net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  41         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  42         .hdrsize = 0,                   /* no private header */
  43         .version = 1,                   /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         ASSERT_RTNL();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94
  95                 if (result)
  96                         break;
  97         }
  98
  99         if (result)
 100                 return result;
 101         return ERR_PTR(-ENODEV);
 102 }
 103
 104 static struct cfg80211_registered_device *
 105 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 106 {
 107         struct cfg80211_registered_device *rdev = NULL, *tmp;
 108         struct net_device *netdev;
 109
 110         ASSERT_RTNL();
 111
 112         if (!attrs[NL80211_ATTR_WIPHY] &&
 113             !attrs[NL80211_ATTR_IFINDEX] &&
 114             !attrs[NL80211_ATTR_WDEV])
 115                 return ERR_PTR(-EINVAL);
 116
 117         if (attrs[NL80211_ATTR_WIPHY])
 118                 rdev = cfg80211_rdev_by_wiphy_idx(
 119                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 120
 121         if (attrs[NL80211_ATTR_WDEV]) {
 122                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 123                 struct wireless_dev *wdev;
 124                 bool found = false;
 125
 126                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 127                 if (tmp) {
 128                         /* make sure wdev exists */
 129                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 130                                 if (wdev->identifier != (u32)wdev_id)
 131                                         continue;
 132                                 found = true;
 133                                 break;
 134                         }
 135
 136                         if (!found)
 137                                 tmp = NULL;
 138
 139                         if (rdev && tmp != rdev)
 140                                 return ERR_PTR(-EINVAL);
 141                         rdev = tmp;
 142                 }
 143         }
 144
 145         if (attrs[NL80211_ATTR_IFINDEX]) {
 146                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 147                 netdev = dev_get_by_index(netns, ifindex);
 148                 if (netdev) {
 149                         if (netdev->ieee80211_ptr)
 150                                 tmp = wiphy_to_dev(
 151                                                 netdev->ieee80211_ptr->wiphy);
 152                         else
 153                                 tmp = NULL;
 154
 155                         dev_put(netdev);
 156
 157                         /* not wireless device -- return error */
 158                         if (!tmp)
 159                                 return ERR_PTR(-EINVAL);
 160
 161                         /* mismatch -- return error */
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         rdev = tmp;
 166                 }
 167         }
 168
 169         if (!rdev)
 170                 return ERR_PTR(-ENODEV);
 171
 172         if (netns != wiphy_net(&rdev->wiphy))
 173                 return ERR_PTR(-ENODEV);
 174
 175         return rdev;
 176 }
 177
 178 /*
 179  * This function returns a pointer to the driver
 180  * that the genl_info item that is passed refers to.
 181  *
 182  * The result of this can be a PTR_ERR and hence must
 183  * be checked with IS_ERR() for errors.
 184  */
 185 static struct cfg80211_registered_device *
 186 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 187 {
 188         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 189 }
 190
 191 /* policy for the attributes */
 192 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 193         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 194         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 195                                       .len = 20-1 },
 196         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 197
 198         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 199         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 200         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 201         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 202         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 203
 204         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 205         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 206         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 207         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 208         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 209
 210         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 211         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 212         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 213
 214         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 215         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 216
 217         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 218         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 219                                     .len = WLAN_MAX_KEY_LEN },
 220         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 221         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 222         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 223         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 224         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 227         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 229                                        .len = IEEE80211_MAX_DATA_LEN },
 230         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 231                                        .len = IEEE80211_MAX_DATA_LEN },
 232         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 233         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 234         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 235         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 236                                                .len = NL80211_MAX_SUPP_RATES },
 237         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 238         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 239         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 240         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 241                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 242         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 243
 244         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 245         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 246
 247         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 248         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 249         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 250         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 251                                            .len = NL80211_MAX_SUPP_RATES },
 252         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 253
 254         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 255         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 256
 257         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 258
 259         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 261                               .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 264
 265         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 266                                 .len = IEEE80211_MAX_SSID_LEN },
 267         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 268         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 269         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 270         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 271         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 272         [NL80211_ATTR_STA_FLAGS2] = {
 273                 .len = sizeof(struct nl80211_sta_flag_update),
 274         },
 275         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 276         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 277         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 278         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 280         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 281         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 282         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 283         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 284                                  .len = WLAN_PMKID_LEN },
 285         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 286         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 287         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 288         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 289                                  .len = IEEE80211_MAX_DATA_LEN },
 290         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 291         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 292         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 293         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 295         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 296         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 297         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 300         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 301         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 303         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 304         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 305         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 306         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 308         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 309         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 310                                          .len = IEEE80211_MAX_DATA_LEN },
 311         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 312                                          .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 314         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 316         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 317         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 318         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 319         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 320         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 322         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 323                                       .len = IEEE80211_MAX_DATA_LEN },
 324         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 325         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 327                 .len = NL80211_HT_CAPABILITY_LEN
 328         },
 329         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 330         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 331         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 332         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 333         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 334         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 335         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 336         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 337         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 338         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 339         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 340         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 341         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 342         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 343         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 344         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 346                 .len = NL80211_VHT_CAPABILITY_LEN,
 347         },
 348         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 349         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 350                                   .len = IEEE80211_MAX_DATA_LEN },
 351         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 352 };
 353
 354 /* policy for the key attributes */
 355 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 356         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 357         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 358         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 359         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 360         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 361         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 362         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 363         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 364 };
 365
 366 /* policy for the key default flags */
 367 static const struct nla_policy
 368 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 369         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 370         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 371 };
 372
 373 /* policy for WoWLAN attributes */
 374 static const struct nla_policy
 375 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 376         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 377         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 378         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 379         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 380         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 381         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 382         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 383         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 384         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 385 };
 386
 387 static const struct nla_policy
 388 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 389         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 390         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 391         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 392         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 393         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 394         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 395         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 396                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 397         },
 398         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 399                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 400         },
 401         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 402         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 403         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 404 };
 405
 406 /* policy for GTK rekey offload attributes */
 407 static const struct nla_policy
 408 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 409         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 410         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 411         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 412 };
 413
 414 static const struct nla_policy
 415 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 416         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 417                                                  .len = IEEE80211_MAX_SSID_LEN },
 418         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 419 };
 420
 421 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 422                                      struct netlink_callback *cb,
 423                                      struct cfg80211_registered_device **rdev,
 424                                      struct wireless_dev **wdev)
 425 {
 426         int err;
 427
 428         rtnl_lock();
 429
 430         if (!cb->args[0]) {
 431                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 432                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 433                                   nl80211_policy);
 434                 if (err)
 435                         goto out_unlock;
 436
 437                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 438                                                    nl80211_fam.attrbuf);
 439                 if (IS_ERR(*wdev)) {
 440                         err = PTR_ERR(*wdev);
 441                         goto out_unlock;
 442                 }
 443                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 444                 cb->args[0] = (*rdev)->wiphy_idx;
 445                 cb->args[1] = (*wdev)->identifier;
 446         } else {
 447                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0]);
 448                 struct wireless_dev *tmp;
 449
 450                 if (!wiphy) {
 451                         err = -ENODEV;
 452                         goto out_unlock;
 453                 }
 454                 *rdev = wiphy_to_dev(wiphy);
 455                 *wdev = NULL;
 456
 457                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 458                         if (tmp->identifier == cb->args[1]) {
 459                                 *wdev = tmp;
 460                                 break;
 461                         }
 462                 }
 463
 464                 if (!*wdev) {
 465                         err = -ENODEV;
 466                         goto out_unlock;
 467                 }
 468         }
 469
 470         return 0;
 471  out_unlock:
 472         rtnl_unlock();
 473         return err;
 474 }
 475
 476 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 477 {
 478         rtnl_unlock();
 479 }
 480
 481 /* IE validation */
 482 static bool is_valid_ie_attr(const struct nlattr *attr)
 483 {
 484         const u8 *pos;
 485         int len;
 486
 487         if (!attr)
 488                 return true;
 489
 490         pos = nla_data(attr);
 491         len = nla_len(attr);
 492
 493         while (len) {
 494                 u8 elemlen;
 495
 496                 if (len < 2)
 497                         return false;
 498                 len -= 2;
 499
 500                 elemlen = pos[1];
 501                 if (elemlen > len)
 502                         return false;
 503
 504                 len -= elemlen;
 505                 pos += 2 + elemlen;
 506         }
 507
 508         return true;
 509 }
 510
 511 /* message building helper */
 512 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 513                                    int flags, u8 cmd)
 514 {
 515         /* since there is no private header just add the generic one */
 516         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 517 }
 518
 519 static int nl80211_msg_put_channel(struct sk_buff *msg,
 520                                    struct ieee80211_channel *chan,
 521                                    bool large)
 522 {
 523         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 524                         chan->center_freq))
 525                 goto nla_put_failure;
 526
 527         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 528             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 529                 goto nla_put_failure;
 530         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 531             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 532                 goto nla_put_failure;
 533         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 534             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 535                 goto nla_put_failure;
 536         if (chan->flags & IEEE80211_CHAN_RADAR) {
 537                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 538                         goto nla_put_failure;
 539                 if (large) {
 540                         u32 time;
 541
 542                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 543
 544                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 545                                         chan->dfs_state))
 546                                 goto nla_put_failure;
 547                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 548                                         time))
 549                                 goto nla_put_failure;
 550                 }
 551         }
 552
 553         if (large) {
 554                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 555                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 556                         goto nla_put_failure;
 557                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 558                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 559                         goto nla_put_failure;
 560                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 561                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 562                         goto nla_put_failure;
 563                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 564                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 565                         goto nla_put_failure;
 566         }
 567
 568         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 569                         DBM_TO_MBM(chan->max_power)))
 570                 goto nla_put_failure;
 571
 572         return 0;
 573
 574  nla_put_failure:
 575         return -ENOBUFS;
 576 }
 577
 578 /* netlink command implementations */
 579
 580 struct key_parse {
 581         struct key_params p;
 582         int idx;
 583         int type;
 584         bool def, defmgmt;
 585         bool def_uni, def_multi;
 586 };
 587
 588 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 589 {
 590         struct nlattr *tb[NL80211_KEY_MAX + 1];
 591         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 592                                    nl80211_key_policy);
 593         if (err)
 594                 return err;
 595
 596         k->def = !!tb[NL80211_KEY_DEFAULT];
 597         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 598
 599         if (k->def) {
 600                 k->def_uni = true;
 601                 k->def_multi = true;
 602         }
 603         if (k->defmgmt)
 604                 k->def_multi = true;
 605
 606         if (tb[NL80211_KEY_IDX])
 607                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 608
 609         if (tb[NL80211_KEY_DATA]) {
 610                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 611                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 612         }
 613
 614         if (tb[NL80211_KEY_SEQ]) {
 615                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 616                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 617         }
 618
 619         if (tb[NL80211_KEY_CIPHER])
 620                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 621
 622         if (tb[NL80211_KEY_TYPE]) {
 623                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 624                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 625                         return -EINVAL;
 626         }
 627
 628         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 629                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 630                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 631                                        tb[NL80211_KEY_DEFAULT_TYPES],
 632                                        nl80211_key_default_policy);
 633                 if (err)
 634                         return err;
 635
 636                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 637                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 638         }
 639
 640         return 0;
 641 }
 642
 643 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 644 {
 645         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 646                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 647                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 648         }
 649
 650         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 651                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 652                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 653         }
 654
 655         if (info->attrs[NL80211_ATTR_KEY_IDX])
 656                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 657
 658         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 659                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 660
 661         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 662         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 663
 664         if (k->def) {
 665                 k->def_uni = true;
 666                 k->def_multi = true;
 667         }
 668         if (k->defmgmt)
 669                 k->def_multi = true;
 670
 671         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 672                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 673                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 674                         return -EINVAL;
 675         }
 676
 677         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 678                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 679                 int err = nla_parse_nested(
 680                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 681                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 682                                 nl80211_key_default_policy);
 683                 if (err)
 684                         return err;
 685
 686                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 687                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 688         }
 689
 690         return 0;
 691 }
 692
 693 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 694 {
 695         int err;
 696
 697         memset(k, 0, sizeof(*k));
 698         k->idx = -1;
 699         k->type = -1;
 700
 701         if (info->attrs[NL80211_ATTR_KEY])
 702                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 703         else
 704                 err = nl80211_parse_key_old(info, k);
 705
 706         if (err)
 707                 return err;
 708
 709         if (k->def && k->defmgmt)
 710                 return -EINVAL;
 711
 712         if (k->defmgmt) {
 713                 if (k->def_uni || !k->def_multi)
 714                         return -EINVAL;
 715         }
 716
 717         if (k->idx != -1) {
 718                 if (k->defmgmt) {
 719                         if (k->idx < 4 || k->idx > 5)
 720                                 return -EINVAL;
 721                 } else if (k->def) {
 722                         if (k->idx < 0 || k->idx > 3)
 723                                 return -EINVAL;
 724                 } else {
 725                         if (k->idx < 0 || k->idx > 5)
 726                                 return -EINVAL;
 727                 }
 728         }
 729
 730         return 0;
 731 }
 732
 733 static struct cfg80211_cached_keys *
 734 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 735                        struct nlattr *keys, bool *no_ht)
 736 {
 737         struct key_parse parse;
 738         struct nlattr *key;
 739         struct cfg80211_cached_keys *result;
 740         int rem, err, def = 0;
 741
 742         result = kzalloc(sizeof(*result), GFP_KERNEL);
 743         if (!result)
 744                 return ERR_PTR(-ENOMEM);
 745
 746         result->def = -1;
 747         result->defmgmt = -1;
 748
 749         nla_for_each_nested(key, keys, rem) {
 750                 memset(&parse, 0, sizeof(parse));
 751                 parse.idx = -1;
 752
 753                 err = nl80211_parse_key_new(key, &parse);
 754                 if (err)
 755                         goto error;
 756                 err = -EINVAL;
 757                 if (!parse.p.key)
 758                         goto error;
 759                 if (parse.idx < 0 || parse.idx > 4)
 760                         goto error;
 761                 if (parse.def) {
 762                         if (def)
 763                                 goto error;
 764                         def = 1;
 765                         result->def = parse.idx;
 766                         if (!parse.def_uni || !parse.def_multi)
 767                                 goto error;
 768                 } else if (parse.defmgmt)
 769                         goto error;
 770                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 771                                                      parse.idx, false, NULL);
 772                 if (err)
 773                         goto error;
 774                 result->params[parse.idx].cipher = parse.p.cipher;
 775                 result->params[parse.idx].key_len = parse.p.key_len;
 776                 result->params[parse.idx].key = result->data[parse.idx];
 777                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 778
 779                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 780                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 781                         if (no_ht)
 782                                 *no_ht = true;
 783                 }
 784         }
 785
 786         return result;
 787  error:
 788         kfree(result);
 789         return ERR_PTR(err);
 790 }
 791
 792 static int nl80211_key_allowed(struct wireless_dev *wdev)
 793 {
 794         ASSERT_WDEV_LOCK(wdev);
 795
 796         switch (wdev->iftype) {
 797         case NL80211_IFTYPE_AP:
 798         case NL80211_IFTYPE_AP_VLAN:
 799         case NL80211_IFTYPE_P2P_GO:
 800         case NL80211_IFTYPE_MESH_POINT:
 801                 break;
 802         case NL80211_IFTYPE_ADHOC:
 803         case NL80211_IFTYPE_STATION:
 804         case NL80211_IFTYPE_P2P_CLIENT:
 805                 if (!wdev->current_bss)
 806                         return -ENOLINK;
 807                 break;
 808         default:
 809                 return -EINVAL;
 810         }
 811
 812         return 0;
 813 }
 814
 815 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 816 {
 817         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 818         int i;
 819
 820         if (!nl_modes)
 821                 goto nla_put_failure;
 822
 823         i = 0;
 824         while (ifmodes) {
 825                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 826                         goto nla_put_failure;
 827                 ifmodes >>= 1;
 828                 i++;
 829         }
 830
 831         nla_nest_end(msg, nl_modes);
 832         return 0;
 833
 834 nla_put_failure:
 835         return -ENOBUFS;
 836 }
 837
 838 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 839                                           struct sk_buff *msg,
 840                                           bool large)
 841 {
 842         struct nlattr *nl_combis;
 843         int i, j;
 844
 845         nl_combis = nla_nest_start(msg,
 846                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 847         if (!nl_combis)
 848                 goto nla_put_failure;
 849
 850         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 851                 const struct ieee80211_iface_combination *c;
 852                 struct nlattr *nl_combi, *nl_limits;
 853
 854                 c = &wiphy->iface_combinations[i];
 855
 856                 nl_combi = nla_nest_start(msg, i + 1);
 857                 if (!nl_combi)
 858                         goto nla_put_failure;
 859
 860                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 861                 if (!nl_limits)
 862                         goto nla_put_failure;
 863
 864                 for (j = 0; j < c->n_limits; j++) {
 865                         struct nlattr *nl_limit;
 866
 867                         nl_limit = nla_nest_start(msg, j + 1);
 868                         if (!nl_limit)
 869                                 goto nla_put_failure;
 870                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 871                                         c->limits[j].max))
 872                                 goto nla_put_failure;
 873                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 874                                                 c->limits[j].types))
 875                                 goto nla_put_failure;
 876                         nla_nest_end(msg, nl_limit);
 877                 }
 878
 879                 nla_nest_end(msg, nl_limits);
 880
 881                 if (c->beacon_int_infra_match &&
 882                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 883                         goto nla_put_failure;
 884                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 885                                 c->num_different_channels) ||
 886                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 887                                 c->max_interfaces))
 888                         goto nla_put_failure;
 889                 if (large &&
 890                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 891                                 c->radar_detect_widths))
 892                         goto nla_put_failure;
 893
 894                 nla_nest_end(msg, nl_combi);
 895         }
 896
 897         nla_nest_end(msg, nl_combis);
 898
 899         return 0;
 900 nla_put_failure:
 901         return -ENOBUFS;
 902 }
 903
 904 #ifdef CONFIG_PM
 905 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 906                                         struct sk_buff *msg)
 907 {
 908         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 909         struct nlattr *nl_tcp;
 910
 911         if (!tcp)
 912                 return 0;
 913
 914         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 915         if (!nl_tcp)
 916                 return -ENOBUFS;
 917
 918         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 919                         tcp->data_payload_max))
 920                 return -ENOBUFS;
 921
 922         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 923                         tcp->data_payload_max))
 924                 return -ENOBUFS;
 925
 926         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 927                 return -ENOBUFS;
 928
 929         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 930                                 sizeof(*tcp->tok), tcp->tok))
 931                 return -ENOBUFS;
 932
 933         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 934                         tcp->data_interval_max))
 935                 return -ENOBUFS;
 936
 937         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 938                         tcp->wake_payload_max))
 939                 return -ENOBUFS;
 940
 941         nla_nest_end(msg, nl_tcp);
 942         return 0;
 943 }
 944
 945 static int nl80211_send_wowlan(struct sk_buff *msg,
 946                                struct cfg80211_registered_device *dev,
 947                                bool large)
 948 {
 949         struct nlattr *nl_wowlan;
 950
 951         if (!dev->wiphy.wowlan)
 952                 return 0;
 953
 954         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 955         if (!nl_wowlan)
 956                 return -ENOBUFS;
 957
 958         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 959              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 960             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 961              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 962             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 963              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 964             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 965              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 966             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 967              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 968             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 969              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 970             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 971              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 972             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 973              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 974                 return -ENOBUFS;
 975
 976         if (dev->wiphy.wowlan->n_patterns) {
 977                 struct nl80211_wowlan_pattern_support pat = {
 978                         .max_patterns = dev->wiphy.wowlan->n_patterns,
 979                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
 980                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
 981                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
 982                 };
 983
 984                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 985                             sizeof(pat), &pat))
 986                         return -ENOBUFS;
 987         }
 988
 989         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
 990                 return -ENOBUFS;
 991
 992         nla_nest_end(msg, nl_wowlan);
 993
 994         return 0;
 995 }
 996 #endif
 997
 998 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
 999                                       struct ieee80211_supported_band *sband)
1000 {
1001         struct nlattr *nl_rates, *nl_rate;
1002         struct ieee80211_rate *rate;
1003         int i;
1004
1005         /* add HT info */
1006         if (sband->ht_cap.ht_supported &&
1007             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1008                      sizeof(sband->ht_cap.mcs),
1009                      &sband->ht_cap.mcs) ||
1010              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1011                          sband->ht_cap.cap) ||
1012              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1013                         sband->ht_cap.ampdu_factor) ||
1014              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1015                         sband->ht_cap.ampdu_density)))
1016                 return -ENOBUFS;
1017
1018         /* add VHT info */
1019         if (sband->vht_cap.vht_supported &&
1020             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1021                      sizeof(sband->vht_cap.vht_mcs),
1022                      &sband->vht_cap.vht_mcs) ||
1023              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1024                          sband->vht_cap.cap)))
1025                 return -ENOBUFS;
1026
1027         /* add bitrates */
1028         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1029         if (!nl_rates)
1030                 return -ENOBUFS;
1031
1032         for (i = 0; i < sband->n_bitrates; i++) {
1033                 nl_rate = nla_nest_start(msg, i);
1034                 if (!nl_rate)
1035                         return -ENOBUFS;
1036
1037                 rate = &sband->bitrates[i];
1038                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1039                                 rate->bitrate))
1040                         return -ENOBUFS;
1041                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1042                     nla_put_flag(msg,
1043                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1044                         return -ENOBUFS;
1045
1046                 nla_nest_end(msg, nl_rate);
1047         }
1048
1049         nla_nest_end(msg, nl_rates);
1050
1051         return 0;
1052 }
1053
1054 static int
1055 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1056                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1057 {
1058         u16 stypes;
1059         struct nlattr *nl_ftypes, *nl_ifs;
1060         enum nl80211_iftype ift;
1061         int i;
1062
1063         if (!mgmt_stypes)
1064                 return 0;
1065
1066         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1067         if (!nl_ifs)
1068                 return -ENOBUFS;
1069
1070         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1071                 nl_ftypes = nla_nest_start(msg, ift);
1072                 if (!nl_ftypes)
1073                         return -ENOBUFS;
1074                 i = 0;
1075                 stypes = mgmt_stypes[ift].tx;
1076                 while (stypes) {
1077                         if ((stypes & 1) &&
1078                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1079                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1080                                 return -ENOBUFS;
1081                         stypes >>= 1;
1082                         i++;
1083                 }
1084                 nla_nest_end(msg, nl_ftypes);
1085         }
1086
1087         nla_nest_end(msg, nl_ifs);
1088
1089         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1090         if (!nl_ifs)
1091                 return -ENOBUFS;
1092
1093         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1094                 nl_ftypes = nla_nest_start(msg, ift);
1095                 if (!nl_ftypes)
1096                         return -ENOBUFS;
1097                 i = 0;
1098                 stypes = mgmt_stypes[ift].rx;
1099                 while (stypes) {
1100                         if ((stypes & 1) &&
1101                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1102                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1103                                 return -ENOBUFS;
1104                         stypes >>= 1;
1105                         i++;
1106                 }
1107                 nla_nest_end(msg, nl_ftypes);
1108         }
1109         nla_nest_end(msg, nl_ifs);
1110
1111         return 0;
1112 }
1113
1114 struct nl80211_dump_wiphy_state {
1115         s64 filter_wiphy;
1116         long start;
1117         long split_start, band_start, chan_start;
1118         bool split;
1119 };
1120
1121 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1122                               struct sk_buff *msg, u32 portid, u32 seq,
1123                               int flags, struct nl80211_dump_wiphy_state *state)
1124 {
1125         void *hdr;
1126         struct nlattr *nl_bands, *nl_band;
1127         struct nlattr *nl_freqs, *nl_freq;
1128         struct nlattr *nl_cmds;
1129         enum ieee80211_band band;
1130         struct ieee80211_channel *chan;
1131         int i;
1132         const struct ieee80211_txrx_stypes *mgmt_stypes =
1133                                 dev->wiphy.mgmt_stypes;
1134         u32 features;
1135
1136         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1137         if (!hdr)
1138                 return -ENOBUFS;
1139
1140         if (WARN_ON(!state))
1141                 return -EINVAL;
1142
1143         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1144             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1145                            wiphy_name(&dev->wiphy)) ||
1146             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1147                         cfg80211_rdev_list_generation))
1148                 goto nla_put_failure;
1149
1150         switch (state->split_start) {
1151         case 0:
1152                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1153                                dev->wiphy.retry_short) ||
1154                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1155                                dev->wiphy.retry_long) ||
1156                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1157                                 dev->wiphy.frag_threshold) ||
1158                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1159                                 dev->wiphy.rts_threshold) ||
1160                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1161                                dev->wiphy.coverage_class) ||
1162                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1163                                dev->wiphy.max_scan_ssids) ||
1164                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1165                                dev->wiphy.max_sched_scan_ssids) ||
1166                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1167                                 dev->wiphy.max_scan_ie_len) ||
1168                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1169                                 dev->wiphy.max_sched_scan_ie_len) ||
1170                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1171                                dev->wiphy.max_match_sets))
1172                         goto nla_put_failure;
1173
1174                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1175                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1176                         goto nla_put_failure;
1177                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1178                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1179                         goto nla_put_failure;
1180                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1181                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1182                         goto nla_put_failure;
1183                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1184                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1185                         goto nla_put_failure;
1186                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1187                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1188                         goto nla_put_failure;
1189                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1190                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1191                         goto nla_put_failure;
1192                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1193                     nla_put_flag(msg, WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1194                         goto nla_put_failure;
1195
1196                 state->split_start++;
1197                 if (state->split)
1198                         break;
1199         case 1:
1200                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1201                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1202                             dev->wiphy.cipher_suites))
1203                         goto nla_put_failure;
1204
1205                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1206                                dev->wiphy.max_num_pmkids))
1207                         goto nla_put_failure;
1208
1209                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1210                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1211                         goto nla_put_failure;
1212
1213                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1214                                 dev->wiphy.available_antennas_tx) ||
1215                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1216                                 dev->wiphy.available_antennas_rx))
1217                         goto nla_put_failure;
1218
1219                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1220                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1221                                 dev->wiphy.probe_resp_offload))
1222                         goto nla_put_failure;
1223
1224                 if ((dev->wiphy.available_antennas_tx ||
1225                      dev->wiphy.available_antennas_rx) &&
1226                     dev->ops->get_antenna) {
1227                         u32 tx_ant = 0, rx_ant = 0;
1228                         int res;
1229                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1230                         if (!res) {
1231                                 if (nla_put_u32(msg,
1232                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1233                                                 tx_ant) ||
1234                                     nla_put_u32(msg,
1235                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1236                                                 rx_ant))
1237                                         goto nla_put_failure;
1238                         }
1239                 }
1240
1241                 state->split_start++;
1242                 if (state->split)
1243                         break;
1244         case 2:
1245                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1246                                         dev->wiphy.interface_modes))
1247                                 goto nla_put_failure;
1248                 state->split_start++;
1249                 if (state->split)
1250                         break;
1251         case 3:
1252                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1253                 if (!nl_bands)
1254                         goto nla_put_failure;
1255
1256                 for (band = state->band_start;
1257                      band < IEEE80211_NUM_BANDS; band++) {
1258                         struct ieee80211_supported_band *sband;
1259
1260                         sband = dev->wiphy.bands[band];
1261
1262                         if (!sband)
1263                                 continue;
1264
1265                         nl_band = nla_nest_start(msg, band);
1266                         if (!nl_band)
1267                                 goto nla_put_failure;
1268
1269                         switch (state->chan_start) {
1270                         case 0:
1271                                 if (nl80211_send_band_rateinfo(msg, sband))
1272                                         goto nla_put_failure;
1273                                 state->chan_start++;
1274                                 if (state->split)
1275                                         break;
1276                         default:
1277                                 /* add frequencies */
1278                                 nl_freqs = nla_nest_start(
1279                                         msg, NL80211_BAND_ATTR_FREQS);
1280                                 if (!nl_freqs)
1281                                         goto nla_put_failure;
1282
1283                                 for (i = state->chan_start - 1;
1284                                      i < sband->n_channels;
1285                                      i++) {
1286                                         nl_freq = nla_nest_start(msg, i);
1287                                         if (!nl_freq)
1288                                                 goto nla_put_failure;
1289
1290                                         chan = &sband->channels[i];
1291
1292                                         if (nl80211_msg_put_channel(
1293                                                         msg, chan,
1294                                                         state->split))
1295                                                 goto nla_put_failure;
1296
1297                                         nla_nest_end(msg, nl_freq);
1298                                         if (state->split)
1299                                                 break;
1300                                 }
1301                                 if (i < sband->n_channels)
1302                                         state->chan_start = i + 2;
1303                                 else
1304                                         state->chan_start = 0;
1305                                 nla_nest_end(msg, nl_freqs);
1306                         }
1307
1308                         nla_nest_end(msg, nl_band);
1309
1310                         if (state->split) {
1311                                 /* start again here */
1312                                 if (state->chan_start)
1313                                         band--;
1314                                 break;
1315                         }
1316                 }
1317                 nla_nest_end(msg, nl_bands);
1318
1319                 if (band < IEEE80211_NUM_BANDS)
1320                         state->band_start = band + 1;
1321                 else
1322                         state->band_start = 0;
1323
1324                 /* if bands & channels are done, continue outside */
1325                 if (state->band_start == 0 && state->chan_start == 0)
1326                         state->split_start++;
1327                 if (state->split)
1328                         break;
1329         case 4:
1330                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1331                 if (!nl_cmds)
1332                         goto nla_put_failure;
1333
1334                 i = 0;
1335 #define CMD(op, n)                                                      \
1336                  do {                                                   \
1337                         if (dev->ops->op) {                             \
1338                                 i++;                                    \
1339                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1340                                         goto nla_put_failure;           \
1341                         }                                               \
1342                 } while (0)
1343
1344                 CMD(add_virtual_intf, NEW_INTERFACE);
1345                 CMD(change_virtual_intf, SET_INTERFACE);
1346                 CMD(add_key, NEW_KEY);
1347                 CMD(start_ap, START_AP);
1348                 CMD(add_station, NEW_STATION);
1349                 CMD(add_mpath, NEW_MPATH);
1350                 CMD(update_mesh_config, SET_MESH_CONFIG);
1351                 CMD(change_bss, SET_BSS);
1352                 CMD(auth, AUTHENTICATE);
1353                 CMD(assoc, ASSOCIATE);
1354                 CMD(deauth, DEAUTHENTICATE);
1355                 CMD(disassoc, DISASSOCIATE);
1356                 CMD(join_ibss, JOIN_IBSS);
1357                 CMD(join_mesh, JOIN_MESH);
1358                 CMD(set_pmksa, SET_PMKSA);
1359                 CMD(del_pmksa, DEL_PMKSA);
1360                 CMD(flush_pmksa, FLUSH_PMKSA);
1361                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1362                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1363                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1364                 CMD(mgmt_tx, FRAME);
1365                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1366                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1367                         i++;
1368                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1369                                 goto nla_put_failure;
1370                 }
1371                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1372                     dev->ops->join_mesh) {
1373                         i++;
1374                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1375                                 goto nla_put_failure;
1376                 }
1377                 CMD(set_wds_peer, SET_WDS_PEER);
1378                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1379                         CMD(tdls_mgmt, TDLS_MGMT);
1380                         CMD(tdls_oper, TDLS_OPER);
1381                 }
1382                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1383                         CMD(sched_scan_start, START_SCHED_SCAN);
1384                 CMD(probe_client, PROBE_CLIENT);
1385                 CMD(set_noack_map, SET_NOACK_MAP);
1386                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1387                         i++;
1388                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1389                                 goto nla_put_failure;
1390                 }
1391                 CMD(start_p2p_device, START_P2P_DEVICE);
1392                 CMD(set_mcast_rate, SET_MCAST_RATE);
1393                 if (state->split) {
1394                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1395                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1396                 }
1397
1398 #ifdef CONFIG_NL80211_TESTMODE
1399                 CMD(testmode_cmd, TESTMODE);
1400 #endif
1401
1402 #undef CMD
1403
1404                 if (dev->ops->connect || dev->ops->auth) {
1405                         i++;
1406                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1407                                 goto nla_put_failure;
1408                 }
1409
1410                 if (dev->ops->disconnect || dev->ops->deauth) {
1411                         i++;
1412                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1413                                 goto nla_put_failure;
1414                 }
1415
1416                 nla_nest_end(msg, nl_cmds);
1417                 state->split_start++;
1418                 if (state->split)
1419                         break;
1420         case 5:
1421                 if (dev->ops->remain_on_channel &&
1422                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1423                     nla_put_u32(msg,
1424                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1425                                 dev->wiphy.max_remain_on_channel_duration))
1426                         goto nla_put_failure;
1427
1428                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1429                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1430                         goto nla_put_failure;
1431
1432                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1433                         goto nla_put_failure;
1434                 state->split_start++;
1435                 if (state->split)
1436                         break;
1437         case 6:
1438 #ifdef CONFIG_PM
1439                 if (nl80211_send_wowlan(msg, dev, state->split))
1440                         goto nla_put_failure;
1441                 state->split_start++;
1442                 if (state->split)
1443                         break;
1444 #else
1445                 state->split_start++;
1446 #endif
1447         case 7:
1448                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1449                                         dev->wiphy.software_iftypes))
1450                         goto nla_put_failure;
1451
1452                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1453                                                    state->split))
1454                         goto nla_put_failure;
1455
1456                 state->split_start++;
1457                 if (state->split)
1458                         break;
1459         case 8:
1460                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1461                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1462                                 dev->wiphy.ap_sme_capa))
1463                         goto nla_put_failure;
1464
1465                 features = dev->wiphy.features;
1466                 /*
1467                  * We can only add the per-channel limit information if the
1468                  * dump is split, otherwise it makes it too big. Therefore
1469                  * only advertise it in that case.
1470                  */
1471                 if (state->split)
1472                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1473                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1474                         goto nla_put_failure;
1475
1476                 if (dev->wiphy.ht_capa_mod_mask &&
1477                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1478                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1479                             dev->wiphy.ht_capa_mod_mask))
1480                         goto nla_put_failure;
1481
1482                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1483                     dev->wiphy.max_acl_mac_addrs &&
1484                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1485                                 dev->wiphy.max_acl_mac_addrs))
1486                         goto nla_put_failure;
1487
1488                 /*
1489                  * Any information below this point is only available to
1490                  * applications that can deal with it being split. This
1491                  * helps ensure that newly added capabilities don't break
1492                  * older tools by overrunning their buffers.
1493                  *
1494                  * We still increment split_start so that in the split
1495                  * case we'll continue with more data in the next round,
1496                  * but break unconditionally so unsplit data stops here.
1497                  */
1498                 state->split_start++;
1499                 break;
1500         case 9:
1501                 if (dev->wiphy.extended_capabilities &&
1502                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1503                              dev->wiphy.extended_capabilities_len,
1504                              dev->wiphy.extended_capabilities) ||
1505                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1506                              dev->wiphy.extended_capabilities_len,
1507                              dev->wiphy.extended_capabilities_mask)))
1508                         goto nla_put_failure;
1509
1510                 if (dev->wiphy.vht_capa_mod_mask &&
1511                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1512                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1513                             dev->wiphy.vht_capa_mod_mask))
1514                         goto nla_put_failure;
1515
1516                 /* done */
1517                 state->split_start = 0;
1518                 break;
1519         }
1520         return genlmsg_end(msg, hdr);
1521
1522  nla_put_failure:
1523         genlmsg_cancel(msg, hdr);
1524         return -EMSGSIZE;
1525 }
1526
1527 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1528                                     struct netlink_callback *cb,
1529                                     struct nl80211_dump_wiphy_state *state)
1530 {
1531         struct nlattr **tb = nl80211_fam.attrbuf;
1532         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1533                               tb, nl80211_fam.maxattr, nl80211_policy);
1534         /* ignore parse errors for backward compatibility */
1535         if (ret)
1536                 return 0;
1537
1538         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1539         if (tb[NL80211_ATTR_WIPHY])
1540                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1541         if (tb[NL80211_ATTR_WDEV])
1542                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1543         if (tb[NL80211_ATTR_IFINDEX]) {
1544                 struct net_device *netdev;
1545                 struct cfg80211_registered_device *rdev;
1546                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1547
1548                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1549                 if (!netdev)
1550                         return -ENODEV;
1551                 if (netdev->ieee80211_ptr) {
1552                         rdev = wiphy_to_dev(
1553                                 netdev->ieee80211_ptr->wiphy);
1554                         state->filter_wiphy = rdev->wiphy_idx;
1555                 }
1556                 dev_put(netdev);
1557         }
1558
1559         return 0;
1560 }
1561
1562 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1563 {
1564         int idx = 0, ret;
1565         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1566         struct cfg80211_registered_device *dev;
1567
1568         rtnl_lock();
1569         if (!state) {
1570                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1571                 if (!state) {
1572                         rtnl_unlock();
1573                         return -ENOMEM;
1574                 }
1575                 state->filter_wiphy = -1;
1576                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1577                 if (ret) {
1578                         kfree(state);
1579                         rtnl_unlock();
1580                         return ret;
1581                 }
1582                 cb->args[0] = (long)state;
1583         }
1584
1585         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1586                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1587                         continue;
1588                 if (++idx <= state->start)
1589                         continue;
1590                 if (state->filter_wiphy != -1 &&
1591                     state->filter_wiphy != dev->wiphy_idx)
1592                         continue;
1593                 /* attempt to fit multiple wiphy data chunks into the skb */
1594                 do {
1595                         ret = nl80211_send_wiphy(dev, skb,
1596                                                  NETLINK_CB(cb->skb).portid,
1597                                                  cb->nlh->nlmsg_seq,
1598                                                  NLM_F_MULTI, state);
1599                         if (ret < 0) {
1600                                 /*
1601                                  * If sending the wiphy data didn't fit (ENOBUFS
1602                                  * or EMSGSIZE returned), this SKB is still
1603                                  * empty (so it's not too big because another
1604                                  * wiphy dataset is already in the skb) and
1605                                  * we've not tried to adjust the dump allocation
1606                                  * yet ... then adjust the alloc size to be
1607                                  * bigger, and return 1 but with the empty skb.
1608                                  * This results in an empty message being RX'ed
1609                                  * in userspace, but that is ignored.
1610                                  *
1611                                  * We can then retry with the larger buffer.
1612                                  */
1613                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1614                                     !skb->len &&
1615                                     cb->min_dump_alloc < 4096) {
1616                                         cb->min_dump_alloc = 4096;
1617                                         rtnl_unlock();
1618                                         return 1;
1619                                 }
1620                                 idx--;
1621                                 break;
1622                         }
1623                 } while (state->split_start > 0);
1624                 break;
1625         }
1626         rtnl_unlock();
1627
1628         state->start = idx;
1629
1630         return skb->len;
1631 }
1632
1633 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1634 {
1635         kfree((void *)cb->args[0]);
1636         return 0;
1637 }
1638
1639 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1640 {
1641         struct sk_buff *msg;
1642         struct cfg80211_registered_device *dev = info->user_ptr[0];
1643         struct nl80211_dump_wiphy_state state = {};
1644
1645         msg = nlmsg_new(4096, GFP_KERNEL);
1646         if (!msg)
1647                 return -ENOMEM;
1648
1649         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1650                                &state) < 0) {
1651                 nlmsg_free(msg);
1652                 return -ENOBUFS;
1653         }
1654
1655         return genlmsg_reply(msg, info);
1656 }
1657
1658 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1659         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1660         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1661         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1662         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1663         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1664 };
1665
1666 static int parse_txq_params(struct nlattr *tb[],
1667                             struct ieee80211_txq_params *txq_params)
1668 {
1669         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1670             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1671             !tb[NL80211_TXQ_ATTR_AIFS])
1672                 return -EINVAL;
1673
1674         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1675         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1676         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1677         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1678         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1679
1680         if (txq_params->ac >= NL80211_NUM_ACS)
1681                 return -EINVAL;
1682
1683         return 0;
1684 }
1685
1686 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1687 {
1688         /*
1689          * You can only set the channel explicitly for WDS interfaces,
1690          * all others have their channel managed via their respective
1691          * "establish a connection" command (connect, join, ...)
1692          *
1693          * For AP/GO and mesh mode, the channel can be set with the
1694          * channel userspace API, but is only stored and passed to the
1695          * low-level driver when the AP starts or the mesh is joined.
1696          * This is for backward compatibility, userspace can also give
1697          * the channel in the start-ap or join-mesh commands instead.
1698          *
1699          * Monitors are special as they are normally slaved to
1700          * whatever else is going on, so they have their own special
1701          * operation to set the monitor channel if possible.
1702          */
1703         return !wdev ||
1704                 wdev->iftype == NL80211_IFTYPE_AP ||
1705                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1706                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1707                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1708 }
1709
1710 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1711                                  struct genl_info *info,
1712                                  struct cfg80211_chan_def *chandef)
1713 {
1714         u32 control_freq;
1715
1716         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1717                 return -EINVAL;
1718
1719         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1720
1721         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1722         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1723         chandef->center_freq1 = control_freq;
1724         chandef->center_freq2 = 0;
1725
1726         /* Primary channel not allowed */
1727         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1728                 return -EINVAL;
1729
1730         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1731                 enum nl80211_channel_type chantype;
1732
1733                 chantype = nla_get_u32(
1734                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1735
1736                 switch (chantype) {
1737                 case NL80211_CHAN_NO_HT:
1738                 case NL80211_CHAN_HT20:
1739                 case NL80211_CHAN_HT40PLUS:
1740                 case NL80211_CHAN_HT40MINUS:
1741                         cfg80211_chandef_create(chandef, chandef->chan,
1742                                                 chantype);
1743                         break;
1744                 default:
1745                         return -EINVAL;
1746                 }
1747         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1748                 chandef->width =
1749                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1750                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1751                         chandef->center_freq1 =
1752                                 nla_get_u32(
1753                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1754                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1755                         chandef->center_freq2 =
1756                                 nla_get_u32(
1757                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1758         }
1759
1760         if (!cfg80211_chandef_valid(chandef))
1761                 return -EINVAL;
1762
1763         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1764                                      IEEE80211_CHAN_DISABLED))
1765                 return -EINVAL;
1766
1767         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1768              chandef->width == NL80211_CHAN_WIDTH_10) &&
1769             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1770                 return -EINVAL;
1771
1772         return 0;
1773 }
1774
1775 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1776                                  struct wireless_dev *wdev,
1777                                  struct genl_info *info)
1778 {
1779         struct cfg80211_chan_def chandef;
1780         int result;
1781         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1782
1783         if (wdev)
1784                 iftype = wdev->iftype;
1785
1786         if (!nl80211_can_set_dev_channel(wdev))
1787                 return -EOPNOTSUPP;
1788
1789         result = nl80211_parse_chandef(rdev, info, &chandef);
1790         if (result)
1791                 return result;
1792
1793         switch (iftype) {
1794         case NL80211_IFTYPE_AP:
1795         case NL80211_IFTYPE_P2P_GO:
1796                 if (wdev->beacon_interval) {
1797                         result = -EBUSY;
1798                         break;
1799                 }
1800                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1801                         result = -EINVAL;
1802                         break;
1803                 }
1804                 wdev->preset_chandef = chandef;
1805                 result = 0;
1806                 break;
1807         case NL80211_IFTYPE_MESH_POINT:
1808                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1809                 break;
1810         case NL80211_IFTYPE_MONITOR:
1811                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1812                 break;
1813         default:
1814                 result = -EINVAL;
1815         }
1816
1817         return result;
1818 }
1819
1820 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1821 {
1822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1823         struct net_device *netdev = info->user_ptr[1];
1824
1825         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1826 }
1827
1828 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1829 {
1830         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1831         struct net_device *dev = info->user_ptr[1];
1832         struct wireless_dev *wdev = dev->ieee80211_ptr;
1833         const u8 *bssid;
1834
1835         if (!info->attrs[NL80211_ATTR_MAC])
1836                 return -EINVAL;
1837
1838         if (netif_running(dev))
1839                 return -EBUSY;
1840
1841         if (!rdev->ops->set_wds_peer)
1842                 return -EOPNOTSUPP;
1843
1844         if (wdev->iftype != NL80211_IFTYPE_WDS)
1845                 return -EOPNOTSUPP;
1846
1847         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1848         return rdev_set_wds_peer(rdev, dev, bssid);
1849 }
1850
1851
1852 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1853 {
1854         struct cfg80211_registered_device *rdev;
1855         struct net_device *netdev = NULL;
1856         struct wireless_dev *wdev;
1857         int result = 0, rem_txq_params = 0;
1858         struct nlattr *nl_txq_params;
1859         u32 changed;
1860         u8 retry_short = 0, retry_long = 0;
1861         u32 frag_threshold = 0, rts_threshold = 0;
1862         u8 coverage_class = 0;
1863
1864         ASSERT_RTNL();
1865
1866         /*
1867          * Try to find the wiphy and netdev. Normally this
1868          * function shouldn't need the netdev, but this is
1869          * done for backward compatibility -- previously
1870          * setting the channel was done per wiphy, but now
1871          * it is per netdev. Previous userland like hostapd
1872          * also passed a netdev to set_wiphy, so that it is
1873          * possible to let that go to the right netdev!
1874          */
1875
1876         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1877                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1878
1879                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1880                 if (netdev && netdev->ieee80211_ptr)
1881                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1882                 else
1883                         netdev = NULL;
1884         }
1885
1886         if (!netdev) {
1887                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1888                                                   info->attrs);
1889                 if (IS_ERR(rdev))
1890                         return PTR_ERR(rdev);
1891                 wdev = NULL;
1892                 netdev = NULL;
1893                 result = 0;
1894         } else
1895                 wdev = netdev->ieee80211_ptr;
1896
1897         /*
1898          * end workaround code, by now the rdev is available
1899          * and locked, and wdev may or may not be NULL.
1900          */
1901
1902         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1903                 result = cfg80211_dev_rename(
1904                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1905
1906         if (result)
1907                 goto bad_res;
1908
1909         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1910                 struct ieee80211_txq_params txq_params;
1911                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1912
1913                 if (!rdev->ops->set_txq_params) {
1914                         result = -EOPNOTSUPP;
1915                         goto bad_res;
1916                 }
1917
1918                 if (!netdev) {
1919                         result = -EINVAL;
1920                         goto bad_res;
1921                 }
1922
1923                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1924                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1925                         result = -EINVAL;
1926                         goto bad_res;
1927                 }
1928
1929                 if (!netif_running(netdev)) {
1930                         result = -ENETDOWN;
1931                         goto bad_res;
1932                 }
1933
1934                 nla_for_each_nested(nl_txq_params,
1935                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1936                                     rem_txq_params) {
1937                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1938                                   nla_data(nl_txq_params),
1939                                   nla_len(nl_txq_params),
1940                                   txq_params_policy);
1941                         result = parse_txq_params(tb, &txq_params);
1942                         if (result)
1943                                 goto bad_res;
1944
1945                         result = rdev_set_txq_params(rdev, netdev,
1946                                                      &txq_params);
1947                         if (result)
1948                                 goto bad_res;
1949                 }
1950         }
1951
1952         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1953                 result = __nl80211_set_channel(rdev,
1954                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1955                                 info);
1956                 if (result)
1957                         goto bad_res;
1958         }
1959
1960         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1961                 struct wireless_dev *txp_wdev = wdev;
1962                 enum nl80211_tx_power_setting type;
1963                 int idx, mbm = 0;
1964
1965                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1966                         txp_wdev = NULL;
1967
1968                 if (!rdev->ops->set_tx_power) {
1969                         result = -EOPNOTSUPP;
1970                         goto bad_res;
1971                 }
1972
1973                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1974                 type = nla_get_u32(info->attrs[idx]);
1975
1976                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1977                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1978                         result = -EINVAL;
1979                         goto bad_res;
1980                 }
1981
1982                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1983                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1984                         mbm = nla_get_u32(info->attrs[idx]);
1985                 }
1986
1987                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1988                 if (result)
1989                         goto bad_res;
1990         }
1991
1992         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1993             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1994                 u32 tx_ant, rx_ant;
1995                 if ((!rdev->wiphy.available_antennas_tx &&
1996                      !rdev->wiphy.available_antennas_rx) ||
1997                     !rdev->ops->set_antenna) {
1998                         result = -EOPNOTSUPP;
1999                         goto bad_res;
2000                 }
2001
2002                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2003                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2004
2005                 /* reject antenna configurations which don't match the
2006                  * available antenna masks, except for the "all" mask */
2007                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2008                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2009                         result = -EINVAL;
2010                         goto bad_res;
2011                 }
2012
2013                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2014                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2015
2016                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2017                 if (result)
2018                         goto bad_res;
2019         }
2020
2021         changed = 0;
2022
2023         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2024                 retry_short = nla_get_u8(
2025                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2026                 if (retry_short == 0) {
2027                         result = -EINVAL;
2028                         goto bad_res;
2029                 }
2030                 changed |= WIPHY_PARAM_RETRY_SHORT;
2031         }
2032
2033         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2034                 retry_long = nla_get_u8(
2035                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2036                 if (retry_long == 0) {
2037                         result = -EINVAL;
2038                         goto bad_res;
2039                 }
2040                 changed |= WIPHY_PARAM_RETRY_LONG;
2041         }
2042
2043         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2044                 frag_threshold = nla_get_u32(
2045                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2046                 if (frag_threshold < 256) {
2047                         result = -EINVAL;
2048                         goto bad_res;
2049                 }
2050                 if (frag_threshold != (u32) -1) {
2051                         /*
2052                          * Fragments (apart from the last one) are required to
2053                          * have even length. Make the fragmentation code
2054                          * simpler by stripping LSB should someone try to use
2055                          * odd threshold value.
2056                          */
2057                         frag_threshold &= ~0x1;
2058                 }
2059                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2060         }
2061
2062         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2063                 rts_threshold = nla_get_u32(
2064                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2065                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2066         }
2067
2068         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2069                 coverage_class = nla_get_u8(
2070                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2071                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2072         }
2073
2074         if (changed) {
2075                 u8 old_retry_short, old_retry_long;
2076                 u32 old_frag_threshold, old_rts_threshold;
2077                 u8 old_coverage_class;
2078
2079                 if (!rdev->ops->set_wiphy_params) {
2080                         result = -EOPNOTSUPP;
2081                         goto bad_res;
2082                 }
2083
2084                 old_retry_short = rdev->wiphy.retry_short;
2085                 old_retry_long = rdev->wiphy.retry_long;
2086                 old_frag_threshold = rdev->wiphy.frag_threshold;
2087                 old_rts_threshold = rdev->wiphy.rts_threshold;
2088                 old_coverage_class = rdev->wiphy.coverage_class;
2089
2090                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2091                         rdev->wiphy.retry_short = retry_short;
2092                 if (changed & WIPHY_PARAM_RETRY_LONG)
2093                         rdev->wiphy.retry_long = retry_long;
2094                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2095                         rdev->wiphy.frag_threshold = frag_threshold;
2096                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2097                         rdev->wiphy.rts_threshold = rts_threshold;
2098                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2099                         rdev->wiphy.coverage_class = coverage_class;
2100
2101                 result = rdev_set_wiphy_params(rdev, changed);
2102                 if (result) {
2103                         rdev->wiphy.retry_short = old_retry_short;
2104                         rdev->wiphy.retry_long = old_retry_long;
2105                         rdev->wiphy.frag_threshold = old_frag_threshold;
2106                         rdev->wiphy.rts_threshold = old_rts_threshold;
2107                         rdev->wiphy.coverage_class = old_coverage_class;
2108                 }
2109         }
2110
2111  bad_res:
2112         if (netdev)
2113                 dev_put(netdev);
2114         return result;
2115 }
2116
2117 static inline u64 wdev_id(struct wireless_dev *wdev)
2118 {
2119         return (u64)wdev->identifier |
2120                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2121 }
2122
2123 static int nl80211_send_chandef(struct sk_buff *msg,
2124                                  struct cfg80211_chan_def *chandef)
2125 {
2126         WARN_ON(!cfg80211_chandef_valid(chandef));
2127
2128         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2129                         chandef->chan->center_freq))
2130                 return -ENOBUFS;
2131         switch (chandef->width) {
2132         case NL80211_CHAN_WIDTH_20_NOHT:
2133         case NL80211_CHAN_WIDTH_20:
2134         case NL80211_CHAN_WIDTH_40:
2135                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2136                                 cfg80211_get_chandef_type(chandef)))
2137                         return -ENOBUFS;
2138                 break;
2139         default:
2140                 break;
2141         }
2142         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2143                 return -ENOBUFS;
2144         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2145                 return -ENOBUFS;
2146         if (chandef->center_freq2 &&
2147             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2148                 return -ENOBUFS;
2149         return 0;
2150 }
2151
2152 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2153                               struct cfg80211_registered_device *rdev,
2154                               struct wireless_dev *wdev)
2155 {
2156         struct net_device *dev = wdev->netdev;
2157         void *hdr;
2158
2159         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2160         if (!hdr)
2161                 return -1;
2162
2163         if (dev &&
2164             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2165              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2166                 goto nla_put_failure;
2167
2168         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2169             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2170             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2171             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2172             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2173                         rdev->devlist_generation ^
2174                         (cfg80211_rdev_list_generation << 2)))
2175                 goto nla_put_failure;
2176
2177         if (rdev->ops->get_channel) {
2178                 int ret;
2179                 struct cfg80211_chan_def chandef;
2180
2181                 ret = rdev_get_channel(rdev, wdev, &chandef);
2182                 if (ret == 0) {
2183                         if (nl80211_send_chandef(msg, &chandef))
2184                                 goto nla_put_failure;
2185                 }
2186         }
2187
2188         if (wdev->ssid_len) {
2189                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2190                         goto nla_put_failure;
2191         }
2192
2193         return genlmsg_end(msg, hdr);
2194
2195  nla_put_failure:
2196         genlmsg_cancel(msg, hdr);
2197         return -EMSGSIZE;
2198 }
2199
2200 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2201 {
2202         int wp_idx = 0;
2203         int if_idx = 0;
2204         int wp_start = cb->args[0];
2205         int if_start = cb->args[1];
2206         struct cfg80211_registered_device *rdev;
2207         struct wireless_dev *wdev;
2208
2209         rtnl_lock();
2210         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2211                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2212                         continue;
2213                 if (wp_idx < wp_start) {
2214                         wp_idx++;
2215                         continue;
2216                 }
2217                 if_idx = 0;
2218
2219                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2220                         if (if_idx < if_start) {
2221                                 if_idx++;
2222                                 continue;
2223                         }
2224                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2225                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2226                                                rdev, wdev) < 0) {
2227                                 goto out;
2228                         }
2229                         if_idx++;
2230                 }
2231
2232                 wp_idx++;
2233         }
2234  out:
2235         rtnl_unlock();
2236
2237         cb->args[0] = wp_idx;
2238         cb->args[1] = if_idx;
2239
2240         return skb->len;
2241 }
2242
2243 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2244 {
2245         struct sk_buff *msg;
2246         struct cfg80211_registered_device *dev = info->user_ptr[0];
2247         struct wireless_dev *wdev = info->user_ptr[1];
2248
2249         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2250         if (!msg)
2251                 return -ENOMEM;
2252
2253         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2254                                dev, wdev) < 0) {
2255                 nlmsg_free(msg);
2256                 return -ENOBUFS;
2257         }
2258
2259         return genlmsg_reply(msg, info);
2260 }
2261
2262 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2263         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2264         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2265         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2266         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2267         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2268         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2269 };
2270
2271 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2272 {
2273         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2274         int flag;
2275
2276         *mntrflags = 0;
2277
2278         if (!nla)
2279                 return -EINVAL;
2280
2281         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2282                              nla, mntr_flags_policy))
2283                 return -EINVAL;
2284
2285         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2286                 if (flags[flag])
2287                         *mntrflags |= (1<<flag);
2288
2289         return 0;
2290 }
2291
2292 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2293                                struct net_device *netdev, u8 use_4addr,
2294                                enum nl80211_iftype iftype)
2295 {
2296         if (!use_4addr) {
2297                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2298                         return -EBUSY;
2299                 return 0;
2300         }
2301
2302         switch (iftype) {
2303         case NL80211_IFTYPE_AP_VLAN:
2304                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2305                         return 0;
2306                 break;
2307         case NL80211_IFTYPE_STATION:
2308                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2309                         return 0;
2310                 break;
2311         default:
2312                 break;
2313         }
2314
2315         return -EOPNOTSUPP;
2316 }
2317
2318 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2319 {
2320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2321         struct vif_params params;
2322         int err;
2323         enum nl80211_iftype otype, ntype;
2324         struct net_device *dev = info->user_ptr[1];
2325         u32 _flags, *flags = NULL;
2326         bool change = false;
2327
2328         memset(&params, 0, sizeof(params));
2329
2330         otype = ntype = dev->ieee80211_ptr->iftype;
2331
2332         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2333                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2334                 if (otype != ntype)
2335                         change = true;
2336                 if (ntype > NL80211_IFTYPE_MAX)
2337                         return -EINVAL;
2338         }
2339
2340         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2341                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2342
2343                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2344                         return -EINVAL;
2345                 if (netif_running(dev))
2346                         return -EBUSY;
2347
2348                 wdev_lock(wdev);
2349                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2350                              IEEE80211_MAX_MESH_ID_LEN);
2351                 wdev->mesh_id_up_len =
2352                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2353                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2354                        wdev->mesh_id_up_len);
2355                 wdev_unlock(wdev);
2356         }
2357
2358         if (info->attrs[NL80211_ATTR_4ADDR]) {
2359                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2360                 change = true;
2361                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2362                 if (err)
2363                         return err;
2364         } else {
2365                 params.use_4addr = -1;
2366         }
2367
2368         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2369                 if (ntype != NL80211_IFTYPE_MONITOR)
2370                         return -EINVAL;
2371                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2372                                           &_flags);
2373                 if (err)
2374                         return err;
2375
2376                 flags = &_flags;
2377                 change = true;
2378         }
2379
2380         if (flags && (*flags & NL80211_MNTR_FLAG_ACTIVE) &&
2381             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2382                 return -EOPNOTSUPP;
2383
2384         if (change)
2385                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2386         else
2387                 err = 0;
2388
2389         if (!err && params.use_4addr != -1)
2390                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2391
2392         return err;
2393 }
2394
2395 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2396 {
2397         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2398         struct vif_params params;
2399         struct wireless_dev *wdev;
2400         struct sk_buff *msg;
2401         int err;
2402         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2403         u32 flags;
2404
2405         memset(&params, 0, sizeof(params));
2406
2407         if (!info->attrs[NL80211_ATTR_IFNAME])
2408                 return -EINVAL;
2409
2410         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2411                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2412                 if (type > NL80211_IFTYPE_MAX)
2413                         return -EINVAL;
2414         }
2415
2416         if (!rdev->ops->add_virtual_intf ||
2417             !(rdev->wiphy.interface_modes & (1 << type)))
2418                 return -EOPNOTSUPP;
2419
2420         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2421                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2422                            ETH_ALEN);
2423                 if (!is_valid_ether_addr(params.macaddr))
2424                         return -EADDRNOTAVAIL;
2425         }
2426
2427         if (info->attrs[NL80211_ATTR_4ADDR]) {
2428                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2429                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2430                 if (err)
2431                         return err;
2432         }
2433
2434         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2435         if (!msg)
2436                 return -ENOMEM;
2437
2438         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2439                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2440                                   &flags);
2441
2442         if (!err && (flags & NL80211_MNTR_FLAG_ACTIVE) &&
2443             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2444                 return -EOPNOTSUPP;
2445
2446         wdev = rdev_add_virtual_intf(rdev,
2447                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2448                                 type, err ? NULL : &flags, &params);
2449         if (IS_ERR(wdev)) {
2450                 nlmsg_free(msg);
2451                 return PTR_ERR(wdev);
2452         }
2453
2454         switch (type) {
2455         case NL80211_IFTYPE_MESH_POINT:
2456                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2457                         break;
2458                 wdev_lock(wdev);
2459                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2460                              IEEE80211_MAX_MESH_ID_LEN);
2461                 wdev->mesh_id_up_len =
2462                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2463                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2464                        wdev->mesh_id_up_len);
2465                 wdev_unlock(wdev);
2466                 break;
2467         case NL80211_IFTYPE_P2P_DEVICE:
2468                 /*
2469                  * P2P Device doesn't have a netdev, so doesn't go
2470                  * through the netdev notifier and must be added here
2471                  */
2472                 mutex_init(&wdev->mtx);
2473                 INIT_LIST_HEAD(&wdev->event_list);
2474                 spin_lock_init(&wdev->event_lock);
2475                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2476                 spin_lock_init(&wdev->mgmt_registrations_lock);
2477
2478                 wdev->identifier = ++rdev->wdev_id;
2479                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2480                 rdev->devlist_generation++;
2481                 break;
2482         default:
2483                 break;
2484         }
2485
2486         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2487                                rdev, wdev) < 0) {
2488                 nlmsg_free(msg);
2489                 return -ENOBUFS;
2490         }
2491
2492         return genlmsg_reply(msg, info);
2493 }
2494
2495 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2496 {
2497         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2498         struct wireless_dev *wdev = info->user_ptr[1];
2499
2500         if (!rdev->ops->del_virtual_intf)
2501                 return -EOPNOTSUPP;
2502
2503         /*
2504          * If we remove a wireless device without a netdev then clear
2505          * user_ptr[1] so that nl80211_post_doit won't dereference it
2506          * to check if it needs to do dev_put(). Otherwise it crashes
2507          * since the wdev has been freed, unlike with a netdev where
2508          * we need the dev_put() for the netdev to really be freed.
2509          */
2510         if (!wdev->netdev)
2511                 info->user_ptr[1] = NULL;
2512
2513         return rdev_del_virtual_intf(rdev, wdev);
2514 }
2515
2516 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2517 {
2518         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2519         struct net_device *dev = info->user_ptr[1];
2520         u16 noack_map;
2521
2522         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2523                 return -EINVAL;
2524
2525         if (!rdev->ops->set_noack_map)
2526                 return -EOPNOTSUPP;
2527
2528         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2529
2530         return rdev_set_noack_map(rdev, dev, noack_map);
2531 }
2532
2533 struct get_key_cookie {
2534         struct sk_buff *msg;
2535         int error;
2536         int idx;
2537 };
2538
2539 static void get_key_callback(void *c, struct key_params *params)
2540 {
2541         struct nlattr *key;
2542         struct get_key_cookie *cookie = c;
2543
2544         if ((params->key &&
2545              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2546                      params->key_len, params->key)) ||
2547             (params->seq &&
2548              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2549                      params->seq_len, params->seq)) ||
2550             (params->cipher &&
2551              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2552                          params->cipher)))
2553                 goto nla_put_failure;
2554
2555         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2556         if (!key)
2557                 goto nla_put_failure;
2558
2559         if ((params->key &&
2560              nla_put(cookie->msg, NL80211_KEY_DATA,
2561                      params->key_len, params->key)) ||
2562             (params->seq &&
2563              nla_put(cookie->msg, NL80211_KEY_SEQ,
2564                      params->seq_len, params->seq)) ||
2565             (params->cipher &&
2566              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2567                          params->cipher)))
2568                 goto nla_put_failure;
2569
2570         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2571                 goto nla_put_failure;
2572
2573         nla_nest_end(cookie->msg, key);
2574
2575         return;
2576  nla_put_failure:
2577         cookie->error = 1;
2578 }
2579
2580 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2581 {
2582         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2583         int err;
2584         struct net_device *dev = info->user_ptr[1];
2585         u8 key_idx = 0;
2586         const u8 *mac_addr = NULL;
2587         bool pairwise;
2588         struct get_key_cookie cookie = {
2589                 .error = 0,
2590         };
2591         void *hdr;
2592         struct sk_buff *msg;
2593
2594         if (info->attrs[NL80211_ATTR_KEY_IDX])
2595                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2596
2597         if (key_idx > 5)
2598                 return -EINVAL;
2599
2600         if (info->attrs[NL80211_ATTR_MAC])
2601                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2602
2603         pairwise = !!mac_addr;
2604         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2605                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2606                 if (kt >= NUM_NL80211_KEYTYPES)
2607                         return -EINVAL;
2608                 if (kt != NL80211_KEYTYPE_GROUP &&
2609                     kt != NL80211_KEYTYPE_PAIRWISE)
2610                         return -EINVAL;
2611                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2612         }
2613
2614         if (!rdev->ops->get_key)
2615                 return -EOPNOTSUPP;
2616
2617         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2618         if (!msg)
2619                 return -ENOMEM;
2620
2621         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2622                              NL80211_CMD_NEW_KEY);
2623         if (IS_ERR(hdr))
2624                 return PTR_ERR(hdr);
2625
2626         cookie.msg = msg;
2627         cookie.idx = key_idx;
2628
2629         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2630             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2631                 goto nla_put_failure;
2632         if (mac_addr &&
2633             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2634                 goto nla_put_failure;
2635
2636         if (pairwise && mac_addr &&
2637             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2638                 return -ENOENT;
2639
2640         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2641                            get_key_callback);
2642
2643         if (err)
2644                 goto free_msg;
2645
2646         if (cookie.error)
2647                 goto nla_put_failure;
2648
2649         genlmsg_end(msg, hdr);
2650         return genlmsg_reply(msg, info);
2651
2652  nla_put_failure:
2653         err = -ENOBUFS;
2654  free_msg:
2655         nlmsg_free(msg);
2656         return err;
2657 }
2658
2659 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2660 {
2661         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2662         struct key_parse key;
2663         int err;
2664         struct net_device *dev = info->user_ptr[1];
2665
2666         err = nl80211_parse_key(info, &key);
2667         if (err)
2668                 return err;
2669
2670         if (key.idx < 0)
2671                 return -EINVAL;
2672
2673         /* only support setting default key */
2674         if (!key.def && !key.defmgmt)
2675                 return -EINVAL;
2676
2677         wdev_lock(dev->ieee80211_ptr);
2678
2679         if (key.def) {
2680                 if (!rdev->ops->set_default_key) {
2681                         err = -EOPNOTSUPP;
2682                         goto out;
2683                 }
2684
2685                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2686                 if (err)
2687                         goto out;
2688
2689                 err = rdev_set_default_key(rdev, dev, key.idx,
2690                                                  key.def_uni, key.def_multi);
2691
2692                 if (err)
2693                         goto out;
2694
2695 #ifdef CONFIG_CFG80211_WEXT
2696                 dev->ieee80211_ptr->wext.default_key = key.idx;
2697 #endif
2698         } else {
2699                 if (key.def_uni || !key.def_multi) {
2700                         err = -EINVAL;
2701                         goto out;
2702                 }
2703
2704                 if (!rdev->ops->set_default_mgmt_key) {
2705                         err = -EOPNOTSUPP;
2706                         goto out;
2707                 }
2708
2709                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2710                 if (err)
2711                         goto out;
2712
2713                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2714                 if (err)
2715                         goto out;
2716
2717 #ifdef CONFIG_CFG80211_WEXT
2718                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2719 #endif
2720         }
2721
2722  out:
2723         wdev_unlock(dev->ieee80211_ptr);
2724
2725         return err;
2726 }
2727
2728 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2729 {
2730         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2731         int err;
2732         struct net_device *dev = info->user_ptr[1];
2733         struct key_parse key;
2734         const u8 *mac_addr = NULL;
2735
2736         err = nl80211_parse_key(info, &key);
2737         if (err)
2738                 return err;
2739
2740         if (!key.p.key)
2741                 return -EINVAL;
2742
2743         if (info->attrs[NL80211_ATTR_MAC])
2744                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2745
2746         if (key.type == -1) {
2747                 if (mac_addr)
2748                         key.type = NL80211_KEYTYPE_PAIRWISE;
2749                 else
2750                         key.type = NL80211_KEYTYPE_GROUP;
2751         }
2752
2753         /* for now */
2754         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2755             key.type != NL80211_KEYTYPE_GROUP)
2756                 return -EINVAL;
2757
2758         if (!rdev->ops->add_key)
2759                 return -EOPNOTSUPP;
2760
2761         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2762                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2763                                            mac_addr))
2764                 return -EINVAL;
2765
2766         wdev_lock(dev->ieee80211_ptr);
2767         err = nl80211_key_allowed(dev->ieee80211_ptr);
2768         if (!err)
2769                 err = rdev_add_key(rdev, dev, key.idx,
2770                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2771                                     mac_addr, &key.p);
2772         wdev_unlock(dev->ieee80211_ptr);
2773
2774         return err;
2775 }
2776
2777 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2778 {
2779         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2780         int err;
2781         struct net_device *dev = info->user_ptr[1];
2782         u8 *mac_addr = NULL;
2783         struct key_parse key;
2784
2785         err = nl80211_parse_key(info, &key);
2786         if (err)
2787                 return err;
2788
2789         if (info->attrs[NL80211_ATTR_MAC])
2790                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2791
2792         if (key.type == -1) {
2793                 if (mac_addr)
2794                         key.type = NL80211_KEYTYPE_PAIRWISE;
2795                 else
2796                         key.type = NL80211_KEYTYPE_GROUP;
2797         }
2798
2799         /* for now */
2800         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2801             key.type != NL80211_KEYTYPE_GROUP)
2802                 return -EINVAL;
2803
2804         if (!rdev->ops->del_key)
2805                 return -EOPNOTSUPP;
2806
2807         wdev_lock(dev->ieee80211_ptr);
2808         err = nl80211_key_allowed(dev->ieee80211_ptr);
2809
2810         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2811             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2812                 err = -ENOENT;
2813
2814         if (!err)
2815                 err = rdev_del_key(rdev, dev, key.idx,
2816                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2817                                    mac_addr);
2818
2819 #ifdef CONFIG_CFG80211_WEXT
2820         if (!err) {
2821                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2822                         dev->ieee80211_ptr->wext.default_key = -1;
2823                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2824                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2825         }
2826 #endif
2827         wdev_unlock(dev->ieee80211_ptr);
2828
2829         return err;
2830 }
2831
2832 /* This function returns an error or the number of nested attributes */
2833 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2834 {
2835         struct nlattr *attr;
2836         int n_entries = 0, tmp;
2837
2838         nla_for_each_nested(attr, nl_attr, tmp) {
2839                 if (nla_len(attr) != ETH_ALEN)
2840                         return -EINVAL;
2841
2842                 n_entries++;
2843         }
2844
2845         return n_entries;
2846 }
2847
2848 /*
2849  * This function parses ACL information and allocates memory for ACL data.
2850  * On successful return, the calling function is responsible to free the
2851  * ACL buffer returned by this function.
2852  */
2853 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2854                                                 struct genl_info *info)
2855 {
2856         enum nl80211_acl_policy acl_policy;
2857         struct nlattr *attr;
2858         struct cfg80211_acl_data *acl;
2859         int i = 0, n_entries, tmp;
2860
2861         if (!wiphy->max_acl_mac_addrs)
2862                 return ERR_PTR(-EOPNOTSUPP);
2863
2864         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2865                 return ERR_PTR(-EINVAL);
2866
2867         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2868         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2869             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2870                 return ERR_PTR(-EINVAL);
2871
2872         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2873                 return ERR_PTR(-EINVAL);
2874
2875         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2876         if (n_entries < 0)
2877                 return ERR_PTR(n_entries);
2878
2879         if (n_entries > wiphy->max_acl_mac_addrs)
2880                 return ERR_PTR(-ENOTSUPP);
2881
2882         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2883                       GFP_KERNEL);
2884         if (!acl)
2885                 return ERR_PTR(-ENOMEM);
2886
2887         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2888                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2889                 i++;
2890         }
2891
2892         acl->n_acl_entries = n_entries;
2893         acl->acl_policy = acl_policy;
2894
2895         return acl;
2896 }
2897
2898 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2899 {
2900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2901         struct net_device *dev = info->user_ptr[1];
2902         struct cfg80211_acl_data *acl;
2903         int err;
2904
2905         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2906             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2907                 return -EOPNOTSUPP;
2908
2909         if (!dev->ieee80211_ptr->beacon_interval)
2910                 return -EINVAL;
2911
2912         acl = parse_acl_data(&rdev->wiphy, info);
2913         if (IS_ERR(acl))
2914                 return PTR_ERR(acl);
2915
2916         err = rdev_set_mac_acl(rdev, dev, acl);
2917
2918         kfree(acl);
2919
2920         return err;
2921 }
2922
2923 static int nl80211_parse_beacon(struct nlattr *attrs[],
2924                                 struct cfg80211_beacon_data *bcn)
2925 {
2926         bool haveinfo = false;
2927
2928         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
2929             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
2930             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2931             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2932                 return -EINVAL;
2933
2934         memset(bcn, 0, sizeof(*bcn));
2935
2936         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
2937                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
2938                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
2939                 if (!bcn->head_len)
2940                         return -EINVAL;
2941                 haveinfo = true;
2942         }
2943
2944         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
2945                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
2946                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
2947                 haveinfo = true;
2948         }
2949
2950         if (!haveinfo)
2951                 return -EINVAL;
2952
2953         if (attrs[NL80211_ATTR_IE]) {
2954                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
2955                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
2956         }
2957
2958         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2959                 bcn->proberesp_ies =
2960                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
2961                 bcn->proberesp_ies_len =
2962                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
2963         }
2964
2965         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2966                 bcn->assocresp_ies =
2967                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2968                 bcn->assocresp_ies_len =
2969                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2970         }
2971
2972         if (attrs[NL80211_ATTR_PROBE_RESP]) {
2973                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
2974                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
2975         }
2976
2977         return 0;
2978 }
2979
2980 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2981                                    struct cfg80211_ap_settings *params)
2982 {
2983         struct wireless_dev *wdev;
2984         bool ret = false;
2985
2986         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2987                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2988                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2989                         continue;
2990
2991                 if (!wdev->preset_chandef.chan)
2992                         continue;
2993
2994                 params->chandef = wdev->preset_chandef;
2995                 ret = true;
2996                 break;
2997         }
2998
2999         return ret;
3000 }
3001
3002 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3003                                     enum nl80211_auth_type auth_type,
3004                                     enum nl80211_commands cmd)
3005 {
3006         if (auth_type > NL80211_AUTHTYPE_MAX)
3007                 return false;
3008
3009         switch (cmd) {
3010         case NL80211_CMD_AUTHENTICATE:
3011                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3012                     auth_type == NL80211_AUTHTYPE_SAE)
3013                         return false;
3014                 return true;
3015         case NL80211_CMD_CONNECT:
3016         case NL80211_CMD_START_AP:
3017                 /* SAE not supported yet */
3018                 if (auth_type == NL80211_AUTHTYPE_SAE)
3019                         return false;
3020                 return true;
3021         default:
3022                 return false;
3023         }
3024 }
3025
3026 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3027 {
3028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3029         struct net_device *dev = info->user_ptr[1];
3030         struct wireless_dev *wdev = dev->ieee80211_ptr;
3031         struct cfg80211_ap_settings params;
3032         int err;
3033         u8 radar_detect_width = 0;
3034
3035         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3036             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3037                 return -EOPNOTSUPP;
3038
3039         if (!rdev->ops->start_ap)
3040                 return -EOPNOTSUPP;
3041
3042         if (wdev->beacon_interval)
3043                 return -EALREADY;
3044
3045         memset(&params, 0, sizeof(params));
3046
3047         /* these are required for START_AP */
3048         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3049             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3050             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3051                 return -EINVAL;
3052
3053         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3054         if (err)
3055                 return err;
3056
3057         params.beacon_interval =
3058                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3059         params.dtim_period =
3060                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3061
3062         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3063         if (err)
3064                 return err;
3065
3066         /*
3067          * In theory, some of these attributes should be required here
3068          * but since they were not used when the command was originally
3069          * added, keep them optional for old user space programs to let
3070          * them continue to work with drivers that do not need the
3071          * additional information -- drivers must check!
3072          */
3073         if (info->attrs[NL80211_ATTR_SSID]) {
3074                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3075                 params.ssid_len =
3076                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3077                 if (params.ssid_len == 0 ||
3078                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3079                         return -EINVAL;
3080         }
3081
3082         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3083                 params.hidden_ssid = nla_get_u32(
3084                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3085                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3086                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3087                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3088                         return -EINVAL;
3089         }
3090
3091         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3092
3093         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3094                 params.auth_type = nla_get_u32(
3095                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3096                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3097                                              NL80211_CMD_START_AP))
3098                         return -EINVAL;
3099         } else
3100                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3101
3102         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3103                                       NL80211_MAX_NR_CIPHER_SUITES);
3104         if (err)
3105                 return err;
3106
3107         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3108                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3109                         return -EOPNOTSUPP;
3110                 params.inactivity_timeout = nla_get_u16(
3111                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3112         }
3113
3114         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3115                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3116                         return -EINVAL;
3117                 params.p2p_ctwindow =
3118                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3119                 if (params.p2p_ctwindow > 127)
3120                         return -EINVAL;
3121                 if (params.p2p_ctwindow != 0 &&
3122                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3123                         return -EINVAL;
3124         }
3125
3126         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3127                 u8 tmp;
3128
3129                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3130                         return -EINVAL;
3131                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3132                 if (tmp > 1)
3133                         return -EINVAL;
3134                 params.p2p_opp_ps = tmp;
3135                 if (params.p2p_opp_ps != 0 &&
3136                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3137                         return -EINVAL;
3138         }
3139
3140         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3141                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3142                 if (err)
3143                         return err;
3144         } else if (wdev->preset_chandef.chan) {
3145                 params.chandef = wdev->preset_chandef;
3146         } else if (!nl80211_get_ap_channel(rdev, &params))
3147                 return -EINVAL;
3148
3149         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3150                 return -EINVAL;
3151
3152         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3153         if (err < 0)
3154                 return err;
3155         if (err) {
3156                 radar_detect_width = BIT(params.chandef.width);
3157                 params.radar_required = true;
3158         }
3159
3160         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3161                                            params.chandef.chan,
3162                                            CHAN_MODE_SHARED,
3163                                            radar_detect_width);
3164         if (err)
3165                 return err;
3166
3167         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3168                 params.acl = parse_acl_data(&rdev->wiphy, info);
3169                 if (IS_ERR(params.acl))
3170                         return PTR_ERR(params.acl);
3171         }
3172
3173         err = rdev_start_ap(rdev, dev, &params);
3174         if (!err) {
3175                 wdev->preset_chandef = params.chandef;
3176                 wdev->beacon_interval = params.beacon_interval;
3177                 wdev->channel = params.chandef.chan;
3178                 wdev->ssid_len = params.ssid_len;
3179                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3180         }
3181
3182         kfree(params.acl);
3183
3184         return err;
3185 }
3186
3187 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3188 {
3189         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3190         struct net_device *dev = info->user_ptr[1];
3191         struct wireless_dev *wdev = dev->ieee80211_ptr;
3192         struct cfg80211_beacon_data params;
3193         int err;
3194
3195         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3196             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3197                 return -EOPNOTSUPP;
3198
3199         if (!rdev->ops->change_beacon)
3200                 return -EOPNOTSUPP;
3201
3202         if (!wdev->beacon_interval)
3203                 return -EINVAL;
3204
3205         err = nl80211_parse_beacon(info->attrs, &params);
3206         if (err)
3207                 return err;
3208
3209         return rdev_change_beacon(rdev, dev, &params);
3210 }
3211
3212 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3213 {
3214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3215         struct net_device *dev = info->user_ptr[1];
3216
3217         return cfg80211_stop_ap(rdev, dev);
3218 }
3219
3220 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3221         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3222         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3223         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3224         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3225         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3226         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3227 };
3228
3229 static int parse_station_flags(struct genl_info *info,
3230                                enum nl80211_iftype iftype,
3231                                struct station_parameters *params)
3232 {
3233         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3234         struct nlattr *nla;
3235         int flag;
3236
3237         /*
3238          * Try parsing the new attribute first so userspace
3239          * can specify both for older kernels.
3240          */
3241         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3242         if (nla) {
3243                 struct nl80211_sta_flag_update *sta_flags;
3244
3245                 sta_flags = nla_data(nla);
3246                 params->sta_flags_mask = sta_flags->mask;
3247                 params->sta_flags_set = sta_flags->set;
3248                 params->sta_flags_set &= params->sta_flags_mask;
3249                 if ((params->sta_flags_mask |
3250                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3251                         return -EINVAL;
3252                 return 0;
3253         }
3254
3255         /* if present, parse the old attribute */
3256
3257         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3258         if (!nla)
3259                 return 0;
3260
3261         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3262                              nla, sta_flags_policy))
3263                 return -EINVAL;
3264
3265         /*
3266          * Only allow certain flags for interface types so that
3267          * other attributes are silently ignored. Remember that
3268          * this is backward compatibility code with old userspace
3269          * and shouldn't be hit in other cases anyway.
3270          */
3271         switch (iftype) {
3272         case NL80211_IFTYPE_AP:
3273         case NL80211_IFTYPE_AP_VLAN:
3274         case NL80211_IFTYPE_P2P_GO:
3275                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3276                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3277                                          BIT(NL80211_STA_FLAG_WME) |
3278                                          BIT(NL80211_STA_FLAG_MFP);
3279                 break;
3280         case NL80211_IFTYPE_P2P_CLIENT:
3281         case NL80211_IFTYPE_STATION:
3282                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3283                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3284                 break;
3285         case NL80211_IFTYPE_MESH_POINT:
3286                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3287                                          BIT(NL80211_STA_FLAG_MFP) |
3288                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3289         default:
3290                 return -EINVAL;
3291         }
3292
3293         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3294                 if (flags[flag]) {
3295                         params->sta_flags_set |= (1<<flag);
3296
3297                         /* no longer support new API additions in old API */
3298                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3299                                 return -EINVAL;
3300                 }
3301         }
3302
3303         return 0;
3304 }
3305
3306 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3307                                  int attr)
3308 {
3309         struct nlattr *rate;
3310         u32 bitrate;
3311         u16 bitrate_compat;
3312
3313         rate = nla_nest_start(msg, attr);
3314         if (!rate)
3315                 return false;
3316
3317         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3318         bitrate = cfg80211_calculate_bitrate(info);
3319         /* report 16-bit bitrate only if we can */
3320         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3321         if (bitrate > 0 &&
3322             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3323                 return false;
3324         if (bitrate_compat > 0 &&
3325             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3326                 return false;
3327
3328         if (info->flags & RATE_INFO_FLAGS_MCS) {
3329                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3330                         return false;
3331                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3332                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3333                         return false;
3334                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3335                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3336                         return false;
3337         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3338                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3339                         return false;
3340                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3341                         return false;
3342                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3343                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3344                         return false;
3345                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3346                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3347                         return false;
3348                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3349                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3350                         return false;
3351                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3352                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3353                         return false;
3354                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3355                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3356                         return false;
3357         }
3358
3359         nla_nest_end(msg, rate);
3360         return true;
3361 }
3362
3363 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3364                                int id)
3365 {
3366         void *attr;
3367         int i = 0;
3368
3369         if (!mask)
3370                 return true;
3371
3372         attr = nla_nest_start(msg, id);
3373         if (!attr)
3374                 return false;
3375
3376         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3377                 if (!(mask & BIT(i)))
3378                         continue;
3379
3380                 if (nla_put_u8(msg, i, signal[i]))
3381                         return false;
3382         }
3383
3384         nla_nest_end(msg, attr);
3385
3386         return true;
3387 }
3388
3389 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3390                                 int flags,
3391                                 struct cfg80211_registered_device *rdev,
3392                                 struct net_device *dev,
3393                                 const u8 *mac_addr, struct station_info *sinfo)
3394 {
3395         void *hdr;
3396         struct nlattr *sinfoattr, *bss_param;
3397
3398         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3399         if (!hdr)
3400                 return -1;
3401
3402         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3403             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3404             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3405                 goto nla_put_failure;
3406
3407         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3408         if (!sinfoattr)
3409                 goto nla_put_failure;
3410         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3411             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3412                         sinfo->connected_time))
3413                 goto nla_put_failure;
3414         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3415             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3416                         sinfo->inactive_time))
3417                 goto nla_put_failure;
3418         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3419                               STATION_INFO_RX_BYTES64)) &&
3420             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3421                         (u32)sinfo->rx_bytes))
3422                 goto nla_put_failure;
3423         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3424                               STATION_INFO_TX_BYTES64)) &&
3425             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3426                         (u32)sinfo->tx_bytes))
3427                 goto nla_put_failure;
3428         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3429             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3430                         sinfo->rx_bytes))
3431                 goto nla_put_failure;
3432         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3433             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3434                         sinfo->tx_bytes))
3435                 goto nla_put_failure;
3436         if ((sinfo->filled & STATION_INFO_LLID) &&
3437             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3438                 goto nla_put_failure;
3439         if ((sinfo->filled & STATION_INFO_PLID) &&
3440             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3441                 goto nla_put_failure;
3442         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3443             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3444                        sinfo->plink_state))
3445                 goto nla_put_failure;
3446         switch (rdev->wiphy.signal_type) {
3447         case CFG80211_SIGNAL_TYPE_MBM:
3448                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3449                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3450                                sinfo->signal))
3451                         goto nla_put_failure;
3452                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3453                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3454                                sinfo->signal_avg))
3455                         goto nla_put_failure;
3456                 break;
3457         default:
3458                 break;
3459         }
3460         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3461                 if (!nl80211_put_signal(msg, sinfo->chains,
3462                                         sinfo->chain_signal,
3463                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3464                         goto nla_put_failure;
3465         }
3466         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3467                 if (!nl80211_put_signal(msg, sinfo->chains,
3468                                         sinfo->chain_signal_avg,
3469                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3470                         goto nla_put_failure;
3471         }
3472         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3473                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3474                                           NL80211_STA_INFO_TX_BITRATE))
3475                         goto nla_put_failure;
3476         }
3477         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3478                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3479                                           NL80211_STA_INFO_RX_BITRATE))
3480                         goto nla_put_failure;
3481         }
3482         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3483             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3484                         sinfo->rx_packets))
3485                 goto nla_put_failure;
3486         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3487             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3488                         sinfo->tx_packets))
3489                 goto nla_put_failure;
3490         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3491             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3492                         sinfo->tx_retries))
3493                 goto nla_put_failure;
3494         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3495             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3496                         sinfo->tx_failed))
3497                 goto nla_put_failure;
3498         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3499             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3500                         sinfo->beacon_loss_count))
3501                 goto nla_put_failure;
3502         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3503             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3504                         sinfo->local_pm))
3505                 goto nla_put_failure;
3506         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3507             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3508                         sinfo->peer_pm))
3509                 goto nla_put_failure;
3510         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3511             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3512                         sinfo->nonpeer_pm))
3513                 goto nla_put_failure;
3514         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3515                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3516                 if (!bss_param)
3517                         goto nla_put_failure;
3518
3519                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3520                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3521                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3522                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3523                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3524                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3525                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3526                                sinfo->bss_param.dtim_period) ||
3527                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3528                                 sinfo->bss_param.beacon_interval))
3529                         goto nla_put_failure;
3530
3531                 nla_nest_end(msg, bss_param);
3532         }
3533         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3534             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3535                     sizeof(struct nl80211_sta_flag_update),
3536                     &sinfo->sta_flags))
3537                 goto nla_put_failure;
3538         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3539                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3540                             sinfo->t_offset))
3541                 goto nla_put_failure;
3542         nla_nest_end(msg, sinfoattr);
3543
3544         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3545             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3546                     sinfo->assoc_req_ies))
3547                 goto nla_put_failure;
3548
3549         return genlmsg_end(msg, hdr);
3550
3551  nla_put_failure:
3552         genlmsg_cancel(msg, hdr);
3553         return -EMSGSIZE;
3554 }
3555
3556 static int nl80211_dump_station(struct sk_buff *skb,
3557                                 struct netlink_callback *cb)
3558 {
3559         struct station_info sinfo;
3560         struct cfg80211_registered_device *dev;
3561         struct wireless_dev *wdev;
3562         u8 mac_addr[ETH_ALEN];
3563         int sta_idx = cb->args[2];
3564         int err;
3565
3566         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3567         if (err)
3568                 return err;
3569
3570         if (!wdev->netdev) {
3571                 err = -EINVAL;
3572                 goto out_err;
3573         }
3574
3575         if (!dev->ops->dump_station) {
3576                 err = -EOPNOTSUPP;
3577                 goto out_err;
3578         }
3579
3580         while (1) {
3581                 memset(&sinfo, 0, sizeof(sinfo));
3582                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3583                                         mac_addr, &sinfo);
3584                 if (err == -ENOENT)
3585                         break;
3586                 if (err)
3587                         goto out_err;
3588
3589                 if (nl80211_send_station(skb,
3590                                 NETLINK_CB(cb->skb).portid,
3591                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3592                                 dev, wdev->netdev, mac_addr,
3593                                 &sinfo) < 0)
3594                         goto out;
3595
3596                 sta_idx++;
3597         }
3598
3599
3600  out:
3601         cb->args[2] = sta_idx;
3602         err = skb->len;
3603  out_err:
3604         nl80211_finish_wdev_dump(dev);
3605
3606         return err;
3607 }
3608
3609 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3610 {
3611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3612         struct net_device *dev = info->user_ptr[1];
3613         struct station_info sinfo;
3614         struct sk_buff *msg;
3615         u8 *mac_addr = NULL;
3616         int err;
3617
3618         memset(&sinfo, 0, sizeof(sinfo));
3619
3620         if (!info->attrs[NL80211_ATTR_MAC])
3621                 return -EINVAL;
3622
3623         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3624
3625         if (!rdev->ops->get_station)
3626                 return -EOPNOTSUPP;
3627
3628         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3629         if (err)
3630                 return err;
3631
3632         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3633         if (!msg)
3634                 return -ENOMEM;
3635
3636         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3637                                  rdev, dev, mac_addr, &sinfo) < 0) {
3638                 nlmsg_free(msg);
3639                 return -ENOBUFS;
3640         }
3641
3642         return genlmsg_reply(msg, info);
3643 }
3644
3645 int cfg80211_check_station_change(struct wiphy *wiphy,
3646                                   struct station_parameters *params,
3647                                   enum cfg80211_station_type statype)
3648 {
3649         if (params->listen_interval != -1)
3650                 return -EINVAL;
3651         if (params->aid)
3652                 return -EINVAL;
3653
3654         /* When you run into this, adjust the code below for the new flag */
3655         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3656
3657         switch (statype) {
3658         case CFG80211_STA_MESH_PEER_KERNEL:
3659         case CFG80211_STA_MESH_PEER_USER:
3660                 /*
3661                  * No ignoring the TDLS flag here -- the userspace mesh
3662                  * code doesn't have the bug of including TDLS in the
3663                  * mask everywhere.
3664                  */
3665                 if (params->sta_flags_mask &
3666                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3667                                   BIT(NL80211_STA_FLAG_MFP) |
3668                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3669                         return -EINVAL;
3670                 break;
3671         case CFG80211_STA_TDLS_PEER_SETUP:
3672         case CFG80211_STA_TDLS_PEER_ACTIVE:
3673                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3674                         return -EINVAL;
3675                 /* ignore since it can't change */
3676                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3677                 break;
3678         default:
3679                 /* disallow mesh-specific things */
3680                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3681                         return -EINVAL;
3682                 if (params->local_pm)
3683                         return -EINVAL;
3684                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3685                         return -EINVAL;
3686         }
3687
3688         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3689             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3690                 /* TDLS can't be set, ... */
3691                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3692                         return -EINVAL;
3693                 /*
3694                  * ... but don't bother the driver with it. This works around
3695                  * a hostapd/wpa_supplicant issue -- it always includes the
3696                  * TLDS_PEER flag in the mask even for AP mode.
3697                  */
3698                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3699         }
3700
3701         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3702                 /* reject other things that can't change */
3703                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3704                         return -EINVAL;
3705                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3706                         return -EINVAL;
3707                 if (params->supported_rates)
3708                         return -EINVAL;
3709                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3710                         return -EINVAL;
3711         }
3712
3713         if (statype != CFG80211_STA_AP_CLIENT) {
3714                 if (params->vlan)
3715                         return -EINVAL;
3716         }
3717
3718         switch (statype) {
3719         case CFG80211_STA_AP_MLME_CLIENT:
3720                 /* Use this only for authorizing/unauthorizing a station */
3721                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3722                         return -EOPNOTSUPP;
3723                 break;
3724         case CFG80211_STA_AP_CLIENT:
3725                 /* accept only the listed bits */
3726                 if (params->sta_flags_mask &
3727                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3728                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3729                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3730                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3731                                   BIT(NL80211_STA_FLAG_WME) |
3732                                   BIT(NL80211_STA_FLAG_MFP)))
3733                         return -EINVAL;
3734
3735                 /* but authenticated/associated only if driver handles it */
3736                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3737                     params->sta_flags_mask &
3738                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3739                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3740                         return -EINVAL;
3741                 break;
3742         case CFG80211_STA_IBSS:
3743         case CFG80211_STA_AP_STA:
3744                 /* reject any changes other than AUTHORIZED */
3745                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3746                         return -EINVAL;
3747                 break;
3748         case CFG80211_STA_TDLS_PEER_SETUP:
3749                 /* reject any changes other than AUTHORIZED or WME */
3750                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3751                                                BIT(NL80211_STA_FLAG_WME)))
3752                         return -EINVAL;
3753                 /* force (at least) rates when authorizing */
3754                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3755                     !params->supported_rates)
3756                         return -EINVAL;
3757                 break;
3758         case CFG80211_STA_TDLS_PEER_ACTIVE:
3759                 /* reject any changes */
3760                 return -EINVAL;
3761         case CFG80211_STA_MESH_PEER_KERNEL:
3762                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3763                         return -EINVAL;
3764                 break;
3765         case CFG80211_STA_MESH_PEER_USER:
3766                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3767                         return -EINVAL;
3768                 break;
3769         }
3770
3771         return 0;
3772 }
3773 EXPORT_SYMBOL(cfg80211_check_station_change);
3774
3775 /*
3776  * Get vlan interface making sure it is running and on the right wiphy.
3777  */
3778 static struct net_device *get_vlan(struct genl_info *info,
3779                                    struct cfg80211_registered_device *rdev)
3780 {
3781         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3782         struct net_device *v;
3783         int ret;
3784
3785         if (!vlanattr)
3786                 return NULL;
3787
3788         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3789         if (!v)
3790                 return ERR_PTR(-ENODEV);
3791
3792         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3793                 ret = -EINVAL;
3794                 goto error;
3795         }
3796
3797         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3798             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3799             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3800                 ret = -EINVAL;
3801                 goto error;
3802         }
3803
3804         if (!netif_running(v)) {
3805                 ret = -ENETDOWN;
3806                 goto error;
3807         }
3808
3809         return v;
3810  error:
3811         dev_put(v);
3812         return ERR_PTR(ret);
3813 }
3814
3815 static struct nla_policy
3816 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3817         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3818         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3819 };
3820
3821 static int nl80211_parse_sta_wme(struct genl_info *info,
3822                                  struct station_parameters *params)
3823 {
3824         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3825         struct nlattr *nla;
3826         int err;
3827
3828         /* parse WME attributes if present */
3829         if (!info->attrs[NL80211_ATTR_STA_WME])
3830                 return 0;
3831
3832         nla = info->attrs[NL80211_ATTR_STA_WME];
3833         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3834                                nl80211_sta_wme_policy);
3835         if (err)
3836                 return err;
3837
3838         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3839                 params->uapsd_queues = nla_get_u8(
3840                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3841         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3842                 return -EINVAL;
3843
3844         if (tb[NL80211_STA_WME_MAX_SP])
3845                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3846
3847         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3848                 return -EINVAL;
3849
3850         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3851
3852         return 0;
3853 }
3854
3855 static int nl80211_set_station_tdls(struct genl_info *info,
3856                                     struct station_parameters *params)
3857 {
3858         /* Dummy STA entry gets updated once the peer capabilities are known */
3859         if (info->attrs[NL80211_ATTR_PEER_AID])
3860                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3861         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3862                 params->ht_capa =
3863                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3864         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3865                 params->vht_capa =
3866                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3867
3868         return nl80211_parse_sta_wme(info, params);
3869 }
3870
3871 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3872 {
3873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3874         struct net_device *dev = info->user_ptr[1];
3875         struct station_parameters params;
3876         u8 *mac_addr;
3877         int err;
3878
3879         memset(&params, 0, sizeof(params));
3880
3881         params.listen_interval = -1;
3882
3883         if (!rdev->ops->change_station)
3884                 return -EOPNOTSUPP;
3885
3886         if (info->attrs[NL80211_ATTR_STA_AID])
3887                 return -EINVAL;
3888
3889         if (!info->attrs[NL80211_ATTR_MAC])
3890                 return -EINVAL;
3891
3892         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3893
3894         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3895                 params.supported_rates =
3896                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3897                 params.supported_rates_len =
3898                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3899         }
3900
3901         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3902                 params.capability =
3903                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3904                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3905         }
3906
3907         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3908                 params.ext_capab =
3909                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3910                 params.ext_capab_len =
3911                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3912         }
3913
3914         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3915                 return -EINVAL;
3916
3917         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3918                 return -EINVAL;
3919
3920         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3921                 params.plink_action =
3922                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3923                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3924                         return -EINVAL;
3925         }
3926
3927         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3928                 params.plink_state =
3929                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3930                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3931                         return -EINVAL;
3932                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3933         }
3934
3935         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3936                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3937                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3938
3939                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3940                     pm > NL80211_MESH_POWER_MAX)
3941                         return -EINVAL;
3942
3943                 params.local_pm = pm;
3944         }
3945
3946         /* Include parameters for TDLS peer (will check later) */
3947         err = nl80211_set_station_tdls(info, &params);
3948         if (err)
3949                 return err;
3950
3951         params.vlan = get_vlan(info, rdev);
3952         if (IS_ERR(params.vlan))
3953                 return PTR_ERR(params.vlan);
3954
3955         switch (dev->ieee80211_ptr->iftype) {
3956         case NL80211_IFTYPE_AP:
3957         case NL80211_IFTYPE_AP_VLAN:
3958         case NL80211_IFTYPE_P2P_GO:
3959         case NL80211_IFTYPE_P2P_CLIENT:
3960         case NL80211_IFTYPE_STATION:
3961         case NL80211_IFTYPE_ADHOC:
3962         case NL80211_IFTYPE_MESH_POINT:
3963                 break;
3964         default:
3965                 err = -EOPNOTSUPP;
3966                 goto out_put_vlan;
3967         }
3968
3969         /* driver will call cfg80211_check_station_change() */
3970         err = rdev_change_station(rdev, dev, mac_addr, &params);
3971
3972  out_put_vlan:
3973         if (params.vlan)
3974                 dev_put(params.vlan);
3975
3976         return err;
3977 }
3978
3979 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3980 {
3981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3982         int err;
3983         struct net_device *dev = info->user_ptr[1];
3984         struct station_parameters params;
3985         u8 *mac_addr = NULL;
3986
3987         memset(&params, 0, sizeof(params));
3988
3989         if (!rdev->ops->add_station)
3990                 return -EOPNOTSUPP;
3991
3992         if (!info->attrs[NL80211_ATTR_MAC])
3993                 return -EINVAL;
3994
3995         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3996                 return -EINVAL;
3997
3998         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3999                 return -EINVAL;
4000
4001         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4002             !info->attrs[NL80211_ATTR_PEER_AID])
4003                 return -EINVAL;
4004
4005         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4006         params.supported_rates =
4007                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4008         params.supported_rates_len =
4009                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4010         params.listen_interval =
4011                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4012
4013         if (info->attrs[NL80211_ATTR_PEER_AID])
4014                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4015         else
4016                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4017         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4018                 return -EINVAL;
4019
4020         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4021                 params.capability =
4022                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4023                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4024         }
4025
4026         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4027                 params.ext_capab =
4028                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4029                 params.ext_capab_len =
4030                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4031         }
4032
4033         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4034                 params.ht_capa =
4035                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4036
4037         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4038                 params.vht_capa =
4039                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4040
4041         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4042                 params.plink_action =
4043                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4044                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4045                         return -EINVAL;
4046         }
4047
4048         err = nl80211_parse_sta_wme(info, &params);
4049         if (err)
4050                 return err;
4051
4052         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4053                 return -EINVAL;
4054
4055         /* When you run into this, adjust the code below for the new flag */
4056         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4057
4058         switch (dev->ieee80211_ptr->iftype) {
4059         case NL80211_IFTYPE_AP:
4060         case NL80211_IFTYPE_AP_VLAN:
4061         case NL80211_IFTYPE_P2P_GO:
4062                 /* ignore WME attributes if iface/sta is not capable */
4063                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4064                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4065                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4066
4067                 /* TDLS peers cannot be added */
4068                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4069                     info->attrs[NL80211_ATTR_PEER_AID])
4070                         return -EINVAL;
4071                 /* but don't bother the driver with it */
4072                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4073
4074                 /* allow authenticated/associated only if driver handles it */
4075                 if (!(rdev->wiphy.features &
4076                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4077                     params.sta_flags_mask &
4078                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4079                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4080                         return -EINVAL;
4081
4082                 /* must be last in here for error handling */
4083                 params.vlan = get_vlan(info, rdev);
4084                 if (IS_ERR(params.vlan))
4085                         return PTR_ERR(params.vlan);
4086                 break;
4087         case NL80211_IFTYPE_MESH_POINT:
4088                 /* ignore uAPSD data */
4089                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4090
4091                 /* associated is disallowed */
4092                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4093                         return -EINVAL;
4094                 /* TDLS peers cannot be added */
4095                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4096                     info->attrs[NL80211_ATTR_PEER_AID])
4097                         return -EINVAL;
4098                 break;
4099         case NL80211_IFTYPE_STATION:
4100         case NL80211_IFTYPE_P2P_CLIENT:
4101                 /* ignore uAPSD data */
4102                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4103
4104                 /* these are disallowed */
4105                 if (params.sta_flags_mask &
4106                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4107                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4108                         return -EINVAL;
4109                 /* Only TDLS peers can be added */
4110                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4111                         return -EINVAL;
4112                 /* Can only add if TDLS ... */
4113                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4114                         return -EOPNOTSUPP;
4115                 /* ... with external setup is supported */
4116                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4117                         return -EOPNOTSUPP;
4118                 /*
4119                  * Older wpa_supplicant versions always mark the TDLS peer
4120                  * as authorized, but it shouldn't yet be.
4121                  */
4122                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4123                 break;
4124         default:
4125                 return -EOPNOTSUPP;
4126         }
4127
4128         /* be aware of params.vlan when changing code here */
4129
4130         err = rdev_add_station(rdev, dev, mac_addr, &params);
4131
4132         if (params.vlan)
4133                 dev_put(params.vlan);
4134         return err;
4135 }
4136
4137 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4138 {
4139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4140         struct net_device *dev = info->user_ptr[1];
4141         u8 *mac_addr = NULL;
4142
4143         if (info->attrs[NL80211_ATTR_MAC])
4144                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4145
4146         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4147             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4148             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4149             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4150                 return -EINVAL;
4151
4152         if (!rdev->ops->del_station)
4153                 return -EOPNOTSUPP;
4154
4155         return rdev_del_station(rdev, dev, mac_addr);
4156 }
4157
4158 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4159                                 int flags, struct net_device *dev,
4160                                 u8 *dst, u8 *next_hop,
4161                                 struct mpath_info *pinfo)
4162 {
4163         void *hdr;
4164         struct nlattr *pinfoattr;
4165
4166         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4167         if (!hdr)
4168                 return -1;
4169
4170         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4171             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4172             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4173             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4174                 goto nla_put_failure;
4175
4176         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4177         if (!pinfoattr)
4178                 goto nla_put_failure;
4179         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4180             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4181                         pinfo->frame_qlen))
4182                 goto nla_put_failure;
4183         if (((pinfo->filled & MPATH_INFO_SN) &&
4184              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4185             ((pinfo->filled & MPATH_INFO_METRIC) &&
4186              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4187                          pinfo->metric)) ||
4188             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4189              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4190                          pinfo->exptime)) ||
4191             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4192              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4193                         pinfo->flags)) ||
4194             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4195              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4196                          pinfo->discovery_timeout)) ||
4197             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4198              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4199                         pinfo->discovery_retries)))
4200                 goto nla_put_failure;
4201
4202         nla_nest_end(msg, pinfoattr);
4203
4204         return genlmsg_end(msg, hdr);
4205
4206  nla_put_failure:
4207         genlmsg_cancel(msg, hdr);
4208         return -EMSGSIZE;
4209 }
4210
4211 static int nl80211_dump_mpath(struct sk_buff *skb,
4212                               struct netlink_callback *cb)
4213 {
4214         struct mpath_info pinfo;
4215         struct cfg80211_registered_device *dev;
4216         struct wireless_dev *wdev;
4217         u8 dst[ETH_ALEN];
4218         u8 next_hop[ETH_ALEN];
4219         int path_idx = cb->args[2];
4220         int err;
4221
4222         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4223         if (err)
4224                 return err;
4225
4226         if (!dev->ops->dump_mpath) {
4227                 err = -EOPNOTSUPP;
4228                 goto out_err;
4229         }
4230
4231         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4232                 err = -EOPNOTSUPP;
4233                 goto out_err;
4234         }
4235
4236         while (1) {
4237                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4238                                       next_hop, &pinfo);
4239                 if (err == -ENOENT)
4240                         break;
4241                 if (err)
4242                         goto out_err;
4243
4244                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4245                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4246                                        wdev->netdev, dst, next_hop,
4247                                        &pinfo) < 0)
4248                         goto out;
4249
4250                 path_idx++;
4251         }
4252
4253
4254  out:
4255         cb->args[2] = path_idx;
4256         err = skb->len;
4257  out_err:
4258         nl80211_finish_wdev_dump(dev);
4259         return err;
4260 }
4261
4262 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4263 {
4264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4265         int err;
4266         struct net_device *dev = info->user_ptr[1];
4267         struct mpath_info pinfo;
4268         struct sk_buff *msg;
4269         u8 *dst = NULL;
4270         u8 next_hop[ETH_ALEN];
4271
4272         memset(&pinfo, 0, sizeof(pinfo));
4273
4274         if (!info->attrs[NL80211_ATTR_MAC])
4275                 return -EINVAL;
4276
4277         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4278
4279         if (!rdev->ops->get_mpath)
4280                 return -EOPNOTSUPP;
4281
4282         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4283                 return -EOPNOTSUPP;
4284
4285         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4286         if (err)
4287                 return err;
4288
4289         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4290         if (!msg)
4291                 return -ENOMEM;
4292
4293         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4294                                  dev, dst, next_hop, &pinfo) < 0) {
4295                 nlmsg_free(msg);
4296                 return -ENOBUFS;
4297         }
4298
4299         return genlmsg_reply(msg, info);
4300 }
4301
4302 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4303 {
4304         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4305         struct net_device *dev = info->user_ptr[1];
4306         u8 *dst = NULL;
4307         u8 *next_hop = NULL;
4308
4309         if (!info->attrs[NL80211_ATTR_MAC])
4310                 return -EINVAL;
4311
4312         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4313                 return -EINVAL;
4314
4315         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4316         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4317
4318         if (!rdev->ops->change_mpath)
4319                 return -EOPNOTSUPP;
4320
4321         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4322                 return -EOPNOTSUPP;
4323
4324         return rdev_change_mpath(rdev, dev, dst, next_hop);
4325 }
4326
4327 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4328 {
4329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4330         struct net_device *dev = info->user_ptr[1];
4331         u8 *dst = NULL;
4332         u8 *next_hop = NULL;
4333
4334         if (!info->attrs[NL80211_ATTR_MAC])
4335                 return -EINVAL;
4336
4337         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4338                 return -EINVAL;
4339
4340         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4341         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4342
4343         if (!rdev->ops->add_mpath)
4344                 return -EOPNOTSUPP;
4345
4346         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4347                 return -EOPNOTSUPP;
4348
4349         return rdev_add_mpath(rdev, dev, dst, next_hop);
4350 }
4351
4352 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4353 {
4354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4355         struct net_device *dev = info->user_ptr[1];
4356         u8 *dst = NULL;
4357
4358         if (info->attrs[NL80211_ATTR_MAC])
4359                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4360
4361         if (!rdev->ops->del_mpath)
4362                 return -EOPNOTSUPP;
4363
4364         return rdev_del_mpath(rdev, dev, dst);
4365 }
4366
4367 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4368 {
4369         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4370         struct net_device *dev = info->user_ptr[1];
4371         struct bss_parameters params;
4372
4373         memset(&params, 0, sizeof(params));
4374         /* default to not changing parameters */
4375         params.use_cts_prot = -1;
4376         params.use_short_preamble = -1;
4377         params.use_short_slot_time = -1;
4378         params.ap_isolate = -1;
4379         params.ht_opmode = -1;
4380         params.p2p_ctwindow = -1;
4381         params.p2p_opp_ps = -1;
4382
4383         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4384                 params.use_cts_prot =
4385                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4386         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4387                 params.use_short_preamble =
4388                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4389         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4390                 params.use_short_slot_time =
4391                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4392         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4393                 params.basic_rates =
4394                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4395                 params.basic_rates_len =
4396                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4397         }
4398         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4399                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4400         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4401                 params.ht_opmode =
4402                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4403
4404         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4405                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4406                         return -EINVAL;
4407                 params.p2p_ctwindow =
4408                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4409                 if (params.p2p_ctwindow < 0)
4410                         return -EINVAL;
4411                 if (params.p2p_ctwindow != 0 &&
4412                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4413                         return -EINVAL;
4414         }
4415
4416         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4417                 u8 tmp;
4418
4419                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4420                         return -EINVAL;
4421                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4422                 if (tmp > 1)
4423                         return -EINVAL;
4424                 params.p2p_opp_ps = tmp;
4425                 if (params.p2p_opp_ps &&
4426                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4427                         return -EINVAL;
4428         }
4429
4430         if (!rdev->ops->change_bss)
4431                 return -EOPNOTSUPP;
4432
4433         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4434             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4435                 return -EOPNOTSUPP;
4436
4437         return rdev_change_bss(rdev, dev, &params);
4438 }
4439
4440 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4441         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4442         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4443         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4444         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4445         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4446         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4447 };
4448
4449 static int parse_reg_rule(struct nlattr *tb[],
4450         struct ieee80211_reg_rule *reg_rule)
4451 {
4452         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4453         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4454
4455         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4456                 return -EINVAL;
4457         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4458                 return -EINVAL;
4459         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4460                 return -EINVAL;
4461         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4462                 return -EINVAL;
4463         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4464                 return -EINVAL;
4465
4466         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4467
4468         freq_range->start_freq_khz =
4469                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4470         freq_range->end_freq_khz =
4471                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4472         freq_range->max_bandwidth_khz =
4473                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4474
4475         power_rule->max_eirp =
4476                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4477
4478         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4479                 power_rule->max_antenna_gain =
4480                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4481
4482         return 0;
4483 }
4484
4485 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4486 {
4487         int r;
4488         char *data = NULL;
4489         enum nl80211_user_reg_hint_type user_reg_hint_type;
4490
4491         /*
4492          * You should only get this when cfg80211 hasn't yet initialized
4493          * completely when built-in to the kernel right between the time
4494          * window between nl80211_init() and regulatory_init(), if that is
4495          * even possible.
4496          */
4497         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4498                 return -EINPROGRESS;
4499
4500         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4501                 return -EINVAL;
4502
4503         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4504
4505         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4506                 user_reg_hint_type =
4507                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4508         else
4509                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4510
4511         switch (user_reg_hint_type) {
4512         case NL80211_USER_REG_HINT_USER:
4513         case NL80211_USER_REG_HINT_CELL_BASE:
4514                 break;
4515         default:
4516                 return -EINVAL;
4517         }
4518
4519         r = regulatory_hint_user(data, user_reg_hint_type);
4520
4521         return r;
4522 }
4523
4524 static int nl80211_get_mesh_config(struct sk_buff *skb,
4525                                    struct genl_info *info)
4526 {
4527         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4528         struct net_device *dev = info->user_ptr[1];
4529         struct wireless_dev *wdev = dev->ieee80211_ptr;
4530         struct mesh_config cur_params;
4531         int err = 0;
4532         void *hdr;
4533         struct nlattr *pinfoattr;
4534         struct sk_buff *msg;
4535
4536         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4537                 return -EOPNOTSUPP;
4538
4539         if (!rdev->ops->get_mesh_config)
4540                 return -EOPNOTSUPP;
4541
4542         wdev_lock(wdev);
4543         /* If not connected, get default parameters */
4544         if (!wdev->mesh_id_len)
4545                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4546         else
4547                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4548         wdev_unlock(wdev);
4549
4550         if (err)
4551                 return err;
4552
4553         /* Draw up a netlink message to send back */
4554         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4555         if (!msg)
4556                 return -ENOMEM;
4557         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4558                              NL80211_CMD_GET_MESH_CONFIG);
4559         if (!hdr)
4560                 goto out;
4561         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4562         if (!pinfoattr)
4563                 goto nla_put_failure;
4564         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4565             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4566                         cur_params.dot11MeshRetryTimeout) ||
4567             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4568                         cur_params.dot11MeshConfirmTimeout) ||
4569             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4570                         cur_params.dot11MeshHoldingTimeout) ||
4571             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4572                         cur_params.dot11MeshMaxPeerLinks) ||
4573             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4574                        cur_params.dot11MeshMaxRetries) ||
4575             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4576                        cur_params.dot11MeshTTL) ||
4577             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4578                        cur_params.element_ttl) ||
4579             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4580                        cur_params.auto_open_plinks) ||
4581             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4582                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4583             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4584                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4585             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4586                         cur_params.path_refresh_time) ||
4587             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4588                         cur_params.min_discovery_timeout) ||
4589             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4590                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4591             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4592                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4593             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4594                         cur_params.dot11MeshHWMPperrMinInterval) ||
4595             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4596                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4597             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4598                        cur_params.dot11MeshHWMPRootMode) ||
4599             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4600                         cur_params.dot11MeshHWMPRannInterval) ||
4601             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4602                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4603             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4604                        cur_params.dot11MeshForwarding) ||
4605             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4606                         cur_params.rssi_threshold) ||
4607             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4608                         cur_params.ht_opmode) ||
4609             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4610                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4611             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4612                         cur_params.dot11MeshHWMProotInterval) ||
4613             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4614                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4615             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4616                         cur_params.power_mode) ||
4617             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4618                         cur_params.dot11MeshAwakeWindowDuration) ||
4619             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4620                         cur_params.plink_timeout))
4621                 goto nla_put_failure;
4622         nla_nest_end(msg, pinfoattr);
4623         genlmsg_end(msg, hdr);
4624         return genlmsg_reply(msg, info);
4625
4626  nla_put_failure:
4627         genlmsg_cancel(msg, hdr);
4628  out:
4629         nlmsg_free(msg);
4630         return -ENOBUFS;
4631 }
4632
4633 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4634         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4635         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4636         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4637         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4638         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4639         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4640         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4641         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4642         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4643         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4644         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4645         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4646         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4647         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4648         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4649         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4650         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4651         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4652         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4653         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4654         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4655         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4656         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4657         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4658         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4659         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4660         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4661         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4662 };
4663
4664 static const struct nla_policy
4665         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4666         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4667         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4668         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4669         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4670         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4671         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4672         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4673                                     .len = IEEE80211_MAX_DATA_LEN },
4674         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4675 };
4676
4677 static int nl80211_parse_mesh_config(struct genl_info *info,
4678                                      struct mesh_config *cfg,
4679                                      u32 *mask_out)
4680 {
4681         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4682         u32 mask = 0;
4683
4684 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4685 do {                                                                        \
4686         if (tb[attr]) {                                                     \
4687                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4688                         return -EINVAL;                                     \
4689                 cfg->param = fn(tb[attr]);                                  \
4690                 mask |= (1 << (attr - 1));                                  \
4691         }                                                                   \
4692 } while (0)
4693
4694
4695         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4696                 return -EINVAL;
4697         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4698                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4699                              nl80211_meshconf_params_policy))
4700                 return -EINVAL;
4701
4702         /* This makes sure that there aren't more than 32 mesh config
4703          * parameters (otherwise our bitfield scheme would not work.) */
4704         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4705
4706         /* Fill in the params struct */
4707         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4708                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4709                                   nla_get_u16);
4710         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4711                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4712                                   nla_get_u16);
4713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4714                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4715                                   nla_get_u16);
4716         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4717                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4718                                   nla_get_u16);
4719         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4720                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4721                                   nla_get_u8);
4722         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4723                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4725                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4726                                   nla_get_u8);
4727         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4728                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4729                                   nla_get_u8);
4730         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4731                                   1, 255, mask,
4732                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4733                                   nla_get_u32);
4734         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4735                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4736                                   nla_get_u8);
4737         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4738                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4739                                   nla_get_u32);
4740         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4741                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4742                                   nla_get_u16);
4743         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4744                                   1, 65535, mask,
4745                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4746                                   nla_get_u32);
4747         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4748                                   1, 65535, mask,
4749                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4750                                   nla_get_u16);
4751         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4752                                   1, 65535, mask,
4753                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4754                                   nla_get_u16);
4755         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4756                                   dot11MeshHWMPnetDiameterTraversalTime,
4757                                   1, 65535, mask,
4758                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4759                                   nla_get_u16);
4760         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4761                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4762                                   nla_get_u8);
4763         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4764                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4765                                   nla_get_u16);
4766         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4767                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4768                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4769                                   nla_get_u8);
4770         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4771                                   mask, NL80211_MESHCONF_FORWARDING,
4772                                   nla_get_u8);
4773         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4774                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4775                                   nla_get_s32);
4776         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4777                                   mask, NL80211_MESHCONF_HT_OPMODE,
4778                                   nla_get_u16);
4779         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4780                                   1, 65535, mask,
4781                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4782                                   nla_get_u32);
4783         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4784                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4785                                   nla_get_u16);
4786         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4787                                   dot11MeshHWMPconfirmationInterval,
4788                                   1, 65535, mask,
4789                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4790                                   nla_get_u16);
4791         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4792                                   NL80211_MESH_POWER_ACTIVE,
4793                                   NL80211_MESH_POWER_MAX,
4794                                   mask, NL80211_MESHCONF_POWER_MODE,
4795                                   nla_get_u32);
4796         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4797                                   0, 65535, mask,
4798                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4799         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4800                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4801                                   nla_get_u32);
4802         if (mask_out)
4803                 *mask_out = mask;
4804
4805         return 0;
4806
4807 #undef FILL_IN_MESH_PARAM_IF_SET
4808 }
4809
4810 static int nl80211_parse_mesh_setup(struct genl_info *info,
4811                                      struct mesh_setup *setup)
4812 {
4813         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4814         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4815
4816         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4817                 return -EINVAL;
4818         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4819                              info->attrs[NL80211_ATTR_MESH_SETUP],
4820                              nl80211_mesh_setup_params_policy))
4821                 return -EINVAL;
4822
4823         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4824                 setup->sync_method =
4825                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4826                  IEEE80211_SYNC_METHOD_VENDOR :
4827                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4828
4829         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4830                 setup->path_sel_proto =
4831                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4832                  IEEE80211_PATH_PROTOCOL_VENDOR :
4833                  IEEE80211_PATH_PROTOCOL_HWMP;
4834
4835         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4836                 setup->path_metric =
4837                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4838                  IEEE80211_PATH_METRIC_VENDOR :
4839                  IEEE80211_PATH_METRIC_AIRTIME;
4840
4841
4842         if (tb[NL80211_MESH_SETUP_IE]) {
4843                 struct nlattr *ieattr =
4844                         tb[NL80211_MESH_SETUP_IE];
4845                 if (!is_valid_ie_attr(ieattr))
4846                         return -EINVAL;
4847                 setup->ie = nla_data(ieattr);
4848                 setup->ie_len = nla_len(ieattr);
4849         }
4850         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4851             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4852                 return -EINVAL;
4853         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4854         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4855         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4856         if (setup->is_secure)
4857                 setup->user_mpm = true;
4858
4859         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4860                 if (!setup->user_mpm)
4861                         return -EINVAL;
4862                 setup->auth_id =
4863                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4864         }
4865
4866         return 0;
4867 }
4868
4869 static int nl80211_update_mesh_config(struct sk_buff *skb,
4870                                       struct genl_info *info)
4871 {
4872         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4873         struct net_device *dev = info->user_ptr[1];
4874         struct wireless_dev *wdev = dev->ieee80211_ptr;
4875         struct mesh_config cfg;
4876         u32 mask;
4877         int err;
4878
4879         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4880                 return -EOPNOTSUPP;
4881
4882         if (!rdev->ops->update_mesh_config)
4883                 return -EOPNOTSUPP;
4884
4885         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4886         if (err)
4887                 return err;
4888
4889         wdev_lock(wdev);
4890         if (!wdev->mesh_id_len)
4891                 err = -ENOLINK;
4892
4893         if (!err)
4894                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4895
4896         wdev_unlock(wdev);
4897
4898         return err;
4899 }
4900
4901 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4902 {
4903         const struct ieee80211_regdomain *regdom;
4904         struct sk_buff *msg;
4905         void *hdr = NULL;
4906         struct nlattr *nl_reg_rules;
4907         unsigned int i;
4908
4909         if (!cfg80211_regdomain)
4910                 return -EINVAL;
4911
4912         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4913         if (!msg)
4914                 return -ENOBUFS;
4915
4916         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4917                              NL80211_CMD_GET_REG);
4918         if (!hdr)
4919                 goto put_failure;
4920
4921         if (reg_last_request_cell_base() &&
4922             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4923                         NL80211_USER_REG_HINT_CELL_BASE))
4924                 goto nla_put_failure;
4925
4926         rcu_read_lock();
4927         regdom = rcu_dereference(cfg80211_regdomain);
4928
4929         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4930             (regdom->dfs_region &&
4931              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4932                 goto nla_put_failure_rcu;
4933
4934         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4935         if (!nl_reg_rules)
4936                 goto nla_put_failure_rcu;
4937
4938         for (i = 0; i < regdom->n_reg_rules; i++) {
4939                 struct nlattr *nl_reg_rule;
4940                 const struct ieee80211_reg_rule *reg_rule;
4941                 const struct ieee80211_freq_range *freq_range;
4942                 const struct ieee80211_power_rule *power_rule;
4943
4944                 reg_rule = &regdom->reg_rules[i];
4945                 freq_range = &reg_rule->freq_range;
4946                 power_rule = &reg_rule->power_rule;
4947
4948                 nl_reg_rule = nla_nest_start(msg, i);
4949                 if (!nl_reg_rule)
4950                         goto nla_put_failure_rcu;
4951
4952                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4953                                 reg_rule->flags) ||
4954                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4955                                 freq_range->start_freq_khz) ||
4956                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4957                                 freq_range->end_freq_khz) ||
4958                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4959                                 freq_range->max_bandwidth_khz) ||
4960                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4961                                 power_rule->max_antenna_gain) ||
4962                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4963                                 power_rule->max_eirp))
4964                         goto nla_put_failure_rcu;
4965
4966                 nla_nest_end(msg, nl_reg_rule);
4967         }
4968         rcu_read_unlock();
4969
4970         nla_nest_end(msg, nl_reg_rules);
4971
4972         genlmsg_end(msg, hdr);
4973         return genlmsg_reply(msg, info);
4974
4975 nla_put_failure_rcu:
4976         rcu_read_unlock();
4977 nla_put_failure:
4978         genlmsg_cancel(msg, hdr);
4979 put_failure:
4980         nlmsg_free(msg);
4981         return -EMSGSIZE;
4982 }
4983
4984 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4985 {
4986         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4987         struct nlattr *nl_reg_rule;
4988         char *alpha2 = NULL;
4989         int rem_reg_rules = 0, r = 0;
4990         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4991         u8 dfs_region = 0;
4992         struct ieee80211_regdomain *rd = NULL;
4993
4994         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4995                 return -EINVAL;
4996
4997         if (!info->attrs[NL80211_ATTR_REG_RULES])
4998                 return -EINVAL;
4999
5000         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5001
5002         if (info->attrs[NL80211_ATTR_DFS_REGION])
5003                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5004
5005         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5006                             rem_reg_rules) {
5007                 num_rules++;
5008                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5009                         return -EINVAL;
5010         }
5011
5012         size_of_regd = sizeof(struct ieee80211_regdomain) +
5013                        num_rules * sizeof(struct ieee80211_reg_rule);
5014
5015         rd = kzalloc(size_of_regd, GFP_KERNEL);
5016         if (!rd)
5017                 return -ENOMEM;
5018
5019         rd->n_reg_rules = num_rules;
5020         rd->alpha2[0] = alpha2[0];
5021         rd->alpha2[1] = alpha2[1];
5022
5023         /*
5024          * Disable DFS master mode if the DFS region was
5025          * not supported or known on this kernel.
5026          */
5027         if (reg_supported_dfs_region(dfs_region))
5028                 rd->dfs_region = dfs_region;
5029
5030         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5031                             rem_reg_rules) {
5032                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5033                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5034                           reg_rule_policy);
5035                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5036                 if (r)
5037                         goto bad_reg;
5038
5039                 rule_idx++;
5040
5041                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5042                         r = -EINVAL;
5043                         goto bad_reg;
5044                 }
5045         }
5046
5047         r = set_regdom(rd);
5048         /* set_regdom took ownership */
5049         rd = NULL;
5050
5051  bad_reg:
5052         kfree(rd);
5053         return r;
5054 }
5055
5056 static int validate_scan_freqs(struct nlattr *freqs)
5057 {
5058         struct nlattr *attr1, *attr2;
5059         int n_channels = 0, tmp1, tmp2;
5060
5061         nla_for_each_nested(attr1, freqs, tmp1) {
5062                 n_channels++;
5063                 /*
5064                  * Some hardware has a limited channel list for
5065                  * scanning, and it is pretty much nonsensical
5066                  * to scan for a channel twice, so disallow that
5067                  * and don't require drivers to check that the
5068                  * channel list they get isn't longer than what
5069                  * they can scan, as long as they can scan all
5070                  * the channels they registered at once.
5071                  */
5072                 nla_for_each_nested(attr2, freqs, tmp2)
5073                         if (attr1 != attr2 &&
5074                             nla_get_u32(attr1) == nla_get_u32(attr2))
5075                                 return 0;
5076         }
5077
5078         return n_channels;
5079 }
5080
5081 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5082 {
5083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5084         struct wireless_dev *wdev = info->user_ptr[1];
5085         struct cfg80211_scan_request *request;
5086         struct nlattr *attr;
5087         struct wiphy *wiphy;
5088         int err, tmp, n_ssids = 0, n_channels, i;
5089         size_t ie_len;
5090
5091         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5092                 return -EINVAL;
5093
5094         wiphy = &rdev->wiphy;
5095
5096         if (!rdev->ops->scan)
5097                 return -EOPNOTSUPP;
5098
5099         if (rdev->scan_req) {
5100                 err = -EBUSY;
5101                 goto unlock;
5102         }
5103
5104         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5105                 n_channels = validate_scan_freqs(
5106                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5107                 if (!n_channels) {
5108                         err = -EINVAL;
5109                         goto unlock;
5110                 }
5111         } else {
5112                 enum ieee80211_band band;
5113                 n_channels = 0;
5114
5115                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5116                         if (wiphy->bands[band])
5117                                 n_channels += wiphy->bands[band]->n_channels;
5118         }
5119
5120         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5121                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5122                         n_ssids++;
5123
5124         if (n_ssids > wiphy->max_scan_ssids) {
5125                 err = -EINVAL;
5126                 goto unlock;
5127         }
5128
5129         if (info->attrs[NL80211_ATTR_IE])
5130                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5131         else
5132                 ie_len = 0;
5133
5134         if (ie_len > wiphy->max_scan_ie_len) {
5135                 err = -EINVAL;
5136                 goto unlock;
5137         }
5138
5139         request = kzalloc(sizeof(*request)
5140                         + sizeof(*request->ssids) * n_ssids
5141                         + sizeof(*request->channels) * n_channels
5142                         + ie_len, GFP_KERNEL);
5143         if (!request) {
5144                 err = -ENOMEM;
5145                 goto unlock;
5146         }
5147
5148         if (n_ssids)
5149                 request->ssids = (void *)&request->channels[n_channels];
5150         request->n_ssids = n_ssids;
5151         if (ie_len) {
5152                 if (request->ssids)
5153                         request->ie = (void *)(request->ssids + n_ssids);
5154                 else
5155                         request->ie = (void *)(request->channels + n_channels);
5156         }
5157
5158         i = 0;
5159         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5160                 /* user specified, bail out if channel not found */
5161                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5162                         struct ieee80211_channel *chan;
5163
5164                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5165
5166                         if (!chan) {
5167                                 err = -EINVAL;
5168                                 goto out_free;
5169                         }
5170
5171                         /* ignore disabled channels */
5172                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5173                                 continue;
5174
5175                         request->channels[i] = chan;
5176                         i++;
5177                 }
5178         } else {
5179                 enum ieee80211_band band;
5180
5181                 /* all channels */
5182                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5183                         int j;
5184                         if (!wiphy->bands[band])
5185                                 continue;
5186                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5187                                 struct ieee80211_channel *chan;
5188
5189                                 chan = &wiphy->bands[band]->channels[j];
5190
5191                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5192                                         continue;
5193
5194                                 request->channels[i] = chan;
5195                                 i++;
5196                         }
5197                 }
5198         }
5199
5200         if (!i) {
5201                 err = -EINVAL;
5202                 goto out_free;
5203         }
5204
5205         request->n_channels = i;
5206
5207         i = 0;
5208         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5209                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5210                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5211                                 err = -EINVAL;
5212                                 goto out_free;
5213                         }
5214                         request->ssids[i].ssid_len = nla_len(attr);
5215                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5216                         i++;
5217                 }
5218         }
5219
5220         if (info->attrs[NL80211_ATTR_IE]) {
5221                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5222                 memcpy((void *)request->ie,
5223                        nla_data(info->attrs[NL80211_ATTR_IE]),
5224                        request->ie_len);
5225         }
5226
5227         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5228                 if (wiphy->bands[i])
5229                         request->rates[i] =
5230                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5231
5232         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5233                 nla_for_each_nested(attr,
5234                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5235                                     tmp) {
5236                         enum ieee80211_band band = nla_type(attr);
5237
5238                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5239                                 err = -EINVAL;
5240                                 goto out_free;
5241                         }
5242                         err = ieee80211_get_ratemask(wiphy->bands[band],
5243                                                      nla_data(attr),
5244                                                      nla_len(attr),
5245                                                      &request->rates[band]);
5246                         if (err)
5247                                 goto out_free;
5248                 }
5249         }
5250
5251         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5252                 request->flags = nla_get_u32(
5253                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5254                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5255                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5256                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5257                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5258                         err = -EOPNOTSUPP;
5259                         goto out_free;
5260                 }
5261         }
5262
5263         request->no_cck =
5264                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5265
5266         request->wdev = wdev;
5267         request->wiphy = &rdev->wiphy;
5268         request->scan_start = jiffies;
5269
5270         rdev->scan_req = request;
5271         err = rdev_scan(rdev, request);
5272
5273         if (!err) {
5274                 nl80211_send_scan_start(rdev, wdev);
5275                 if (wdev->netdev)
5276                         dev_hold(wdev->netdev);
5277         } else {
5278  out_free:
5279                 rdev->scan_req = NULL;
5280                 kfree(request);
5281         }
5282
5283  unlock:
5284         return err;
5285 }
5286
5287 static int nl80211_start_sched_scan(struct sk_buff *skb,
5288                                     struct genl_info *info)
5289 {
5290         struct cfg80211_sched_scan_request *request;
5291         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5292         struct net_device *dev = info->user_ptr[1];
5293         struct nlattr *attr;
5294         struct wiphy *wiphy;
5295         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5296         u32 interval;
5297         enum ieee80211_band band;
5298         size_t ie_len;
5299         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5300
5301         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5302             !rdev->ops->sched_scan_start)
5303                 return -EOPNOTSUPP;
5304
5305         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5306                 return -EINVAL;
5307
5308         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5309                 return -EINVAL;
5310
5311         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5312         if (interval == 0)
5313                 return -EINVAL;
5314
5315         wiphy = &rdev->wiphy;
5316
5317         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5318                 n_channels = validate_scan_freqs(
5319                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5320                 if (!n_channels)
5321                         return -EINVAL;
5322         } else {
5323                 n_channels = 0;
5324
5325                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5326                         if (wiphy->bands[band])
5327                                 n_channels += wiphy->bands[band]->n_channels;
5328         }
5329
5330         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5331                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5332                                     tmp)
5333                         n_ssids++;
5334
5335         if (n_ssids > wiphy->max_sched_scan_ssids)
5336                 return -EINVAL;
5337
5338         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5339                 nla_for_each_nested(attr,
5340                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5341                                     tmp)
5342                         n_match_sets++;
5343
5344         if (n_match_sets > wiphy->max_match_sets)
5345                 return -EINVAL;
5346
5347         if (info->attrs[NL80211_ATTR_IE])
5348                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5349         else
5350                 ie_len = 0;
5351
5352         if (ie_len > wiphy->max_sched_scan_ie_len)
5353                 return -EINVAL;
5354
5355         if (rdev->sched_scan_req) {
5356                 err = -EINPROGRESS;
5357                 goto out;
5358         }
5359
5360         request = kzalloc(sizeof(*request)
5361                         + sizeof(*request->ssids) * n_ssids
5362                         + sizeof(*request->match_sets) * n_match_sets
5363                         + sizeof(*request->channels) * n_channels
5364                         + ie_len, GFP_KERNEL);
5365         if (!request) {
5366                 err = -ENOMEM;
5367                 goto out;
5368         }
5369
5370         if (n_ssids)
5371                 request->ssids = (void *)&request->channels[n_channels];
5372         request->n_ssids = n_ssids;
5373         if (ie_len) {
5374                 if (request->ssids)
5375                         request->ie = (void *)(request->ssids + n_ssids);
5376                 else
5377                         request->ie = (void *)(request->channels + n_channels);
5378         }
5379
5380         if (n_match_sets) {
5381                 if (request->ie)
5382                         request->match_sets = (void *)(request->ie + ie_len);
5383                 else if (request->ssids)
5384                         request->match_sets =
5385                                 (void *)(request->ssids + n_ssids);
5386                 else
5387                         request->match_sets =
5388                                 (void *)(request->channels + n_channels);
5389         }
5390         request->n_match_sets = n_match_sets;
5391
5392         i = 0;
5393         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5394                 /* user specified, bail out if channel not found */
5395                 nla_for_each_nested(attr,
5396                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5397                                     tmp) {
5398                         struct ieee80211_channel *chan;
5399
5400                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5401
5402                         if (!chan) {
5403                                 err = -EINVAL;
5404                                 goto out_free;
5405                         }
5406
5407                         /* ignore disabled channels */
5408                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5409                                 continue;
5410
5411                         request->channels[i] = chan;
5412                         i++;
5413                 }
5414         } else {
5415                 /* all channels */
5416                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5417                         int j;
5418                         if (!wiphy->bands[band])
5419                                 continue;
5420                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5421                                 struct ieee80211_channel *chan;
5422
5423                                 chan = &wiphy->bands[band]->channels[j];
5424
5425                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5426                                         continue;
5427
5428                                 request->channels[i] = chan;
5429                                 i++;
5430                         }
5431                 }
5432         }
5433
5434         if (!i) {
5435                 err = -EINVAL;
5436                 goto out_free;
5437         }
5438
5439         request->n_channels = i;
5440
5441         i = 0;
5442         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5443                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5444                                     tmp) {
5445                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5446                                 err = -EINVAL;
5447                                 goto out_free;
5448                         }
5449                         request->ssids[i].ssid_len = nla_len(attr);
5450                         memcpy(request->ssids[i].ssid, nla_data(attr),
5451                                nla_len(attr));
5452                         i++;
5453                 }
5454         }
5455
5456         i = 0;
5457         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5458                 nla_for_each_nested(attr,
5459                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5460                                     tmp) {
5461                         struct nlattr *ssid, *rssi;
5462
5463                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5464                                   nla_data(attr), nla_len(attr),
5465                                   nl80211_match_policy);
5466                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5467                         if (ssid) {
5468                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5469                                         err = -EINVAL;
5470                                         goto out_free;
5471                                 }
5472                                 memcpy(request->match_sets[i].ssid.ssid,
5473                                        nla_data(ssid), nla_len(ssid));
5474                                 request->match_sets[i].ssid.ssid_len =
5475                                         nla_len(ssid);
5476                         }
5477                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5478                         if (rssi)
5479                                 request->rssi_thold = nla_get_u32(rssi);
5480                         else
5481                                 request->rssi_thold =
5482                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5483                         i++;
5484                 }
5485         }
5486
5487         if (info->attrs[NL80211_ATTR_IE]) {
5488                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5489                 memcpy((void *)request->ie,
5490                        nla_data(info->attrs[NL80211_ATTR_IE]),
5491                        request->ie_len);
5492         }
5493
5494         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5495                 request->flags = nla_get_u32(
5496                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5497                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5498                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5499                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5500                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5501                         err = -EOPNOTSUPP;
5502                         goto out_free;
5503                 }
5504         }
5505
5506         request->dev = dev;
5507         request->wiphy = &rdev->wiphy;
5508         request->interval = interval;
5509         request->scan_start = jiffies;
5510
5511         err = rdev_sched_scan_start(rdev, dev, request);
5512         if (!err) {
5513                 rdev->sched_scan_req = request;
5514                 nl80211_send_sched_scan(rdev, dev,
5515                                         NL80211_CMD_START_SCHED_SCAN);
5516                 goto out;
5517         }
5518
5519 out_free:
5520         kfree(request);
5521 out:
5522         return err;
5523 }
5524
5525 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5526                                    struct genl_info *info)
5527 {
5528         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5529
5530         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5531             !rdev->ops->sched_scan_stop)
5532                 return -EOPNOTSUPP;
5533
5534         return __cfg80211_stop_sched_scan(rdev, false);
5535 }
5536
5537 static int nl80211_start_radar_detection(struct sk_buff *skb,
5538                                          struct genl_info *info)
5539 {
5540         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5541         struct net_device *dev = info->user_ptr[1];
5542         struct wireless_dev *wdev = dev->ieee80211_ptr;
5543         struct cfg80211_chan_def chandef;
5544         int err;
5545
5546         err = nl80211_parse_chandef(rdev, info, &chandef);
5547         if (err)
5548                 return err;
5549
5550         if (wdev->cac_started)
5551                 return -EBUSY;
5552
5553         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5554         if (err < 0)
5555                 return err;
5556
5557         if (err == 0)
5558                 return -EINVAL;
5559
5560         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5561                 return -EINVAL;
5562
5563         if (!rdev->ops->start_radar_detection)
5564                 return -EOPNOTSUPP;
5565
5566         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5567                                            chandef.chan, CHAN_MODE_SHARED,
5568                                            BIT(chandef.width));
5569         if (err)
5570                 return err;
5571
5572         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5573         if (!err) {
5574                 wdev->channel = chandef.chan;
5575                 wdev->cac_started = true;
5576                 wdev->cac_start_time = jiffies;
5577         }
5578         return err;
5579 }
5580
5581 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5582                             u32 seq, int flags,
5583                             struct cfg80211_registered_device *rdev,
5584                             struct wireless_dev *wdev,
5585                             struct cfg80211_internal_bss *intbss)
5586 {
5587         struct cfg80211_bss *res = &intbss->pub;
5588         const struct cfg80211_bss_ies *ies;
5589         void *hdr;
5590         struct nlattr *bss;
5591         bool tsf = false;
5592
5593         ASSERT_WDEV_LOCK(wdev);
5594
5595         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5596                              NL80211_CMD_NEW_SCAN_RESULTS);
5597         if (!hdr)
5598                 return -1;
5599
5600         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5601
5602         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5603                 goto nla_put_failure;
5604         if (wdev->netdev &&
5605             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5606                 goto nla_put_failure;
5607         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5608                 goto nla_put_failure;
5609
5610         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5611         if (!bss)
5612                 goto nla_put_failure;
5613         if ((!is_zero_ether_addr(res->bssid) &&
5614              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5615                 goto nla_put_failure;
5616
5617         rcu_read_lock();
5618         ies = rcu_dereference(res->ies);
5619         if (ies) {
5620                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5621                         goto fail_unlock_rcu;
5622                 tsf = true;
5623                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5624                                         ies->len, ies->data))
5625                         goto fail_unlock_rcu;
5626         }
5627         ies = rcu_dereference(res->beacon_ies);
5628         if (ies) {
5629                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5630                         goto fail_unlock_rcu;
5631                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5632                                         ies->len, ies->data))
5633                         goto fail_unlock_rcu;
5634         }
5635         rcu_read_unlock();
5636
5637         if (res->beacon_interval &&
5638             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5639                 goto nla_put_failure;
5640         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5641             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5642             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5643                         jiffies_to_msecs(jiffies - intbss->ts)))
5644                 goto nla_put_failure;
5645
5646         switch (rdev->wiphy.signal_type) {
5647         case CFG80211_SIGNAL_TYPE_MBM:
5648                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5649                         goto nla_put_failure;
5650                 break;
5651         case CFG80211_SIGNAL_TYPE_UNSPEC:
5652                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5653                         goto nla_put_failure;
5654                 break;
5655         default:
5656                 break;
5657         }
5658
5659         switch (wdev->iftype) {
5660         case NL80211_IFTYPE_P2P_CLIENT:
5661         case NL80211_IFTYPE_STATION:
5662                 if (intbss == wdev->current_bss &&
5663                     nla_put_u32(msg, NL80211_BSS_STATUS,
5664                                 NL80211_BSS_STATUS_ASSOCIATED))
5665                         goto nla_put_failure;
5666                 break;
5667         case NL80211_IFTYPE_ADHOC:
5668                 if (intbss == wdev->current_bss &&
5669                     nla_put_u32(msg, NL80211_BSS_STATUS,
5670                                 NL80211_BSS_STATUS_IBSS_JOINED))
5671                         goto nla_put_failure;
5672                 break;
5673         default:
5674                 break;
5675         }
5676
5677         nla_nest_end(msg, bss);
5678
5679         return genlmsg_end(msg, hdr);
5680
5681  fail_unlock_rcu:
5682         rcu_read_unlock();
5683  nla_put_failure:
5684         genlmsg_cancel(msg, hdr);
5685         return -EMSGSIZE;
5686 }
5687
5688 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5689 {
5690         struct cfg80211_registered_device *rdev;
5691         struct cfg80211_internal_bss *scan;
5692         struct wireless_dev *wdev;
5693         int start = cb->args[2], idx = 0;
5694         int err;
5695
5696         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5697         if (err)
5698                 return err;
5699
5700         wdev_lock(wdev);
5701         spin_lock_bh(&rdev->bss_lock);
5702         cfg80211_bss_expire(rdev);
5703
5704         cb->seq = rdev->bss_generation;
5705
5706         list_for_each_entry(scan, &rdev->bss_list, list) {
5707                 if (++idx <= start)
5708                         continue;
5709                 if (nl80211_send_bss(skb, cb,
5710                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5711                                 rdev, wdev, scan) < 0) {
5712                         idx--;
5713                         break;
5714                 }
5715         }
5716
5717         spin_unlock_bh(&rdev->bss_lock);
5718         wdev_unlock(wdev);
5719
5720         cb->args[2] = idx;
5721         nl80211_finish_wdev_dump(rdev);
5722
5723         return skb->len;
5724 }
5725
5726 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5727                                 int flags, struct net_device *dev,
5728                                 struct survey_info *survey)
5729 {
5730         void *hdr;
5731         struct nlattr *infoattr;
5732
5733         hdr = nl80211hdr_put(msg, portid, seq, flags,
5734                              NL80211_CMD_NEW_SURVEY_RESULTS);
5735         if (!hdr)
5736                 return -ENOMEM;
5737
5738         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5739                 goto nla_put_failure;
5740
5741         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5742         if (!infoattr)
5743                 goto nla_put_failure;
5744
5745         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5746                         survey->channel->center_freq))
5747                 goto nla_put_failure;
5748
5749         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5750             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5751                 goto nla_put_failure;
5752         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5753             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5754                 goto nla_put_failure;
5755         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5756             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5757                         survey->channel_time))
5758                 goto nla_put_failure;
5759         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5760             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5761                         survey->channel_time_busy))
5762                 goto nla_put_failure;
5763         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5764             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5765                         survey->channel_time_ext_busy))
5766                 goto nla_put_failure;
5767         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5768             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5769                         survey->channel_time_rx))
5770                 goto nla_put_failure;
5771         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5772             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5773                         survey->channel_time_tx))
5774                 goto nla_put_failure;
5775
5776         nla_nest_end(msg, infoattr);
5777
5778         return genlmsg_end(msg, hdr);
5779
5780  nla_put_failure:
5781         genlmsg_cancel(msg, hdr);
5782         return -EMSGSIZE;
5783 }
5784
5785 static int nl80211_dump_survey(struct sk_buff *skb,
5786                         struct netlink_callback *cb)
5787 {
5788         struct survey_info survey;
5789         struct cfg80211_registered_device *dev;
5790         struct wireless_dev *wdev;
5791         int survey_idx = cb->args[2];
5792         int res;
5793
5794         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
5795         if (res)
5796                 return res;
5797
5798         if (!wdev->netdev) {
5799                 res = -EINVAL;
5800                 goto out_err;
5801         }
5802
5803         if (!dev->ops->dump_survey) {
5804                 res = -EOPNOTSUPP;
5805                 goto out_err;
5806         }
5807
5808         while (1) {
5809                 struct ieee80211_channel *chan;
5810
5811                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
5812                 if (res == -ENOENT)
5813                         break;
5814                 if (res)
5815                         goto out_err;
5816
5817                 /* Survey without a channel doesn't make sense */
5818                 if (!survey.channel) {
5819                         res = -EINVAL;
5820                         goto out;
5821                 }
5822
5823                 chan = ieee80211_get_channel(&dev->wiphy,
5824                                              survey.channel->center_freq);
5825                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5826                         survey_idx++;
5827                         continue;
5828                 }
5829
5830                 if (nl80211_send_survey(skb,
5831                                 NETLINK_CB(cb->skb).portid,
5832                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5833                                 wdev->netdev, &survey) < 0)
5834                         goto out;
5835                 survey_idx++;
5836         }
5837
5838  out:
5839         cb->args[2] = survey_idx;
5840         res = skb->len;
5841  out_err:
5842         nl80211_finish_wdev_dump(dev);
5843         return res;
5844 }
5845
5846 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5847 {
5848         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5849                                   NL80211_WPA_VERSION_2));
5850 }
5851
5852 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5853 {
5854         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5855         struct net_device *dev = info->user_ptr[1];
5856         struct ieee80211_channel *chan;
5857         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5858         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5859         enum nl80211_auth_type auth_type;
5860         struct key_parse key;
5861         bool local_state_change;
5862
5863         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5864                 return -EINVAL;
5865
5866         if (!info->attrs[NL80211_ATTR_MAC])
5867                 return -EINVAL;
5868
5869         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5870                 return -EINVAL;
5871
5872         if (!info->attrs[NL80211_ATTR_SSID])
5873                 return -EINVAL;
5874
5875         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5876                 return -EINVAL;
5877
5878         err = nl80211_parse_key(info, &key);
5879         if (err)
5880                 return err;
5881
5882         if (key.idx >= 0) {
5883                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5884                         return -EINVAL;
5885                 if (!key.p.key || !key.p.key_len)
5886                         return -EINVAL;
5887                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5888                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5889                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5890                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5891                         return -EINVAL;
5892                 if (key.idx > 4)
5893                         return -EINVAL;
5894         } else {
5895                 key.p.key_len = 0;
5896                 key.p.key = NULL;
5897         }
5898
5899         if (key.idx >= 0) {
5900                 int i;
5901                 bool ok = false;
5902                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5903                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5904                                 ok = true;
5905                                 break;
5906                         }
5907                 }
5908                 if (!ok)
5909                         return -EINVAL;
5910         }
5911
5912         if (!rdev->ops->auth)
5913                 return -EOPNOTSUPP;
5914
5915         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5916             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5917                 return -EOPNOTSUPP;
5918
5919         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5920         chan = ieee80211_get_channel(&rdev->wiphy,
5921                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5922         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5923                 return -EINVAL;
5924
5925         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5926         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5927
5928         if (info->attrs[NL80211_ATTR_IE]) {
5929                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5930                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5931         }
5932
5933         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5934         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5935                 return -EINVAL;
5936
5937         if (auth_type == NL80211_AUTHTYPE_SAE &&
5938             !info->attrs[NL80211_ATTR_SAE_DATA])
5939                 return -EINVAL;
5940
5941         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5942                 if (auth_type != NL80211_AUTHTYPE_SAE)
5943                         return -EINVAL;
5944                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5945                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5946                 /* need to include at least Auth Transaction and Status Code */
5947                 if (sae_data_len < 4)
5948                         return -EINVAL;
5949         }
5950
5951         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5952
5953         /*
5954          * Since we no longer track auth state, ignore
5955          * requests to only change local state.
5956          */
5957         if (local_state_change)
5958                 return 0;
5959
5960         wdev_lock(dev->ieee80211_ptr);
5961         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5962                                  ssid, ssid_len, ie, ie_len,
5963                                  key.p.key, key.p.key_len, key.idx,
5964                                  sae_data, sae_data_len);
5965         wdev_unlock(dev->ieee80211_ptr);
5966         return err;
5967 }
5968
5969 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5970                                    struct genl_info *info,
5971                                    struct cfg80211_crypto_settings *settings,
5972                                    int cipher_limit)
5973 {
5974         memset(settings, 0, sizeof(*settings));
5975
5976         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5977
5978         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5979                 u16 proto;
5980                 proto = nla_get_u16(
5981                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5982                 settings->control_port_ethertype = cpu_to_be16(proto);
5983                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5984                     proto != ETH_P_PAE)
5985                         return -EINVAL;
5986                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5987                         settings->control_port_no_encrypt = true;
5988         } else
5989                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5990
5991         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5992                 void *data;
5993                 int len, i;
5994
5995                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5996                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5997                 settings->n_ciphers_pairwise = len / sizeof(u32);
5998
5999                 if (len % sizeof(u32))
6000                         return -EINVAL;
6001
6002                 if (settings->n_ciphers_pairwise > cipher_limit)
6003                         return -EINVAL;
6004
6005                 memcpy(settings->ciphers_pairwise, data, len);
6006
6007                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6008                         if (!cfg80211_supported_cipher_suite(
6009                                         &rdev->wiphy,
6010                                         settings->ciphers_pairwise[i]))
6011                                 return -EINVAL;
6012         }
6013
6014         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6015                 settings->cipher_group =
6016                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6017                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6018                                                      settings->cipher_group))
6019                         return -EINVAL;
6020         }
6021
6022         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6023                 settings->wpa_versions =
6024                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6025                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6026                         return -EINVAL;
6027         }
6028
6029         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6030                 void *data;
6031                 int len;
6032
6033                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6034                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6035                 settings->n_akm_suites = len / sizeof(u32);
6036
6037                 if (len % sizeof(u32))
6038                         return -EINVAL;
6039
6040                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6041                         return -EINVAL;
6042
6043                 memcpy(settings->akm_suites, data, len);
6044         }
6045
6046         return 0;
6047 }
6048
6049 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6050 {
6051         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6052         struct net_device *dev = info->user_ptr[1];
6053         struct ieee80211_channel *chan;
6054         struct cfg80211_assoc_request req = {};
6055         const u8 *bssid, *ssid;
6056         int err, ssid_len = 0;
6057
6058         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6059                 return -EINVAL;
6060
6061         if (!info->attrs[NL80211_ATTR_MAC] ||
6062             !info->attrs[NL80211_ATTR_SSID] ||
6063             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6064                 return -EINVAL;
6065
6066         if (!rdev->ops->assoc)
6067                 return -EOPNOTSUPP;
6068
6069         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6070             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6071                 return -EOPNOTSUPP;
6072
6073         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6074
6075         chan = ieee80211_get_channel(&rdev->wiphy,
6076                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6077         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6078                 return -EINVAL;
6079
6080         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6081         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6082
6083         if (info->attrs[NL80211_ATTR_IE]) {
6084                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6085                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6086         }
6087
6088         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6089                 enum nl80211_mfp mfp =
6090                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6091                 if (mfp == NL80211_MFP_REQUIRED)
6092                         req.use_mfp = true;
6093                 else if (mfp != NL80211_MFP_NO)
6094                         return -EINVAL;
6095         }
6096
6097         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6098                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6099
6100         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6101                 req.flags |= ASSOC_REQ_DISABLE_HT;
6102
6103         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6104                 memcpy(&req.ht_capa_mask,
6105                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6106                        sizeof(req.ht_capa_mask));
6107
6108         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6109                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6110                         return -EINVAL;
6111                 memcpy(&req.ht_capa,
6112                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6113                        sizeof(req.ht_capa));
6114         }
6115
6116         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6117                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6118
6119         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6120                 memcpy(&req.vht_capa_mask,
6121                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6122                        sizeof(req.vht_capa_mask));
6123
6124         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6125                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6126                         return -EINVAL;
6127                 memcpy(&req.vht_capa,
6128                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6129                        sizeof(req.vht_capa));
6130         }
6131
6132         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6133         if (!err) {
6134                 wdev_lock(dev->ieee80211_ptr);
6135                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6136                                           ssid, ssid_len, &req);
6137                 wdev_unlock(dev->ieee80211_ptr);
6138         }
6139
6140         return err;
6141 }
6142
6143 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6144 {
6145         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6146         struct net_device *dev = info->user_ptr[1];
6147         const u8 *ie = NULL, *bssid;
6148         int ie_len = 0, err;
6149         u16 reason_code;
6150         bool local_state_change;
6151
6152         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6153                 return -EINVAL;
6154
6155         if (!info->attrs[NL80211_ATTR_MAC])
6156                 return -EINVAL;
6157
6158         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6159                 return -EINVAL;
6160
6161         if (!rdev->ops->deauth)
6162                 return -EOPNOTSUPP;
6163
6164         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6165             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6166                 return -EOPNOTSUPP;
6167
6168         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6169
6170         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6171         if (reason_code == 0) {
6172                 /* Reason Code 0 is reserved */
6173                 return -EINVAL;
6174         }
6175
6176         if (info->attrs[NL80211_ATTR_IE]) {
6177                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6178                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6179         }
6180
6181         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6182
6183         wdev_lock(dev->ieee80211_ptr);
6184         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6185                                    local_state_change);
6186         wdev_unlock(dev->ieee80211_ptr);
6187         return err;
6188 }
6189
6190 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6191 {
6192         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6193         struct net_device *dev = info->user_ptr[1];
6194         const u8 *ie = NULL, *bssid;
6195         int ie_len = 0, err;
6196         u16 reason_code;
6197         bool local_state_change;
6198
6199         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6200                 return -EINVAL;
6201
6202         if (!info->attrs[NL80211_ATTR_MAC])
6203                 return -EINVAL;
6204
6205         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6206                 return -EINVAL;
6207
6208         if (!rdev->ops->disassoc)
6209                 return -EOPNOTSUPP;
6210
6211         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6212             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6213                 return -EOPNOTSUPP;
6214
6215         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6216
6217         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6218         if (reason_code == 0) {
6219                 /* Reason Code 0 is reserved */
6220                 return -EINVAL;
6221         }
6222
6223         if (info->attrs[NL80211_ATTR_IE]) {
6224                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6225                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6226         }
6227
6228         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6229
6230         wdev_lock(dev->ieee80211_ptr);
6231         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6232                                      local_state_change);
6233         wdev_unlock(dev->ieee80211_ptr);
6234         return err;
6235 }
6236
6237 static bool
6238 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6239                          int mcast_rate[IEEE80211_NUM_BANDS],
6240                          int rateval)
6241 {
6242         struct wiphy *wiphy = &rdev->wiphy;
6243         bool found = false;
6244         int band, i;
6245
6246         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6247                 struct ieee80211_supported_band *sband;
6248
6249                 sband = wiphy->bands[band];
6250                 if (!sband)
6251                         continue;
6252
6253                 for (i = 0; i < sband->n_bitrates; i++) {
6254                         if (sband->bitrates[i].bitrate == rateval) {
6255                                 mcast_rate[band] = i + 1;
6256                                 found = true;
6257                                 break;
6258                         }
6259                 }
6260         }
6261
6262         return found;
6263 }
6264
6265 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6266 {
6267         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6268         struct net_device *dev = info->user_ptr[1];
6269         struct cfg80211_ibss_params ibss;
6270         struct wiphy *wiphy;
6271         struct cfg80211_cached_keys *connkeys = NULL;
6272         int err;
6273
6274         memset(&ibss, 0, sizeof(ibss));
6275
6276         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6277                 return -EINVAL;
6278
6279         if (!info->attrs[NL80211_ATTR_SSID] ||
6280             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6281                 return -EINVAL;
6282
6283         ibss.beacon_interval = 100;
6284
6285         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6286                 ibss.beacon_interval =
6287                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6288                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6289                         return -EINVAL;
6290         }
6291
6292         if (!rdev->ops->join_ibss)
6293                 return -EOPNOTSUPP;
6294
6295         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6296                 return -EOPNOTSUPP;
6297
6298         wiphy = &rdev->wiphy;
6299
6300         if (info->attrs[NL80211_ATTR_MAC]) {
6301                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6302
6303                 if (!is_valid_ether_addr(ibss.bssid))
6304                         return -EINVAL;
6305         }
6306         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6307         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6308
6309         if (info->attrs[NL80211_ATTR_IE]) {
6310                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6311                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6312         }
6313
6314         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6315         if (err)
6316                 return err;
6317
6318         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6319                 return -EINVAL;
6320
6321         switch (ibss.chandef.width) {
6322         case NL80211_CHAN_WIDTH_20_NOHT:
6323                 break;
6324         case NL80211_CHAN_WIDTH_20:
6325         case NL80211_CHAN_WIDTH_40:
6326                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6327                         break;
6328         default:
6329                 return -EINVAL;
6330         }
6331
6332         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6333         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6334
6335         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6336                 u8 *rates =
6337                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6338                 int n_rates =
6339                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6340                 struct ieee80211_supported_band *sband =
6341                         wiphy->bands[ibss.chandef.chan->band];
6342
6343                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6344                                              &ibss.basic_rates);
6345                 if (err)
6346                         return err;
6347         }
6348
6349         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6350             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6351                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6352                 return -EINVAL;
6353
6354         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6355                 bool no_ht = false;
6356
6357                 connkeys = nl80211_parse_connkeys(rdev,
6358                                           info->attrs[NL80211_ATTR_KEYS],
6359                                           &no_ht);
6360                 if (IS_ERR(connkeys))
6361                         return PTR_ERR(connkeys);
6362
6363                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6364                     no_ht) {
6365                         kfree(connkeys);
6366                         return -EINVAL;
6367                 }
6368         }
6369
6370         ibss.control_port =
6371                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6372
6373         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6374         if (err)
6375                 kfree(connkeys);
6376         return err;
6377 }
6378
6379 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6380 {
6381         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6382         struct net_device *dev = info->user_ptr[1];
6383
6384         if (!rdev->ops->leave_ibss)
6385                 return -EOPNOTSUPP;
6386
6387         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6388                 return -EOPNOTSUPP;
6389
6390         return cfg80211_leave_ibss(rdev, dev, false);
6391 }
6392
6393 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6394 {
6395         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6396         struct net_device *dev = info->user_ptr[1];
6397         int mcast_rate[IEEE80211_NUM_BANDS];
6398         u32 nla_rate;
6399         int err;
6400
6401         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6402             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6403                 return -EOPNOTSUPP;
6404
6405         if (!rdev->ops->set_mcast_rate)
6406                 return -EOPNOTSUPP;
6407
6408         memset(mcast_rate, 0, sizeof(mcast_rate));
6409
6410         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6411                 return -EINVAL;
6412
6413         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6414         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6415                 return -EINVAL;
6416
6417         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6418
6419         return err;
6420 }
6421
6422
6423 #ifdef CONFIG_NL80211_TESTMODE
6424 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6425         .name = "testmode",
6426 };
6427
6428 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6429 {
6430         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6431         int err;
6432
6433         if (!info->attrs[NL80211_ATTR_TESTDATA])
6434                 return -EINVAL;
6435
6436         err = -EOPNOTSUPP;
6437         if (rdev->ops->testmode_cmd) {
6438                 rdev->testmode_info = info;
6439                 err = rdev_testmode_cmd(rdev,
6440                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6441                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6442                 rdev->testmode_info = NULL;
6443         }
6444
6445         return err;
6446 }
6447
6448 static int nl80211_testmode_dump(struct sk_buff *skb,
6449                                  struct netlink_callback *cb)
6450 {
6451         struct cfg80211_registered_device *rdev;
6452         int err;
6453         long phy_idx;
6454         void *data = NULL;
6455         int data_len = 0;
6456
6457         rtnl_lock();
6458
6459         if (cb->args[0]) {
6460                 /*
6461                  * 0 is a valid index, but not valid for args[0],
6462                  * so we need to offset by 1.
6463                  */
6464                 phy_idx = cb->args[0] - 1;
6465         } else {
6466                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6467                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6468                                   nl80211_policy);
6469                 if (err)
6470                         goto out_err;
6471
6472                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6473                                                   nl80211_fam.attrbuf);
6474                 if (IS_ERR(rdev)) {
6475                         err = PTR_ERR(rdev);
6476                         goto out_err;
6477                 }
6478                 phy_idx = rdev->wiphy_idx;
6479                 rdev = NULL;
6480
6481                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6482                         cb->args[1] =
6483                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6484         }
6485
6486         if (cb->args[1]) {
6487                 data = nla_data((void *)cb->args[1]);
6488                 data_len = nla_len((void *)cb->args[1]);
6489         }
6490
6491         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6492         if (!rdev) {
6493                 err = -ENOENT;
6494                 goto out_err;
6495         }
6496
6497         if (!rdev->ops->testmode_dump) {
6498                 err = -EOPNOTSUPP;
6499                 goto out_err;
6500         }
6501
6502         while (1) {
6503                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6504                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6505                                            NL80211_CMD_TESTMODE);
6506                 struct nlattr *tmdata;
6507
6508                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6509                         genlmsg_cancel(skb, hdr);
6510                         break;
6511                 }
6512
6513                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6514                 if (!tmdata) {
6515                         genlmsg_cancel(skb, hdr);
6516                         break;
6517                 }
6518                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6519                 nla_nest_end(skb, tmdata);
6520
6521                 if (err == -ENOBUFS || err == -ENOENT) {
6522                         genlmsg_cancel(skb, hdr);
6523                         break;
6524                 } else if (err) {
6525                         genlmsg_cancel(skb, hdr);
6526                         goto out_err;
6527                 }
6528
6529                 genlmsg_end(skb, hdr);
6530         }
6531
6532         err = skb->len;
6533         /* see above */
6534         cb->args[0] = phy_idx + 1;
6535  out_err:
6536         rtnl_unlock();
6537         return err;
6538 }
6539
6540 static struct sk_buff *
6541 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6542                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6543 {
6544         struct sk_buff *skb;
6545         void *hdr;
6546         struct nlattr *data;
6547
6548         skb = nlmsg_new(approxlen + 100, gfp);
6549         if (!skb)
6550                 return NULL;
6551
6552         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6553         if (!hdr) {
6554                 kfree_skb(skb);
6555                 return NULL;
6556         }
6557
6558         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6559                 goto nla_put_failure;
6560         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6561
6562         ((void **)skb->cb)[0] = rdev;
6563         ((void **)skb->cb)[1] = hdr;
6564         ((void **)skb->cb)[2] = data;
6565
6566         return skb;
6567
6568  nla_put_failure:
6569         kfree_skb(skb);
6570         return NULL;
6571 }
6572
6573 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6574                                                   int approxlen)
6575 {
6576         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6577
6578         if (WARN_ON(!rdev->testmode_info))
6579                 return NULL;
6580
6581         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6582                                 rdev->testmode_info->snd_portid,
6583                                 rdev->testmode_info->snd_seq,
6584                                 GFP_KERNEL);
6585 }
6586 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6587
6588 int cfg80211_testmode_reply(struct sk_buff *skb)
6589 {
6590         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6591         void *hdr = ((void **)skb->cb)[1];
6592         struct nlattr *data = ((void **)skb->cb)[2];
6593
6594         if (WARN_ON(!rdev->testmode_info)) {
6595                 kfree_skb(skb);
6596                 return -EINVAL;
6597         }
6598
6599         nla_nest_end(skb, data);
6600         genlmsg_end(skb, hdr);
6601         return genlmsg_reply(skb, rdev->testmode_info);
6602 }
6603 EXPORT_SYMBOL(cfg80211_testmode_reply);
6604
6605 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6606                                                   int approxlen, gfp_t gfp)
6607 {
6608         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6609
6610         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6611 }
6612 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6613
6614 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6615 {
6616         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6617         void *hdr = ((void **)skb->cb)[1];
6618         struct nlattr *data = ((void **)skb->cb)[2];
6619
6620         nla_nest_end(skb, data);
6621         genlmsg_end(skb, hdr);
6622         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
6623                                 nl80211_testmode_mcgrp.id, gfp);
6624 }
6625 EXPORT_SYMBOL(cfg80211_testmode_event);
6626 #endif
6627
6628 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6629 {
6630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6631         struct net_device *dev = info->user_ptr[1];
6632         struct cfg80211_connect_params connect;
6633         struct wiphy *wiphy;
6634         struct cfg80211_cached_keys *connkeys = NULL;
6635         int err;
6636
6637         memset(&connect, 0, sizeof(connect));
6638
6639         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6640                 return -EINVAL;
6641
6642         if (!info->attrs[NL80211_ATTR_SSID] ||
6643             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6644                 return -EINVAL;
6645
6646         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6647                 connect.auth_type =
6648                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6649                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6650                                              NL80211_CMD_CONNECT))
6651                         return -EINVAL;
6652         } else
6653                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6654
6655         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6656
6657         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6658                                       NL80211_MAX_NR_CIPHER_SUITES);
6659         if (err)
6660                 return err;
6661
6662         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6663             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6664                 return -EOPNOTSUPP;
6665
6666         wiphy = &rdev->wiphy;
6667
6668         connect.bg_scan_period = -1;
6669         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6670                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6671                 connect.bg_scan_period =
6672                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6673         }
6674
6675         if (info->attrs[NL80211_ATTR_MAC])
6676                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6677         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6678         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6679
6680         if (info->attrs[NL80211_ATTR_IE]) {
6681                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6682                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6683         }
6684
6685         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6686                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6687                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6688                     connect.mfp != NL80211_MFP_NO)
6689                         return -EINVAL;
6690         } else {
6691                 connect.mfp = NL80211_MFP_NO;
6692         }
6693
6694         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6695                 connect.channel =
6696                         ieee80211_get_channel(wiphy,
6697                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6698                 if (!connect.channel ||
6699                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6700                         return -EINVAL;
6701         }
6702
6703         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6704                 connkeys = nl80211_parse_connkeys(rdev,
6705                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6706                 if (IS_ERR(connkeys))
6707                         return PTR_ERR(connkeys);
6708         }
6709
6710         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6711                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6712
6713         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6714                 memcpy(&connect.ht_capa_mask,
6715                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6716                        sizeof(connect.ht_capa_mask));
6717
6718         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6719                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6720                         kfree(connkeys);
6721                         return -EINVAL;
6722                 }
6723                 memcpy(&connect.ht_capa,
6724                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6725                        sizeof(connect.ht_capa));
6726         }
6727
6728         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6729                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6730
6731         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6732                 memcpy(&connect.vht_capa_mask,
6733                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6734                        sizeof(connect.vht_capa_mask));
6735
6736         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6737                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
6738                         kfree(connkeys);
6739                         return -EINVAL;
6740                 }
6741                 memcpy(&connect.vht_capa,
6742                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6743                        sizeof(connect.vht_capa));
6744         }
6745
6746         wdev_lock(dev->ieee80211_ptr);
6747         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
6748         wdev_unlock(dev->ieee80211_ptr);
6749         if (err)
6750                 kfree(connkeys);
6751         return err;
6752 }
6753
6754 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6755 {
6756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6757         struct net_device *dev = info->user_ptr[1];
6758         u16 reason;
6759         int ret;
6760
6761         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6762                 reason = WLAN_REASON_DEAUTH_LEAVING;
6763         else
6764                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6765
6766         if (reason == 0)
6767                 return -EINVAL;
6768
6769         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6770             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6771                 return -EOPNOTSUPP;
6772
6773         wdev_lock(dev->ieee80211_ptr);
6774         ret = cfg80211_disconnect(rdev, dev, reason, true);
6775         wdev_unlock(dev->ieee80211_ptr);
6776         return ret;
6777 }
6778
6779 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6780 {
6781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6782         struct net *net;
6783         int err;
6784         u32 pid;
6785
6786         if (!info->attrs[NL80211_ATTR_PID])
6787                 return -EINVAL;
6788
6789         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6790
6791         net = get_net_ns_by_pid(pid);
6792         if (IS_ERR(net))
6793                 return PTR_ERR(net);
6794
6795         err = 0;
6796
6797         /* check if anything to do */
6798         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6799                 err = cfg80211_switch_netns(rdev, net);
6800
6801         put_net(net);
6802         return err;
6803 }
6804
6805 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6806 {
6807         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6808         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6809                         struct cfg80211_pmksa *pmksa) = NULL;
6810         struct net_device *dev = info->user_ptr[1];
6811         struct cfg80211_pmksa pmksa;
6812
6813         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6814
6815         if (!info->attrs[NL80211_ATTR_MAC])
6816                 return -EINVAL;
6817
6818         if (!info->attrs[NL80211_ATTR_PMKID])
6819                 return -EINVAL;
6820
6821         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6822         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6823
6824         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6825             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6826                 return -EOPNOTSUPP;
6827
6828         switch (info->genlhdr->cmd) {
6829         case NL80211_CMD_SET_PMKSA:
6830                 rdev_ops = rdev->ops->set_pmksa;
6831                 break;
6832         case NL80211_CMD_DEL_PMKSA:
6833                 rdev_ops = rdev->ops->del_pmksa;
6834                 break;
6835         default:
6836                 WARN_ON(1);
6837                 break;
6838         }
6839
6840         if (!rdev_ops)
6841                 return -EOPNOTSUPP;
6842
6843         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6844 }
6845
6846 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6847 {
6848         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6849         struct net_device *dev = info->user_ptr[1];
6850
6851         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6852             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6853                 return -EOPNOTSUPP;
6854
6855         if (!rdev->ops->flush_pmksa)
6856                 return -EOPNOTSUPP;
6857
6858         return rdev_flush_pmksa(rdev, dev);
6859 }
6860
6861 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6862 {
6863         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6864         struct net_device *dev = info->user_ptr[1];
6865         u8 action_code, dialog_token;
6866         u16 status_code;
6867         u8 *peer;
6868
6869         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6870             !rdev->ops->tdls_mgmt)
6871                 return -EOPNOTSUPP;
6872
6873         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6874             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6875             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6876             !info->attrs[NL80211_ATTR_IE] ||
6877             !info->attrs[NL80211_ATTR_MAC])
6878                 return -EINVAL;
6879
6880         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6881         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6882         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6883         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6884
6885         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6886                               dialog_token, status_code,
6887                               nla_data(info->attrs[NL80211_ATTR_IE]),
6888                               nla_len(info->attrs[NL80211_ATTR_IE]));
6889 }
6890
6891 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6892 {
6893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6894         struct net_device *dev = info->user_ptr[1];
6895         enum nl80211_tdls_operation operation;
6896         u8 *peer;
6897
6898         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6899             !rdev->ops->tdls_oper)
6900                 return -EOPNOTSUPP;
6901
6902         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6903             !info->attrs[NL80211_ATTR_MAC])
6904                 return -EINVAL;
6905
6906         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6907         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6908
6909         return rdev_tdls_oper(rdev, dev, peer, operation);
6910 }
6911
6912 static int nl80211_remain_on_channel(struct sk_buff *skb,
6913                                      struct genl_info *info)
6914 {
6915         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6916         struct wireless_dev *wdev = info->user_ptr[1];
6917         struct cfg80211_chan_def chandef;
6918         struct sk_buff *msg;
6919         void *hdr;
6920         u64 cookie;
6921         u32 duration;
6922         int err;
6923
6924         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6925             !info->attrs[NL80211_ATTR_DURATION])
6926                 return -EINVAL;
6927
6928         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6929
6930         if (!rdev->ops->remain_on_channel ||
6931             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6932                 return -EOPNOTSUPP;
6933
6934         /*
6935          * We should be on that channel for at least a minimum amount of
6936          * time (10ms) but no longer than the driver supports.
6937          */
6938         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6939             duration > rdev->wiphy.max_remain_on_channel_duration)
6940                 return -EINVAL;
6941
6942         err = nl80211_parse_chandef(rdev, info, &chandef);
6943         if (err)
6944                 return err;
6945
6946         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6947         if (!msg)
6948                 return -ENOMEM;
6949
6950         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6951                              NL80211_CMD_REMAIN_ON_CHANNEL);
6952
6953         if (IS_ERR(hdr)) {
6954                 err = PTR_ERR(hdr);
6955                 goto free_msg;
6956         }
6957
6958         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6959                                      duration, &cookie);
6960
6961         if (err)
6962                 goto free_msg;
6963
6964         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6965                 goto nla_put_failure;
6966
6967         genlmsg_end(msg, hdr);
6968
6969         return genlmsg_reply(msg, info);
6970
6971  nla_put_failure:
6972         err = -ENOBUFS;
6973  free_msg:
6974         nlmsg_free(msg);
6975         return err;
6976 }
6977
6978 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6979                                             struct genl_info *info)
6980 {
6981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6982         struct wireless_dev *wdev = info->user_ptr[1];
6983         u64 cookie;
6984
6985         if (!info->attrs[NL80211_ATTR_COOKIE])
6986                 return -EINVAL;
6987
6988         if (!rdev->ops->cancel_remain_on_channel)
6989                 return -EOPNOTSUPP;
6990
6991         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6992
6993         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6994 }
6995
6996 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6997                            u8 *rates, u8 rates_len)
6998 {
6999         u8 i;
7000         u32 mask = 0;
7001
7002         for (i = 0; i < rates_len; i++) {
7003                 int rate = (rates[i] & 0x7f) * 5;
7004                 int ridx;
7005                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7006                         struct ieee80211_rate *srate =
7007                                 &sband->bitrates[ridx];
7008                         if (rate == srate->bitrate) {
7009                                 mask |= 1 << ridx;
7010                                 break;
7011                         }
7012                 }
7013                 if (ridx == sband->n_bitrates)
7014                         return 0; /* rate not found */
7015         }
7016
7017         return mask;
7018 }
7019
7020 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7021                                u8 *rates, u8 rates_len,
7022                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7023 {
7024         u8 i;
7025
7026         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7027
7028         for (i = 0; i < rates_len; i++) {
7029                 int ridx, rbit;
7030
7031                 ridx = rates[i] / 8;
7032                 rbit = BIT(rates[i] % 8);
7033
7034                 /* check validity */
7035                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7036                         return false;
7037
7038                 /* check availability */
7039                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7040                         mcs[ridx] |= rbit;
7041                 else
7042                         return false;
7043         }
7044
7045         return true;
7046 }
7047
7048 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7049         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7050                                     .len = NL80211_MAX_SUPP_RATES },
7051         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7052                                  .len = NL80211_MAX_SUPP_HT_RATES },
7053 };
7054
7055 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7056                                        struct genl_info *info)
7057 {
7058         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7059         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7060         struct cfg80211_bitrate_mask mask;
7061         int rem, i;
7062         struct net_device *dev = info->user_ptr[1];
7063         struct nlattr *tx_rates;
7064         struct ieee80211_supported_band *sband;
7065
7066         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7067                 return -EINVAL;
7068
7069         if (!rdev->ops->set_bitrate_mask)
7070                 return -EOPNOTSUPP;
7071
7072         memset(&mask, 0, sizeof(mask));
7073         /* Default to all rates enabled */
7074         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7075                 sband = rdev->wiphy.bands[i];
7076                 mask.control[i].legacy =
7077                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7078                 if (sband)
7079                         memcpy(mask.control[i].mcs,
7080                                sband->ht_cap.mcs.rx_mask,
7081                                sizeof(mask.control[i].mcs));
7082                 else
7083                         memset(mask.control[i].mcs, 0,
7084                                sizeof(mask.control[i].mcs));
7085         }
7086
7087         /*
7088          * The nested attribute uses enum nl80211_band as the index. This maps
7089          * directly to the enum ieee80211_band values used in cfg80211.
7090          */
7091         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7092         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7093         {
7094                 enum ieee80211_band band = nla_type(tx_rates);
7095                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7096                         return -EINVAL;
7097                 sband = rdev->wiphy.bands[band];
7098                 if (sband == NULL)
7099                         return -EINVAL;
7100                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7101                           nla_len(tx_rates), nl80211_txattr_policy);
7102                 if (tb[NL80211_TXRATE_LEGACY]) {
7103                         mask.control[band].legacy = rateset_to_mask(
7104                                 sband,
7105                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7106                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7107                         if ((mask.control[band].legacy == 0) &&
7108                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7109                                 return -EINVAL;
7110                 }
7111                 if (tb[NL80211_TXRATE_MCS]) {
7112                         if (!ht_rateset_to_mask(
7113                                         sband,
7114                                         nla_data(tb[NL80211_TXRATE_MCS]),
7115                                         nla_len(tb[NL80211_TXRATE_MCS]),
7116                                         mask.control[band].mcs))
7117                                 return -EINVAL;
7118                 }
7119
7120                 if (mask.control[band].legacy == 0) {
7121                         /* don't allow empty legacy rates if HT
7122                          * is not even supported. */
7123                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7124                                 return -EINVAL;
7125
7126                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7127                                 if (mask.control[band].mcs[i])
7128                                         break;
7129
7130                         /* legacy and mcs rates may not be both empty */
7131                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7132                                 return -EINVAL;
7133                 }
7134         }
7135
7136         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7137 }
7138
7139 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7140 {
7141         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7142         struct wireless_dev *wdev = info->user_ptr[1];
7143         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7144
7145         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7146                 return -EINVAL;
7147
7148         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7149                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7150
7151         switch (wdev->iftype) {
7152         case NL80211_IFTYPE_STATION:
7153         case NL80211_IFTYPE_ADHOC:
7154         case NL80211_IFTYPE_P2P_CLIENT:
7155         case NL80211_IFTYPE_AP:
7156         case NL80211_IFTYPE_AP_VLAN:
7157         case NL80211_IFTYPE_MESH_POINT:
7158         case NL80211_IFTYPE_P2P_GO:
7159         case NL80211_IFTYPE_P2P_DEVICE:
7160                 break;
7161         default:
7162                 return -EOPNOTSUPP;
7163         }
7164
7165         /* not much point in registering if we can't reply */
7166         if (!rdev->ops->mgmt_tx)
7167                 return -EOPNOTSUPP;
7168
7169         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7170                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7171                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7172 }
7173
7174 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7175 {
7176         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7177         struct wireless_dev *wdev = info->user_ptr[1];
7178         struct cfg80211_chan_def chandef;
7179         int err;
7180         void *hdr = NULL;
7181         u64 cookie;
7182         struct sk_buff *msg = NULL;
7183         unsigned int wait = 0;
7184         bool offchan, no_cck, dont_wait_for_ack;
7185
7186         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7187
7188         if (!info->attrs[NL80211_ATTR_FRAME])
7189                 return -EINVAL;
7190
7191         if (!rdev->ops->mgmt_tx)
7192                 return -EOPNOTSUPP;
7193
7194         switch (wdev->iftype) {
7195         case NL80211_IFTYPE_P2P_DEVICE:
7196                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7197                         return -EINVAL;
7198         case NL80211_IFTYPE_STATION:
7199         case NL80211_IFTYPE_ADHOC:
7200         case NL80211_IFTYPE_P2P_CLIENT:
7201         case NL80211_IFTYPE_AP:
7202         case NL80211_IFTYPE_AP_VLAN:
7203         case NL80211_IFTYPE_MESH_POINT:
7204         case NL80211_IFTYPE_P2P_GO:
7205                 break;
7206         default:
7207                 return -EOPNOTSUPP;
7208         }
7209
7210         if (info->attrs[NL80211_ATTR_DURATION]) {
7211                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7212                         return -EINVAL;
7213                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7214
7215                 /*
7216                  * We should wait on the channel for at least a minimum amount
7217                  * of time (10ms) but no longer than the driver supports.
7218                  */
7219                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7220                     wait > rdev->wiphy.max_remain_on_channel_duration)
7221                         return -EINVAL;
7222
7223         }
7224
7225         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7226
7227         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7228                 return -EINVAL;
7229
7230         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7231
7232         /* get the channel if any has been specified, otherwise pass NULL to
7233          * the driver. The latter will use the current one
7234          */
7235         chandef.chan = NULL;
7236         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7237                 err = nl80211_parse_chandef(rdev, info, &chandef);
7238                 if (err)
7239                         return err;
7240         }
7241
7242         if (!chandef.chan && offchan)
7243                 return -EINVAL;
7244
7245         if (!dont_wait_for_ack) {
7246                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7247                 if (!msg)
7248                         return -ENOMEM;
7249
7250                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7251                                      NL80211_CMD_FRAME);
7252
7253                 if (IS_ERR(hdr)) {
7254                         err = PTR_ERR(hdr);
7255                         goto free_msg;
7256                 }
7257         }
7258
7259         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7260                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7261                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7262                                     no_cck, dont_wait_for_ack, &cookie);
7263         if (err)
7264                 goto free_msg;
7265
7266         if (msg) {
7267                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7268                         goto nla_put_failure;
7269
7270                 genlmsg_end(msg, hdr);
7271                 return genlmsg_reply(msg, info);
7272         }
7273
7274         return 0;
7275
7276  nla_put_failure:
7277         err = -ENOBUFS;
7278  free_msg:
7279         nlmsg_free(msg);
7280         return err;
7281 }
7282
7283 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7284 {
7285         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7286         struct wireless_dev *wdev = info->user_ptr[1];
7287         u64 cookie;
7288
7289         if (!info->attrs[NL80211_ATTR_COOKIE])
7290                 return -EINVAL;
7291
7292         if (!rdev->ops->mgmt_tx_cancel_wait)
7293                 return -EOPNOTSUPP;
7294
7295         switch (wdev->iftype) {
7296         case NL80211_IFTYPE_STATION:
7297         case NL80211_IFTYPE_ADHOC:
7298         case NL80211_IFTYPE_P2P_CLIENT:
7299         case NL80211_IFTYPE_AP:
7300         case NL80211_IFTYPE_AP_VLAN:
7301         case NL80211_IFTYPE_P2P_GO:
7302         case NL80211_IFTYPE_P2P_DEVICE:
7303                 break;
7304         default:
7305                 return -EOPNOTSUPP;
7306         }
7307
7308         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7309
7310         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7311 }
7312
7313 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7314 {
7315         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7316         struct wireless_dev *wdev;
7317         struct net_device *dev = info->user_ptr[1];
7318         u8 ps_state;
7319         bool state;
7320         int err;
7321
7322         if (!info->attrs[NL80211_ATTR_PS_STATE])
7323                 return -EINVAL;
7324
7325         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7326
7327         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7328                 return -EINVAL;
7329
7330         wdev = dev->ieee80211_ptr;
7331
7332         if (!rdev->ops->set_power_mgmt)
7333                 return -EOPNOTSUPP;
7334
7335         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7336
7337         if (state == wdev->ps)
7338                 return 0;
7339
7340         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7341         if (!err)
7342                 wdev->ps = state;
7343         return err;
7344 }
7345
7346 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7347 {
7348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7349         enum nl80211_ps_state ps_state;
7350         struct wireless_dev *wdev;
7351         struct net_device *dev = info->user_ptr[1];
7352         struct sk_buff *msg;
7353         void *hdr;
7354         int err;
7355
7356         wdev = dev->ieee80211_ptr;
7357
7358         if (!rdev->ops->set_power_mgmt)
7359                 return -EOPNOTSUPP;
7360
7361         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7362         if (!msg)
7363                 return -ENOMEM;
7364
7365         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7366                              NL80211_CMD_GET_POWER_SAVE);
7367         if (!hdr) {
7368                 err = -ENOBUFS;
7369                 goto free_msg;
7370         }
7371
7372         if (wdev->ps)
7373                 ps_state = NL80211_PS_ENABLED;
7374         else
7375                 ps_state = NL80211_PS_DISABLED;
7376
7377         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7378                 goto nla_put_failure;
7379
7380         genlmsg_end(msg, hdr);
7381         return genlmsg_reply(msg, info);
7382
7383  nla_put_failure:
7384         err = -ENOBUFS;
7385  free_msg:
7386         nlmsg_free(msg);
7387         return err;
7388 }
7389
7390 static struct nla_policy
7391 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7392         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7393         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7394         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7395         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7396         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7397         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7398 };
7399
7400 static int nl80211_set_cqm_txe(struct genl_info *info,
7401                                u32 rate, u32 pkts, u32 intvl)
7402 {
7403         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7404         struct wireless_dev *wdev;
7405         struct net_device *dev = info->user_ptr[1];
7406
7407         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7408                 return -EINVAL;
7409
7410         wdev = dev->ieee80211_ptr;
7411
7412         if (!rdev->ops->set_cqm_txe_config)
7413                 return -EOPNOTSUPP;
7414
7415         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7416             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7417                 return -EOPNOTSUPP;
7418
7419         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7420 }
7421
7422 static int nl80211_set_cqm_rssi(struct genl_info *info,
7423                                 s32 threshold, u32 hysteresis)
7424 {
7425         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7426         struct wireless_dev *wdev;
7427         struct net_device *dev = info->user_ptr[1];
7428
7429         if (threshold > 0)
7430                 return -EINVAL;
7431
7432         wdev = dev->ieee80211_ptr;
7433
7434         if (!rdev->ops->set_cqm_rssi_config)
7435                 return -EOPNOTSUPP;
7436
7437         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7438             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7439                 return -EOPNOTSUPP;
7440
7441         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7442 }
7443
7444 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7445 {
7446         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7447         struct nlattr *cqm;
7448         int err;
7449
7450         cqm = info->attrs[NL80211_ATTR_CQM];
7451         if (!cqm) {
7452                 err = -EINVAL;
7453                 goto out;
7454         }
7455
7456         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7457                                nl80211_attr_cqm_policy);
7458         if (err)
7459                 goto out;
7460
7461         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7462             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7463                 s32 threshold;
7464                 u32 hysteresis;
7465                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7466                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7467                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7468         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7469                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7470                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7471                 u32 rate, pkts, intvl;
7472                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7473                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7474                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7475                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7476         } else
7477                 err = -EINVAL;
7478
7479 out:
7480         return err;
7481 }
7482
7483 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7484 {
7485         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7486         struct net_device *dev = info->user_ptr[1];
7487         struct mesh_config cfg;
7488         struct mesh_setup setup;
7489         int err;
7490
7491         /* start with default */
7492         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7493         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7494
7495         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7496                 /* and parse parameters if given */
7497                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7498                 if (err)
7499                         return err;
7500         }
7501
7502         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7503             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7504                 return -EINVAL;
7505
7506         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7507         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7508
7509         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7510             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7511                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7512                         return -EINVAL;
7513
7514         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7515                 setup.beacon_interval =
7516                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7517                 if (setup.beacon_interval < 10 ||
7518                     setup.beacon_interval > 10000)
7519                         return -EINVAL;
7520         }
7521
7522         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7523                 setup.dtim_period =
7524                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7525                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7526                         return -EINVAL;
7527         }
7528
7529         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7530                 /* parse additional setup parameters if given */
7531                 err = nl80211_parse_mesh_setup(info, &setup);
7532                 if (err)
7533                         return err;
7534         }
7535
7536         if (setup.user_mpm)
7537                 cfg.auto_open_plinks = false;
7538
7539         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7540                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7541                 if (err)
7542                         return err;
7543         } else {
7544                 /* cfg80211_join_mesh() will sort it out */
7545                 setup.chandef.chan = NULL;
7546         }
7547
7548         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7549                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7550                 int n_rates =
7551                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7552                 struct ieee80211_supported_band *sband;
7553
7554                 if (!setup.chandef.chan)
7555                         return -EINVAL;
7556
7557                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7558
7559                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7560                                              &setup.basic_rates);
7561                 if (err)
7562                         return err;
7563         }
7564
7565         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7566 }
7567
7568 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7569 {
7570         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7571         struct net_device *dev = info->user_ptr[1];
7572
7573         return cfg80211_leave_mesh(rdev, dev);
7574 }
7575
7576 #ifdef CONFIG_PM
7577 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7578                                         struct cfg80211_registered_device *rdev)
7579 {
7580         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7581         struct nlattr *nl_pats, *nl_pat;
7582         int i, pat_len;
7583
7584         if (!wowlan->n_patterns)
7585                 return 0;
7586
7587         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7588         if (!nl_pats)
7589                 return -ENOBUFS;
7590
7591         for (i = 0; i < wowlan->n_patterns; i++) {
7592                 nl_pat = nla_nest_start(msg, i + 1);
7593                 if (!nl_pat)
7594                         return -ENOBUFS;
7595                 pat_len = wowlan->patterns[i].pattern_len;
7596                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7597                             DIV_ROUND_UP(pat_len, 8),
7598                             wowlan->patterns[i].mask) ||
7599                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7600                             pat_len, wowlan->patterns[i].pattern) ||
7601                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7602                                 wowlan->patterns[i].pkt_offset))
7603                         return -ENOBUFS;
7604                 nla_nest_end(msg, nl_pat);
7605         }
7606         nla_nest_end(msg, nl_pats);
7607
7608         return 0;
7609 }
7610
7611 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7612                                    struct cfg80211_wowlan_tcp *tcp)
7613 {
7614         struct nlattr *nl_tcp;
7615
7616         if (!tcp)
7617                 return 0;
7618
7619         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7620         if (!nl_tcp)
7621                 return -ENOBUFS;
7622
7623         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7624             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7625             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7626             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7627             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7628             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7629                     tcp->payload_len, tcp->payload) ||
7630             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7631                         tcp->data_interval) ||
7632             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7633                     tcp->wake_len, tcp->wake_data) ||
7634             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7635                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7636                 return -ENOBUFS;
7637
7638         if (tcp->payload_seq.len &&
7639             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7640                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7641                 return -ENOBUFS;
7642
7643         if (tcp->payload_tok.len &&
7644             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7645                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7646                     &tcp->payload_tok))
7647                 return -ENOBUFS;
7648
7649         nla_nest_end(msg, nl_tcp);
7650
7651         return 0;
7652 }
7653
7654 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7655 {
7656         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7657         struct sk_buff *msg;
7658         void *hdr;
7659         u32 size = NLMSG_DEFAULT_SIZE;
7660
7661         if (!rdev->wiphy.wowlan)
7662                 return -EOPNOTSUPP;
7663
7664         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7665                 /* adjust size to have room for all the data */
7666                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7667                         rdev->wiphy.wowlan_config->tcp->payload_len +
7668                         rdev->wiphy.wowlan_config->tcp->wake_len +
7669                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7670         }
7671
7672         msg = nlmsg_new(size, GFP_KERNEL);
7673         if (!msg)
7674                 return -ENOMEM;
7675
7676         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7677                              NL80211_CMD_GET_WOWLAN);
7678         if (!hdr)
7679                 goto nla_put_failure;
7680
7681         if (rdev->wiphy.wowlan_config) {
7682                 struct nlattr *nl_wowlan;
7683
7684                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7685                 if (!nl_wowlan)
7686                         goto nla_put_failure;
7687
7688                 if ((rdev->wiphy.wowlan_config->any &&
7689                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7690                     (rdev->wiphy.wowlan_config->disconnect &&
7691                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7692                     (rdev->wiphy.wowlan_config->magic_pkt &&
7693                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7694                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7695                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7696                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7697                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7698                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7699                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7700                     (rdev->wiphy.wowlan_config->rfkill_release &&
7701                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7702                         goto nla_put_failure;
7703
7704                 if (nl80211_send_wowlan_patterns(msg, rdev))
7705                         goto nla_put_failure;
7706
7707                 if (nl80211_send_wowlan_tcp(msg,
7708                                             rdev->wiphy.wowlan_config->tcp))
7709                         goto nla_put_failure;
7710
7711                 nla_nest_end(msg, nl_wowlan);
7712         }
7713
7714         genlmsg_end(msg, hdr);
7715         return genlmsg_reply(msg, info);
7716
7717 nla_put_failure:
7718         nlmsg_free(msg);
7719         return -ENOBUFS;
7720 }
7721
7722 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7723                                     struct nlattr *attr,
7724                                     struct cfg80211_wowlan *trig)
7725 {
7726         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7727         struct cfg80211_wowlan_tcp *cfg;
7728         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7729         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7730         u32 size;
7731         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7732         int err, port;
7733
7734         if (!rdev->wiphy.wowlan->tcp)
7735                 return -EINVAL;
7736
7737         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7738                         nla_data(attr), nla_len(attr),
7739                         nl80211_wowlan_tcp_policy);
7740         if (err)
7741                 return err;
7742
7743         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7744             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7745             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7746             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7747             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7748             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7749             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7750             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7751                 return -EINVAL;
7752
7753         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7754         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
7755                 return -EINVAL;
7756
7757         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7758                         rdev->wiphy.wowlan->tcp->data_interval_max ||
7759             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
7760                 return -EINVAL;
7761
7762         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7763         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
7764                 return -EINVAL;
7765
7766         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7767         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7768                 return -EINVAL;
7769
7770         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7771                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7772
7773                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7774                 tokens_size = tokln - sizeof(*tok);
7775
7776                 if (!tok->len || tokens_size % tok->len)
7777                         return -EINVAL;
7778                 if (!rdev->wiphy.wowlan->tcp->tok)
7779                         return -EINVAL;
7780                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
7781                         return -EINVAL;
7782                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
7783                         return -EINVAL;
7784                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
7785                         return -EINVAL;
7786                 if (tok->offset + tok->len > data_size)
7787                         return -EINVAL;
7788         }
7789
7790         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7791                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7792                 if (!rdev->wiphy.wowlan->tcp->seq)
7793                         return -EINVAL;
7794                 if (seq->len == 0 || seq->len > 4)
7795                         return -EINVAL;
7796                 if (seq->len + seq->offset > data_size)
7797                         return -EINVAL;
7798         }
7799
7800         size = sizeof(*cfg);
7801         size += data_size;
7802         size += wake_size + wake_mask_size;
7803         size += tokens_size;
7804
7805         cfg = kzalloc(size, GFP_KERNEL);
7806         if (!cfg)
7807                 return -ENOMEM;
7808         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7809         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7810         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7811                ETH_ALEN);
7812         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7813                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7814         else
7815                 port = 0;
7816 #ifdef CONFIG_INET
7817         /* allocate a socket and port for it and use it */
7818         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7819                             IPPROTO_TCP, &cfg->sock, 1);
7820         if (err) {
7821                 kfree(cfg);
7822                 return err;
7823         }
7824         if (inet_csk_get_port(cfg->sock->sk, port)) {
7825                 sock_release(cfg->sock);
7826                 kfree(cfg);
7827                 return -EADDRINUSE;
7828         }
7829         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7830 #else
7831         if (!port) {
7832                 kfree(cfg);
7833                 return -EINVAL;
7834         }
7835         cfg->src_port = port;
7836 #endif
7837
7838         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7839         cfg->payload_len = data_size;
7840         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7841         memcpy((void *)cfg->payload,
7842                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7843                data_size);
7844         if (seq)
7845                 cfg->payload_seq = *seq;
7846         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7847         cfg->wake_len = wake_size;
7848         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7849         memcpy((void *)cfg->wake_data,
7850                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7851                wake_size);
7852         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7853                          data_size + wake_size;
7854         memcpy((void *)cfg->wake_mask,
7855                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7856                wake_mask_size);
7857         if (tok) {
7858                 cfg->tokens_size = tokens_size;
7859                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7860         }
7861
7862         trig->tcp = cfg;
7863
7864         return 0;
7865 }
7866
7867 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7868 {
7869         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7870         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7871         struct cfg80211_wowlan new_triggers = {};
7872         struct cfg80211_wowlan *ntrig;
7873         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
7874         int err, i;
7875         bool prev_enabled = rdev->wiphy.wowlan_config;
7876
7877         if (!wowlan)
7878                 return -EOPNOTSUPP;
7879
7880         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7881                 cfg80211_rdev_free_wowlan(rdev);
7882                 rdev->wiphy.wowlan_config = NULL;
7883                 goto set_wakeup;
7884         }
7885
7886         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7887                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7888                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7889                         nl80211_wowlan_policy);
7890         if (err)
7891                 return err;
7892
7893         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7894                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7895                         return -EINVAL;
7896                 new_triggers.any = true;
7897         }
7898
7899         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7900                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7901                         return -EINVAL;
7902                 new_triggers.disconnect = true;
7903         }
7904
7905         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7906                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7907                         return -EINVAL;
7908                 new_triggers.magic_pkt = true;
7909         }
7910
7911         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7912                 return -EINVAL;
7913
7914         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7915                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7916                         return -EINVAL;
7917                 new_triggers.gtk_rekey_failure = true;
7918         }
7919
7920         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7921                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7922                         return -EINVAL;
7923                 new_triggers.eap_identity_req = true;
7924         }
7925
7926         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7927                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7928                         return -EINVAL;
7929                 new_triggers.four_way_handshake = true;
7930         }
7931
7932         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7933                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7934                         return -EINVAL;
7935                 new_triggers.rfkill_release = true;
7936         }
7937
7938         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7939                 struct nlattr *pat;
7940                 int n_patterns = 0;
7941                 int rem, pat_len, mask_len, pkt_offset;
7942                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7943
7944                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7945                                     rem)
7946                         n_patterns++;
7947                 if (n_patterns > wowlan->n_patterns)
7948                         return -EINVAL;
7949
7950                 new_triggers.patterns = kcalloc(n_patterns,
7951                                                 sizeof(new_triggers.patterns[0]),
7952                                                 GFP_KERNEL);
7953                 if (!new_triggers.patterns)
7954                         return -ENOMEM;
7955
7956                 new_triggers.n_patterns = n_patterns;
7957                 i = 0;
7958
7959                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7960                                     rem) {
7961                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7962                                   nla_data(pat), nla_len(pat), NULL);
7963                         err = -EINVAL;
7964                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7965                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7966                                 goto error;
7967                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7968                         mask_len = DIV_ROUND_UP(pat_len, 8);
7969                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7970                             mask_len)
7971                                 goto error;
7972                         if (pat_len > wowlan->pattern_max_len ||
7973                             pat_len < wowlan->pattern_min_len)
7974                                 goto error;
7975
7976                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7977                                 pkt_offset = 0;
7978                         else
7979                                 pkt_offset = nla_get_u32(
7980                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7981                         if (pkt_offset > wowlan->max_pkt_offset)
7982                                 goto error;
7983                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7984
7985                         new_triggers.patterns[i].mask =
7986                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7987                         if (!new_triggers.patterns[i].mask) {
7988                                 err = -ENOMEM;
7989                                 goto error;
7990                         }
7991                         new_triggers.patterns[i].pattern =
7992                                 new_triggers.patterns[i].mask + mask_len;
7993                         memcpy(new_triggers.patterns[i].mask,
7994                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7995                                mask_len);
7996                         new_triggers.patterns[i].pattern_len = pat_len;
7997                         memcpy(new_triggers.patterns[i].pattern,
7998                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7999                                pat_len);
8000                         i++;
8001                 }
8002         }
8003
8004         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8005                 err = nl80211_parse_wowlan_tcp(
8006                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8007                         &new_triggers);
8008                 if (err)
8009                         goto error;
8010         }
8011
8012         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8013         if (!ntrig) {
8014                 err = -ENOMEM;
8015                 goto error;
8016         }
8017         cfg80211_rdev_free_wowlan(rdev);
8018         rdev->wiphy.wowlan_config = ntrig;
8019
8020  set_wakeup:
8021         if (rdev->ops->set_wakeup &&
8022             prev_enabled != !!rdev->wiphy.wowlan_config)
8023                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8024
8025         return 0;
8026  error:
8027         for (i = 0; i < new_triggers.n_patterns; i++)
8028                 kfree(new_triggers.patterns[i].mask);
8029         kfree(new_triggers.patterns);
8030         if (new_triggers.tcp && new_triggers.tcp->sock)
8031                 sock_release(new_triggers.tcp->sock);
8032         kfree(new_triggers.tcp);
8033         return err;
8034 }
8035 #endif
8036
8037 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8038 {
8039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8040         struct net_device *dev = info->user_ptr[1];
8041         struct wireless_dev *wdev = dev->ieee80211_ptr;
8042         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8043         struct cfg80211_gtk_rekey_data rekey_data;
8044         int err;
8045
8046         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8047                 return -EINVAL;
8048
8049         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8050                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8051                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8052                         nl80211_rekey_policy);
8053         if (err)
8054                 return err;
8055
8056         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8057                 return -ERANGE;
8058         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8059                 return -ERANGE;
8060         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8061                 return -ERANGE;
8062
8063         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8064                NL80211_KEK_LEN);
8065         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8066                NL80211_KCK_LEN);
8067         memcpy(rekey_data.replay_ctr,
8068                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8069                NL80211_REPLAY_CTR_LEN);
8070
8071         wdev_lock(wdev);
8072         if (!wdev->current_bss) {
8073                 err = -ENOTCONN;
8074                 goto out;
8075         }
8076
8077         if (!rdev->ops->set_rekey_data) {
8078                 err = -EOPNOTSUPP;
8079                 goto out;
8080         }
8081
8082         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8083  out:
8084         wdev_unlock(wdev);
8085         return err;
8086 }
8087
8088 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8089                                              struct genl_info *info)
8090 {
8091         struct net_device *dev = info->user_ptr[1];
8092         struct wireless_dev *wdev = dev->ieee80211_ptr;
8093
8094         if (wdev->iftype != NL80211_IFTYPE_AP &&
8095             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8096                 return -EINVAL;
8097
8098         if (wdev->ap_unexpected_nlportid)
8099                 return -EBUSY;
8100
8101         wdev->ap_unexpected_nlportid = info->snd_portid;
8102         return 0;
8103 }
8104
8105 static int nl80211_probe_client(struct sk_buff *skb,
8106                                 struct genl_info *info)
8107 {
8108         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8109         struct net_device *dev = info->user_ptr[1];
8110         struct wireless_dev *wdev = dev->ieee80211_ptr;
8111         struct sk_buff *msg;
8112         void *hdr;
8113         const u8 *addr;
8114         u64 cookie;
8115         int err;
8116
8117         if (wdev->iftype != NL80211_IFTYPE_AP &&
8118             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8119                 return -EOPNOTSUPP;
8120
8121         if (!info->attrs[NL80211_ATTR_MAC])
8122                 return -EINVAL;
8123
8124         if (!rdev->ops->probe_client)
8125                 return -EOPNOTSUPP;
8126
8127         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8128         if (!msg)
8129                 return -ENOMEM;
8130
8131         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8132                              NL80211_CMD_PROBE_CLIENT);
8133
8134         if (IS_ERR(hdr)) {
8135                 err = PTR_ERR(hdr);
8136                 goto free_msg;
8137         }
8138
8139         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8140
8141         err = rdev_probe_client(rdev, dev, addr, &cookie);
8142         if (err)
8143                 goto free_msg;
8144
8145         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8146                 goto nla_put_failure;
8147
8148         genlmsg_end(msg, hdr);
8149
8150         return genlmsg_reply(msg, info);
8151
8152  nla_put_failure:
8153         err = -ENOBUFS;
8154  free_msg:
8155         nlmsg_free(msg);
8156         return err;
8157 }
8158
8159 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8160 {
8161         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8162         struct cfg80211_beacon_registration *reg, *nreg;
8163         int rv;
8164
8165         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8166                 return -EOPNOTSUPP;
8167
8168         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8169         if (!nreg)
8170                 return -ENOMEM;
8171
8172         /* First, check if already registered. */
8173         spin_lock_bh(&rdev->beacon_registrations_lock);
8174         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8175                 if (reg->nlportid == info->snd_portid) {
8176                         rv = -EALREADY;
8177                         goto out_err;
8178                 }
8179         }
8180         /* Add it to the list */
8181         nreg->nlportid = info->snd_portid;
8182         list_add(&nreg->list, &rdev->beacon_registrations);
8183
8184         spin_unlock_bh(&rdev->beacon_registrations_lock);
8185
8186         return 0;
8187 out_err:
8188         spin_unlock_bh(&rdev->beacon_registrations_lock);
8189         kfree(nreg);
8190         return rv;
8191 }
8192
8193 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8194 {
8195         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8196         struct wireless_dev *wdev = info->user_ptr[1];
8197         int err;
8198
8199         if (!rdev->ops->start_p2p_device)
8200                 return -EOPNOTSUPP;
8201
8202         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8203                 return -EOPNOTSUPP;
8204
8205         if (wdev->p2p_started)
8206                 return 0;
8207
8208         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8209         if (err)
8210                 return err;
8211
8212         err = rdev_start_p2p_device(rdev, wdev);
8213         if (err)
8214                 return err;
8215
8216         wdev->p2p_started = true;
8217         rdev->opencount++;
8218
8219         return 0;
8220 }
8221
8222 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8223 {
8224         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8225         struct wireless_dev *wdev = info->user_ptr[1];
8226
8227         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8228                 return -EOPNOTSUPP;
8229
8230         if (!rdev->ops->stop_p2p_device)
8231                 return -EOPNOTSUPP;
8232
8233         cfg80211_stop_p2p_device(rdev, wdev);
8234
8235         return 0;
8236 }
8237
8238 static int nl80211_get_protocol_features(struct sk_buff *skb,
8239                                          struct genl_info *info)
8240 {
8241         void *hdr;
8242         struct sk_buff *msg;
8243
8244         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8245         if (!msg)
8246                 return -ENOMEM;
8247
8248         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8249                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8250         if (!hdr)
8251                 goto nla_put_failure;
8252
8253         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8254                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8255                 goto nla_put_failure;
8256
8257         genlmsg_end(msg, hdr);
8258         return genlmsg_reply(msg, info);
8259
8260  nla_put_failure:
8261         kfree_skb(msg);
8262         return -ENOBUFS;
8263 }
8264
8265 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8266 {
8267         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8268         struct cfg80211_update_ft_ies_params ft_params;
8269         struct net_device *dev = info->user_ptr[1];
8270
8271         if (!rdev->ops->update_ft_ies)
8272                 return -EOPNOTSUPP;
8273
8274         if (!info->attrs[NL80211_ATTR_MDID] ||
8275             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8276                 return -EINVAL;
8277
8278         memset(&ft_params, 0, sizeof(ft_params));
8279         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8280         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8281         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8282
8283         return rdev_update_ft_ies(rdev, dev, &ft_params);
8284 }
8285
8286 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8287                                        struct genl_info *info)
8288 {
8289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8290         struct wireless_dev *wdev = info->user_ptr[1];
8291         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8292         u16 duration;
8293         int ret;
8294
8295         if (!rdev->ops->crit_proto_start)
8296                 return -EOPNOTSUPP;
8297
8298         if (WARN_ON(!rdev->ops->crit_proto_stop))
8299                 return -EINVAL;
8300
8301         if (rdev->crit_proto_nlportid)
8302                 return -EBUSY;
8303
8304         /* determine protocol if provided */
8305         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8306                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8307
8308         if (proto >= NUM_NL80211_CRIT_PROTO)
8309                 return -EINVAL;
8310
8311         /* timeout must be provided */
8312         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8313                 return -EINVAL;
8314
8315         duration =
8316                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8317
8318         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8319                 return -ERANGE;
8320
8321         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8322         if (!ret)
8323                 rdev->crit_proto_nlportid = info->snd_portid;
8324
8325         return ret;
8326 }
8327
8328 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8329                                       struct genl_info *info)
8330 {
8331         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8332         struct wireless_dev *wdev = info->user_ptr[1];
8333
8334         if (!rdev->ops->crit_proto_stop)
8335                 return -EOPNOTSUPP;
8336
8337         if (rdev->crit_proto_nlportid) {
8338                 rdev->crit_proto_nlportid = 0;
8339                 rdev_crit_proto_stop(rdev, wdev);
8340         }
8341         return 0;
8342 }
8343
8344 #define NL80211_FLAG_NEED_WIPHY         0x01
8345 #define NL80211_FLAG_NEED_NETDEV        0x02
8346 #define NL80211_FLAG_NEED_RTNL          0x04
8347 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8348 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8349                                          NL80211_FLAG_CHECK_NETDEV_UP)
8350 #define NL80211_FLAG_NEED_WDEV          0x10
8351 /* If a netdev is associated, it must be UP, P2P must be started */
8352 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8353                                          NL80211_FLAG_CHECK_NETDEV_UP)
8354
8355 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8356                             struct genl_info *info)
8357 {
8358         struct cfg80211_registered_device *rdev;
8359         struct wireless_dev *wdev;
8360         struct net_device *dev;
8361         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8362
8363         if (rtnl)
8364                 rtnl_lock();
8365
8366         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8367                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8368                 if (IS_ERR(rdev)) {
8369                         if (rtnl)
8370                                 rtnl_unlock();
8371                         return PTR_ERR(rdev);
8372                 }
8373                 info->user_ptr[0] = rdev;
8374         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8375                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8376                 ASSERT_RTNL();
8377
8378                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8379                                                   info->attrs);
8380                 if (IS_ERR(wdev)) {
8381                         if (rtnl)
8382                                 rtnl_unlock();
8383                         return PTR_ERR(wdev);
8384                 }
8385
8386                 dev = wdev->netdev;
8387                 rdev = wiphy_to_dev(wdev->wiphy);
8388
8389                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8390                         if (!dev) {
8391                                 if (rtnl)
8392                                         rtnl_unlock();
8393                                 return -EINVAL;
8394                         }
8395
8396                         info->user_ptr[1] = dev;
8397                 } else {
8398                         info->user_ptr[1] = wdev;
8399                 }
8400
8401                 if (dev) {
8402                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8403                             !netif_running(dev)) {
8404                                 if (rtnl)
8405                                         rtnl_unlock();
8406                                 return -ENETDOWN;
8407                         }
8408
8409                         dev_hold(dev);
8410                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8411                         if (!wdev->p2p_started) {
8412                                 if (rtnl)
8413                                         rtnl_unlock();
8414                                 return -ENETDOWN;
8415                         }
8416                 }
8417
8418                 info->user_ptr[0] = rdev;
8419         }
8420
8421         return 0;
8422 }
8423
8424 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8425                               struct genl_info *info)
8426 {
8427         if (info->user_ptr[1]) {
8428                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8429                         struct wireless_dev *wdev = info->user_ptr[1];
8430
8431                         if (wdev->netdev)
8432                                 dev_put(wdev->netdev);
8433                 } else {
8434                         dev_put(info->user_ptr[1]);
8435                 }
8436         }
8437         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8438                 rtnl_unlock();
8439 }
8440
8441 static struct genl_ops nl80211_ops[] = {
8442         {
8443                 .cmd = NL80211_CMD_GET_WIPHY,
8444                 .doit = nl80211_get_wiphy,
8445                 .dumpit = nl80211_dump_wiphy,
8446                 .done = nl80211_dump_wiphy_done,
8447                 .policy = nl80211_policy,
8448                 /* can be retrieved by unprivileged users */
8449                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8450                                   NL80211_FLAG_NEED_RTNL,
8451         },
8452         {
8453                 .cmd = NL80211_CMD_SET_WIPHY,
8454                 .doit = nl80211_set_wiphy,
8455                 .policy = nl80211_policy,
8456                 .flags = GENL_ADMIN_PERM,
8457                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8458         },
8459         {
8460                 .cmd = NL80211_CMD_GET_INTERFACE,
8461                 .doit = nl80211_get_interface,
8462                 .dumpit = nl80211_dump_interface,
8463                 .policy = nl80211_policy,
8464                 /* can be retrieved by unprivileged users */
8465                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8466                                   NL80211_FLAG_NEED_RTNL,
8467         },
8468         {
8469                 .cmd = NL80211_CMD_SET_INTERFACE,
8470                 .doit = nl80211_set_interface,
8471                 .policy = nl80211_policy,
8472                 .flags = GENL_ADMIN_PERM,
8473                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8474                                   NL80211_FLAG_NEED_RTNL,
8475         },
8476         {
8477                 .cmd = NL80211_CMD_NEW_INTERFACE,
8478                 .doit = nl80211_new_interface,
8479                 .policy = nl80211_policy,
8480                 .flags = GENL_ADMIN_PERM,
8481                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8482                                   NL80211_FLAG_NEED_RTNL,
8483         },
8484         {
8485                 .cmd = NL80211_CMD_DEL_INTERFACE,
8486                 .doit = nl80211_del_interface,
8487                 .policy = nl80211_policy,
8488                 .flags = GENL_ADMIN_PERM,
8489                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8490                                   NL80211_FLAG_NEED_RTNL,
8491         },
8492         {
8493                 .cmd = NL80211_CMD_GET_KEY,
8494                 .doit = nl80211_get_key,
8495                 .policy = nl80211_policy,
8496                 .flags = GENL_ADMIN_PERM,
8497                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8498                                   NL80211_FLAG_NEED_RTNL,
8499         },
8500         {
8501                 .cmd = NL80211_CMD_SET_KEY,
8502                 .doit = nl80211_set_key,
8503                 .policy = nl80211_policy,
8504                 .flags = GENL_ADMIN_PERM,
8505                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8506                                   NL80211_FLAG_NEED_RTNL,
8507         },
8508         {
8509                 .cmd = NL80211_CMD_NEW_KEY,
8510                 .doit = nl80211_new_key,
8511                 .policy = nl80211_policy,
8512                 .flags = GENL_ADMIN_PERM,
8513                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8514                                   NL80211_FLAG_NEED_RTNL,
8515         },
8516         {
8517                 .cmd = NL80211_CMD_DEL_KEY,
8518                 .doit = nl80211_del_key,
8519                 .policy = nl80211_policy,
8520                 .flags = GENL_ADMIN_PERM,
8521                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8522                                   NL80211_FLAG_NEED_RTNL,
8523         },
8524         {
8525                 .cmd = NL80211_CMD_SET_BEACON,
8526                 .policy = nl80211_policy,
8527                 .flags = GENL_ADMIN_PERM,
8528                 .doit = nl80211_set_beacon,
8529                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8530                                   NL80211_FLAG_NEED_RTNL,
8531         },
8532         {
8533                 .cmd = NL80211_CMD_START_AP,
8534                 .policy = nl80211_policy,
8535                 .flags = GENL_ADMIN_PERM,
8536                 .doit = nl80211_start_ap,
8537                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8538                                   NL80211_FLAG_NEED_RTNL,
8539         },
8540         {
8541                 .cmd = NL80211_CMD_STOP_AP,
8542                 .policy = nl80211_policy,
8543                 .flags = GENL_ADMIN_PERM,
8544                 .doit = nl80211_stop_ap,
8545                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8546                                   NL80211_FLAG_NEED_RTNL,
8547         },
8548         {
8549                 .cmd = NL80211_CMD_GET_STATION,
8550                 .doit = nl80211_get_station,
8551                 .dumpit = nl80211_dump_station,
8552                 .policy = nl80211_policy,
8553                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8554                                   NL80211_FLAG_NEED_RTNL,
8555         },
8556         {
8557                 .cmd = NL80211_CMD_SET_STATION,
8558                 .doit = nl80211_set_station,
8559                 .policy = nl80211_policy,
8560                 .flags = GENL_ADMIN_PERM,
8561                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8562                                   NL80211_FLAG_NEED_RTNL,
8563         },
8564         {
8565                 .cmd = NL80211_CMD_NEW_STATION,
8566                 .doit = nl80211_new_station,
8567                 .policy = nl80211_policy,
8568                 .flags = GENL_ADMIN_PERM,
8569                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8570                                   NL80211_FLAG_NEED_RTNL,
8571         },
8572         {
8573                 .cmd = NL80211_CMD_DEL_STATION,
8574                 .doit = nl80211_del_station,
8575                 .policy = nl80211_policy,
8576                 .flags = GENL_ADMIN_PERM,
8577                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8578                                   NL80211_FLAG_NEED_RTNL,
8579         },
8580         {
8581                 .cmd = NL80211_CMD_GET_MPATH,
8582                 .doit = nl80211_get_mpath,
8583                 .dumpit = nl80211_dump_mpath,
8584                 .policy = nl80211_policy,
8585                 .flags = GENL_ADMIN_PERM,
8586                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8587                                   NL80211_FLAG_NEED_RTNL,
8588         },
8589         {
8590                 .cmd = NL80211_CMD_SET_MPATH,
8591                 .doit = nl80211_set_mpath,
8592                 .policy = nl80211_policy,
8593                 .flags = GENL_ADMIN_PERM,
8594                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8595                                   NL80211_FLAG_NEED_RTNL,
8596         },
8597         {
8598                 .cmd = NL80211_CMD_NEW_MPATH,
8599                 .doit = nl80211_new_mpath,
8600                 .policy = nl80211_policy,
8601                 .flags = GENL_ADMIN_PERM,
8602                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8603                                   NL80211_FLAG_NEED_RTNL,
8604         },
8605         {
8606                 .cmd = NL80211_CMD_DEL_MPATH,
8607                 .doit = nl80211_del_mpath,
8608                 .policy = nl80211_policy,
8609                 .flags = GENL_ADMIN_PERM,
8610                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8611                                   NL80211_FLAG_NEED_RTNL,
8612         },
8613         {
8614                 .cmd = NL80211_CMD_SET_BSS,
8615                 .doit = nl80211_set_bss,
8616                 .policy = nl80211_policy,
8617                 .flags = GENL_ADMIN_PERM,
8618                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8619                                   NL80211_FLAG_NEED_RTNL,
8620         },
8621         {
8622                 .cmd = NL80211_CMD_GET_REG,
8623                 .doit = nl80211_get_reg,
8624                 .policy = nl80211_policy,
8625                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8626                 /* can be retrieved by unprivileged users */
8627         },
8628         {
8629                 .cmd = NL80211_CMD_SET_REG,
8630                 .doit = nl80211_set_reg,
8631                 .policy = nl80211_policy,
8632                 .flags = GENL_ADMIN_PERM,
8633                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8634         },
8635         {
8636                 .cmd = NL80211_CMD_REQ_SET_REG,
8637                 .doit = nl80211_req_set_reg,
8638                 .policy = nl80211_policy,
8639                 .flags = GENL_ADMIN_PERM,
8640         },
8641         {
8642                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8643                 .doit = nl80211_get_mesh_config,
8644                 .policy = nl80211_policy,
8645                 /* can be retrieved by unprivileged users */
8646                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8647                                   NL80211_FLAG_NEED_RTNL,
8648         },
8649         {
8650                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8651                 .doit = nl80211_update_mesh_config,
8652                 .policy = nl80211_policy,
8653                 .flags = GENL_ADMIN_PERM,
8654                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8655                                   NL80211_FLAG_NEED_RTNL,
8656         },
8657         {
8658                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8659                 .doit = nl80211_trigger_scan,
8660                 .policy = nl80211_policy,
8661                 .flags = GENL_ADMIN_PERM,
8662                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8663                                   NL80211_FLAG_NEED_RTNL,
8664         },
8665         {
8666                 .cmd = NL80211_CMD_GET_SCAN,
8667                 .policy = nl80211_policy,
8668                 .dumpit = nl80211_dump_scan,
8669         },
8670         {
8671                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8672                 .doit = nl80211_start_sched_scan,
8673                 .policy = nl80211_policy,
8674                 .flags = GENL_ADMIN_PERM,
8675                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8676                                   NL80211_FLAG_NEED_RTNL,
8677         },
8678         {
8679                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8680                 .doit = nl80211_stop_sched_scan,
8681                 .policy = nl80211_policy,
8682                 .flags = GENL_ADMIN_PERM,
8683                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8684                                   NL80211_FLAG_NEED_RTNL,
8685         },
8686         {
8687                 .cmd = NL80211_CMD_AUTHENTICATE,
8688                 .doit = nl80211_authenticate,
8689                 .policy = nl80211_policy,
8690                 .flags = GENL_ADMIN_PERM,
8691                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8692                                   NL80211_FLAG_NEED_RTNL,
8693         },
8694         {
8695                 .cmd = NL80211_CMD_ASSOCIATE,
8696                 .doit = nl80211_associate,
8697                 .policy = nl80211_policy,
8698                 .flags = GENL_ADMIN_PERM,
8699                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8700                                   NL80211_FLAG_NEED_RTNL,
8701         },
8702         {
8703                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8704                 .doit = nl80211_deauthenticate,
8705                 .policy = nl80211_policy,
8706                 .flags = GENL_ADMIN_PERM,
8707                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8708                                   NL80211_FLAG_NEED_RTNL,
8709         },
8710         {
8711                 .cmd = NL80211_CMD_DISASSOCIATE,
8712                 .doit = nl80211_disassociate,
8713                 .policy = nl80211_policy,
8714                 .flags = GENL_ADMIN_PERM,
8715                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8716                                   NL80211_FLAG_NEED_RTNL,
8717         },
8718         {
8719                 .cmd = NL80211_CMD_JOIN_IBSS,
8720                 .doit = nl80211_join_ibss,
8721                 .policy = nl80211_policy,
8722                 .flags = GENL_ADMIN_PERM,
8723                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8724                                   NL80211_FLAG_NEED_RTNL,
8725         },
8726         {
8727                 .cmd = NL80211_CMD_LEAVE_IBSS,
8728                 .doit = nl80211_leave_ibss,
8729                 .policy = nl80211_policy,
8730                 .flags = GENL_ADMIN_PERM,
8731                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8732                                   NL80211_FLAG_NEED_RTNL,
8733         },
8734 #ifdef CONFIG_NL80211_TESTMODE
8735         {
8736                 .cmd = NL80211_CMD_TESTMODE,
8737                 .doit = nl80211_testmode_do,
8738                 .dumpit = nl80211_testmode_dump,
8739                 .policy = nl80211_policy,
8740                 .flags = GENL_ADMIN_PERM,
8741                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8742                                   NL80211_FLAG_NEED_RTNL,
8743         },
8744 #endif
8745         {
8746                 .cmd = NL80211_CMD_CONNECT,
8747                 .doit = nl80211_connect,
8748                 .policy = nl80211_policy,
8749                 .flags = GENL_ADMIN_PERM,
8750                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8751                                   NL80211_FLAG_NEED_RTNL,
8752         },
8753         {
8754                 .cmd = NL80211_CMD_DISCONNECT,
8755                 .doit = nl80211_disconnect,
8756                 .policy = nl80211_policy,
8757                 .flags = GENL_ADMIN_PERM,
8758                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8759                                   NL80211_FLAG_NEED_RTNL,
8760         },
8761         {
8762                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8763                 .doit = nl80211_wiphy_netns,
8764                 .policy = nl80211_policy,
8765                 .flags = GENL_ADMIN_PERM,
8766                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8767                                   NL80211_FLAG_NEED_RTNL,
8768         },
8769         {
8770                 .cmd = NL80211_CMD_GET_SURVEY,
8771                 .policy = nl80211_policy,
8772                 .dumpit = nl80211_dump_survey,
8773         },
8774         {
8775                 .cmd = NL80211_CMD_SET_PMKSA,
8776                 .doit = nl80211_setdel_pmksa,
8777                 .policy = nl80211_policy,
8778                 .flags = GENL_ADMIN_PERM,
8779                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8780                                   NL80211_FLAG_NEED_RTNL,
8781         },
8782         {
8783                 .cmd = NL80211_CMD_DEL_PMKSA,
8784                 .doit = nl80211_setdel_pmksa,
8785                 .policy = nl80211_policy,
8786                 .flags = GENL_ADMIN_PERM,
8787                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8788                                   NL80211_FLAG_NEED_RTNL,
8789         },
8790         {
8791                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8792                 .doit = nl80211_flush_pmksa,
8793                 .policy = nl80211_policy,
8794                 .flags = GENL_ADMIN_PERM,
8795                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8796                                   NL80211_FLAG_NEED_RTNL,
8797         },
8798         {
8799                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8800                 .doit = nl80211_remain_on_channel,
8801                 .policy = nl80211_policy,
8802                 .flags = GENL_ADMIN_PERM,
8803                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8804                                   NL80211_FLAG_NEED_RTNL,
8805         },
8806         {
8807                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8808                 .doit = nl80211_cancel_remain_on_channel,
8809                 .policy = nl80211_policy,
8810                 .flags = GENL_ADMIN_PERM,
8811                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8812                                   NL80211_FLAG_NEED_RTNL,
8813         },
8814         {
8815                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8816                 .doit = nl80211_set_tx_bitrate_mask,
8817                 .policy = nl80211_policy,
8818                 .flags = GENL_ADMIN_PERM,
8819                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8820                                   NL80211_FLAG_NEED_RTNL,
8821         },
8822         {
8823                 .cmd = NL80211_CMD_REGISTER_FRAME,
8824                 .doit = nl80211_register_mgmt,
8825                 .policy = nl80211_policy,
8826                 .flags = GENL_ADMIN_PERM,
8827                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8828                                   NL80211_FLAG_NEED_RTNL,
8829         },
8830         {
8831                 .cmd = NL80211_CMD_FRAME,
8832                 .doit = nl80211_tx_mgmt,
8833                 .policy = nl80211_policy,
8834                 .flags = GENL_ADMIN_PERM,
8835                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8836                                   NL80211_FLAG_NEED_RTNL,
8837         },
8838         {
8839                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8840                 .doit = nl80211_tx_mgmt_cancel_wait,
8841                 .policy = nl80211_policy,
8842                 .flags = GENL_ADMIN_PERM,
8843                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8844                                   NL80211_FLAG_NEED_RTNL,
8845         },
8846         {
8847                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8848                 .doit = nl80211_set_power_save,
8849                 .policy = nl80211_policy,
8850                 .flags = GENL_ADMIN_PERM,
8851                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8852                                   NL80211_FLAG_NEED_RTNL,
8853         },
8854         {
8855                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8856                 .doit = nl80211_get_power_save,
8857                 .policy = nl80211_policy,
8858                 /* can be retrieved by unprivileged users */
8859                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8860                                   NL80211_FLAG_NEED_RTNL,
8861         },
8862         {
8863                 .cmd = NL80211_CMD_SET_CQM,
8864                 .doit = nl80211_set_cqm,
8865                 .policy = nl80211_policy,
8866                 .flags = GENL_ADMIN_PERM,
8867                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8868                                   NL80211_FLAG_NEED_RTNL,
8869         },
8870         {
8871                 .cmd = NL80211_CMD_SET_CHANNEL,
8872                 .doit = nl80211_set_channel,
8873                 .policy = nl80211_policy,
8874                 .flags = GENL_ADMIN_PERM,
8875                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8876                                   NL80211_FLAG_NEED_RTNL,
8877         },
8878         {
8879                 .cmd = NL80211_CMD_SET_WDS_PEER,
8880                 .doit = nl80211_set_wds_peer,
8881                 .policy = nl80211_policy,
8882                 .flags = GENL_ADMIN_PERM,
8883                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8884                                   NL80211_FLAG_NEED_RTNL,
8885         },
8886         {
8887                 .cmd = NL80211_CMD_JOIN_MESH,
8888                 .doit = nl80211_join_mesh,
8889                 .policy = nl80211_policy,
8890                 .flags = GENL_ADMIN_PERM,
8891                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8892                                   NL80211_FLAG_NEED_RTNL,
8893         },
8894         {
8895                 .cmd = NL80211_CMD_LEAVE_MESH,
8896                 .doit = nl80211_leave_mesh,
8897                 .policy = nl80211_policy,
8898                 .flags = GENL_ADMIN_PERM,
8899                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8900                                   NL80211_FLAG_NEED_RTNL,
8901         },
8902 #ifdef CONFIG_PM
8903         {
8904                 .cmd = NL80211_CMD_GET_WOWLAN,
8905                 .doit = nl80211_get_wowlan,
8906                 .policy = nl80211_policy,
8907                 /* can be retrieved by unprivileged users */
8908                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8909                                   NL80211_FLAG_NEED_RTNL,
8910         },
8911         {
8912                 .cmd = NL80211_CMD_SET_WOWLAN,
8913                 .doit = nl80211_set_wowlan,
8914                 .policy = nl80211_policy,
8915                 .flags = GENL_ADMIN_PERM,
8916                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8917                                   NL80211_FLAG_NEED_RTNL,
8918         },
8919 #endif
8920         {
8921                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8922                 .doit = nl80211_set_rekey_data,
8923                 .policy = nl80211_policy,
8924                 .flags = GENL_ADMIN_PERM,
8925                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8926                                   NL80211_FLAG_NEED_RTNL,
8927         },
8928         {
8929                 .cmd = NL80211_CMD_TDLS_MGMT,
8930                 .doit = nl80211_tdls_mgmt,
8931                 .policy = nl80211_policy,
8932                 .flags = GENL_ADMIN_PERM,
8933                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8934                                   NL80211_FLAG_NEED_RTNL,
8935         },
8936         {
8937                 .cmd = NL80211_CMD_TDLS_OPER,
8938                 .doit = nl80211_tdls_oper,
8939                 .policy = nl80211_policy,
8940                 .flags = GENL_ADMIN_PERM,
8941                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8942                                   NL80211_FLAG_NEED_RTNL,
8943         },
8944         {
8945                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8946                 .doit = nl80211_register_unexpected_frame,
8947                 .policy = nl80211_policy,
8948                 .flags = GENL_ADMIN_PERM,
8949                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8950                                   NL80211_FLAG_NEED_RTNL,
8951         },
8952         {
8953                 .cmd = NL80211_CMD_PROBE_CLIENT,
8954                 .doit = nl80211_probe_client,
8955                 .policy = nl80211_policy,
8956                 .flags = GENL_ADMIN_PERM,
8957                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8958                                   NL80211_FLAG_NEED_RTNL,
8959         },
8960         {
8961                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8962                 .doit = nl80211_register_beacons,
8963                 .policy = nl80211_policy,
8964                 .flags = GENL_ADMIN_PERM,
8965                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8966                                   NL80211_FLAG_NEED_RTNL,
8967         },
8968         {
8969                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8970                 .doit = nl80211_set_noack_map,
8971                 .policy = nl80211_policy,
8972                 .flags = GENL_ADMIN_PERM,
8973                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8974                                   NL80211_FLAG_NEED_RTNL,
8975         },
8976         {
8977                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8978                 .doit = nl80211_start_p2p_device,
8979                 .policy = nl80211_policy,
8980                 .flags = GENL_ADMIN_PERM,
8981                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8982                                   NL80211_FLAG_NEED_RTNL,
8983         },
8984         {
8985                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8986                 .doit = nl80211_stop_p2p_device,
8987                 .policy = nl80211_policy,
8988                 .flags = GENL_ADMIN_PERM,
8989                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8990                                   NL80211_FLAG_NEED_RTNL,
8991         },
8992         {
8993                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8994                 .doit = nl80211_set_mcast_rate,
8995                 .policy = nl80211_policy,
8996                 .flags = GENL_ADMIN_PERM,
8997                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8998                                   NL80211_FLAG_NEED_RTNL,
8999         },
9000         {
9001                 .cmd = NL80211_CMD_SET_MAC_ACL,
9002                 .doit = nl80211_set_mac_acl,
9003                 .policy = nl80211_policy,
9004                 .flags = GENL_ADMIN_PERM,
9005                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9006                                   NL80211_FLAG_NEED_RTNL,
9007         },
9008         {
9009                 .cmd = NL80211_CMD_RADAR_DETECT,
9010                 .doit = nl80211_start_radar_detection,
9011                 .policy = nl80211_policy,
9012                 .flags = GENL_ADMIN_PERM,
9013                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9014                                   NL80211_FLAG_NEED_RTNL,
9015         },
9016         {
9017                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9018                 .doit = nl80211_get_protocol_features,
9019                 .policy = nl80211_policy,
9020         },
9021         {
9022                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9023                 .doit = nl80211_update_ft_ies,
9024                 .policy = nl80211_policy,
9025                 .flags = GENL_ADMIN_PERM,
9026                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9027                                   NL80211_FLAG_NEED_RTNL,
9028         },
9029         {
9030                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9031                 .doit = nl80211_crit_protocol_start,
9032                 .policy = nl80211_policy,
9033                 .flags = GENL_ADMIN_PERM,
9034                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9035                                   NL80211_FLAG_NEED_RTNL,
9036         },
9037         {
9038                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9039                 .doit = nl80211_crit_protocol_stop,
9040                 .policy = nl80211_policy,
9041                 .flags = GENL_ADMIN_PERM,
9042                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9043                                   NL80211_FLAG_NEED_RTNL,
9044         }
9045 };
9046
9047 static struct genl_multicast_group nl80211_mlme_mcgrp = {
9048         .name = "mlme",
9049 };
9050
9051 /* multicast groups */
9052 static struct genl_multicast_group nl80211_config_mcgrp = {
9053         .name = "config",
9054 };
9055 static struct genl_multicast_group nl80211_scan_mcgrp = {
9056         .name = "scan",
9057 };
9058 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
9059         .name = "regulatory",
9060 };
9061
9062 /* notification functions */
9063
9064 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9065 {
9066         struct sk_buff *msg;
9067         struct nl80211_dump_wiphy_state state = {};
9068
9069         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9070         if (!msg)
9071                 return;
9072
9073         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9074                 nlmsg_free(msg);
9075                 return;
9076         }
9077
9078         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9079                                 nl80211_config_mcgrp.id, GFP_KERNEL);
9080 }
9081
9082 static int nl80211_add_scan_req(struct sk_buff *msg,
9083                                 struct cfg80211_registered_device *rdev)
9084 {
9085         struct cfg80211_scan_request *req = rdev->scan_req;
9086         struct nlattr *nest;
9087         int i;
9088
9089         if (WARN_ON(!req))
9090                 return 0;
9091
9092         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9093         if (!nest)
9094                 goto nla_put_failure;
9095         for (i = 0; i < req->n_ssids; i++) {
9096                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9097                         goto nla_put_failure;
9098         }
9099         nla_nest_end(msg, nest);
9100
9101         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9102         if (!nest)
9103                 goto nla_put_failure;
9104         for (i = 0; i < req->n_channels; i++) {
9105                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9106                         goto nla_put_failure;
9107         }
9108         nla_nest_end(msg, nest);
9109
9110         if (req->ie &&
9111             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9112                 goto nla_put_failure;
9113
9114         if (req->flags)
9115                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
9116
9117         return 0;
9118  nla_put_failure:
9119         return -ENOBUFS;
9120 }
9121
9122 static int nl80211_send_scan_msg(struct sk_buff *msg,
9123                                  struct cfg80211_registered_device *rdev,
9124                                  struct wireless_dev *wdev,
9125                                  u32 portid, u32 seq, int flags,
9126                                  u32 cmd)
9127 {
9128         void *hdr;
9129
9130         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9131         if (!hdr)
9132                 return -1;
9133
9134         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9135             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9136                                          wdev->netdev->ifindex)) ||
9137             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9138                 goto nla_put_failure;
9139
9140         /* ignore errors and send incomplete event anyway */
9141         nl80211_add_scan_req(msg, rdev);
9142
9143         return genlmsg_end(msg, hdr);
9144
9145  nla_put_failure:
9146         genlmsg_cancel(msg, hdr);
9147         return -EMSGSIZE;
9148 }
9149
9150 static int
9151 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9152                             struct cfg80211_registered_device *rdev,
9153                             struct net_device *netdev,
9154                             u32 portid, u32 seq, int flags, u32 cmd)
9155 {
9156         void *hdr;
9157
9158         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9159         if (!hdr)
9160                 return -1;
9161
9162         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9163             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9164                 goto nla_put_failure;
9165
9166         return genlmsg_end(msg, hdr);
9167
9168  nla_put_failure:
9169         genlmsg_cancel(msg, hdr);
9170         return -EMSGSIZE;
9171 }
9172
9173 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9174                              struct wireless_dev *wdev)
9175 {
9176         struct sk_buff *msg;
9177
9178         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9179         if (!msg)
9180                 return;
9181
9182         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9183                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9184                 nlmsg_free(msg);
9185                 return;
9186         }
9187
9188         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9189                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9190 }
9191
9192 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9193                             struct wireless_dev *wdev)
9194 {
9195         struct sk_buff *msg;
9196
9197         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9198         if (!msg)
9199                 return;
9200
9201         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9202                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9203                 nlmsg_free(msg);
9204                 return;
9205         }
9206
9207         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9208                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9209 }
9210
9211 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9212                                struct wireless_dev *wdev)
9213 {
9214         struct sk_buff *msg;
9215
9216         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9217         if (!msg)
9218                 return;
9219
9220         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9221                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9222                 nlmsg_free(msg);
9223                 return;
9224         }
9225
9226         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9227                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9228 }
9229
9230 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9231                                      struct net_device *netdev)
9232 {
9233         struct sk_buff *msg;
9234
9235         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9236         if (!msg)
9237                 return;
9238
9239         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9240                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9241                 nlmsg_free(msg);
9242                 return;
9243         }
9244
9245         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9246                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9247 }
9248
9249 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9250                              struct net_device *netdev, u32 cmd)
9251 {
9252         struct sk_buff *msg;
9253
9254         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9255         if (!msg)
9256                 return;
9257
9258         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9259                 nlmsg_free(msg);
9260                 return;
9261         }
9262
9263         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9264                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
9265 }
9266
9267 /*
9268  * This can happen on global regulatory changes or device specific settings
9269  * based on custom world regulatory domains.
9270  */
9271 void nl80211_send_reg_change_event(struct regulatory_request *request)
9272 {
9273         struct sk_buff *msg;
9274         void *hdr;
9275
9276         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9277         if (!msg)
9278                 return;
9279
9280         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9281         if (!hdr) {
9282                 nlmsg_free(msg);
9283                 return;
9284         }
9285
9286         /* Userspace can always count this one always being set */
9287         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9288                 goto nla_put_failure;
9289
9290         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9291                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9292                                NL80211_REGDOM_TYPE_WORLD))
9293                         goto nla_put_failure;
9294         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9295                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9296                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9297                         goto nla_put_failure;
9298         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9299                    request->intersect) {
9300                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9301                                NL80211_REGDOM_TYPE_INTERSECTION))
9302                         goto nla_put_failure;
9303         } else {
9304                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9305                                NL80211_REGDOM_TYPE_COUNTRY) ||
9306                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9307                                    request->alpha2))
9308                         goto nla_put_failure;
9309         }
9310
9311         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9312             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9313                 goto nla_put_failure;
9314
9315         genlmsg_end(msg, hdr);
9316
9317         rcu_read_lock();
9318         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9319                                 GFP_ATOMIC);
9320         rcu_read_unlock();
9321
9322         return;
9323
9324 nla_put_failure:
9325         genlmsg_cancel(msg, hdr);
9326         nlmsg_free(msg);
9327 }
9328
9329 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9330                                     struct net_device *netdev,
9331                                     const u8 *buf, size_t len,
9332                                     enum nl80211_commands cmd, gfp_t gfp)
9333 {
9334         struct sk_buff *msg;
9335         void *hdr;
9336
9337         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9338         if (!msg)
9339                 return;
9340
9341         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9342         if (!hdr) {
9343                 nlmsg_free(msg);
9344                 return;
9345         }
9346
9347         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9348             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9349             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9350                 goto nla_put_failure;
9351
9352         genlmsg_end(msg, hdr);
9353
9354         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9355                                 nl80211_mlme_mcgrp.id, gfp);
9356         return;
9357
9358  nla_put_failure:
9359         genlmsg_cancel(msg, hdr);
9360         nlmsg_free(msg);
9361 }
9362
9363 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9364                           struct net_device *netdev, const u8 *buf,
9365                           size_t len, gfp_t gfp)
9366 {
9367         nl80211_send_mlme_event(rdev, netdev, buf, len,
9368                                 NL80211_CMD_AUTHENTICATE, gfp);
9369 }
9370
9371 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9372                            struct net_device *netdev, const u8 *buf,
9373                            size_t len, gfp_t gfp)
9374 {
9375         nl80211_send_mlme_event(rdev, netdev, buf, len,
9376                                 NL80211_CMD_ASSOCIATE, gfp);
9377 }
9378
9379 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9380                          struct net_device *netdev, const u8 *buf,
9381                          size_t len, gfp_t gfp)
9382 {
9383         nl80211_send_mlme_event(rdev, netdev, buf, len,
9384                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9385 }
9386
9387 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9388                            struct net_device *netdev, const u8 *buf,
9389                            size_t len, gfp_t gfp)
9390 {
9391         nl80211_send_mlme_event(rdev, netdev, buf, len,
9392                                 NL80211_CMD_DISASSOCIATE, gfp);
9393 }
9394
9395 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
9396                                   size_t len)
9397 {
9398         struct wireless_dev *wdev = dev->ieee80211_ptr;
9399         struct wiphy *wiphy = wdev->wiphy;
9400         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9401         const struct ieee80211_mgmt *mgmt = (void *)buf;
9402         u32 cmd;
9403
9404         if (WARN_ON(len < 2))
9405                 return;
9406
9407         if (ieee80211_is_deauth(mgmt->frame_control))
9408                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
9409         else
9410                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
9411
9412         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
9413         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
9414 }
9415 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
9416
9417 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9418                                       struct net_device *netdev, int cmd,
9419                                       const u8 *addr, gfp_t gfp)
9420 {
9421         struct sk_buff *msg;
9422         void *hdr;
9423
9424         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9425         if (!msg)
9426                 return;
9427
9428         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9429         if (!hdr) {
9430                 nlmsg_free(msg);
9431                 return;
9432         }
9433
9434         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9435             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9436             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9437             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9438                 goto nla_put_failure;
9439
9440         genlmsg_end(msg, hdr);
9441
9442         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9443                                 nl80211_mlme_mcgrp.id, gfp);
9444         return;
9445
9446  nla_put_failure:
9447         genlmsg_cancel(msg, hdr);
9448         nlmsg_free(msg);
9449 }
9450
9451 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9452                                struct net_device *netdev, const u8 *addr,
9453                                gfp_t gfp)
9454 {
9455         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9456                                   addr, gfp);
9457 }
9458
9459 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9460                                 struct net_device *netdev, const u8 *addr,
9461                                 gfp_t gfp)
9462 {
9463         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9464                                   addr, gfp);
9465 }
9466
9467 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9468                                  struct net_device *netdev, const u8 *bssid,
9469                                  const u8 *req_ie, size_t req_ie_len,
9470                                  const u8 *resp_ie, size_t resp_ie_len,
9471                                  u16 status, gfp_t gfp)
9472 {
9473         struct sk_buff *msg;
9474         void *hdr;
9475
9476         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9477         if (!msg)
9478                 return;
9479
9480         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9481         if (!hdr) {
9482                 nlmsg_free(msg);
9483                 return;
9484         }
9485
9486         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9487             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9488             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9489             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9490             (req_ie &&
9491              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9492             (resp_ie &&
9493              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9494                 goto nla_put_failure;
9495
9496         genlmsg_end(msg, hdr);
9497
9498         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9499                                 nl80211_mlme_mcgrp.id, gfp);
9500         return;
9501
9502  nla_put_failure:
9503         genlmsg_cancel(msg, hdr);
9504         nlmsg_free(msg);
9505
9506 }
9507
9508 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9509                          struct net_device *netdev, const u8 *bssid,
9510                          const u8 *req_ie, size_t req_ie_len,
9511                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9512 {
9513         struct sk_buff *msg;
9514         void *hdr;
9515
9516         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9517         if (!msg)
9518                 return;
9519
9520         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9521         if (!hdr) {
9522                 nlmsg_free(msg);
9523                 return;
9524         }
9525
9526         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9527             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9528             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9529             (req_ie &&
9530              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9531             (resp_ie &&
9532              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9533                 goto nla_put_failure;
9534
9535         genlmsg_end(msg, hdr);
9536
9537         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9538                                 nl80211_mlme_mcgrp.id, gfp);
9539         return;
9540
9541  nla_put_failure:
9542         genlmsg_cancel(msg, hdr);
9543         nlmsg_free(msg);
9544
9545 }
9546
9547 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9548                                struct net_device *netdev, u16 reason,
9549                                const u8 *ie, size_t ie_len, bool from_ap)
9550 {
9551         struct sk_buff *msg;
9552         void *hdr;
9553
9554         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9555         if (!msg)
9556                 return;
9557
9558         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9559         if (!hdr) {
9560                 nlmsg_free(msg);
9561                 return;
9562         }
9563
9564         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9565             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9566             (from_ap && reason &&
9567              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9568             (from_ap &&
9569              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9570             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9571                 goto nla_put_failure;
9572
9573         genlmsg_end(msg, hdr);
9574
9575         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9576                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9577         return;
9578
9579  nla_put_failure:
9580         genlmsg_cancel(msg, hdr);
9581         nlmsg_free(msg);
9582
9583 }
9584
9585 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9586                              struct net_device *netdev, const u8 *bssid,
9587                              gfp_t gfp)
9588 {
9589         struct sk_buff *msg;
9590         void *hdr;
9591
9592         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9593         if (!msg)
9594                 return;
9595
9596         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9597         if (!hdr) {
9598                 nlmsg_free(msg);
9599                 return;
9600         }
9601
9602         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9603             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9604             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9605                 goto nla_put_failure;
9606
9607         genlmsg_end(msg, hdr);
9608
9609         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9610                                 nl80211_mlme_mcgrp.id, gfp);
9611         return;
9612
9613  nla_put_failure:
9614         genlmsg_cancel(msg, hdr);
9615         nlmsg_free(msg);
9616 }
9617
9618 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
9619                                         const u8* ie, u8 ie_len, gfp_t gfp)
9620 {
9621         struct wireless_dev *wdev = dev->ieee80211_ptr;
9622         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9623         struct sk_buff *msg;
9624         void *hdr;
9625
9626         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
9627                 return;
9628
9629         trace_cfg80211_notify_new_peer_candidate(dev, addr);
9630
9631         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9632         if (!msg)
9633                 return;
9634
9635         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9636         if (!hdr) {
9637                 nlmsg_free(msg);
9638                 return;
9639         }
9640
9641         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9642             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9643             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9644             (ie_len && ie &&
9645              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9646                 goto nla_put_failure;
9647
9648         genlmsg_end(msg, hdr);
9649
9650         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9651                                 nl80211_mlme_mcgrp.id, gfp);
9652         return;
9653
9654  nla_put_failure:
9655         genlmsg_cancel(msg, hdr);
9656         nlmsg_free(msg);
9657 }
9658 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
9659
9660 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9661                                  struct net_device *netdev, const u8 *addr,
9662                                  enum nl80211_key_type key_type, int key_id,
9663                                  const u8 *tsc, gfp_t gfp)
9664 {
9665         struct sk_buff *msg;
9666         void *hdr;
9667
9668         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9669         if (!msg)
9670                 return;
9671
9672         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9673         if (!hdr) {
9674                 nlmsg_free(msg);
9675                 return;
9676         }
9677
9678         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9679             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9680             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9681             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9682             (key_id != -1 &&
9683              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9684             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9685                 goto nla_put_failure;
9686
9687         genlmsg_end(msg, hdr);
9688
9689         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9690                                 nl80211_mlme_mcgrp.id, gfp);
9691         return;
9692
9693  nla_put_failure:
9694         genlmsg_cancel(msg, hdr);
9695         nlmsg_free(msg);
9696 }
9697
9698 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9699                                     struct ieee80211_channel *channel_before,
9700                                     struct ieee80211_channel *channel_after)
9701 {
9702         struct sk_buff *msg;
9703         void *hdr;
9704         struct nlattr *nl_freq;
9705
9706         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9707         if (!msg)
9708                 return;
9709
9710         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9711         if (!hdr) {
9712                 nlmsg_free(msg);
9713                 return;
9714         }
9715
9716         /*
9717          * Since we are applying the beacon hint to a wiphy we know its
9718          * wiphy_idx is valid
9719          */
9720         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9721                 goto nla_put_failure;
9722
9723         /* Before */
9724         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9725         if (!nl_freq)
9726                 goto nla_put_failure;
9727         if (nl80211_msg_put_channel(msg, channel_before, false))
9728                 goto nla_put_failure;
9729         nla_nest_end(msg, nl_freq);
9730
9731         /* After */
9732         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9733         if (!nl_freq)
9734                 goto nla_put_failure;
9735         if (nl80211_msg_put_channel(msg, channel_after, false))
9736                 goto nla_put_failure;
9737         nla_nest_end(msg, nl_freq);
9738
9739         genlmsg_end(msg, hdr);
9740
9741         rcu_read_lock();
9742         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9743                                 GFP_ATOMIC);
9744         rcu_read_unlock();
9745
9746         return;
9747
9748 nla_put_failure:
9749         genlmsg_cancel(msg, hdr);
9750         nlmsg_free(msg);
9751 }
9752
9753 static void nl80211_send_remain_on_chan_event(
9754         int cmd, struct cfg80211_registered_device *rdev,
9755         struct wireless_dev *wdev, u64 cookie,
9756         struct ieee80211_channel *chan,
9757         unsigned int duration, gfp_t gfp)
9758 {
9759         struct sk_buff *msg;
9760         void *hdr;
9761
9762         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9763         if (!msg)
9764                 return;
9765
9766         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9767         if (!hdr) {
9768                 nlmsg_free(msg);
9769                 return;
9770         }
9771
9772         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9773             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9774                                          wdev->netdev->ifindex)) ||
9775             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9776             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9777             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9778                         NL80211_CHAN_NO_HT) ||
9779             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9780                 goto nla_put_failure;
9781
9782         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9783             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9784                 goto nla_put_failure;
9785
9786         genlmsg_end(msg, hdr);
9787
9788         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9789                                 nl80211_mlme_mcgrp.id, gfp);
9790         return;
9791
9792  nla_put_failure:
9793         genlmsg_cancel(msg, hdr);
9794         nlmsg_free(msg);
9795 }
9796
9797 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
9798                                struct ieee80211_channel *chan,
9799                                unsigned int duration, gfp_t gfp)
9800 {
9801         struct wiphy *wiphy = wdev->wiphy;
9802         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9803
9804         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
9805         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9806                                           rdev, wdev, cookie, chan,
9807                                           duration, gfp);
9808 }
9809 EXPORT_SYMBOL(cfg80211_ready_on_channel);
9810
9811 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
9812                                         struct ieee80211_channel *chan,
9813                                         gfp_t gfp)
9814 {
9815         struct wiphy *wiphy = wdev->wiphy;
9816         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9817
9818         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
9819         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9820                                           rdev, wdev, cookie, chan, 0, gfp);
9821 }
9822 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
9823
9824 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
9825                       struct station_info *sinfo, gfp_t gfp)
9826 {
9827         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9828         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9829         struct sk_buff *msg;
9830
9831         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
9832
9833         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9834         if (!msg)
9835                 return;
9836
9837         if (nl80211_send_station(msg, 0, 0, 0,
9838                                  rdev, dev, mac_addr, sinfo) < 0) {
9839                 nlmsg_free(msg);
9840                 return;
9841         }
9842
9843         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9844                                 nl80211_mlme_mcgrp.id, gfp);
9845 }
9846 EXPORT_SYMBOL(cfg80211_new_sta);
9847
9848 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
9849 {
9850         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9851         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9852         struct sk_buff *msg;
9853         void *hdr;
9854
9855         trace_cfg80211_del_sta(dev, mac_addr);
9856
9857         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9858         if (!msg)
9859                 return;
9860
9861         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9862         if (!hdr) {
9863                 nlmsg_free(msg);
9864                 return;
9865         }
9866
9867         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9868             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9869                 goto nla_put_failure;
9870
9871         genlmsg_end(msg, hdr);
9872
9873         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9874                                 nl80211_mlme_mcgrp.id, gfp);
9875         return;
9876
9877  nla_put_failure:
9878         genlmsg_cancel(msg, hdr);
9879         nlmsg_free(msg);
9880 }
9881 EXPORT_SYMBOL(cfg80211_del_sta);
9882
9883 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
9884                           enum nl80211_connect_failed_reason reason,
9885                           gfp_t gfp)
9886 {
9887         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
9888         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9889         struct sk_buff *msg;
9890         void *hdr;
9891
9892         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9893         if (!msg)
9894                 return;
9895
9896         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9897         if (!hdr) {
9898                 nlmsg_free(msg);
9899                 return;
9900         }
9901
9902         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9903             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9904             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9905                 goto nla_put_failure;
9906
9907         genlmsg_end(msg, hdr);
9908
9909         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9910                                 nl80211_mlme_mcgrp.id, gfp);
9911         return;
9912
9913  nla_put_failure:
9914         genlmsg_cancel(msg, hdr);
9915         nlmsg_free(msg);
9916 }
9917 EXPORT_SYMBOL(cfg80211_conn_failed);
9918
9919 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9920                                        const u8 *addr, gfp_t gfp)
9921 {
9922         struct wireless_dev *wdev = dev->ieee80211_ptr;
9923         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9924         struct sk_buff *msg;
9925         void *hdr;
9926         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9927
9928         if (!nlportid)
9929                 return false;
9930
9931         msg = nlmsg_new(100, gfp);
9932         if (!msg)
9933                 return true;
9934
9935         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9936         if (!hdr) {
9937                 nlmsg_free(msg);
9938                 return true;
9939         }
9940
9941         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9942             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9943             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9944                 goto nla_put_failure;
9945
9946         genlmsg_end(msg, hdr);
9947         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9948         return true;
9949
9950  nla_put_failure:
9951         genlmsg_cancel(msg, hdr);
9952         nlmsg_free(msg);
9953         return true;
9954 }
9955
9956 bool cfg80211_rx_spurious_frame(struct net_device *dev,
9957                                 const u8 *addr, gfp_t gfp)
9958 {
9959         struct wireless_dev *wdev = dev->ieee80211_ptr;
9960         bool ret;
9961
9962         trace_cfg80211_rx_spurious_frame(dev, addr);
9963
9964         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9965                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
9966                 trace_cfg80211_return_bool(false);
9967                 return false;
9968         }
9969         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9970                                          addr, gfp);
9971         trace_cfg80211_return_bool(ret);
9972         return ret;
9973 }
9974 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
9975
9976 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
9977                                         const u8 *addr, gfp_t gfp)
9978 {
9979         struct wireless_dev *wdev = dev->ieee80211_ptr;
9980         bool ret;
9981
9982         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
9983
9984         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
9985                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
9986                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
9987                 trace_cfg80211_return_bool(false);
9988                 return false;
9989         }
9990         ret = __nl80211_unexpected_frame(dev,
9991                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9992                                          addr, gfp);
9993         trace_cfg80211_return_bool(ret);
9994         return ret;
9995 }
9996 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
9997
9998 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9999                       struct wireless_dev *wdev, u32 nlportid,
10000                       int freq, int sig_dbm,
10001                       const u8 *buf, size_t len, gfp_t gfp)
10002 {
10003         struct net_device *netdev = wdev->netdev;
10004         struct sk_buff *msg;
10005         void *hdr;
10006
10007         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10008         if (!msg)
10009                 return -ENOMEM;
10010
10011         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10012         if (!hdr) {
10013                 nlmsg_free(msg);
10014                 return -ENOMEM;
10015         }
10016
10017         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10018             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10019                                         netdev->ifindex)) ||
10020             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10021             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10022             (sig_dbm &&
10023              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10024             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
10025                 goto nla_put_failure;
10026
10027         genlmsg_end(msg, hdr);
10028
10029         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10030
10031  nla_put_failure:
10032         genlmsg_cancel(msg, hdr);
10033         nlmsg_free(msg);
10034         return -ENOBUFS;
10035 }
10036
10037 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10038                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10039 {
10040         struct wiphy *wiphy = wdev->wiphy;
10041         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10042         struct net_device *netdev = wdev->netdev;
10043         struct sk_buff *msg;
10044         void *hdr;
10045
10046         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10047
10048         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10049         if (!msg)
10050                 return;
10051
10052         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10053         if (!hdr) {
10054                 nlmsg_free(msg);
10055                 return;
10056         }
10057
10058         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10059             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10060                                    netdev->ifindex)) ||
10061             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10062             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10063             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10064             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10065                 goto nla_put_failure;
10066
10067         genlmsg_end(msg, hdr);
10068
10069         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10070                                 nl80211_mlme_mcgrp.id, gfp);
10071         return;
10072
10073  nla_put_failure:
10074         genlmsg_cancel(msg, hdr);
10075         nlmsg_free(msg);
10076 }
10077 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10078
10079 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10080                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10081                               gfp_t gfp)
10082 {
10083         struct wireless_dev *wdev = dev->ieee80211_ptr;
10084         struct wiphy *wiphy = wdev->wiphy;
10085         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10086         struct sk_buff *msg;
10087         struct nlattr *pinfoattr;
10088         void *hdr;
10089
10090         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10091
10092         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10093         if (!msg)
10094                 return;
10095
10096         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10097         if (!hdr) {
10098                 nlmsg_free(msg);
10099                 return;
10100         }
10101
10102         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10103             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10104                 goto nla_put_failure;
10105
10106         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10107         if (!pinfoattr)
10108                 goto nla_put_failure;
10109
10110         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10111                         rssi_event))
10112                 goto nla_put_failure;
10113
10114         nla_nest_end(msg, pinfoattr);
10115
10116         genlmsg_end(msg, hdr);
10117
10118         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10119                                 nl80211_mlme_mcgrp.id, gfp);
10120         return;
10121
10122  nla_put_failure:
10123         genlmsg_cancel(msg, hdr);
10124         nlmsg_free(msg);
10125 }
10126 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10127
10128 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10129                                      struct net_device *netdev, const u8 *bssid,
10130                                      const u8 *replay_ctr, gfp_t gfp)
10131 {
10132         struct sk_buff *msg;
10133         struct nlattr *rekey_attr;
10134         void *hdr;
10135
10136         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10137         if (!msg)
10138                 return;
10139
10140         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10141         if (!hdr) {
10142                 nlmsg_free(msg);
10143                 return;
10144         }
10145
10146         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10147             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10148             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10149                 goto nla_put_failure;
10150
10151         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10152         if (!rekey_attr)
10153                 goto nla_put_failure;
10154
10155         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10156                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10157                 goto nla_put_failure;
10158
10159         nla_nest_end(msg, rekey_attr);
10160
10161         genlmsg_end(msg, hdr);
10162
10163         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10164                                 nl80211_mlme_mcgrp.id, gfp);
10165         return;
10166
10167  nla_put_failure:
10168         genlmsg_cancel(msg, hdr);
10169         nlmsg_free(msg);
10170 }
10171
10172 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10173                                const u8 *replay_ctr, gfp_t gfp)
10174 {
10175         struct wireless_dev *wdev = dev->ieee80211_ptr;
10176         struct wiphy *wiphy = wdev->wiphy;
10177         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10178
10179         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10180         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10181 }
10182 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10183
10184 static void
10185 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10186                                struct net_device *netdev, int index,
10187                                const u8 *bssid, bool preauth, gfp_t gfp)
10188 {
10189         struct sk_buff *msg;
10190         struct nlattr *attr;
10191         void *hdr;
10192
10193         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10194         if (!msg)
10195                 return;
10196
10197         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10198         if (!hdr) {
10199                 nlmsg_free(msg);
10200                 return;
10201         }
10202
10203         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10204             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10205                 goto nla_put_failure;
10206
10207         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10208         if (!attr)
10209                 goto nla_put_failure;
10210
10211         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10212             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10213             (preauth &&
10214              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10215                 goto nla_put_failure;
10216
10217         nla_nest_end(msg, attr);
10218
10219         genlmsg_end(msg, hdr);
10220
10221         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10222                                 nl80211_mlme_mcgrp.id, gfp);
10223         return;
10224
10225  nla_put_failure:
10226         genlmsg_cancel(msg, hdr);
10227         nlmsg_free(msg);
10228 }
10229
10230 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10231                                      const u8 *bssid, bool preauth, gfp_t gfp)
10232 {
10233         struct wireless_dev *wdev = dev->ieee80211_ptr;
10234         struct wiphy *wiphy = wdev->wiphy;
10235         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10236
10237         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10238         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10239 }
10240 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10241
10242 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10243                                      struct net_device *netdev,
10244                                      struct cfg80211_chan_def *chandef,
10245                                      gfp_t gfp)
10246 {
10247         struct sk_buff *msg;
10248         void *hdr;
10249
10250         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10251         if (!msg)
10252                 return;
10253
10254         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10255         if (!hdr) {
10256                 nlmsg_free(msg);
10257                 return;
10258         }
10259
10260         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10261                 goto nla_put_failure;
10262
10263         if (nl80211_send_chandef(msg, chandef))
10264                 goto nla_put_failure;
10265
10266         genlmsg_end(msg, hdr);
10267
10268         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10269                                 nl80211_mlme_mcgrp.id, gfp);
10270         return;
10271
10272  nla_put_failure:
10273         genlmsg_cancel(msg, hdr);
10274         nlmsg_free(msg);
10275 }
10276
10277 void cfg80211_ch_switch_notify(struct net_device *dev,
10278                                struct cfg80211_chan_def *chandef)
10279 {
10280         struct wireless_dev *wdev = dev->ieee80211_ptr;
10281         struct wiphy *wiphy = wdev->wiphy;
10282         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10283
10284         trace_cfg80211_ch_switch_notify(dev, chandef);
10285
10286         wdev_lock(wdev);
10287
10288         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10289                     wdev->iftype != NL80211_IFTYPE_P2P_GO))
10290                 goto out;
10291
10292         wdev->channel = chandef->chan;
10293         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10294 out:
10295         wdev_unlock(wdev);
10296         return;
10297 }
10298 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10299
10300 void cfg80211_cqm_txe_notify(struct net_device *dev,
10301                              const u8 *peer, u32 num_packets,
10302                              u32 rate, u32 intvl, gfp_t gfp)
10303 {
10304         struct wireless_dev *wdev = dev->ieee80211_ptr;
10305         struct wiphy *wiphy = wdev->wiphy;
10306         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10307         struct sk_buff *msg;
10308         struct nlattr *pinfoattr;
10309         void *hdr;
10310
10311         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10312         if (!msg)
10313                 return;
10314
10315         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10316         if (!hdr) {
10317                 nlmsg_free(msg);
10318                 return;
10319         }
10320
10321         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10322             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10323             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10324                 goto nla_put_failure;
10325
10326         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10327         if (!pinfoattr)
10328                 goto nla_put_failure;
10329
10330         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10331                 goto nla_put_failure;
10332
10333         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10334                 goto nla_put_failure;
10335
10336         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10337                 goto nla_put_failure;
10338
10339         nla_nest_end(msg, pinfoattr);
10340
10341         genlmsg_end(msg, hdr);
10342
10343         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10344                                 nl80211_mlme_mcgrp.id, gfp);
10345         return;
10346
10347  nla_put_failure:
10348         genlmsg_cancel(msg, hdr);
10349         nlmsg_free(msg);
10350 }
10351 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10352
10353 void
10354 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10355                      struct cfg80211_chan_def *chandef,
10356                      enum nl80211_radar_event event,
10357                      struct net_device *netdev, gfp_t gfp)
10358 {
10359         struct sk_buff *msg;
10360         void *hdr;
10361
10362         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10363         if (!msg)
10364                 return;
10365
10366         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10367         if (!hdr) {
10368                 nlmsg_free(msg);
10369                 return;
10370         }
10371
10372         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10373                 goto nla_put_failure;
10374
10375         /* NOP and radar events don't need a netdev parameter */
10376         if (netdev) {
10377                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10378
10379                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10380                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10381                         goto nla_put_failure;
10382         }
10383
10384         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10385                 goto nla_put_failure;
10386
10387         if (nl80211_send_chandef(msg, chandef))
10388                 goto nla_put_failure;
10389
10390         genlmsg_end(msg, hdr);
10391
10392         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10393                                 nl80211_mlme_mcgrp.id, gfp);
10394         return;
10395
10396  nla_put_failure:
10397         genlmsg_cancel(msg, hdr);
10398         nlmsg_free(msg);
10399 }
10400
10401 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10402                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10403 {
10404         struct wireless_dev *wdev = dev->ieee80211_ptr;
10405         struct wiphy *wiphy = wdev->wiphy;
10406         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10407         struct sk_buff *msg;
10408         struct nlattr *pinfoattr;
10409         void *hdr;
10410
10411         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10412
10413         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10414         if (!msg)
10415                 return;
10416
10417         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10418         if (!hdr) {
10419                 nlmsg_free(msg);
10420                 return;
10421         }
10422
10423         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10424             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10425             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10426                 goto nla_put_failure;
10427
10428         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10429         if (!pinfoattr)
10430                 goto nla_put_failure;
10431
10432         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10433                 goto nla_put_failure;
10434
10435         nla_nest_end(msg, pinfoattr);
10436
10437         genlmsg_end(msg, hdr);
10438
10439         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10440                                 nl80211_mlme_mcgrp.id, gfp);
10441         return;
10442
10443  nla_put_failure:
10444         genlmsg_cancel(msg, hdr);
10445         nlmsg_free(msg);
10446 }
10447 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10448
10449 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10450                            u64 cookie, bool acked, gfp_t gfp)
10451 {
10452         struct wireless_dev *wdev = dev->ieee80211_ptr;
10453         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10454         struct sk_buff *msg;
10455         void *hdr;
10456
10457         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10458
10459         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10460
10461         if (!msg)
10462                 return;
10463
10464         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10465         if (!hdr) {
10466                 nlmsg_free(msg);
10467                 return;
10468         }
10469
10470         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10471             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10472             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10473             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10474             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10475                 goto nla_put_failure;
10476
10477         genlmsg_end(msg, hdr);
10478
10479         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10480                                 nl80211_mlme_mcgrp.id, gfp);
10481         return;
10482
10483  nla_put_failure:
10484         genlmsg_cancel(msg, hdr);
10485         nlmsg_free(msg);
10486 }
10487 EXPORT_SYMBOL(cfg80211_probe_status);
10488
10489 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10490                                  const u8 *frame, size_t len,
10491                                  int freq, int sig_dbm)
10492 {
10493         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10494         struct sk_buff *msg;
10495         void *hdr;
10496         struct cfg80211_beacon_registration *reg;
10497
10498         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10499
10500         spin_lock_bh(&rdev->beacon_registrations_lock);
10501         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10502                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10503                 if (!msg) {
10504                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10505                         return;
10506                 }
10507
10508                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10509                 if (!hdr)
10510                         goto nla_put_failure;
10511
10512                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10513                     (freq &&
10514                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10515                     (sig_dbm &&
10516                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10517                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10518                         goto nla_put_failure;
10519
10520                 genlmsg_end(msg, hdr);
10521
10522                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10523         }
10524         spin_unlock_bh(&rdev->beacon_registrations_lock);
10525         return;
10526
10527  nla_put_failure:
10528         spin_unlock_bh(&rdev->beacon_registrations_lock);
10529         if (hdr)
10530                 genlmsg_cancel(msg, hdr);
10531         nlmsg_free(msg);
10532 }
10533 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10534
10535 #ifdef CONFIG_PM
10536 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10537                                    struct cfg80211_wowlan_wakeup *wakeup,
10538                                    gfp_t gfp)
10539 {
10540         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10541         struct sk_buff *msg;
10542         void *hdr;
10543         int size = 200;
10544
10545         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10546
10547         if (wakeup)
10548                 size += wakeup->packet_present_len;
10549
10550         msg = nlmsg_new(size, gfp);
10551         if (!msg)
10552                 return;
10553
10554         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10555         if (!hdr)
10556                 goto free_msg;
10557
10558         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10559             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10560                 goto free_msg;
10561
10562         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10563                                         wdev->netdev->ifindex))
10564                 goto free_msg;
10565
10566         if (wakeup) {
10567                 struct nlattr *reasons;
10568
10569                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10570
10571                 if (wakeup->disconnect &&
10572                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10573                         goto free_msg;
10574                 if (wakeup->magic_pkt &&
10575                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10576                         goto free_msg;
10577                 if (wakeup->gtk_rekey_failure &&
10578                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10579                         goto free_msg;
10580                 if (wakeup->eap_identity_req &&
10581                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10582                         goto free_msg;
10583                 if (wakeup->four_way_handshake &&
10584                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10585                         goto free_msg;
10586                 if (wakeup->rfkill_release &&
10587                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10588                         goto free_msg;
10589
10590                 if (wakeup->pattern_idx >= 0 &&
10591                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10592                                 wakeup->pattern_idx))
10593                         goto free_msg;
10594
10595                 if (wakeup->tcp_match)
10596                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10597
10598                 if (wakeup->tcp_connlost)
10599                         nla_put_flag(msg,
10600                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10601
10602                 if (wakeup->tcp_nomoretokens)
10603                         nla_put_flag(msg,
10604                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10605
10606                 if (wakeup->packet) {
10607                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10608                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10609
10610                         if (!wakeup->packet_80211) {
10611                                 pkt_attr =
10612                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10613                                 len_attr =
10614                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10615                         }
10616
10617                         if (wakeup->packet_len &&
10618                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10619                                 goto free_msg;
10620
10621                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10622                                     wakeup->packet))
10623                                 goto free_msg;
10624                 }
10625
10626                 nla_nest_end(msg, reasons);
10627         }
10628
10629         genlmsg_end(msg, hdr);
10630
10631         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10632                                 nl80211_mlme_mcgrp.id, gfp);
10633         return;
10634
10635  free_msg:
10636         nlmsg_free(msg);
10637 }
10638 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10639 #endif
10640
10641 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10642                                 enum nl80211_tdls_operation oper,
10643                                 u16 reason_code, gfp_t gfp)
10644 {
10645         struct wireless_dev *wdev = dev->ieee80211_ptr;
10646         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10647         struct sk_buff *msg;
10648         void *hdr;
10649
10650         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10651                                          reason_code);
10652
10653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10654         if (!msg)
10655                 return;
10656
10657         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10658         if (!hdr) {
10659                 nlmsg_free(msg);
10660                 return;
10661         }
10662
10663         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10664             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10665             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10666             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10667             (reason_code > 0 &&
10668              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10669                 goto nla_put_failure;
10670
10671         genlmsg_end(msg, hdr);
10672
10673         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10674                                 nl80211_mlme_mcgrp.id, gfp);
10675         return;
10676
10677  nla_put_failure:
10678         genlmsg_cancel(msg, hdr);
10679         nlmsg_free(msg);
10680 }
10681 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10682
10683 static int nl80211_netlink_notify(struct notifier_block * nb,
10684                                   unsigned long state,
10685                                   void *_notify)
10686 {
10687         struct netlink_notify *notify = _notify;
10688         struct cfg80211_registered_device *rdev;
10689         struct wireless_dev *wdev;
10690         struct cfg80211_beacon_registration *reg, *tmp;
10691
10692         if (state != NETLINK_URELEASE)
10693                 return NOTIFY_DONE;
10694
10695         rcu_read_lock();
10696
10697         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10698                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10699                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10700
10701                 spin_lock_bh(&rdev->beacon_registrations_lock);
10702                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10703                                          list) {
10704                         if (reg->nlportid == notify->portid) {
10705                                 list_del(&reg->list);
10706                                 kfree(reg);
10707                                 break;
10708                         }
10709                 }
10710                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10711         }
10712
10713         rcu_read_unlock();
10714
10715         return NOTIFY_DONE;
10716 }
10717
10718 static struct notifier_block nl80211_netlink_notifier = {
10719         .notifier_call = nl80211_netlink_notify,
10720 };
10721
10722 void cfg80211_ft_event(struct net_device *netdev,
10723                        struct cfg80211_ft_event_params *ft_event)
10724 {
10725         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
10726         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10727         struct sk_buff *msg;
10728         void *hdr;
10729
10730         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
10731
10732         if (!ft_event->target_ap)
10733                 return;
10734
10735         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10736         if (!msg)
10737                 return;
10738
10739         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
10740         if (!hdr) {
10741                 nlmsg_free(msg);
10742                 return;
10743         }
10744
10745         nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
10746         nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
10747         nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap);
10748         if (ft_event->ies)
10749                 nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies);
10750         if (ft_event->ric_ies)
10751                 nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
10752                         ft_event->ric_ies);
10753
10754         genlmsg_end(msg, hdr);
10755
10756         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10757                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
10758 }
10759 EXPORT_SYMBOL(cfg80211_ft_event);
10760
10761 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
10762 {
10763         struct cfg80211_registered_device *rdev;
10764         struct sk_buff *msg;
10765         void *hdr;
10766         u32 nlportid;
10767
10768         rdev = wiphy_to_dev(wdev->wiphy);
10769         if (!rdev->crit_proto_nlportid)
10770                 return;
10771
10772         nlportid = rdev->crit_proto_nlportid;
10773         rdev->crit_proto_nlportid = 0;
10774
10775         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10776         if (!msg)
10777                 return;
10778
10779         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
10780         if (!hdr)
10781                 goto nla_put_failure;
10782
10783         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10784             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10785                 goto nla_put_failure;
10786
10787         genlmsg_end(msg, hdr);
10788
10789         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10790         return;
10791
10792  nla_put_failure:
10793         if (hdr)
10794                 genlmsg_cancel(msg, hdr);
10795         nlmsg_free(msg);
10796
10797 }
10798 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
10799
10800 /* initialisation/exit functions */
10801
10802 int nl80211_init(void)
10803 {
10804         int err;
10805
10806         err = genl_register_family_with_ops(&nl80211_fam,
10807                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10808         if (err)
10809                 return err;
10810
10811         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10812         if (err)
10813                 goto err_out;
10814
10815         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10816         if (err)
10817                 goto err_out;
10818
10819         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10820         if (err)
10821                 goto err_out;
10822
10823         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10824         if (err)
10825                 goto err_out;
10826
10827 #ifdef CONFIG_NL80211_TESTMODE
10828         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10829         if (err)
10830                 goto err_out;
10831 #endif
10832
10833         err = netlink_register_notifier(&nl80211_netlink_notifier);
10834         if (err)
10835                 goto err_out;
10836
10837         return 0;
10838  err_out:
10839         genl_unregister_family(&nl80211_fam);
10840         return err;
10841 }
10842
10843 void nl80211_exit(void)
10844 {
10845         netlink_unregister_notifier(&nl80211_netlink_notifier);
10846         genl_unregister_family(&nl80211_fam);
10847 }