim_period) ||
3529                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3530                                 sinfo->bss_param.beacon_interval))
3531                         goto nla_put_failure;
3532
3533                 nla_nest_end(msg, bss_param);
3534         }
3535         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3536             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3537                     sizeof(struct nl80211_sta_flag_update),
3538                     &sinfo->sta_flags))
3539                 goto nla_put_failure;
3540         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3541                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3542                             sinfo->t_offset))
3543                 goto nla_put_failure;
3544         nla_nest_end(msg, sinfoattr);
3545
3546         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3547             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3548                     sinfo->assoc_req_ies))
3549                 goto nla_put_failure;
3550
3551         return genlmsg_end(msg, hdr);
3552
3553  nla_put_failure:
3554         genlmsg_cancel(msg, hdr);
3555         return -EMSGSIZE;
3556 }
3557
3558 static int nl80211_dump_station(struct sk_buff *skb,
3559                                 struct netlink_callback *cb)
3560 {
3561         struct station_info sinfo;
3562         struct cfg80211_registered_device *dev;
3563         struct wireless_dev *wdev;
3564         u8 mac_addr[ETH_ALEN];
3565         int sta_idx = cb->args[2];
3566         int err;
3567
3568         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3569         if (err)
3570                 return err;
3571
3572         if (!wdev->netdev) {
3573                 err = -EINVAL;
3574                 goto out_err;
3575         }
3576
3577         if (!dev->ops->dump_station) {
3578                 err = -EOPNOTSUPP;
3579                 goto out_err;
3580         }
3581
3582         while (1) {
3583                 memset(&sinfo, 0, sizeof(sinfo));
3584                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3585                                         mac_addr, &sinfo);
3586                 if (err == -ENOENT)
3587                         break;
3588                 if (err)
3589                         goto out_err;
3590
3591                 if (nl80211_send_station(skb,
3592                                 NETLINK_CB(cb->skb).portid,
3593                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3594                                 dev, wdev->netdev, mac_addr,
3595                                 &sinfo) < 0)
3596                         goto out;
3597
3598                 sta_idx++;
3599         }
3600
3601
3602  out:
3603         cb->args[2] = sta_idx;
3604         err = skb->len;
3605  out_err:
3606         nl80211_finish_wdev_dump(dev);
3607
3608         return err;
3609 }
3610
3611 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3612 {
3613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3614         struct net_device *dev = info->user_ptr[1];
3615         struct station_info sinfo;
3616         struct sk_buff *msg;
3617         u8 *mac_addr = NULL;
3618         int err;
3619
3620         memset(&sinfo, 0, sizeof(sinfo));
3621
3622         if (!info->attrs[NL80211_ATTR_MAC])
3623                 return -EINVAL;
3624
3625         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3626
3627         if (!rdev->ops->get_station)
3628                 return -EOPNOTSUPP;
3629
3630         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3631         if (err)
3632                 return err;
3633
3634         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3635         if (!msg)
3636                 return -ENOMEM;
3637
3638         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3639                                  rdev, dev, mac_addr, &sinfo) < 0) {
3640                 nlmsg_free(msg);
3641                 return -ENOBUFS;
3642         }
3643
3644         return genlmsg_reply(msg, info);
3645 }
3646
3647 int cfg80211_check_station_change(struct wiphy *wiphy,
3648                                   struct station_parameters *params,
3649                                   enum cfg80211_station_type statype)
3650 {
3651         if (params->listen_interval != -1)
3652                 return -EINVAL;
3653         if (params->aid)
3654                 return -EINVAL;
3655
3656         /* When you run into this, adjust the code below for the new flag */
3657         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3658
3659         switch (statype) {
3660         case CFG80211_STA_MESH_PEER_KERNEL:
3661         case CFG80211_STA_MESH_PEER_USER:
3662                 /*
3663                  * No ignoring the TDLS flag here -- the userspace mesh
3664                  * code doesn't have the bug of including TDLS in the
3665                  * mask everywhere.
3666                  */
3667                 if (params->sta_flags_mask &
3668                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3669                                   BIT(NL80211_STA_FLAG_MFP) |
3670                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3671                         return -EINVAL;
3672                 break;
3673         case CFG80211_STA_TDLS_PEER_SETUP:
3674         case CFG80211_STA_TDLS_PEER_ACTIVE:
3675                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3676                         return -EINVAL;
3677                 /* ignore since it can't change */
3678                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3679                 break;
3680         default:
3681                 /* disallow mesh-specific things */
3682                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3683                         return -EINVAL;
3684                 if (params->local_pm)
3685                         return -EINVAL;
3686                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3687                         return -EINVAL;
3688         }
3689
3690         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3691             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3692                 /* TDLS can't be set, ... */
3693                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3694                         return -EINVAL;
3695                 /*
3696                  * ... but don't bother the driver with it. This works around
3697                  * a hostapd/wpa_supplicant issue -- it always includes the
3698                  * TLDS_PEER flag in the mask even for AP mode.
3699                  */
3700                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3701         }
3702
3703         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3704                 /* reject other things that can't change */
3705                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3706                         return -EINVAL;
3707                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3708                         return -EINVAL;
3709                 if (params->supported_rates)
3710                         return -EINVAL;
3711                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3712                         return -EINVAL;
3713         }
3714
3715         if (statype != CFG80211_STA_AP_CLIENT) {
3716                 if (params->vlan)
3717                         return -EINVAL;
3718         }
3719
3720         switch (statype) {
3721         case CFG80211_STA_AP_MLME_CLIENT:
3722                 /* Use this only for authorizing/unauthorizing a station */
3723                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3724                         return -EOPNOTSUPP;
3725                 break;
3726         case CFG80211_STA_AP_CLIENT:
3727                 /* accept only the listed bits */
3728                 if (params->sta_flags_mask &
3729                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3730                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3731                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3732                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3733                                   BIT(NL80211_STA_FLAG_WME) |
3734                                   BIT(NL80211_STA_FLAG_MFP)))
3735                         return -EINVAL;
3736
3737                 /* but authenticated/associated only if driver handles it */
3738                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3739                     params->sta_flags_mask &
3740                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3741                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3742                         return -EINVAL;
3743                 break;
3744         case CFG80211_STA_IBSS:
3745         case CFG80211_STA_AP_STA:
3746                 /* reject any changes other than AUTHORIZED */
3747                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3748                         return -EINVAL;
3749                 break;
3750         case CFG80211_STA_TDLS_PEER_SETUP:
3751                 /* reject any changes other than AUTHORIZED or WME */
3752                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3753                                                BIT(NL80211_STA_FLAG_WME)))
3754                         return -EINVAL;
3755                 /* force (at least) rates when authorizing */
3756                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3757                     !params->supported_rates)
3758                         return -EINVAL;
3759                 break;
3760         case CFG80211_STA_TDLS_PEER_ACTIVE:
3761                 /* reject any changes */
3762                 return -EINVAL;
3763         case CFG80211_STA_MESH_PEER_KERNEL:
3764                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3765                         return -EINVAL;
3766                 break;
3767         case CFG80211_STA_MESH_PEER_USER:
3768                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3769                         return -EINVAL;
3770                 break;
3771         }
3772
3773         return 0;
3774 }
3775 EXPORT_SYMBOL(cfg80211_check_station_change);
3776
3777 /*
3778  * Get vlan interface making sure it is running and on the right wiphy.
3779  */
3780 static struct net_device *get_vlan(struct genl_info *info,
3781                                    struct cfg80211_registered_device *rdev)
3782 {
3783         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3784         struct net_device *v;
3785         int ret;
3786
3787         if (!vlanattr)
3788                 return NULL;
3789
3790         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3791         if (!v)
3792                 return ERR_PTR(-ENODEV);
3793
3794         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3795                 ret = -EINVAL;
3796                 goto error;
3797         }
3798
3799         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3800             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3801             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3802                 ret = -EINVAL;
3803                 goto error;
3804         }
3805
3806         if (!netif_running(v)) {
3807                 ret = -ENETDOWN;
3808                 goto error;
3809         }
3810
3811         return v;
3812  error:
3813         dev_put(v);
3814         return ERR_PTR(ret);
3815 }
3816
3817 static struct nla_policy
3818 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3819         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3820         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3821 };
3822
3823 static int nl80211_parse_sta_wme(struct genl_info *info,
3824                                  struct station_parameters *params)
3825 {
3826         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3827         struct nlattr *nla;
3828         int err;
3829
3830         /* parse WME attributes if present */
3831         if (!info->attrs[NL80211_ATTR_STA_WME])
3832                 return 0;
3833
3834         nla = info->attrs[NL80211_ATTR_STA_WME];
3835         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3836                                nl80211_sta_wme_policy);
3837         if (err)
3838                 return err;
3839
3840         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3841                 params->uapsd_queues = nla_get_u8(
3842                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3843         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3844                 return -EINVAL;
3845
3846         if (tb[NL80211_STA_WME_MAX_SP])
3847                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3848
3849         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3850                 return -EINVAL;
3851
3852         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3853
3854         return 0;
3855 }
3856
3857 static int nl80211_set_station_tdls(struct genl_info *info,
3858                                     struct station_parameters *params)
3859 {
3860         /* Dummy STA entry gets updated once the peer capabilities are known */
3861         if (info->attrs[NL80211_ATTR_PEER_AID])
3862                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3863         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3864                 params->ht_capa =
3865                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3866         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3867                 params->vht_capa =
3868                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3869
3870         return nl80211_parse_sta_wme(info, params);
3871 }
3872
3873 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3874 {
3875         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3876         struct net_device *dev = info->user_ptr[1];
3877         struct station_parameters params;
3878         u8 *mac_addr;
3879         int err;
3880
3881         memset(&params, 0, sizeof(params));
3882
3883         params.listen_interval = -1;
3884
3885         if (!rdev->ops->change_station)
3886                 return -EOPNOTSUPP;
3887
3888         if (info->attrs[NL80211_ATTR_STA_AID])
3889                 return -EINVAL;
3890
3891         if (!info->attrs[NL80211_ATTR_MAC])
3892                 return -EINVAL;
3893
3894         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3895
3896         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3897                 params.supported_rates =
3898                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3899                 params.supported_rates_len =
3900                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3901         }
3902
3903         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3904                 params.capability =
3905                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3906                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3907         }
3908
3909         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3910                 params.ext_capab =
3911                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3912                 params.ext_capab_len =
3913                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3914         }
3915
3916         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3917                 return -EINVAL;
3918
3919         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3920                 return -EINVAL;
3921
3922         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3923                 params.plink_action =
3924                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3925                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3926                         return -EINVAL;
3927         }
3928
3929         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3930                 params.plink_state =
3931                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3932                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3933                         return -EINVAL;
3934                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3935         }
3936
3937         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3938                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3939                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3940
3941                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3942                     pm > NL80211_MESH_POWER_MAX)
3943                         return -EINVAL;
3944
3945                 params.local_pm = pm;
3946         }
3947
3948         /* Include parameters for TDLS peer (will check later) */
3949         err = nl80211_set_station_tdls(info, &params);
3950         if (err)
3951                 return err;
3952
3953         params.vlan = get_vlan(info, rdev);
3954         if (IS_ERR(params.vlan))
3955                 return PTR_ERR(params.vlan);
3956
3957         switch (dev->ieee80211_ptr->iftype) {
3958         case NL80211_IFTYPE_AP:
3959         case NL80211_IFTYPE_AP_VLAN:
3960         case NL80211_IFTYPE_P2P_GO:
3961         case NL80211_IFTYPE_P2P_CLIENT:
3962         case NL80211_IFTYPE_STATION:
3963         case NL80211_IFTYPE_ADHOC:
3964         case NL80211_IFTYPE_MESH_POINT:
3965                 break;
3966         default:
3967                 err = -EOPNOTSUPP;
3968                 goto out_put_vlan;
3969         }
3970
3971         /* driver will call cfg80211_check_station_change() */
3972         err = rdev_change_station(rdev, dev, mac_addr, &params);
3973
3974  out_put_vlan:
3975         if (params.vlan)
3976                 dev_put(params.vlan);
3977
3978         return err;
3979 }
3980
3981 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3982 {
3983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3984         int err;
3985         struct net_device *dev = info->user_ptr[1];
3986         struct station_parameters params;
3987         u8 *mac_addr = NULL;
3988
3989         memset(&params, 0, sizeof(params));
3990
3991         if (!rdev->ops->add_station)
3992                 return -EOPNOTSUPP;
3993
3994         if (!info->attrs[NL80211_ATTR_MAC])
3995                 return -EINVAL;
3996
3997         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3998                 return -EINVAL;
3999
4000         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4001                 return -EINVAL;
4002
4003         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4004             !info->attrs[NL80211_ATTR_PEER_AID])
4005                 return -EINVAL;
4006
4007         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4008         params.supported_rates =
4009                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4010         params.supported_rates_len =
4011                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4012         params.listen_interval =
4013                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4014
4015         if (info->attrs[NL80211_ATTR_PEER_AID])
4016                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4017         else
4018                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4019         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4020                 return -EINVAL;
4021
4022         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4023                 params.capability =
4024                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4025                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4026         }
4027
4028         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4029                 params.ext_capab =
4030                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4031                 params.ext_capab_len =
4032                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4033         }
4034
4035         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4036                 params.ht_capa =
4037                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4038
4039         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4040                 params.vht_capa =
4041                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4042
4043         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4044                 params.plink_action =
4045                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4046                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4047                         return -EINVAL;
4048         }
4049
4050         err = nl80211_parse_sta_wme(info, &params);
4051         if (err)
4052                 return err;
4053
4054         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4055                 return -EINVAL;
4056
4057         /* When you run into this, adjust the code below for the new flag */
4058         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4059
4060         switch (dev->ieee80211_ptr->iftype) {
4061         case NL80211_IFTYPE_AP:
4062         case NL80211_IFTYPE_AP_VLAN:
4063         case NL80211_IFTYPE_P2P_GO:
4064                 /* ignore WME attributes if iface/sta is not capable */
4065                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4066                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4067                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4068
4069                 /* TDLS peers cannot be added */
4070                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4071                     info->attrs[NL80211_ATTR_PEER_AID])
4072                         return -EINVAL;
4073                 /* but don't bother the driver with it */
4074                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4075
4076                 /* allow authenticated/associated only if driver handles it */
4077                 if (!(rdev->wiphy.features &
4078                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4079                     params.sta_flags_mask &
4080                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4081                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4082                         return -EINVAL;
4083
4084                 /* must be last in here for error handling */
4085                 params.vlan = get_vlan(info, rdev);
4086                 if (IS_ERR(params.vlan))
4087                         return PTR_ERR(params.vlan);
4088                 break;
4089         case NL80211_IFTYPE_MESH_POINT:
4090                 /* ignore uAPSD data */
4091                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4092
4093                 /* associated is disallowed */
4094                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4095                         return -EINVAL;
4096                 /* TDLS peers cannot be added */
4097                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4098                     info->attrs[NL80211_ATTR_PEER_AID])
4099                         return -EINVAL;
4100                 break;
4101         case NL80211_IFTYPE_STATION:
4102         case NL80211_IFTYPE_P2P_CLIENT:
4103                 /* ignore uAPSD data */
4104                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4105
4106                 /* these are disallowed */
4107                 if (params.sta_flags_mask &
4108                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4109                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4110                         return -EINVAL;
4111                 /* Only TDLS peers can be added */
4112                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4113                         return -EINVAL;
4114                 /* Can only add if TDLS ... */
4115                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4116                         return -EOPNOTSUPP;
4117                 /* ... with external setup is supported */
4118                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4119                         return -EOPNOTSUPP;
4120                 /*
4121                  * Older wpa_supplicant versions always mark the TDLS peer
4122                  * as authorized, but it shouldn't yet be.
4123                  */
4124                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4125                 break;
4126         default:
4127                 return -EOPNOTSUPP;
4128         }
4129
4130         /* be aware of params.vlan when changing code here */
4131
4132         err = rdev_add_station(rdev, dev, mac_addr, &params);
4133
4134         if (params.vlan)
4135                 dev_put(params.vlan);
4136         return err;
4137 }
4138
4139 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4140 {
4141         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4142         struct net_device *dev = info->user_ptr[1];
4143         u8 *mac_addr = NULL;
4144
4145         if (info->attrs[NL80211_ATTR_MAC])
4146                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4147
4148         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4149             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4150             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4151             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4152                 return -EINVAL;
4153
4154         if (!rdev->ops->del_station)
4155                 return -EOPNOTSUPP;
4156
4157         return rdev_del_station(rdev, dev, mac_addr);
4158 }
4159
4160 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4161                                 int flags, struct net_device *dev,
4162                                 u8 *dst, u8 *next_hop,
4163                                 struct mpath_info *pinfo)
4164 {
4165         void *hdr;
4166         struct nlattr *pinfoattr;
4167
4168         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4169         if (!hdr)
4170                 return -1;
4171
4172         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4173             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4174             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4175             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4176                 goto nla_put_failure;
4177
4178         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4179         if (!pinfoattr)
4180                 goto nla_put_failure;
4181         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4182             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4183                         pinfo->frame_qlen))
4184                 goto nla_put_failure;
4185         if (((pinfo->filled & MPATH_INFO_SN) &&
4186              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4187             ((pinfo->filled & MPATH_INFO_METRIC) &&
4188              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4189                          pinfo->metric)) ||
4190             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4191              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4192                          pinfo->exptime)) ||
4193             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4194              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4195                         pinfo->flags)) ||
4196             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4197              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4198                          pinfo->discovery_timeout)) ||
4199             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4200              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4201                         pinfo->discovery_retries)))
4202                 goto nla_put_failure;
4203
4204         nla_nest_end(msg, pinfoattr);
4205
4206         return genlmsg_end(msg, hdr);
4207
4208  nla_put_failure:
4209         genlmsg_cancel(msg, hdr);
4210         return -EMSGSIZE;
4211 }
4212
4213 static int nl80211_dump_mpath(struct sk_buff *skb,
4214                               struct netlink_callback *cb)
4215 {
4216         struct mpath_info pinfo;
4217         struct cfg80211_registered_device *dev;
4218         struct wireless_dev *wdev;
4219         u8 dst[ETH_ALEN];
4220         u8 next_hop[ETH_ALEN];
4221         int path_idx = cb->args[2];
4222         int err;
4223
4224         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4225         if (err)
4226                 return err;
4227
4228         if (!dev->ops->dump_mpath) {
4229                 err = -EOPNOTSUPP;
4230                 goto out_err;
4231         }
4232
4233         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4234                 err = -EOPNOTSUPP;
4235                 goto out_err;
4236         }
4237
4238         while (1) {
4239                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4240                                       next_hop, &pinfo);
4241                 if (err == -ENOENT)
4242                         break;
4243                 if (err)
4244                         goto out_err;
4245
4246                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4247                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4248                                        wdev->netdev, dst, next_hop,
4249                                        &pinfo) < 0)
4250                         goto out;
4251
4252                 path_idx++;
4253         }
4254
4255
4256  out:
4257         cb->args[2] = path_idx;
4258         err = skb->len;
4259  out_err:
4260         nl80211_finish_wdev_dump(dev);
4261         return err;
4262 }
4263
4264 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4265 {
4266         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4267         int err;
4268         struct net_device *dev = info->user_ptr[1];
4269         struct mpath_info pinfo;
4270         struct sk_buff *msg;
4271         u8 *dst = NULL;
4272         u8 next_hop[ETH_ALEN];
4273
4274         memset(&pinfo, 0, sizeof(pinfo));
4275
4276         if (!info->attrs[NL80211_ATTR_MAC])
4277                 return -EINVAL;
4278
4279         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4280
4281         if (!rdev->ops->get_mpath)
4282                 return -EOPNOTSUPP;
4283
4284         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4285                 return -EOPNOTSUPP;
4286
4287         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4288         if (err)
4289                 return err;
4290
4291         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4292         if (!msg)
4293                 return -ENOMEM;
4294
4295         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4296                                  dev, dst, next_hop, &pinfo) < 0) {
4297                 nlmsg_free(msg);
4298                 return -ENOBUFS;
4299         }
4300
4301         return genlmsg_reply(msg, info);
4302 }
4303
4304 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4305 {
4306         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4307         struct net_device *dev = info->user_ptr[1];
4308         u8 *dst = NULL;
4309         u8 *next_hop = NULL;
4310
4311         if (!info->attrs[NL80211_ATTR_MAC])
4312                 return -EINVAL;
4313
4314         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4315                 return -EINVAL;
4316
4317         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4318         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4319
4320         if (!rdev->ops->change_mpath)
4321                 return -EOPNOTSUPP;
4322
4323         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4324                 return -EOPNOTSUPP;
4325
4326         return rdev_change_mpath(rdev, dev, dst, next_hop);
4327 }
4328
4329 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4330 {
4331         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4332         struct net_device *dev = info->user_ptr[1];
4333         u8 *dst = NULL;
4334         u8 *next_hop = NULL;
4335
4336         if (!info->attrs[NL80211_ATTR_MAC])
4337                 return -EINVAL;
4338
4339         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4340                 return -EINVAL;
4341
4342         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4343         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4344
4345         if (!rdev->ops->add_mpath)
4346                 return -EOPNOTSUPP;
4347
4348         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4349                 return -EOPNOTSUPP;
4350
4351         return rdev_add_mpath(rdev, dev, dst, next_hop);
4352 }
4353
4354 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4355 {
4356         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4357         struct net_device *dev = info->user_ptr[1];
4358         u8 *dst = NULL;
4359
4360         if (info->attrs[NL80211_ATTR_MAC])
4361                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4362
4363         if (!rdev->ops->del_mpath)
4364                 return -EOPNOTSUPP;
4365
4366         return rdev_del_mpath(rdev, dev, dst);
4367 }
4368
4369 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4370 {
4371         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4372         struct net_device *dev = info->user_ptr[1];
4373         struct bss_parameters params;
4374
4375         memset(&params, 0, sizeof(params));
4376         /* default to not changing parameters */
4377         params.use_cts_prot = -1;
4378         params.use_short_preamble = -1;
4379         params.use_short_slot_time = -1;
4380         params.ap_isolate = -1;
4381         params.ht_opmode = -1;
4382         params.p2p_ctwindow = -1;
4383         params.p2p_opp_ps = -1;
4384
4385         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4386                 params.use_cts_prot =
4387                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4388         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4389                 params.use_short_preamble =
4390                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4391         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4392                 params.use_short_slot_time =
4393                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4394         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4395                 params.basic_rates =
4396                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4397                 params.basic_rates_len =
4398                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4399         }
4400         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4401                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4402         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4403                 params.ht_opmode =
4404                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4405
4406         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4407                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4408                         return -EINVAL;
4409                 params.p2p_ctwindow =
4410                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4411                 if (params.p2p_ctwindow < 0)
4412                         return -EINVAL;
4413                 if (params.p2p_ctwindow != 0 &&
4414                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4415                         return -EINVAL;
4416         }
4417
4418         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4419                 u8 tmp;
4420
4421                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4422                         return -EINVAL;
4423                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4424                 if (tmp > 1)
4425                         return -EINVAL;
4426                 params.p2p_opp_ps = tmp;
4427                 if (params.p2p_opp_ps &&
4428                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4429                         return -EINVAL;
4430         }
4431
4432         if (!rdev->ops->change_bss)
4433                 return -EOPNOTSUPP;
4434
4435         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4436             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4437                 return -EOPNOTSUPP;
4438
4439         return rdev_change_bss(rdev, dev, &params);
4440 }
4441
4442 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4443         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4444         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4445         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4446         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4447         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4448         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4449 };
4450
4451 static int parse_reg_rule(struct nlattr *tb[],
4452         struct ieee80211_reg_rule *reg_rule)
4453 {
4454         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4455         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4456
4457         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4458                 return -EINVAL;
4459         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4460                 return -EINVAL;
4461         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4462                 return -EINVAL;
4463         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4464                 return -EINVAL;
4465         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4466                 return -EINVAL;
4467
4468         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4469
4470         freq_range->start_freq_khz =
4471                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4472         freq_range->end_freq_khz =
4473                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4474         freq_range->max_bandwidth_khz =
4475                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4476
4477         power_rule->max_eirp =
4478                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4479
4480         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4481                 power_rule->max_antenna_gain =
4482                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4483
4484         return 0;
4485 }
4486
4487 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4488 {
4489         int r;
4490         char *data = NULL;
4491         enum nl80211_user_reg_hint_type user_reg_hint_type;
4492
4493         /*
4494          * You should only get this when cfg80211 hasn't yet initialized
4495          * completely when built-in to the kernel right between the time
4496          * window between nl80211_init() and regulatory_init(), if that is
4497          * even possible.
4498          */
4499         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4500                 return -EINPROGRESS;
4501
4502         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4503                 return -EINVAL;
4504
4505         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4506
4507         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4508                 user_reg_hint_type =
4509                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4510         else
4511                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4512
4513         switch (user_reg_hint_type) {
4514         case NL80211_USER_REG_HINT_USER:
4515         case NL80211_USER_REG_HINT_CELL_BASE:
4516                 break;
4517         default:
4518                 return -EINVAL;
4519         }
4520
4521         r = regulatory_hint_user(data, user_reg_hint_type);
4522
4523         return r;
4524 }
4525
4526 static int nl80211_get_mesh_config(struct sk_buff *skb,
4527                                    struct genl_info *info)
4528 {
4529         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4530         struct net_device *dev = info->user_ptr[1];
4531         struct wireless_dev *wdev = dev->ieee80211_ptr;
4532         struct mesh_config cur_params;
4533         int err = 0;
4534         void *hdr;
4535         struct nlattr *pinfoattr;
4536         struct sk_buff *msg;
4537
4538         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4539                 return -EOPNOTSUPP;
4540
4541         if (!rdev->ops->get_mesh_config)
4542                 return -EOPNOTSUPP;
4543
4544         wdev_lock(wdev);
4545         /* If not connected, get default parameters */
4546         if (!wdev->mesh_id_len)
4547                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4548         else
4549                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4550         wdev_unlock(wdev);
4551
4552         if (err)
4553                 return err;
4554
4555         /* Draw up a netlink message to send back */
4556         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4557         if (!msg)
4558                 return -ENOMEM;
4559         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4560                              NL80211_CMD_GET_MESH_CONFIG);
4561         if (!hdr)
4562                 goto out;
4563         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4564         if (!pinfoattr)
4565                 goto nla_put_failure;
4566         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4567             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4568                         cur_params.dot11MeshRetryTimeout) ||
4569             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4570                         cur_params.dot11MeshConfirmTimeout) ||
4571             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4572                         cur_params.dot11MeshHoldingTimeout) ||
4573             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4574                         cur_params.dot11MeshMaxPeerLinks) ||
4575             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4576                        cur_params.dot11MeshMaxRetries) ||
4577             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4578                        cur_params.dot11MeshTTL) ||
4579             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4580                        cur_params.element_ttl) ||
4581             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4582                        cur_params.auto_open_plinks) ||
4583             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4584                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4585             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4586                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4587             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4588                         cur_params.path_refresh_time) ||
4589             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4590                         cur_params.min_discovery_timeout) ||
4591             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4592                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4593             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4594                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4595             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4596                         cur_params.dot11MeshHWMPperrMinInterval) ||
4597             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4598                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4599             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4600                        cur_params.dot11MeshHWMPRootMode) ||
4601             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4602                         cur_params.dot11MeshHWMPRannInterval) ||
4603             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4604                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4605             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4606                        cur_params.dot11MeshForwarding) ||
4607             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4608                         cur_params.rssi_threshold) ||
4609             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4610                         cur_params.ht_opmode) ||
4611             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4612                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4613             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4614                         cur_params.dot11MeshHWMProotInterval) ||
4615             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4616                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4617             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4618                         cur_params.power_mode) ||
4619             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4620                         cur_params.dot11MeshAwakeWindowDuration) ||
4621             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4622                         cur_params.plink_timeout))
4623                 goto nla_put_failure;
4624         nla_nest_end(msg, pinfoattr);
4625         genlmsg_end(msg, hdr);
4626         return genlmsg_reply(msg, info);
4627
4628  nla_put_failure:
4629         genlmsg_cancel(msg, hdr);
4630  out:
4631         nlmsg_free(msg);
4632         return -ENOBUFS;
4633 }
4634
4635 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4636         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4637         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4638         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4639         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4640         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4641         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4642         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4643         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4644         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4645         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4646         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4647         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4648         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4649         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4650         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4651         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4652         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4653         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4654         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4655         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4656         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4657         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4658         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4659         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4660         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4661         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4662         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4663         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4664 };
4665
4666 static const struct nla_policy
4667         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4668         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4669         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4670         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4671         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4672         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4673         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4674         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4675                                     .len = IEEE80211_MAX_DATA_LEN },
4676         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4677 };
4678
4679 static int nl80211_parse_mesh_config(struct genl_info *info,
4680                                      struct mesh_config *cfg,
4681                                      u32 *mask_out)
4682 {
4683         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4684         u32 mask = 0;
4685
4686 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4687 do {                                                                        \
4688         if (tb[attr]) {                                                     \
4689                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4690                         return -EINVAL;                                     \
4691                 cfg->param = fn(tb[attr]);                                  \
4692                 mask |= (1 << (attr - 1));                                  \
4693         }                                                                   \
4694 } while (0)
4695
4696
4697         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4698                 return -EINVAL;
4699         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4700                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4701                              nl80211_meshconf_params_policy))
4702                 return -EINVAL;
4703
4704         /* This makes sure that there aren't more than 32 mesh config
4705          * parameters (otherwise our bitfield scheme would not work.) */
4706         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4707
4708         /* Fill in the params struct */
4709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4710                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4711                                   nla_get_u16);
4712         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4713                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4714                                   nla_get_u16);
4715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4716                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4717                                   nla_get_u16);
4718         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4719                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4720                                   nla_get_u16);
4721         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4722                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4723                                   nla_get_u8);
4724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4725                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4726         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4727                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4728                                   nla_get_u8);
4729         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4730                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4731                                   nla_get_u8);
4732         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4733                                   1, 255, mask,
4734                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4735                                   nla_get_u32);
4736         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4737                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4738                                   nla_get_u8);
4739         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4740                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4741                                   nla_get_u32);
4742         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4743                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4744                                   nla_get_u16);
4745         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4746                                   1, 65535, mask,
4747                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4748                                   nla_get_u32);
4749         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4750                                   1, 65535, mask,
4751                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4752                                   nla_get_u16);
4753         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4754                                   1, 65535, mask,
4755                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4756                                   nla_get_u16);
4757         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4758                                   dot11MeshHWMPnetDiameterTraversalTime,
4759                                   1, 65535, mask,
4760                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4761                                   nla_get_u16);
4762         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4763                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4764                                   nla_get_u8);
4765         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4766                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4767                                   nla_get_u16);
4768         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4769                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4770                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4771                                   nla_get_u8);
4772         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4773                                   mask, NL80211_MESHCONF_FORWARDING,
4774                                   nla_get_u8);
4775         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4776                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4777                                   nla_get_s32);
4778         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4779                                   mask, NL80211_MESHCONF_HT_OPMODE,
4780                                   nla_get_u16);
4781         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4782                                   1, 65535, mask,
4783                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4784                                   nla_get_u32);
4785         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4786                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4787                                   nla_get_u16);
4788         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4789                                   dot11MeshHWMPconfirmationInterval,
4790                                   1, 65535, mask,
4791                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4792                                   nla_get_u16);
4793         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4794                                   NL80211_MESH_POWER_ACTIVE,
4795                                   NL80211_MESH_POWER_MAX,
4796                                   mask, NL80211_MESHCONF_POWER_MODE,
4797                                   nla_get_u32);
4798         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4799                                   0, 65535, mask,
4800                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4801         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4802                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4803                                   nla_get_u32);
4804         if (mask_out)
4805                 *mask_out = mask;
4806
4807         return 0;
4808
4809 #undef FILL_IN_MESH_PARAM_IF_SET
4810 }
4811
4812 static int nl80211_parse_mesh_setup(struct genl_info *info,
4813                                      struct mesh_setup *setup)
4814 {
4815         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4816         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4817
4818         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4819                 return -EINVAL;
4820         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4821                              info->attrs[NL80211_ATTR_MESH_SETUP],
4822                              nl80211_mesh_setup_params_policy))
4823                 return -EINVAL;
4824
4825         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4826                 setup->sync_method =
4827                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4828                  IEEE80211_SYNC_METHOD_VENDOR :
4829                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4830
4831         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4832                 setup->path_sel_proto =
4833                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4834                  IEEE80211_PATH_PROTOCOL_VENDOR :
4835                  IEEE80211_PATH_PROTOCOL_HWMP;
4836
4837         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4838                 setup->path_metric =
4839                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4840                  IEEE80211_PATH_METRIC_VENDOR :
4841                  IEEE80211_PATH_METRIC_AIRTIME;
4842
4843
4844         if (tb[NL80211_MESH_SETUP_IE]) {
4845                 struct nlattr *ieattr =
4846                         tb[NL80211_MESH_SETUP_IE];
4847                 if (!is_valid_ie_attr(ieattr))
4848                         return -EINVAL;
4849                 setup->ie = nla_data(ieattr);
4850                 setup->ie_len = nla_len(ieattr);
4851         }
4852         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4853             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4854                 return -EINVAL;
4855         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4856         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4857         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4858         if (setup->is_secure)
4859                 setup->user_mpm = true;
4860
4861         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4862                 if (!setup->user_mpm)
4863                         return -EINVAL;
4864                 setup->auth_id =
4865                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4866         }
4867
4868         return 0;
4869 }
4870
4871 static int nl80211_update_mesh_config(struct sk_buff *skb,
4872                                       struct genl_info *info)
4873 {
4874         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4875         struct net_device *dev = info->user_ptr[1];
4876         struct wireless_dev *wdev = dev->ieee80211_ptr;
4877         struct mesh_config cfg;
4878         u32 mask;
4879         int err;
4880
4881         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4882                 return -EOPNOTSUPP;
4883
4884         if (!rdev->ops->update_mesh_config)
4885                 return -EOPNOTSUPP;
4886
4887         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4888         if (err)
4889                 return err;
4890
4891         wdev_lock(wdev);
4892         if (!wdev->mesh_id_len)
4893                 err = -ENOLINK;
4894
4895         if (!err)
4896                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4897
4898         wdev_unlock(wdev);
4899
4900         return err;
4901 }
4902
4903 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4904 {
4905         const struct ieee80211_regdomain *regdom;
4906         struct sk_buff *msg;
4907         void *hdr = NULL;
4908         struct nlattr *nl_reg_rules;
4909         unsigned int i;
4910
4911         if (!cfg80211_regdomain)
4912                 return -EINVAL;
4913
4914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4915         if (!msg)
4916                 return -ENOBUFS;
4917
4918         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4919                              NL80211_CMD_GET_REG);
4920         if (!hdr)
4921                 goto put_failure;
4922
4923         if (reg_last_request_cell_base() &&
4924             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4925                         NL80211_USER_REG_HINT_CELL_BASE))
4926                 goto nla_put_failure;
4927
4928         rcu_read_lock();
4929         regdom = rcu_dereference(cfg80211_regdomain);
4930
4931         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4932             (regdom->dfs_region &&
4933              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4934                 goto nla_put_failure_rcu;
4935
4936         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4937         if (!nl_reg_rules)
4938                 goto nla_put_failure_rcu;
4939
4940         for (i = 0; i < regdom->n_reg_rules; i++) {
4941                 struct nlattr *nl_reg_rule;
4942                 const struct ieee80211_reg_rule *reg_rule;
4943                 const struct ieee80211_freq_range *freq_range;
4944                 const struct ieee80211_power_rule *power_rule;
4945
4946                 reg_rule = &regdom->reg_rules[i];
4947                 freq_range = &reg_rule->freq_range;
4948                 power_rule = &reg_rule->power_rule;
4949
4950                 nl_reg_rule = nla_nest_start(msg, i);
4951                 if (!nl_reg_rule)
4952                         goto nla_put_failure_rcu;
4953
4954                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4955                                 reg_rule->flags) ||
4956                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4957                                 freq_range->start_freq_khz) ||
4958                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4959                                 freq_range->end_freq_khz) ||
4960                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4961                                 freq_range->max_bandwidth_khz) ||
4962                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4963                                 power_rule->max_antenna_gain) ||
4964                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4965                                 power_rule->max_eirp))
4966                         goto nla_put_failure_rcu;
4967
4968                 nla_nest_end(msg, nl_reg_rule);
4969         }
4970         rcu_read_unlock();
4971
4972         nla_nest_end(msg, nl_reg_rules);
4973
4974         genlmsg_end(msg, hdr);
4975         return genlmsg_reply(msg, info);
4976
4977 nla_put_failure_rcu:
4978         rcu_read_unlock();
4979 nla_put_failure:
4980         genlmsg_cancel(msg, hdr);
4981 put_failure:
4982         nlmsg_free(msg);
4983         return -EMSGSIZE;
4984 }
4985
4986 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4987 {
4988         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4989         struct nlattr *nl_reg_rule;
4990         char *alpha2 = NULL;
4991         int rem_reg_rules = 0, r = 0;
4992         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4993         u8 dfs_region = 0;
4994         struct ieee80211_regdomain *rd = NULL;
4995
4996         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4997                 return -EINVAL;
4998
4999         if (!info->attrs[NL80211_ATTR_REG_RULES])
5000                 return -EINVAL;
5001
5002         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5003
5004         if (info->attrs[NL80211_ATTR_DFS_REGION])
5005                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5006
5007         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5008                             rem_reg_rules) {
5009                 num_rules++;
5010                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5011                         return -EINVAL;
5012         }
5013
5014         size_of_regd = sizeof(struct ieee80211_regdomain) +
5015                        num_rules * sizeof(struct ieee80211_reg_rule);
5016
5017         rd = kzalloc(size_of_regd, GFP_KERNEL);
5018         if (!rd)
5019                 return -ENOMEM;
5020
5021         rd->n_reg_rules = num_rules;
5022         rd->alpha2[0] = alpha2[0];
5023         rd->alpha2[1] = alpha2[1];
5024
5025         /*
5026          * Disable DFS master mode if the DFS region was
5027          * not supported or known on this kernel.
5028          */
5029         if (reg_supported_dfs_region(dfs_region))
5030                 rd->dfs_region = dfs_region;
5031
5032         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5033                             rem_reg_rules) {
5034                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5035                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5036                           reg_rule_policy);
5037                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5038                 if (r)
5039                         goto bad_reg;
5040
5041                 rule_idx++;
5042
5043                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5044                         r = -EINVAL;
5045                         goto bad_reg;
5046                 }
5047         }
5048
5049         r = set_regdom(rd);
5050         /* set_regdom took ownership */
5051         rd = NULL;
5052
5053  bad_reg:
5054         kfree(rd);
5055         return r;
5056 }
5057
5058 static int validate_scan_freqs(struct nlattr *freqs)
5059 {
5060         struct nlattr *attr1, *attr2;
5061         int n_channels = 0, tmp1, tmp2;
5062
5063         nla_for_each_nested(attr1, freqs, tmp1) {
5064                 n_channels++;
5065                 /*
5066                  * Some hardware has a limited channel list for
5067                  * scanning, and it is pretty much nonsensical
5068                  * to scan for a channel twice, so disallow that
5069                  * and don't require drivers to check that the
5070                  * channel list they get isn't longer than what
5071                  * they can scan, as long as they can scan all
5072                  * the channels they registered at once.
5073                  */
5074                 nla_for_each_nested(attr2, freqs, tmp2)
5075                         if (attr1 != attr2 &&
5076                             nla_get_u32(attr1) == nla_get_u32(attr2))
5077                                 return 0;
5078         }
5079
5080         return n_channels;
5081 }
5082
5083 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5084 {
5085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5086         struct wireless_dev *wdev = info->user_ptr[1];
5087         struct cfg80211_scan_request *request;
5088         struct nlattr *attr;
5089         struct wiphy *wiphy;
5090         int err, tmp, n_ssids = 0, n_channels, i;
5091         size_t ie_len;
5092
5093         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5094                 return -EINVAL;
5095
5096         wiphy = &rdev->wiphy;
5097
5098         if (!rdev->ops->scan)
5099                 return -EOPNOTSUPP;
5100
5101         if (rdev->scan_req) {
5102                 err = -EBUSY;
5103                 goto unlock;
5104         }
5105
5106         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5107                 n_channels = validate_scan_freqs(
5108                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5109                 if (!n_channels) {
5110                         err = -EINVAL;
5111                         goto unlock;
5112                 }
5113         } else {
5114                 enum ieee80211_band band;
5115                 n_channels = 0;
5116
5117                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5118                         if (wiphy->bands[band])
5119                                 n_channels += wiphy->bands[band]->n_channels;
5120         }
5121
5122         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5123                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5124                         n_ssids++;
5125
5126         if (n_ssids > wiphy->max_scan_ssids) {
5127                 err = -EINVAL;
5128                 goto unlock;
5129         }
5130
5131         if (info->attrs[NL80211_ATTR_IE])
5132                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5133         else
5134                 ie_len = 0;
5135
5136         if (ie_len > wiphy->max_scan_ie_len) {
5137                 err = -EINVAL;
5138                 goto unlock;
5139         }
5140
5141         request = kzalloc(sizeof(*request)
5142                         + sizeof(*request->ssids) * n_ssids
5143                         + sizeof(*request->channels) * n_channels
5144                         + ie_len, GFP_KERNEL);
5145         if (!request) {
5146                 err = -ENOMEM;
5147                 goto unlock;
5148         }
5149
5150         if (n_ssids)
5151                 request->ssids = (void *)&request->channels[n_channels];
5152         request->n_ssids = n_ssids;
5153         if (ie_len) {
5154                 if (request->ssids)
5155                         request->ie = (void *)(request->ssids + n_ssids);
5156                 else
5157                         request->ie = (void *)(request->channels + n_channels);
5158         }
5159
5160         i = 0;
5161         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5162                 /* user specified, bail out if channel not found */
5163                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5164                         struct ieee80211_channel *chan;
5165
5166                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5167
5168                         if (!chan) {
5169                                 err = -EINVAL;
5170                                 goto out_free;
5171                         }
5172
5173                         /* ignore disabled channels */
5174                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5175                                 continue;
5176
5177                         request->channels[i] = chan;
5178                         i++;
5179                 }
5180         } else {
5181                 enum ieee80211_band band;
5182
5183                 /* all channels */
5184                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5185                         int j;
5186                         if (!wiphy->bands[band])
5187                                 continue;
5188                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5189                                 struct ieee80211_channel *chan;
5190
5191                                 chan = &wiphy->bands[band]->channels[j];
5192
5193                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5194                                         continue;
5195
5196                                 request->channels[i] = chan;
5197                                 i++;
5198                         }
5199                 }
5200         }
5201
5202         if (!i) {
5203                 err = -EINVAL;
5204                 goto out_free;
5205         }
5206
5207         request->n_channels = i;
5208
5209         i = 0;
5210         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5211                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5212                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5213                                 err = -EINVAL;
5214                                 goto out_free;
5215                         }
5216                         request->ssids[i].ssid_len = nla_len(attr);
5217                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5218                         i++;
5219                 }
5220         }
5221
5222         if (info->attrs[NL80211_ATTR_IE]) {
5223                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5224                 memcpy((void *)request->ie,
5225                        nla_data(info->attrs[NL80211_ATTR_IE]),
5226                        request->ie_len);
5227         }
5228
5229         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5230                 if (wiphy->bands[i])
5231                         request->rates[i] =
5232                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5233
5234         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5235                 nla_for_each_nested(attr,
5236                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5237                                     tmp) {
5238                         enum ieee80211_band band = nla_type(attr);
5239
5240                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5241                                 err = -EINVAL;
5242                                 goto out_free;
5243                         }
5244                         err = ieee80211_get_ratemask(wiphy->bands[band],
5245                                                      nla_data(attr),
5246                                                      nla_len(attr),
5247                                                      &request->rates[band]);
5248                         if (err)
5249                                 goto out_free;
5250                 }
5251         }
5252
5253         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5254                 request->flags = nla_get_u32(
5255                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5256                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5257                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5258                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5259                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5260                         err = -EOPNOTSUPP;
5261                         goto out_free;
5262                 }
5263         }
5264
5265         request->no_cck =
5266                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5267
5268         request->wdev = wdev;
5269         request->wiphy = &rdev->wiphy;
5270         request->scan_start = jiffies;
5271
5272         rdev->scan_req = request;
5273         err = rdev_scan(rdev, request);
5274
5275         if (!err) {
5276                 nl80211_send_scan_start(rdev, wdev);
5277                 if (wdev->netdev)
5278                         dev_hold(wdev->netdev);
5279         } else {
5280  out_free:
5281                 rdev->scan_req = NULL;
5282                 kfree(request);
5283         }
5284
5285  unlock:
5286         return err;
5287 }
5288
5289 static int nl80211_start_sched_scan(struct sk_buff *skb,
5290                                     struct genl_info *info)
5291 {
5292         struct cfg80211_sched_scan_request *request;
5293         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5294         struct net_device *dev = info->user_ptr[1];
5295         struct nlattr *attr;
5296         struct wiphy *wiphy;
5297         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5298         u32 interval;
5299         enum ieee80211_band band;
5300         size_t ie_len;
5301         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5302
5303         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5304             !rdev->ops->sched_scan_start)
5305                 return -EOPNOTSUPP;
5306
5307         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5308                 return -EINVAL;
5309
5310         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5311                 return -EINVAL;
5312
5313         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5314         if (interval == 0)
5315                 return -EINVAL;
5316
5317         wiphy = &rdev->wiphy;
5318
5319         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5320                 n_channels = validate_scan_freqs(
5321                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5322                 if (!n_channels)
5323                         return -EINVAL;
5324         } else {
5325                 n_channels = 0;
5326
5327                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5328                         if (wiphy->bands[band])
5329                                 n_channels += wiphy->bands[band]->n_channels;
5330         }
5331
5332         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5333                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5334                                     tmp)
5335                         n_ssids++;
5336
5337         if (n_ssids > wiphy->max_sched_scan_ssids)
5338                 return -EINVAL;
5339
5340         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5341                 nla_for_each_nested(attr,
5342                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5343                                     tmp)
5344                         n_match_sets++;
5345
5346         if (n_match_sets > wiphy->max_match_sets)
5347                 return -EINVAL;
5348
5349         if (info->attrs[NL80211_ATTR_IE])
5350                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5351         else
5352                 ie_len = 0;
5353
5354         if (ie_len > wiphy->max_sched_scan_ie_len)
5355                 return -EINVAL;
5356
5357         if (rdev->sched_scan_req) {
5358                 err = -EINPROGRESS;
5359                 goto out;
5360         }
5361
5362         request = kzalloc(sizeof(*request)
5363                         + sizeof(*request->ssids) * n_ssids
5364                         + sizeof(*request->match_sets) * n_match_sets
5365                         + sizeof(*request->channels) * n_channels
5366                         + ie_len, GFP_KERNEL);
5367         if (!request) {
5368                 err = -ENOMEM;
5369                 goto out;
5370         }
5371
5372         if (n_ssids)
5373                 request->ssids = (void *)&request->channels[n_channels];
5374         request->n_ssids = n_ssids;
5375         if (ie_len) {
5376                 if (request->ssids)
5377                         request->ie = (void *)(request->ssids + n_ssids);
5378                 else
5379                         request->ie = (void *)(request->channels + n_channels);
5380         }
5381
5382         if (n_match_sets) {
5383                 if (request->ie)
5384                         request->match_sets = (void *)(request->ie + ie_len);
5385                 else if (request->ssids)
5386                         request->match_sets =
5387                                 (void *)(request->ssids + n_ssids);
5388                 else
5389                         request->match_sets =
5390                                 (void *)(request->channels + n_channels);
5391         }
5392         request->n_match_sets = n_match_sets;
5393
5394         i = 0;
5395         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5396                 /* user specified, bail out if channel not found */
5397                 nla_for_each_nested(attr,
5398                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5399                                     tmp) {
5400                         struct ieee80211_channel *chan;
5401
5402                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5403
5404                         if (!chan) {
5405                                 err = -EINVAL;
5406                                 goto out_free;
5407                         }
5408
5409                         /* ignore disabled channels */
5410                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5411                                 continue;
5412
5413                         request->channels[i] = chan;
5414                         i++;
5415                 }
5416         } else {
5417                 /* all channels */
5418                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5419                         int j;
5420                         if (!wiphy->bands[band])
5421                                 continue;
5422                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5423                                 struct ieee80211_channel *chan;
5424
5425                                 chan = &wiphy->bands[band]->channels[j];
5426
5427                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5428                                         continue;
5429
5430                                 request->channels[i] = chan;
5431                                 i++;
5432                         }
5433                 }
5434         }
5435
5436         if (!i) {
5437                 err = -EINVAL;
5438                 goto out_free;
5439         }
5440
5441         request->n_channels = i;
5442
5443         i = 0;
5444         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5445                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5446                                     tmp) {
5447                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5448                                 err = -EINVAL;
5449                                 goto out_free;
5450                         }
5451                         request->ssids[i].ssid_len = nla_len(attr);
5452                         memcpy(request->ssids[i].ssid, nla_data(attr),
5453                                nla_len(attr));
5454                         i++;
5455                 }
5456         }
5457
5458         i = 0;
5459         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5460                 nla_for_each_nested(attr,
5461                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5462                                     tmp) {
5463                         struct nlattr *ssid, *rssi;
5464
5465                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5466                                   nla_data(attr), nla_len(attr),
5467                                   nl80211_match_policy);
5468                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5469                         if (ssid) {
5470                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5471                                         err = -EINVAL;
5472                                         goto out_free;
5473                                 }
5474                                 memcpy(request->match_sets[i].ssid.ssid,
5475                                        nla_data(ssid), nla_len(ssid));
5476                                 request->match_sets[i].ssid.ssid_len =
5477                                         nla_len(ssid);
5478                         }
5479                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5480                         if (rssi)
5481                                 request->rssi_thold = nla_get_u32(rssi);
5482                         else
5483                                 request->rssi_thold =
5484                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5485                         i++;
5486                 }
5487         }
5488
5489         if (info->attrs[NL80211_ATTR_IE]) {
5490                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5491                 memcpy((void *)request->ie,
5492                        nla_data(info->attrs[NL80211_ATTR_IE]),
5493                        request->ie_len);
5494         }
5495
5496         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5497                 request->flags = nla_get_u32(
5498                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5499                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5500                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5501                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5502                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5503                         err = -EOPNOTSUPP;
5504                         goto out_free;
5505                 }
5506         }
5507
5508         request->dev = dev;
5509         request->wiphy = &rdev->wiphy;
5510         request->interval = interval;
5511         request->scan_start = jiffies;
5512
5513         err = rdev_sched_scan_start(rdev, dev, request);
5514         if (!err) {
5515                 rdev->sched_scan_req = request;
5516                 nl80211_send_sched_scan(rdev, dev,
5517                                         NL80211_CMD_START_SCHED_SCAN);
5518                 goto out;
5519         }
5520
5521 out_free:
5522         kfree(request);
5523 out:
5524         return err;
5525 }
5526
5527 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5528                                    struct genl_info *info)
5529 {
5530         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5531
5532         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5533             !rdev->ops->sched_scan_stop)
5534                 return -EOPNOTSUPP;
5535
5536         return __cfg80211_stop_sched_scan(rdev, false);
5537 }
5538
5539 static int nl80211_start_radar_detection(struct sk_buff *skb,
5540                                          struct genl_info *info)
5541 {
5542         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5543         struct net_device *dev = info->user_ptr[1];
5544         struct wireless_dev *wdev = dev->ieee80211_ptr;
5545         struct cfg80211_chan_def chandef;
5546         int err;
5547
5548         err = nl80211_parse_chandef(rdev, info, &chandef);
5549         if (err)
5550                 return err;
5551
5552         if (wdev->cac_started)
5553                 return -EBUSY;
5554
5555         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5556         if (err < 0)
5557                 return err;
5558
5559         if (err == 0)
5560                 return -EINVAL;
5561
5562         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5563                 return -EINVAL;
5564
5565         if (!rdev->ops->start_radar_detection)
5566                 return -EOPNOTSUPP;
5567
5568         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5569                                            chandef.chan, CHAN_MODE_SHARED,
5570                                            BIT(chandef.width));
5571         if (err)
5572                 return err;
5573
5574         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5575         if (!err) {
5576                 wdev->channel = chandef.chan;
5577                 wdev->cac_started = true;
5578                 wdev->cac_start_time = jiffies;
5579         }
5580         return err;
5581 }
5582
5583 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5584                             u32 seq, int flags,
5585                             struct cfg80211_registered_device *rdev,
5586                             struct wireless_dev *wdev,
5587                             struct cfg80211_internal_bss *intbss)
5588 {
5589         struct cfg80211_bss *res = &intbss->pub;
5590         const struct cfg80211_bss_ies *ies;
5591         void *hdr;
5592         struct nlattr *bss;
5593         bool tsf = false;
5594
5595         ASSERT_WDEV_LOCK(wdev);
5596
5597         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5598                              NL80211_CMD_NEW_SCAN_RESULTS);
5599         if (!hdr)
5600                 return -1;
5601
5602         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5603
5604         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5605                 goto nla_put_failure;
5606         if (wdev->netdev &&
5607             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5608                 goto nla_put_failure;
5609         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5610                 goto nla_put_failure;
5611
5612         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5613         if (!bss)
5614                 goto nla_put_failure;
5615         if ((!is_zero_ether_addr(res->bssid) &&
5616              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5617                 goto nla_put_failure;
5618
5619         rcu_read_lock();
5620         ies = rcu_dereference(res->ies);
5621         if (ies) {
5622                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5623                         goto fail_unlock_rcu;
5624                 tsf = true;
5625                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5626                                         ies->len, ies->data))
5627                         goto fail_unlock_rcu;
5628         }
5629         ies = rcu_dereference(res->beacon_ies);
5630         if (ies) {
5631                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5632                         goto fail_unlock_rcu;
5633                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5634                                         ies->len, ies->data))
5635                         goto fail_unlock_rcu;
5636         }
5637         rcu_read_unlock();
5638
5639         if (res->beacon_interval &&
5640             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5641                 goto nla_put_failure;
5642         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5643             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5644             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5645                         jiffies_to_msecs(jiffies - intbss->ts)))
5646                 goto nla_put_failure;
5647
5648         switch (rdev->wiphy.signal_type) {
5649         case CFG80211_SIGNAL_TYPE_MBM:
5650                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5651                         goto nla_put_failure;
5652                 break;
5653         case CFG80211_SIGNAL_TYPE_UNSPEC:
5654                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5655                         goto nla_put_failure;
5656                 break;
5657         default:
5658                 break;
5659         }
5660
5661         switch (wdev->iftype) {
5662         case NL80211_IFTYPE_P2P_CLIENT:
5663         case NL80211_IFTYPE_STATION:
5664                 if (intbss == wdev->current_bss &&
5665                     nla_put_u32(msg, NL80211_BSS_STATUS,
5666                                 NL80211_BSS_STATUS_ASSOCIATED))
5667                         goto nla_put_failure;
5668                 break;
5669         case NL80211_IFTYPE_ADHOC:
5670                 if (intbss == wdev->current_bss &&
5671                     nla_put_u32(msg, NL80211_BSS_STATUS,
5672                                 NL80211_BSS_STATUS_IBSS_JOINED))
5673                         goto nla_put_failure;
5674                 break;
5675         default:
5676                 break;
5677         }
5678
5679         nla_nest_end(msg, bss);
5680
5681         return genlmsg_end(msg, hdr);
5682
5683  fail_unlock_rcu:
5684         rcu_read_unlock();
5685  nla_put_failure:
5686         genlmsg_cancel(msg, hdr);
5687         return -EMSGSIZE;
5688 }
5689
5690 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5691 {
5692         struct cfg80211_registered_device *rdev;
5693         struct cfg80211_internal_bss *scan;
5694         struct wireless_dev *wdev;
5695         int start = cb->args[2], idx = 0;
5696         int err;
5697
5698         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5699         if (err)
5700                 return err;
5701
5702         wdev_lock(wdev);
5703         spin_lock_bh(&rdev->bss_lock);
5704         cfg80211_bss_expire(rdev);
5705
5706         cb->seq = rdev->bss_generation;
5707
5708         list_for_each_entry(scan, &rdev->bss_list, list) {
5709                 if (++idx <= start)
5710                         continue;
5711                 if (nl80211_send_bss(skb, cb,
5712                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5713                                 rdev, wdev, scan) < 0) {
5714                         idx--;
5715                         break;
5716                 }
5717         }
5718
5719         spin_unlock_bh(&rdev->bss_lock);
5720         wdev_unlock(wdev);
5721
5722         cb->args[2] = idx;
5723         nl80211_finish_wdev_dump(rdev);
5724
5725         return skb->len;
5726 }
5727
5728 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5729                                 int flags, struct net_device *dev,
5730                                 struct survey_info *survey)
5731 {
5732         void *hdr;
5733         struct nlattr *infoattr;
5734
5735         hdr = nl80211hdr_put(msg, portid, seq, flags,
5736                              NL80211_CMD_NEW_SURVEY_RESULTS);
5737         if (!hdr)
5738                 return -ENOMEM;
5739
5740         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5741                 goto nla_put_failure;
5742
5743         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5744         if (!infoattr)
5745                 goto nla_put_failure;
5746
5747         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5748                         survey->channel->center_freq))
5749                 goto nla_put_failure;
5750
5751         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5752             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5753                 goto nla_put_failure;
5754         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5755             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5756                 goto nla_put_failure;
5757         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5758             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5759                         survey->channel_time))
5760                 goto nla_put_failure;
5761         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5762             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5763                         survey->channel_time_busy))
5764                 goto nla_put_failure;
5765         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5766             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5767                         survey->channel_time_ext_busy))
5768                 goto nla_put_failure;
5769         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5770             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5771                         survey->channel_time_rx))
5772                 goto nla_put_failure;
5773         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5774             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5775                         survey->channel_time_tx))
5776                 goto nla_put_failure;
5777
5778         nla_nest_end(msg, infoattr);
5779
5780         return genlmsg_end(msg, hdr);
5781
5782  nla_put_failure:
5783         genlmsg_cancel(msg, hdr);
5784         return -EMSGSIZE;
5785 }
5786
5787 static int nl80211_dump_survey(struct sk_buff *skb,
5788                         struct netlink_callback *cb)
5789 {
5790         struct survey_info survey;
5791         struct cfg80211_registered_device *dev;
5792         struct wireless_dev *wdev;
5793         int survey_idx = cb->args[2];
5794         int res;
5795
5796         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5797         if (res)
5798                 return res;
5799
5800         if (!wdev->netdev) {
5801                 res = -EINVAL;
5802                 goto out_err;
5803         }
5804
5805         if (!dev->ops->dump_survey) {
5806                 res = -EOPNOTSUPP;
5807                 goto out_err;
5808         }
5809
5810         while (1) {
5811                 struct ieee80211_channel *chan;
5812
5813                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5814                 if (res == -ENOENT)
5815                         break;
5816                 if (res)
5817                         goto out_err;
5818
5819                 /* Survey without a channel doesn't make sense */
5820                 if (!survey.channel) {
5821                         res = -EINVAL;
5822                         goto out;
5823                 }
5824
5825                 chan = ieee80211_get_channel(&dev->wiphy,
5826                                              survey.channel->center_freq);
5827                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5828                         survey_idx++;
5829                         continue;
5830                 }
5831
5832                 if (nl80211_send_survey(skb,
5833                                 NETLINK_CB(cb->skb).portid,
5834                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5835                                 wdev->netdev, &survey) < 0)
5836                         goto out;
5837                 survey_idx++;
5838         }
5839
5840  out:
5841         cb->args[2] = survey_idx;
5842         res = skb->len;
5843  out_err:
5844         nl80211_finish_wdev_dump(dev);
5845         return res;
5846 }
5847
5848 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5849 {
5850         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5851                                   NL80211_WPA_VERSION_2));
5852 }
5853
5854 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5855 {
5856         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5857         struct net_device *dev = info->user_ptr[1];
5858         struct ieee80211_channel *chan;
5859         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5860         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5861         enum nl80211_auth_type auth_type;
5862         struct key_parse key;
5863         bool local_state_change;
5864
5865         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5866                 return -EINVAL;
5867
5868         if (!info->attrs[NL80211_ATTR_MAC])
5869                 return -EINVAL;
5870
5871         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5872                 return -EINVAL;
5873
5874         if (!info->attrs[NL80211_ATTR_SSID])
5875                 return -EINVAL;
5876
5877         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5878                 return -EINVAL;
5879
5880         err = nl80211_parse_key(info, &key);
5881         if (err)
5882                 return err;
5883
5884         if (key.idx >= 0) {
5885                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5886                         return -EINVAL;
5887                 if (!key.p.key || !key.p.key_len)
5888                         return -EINVAL;
5889                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5890                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5891                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5892                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5893                         return -EINVAL;
5894                 if (key.idx > 4)
5895                         return -EINVAL;
5896         } else {
5897                 key.p.key_len = 0;
5898                 key.p.key = NULL;
5899         }
5900
5901         if (key.idx >= 0) {
5902                 int i;
5903                 bool ok = false;
5904                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5905                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5906                                 ok = true;
5907                                 break;
5908                         }
5909                 }
5910                 if (!ok)
5911                         return -EINVAL;
5912         }
5913
5914         if (!rdev->ops->auth)
5915                 return -EOPNOTSUPP;
5916
5917         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5918             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5919                 return -EOPNOTSUPP;
5920
5921         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5922         chan = ieee80211_get_channel(&rdev->wiphy,
5923                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5924         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5925                 return -EINVAL;
5926
5927         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5928         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5929
5930         if (info->attrs[NL80211_ATTR_IE]) {
5931                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5932                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5933         }
5934
5935         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5936         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5937                 return -EINVAL;
5938
5939         if (auth_type == NL80211_AUTHTYPE_SAE &&
5940             !info->attrs[NL80211_ATTR_SAE_DATA])
5941                 return -EINVAL;
5942
5943         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5944                 if (auth_type != NL80211_AUTHTYPE_SAE)
5945                         return -EINVAL;
5946                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5947                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5948                 /* need to include at least Auth Transaction and Status Code */
5949                 if (sae_data_len < 4)
5950                         return -EINVAL;
5951         }
5952
5953         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5954
5955         /*
5956          * Since we no longer track auth state, ignore
5957          * requests to only change local state.
5958          */
5959         if (local_state_change)
5960                 return 0;
5961
5962         wdev_lock(dev->ieee80211_ptr);
5963         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5964                                  ssid, ssid_len, ie, ie_len,
5965                                  key.p.key, key.p.key_len, key.idx,
5966                                  sae_data, sae_data_len);
5967         wdev_unlock(dev->ieee80211_ptr);
5968         return err;
5969 }
5970
5971 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5972                                    struct genl_info *info,
5973                                    struct cfg80211_crypto_settings *settings,
5974                                    int cipher_limit)
5975 {
5976         memset(settings, 0, sizeof(*settings));
5977
5978         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5979
5980         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5981                 u16 proto;
5982                 proto = nla_get_u16(
5983                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5984                 settings->control_port_ethertype = cpu_to_be16(proto);
5985                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5986                     proto != ETH_P_PAE)
5987                         return -EINVAL;
5988                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5989                         settings->control_port_no_encrypt = true;
5990         } else
5991                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5992
5993         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5994                 void *data;
5995                 int len, i;
5996
5997                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5998                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5999                 settings->n_ciphers_pairwise = len / sizeof(u32);
6000
6001                 if (len % sizeof(u32))
6002                         return -EINVAL;
6003
6004                 if (settings->n_ciphers_pairwise > cipher_limit)
6005                         return -EINVAL;
6006
6007                 memcpy(settings->ciphers_pairwise, data, len);
6008
6009                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6010                         if (!cfg80211_supported_cipher_suite(
6011                                         &rdev->wiphy,
6012                                         settings->ciphers_pairwise[i]))
6013                                 return -EINVAL;
6014         }
6015
6016         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6017                 settings->cipher_group =
6018                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6019                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6020                                                      settings->cipher_group))
6021                         return -EINVAL;
6022         }
6023
6024         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6025                 settings->wpa_versions =
6026                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6027                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6028                         return -EINVAL;
6029         }
6030
6031         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6032                 void *data;
6033                 int len;
6034
6035                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6036                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6037                 settings->n_akm_suites = len / sizeof(u32);
6038
6039                 if (len % sizeof(u32))
6040                         return -EINVAL;
6041
6042                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6043                         return -EINVAL;
6044
6045                 memcpy(settings->akm_suites, data, len);
6046         }
6047
6048         return 0;
6049 }
6050
6051 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6052 {
6053         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6054         struct net_device *dev = info->user_ptr[1];
6055         struct ieee80211_channel *chan;
6056         struct cfg80211_assoc_request req = {};
6057         const u8 *bssid, *ssid;
6058         int err, ssid_len = 0;
6059
6060         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6061                 return -EINVAL;
6062
6063         if (!info->attrs[NL80211_ATTR_MAC] ||
6064             !info->attrs[NL80211_ATTR_SSID] ||
6065             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6066                 return -EINVAL;
6067
6068         if (!rdev->ops->assoc)
6069                 return -EOPNOTSUPP;
6070
6071         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6072             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6073                 return -EOPNOTSUPP;
6074
6075         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6076
6077         chan = ieee80211_get_channel(&rdev->wiphy,
6078                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6079         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6080                 return -EINVAL;
6081
6082         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6083         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6084
6085         if (info->attrs[NL80211_ATTR_IE]) {
6086                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6087                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6088         }
6089
6090         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6091                 enum nl80211_mfp mfp =
6092                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6093                 if (mfp == NL80211_MFP_REQUIRED)
6094                         req.use_mfp = true;
6095                 else if (mfp != NL80211_MFP_NO)
6096                         return -EINVAL;
6097         }
6098
6099         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6100                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6101
6102         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6103                 req.flags |= ASSOC_REQ_DISABLE_HT;
6104
6105         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6106                 memcpy(&req.ht_capa_mask,
6107                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6108                        sizeof(req.ht_capa_mask));
6109
6110         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6111                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6112                         return -EINVAL;
6113                 memcpy(&req.ht_capa,
6114                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6115                        sizeof(req.ht_capa));
6116         }
6117
6118         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6119                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6120
6121         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6122                 memcpy(&req.vht_capa_mask,
6123                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6124                        sizeof(req.vht_capa_mask));
6125
6126         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6127                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6128                         return -EINVAL;
6129                 memcpy(&req.vht_capa,
6130                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6131                        sizeof(req.vht_capa));
6132         }
6133
6134         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6135         if (!err) {
6136                 wdev_lock(dev->ieee80211_ptr);
6137                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6138                                           ssid, ssid_len, &req);
6139                 wdev_unlock(dev->ieee80211_ptr);
6140         }
6141
6142         return err;
6143 }
6144
6145 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6146 {
6147         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6148         struct net_device *dev = info->user_ptr[1];
6149         const u8 *ie = NULL, *bssid;
6150         int ie_len = 0, err;
6151         u16 reason_code;
6152         bool local_state_change;
6153
6154         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6155                 return -EINVAL;
6156
6157         if (!info->attrs[NL80211_ATTR_MAC])
6158                 return -EINVAL;
6159
6160         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6161                 return -EINVAL;
6162
6163         if (!rdev->ops->deauth)
6164                 return -EOPNOTSUPP;
6165
6166         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6167             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6168                 return -EOPNOTSUPP;
6169
6170         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6171
6172         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6173         if (reason_code == 0) {
6174                 /* Reason Code 0 is reserved */
6175                 return -EINVAL;
6176         }
6177
6178         if (info->attrs[NL80211_ATTR_IE]) {
6179                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6180                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6181         }
6182
6183         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6184
6185         wdev_lock(dev->ieee80211_ptr);
6186         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6187                                    local_state_change);
6188         wdev_unlock(dev->ieee80211_ptr);
6189         return err;
6190 }
6191
6192 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6193 {
6194         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6195         struct net_device *dev = info->user_ptr[1];
6196         const u8 *ie = NULL, *bssid;
6197         int ie_len = 0, err;
6198         u16 reason_code;
6199         bool local_state_change;
6200
6201         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6202                 return -EINVAL;
6203
6204         if (!info->attrs[NL80211_ATTR_MAC])
6205                 return -EINVAL;
6206
6207         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6208                 return -EINVAL;
6209
6210         if (!rdev->ops->disassoc)
6211                 return -EOPNOTSUPP;
6212
6213         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6214             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6215                 return -EOPNOTSUPP;
6216
6217         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6218
6219         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6220         if (reason_code == 0) {
6221                 /* Reason Code 0 is reserved */
6222                 return -EINVAL;
6223         }
6224
6225         if (info->attrs[NL80211_ATTR_IE]) {
6226                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6227                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6228         }
6229
6230         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6231
6232         wdev_lock(dev->ieee80211_ptr);
6233         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6234                                      local_state_change);
6235         wdev_unlock(dev->ieee80211_ptr);
6236         return err;
6237 }
6238
6239 static bool
6240 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6241                          int mcast_rate[IEEE80211_NUM_BANDS],
6242                          int rateval)
6243 {
6244         struct wiphy *wiphy = &rdev->wiphy;
6245         bool found = false;
6246         int band, i;
6247
6248         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6249                 struct ieee80211_supported_band *sband;
6250
6251                 sband = wiphy->bands[band];
6252                 if (!sband)
6253                         continue;
6254
6255                 for (i = 0; i < sband->n_bitrates; i++) {
6256                         if (sband->bitrates[i].bitrate == rateval) {
6257                                 mcast_rate[band] = i + 1;
6258                                 found = true;
6259                                 break;
6260                         }
6261                 }
6262         }
6263
6264         return found;
6265 }
6266
6267 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6268 {
6269         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6270         struct net_device *dev = info->user_ptr[1];
6271         struct cfg80211_ibss_params ibss;
6272         struct wiphy *wiphy;
6273         struct cfg80211_cached_keys *connkeys = NULL;
6274         int err;
6275
6276         memset(&ibss, 0, sizeof(ibss));
6277
6278         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6279                 return -EINVAL;
6280
6281         if (!info->attrs[NL80211_ATTR_SSID] ||
6282             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6283                 return -EINVAL;
6284
6285         ibss.beacon_interval = 100;
6286
6287         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6288                 ibss.beacon_interval =
6289                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6290                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6291                         return -EINVAL;
6292         }
6293
6294         if (!rdev->ops->join_ibss)
6295                 return -EOPNOTSUPP;
6296
6297         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6298                 return -EOPNOTSUPP;
6299
6300         wiphy = &rdev->wiphy;
6301
6302         if (info->attrs[NL80211_ATTR_MAC]) {
6303                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6304
6305                 if (!is_valid_ether_addr(ibss.bssid))
6306                         return -EINVAL;
6307         }
6308         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6309         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6310
6311         if (info->attrs[NL80211_ATTR_IE]) {
6312                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6313                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6314         }
6315
6316         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6317         if (err)
6318                 return err;
6319
6320         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6321                 return -EINVAL;
6322
6323         switch (ibss.chandef.width) {
6324         case NL80211_CHAN_WIDTH_20_NOHT:
6325                 break;
6326         case NL80211_CHAN_WIDTH_20:
6327         case NL80211_CHAN_WIDTH_40:
6328                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6329                         break;
6330         default:
6331                 return -EINVAL;
6332         }
6333
6334         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6335         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6336
6337         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6338                 u8 *rates =
6339                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6340                 int n_rates =
6341                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6342                 struct ieee80211_supported_band *sband =
6343                         wiphy->bands[ibss.chandef.chan->band];
6344
6345                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6346                                              &ibss.basic_rates);
6347                 if (err)
6348                         return err;
6349         }
6350
6351         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6352             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6353                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6354                 return -EINVAL;
6355
6356         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6357                 bool no_ht = false;
6358
6359                 connkeys = nl80211_parse_connkeys(rdev,
6360                                           info->attrs[NL80211_ATTR_KEYS],
6361                                           &no_ht);
6362                 if (IS_ERR(connkeys))
6363                         return PTR_ERR(connkeys);
6364
6365                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6366                     no_ht) {
6367                         kfree(connkeys);
6368                         return -EINVAL;
6369                 }
6370         }
6371
6372         ibss.control_port =
6373                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6374
6375         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6376         if (err)
6377                 kfree(connkeys);
6378         return err;
6379 }
6380
6381 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6382 {
6383         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6384         struct net_device *dev = info->user_ptr[1];
6385
6386         if (!rdev->ops->leave_ibss)
6387                 return -EOPNOTSUPP;
6388
6389         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6390                 return -EOPNOTSUPP;
6391
6392         return cfg80211_leave_ibss(rdev, dev, false);
6393 }
6394
6395 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6396 {
6397         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6398         struct net_device *dev = info->user_ptr[1];
6399         int mcast_rate[IEEE80211_NUM_BANDS];
6400         u32 nla_rate;
6401         int err;
6402
6403         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6404             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6405                 return -EOPNOTSUPP;
6406
6407         if (!rdev->ops->set_mcast_rate)
6408                 return -EOPNOTSUPP;
6409
6410         memset(mcast_rate, 0, sizeof(mcast_rate));
6411
6412         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6413                 return -EINVAL;
6414
6415         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6416         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6417                 return -EINVAL;
6418
6419         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6420
6421         return err;
6422 }
6423
6424
6425 #ifdef CONFIG_NL80211_TESTMODE
6426 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6427         .name = "testmode",
6428 };
6429
6430 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6431 {
6432         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6433         int err;
6434
6435         if (!info->attrs[NL80211_ATTR_TESTDATA])
6436                 return -EINVAL;
6437
6438         err = -EOPNOTSUPP;
6439         if (rdev->ops->testmode_cmd) {
6440                 rdev->testmode_info = info;
6441                 err = rdev_testmode_cmd(rdev,
6442                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6443                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6444                 rdev->testmode_info = NULL;
6445         }
6446
6447         return err;
6448 }
6449
6450 static int nl80211_testmode_dump(struct sk_buff *skb,
6451                                  struct netlink_callback *cb)
6452 {
6453         struct cfg80211_registered_device *rdev;
6454         int err;
6455         long phy_idx;
6456         void *data = NULL;
6457         int data_len = 0;
6458
6459         rtnl_lock();
6460
6461         if (cb->args[0]) {
6462                 /*
6463                  * 0 is a valid index, but not valid for args[0],
6464                  * so we need to offset by 1.
6465                  */
6466                 phy_idx = cb->args[0] - 1;
6467         } else {
6468                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6469                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6470                                   nl80211_policy);
6471                 if (err)
6472                         goto out_err;
6473
6474                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6475                                                   nl80211_fam.attrbuf);
6476                 if (IS_ERR(rdev)) {
6477                         err = PTR_ERR(rdev);
6478                         goto out_err;
6479                 }
6480                 phy_idx = rdev->wiphy_idx;
6481                 rdev = NULL;
6482
6483                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6484                         cb->args[1] =
6485                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6486         }
6487
6488         if (cb->args[1]) {
6489                 data = nla_data((void *)cb->args[1]);
6490                 data_len = nla_len((void *)cb->args[1]);
6491         }
6492
6493         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6494         if (!rdev) {
6495                 err = -ENOENT;
6496                 goto out_err;
6497         }
6498
6499         if (!rdev->ops->testmode_dump) {
6500                 err = -EOPNOTSUPP;
6501                 goto out_err;
6502         }
6503
6504         while (1) {
6505                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6506                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6507                                            NL80211_CMD_TESTMODE);
6508                 struct nlattr *tmdata;
6509
6510                 if (!hdr)
6511                         break;
6512
6513                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6514                         genlmsg_cancel(skb, hdr);
6515                         break;
6516                 }
6517
6518                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6519                 if (!tmdata) {
6520                         genlmsg_cancel(skb, hdr);
6521                         break;
6522                 }
6523                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6524                 nla_nest_end(skb, tmdata);
6525
6526                 if (err == -ENOBUFS || err == -ENOENT) {
6527                         genlmsg_cancel(skb, hdr);
6528                         break;
6529                 } else if (err) {
6530                         genlmsg_cancel(skb, hdr);
6531                         goto out_err;
6532                 }
6533
6534                 genlmsg_end(skb, hdr);
6535         }
6536
6537         err = skb->len;
6538         /* see above */
6539         cb->args[0] = phy_idx + 1;
6540  out_err:
6541         rtnl_unlock();
6542         return err;
6543 }
6544
6545 static struct sk_buff *
6546 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6547                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6548 {
6549         struct sk_buff *skb;
6550         void *hdr;
6551         struct nlattr *data;
6552
6553         skb = nlmsg_new(approxlen + 100, gfp);
6554         if (!skb)
6555                 return NULL;
6556
6557         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6558         if (!hdr) {
6559                 kfree_skb(skb);
6560                 return NULL;
6561         }
6562
6563         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6564                 goto nla_put_failure;
6565         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6566
6567         ((void **)skb->cb)[0] = rdev;
6568         ((void **)skb->cb)[1] = hdr;
6569         ((void **)skb->cb)[2] = data;
6570
6571         return skb;
6572
6573  nla_put_failure:
6574         kfree_skb(skb);
6575         return NULL;
6576 }
6577
6578 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6579                                                   int approxlen)
6580 {
6581         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6582
6583         if (WARN_ON(!rdev->testmode_info))
6584                 return NULL;
6585
6586         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6587                                 rdev->testmode_info->snd_portid,
6588                                 rdev->testmode_info->snd_seq,
6589                                 GFP_KERNEL);
6590 }
6591 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6592
6593 int cfg80211_testmode_reply(struct sk_buff *skb)
6594 {
6595         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6596         void *hdr = ((void **)skb->cb)[1];
6597         struct nlattr *data = ((void **)skb->cb)[2];
6598
6599         if (WARN_ON(!rdev->testmode_info)) {
6600                 kfree_skb(skb);
6601                 return -EINVAL;
6602         }
6603
6604         nla_nest_end(skb, data);
6605         genlmsg_end(skb, hdr);
6606         return genlmsg_reply(skb, rdev->testmode_info);
6607 }
6608 EXPORT_SYMBOL(cfg80211_testmode_reply);
6609
6610 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6611                                                   int approxlen, gfp_t gfp)
6612 {
6613         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6614
6615         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6616 }
6617 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6618
6619 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6620 {
6621         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6622         void *hdr = ((void **)skb->cb)[1];
6623         struct nlattr *data = ((void **)skb->cb)[2];
6624
6625         nla_nest_end(skb, data);
6626         genlmsg_end(skb, hdr);
6627         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
6628                                 nl80211_testmode_mcgrp.id, gfp);
6629 }
6630 EXPORT_SYMBOL(cfg80211_testmode_event);
6631 #endif
6632
6633 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6634 {
6635         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6636         struct net_device *dev = info->user_ptr[1];
6637         struct cfg80211_connect_params connect;
6638         struct wiphy *wiphy;
6639         struct cfg80211_cached_keys *connkeys = NULL;
6640         int err;
6641
6642         memset(&connect, 0, sizeof(connect));
6643
6644         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6645                 return -EINVAL;
6646
6647         if (!info->attrs[NL80211_ATTR_SSID] ||
6648             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6649                 return -EINVAL;
6650
6651         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6652                 connect.auth_type =
6653                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6654                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6655                                              NL80211_CMD_CONNECT))
6656                         return -EINVAL;
6657         } else
6658                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6659
6660         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6661
6662         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6663                                       NL80211_MAX_NR_CIPHER_SUITES);
6664         if (err)
6665                 return err;
6666
6667         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6668             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6669                 return -EOPNOTSUPP;
6670
6671         wiphy = &rdev->wiphy;
6672
6673         connect.bg_scan_period = -1;
6674         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6675                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6676                 connect.bg_scan_period =
6677                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6678         }
6679
6680         if (info->attrs[NL80211_ATTR_MAC])
6681                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6682         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6683         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6684
6685         if (info->attrs[NL80211_ATTR_IE]) {
6686                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6687                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6688         }
6689
6690         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6691                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6692                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6693                     connect.mfp != NL80211_MFP_NO)
6694                         return -EINVAL;
6695         } else {
6696                 connect.mfp = NL80211_MFP_NO;
6697         }
6698
6699         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6700                 connect.channel =
6701                         ieee80211_get_channel(wiphy,
6702                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6703                 if (!connect.channel ||
6704                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6705                         return -EINVAL;
6706         }
6707
6708         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6709                 connkeys = nl80211_parse_connkeys(rdev,
6710                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6711                 if (IS_ERR(connkeys))
6712                         return PTR_ERR(connkeys);
6713         }
6714
6715         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6716                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6717
6718         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6719                 memcpy(&connect.ht_capa_mask,
6720                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6721                        sizeof(connect.ht_capa_mask));
6722
6723         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6724                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6725                         kfree(connkeys);
6726                         return -EINVAL;
6727                 }
6728                 memcpy(&connect.ht_capa,
6729                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6730                        sizeof(connect.ht_capa));
6731         }
6732
6733         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6734                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6735
6736         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6737                 memcpy(&connect.vht_capa_mask,
6738                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6739                        sizeof(connect.vht_capa_mask));
6740
6741         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6742                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6743                         kfree(connkeys);
6744                         return -EINVAL;
6745                 }
6746                 memcpy(&connect.vht_capa,
6747                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6748                        sizeof(connect.vht_capa));
6749         }
6750
6751         wdev_lock(dev->ieee80211_ptr);
6752         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
6753         wdev_unlock(dev->ieee80211_ptr);
6754         if (err)
6755                 kfree(connkeys);
6756         return err;
6757 }
6758
6759 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6760 {
6761         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6762         struct net_device *dev = info->user_ptr[1];
6763         u16 reason;
6764         int ret;
6765
6766         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6767                 reason = WLAN_REASON_DEAUTH_LEAVING;
6768         else
6769                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6770
6771         if (reason == 0)
6772                 return -EINVAL;
6773
6774         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6775             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6776                 return -EOPNOTSUPP;
6777
6778         wdev_lock(dev->ieee80211_ptr);
6779         ret = cfg80211_disconnect(rdev, dev, reason, true);
6780         wdev_unlock(dev->ieee80211_ptr);
6781         return ret;
6782 }
6783
6784 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6785 {
6786         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6787         struct net *net;
6788         int err;
6789         u32 pid;
6790
6791         if (!info->attrs[NL80211_ATTR_PID])
6792                 return -EINVAL;
6793
6794         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6795
6796         net = get_net_ns_by_pid(pid);
6797         if (IS_ERR(net))
6798                 return PTR_ERR(net);
6799
6800         err = 0;
6801
6802         /* check if anything to do */
6803         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6804                 err = cfg80211_switch_netns(rdev, net);
6805
6806         put_net(net);
6807         return err;
6808 }
6809
6810 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6811 {
6812         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6813         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6814                         struct cfg80211_pmksa *pmksa) = NULL;
6815         struct net_device *dev = info->user_ptr[1];
6816         struct cfg80211_pmksa pmksa;
6817
6818         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6819
6820         if (!info->attrs[NL80211_ATTR_MAC])
6821                 return -EINVAL;
6822
6823         if (!info->attrs[NL80211_ATTR_PMKID])
6824                 return -EINVAL;
6825
6826         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6827         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6828
6829         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6830             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6831                 return -EOPNOTSUPP;
6832
6833         switch (info->genlhdr->cmd) {
6834         case NL80211_CMD_SET_PMKSA:
6835                 rdev_ops = rdev->ops->set_pmksa;
6836                 break;
6837         case NL80211_CMD_DEL_PMKSA:
6838                 rdev_ops = rdev->ops->del_pmksa;
6839                 break;
6840         default:
6841                 WARN_ON(1);
6842                 break;
6843         }
6844
6845         if (!rdev_ops)
6846                 return -EOPNOTSUPP;
6847
6848         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6849 }
6850
6851 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6852 {
6853         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6854         struct net_device *dev = info->user_ptr[1];
6855
6856         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6857             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6858                 return -EOPNOTSUPP;
6859
6860         if (!rdev->ops->flush_pmksa)
6861                 return -EOPNOTSUPP;
6862
6863         return rdev_flush_pmksa(rdev, dev);
6864 }
6865
6866 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6867 {
6868         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6869         struct net_device *dev = info->user_ptr[1];
6870         u8 action_code, dialog_token;
6871         u16 status_code;
6872         u8 *peer;
6873
6874         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6875             !rdev->ops->tdls_mgmt)
6876                 return -EOPNOTSUPP;
6877
6878         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6879             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6880             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6881             !info->attrs[NL80211_ATTR_IE] ||
6882             !info->attrs[NL80211_ATTR_MAC])
6883                 return -EINVAL;
6884
6885         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6886         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6887         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6888         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6889
6890         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6891                               dialog_token, status_code,
6892                               nla_data(info->attrs[NL80211_ATTR_IE]),
6893                               nla_len(info->attrs[NL80211_ATTR_IE]));
6894 }
6895
6896 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6897 {
6898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6899         struct net_device *dev = info->user_ptr[1];
6900         enum nl80211_tdls_operation operation;
6901         u8 *peer;
6902
6903         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6904             !rdev->ops->tdls_oper)
6905                 return -EOPNOTSUPP;
6906
6907         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6908             !info->attrs[NL80211_ATTR_MAC])
6909                 return -EINVAL;
6910
6911         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6912         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6913
6914         return rdev_tdls_oper(rdev, dev, peer, operation);
6915 }
6916
6917 static int nl80211_remain_on_channel(struct sk_buff *skb,
6918                                      struct genl_info *info)
6919 {
6920         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6921         struct wireless_dev *wdev = info->user_ptr[1];
6922         struct cfg80211_chan_def chandef;
6923         struct sk_buff *msg;
6924         void *hdr;
6925         u64 cookie;
6926         u32 duration;
6927         int err;
6928
6929         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6930             !info->attrs[NL80211_ATTR_DURATION])
6931                 return -EINVAL;
6932
6933         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6934
6935         if (!rdev->ops->remain_on_channel ||
6936             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6937                 return -EOPNOTSUPP;
6938
6939         /*
6940          * We should be on that channel for at least a minimum amount of
6941          * time (10ms) but no longer than the driver supports.
6942          */
6943         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6944             duration > rdev->wiphy.max_remain_on_channel_duration)
6945                 return -EINVAL;
6946
6947         err = nl80211_parse_chandef(rdev, info, &chandef);
6948         if (err)
6949                 return err;
6950
6951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6952         if (!msg)
6953                 return -ENOMEM;
6954
6955         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6956                              NL80211_CMD_REMAIN_ON_CHANNEL);
6957         if (!hdr) {
6958                 err = -ENOBUFS;
6959                 goto free_msg;
6960         }
6961
6962         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6963                                      duration, &cookie);
6964
6965         if (err)
6966                 goto free_msg;
6967
6968         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6969                 goto nla_put_failure;
6970
6971         genlmsg_end(msg, hdr);
6972
6973         return genlmsg_reply(msg, info);
6974
6975  nla_put_failure:
6976         err = -ENOBUFS;
6977  free_msg:
6978         nlmsg_free(msg);
6979         return err;
6980 }
6981
6982 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6983                                             struct genl_info *info)
6984 {
6985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6986         struct wireless_dev *wdev = info->user_ptr[1];
6987         u64 cookie;
6988
6989         if (!info->attrs[NL80211_ATTR_COOKIE])
6990                 return -EINVAL;
6991
6992         if (!rdev->ops->cancel_remain_on_channel)
6993                 return -EOPNOTSUPP;
6994
6995         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6996
6997         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6998 }
6999
7000 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7001                            u8 *rates, u8 rates_len)
7002 {
7003         u8 i;
7004         u32 mask = 0;
7005
7006         for (i = 0; i < rates_len; i++) {
7007                 int rate = (rates[i] & 0x7f) * 5;
7008                 int ridx;
7009                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7010                         struct ieee80211_rate *srate =
7011                                 &sband->bitrates[ridx];
7012                         if (rate == srate->bitrate) {
7013                                 mask |= 1 << ridx;
7014                                 break;
7015                         }
7016                 }
7017                 if (ridx == sband->n_bitrates)
7018                         return 0; /* rate not found */
7019         }
7020
7021         return mask;
7022 }
7023
7024 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7025                                u8 *rates, u8 rates_len,
7026                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7027 {
7028         u8 i;
7029
7030         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7031
7032         for (i = 0; i < rates_len; i++) {
7033                 int ridx, rbit;
7034
7035                 ridx = rates[i] / 8;
7036                 rbit = BIT(rates[i] % 8);
7037
7038                 /* check validity */
7039                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7040                         return false;
7041
7042                 /* check availability */
7043                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7044                         mcs[ridx] |= rbit;
7045                 else
7046                         return false;
7047         }
7048
7049         return true;
7050 }
7051
7052 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7053         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7054                                     .len = NL80211_MAX_SUPP_RATES },
7055         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7056                                  .len = NL80211_MAX_SUPP_HT_RATES },
7057 };
7058
7059 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7060                                        struct genl_info *info)
7061 {
7062         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7063         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7064         struct cfg80211_bitrate_mask mask;
7065         int rem, i;
7066         struct net_device *dev = info->user_ptr[1];
7067         struct nlattr *tx_rates;
7068         struct ieee80211_supported_band *sband;
7069
7070         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7071                 return -EINVAL;
7072
7073         if (!rdev->ops->set_bitrate_mask)
7074                 return -EOPNOTSUPP;
7075
7076         memset(&mask, 0, sizeof(mask));
7077         /* Default to all rates enabled */
7078         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7079                 sband = rdev->wiphy.bands[i];
7080                 mask.control[i].legacy =
7081                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7082                 if (sband)
7083                         memcpy(mask.control[i].mcs,
7084                                sband->ht_cap.mcs.rx_mask,
7085                                sizeof(mask.control[i].mcs));
7086                 else
7087                         memset(mask.control[i].mcs, 0,
7088                                sizeof(mask.control[i].mcs));
7089         }
7090
7091         /*
7092          * The nested attribute uses enum nl80211_band as the index. This maps
7093          * directly to the enum ieee80211_band values used in cfg80211.
7094          */
7095         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7096         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7097         {
7098                 enum ieee80211_band band = nla_type(tx_rates);
7099                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7100                         return -EINVAL;
7101                 sband = rdev->wiphy.bands[band];
7102                 if (sband == NULL)
7103                         return -EINVAL;
7104                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7105                           nla_len(tx_rates), nl80211_txattr_policy);
7106                 if (tb[NL80211_TXRATE_LEGACY]) {
7107                         mask.control[band].legacy = rateset_to_mask(
7108                                 sband,
7109                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7110                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7111                         if ((mask.control[band].legacy == 0) &&
7112                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7113                                 return -EINVAL;
7114                 }
7115                 if (tb[NL80211_TXRATE_MCS]) {
7116                         if (!ht_rateset_to_mask(
7117                                         sband,
7118                                         nla_data(tb[NL80211_TXRATE_MCS]),
7119                                         nla_len(tb[NL80211_TXRATE_MCS]),
7120                                         mask.control[band].mcs))
7121                                 return -EINVAL;
7122                 }
7123
7124                 if (mask.control[band].legacy == 0) {
7125                         /* don't allow empty legacy rates if HT
7126                          * is not even supported. */
7127                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7128                                 return -EINVAL;
7129
7130                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7131                                 if (mask.control[band].mcs[i])
7132                                         break;
7133
7134                         /* legacy and mcs rates may not be both empty */
7135                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7136                                 return -EINVAL;
7137                 }
7138         }
7139
7140         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7141 }
7142
7143 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7144 {
7145         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7146         struct wireless_dev *wdev = info->user_ptr[1];
7147         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7148
7149         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7150                 return -EINVAL;
7151
7152         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7153                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7154
7155         switch (wdev->iftype) {
7156         case NL80211_IFTYPE_STATION:
7157         case NL80211_IFTYPE_ADHOC:
7158         case NL80211_IFTYPE_P2P_CLIENT:
7159         case NL80211_IFTYPE_AP:
7160         case NL80211_IFTYPE_AP_VLAN:
7161         case NL80211_IFTYPE_MESH_POINT:
7162         case NL80211_IFTYPE_P2P_GO:
7163         case NL80211_IFTYPE_P2P_DEVICE:
7164                 break;
7165         default:
7166                 return -EOPNOTSUPP;
7167         }
7168
7169         /* not much point in registering if we can't reply */
7170         if (!rdev->ops->mgmt_tx)
7171                 return -EOPNOTSUPP;
7172
7173         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7174                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7175                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7176 }
7177
7178 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7179 {
7180         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7181         struct wireless_dev *wdev = info->user_ptr[1];
7182         struct cfg80211_chan_def chandef;
7183         int err;
7184         void *hdr = NULL;
7185         u64 cookie;
7186         struct sk_buff *msg = NULL;
7187         unsigned int wait = 0;
7188         bool offchan, no_cck, dont_wait_for_ack;
7189
7190         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7191
7192         if (!info->attrs[NL80211_ATTR_FRAME])
7193                 return -EINVAL;
7194
7195         if (!rdev->ops->mgmt_tx)
7196                 return -EOPNOTSUPP;
7197
7198         switch (wdev->iftype) {
7199         case NL80211_IFTYPE_P2P_DEVICE:
7200                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7201                         return -EINVAL;
7202         case NL80211_IFTYPE_STATION:
7203         case NL80211_IFTYPE_ADHOC:
7204         case NL80211_IFTYPE_P2P_CLIENT:
7205         case NL80211_IFTYPE_AP:
7206         case NL80211_IFTYPE_AP_VLAN:
7207         case NL80211_IFTYPE_MESH_POINT:
7208         case NL80211_IFTYPE_P2P_GO:
7209                 break;
7210         default:
7211                 return -EOPNOTSUPP;
7212         }
7213
7214         if (info->attrs[NL80211_ATTR_DURATION]) {
7215                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7216                         return -EINVAL;
7217                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7218
7219                 /*
7220                  * We should wait on the channel for at least a minimum amount
7221                  * of time (10ms) but no longer than the driver supports.
7222                  */
7223                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7224                     wait > rdev->wiphy.max_remain_on_channel_duration)
7225                         return -EINVAL;
7226
7227         }
7228
7229         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7230
7231         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7232                 return -EINVAL;
7233
7234         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7235
7236         /* get the channel if any has been specified, otherwise pass NULL to
7237          * the driver. The latter will use the current one
7238          */
7239         chandef.chan = NULL;
7240         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7241                 err = nl80211_parse_chandef(rdev, info, &chandef);
7242                 if (err)
7243                         return err;
7244         }
7245
7246         if (!chandef.chan && offchan)
7247                 return -EINVAL;
7248
7249         if (!dont_wait_for_ack) {
7250                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7251                 if (!msg)
7252                         return -ENOMEM;
7253
7254                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7255                                      NL80211_CMD_FRAME);
7256                 if (!hdr) {
7257                         err = -ENOBUFS;
7258                         goto free_msg;
7259                 }
7260         }
7261
7262         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7263                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7264                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7265                                     no_cck, dont_wait_for_ack, &cookie);
7266         if (err)
7267                 goto free_msg;
7268
7269         if (msg) {
7270                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7271                         goto nla_put_failure;
7272
7273                 genlmsg_end(msg, hdr);
7274                 return genlmsg_reply(msg, info);
7275         }
7276
7277         return 0;
7278
7279  nla_put_failure:
7280         err = -ENOBUFS;
7281  free_msg:
7282         nlmsg_free(msg);
7283         return err;
7284 }
7285
7286 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7287 {
7288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7289         struct wireless_dev *wdev = info->user_ptr[1];
7290         u64 cookie;
7291
7292         if (!info->attrs[NL80211_ATTR_COOKIE])
7293                 return -EINVAL;
7294
7295         if (!rdev->ops->mgmt_tx_cancel_wait)
7296                 return -EOPNOTSUPP;
7297
7298         switch (wdev->iftype) {
7299         case NL80211_IFTYPE_STATION:
7300         case NL80211_IFTYPE_ADHOC:
7301         case NL80211_IFTYPE_P2P_CLIENT:
7302         case NL80211_IFTYPE_AP:
7303         case NL80211_IFTYPE_AP_VLAN:
7304         case NL80211_IFTYPE_P2P_GO:
7305         case NL80211_IFTYPE_P2P_DEVICE:
7306                 break;
7307         default:
7308                 return -EOPNOTSUPP;
7309         }
7310
7311         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7312
7313         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7314 }
7315
7316 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7317 {
7318         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7319         struct wireless_dev *wdev;
7320         struct net_device *dev = info->user_ptr[1];
7321         u8 ps_state;
7322         bool state;
7323         int err;
7324
7325         if (!info->attrs[NL80211_ATTR_PS_STATE])
7326                 return -EINVAL;
7327
7328         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7329
7330         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7331                 return -EINVAL;
7332
7333         wdev = dev->ieee80211_ptr;
7334
7335         if (!rdev->ops->set_power_mgmt)
7336                 return -EOPNOTSUPP;
7337
7338         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7339
7340         if (state == wdev->ps)
7341                 return 0;
7342
7343         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7344         if (!err)
7345                 wdev->ps = state;
7346         return err;
7347 }
7348
7349 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7350 {
7351         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7352         enum nl80211_ps_state ps_state;
7353         struct wireless_dev *wdev;
7354         struct net_device *dev = info->user_ptr[1];
7355         struct sk_buff *msg;
7356         void *hdr;
7357         int err;
7358
7359         wdev = dev->ieee80211_ptr;
7360
7361         if (!rdev->ops->set_power_mgmt)
7362                 return -EOPNOTSUPP;
7363
7364         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7365         if (!msg)
7366                 return -ENOMEM;
7367
7368         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7369                              NL80211_CMD_GET_POWER_SAVE);
7370         if (!hdr) {
7371                 err = -ENOBUFS;
7372                 goto free_msg;
7373         }
7374
7375         if (wdev->ps)
7376                 ps_state = NL80211_PS_ENABLED;
7377         else
7378                 ps_state = NL80211_PS_DISABLED;
7379
7380         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7381                 goto nla_put_failure;
7382
7383         genlmsg_end(msg, hdr);
7384         return genlmsg_reply(msg, info);
7385
7386  nla_put_failure:
7387         err = -ENOBUFS;
7388  free_msg:
7389         nlmsg_free(msg);
7390         return err;
7391 }
7392
7393 static struct nla_policy
7394 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7395         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7396         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7397         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7398         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7399         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7400         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7401 };
7402
7403 static int nl80211_set_cqm_txe(struct genl_info *info,
7404                                u32 rate, u32 pkts, u32 intvl)
7405 {
7406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7407         struct wireless_dev *wdev;
7408         struct net_device *dev = info->user_ptr[1];
7409
7410         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7411                 return -EINVAL;
7412
7413         wdev = dev->ieee80211_ptr;
7414
7415         if (!rdev->ops->set_cqm_txe_config)
7416                 return -EOPNOTSUPP;
7417
7418         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7419             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7420                 return -EOPNOTSUPP;
7421
7422         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7423 }
7424
7425 static int nl80211_set_cqm_rssi(struct genl_info *info,
7426                                 s32 threshold, u32 hysteresis)
7427 {
7428         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7429         struct wireless_dev *wdev;
7430         struct net_device *dev = info->user_ptr[1];
7431
7432         if (threshold > 0)
7433                 return -EINVAL;
7434
7435         wdev = dev->ieee80211_ptr;
7436
7437         if (!rdev->ops->set_cqm_rssi_config)
7438                 return -EOPNOTSUPP;
7439
7440         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7441             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7442                 return -EOPNOTSUPP;
7443
7444         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7445 }
7446
7447 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7448 {
7449         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7450         struct nlattr *cqm;
7451         int err;
7452
7453         cqm = info->attrs[NL80211_ATTR_CQM];
7454         if (!cqm) {
7455                 err = -EINVAL;
7456                 goto out;
7457         }
7458
7459         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7460                                nl80211_attr_cqm_policy);
7461         if (err)
7462                 goto out;
7463
7464         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7465             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7466                 s32 threshold;
7467                 u32 hysteresis;
7468                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7469                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7470                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7471         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7472                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7473                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7474                 u32 rate, pkts, intvl;
7475                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7476                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7477                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7478                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7479         } else
7480                 err = -EINVAL;
7481
7482 out:
7483         return err;
7484 }
7485
7486 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7487 {
7488         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7489         struct net_device *dev = info->user_ptr[1];
7490         struct mesh_config cfg;
7491         struct mesh_setup setup;
7492         int err;
7493
7494         /* start with default */
7495         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7496         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7497
7498         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7499                 /* and parse parameters if given */
7500                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7501                 if (err)
7502                         return err;
7503         }
7504
7505         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7506             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7507                 return -EINVAL;
7508
7509         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7510         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7511
7512         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7513             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7514                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7515                         return -EINVAL;
7516
7517         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7518                 setup.beacon_interval =
7519                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7520                 if (setup.beacon_interval < 10 ||
7521                     setup.beacon_interval > 10000)
7522                         return -EINVAL;
7523         }
7524
7525         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7526                 setup.dtim_period =
7527                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7528                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7529                         return -EINVAL;
7530         }
7531
7532         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7533                 /* parse additional setup parameters if given */
7534                 err = nl80211_parse_mesh_setup(info, &setup);
7535                 if (err)
7536                         return err;
7537         }
7538
7539         if (setup.user_mpm)
7540                 cfg.auto_open_plinks = false;
7541
7542         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7543                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7544                 if (err)
7545                         return err;
7546         } else {
7547                 /* cfg80211_join_mesh() will sort it out */
7548                 setup.chandef.chan = NULL;
7549         }
7550
7551         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7552                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7553                 int n_rates =
7554                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7555                 struct ieee80211_supported_band *sband;
7556
7557                 if (!setup.chandef.chan)
7558                         return -EINVAL;
7559
7560                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7561
7562                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7563                                              &setup.basic_rates);
7564                 if (err)
7565                         return err;
7566         }
7567
7568         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7569 }
7570
7571 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7572 {
7573         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7574         struct net_device *dev = info->user_ptr[1];
7575
7576         return cfg80211_leave_mesh(rdev, dev);
7577 }
7578
7579 #ifdef CONFIG_PM
7580 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7581                                         struct cfg80211_registered_device *rdev)
7582 {
7583         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7584         struct nlattr *nl_pats, *nl_pat;
7585         int i, pat_len;
7586
7587         if (!wowlan->n_patterns)
7588                 return 0;
7589
7590         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7591         if (!nl_pats)
7592                 return -ENOBUFS;
7593
7594         for (i = 0; i < wowlan->n_patterns; i++) {
7595                 nl_pat = nla_nest_start(msg, i + 1);
7596                 if (!nl_pat)
7597                         return -ENOBUFS;
7598                 pat_len = wowlan->patterns[i].pattern_len;
7599                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7600                             DIV_ROUND_UP(pat_len, 8),
7601                             wowlan->patterns[i].mask) ||
7602                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7603                             pat_len, wowlan->patterns[i].pattern) ||
7604                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7605                                 wowlan->patterns[i].pkt_offset))
7606                         return -ENOBUFS;
7607                 nla_nest_end(msg, nl_pat);
7608         }
7609         nla_nest_end(msg, nl_pats);
7610
7611         return 0;
7612 }
7613
7614 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7615                                    struct cfg80211_wowlan_tcp *tcp)
7616 {
7617         struct nlattr *nl_tcp;
7618
7619         if (!tcp)
7620                 return 0;
7621
7622         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7623         if (!nl_tcp)
7624                 return -ENOBUFS;
7625
7626         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7627             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7628             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7629             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7630             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7631             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7632                     tcp->payload_len, tcp->payload) ||
7633             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7634                         tcp->data_interval) ||
7635             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7636                     tcp->wake_len, tcp->wake_data) ||
7637             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7638                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7639                 return -ENOBUFS;
7640
7641         if (tcp->payload_seq.len &&
7642             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7643                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7644                 return -ENOBUFS;
7645
7646         if (tcp->payload_tok.len &&
7647             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7648                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7649                     &tcp->payload_tok))
7650                 return -ENOBUFS;
7651
7652         nla_nest_end(msg, nl_tcp);
7653
7654         return 0;
7655 }
7656
7657 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7658 {
7659         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7660         struct sk_buff *msg;
7661         void *hdr;
7662         u32 size = NLMSG_DEFAULT_SIZE;
7663
7664         if (!rdev->wiphy.wowlan)
7665                 return -EOPNOTSUPP;
7666
7667         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7668                 /* adjust size to have room for all the data */
7669                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7670                         rdev->wiphy.wowlan_config->tcp->payload_len +
7671                         rdev->wiphy.wowlan_config->tcp->wake_len +
7672                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7673         }
7674
7675         msg = nlmsg_new(size, GFP_KERNEL);
7676         if (!msg)
7677                 return -ENOMEM;
7678
7679         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7680                              NL80211_CMD_GET_WOWLAN);
7681         if (!hdr)
7682                 goto nla_put_failure;
7683
7684         if (rdev->wiphy.wowlan_config) {
7685                 struct nlattr *nl_wowlan;
7686
7687                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7688                 if (!nl_wowlan)
7689                         goto nla_put_failure;
7690
7691                 if ((rdev->wiphy.wowlan_config->any &&
7692                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7693                     (rdev->wiphy.wowlan_config->disconnect &&
7694                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7695                     (rdev->wiphy.wowlan_config->magic_pkt &&
7696                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7697                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7698                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7699                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7700                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7701                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7702                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7703                     (rdev->wiphy.wowlan_config->rfkill_release &&
7704                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7705                         goto nla_put_failure;
7706
7707                 if (nl80211_send_wowlan_patterns(msg, rdev))
7708                         goto nla_put_failure;
7709
7710                 if (nl80211_send_wowlan_tcp(msg,
7711                                             rdev->wiphy.wowlan_config->tcp))
7712                         goto nla_put_failure;
7713
7714                 nla_nest_end(msg, nl_wowlan);
7715         }
7716
7717         genlmsg_end(msg, hdr);
7718         return genlmsg_reply(msg, info);
7719
7720 nla_put_failure:
7721         nlmsg_free(msg);
7722         return -ENOBUFS;
7723 }
7724
7725 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7726                                     struct nlattr *attr,
7727                                     struct cfg80211_wowlan *trig)
7728 {
7729         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7730         struct cfg80211_wowlan_tcp *cfg;
7731         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7732         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7733         u32 size;
7734         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7735         int err, port;
7736
7737         if (!rdev->wiphy.wowlan->tcp)
7738                 return -EINVAL;
7739
7740         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7741                         nla_data(attr), nla_len(attr),
7742                         nl80211_wowlan_tcp_policy);
7743         if (err)
7744                 return err;
7745
7746         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7747             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7748             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7749             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7750             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7751             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7752             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7753             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7754                 return -EINVAL;
7755
7756         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7757         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
7758                 return -EINVAL;
7759
7760         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7761                         rdev->wiphy.wowlan->tcp->data_interval_max ||
7762             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7763                 return -EINVAL;
7764
7765         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7766         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
7767                 return -EINVAL;
7768
7769         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7770         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7771                 return -EINVAL;
7772
7773         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7774                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7775
7776                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7777                 tokens_size = tokln - sizeof(*tok);
7778
7779                 if (!tok->len || tokens_size % tok->len)
7780                         return -EINVAL;
7781                 if (!rdev->wiphy.wowlan->tcp->tok)
7782                         return -EINVAL;
7783                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
7784                         return -EINVAL;
7785                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
7786                         return -EINVAL;
7787                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
7788                         return -EINVAL;
7789                 if (tok->offset + tok->len > data_size)
7790                         return -EINVAL;
7791         }
7792
7793         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7794                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7795                 if (!rdev->wiphy.wowlan->tcp->seq)
7796                         return -EINVAL;
7797                 if (seq->len == 0 || seq->len > 4)
7798                         return -EINVAL;
7799                 if (seq->len + seq->offset > data_size)
7800                         return -EINVAL;
7801         }
7802
7803         size = sizeof(*cfg);
7804         size += data_size;
7805         size += wake_size + wake_mask_size;
7806         size += tokens_size;
7807
7808         cfg = kzalloc(size, GFP_KERNEL);
7809         if (!cfg)
7810                 return -ENOMEM;
7811         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7812         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7813         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7814                ETH_ALEN);
7815         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7816                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7817         else
7818                 port = 0;
7819 #ifdef CONFIG_INET
7820         /* allocate a socket and port for it and use it */
7821         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7822                             IPPROTO_TCP, &cfg->sock, 1);
7823         if (err) {
7824                 kfree(cfg);
7825                 return err;
7826         }
7827         if (inet_csk_get_port(cfg->sock->sk, port)) {
7828                 sock_release(cfg->sock);
7829                 kfree(cfg);
7830                 return -EADDRINUSE;
7831         }
7832         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7833 #else
7834         if (!port) {
7835                 kfree(cfg);
7836                 return -EINVAL;
7837         }
7838         cfg->src_port = port;
7839 #endif
7840
7841         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7842         cfg->payload_len = data_size;
7843         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7844         memcpy((void *)cfg->payload,
7845                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7846                data_size);
7847         if (seq)
7848                 cfg->payload_seq = *seq;
7849         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7850         cfg->wake_len = wake_size;
7851         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7852         memcpy((void *)cfg->wake_data,
7853                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7854                wake_size);
7855         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7856                          data_size + wake_size;
7857         memcpy((void *)cfg->wake_mask,
7858                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7859                wake_mask_size);
7860         if (tok) {
7861                 cfg->tokens_size = tokens_size;
7862                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7863         }
7864
7865         trig->tcp = cfg;
7866
7867         return 0;
7868 }
7869
7870 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7871 {
7872         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7873         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7874         struct cfg80211_wowlan new_triggers = {};
7875         struct cfg80211_wowlan *ntrig;
7876         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
7877         int err, i;
7878         bool prev_enabled = rdev->wiphy.wowlan_config;
7879
7880         if (!wowlan)
7881                 return -EOPNOTSUPP;
7882
7883         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7884                 cfg80211_rdev_free_wowlan(rdev);
7885                 rdev->wiphy.wowlan_config = NULL;
7886                 goto set_wakeup;
7887         }
7888
7889         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7890                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7891                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7892                         nl80211_wowlan_policy);
7893         if (err)
7894                 return err;
7895
7896         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7897                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7898                         return -EINVAL;
7899                 new_triggers.any = true;
7900         }
7901
7902         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7903                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7904                         return -EINVAL;
7905                 new_triggers.disconnect = true;
7906         }
7907
7908         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7909                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7910                         return -EINVAL;
7911                 new_triggers.magic_pkt = true;
7912         }
7913
7914         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7915                 return -EINVAL;
7916
7917         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7918                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7919                         return -EINVAL;
7920                 new_triggers.gtk_rekey_failure = true;
7921         }
7922
7923         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7924                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7925                         return -EINVAL;
7926                 new_triggers.eap_identity_req = true;
7927         }
7928
7929         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7930                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7931                         return -EINVAL;
7932                 new_triggers.four_way_handshake = true;
7933         }
7934
7935         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7936                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7937                         return -EINVAL;
7938                 new_triggers.rfkill_release = true;
7939         }
7940
7941         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7942                 struct nlattr *pat;
7943                 int n_patterns = 0;
7944                 int rem, pat_len, mask_len, pkt_offset;
7945                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7946
7947                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7948                                     rem)
7949                         n_patterns++;
7950                 if (n_patterns > wowlan->n_patterns)
7951                         return -EINVAL;
7952
7953                 new_triggers.patterns = kcalloc(n_patterns,
7954                                                 sizeof(new_triggers.patterns[0]),
7955                                                 GFP_KERNEL);
7956                 if (!new_triggers.patterns)
7957                         return -ENOMEM;
7958
7959                 new_triggers.n_patterns = n_patterns;
7960                 i = 0;
7961
7962                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7963                                     rem) {
7964                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7965                                   nla_data(pat), nla_len(pat), NULL);
7966                         err = -EINVAL;
7967                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7968                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7969                                 goto error;
7970                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7971                         mask_len = DIV_ROUND_UP(pat_len, 8);
7972                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7973                             mask_len)
7974                                 goto error;
7975                         if (pat_len > wowlan->pattern_max_len ||
7976                             pat_len < wowlan->pattern_min_len)
7977                                 goto error;
7978
7979                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7980                                 pkt_offset = 0;
7981                         else
7982                                 pkt_offset = nla_get_u32(
7983                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7984                         if (pkt_offset > wowlan->max_pkt_offset)
7985                                 goto error;
7986                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7987
7988                         new_triggers.patterns[i].mask =
7989                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7990                         if (!new_triggers.patterns[i].mask) {
7991                                 err = -ENOMEM;
7992                                 goto error;
7993                         }
7994                         new_triggers.patterns[i].pattern =
7995                                 new_triggers.patterns[i].mask + mask_len;
7996                         memcpy(new_triggers.patterns[i].mask,
7997                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7998                                mask_len);
7999                         new_triggers.patterns[i].pattern_len = pat_len;
8000                         memcpy(new_triggers.patterns[i].pattern,
8001                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
8002                                pat_len);
8003                         i++;
8004                 }
8005         }
8006
8007         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8008                 err = nl80211_parse_wowlan_tcp(
8009                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8010                         &new_triggers);
8011                 if (err)
8012                         goto error;
8013         }
8014
8015         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8016         if (!ntrig) {
8017                 err = -ENOMEM;
8018                 goto error;
8019         }
8020         cfg80211_rdev_free_wowlan(rdev);
8021         rdev->wiphy.wowlan_config = ntrig;
8022
8023  set_wakeup:
8024         if (rdev->ops->set_wakeup &&
8025             prev_enabled != !!rdev->wiphy.wowlan_config)
8026                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8027
8028         return 0;
8029  error:
8030         for (i = 0; i < new_triggers.n_patterns; i++)
8031                 kfree(new_triggers.patterns[i].mask);
8032         kfree(new_triggers.patterns);
8033         if (new_triggers.tcp && new_triggers.tcp->sock)
8034                 sock_release(new_triggers.tcp->sock);
8035         kfree(new_triggers.tcp);
8036         return err;
8037 }
8038 #endif
8039
8040 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8041 {
8042         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8043         struct net_device *dev = info->user_ptr[1];
8044         struct wireless_dev *wdev = dev->ieee80211_ptr;
8045         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8046         struct cfg80211_gtk_rekey_data rekey_data;
8047         int err;
8048
8049         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8050                 return -EINVAL;
8051
8052         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8053                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8054                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8055                         nl80211_rekey_policy);
8056         if (err)
8057                 return err;
8058
8059         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8060                 return -ERANGE;
8061         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8062                 return -ERANGE;
8063         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8064                 return -ERANGE;
8065
8066         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8067                NL80211_KEK_LEN);
8068         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8069                NL80211_KCK_LEN);
8070         memcpy(rekey_data.replay_ctr,
8071                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8072                NL80211_REPLAY_CTR_LEN);
8073
8074         wdev_lock(wdev);
8075         if (!wdev->current_bss) {
8076                 err = -ENOTCONN;
8077                 goto out;
8078         }
8079
8080         if (!rdev->ops->set_rekey_data) {
8081                 err = -EOPNOTSUPP;
8082                 goto out;
8083         }
8084
8085         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8086  out:
8087         wdev_unlock(wdev);
8088         return err;
8089 }
8090
8091 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8092                                              struct genl_info *info)
8093 {
8094         struct net_device *dev = info->user_ptr[1];
8095         struct wireless_dev *wdev = dev->ieee80211_ptr;
8096
8097         if (wdev->iftype != NL80211_IFTYPE_AP &&
8098             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8099                 return -EINVAL;
8100
8101         if (wdev->ap_unexpected_nlportid)
8102                 return -EBUSY;
8103
8104         wdev->ap_unexpected_nlportid = info->snd_portid;
8105         return 0;
8106 }
8107
8108 static int nl80211_probe_client(struct sk_buff *skb,
8109                                 struct genl_info *info)
8110 {
8111         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8112         struct net_device *dev = info->user_ptr[1];
8113         struct wireless_dev *wdev = dev->ieee80211_ptr;
8114         struct sk_buff *msg;
8115         void *hdr;
8116         const u8 *addr;
8117         u64 cookie;
8118         int err;
8119
8120         if (wdev->iftype != NL80211_IFTYPE_AP &&
8121             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8122                 return -EOPNOTSUPP;
8123
8124         if (!info->attrs[NL80211_ATTR_MAC])
8125                 return -EINVAL;
8126
8127         if (!rdev->ops->probe_client)
8128                 return -EOPNOTSUPP;
8129
8130         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8131         if (!msg)
8132                 return -ENOMEM;
8133
8134         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8135                              NL80211_CMD_PROBE_CLIENT);
8136         if (!hdr) {
8137                 err = -ENOBUFS;
8138                 goto free_msg;
8139         }
8140
8141         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8142
8143         err = rdev_probe_client(rdev, dev, addr, &cookie);
8144         if (err)
8145                 goto free_msg;
8146
8147         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8148                 goto nla_put_failure;
8149
8150         genlmsg_end(msg, hdr);
8151
8152         return genlmsg_reply(msg, info);
8153
8154  nla_put_failure:
8155         err = -ENOBUFS;
8156  free_msg:
8157         nlmsg_free(msg);
8158         return err;
8159 }
8160
8161 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8162 {
8163         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8164         struct cfg80211_beacon_registration *reg, *nreg;
8165         int rv;
8166
8167         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8168                 return -EOPNOTSUPP;
8169
8170         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8171         if (!nreg)
8172                 return -ENOMEM;
8173
8174         /* First, check if already registered. */
8175         spin_lock_bh(&rdev->beacon_registrations_lock);
8176         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8177                 if (reg->nlportid == info->snd_portid) {
8178                         rv = -EALREADY;
8179                         goto out_err;
8180                 }
8181         }
8182         /* Add it to the list */
8183         nreg->nlportid = info->snd_portid;
8184         list_add(&nreg->list, &rdev->beacon_registrations);
8185
8186         spin_unlock_bh(&rdev->beacon_registrations_lock);
8187
8188         return 0;
8189 out_err:
8190         spin_unlock_bh(&rdev->beacon_registrations_lock);
8191         kfree(nreg);
8192         return rv;
8193 }
8194
8195 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8196 {
8197         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8198         struct wireless_dev *wdev = info->user_ptr[1];
8199         int err;
8200
8201         if (!rdev->ops->start_p2p_device)
8202                 return -EOPNOTSUPP;
8203
8204         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8205                 return -EOPNOTSUPP;
8206
8207         if (wdev->p2p_started)
8208                 return 0;
8209
8210         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8211         if (err)
8212                 return err;
8213
8214         err = rdev_start_p2p_device(rdev, wdev);
8215         if (err)
8216                 return err;
8217
8218         wdev->p2p_started = true;
8219         rdev->opencount++;
8220
8221         return 0;
8222 }
8223
8224 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8225 {
8226         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8227         struct wireless_dev *wdev = info->user_ptr[1];
8228
8229         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8230                 return -EOPNOTSUPP;
8231
8232         if (!rdev->ops->stop_p2p_device)
8233                 return -EOPNOTSUPP;
8234
8235         cfg80211_stop_p2p_device(rdev, wdev);
8236
8237         return 0;
8238 }
8239
8240 static int nl80211_get_protocol_features(struct sk_buff *skb,
8241                                          struct genl_info *info)
8242 {
8243         void *hdr;
8244         struct sk_buff *msg;
8245
8246         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8247         if (!msg)
8248                 return -ENOMEM;
8249
8250         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8251                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8252         if (!hdr)
8253                 goto nla_put_failure;
8254
8255         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8256                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8257                 goto nla_put_failure;
8258
8259         genlmsg_end(msg, hdr);
8260         return genlmsg_reply(msg, info);
8261
8262  nla_put_failure:
8263         kfree_skb(msg);
8264         return -ENOBUFS;
8265 }
8266
8267 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8268 {
8269         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8270         struct cfg80211_update_ft_ies_params ft_params;
8271         struct net_device *dev = info->user_ptr[1];
8272
8273         if (!rdev->ops->update_ft_ies)
8274                 return -EOPNOTSUPP;
8275
8276         if (!info->attrs[NL80211_ATTR_MDID] ||
8277             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8278                 return -EINVAL;
8279
8280         memset(&ft_params, 0, sizeof(ft_params));
8281         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8282         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8283         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8284
8285         return rdev_update_ft_ies(rdev, dev, &ft_params);
8286 }
8287
8288 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8289                                        struct genl_info *info)
8290 {
8291         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8292         struct wireless_dev *wdev = info->user_ptr[1];
8293         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8294         u16 duration;
8295         int ret;
8296
8297         if (!rdev->ops->crit_proto_start)
8298                 return -EOPNOTSUPP;
8299
8300         if (WARN_ON(!rdev->ops->crit_proto_stop))
8301                 return -EINVAL;
8302
8303         if (rdev->crit_proto_nlportid)
8304                 return -EBUSY;
8305
8306         /* determine protocol if provided */
8307         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8308                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8309
8310         if (proto >= NUM_NL80211_CRIT_PROTO)
8311                 return -EINVAL;
8312
8313         /* timeout must be provided */
8314         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8315                 return -EINVAL;
8316
8317         duration =
8318                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8319
8320         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8321                 return -ERANGE;
8322
8323         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8324         if (!ret)
8325                 rdev->crit_proto_nlportid = info->snd_portid;
8326
8327         return ret;
8328 }
8329
8330 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8331                                       struct genl_info *info)
8332 {
8333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8334         struct wireless_dev *wdev = info->user_ptr[1];
8335
8336         if (!rdev->ops->crit_proto_stop)
8337                 return -EOPNOTSUPP;
8338
8339         if (rdev->crit_proto_nlportid) {
8340                 rdev->crit_proto_nlportid = 0;
8341                 rdev_crit_proto_stop(rdev, wdev);
8342         }
8343         return 0;
8344 }
8345
8346 #define NL80211_FLAG_NEED_WIPHY         0x01
8347 #define NL80211_FLAG_NEED_NETDEV        0x02
8348 #define NL80211_FLAG_NEED_RTNL          0x04
8349 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8350 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8351                                          NL80211_FLAG_CHECK_NETDEV_UP)
8352 #define NL80211_FLAG_NEED_WDEV          0x10
8353 /* If a netdev is associated, it must be UP, P2P must be started */
8354 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8355                                          NL80211_FLAG_CHECK_NETDEV_UP)
8356
8357 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8358                             struct genl_info *info)
8359 {
8360         struct cfg80211_registered_device *rdev;
8361         struct wireless_dev *wdev;
8362         struct net_device *dev;
8363         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8364
8365         if (rtnl)
8366                 rtnl_lock();
8367
8368         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8369                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8370                 if (IS_ERR(rdev)) {
8371                         if (rtnl)
8372                                 rtnl_unlock();
8373                         return PTR_ERR(rdev);
8374                 }
8375                 info->user_ptr[0] = rdev;
8376         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8377                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8378                 ASSERT_RTNL();
8379
8380                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8381                                                   info->attrs);
8382                 if (IS_ERR(wdev)) {
8383                         if (rtnl)
8384                                 rtnl_unlock();
8385                         return PTR_ERR(wdev);
8386                 }
8387
8388                 dev = wdev->netdev;
8389                 rdev = wiphy_to_dev(wdev->wiphy);
8390
8391                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8392                         if (!dev) {
8393                                 if (rtnl)
8394                                         rtnl_unlock();
8395                                 return -EINVAL;
8396                         }
8397
8398                         info->user_ptr[1] = dev;
8399                 } else {
8400                         info->user_ptr[1] = wdev;
8401                 }
8402
8403                 if (dev) {
8404                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8405                             !netif_running(dev)) {
8406                                 if (rtnl)
8407                                         rtnl_unlock();
8408                                 return -ENETDOWN;
8409                         }
8410
8411                         dev_hold(dev);
8412                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8413                         if (!wdev->p2p_started) {
8414                                 if (rtnl)
8415                                         rtnl_unlock();
8416                                 return -ENETDOWN;
8417                         }
8418                 }
8419
8420                 info->user_ptr[0] = rdev;
8421         }
8422
8423         return 0;
8424 }
8425
8426 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8427                               struct genl_info *info)
8428 {
8429         if (info->user_ptr[1]) {
8430                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8431                         struct wireless_dev *wdev = info->user_ptr[1];
8432
8433                         if (wdev->netdev)
8434                                 dev_put(wdev->netdev);
8435                 } else {
8436                         dev_put(info->user_ptr[1]);
8437                 }
8438         }
8439         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8440                 rtnl_unlock();
8441 }
8442
8443 static struct genl_ops nl80211_ops[] = {
8444         {
8445                 .cmd = NL80211_CMD_GET_WIPHY,
8446                 .doit = nl80211_get_wiphy,
8447                 .dumpit = nl80211_dump_wiphy,
8448                 .done = nl80211_dump_wiphy_done,
8449                 .policy = nl80211_policy,
8450                 /* can be retrieved by unprivileged users */
8451                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8452                                   NL80211_FLAG_NEED_RTNL,
8453         },
8454         {
8455                 .cmd = NL80211_CMD_SET_WIPHY,
8456                 .doit = nl80211_set_wiphy,
8457                 .policy = nl80211_policy,
8458                 .flags = GENL_ADMIN_PERM,
8459                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8460         },
8461         {
8462                 .cmd = NL80211_CMD_GET_INTERFACE,
8463                 .doit = nl80211_get_interface,
8464                 .dumpit = nl80211_dump_interface,
8465                 .policy = nl80211_policy,
8466                 /* can be retrieved by unprivileged users */
8467                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8468                                   NL80211_FLAG_NEED_RTNL,
8469         },
8470         {
8471                 .cmd = NL80211_CMD_SET_INTERFACE,
8472                 .doit = nl80211_set_interface,
8473                 .policy = nl80211_policy,
8474                 .flags = GENL_ADMIN_PERM,
8475                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8476                                   NL80211_FLAG_NEED_RTNL,
8477         },
8478         {
8479                 .cmd = NL80211_CMD_NEW_INTERFACE,
8480                 .doit = nl80211_new_interface,
8481                 .policy = nl80211_policy,
8482                 .flags = GENL_ADMIN_PERM,
8483                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8484                                   NL80211_FLAG_NEED_RTNL,
8485         },
8486         {
8487                 .cmd = NL80211_CMD_DEL_INTERFACE,
8488                 .doit = nl80211_del_interface,
8489                 .policy = nl80211_policy,
8490                 .flags = GENL_ADMIN_PERM,
8491                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8492                                   NL80211_FLAG_NEED_RTNL,
8493         },
8494         {
8495                 .cmd = NL80211_CMD_GET_KEY,
8496                 .doit = nl80211_get_key,
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_KEY,
8504                 .doit = nl80211_set_key,
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_KEY,
8512                 .doit = nl80211_new_key,
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_KEY,
8520                 .doit = nl80211_del_key,
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_BEACON,
8528                 .policy = nl80211_policy,
8529                 .flags = GENL_ADMIN_PERM,
8530                 .doit = nl80211_set_beacon,
8531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8532                                   NL80211_FLAG_NEED_RTNL,
8533         },
8534         {
8535                 .cmd = NL80211_CMD_START_AP,
8536                 .policy = nl80211_policy,
8537                 .flags = GENL_ADMIN_PERM,
8538                 .doit = nl80211_start_ap,
8539                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8540                                   NL80211_FLAG_NEED_RTNL,
8541         },
8542         {
8543                 .cmd = NL80211_CMD_STOP_AP,
8544                 .policy = nl80211_policy,
8545                 .flags = GENL_ADMIN_PERM,
8546                 .doit = nl80211_stop_ap,
8547                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8548                                   NL80211_FLAG_NEED_RTNL,
8549         },
8550         {
8551                 .cmd = NL80211_CMD_GET_STATION,
8552                 .doit = nl80211_get_station,
8553                 .dumpit = nl80211_dump_station,
8554                 .policy = nl80211_policy,
8555                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8556                                   NL80211_FLAG_NEED_RTNL,
8557         },
8558         {
8559                 .cmd = NL80211_CMD_SET_STATION,
8560                 .doit = nl80211_set_station,
8561                 .policy = nl80211_policy,
8562                 .flags = GENL_ADMIN_PERM,
8563                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8564                                   NL80211_FLAG_NEED_RTNL,
8565         },
8566         {
8567                 .cmd = NL80211_CMD_NEW_STATION,
8568                 .doit = nl80211_new_station,
8569                 .policy = nl80211_policy,
8570                 .flags = GENL_ADMIN_PERM,
8571                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8572                                   NL80211_FLAG_NEED_RTNL,
8573         },
8574         {
8575                 .cmd = NL80211_CMD_DEL_STATION,
8576                 .doit = nl80211_del_station,
8577                 .policy = nl80211_policy,
8578                 .flags = GENL_ADMIN_PERM,
8579                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8580                                   NL80211_FLAG_NEED_RTNL,
8581         },
8582         {
8583                 .cmd = NL80211_CMD_GET_MPATH,
8584                 .doit = nl80211_get_mpath,
8585                 .dumpit = nl80211_dump_mpath,
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_SET_MPATH,
8593                 .doit = nl80211_set_mpath,
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_NEW_MPATH,
8601                 .doit = nl80211_new_mpath,
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_DEL_MPATH,
8609                 .doit = nl80211_del_mpath,
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_SET_BSS,
8617                 .doit = nl80211_set_bss,
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_GET_REG,
8625                 .doit = nl80211_get_reg,
8626                 .policy = nl80211_policy,
8627                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8628                 /* can be retrieved by unprivileged users */
8629         },
8630         {
8631                 .cmd = NL80211_CMD_SET_REG,
8632                 .doit = nl80211_set_reg,
8633                 .policy = nl80211_policy,
8634                 .flags = GENL_ADMIN_PERM,
8635                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8636         },
8637         {
8638                 .cmd = NL80211_CMD_REQ_SET_REG,
8639                 .doit = nl80211_req_set_reg,
8640                 .policy = nl80211_policy,
8641                 .flags = GENL_ADMIN_PERM,
8642         },
8643         {
8644                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8645                 .doit = nl80211_get_mesh_config,
8646                 .policy = nl80211_policy,
8647                 /* can be retrieved by unprivileged users */
8648                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8649                                   NL80211_FLAG_NEED_RTNL,
8650         },
8651         {
8652                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8653                 .doit = nl80211_update_mesh_config,
8654                 .policy = nl80211_policy,
8655                 .flags = GENL_ADMIN_PERM,
8656                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8657                                   NL80211_FLAG_NEED_RTNL,
8658         },
8659         {
8660                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8661                 .doit = nl80211_trigger_scan,
8662                 .policy = nl80211_policy,
8663                 .flags = GENL_ADMIN_PERM,
8664                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8665                                   NL80211_FLAG_NEED_RTNL,
8666         },
8667         {
8668                 .cmd = NL80211_CMD_GET_SCAN,
8669                 .policy = nl80211_policy,
8670                 .dumpit = nl80211_dump_scan,
8671         },
8672         {
8673                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8674                 .doit = nl80211_start_sched_scan,
8675                 .policy = nl80211_policy,
8676                 .flags = GENL_ADMIN_PERM,
8677                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8678                                   NL80211_FLAG_NEED_RTNL,
8679         },
8680         {
8681                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8682                 .doit = nl80211_stop_sched_scan,
8683                 .policy = nl80211_policy,
8684                 .flags = GENL_ADMIN_PERM,
8685                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8686                                   NL80211_FLAG_NEED_RTNL,
8687         },
8688         {
8689                 .cmd = NL80211_CMD_AUTHENTICATE,
8690                 .doit = nl80211_authenticate,
8691                 .policy = nl80211_policy,
8692                 .flags = GENL_ADMIN_PERM,
8693                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8694                                   NL80211_FLAG_NEED_RTNL,
8695         },
8696         {
8697                 .cmd = NL80211_CMD_ASSOCIATE,
8698                 .doit = nl80211_associate,
8699                 .policy = nl80211_policy,
8700                 .flags = GENL_ADMIN_PERM,
8701                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8702                                   NL80211_FLAG_NEED_RTNL,
8703         },
8704         {
8705                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8706                 .doit = nl80211_deauthenticate,
8707                 .policy = nl80211_policy,
8708                 .flags = GENL_ADMIN_PERM,
8709                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8710                                   NL80211_FLAG_NEED_RTNL,
8711         },
8712         {
8713                 .cmd = NL80211_CMD_DISASSOCIATE,
8714                 .doit = nl80211_disassociate,
8715                 .policy = nl80211_policy,
8716                 .flags = GENL_ADMIN_PERM,
8717                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8718                                   NL80211_FLAG_NEED_RTNL,
8719         },
8720         {
8721                 .cmd = NL80211_CMD_JOIN_IBSS,
8722                 .doit = nl80211_join_ibss,
8723                 .policy = nl80211_policy,
8724                 .flags = GENL_ADMIN_PERM,
8725                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8726                                   NL80211_FLAG_NEED_RTNL,
8727         },
8728         {
8729                 .cmd = NL80211_CMD_LEAVE_IBSS,
8730                 .doit = nl80211_leave_ibss,
8731                 .policy = nl80211_policy,
8732                 .flags = GENL_ADMIN_PERM,
8733                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8734                                   NL80211_FLAG_NEED_RTNL,
8735         },
8736 #ifdef CONFIG_NL80211_TESTMODE
8737         {
8738                 .cmd = NL80211_CMD_TESTMODE,
8739                 .doit = nl80211_testmode_do,
8740                 .dumpit = nl80211_testmode_dump,
8741                 .policy = nl80211_policy,
8742                 .flags = GENL_ADMIN_PERM,
8743                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8744                                   NL80211_FLAG_NEED_RTNL,
8745         },
8746 #endif
8747         {
8748                 .cmd = NL80211_CMD_CONNECT,
8749                 .doit = nl80211_connect,
8750                 .policy = nl80211_policy,
8751                 .flags = GENL_ADMIN_PERM,
8752                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8753                                   NL80211_FLAG_NEED_RTNL,
8754         },
8755         {
8756                 .cmd = NL80211_CMD_DISCONNECT,
8757                 .doit = nl80211_disconnect,
8758                 .policy = nl80211_policy,
8759                 .flags = GENL_ADMIN_PERM,
8760                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8761                                   NL80211_FLAG_NEED_RTNL,
8762         },
8763         {
8764                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8765                 .doit = nl80211_wiphy_netns,
8766                 .policy = nl80211_policy,
8767                 .flags = GENL_ADMIN_PERM,
8768                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8769                                   NL80211_FLAG_NEED_RTNL,
8770         },
8771         {
8772                 .cmd = NL80211_CMD_GET_SURVEY,
8773                 .policy = nl80211_policy,
8774                 .dumpit = nl80211_dump_survey,
8775         },
8776         {
8777                 .cmd = NL80211_CMD_SET_PMKSA,
8778                 .doit = nl80211_setdel_pmksa,
8779                 .policy = nl80211_policy,
8780                 .flags = GENL_ADMIN_PERM,
8781                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8782                                   NL80211_FLAG_NEED_RTNL,
8783         },
8784         {
8785                 .cmd = NL80211_CMD_DEL_PMKSA,
8786                 .doit = nl80211_setdel_pmksa,
8787                 .policy = nl80211_policy,
8788                 .flags = GENL_ADMIN_PERM,
8789                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8790                                   NL80211_FLAG_NEED_RTNL,
8791         },
8792         {
8793                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8794                 .doit = nl80211_flush_pmksa,
8795                 .policy = nl80211_policy,
8796                 .flags = GENL_ADMIN_PERM,
8797                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8798                                   NL80211_FLAG_NEED_RTNL,
8799         },
8800         {
8801                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8802                 .doit = nl80211_remain_on_channel,
8803                 .policy = nl80211_policy,
8804                 .flags = GENL_ADMIN_PERM,
8805                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8806                                   NL80211_FLAG_NEED_RTNL,
8807         },
8808         {
8809                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8810                 .doit = nl80211_cancel_remain_on_channel,
8811                 .policy = nl80211_policy,
8812                 .flags = GENL_ADMIN_PERM,
8813                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8814                                   NL80211_FLAG_NEED_RTNL,
8815         },
8816         {
8817                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8818                 .doit = nl80211_set_tx_bitrate_mask,
8819                 .policy = nl80211_policy,
8820                 .flags = GENL_ADMIN_PERM,
8821                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8822                                   NL80211_FLAG_NEED_RTNL,
8823         },
8824         {
8825                 .cmd = NL80211_CMD_REGISTER_FRAME,
8826                 .doit = nl80211_register_mgmt,
8827                 .policy = nl80211_policy,
8828                 .flags = GENL_ADMIN_PERM,
8829                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8830                                   NL80211_FLAG_NEED_RTNL,
8831         },
8832         {
8833                 .cmd = NL80211_CMD_FRAME,
8834                 .doit = nl80211_tx_mgmt,
8835                 .policy = nl80211_policy,
8836                 .flags = GENL_ADMIN_PERM,
8837                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8838                                   NL80211_FLAG_NEED_RTNL,
8839         },
8840         {
8841                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8842                 .doit = nl80211_tx_mgmt_cancel_wait,
8843                 .policy = nl80211_policy,
8844                 .flags = GENL_ADMIN_PERM,
8845                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8846                                   NL80211_FLAG_NEED_RTNL,
8847         },
8848         {
8849                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8850                 .doit = nl80211_set_power_save,
8851                 .policy = nl80211_policy,
8852                 .flags = GENL_ADMIN_PERM,
8853                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8854                                   NL80211_FLAG_NEED_RTNL,
8855         },
8856         {
8857                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8858                 .doit = nl80211_get_power_save,
8859                 .policy = nl80211_policy,
8860                 /* can be retrieved by unprivileged users */
8861                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8862                                   NL80211_FLAG_NEED_RTNL,
8863         },
8864         {
8865                 .cmd = NL80211_CMD_SET_CQM,
8866                 .doit = nl80211_set_cqm,
8867                 .policy = nl80211_policy,
8868                 .flags = GENL_ADMIN_PERM,
8869                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8870                                   NL80211_FLAG_NEED_RTNL,
8871         },
8872         {
8873                 .cmd = NL80211_CMD_SET_CHANNEL,
8874                 .doit = nl80211_set_channel,
8875                 .policy = nl80211_policy,
8876                 .flags = GENL_ADMIN_PERM,
8877                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8878                                   NL80211_FLAG_NEED_RTNL,
8879         },
8880         {
8881                 .cmd = NL80211_CMD_SET_WDS_PEER,
8882                 .doit = nl80211_set_wds_peer,
8883                 .policy = nl80211_policy,
8884                 .flags = GENL_ADMIN_PERM,
8885                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8886                                   NL80211_FLAG_NEED_RTNL,
8887         },
8888         {
8889                 .cmd = NL80211_CMD_JOIN_MESH,
8890                 .doit = nl80211_join_mesh,
8891                 .policy = nl80211_policy,
8892                 .flags = GENL_ADMIN_PERM,
8893                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8894                                   NL80211_FLAG_NEED_RTNL,
8895         },
8896         {
8897                 .cmd = NL80211_CMD_LEAVE_MESH,
8898                 .doit = nl80211_leave_mesh,
8899                 .policy = nl80211_policy,
8900                 .flags = GENL_ADMIN_PERM,
8901                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8902                                   NL80211_FLAG_NEED_RTNL,
8903         },
8904 #ifdef CONFIG_PM
8905         {
8906                 .cmd = NL80211_CMD_GET_WOWLAN,
8907                 .doit = nl80211_get_wowlan,
8908                 .policy = nl80211_policy,
8909                 /* can be retrieved by unprivileged users */
8910                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8911                                   NL80211_FLAG_NEED_RTNL,
8912         },
8913         {
8914                 .cmd = NL80211_CMD_SET_WOWLAN,
8915                 .doit = nl80211_set_wowlan,
8916                 .policy = nl80211_policy,
8917                 .flags = GENL_ADMIN_PERM,
8918                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8919                                   NL80211_FLAG_NEED_RTNL,
8920         },
8921 #endif
8922         {
8923                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8924                 .doit = nl80211_set_rekey_data,
8925                 .policy = nl80211_policy,
8926                 .flags = GENL_ADMIN_PERM,
8927                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8928                                   NL80211_FLAG_NEED_RTNL,
8929         },
8930         {
8931                 .cmd = NL80211_CMD_TDLS_MGMT,
8932                 .doit = nl80211_tdls_mgmt,
8933                 .policy = nl80211_policy,
8934                 .flags = GENL_ADMIN_PERM,
8935                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8936                                   NL80211_FLAG_NEED_RTNL,
8937         },
8938         {
8939                 .cmd = NL80211_CMD_TDLS_OPER,
8940                 .doit = nl80211_tdls_oper,
8941                 .policy = nl80211_policy,
8942                 .flags = GENL_ADMIN_PERM,
8943                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8944                                   NL80211_FLAG_NEED_RTNL,
8945         },
8946         {
8947                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8948                 .doit = nl80211_register_unexpected_frame,
8949                 .policy = nl80211_policy,
8950                 .flags = GENL_ADMIN_PERM,
8951                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8952                                   NL80211_FLAG_NEED_RTNL,
8953         },
8954         {
8955                 .cmd = NL80211_CMD_PROBE_CLIENT,
8956                 .doit = nl80211_probe_client,
8957                 .policy = nl80211_policy,
8958                 .flags = GENL_ADMIN_PERM,
8959                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8960                                   NL80211_FLAG_NEED_RTNL,
8961         },
8962         {
8963                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8964                 .doit = nl80211_register_beacons,
8965                 .policy = nl80211_policy,
8966                 .flags = GENL_ADMIN_PERM,
8967                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8968                                   NL80211_FLAG_NEED_RTNL,
8969         },
8970         {
8971                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8972                 .doit = nl80211_set_noack_map,
8973                 .policy = nl80211_policy,
8974                 .flags = GENL_ADMIN_PERM,
8975                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8976                                   NL80211_FLAG_NEED_RTNL,
8977         },
8978         {
8979                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8980                 .doit = nl80211_start_p2p_device,
8981                 .policy = nl80211_policy,
8982                 .flags = GENL_ADMIN_PERM,
8983                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8984                                   NL80211_FLAG_NEED_RTNL,
8985         },
8986         {
8987                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8988                 .doit = nl80211_stop_p2p_device,
8989                 .policy = nl80211_policy,
8990                 .flags = GENL_ADMIN_PERM,
8991                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8992                                   NL80211_FLAG_NEED_RTNL,
8993         },
8994         {
8995                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8996                 .doit = nl80211_set_mcast_rate,
8997                 .policy = nl80211_policy,
8998                 .flags = GENL_ADMIN_PERM,
8999                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9000                                   NL80211_FLAG_NEED_RTNL,
9001         },
9002         {
9003                 .cmd = NL80211_CMD_SET_MAC_ACL,
9004                 .doit = nl80211_set_mac_acl,
9005                 .policy = nl80211_policy,
9006                 .flags = GENL_ADMIN_PERM,
9007                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9008                                   NL80211_FLAG_NEED_RTNL,
9009         },
9010         {
9011                 .cmd = NL80211_CMD_RADAR_DETECT,
9012                 .doit = nl80211_start_radar_detection,
9013                 .policy = nl80211_policy,
9014                 .flags = GENL_ADMIN_PERM,
9015                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9016                                   NL80211_FLAG_NEED_RTNL,
9017         },
9018         {
9019                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9020                 .doit = nl80211_get_protocol_features,
9021                 .policy = nl80211_policy,
9022         },
9023         {
9024                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9025                 .doit = nl80211_update_ft_ies,
9026                 .policy = nl80211_policy,
9027                 .flags = GENL_ADMIN_PERM,
9028                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9029                                   NL80211_FLAG_NEED_RTNL,
9030         },
9031         {
9032                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9033                 .doit = nl80211_crit_protocol_start,
9034                 .policy = nl80211_policy,
9035                 .flags = GENL_ADMIN_PERM,
9036                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9037                                   NL80211_FLAG_NEED_RTNL,
9038         },
9039         {
9040                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9041                 .doit = nl80211_crit_protocol_stop,
9042                 .policy = nl80211_policy,
9043                 .flags = GENL_ADMIN_PERM,
9044                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9045                                   NL80211_FLAG_NEED_RTNL,
9046         }
9047 };
9048
9049 static struct genl_multicast_group nl80211_mlme_mcgrp = {
9050         .name = "mlme",
9051 };
9052
9053 /* multicast groups */
9054 static struct genl_multicast_group nl80211_config_mcgrp = {
9055         .name = "config",
9056 };
9057 static struct genl_multicast_group nl80211_scan_mcgrp = {
9058         .name = "scan",
9059 };
9060 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9061         .name = "regulatory",
9062 };
9063
9064 /* notification functions */
9065
9066 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9067 {
9068         struct sk_buff *msg;
9069         struct nl80211_dump_wiphy_state state = {};
9070
9071         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9072         if (!msg)
9073                 return;
9074
9075         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9076                 nlmsg_free(msg);
9077                 return;
9078         }
9079
9080         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9081                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9082 }
9083
9084 static int nl80211_add_scan_req(struct sk_buff *msg,
9085                                 struct cfg80211_registered_device *rdev)
9086 {
9087         struct cfg80211_scan_request *req = rdev->scan_req;
9088         struct nlattr *nest;
9089         int i;
9090
9091         if (WARN_ON(!req))
9092                 return 0;
9093
9094         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9095         if (!nest)
9096                 goto nla_put_failure;
9097         for (i = 0; i < req->n_ssids; i++) {
9098                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9099                         goto nla_put_failure;
9100         }
9101         nla_nest_end(msg, nest);
9102
9103         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9104         if (!nest)
9105                 goto nla_put_failure;
9106         for (i = 0; i < req->n_channels; i++) {
9107                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9108                         goto nla_put_failure;
9109         }
9110         nla_nest_end(msg, nest);
9111
9112         if (req->ie &&
9113             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9114                 goto nla_put_failure;
9115
9116         if (req->flags)
9117                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9118
9119         return 0;
9120  nla_put_failure:
9121         return -ENOBUFS;
9122 }
9123
9124 static int nl80211_send_scan_msg(struct sk_buff *msg,
9125                                  struct cfg80211_registered_device *rdev,
9126                                  struct wireless_dev *wdev,
9127                                  u32 portid, u32 seq, int flags,
9128                                  u32 cmd)
9129 {
9130         void *hdr;
9131
9132         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9133         if (!hdr)
9134                 return -1;
9135
9136         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9137             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9138                                          wdev->netdev->ifindex)) ||
9139             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9140                 goto nla_put_failure;
9141
9142         /* ignore errors and send incomplete event anyway */
9143         nl80211_add_scan_req(msg, rdev);
9144
9145         return genlmsg_end(msg, hdr);
9146
9147  nla_put_failure:
9148         genlmsg_cancel(msg, hdr);
9149         return -EMSGSIZE;
9150 }
9151
9152 static int
9153 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9154                             struct cfg80211_registered_device *rdev,
9155                             struct net_device *netdev,
9156                             u32 portid, u32 seq, int flags, u32 cmd)
9157 {
9158         void *hdr;
9159
9160         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9161         if (!hdr)
9162                 return -1;
9163
9164         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9165             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9166                 goto nla_put_failure;
9167
9168         return genlmsg_end(msg, hdr);
9169
9170  nla_put_failure:
9171         genlmsg_cancel(msg, hdr);
9172         return -EMSGSIZE;
9173 }
9174
9175 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9176                              struct wireless_dev *wdev)
9177 {
9178         struct sk_buff *msg;
9179
9180         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9181         if (!msg)
9182                 return;
9183
9184         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9185                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9186                 nlmsg_free(msg);
9187                 return;
9188         }
9189
9190         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9191                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9192 }
9193
9194 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9195                             struct wireless_dev *wdev)
9196 {
9197         struct sk_buff *msg;
9198
9199         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9200         if (!msg)
9201                 return;
9202
9203         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9204                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9205                 nlmsg_free(msg);
9206                 return;
9207         }
9208
9209         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9210                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9211 }
9212
9213 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9214                                struct wireless_dev *wdev)
9215 {
9216         struct sk_buff *msg;
9217
9218         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9219         if (!msg)
9220                 return;
9221
9222         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9223                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9224                 nlmsg_free(msg);
9225                 return;
9226         }
9227
9228         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9229                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9230 }
9231
9232 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9233                                      struct net_device *netdev)
9234 {
9235         struct sk_buff *msg;
9236
9237         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9238         if (!msg)
9239                 return;
9240
9241         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9242                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9243                 nlmsg_free(msg);
9244                 return;
9245         }
9246
9247         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9248                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9249 }
9250
9251 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9252                              struct net_device *netdev, u32 cmd)
9253 {
9254         struct sk_buff *msg;
9255
9256         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9257         if (!msg)
9258                 return;
9259
9260         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9261                 nlmsg_free(msg);
9262                 return;
9263         }
9264
9265         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9266                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9267 }
9268
9269 /*
9270  * This can happen on global regulatory changes or device specific settings
9271  * based on custom world regulatory domains.
9272  */
9273 void nl80211_send_reg_change_event(struct regulatory_request *request)
9274 {
9275         struct sk_buff *msg;
9276         void *hdr;
9277
9278         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9279         if (!msg)
9280                 return;
9281
9282         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9283         if (!hdr) {
9284                 nlmsg_free(msg);
9285                 return;
9286         }
9287
9288         /* Userspace can always count this one always being set */
9289         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9290                 goto nla_put_failure;
9291
9292         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9293                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9294                                NL80211_REGDOM_TYPE_WORLD))
9295                         goto nla_put_failure;
9296         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9297                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9298                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9299                         goto nla_put_failure;
9300         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9301                    request->intersect) {
9302                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9303                                NL80211_REGDOM_TYPE_INTERSECTION))
9304                         goto nla_put_failure;
9305         } else {
9306                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9307                                NL80211_REGDOM_TYPE_COUNTRY) ||
9308                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9309                                    request->alpha2))
9310                         goto nla_put_failure;
9311         }
9312
9313         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9314             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9315                 goto nla_put_failure;
9316
9317         genlmsg_end(msg, hdr);
9318
9319         rcu_read_lock();
9320         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9321                                 GFP_ATOMIC);
9322         rcu_read_unlock();
9323
9324         return;
9325
9326 nla_put_failure:
9327         genlmsg_cancel(msg, hdr);
9328         nlmsg_free(msg);
9329 }
9330
9331 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9332                                     struct net_device *netdev,
9333                                     const u8 *buf, size_t len,
9334                                     enum nl80211_commands cmd, gfp_t gfp)
9335 {
9336         struct sk_buff *msg;
9337         void *hdr;
9338
9339         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9340         if (!msg)
9341                 return;
9342
9343         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9344         if (!hdr) {
9345                 nlmsg_free(msg);
9346                 return;
9347         }
9348
9349         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9350             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9351             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9352                 goto nla_put_failure;
9353
9354         genlmsg_end(msg, hdr);
9355
9356         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9357                                 nl80211_mlme_mcgrp.id, gfp);
9358         return;
9359
9360  nla_put_failure:
9361         genlmsg_cancel(msg, hdr);
9362         nlmsg_free(msg);
9363 }
9364
9365 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9366                           struct net_device *netdev, const u8 *buf,
9367                           size_t len, gfp_t gfp)
9368 {
9369         nl80211_send_mlme_event(rdev, netdev, buf, len,
9370                                 NL80211_CMD_AUTHENTICATE, gfp);
9371 }
9372
9373 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9374                            struct net_device *netdev, const u8 *buf,
9375                            size_t len, gfp_t gfp)
9376 {
9377         nl80211_send_mlme_event(rdev, netdev, buf, len,
9378                                 NL80211_CMD_ASSOCIATE, gfp);
9379 }
9380
9381 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9382                          struct net_device *netdev, const u8 *buf,
9383                          size_t len, gfp_t gfp)
9384 {
9385         nl80211_send_mlme_event(rdev, netdev, buf, len,
9386                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9387 }
9388
9389 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9390                            struct net_device *netdev, const u8 *buf,
9391                            size_t len, gfp_t gfp)
9392 {
9393         nl80211_send_mlme_event(rdev, netdev, buf, len,
9394                                 NL80211_CMD_DISASSOCIATE, gfp);
9395 }
9396
9397 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
9398                                   size_t len)
9399 {
9400         struct wireless_dev *wdev = dev->ieee80211_ptr;
9401         struct wiphy *wiphy = wdev->wiphy;
9402         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9403         const struct ieee80211_mgmt *mgmt = (void *)buf;
9404         u32 cmd;
9405
9406         if (WARN_ON(len < 2))
9407                 return;
9408
9409         if (ieee80211_is_deauth(mgmt->frame_control))
9410                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
9411         else
9412                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
9413
9414         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
9415         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
9416 }
9417 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
9418
9419 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9420                                       struct net_device *netdev, int cmd,
9421                                       const u8 *addr, gfp_t gfp)
9422 {
9423         struct sk_buff *msg;
9424         void *hdr;
9425
9426         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9427         if (!msg)
9428                 return;
9429
9430         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9431         if (!hdr) {
9432                 nlmsg_free(msg);
9433                 return;
9434         }
9435
9436         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9437             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9438             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9439             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9440                 goto nla_put_failure;
9441
9442         genlmsg_end(msg, hdr);
9443
9444         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9445                                 nl80211_mlme_mcgrp.id, gfp);
9446         return;
9447
9448  nla_put_failure:
9449         genlmsg_cancel(msg, hdr);
9450         nlmsg_free(msg);
9451 }
9452
9453 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9454                                struct net_device *netdev, const u8 *addr,
9455                                gfp_t gfp)
9456 {
9457         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9458                                   addr, gfp);
9459 }
9460
9461 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9462                                 struct net_device *netdev, const u8 *addr,
9463                                 gfp_t gfp)
9464 {
9465         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9466                                   addr, gfp);
9467 }
9468
9469 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9470                                  struct net_device *netdev, const u8 *bssid,
9471                                  const u8 *req_ie, size_t req_ie_len,
9472                                  const u8 *resp_ie, size_t resp_ie_len,
9473                                  u16 status, gfp_t gfp)
9474 {
9475         struct sk_buff *msg;
9476         void *hdr;
9477
9478         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9479         if (!msg)
9480                 return;
9481
9482         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9483         if (!hdr) {
9484                 nlmsg_free(msg);
9485                 return;
9486         }
9487
9488         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9489             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9490             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9491             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9492             (req_ie &&
9493              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9494             (resp_ie &&
9495              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9496                 goto nla_put_failure;
9497
9498         genlmsg_end(msg, hdr);
9499
9500         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9501                                 nl80211_mlme_mcgrp.id, gfp);
9502         return;
9503
9504  nla_put_failure:
9505         genlmsg_cancel(msg, hdr);
9506         nlmsg_free(msg);
9507
9508 }
9509
9510 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9511                          struct net_device *netdev, const u8 *bssid,
9512                          const u8 *req_ie, size_t req_ie_len,
9513                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9514 {
9515         struct sk_buff *msg;
9516         void *hdr;
9517
9518         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9519         if (!msg)
9520                 return;
9521
9522         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9523         if (!hdr) {
9524                 nlmsg_free(msg);
9525                 return;
9526         }
9527
9528         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9529             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9530             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9531             (req_ie &&
9532              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9533             (resp_ie &&
9534              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9535                 goto nla_put_failure;
9536
9537         genlmsg_end(msg, hdr);
9538
9539         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9540                                 nl80211_mlme_mcgrp.id, gfp);
9541         return;
9542
9543  nla_put_failure:
9544         genlmsg_cancel(msg, hdr);
9545         nlmsg_free(msg);
9546
9547 }
9548
9549 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9550                                struct net_device *netdev, u16 reason,
9551                                const u8 *ie, size_t ie_len, bool from_ap)
9552 {
9553         struct sk_buff *msg;
9554         void *hdr;
9555
9556         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9557         if (!msg)
9558                 return;
9559
9560         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9561         if (!hdr) {
9562                 nlmsg_free(msg);
9563                 return;
9564         }
9565
9566         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9567             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9568             (from_ap && reason &&
9569              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9570             (from_ap &&
9571              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9572             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9573                 goto nla_put_failure;
9574
9575         genlmsg_end(msg, hdr);
9576
9577         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9578                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9579         return;
9580
9581  nla_put_failure:
9582         genlmsg_cancel(msg, hdr);
9583         nlmsg_free(msg);
9584
9585 }
9586
9587 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9588                              struct net_device *netdev, const u8 *bssid,
9589                              gfp_t gfp)
9590 {
9591         struct sk_buff *msg;
9592         void *hdr;
9593
9594         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9595         if (!msg)
9596                 return;
9597
9598         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9599         if (!hdr) {
9600                 nlmsg_free(msg);
9601                 return;
9602         }
9603
9604         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9605             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9606             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9607                 goto nla_put_failure;
9608
9609         genlmsg_end(msg, hdr);
9610
9611         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9612                                 nl80211_mlme_mcgrp.id, gfp);
9613         return;
9614
9615  nla_put_failure:
9616         genlmsg_cancel(msg, hdr);
9617         nlmsg_free(msg);
9618 }
9619
9620 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9621                                         const u8* ie, u8 ie_len, gfp_t gfp)
9622 {
9623         struct wireless_dev *wdev = dev->ieee80211_ptr;
9624         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9625         struct sk_buff *msg;
9626         void *hdr;
9627
9628         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9629                 return;
9630
9631         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9632
9633         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9634         if (!msg)
9635                 return;
9636
9637         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9638         if (!hdr) {
9639                 nlmsg_free(msg);
9640                 return;
9641         }
9642
9643         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9644             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9645             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9646             (ie_len && ie &&
9647              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9648                 goto nla_put_failure;
9649
9650         genlmsg_end(msg, hdr);
9651
9652         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9653                                 nl80211_mlme_mcgrp.id, gfp);
9654         return;
9655
9656  nla_put_failure:
9657         genlmsg_cancel(msg, hdr);
9658         nlmsg_free(msg);
9659 }
9660 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9661
9662 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9663                                  struct net_device *netdev, const u8 *addr,
9664                                  enum nl80211_key_type key_type, int key_id,
9665                                  const u8 *tsc, gfp_t gfp)
9666 {
9667         struct sk_buff *msg;
9668         void *hdr;
9669
9670         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9671         if (!msg)
9672                 return;
9673
9674         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9675         if (!hdr) {
9676                 nlmsg_free(msg);
9677                 return;
9678         }
9679
9680         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9681             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9682             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9683             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9684             (key_id != -1 &&
9685              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9686             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9687                 goto nla_put_failure;
9688
9689         genlmsg_end(msg, hdr);
9690
9691         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9692                                 nl80211_mlme_mcgrp.id, gfp);
9693         return;
9694
9695  nla_put_failure:
9696         genlmsg_cancel(msg, hdr);
9697         nlmsg_free(msg);
9698 }
9699
9700 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9701                                     struct ieee80211_channel *channel_before,
9702                                     struct ieee80211_channel *channel_after)
9703 {
9704         struct sk_buff *msg;
9705         void *hdr;
9706         struct nlattr *nl_freq;
9707
9708         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9709         if (!msg)
9710                 return;
9711
9712         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9713         if (!hdr) {
9714                 nlmsg_free(msg);
9715                 return;
9716         }
9717
9718         /*
9719          * Since we are applying the beacon hint to a wiphy we know its
9720          * wiphy_idx is valid
9721          */
9722         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9723                 goto nla_put_failure;
9724
9725         /* Before */
9726         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9727         if (!nl_freq)
9728                 goto nla_put_failure;
9729         if (nl80211_msg_put_channel(msg, channel_before, false))
9730                 goto nla_put_failure;
9731         nla_nest_end(msg, nl_freq);
9732
9733         /* After */
9734         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9735         if (!nl_freq)
9736                 goto nla_put_failure;
9737         if (nl80211_msg_put_channel(msg, channel_after, false))
9738                 goto nla_put_failure;
9739         nla_nest_end(msg, nl_freq);
9740
9741         genlmsg_end(msg, hdr);
9742
9743         rcu_read_lock();
9744         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9745                                 GFP_ATOMIC);
9746         rcu_read_unlock();
9747
9748         return;
9749
9750 nla_put_failure:
9751         genlmsg_cancel(msg, hdr);
9752         nlmsg_free(msg);
9753 }
9754
9755 static void nl80211_send_remain_on_chan_event(
9756         int cmd, struct cfg80211_registered_device *rdev,
9757         struct wireless_dev *wdev, u64 cookie,
9758         struct ieee80211_channel *chan,
9759         unsigned int duration, gfp_t gfp)
9760 {
9761         struct sk_buff *msg;
9762         void *hdr;
9763
9764         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9765         if (!msg)
9766                 return;
9767
9768         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9769         if (!hdr) {
9770                 nlmsg_free(msg);
9771                 return;
9772         }
9773
9774         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9775             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9776                                          wdev->netdev->ifindex)) ||
9777             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9778             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9779             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9780                         NL80211_CHAN_NO_HT) ||
9781             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9782                 goto nla_put_failure;
9783
9784         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9785             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
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
9799 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9800                                struct ieee80211_channel *chan,
9801                                unsigned int duration, gfp_t gfp)
9802 {
9803         struct wiphy *wiphy = wdev->wiphy;
9804         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9805
9806         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9807         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9808                                           rdev, wdev, cookie, chan,
9809                                           duration, gfp);
9810 }
9811 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9812
9813 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9814                                         struct ieee80211_channel *chan,
9815                                         gfp_t gfp)
9816 {
9817         struct wiphy *wiphy = wdev->wiphy;
9818         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9819
9820         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9821         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9822                                           rdev, wdev, cookie, chan, 0, gfp);
9823 }
9824 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9825
9826 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9827                       struct station_info *sinfo, gfp_t gfp)
9828 {
9829         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9830         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9831         struct sk_buff *msg;
9832
9833         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9834
9835         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9836         if (!msg)
9837                 return;
9838
9839         if (nl80211_send_station(msg, 0, 0, 0,
9840                                  rdev, dev, mac_addr, sinfo) < 0) {
9841                 nlmsg_free(msg);
9842                 return;
9843         }
9844
9845         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9846                                 nl80211_mlme_mcgrp.id, gfp);
9847 }
9848 EXPORT_SYMBOL(cfg80211_new_sta);
9849
9850 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9851 {
9852         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9853         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9854         struct sk_buff *msg;
9855         void *hdr;
9856
9857         trace_cfg80211_del_sta(dev, mac_addr);
9858
9859         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9860         if (!msg)
9861                 return;
9862
9863         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9864         if (!hdr) {
9865                 nlmsg_free(msg);
9866                 return;
9867         }
9868
9869         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9870             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9871                 goto nla_put_failure;
9872
9873         genlmsg_end(msg, hdr);
9874
9875         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9876                                 nl80211_mlme_mcgrp.id, gfp);
9877         return;
9878
9879  nla_put_failure:
9880         genlmsg_cancel(msg, hdr);
9881         nlmsg_free(msg);
9882 }
9883 EXPORT_SYMBOL(cfg80211_del_sta);
9884
9885 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9886                           enum nl80211_connect_failed_reason reason,
9887                           gfp_t gfp)
9888 {
9889         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9890         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9891         struct sk_buff *msg;
9892         void *hdr;
9893
9894         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9895         if (!msg)
9896                 return;
9897
9898         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9899         if (!hdr) {
9900                 nlmsg_free(msg);
9901                 return;
9902         }
9903
9904         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9905             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9906             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9907                 goto nla_put_failure;
9908
9909         genlmsg_end(msg, hdr);
9910
9911         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9912                                 nl80211_mlme_mcgrp.id, gfp);
9913         return;
9914
9915  nla_put_failure:
9916         genlmsg_cancel(msg, hdr);
9917         nlmsg_free(msg);
9918 }
9919 EXPORT_SYMBOL(cfg80211_conn_failed);
9920
9921 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9922                                        const u8 *addr, gfp_t gfp)
9923 {
9924         struct wireless_dev *wdev = dev->ieee80211_ptr;
9925         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9926         struct sk_buff *msg;
9927         void *hdr;
9928         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9929
9930         if (!nlportid)
9931                 return false;
9932
9933         msg = nlmsg_new(100, gfp);
9934         if (!msg)
9935                 return true;
9936
9937         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9938         if (!hdr) {
9939                 nlmsg_free(msg);
9940                 return true;
9941         }
9942
9943         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9944             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9945             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9946                 goto nla_put_failure;
9947
9948         genlmsg_end(msg, hdr);
9949         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9950         return true;
9951
9952  nla_put_failure:
9953         genlmsg_cancel(msg, hdr);
9954         nlmsg_free(msg);
9955         return true;
9956 }
9957
9958 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9959                                 const u8 *addr, gfp_t gfp)
9960 {
9961         struct wireless_dev *wdev = dev->ieee80211_ptr;
9962         bool ret;
9963
9964         trace_cfg80211_rx_spurious_frame(dev, addr);
9965
9966         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9967                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9968                 trace_cfg80211_return_bool(false);
9969                 return false;
9970         }
9971         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9972                                          addr, gfp);
9973         trace_cfg80211_return_bool(ret);
9974         return ret;
9975 }
9976 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9977
9978 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9979                                         const u8 *addr, gfp_t gfp)
9980 {
9981         struct wireless_dev *wdev = dev->ieee80211_ptr;
9982         bool ret;
9983
9984         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9985
9986         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9987                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9988                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9989                 trace_cfg80211_return_bool(false);
9990                 return false;
9991         }
9992         ret = __nl80211_unexpected_frame(dev,
9993                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9994                                          addr, gfp);
9995         trace_cfg80211_return_bool(ret);
9996         return ret;
9997 }
9998 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9999
10000 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10001                       struct wireless_dev *wdev, u32 nlportid,
10002                       int freq, int sig_dbm,
10003                       const u8 *buf, size_t len, gfp_t gfp)
10004 {
10005         struct net_device *netdev = wdev->netdev;
10006         struct sk_buff *msg;
10007         void *hdr;
10008
10009         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10010         if (!msg)
10011                 return -ENOMEM;
10012
10013         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10014         if (!hdr) {
10015                 nlmsg_free(msg);
10016                 return -ENOMEM;
10017         }
10018
10019         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10020             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10021                                         netdev->ifindex)) ||
10022             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10023             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10024             (sig_dbm &&
10025              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10026             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10027                 goto nla_put_failure;
10028
10029         genlmsg_end(msg, hdr);
10030
10031         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10032
10033  nla_put_failure:
10034         genlmsg_cancel(msg, hdr);
10035         nlmsg_free(msg);
10036         return -ENOBUFS;
10037 }
10038
10039 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10040                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10041 {
10042         struct wiphy *wiphy = wdev->wiphy;
10043         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10044         struct net_device *netdev = wdev->netdev;
10045         struct sk_buff *msg;
10046         void *hdr;
10047
10048         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10049
10050         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10051         if (!msg)
10052                 return;
10053
10054         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10055         if (!hdr) {
10056                 nlmsg_free(msg);
10057                 return;
10058         }
10059
10060         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10061             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10062                                    netdev->ifindex)) ||
10063             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10064             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10065             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10066             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10067                 goto nla_put_failure;
10068
10069         genlmsg_end(msg, hdr);
10070
10071         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10072                                 nl80211_mlme_mcgrp.id, gfp);
10073         return;
10074
10075  nla_put_failure:
10076         genlmsg_cancel(msg, hdr);
10077         nlmsg_free(msg);
10078 }
10079 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10080
10081 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10082                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10083                               gfp_t gfp)
10084 {
10085         struct wireless_dev *wdev = dev->ieee80211_ptr;
10086         struct wiphy *wiphy = wdev->wiphy;
10087         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10088         struct sk_buff *msg;
10089         struct nlattr *pinfoattr;
10090         void *hdr;
10091
10092         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10093
10094         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10095         if (!msg)
10096                 return;
10097
10098         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10099         if (!hdr) {
10100                 nlmsg_free(msg);
10101                 return;
10102         }
10103
10104         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10105             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10106                 goto nla_put_failure;
10107
10108         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10109         if (!pinfoattr)
10110                 goto nla_put_failure;
10111
10112         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10113                         rssi_event))
10114                 goto nla_put_failure;
10115
10116         nla_nest_end(msg, pinfoattr);
10117
10118         genlmsg_end(msg, hdr);
10119
10120         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10121                                 nl80211_mlme_mcgrp.id, gfp);
10122         return;
10123
10124  nla_put_failure:
10125         genlmsg_cancel(msg, hdr);
10126         nlmsg_free(msg);
10127 }
10128 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10129
10130 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10131                                      struct net_device *netdev, const u8 *bssid,
10132                                      const u8 *replay_ctr, gfp_t gfp)
10133 {
10134         struct sk_buff *msg;
10135         struct nlattr *rekey_attr;
10136         void *hdr;
10137
10138         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10139         if (!msg)
10140                 return;
10141
10142         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10143         if (!hdr) {
10144                 nlmsg_free(msg);
10145                 return;
10146         }
10147
10148         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10149             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10150             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10151                 goto nla_put_failure;
10152
10153         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10154         if (!rekey_attr)
10155                 goto nla_put_failure;
10156
10157         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10158                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10159                 goto nla_put_failure;
10160
10161         nla_nest_end(msg, rekey_attr);
10162
10163         genlmsg_end(msg, hdr);
10164
10165         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10166                                 nl80211_mlme_mcgrp.id, gfp);
10167         return;
10168
10169  nla_put_failure:
10170         genlmsg_cancel(msg, hdr);
10171         nlmsg_free(msg);
10172 }
10173
10174 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10175                                const u8 *replay_ctr, gfp_t gfp)
10176 {
10177         struct wireless_dev *wdev = dev->ieee80211_ptr;
10178         struct wiphy *wiphy = wdev->wiphy;
10179         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10180
10181         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10182         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10183 }
10184 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10185
10186 static void
10187 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10188                                struct net_device *netdev, int index,
10189                                const u8 *bssid, bool preauth, gfp_t gfp)
10190 {
10191         struct sk_buff *msg;
10192         struct nlattr *attr;
10193         void *hdr;
10194
10195         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10196         if (!msg)
10197                 return;
10198
10199         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10200         if (!hdr) {
10201                 nlmsg_free(msg);
10202                 return;
10203         }
10204
10205         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10206             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10207                 goto nla_put_failure;
10208
10209         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10210         if (!attr)
10211                 goto nla_put_failure;
10212
10213         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10214             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10215             (preauth &&
10216              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10217                 goto nla_put_failure;
10218
10219         nla_nest_end(msg, attr);
10220
10221         genlmsg_end(msg, hdr);
10222
10223         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10224                                 nl80211_mlme_mcgrp.id, gfp);
10225         return;
10226
10227  nla_put_failure:
10228         genlmsg_cancel(msg, hdr);
10229         nlmsg_free(msg);
10230 }
10231
10232 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10233                                      const u8 *bssid, bool preauth, gfp_t gfp)
10234 {
10235         struct wireless_dev *wdev = dev->ieee80211_ptr;
10236         struct wiphy *wiphy = wdev->wiphy;
10237         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10238
10239         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10240         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10241 }
10242 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10243
10244 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10245                                      struct net_device *netdev,
10246                                      struct cfg80211_chan_def *chandef,
10247                                      gfp_t gfp)
10248 {
10249         struct sk_buff *msg;
10250         void *hdr;
10251
10252         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10253         if (!msg)
10254                 return;
10255
10256         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10257         if (!hdr) {
10258                 nlmsg_free(msg);
10259                 return;
10260         }
10261
10262         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10263                 goto nla_put_failure;
10264
10265         if (nl80211_send_chandef(msg, chandef))
10266                 goto nla_put_failure;
10267
10268         genlmsg_end(msg, hdr);
10269
10270         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10271                                 nl80211_mlme_mcgrp.id, gfp);
10272         return;
10273
10274  nla_put_failure:
10275         genlmsg_cancel(msg, hdr);
10276         nlmsg_free(msg);
10277 }
10278
10279 void cfg80211_ch_switch_notify(struct net_device *dev,
10280                                struct cfg80211_chan_def *chandef)
10281 {
10282         struct wireless_dev *wdev = dev->ieee80211_ptr;
10283         struct wiphy *wiphy = wdev->wiphy;
10284         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10285
10286         trace_cfg80211_ch_switch_notify(dev, chandef);
10287
10288         wdev_lock(wdev);
10289
10290         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10291                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10292                 goto out;
10293
10294         wdev->channel = chandef->chan;
10295         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10296 out:
10297         wdev_unlock(wdev);
10298         return;
10299 }
10300 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10301
10302 void cfg80211_cqm_txe_notify(struct net_device *dev,
10303                              const u8 *peer, u32 num_packets,
10304                              u32 rate, u32 intvl, gfp_t gfp)
10305 {
10306         struct wireless_dev *wdev = dev->ieee80211_ptr;
10307         struct wiphy *wiphy = wdev->wiphy;
10308         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10309         struct sk_buff *msg;
10310         struct nlattr *pinfoattr;
10311         void *hdr;
10312
10313         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10314         if (!msg)
10315                 return;
10316
10317         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10318         if (!hdr) {
10319                 nlmsg_free(msg);
10320                 return;
10321         }
10322
10323         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10324             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10325             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10326                 goto nla_put_failure;
10327
10328         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10329         if (!pinfoattr)
10330                 goto nla_put_failure;
10331
10332         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10333                 goto nla_put_failure;
10334
10335         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10336                 goto nla_put_failure;
10337
10338         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10339                 goto nla_put_failure;
10340
10341         nla_nest_end(msg, pinfoattr);
10342
10343         genlmsg_end(msg, hdr);
10344
10345         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10346                                 nl80211_mlme_mcgrp.id, gfp);
10347         return;
10348
10349  nla_put_failure:
10350         genlmsg_cancel(msg, hdr);
10351         nlmsg_free(msg);
10352 }
10353 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10354
10355 void
10356 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10357                      struct cfg80211_chan_def *chandef,
10358                      enum nl80211_radar_event event,
10359                      struct net_device *netdev, gfp_t gfp)
10360 {
10361         struct sk_buff *msg;
10362         void *hdr;
10363
10364         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10365         if (!msg)
10366                 return;
10367
10368         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10369         if (!hdr) {
10370                 nlmsg_free(msg);
10371                 return;
10372         }
10373
10374         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10375                 goto nla_put_failure;
10376
10377         /* NOP and radar events don't need a netdev parameter */
10378         if (netdev) {
10379                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10380
10381                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10382                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10383                         goto nla_put_failure;
10384         }
10385
10386         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10387                 goto nla_put_failure;
10388
10389         if (nl80211_send_chandef(msg, chandef))
10390                 goto nla_put_failure;
10391
10392         genlmsg_end(msg, hdr);
10393
10394         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10395                                 nl80211_mlme_mcgrp.id, gfp);
10396         return;
10397
10398  nla_put_failure:
10399         genlmsg_cancel(msg, hdr);
10400         nlmsg_free(msg);
10401 }
10402
10403 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10404                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10405 {
10406         struct wireless_dev *wdev = dev->ieee80211_ptr;
10407         struct wiphy *wiphy = wdev->wiphy;
10408         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10409         struct sk_buff *msg;
10410         struct nlattr *pinfoattr;
10411         void *hdr;
10412
10413         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10414
10415         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10416         if (!msg)
10417                 return;
10418
10419         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10420         if (!hdr) {
10421                 nlmsg_free(msg);
10422                 return;
10423         }
10424
10425         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10426             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10427             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10428                 goto nla_put_failure;
10429
10430         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10431         if (!pinfoattr)
10432                 goto nla_put_failure;
10433
10434         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10435                 goto nla_put_failure;
10436
10437         nla_nest_end(msg, pinfoattr);
10438
10439         genlmsg_end(msg, hdr);
10440
10441         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10442                                 nl80211_mlme_mcgrp.id, gfp);
10443         return;
10444
10445  nla_put_failure:
10446         genlmsg_cancel(msg, hdr);
10447         nlmsg_free(msg);
10448 }
10449 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10450
10451 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10452                            u64 cookie, bool acked, gfp_t gfp)
10453 {
10454         struct wireless_dev *wdev = dev->ieee80211_ptr;
10455         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10456         struct sk_buff *msg;
10457         void *hdr;
10458
10459         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10460
10461         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10462
10463         if (!msg)
10464                 return;
10465
10466         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10467         if (!hdr) {
10468                 nlmsg_free(msg);
10469                 return;
10470         }
10471
10472         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10473             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10474             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10475             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10476             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10477                 goto nla_put_failure;
10478
10479         genlmsg_end(msg, hdr);
10480
10481         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10482                                 nl80211_mlme_mcgrp.id, gfp);
10483         return;
10484
10485  nla_put_failure:
10486         genlmsg_cancel(msg, hdr);
10487         nlmsg_free(msg);
10488 }
10489 EXPORT_SYMBOL(cfg80211_probe_status);
10490
10491 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10492                                  const u8 *frame, size_t len,
10493                                  int freq, int sig_dbm)
10494 {
10495         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10496         struct sk_buff *msg;
10497         void *hdr;
10498         struct cfg80211_beacon_registration *reg;
10499
10500         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10501
10502         spin_lock_bh(&rdev->beacon_registrations_lock);
10503         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10504                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10505                 if (!msg) {
10506                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10507                         return;
10508                 }
10509
10510                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10511                 if (!hdr)
10512                         goto nla_put_failure;
10513
10514                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10515                     (freq &&
10516                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10517                     (sig_dbm &&
10518                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10519                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10520                         goto nla_put_failure;
10521
10522                 genlmsg_end(msg, hdr);
10523
10524                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10525         }
10526         spin_unlock_bh(&rdev->beacon_registrations_lock);
10527         return;
10528
10529  nla_put_failure:
10530         spin_unlock_bh(&rdev->beacon_registrations_lock);
10531         if (hdr)
10532                 genlmsg_cancel(msg, hdr);
10533         nlmsg_free(msg);
10534 }
10535 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10536
10537 #ifdef CONFIG_PM
10538 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10539                                    struct cfg80211_wowlan_wakeup *wakeup,
10540                                    gfp_t gfp)
10541 {
10542         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10543         struct sk_buff *msg;
10544         void *hdr;
10545         int size = 200;
10546
10547         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10548
10549         if (wakeup)
10550                 size += wakeup->packet_present_len;
10551
10552         msg = nlmsg_new(size, gfp);
10553         if (!msg)
10554                 return;
10555
10556         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10557         if (!hdr)
10558                 goto free_msg;
10559
10560         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10561             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10562                 goto free_msg;
10563
10564         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10565                                         wdev->netdev->ifindex))
10566                 goto free_msg;
10567
10568         if (wakeup) {
10569                 struct nlattr *reasons;
10570
10571                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10572
10573                 if (wakeup->disconnect &&
10574                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10575                         goto free_msg;
10576                 if (wakeup->magic_pkt &&
10577                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10578                         goto free_msg;
10579                 if (wakeup->gtk_rekey_failure &&
10580                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10581                         goto free_msg;
10582                 if (wakeup->eap_identity_req &&
10583                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10584                         goto free_msg;
10585                 if (wakeup->four_way_handshake &&
10586                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10587                         goto free_msg;
10588                 if (wakeup->rfkill_release &&
10589                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10590                         goto free_msg;
10591
10592                 if (wakeup->pattern_idx >= 0 &&
10593                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10594                                 wakeup->pattern_idx))
10595                         goto free_msg;
10596
10597                 if (wakeup->tcp_match)
10598                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10599
10600                 if (wakeup->tcp_connlost)
10601                         nla_put_flag(msg,
10602                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10603
10604                 if (wakeup->tcp_nomoretokens)
10605                         nla_put_flag(msg,
10606                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10607
10608                 if (wakeup->packet) {
10609                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10610                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10611
10612                         if (!wakeup->packet_80211) {
10613                                 pkt_attr =
10614                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10615                                 len_attr =
10616                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10617                         }
10618
10619                         if (wakeup->packet_len &&
10620                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10621                                 goto free_msg;
10622
10623                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10624                                     wakeup->packet))
10625                                 goto free_msg;
10626                 }
10627
10628                 nla_nest_end(msg, reasons);
10629         }
10630
10631         genlmsg_end(msg, hdr);
10632
10633         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10634                                 nl80211_mlme_mcgrp.id, gfp);
10635         return;
10636
10637  free_msg:
10638         nlmsg_free(msg);
10639 }
10640 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10641 #endif
10642
10643 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10644                                 enum nl80211_tdls_operation oper,
10645                                 u16 reason_code, gfp_t gfp)
10646 {
10647         struct wireless_dev *wdev = dev->ieee80211_ptr;
10648         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10649         struct sk_buff *msg;
10650         void *hdr;
10651
10652         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10653                                          reason_code);
10654
10655         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10656         if (!msg)
10657                 return;
10658
10659         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10660         if (!hdr) {
10661                 nlmsg_free(msg);
10662                 return;
10663         }
10664
10665         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10666             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10667             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10668             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10669             (reason_code > 0 &&
10670              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10671                 goto nla_put_failure;
10672
10673         genlmsg_end(msg, hdr);
10674
10675         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10676                                 nl80211_mlme_mcgrp.id, gfp);
10677         return;
10678
10679  nla_put_failure:
10680         genlmsg_cancel(msg, hdr);
10681         nlmsg_free(msg);
10682 }
10683 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10684
10685 static int nl80211_netlink_notify(struct notifier_block * nb,
10686                                   unsigned long state,
10687                                   void *_notify)
10688 {
10689         struct netlink_notify *notify = _notify;
10690         struct cfg80211_registered_device *rdev;
10691         struct wireless_dev *wdev;
10692         struct cfg80211_beacon_registration *reg, *tmp;
10693
10694         if (state != NETLINK_URELEASE)
10695                 return NOTIFY_DONE;
10696
10697         rcu_read_lock();
10698
10699         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10700                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10701                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10702
10703                 spin_lock_bh(&rdev->beacon_registrations_lock);
10704                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10705                                          list) {
10706                         if (reg->nlportid == notify->portid) {
10707                                 list_del(&reg->list);
10708                                 kfree(reg);
10709                                 break;
10710                         }
10711                 }
10712                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10713         }
10714
10715         rcu_read_unlock();
10716
10717         return NOTIFY_DONE;
10718 }
10719
10720 static struct notifier_block nl80211_netlink_notifier = {
10721         .notifier_call = nl80211_netlink_notify,
10722 };
10723
10724 void cfg80211_ft_event(struct net_device *netdev,
10725                        struct cfg80211_ft_event_params *ft_event)
10726 {
10727         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
10728         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10729         struct sk_buff *msg;
10730         void *hdr;
10731
10732         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
10733
10734         if (!ft_event->target_ap)
10735                 return;
10736
10737         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10738         if (!msg)
10739                 return;
10740
10741         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
10742         if (!hdr) {
10743                 nlmsg_free(msg);
10744                 return;
10745         }
10746
10747         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
10748         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
10749         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
10750         if (ft_event->ies)
10751                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
10752         if (ft_event->ric_ies)
10753                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
10754                         ft_event->ric_ies);
10755
10756         genlmsg_end(msg, hdr);
10757
10758         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10759                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10760 }
10761 EXPORT_SYMBOL(cfg80211_ft_event);
10762
10763 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
10764 {
10765         struct cfg80211_registered_device *rdev;
10766         struct sk_buff *msg;
10767         void *hdr;
10768         u32 nlportid;
10769
10770         rdev = wiphy_to_dev(wdev->wiphy);
10771         if (!rdev->crit_proto_nlportid)
10772                 return;
10773
10774         nlportid = rdev->crit_proto_nlportid;
10775         rdev->crit_proto_nlportid = 0;
10776
10777         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10778         if (!msg)
10779                 return;
10780
10781         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
10782         if (!hdr)
10783                 goto nla_put_failure;
10784
10785         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10786             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10787                 goto nla_put_failure;
10788
10789         genlmsg_end(msg, hdr);
10790
10791         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10792         return;
10793
10794  nla_put_failure:
10795         if (hdr)
10796                 genlmsg_cancel(msg, hdr);
10797         nlmsg_free(msg);
10798
10799 }
10800 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
10801
10802 /* initialisation/exit functions */
10803
10804 int nl80211_init(void)
10805 {
10806         int err;
10807
10808         err = genl_register_family_with_ops(&nl80211_fam,
10809                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10810         if (err)
10811                 return err;
10812
10813         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10814         if (err)
10815                 goto err_out;
10816
10817         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10818         if (err)
10819                 goto err_out;
10820
10821         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10822         if (err)
10823                 goto err_out;
10824
10825         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10826         if (err)
10827                 goto err_out;
10828
10829 #ifdef CONFIG_NL80211_TESTMODE
10830         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10831         if (err)
10832                 goto err_out;
10833 #endif
10834
10835         err = netlink_register_notifier(&nl80211_netlink_notifier);
10836         if (err)
10837                 goto err_out;
10838
10839         return 0;
10840  err_out:
10841         genl_unregister_family(&nl80211_fam);
10842         return err;
10843 }
10844
10845 void nl80211_exit(void)
10846 {
10847         netlink_unregister_notifier(&nl80211_netlink_notifier);
10848         genl_unregister_family(&nl80211_fam);
10849 }