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  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  */
   7
   8 #include <linux/if.h>
   9 #include <linux/module.h>
  10 #include <linux/err.h>
  11 #include <linux/slab.h>
  12 #include <linux/list.h>
  13 #include <linux/if_ether.h>
  14 #include <linux/ieee80211.h>
  15 #include <linux/nl80211.h>
  16 #include <linux/rtnetlink.h>
  17 #include <linux/netlink.h>
  18 #include <linux/etherdevice.h>
  19 #include <net/net_namespace.h>
  20 #include <net/genetlink.h>
  21 #include <net/cfg80211.h>
  22 #include <net/sock.h>
  23 #include <net/inet_connection_sock.h>
  24 #include "core.h"
  25 #include "nl80211.h"
  26 #include "reg.h"
  27 #include "rdev-ops.h"
  28
  29 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  30                                    struct genl_info *info,
  31                                    struct cfg80211_crypto_settings *settings,
  32                                    int cipher_limit);
  33
  34 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  35                             struct genl_info *info);
  36 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  37                               struct genl_info *info);
  38
  39 /* the netlink family */
  40 static struct genl_family nl80211_fam = {
  41         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  42         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  43         .hdrsize = 0,                   /* no private header */
  44         .version = 1,                   /* no particular meaning now */
  45         .maxattr = NL80211_ATTR_MAX,
  46         .netnsok = true,
  47         .pre_doit = nl80211_pre_doit,
  48         .post_doit = nl80211_post_doit,
  49 };
  50
  51 /* multicast groups */
  52 enum nl80211_multicast_groups {
  53         NL80211_MCGRP_CONFIG,
  54         NL80211_MCGRP_SCAN,
  55         NL80211_MCGRP_REGULATORY,
  56         NL80211_MCGRP_MLME,
  57         NL80211_MCGRP_VENDOR,
  58         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  59 };
  60
  61 static const struct genl_multicast_group nl80211_mcgrps[] = {
  62         [NL80211_MCGRP_CONFIG] = { .name = "config", },
  63         [NL80211_MCGRP_SCAN] = { .name = "scan", },
  64         [NL80211_MCGRP_REGULATORY] = { .name = "regulatory", },
  65         [NL80211_MCGRP_MLME] = { .name = "mlme", },
  66         [NL80211_MCGRP_VENDOR] = { .name = "vendor", },
  67 #ifdef CONFIG_NL80211_TESTMODE
  68         [NL80211_MCGRP_TESTMODE] = { .name = "testmode", }
  69 #endif
  70 };
  71
  72 /* returns ERR_PTR values */
  73 static struct wireless_dev *
  74 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  75 {
  76         struct cfg80211_registered_device *rdev;
  77         struct wireless_dev *result = NULL;
  78         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  79         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  80         u64 wdev_id;
  81         int wiphy_idx = -1;
  82         int ifidx = -1;
  83
  84         ASSERT_RTNL();
  85
  86         if (!have_ifidx && !have_wdev_id)
  87                 return ERR_PTR(-EINVAL);
  88
  89         if (have_ifidx)
  90                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  91         if (have_wdev_id) {
  92                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  93                 wiphy_idx = wdev_id >> 32;
  94         }
  95
  96         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  97                 struct wireless_dev *wdev;
  98
  99                 if (wiphy_net(&rdev->wiphy) != netns)
 100                         continue;
 101
 102                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 103                         continue;
 104
 105                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 106                         if (have_ifidx && wdev->netdev &&
 107                             wdev->netdev->ifindex == ifidx) {
 108                                 result = wdev;
 109                                 break;
 110                         }
 111                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 112                                 result = wdev;
 113                                 break;
 114                         }
 115                 }
 116
 117                 if (result)
 118                         break;
 119         }
 120
 121         if (result)
 122                 return result;
 123         return ERR_PTR(-ENODEV);
 124 }
 125
 126 static struct cfg80211_registered_device *
 127 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 128 {
 129         struct cfg80211_registered_device *rdev = NULL, *tmp;
 130         struct net_device *netdev;
 131
 132         ASSERT_RTNL();
 133
 134         if (!attrs[NL80211_ATTR_WIPHY] &&
 135             !attrs[NL80211_ATTR_IFINDEX] &&
 136             !attrs[NL80211_ATTR_WDEV])
 137                 return ERR_PTR(-EINVAL);
 138
 139         if (attrs[NL80211_ATTR_WIPHY])
 140                 rdev = cfg80211_rdev_by_wiphy_idx(
 141                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 142
 143         if (attrs[NL80211_ATTR_WDEV]) {
 144                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 145                 struct wireless_dev *wdev;
 146                 bool found = false;
 147
 148                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 149                 if (tmp) {
 150                         /* make sure wdev exists */
 151                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 152                                 if (wdev->identifier != (u32)wdev_id)
 153                                         continue;
 154                                 found = true;
 155                                 break;
 156                         }
 157
 158                         if (!found)
 159                                 tmp = NULL;
 160
 161                         if (rdev && tmp != rdev)
 162                                 return ERR_PTR(-EINVAL);
 163                         rdev = tmp;
 164                 }
 165         }
 166
 167         if (attrs[NL80211_ATTR_IFINDEX]) {
 168                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 169                 netdev = __dev_get_by_index(netns, ifindex);
 170                 if (netdev) {
 171                         if (netdev->ieee80211_ptr)
 172                                 tmp = wiphy_to_rdev(
 173                                         netdev->ieee80211_ptr->wiphy);
 174                         else
 175                                 tmp = NULL;
 176
 177                         /* not wireless device -- return error */
 178                         if (!tmp)
 179                                 return ERR_PTR(-EINVAL);
 180
 181                         /* mismatch -- return error */
 182                         if (rdev && tmp != rdev)
 183                                 return ERR_PTR(-EINVAL);
 184
 185                         rdev = tmp;
 186                 }
 187         }
 188
 189         if (!rdev)
 190                 return ERR_PTR(-ENODEV);
 191
 192         if (netns != wiphy_net(&rdev->wiphy))
 193                 return ERR_PTR(-ENODEV);
 194
 195         return rdev;
 196 }
 197
 198 /*
 199  * This function returns a pointer to the driver
 200  * that the genl_info item that is passed refers to.
 201  *
 202  * The result of this can be a PTR_ERR and hence must
 203  * be checked with IS_ERR() for errors.
 204  */
 205 static struct cfg80211_registered_device *
 206 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 207 {
 208         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 209 }
 210
 211 /* policy for the attributes */
 212 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 213         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 214         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 215                                       .len = 20-1 },
 216         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 217
 218         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 219         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 220         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 223
 224         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 225         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 226         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 227         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 229         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 230
 231         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 232         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 233         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 234
 235         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 236         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 237
 238         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 239         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 240                                     .len = WLAN_MAX_KEY_LEN },
 241         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 242         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 243         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 244         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 245         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 246
 247         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 248         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 249         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 250                                        .len = IEEE80211_MAX_DATA_LEN },
 251         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 252                                        .len = IEEE80211_MAX_DATA_LEN },
 253         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 254         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 255         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 256         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 257                                                .len = NL80211_MAX_SUPP_RATES },
 258         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 259         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 260         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 261         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 262                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 263         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 264
 265         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 266         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 267
 268         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 269         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 270         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 272                                            .len = NL80211_MAX_SUPP_RATES },
 273         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 274
 275         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 276         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 277
 278         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 279
 280         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 281         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 282                               .len = IEEE80211_MAX_DATA_LEN },
 283         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 284         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 285
 286         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 287                                 .len = IEEE80211_MAX_SSID_LEN },
 288         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 289         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 290         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 291         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 292         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 293         [NL80211_ATTR_STA_FLAGS2] = {
 294                 .len = sizeof(struct nl80211_sta_flag_update),
 295         },
 296         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 297         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 301         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 302         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 303         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 304         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 305                                  .len = WLAN_PMKID_LEN },
 306         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 307         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 308         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 309         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 310                                  .len = IEEE80211_MAX_DATA_LEN },
 311         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 312         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 313         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 314         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 315         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 316         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 317         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 318         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 319         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 320         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 321         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 323         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 324         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 325         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 326         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 327         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 328         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 329         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 330         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 331                                          .len = IEEE80211_MAX_DATA_LEN },
 332         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 333                                          .len = IEEE80211_MAX_DATA_LEN },
 334         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 335         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 336         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 337         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 338         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 339         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 341         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 342         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 345                                       .len = IEEE80211_MAX_DATA_LEN },
 346         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 347         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 348         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 349                 .len = NL80211_HT_CAPABILITY_LEN
 350         },
 351         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 352         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 353         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 354         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 355         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 356         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 357         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 358         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 359         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 360         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 361         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 362         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 363         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 364         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 365         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 366         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 367         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 368                 .len = NL80211_VHT_CAPABILITY_LEN,
 369         },
 370         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 371         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 372                                   .len = IEEE80211_MAX_DATA_LEN },
 373         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 374         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 375         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 376         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 377         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 378         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 379         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 382         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 383         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 384         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 385         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 386         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 387                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 388         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 389         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 390         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 391         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 392         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 393         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 395         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 396         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 397         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 398         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 399 };
 400
 401 /* policy for the key attributes */
 402 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 403         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 404         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 405         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 406         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 407         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 408         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 409         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 410         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 411 };
 412
 413 /* policy for the key default flags */
 414 static const struct nla_policy
 415 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 416         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 417         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 418 };
 419
 420 /* policy for WoWLAN attributes */
 421 static const struct nla_policy
 422 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 423         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 424         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 425         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 426         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 427         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 428         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 429         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 430         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 431         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 432         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 433 };
 434
 435 static const struct nla_policy
 436 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 437         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 438         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 439         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 440         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 441         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 442         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 443         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 444                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 445         },
 446         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 447                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 448         },
 449         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 450         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 451         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 452 };
 453
 454 /* policy for coalesce rule attributes */
 455 static const struct nla_policy
 456 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 457         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 458         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 459         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 460 };
 461
 462 /* policy for GTK rekey offload attributes */
 463 static const struct nla_policy
 464 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 465         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 466         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 467         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 468 };
 469
 470 static const struct nla_policy
 471 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 472         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 473                                                  .len = IEEE80211_MAX_SSID_LEN },
 474         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 475 };
 476
 477 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 478                                      struct netlink_callback *cb,
 479                                      struct cfg80211_registered_device **rdev,
 480                                      struct wireless_dev **wdev)
 481 {
 482         int err;
 483
 484         rtnl_lock();
 485
 486         if (!cb->args[0]) {
 487                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 488                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 489                                   nl80211_policy);
 490                 if (err)
 491                         goto out_unlock;
 492
 493                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 494                                                    nl80211_fam.attrbuf);
 495                 if (IS_ERR(*wdev)) {
 496                         err = PTR_ERR(*wdev);
 497                         goto out_unlock;
 498                 }
 499                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 500                 /* 0 is the first index - add 1 to parse only once */
 501                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 502                 cb->args[1] = (*wdev)->identifier;
 503         } else {
 504                 /* subtract the 1 again here */
 505                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 506                 struct wireless_dev *tmp;
 507
 508                 if (!wiphy) {
 509                         err = -ENODEV;
 510                         goto out_unlock;
 511                 }
 512                 *rdev = wiphy_to_rdev(wiphy);
 513                 *wdev = NULL;
 514
 515                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 516                         if (tmp->identifier == cb->args[1]) {
 517                                 *wdev = tmp;
 518                                 break;
 519                         }
 520                 }
 521
 522                 if (!*wdev) {
 523                         err = -ENODEV;
 524                         goto out_unlock;
 525                 }
 526         }
 527
 528         return 0;
 529  out_unlock:
 530         rtnl_unlock();
 531         return err;
 532 }
 533
 534 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 535 {
 536         rtnl_unlock();
 537 }
 538
 539 /* IE validation */
 540 static bool is_valid_ie_attr(const struct nlattr *attr)
 541 {
 542         const u8 *pos;
 543         int len;
 544
 545         if (!attr)
 546                 return true;
 547
 548         pos = nla_data(attr);
 549         len = nla_len(attr);
 550
 551         while (len) {
 552                 u8 elemlen;
 553
 554                 if (len < 2)
 555                         return false;
 556                 len -= 2;
 557
 558                 elemlen = pos[1];
 559                 if (elemlen > len)
 560                         return false;
 561
 562                 len -= elemlen;
 563                 pos += 2 + elemlen;
 564         }
 565
 566         return true;
 567 }
 568
 569 /* message building helper */
 570 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 571                                    int flags, u8 cmd)
 572 {
 573         /* since there is no private header just add the generic one */
 574         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 575 }
 576
 577 static int nl80211_msg_put_channel(struct sk_buff *msg,
 578                                    struct ieee80211_channel *chan,
 579                                    bool large)
 580 {
 581         /* Some channels must be completely excluded from the
 582          * list to protect old user-space tools from breaking
 583          */
 584         if (!large && chan->flags &
 585             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 586                 return 0;
 587
 588         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 589                         chan->center_freq))
 590                 goto nla_put_failure;
 591
 592         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 593             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 594                 goto nla_put_failure;
 595         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 596                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 597                         goto nla_put_failure;
 598                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 599                         goto nla_put_failure;
 600         }
 601         if (chan->flags & IEEE80211_CHAN_RADAR) {
 602                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 603                         goto nla_put_failure;
 604                 if (large) {
 605                         u32 time;
 606
 607                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 608
 609                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 610                                         chan->dfs_state))
 611                                 goto nla_put_failure;
 612                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 613                                         time))
 614                                 goto nla_put_failure;
 615                         if (nla_put_u32(msg,
 616                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 617                                         chan->dfs_cac_ms))
 618                                 goto nla_put_failure;
 619                 }
 620         }
 621
 622         if (large) {
 623                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 624                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 625                         goto nla_put_failure;
 626                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 627                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 628                         goto nla_put_failure;
 629                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 630                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 631                         goto nla_put_failure;
 632                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 633                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 634                         goto nla_put_failure;
 635                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 636                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 637                         goto nla_put_failure;
 638                 if ((chan->flags & IEEE80211_CHAN_GO_CONCURRENT) &&
 639                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_GO_CONCURRENT))
 640                         goto nla_put_failure;
 641                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 642                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 643                         goto nla_put_failure;
 644                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 645                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 646                         goto nla_put_failure;
 647         }
 648
 649         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 650                         DBM_TO_MBM(chan->max_power)))
 651                 goto nla_put_failure;
 652
 653         return 0;
 654
 655  nla_put_failure:
 656         return -ENOBUFS;
 657 }
 658
 659 /* netlink command implementations */
 660
 661 struct key_parse {
 662         struct key_params p;
 663         int idx;
 664         int type;
 665         bool def, defmgmt;
 666         bool def_uni, def_multi;
 667 };
 668
 669 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 670 {
 671         struct nlattr *tb[NL80211_KEY_MAX + 1];
 672         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 673                                    nl80211_key_policy);
 674         if (err)
 675                 return err;
 676
 677         k->def = !!tb[NL80211_KEY_DEFAULT];
 678         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 679
 680         if (k->def) {
 681                 k->def_uni = true;
 682                 k->def_multi = true;
 683         }
 684         if (k->defmgmt)
 685                 k->def_multi = true;
 686
 687         if (tb[NL80211_KEY_IDX])
 688                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 689
 690         if (tb[NL80211_KEY_DATA]) {
 691                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 692                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 693         }
 694
 695         if (tb[NL80211_KEY_SEQ]) {
 696                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 697                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 698         }
 699
 700         if (tb[NL80211_KEY_CIPHER])
 701                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 702
 703         if (tb[NL80211_KEY_TYPE]) {
 704                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 705                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 706                         return -EINVAL;
 707         }
 708
 709         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 710                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 711                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 712                                        tb[NL80211_KEY_DEFAULT_TYPES],
 713                                        nl80211_key_default_policy);
 714                 if (err)
 715                         return err;
 716
 717                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 718                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 719         }
 720
 721         return 0;
 722 }
 723
 724 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 725 {
 726         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 727                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 728                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 729         }
 730
 731         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 732                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 733                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 734         }
 735
 736         if (info->attrs[NL80211_ATTR_KEY_IDX])
 737                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 738
 739         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 740                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 741
 742         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 743         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 744
 745         if (k->def) {
 746                 k->def_uni = true;
 747                 k->def_multi = true;
 748         }
 749         if (k->defmgmt)
 750                 k->def_multi = true;
 751
 752         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 753                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 754                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 755                         return -EINVAL;
 756         }
 757
 758         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 759                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 760                 int err = nla_parse_nested(
 761                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 762                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 763                                 nl80211_key_default_policy);
 764                 if (err)
 765                         return err;
 766
 767                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 768                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 769         }
 770
 771         return 0;
 772 }
 773
 774 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 775 {
 776         int err;
 777
 778         memset(k, 0, sizeof(*k));
 779         k->idx = -1;
 780         k->type = -1;
 781
 782         if (info->attrs[NL80211_ATTR_KEY])
 783                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 784         else
 785                 err = nl80211_parse_key_old(info, k);
 786
 787         if (err)
 788                 return err;
 789
 790         if (k->def && k->defmgmt)
 791                 return -EINVAL;
 792
 793         if (k->defmgmt) {
 794                 if (k->def_uni || !k->def_multi)
 795                         return -EINVAL;
 796         }
 797
 798         if (k->idx != -1) {
 799                 if (k->defmgmt) {
 800                         if (k->idx < 4 || k->idx > 5)
 801                                 return -EINVAL;
 802                 } else if (k->def) {
 803                         if (k->idx < 0 || k->idx > 3)
 804                                 return -EINVAL;
 805                 } else {
 806                         if (k->idx < 0 || k->idx > 5)
 807                                 return -EINVAL;
 808                 }
 809         }
 810
 811         return 0;
 812 }
 813
 814 static struct cfg80211_cached_keys *
 815 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 816                        struct nlattr *keys, bool *no_ht)
 817 {
 818         struct key_parse parse;
 819         struct nlattr *key;
 820         struct cfg80211_cached_keys *result;
 821         int rem, err, def = 0;
 822
 823         result = kzalloc(sizeof(*result), GFP_KERNEL);
 824         if (!result)
 825                 return ERR_PTR(-ENOMEM);
 826
 827         result->def = -1;
 828         result->defmgmt = -1;
 829
 830         nla_for_each_nested(key, keys, rem) {
 831                 memset(&parse, 0, sizeof(parse));
 832                 parse.idx = -1;
 833
 834                 err = nl80211_parse_key_new(key, &parse);
 835                 if (err)
 836                         goto error;
 837                 err = -EINVAL;
 838                 if (!parse.p.key)
 839                         goto error;
 840                 if (parse.idx < 0 || parse.idx > 4)
 841                         goto error;
 842                 if (parse.def) {
 843                         if (def)
 844                                 goto error;
 845                         def = 1;
 846                         result->def = parse.idx;
 847                         if (!parse.def_uni || !parse.def_multi)
 848                                 goto error;
 849                 } else if (parse.defmgmt)
 850                         goto error;
 851                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 852                                                      parse.idx, false, NULL);
 853                 if (err)
 854                         goto error;
 855                 result->params[parse.idx].cipher = parse.p.cipher;
 856                 result->params[parse.idx].key_len = parse.p.key_len;
 857                 result->params[parse.idx].key = result->data[parse.idx];
 858                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 859
 860                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 861                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 862                         if (no_ht)
 863                                 *no_ht = true;
 864                 }
 865         }
 866
 867         return result;
 868  error:
 869         kfree(result);
 870         return ERR_PTR(err);
 871 }
 872
 873 static int nl80211_key_allowed(struct wireless_dev *wdev)
 874 {
 875         ASSERT_WDEV_LOCK(wdev);
 876
 877         switch (wdev->iftype) {
 878         case NL80211_IFTYPE_AP:
 879         case NL80211_IFTYPE_AP_VLAN:
 880         case NL80211_IFTYPE_P2P_GO:
 881         case NL80211_IFTYPE_MESH_POINT:
 882                 break;
 883         case NL80211_IFTYPE_ADHOC:
 884         case NL80211_IFTYPE_STATION:
 885         case NL80211_IFTYPE_P2P_CLIENT:
 886                 if (!wdev->current_bss)
 887                         return -ENOLINK;
 888                 break;
 889         case NL80211_IFTYPE_UNSPECIFIED:
 890         case NL80211_IFTYPE_OCB:
 891         case NL80211_IFTYPE_MONITOR:
 892         case NL80211_IFTYPE_P2P_DEVICE:
 893         case NL80211_IFTYPE_WDS:
 894         case NUM_NL80211_IFTYPES:
 895                 return -EINVAL;
 896         }
 897
 898         return 0;
 899 }
 900
 901 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 902                                                         struct nlattr *tb)
 903 {
 904         struct ieee80211_channel *chan;
 905
 906         if (tb == NULL)
 907                 return NULL;
 908         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 909         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 910                 return NULL;
 911         return chan;
 912 }
 913
 914 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 915 {
 916         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 917         int i;
 918
 919         if (!nl_modes)
 920                 goto nla_put_failure;
 921
 922         i = 0;
 923         while (ifmodes) {
 924                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 925                         goto nla_put_failure;
 926                 ifmodes >>= 1;
 927                 i++;
 928         }
 929
 930         nla_nest_end(msg, nl_modes);
 931         return 0;
 932
 933 nla_put_failure:
 934         return -ENOBUFS;
 935 }
 936
 937 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 938                                           struct sk_buff *msg,
 939                                           bool large)
 940 {
 941         struct nlattr *nl_combis;
 942         int i, j;
 943
 944         nl_combis = nla_nest_start(msg,
 945                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 946         if (!nl_combis)
 947                 goto nla_put_failure;
 948
 949         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 950                 const struct ieee80211_iface_combination *c;
 951                 struct nlattr *nl_combi, *nl_limits;
 952
 953                 c = &wiphy->iface_combinations[i];
 954
 955                 nl_combi = nla_nest_start(msg, i + 1);
 956                 if (!nl_combi)
 957                         goto nla_put_failure;
 958
 959                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 960                 if (!nl_limits)
 961                         goto nla_put_failure;
 962
 963                 for (j = 0; j < c->n_limits; j++) {
 964                         struct nlattr *nl_limit;
 965
 966                         nl_limit = nla_nest_start(msg, j + 1);
 967                         if (!nl_limit)
 968                                 goto nla_put_failure;
 969                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 970                                         c->limits[j].max))
 971                                 goto nla_put_failure;
 972                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 973                                                 c->limits[j].types))
 974                                 goto nla_put_failure;
 975                         nla_nest_end(msg, nl_limit);
 976                 }
 977
 978                 nla_nest_end(msg, nl_limits);
 979
 980                 if (c->beacon_int_infra_match &&
 981                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 982                         goto nla_put_failure;
 983                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 984                                 c->num_different_channels) ||
 985                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 986                                 c->max_interfaces))
 987                         goto nla_put_failure;
 988                 if (large &&
 989                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 990                                 c->radar_detect_widths) ||
 991                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
 992                                 c->radar_detect_regions)))
 993                         goto nla_put_failure;
 994
 995                 nla_nest_end(msg, nl_combi);
 996         }
 997
 998         nla_nest_end(msg, nl_combis);
 999
1000         return 0;
1001 nla_put_failure:
1002         return -ENOBUFS;
1003 }
1004
1005 #ifdef CONFIG_PM
1006 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1007                                         struct sk_buff *msg)
1008 {
1009         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1010         struct nlattr *nl_tcp;
1011
1012         if (!tcp)
1013                 return 0;
1014
1015         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1016         if (!nl_tcp)
1017                 return -ENOBUFS;
1018
1019         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1020                         tcp->data_payload_max))
1021                 return -ENOBUFS;
1022
1023         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1024                         tcp->data_payload_max))
1025                 return -ENOBUFS;
1026
1027         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1028                 return -ENOBUFS;
1029
1030         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1031                                 sizeof(*tcp->tok), tcp->tok))
1032                 return -ENOBUFS;
1033
1034         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1035                         tcp->data_interval_max))
1036                 return -ENOBUFS;
1037
1038         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1039                         tcp->wake_payload_max))
1040                 return -ENOBUFS;
1041
1042         nla_nest_end(msg, nl_tcp);
1043         return 0;
1044 }
1045
1046 static int nl80211_send_wowlan(struct sk_buff *msg,
1047                                struct cfg80211_registered_device *rdev,
1048                                bool large)
1049 {
1050         struct nlattr *nl_wowlan;
1051
1052         if (!rdev->wiphy.wowlan)
1053                 return 0;
1054
1055         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1056         if (!nl_wowlan)
1057                 return -ENOBUFS;
1058
1059         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1060              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1061             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1062              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1063             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1064              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1065             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1066              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1067             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1068              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1069             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1070              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1071             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1072              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1073             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1074              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1075                 return -ENOBUFS;
1076
1077         if (rdev->wiphy.wowlan->n_patterns) {
1078                 struct nl80211_pattern_support pat = {
1079                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1080                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1081                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1082                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1083                 };
1084
1085                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1086                             sizeof(pat), &pat))
1087                         return -ENOBUFS;
1088         }
1089
1090         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1091                 return -ENOBUFS;
1092
1093         /* TODO: send wowlan net detect */
1094
1095         nla_nest_end(msg, nl_wowlan);
1096
1097         return 0;
1098 }
1099 #endif
1100
1101 static int nl80211_send_coalesce(struct sk_buff *msg,
1102                                  struct cfg80211_registered_device *rdev)
1103 {
1104         struct nl80211_coalesce_rule_support rule;
1105
1106         if (!rdev->wiphy.coalesce)
1107                 return 0;
1108
1109         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1110         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1111         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1112         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1113         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1114         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1115
1116         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1117                 return -ENOBUFS;
1118
1119         return 0;
1120 }
1121
1122 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1123                                       struct ieee80211_supported_band *sband)
1124 {
1125         struct nlattr *nl_rates, *nl_rate;
1126         struct ieee80211_rate *rate;
1127         int i;
1128
1129         /* add HT info */
1130         if (sband->ht_cap.ht_supported &&
1131             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1132                      sizeof(sband->ht_cap.mcs),
1133                      &sband->ht_cap.mcs) ||
1134              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1135                          sband->ht_cap.cap) ||
1136              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1137                         sband->ht_cap.ampdu_factor) ||
1138              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1139                         sband->ht_cap.ampdu_density)))
1140                 return -ENOBUFS;
1141
1142         /* add VHT info */
1143         if (sband->vht_cap.vht_supported &&
1144             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1145                      sizeof(sband->vht_cap.vht_mcs),
1146                      &sband->vht_cap.vht_mcs) ||
1147              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1148                          sband->vht_cap.cap)))
1149                 return -ENOBUFS;
1150
1151         /* add bitrates */
1152         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1153         if (!nl_rates)
1154                 return -ENOBUFS;
1155
1156         for (i = 0; i < sband->n_bitrates; i++) {
1157                 nl_rate = nla_nest_start(msg, i);
1158                 if (!nl_rate)
1159                         return -ENOBUFS;
1160
1161                 rate = &sband->bitrates[i];
1162                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1163                                 rate->bitrate))
1164                         return -ENOBUFS;
1165                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1166                     nla_put_flag(msg,
1167                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1168                         return -ENOBUFS;
1169
1170                 nla_nest_end(msg, nl_rate);
1171         }
1172
1173         nla_nest_end(msg, nl_rates);
1174
1175         return 0;
1176 }
1177
1178 static int
1179 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1180                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1181 {
1182         u16 stypes;
1183         struct nlattr *nl_ftypes, *nl_ifs;
1184         enum nl80211_iftype ift;
1185         int i;
1186
1187         if (!mgmt_stypes)
1188                 return 0;
1189
1190         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1191         if (!nl_ifs)
1192                 return -ENOBUFS;
1193
1194         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1195                 nl_ftypes = nla_nest_start(msg, ift);
1196                 if (!nl_ftypes)
1197                         return -ENOBUFS;
1198                 i = 0;
1199                 stypes = mgmt_stypes[ift].tx;
1200                 while (stypes) {
1201                         if ((stypes & 1) &&
1202                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1203                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1204                                 return -ENOBUFS;
1205                         stypes >>= 1;
1206                         i++;
1207                 }
1208                 nla_nest_end(msg, nl_ftypes);
1209         }
1210
1211         nla_nest_end(msg, nl_ifs);
1212
1213         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1214         if (!nl_ifs)
1215                 return -ENOBUFS;
1216
1217         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1218                 nl_ftypes = nla_nest_start(msg, ift);
1219                 if (!nl_ftypes)
1220                         return -ENOBUFS;
1221                 i = 0;
1222                 stypes = mgmt_stypes[ift].rx;
1223                 while (stypes) {
1224                         if ((stypes & 1) &&
1225                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1226                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1227                                 return -ENOBUFS;
1228                         stypes >>= 1;
1229                         i++;
1230                 }
1231                 nla_nest_end(msg, nl_ftypes);
1232         }
1233         nla_nest_end(msg, nl_ifs);
1234
1235         return 0;
1236 }
1237
1238 struct nl80211_dump_wiphy_state {
1239         s64 filter_wiphy;
1240         long start;
1241         long split_start, band_start, chan_start;
1242         bool split;
1243 };
1244
1245 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1246                               enum nl80211_commands cmd,
1247                               struct sk_buff *msg, u32 portid, u32 seq,
1248                               int flags, struct nl80211_dump_wiphy_state *state)
1249 {
1250         void *hdr;
1251         struct nlattr *nl_bands, *nl_band;
1252         struct nlattr *nl_freqs, *nl_freq;
1253         struct nlattr *nl_cmds;
1254         enum ieee80211_band band;
1255         struct ieee80211_channel *chan;
1256         int i;
1257         const struct ieee80211_txrx_stypes *mgmt_stypes =
1258                                 rdev->wiphy.mgmt_stypes;
1259         u32 features;
1260
1261         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1262         if (!hdr)
1263                 return -ENOBUFS;
1264
1265         if (WARN_ON(!state))
1266                 return -EINVAL;
1267
1268         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1269             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1270                            wiphy_name(&rdev->wiphy)) ||
1271             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1272                         cfg80211_rdev_list_generation))
1273                 goto nla_put_failure;
1274
1275         if (cmd != NL80211_CMD_NEW_WIPHY)
1276                 goto finish;
1277
1278         switch (state->split_start) {
1279         case 0:
1280                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1281                                rdev->wiphy.retry_short) ||
1282                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1283                                rdev->wiphy.retry_long) ||
1284                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1285                                 rdev->wiphy.frag_threshold) ||
1286                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1287                                 rdev->wiphy.rts_threshold) ||
1288                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1289                                rdev->wiphy.coverage_class) ||
1290                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1291                                rdev->wiphy.max_scan_ssids) ||
1292                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1293                                rdev->wiphy.max_sched_scan_ssids) ||
1294                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1295                                 rdev->wiphy.max_scan_ie_len) ||
1296                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1297                                 rdev->wiphy.max_sched_scan_ie_len) ||
1298                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1299                                rdev->wiphy.max_match_sets))
1300                         goto nla_put_failure;
1301
1302                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1303                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1304                         goto nla_put_failure;
1305                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1306                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1307                         goto nla_put_failure;
1308                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1309                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1310                         goto nla_put_failure;
1311                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1312                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1313                         goto nla_put_failure;
1314                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1315                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1316                         goto nla_put_failure;
1317                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1318                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1319                         goto nla_put_failure;
1320                 state->split_start++;
1321                 if (state->split)
1322                         break;
1323         case 1:
1324                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1325                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1326                             rdev->wiphy.cipher_suites))
1327                         goto nla_put_failure;
1328
1329                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1330                                rdev->wiphy.max_num_pmkids))
1331                         goto nla_put_failure;
1332
1333                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1334                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1335                         goto nla_put_failure;
1336
1337                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1338                                 rdev->wiphy.available_antennas_tx) ||
1339                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1340                                 rdev->wiphy.available_antennas_rx))
1341                         goto nla_put_failure;
1342
1343                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1344                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1345                                 rdev->wiphy.probe_resp_offload))
1346                         goto nla_put_failure;
1347
1348                 if ((rdev->wiphy.available_antennas_tx ||
1349                      rdev->wiphy.available_antennas_rx) &&
1350                     rdev->ops->get_antenna) {
1351                         u32 tx_ant = 0, rx_ant = 0;
1352                         int res;
1353                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1354                         if (!res) {
1355                                 if (nla_put_u32(msg,
1356                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1357                                                 tx_ant) ||
1358                                     nla_put_u32(msg,
1359                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1360                                                 rx_ant))
1361                                         goto nla_put_failure;
1362                         }
1363                 }
1364
1365                 state->split_start++;
1366                 if (state->split)
1367                         break;
1368         case 2:
1369                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1370                                         rdev->wiphy.interface_modes))
1371                                 goto nla_put_failure;
1372                 state->split_start++;
1373                 if (state->split)
1374                         break;
1375         case 3:
1376                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1377                 if (!nl_bands)
1378                         goto nla_put_failure;
1379
1380                 for (band = state->band_start;
1381                      band < IEEE80211_NUM_BANDS; band++) {
1382                         struct ieee80211_supported_band *sband;
1383
1384                         sband = rdev->wiphy.bands[band];
1385
1386                         if (!sband)
1387                                 continue;
1388
1389                         nl_band = nla_nest_start(msg, band);
1390                         if (!nl_band)
1391                                 goto nla_put_failure;
1392
1393                         switch (state->chan_start) {
1394                         case 0:
1395                                 if (nl80211_send_band_rateinfo(msg, sband))
1396                                         goto nla_put_failure;
1397                                 state->chan_start++;
1398                                 if (state->split)
1399                                         break;
1400                         default:
1401                                 /* add frequencies */
1402                                 nl_freqs = nla_nest_start(
1403                                         msg, NL80211_BAND_ATTR_FREQS);
1404                                 if (!nl_freqs)
1405                                         goto nla_put_failure;
1406
1407                                 for (i = state->chan_start - 1;
1408                                      i < sband->n_channels;
1409                                      i++) {
1410                                         nl_freq = nla_nest_start(msg, i);
1411                                         if (!nl_freq)
1412                                                 goto nla_put_failure;
1413
1414                                         chan = &sband->channels[i];
1415
1416                                         if (nl80211_msg_put_channel(
1417                                                         msg, chan,
1418                                                         state->split))
1419                                                 goto nla_put_failure;
1420
1421                                         nla_nest_end(msg, nl_freq);
1422                                         if (state->split)
1423                                                 break;
1424                                 }
1425                                 if (i < sband->n_channels)
1426                                         state->chan_start = i + 2;
1427                                 else
1428                                         state->chan_start = 0;
1429                                 nla_nest_end(msg, nl_freqs);
1430                         }
1431
1432                         nla_nest_end(msg, nl_band);
1433
1434                         if (state->split) {
1435                                 /* start again here */
1436                                 if (state->chan_start)
1437                                         band--;
1438                                 break;
1439                         }
1440                 }
1441                 nla_nest_end(msg, nl_bands);
1442
1443                 if (band < IEEE80211_NUM_BANDS)
1444                         state->band_start = band + 1;
1445                 else
1446                         state->band_start = 0;
1447
1448                 /* if bands & channels are done, continue outside */
1449                 if (state->band_start == 0 && state->chan_start == 0)
1450                         state->split_start++;
1451                 if (state->split)
1452                         break;
1453         case 4:
1454                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1455                 if (!nl_cmds)
1456                         goto nla_put_failure;
1457
1458                 i = 0;
1459 #define CMD(op, n)                                                      \
1460                  do {                                                   \
1461                         if (rdev->ops->op) {                            \
1462                                 i++;                                    \
1463                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1464                                         goto nla_put_failure;           \
1465                         }                                               \
1466                 } while (0)
1467
1468                 CMD(add_virtual_intf, NEW_INTERFACE);
1469                 CMD(change_virtual_intf, SET_INTERFACE);
1470                 CMD(add_key, NEW_KEY);
1471                 CMD(start_ap, START_AP);
1472                 CMD(add_station, NEW_STATION);
1473                 CMD(add_mpath, NEW_MPATH);
1474                 CMD(update_mesh_config, SET_MESH_CONFIG);
1475                 CMD(change_bss, SET_BSS);
1476                 CMD(auth, AUTHENTICATE);
1477                 CMD(assoc, ASSOCIATE);
1478                 CMD(deauth, DEAUTHENTICATE);
1479                 CMD(disassoc, DISASSOCIATE);
1480                 CMD(join_ibss, JOIN_IBSS);
1481                 CMD(join_mesh, JOIN_MESH);
1482                 CMD(set_pmksa, SET_PMKSA);
1483                 CMD(del_pmksa, DEL_PMKSA);
1484                 CMD(flush_pmksa, FLUSH_PMKSA);
1485                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1486                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1487                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1488                 CMD(mgmt_tx, FRAME);
1489                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1490                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1491                         i++;
1492                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1493                                 goto nla_put_failure;
1494                 }
1495                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1496                     rdev->ops->join_mesh) {
1497                         i++;
1498                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1499                                 goto nla_put_failure;
1500                 }
1501                 CMD(set_wds_peer, SET_WDS_PEER);
1502                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1503                         CMD(tdls_mgmt, TDLS_MGMT);
1504                         CMD(tdls_oper, TDLS_OPER);
1505                 }
1506                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1507                         CMD(sched_scan_start, START_SCHED_SCAN);
1508                 CMD(probe_client, PROBE_CLIENT);
1509                 CMD(set_noack_map, SET_NOACK_MAP);
1510                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1511                         i++;
1512                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1513                                 goto nla_put_failure;
1514                 }
1515                 CMD(start_p2p_device, START_P2P_DEVICE);
1516                 CMD(set_mcast_rate, SET_MCAST_RATE);
1517 #ifdef CONFIG_NL80211_TESTMODE
1518                 CMD(testmode_cmd, TESTMODE);
1519 #endif
1520                 if (state->split) {
1521                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1522                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1523                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1524                                 CMD(channel_switch, CHANNEL_SWITCH);
1525                         CMD(set_qos_map, SET_QOS_MAP);
1526                         if (rdev->wiphy.features &
1527                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1528                                 CMD(add_tx_ts, ADD_TX_TS);
1529                 }
1530                 /* add into the if now */
1531 #undef CMD
1532
1533                 if (rdev->ops->connect || rdev->ops->auth) {
1534                         i++;
1535                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1536                                 goto nla_put_failure;
1537                 }
1538
1539                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1540                         i++;
1541                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1542                                 goto nla_put_failure;
1543                 }
1544
1545                 nla_nest_end(msg, nl_cmds);
1546                 state->split_start++;
1547                 if (state->split)
1548                         break;
1549         case 5:
1550                 if (rdev->ops->remain_on_channel &&
1551                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1552                     nla_put_u32(msg,
1553                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1554                                 rdev->wiphy.max_remain_on_channel_duration))
1555                         goto nla_put_failure;
1556
1557                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1558                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1559                         goto nla_put_failure;
1560
1561                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1562                         goto nla_put_failure;
1563                 state->split_start++;
1564                 if (state->split)
1565                         break;
1566         case 6:
1567 #ifdef CONFIG_PM
1568                 if (nl80211_send_wowlan(msg, rdev, state->split))
1569                         goto nla_put_failure;
1570                 state->split_start++;
1571                 if (state->split)
1572                         break;
1573 #else
1574                 state->split_start++;
1575 #endif
1576         case 7:
1577                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1578                                         rdev->wiphy.software_iftypes))
1579                         goto nla_put_failure;
1580
1581                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1582                                                    state->split))
1583                         goto nla_put_failure;
1584
1585                 state->split_start++;
1586                 if (state->split)
1587                         break;
1588         case 8:
1589                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1590                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1591                                 rdev->wiphy.ap_sme_capa))
1592                         goto nla_put_failure;
1593
1594                 features = rdev->wiphy.features;
1595                 /*
1596                  * We can only add the per-channel limit information if the
1597                  * dump is split, otherwise it makes it too big. Therefore
1598                  * only advertise it in that case.
1599                  */
1600                 if (state->split)
1601                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1602                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1603                         goto nla_put_failure;
1604
1605                 if (rdev->wiphy.ht_capa_mod_mask &&
1606                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1607                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1608                             rdev->wiphy.ht_capa_mod_mask))
1609                         goto nla_put_failure;
1610
1611                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1612                     rdev->wiphy.max_acl_mac_addrs &&
1613                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1614                                 rdev->wiphy.max_acl_mac_addrs))
1615                         goto nla_put_failure;
1616
1617                 /*
1618                  * Any information below this point is only available to
1619                  * applications that can deal with it being split. This
1620                  * helps ensure that newly added capabilities don't break
1621                  * older tools by overrunning their buffers.
1622                  *
1623                  * We still increment split_start so that in the split
1624                  * case we'll continue with more data in the next round,
1625                  * but break unconditionally so unsplit data stops here.
1626                  */
1627                 state->split_start++;
1628                 break;
1629         case 9:
1630                 if (rdev->wiphy.extended_capabilities &&
1631                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1632                              rdev->wiphy.extended_capabilities_len,
1633                              rdev->wiphy.extended_capabilities) ||
1634                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1635                              rdev->wiphy.extended_capabilities_len,
1636                              rdev->wiphy.extended_capabilities_mask)))
1637                         goto nla_put_failure;
1638
1639                 if (rdev->wiphy.vht_capa_mod_mask &&
1640                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1641                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1642                             rdev->wiphy.vht_capa_mod_mask))
1643                         goto nla_put_failure;
1644
1645                 state->split_start++;
1646                 break;
1647         case 10:
1648                 if (nl80211_send_coalesce(msg, rdev))
1649                         goto nla_put_failure;
1650
1651                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1652                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1653                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1654                         goto nla_put_failure;
1655
1656                 if (rdev->wiphy.max_ap_assoc_sta &&
1657                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1658                                 rdev->wiphy.max_ap_assoc_sta))
1659                         goto nla_put_failure;
1660
1661                 state->split_start++;
1662                 break;
1663         case 11:
1664                 if (rdev->wiphy.n_vendor_commands) {
1665                         const struct nl80211_vendor_cmd_info *info;
1666                         struct nlattr *nested;
1667
1668                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1669                         if (!nested)
1670                                 goto nla_put_failure;
1671
1672                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1673                                 info = &rdev->wiphy.vendor_commands[i].info;
1674                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1675                                         goto nla_put_failure;
1676                         }
1677                         nla_nest_end(msg, nested);
1678                 }
1679
1680                 if (rdev->wiphy.n_vendor_events) {
1681                         const struct nl80211_vendor_cmd_info *info;
1682                         struct nlattr *nested;
1683
1684                         nested = nla_nest_start(msg,
1685                                                 NL80211_ATTR_VENDOR_EVENTS);
1686                         if (!nested)
1687                                 goto nla_put_failure;
1688
1689                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1690                                 info = &rdev->wiphy.vendor_events[i];
1691                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1692                                         goto nla_put_failure;
1693                         }
1694                         nla_nest_end(msg, nested);
1695                 }
1696                 state->split_start++;
1697                 break;
1698         case 12:
1699                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1700                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1701                                rdev->wiphy.max_num_csa_counters))
1702                         goto nla_put_failure;
1703
1704                 /* done */
1705                 state->split_start = 0;
1706                 break;
1707         }
1708  finish:
1709         return genlmsg_end(msg, hdr);
1710
1711  nla_put_failure:
1712         genlmsg_cancel(msg, hdr);
1713         return -EMSGSIZE;
1714 }
1715
1716 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1717                                     struct netlink_callback *cb,
1718                                     struct nl80211_dump_wiphy_state *state)
1719 {
1720         struct nlattr **tb = nl80211_fam.attrbuf;
1721         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1722                               tb, nl80211_fam.maxattr, nl80211_policy);
1723         /* ignore parse errors for backward compatibility */
1724         if (ret)
1725                 return 0;
1726
1727         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1728         if (tb[NL80211_ATTR_WIPHY])
1729                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1730         if (tb[NL80211_ATTR_WDEV])
1731                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1732         if (tb[NL80211_ATTR_IFINDEX]) {
1733                 struct net_device *netdev;
1734                 struct cfg80211_registered_device *rdev;
1735                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1736
1737                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1738                 if (!netdev)
1739                         return -ENODEV;
1740                 if (netdev->ieee80211_ptr) {
1741                         rdev = wiphy_to_rdev(
1742                                 netdev->ieee80211_ptr->wiphy);
1743                         state->filter_wiphy = rdev->wiphy_idx;
1744                 }
1745         }
1746
1747         return 0;
1748 }
1749
1750 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1751 {
1752         int idx = 0, ret;
1753         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1754         struct cfg80211_registered_device *rdev;
1755
1756         rtnl_lock();
1757         if (!state) {
1758                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1759                 if (!state) {
1760                         rtnl_unlock();
1761                         return -ENOMEM;
1762                 }
1763                 state->filter_wiphy = -1;
1764                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1765                 if (ret) {
1766                         kfree(state);
1767                         rtnl_unlock();
1768                         return ret;
1769                 }
1770                 cb->args[0] = (long)state;
1771         }
1772
1773         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1774                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1775                         continue;
1776                 if (++idx <= state->start)
1777                         continue;
1778                 if (state->filter_wiphy != -1 &&
1779                     state->filter_wiphy != rdev->wiphy_idx)
1780                         continue;
1781                 /* attempt to fit multiple wiphy data chunks into the skb */
1782                 do {
1783                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1784                                                  skb,
1785                                                  NETLINK_CB(cb->skb).portid,
1786                                                  cb->nlh->nlmsg_seq,
1787                                                  NLM_F_MULTI, state);
1788                         if (ret < 0) {
1789                                 /*
1790                                  * If sending the wiphy data didn't fit (ENOBUFS
1791                                  * or EMSGSIZE returned), this SKB is still
1792                                  * empty (so it's not too big because another
1793                                  * wiphy dataset is already in the skb) and
1794                                  * we've not tried to adjust the dump allocation
1795                                  * yet ... then adjust the alloc size to be
1796                                  * bigger, and return 1 but with the empty skb.
1797                                  * This results in an empty message being RX'ed
1798                                  * in userspace, but that is ignored.
1799                                  *
1800                                  * We can then retry with the larger buffer.
1801                                  */
1802                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1803                                     !skb->len && !state->split &&
1804                                     cb->min_dump_alloc < 4096) {
1805                                         cb->min_dump_alloc = 4096;
1806                                         state->split_start = 0;
1807                                         rtnl_unlock();
1808                                         return 1;
1809                                 }
1810                                 idx--;
1811                                 break;
1812                         }
1813                 } while (state->split_start > 0);
1814                 break;
1815         }
1816         rtnl_unlock();
1817
1818         state->start = idx;
1819
1820         return skb->len;
1821 }
1822
1823 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1824 {
1825         kfree((void *)cb->args[0]);
1826         return 0;
1827 }
1828
1829 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1830 {
1831         struct sk_buff *msg;
1832         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1833         struct nl80211_dump_wiphy_state state = {};
1834
1835         msg = nlmsg_new(4096, GFP_KERNEL);
1836         if (!msg)
1837                 return -ENOMEM;
1838
1839         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1840                                info->snd_portid, info->snd_seq, 0,
1841                                &state) < 0) {
1842                 nlmsg_free(msg);
1843                 return -ENOBUFS;
1844         }
1845
1846         return genlmsg_reply(msg, info);
1847 }
1848
1849 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1850         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1851         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1852         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1853         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1854         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1855 };
1856
1857 static int parse_txq_params(struct nlattr *tb[],
1858                             struct ieee80211_txq_params *txq_params)
1859 {
1860         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1861             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1862             !tb[NL80211_TXQ_ATTR_AIFS])
1863                 return -EINVAL;
1864
1865         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1866         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1867         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1868         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1869         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1870
1871         if (txq_params->ac >= NL80211_NUM_ACS)
1872                 return -EINVAL;
1873
1874         return 0;
1875 }
1876
1877 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1878 {
1879         /*
1880          * You can only set the channel explicitly for WDS interfaces,
1881          * all others have their channel managed via their respective
1882          * "establish a connection" command (connect, join, ...)
1883          *
1884          * For AP/GO and mesh mode, the channel can be set with the
1885          * channel userspace API, but is only stored and passed to the
1886          * low-level driver when the AP starts or the mesh is joined.
1887          * This is for backward compatibility, userspace can also give
1888          * the channel in the start-ap or join-mesh commands instead.
1889          *
1890          * Monitors are special as they are normally slaved to
1891          * whatever else is going on, so they have their own special
1892          * operation to set the monitor channel if possible.
1893          */
1894         return !wdev ||
1895                 wdev->iftype == NL80211_IFTYPE_AP ||
1896                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1897                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1898                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1899 }
1900
1901 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1902                                  struct genl_info *info,
1903                                  struct cfg80211_chan_def *chandef)
1904 {
1905         u32 control_freq;
1906
1907         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1908                 return -EINVAL;
1909
1910         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1911
1912         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1913         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1914         chandef->center_freq1 = control_freq;
1915         chandef->center_freq2 = 0;
1916
1917         /* Primary channel not allowed */
1918         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1919                 return -EINVAL;
1920
1921         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1922                 enum nl80211_channel_type chantype;
1923
1924                 chantype = nla_get_u32(
1925                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1926
1927                 switch (chantype) {
1928                 case NL80211_CHAN_NO_HT:
1929                 case NL80211_CHAN_HT20:
1930                 case NL80211_CHAN_HT40PLUS:
1931                 case NL80211_CHAN_HT40MINUS:
1932                         cfg80211_chandef_create(chandef, chandef->chan,
1933                                                 chantype);
1934                         break;
1935                 default:
1936                         return -EINVAL;
1937                 }
1938         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1939                 chandef->width =
1940                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1941                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1942                         chandef->center_freq1 =
1943                                 nla_get_u32(
1944                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1945                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1946                         chandef->center_freq2 =
1947                                 nla_get_u32(
1948                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1949         }
1950
1951         if (!cfg80211_chandef_valid(chandef))
1952                 return -EINVAL;
1953
1954         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1955                                      IEEE80211_CHAN_DISABLED))
1956                 return -EINVAL;
1957
1958         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1959              chandef->width == NL80211_CHAN_WIDTH_10) &&
1960             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1961                 return -EINVAL;
1962
1963         return 0;
1964 }
1965
1966 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1967                                  struct net_device *dev,
1968                                  struct genl_info *info)
1969 {
1970         struct cfg80211_chan_def chandef;
1971         int result;
1972         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1973         struct wireless_dev *wdev = NULL;
1974
1975         if (dev)
1976                 wdev = dev->ieee80211_ptr;
1977         if (!nl80211_can_set_dev_channel(wdev))
1978                 return -EOPNOTSUPP;
1979         if (wdev)
1980                 iftype = wdev->iftype;
1981
1982         result = nl80211_parse_chandef(rdev, info, &chandef);
1983         if (result)
1984                 return result;
1985
1986         switch (iftype) {
1987         case NL80211_IFTYPE_AP:
1988         case NL80211_IFTYPE_P2P_GO:
1989                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, iftype)) {
1990                         result = -EINVAL;
1991                         break;
1992                 }
1993                 if (wdev->beacon_interval) {
1994                         if (!dev || !rdev->ops->set_ap_chanwidth ||
1995                             !(rdev->wiphy.features &
1996                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
1997                                 result = -EBUSY;
1998                                 break;
1999                         }
2000
2001                         /* Only allow dynamic channel width changes */
2002                         if (chandef.chan != wdev->preset_chandef.chan) {
2003                                 result = -EBUSY;
2004                                 break;
2005                         }
2006                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2007                         if (result)
2008                                 break;
2009                 }
2010                 wdev->preset_chandef = chandef;
2011                 result = 0;
2012                 break;
2013         case NL80211_IFTYPE_MESH_POINT:
2014                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2015                 break;
2016         case NL80211_IFTYPE_MONITOR:
2017                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2018                 break;
2019         default:
2020                 result = -EINVAL;
2021         }
2022
2023         return result;
2024 }
2025
2026 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2027 {
2028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2029         struct net_device *netdev = info->user_ptr[1];
2030
2031         return __nl80211_set_channel(rdev, netdev, info);
2032 }
2033
2034 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2035 {
2036         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2037         struct net_device *dev = info->user_ptr[1];
2038         struct wireless_dev *wdev = dev->ieee80211_ptr;
2039         const u8 *bssid;
2040
2041         if (!info->attrs[NL80211_ATTR_MAC])
2042                 return -EINVAL;
2043
2044         if (netif_running(dev))
2045                 return -EBUSY;
2046
2047         if (!rdev->ops->set_wds_peer)
2048                 return -EOPNOTSUPP;
2049
2050         if (wdev->iftype != NL80211_IFTYPE_WDS)
2051                 return -EOPNOTSUPP;
2052
2053         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2054         return rdev_set_wds_peer(rdev, dev, bssid);
2055 }
2056
2057
2058 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2059 {
2060         struct cfg80211_registered_device *rdev;
2061         struct net_device *netdev = NULL;
2062         struct wireless_dev *wdev;
2063         int result = 0, rem_txq_params = 0;
2064         struct nlattr *nl_txq_params;
2065         u32 changed;
2066         u8 retry_short = 0, retry_long = 0;
2067         u32 frag_threshold = 0, rts_threshold = 0;
2068         u8 coverage_class = 0;
2069
2070         ASSERT_RTNL();
2071
2072         /*
2073          * Try to find the wiphy and netdev. Normally this
2074          * function shouldn't need the netdev, but this is
2075          * done for backward compatibility -- previously
2076          * setting the channel was done per wiphy, but now
2077          * it is per netdev. Previous userland like hostapd
2078          * also passed a netdev to set_wiphy, so that it is
2079          * possible to let that go to the right netdev!
2080          */
2081
2082         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2083                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2084
2085                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2086                 if (netdev && netdev->ieee80211_ptr)
2087                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2088                 else
2089                         netdev = NULL;
2090         }
2091
2092         if (!netdev) {
2093                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2094                                                   info->attrs);
2095                 if (IS_ERR(rdev))
2096                         return PTR_ERR(rdev);
2097                 wdev = NULL;
2098                 netdev = NULL;
2099                 result = 0;
2100         } else
2101                 wdev = netdev->ieee80211_ptr;
2102
2103         /*
2104          * end workaround code, by now the rdev is available
2105          * and locked, and wdev may or may not be NULL.
2106          */
2107
2108         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2109                 result = cfg80211_dev_rename(
2110                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2111
2112         if (result)
2113                 return result;
2114
2115         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2116                 struct ieee80211_txq_params txq_params;
2117                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2118
2119                 if (!rdev->ops->set_txq_params)
2120                         return -EOPNOTSUPP;
2121
2122                 if (!netdev)
2123                         return -EINVAL;
2124
2125                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2126                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2127                         return -EINVAL;
2128
2129                 if (!netif_running(netdev))
2130                         return -ENETDOWN;
2131
2132                 nla_for_each_nested(nl_txq_params,
2133                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2134                                     rem_txq_params) {
2135                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2136                                            nla_data(nl_txq_params),
2137                                            nla_len(nl_txq_params),
2138                                            txq_params_policy);
2139                         if (result)
2140                                 return result;
2141                         result = parse_txq_params(tb, &txq_params);
2142                         if (result)
2143                                 return result;
2144
2145                         result = rdev_set_txq_params(rdev, netdev,
2146                                                      &txq_params);
2147                         if (result)
2148                                 return result;
2149                 }
2150         }
2151
2152         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2153                 result = __nl80211_set_channel(
2154                         rdev,
2155                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2156                         info);
2157                 if (result)
2158                         return result;
2159         }
2160
2161         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2162                 struct wireless_dev *txp_wdev = wdev;
2163                 enum nl80211_tx_power_setting type;
2164                 int idx, mbm = 0;
2165
2166                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2167                         txp_wdev = NULL;
2168
2169                 if (!rdev->ops->set_tx_power)
2170                         return -EOPNOTSUPP;
2171
2172                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2173                 type = nla_get_u32(info->attrs[idx]);
2174
2175                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2176                     (type != NL80211_TX_POWER_AUTOMATIC))
2177                         return -EINVAL;
2178
2179                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2180                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2181                         mbm = nla_get_u32(info->attrs[idx]);
2182                 }
2183
2184                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2185                 if (result)
2186                         return result;
2187         }
2188
2189         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2190             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2191                 u32 tx_ant, rx_ant;
2192                 if ((!rdev->wiphy.available_antennas_tx &&
2193                      !rdev->wiphy.available_antennas_rx) ||
2194                     !rdev->ops->set_antenna)
2195                         return -EOPNOTSUPP;
2196
2197                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2198                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2199
2200                 /* reject antenna configurations which don't match the
2201                  * available antenna masks, except for the "all" mask */
2202                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2203                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2204                         return -EINVAL;
2205
2206                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2207                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2208
2209                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2210                 if (result)
2211                         return result;
2212         }
2213
2214         changed = 0;
2215
2216         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2217                 retry_short = nla_get_u8(
2218                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2219                 if (retry_short == 0)
2220                         return -EINVAL;
2221
2222                 changed |= WIPHY_PARAM_RETRY_SHORT;
2223         }
2224
2225         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2226                 retry_long = nla_get_u8(
2227                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2228                 if (retry_long == 0)
2229                         return -EINVAL;
2230
2231                 changed |= WIPHY_PARAM_RETRY_LONG;
2232         }
2233
2234         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2235                 frag_threshold = nla_get_u32(
2236                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2237                 if (frag_threshold < 256)
2238                         return -EINVAL;
2239
2240                 if (frag_threshold != (u32) -1) {
2241                         /*
2242                          * Fragments (apart from the last one) are required to
2243                          * have even length. Make the fragmentation code
2244                          * simpler by stripping LSB should someone try to use
2245                          * odd threshold value.
2246                          */
2247                         frag_threshold &= ~0x1;
2248                 }
2249                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2250         }
2251
2252         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2253                 rts_threshold = nla_get_u32(
2254                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2255                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2256         }
2257
2258         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2259                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2260                         return -EINVAL;
2261
2262                 coverage_class = nla_get_u8(
2263                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2264                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2265         }
2266
2267         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2268                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2269                         return -EOPNOTSUPP;
2270
2271                 changed |= WIPHY_PARAM_DYN_ACK;
2272         }
2273
2274         if (changed) {
2275                 u8 old_retry_short, old_retry_long;
2276                 u32 old_frag_threshold, old_rts_threshold;
2277                 u8 old_coverage_class;
2278
2279                 if (!rdev->ops->set_wiphy_params)
2280                         return -EOPNOTSUPP;
2281
2282                 old_retry_short = rdev->wiphy.retry_short;
2283                 old_retry_long = rdev->wiphy.retry_long;
2284                 old_frag_threshold = rdev->wiphy.frag_threshold;
2285                 old_rts_threshold = rdev->wiphy.rts_threshold;
2286                 old_coverage_class = rdev->wiphy.coverage_class;
2287
2288                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2289                         rdev->wiphy.retry_short = retry_short;
2290                 if (changed & WIPHY_PARAM_RETRY_LONG)
2291                         rdev->wiphy.retry_long = retry_long;
2292                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2293                         rdev->wiphy.frag_threshold = frag_threshold;
2294                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2295                         rdev->wiphy.rts_threshold = rts_threshold;
2296                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2297                         rdev->wiphy.coverage_class = coverage_class;
2298
2299                 result = rdev_set_wiphy_params(rdev, changed);
2300                 if (result) {
2301                         rdev->wiphy.retry_short = old_retry_short;
2302                         rdev->wiphy.retry_long = old_retry_long;
2303                         rdev->wiphy.frag_threshold = old_frag_threshold;
2304                         rdev->wiphy.rts_threshold = old_rts_threshold;
2305                         rdev->wiphy.coverage_class = old_coverage_class;
2306                 }
2307         }
2308         return 0;
2309 }
2310
2311 static inline u64 wdev_id(struct wireless_dev *wdev)
2312 {
2313         return (u64)wdev->identifier |
2314                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2315 }
2316
2317 static int nl80211_send_chandef(struct sk_buff *msg,
2318                                 const struct cfg80211_chan_def *chandef)
2319 {
2320         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2321                 return -EINVAL;
2322
2323         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2324                         chandef->chan->center_freq))
2325                 return -ENOBUFS;
2326         switch (chandef->width) {
2327         case NL80211_CHAN_WIDTH_20_NOHT:
2328         case NL80211_CHAN_WIDTH_20:
2329         case NL80211_CHAN_WIDTH_40:
2330                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2331                                 cfg80211_get_chandef_type(chandef)))
2332                         return -ENOBUFS;
2333                 break;
2334         default:
2335                 break;
2336         }
2337         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2338                 return -ENOBUFS;
2339         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2340                 return -ENOBUFS;
2341         if (chandef->center_freq2 &&
2342             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2343                 return -ENOBUFS;
2344         return 0;
2345 }
2346
2347 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2348                               struct cfg80211_registered_device *rdev,
2349                               struct wireless_dev *wdev, bool removal)
2350 {
2351         struct net_device *dev = wdev->netdev;
2352         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2353         void *hdr;
2354
2355         if (removal)
2356                 cmd = NL80211_CMD_DEL_INTERFACE;
2357
2358         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2359         if (!hdr)
2360                 return -1;
2361
2362         if (dev &&
2363             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2364              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2365                 goto nla_put_failure;
2366
2367         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2368             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2369             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2370             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2371             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2372                         rdev->devlist_generation ^
2373                         (cfg80211_rdev_list_generation << 2)))
2374                 goto nla_put_failure;
2375
2376         if (rdev->ops->get_channel) {
2377                 int ret;
2378                 struct cfg80211_chan_def chandef;
2379
2380                 ret = rdev_get_channel(rdev, wdev, &chandef);
2381                 if (ret == 0) {
2382                         if (nl80211_send_chandef(msg, &chandef))
2383                                 goto nla_put_failure;
2384                 }
2385         }
2386
2387         if (wdev->ssid_len) {
2388                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2389                         goto nla_put_failure;
2390         }
2391
2392         return genlmsg_end(msg, hdr);
2393
2394  nla_put_failure:
2395         genlmsg_cancel(msg, hdr);
2396         return -EMSGSIZE;
2397 }
2398
2399 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2400 {
2401         int wp_idx = 0;
2402         int if_idx = 0;
2403         int wp_start = cb->args[0];
2404         int if_start = cb->args[1];
2405         struct cfg80211_registered_device *rdev;
2406         struct wireless_dev *wdev;
2407
2408         rtnl_lock();
2409         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2410                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2411                         continue;
2412                 if (wp_idx < wp_start) {
2413                         wp_idx++;
2414                         continue;
2415                 }
2416                 if_idx = 0;
2417
2418                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2419                         if (if_idx < if_start) {
2420                                 if_idx++;
2421                                 continue;
2422                         }
2423                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2424                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2425                                                rdev, wdev, false) < 0) {
2426                                 goto out;
2427                         }
2428                         if_idx++;
2429                 }
2430
2431                 wp_idx++;
2432         }
2433  out:
2434         rtnl_unlock();
2435
2436         cb->args[0] = wp_idx;
2437         cb->args[1] = if_idx;
2438
2439         return skb->len;
2440 }
2441
2442 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2443 {
2444         struct sk_buff *msg;
2445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2446         struct wireless_dev *wdev = info->user_ptr[1];
2447
2448         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2449         if (!msg)
2450                 return -ENOMEM;
2451
2452         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2453                                rdev, wdev, false) < 0) {
2454                 nlmsg_free(msg);
2455                 return -ENOBUFS;
2456         }
2457
2458         return genlmsg_reply(msg, info);
2459 }
2460
2461 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2462         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2463         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2464         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2465         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2466         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2467         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2468 };
2469
2470 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2471 {
2472         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2473         int flag;
2474
2475         *mntrflags = 0;
2476
2477         if (!nla)
2478                 return -EINVAL;
2479
2480         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2481                              nla, mntr_flags_policy))
2482                 return -EINVAL;
2483
2484         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2485                 if (flags[flag])
2486                         *mntrflags |= (1<<flag);
2487
2488         return 0;
2489 }
2490
2491 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2492                                struct net_device *netdev, u8 use_4addr,
2493                                enum nl80211_iftype iftype)
2494 {
2495         if (!use_4addr) {
2496                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2497                         return -EBUSY;
2498                 return 0;
2499         }
2500
2501         switch (iftype) {
2502         case NL80211_IFTYPE_AP_VLAN:
2503                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2504                         return 0;
2505                 break;
2506         case NL80211_IFTYPE_STATION:
2507                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2508                         return 0;
2509                 break;
2510         default:
2511                 break;
2512         }
2513
2514         return -EOPNOTSUPP;
2515 }
2516
2517 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2518 {
2519         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2520         struct vif_params params;
2521         int err;
2522         enum nl80211_iftype otype, ntype;
2523         struct net_device *dev = info->user_ptr[1];
2524         u32 _flags, *flags = NULL;
2525         bool change = false;
2526
2527         memset(&params, 0, sizeof(params));
2528
2529         otype = ntype = dev->ieee80211_ptr->iftype;
2530
2531         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2532                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2533                 if (otype != ntype)
2534                         change = true;
2535                 if (ntype > NL80211_IFTYPE_MAX)
2536                         return -EINVAL;
2537         }
2538
2539         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2540                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2541
2542                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2543                         return -EINVAL;
2544                 if (netif_running(dev))
2545                         return -EBUSY;
2546
2547                 wdev_lock(wdev);
2548                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2549                              IEEE80211_MAX_MESH_ID_LEN);
2550                 wdev->mesh_id_up_len =
2551                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2552                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2553                        wdev->mesh_id_up_len);
2554                 wdev_unlock(wdev);
2555         }
2556
2557         if (info->attrs[NL80211_ATTR_4ADDR]) {
2558                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2559                 change = true;
2560                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2561                 if (err)
2562                         return err;
2563         } else {
2564                 params.use_4addr = -1;
2565         }
2566
2567         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2568                 if (ntype != NL80211_IFTYPE_MONITOR)
2569                         return -EINVAL;
2570                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2571                                           &_flags);
2572                 if (err)
2573                         return err;
2574
2575                 flags = &_flags;
2576                 change = true;
2577         }
2578
2579         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2580             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2581                 return -EOPNOTSUPP;
2582
2583         if (change)
2584                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2585         else
2586                 err = 0;
2587
2588         if (!err && params.use_4addr != -1)
2589                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2590
2591         return err;
2592 }
2593
2594 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2595 {
2596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2597         struct vif_params params;
2598         struct wireless_dev *wdev;
2599         struct sk_buff *msg, *event;
2600         int err;
2601         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2602         u32 flags;
2603
2604         /* to avoid failing a new interface creation due to pending removal */
2605         cfg80211_destroy_ifaces(rdev);
2606
2607         memset(&params, 0, sizeof(params));
2608
2609         if (!info->attrs[NL80211_ATTR_IFNAME])
2610                 return -EINVAL;
2611
2612         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2613                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2614                 if (type > NL80211_IFTYPE_MAX)
2615                         return -EINVAL;
2616         }
2617
2618         if (!rdev->ops->add_virtual_intf ||
2619             !(rdev->wiphy.interface_modes & (1 << type)))
2620                 return -EOPNOTSUPP;
2621
2622         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2623              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2624             info->attrs[NL80211_ATTR_MAC]) {
2625                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2626                            ETH_ALEN);
2627                 if (!is_valid_ether_addr(params.macaddr))
2628                         return -EADDRNOTAVAIL;
2629         }
2630
2631         if (info->attrs[NL80211_ATTR_4ADDR]) {
2632                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2633                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2634                 if (err)
2635                         return err;
2636         }
2637
2638         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2639         if (!msg)
2640                 return -ENOMEM;
2641
2642         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2643                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2644                                   &flags);
2645
2646         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2647             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2648                 return -EOPNOTSUPP;
2649
2650         wdev = rdev_add_virtual_intf(rdev,
2651                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2652                                 type, err ? NULL : &flags, &params);
2653         if (WARN_ON(!wdev)) {
2654                 nlmsg_free(msg);
2655                 return -EPROTO;
2656         } else if (IS_ERR(wdev)) {
2657                 nlmsg_free(msg);
2658                 return PTR_ERR(wdev);
2659         }
2660
2661         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2662                 wdev->owner_nlportid = info->snd_portid;
2663
2664         switch (type) {
2665         case NL80211_IFTYPE_MESH_POINT:
2666                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2667                         break;
2668                 wdev_lock(wdev);
2669                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2670                              IEEE80211_MAX_MESH_ID_LEN);
2671                 wdev->mesh_id_up_len =
2672                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2673                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2674                        wdev->mesh_id_up_len);
2675                 wdev_unlock(wdev);
2676                 break;
2677         case NL80211_IFTYPE_P2P_DEVICE:
2678                 /*
2679                  * P2P Device doesn't have a netdev, so doesn't go
2680                  * through the netdev notifier and must be added here
2681                  */
2682                 mutex_init(&wdev->mtx);
2683                 INIT_LIST_HEAD(&wdev->event_list);
2684                 spin_lock_init(&wdev->event_lock);
2685                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2686                 spin_lock_init(&wdev->mgmt_registrations_lock);
2687
2688                 wdev->identifier = ++rdev->wdev_id;
2689                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2690                 rdev->devlist_generation++;
2691                 break;
2692         default:
2693                 break;
2694         }
2695
2696         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2697                                rdev, wdev, false) < 0) {
2698                 nlmsg_free(msg);
2699                 return -ENOBUFS;
2700         }
2701
2702         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2703         if (event) {
2704                 if (nl80211_send_iface(event, 0, 0, 0,
2705                                        rdev, wdev, false) < 0) {
2706                         nlmsg_free(event);
2707                         goto out;
2708                 }
2709
2710                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2711                                         event, 0, NL80211_MCGRP_CONFIG,
2712                                         GFP_KERNEL);
2713         }
2714
2715 out:
2716         return genlmsg_reply(msg, info);
2717 }
2718
2719 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2720 {
2721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2722         struct wireless_dev *wdev = info->user_ptr[1];
2723         struct sk_buff *msg;
2724         int status;
2725
2726         if (!rdev->ops->del_virtual_intf)
2727                 return -EOPNOTSUPP;
2728
2729         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2730         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2731                 nlmsg_free(msg);
2732                 msg = NULL;
2733         }
2734
2735         /*
2736          * If we remove a wireless device without a netdev then clear
2737          * user_ptr[1] so that nl80211_post_doit won't dereference it
2738          * to check if it needs to do dev_put(). Otherwise it crashes
2739          * since the wdev has been freed, unlike with a netdev where
2740          * we need the dev_put() for the netdev to really be freed.
2741          */
2742         if (!wdev->netdev)
2743                 info->user_ptr[1] = NULL;
2744
2745         status = rdev_del_virtual_intf(rdev, wdev);
2746         if (status >= 0 && msg)
2747                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2748                                         msg, 0, NL80211_MCGRP_CONFIG,
2749                                         GFP_KERNEL);
2750         else
2751                 nlmsg_free(msg);
2752
2753         return status;
2754 }
2755
2756 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2757 {
2758         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2759         struct net_device *dev = info->user_ptr[1];
2760         u16 noack_map;
2761
2762         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2763                 return -EINVAL;
2764
2765         if (!rdev->ops->set_noack_map)
2766                 return -EOPNOTSUPP;
2767
2768         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2769
2770         return rdev_set_noack_map(rdev, dev, noack_map);
2771 }
2772
2773 struct get_key_cookie {
2774         struct sk_buff *msg;
2775         int error;
2776         int idx;
2777 };
2778
2779 static void get_key_callback(void *c, struct key_params *params)
2780 {
2781         struct nlattr *key;
2782         struct get_key_cookie *cookie = c;
2783
2784         if ((params->key &&
2785              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2786                      params->key_len, params->key)) ||
2787             (params->seq &&
2788              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2789                      params->seq_len, params->seq)) ||
2790             (params->cipher &&
2791              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2792                          params->cipher)))
2793                 goto nla_put_failure;
2794
2795         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2796         if (!key)
2797                 goto nla_put_failure;
2798
2799         if ((params->key &&
2800              nla_put(cookie->msg, NL80211_KEY_DATA,
2801                      params->key_len, params->key)) ||
2802             (params->seq &&
2803              nla_put(cookie->msg, NL80211_KEY_SEQ,
2804                      params->seq_len, params->seq)) ||
2805             (params->cipher &&
2806              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2807                          params->cipher)))
2808                 goto nla_put_failure;
2809
2810         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2811                 goto nla_put_failure;
2812
2813         nla_nest_end(cookie->msg, key);
2814
2815         return;
2816  nla_put_failure:
2817         cookie->error = 1;
2818 }
2819
2820 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2821 {
2822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2823         int err;
2824         struct net_device *dev = info->user_ptr[1];
2825         u8 key_idx = 0;
2826         const u8 *mac_addr = NULL;
2827         bool pairwise;
2828         struct get_key_cookie cookie = {
2829                 .error = 0,
2830         };
2831         void *hdr;
2832         struct sk_buff *msg;
2833
2834         if (info->attrs[NL80211_ATTR_KEY_IDX])
2835                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2836
2837         if (key_idx > 5)
2838                 return -EINVAL;
2839
2840         if (info->attrs[NL80211_ATTR_MAC])
2841                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2842
2843         pairwise = !!mac_addr;
2844         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2845                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2846                 if (kt >= NUM_NL80211_KEYTYPES)
2847                         return -EINVAL;
2848                 if (kt != NL80211_KEYTYPE_GROUP &&
2849                     kt != NL80211_KEYTYPE_PAIRWISE)
2850                         return -EINVAL;
2851                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2852         }
2853
2854         if (!rdev->ops->get_key)
2855                 return -EOPNOTSUPP;
2856
2857         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2858         if (!msg)
2859                 return -ENOMEM;
2860
2861         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2862                              NL80211_CMD_NEW_KEY);
2863         if (!hdr)
2864                 goto nla_put_failure;
2865
2866         cookie.msg = msg;
2867         cookie.idx = key_idx;
2868
2869         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2870             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2871                 goto nla_put_failure;
2872         if (mac_addr &&
2873             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2874                 goto nla_put_failure;
2875
2876         if (pairwise && mac_addr &&
2877             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2878                 return -ENOENT;
2879
2880         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2881                            get_key_callback);
2882
2883         if (err)
2884                 goto free_msg;
2885
2886         if (cookie.error)
2887                 goto nla_put_failure;
2888
2889         genlmsg_end(msg, hdr);
2890         return genlmsg_reply(msg, info);
2891
2892  nla_put_failure:
2893         err = -ENOBUFS;
2894  free_msg:
2895         nlmsg_free(msg);
2896         return err;
2897 }
2898
2899 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2900 {
2901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2902         struct key_parse key;
2903         int err;
2904         struct net_device *dev = info->user_ptr[1];
2905
2906         err = nl80211_parse_key(info, &key);
2907         if (err)
2908                 return err;
2909
2910         if (key.idx < 0)
2911                 return -EINVAL;
2912
2913         /* only support setting default key */
2914         if (!key.def && !key.defmgmt)
2915                 return -EINVAL;
2916
2917         wdev_lock(dev->ieee80211_ptr);
2918
2919         if (key.def) {
2920                 if (!rdev->ops->set_default_key) {
2921                         err = -EOPNOTSUPP;
2922                         goto out;
2923                 }
2924
2925                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2926                 if (err)
2927                         goto out;
2928
2929                 err = rdev_set_default_key(rdev, dev, key.idx,
2930                                                  key.def_uni, key.def_multi);
2931
2932                 if (err)
2933                         goto out;
2934
2935 #ifdef CONFIG_CFG80211_WEXT
2936                 dev->ieee80211_ptr->wext.default_key = key.idx;
2937 #endif
2938         } else {
2939                 if (key.def_uni || !key.def_multi) {
2940                         err = -EINVAL;
2941                         goto out;
2942                 }
2943
2944                 if (!rdev->ops->set_default_mgmt_key) {
2945                         err = -EOPNOTSUPP;
2946                         goto out;
2947                 }
2948
2949                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2950                 if (err)
2951                         goto out;
2952
2953                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2954                 if (err)
2955                         goto out;
2956
2957 #ifdef CONFIG_CFG80211_WEXT
2958                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2959 #endif
2960         }
2961
2962  out:
2963         wdev_unlock(dev->ieee80211_ptr);
2964
2965         return err;
2966 }
2967
2968 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2969 {
2970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2971         int err;
2972         struct net_device *dev = info->user_ptr[1];
2973         struct key_parse key;
2974         const u8 *mac_addr = NULL;
2975
2976         err = nl80211_parse_key(info, &key);
2977         if (err)
2978                 return err;
2979
2980         if (!key.p.key)
2981                 return -EINVAL;
2982
2983         if (info->attrs[NL80211_ATTR_MAC])
2984                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2985
2986         if (key.type == -1) {
2987                 if (mac_addr)
2988                         key.type = NL80211_KEYTYPE_PAIRWISE;
2989                 else
2990                         key.type = NL80211_KEYTYPE_GROUP;
2991         }
2992
2993         /* for now */
2994         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2995             key.type != NL80211_KEYTYPE_GROUP)
2996                 return -EINVAL;
2997
2998         if (!rdev->ops->add_key)
2999                 return -EOPNOTSUPP;
3000
3001         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3002                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3003                                            mac_addr))
3004                 return -EINVAL;
3005
3006         wdev_lock(dev->ieee80211_ptr);
3007         err = nl80211_key_allowed(dev->ieee80211_ptr);
3008         if (!err)
3009                 err = rdev_add_key(rdev, dev, key.idx,
3010                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3011                                     mac_addr, &key.p);
3012         wdev_unlock(dev->ieee80211_ptr);
3013
3014         return err;
3015 }
3016
3017 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3018 {
3019         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3020         int err;
3021         struct net_device *dev = info->user_ptr[1];
3022         u8 *mac_addr = NULL;
3023         struct key_parse key;
3024
3025         err = nl80211_parse_key(info, &key);
3026         if (err)
3027                 return err;
3028
3029         if (info->attrs[NL80211_ATTR_MAC])
3030                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3031
3032         if (key.type == -1) {
3033                 if (mac_addr)
3034                         key.type = NL80211_KEYTYPE_PAIRWISE;
3035                 else
3036                         key.type = NL80211_KEYTYPE_GROUP;
3037         }
3038
3039         /* for now */
3040         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3041             key.type != NL80211_KEYTYPE_GROUP)
3042                 return -EINVAL;
3043
3044         if (!rdev->ops->del_key)
3045                 return -EOPNOTSUPP;
3046
3047         wdev_lock(dev->ieee80211_ptr);
3048         err = nl80211_key_allowed(dev->ieee80211_ptr);
3049
3050         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
3051             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3052                 err = -ENOENT;
3053
3054         if (!err)
3055                 err = rdev_del_key(rdev, dev, key.idx,
3056                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3057                                    mac_addr);
3058
3059 #ifdef CONFIG_CFG80211_WEXT
3060         if (!err) {
3061                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3062                         dev->ieee80211_ptr->wext.default_key = -1;
3063                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3064                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3065         }
3066 #endif
3067         wdev_unlock(dev->ieee80211_ptr);
3068
3069         return err;
3070 }
3071
3072 /* This function returns an error or the number of nested attributes */
3073 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3074 {
3075         struct nlattr *attr;
3076         int n_entries = 0, tmp;
3077
3078         nla_for_each_nested(attr, nl_attr, tmp) {
3079                 if (nla_len(attr) != ETH_ALEN)
3080                         return -EINVAL;
3081
3082                 n_entries++;
3083         }
3084
3085         return n_entries;
3086 }
3087
3088 /*
3089  * This function parses ACL information and allocates memory for ACL data.
3090  * On successful return, the calling function is responsible to free the
3091  * ACL buffer returned by this function.
3092  */
3093 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3094                                                 struct genl_info *info)
3095 {
3096         enum nl80211_acl_policy acl_policy;
3097         struct nlattr *attr;
3098         struct cfg80211_acl_data *acl;
3099         int i = 0, n_entries, tmp;
3100
3101         if (!wiphy->max_acl_mac_addrs)
3102                 return ERR_PTR(-EOPNOTSUPP);
3103
3104         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3105                 return ERR_PTR(-EINVAL);
3106
3107         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3108         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3109             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3110                 return ERR_PTR(-EINVAL);
3111
3112         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3113                 return ERR_PTR(-EINVAL);
3114
3115         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3116         if (n_entries < 0)
3117                 return ERR_PTR(n_entries);
3118
3119         if (n_entries > wiphy->max_acl_mac_addrs)
3120                 return ERR_PTR(-ENOTSUPP);
3121
3122         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3123                       GFP_KERNEL);
3124         if (!acl)
3125                 return ERR_PTR(-ENOMEM);
3126
3127         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3128                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3129                 i++;
3130         }
3131
3132         acl->n_acl_entries = n_entries;
3133         acl->acl_policy = acl_policy;
3134
3135         return acl;
3136 }
3137
3138 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3139 {
3140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3141         struct net_device *dev = info->user_ptr[1];
3142         struct cfg80211_acl_data *acl;
3143         int err;
3144
3145         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3146             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3147                 return -EOPNOTSUPP;
3148
3149         if (!dev->ieee80211_ptr->beacon_interval)
3150                 return -EINVAL;
3151
3152         acl = parse_acl_data(&rdev->wiphy, info);
3153         if (IS_ERR(acl))
3154                 return PTR_ERR(acl);
3155
3156         err = rdev_set_mac_acl(rdev, dev, acl);
3157
3158         kfree(acl);
3159
3160         return err;
3161 }
3162
3163 static int nl80211_parse_beacon(struct nlattr *attrs[],
3164                                 struct cfg80211_beacon_data *bcn)
3165 {
3166         bool haveinfo = false;
3167
3168         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3169             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3170             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3171             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3172                 return -EINVAL;
3173
3174         memset(bcn, 0, sizeof(*bcn));
3175
3176         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3177                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3178                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3179                 if (!bcn->head_len)
3180                         return -EINVAL;
3181                 haveinfo = true;
3182         }
3183
3184         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3185                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3186                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3187                 haveinfo = true;
3188         }
3189
3190         if (!haveinfo)
3191                 return -EINVAL;
3192
3193         if (attrs[NL80211_ATTR_IE]) {
3194                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3195                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3196         }
3197
3198         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3199                 bcn->proberesp_ies =
3200                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3201                 bcn->proberesp_ies_len =
3202                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3203         }
3204
3205         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3206                 bcn->assocresp_ies =
3207                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3208                 bcn->assocresp_ies_len =
3209                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3210         }
3211
3212         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3213                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3214                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3215         }
3216
3217         return 0;
3218 }
3219
3220 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3221                                    struct cfg80211_ap_settings *params)
3222 {
3223         struct wireless_dev *wdev;
3224         bool ret = false;
3225
3226         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3227                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3228                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3229                         continue;
3230
3231                 if (!wdev->preset_chandef.chan)
3232                         continue;
3233
3234                 params->chandef = wdev->preset_chandef;
3235                 ret = true;
3236                 break;
3237         }
3238
3239         return ret;
3240 }
3241
3242 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3243                                     enum nl80211_auth_type auth_type,
3244                                     enum nl80211_commands cmd)
3245 {
3246         if (auth_type > NL80211_AUTHTYPE_MAX)
3247                 return false;
3248
3249         switch (cmd) {
3250         case NL80211_CMD_AUTHENTICATE:
3251                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3252                     auth_type == NL80211_AUTHTYPE_SAE)
3253                         return false;
3254                 return true;
3255         case NL80211_CMD_CONNECT:
3256         case NL80211_CMD_START_AP:
3257                 /* SAE not supported yet */
3258                 if (auth_type == NL80211_AUTHTYPE_SAE)
3259                         return false;
3260                 return true;
3261         default:
3262                 return false;
3263         }
3264 }
3265
3266 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3267 {
3268         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3269         struct net_device *dev = info->user_ptr[1];
3270         struct wireless_dev *wdev = dev->ieee80211_ptr;
3271         struct cfg80211_ap_settings params;
3272         int err;
3273
3274         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3275             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3276                 return -EOPNOTSUPP;
3277
3278         if (!rdev->ops->start_ap)
3279                 return -EOPNOTSUPP;
3280
3281         if (wdev->beacon_interval)
3282                 return -EALREADY;
3283
3284         memset(&params, 0, sizeof(params));
3285
3286         /* these are required for START_AP */
3287         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3288             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3289             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3290                 return -EINVAL;
3291
3292         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3293         if (err)
3294                 return err;
3295
3296         params.beacon_interval =
3297                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3298         params.dtim_period =
3299                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3300
3301         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3302         if (err)
3303                 return err;
3304
3305         /*
3306          * In theory, some of these attributes should be required here
3307          * but since they were not used when the command was originally
3308          * added, keep them optional for old user space programs to let
3309          * them continue to work with drivers that do not need the
3310          * additional information -- drivers must check!
3311          */
3312         if (info->attrs[NL80211_ATTR_SSID]) {
3313                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3314                 params.ssid_len =
3315                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3316                 if (params.ssid_len == 0 ||
3317                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3318                         return -EINVAL;
3319         }
3320
3321         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3322                 params.hidden_ssid = nla_get_u32(
3323                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3324                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3325                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3326                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3327                         return -EINVAL;
3328         }
3329
3330         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3331
3332         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3333                 params.auth_type = nla_get_u32(
3334                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3335                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3336                                              NL80211_CMD_START_AP))
3337                         return -EINVAL;
3338         } else
3339                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3340
3341         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3342                                       NL80211_MAX_NR_CIPHER_SUITES);
3343         if (err)
3344                 return err;
3345
3346         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3347                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3348                         return -EOPNOTSUPP;
3349                 params.inactivity_timeout = nla_get_u16(
3350                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3351         }
3352
3353         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3354                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3355                         return -EINVAL;
3356                 params.p2p_ctwindow =
3357                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3358                 if (params.p2p_ctwindow > 127)
3359                         return -EINVAL;
3360                 if (params.p2p_ctwindow != 0 &&
3361                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3362                         return -EINVAL;
3363         }
3364
3365         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3366                 u8 tmp;
3367
3368                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3369                         return -EINVAL;
3370                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3371                 if (tmp > 1)
3372                         return -EINVAL;
3373                 params.p2p_opp_ps = tmp;
3374                 if (params.p2p_opp_ps != 0 &&
3375                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3376                         return -EINVAL;
3377         }
3378
3379         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3380                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3381                 if (err)
3382                         return err;
3383         } else if (wdev->preset_chandef.chan) {
3384                 params.chandef = wdev->preset_chandef;
3385         } else if (!nl80211_get_ap_channel(rdev, &params))
3386                 return -EINVAL;
3387
3388         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
3389                                      wdev->iftype))
3390                 return -EINVAL;
3391
3392         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3393                 params.acl = parse_acl_data(&rdev->wiphy, info);
3394                 if (IS_ERR(params.acl))
3395                         return PTR_ERR(params.acl);
3396         }
3397
3398         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3399                 params.smps_mode =
3400                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3401                 switch (params.smps_mode) {
3402                 case NL80211_SMPS_OFF:
3403                         break;
3404                 case NL80211_SMPS_STATIC:
3405                         if (!(rdev->wiphy.features &
3406                               NL80211_FEATURE_STATIC_SMPS))
3407                                 return -EINVAL;
3408                         break;
3409                 case NL80211_SMPS_DYNAMIC:
3410                         if (!(rdev->wiphy.features &
3411                               NL80211_FEATURE_DYNAMIC_SMPS))
3412                                 return -EINVAL;
3413                         break;
3414                 default:
3415                         return -EINVAL;
3416                 }
3417         } else {
3418                 params.smps_mode = NL80211_SMPS_OFF;
3419         }
3420
3421         wdev_lock(wdev);
3422         err = rdev_start_ap(rdev, dev, &params);
3423         if (!err) {
3424                 wdev->preset_chandef = params.chandef;
3425                 wdev->beacon_interval = params.beacon_interval;
3426                 wdev->chandef = params.chandef;
3427                 wdev->ssid_len = params.ssid_len;
3428                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3429         }
3430         wdev_unlock(wdev);
3431
3432         kfree(params.acl);
3433
3434         return err;
3435 }
3436
3437 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3438 {
3439         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3440         struct net_device *dev = info->user_ptr[1];
3441         struct wireless_dev *wdev = dev->ieee80211_ptr;
3442         struct cfg80211_beacon_data params;
3443         int err;
3444
3445         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3446             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3447                 return -EOPNOTSUPP;
3448
3449         if (!rdev->ops->change_beacon)
3450                 return -EOPNOTSUPP;
3451
3452         if (!wdev->beacon_interval)
3453                 return -EINVAL;
3454
3455         err = nl80211_parse_beacon(info->attrs, &params);
3456         if (err)
3457                 return err;
3458
3459         wdev_lock(wdev);
3460         err = rdev_change_beacon(rdev, dev, &params);
3461         wdev_unlock(wdev);
3462
3463         return err;
3464 }
3465
3466 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3467 {
3468         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3469         struct net_device *dev = info->user_ptr[1];
3470
3471         return cfg80211_stop_ap(rdev, dev, false);
3472 }
3473
3474 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3475         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3476         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3477         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3478         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3479         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3480         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3481 };
3482
3483 static int parse_station_flags(struct genl_info *info,
3484                                enum nl80211_iftype iftype,
3485                                struct station_parameters *params)
3486 {
3487         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3488         struct nlattr *nla;
3489         int flag;
3490
3491         /*
3492          * Try parsing the new attribute first so userspace
3493          * can specify both for older kernels.
3494          */
3495         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3496         if (nla) {
3497                 struct nl80211_sta_flag_update *sta_flags;
3498
3499                 sta_flags = nla_data(nla);
3500                 params->sta_flags_mask = sta_flags->mask;
3501                 params->sta_flags_set = sta_flags->set;
3502                 params->sta_flags_set &= params->sta_flags_mask;
3503                 if ((params->sta_flags_mask |
3504                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3505                         return -EINVAL;
3506                 return 0;
3507         }
3508
3509         /* if present, parse the old attribute */
3510
3511         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3512         if (!nla)
3513                 return 0;
3514
3515         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3516                              nla, sta_flags_policy))
3517                 return -EINVAL;
3518
3519         /*
3520          * Only allow certain flags for interface types so that
3521          * other attributes are silently ignored. Remember that
3522          * this is backward compatibility code with old userspace
3523          * and shouldn't be hit in other cases anyway.
3524          */
3525         switch (iftype) {
3526         case NL80211_IFTYPE_AP:
3527         case NL80211_IFTYPE_AP_VLAN:
3528         case NL80211_IFTYPE_P2P_GO:
3529                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3530                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3531                                          BIT(NL80211_STA_FLAG_WME) |
3532                                          BIT(NL80211_STA_FLAG_MFP);
3533                 break;
3534         case NL80211_IFTYPE_P2P_CLIENT:
3535         case NL80211_IFTYPE_STATION:
3536                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3537                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3538                 break;
3539         case NL80211_IFTYPE_MESH_POINT:
3540                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3541                                          BIT(NL80211_STA_FLAG_MFP) |
3542                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3543         default:
3544                 return -EINVAL;
3545         }
3546
3547         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3548                 if (flags[flag]) {
3549                         params->sta_flags_set |= (1<<flag);
3550
3551                         /* no longer support new API additions in old API */
3552                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3553                                 return -EINVAL;
3554                 }
3555         }
3556
3557         return 0;
3558 }
3559
3560 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3561                                  int attr)
3562 {
3563         struct nlattr *rate;
3564         u32 bitrate;
3565         u16 bitrate_compat;
3566
3567         rate = nla_nest_start(msg, attr);
3568         if (!rate)
3569                 return false;
3570
3571         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3572         bitrate = cfg80211_calculate_bitrate(info);
3573         /* report 16-bit bitrate only if we can */
3574         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3575         if (bitrate > 0 &&
3576             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3577                 return false;
3578         if (bitrate_compat > 0 &&
3579             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3580                 return false;
3581
3582         if (info->flags & RATE_INFO_FLAGS_MCS) {
3583                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3584                         return false;
3585                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3586                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3587                         return false;
3588                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3589                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3590                         return false;
3591         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3592                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3593                         return false;
3594                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3595                         return false;
3596                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3597                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3598                         return false;
3599                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3600                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3601                         return false;
3602                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3603                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3604                         return false;
3605                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3606                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3607                         return false;
3608                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3609                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3610                         return false;
3611         }
3612
3613         nla_nest_end(msg, rate);
3614         return true;
3615 }
3616
3617 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3618                                int id)
3619 {
3620         void *attr;
3621         int i = 0;
3622
3623         if (!mask)
3624                 return true;
3625
3626         attr = nla_nest_start(msg, id);
3627         if (!attr)
3628                 return false;
3629
3630         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3631                 if (!(mask & BIT(i)))
3632                         continue;
3633
3634                 if (nla_put_u8(msg, i, signal[i]))
3635                         return false;
3636         }
3637
3638         nla_nest_end(msg, attr);
3639
3640         return true;
3641 }
3642
3643 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3644                                 int flags,
3645                                 struct cfg80211_registered_device *rdev,
3646                                 struct net_device *dev,
3647                                 const u8 *mac_addr, struct station_info *sinfo)
3648 {
3649         void *hdr;
3650         struct nlattr *sinfoattr, *bss_param;
3651
3652         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3653         if (!hdr)
3654                 return -1;
3655
3656         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3657             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3658             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3659                 goto nla_put_failure;
3660
3661         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3662         if (!sinfoattr)
3663                 goto nla_put_failure;
3664         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3665             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3666                         sinfo->connected_time))
3667                 goto nla_put_failure;
3668         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3669             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3670                         sinfo->inactive_time))
3671                 goto nla_put_failure;
3672         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3673                               STATION_INFO_RX_BYTES64)) &&
3674             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3675                         (u32)sinfo->rx_bytes))
3676                 goto nla_put_failure;
3677         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3678                               STATION_INFO_TX_BYTES64)) &&
3679             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3680                         (u32)sinfo->tx_bytes))
3681                 goto nla_put_failure;
3682         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3683             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3684                         sinfo->rx_bytes))
3685                 goto nla_put_failure;
3686         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3687             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3688                         sinfo->tx_bytes))
3689                 goto nla_put_failure;
3690         if ((sinfo->filled & STATION_INFO_LLID) &&
3691             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3692                 goto nla_put_failure;
3693         if ((sinfo->filled & STATION_INFO_PLID) &&
3694             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3695                 goto nla_put_failure;
3696         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3697             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3698                        sinfo->plink_state))
3699                 goto nla_put_failure;
3700         switch (rdev->wiphy.signal_type) {
3701         case CFG80211_SIGNAL_TYPE_MBM:
3702                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3703                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3704                                sinfo->signal))
3705                         goto nla_put_failure;
3706                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3707                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3708                                sinfo->signal_avg))
3709                         goto nla_put_failure;
3710                 break;
3711         default:
3712                 break;
3713         }
3714         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3715                 if (!nl80211_put_signal(msg, sinfo->chains,
3716                                         sinfo->chain_signal,
3717                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3718                         goto nla_put_failure;
3719         }
3720         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3721                 if (!nl80211_put_signal(msg, sinfo->chains,
3722                                         sinfo->chain_signal_avg,
3723                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3724                         goto nla_put_failure;
3725         }
3726         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3727                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3728                                           NL80211_STA_INFO_TX_BITRATE))
3729                         goto nla_put_failure;
3730         }
3731         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3732                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3733                                           NL80211_STA_INFO_RX_BITRATE))
3734                         goto nla_put_failure;
3735         }
3736         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3737             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3738                         sinfo->rx_packets))
3739                 goto nla_put_failure;
3740         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3741             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3742                         sinfo->tx_packets))
3743                 goto nla_put_failure;
3744         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3745             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3746                         sinfo->tx_retries))
3747                 goto nla_put_failure;
3748         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3749             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3750                         sinfo->tx_failed))
3751                 goto nla_put_failure;
3752         if ((sinfo->filled & STATION_INFO_EXPECTED_THROUGHPUT) &&
3753             nla_put_u32(msg, NL80211_STA_INFO_EXPECTED_THROUGHPUT,
3754                         sinfo->expected_throughput))
3755                 goto nla_put_failure;
3756         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3757             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3758                         sinfo->beacon_loss_count))
3759                 goto nla_put_failure;
3760         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3761             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3762                         sinfo->local_pm))
3763                 goto nla_put_failure;
3764         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3765             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3766                         sinfo->peer_pm))
3767                 goto nla_put_failure;
3768         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3769             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3770                         sinfo->nonpeer_pm))
3771                 goto nla_put_failure;
3772         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3773                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3774                 if (!bss_param)
3775                         goto nla_put_failure;
3776
3777                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3778                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3779                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3780                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3781                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3782                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3783                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3784                                sinfo->bss_param.dtim_period) ||
3785                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3786                                 sinfo->bss_param.beacon_interval))
3787                         goto nla_put_failure;
3788
3789                 nla_nest_end(msg, bss_param);
3790         }
3791         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3792             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3793                     sizeof(struct nl80211_sta_flag_update),
3794                     &sinfo->sta_flags))
3795                 goto nla_put_failure;
3796         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3797                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3798                             sinfo->t_offset))
3799                 goto nla_put_failure;
3800         nla_nest_end(msg, sinfoattr);
3801
3802         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3803             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3804                     sinfo->assoc_req_ies))
3805                 goto nla_put_failure;
3806
3807         return genlmsg_end(msg, hdr);
3808
3809  nla_put_failure:
3810         genlmsg_cancel(msg, hdr);
3811         return -EMSGSIZE;
3812 }
3813
3814 static int nl80211_dump_station(struct sk_buff *skb,
3815                                 struct netlink_callback *cb)
3816 {
3817         struct station_info sinfo;
3818         struct cfg80211_registered_device *rdev;
3819         struct wireless_dev *wdev;
3820         u8 mac_addr[ETH_ALEN];
3821         int sta_idx = cb->args[2];
3822         int err;
3823
3824         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3825         if (err)
3826                 return err;
3827
3828         if (!wdev->netdev) {
3829                 err = -EINVAL;
3830                 goto out_err;
3831         }
3832
3833         if (!rdev->ops->dump_station) {
3834                 err = -EOPNOTSUPP;
3835                 goto out_err;
3836         }
3837
3838         while (1) {
3839                 memset(&sinfo, 0, sizeof(sinfo));
3840                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3841                                         mac_addr, &sinfo);
3842                 if (err == -ENOENT)
3843                         break;
3844                 if (err)
3845                         goto out_err;
3846
3847                 if (nl80211_send_station(skb,
3848                                 NETLINK_CB(cb->skb).portid,
3849                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3850                                 rdev, wdev->netdev, mac_addr,
3851                                 &sinfo) < 0)
3852                         goto out;
3853
3854                 sta_idx++;
3855         }
3856
3857
3858  out:
3859         cb->args[2] = sta_idx;
3860         err = skb->len;
3861  out_err:
3862         nl80211_finish_wdev_dump(rdev);
3863
3864         return err;
3865 }
3866
3867 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3868 {
3869         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3870         struct net_device *dev = info->user_ptr[1];
3871         struct station_info sinfo;
3872         struct sk_buff *msg;
3873         u8 *mac_addr = NULL;
3874         int err;
3875
3876         memset(&sinfo, 0, sizeof(sinfo));
3877
3878         if (!info->attrs[NL80211_ATTR_MAC])
3879                 return -EINVAL;
3880
3881         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3882
3883         if (!rdev->ops->get_station)
3884                 return -EOPNOTSUPP;
3885
3886         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3887         if (err)
3888                 return err;
3889
3890         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3891         if (!msg)
3892                 return -ENOMEM;
3893
3894         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3895                                  rdev, dev, mac_addr, &sinfo) < 0) {
3896                 nlmsg_free(msg);
3897                 return -ENOBUFS;
3898         }
3899
3900         return genlmsg_reply(msg, info);
3901 }
3902
3903 int cfg80211_check_station_change(struct wiphy *wiphy,
3904                                   struct station_parameters *params,
3905                                   enum cfg80211_station_type statype)
3906 {
3907         if (params->listen_interval != -1)
3908                 return -EINVAL;
3909         if (params->aid &&
3910             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3911                 return -EINVAL;
3912
3913         /* When you run into this, adjust the code below for the new flag */
3914         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3915
3916         switch (statype) {
3917         case CFG80211_STA_MESH_PEER_KERNEL:
3918         case CFG80211_STA_MESH_PEER_USER:
3919                 /*
3920                  * No ignoring the TDLS flag here -- the userspace mesh
3921                  * code doesn't have the bug of including TDLS in the
3922                  * mask everywhere.
3923                  */
3924                 if (params->sta_flags_mask &
3925                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3926                                   BIT(NL80211_STA_FLAG_MFP) |
3927                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3928                         return -EINVAL;
3929                 break;
3930         case CFG80211_STA_TDLS_PEER_SETUP:
3931         case CFG80211_STA_TDLS_PEER_ACTIVE:
3932                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3933                         return -EINVAL;
3934                 /* ignore since it can't change */
3935                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3936                 break;
3937         default:
3938                 /* disallow mesh-specific things */
3939                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3940                         return -EINVAL;
3941                 if (params->local_pm)
3942                         return -EINVAL;
3943                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3944                         return -EINVAL;
3945         }
3946
3947         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3948             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3949                 /* TDLS can't be set, ... */
3950                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3951                         return -EINVAL;
3952                 /*
3953                  * ... but don't bother the driver with it. This works around
3954                  * a hostapd/wpa_supplicant issue -- it always includes the
3955                  * TLDS_PEER flag in the mask even for AP mode.
3956                  */
3957                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3958         }
3959
3960         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3961                 /* reject other things that can't change */
3962                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3963                         return -EINVAL;
3964                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3965                         return -EINVAL;
3966                 if (params->supported_rates)
3967                         return -EINVAL;
3968                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3969                         return -EINVAL;
3970         }
3971
3972         if (statype != CFG80211_STA_AP_CLIENT) {
3973                 if (params->vlan)
3974                         return -EINVAL;
3975         }
3976
3977         switch (statype) {
3978         case CFG80211_STA_AP_MLME_CLIENT:
3979                 /* Use this only for authorizing/unauthorizing a station */
3980                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3981                         return -EOPNOTSUPP;
3982                 break;
3983         case CFG80211_STA_AP_CLIENT:
3984                 /* accept only the listed bits */
3985                 if (params->sta_flags_mask &
3986                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3987                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3988                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3989                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3990                                   BIT(NL80211_STA_FLAG_WME) |
3991                                   BIT(NL80211_STA_FLAG_MFP)))
3992                         return -EINVAL;
3993
3994                 /* but authenticated/associated only if driver handles it */
3995                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3996                     params->sta_flags_mask &
3997                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3998                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3999                         return -EINVAL;
4000                 break;
4001         case CFG80211_STA_IBSS:
4002         case CFG80211_STA_AP_STA:
4003                 /* reject any changes other than AUTHORIZED */
4004                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4005                         return -EINVAL;
4006                 break;
4007         case CFG80211_STA_TDLS_PEER_SETUP:
4008                 /* reject any changes other than AUTHORIZED or WME */
4009                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4010                                                BIT(NL80211_STA_FLAG_WME)))
4011                         return -EINVAL;
4012                 /* force (at least) rates when authorizing */
4013                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4014                     !params->supported_rates)
4015                         return -EINVAL;
4016                 break;
4017         case CFG80211_STA_TDLS_PEER_ACTIVE:
4018                 /* reject any changes */
4019                 return -EINVAL;
4020         case CFG80211_STA_MESH_PEER_KERNEL:
4021                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4022                         return -EINVAL;
4023                 break;
4024         case CFG80211_STA_MESH_PEER_USER:
4025                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4026                         return -EINVAL;
4027                 break;
4028         }
4029
4030         return 0;
4031 }
4032 EXPORT_SYMBOL(cfg80211_check_station_change);
4033
4034 /*
4035  * Get vlan interface making sure it is running and on the right wiphy.
4036  */
4037 static struct net_device *get_vlan(struct genl_info *info,
4038                                    struct cfg80211_registered_device *rdev)
4039 {
4040         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4041         struct net_device *v;
4042         int ret;
4043
4044         if (!vlanattr)
4045                 return NULL;
4046
4047         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4048         if (!v)
4049                 return ERR_PTR(-ENODEV);
4050
4051         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4052                 ret = -EINVAL;
4053                 goto error;
4054         }
4055
4056         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4057             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4058             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4059                 ret = -EINVAL;
4060                 goto error;
4061         }
4062
4063         if (!netif_running(v)) {
4064                 ret = -ENETDOWN;
4065                 goto error;
4066         }
4067
4068         return v;
4069  error:
4070         dev_put(v);
4071         return ERR_PTR(ret);
4072 }
4073
4074 static const struct nla_policy
4075 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4076         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4077         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4078 };
4079
4080 static int nl80211_parse_sta_wme(struct genl_info *info,
4081                                  struct station_parameters *params)
4082 {
4083         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4084         struct nlattr *nla;
4085         int err;
4086
4087         /* parse WME attributes if present */
4088         if (!info->attrs[NL80211_ATTR_STA_WME])
4089                 return 0;
4090
4091         nla = info->attrs[NL80211_ATTR_STA_WME];
4092         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4093                                nl80211_sta_wme_policy);
4094         if (err)
4095                 return err;
4096
4097         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4098                 params->uapsd_queues = nla_get_u8(
4099                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4100         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4101                 return -EINVAL;
4102
4103         if (tb[NL80211_STA_WME_MAX_SP])
4104                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4105
4106         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4107                 return -EINVAL;
4108
4109         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4110
4111         return 0;
4112 }
4113
4114 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4115                                       struct station_parameters *params)
4116 {
4117         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4118                 params->supported_channels =
4119                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4120                 params->supported_channels_len =
4121                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4122                 /*
4123                  * Need to include at least one (first channel, number of
4124                  * channels) tuple for each subband, and must have proper
4125                  * tuples for the rest of the data as well.
4126                  */
4127                 if (params->supported_channels_len < 2)
4128                         return -EINVAL;
4129                 if (params->supported_channels_len % 2)
4130                         return -EINVAL;
4131         }
4132
4133         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4134                 params->supported_oper_classes =
4135                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4136                 params->supported_oper_classes_len =
4137                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4138                 /*
4139                  * The value of the Length field of the Supported Operating
4140                  * Classes element is between 2 and 253.
4141                  */
4142                 if (params->supported_oper_classes_len < 2 ||
4143                     params->supported_oper_classes_len > 253)
4144                         return -EINVAL;
4145         }
4146         return 0;
4147 }
4148
4149 static int nl80211_set_station_tdls(struct genl_info *info,
4150                                     struct station_parameters *params)
4151 {
4152         int err;
4153         /* Dummy STA entry gets updated once the peer capabilities are known */
4154         if (info->attrs[NL80211_ATTR_PEER_AID])
4155                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4156         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4157                 params->ht_capa =
4158                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4159         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4160                 params->vht_capa =
4161                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4162
4163         err = nl80211_parse_sta_channel_info(info, params);
4164         if (err)
4165                 return err;
4166
4167         return nl80211_parse_sta_wme(info, params);
4168 }
4169
4170 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4171 {
4172         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4173         struct net_device *dev = info->user_ptr[1];
4174         struct station_parameters params;
4175         u8 *mac_addr;
4176         int err;
4177
4178         memset(&params, 0, sizeof(params));
4179
4180         params.listen_interval = -1;
4181
4182         if (!rdev->ops->change_station)
4183                 return -EOPNOTSUPP;
4184
4185         if (info->attrs[NL80211_ATTR_STA_AID])
4186                 return -EINVAL;
4187
4188         if (!info->attrs[NL80211_ATTR_MAC])
4189                 return -EINVAL;
4190
4191         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4192
4193         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4194                 params.supported_rates =
4195                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4196                 params.supported_rates_len =
4197                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4198         }
4199
4200         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4201                 params.capability =
4202                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4203                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4204         }
4205
4206         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4207                 params.ext_capab =
4208                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4209                 params.ext_capab_len =
4210                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4211         }
4212
4213         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4214                 return -EINVAL;
4215
4216         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4217                 return -EINVAL;
4218
4219         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4220                 params.plink_action =
4221                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4222                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4223                         return -EINVAL;
4224         }
4225
4226         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4227                 params.plink_state =
4228                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4229                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4230                         return -EINVAL;
4231                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4232         }
4233
4234         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4235                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4236                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4237
4238                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4239                     pm > NL80211_MESH_POWER_MAX)
4240                         return -EINVAL;
4241
4242                 params.local_pm = pm;
4243         }
4244
4245         /* Include parameters for TDLS peer (will check later) */
4246         err = nl80211_set_station_tdls(info, &params);
4247         if (err)
4248                 return err;
4249
4250         params.vlan = get_vlan(info, rdev);
4251         if (IS_ERR(params.vlan))
4252                 return PTR_ERR(params.vlan);
4253
4254         switch (dev->ieee80211_ptr->iftype) {
4255         case NL80211_IFTYPE_AP:
4256         case NL80211_IFTYPE_AP_VLAN:
4257         case NL80211_IFTYPE_P2P_GO:
4258         case NL80211_IFTYPE_P2P_CLIENT:
4259         case NL80211_IFTYPE_STATION:
4260         case NL80211_IFTYPE_ADHOC:
4261         case NL80211_IFTYPE_MESH_POINT:
4262                 break;
4263         default:
4264                 err = -EOPNOTSUPP;
4265                 goto out_put_vlan;
4266         }
4267
4268         /* driver will call cfg80211_check_station_change() */
4269         err = rdev_change_station(rdev, dev, mac_addr, &params);
4270
4271  out_put_vlan:
4272         if (params.vlan)
4273                 dev_put(params.vlan);
4274
4275         return err;
4276 }
4277
4278 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4279 {
4280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4281         int err;
4282         struct net_device *dev = info->user_ptr[1];
4283         struct station_parameters params;
4284         u8 *mac_addr = NULL;
4285
4286         memset(&params, 0, sizeof(params));
4287
4288         if (!rdev->ops->add_station)
4289                 return -EOPNOTSUPP;
4290
4291         if (!info->attrs[NL80211_ATTR_MAC])
4292                 return -EINVAL;
4293
4294         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4295                 return -EINVAL;
4296
4297         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4298                 return -EINVAL;
4299
4300         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4301             !info->attrs[NL80211_ATTR_PEER_AID])
4302                 return -EINVAL;
4303
4304         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4305         params.supported_rates =
4306                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4307         params.supported_rates_len =
4308                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4309         params.listen_interval =
4310                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4311
4312         if (info->attrs[NL80211_ATTR_PEER_AID])
4313                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4314         else
4315                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4316         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4317                 return -EINVAL;
4318
4319         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4320                 params.capability =
4321                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4322                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4323         }
4324
4325         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4326                 params.ext_capab =
4327                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4328                 params.ext_capab_len =
4329                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4330         }
4331
4332         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4333                 params.ht_capa =
4334                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4335
4336         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4337                 params.vht_capa =
4338                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4339
4340         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4341                 params.opmode_notif_used = true;
4342                 params.opmode_notif =
4343                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4344         }
4345
4346         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4347                 params.plink_action =
4348                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4349                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4350                         return -EINVAL;
4351         }
4352
4353         err = nl80211_parse_sta_channel_info(info, &params);
4354         if (err)
4355                 return err;
4356
4357         err = nl80211_parse_sta_wme(info, &params);
4358         if (err)
4359                 return err;
4360
4361         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4362                 return -EINVAL;
4363
4364         /* When you run into this, adjust the code below for the new flag */
4365         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4366
4367         switch (dev->ieee80211_ptr->iftype) {
4368         case NL80211_IFTYPE_AP:
4369         case NL80211_IFTYPE_AP_VLAN:
4370         case NL80211_IFTYPE_P2P_GO:
4371                 /* ignore WME attributes if iface/sta is not capable */
4372                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4373                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4374                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4375
4376                 /* TDLS peers cannot be added */
4377                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4378                     info->attrs[NL80211_ATTR_PEER_AID])
4379                         return -EINVAL;
4380                 /* but don't bother the driver with it */
4381                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4382
4383                 /* allow authenticated/associated only if driver handles it */
4384                 if (!(rdev->wiphy.features &
4385                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4386                     params.sta_flags_mask &
4387                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4388                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4389                         return -EINVAL;
4390
4391                 /* must be last in here for error handling */
4392                 params.vlan = get_vlan(info, rdev);
4393                 if (IS_ERR(params.vlan))
4394                         return PTR_ERR(params.vlan);
4395                 break;
4396         case NL80211_IFTYPE_MESH_POINT:
4397                 /* ignore uAPSD data */
4398                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4399
4400                 /* associated is disallowed */
4401                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4402                         return -EINVAL;
4403                 /* TDLS peers cannot be added */
4404                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4405                     info->attrs[NL80211_ATTR_PEER_AID])
4406                         return -EINVAL;
4407                 break;
4408         case NL80211_IFTYPE_STATION:
4409         case NL80211_IFTYPE_P2P_CLIENT:
4410                 /* ignore uAPSD data */
4411                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4412
4413                 /* these are disallowed */
4414                 if (params.sta_flags_mask &
4415                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4416                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4417                         return -EINVAL;
4418                 /* Only TDLS peers can be added */
4419                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4420                         return -EINVAL;
4421                 /* Can only add if TDLS ... */
4422                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4423                         return -EOPNOTSUPP;
4424                 /* ... with external setup is supported */
4425                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4426                         return -EOPNOTSUPP;
4427                 /*
4428                  * Older wpa_supplicant versions always mark the TDLS peer
4429                  * as authorized, but it shouldn't yet be.
4430                  */
4431                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4432                 break;
4433         default:
4434                 return -EOPNOTSUPP;
4435         }
4436
4437         /* be aware of params.vlan when changing code here */
4438
4439         err = rdev_add_station(rdev, dev, mac_addr, &params);
4440
4441         if (params.vlan)
4442                 dev_put(params.vlan);
4443         return err;
4444 }
4445
4446 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4447 {
4448         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4449         struct net_device *dev = info->user_ptr[1];
4450         struct station_del_parameters params;
4451
4452         memset(&params, 0, sizeof(params));
4453
4454         if (info->attrs[NL80211_ATTR_MAC])
4455                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4456
4457         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4458             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4459             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4460             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4461                 return -EINVAL;
4462
4463         if (!rdev->ops->del_station)
4464                 return -EOPNOTSUPP;
4465
4466         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4467                 params.subtype =
4468                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4469                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4470                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4471                         return -EINVAL;
4472         } else {
4473                 /* Default to Deauthentication frame */
4474                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4475         }
4476
4477         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4478                 params.reason_code =
4479                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4480                 if (params.reason_code == 0)
4481                         return -EINVAL; /* 0 is reserved */
4482         } else {
4483                 /* Default to reason code 2 */
4484                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4485         }
4486
4487         return rdev_del_station(rdev, dev, &params);
4488 }
4489
4490 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4491                                 int flags, struct net_device *dev,
4492                                 u8 *dst, u8 *next_hop,
4493                                 struct mpath_info *pinfo)
4494 {
4495         void *hdr;
4496         struct nlattr *pinfoattr;
4497
4498         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4499         if (!hdr)
4500                 return -1;
4501
4502         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4503             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4504             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4505             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4506                 goto nla_put_failure;
4507
4508         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4509         if (!pinfoattr)
4510                 goto nla_put_failure;
4511         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4512             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4513                         pinfo->frame_qlen))
4514                 goto nla_put_failure;
4515         if (((pinfo->filled & MPATH_INFO_SN) &&
4516              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4517             ((pinfo->filled & MPATH_INFO_METRIC) &&
4518              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4519                          pinfo->metric)) ||
4520             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4521              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4522                          pinfo->exptime)) ||
4523             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4524              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4525                         pinfo->flags)) ||
4526             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4527              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4528                          pinfo->discovery_timeout)) ||
4529             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4530              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4531                         pinfo->discovery_retries)))
4532                 goto nla_put_failure;
4533
4534         nla_nest_end(msg, pinfoattr);
4535
4536         return genlmsg_end(msg, hdr);
4537
4538  nla_put_failure:
4539         genlmsg_cancel(msg, hdr);
4540         return -EMSGSIZE;
4541 }
4542
4543 static int nl80211_dump_mpath(struct sk_buff *skb,
4544                               struct netlink_callback *cb)
4545 {
4546         struct mpath_info pinfo;
4547         struct cfg80211_registered_device *rdev;
4548         struct wireless_dev *wdev;
4549         u8 dst[ETH_ALEN];
4550         u8 next_hop[ETH_ALEN];
4551         int path_idx = cb->args[2];
4552         int err;
4553
4554         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4555         if (err)
4556                 return err;
4557
4558         if (!rdev->ops->dump_mpath) {
4559                 err = -EOPNOTSUPP;
4560                 goto out_err;
4561         }
4562
4563         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4564                 err = -EOPNOTSUPP;
4565                 goto out_err;
4566         }
4567
4568         while (1) {
4569                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4570                                       next_hop, &pinfo);
4571                 if (err == -ENOENT)
4572                         break;
4573                 if (err)
4574                         goto out_err;
4575
4576                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4577                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4578                                        wdev->netdev, dst, next_hop,
4579                                        &pinfo) < 0)
4580                         goto out;
4581
4582                 path_idx++;
4583         }
4584
4585
4586  out:
4587         cb->args[2] = path_idx;
4588         err = skb->len;
4589  out_err:
4590         nl80211_finish_wdev_dump(rdev);
4591         return err;
4592 }
4593
4594 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4595 {
4596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4597         int err;
4598         struct net_device *dev = info->user_ptr[1];
4599         struct mpath_info pinfo;
4600         struct sk_buff *msg;
4601         u8 *dst = NULL;
4602         u8 next_hop[ETH_ALEN];
4603
4604         memset(&pinfo, 0, sizeof(pinfo));
4605
4606         if (!info->attrs[NL80211_ATTR_MAC])
4607                 return -EINVAL;
4608
4609         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4610
4611         if (!rdev->ops->get_mpath)
4612                 return -EOPNOTSUPP;
4613
4614         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4615                 return -EOPNOTSUPP;
4616
4617         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4618         if (err)
4619                 return err;
4620
4621         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4622         if (!msg)
4623                 return -ENOMEM;
4624
4625         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4626                                  dev, dst, next_hop, &pinfo) < 0) {
4627                 nlmsg_free(msg);
4628                 return -ENOBUFS;
4629         }
4630
4631         return genlmsg_reply(msg, info);
4632 }
4633
4634 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4635 {
4636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4637         struct net_device *dev = info->user_ptr[1];
4638         u8 *dst = NULL;
4639         u8 *next_hop = NULL;
4640
4641         if (!info->attrs[NL80211_ATTR_MAC])
4642                 return -EINVAL;
4643
4644         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4645                 return -EINVAL;
4646
4647         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4648         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4649
4650         if (!rdev->ops->change_mpath)
4651                 return -EOPNOTSUPP;
4652
4653         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4654                 return -EOPNOTSUPP;
4655
4656         return rdev_change_mpath(rdev, dev, dst, next_hop);
4657 }
4658
4659 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4660 {
4661         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4662         struct net_device *dev = info->user_ptr[1];
4663         u8 *dst = NULL;
4664         u8 *next_hop = NULL;
4665
4666         if (!info->attrs[NL80211_ATTR_MAC])
4667                 return -EINVAL;
4668
4669         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4670                 return -EINVAL;
4671
4672         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4673         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4674
4675         if (!rdev->ops->add_mpath)
4676                 return -EOPNOTSUPP;
4677
4678         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4679                 return -EOPNOTSUPP;
4680
4681         return rdev_add_mpath(rdev, dev, dst, next_hop);
4682 }
4683
4684 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4685 {
4686         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4687         struct net_device *dev = info->user_ptr[1];
4688         u8 *dst = NULL;
4689
4690         if (info->attrs[NL80211_ATTR_MAC])
4691                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4692
4693         if (!rdev->ops->del_mpath)
4694                 return -EOPNOTSUPP;
4695
4696         return rdev_del_mpath(rdev, dev, dst);
4697 }
4698
4699 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4700 {
4701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4702         int err;
4703         struct net_device *dev = info->user_ptr[1];
4704         struct mpath_info pinfo;
4705         struct sk_buff *msg;
4706         u8 *dst = NULL;
4707         u8 mpp[ETH_ALEN];
4708
4709         memset(&pinfo, 0, sizeof(pinfo));
4710
4711         if (!info->attrs[NL80211_ATTR_MAC])
4712                 return -EINVAL;
4713
4714         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4715
4716         if (!rdev->ops->get_mpp)
4717                 return -EOPNOTSUPP;
4718
4719         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4720                 return -EOPNOTSUPP;
4721
4722         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4723         if (err)
4724                 return err;
4725
4726         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4727         if (!msg)
4728                 return -ENOMEM;
4729
4730         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4731                                dev, dst, mpp, &pinfo) < 0) {
4732                 nlmsg_free(msg);
4733                 return -ENOBUFS;
4734         }
4735
4736         return genlmsg_reply(msg, info);
4737 }
4738
4739 static int nl80211_dump_mpp(struct sk_buff *skb,
4740                             struct netlink_callback *cb)
4741 {
4742         struct mpath_info pinfo;
4743         struct cfg80211_registered_device *rdev;
4744         struct wireless_dev *wdev;
4745         u8 dst[ETH_ALEN];
4746         u8 mpp[ETH_ALEN];
4747         int path_idx = cb->args[2];
4748         int err;
4749
4750         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4751         if (err)
4752                 return err;
4753
4754         if (!rdev->ops->dump_mpp) {
4755                 err = -EOPNOTSUPP;
4756                 goto out_err;
4757         }
4758
4759         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4760                 err = -EOPNOTSUPP;
4761                 goto out_err;
4762         }
4763
4764         while (1) {
4765                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4766                                     mpp, &pinfo);
4767                 if (err == -ENOENT)
4768                         break;
4769                 if (err)
4770                         goto out_err;
4771
4772                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4773                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4774                                        wdev->netdev, dst, mpp,
4775                                        &pinfo) < 0)
4776                         goto out;
4777
4778                 path_idx++;
4779         }
4780
4781  out:
4782         cb->args[2] = path_idx;
4783         err = skb->len;
4784  out_err:
4785         nl80211_finish_wdev_dump(rdev);
4786         return err;
4787 }
4788
4789 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4790 {
4791         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4792         struct net_device *dev = info->user_ptr[1];
4793         struct wireless_dev *wdev = dev->ieee80211_ptr;
4794         struct bss_parameters params;
4795         int err;
4796
4797         memset(&params, 0, sizeof(params));
4798         /* default to not changing parameters */
4799         params.use_cts_prot = -1;
4800         params.use_short_preamble = -1;
4801         params.use_short_slot_time = -1;
4802         params.ap_isolate = -1;
4803         params.ht_opmode = -1;
4804         params.p2p_ctwindow = -1;
4805         params.p2p_opp_ps = -1;
4806
4807         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4808                 params.use_cts_prot =
4809                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4810         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4811                 params.use_short_preamble =
4812                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4813         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4814                 params.use_short_slot_time =
4815                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4816         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4817                 params.basic_rates =
4818                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4819                 params.basic_rates_len =
4820                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4821         }
4822         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4823                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4824         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4825                 params.ht_opmode =
4826                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4827
4828         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4829                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4830                         return -EINVAL;
4831                 params.p2p_ctwindow =
4832                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4833                 if (params.p2p_ctwindow < 0)
4834                         return -EINVAL;
4835                 if (params.p2p_ctwindow != 0 &&
4836                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4837                         return -EINVAL;
4838         }
4839
4840         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4841                 u8 tmp;
4842
4843                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4844                         return -EINVAL;
4845                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4846                 if (tmp > 1)
4847                         return -EINVAL;
4848                 params.p2p_opp_ps = tmp;
4849                 if (params.p2p_opp_ps &&
4850                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4851                         return -EINVAL;
4852         }
4853
4854         if (!rdev->ops->change_bss)
4855                 return -EOPNOTSUPP;
4856
4857         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4858             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4859                 return -EOPNOTSUPP;
4860
4861         wdev_lock(wdev);
4862         err = rdev_change_bss(rdev, dev, &params);
4863         wdev_unlock(wdev);
4864
4865         return err;
4866 }
4867
4868 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4869         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4870         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4871         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4872         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4873         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4874         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4875         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
4876 };
4877
4878 static int parse_reg_rule(struct nlattr *tb[],
4879         struct ieee80211_reg_rule *reg_rule)
4880 {
4881         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4882         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4883
4884         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4885                 return -EINVAL;
4886         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4887                 return -EINVAL;
4888         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4889                 return -EINVAL;
4890         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4891                 return -EINVAL;
4892         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4893                 return -EINVAL;
4894
4895         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4896
4897         freq_range->start_freq_khz =
4898                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4899         freq_range->end_freq_khz =
4900                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4901         freq_range->max_bandwidth_khz =
4902                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4903
4904         power_rule->max_eirp =
4905                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4906
4907         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4908                 power_rule->max_antenna_gain =
4909                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4910
4911         if (tb[NL80211_ATTR_DFS_CAC_TIME])
4912                 reg_rule->dfs_cac_ms =
4913                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
4914
4915         return 0;
4916 }
4917
4918 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4919 {
4920         char *data = NULL;
4921         enum nl80211_user_reg_hint_type user_reg_hint_type;
4922
4923         /*
4924          * You should only get this when cfg80211 hasn't yet initialized
4925          * completely when built-in to the kernel right between the time
4926          * window between nl80211_init() and regulatory_init(), if that is
4927          * even possible.
4928          */
4929         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4930                 return -EINPROGRESS;
4931
4932         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4933                 user_reg_hint_type =
4934                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4935         else
4936                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4937
4938         switch (user_reg_hint_type) {
4939         case NL80211_USER_REG_HINT_USER:
4940         case NL80211_USER_REG_HINT_CELL_BASE:
4941                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4942                         return -EINVAL;
4943
4944                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4945                 return regulatory_hint_user(data, user_reg_hint_type);
4946         case NL80211_USER_REG_HINT_INDOOR:
4947                 return regulatory_hint_indoor_user();
4948         default:
4949                 return -EINVAL;
4950         }
4951 }
4952
4953 static int nl80211_get_mesh_config(struct sk_buff *skb,
4954                                    struct genl_info *info)
4955 {
4956         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4957         struct net_device *dev = info->user_ptr[1];
4958         struct wireless_dev *wdev = dev->ieee80211_ptr;
4959         struct mesh_config cur_params;
4960         int err = 0;
4961         void *hdr;
4962         struct nlattr *pinfoattr;
4963         struct sk_buff *msg;
4964
4965         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4966                 return -EOPNOTSUPP;
4967
4968         if (!rdev->ops->get_mesh_config)
4969                 return -EOPNOTSUPP;
4970
4971         wdev_lock(wdev);
4972         /* If not connected, get default parameters */
4973         if (!wdev->mesh_id_len)
4974                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4975         else
4976                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4977         wdev_unlock(wdev);
4978
4979         if (err)
4980                 return err;
4981
4982         /* Draw up a netlink message to send back */
4983         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4984         if (!msg)
4985                 return -ENOMEM;
4986         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4987                              NL80211_CMD_GET_MESH_CONFIG);
4988         if (!hdr)
4989                 goto out;
4990         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4991         if (!pinfoattr)
4992                 goto nla_put_failure;
4993         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4994             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4995                         cur_params.dot11MeshRetryTimeout) ||
4996             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4997                         cur_params.dot11MeshConfirmTimeout) ||
4998             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4999                         cur_params.dot11MeshHoldingTimeout) ||
5000             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5001                         cur_params.dot11MeshMaxPeerLinks) ||
5002             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5003                        cur_params.dot11MeshMaxRetries) ||
5004             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5005                        cur_params.dot11MeshTTL) ||
5006             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5007                        cur_params.element_ttl) ||
5008             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5009                        cur_params.auto_open_plinks) ||
5010             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5011                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5012             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5013                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5014             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5015                         cur_params.path_refresh_time) ||
5016             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5017                         cur_params.min_discovery_timeout) ||
5018             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5019                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5020             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5021                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5022             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5023                         cur_params.dot11MeshHWMPperrMinInterval) ||
5024             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5025                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5026             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5027                        cur_params.dot11MeshHWMPRootMode) ||
5028             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5029                         cur_params.dot11MeshHWMPRannInterval) ||
5030             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5031                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5032             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5033                        cur_params.dot11MeshForwarding) ||
5034             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5035                         cur_params.rssi_threshold) ||
5036             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5037                         cur_params.ht_opmode) ||
5038             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5039                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5040             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5041                         cur_params.dot11MeshHWMProotInterval) ||
5042             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5043                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5044             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5045                         cur_params.power_mode) ||
5046             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5047                         cur_params.dot11MeshAwakeWindowDuration) ||
5048             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5049                         cur_params.plink_timeout))
5050                 goto nla_put_failure;
5051         nla_nest_end(msg, pinfoattr);
5052         genlmsg_end(msg, hdr);
5053         return genlmsg_reply(msg, info);
5054
5055  nla_put_failure:
5056         genlmsg_cancel(msg, hdr);
5057  out:
5058         nlmsg_free(msg);
5059         return -ENOBUFS;
5060 }
5061
5062 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5063         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5064         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5065         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5066         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5067         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5068         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5069         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5070         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5071         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5072         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5073         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5074         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5075         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5076         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5077         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5078         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5079         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5080         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5081         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5082         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5083         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5084         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5085         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5086         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5087         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5088         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5089         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5090         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5091 };
5092
5093 static const struct nla_policy
5094         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5095         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5096         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5097         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5098         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5099         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5100         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5101         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5102                                     .len = IEEE80211_MAX_DATA_LEN },
5103         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5104 };
5105
5106 static int nl80211_parse_mesh_config(struct genl_info *info,
5107                                      struct mesh_config *cfg,
5108                                      u32 *mask_out)
5109 {
5110         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5111         u32 mask = 0;
5112
5113 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5114 do {                                                                        \
5115         if (tb[attr]) {                                                     \
5116                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5117                         return -EINVAL;                                     \
5118                 cfg->param = fn(tb[attr]);                                  \
5119                 mask |= (1 << (attr - 1));                                  \
5120         }                                                                   \
5121 } while (0)
5122
5123
5124         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5125                 return -EINVAL;
5126         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5127                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5128                              nl80211_meshconf_params_policy))
5129                 return -EINVAL;
5130
5131         /* This makes sure that there aren't more than 32 mesh config
5132          * parameters (otherwise our bitfield scheme would not work.) */
5133         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5134
5135         /* Fill in the params struct */
5136         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5137                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5138                                   nla_get_u16);
5139         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5140                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5141                                   nla_get_u16);
5142         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5143                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5144                                   nla_get_u16);
5145         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5146                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5147                                   nla_get_u16);
5148         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5149                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5150                                   nla_get_u8);
5151         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5152                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5153         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5154                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5155                                   nla_get_u8);
5156         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5157                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5158                                   nla_get_u8);
5159         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5160                                   1, 255, mask,
5161                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5162                                   nla_get_u32);
5163         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5164                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5165                                   nla_get_u8);
5166         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5167                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5168                                   nla_get_u32);
5169         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5170                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5171                                   nla_get_u16);
5172         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5173                                   1, 65535, mask,
5174                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5175                                   nla_get_u32);
5176         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5177                                   1, 65535, mask,
5178                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5179                                   nla_get_u16);
5180         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5181                                   1, 65535, mask,
5182                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5183                                   nla_get_u16);
5184         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5185                                   dot11MeshHWMPnetDiameterTraversalTime,
5186                                   1, 65535, mask,
5187                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5188                                   nla_get_u16);
5189         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5190                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5191                                   nla_get_u8);
5192         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5193                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5194                                   nla_get_u16);
5195         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5196                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5197                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5198                                   nla_get_u8);
5199         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5200                                   mask, NL80211_MESHCONF_FORWARDING,
5201                                   nla_get_u8);
5202         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5203                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5204                                   nla_get_s32);
5205         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5206                                   mask, NL80211_MESHCONF_HT_OPMODE,
5207                                   nla_get_u16);
5208         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5209                                   1, 65535, mask,
5210                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5211                                   nla_get_u32);
5212         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5213                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5214                                   nla_get_u16);
5215         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5216                                   dot11MeshHWMPconfirmationInterval,
5217                                   1, 65535, mask,
5218                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5219                                   nla_get_u16);
5220         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5221                                   NL80211_MESH_POWER_ACTIVE,
5222                                   NL80211_MESH_POWER_MAX,
5223                                   mask, NL80211_MESHCONF_POWER_MODE,
5224                                   nla_get_u32);
5225         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5226                                   0, 65535, mask,
5227                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5228         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
5229                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5230                                   nla_get_u32);
5231         if (mask_out)
5232                 *mask_out = mask;
5233
5234         return 0;
5235
5236 #undef FILL_IN_MESH_PARAM_IF_SET
5237 }
5238
5239 static int nl80211_parse_mesh_setup(struct genl_info *info,
5240                                      struct mesh_setup *setup)
5241 {
5242         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5243         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5244
5245         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5246                 return -EINVAL;
5247         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5248                              info->attrs[NL80211_ATTR_MESH_SETUP],
5249                              nl80211_mesh_setup_params_policy))
5250                 return -EINVAL;
5251
5252         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5253                 setup->sync_method =
5254                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5255                  IEEE80211_SYNC_METHOD_VENDOR :
5256                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5257
5258         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5259                 setup->path_sel_proto =
5260                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5261                  IEEE80211_PATH_PROTOCOL_VENDOR :
5262                  IEEE80211_PATH_PROTOCOL_HWMP;
5263
5264         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5265                 setup->path_metric =
5266                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5267                  IEEE80211_PATH_METRIC_VENDOR :
5268                  IEEE80211_PATH_METRIC_AIRTIME;
5269
5270
5271         if (tb[NL80211_MESH_SETUP_IE]) {
5272                 struct nlattr *ieattr =
5273                         tb[NL80211_MESH_SETUP_IE];
5274                 if (!is_valid_ie_attr(ieattr))
5275                         return -EINVAL;
5276                 setup->ie = nla_data(ieattr);
5277                 setup->ie_len = nla_len(ieattr);
5278         }
5279         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5280             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5281                 return -EINVAL;
5282         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5283         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5284         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5285         if (setup->is_secure)
5286                 setup->user_mpm = true;
5287
5288         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5289                 if (!setup->user_mpm)
5290                         return -EINVAL;
5291                 setup->auth_id =
5292                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5293         }
5294
5295         return 0;
5296 }
5297
5298 static int nl80211_update_mesh_config(struct sk_buff *skb,
5299                                       struct genl_info *info)
5300 {
5301         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5302         struct net_device *dev = info->user_ptr[1];
5303         struct wireless_dev *wdev = dev->ieee80211_ptr;
5304         struct mesh_config cfg;
5305         u32 mask;
5306         int err;
5307
5308         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5309                 return -EOPNOTSUPP;
5310
5311         if (!rdev->ops->update_mesh_config)
5312                 return -EOPNOTSUPP;
5313
5314         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5315         if (err)
5316                 return err;
5317
5318         wdev_lock(wdev);
5319         if (!wdev->mesh_id_len)
5320                 err = -ENOLINK;
5321
5322         if (!err)
5323                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5324
5325         wdev_unlock(wdev);
5326
5327         return err;
5328 }
5329
5330 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5331 {
5332         const struct ieee80211_regdomain *regdom;
5333         struct sk_buff *msg;
5334         void *hdr = NULL;
5335         struct nlattr *nl_reg_rules;
5336         unsigned int i;
5337
5338         if (!cfg80211_regdomain)
5339                 return -EINVAL;
5340
5341         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5342         if (!msg)
5343                 return -ENOBUFS;
5344
5345         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5346                              NL80211_CMD_GET_REG);
5347         if (!hdr)
5348                 goto put_failure;
5349
5350         if (reg_last_request_cell_base() &&
5351             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5352                         NL80211_USER_REG_HINT_CELL_BASE))
5353                 goto nla_put_failure;
5354
5355         rcu_read_lock();
5356         regdom = rcu_dereference(cfg80211_regdomain);
5357
5358         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5359             (regdom->dfs_region &&
5360              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5361                 goto nla_put_failure_rcu;
5362
5363         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5364         if (!nl_reg_rules)
5365                 goto nla_put_failure_rcu;
5366
5367         for (i = 0; i < regdom->n_reg_rules; i++) {
5368                 struct nlattr *nl_reg_rule;
5369                 const struct ieee80211_reg_rule *reg_rule;
5370                 const struct ieee80211_freq_range *freq_range;
5371                 const struct ieee80211_power_rule *power_rule;
5372                 unsigned int max_bandwidth_khz;
5373
5374                 reg_rule = &regdom->reg_rules[i];
5375                 freq_range = &reg_rule->freq_range;
5376                 power_rule = &reg_rule->power_rule;
5377
5378                 nl_reg_rule = nla_nest_start(msg, i);
5379                 if (!nl_reg_rule)
5380                         goto nla_put_failure_rcu;
5381
5382                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5383                 if (!max_bandwidth_khz)
5384                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5385                                                                   reg_rule);
5386
5387                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5388                                 reg_rule->flags) ||
5389                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5390                                 freq_range->start_freq_khz) ||
5391                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5392                                 freq_range->end_freq_khz) ||
5393                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5394                                 max_bandwidth_khz) ||
5395                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5396                                 power_rule->max_antenna_gain) ||
5397                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5398                                 power_rule->max_eirp) ||
5399                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5400                                 reg_rule->dfs_cac_ms))
5401                         goto nla_put_failure_rcu;
5402
5403                 nla_nest_end(msg, nl_reg_rule);
5404         }
5405         rcu_read_unlock();
5406
5407         nla_nest_end(msg, nl_reg_rules);
5408
5409         genlmsg_end(msg, hdr);
5410         return genlmsg_reply(msg, info);
5411
5412 nla_put_failure_rcu:
5413         rcu_read_unlock();
5414 nla_put_failure:
5415         genlmsg_cancel(msg, hdr);
5416 put_failure:
5417         nlmsg_free(msg);
5418         return -EMSGSIZE;
5419 }
5420
5421 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5422 {
5423         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5424         struct nlattr *nl_reg_rule;
5425         char *alpha2;
5426         int rem_reg_rules, r;
5427         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5428         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5429         struct ieee80211_regdomain *rd;
5430
5431         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5432                 return -EINVAL;
5433
5434         if (!info->attrs[NL80211_ATTR_REG_RULES])
5435                 return -EINVAL;
5436
5437         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5438
5439         if (info->attrs[NL80211_ATTR_DFS_REGION])
5440                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5441
5442         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5443                             rem_reg_rules) {
5444                 num_rules++;
5445                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5446                         return -EINVAL;
5447         }
5448
5449         if (!reg_is_valid_request(alpha2))
5450                 return -EINVAL;
5451
5452         size_of_regd = sizeof(struct ieee80211_regdomain) +
5453                        num_rules * sizeof(struct ieee80211_reg_rule);
5454
5455         rd = kzalloc(size_of_regd, GFP_KERNEL);
5456         if (!rd)
5457                 return -ENOMEM;
5458
5459         rd->n_reg_rules = num_rules;
5460         rd->alpha2[0] = alpha2[0];
5461         rd->alpha2[1] = alpha2[1];
5462
5463         /*
5464          * Disable DFS master mode if the DFS region was
5465          * not supported or known on this kernel.
5466          */
5467         if (reg_supported_dfs_region(dfs_region))
5468                 rd->dfs_region = dfs_region;
5469
5470         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5471                             rem_reg_rules) {
5472                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5473                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5474                               reg_rule_policy);
5475                 if (r)
5476                         goto bad_reg;
5477                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5478                 if (r)
5479                         goto bad_reg;
5480
5481                 rule_idx++;
5482
5483                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5484                         r = -EINVAL;
5485                         goto bad_reg;
5486                 }
5487         }
5488
5489         r = set_regdom(rd);
5490         /* set_regdom took ownership */
5491         rd = NULL;
5492
5493  bad_reg:
5494         kfree(rd);
5495         return r;
5496 }
5497
5498 static int validate_scan_freqs(struct nlattr *freqs)
5499 {
5500         struct nlattr *attr1, *attr2;
5501         int n_channels = 0, tmp1, tmp2;
5502
5503         nla_for_each_nested(attr1, freqs, tmp1) {
5504                 n_channels++;
5505                 /*
5506                  * Some hardware has a limited channel list for
5507                  * scanning, and it is pretty much nonsensical
5508                  * to scan for a channel twice, so disallow that
5509                  * and don't require drivers to check that the
5510                  * channel list they get isn't longer than what
5511                  * they can scan, as long as they can scan all
5512                  * the channels they registered at once.
5513                  */
5514                 nla_for_each_nested(attr2, freqs, tmp2)
5515                         if (attr1 != attr2 &&
5516                             nla_get_u32(attr1) == nla_get_u32(attr2))
5517                                 return 0;
5518         }
5519
5520         return n_channels;
5521 }
5522
5523 static int nl80211_parse_random_mac(struct nlattr **attrs,
5524                                     u8 *mac_addr, u8 *mac_addr_mask)
5525 {
5526         int i;
5527
5528         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5529                 memset(mac_addr, 0, ETH_ALEN);
5530                 memset(mac_addr_mask, 0, ETH_ALEN);
5531                 mac_addr[0] = 0x2;
5532                 mac_addr_mask[0] = 0x3;
5533
5534                 return 0;
5535         }
5536
5537         /* need both or none */
5538         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5539                 return -EINVAL;
5540
5541         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5542         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5543
5544         /* don't allow or configure an mcast address */
5545         if (!is_multicast_ether_addr(mac_addr_mask) ||
5546             is_multicast_ether_addr(mac_addr))
5547                 return -EINVAL;
5548
5549         /*
5550          * allow users to pass a MAC address that has bits set outside
5551          * of the mask, but don't bother drivers with having to deal
5552          * with such bits
5553          */
5554         for (i = 0; i < ETH_ALEN; i++)
5555                 mac_addr[i] &= mac_addr_mask[i];
5556
5557         return 0;
5558 }
5559
5560 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5561 {
5562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5563         struct wireless_dev *wdev = info->user_ptr[1];
5564         struct cfg80211_scan_request *request;
5565         struct nlattr *attr;
5566         struct wiphy *wiphy;
5567         int err, tmp, n_ssids = 0, n_channels, i;
5568         size_t ie_len;
5569
5570         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5571                 return -EINVAL;
5572
5573         wiphy = &rdev->wiphy;
5574
5575         if (!rdev->ops->scan)
5576                 return -EOPNOTSUPP;
5577
5578         if (rdev->scan_req || rdev->scan_msg) {
5579                 err = -EBUSY;
5580                 goto unlock;
5581         }
5582
5583         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5584                 n_channels = validate_scan_freqs(
5585                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5586                 if (!n_channels) {
5587                         err = -EINVAL;
5588                         goto unlock;
5589                 }
5590         } else {
5591                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5592         }
5593
5594         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5595                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5596                         n_ssids++;
5597
5598         if (n_ssids > wiphy->max_scan_ssids) {
5599                 err = -EINVAL;
5600                 goto unlock;
5601         }
5602
5603         if (info->attrs[NL80211_ATTR_IE])
5604                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5605         else
5606                 ie_len = 0;
5607
5608         if (ie_len > wiphy->max_scan_ie_len) {
5609                 err = -EINVAL;
5610                 goto unlock;
5611         }
5612
5613         request = kzalloc(sizeof(*request)
5614                         + sizeof(*request->ssids) * n_ssids
5615                         + sizeof(*request->channels) * n_channels
5616                         + ie_len, GFP_KERNEL);
5617         if (!request) {
5618                 err = -ENOMEM;
5619                 goto unlock;
5620         }
5621
5622         if (n_ssids)
5623                 request->ssids = (void *)&request->channels[n_channels];
5624         request->n_ssids = n_ssids;
5625         if (ie_len) {
5626                 if (request->ssids)
5627                         request->ie = (void *)(request->ssids + n_ssids);
5628                 else
5629                         request->ie = (void *)(request->channels + n_channels);
5630         }
5631
5632         i = 0;
5633         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5634                 /* user specified, bail out if channel not found */
5635                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5636                         struct ieee80211_channel *chan;
5637
5638                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5639
5640                         if (!chan) {
5641                                 err = -EINVAL;
5642                                 goto out_free;
5643                         }
5644
5645                         /* ignore disabled channels */
5646                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5647                                 continue;
5648
5649                         request->channels[i] = chan;
5650                         i++;
5651                 }
5652         } else {
5653                 enum ieee80211_band band;
5654
5655                 /* all channels */
5656                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5657                         int j;
5658                         if (!wiphy->bands[band])
5659                                 continue;
5660                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5661                                 struct ieee80211_channel *chan;
5662
5663                                 chan = &wiphy->bands[band]->channels[j];
5664
5665                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5666                                         continue;
5667
5668                                 request->channels[i] = chan;
5669                                 i++;
5670                         }
5671                 }
5672         }
5673
5674         if (!i) {
5675                 err = -EINVAL;
5676                 goto out_free;
5677         }
5678
5679         request->n_channels = i;
5680
5681         i = 0;
5682         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5683                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5684                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5685                                 err = -EINVAL;
5686                                 goto out_free;
5687                         }
5688                         request->ssids[i].ssid_len = nla_len(attr);
5689                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5690                         i++;
5691                 }
5692         }
5693
5694         if (info->attrs[NL80211_ATTR_IE]) {
5695                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5696                 memcpy((void *)request->ie,
5697                        nla_data(info->attrs[NL80211_ATTR_IE]),
5698                        request->ie_len);
5699         }
5700
5701         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5702                 if (wiphy->bands[i])
5703                         request->rates[i] =
5704                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5705
5706         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5707                 nla_for_each_nested(attr,
5708                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5709                                     tmp) {
5710                         enum ieee80211_band band = nla_type(attr);
5711
5712                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5713                                 err = -EINVAL;
5714                                 goto out_free;
5715                         }
5716
5717                         if (!wiphy->bands[band])
5718                                 continue;
5719
5720                         err = ieee80211_get_ratemask(wiphy->bands[band],
5721                                                      nla_data(attr),
5722                                                      nla_len(attr),
5723                                                      &request->rates[band]);
5724                         if (err)
5725                                 goto out_free;
5726                 }
5727         }
5728
5729         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5730                 request->flags = nla_get_u32(
5731                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5732                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5733                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
5734                         err = -EOPNOTSUPP;
5735                         goto out_free;
5736                 }
5737
5738                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
5739                         if (!(wiphy->features &
5740                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
5741                                 err = -EOPNOTSUPP;
5742                                 goto out_free;
5743                         }
5744
5745                         if (wdev->current_bss) {
5746                                 err = -EOPNOTSUPP;
5747                                 goto out_free;
5748                         }
5749
5750                         err = nl80211_parse_random_mac(info->attrs,
5751                                                        request->mac_addr,
5752                                                        request->mac_addr_mask);
5753                         if (err)
5754                                 goto out_free;
5755                 }
5756         }
5757
5758         request->no_cck =
5759                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5760
5761         request->wdev = wdev;
5762         request->wiphy = &rdev->wiphy;
5763         request->scan_start = jiffies;
5764
5765         rdev->scan_req = request;
5766         err = rdev_scan(rdev, request);
5767
5768         if (!err) {
5769                 nl80211_send_scan_start(rdev, wdev);
5770                 if (wdev->netdev)
5771                         dev_hold(wdev->netdev);
5772         } else {
5773  out_free:
5774                 rdev->scan_req = NULL;
5775                 kfree(request);
5776         }
5777
5778  unlock:
5779         return err;
5780 }
5781
5782 static struct cfg80211_sched_scan_request *
5783 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
5784                          struct nlattr **attrs)
5785 {
5786         struct cfg80211_sched_scan_request *request;
5787         struct nlattr *attr;
5788         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5789         u32 interval;
5790         enum ieee80211_band band;
5791         size_t ie_len;
5792         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5793         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
5794
5795         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
5796                 return ERR_PTR(-EINVAL);
5797
5798         if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5799                 return ERR_PTR(-EINVAL);
5800
5801         interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5802         if (interval == 0)
5803                 return ERR_PTR(-EINVAL);
5804
5805         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5806                 n_channels = validate_scan_freqs(
5807                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5808                 if (!n_channels)
5809                         return ERR_PTR(-EINVAL);
5810         } else {
5811                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5812         }
5813
5814         if (attrs[NL80211_ATTR_SCAN_SSIDS])
5815                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
5816                                     tmp)
5817                         n_ssids++;
5818
5819         if (n_ssids > wiphy->max_sched_scan_ssids)
5820                 return ERR_PTR(-EINVAL);
5821
5822         /*
5823          * First, count the number of 'real' matchsets. Due to an issue with
5824          * the old implementation, matchsets containing only the RSSI attribute
5825          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
5826          * RSSI for all matchsets, rather than their own matchset for reporting
5827          * all APs with a strong RSSI. This is needed to be compatible with
5828          * older userspace that treated a matchset with only the RSSI as the
5829          * global RSSI for all other matchsets - if there are other matchsets.
5830          */
5831         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5832                 nla_for_each_nested(attr,
5833                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5834                                     tmp) {
5835                         struct nlattr *rssi;
5836
5837                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5838                                         nla_data(attr), nla_len(attr),
5839                                         nl80211_match_policy);
5840                         if (err)
5841                                 return ERR_PTR(err);
5842                         /* add other standalone attributes here */
5843                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
5844                                 n_match_sets++;
5845                                 continue;
5846                         }
5847                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5848                         if (rssi)
5849                                 default_match_rssi = nla_get_s32(rssi);
5850                 }
5851         }
5852
5853         /* However, if there's no other matchset, add the RSSI one */
5854         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
5855                 n_match_sets = 1;
5856
5857         if (n_match_sets > wiphy->max_match_sets)
5858                 return ERR_PTR(-EINVAL);
5859
5860         if (attrs[NL80211_ATTR_IE])
5861                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
5862         else
5863                 ie_len = 0;
5864
5865         if (ie_len > wiphy->max_sched_scan_ie_len)
5866                 return ERR_PTR(-EINVAL);
5867
5868         request = kzalloc(sizeof(*request)
5869                         + sizeof(*request->ssids) * n_ssids
5870                         + sizeof(*request->match_sets) * n_match_sets
5871                         + sizeof(*request->channels) * n_channels
5872                         + ie_len, GFP_KERNEL);
5873         if (!request)
5874                 return ERR_PTR(-ENOMEM);
5875
5876         if (n_ssids)
5877                 request->ssids = (void *)&request->channels[n_channels];
5878         request->n_ssids = n_ssids;
5879         if (ie_len) {
5880                 if (request->ssids)
5881                         request->ie = (void *)(request->ssids + n_ssids);
5882                 else
5883                         request->ie = (void *)(request->channels + n_channels);
5884         }
5885
5886         if (n_match_sets) {
5887                 if (request->ie)
5888                         request->match_sets = (void *)(request->ie + ie_len);
5889                 else if (request->ssids)
5890                         request->match_sets =
5891                                 (void *)(request->ssids + n_ssids);
5892                 else
5893                         request->match_sets =
5894                                 (void *)(request->channels + n_channels);
5895         }
5896         request->n_match_sets = n_match_sets;
5897
5898         i = 0;
5899         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5900                 /* user specified, bail out if channel not found */
5901                 nla_for_each_nested(attr,
5902                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5903                                     tmp) {
5904                         struct ieee80211_channel *chan;
5905
5906                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5907
5908                         if (!chan) {
5909                                 err = -EINVAL;
5910                                 goto out_free;
5911                         }
5912
5913                         /* ignore disabled channels */
5914                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5915                                 continue;
5916
5917                         request->channels[i] = chan;
5918                         i++;
5919                 }
5920         } else {
5921                 /* all channels */
5922                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5923                         int j;
5924                         if (!wiphy->bands[band])
5925                                 continue;
5926                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5927                                 struct ieee80211_channel *chan;
5928
5929                                 chan = &wiphy->bands[band]->channels[j];
5930
5931                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5932                                         continue;
5933
5934                                 request->channels[i] = chan;
5935                                 i++;
5936                         }
5937                 }
5938         }
5939
5940         if (!i) {
5941                 err = -EINVAL;
5942                 goto out_free;
5943         }
5944
5945         request->n_channels = i;
5946
5947         i = 0;
5948         if (attrs[NL80211_ATTR_SCAN_SSIDS]) {
5949                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
5950                                     tmp) {
5951                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5952                                 err = -EINVAL;
5953                                 goto out_free;
5954                         }
5955                         request->ssids[i].ssid_len = nla_len(attr);
5956                         memcpy(request->ssids[i].ssid, nla_data(attr),
5957                                nla_len(attr));
5958                         i++;
5959                 }
5960         }
5961
5962         i = 0;
5963         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5964                 nla_for_each_nested(attr,
5965                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5966                                     tmp) {
5967                         struct nlattr *ssid, *rssi;
5968
5969                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5970                                         nla_data(attr), nla_len(attr),
5971                                         nl80211_match_policy);
5972                         if (err)
5973                                 goto out_free;
5974                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5975                         if (ssid) {
5976                                 if (WARN_ON(i >= n_match_sets)) {
5977                                         /* this indicates a programming error,
5978                                          * the loop above should have verified
5979                                          * things properly
5980                                          */
5981                                         err = -EINVAL;
5982                                         goto out_free;
5983                                 }
5984
5985                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5986                                         err = -EINVAL;
5987                                         goto out_free;
5988                                 }
5989                                 memcpy(request->match_sets[i].ssid.ssid,
5990                                        nla_data(ssid), nla_len(ssid));
5991                                 request->match_sets[i].ssid.ssid_len =
5992                                         nla_len(ssid);
5993                                 /* special attribute - old implemenation w/a */
5994                                 request->match_sets[i].rssi_thold =
5995                                         default_match_rssi;
5996                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5997                                 if (rssi)
5998                                         request->match_sets[i].rssi_thold =
5999                                                 nla_get_s32(rssi);
6000                         }
6001                         i++;
6002                 }
6003
6004                 /* there was no other matchset, so the RSSI one is alone */
6005                 if (i == 0)
6006                         request->match_sets[0].rssi_thold = default_match_rssi;
6007
6008                 request->min_rssi_thold = INT_MAX;
6009                 for (i = 0; i < n_match_sets; i++)
6010                         request->min_rssi_thold =
6011                                 min(request->match_sets[i].rssi_thold,
6012                                     request->min_rssi_thold);
6013         } else {
6014                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6015         }
6016
6017         if (ie_len) {
6018                 request->ie_len = ie_len;
6019                 memcpy((void *)request->ie,
6020                        nla_data(attrs[NL80211_ATTR_IE]),
6021                        request->ie_len);
6022         }
6023
6024         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6025                 request->flags = nla_get_u32(
6026                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6027                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6028                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6029                         err = -EOPNOTSUPP;
6030                         goto out_free;
6031                 }
6032
6033                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6034                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6035
6036                         if (!wdev) /* must be net-detect */
6037                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6038
6039                         if (!(wiphy->features & flg)) {
6040                                 err = -EOPNOTSUPP;
6041                                 goto out_free;
6042                         }
6043
6044                         if (wdev && wdev->current_bss) {
6045                                 err = -EOPNOTSUPP;
6046                                 goto out_free;
6047                         }
6048
6049                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6050                                                        request->mac_addr_mask);
6051                         if (err)
6052                                 goto out_free;
6053                 }
6054         }
6055
6056         request->interval = interval;
6057         request->scan_start = jiffies;
6058
6059         return request;
6060
6061 out_free:
6062         kfree(request);
6063         return ERR_PTR(err);
6064 }
6065
6066 static int nl80211_start_sched_scan(struct sk_buff *skb,
6067                                     struct genl_info *info)
6068 {
6069         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6070         struct net_device *dev = info->user_ptr[1];
6071         struct wireless_dev *wdev = dev->ieee80211_ptr;
6072         int err;
6073
6074         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6075             !rdev->ops->sched_scan_start)
6076                 return -EOPNOTSUPP;
6077
6078         if (rdev->sched_scan_req)
6079                 return -EINPROGRESS;
6080
6081         rdev->sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6082                                                         info->attrs);
6083         err = PTR_ERR_OR_ZERO(rdev->sched_scan_req);
6084         if (err)
6085                 goto out_err;
6086
6087         err = rdev_sched_scan_start(rdev, dev, rdev->sched_scan_req);
6088         if (err)
6089                 goto out_free;
6090
6091         rdev->sched_scan_req->dev = dev;
6092         rdev->sched_scan_req->wiphy = &rdev->wiphy;
6093
6094         nl80211_send_sched_scan(rdev, dev,
6095                                 NL80211_CMD_START_SCHED_SCAN);
6096         return 0;
6097
6098 out_free:
6099         kfree(rdev->sched_scan_req);
6100 out_err:
6101         rdev->sched_scan_req = NULL;
6102         return err;
6103 }
6104
6105 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6106                                    struct genl_info *info)
6107 {
6108         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6109
6110         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6111             !rdev->ops->sched_scan_stop)
6112                 return -EOPNOTSUPP;
6113
6114         return __cfg80211_stop_sched_scan(rdev, false);
6115 }
6116
6117 static int nl80211_start_radar_detection(struct sk_buff *skb,
6118                                          struct genl_info *info)
6119 {
6120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6121         struct net_device *dev = info->user_ptr[1];
6122         struct wireless_dev *wdev = dev->ieee80211_ptr;
6123         struct cfg80211_chan_def chandef;
6124         enum nl80211_dfs_regions dfs_region;
6125         unsigned int cac_time_ms;
6126         int err;
6127
6128         dfs_region = reg_get_dfs_region(wdev->wiphy);
6129         if (dfs_region == NL80211_DFS_UNSET)
6130                 return -EINVAL;
6131
6132         err = nl80211_parse_chandef(rdev, info, &chandef);
6133         if (err)
6134                 return err;
6135
6136         if (netif_carrier_ok(dev))
6137                 return -EBUSY;
6138
6139         if (wdev->cac_started)
6140                 return -EBUSY;
6141
6142         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6143                                             wdev->iftype);
6144         if (err < 0)
6145                 return err;
6146
6147         if (err == 0)
6148                 return -EINVAL;
6149
6150         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6151                 return -EINVAL;
6152
6153         if (!rdev->ops->start_radar_detection)
6154                 return -EOPNOTSUPP;
6155
6156         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6157         if (WARN_ON(!cac_time_ms))
6158                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6159
6160         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
6161                                                cac_time_ms);
6162         if (!err) {
6163                 wdev->chandef = chandef;
6164                 wdev->cac_started = true;
6165                 wdev->cac_start_time = jiffies;
6166                 wdev->cac_time_ms = cac_time_ms;
6167         }
6168         return err;
6169 }
6170
6171 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6172 {
6173         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6174         struct net_device *dev = info->user_ptr[1];
6175         struct wireless_dev *wdev = dev->ieee80211_ptr;
6176         struct cfg80211_csa_settings params;
6177         /* csa_attrs is defined static to avoid waste of stack size - this
6178          * function is called under RTNL lock, so this should not be a problem.
6179          */
6180         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6181         int err;
6182         bool need_new_beacon = false;
6183         int len, i;
6184         u32 cs_count;
6185
6186         if (!rdev->ops->channel_switch ||
6187             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6188                 return -EOPNOTSUPP;
6189
6190         switch (dev->ieee80211_ptr->iftype) {
6191         case NL80211_IFTYPE_AP:
6192         case NL80211_IFTYPE_P2P_GO:
6193                 need_new_beacon = true;
6194
6195                 /* useless if AP is not running */
6196                 if (!wdev->beacon_interval)
6197                         return -ENOTCONN;
6198                 break;
6199         case NL80211_IFTYPE_ADHOC:
6200                 if (!wdev->ssid_len)
6201                         return -ENOTCONN;
6202                 break;
6203         case NL80211_IFTYPE_MESH_POINT:
6204                 if (!wdev->mesh_id_len)
6205                         return -ENOTCONN;
6206                 break;
6207         default:
6208                 return -EOPNOTSUPP;
6209         }
6210
6211         memset(&params, 0, sizeof(params));
6212
6213         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6214             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6215                 return -EINVAL;
6216
6217         /* only important for AP, IBSS and mesh create IEs internally */
6218         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6219                 return -EINVAL;
6220
6221         /* Even though the attribute is u32, the specification says
6222          * u8, so let's make sure we don't overflow.
6223          */
6224         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6225         if (cs_count > 255)
6226                 return -EINVAL;
6227
6228         params.count = cs_count;
6229
6230         if (!need_new_beacon)
6231                 goto skip_beacons;
6232
6233         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6234         if (err)
6235                 return err;
6236
6237         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6238                                info->attrs[NL80211_ATTR_CSA_IES],
6239                                nl80211_policy);
6240         if (err)
6241                 return err;
6242
6243         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6244         if (err)
6245                 return err;
6246
6247         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6248                 return -EINVAL;
6249
6250         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6251         if (!len || (len % sizeof(u16)))
6252                 return -EINVAL;
6253
6254         params.n_counter_offsets_beacon = len / sizeof(u16);
6255         if (rdev->wiphy.max_num_csa_counters &&
6256             (params.n_counter_offsets_beacon >
6257              rdev->wiphy.max_num_csa_counters))
6258                 return -EINVAL;
6259
6260         params.counter_offsets_beacon =
6261                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6262
6263         /* sanity checks - counters should fit and be the same */
6264         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6265                 u16 offset = params.counter_offsets_beacon[i];
6266
6267                 if (offset >= params.beacon_csa.tail_len)
6268                         return -EINVAL;
6269
6270                 if (params.beacon_csa.tail[offset] != params.count)
6271                         return -EINVAL;
6272         }
6273
6274         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6275                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6276                 if (!len || (len % sizeof(u16)))
6277                         return -EINVAL;
6278
6279                 params.n_counter_offsets_presp = len / sizeof(u16);
6280                 if (rdev->wiphy.max_num_csa_counters &&
6281                     (params.n_counter_offsets_beacon >
6282                      rdev->wiphy.max_num_csa_counters))
6283                         return -EINVAL;
6284
6285                 params.counter_offsets_presp =
6286                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6287
6288                 /* sanity checks - counters should fit and be the same */
6289                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6290                         u16 offset = params.counter_offsets_presp[i];
6291
6292                         if (offset >= params.beacon_csa.probe_resp_len)
6293                                 return -EINVAL;
6294
6295                         if (params.beacon_csa.probe_resp[offset] !=
6296                             params.count)
6297                                 return -EINVAL;
6298                 }
6299         }
6300
6301 skip_beacons:
6302         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6303         if (err)
6304                 return err;
6305
6306         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef,
6307                                      wdev->iftype))
6308                 return -EINVAL;
6309
6310         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6311                                             &params.chandef,
6312                                             wdev->iftype);
6313         if (err < 0)
6314                 return err;
6315
6316         if (err > 0)
6317                 params.radar_required = true;
6318
6319         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6320                 params.block_tx = true;
6321
6322         wdev_lock(wdev);
6323         err = rdev_channel_switch(rdev, dev, &params);
6324         wdev_unlock(wdev);
6325
6326         return err;
6327 }
6328
6329 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6330                             u32 seq, int flags,
6331                             struct cfg80211_registered_device *rdev,
6332                             struct wireless_dev *wdev,
6333                             struct cfg80211_internal_bss *intbss)
6334 {
6335         struct cfg80211_bss *res = &intbss->pub;
6336         const struct cfg80211_bss_ies *ies;
6337         void *hdr;
6338         struct nlattr *bss;
6339
6340         ASSERT_WDEV_LOCK(wdev);
6341
6342         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6343                              NL80211_CMD_NEW_SCAN_RESULTS);
6344         if (!hdr)
6345                 return -1;
6346
6347         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6348
6349         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6350                 goto nla_put_failure;
6351         if (wdev->netdev &&
6352             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6353                 goto nla_put_failure;
6354         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6355                 goto nla_put_failure;
6356
6357         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6358         if (!bss)
6359                 goto nla_put_failure;
6360         if ((!is_zero_ether_addr(res->bssid) &&
6361              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6362                 goto nla_put_failure;
6363
6364         rcu_read_lock();
6365         /* indicate whether we have probe response data or not */
6366         if (rcu_access_pointer(res->proberesp_ies) &&
6367             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6368                 goto fail_unlock_rcu;
6369
6370         /* this pointer prefers to be pointed to probe response data
6371          * but is always valid
6372          */
6373         ies = rcu_dereference(res->ies);
6374         if (ies) {
6375                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6376                         goto fail_unlock_rcu;
6377                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6378                                         ies->len, ies->data))
6379                         goto fail_unlock_rcu;
6380         }
6381
6382         /* and this pointer is always (unless driver didn't know) beacon data */
6383         ies = rcu_dereference(res->beacon_ies);
6384         if (ies && ies->from_beacon) {
6385                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6386                         goto fail_unlock_rcu;
6387                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6388                                         ies->len, ies->data))
6389                         goto fail_unlock_rcu;
6390         }
6391         rcu_read_unlock();
6392
6393         if (res->beacon_interval &&
6394             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6395                 goto nla_put_failure;
6396         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6397             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6398             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6399             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6400                         jiffies_to_msecs(jiffies - intbss->ts)))
6401                 goto nla_put_failure;
6402
6403         switch (rdev->wiphy.signal_type) {
6404         case CFG80211_SIGNAL_TYPE_MBM:
6405                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6406                         goto nla_put_failure;
6407                 break;
6408         case CFG80211_SIGNAL_TYPE_UNSPEC:
6409                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6410                         goto nla_put_failure;
6411                 break;
6412         default:
6413                 break;
6414         }
6415
6416         switch (wdev->iftype) {
6417         case NL80211_IFTYPE_P2P_CLIENT:
6418         case NL80211_IFTYPE_STATION:
6419                 if (intbss == wdev->current_bss &&
6420                     nla_put_u32(msg, NL80211_BSS_STATUS,
6421                                 NL80211_BSS_STATUS_ASSOCIATED))
6422                         goto nla_put_failure;
6423                 break;
6424         case NL80211_IFTYPE_ADHOC:
6425                 if (intbss == wdev->current_bss &&
6426                     nla_put_u32(msg, NL80211_BSS_STATUS,
6427                                 NL80211_BSS_STATUS_IBSS_JOINED))
6428                         goto nla_put_failure;
6429                 break;
6430         default:
6431                 break;
6432         }
6433
6434         nla_nest_end(msg, bss);
6435
6436         return genlmsg_end(msg, hdr);
6437
6438  fail_unlock_rcu:
6439         rcu_read_unlock();
6440  nla_put_failure:
6441         genlmsg_cancel(msg, hdr);
6442         return -EMSGSIZE;
6443 }
6444
6445 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6446 {
6447         struct cfg80211_registered_device *rdev;
6448         struct cfg80211_internal_bss *scan;
6449         struct wireless_dev *wdev;
6450         int start = cb->args[2], idx = 0;
6451         int err;
6452
6453         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6454         if (err)
6455                 return err;
6456
6457         wdev_lock(wdev);
6458         spin_lock_bh(&rdev->bss_lock);
6459         cfg80211_bss_expire(rdev);
6460
6461         cb->seq = rdev->bss_generation;
6462
6463         list_for_each_entry(scan, &rdev->bss_list, list) {
6464                 if (++idx <= start)
6465                         continue;
6466                 if (nl80211_send_bss(skb, cb,
6467                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6468                                 rdev, wdev, scan) < 0) {
6469                         idx--;
6470                         break;
6471                 }
6472         }
6473
6474         spin_unlock_bh(&rdev->bss_lock);
6475         wdev_unlock(wdev);
6476
6477         cb->args[2] = idx;
6478         nl80211_finish_wdev_dump(rdev);
6479
6480         return skb->len;
6481 }
6482
6483 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6484                                 int flags, struct net_device *dev,
6485                                 struct survey_info *survey)
6486 {
6487         void *hdr;
6488         struct nlattr *infoattr;
6489
6490         hdr = nl80211hdr_put(msg, portid, seq, flags,
6491                              NL80211_CMD_NEW_SURVEY_RESULTS);
6492         if (!hdr)
6493                 return -ENOMEM;
6494
6495         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6496                 goto nla_put_failure;
6497
6498         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6499         if (!infoattr)
6500                 goto nla_put_failure;
6501
6502         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6503                         survey->channel->center_freq))
6504                 goto nla_put_failure;
6505
6506         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6507             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6508                 goto nla_put_failure;
6509         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6510             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6511                 goto nla_put_failure;
6512         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
6513             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
6514                         survey->channel_time))
6515                 goto nla_put_failure;
6516         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6517             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6518                         survey->channel_time_busy))
6519                 goto nla_put_failure;
6520         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6521             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6522                         survey->channel_time_ext_busy))
6523                 goto nla_put_failure;
6524         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6525             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6526                         survey->channel_time_rx))
6527                 goto nla_put_failure;
6528         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6529             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6530                         survey->channel_time_tx))
6531                 goto nla_put_failure;
6532
6533         nla_nest_end(msg, infoattr);
6534
6535         return genlmsg_end(msg, hdr);
6536
6537  nla_put_failure:
6538         genlmsg_cancel(msg, hdr);
6539         return -EMSGSIZE;
6540 }
6541
6542 static int nl80211_dump_survey(struct sk_buff *skb,
6543                         struct netlink_callback *cb)
6544 {
6545         struct survey_info survey;
6546         struct cfg80211_registered_device *rdev;
6547         struct wireless_dev *wdev;
6548         int survey_idx = cb->args[2];
6549         int res;
6550
6551         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6552         if (res)
6553                 return res;
6554
6555         if (!wdev->netdev) {
6556                 res = -EINVAL;
6557                 goto out_err;
6558         }
6559
6560         if (!rdev->ops->dump_survey) {
6561                 res = -EOPNOTSUPP;
6562                 goto out_err;
6563         }
6564
6565         while (1) {
6566                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6567                 if (res == -ENOENT)
6568                         break;
6569                 if (res)
6570                         goto out_err;
6571
6572                 /* Survey without a channel doesn't make sense */
6573                 if (!survey.channel) {
6574                         res = -EINVAL;
6575                         goto out;
6576                 }
6577
6578                 if (survey.channel->flags & IEEE80211_CHAN_DISABLED) {
6579                         survey_idx++;
6580                         continue;
6581                 }
6582
6583                 if (nl80211_send_survey(skb,
6584                                 NETLINK_CB(cb->skb).portid,
6585                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6586                                 wdev->netdev, &survey) < 0)
6587                         goto out;
6588                 survey_idx++;
6589         }
6590
6591  out:
6592         cb->args[2] = survey_idx;
6593         res = skb->len;
6594  out_err:
6595         nl80211_finish_wdev_dump(rdev);
6596         return res;
6597 }
6598
6599 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6600 {
6601         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6602                                   NL80211_WPA_VERSION_2));
6603 }
6604
6605 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6606 {
6607         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6608         struct net_device *dev = info->user_ptr[1];
6609         struct ieee80211_channel *chan;
6610         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6611         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6612         enum nl80211_auth_type auth_type;
6613         struct key_parse key;
6614         bool local_state_change;
6615
6616         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6617                 return -EINVAL;
6618
6619         if (!info->attrs[NL80211_ATTR_MAC])
6620                 return -EINVAL;
6621
6622         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6623                 return -EINVAL;
6624
6625         if (!info->attrs[NL80211_ATTR_SSID])
6626                 return -EINVAL;
6627
6628         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6629                 return -EINVAL;
6630
6631         err = nl80211_parse_key(info, &key);
6632         if (err)
6633                 return err;
6634
6635         if (key.idx >= 0) {
6636                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6637                         return -EINVAL;
6638                 if (!key.p.key || !key.p.key_len)
6639                         return -EINVAL;
6640                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6641                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6642                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6643                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6644                         return -EINVAL;
6645                 if (key.idx > 4)
6646                         return -EINVAL;
6647         } else {
6648                 key.p.key_len = 0;
6649                 key.p.key = NULL;
6650         }
6651
6652         if (key.idx >= 0) {
6653                 int i;
6654                 bool ok = false;
6655                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6656                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6657                                 ok = true;
6658                                 break;
6659                         }
6660                 }
6661                 if (!ok)
6662                         return -EINVAL;
6663         }
6664
6665         if (!rdev->ops->auth)
6666                 return -EOPNOTSUPP;
6667
6668         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6669             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6670                 return -EOPNOTSUPP;
6671
6672         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6673         chan = nl80211_get_valid_chan(&rdev->wiphy,
6674                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6675         if (!chan)
6676                 return -EINVAL;
6677
6678         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6679         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6680
6681         if (info->attrs[NL80211_ATTR_IE]) {
6682                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6683                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6684         }
6685
6686         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6687         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6688                 return -EINVAL;
6689
6690         if (auth_type == NL80211_AUTHTYPE_SAE &&
6691             !info->attrs[NL80211_ATTR_SAE_DATA])
6692                 return -EINVAL;
6693
6694         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6695                 if (auth_type != NL80211_AUTHTYPE_SAE)
6696                         return -EINVAL;
6697                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6698                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6699                 /* need to include at least Auth Transaction and Status Code */
6700                 if (sae_data_len < 4)
6701                         return -EINVAL;
6702         }
6703
6704         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6705
6706         /*
6707          * Since we no longer track auth state, ignore
6708          * requests to only change local state.
6709          */
6710         if (local_state_change)
6711                 return 0;
6712
6713         wdev_lock(dev->ieee80211_ptr);
6714         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6715                                  ssid, ssid_len, ie, ie_len,
6716                                  key.p.key, key.p.key_len, key.idx,
6717                                  sae_data, sae_data_len);
6718         wdev_unlock(dev->ieee80211_ptr);
6719         return err;
6720 }
6721
6722 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6723                                    struct genl_info *info,
6724                                    struct cfg80211_crypto_settings *settings,
6725                                    int cipher_limit)
6726 {
6727         memset(settings, 0, sizeof(*settings));
6728
6729         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6730
6731         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6732                 u16 proto;
6733                 proto = nla_get_u16(
6734                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6735                 settings->control_port_ethertype = cpu_to_be16(proto);
6736                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6737                     proto != ETH_P_PAE)
6738                         return -EINVAL;
6739                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6740                         settings->control_port_no_encrypt = true;
6741         } else
6742                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6743
6744         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6745                 void *data;
6746                 int len, i;
6747
6748                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6749                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6750                 settings->n_ciphers_pairwise = len / sizeof(u32);
6751
6752                 if (len % sizeof(u32))
6753                         return -EINVAL;
6754
6755                 if (settings->n_ciphers_pairwise > cipher_limit)
6756                         return -EINVAL;
6757
6758                 memcpy(settings->ciphers_pairwise, data, len);
6759
6760                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6761                         if (!cfg80211_supported_cipher_suite(
6762                                         &rdev->wiphy,
6763                                         settings->ciphers_pairwise[i]))
6764                                 return -EINVAL;
6765         }
6766
6767         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6768                 settings->cipher_group =
6769                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6770                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6771                                                      settings->cipher_group))
6772                         return -EINVAL;
6773         }
6774
6775         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6776                 settings->wpa_versions =
6777                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6778                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6779                         return -EINVAL;
6780         }
6781
6782         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6783                 void *data;
6784                 int len;
6785
6786                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6787                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6788                 settings->n_akm_suites = len / sizeof(u32);
6789
6790                 if (len % sizeof(u32))
6791                         return -EINVAL;
6792
6793                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6794                         return -EINVAL;
6795
6796                 memcpy(settings->akm_suites, data, len);
6797         }
6798
6799         return 0;
6800 }
6801
6802 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6803 {
6804         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6805         struct net_device *dev = info->user_ptr[1];
6806         struct ieee80211_channel *chan;
6807         struct cfg80211_assoc_request req = {};
6808         const u8 *bssid, *ssid;
6809         int err, ssid_len = 0;
6810
6811         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6812                 return -EINVAL;
6813
6814         if (!info->attrs[NL80211_ATTR_MAC] ||
6815             !info->attrs[NL80211_ATTR_SSID] ||
6816             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6817                 return -EINVAL;
6818
6819         if (!rdev->ops->assoc)
6820                 return -EOPNOTSUPP;
6821
6822         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6823             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6824                 return -EOPNOTSUPP;
6825
6826         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6827
6828         chan = nl80211_get_valid_chan(&rdev->wiphy,
6829                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6830         if (!chan)
6831                 return -EINVAL;
6832
6833         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6834         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6835
6836         if (info->attrs[NL80211_ATTR_IE]) {
6837                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6838                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6839         }
6840
6841         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6842                 enum nl80211_mfp mfp =
6843                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6844                 if (mfp == NL80211_MFP_REQUIRED)
6845                         req.use_mfp = true;
6846                 else if (mfp != NL80211_MFP_NO)
6847                         return -EINVAL;
6848         }
6849
6850         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6851                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6852
6853         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6854                 req.flags |= ASSOC_REQ_DISABLE_HT;
6855
6856         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6857                 memcpy(&req.ht_capa_mask,
6858                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6859                        sizeof(req.ht_capa_mask));
6860
6861         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6862                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6863                         return -EINVAL;
6864                 memcpy(&req.ht_capa,
6865                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6866                        sizeof(req.ht_capa));
6867         }
6868
6869         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6870                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6871
6872         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6873                 memcpy(&req.vht_capa_mask,
6874                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6875                        sizeof(req.vht_capa_mask));
6876
6877         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6878                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6879                         return -EINVAL;
6880                 memcpy(&req.vht_capa,
6881                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6882                        sizeof(req.vht_capa));
6883         }
6884
6885         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
6886                 if (!(rdev->wiphy.features &
6887                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
6888                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
6889                         return -EINVAL;
6890                 req.flags |= ASSOC_REQ_USE_RRM;
6891         }
6892
6893         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6894         if (!err) {
6895                 wdev_lock(dev->ieee80211_ptr);
6896                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6897                                           ssid, ssid_len, &req);
6898                 wdev_unlock(dev->ieee80211_ptr);
6899         }
6900
6901         return err;
6902 }
6903
6904 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6905 {
6906         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6907         struct net_device *dev = info->user_ptr[1];
6908         const u8 *ie = NULL, *bssid;
6909         int ie_len = 0, err;
6910         u16 reason_code;
6911         bool local_state_change;
6912
6913         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6914                 return -EINVAL;
6915
6916         if (!info->attrs[NL80211_ATTR_MAC])
6917                 return -EINVAL;
6918
6919         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6920                 return -EINVAL;
6921
6922         if (!rdev->ops->deauth)
6923                 return -EOPNOTSUPP;
6924
6925         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6926             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6927                 return -EOPNOTSUPP;
6928
6929         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6930
6931         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6932         if (reason_code == 0) {
6933                 /* Reason Code 0 is reserved */
6934                 return -EINVAL;
6935         }
6936
6937         if (info->attrs[NL80211_ATTR_IE]) {
6938                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6939                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6940         }
6941
6942         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6943
6944         wdev_lock(dev->ieee80211_ptr);
6945         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6946                                    local_state_change);
6947         wdev_unlock(dev->ieee80211_ptr);
6948         return err;
6949 }
6950
6951 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6952 {
6953         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6954         struct net_device *dev = info->user_ptr[1];
6955         const u8 *ie = NULL, *bssid;
6956         int ie_len = 0, err;
6957         u16 reason_code;
6958         bool local_state_change;
6959
6960         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6961                 return -EINVAL;
6962
6963         if (!info->attrs[NL80211_ATTR_MAC])
6964                 return -EINVAL;
6965
6966         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6967                 return -EINVAL;
6968
6969         if (!rdev->ops->disassoc)
6970                 return -EOPNOTSUPP;
6971
6972         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6973             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6974                 return -EOPNOTSUPP;
6975
6976         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6977
6978         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6979         if (reason_code == 0) {
6980                 /* Reason Code 0 is reserved */
6981                 return -EINVAL;
6982         }
6983
6984         if (info->attrs[NL80211_ATTR_IE]) {
6985                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6986                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6987         }
6988
6989         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6990
6991         wdev_lock(dev->ieee80211_ptr);
6992         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6993                                      local_state_change);
6994         wdev_unlock(dev->ieee80211_ptr);
6995         return err;
6996 }
6997
6998 static bool
6999 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7000                          int mcast_rate[IEEE80211_NUM_BANDS],
7001                          int rateval)
7002 {
7003         struct wiphy *wiphy = &rdev->wiphy;
7004         bool found = false;
7005         int band, i;
7006
7007         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7008                 struct ieee80211_supported_band *sband;
7009
7010                 sband = wiphy->bands[band];
7011                 if (!sband)
7012                         continue;
7013
7014                 for (i = 0; i < sband->n_bitrates; i++) {
7015                         if (sband->bitrates[i].bitrate == rateval) {
7016                                 mcast_rate[band] = i + 1;
7017                                 found = true;
7018                                 break;
7019                         }
7020                 }
7021         }
7022
7023         return found;
7024 }
7025
7026 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7027 {
7028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7029         struct net_device *dev = info->user_ptr[1];
7030         struct cfg80211_ibss_params ibss;
7031         struct wiphy *wiphy;
7032         struct cfg80211_cached_keys *connkeys = NULL;
7033         int err;
7034
7035         memset(&ibss, 0, sizeof(ibss));
7036
7037         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7038                 return -EINVAL;
7039
7040         if (!info->attrs[NL80211_ATTR_SSID] ||
7041             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7042                 return -EINVAL;
7043
7044         ibss.beacon_interval = 100;
7045
7046         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7047                 ibss.beacon_interval =
7048                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7049                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7050                         return -EINVAL;
7051         }
7052
7053         if (!rdev->ops->join_ibss)
7054                 return -EOPNOTSUPP;
7055
7056         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7057                 return -EOPNOTSUPP;
7058
7059         wiphy = &rdev->wiphy;
7060
7061         if (info->attrs[NL80211_ATTR_MAC]) {
7062                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7063
7064                 if (!is_valid_ether_addr(ibss.bssid))
7065                         return -EINVAL;
7066         }
7067         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7068         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7069
7070         if (info->attrs[NL80211_ATTR_IE]) {
7071                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7072                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7073         }
7074
7075         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7076         if (err)
7077                 return err;
7078
7079         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7080                                      NL80211_IFTYPE_ADHOC))
7081                 return -EINVAL;
7082
7083         switch (ibss.chandef.width) {
7084         case NL80211_CHAN_WIDTH_5:
7085         case NL80211_CHAN_WIDTH_10:
7086         case NL80211_CHAN_WIDTH_20_NOHT:
7087                 break;
7088         case NL80211_CHAN_WIDTH_20:
7089         case NL80211_CHAN_WIDTH_40:
7090                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
7091                         break;
7092         default:
7093                 return -EINVAL;
7094         }
7095
7096         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7097         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7098
7099         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7100                 u8 *rates =
7101                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7102                 int n_rates =
7103                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7104                 struct ieee80211_supported_band *sband =
7105                         wiphy->bands[ibss.chandef.chan->band];
7106
7107                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7108                                              &ibss.basic_rates);
7109                 if (err)
7110                         return err;
7111         }
7112
7113         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7114                 memcpy(&ibss.ht_capa_mask,
7115                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7116                        sizeof(ibss.ht_capa_mask));
7117
7118         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7119                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7120                         return -EINVAL;
7121                 memcpy(&ibss.ht_capa,
7122                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7123                        sizeof(ibss.ht_capa));
7124         }
7125
7126         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7127             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7128                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7129                 return -EINVAL;
7130
7131         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7132                 bool no_ht = false;
7133
7134                 connkeys = nl80211_parse_connkeys(rdev,
7135                                           info->attrs[NL80211_ATTR_KEYS],
7136                                           &no_ht);
7137                 if (IS_ERR(connkeys))
7138                         return PTR_ERR(connkeys);
7139
7140                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7141                     no_ht) {
7142                         kfree(connkeys);
7143                         return -EINVAL;
7144                 }
7145         }
7146
7147         ibss.control_port =
7148                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7149
7150         ibss.userspace_handles_dfs =
7151                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7152
7153         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7154         if (err)
7155                 kzfree(connkeys);
7156         return err;
7157 }
7158
7159 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7160 {
7161         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7162         struct net_device *dev = info->user_ptr[1];
7163
7164         if (!rdev->ops->leave_ibss)
7165                 return -EOPNOTSUPP;
7166
7167         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7168                 return -EOPNOTSUPP;
7169
7170         return cfg80211_leave_ibss(rdev, dev, false);
7171 }
7172
7173 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7174 {
7175         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7176         struct net_device *dev = info->user_ptr[1];
7177         int mcast_rate[IEEE80211_NUM_BANDS];
7178         u32 nla_rate;
7179         int err;
7180
7181         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7182             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
7183                 return -EOPNOTSUPP;
7184
7185         if (!rdev->ops->set_mcast_rate)
7186                 return -EOPNOTSUPP;
7187
7188         memset(mcast_rate, 0, sizeof(mcast_rate));
7189
7190         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7191                 return -EINVAL;
7192
7193         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7194         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7195                 return -EINVAL;
7196
7197         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
7198
7199         return err;
7200 }
7201
7202 static struct sk_buff *
7203 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7204                             int approxlen, u32 portid, u32 seq,
7205                             enum nl80211_commands cmd,
7206                             enum nl80211_attrs attr,
7207                             const struct nl80211_vendor_cmd_info *info,
7208                             gfp_t gfp)
7209 {
7210         struct sk_buff *skb;
7211         void *hdr;
7212         struct nlattr *data;
7213
7214         skb = nlmsg_new(approxlen + 100, gfp);
7215         if (!skb)
7216                 return NULL;
7217
7218         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7219         if (!hdr) {
7220                 kfree_skb(skb);
7221                 return NULL;
7222         }
7223
7224         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7225                 goto nla_put_failure;
7226
7227         if (info) {
7228                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7229                                 info->vendor_id))
7230                         goto nla_put_failure;
7231                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7232                                 info->subcmd))
7233                         goto nla_put_failure;
7234         }
7235
7236         data = nla_nest_start(skb, attr);
7237
7238         ((void **)skb->cb)[0] = rdev;
7239         ((void **)skb->cb)[1] = hdr;
7240         ((void **)skb->cb)[2] = data;
7241
7242         return skb;
7243
7244  nla_put_failure:
7245         kfree_skb(skb);
7246         return NULL;
7247 }
7248
7249 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7250                                            enum nl80211_commands cmd,
7251                                            enum nl80211_attrs attr,
7252                                            int vendor_event_idx,
7253                                            int approxlen, gfp_t gfp)
7254 {
7255         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7256         const struct nl80211_vendor_cmd_info *info;
7257
7258         switch (cmd) {
7259         case NL80211_CMD_TESTMODE:
7260                 if (WARN_ON(vendor_event_idx != -1))
7261                         return NULL;
7262                 info = NULL;
7263                 break;
7264         case NL80211_CMD_VENDOR:
7265                 if (WARN_ON(vendor_event_idx < 0 ||
7266                             vendor_event_idx >= wiphy->n_vendor_events))
7267                         return NULL;
7268                 info = &wiphy->vendor_events[vendor_event_idx];
7269                 break;
7270         default:
7271                 WARN_ON(1);
7272                 return NULL;
7273         }
7274
7275         return __cfg80211_alloc_vendor_skb(rdev, approxlen, 0, 0,
7276                                            cmd, attr, info, gfp);
7277 }
7278 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7279
7280 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7281 {
7282         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7283         void *hdr = ((void **)skb->cb)[1];
7284         struct nlattr *data = ((void **)skb->cb)[2];
7285         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7286
7287         /* clear CB data for netlink core to own from now on */
7288         memset(skb->cb, 0, sizeof(skb->cb));
7289
7290         nla_nest_end(skb, data);
7291         genlmsg_end(skb, hdr);
7292
7293         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7294                 mcgrp = NL80211_MCGRP_VENDOR;
7295
7296         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7297                                 mcgrp, gfp);
7298 }
7299 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7300
7301 #ifdef CONFIG_NL80211_TESTMODE
7302 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7303 {
7304         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7305         struct wireless_dev *wdev =
7306                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7307         int err;
7308
7309         if (!rdev->ops->testmode_cmd)
7310                 return -EOPNOTSUPP;
7311
7312         if (IS_ERR(wdev)) {
7313                 err = PTR_ERR(wdev);
7314                 if (err != -EINVAL)
7315                         return err;
7316                 wdev = NULL;
7317         } else if (wdev->wiphy != &rdev->wiphy) {
7318                 return -EINVAL;
7319         }
7320
7321         if (!info->attrs[NL80211_ATTR_TESTDATA])
7322                 return -EINVAL;
7323
7324         rdev->cur_cmd_info = info;
7325         err = rdev_testmode_cmd(rdev, wdev,
7326                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7327                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7328         rdev->cur_cmd_info = NULL;
7329
7330         return err;
7331 }
7332
7333 static int nl80211_testmode_dump(struct sk_buff *skb,
7334                                  struct netlink_callback *cb)
7335 {
7336         struct cfg80211_registered_device *rdev;
7337         int err;
7338         long phy_idx;
7339         void *data = NULL;
7340         int data_len = 0;
7341
7342         rtnl_lock();
7343
7344         if (cb->args[0]) {
7345                 /*
7346                  * 0 is a valid index, but not valid for args[0],
7347                  * so we need to offset by 1.
7348                  */
7349                 phy_idx = cb->args[0] - 1;
7350         } else {
7351                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7352                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7353                                   nl80211_policy);
7354                 if (err)
7355                         goto out_err;
7356
7357                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7358                                                   nl80211_fam.attrbuf);
7359                 if (IS_ERR(rdev)) {
7360                         err = PTR_ERR(rdev);
7361                         goto out_err;
7362                 }
7363                 phy_idx = rdev->wiphy_idx;
7364                 rdev = NULL;
7365
7366                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7367                         cb->args[1] =
7368                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7369         }
7370
7371         if (cb->args[1]) {
7372                 data = nla_data((void *)cb->args[1]);
7373                 data_len = nla_len((void *)cb->args[1]);
7374         }
7375
7376         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7377         if (!rdev) {
7378                 err = -ENOENT;
7379                 goto out_err;
7380         }
7381
7382         if (!rdev->ops->testmode_dump) {
7383                 err = -EOPNOTSUPP;
7384                 goto out_err;
7385         }
7386
7387         while (1) {
7388                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7389                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7390                                            NL80211_CMD_TESTMODE);
7391                 struct nlattr *tmdata;
7392
7393                 if (!hdr)
7394                         break;
7395
7396                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7397                         genlmsg_cancel(skb, hdr);
7398                         break;
7399                 }
7400
7401                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7402                 if (!tmdata) {
7403                         genlmsg_cancel(skb, hdr);
7404                         break;
7405                 }
7406                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7407                 nla_nest_end(skb, tmdata);
7408
7409                 if (err == -ENOBUFS || err == -ENOENT) {
7410                         genlmsg_cancel(skb, hdr);
7411                         break;
7412                 } else if (err) {
7413                         genlmsg_cancel(skb, hdr);
7414                         goto out_err;
7415                 }
7416
7417                 genlmsg_end(skb, hdr);
7418         }
7419
7420         err = skb->len;
7421         /* see above */
7422         cb->args[0] = phy_idx + 1;
7423  out_err:
7424         rtnl_unlock();
7425         return err;
7426 }
7427 #endif
7428
7429 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7430 {
7431         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7432         struct net_device *dev = info->user_ptr[1];
7433         struct cfg80211_connect_params connect;
7434         struct wiphy *wiphy;
7435         struct cfg80211_cached_keys *connkeys = NULL;
7436         int err;
7437
7438         memset(&connect, 0, sizeof(connect));
7439
7440         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7441                 return -EINVAL;
7442
7443         if (!info->attrs[NL80211_ATTR_SSID] ||
7444             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7445                 return -EINVAL;
7446
7447         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7448                 connect.auth_type =
7449                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7450                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7451                                              NL80211_CMD_CONNECT))
7452                         return -EINVAL;
7453         } else
7454                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7455
7456         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7457
7458         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7459                                       NL80211_MAX_NR_CIPHER_SUITES);
7460         if (err)
7461                 return err;
7462
7463         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7464             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7465                 return -EOPNOTSUPP;
7466
7467         wiphy = &rdev->wiphy;
7468
7469         connect.bg_scan_period = -1;
7470         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7471                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7472                 connect.bg_scan_period =
7473                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7474         }
7475
7476         if (info->attrs[NL80211_ATTR_MAC])
7477                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7478         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7479                 connect.bssid_hint =
7480                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7481         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7482         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7483
7484         if (info->attrs[NL80211_ATTR_IE]) {
7485                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7486                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7487         }
7488
7489         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7490                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7491                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7492                     connect.mfp != NL80211_MFP_NO)
7493                         return -EINVAL;
7494         } else {
7495                 connect.mfp = NL80211_MFP_NO;
7496         }
7497
7498         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7499                 connect.channel = nl80211_get_valid_chan(
7500                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7501                 if (!connect.channel)
7502                         return -EINVAL;
7503         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7504                 connect.channel_hint = nl80211_get_valid_chan(
7505                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7506                 if (!connect.channel_hint)
7507                         return -EINVAL;
7508         }
7509
7510         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7511                 connkeys = nl80211_parse_connkeys(rdev,
7512                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7513                 if (IS_ERR(connkeys))
7514                         return PTR_ERR(connkeys);
7515         }
7516
7517         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7518                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7519
7520         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7521                 memcpy(&connect.ht_capa_mask,
7522                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7523                        sizeof(connect.ht_capa_mask));
7524
7525         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7526                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7527                         kzfree(connkeys);
7528                         return -EINVAL;
7529                 }
7530                 memcpy(&connect.ht_capa,
7531                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7532                        sizeof(connect.ht_capa));
7533         }
7534
7535         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7536                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7537
7538         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7539                 memcpy(&connect.vht_capa_mask,
7540                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7541                        sizeof(connect.vht_capa_mask));
7542
7543         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7544                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7545                         kzfree(connkeys);
7546                         return -EINVAL;
7547                 }
7548                 memcpy(&connect.vht_capa,
7549                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7550                        sizeof(connect.vht_capa));
7551         }
7552
7553         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7554                 if (!(rdev->wiphy.features &
7555                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7556                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7557                         return -EINVAL;
7558                 connect.flags |= ASSOC_REQ_USE_RRM;
7559         }
7560
7561         wdev_lock(dev->ieee80211_ptr);
7562         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7563         wdev_unlock(dev->ieee80211_ptr);
7564         if (err)
7565                 kzfree(connkeys);
7566         return err;
7567 }
7568
7569 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7570 {
7571         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7572         struct net_device *dev = info->user_ptr[1];
7573         u16 reason;
7574         int ret;
7575
7576         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7577                 reason = WLAN_REASON_DEAUTH_LEAVING;
7578         else
7579                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7580
7581         if (reason == 0)
7582                 return -EINVAL;
7583
7584         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7585             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7586                 return -EOPNOTSUPP;
7587
7588         wdev_lock(dev->ieee80211_ptr);
7589         ret = cfg80211_disconnect(rdev, dev, reason, true);
7590         wdev_unlock(dev->ieee80211_ptr);
7591         return ret;
7592 }
7593
7594 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7595 {
7596         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7597         struct net *net;
7598         int err;
7599         u32 pid;
7600
7601         if (!info->attrs[NL80211_ATTR_PID])
7602                 return -EINVAL;
7603
7604         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7605
7606         net = get_net_ns_by_pid(pid);
7607         if (IS_ERR(net))
7608                 return PTR_ERR(net);
7609
7610         err = 0;
7611
7612         /* check if anything to do */
7613         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7614                 err = cfg80211_switch_netns(rdev, net);
7615
7616         put_net(net);
7617         return err;
7618 }
7619
7620 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7621 {
7622         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7623         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7624                         struct cfg80211_pmksa *pmksa) = NULL;
7625         struct net_device *dev = info->user_ptr[1];
7626         struct cfg80211_pmksa pmksa;
7627
7628         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7629
7630         if (!info->attrs[NL80211_ATTR_MAC])
7631                 return -EINVAL;
7632
7633         if (!info->attrs[NL80211_ATTR_PMKID])
7634                 return -EINVAL;
7635
7636         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7637         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7638
7639         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7640             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7641                 return -EOPNOTSUPP;
7642
7643         switch (info->genlhdr->cmd) {
7644         case NL80211_CMD_SET_PMKSA:
7645                 rdev_ops = rdev->ops->set_pmksa;
7646                 break;
7647         case NL80211_CMD_DEL_PMKSA:
7648                 rdev_ops = rdev->ops->del_pmksa;
7649                 break;
7650         default:
7651                 WARN_ON(1);
7652                 break;
7653         }
7654
7655         if (!rdev_ops)
7656                 return -EOPNOTSUPP;
7657
7658         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7659 }
7660
7661 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7662 {
7663         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7664         struct net_device *dev = info->user_ptr[1];
7665
7666         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7667             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7668                 return -EOPNOTSUPP;
7669
7670         if (!rdev->ops->flush_pmksa)
7671                 return -EOPNOTSUPP;
7672
7673         return rdev_flush_pmksa(rdev, dev);
7674 }
7675
7676 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7677 {
7678         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7679         struct net_device *dev = info->user_ptr[1];
7680         u8 action_code, dialog_token;
7681         u32 peer_capability = 0;
7682         u16 status_code;
7683         u8 *peer;
7684         bool initiator;
7685
7686         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7687             !rdev->ops->tdls_mgmt)
7688                 return -EOPNOTSUPP;
7689
7690         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7691             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7692             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7693             !info->attrs[NL80211_ATTR_IE] ||
7694             !info->attrs[NL80211_ATTR_MAC])
7695                 return -EINVAL;
7696
7697         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7698         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7699         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7700         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7701         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
7702         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
7703                 peer_capability =
7704                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
7705
7706         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7707                               dialog_token, status_code, peer_capability,
7708                               initiator,
7709                               nla_data(info->attrs[NL80211_ATTR_IE]),
7710                               nla_len(info->attrs[NL80211_ATTR_IE]));
7711 }
7712
7713 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
7714 {
7715         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7716         struct net_device *dev = info->user_ptr[1];
7717         enum nl80211_tdls_operation operation;
7718         u8 *peer;
7719
7720         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7721             !rdev->ops->tdls_oper)
7722                 return -EOPNOTSUPP;
7723
7724         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7725             !info->attrs[NL80211_ATTR_MAC])
7726                 return -EINVAL;
7727
7728         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7729         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7730
7731         return rdev_tdls_oper(rdev, dev, peer, operation);
7732 }
7733
7734 static int nl80211_remain_on_channel(struct sk_buff *skb,
7735                                      struct genl_info *info)
7736 {
7737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7738         struct wireless_dev *wdev = info->user_ptr[1];
7739         struct cfg80211_chan_def chandef;
7740         struct sk_buff *msg;
7741         void *hdr;
7742         u64 cookie;
7743         u32 duration;
7744         int err;
7745
7746         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7747             !info->attrs[NL80211_ATTR_DURATION])
7748                 return -EINVAL;
7749
7750         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7751
7752         if (!rdev->ops->remain_on_channel ||
7753             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7754                 return -EOPNOTSUPP;
7755
7756         /*
7757          * We should be on that channel for at least a minimum amount of
7758          * time (10ms) but no longer than the driver supports.
7759          */
7760         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7761             duration > rdev->wiphy.max_remain_on_channel_duration)
7762                 return -EINVAL;
7763
7764         err = nl80211_parse_chandef(rdev, info, &chandef);
7765         if (err)
7766                 return err;
7767
7768         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7769         if (!msg)
7770                 return -ENOMEM;
7771
7772         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7773                              NL80211_CMD_REMAIN_ON_CHANNEL);
7774         if (!hdr) {
7775                 err = -ENOBUFS;
7776                 goto free_msg;
7777         }
7778
7779         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7780                                      duration, &cookie);
7781
7782         if (err)
7783                 goto free_msg;
7784
7785         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7786                 goto nla_put_failure;
7787
7788         genlmsg_end(msg, hdr);
7789
7790         return genlmsg_reply(msg, info);
7791
7792  nla_put_failure:
7793         err = -ENOBUFS;
7794  free_msg:
7795         nlmsg_free(msg);
7796         return err;
7797 }
7798
7799 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7800                                             struct genl_info *info)
7801 {
7802         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7803         struct wireless_dev *wdev = info->user_ptr[1];
7804         u64 cookie;
7805
7806         if (!info->attrs[NL80211_ATTR_COOKIE])
7807                 return -EINVAL;
7808
7809         if (!rdev->ops->cancel_remain_on_channel)
7810                 return -EOPNOTSUPP;
7811
7812         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7813
7814         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7815 }
7816
7817 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7818                            u8 *rates, u8 rates_len)
7819 {
7820         u8 i;
7821         u32 mask = 0;
7822
7823         for (i = 0; i < rates_len; i++) {
7824                 int rate = (rates[i] & 0x7f) * 5;
7825                 int ridx;
7826                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7827                         struct ieee80211_rate *srate =
7828                                 &sband->bitrates[ridx];
7829                         if (rate == srate->bitrate) {
7830                                 mask |= 1 << ridx;
7831                                 break;
7832                         }
7833                 }
7834                 if (ridx == sband->n_bitrates)
7835                         return 0; /* rate not found */
7836         }
7837
7838         return mask;
7839 }
7840
7841 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7842                                u8 *rates, u8 rates_len,
7843                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7844 {
7845         u8 i;
7846
7847         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7848
7849         for (i = 0; i < rates_len; i++) {
7850                 int ridx, rbit;
7851
7852                 ridx = rates[i] / 8;
7853                 rbit = BIT(rates[i] % 8);
7854
7855                 /* check validity */
7856                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7857                         return false;
7858
7859                 /* check availability */
7860                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7861                         mcs[ridx] |= rbit;
7862                 else
7863                         return false;
7864         }
7865
7866         return true;
7867 }
7868
7869 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
7870 {
7871         u16 mcs_mask = 0;
7872
7873         switch (vht_mcs_map) {
7874         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
7875                 break;
7876         case IEEE80211_VHT_MCS_SUPPORT_0_7:
7877                 mcs_mask = 0x00FF;
7878                 break;
7879         case IEEE80211_VHT_MCS_SUPPORT_0_8:
7880                 mcs_mask = 0x01FF;
7881                 break;
7882         case IEEE80211_VHT_MCS_SUPPORT_0_9:
7883                 mcs_mask = 0x03FF;
7884                 break;
7885         default:
7886                 break;
7887         }
7888
7889         return mcs_mask;
7890 }
7891
7892 static void vht_build_mcs_mask(u16 vht_mcs_map,
7893                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
7894 {
7895         u8 nss;
7896
7897         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
7898                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
7899                 vht_mcs_map >>= 2;
7900         }
7901 }
7902
7903 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
7904                              struct nl80211_txrate_vht *txrate,
7905                              u16 mcs[NL80211_VHT_NSS_MAX])
7906 {
7907         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7908         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
7909         u8 i;
7910
7911         if (!sband->vht_cap.vht_supported)
7912                 return false;
7913
7914         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
7915
7916         /* Build vht_mcs_mask from VHT capabilities */
7917         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
7918
7919         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
7920                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
7921                         mcs[i] = txrate->mcs[i];
7922                 else
7923                         return false;
7924         }
7925
7926         return true;
7927 }
7928
7929 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7930         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7931                                     .len = NL80211_MAX_SUPP_RATES },
7932         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
7933                                 .len = NL80211_MAX_SUPP_HT_RATES },
7934         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
7935         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
7936 };
7937
7938 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7939                                        struct genl_info *info)
7940 {
7941         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7942         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7943         struct cfg80211_bitrate_mask mask;
7944         int rem, i;
7945         struct net_device *dev = info->user_ptr[1];
7946         struct nlattr *tx_rates;
7947         struct ieee80211_supported_band *sband;
7948         u16 vht_tx_mcs_map;
7949
7950         if (!rdev->ops->set_bitrate_mask)
7951                 return -EOPNOTSUPP;
7952
7953         memset(&mask, 0, sizeof(mask));
7954         /* Default to all rates enabled */
7955         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7956                 sband = rdev->wiphy.bands[i];
7957
7958                 if (!sband)
7959                         continue;
7960
7961                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
7962                 memcpy(mask.control[i].ht_mcs,
7963                        sband->ht_cap.mcs.rx_mask,
7964                        sizeof(mask.control[i].ht_mcs));
7965
7966                 if (!sband->vht_cap.vht_supported)
7967                         continue;
7968
7969                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
7970                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
7971         }
7972
7973         /* if no rates are given set it back to the defaults */
7974         if (!info->attrs[NL80211_ATTR_TX_RATES])
7975                 goto out;
7976
7977         /*
7978          * The nested attribute uses enum nl80211_band as the index. This maps
7979          * directly to the enum ieee80211_band values used in cfg80211.
7980          */
7981         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7982         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
7983                 enum ieee80211_band band = nla_type(tx_rates);
7984                 int err;
7985
7986                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7987                         return -EINVAL;
7988                 sband = rdev->wiphy.bands[band];
7989                 if (sband == NULL)
7990                         return -EINVAL;
7991                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7992                                 nla_len(tx_rates), nl80211_txattr_policy);
7993                 if (err)
7994                         return err;
7995                 if (tb[NL80211_TXRATE_LEGACY]) {
7996                         mask.control[band].legacy = rateset_to_mask(
7997                                 sband,
7998                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7999                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8000                         if ((mask.control[band].legacy == 0) &&
8001                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8002                                 return -EINVAL;
8003                 }
8004                 if (tb[NL80211_TXRATE_HT]) {
8005                         if (!ht_rateset_to_mask(
8006                                         sband,
8007                                         nla_data(tb[NL80211_TXRATE_HT]),
8008                                         nla_len(tb[NL80211_TXRATE_HT]),
8009                                         mask.control[band].ht_mcs))
8010                                 return -EINVAL;
8011                 }
8012                 if (tb[NL80211_TXRATE_VHT]) {
8013                         if (!vht_set_mcs_mask(
8014                                         sband,
8015                                         nla_data(tb[NL80211_TXRATE_VHT]),
8016                                         mask.control[band].vht_mcs))
8017                                 return -EINVAL;
8018                 }
8019                 if (tb[NL80211_TXRATE_GI]) {
8020                         mask.control[band].gi =
8021                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8022                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8023                                 return -EINVAL;
8024                 }
8025
8026                 if (mask.control[band].legacy == 0) {
8027                         /* don't allow empty legacy rates if HT or VHT
8028                          * are not even supported.
8029                          */
8030                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8031                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8032                                 return -EINVAL;
8033
8034                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8035                                 if (mask.control[band].ht_mcs[i])
8036                                         goto out;
8037
8038                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8039                                 if (mask.control[band].vht_mcs[i])
8040                                         goto out;
8041
8042                         /* legacy and mcs rates may not be both empty */
8043                         return -EINVAL;
8044                 }
8045         }
8046
8047 out:
8048         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8049 }
8050
8051 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8052 {
8053         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8054         struct wireless_dev *wdev = info->user_ptr[1];
8055         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8056
8057         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8058                 return -EINVAL;
8059
8060         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8061                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8062
8063         switch (wdev->iftype) {
8064         case NL80211_IFTYPE_STATION:
8065         case NL80211_IFTYPE_ADHOC:
8066         case NL80211_IFTYPE_P2P_CLIENT:
8067         case NL80211_IFTYPE_AP:
8068         case NL80211_IFTYPE_AP_VLAN:
8069         case NL80211_IFTYPE_MESH_POINT:
8070         case NL80211_IFTYPE_P2P_GO:
8071         case NL80211_IFTYPE_P2P_DEVICE:
8072                 break;
8073         default:
8074                 return -EOPNOTSUPP;
8075         }
8076
8077         /* not much point in registering if we can't reply */
8078         if (!rdev->ops->mgmt_tx)
8079                 return -EOPNOTSUPP;
8080
8081         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8082                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8083                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8084 }
8085
8086 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8087 {
8088         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8089         struct wireless_dev *wdev = info->user_ptr[1];
8090         struct cfg80211_chan_def chandef;
8091         int err;
8092         void *hdr = NULL;
8093         u64 cookie;
8094         struct sk_buff *msg = NULL;
8095         struct cfg80211_mgmt_tx_params params = {
8096                 .dont_wait_for_ack =
8097                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8098         };
8099
8100         if (!info->attrs[NL80211_ATTR_FRAME])
8101                 return -EINVAL;
8102
8103         if (!rdev->ops->mgmt_tx)
8104                 return -EOPNOTSUPP;
8105
8106         switch (wdev->iftype) {
8107         case NL80211_IFTYPE_P2P_DEVICE:
8108                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8109                         return -EINVAL;
8110         case NL80211_IFTYPE_STATION:
8111         case NL80211_IFTYPE_ADHOC:
8112         case NL80211_IFTYPE_P2P_CLIENT:
8113         case NL80211_IFTYPE_AP:
8114         case NL80211_IFTYPE_AP_VLAN:
8115         case NL80211_IFTYPE_MESH_POINT:
8116         case NL80211_IFTYPE_P2P_GO:
8117                 break;
8118         default:
8119                 return -EOPNOTSUPP;
8120         }
8121
8122         if (info->attrs[NL80211_ATTR_DURATION]) {
8123                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8124                         return -EINVAL;
8125                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8126
8127                 /*
8128                  * We should wait on the channel for at least a minimum amount
8129                  * of time (10ms) but no longer than the driver supports.
8130                  */
8131                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8132                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8133                         return -EINVAL;
8134
8135         }
8136
8137         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8138
8139         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8140                 return -EINVAL;
8141
8142         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8143
8144         /* get the channel if any has been specified, otherwise pass NULL to
8145          * the driver. The latter will use the current one
8146          */
8147         chandef.chan = NULL;
8148         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8149                 err = nl80211_parse_chandef(rdev, info, &chandef);
8150                 if (err)
8151                         return err;
8152         }
8153
8154         if (!chandef.chan && params.offchan)
8155                 return -EINVAL;
8156
8157         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8158         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8159
8160         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8161                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8162                 int i;
8163
8164                 if (len % sizeof(u16))
8165                         return -EINVAL;
8166
8167                 params.n_csa_offsets = len / sizeof(u16);
8168                 params.csa_offsets =
8169                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8170
8171                 /* check that all the offsets fit the frame */
8172                 for (i = 0; i < params.n_csa_offsets; i++) {
8173                         if (params.csa_offsets[i] >= params.len)
8174                                 return -EINVAL;
8175                 }
8176         }
8177
8178         if (!params.dont_wait_for_ack) {
8179                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8180                 if (!msg)
8181                         return -ENOMEM;
8182
8183                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8184                                      NL80211_CMD_FRAME);
8185                 if (!hdr) {
8186                         err = -ENOBUFS;
8187                         goto free_msg;
8188                 }
8189         }
8190
8191         params.chan = chandef.chan;
8192         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8193         if (err)
8194                 goto free_msg;
8195
8196         if (msg) {
8197                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8198                         goto nla_put_failure;
8199
8200                 genlmsg_end(msg, hdr);
8201                 return genlmsg_reply(msg, info);
8202         }
8203
8204         return 0;
8205
8206  nla_put_failure:
8207         err = -ENOBUFS;
8208  free_msg:
8209         nlmsg_free(msg);
8210         return err;
8211 }
8212
8213 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8214 {
8215         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8216         struct wireless_dev *wdev = info->user_ptr[1];
8217         u64 cookie;
8218
8219         if (!info->attrs[NL80211_ATTR_COOKIE])
8220                 return -EINVAL;
8221
8222         if (!rdev->ops->mgmt_tx_cancel_wait)
8223                 return -EOPNOTSUPP;
8224
8225         switch (wdev->iftype) {
8226         case NL80211_IFTYPE_STATION:
8227         case NL80211_IFTYPE_ADHOC:
8228         case NL80211_IFTYPE_P2P_CLIENT:
8229         case NL80211_IFTYPE_AP:
8230         case NL80211_IFTYPE_AP_VLAN:
8231         case NL80211_IFTYPE_P2P_GO:
8232         case NL80211_IFTYPE_P2P_DEVICE:
8233                 break;
8234         default:
8235                 return -EOPNOTSUPP;
8236         }
8237
8238         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8239
8240         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8241 }
8242
8243 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8244 {
8245         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8246         struct wireless_dev *wdev;
8247         struct net_device *dev = info->user_ptr[1];
8248         u8 ps_state;
8249         bool state;
8250         int err;
8251
8252         if (!info->attrs[NL80211_ATTR_PS_STATE])
8253                 return -EINVAL;
8254
8255         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8256
8257         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8258                 return -EINVAL;
8259
8260         wdev = dev->ieee80211_ptr;
8261
8262         if (!rdev->ops->set_power_mgmt)
8263                 return -EOPNOTSUPP;
8264
8265         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8266
8267         if (state == wdev->ps)
8268                 return 0;
8269
8270         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8271         if (!err)
8272                 wdev->ps = state;
8273         return err;
8274 }
8275
8276 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8277 {
8278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8279         enum nl80211_ps_state ps_state;
8280         struct wireless_dev *wdev;
8281         struct net_device *dev = info->user_ptr[1];
8282         struct sk_buff *msg;
8283         void *hdr;
8284         int err;
8285
8286         wdev = dev->ieee80211_ptr;
8287
8288         if (!rdev->ops->set_power_mgmt)
8289                 return -EOPNOTSUPP;
8290
8291         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8292         if (!msg)
8293                 return -ENOMEM;
8294
8295         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8296                              NL80211_CMD_GET_POWER_SAVE);
8297         if (!hdr) {
8298                 err = -ENOBUFS;
8299                 goto free_msg;
8300         }
8301
8302         if (wdev->ps)
8303                 ps_state = NL80211_PS_ENABLED;
8304         else
8305                 ps_state = NL80211_PS_DISABLED;
8306
8307         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8308                 goto nla_put_failure;
8309
8310         genlmsg_end(msg, hdr);
8311         return genlmsg_reply(msg, info);
8312
8313  nla_put_failure:
8314         err = -ENOBUFS;
8315  free_msg:
8316         nlmsg_free(msg);
8317         return err;
8318 }
8319
8320 static const struct nla_policy
8321 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8322         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8323         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8324         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8325         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8326         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8327         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8328 };
8329
8330 static int nl80211_set_cqm_txe(struct genl_info *info,
8331                                u32 rate, u32 pkts, u32 intvl)
8332 {
8333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8334         struct net_device *dev = info->user_ptr[1];
8335         struct wireless_dev *wdev = dev->ieee80211_ptr;
8336
8337         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8338                 return -EINVAL;
8339
8340         if (!rdev->ops->set_cqm_txe_config)
8341                 return -EOPNOTSUPP;
8342
8343         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8344             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8345                 return -EOPNOTSUPP;
8346
8347         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8348 }
8349
8350 static int nl80211_set_cqm_rssi(struct genl_info *info,
8351                                 s32 threshold, u32 hysteresis)
8352 {
8353         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8354         struct net_device *dev = info->user_ptr[1];
8355         struct wireless_dev *wdev = dev->ieee80211_ptr;
8356
8357         if (threshold > 0)
8358                 return -EINVAL;
8359
8360         /* disabling - hysteresis should also be zero then */
8361         if (threshold == 0)
8362                 hysteresis = 0;
8363
8364         if (!rdev->ops->set_cqm_rssi_config)
8365                 return -EOPNOTSUPP;
8366
8367         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8368             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8369                 return -EOPNOTSUPP;
8370
8371         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8372 }
8373
8374 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8375 {
8376         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8377         struct nlattr *cqm;
8378         int err;
8379
8380         cqm = info->attrs[NL80211_ATTR_CQM];
8381         if (!cqm)
8382                 return -EINVAL;
8383
8384         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8385                                nl80211_attr_cqm_policy);
8386         if (err)
8387                 return err;
8388
8389         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8390             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8391                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8392                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8393
8394                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8395         }
8396
8397         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8398             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8399             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8400                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8401                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8402                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8403
8404                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8405         }
8406
8407         return -EINVAL;
8408 }
8409
8410 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8411 {
8412         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8413         struct net_device *dev = info->user_ptr[1];
8414         struct ocb_setup setup = {};
8415         int err;
8416
8417         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8418         if (err)
8419                 return err;
8420
8421         return cfg80211_join_ocb(rdev, dev, &setup);
8422 }
8423
8424 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8425 {
8426         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8427         struct net_device *dev = info->user_ptr[1];
8428
8429         return cfg80211_leave_ocb(rdev, dev);
8430 }
8431
8432 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8433 {
8434         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8435         struct net_device *dev = info->user_ptr[1];
8436         struct mesh_config cfg;
8437         struct mesh_setup setup;
8438         int err;
8439
8440         /* start with default */
8441         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8442         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8443
8444         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8445                 /* and parse parameters if given */
8446                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8447                 if (err)
8448                         return err;
8449         }
8450
8451         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8452             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8453                 return -EINVAL;
8454
8455         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8456         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8457
8458         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8459             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8460                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8461                         return -EINVAL;
8462
8463         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8464                 setup.beacon_interval =
8465                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8466                 if (setup.beacon_interval < 10 ||
8467                     setup.beacon_interval > 10000)
8468                         return -EINVAL;
8469         }
8470
8471         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8472                 setup.dtim_period =
8473                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8474                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8475                         return -EINVAL;
8476         }
8477
8478         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8479                 /* parse additional setup parameters if given */
8480                 err = nl80211_parse_mesh_setup(info, &setup);
8481                 if (err)
8482                         return err;
8483         }
8484
8485         if (setup.user_mpm)
8486                 cfg.auto_open_plinks = false;
8487
8488         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8489                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8490                 if (err)
8491                         return err;
8492         } else {
8493                 /* cfg80211_join_mesh() will sort it out */
8494                 setup.chandef.chan = NULL;
8495         }
8496
8497         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8498                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8499                 int n_rates =
8500                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8501                 struct ieee80211_supported_band *sband;
8502
8503                 if (!setup.chandef.chan)
8504                         return -EINVAL;
8505
8506                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8507
8508                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8509                                              &setup.basic_rates);
8510                 if (err)
8511                         return err;
8512         }
8513
8514         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8515 }
8516
8517 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8518 {
8519         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8520         struct net_device *dev = info->user_ptr[1];
8521
8522         return cfg80211_leave_mesh(rdev, dev);
8523 }
8524
8525 #ifdef CONFIG_PM
8526 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8527                                         struct cfg80211_registered_device *rdev)
8528 {
8529         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8530         struct nlattr *nl_pats, *nl_pat;
8531         int i, pat_len;
8532
8533         if (!wowlan->n_patterns)
8534                 return 0;
8535
8536         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8537         if (!nl_pats)
8538                 return -ENOBUFS;
8539
8540         for (i = 0; i < wowlan->n_patterns; i++) {
8541                 nl_pat = nla_nest_start(msg, i + 1);
8542                 if (!nl_pat)
8543                         return -ENOBUFS;
8544                 pat_len = wowlan->patterns[i].pattern_len;
8545                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8546                             wowlan->patterns[i].mask) ||
8547                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8548                             wowlan->patterns[i].pattern) ||
8549                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8550                                 wowlan->patterns[i].pkt_offset))
8551                         return -ENOBUFS;
8552                 nla_nest_end(msg, nl_pat);
8553         }
8554         nla_nest_end(msg, nl_pats);
8555
8556         return 0;
8557 }
8558
8559 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
8560                                    struct cfg80211_wowlan_tcp *tcp)
8561 {
8562         struct nlattr *nl_tcp;
8563
8564         if (!tcp)
8565                 return 0;
8566
8567         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
8568         if (!nl_tcp)
8569                 return -ENOBUFS;
8570
8571         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
8572             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
8573             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
8574             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
8575             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
8576             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
8577                     tcp->payload_len, tcp->payload) ||
8578             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
8579                         tcp->data_interval) ||
8580             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
8581                     tcp->wake_len, tcp->wake_data) ||
8582             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
8583                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
8584                 return -ENOBUFS;
8585
8586         if (tcp->payload_seq.len &&
8587             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
8588                     sizeof(tcp->payload_seq), &tcp->payload_seq))
8589                 return -ENOBUFS;
8590
8591         if (tcp->payload_tok.len &&
8592             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
8593                     sizeof(tcp->payload_tok) + tcp->tokens_size,
8594                     &tcp->payload_tok))
8595                 return -ENOBUFS;
8596
8597         nla_nest_end(msg, nl_tcp);
8598
8599         return 0;
8600 }
8601
8602 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
8603 {
8604         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8605         struct sk_buff *msg;
8606         void *hdr;
8607         u32 size = NLMSG_DEFAULT_SIZE;
8608
8609         if (!rdev->wiphy.wowlan)
8610                 return -EOPNOTSUPP;
8611
8612         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
8613                 /* adjust size to have room for all the data */
8614                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
8615                         rdev->wiphy.wowlan_config->tcp->payload_len +
8616                         rdev->wiphy.wowlan_config->tcp->wake_len +
8617                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
8618         }
8619
8620         msg = nlmsg_new(size, GFP_KERNEL);
8621         if (!msg)
8622                 return -ENOMEM;
8623
8624         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8625                              NL80211_CMD_GET_WOWLAN);
8626         if (!hdr)
8627                 goto nla_put_failure;
8628
8629         if (rdev->wiphy.wowlan_config) {
8630                 struct nlattr *nl_wowlan;
8631
8632                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
8633                 if (!nl_wowlan)
8634                         goto nla_put_failure;
8635
8636                 if ((rdev->wiphy.wowlan_config->any &&
8637                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
8638                     (rdev->wiphy.wowlan_config->disconnect &&
8639                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
8640                     (rdev->wiphy.wowlan_config->magic_pkt &&
8641                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
8642                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
8643                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
8644                     (rdev->wiphy.wowlan_config->eap_identity_req &&
8645                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
8646                     (rdev->wiphy.wowlan_config->four_way_handshake &&
8647                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
8648                     (rdev->wiphy.wowlan_config->rfkill_release &&
8649                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
8650                         goto nla_put_failure;
8651
8652                 if (nl80211_send_wowlan_patterns(msg, rdev))
8653                         goto nla_put_failure;
8654
8655                 if (nl80211_send_wowlan_tcp(msg,
8656                                             rdev->wiphy.wowlan_config->tcp))
8657                         goto nla_put_failure;
8658
8659                 nla_nest_end(msg, nl_wowlan);
8660         }
8661
8662         genlmsg_end(msg, hdr);
8663         return genlmsg_reply(msg, info);
8664
8665 nla_put_failure:
8666         nlmsg_free(msg);
8667         return -ENOBUFS;
8668 }
8669
8670 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
8671                                     struct nlattr *attr,
8672                                     struct cfg80211_wowlan *trig)
8673 {
8674         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
8675         struct cfg80211_wowlan_tcp *cfg;
8676         struct nl80211_wowlan_tcp_data_token *tok = NULL;
8677         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
8678         u32 size;
8679         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
8680         int err, port;
8681
8682         if (!rdev->wiphy.wowlan->tcp)
8683                 return -EINVAL;
8684
8685         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8686                         nla_data(attr), nla_len(attr),
8687                         nl80211_wowlan_tcp_policy);
8688         if (err)
8689                 return err;
8690
8691         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8692             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8693             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8694             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8695             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8696             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8697             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8698             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8699                 return -EINVAL;
8700
8701         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8702         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8703                 return -EINVAL;
8704
8705         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8706                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8707             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8708                 return -EINVAL;
8709
8710         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8711         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8712                 return -EINVAL;
8713
8714         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8715         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8716                 return -EINVAL;
8717
8718         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8719                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8720
8721                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8722                 tokens_size = tokln - sizeof(*tok);
8723
8724                 if (!tok->len || tokens_size % tok->len)
8725                         return -EINVAL;
8726                 if (!rdev->wiphy.wowlan->tcp->tok)
8727                         return -EINVAL;
8728                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8729                         return -EINVAL;
8730                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8731                         return -EINVAL;
8732                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8733                         return -EINVAL;
8734                 if (tok->offset + tok->len > data_size)
8735                         return -EINVAL;
8736         }
8737
8738         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8739                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8740                 if (!rdev->wiphy.wowlan->tcp->seq)
8741                         return -EINVAL;
8742                 if (seq->len == 0 || seq->len > 4)
8743                         return -EINVAL;
8744                 if (seq->len + seq->offset > data_size)
8745                         return -EINVAL;
8746         }
8747
8748         size = sizeof(*cfg);
8749         size += data_size;
8750         size += wake_size + wake_mask_size;
8751         size += tokens_size;
8752
8753         cfg = kzalloc(size, GFP_KERNEL);
8754         if (!cfg)
8755                 return -ENOMEM;
8756         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8757         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8758         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8759                ETH_ALEN);
8760         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8761                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8762         else
8763                 port = 0;
8764 #ifdef CONFIG_INET
8765         /* allocate a socket and port for it and use it */
8766         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8767                             IPPROTO_TCP, &cfg->sock, 1);
8768         if (err) {
8769                 kfree(cfg);
8770                 return err;
8771         }
8772         if (inet_csk_get_port(cfg->sock->sk, port)) {
8773                 sock_release(cfg->sock);
8774                 kfree(cfg);
8775                 return -EADDRINUSE;
8776         }
8777         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8778 #else
8779         if (!port) {
8780                 kfree(cfg);
8781                 return -EINVAL;
8782         }
8783         cfg->src_port = port;
8784 #endif
8785
8786         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8787         cfg->payload_len = data_size;
8788         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8789         memcpy((void *)cfg->payload,
8790                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8791                data_size);
8792         if (seq)
8793                 cfg->payload_seq = *seq;
8794         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8795         cfg->wake_len = wake_size;
8796         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8797         memcpy((void *)cfg->wake_data,
8798                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8799                wake_size);
8800         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8801                          data_size + wake_size;
8802         memcpy((void *)cfg->wake_mask,
8803                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8804                wake_mask_size);
8805         if (tok) {
8806                 cfg->tokens_size = tokens_size;
8807                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8808         }
8809
8810         trig->tcp = cfg;
8811
8812         return 0;
8813 }
8814
8815 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
8816                                    const struct wiphy_wowlan_support *wowlan,
8817                                    struct nlattr *attr,
8818                                    struct cfg80211_wowlan *trig)
8819 {
8820         struct nlattr **tb;
8821         int err;
8822
8823         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
8824         if (!tb)
8825                 return -ENOMEM;
8826
8827         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
8828                 err = -EOPNOTSUPP;
8829                 goto out;
8830         }
8831
8832         err = nla_parse(tb, NL80211_ATTR_MAX,
8833                         nla_data(attr), nla_len(attr),
8834                         nl80211_policy);
8835         if (err)
8836                 goto out;
8837
8838         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
8839         err = PTR_ERR_OR_ZERO(trig->nd_config);
8840         if (err)
8841                 trig->nd_config = NULL;
8842
8843 out:
8844         kfree(tb);
8845         return err;
8846 }
8847
8848 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8849 {
8850         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8851         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8852         struct cfg80211_wowlan new_triggers = {};
8853         struct cfg80211_wowlan *ntrig;
8854         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8855         int err, i;
8856         bool prev_enabled = rdev->wiphy.wowlan_config;
8857
8858         if (!wowlan)
8859                 return -EOPNOTSUPP;
8860
8861         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8862                 cfg80211_rdev_free_wowlan(rdev);
8863                 rdev->wiphy.wowlan_config = NULL;
8864                 goto set_wakeup;
8865         }
8866
8867         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8868                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8869                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8870                         nl80211_wowlan_policy);
8871         if (err)
8872                 return err;
8873
8874         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8875                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8876                         return -EINVAL;
8877                 new_triggers.any = true;
8878         }
8879
8880         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8881                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8882                         return -EINVAL;
8883                 new_triggers.disconnect = true;
8884         }
8885
8886         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8887                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8888                         return -EINVAL;
8889                 new_triggers.magic_pkt = true;
8890         }
8891
8892         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8893                 return -EINVAL;
8894
8895         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8896                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8897                         return -EINVAL;
8898                 new_triggers.gtk_rekey_failure = true;
8899         }
8900
8901         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8902                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8903                         return -EINVAL;
8904                 new_triggers.eap_identity_req = true;
8905         }
8906
8907         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8908                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8909                         return -EINVAL;
8910                 new_triggers.four_way_handshake = true;
8911         }
8912
8913         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8914                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8915                         return -EINVAL;
8916                 new_triggers.rfkill_release = true;
8917         }
8918
8919         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8920                 struct nlattr *pat;
8921                 int n_patterns = 0;
8922                 int rem, pat_len, mask_len, pkt_offset;
8923                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8924
8925                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8926                                     rem)
8927                         n_patterns++;
8928                 if (n_patterns > wowlan->n_patterns)
8929                         return -EINVAL;
8930
8931                 new_triggers.patterns = kcalloc(n_patterns,
8932                                                 sizeof(new_triggers.patterns[0]),
8933                                                 GFP_KERNEL);
8934                 if (!new_triggers.patterns)
8935                         return -ENOMEM;
8936
8937                 new_triggers.n_patterns = n_patterns;
8938                 i = 0;
8939
8940                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8941                                     rem) {
8942                         u8 *mask_pat;
8943
8944                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8945                                   nla_len(pat), NULL);
8946                         err = -EINVAL;
8947                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8948                             !pat_tb[NL80211_PKTPAT_PATTERN])
8949                                 goto error;
8950                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8951                         mask_len = DIV_ROUND_UP(pat_len, 8);
8952                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8953                                 goto error;
8954                         if (pat_len > wowlan->pattern_max_len ||
8955                             pat_len < wowlan->pattern_min_len)
8956                                 goto error;
8957
8958                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8959                                 pkt_offset = 0;
8960                         else
8961                                 pkt_offset = nla_get_u32(
8962                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8963                         if (pkt_offset > wowlan->max_pkt_offset)
8964                                 goto error;
8965                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8966
8967                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
8968                         if (!mask_pat) {
8969                                 err = -ENOMEM;
8970                                 goto error;
8971                         }
8972                         new_triggers.patterns[i].mask = mask_pat;
8973                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8974                                mask_len);
8975                         mask_pat += mask_len;
8976                         new_triggers.patterns[i].pattern = mask_pat;
8977                         new_triggers.patterns[i].pattern_len = pat_len;
8978                         memcpy(mask_pat,
8979                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8980                                pat_len);
8981                         i++;
8982                 }
8983         }
8984
8985         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8986                 err = nl80211_parse_wowlan_tcp(
8987                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8988                         &new_triggers);
8989                 if (err)
8990                         goto error;
8991         }
8992
8993         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
8994                 err = nl80211_parse_wowlan_nd(
8995                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
8996                         &new_triggers);
8997                 if (err)
8998                         goto error;
8999         }
9000
9001         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9002         if (!ntrig) {
9003                 err = -ENOMEM;
9004                 goto error;
9005         }
9006         cfg80211_rdev_free_wowlan(rdev);
9007         rdev->wiphy.wowlan_config = ntrig;
9008
9009  set_wakeup:
9010         if (rdev->ops->set_wakeup &&
9011             prev_enabled != !!rdev->wiphy.wowlan_config)
9012                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9013
9014         return 0;
9015  error:
9016         for (i = 0; i < new_triggers.n_patterns; i++)
9017                 kfree(new_triggers.patterns[i].mask);
9018         kfree(new_triggers.patterns);
9019         if (new_triggers.tcp && new_triggers.tcp->sock)
9020                 sock_release(new_triggers.tcp->sock);
9021         kfree(new_triggers.tcp);
9022         return err;
9023 }
9024 #endif
9025
9026 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9027                                        struct cfg80211_registered_device *rdev)
9028 {
9029         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9030         int i, j, pat_len;
9031         struct cfg80211_coalesce_rules *rule;
9032
9033         if (!rdev->coalesce->n_rules)
9034                 return 0;
9035
9036         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9037         if (!nl_rules)
9038                 return -ENOBUFS;
9039
9040         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9041                 nl_rule = nla_nest_start(msg, i + 1);
9042                 if (!nl_rule)
9043                         return -ENOBUFS;
9044
9045                 rule = &rdev->coalesce->rules[i];
9046                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9047                                 rule->delay))
9048                         return -ENOBUFS;
9049
9050                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9051                                 rule->condition))
9052                         return -ENOBUFS;
9053
9054                 nl_pats = nla_nest_start(msg,
9055                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9056                 if (!nl_pats)
9057                         return -ENOBUFS;
9058
9059                 for (j = 0; j < rule->n_patterns; j++) {
9060                         nl_pat = nla_nest_start(msg, j + 1);
9061                         if (!nl_pat)
9062                                 return -ENOBUFS;
9063                         pat_len = rule->patterns[j].pattern_len;
9064                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9065                                     DIV_ROUND_UP(pat_len, 8),
9066                                     rule->patterns[j].mask) ||
9067                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9068                                     rule->patterns[j].pattern) ||
9069                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9070                                         rule->patterns[j].pkt_offset))
9071                                 return -ENOBUFS;
9072                         nla_nest_end(msg, nl_pat);
9073                 }
9074                 nla_nest_end(msg, nl_pats);
9075                 nla_nest_end(msg, nl_rule);
9076         }
9077         nla_nest_end(msg, nl_rules);
9078
9079         return 0;
9080 }
9081
9082 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9083 {
9084         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9085         struct sk_buff *msg;
9086         void *hdr;
9087
9088         if (!rdev->wiphy.coalesce)
9089                 return -EOPNOTSUPP;
9090
9091         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9092         if (!msg)
9093                 return -ENOMEM;
9094
9095         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9096                              NL80211_CMD_GET_COALESCE);
9097         if (!hdr)
9098                 goto nla_put_failure;
9099
9100         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9101                 goto nla_put_failure;
9102
9103         genlmsg_end(msg, hdr);
9104         return genlmsg_reply(msg, info);
9105
9106 nla_put_failure:
9107         nlmsg_free(msg);
9108         return -ENOBUFS;
9109 }
9110
9111 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9112 {
9113         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9114         int i, j;
9115         struct cfg80211_coalesce_rules *rule;
9116
9117         if (!coalesce)
9118                 return;
9119
9120         for (i = 0; i < coalesce->n_rules; i++) {
9121                 rule = &coalesce->rules[i];
9122                 for (j = 0; j < rule->n_patterns; j++)
9123                         kfree(rule->patterns[j].mask);
9124                 kfree(rule->patterns);
9125         }
9126         kfree(coalesce->rules);
9127         kfree(coalesce);
9128         rdev->coalesce = NULL;
9129 }
9130
9131 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9132                                        struct nlattr *rule,
9133                                        struct cfg80211_coalesce_rules *new_rule)
9134 {
9135         int err, i;
9136         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9137         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9138         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9139         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9140
9141         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9142                         nla_len(rule), nl80211_coalesce_policy);
9143         if (err)
9144                 return err;
9145
9146         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9147                 new_rule->delay =
9148                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9149         if (new_rule->delay > coalesce->max_delay)
9150                 return -EINVAL;
9151
9152         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9153                 new_rule->condition =
9154                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9155         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9156             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9157                 return -EINVAL;
9158
9159         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9160                 return -EINVAL;
9161
9162         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9163                             rem)
9164                 n_patterns++;
9165         if (n_patterns > coalesce->n_patterns)
9166                 return -EINVAL;
9167
9168         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9169                                      GFP_KERNEL);
9170         if (!new_rule->patterns)
9171                 return -ENOMEM;
9172
9173         new_rule->n_patterns = n_patterns;
9174         i = 0;
9175
9176         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9177                             rem) {
9178                 u8 *mask_pat;
9179
9180                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9181                           nla_len(pat), NULL);
9182                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9183                     !pat_tb[NL80211_PKTPAT_PATTERN])
9184                         return -EINVAL;
9185                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9186                 mask_len = DIV_ROUND_UP(pat_len, 8);
9187                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9188                         return -EINVAL;
9189                 if (pat_len > coalesce->pattern_max_len ||
9190                     pat_len < coalesce->pattern_min_len)
9191                         return -EINVAL;
9192
9193                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9194                         pkt_offset = 0;
9195                 else
9196                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9197                 if (pkt_offset > coalesce->max_pkt_offset)
9198                         return -EINVAL;
9199                 new_rule->patterns[i].pkt_offset = pkt_offset;
9200
9201                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9202                 if (!mask_pat)
9203                         return -ENOMEM;
9204
9205                 new_rule->patterns[i].mask = mask_pat;
9206                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9207                        mask_len);
9208
9209                 mask_pat += mask_len;
9210                 new_rule->patterns[i].pattern = mask_pat;
9211                 new_rule->patterns[i].pattern_len = pat_len;
9212                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9213                        pat_len);
9214                 i++;
9215         }
9216
9217         return 0;
9218 }
9219
9220 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9221 {
9222         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9223         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9224         struct cfg80211_coalesce new_coalesce = {};
9225         struct cfg80211_coalesce *n_coalesce;
9226         int err, rem_rule, n_rules = 0, i, j;
9227         struct nlattr *rule;
9228         struct cfg80211_coalesce_rules *tmp_rule;
9229
9230         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9231                 return -EOPNOTSUPP;
9232
9233         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9234                 cfg80211_rdev_free_coalesce(rdev);
9235                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
9236                 return 0;
9237         }
9238
9239         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9240                             rem_rule)
9241                 n_rules++;
9242         if (n_rules > coalesce->n_rules)
9243                 return -EINVAL;
9244
9245         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9246                                      GFP_KERNEL);
9247         if (!new_coalesce.rules)
9248                 return -ENOMEM;
9249
9250         new_coalesce.n_rules = n_rules;
9251         i = 0;
9252
9253         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9254                             rem_rule) {
9255                 err = nl80211_parse_coalesce_rule(rdev, rule,
9256                                                   &new_coalesce.rules[i]);
9257                 if (err)
9258                         goto error;
9259
9260                 i++;
9261         }
9262
9263         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
9264         if (err)
9265                 goto error;
9266
9267         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9268         if (!n_coalesce) {
9269                 err = -ENOMEM;
9270                 goto error;
9271         }
9272         cfg80211_rdev_free_coalesce(rdev);
9273         rdev->coalesce = n_coalesce;
9274
9275         return 0;
9276 error:
9277         for (i = 0; i < new_coalesce.n_rules; i++) {
9278                 tmp_rule = &new_coalesce.rules[i];
9279                 for (j = 0; j < tmp_rule->n_patterns; j++)
9280                         kfree(tmp_rule->patterns[j].mask);
9281                 kfree(tmp_rule->patterns);
9282         }
9283         kfree(new_coalesce.rules);
9284
9285         return err;
9286 }
9287
9288 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9289 {
9290         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9291         struct net_device *dev = info->user_ptr[1];
9292         struct wireless_dev *wdev = dev->ieee80211_ptr;
9293         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9294         struct cfg80211_gtk_rekey_data rekey_data;
9295         int err;
9296
9297         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9298                 return -EINVAL;
9299
9300         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9301                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9302                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9303                         nl80211_rekey_policy);
9304         if (err)
9305                 return err;
9306
9307         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9308                 return -ERANGE;
9309         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9310                 return -ERANGE;
9311         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9312                 return -ERANGE;
9313
9314         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9315         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9316         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9317
9318         wdev_lock(wdev);
9319         if (!wdev->current_bss) {
9320                 err = -ENOTCONN;
9321                 goto out;
9322         }
9323
9324         if (!rdev->ops->set_rekey_data) {
9325                 err = -EOPNOTSUPP;
9326                 goto out;
9327         }
9328
9329         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9330  out:
9331         wdev_unlock(wdev);
9332         return err;
9333 }
9334
9335 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9336                                              struct genl_info *info)
9337 {
9338         struct net_device *dev = info->user_ptr[1];
9339         struct wireless_dev *wdev = dev->ieee80211_ptr;
9340
9341         if (wdev->iftype != NL80211_IFTYPE_AP &&
9342             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9343                 return -EINVAL;
9344
9345         if (wdev->ap_unexpected_nlportid)
9346                 return -EBUSY;
9347
9348         wdev->ap_unexpected_nlportid = info->snd_portid;
9349         return 0;
9350 }
9351
9352 static int nl80211_probe_client(struct sk_buff *skb,
9353                                 struct genl_info *info)
9354 {
9355         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9356         struct net_device *dev = info->user_ptr[1];
9357         struct wireless_dev *wdev = dev->ieee80211_ptr;
9358         struct sk_buff *msg;
9359         void *hdr;
9360         const u8 *addr;
9361         u64 cookie;
9362         int err;
9363
9364         if (wdev->iftype != NL80211_IFTYPE_AP &&
9365             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9366                 return -EOPNOTSUPP;
9367
9368         if (!info->attrs[NL80211_ATTR_MAC])
9369                 return -EINVAL;
9370
9371         if (!rdev->ops->probe_client)
9372                 return -EOPNOTSUPP;
9373
9374         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9375         if (!msg)
9376                 return -ENOMEM;
9377
9378         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9379                              NL80211_CMD_PROBE_CLIENT);
9380         if (!hdr) {
9381                 err = -ENOBUFS;
9382                 goto free_msg;
9383         }
9384
9385         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9386
9387         err = rdev_probe_client(rdev, dev, addr, &cookie);
9388         if (err)
9389                 goto free_msg;
9390
9391         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9392                 goto nla_put_failure;
9393
9394         genlmsg_end(msg, hdr);
9395
9396         return genlmsg_reply(msg, info);
9397
9398  nla_put_failure:
9399         err = -ENOBUFS;
9400  free_msg:
9401         nlmsg_free(msg);
9402         return err;
9403 }
9404
9405 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9406 {
9407         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9408         struct cfg80211_beacon_registration *reg, *nreg;
9409         int rv;
9410
9411         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9412                 return -EOPNOTSUPP;
9413
9414         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9415         if (!nreg)
9416                 return -ENOMEM;
9417
9418         /* First, check if already registered. */
9419         spin_lock_bh(&rdev->beacon_registrations_lock);
9420         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9421                 if (reg->nlportid == info->snd_portid) {
9422                         rv = -EALREADY;
9423                         goto out_err;
9424                 }
9425         }
9426         /* Add it to the list */
9427         nreg->nlportid = info->snd_portid;
9428         list_add(&nreg->list, &rdev->beacon_registrations);
9429
9430         spin_unlock_bh(&rdev->beacon_registrations_lock);
9431
9432         return 0;
9433 out_err:
9434         spin_unlock_bh(&rdev->beacon_registrations_lock);
9435         kfree(nreg);
9436         return rv;
9437 }
9438
9439 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9440 {
9441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9442         struct wireless_dev *wdev = info->user_ptr[1];
9443         int err;
9444
9445         if (!rdev->ops->start_p2p_device)
9446                 return -EOPNOTSUPP;
9447
9448         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9449                 return -EOPNOTSUPP;
9450
9451         if (wdev->p2p_started)
9452                 return 0;
9453
9454         if (rfkill_blocked(rdev->rfkill))
9455                 return -ERFKILL;
9456
9457         err = rdev_start_p2p_device(rdev, wdev);
9458         if (err)
9459                 return err;
9460
9461         wdev->p2p_started = true;
9462         rdev->opencount++;
9463
9464         return 0;
9465 }
9466
9467 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
9468 {
9469         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9470         struct wireless_dev *wdev = info->user_ptr[1];
9471
9472         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9473                 return -EOPNOTSUPP;
9474
9475         if (!rdev->ops->stop_p2p_device)
9476                 return -EOPNOTSUPP;
9477
9478         cfg80211_stop_p2p_device(rdev, wdev);
9479
9480         return 0;
9481 }
9482
9483 static int nl80211_get_protocol_features(struct sk_buff *skb,
9484                                          struct genl_info *info)
9485 {
9486         void *hdr;
9487         struct sk_buff *msg;
9488
9489         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9490         if (!msg)
9491                 return -ENOMEM;
9492
9493         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9494                              NL80211_CMD_GET_PROTOCOL_FEATURES);
9495         if (!hdr)
9496                 goto nla_put_failure;
9497
9498         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
9499                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
9500                 goto nla_put_failure;
9501
9502         genlmsg_end(msg, hdr);
9503         return genlmsg_reply(msg, info);
9504
9505  nla_put_failure:
9506         kfree_skb(msg);
9507         return -ENOBUFS;
9508 }
9509
9510 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
9511 {
9512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9513         struct cfg80211_update_ft_ies_params ft_params;
9514         struct net_device *dev = info->user_ptr[1];
9515
9516         if (!rdev->ops->update_ft_ies)
9517                 return -EOPNOTSUPP;
9518
9519         if (!info->attrs[NL80211_ATTR_MDID] ||
9520             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9521                 return -EINVAL;
9522
9523         memset(&ft_params, 0, sizeof(ft_params));
9524         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
9525         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9526         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9527
9528         return rdev_update_ft_ies(rdev, dev, &ft_params);
9529 }
9530
9531 static int nl80211_crit_protocol_start(struct sk_buff *skb,
9532                                        struct genl_info *info)
9533 {
9534         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9535         struct wireless_dev *wdev = info->user_ptr[1];
9536         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
9537         u16 duration;
9538         int ret;
9539
9540         if (!rdev->ops->crit_proto_start)
9541                 return -EOPNOTSUPP;
9542
9543         if (WARN_ON(!rdev->ops->crit_proto_stop))
9544                 return -EINVAL;
9545
9546         if (rdev->crit_proto_nlportid)
9547                 return -EBUSY;
9548
9549         /* determine protocol if provided */
9550         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
9551                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
9552
9553         if (proto >= NUM_NL80211_CRIT_PROTO)
9554                 return -EINVAL;
9555
9556         /* timeout must be provided */
9557         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
9558                 return -EINVAL;
9559
9560         duration =
9561                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
9562
9563         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
9564                 return -ERANGE;
9565
9566         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
9567         if (!ret)
9568                 rdev->crit_proto_nlportid = info->snd_portid;
9569
9570         return ret;
9571 }
9572
9573 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
9574                                       struct genl_info *info)
9575 {
9576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9577         struct wireless_dev *wdev = info->user_ptr[1];
9578
9579         if (!rdev->ops->crit_proto_stop)
9580                 return -EOPNOTSUPP;
9581
9582         if (rdev->crit_proto_nlportid) {
9583                 rdev->crit_proto_nlportid = 0;
9584                 rdev_crit_proto_stop(rdev, wdev);
9585         }
9586         return 0;
9587 }
9588
9589 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
9590 {
9591         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9592         struct wireless_dev *wdev =
9593                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
9594         int i, err;
9595         u32 vid, subcmd;
9596
9597         if (!rdev->wiphy.vendor_commands)
9598                 return -EOPNOTSUPP;
9599
9600         if (IS_ERR(wdev)) {
9601                 err = PTR_ERR(wdev);
9602                 if (err != -EINVAL)
9603                         return err;
9604                 wdev = NULL;
9605         } else if (wdev->wiphy != &rdev->wiphy) {
9606                 return -EINVAL;
9607         }
9608
9609         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
9610             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
9611                 return -EINVAL;
9612
9613         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
9614         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
9615         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
9616                 const struct wiphy_vendor_command *vcmd;
9617                 void *data = NULL;
9618                 int len = 0;
9619
9620                 vcmd = &rdev->wiphy.vendor_commands[i];
9621
9622                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
9623                         continue;
9624
9625                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
9626                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
9627                         if (!wdev)
9628                                 return -EINVAL;
9629                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
9630                             !wdev->netdev)
9631                                 return -EINVAL;
9632
9633                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
9634                                 if (wdev->netdev &&
9635                                     !netif_running(wdev->netdev))
9636                                         return -ENETDOWN;
9637                                 if (!wdev->netdev && !wdev->p2p_started)
9638                                         return -ENETDOWN;
9639                         }
9640                 } else {
9641                         wdev = NULL;
9642                 }
9643
9644                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
9645                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9646                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
9647                 }
9648
9649                 rdev->cur_cmd_info = info;
9650                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
9651                                                           data, len);
9652                 rdev->cur_cmd_info = NULL;
9653                 return err;
9654         }
9655
9656         return -EOPNOTSUPP;
9657 }
9658
9659 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
9660                                            enum nl80211_commands cmd,
9661                                            enum nl80211_attrs attr,
9662                                            int approxlen)
9663 {
9664         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
9665
9666         if (WARN_ON(!rdev->cur_cmd_info))
9667                 return NULL;
9668
9669         return __cfg80211_alloc_vendor_skb(rdev, approxlen,
9670                                            rdev->cur_cmd_info->snd_portid,
9671                                            rdev->cur_cmd_info->snd_seq,
9672                                            cmd, attr, NULL, GFP_KERNEL);
9673 }
9674 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
9675
9676 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
9677 {
9678         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
9679         void *hdr = ((void **)skb->cb)[1];
9680         struct nlattr *data = ((void **)skb->cb)[2];
9681
9682         /* clear CB data for netlink core to own from now on */
9683         memset(skb->cb, 0, sizeof(skb->cb));
9684
9685         if (WARN_ON(!rdev->cur_cmd_info)) {
9686                 kfree_skb(skb);
9687                 return -EINVAL;
9688         }
9689
9690         nla_nest_end(skb, data);
9691         genlmsg_end(skb, hdr);
9692         return genlmsg_reply(skb, rdev->cur_cmd_info);
9693 }
9694 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
9695
9696
9697 static int nl80211_set_qos_map(struct sk_buff *skb,
9698                                struct genl_info *info)
9699 {
9700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9701         struct cfg80211_qos_map *qos_map = NULL;
9702         struct net_device *dev = info->user_ptr[1];
9703         u8 *pos, len, num_des, des_len, des;
9704         int ret;
9705
9706         if (!rdev->ops->set_qos_map)
9707                 return -EOPNOTSUPP;
9708
9709         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
9710                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
9711                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
9712
9713                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
9714                     len > IEEE80211_QOS_MAP_LEN_MAX)
9715                         return -EINVAL;
9716
9717                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
9718                 if (!qos_map)
9719                         return -ENOMEM;
9720
9721                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
9722                 if (num_des) {
9723                         des_len = num_des *
9724                                 sizeof(struct cfg80211_dscp_exception);
9725                         memcpy(qos_map->dscp_exception, pos, des_len);
9726                         qos_map->num_des = num_des;
9727                         for (des = 0; des < num_des; des++) {
9728                                 if (qos_map->dscp_exception[des].up > 7) {
9729                                         kfree(qos_map);
9730                                         return -EINVAL;
9731                                 }
9732                         }
9733                         pos += des_len;
9734                 }
9735                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
9736         }
9737
9738         wdev_lock(dev->ieee80211_ptr);
9739         ret = nl80211_key_allowed(dev->ieee80211_ptr);
9740         if (!ret)
9741                 ret = rdev_set_qos_map(rdev, dev, qos_map);
9742         wdev_unlock(dev->ieee80211_ptr);
9743
9744         kfree(qos_map);
9745         return ret;
9746 }
9747
9748 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
9749 {
9750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9751         struct net_device *dev = info->user_ptr[1];
9752         struct wireless_dev *wdev = dev->ieee80211_ptr;
9753         const u8 *peer;
9754         u8 tsid, up;
9755         u16 admitted_time = 0;
9756         int err;
9757
9758         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
9759                 return -EOPNOTSUPP;
9760
9761         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
9762             !info->attrs[NL80211_ATTR_USER_PRIO])
9763                 return -EINVAL;
9764
9765         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
9766         if (tsid >= IEEE80211_NUM_TIDS)
9767                 return -EINVAL;
9768
9769         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
9770         if (up >= IEEE80211_NUM_UPS)
9771                 return -EINVAL;
9772
9773         /* WMM uses TIDs 0-7 even for TSPEC */
9774         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
9775                 /* TODO: handle 802.11 TSPEC/admission control
9776                  * need more attributes for that (e.g. BA session requirement);
9777                  * change the WMM adminssion test above to allow both then
9778                  */
9779                 return -EINVAL;
9780         }
9781
9782         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9783
9784         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
9785                 admitted_time =
9786                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
9787                 if (!admitted_time)
9788                         return -EINVAL;
9789         }
9790
9791         wdev_lock(wdev);
9792         switch (wdev->iftype) {
9793         case NL80211_IFTYPE_STATION:
9794         case NL80211_IFTYPE_P2P_CLIENT:
9795                 if (wdev->current_bss)
9796                         break;
9797                 err = -ENOTCONN;
9798                 goto out;
9799         default:
9800                 err = -EOPNOTSUPP;
9801                 goto out;
9802         }
9803
9804         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
9805
9806  out:
9807         wdev_unlock(wdev);
9808         return err;
9809 }
9810
9811 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
9812 {
9813         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9814         struct net_device *dev = info->user_ptr[1];
9815         struct wireless_dev *wdev = dev->ieee80211_ptr;
9816         const u8 *peer;
9817         u8 tsid;
9818         int err;
9819
9820         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
9821                 return -EINVAL;
9822
9823         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
9824         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9825
9826         wdev_lock(wdev);
9827         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
9828         wdev_unlock(wdev);
9829
9830         return err;
9831 }
9832
9833 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
9834                                        struct genl_info *info)
9835 {
9836         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9837         struct net_device *dev = info->user_ptr[1];
9838         struct wireless_dev *wdev = dev->ieee80211_ptr;
9839         struct cfg80211_chan_def chandef = {};
9840         const u8 *addr;
9841         u8 oper_class;
9842         int err;
9843
9844         if (!rdev->ops->tdls_channel_switch ||
9845             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
9846                 return -EOPNOTSUPP;
9847
9848         switch (dev->ieee80211_ptr->iftype) {
9849         case NL80211_IFTYPE_STATION:
9850         case NL80211_IFTYPE_P2P_CLIENT:
9851                 break;
9852         default:
9853                 return -EOPNOTSUPP;
9854         }
9855
9856         if (!info->attrs[NL80211_ATTR_MAC] ||
9857             !info->attrs[NL80211_ATTR_OPER_CLASS])
9858                 return -EINVAL;
9859
9860         err = nl80211_parse_chandef(rdev, info, &chandef);
9861         if (err)
9862                 return err;
9863
9864         /*
9865          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
9866          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
9867          * specification is not defined for them.
9868          */
9869         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
9870             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
9871             chandef.width != NL80211_CHAN_WIDTH_20)
9872                 return -EINVAL;
9873
9874         /* we will be active on the TDLS link */
9875         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef, wdev->iftype))
9876                 return -EINVAL;
9877
9878         /* don't allow switching to DFS channels */
9879         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
9880                 return -EINVAL;
9881
9882         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9883         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
9884
9885         wdev_lock(wdev);
9886         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
9887         wdev_unlock(wdev);
9888
9889         return err;
9890 }
9891
9892 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
9893                                               struct genl_info *info)
9894 {
9895         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9896         struct net_device *dev = info->user_ptr[1];
9897         struct wireless_dev *wdev = dev->ieee80211_ptr;
9898         const u8 *addr;
9899
9900         if (!rdev->ops->tdls_channel_switch ||
9901             !rdev->ops->tdls_cancel_channel_switch ||
9902             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
9903                 return -EOPNOTSUPP;
9904
9905         switch (dev->ieee80211_ptr->iftype) {
9906         case NL80211_IFTYPE_STATION:
9907         case NL80211_IFTYPE_P2P_CLIENT:
9908                 break;
9909         default:
9910                 return -EOPNOTSUPP;
9911         }
9912
9913         if (!info->attrs[NL80211_ATTR_MAC])
9914                 return -EINVAL;
9915
9916         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9917
9918         wdev_lock(wdev);
9919         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
9920         wdev_unlock(wdev);
9921
9922         return 0;
9923 }
9924
9925 #define NL80211_FLAG_NEED_WIPHY         0x01
9926 #define NL80211_FLAG_NEED_NETDEV        0x02
9927 #define NL80211_FLAG_NEED_RTNL          0x04
9928 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
9929 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
9930                                          NL80211_FLAG_CHECK_NETDEV_UP)
9931 #define NL80211_FLAG_NEED_WDEV          0x10
9932 /* If a netdev is associated, it must be UP, P2P must be started */
9933 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
9934                                          NL80211_FLAG_CHECK_NETDEV_UP)
9935 #define NL80211_FLAG_CLEAR_SKB          0x20
9936
9937 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
9938                             struct genl_info *info)
9939 {
9940         struct cfg80211_registered_device *rdev;
9941         struct wireless_dev *wdev;
9942         struct net_device *dev;
9943         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
9944
9945         if (rtnl)
9946                 rtnl_lock();
9947
9948         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
9949                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
9950                 if (IS_ERR(rdev)) {
9951                         if (rtnl)
9952                                 rtnl_unlock();
9953                         return PTR_ERR(rdev);
9954                 }
9955                 info->user_ptr[0] = rdev;
9956         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
9957                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
9958                 ASSERT_RTNL();
9959
9960                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
9961                                                   info->attrs);
9962                 if (IS_ERR(wdev)) {
9963                         if (rtnl)
9964                                 rtnl_unlock();
9965                         return PTR_ERR(wdev);
9966                 }
9967
9968                 dev = wdev->netdev;
9969                 rdev = wiphy_to_rdev(wdev->wiphy);
9970
9971                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
9972                         if (!dev) {
9973                                 if (rtnl)
9974                                         rtnl_unlock();
9975                                 return -EINVAL;
9976                         }
9977
9978                         info->user_ptr[1] = dev;
9979                 } else {
9980                         info->user_ptr[1] = wdev;
9981                 }
9982
9983                 if (dev) {
9984                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
9985                             !netif_running(dev)) {
9986                                 if (rtnl)
9987                                         rtnl_unlock();
9988                                 return -ENETDOWN;
9989                         }
9990
9991                         dev_hold(dev);
9992                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
9993                         if (!wdev->p2p_started) {
9994                                 if (rtnl)
9995                                         rtnl_unlock();
9996                                 return -ENETDOWN;
9997                         }
9998                 }
9999
10000                 info->user_ptr[0] = rdev;
10001         }
10002
10003         return 0;
10004 }
10005
10006 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10007                               struct genl_info *info)
10008 {
10009         if (info->user_ptr[1]) {
10010                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10011                         struct wireless_dev *wdev = info->user_ptr[1];
10012
10013                         if (wdev->netdev)
10014                                 dev_put(wdev->netdev);
10015                 } else {
10016                         dev_put(info->user_ptr[1]);
10017                 }
10018         }
10019
10020         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10021                 rtnl_unlock();
10022
10023         /* If needed, clear the netlink message payload from the SKB
10024          * as it might contain key data that shouldn't stick around on
10025          * the heap after the SKB is freed. The netlink message header
10026          * is still needed for further processing, so leave it intact.
10027          */
10028         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10029                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10030
10031                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10032         }
10033 }
10034
10035 static const struct genl_ops nl80211_ops[] = {
10036         {
10037                 .cmd = NL80211_CMD_GET_WIPHY,
10038                 .doit = nl80211_get_wiphy,
10039                 .dumpit = nl80211_dump_wiphy,
10040                 .done = nl80211_dump_wiphy_done,
10041                 .policy = nl80211_policy,
10042                 /* can be retrieved by unprivileged users */
10043                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10044                                   NL80211_FLAG_NEED_RTNL,
10045         },
10046         {
10047                 .cmd = NL80211_CMD_SET_WIPHY,
10048                 .doit = nl80211_set_wiphy,
10049                 .policy = nl80211_policy,
10050                 .flags = GENL_ADMIN_PERM,
10051                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10052         },
10053         {
10054                 .cmd = NL80211_CMD_GET_INTERFACE,
10055                 .doit = nl80211_get_interface,
10056                 .dumpit = nl80211_dump_interface,
10057                 .policy = nl80211_policy,
10058                 /* can be retrieved by unprivileged users */
10059                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10060                                   NL80211_FLAG_NEED_RTNL,
10061         },
10062         {
10063                 .cmd = NL80211_CMD_SET_INTERFACE,
10064                 .doit = nl80211_set_interface,
10065                 .policy = nl80211_policy,
10066                 .flags = GENL_ADMIN_PERM,
10067                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10068                                   NL80211_FLAG_NEED_RTNL,
10069         },
10070         {
10071                 .cmd = NL80211_CMD_NEW_INTERFACE,
10072                 .doit = nl80211_new_interface,
10073                 .policy = nl80211_policy,
10074                 .flags = GENL_ADMIN_PERM,
10075                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10076                                   NL80211_FLAG_NEED_RTNL,
10077         },
10078         {
10079                 .cmd = NL80211_CMD_DEL_INTERFACE,
10080                 .doit = nl80211_del_interface,
10081                 .policy = nl80211_policy,
10082                 .flags = GENL_ADMIN_PERM,
10083                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10084                                   NL80211_FLAG_NEED_RTNL,
10085         },
10086         {
10087                 .cmd = NL80211_CMD_GET_KEY,
10088                 .doit = nl80211_get_key,
10089                 .policy = nl80211_policy,
10090                 .flags = GENL_ADMIN_PERM,
10091                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10092                                   NL80211_FLAG_NEED_RTNL,
10093         },
10094         {
10095                 .cmd = NL80211_CMD_SET_KEY,
10096                 .doit = nl80211_set_key,
10097                 .policy = nl80211_policy,
10098                 .flags = GENL_ADMIN_PERM,
10099                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10100                                   NL80211_FLAG_NEED_RTNL |
10101                                   NL80211_FLAG_CLEAR_SKB,
10102         },
10103         {
10104                 .cmd = NL80211_CMD_NEW_KEY,
10105                 .doit = nl80211_new_key,
10106                 .policy = nl80211_policy,
10107                 .flags = GENL_ADMIN_PERM,
10108                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10109                                   NL80211_FLAG_NEED_RTNL |
10110                                   NL80211_FLAG_CLEAR_SKB,
10111         },
10112         {
10113                 .cmd = NL80211_CMD_DEL_KEY,
10114                 .doit = nl80211_del_key,
10115                 .policy = nl80211_policy,
10116                 .flags = GENL_ADMIN_PERM,
10117                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10118                                   NL80211_FLAG_NEED_RTNL,
10119         },
10120         {
10121                 .cmd = NL80211_CMD_SET_BEACON,
10122                 .policy = nl80211_policy,
10123                 .flags = GENL_ADMIN_PERM,
10124                 .doit = nl80211_set_beacon,
10125                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10126                                   NL80211_FLAG_NEED_RTNL,
10127         },
10128         {
10129                 .cmd = NL80211_CMD_START_AP,
10130                 .policy = nl80211_policy,
10131                 .flags = GENL_ADMIN_PERM,
10132                 .doit = nl80211_start_ap,
10133                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10134                                   NL80211_FLAG_NEED_RTNL,
10135         },
10136         {
10137                 .cmd = NL80211_CMD_STOP_AP,
10138                 .policy = nl80211_policy,
10139                 .flags = GENL_ADMIN_PERM,
10140                 .doit = nl80211_stop_ap,
10141                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10142                                   NL80211_FLAG_NEED_RTNL,
10143         },
10144         {
10145                 .cmd = NL80211_CMD_GET_STATION,
10146                 .doit = nl80211_get_station,
10147                 .dumpit = nl80211_dump_station,
10148                 .policy = nl80211_policy,
10149                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10150                                   NL80211_FLAG_NEED_RTNL,
10151         },
10152         {
10153                 .cmd = NL80211_CMD_SET_STATION,
10154                 .doit = nl80211_set_station,
10155                 .policy = nl80211_policy,
10156                 .flags = GENL_ADMIN_PERM,
10157                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10158                                   NL80211_FLAG_NEED_RTNL,
10159         },
10160         {
10161                 .cmd = NL80211_CMD_NEW_STATION,
10162                 .doit = nl80211_new_station,
10163                 .policy = nl80211_policy,
10164                 .flags = GENL_ADMIN_PERM,
10165                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10166                                   NL80211_FLAG_NEED_RTNL,
10167         },
10168         {
10169                 .cmd = NL80211_CMD_DEL_STATION,
10170                 .doit = nl80211_del_station,
10171                 .policy = nl80211_policy,
10172                 .flags = GENL_ADMIN_PERM,
10173                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10174                                   NL80211_FLAG_NEED_RTNL,
10175         },
10176         {
10177                 .cmd = NL80211_CMD_GET_MPATH,
10178                 .doit = nl80211_get_mpath,
10179                 .dumpit = nl80211_dump_mpath,
10180                 .policy = nl80211_policy,
10181                 .flags = GENL_ADMIN_PERM,
10182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10183                                   NL80211_FLAG_NEED_RTNL,
10184         },
10185         {
10186                 .cmd = NL80211_CMD_GET_MPP,
10187                 .doit = nl80211_get_mpp,
10188                 .dumpit = nl80211_dump_mpp,
10189                 .policy = nl80211_policy,
10190                 .flags = GENL_ADMIN_PERM,
10191                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10192                                   NL80211_FLAG_NEED_RTNL,
10193         },
10194         {
10195                 .cmd = NL80211_CMD_SET_MPATH,
10196                 .doit = nl80211_set_mpath,
10197                 .policy = nl80211_policy,
10198                 .flags = GENL_ADMIN_PERM,
10199                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10200                                   NL80211_FLAG_NEED_RTNL,
10201         },
10202         {
10203                 .cmd = NL80211_CMD_NEW_MPATH,
10204                 .doit = nl80211_new_mpath,
10205                 .policy = nl80211_policy,
10206                 .flags = GENL_ADMIN_PERM,
10207                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10208                                   NL80211_FLAG_NEED_RTNL,
10209         },
10210         {
10211                 .cmd = NL80211_CMD_DEL_MPATH,
10212                 .doit = nl80211_del_mpath,
10213                 .policy = nl80211_policy,
10214                 .flags = GENL_ADMIN_PERM,
10215                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10216                                   NL80211_FLAG_NEED_RTNL,
10217         },
10218         {
10219                 .cmd = NL80211_CMD_SET_BSS,
10220                 .doit = nl80211_set_bss,
10221                 .policy = nl80211_policy,
10222                 .flags = GENL_ADMIN_PERM,
10223                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10224                                   NL80211_FLAG_NEED_RTNL,
10225         },
10226         {
10227                 .cmd = NL80211_CMD_GET_REG,
10228                 .doit = nl80211_get_reg,
10229                 .policy = nl80211_policy,
10230                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10231                 /* can be retrieved by unprivileged users */
10232         },
10233         {
10234                 .cmd = NL80211_CMD_SET_REG,
10235                 .doit = nl80211_set_reg,
10236                 .policy = nl80211_policy,
10237                 .flags = GENL_ADMIN_PERM,
10238                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10239         },
10240         {
10241                 .cmd = NL80211_CMD_REQ_SET_REG,
10242                 .doit = nl80211_req_set_reg,
10243                 .policy = nl80211_policy,
10244                 .flags = GENL_ADMIN_PERM,
10245         },
10246         {
10247                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
10248                 .doit = nl80211_get_mesh_config,
10249                 .policy = nl80211_policy,
10250                 /* can be retrieved by unprivileged users */
10251                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10252                                   NL80211_FLAG_NEED_RTNL,
10253         },
10254         {
10255                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
10256                 .doit = nl80211_update_mesh_config,
10257                 .policy = nl80211_policy,
10258                 .flags = GENL_ADMIN_PERM,
10259                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10260                                   NL80211_FLAG_NEED_RTNL,
10261         },
10262         {
10263                 .cmd = NL80211_CMD_TRIGGER_SCAN,
10264                 .doit = nl80211_trigger_scan,
10265                 .policy = nl80211_policy,
10266                 .flags = GENL_ADMIN_PERM,
10267                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10268                                   NL80211_FLAG_NEED_RTNL,
10269         },
10270         {
10271                 .cmd = NL80211_CMD_GET_SCAN,
10272                 .policy = nl80211_policy,
10273                 .dumpit = nl80211_dump_scan,
10274         },
10275         {
10276                 .cmd = NL80211_CMD_START_SCHED_SCAN,
10277                 .doit = nl80211_start_sched_scan,
10278                 .policy = nl80211_policy,
10279                 .flags = GENL_ADMIN_PERM,
10280                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10281                                   NL80211_FLAG_NEED_RTNL,
10282         },
10283         {
10284                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
10285                 .doit = nl80211_stop_sched_scan,
10286                 .policy = nl80211_policy,
10287                 .flags = GENL_ADMIN_PERM,
10288                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10289                                   NL80211_FLAG_NEED_RTNL,
10290         },
10291         {
10292                 .cmd = NL80211_CMD_AUTHENTICATE,
10293                 .doit = nl80211_authenticate,
10294                 .policy = nl80211_policy,
10295                 .flags = GENL_ADMIN_PERM,
10296                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10297                                   NL80211_FLAG_NEED_RTNL |
10298                                   NL80211_FLAG_CLEAR_SKB,
10299         },
10300         {
10301                 .cmd = NL80211_CMD_ASSOCIATE,
10302                 .doit = nl80211_associate,
10303                 .policy = nl80211_policy,
10304                 .flags = GENL_ADMIN_PERM,
10305                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10306                                   NL80211_FLAG_NEED_RTNL,
10307         },
10308         {
10309                 .cmd = NL80211_CMD_DEAUTHENTICATE,
10310                 .doit = nl80211_deauthenticate,
10311                 .policy = nl80211_policy,
10312                 .flags = GENL_ADMIN_PERM,
10313                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10314                                   NL80211_FLAG_NEED_RTNL,
10315         },
10316         {
10317                 .cmd = NL80211_CMD_DISASSOCIATE,
10318                 .doit = nl80211_disassociate,
10319                 .policy = nl80211_policy,
10320                 .flags = GENL_ADMIN_PERM,
10321                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10322                                   NL80211_FLAG_NEED_RTNL,
10323         },
10324         {
10325                 .cmd = NL80211_CMD_JOIN_IBSS,
10326                 .doit = nl80211_join_ibss,
10327                 .policy = nl80211_policy,
10328                 .flags = GENL_ADMIN_PERM,
10329                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10330                                   NL80211_FLAG_NEED_RTNL,
10331         },
10332         {
10333                 .cmd = NL80211_CMD_LEAVE_IBSS,
10334                 .doit = nl80211_leave_ibss,
10335                 .policy = nl80211_policy,
10336                 .flags = GENL_ADMIN_PERM,
10337                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10338                                   NL80211_FLAG_NEED_RTNL,
10339         },
10340 #ifdef CONFIG_NL80211_TESTMODE
10341         {
10342                 .cmd = NL80211_CMD_TESTMODE,
10343                 .doit = nl80211_testmode_do,
10344                 .dumpit = nl80211_testmode_dump,
10345                 .policy = nl80211_policy,
10346                 .flags = GENL_ADMIN_PERM,
10347                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10348                                   NL80211_FLAG_NEED_RTNL,
10349         },
10350 #endif
10351         {
10352                 .cmd = NL80211_CMD_CONNECT,
10353                 .doit = nl80211_connect,
10354                 .policy = nl80211_policy,
10355                 .flags = GENL_ADMIN_PERM,
10356                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10357                                   NL80211_FLAG_NEED_RTNL,
10358         },
10359         {
10360                 .cmd = NL80211_CMD_DISCONNECT,
10361                 .doit = nl80211_disconnect,
10362                 .policy = nl80211_policy,
10363                 .flags = GENL_ADMIN_PERM,
10364                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10365                                   NL80211_FLAG_NEED_RTNL,
10366         },
10367         {
10368                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
10369                 .doit = nl80211_wiphy_netns,
10370                 .policy = nl80211_policy,
10371                 .flags = GENL_ADMIN_PERM,
10372                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10373                                   NL80211_FLAG_NEED_RTNL,
10374         },
10375         {
10376                 .cmd = NL80211_CMD_GET_SURVEY,
10377                 .policy = nl80211_policy,
10378                 .dumpit = nl80211_dump_survey,
10379         },
10380         {
10381                 .cmd = NL80211_CMD_SET_PMKSA,
10382                 .doit = nl80211_setdel_pmksa,
10383                 .policy = nl80211_policy,
10384                 .flags = GENL_ADMIN_PERM,
10385                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10386                                   NL80211_FLAG_NEED_RTNL,
10387         },
10388         {
10389                 .cmd = NL80211_CMD_DEL_PMKSA,
10390                 .doit = nl80211_setdel_pmksa,
10391                 .policy = nl80211_policy,
10392                 .flags = GENL_ADMIN_PERM,
10393                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10394                                   NL80211_FLAG_NEED_RTNL,
10395         },
10396         {
10397                 .cmd = NL80211_CMD_FLUSH_PMKSA,
10398                 .doit = nl80211_flush_pmksa,
10399                 .policy = nl80211_policy,
10400                 .flags = GENL_ADMIN_PERM,
10401                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10402                                   NL80211_FLAG_NEED_RTNL,
10403         },
10404         {
10405                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
10406                 .doit = nl80211_remain_on_channel,
10407                 .policy = nl80211_policy,
10408                 .flags = GENL_ADMIN_PERM,
10409                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10410                                   NL80211_FLAG_NEED_RTNL,
10411         },
10412         {
10413                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10414                 .doit = nl80211_cancel_remain_on_channel,
10415                 .policy = nl80211_policy,
10416                 .flags = GENL_ADMIN_PERM,
10417                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10418                                   NL80211_FLAG_NEED_RTNL,
10419         },
10420         {
10421                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
10422                 .doit = nl80211_set_tx_bitrate_mask,
10423                 .policy = nl80211_policy,
10424                 .flags = GENL_ADMIN_PERM,
10425                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10426                                   NL80211_FLAG_NEED_RTNL,
10427         },
10428         {
10429                 .cmd = NL80211_CMD_REGISTER_FRAME,
10430                 .doit = nl80211_register_mgmt,
10431                 .policy = nl80211_policy,
10432                 .flags = GENL_ADMIN_PERM,
10433                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10434                                   NL80211_FLAG_NEED_RTNL,
10435         },
10436         {
10437                 .cmd = NL80211_CMD_FRAME,
10438                 .doit = nl80211_tx_mgmt,
10439                 .policy = nl80211_policy,
10440                 .flags = GENL_ADMIN_PERM,
10441                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10442                                   NL80211_FLAG_NEED_RTNL,
10443         },
10444         {
10445                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
10446                 .doit = nl80211_tx_mgmt_cancel_wait,
10447                 .policy = nl80211_policy,
10448                 .flags = GENL_ADMIN_PERM,
10449                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10450                                   NL80211_FLAG_NEED_RTNL,
10451         },
10452         {
10453                 .cmd = NL80211_CMD_SET_POWER_SAVE,
10454                 .doit = nl80211_set_power_save,
10455                 .policy = nl80211_policy,
10456                 .flags = GENL_ADMIN_PERM,
10457                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10458                                   NL80211_FLAG_NEED_RTNL,
10459         },
10460         {
10461                 .cmd = NL80211_CMD_GET_POWER_SAVE,
10462                 .doit = nl80211_get_power_save,
10463                 .policy = nl80211_policy,
10464                 /* can be retrieved by unprivileged users */
10465                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10466                                   NL80211_FLAG_NEED_RTNL,
10467         },
10468         {
10469                 .cmd = NL80211_CMD_SET_CQM,
10470                 .doit = nl80211_set_cqm,
10471                 .policy = nl80211_policy,
10472                 .flags = GENL_ADMIN_PERM,
10473                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10474                                   NL80211_FLAG_NEED_RTNL,
10475         },
10476         {
10477                 .cmd = NL80211_CMD_SET_CHANNEL,
10478                 .doit = nl80211_set_channel,
10479                 .policy = nl80211_policy,
10480                 .flags = GENL_ADMIN_PERM,
10481                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10482                                   NL80211_FLAG_NEED_RTNL,
10483         },
10484         {
10485                 .cmd = NL80211_CMD_SET_WDS_PEER,
10486                 .doit = nl80211_set_wds_peer,
10487                 .policy = nl80211_policy,
10488                 .flags = GENL_ADMIN_PERM,
10489                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10490                                   NL80211_FLAG_NEED_RTNL,
10491         },
10492         {
10493                 .cmd = NL80211_CMD_JOIN_MESH,
10494                 .doit = nl80211_join_mesh,
10495                 .policy = nl80211_policy,
10496                 .flags = GENL_ADMIN_PERM,
10497                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10498                                   NL80211_FLAG_NEED_RTNL,
10499         },
10500         {
10501                 .cmd = NL80211_CMD_LEAVE_MESH,
10502                 .doit = nl80211_leave_mesh,
10503                 .policy = nl80211_policy,
10504                 .flags = GENL_ADMIN_PERM,
10505                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10506                                   NL80211_FLAG_NEED_RTNL,
10507         },
10508         {
10509                 .cmd = NL80211_CMD_JOIN_OCB,
10510                 .doit = nl80211_join_ocb,
10511                 .policy = nl80211_policy,
10512                 .flags = GENL_ADMIN_PERM,
10513                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10514                                   NL80211_FLAG_NEED_RTNL,
10515         },
10516         {
10517                 .cmd = NL80211_CMD_LEAVE_OCB,
10518                 .doit = nl80211_leave_ocb,
10519                 .policy = nl80211_policy,
10520                 .flags = GENL_ADMIN_PERM,
10521                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10522                                   NL80211_FLAG_NEED_RTNL,
10523         },
10524 #ifdef CONFIG_PM
10525         {
10526                 .cmd = NL80211_CMD_GET_WOWLAN,
10527                 .doit = nl80211_get_wowlan,
10528                 .policy = nl80211_policy,
10529                 /* can be retrieved by unprivileged users */
10530                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10531                                   NL80211_FLAG_NEED_RTNL,
10532         },
10533         {
10534                 .cmd = NL80211_CMD_SET_WOWLAN,
10535                 .doit = nl80211_set_wowlan,
10536                 .policy = nl80211_policy,
10537                 .flags = GENL_ADMIN_PERM,
10538                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10539                                   NL80211_FLAG_NEED_RTNL,
10540         },
10541 #endif
10542         {
10543                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
10544                 .doit = nl80211_set_rekey_data,
10545                 .policy = nl80211_policy,
10546                 .flags = GENL_ADMIN_PERM,
10547                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10548                                   NL80211_FLAG_NEED_RTNL |
10549                                   NL80211_FLAG_CLEAR_SKB,
10550         },
10551         {
10552                 .cmd = NL80211_CMD_TDLS_MGMT,
10553                 .doit = nl80211_tdls_mgmt,
10554                 .policy = nl80211_policy,
10555                 .flags = GENL_ADMIN_PERM,
10556                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10557                                   NL80211_FLAG_NEED_RTNL,
10558         },
10559         {
10560                 .cmd = NL80211_CMD_TDLS_OPER,
10561                 .doit = nl80211_tdls_oper,
10562                 .policy = nl80211_policy,
10563                 .flags = GENL_ADMIN_PERM,
10564                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10565                                   NL80211_FLAG_NEED_RTNL,
10566         },
10567         {
10568                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
10569                 .doit = nl80211_register_unexpected_frame,
10570                 .policy = nl80211_policy,
10571                 .flags = GENL_ADMIN_PERM,
10572                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10573                                   NL80211_FLAG_NEED_RTNL,
10574         },
10575         {
10576                 .cmd = NL80211_CMD_PROBE_CLIENT,
10577                 .doit = nl80211_probe_client,
10578                 .policy = nl80211_policy,
10579                 .flags = GENL_ADMIN_PERM,
10580                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10581                                   NL80211_FLAG_NEED_RTNL,
10582         },
10583         {
10584                 .cmd = NL80211_CMD_REGISTER_BEACONS,
10585                 .doit = nl80211_register_beacons,
10586                 .policy = nl80211_policy,
10587                 .flags = GENL_ADMIN_PERM,
10588                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10589                                   NL80211_FLAG_NEED_RTNL,
10590         },
10591         {
10592                 .cmd = NL80211_CMD_SET_NOACK_MAP,
10593                 .doit = nl80211_set_noack_map,
10594                 .policy = nl80211_policy,
10595                 .flags = GENL_ADMIN_PERM,
10596                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10597                                   NL80211_FLAG_NEED_RTNL,
10598         },
10599         {
10600                 .cmd = NL80211_CMD_START_P2P_DEVICE,
10601                 .doit = nl80211_start_p2p_device,
10602                 .policy = nl80211_policy,
10603                 .flags = GENL_ADMIN_PERM,
10604                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10605                                   NL80211_FLAG_NEED_RTNL,
10606         },
10607         {
10608                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
10609                 .doit = nl80211_stop_p2p_device,
10610                 .policy = nl80211_policy,
10611                 .flags = GENL_ADMIN_PERM,
10612                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10613                                   NL80211_FLAG_NEED_RTNL,
10614         },
10615         {
10616                 .cmd = NL80211_CMD_SET_MCAST_RATE,
10617                 .doit = nl80211_set_mcast_rate,
10618                 .policy = nl80211_policy,
10619                 .flags = GENL_ADMIN_PERM,
10620                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10621                                   NL80211_FLAG_NEED_RTNL,
10622         },
10623         {
10624                 .cmd = NL80211_CMD_SET_MAC_ACL,
10625                 .doit = nl80211_set_mac_acl,
10626                 .policy = nl80211_policy,
10627                 .flags = GENL_ADMIN_PERM,
10628                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10629                                   NL80211_FLAG_NEED_RTNL,
10630         },
10631         {
10632                 .cmd = NL80211_CMD_RADAR_DETECT,
10633                 .doit = nl80211_start_radar_detection,
10634                 .policy = nl80211_policy,
10635                 .flags = GENL_ADMIN_PERM,
10636                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10637                                   NL80211_FLAG_NEED_RTNL,
10638         },
10639         {
10640                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
10641                 .doit = nl80211_get_protocol_features,
10642                 .policy = nl80211_policy,
10643         },
10644         {
10645                 .cmd = NL80211_CMD_UPDATE_FT_IES,
10646                 .doit = nl80211_update_ft_ies,
10647                 .policy = nl80211_policy,
10648                 .flags = GENL_ADMIN_PERM,
10649                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10650                                   NL80211_FLAG_NEED_RTNL,
10651         },
10652         {
10653                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
10654                 .doit = nl80211_crit_protocol_start,
10655                 .policy = nl80211_policy,
10656                 .flags = GENL_ADMIN_PERM,
10657                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10658                                   NL80211_FLAG_NEED_RTNL,
10659         },
10660         {
10661                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
10662                 .doit = nl80211_crit_protocol_stop,
10663                 .policy = nl80211_policy,
10664                 .flags = GENL_ADMIN_PERM,
10665                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
10666                                   NL80211_FLAG_NEED_RTNL,
10667         },
10668         {
10669                 .cmd = NL80211_CMD_GET_COALESCE,
10670                 .doit = nl80211_get_coalesce,
10671                 .policy = nl80211_policy,
10672                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10673                                   NL80211_FLAG_NEED_RTNL,
10674         },
10675         {
10676                 .cmd = NL80211_CMD_SET_COALESCE,
10677                 .doit = nl80211_set_coalesce,
10678                 .policy = nl80211_policy,
10679                 .flags = GENL_ADMIN_PERM,
10680                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10681                                   NL80211_FLAG_NEED_RTNL,
10682         },
10683         {
10684                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
10685                 .doit = nl80211_channel_switch,
10686                 .policy = nl80211_policy,
10687                 .flags = GENL_ADMIN_PERM,
10688                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10689                                   NL80211_FLAG_NEED_RTNL,
10690         },
10691         {
10692                 .cmd = NL80211_CMD_VENDOR,
10693                 .doit = nl80211_vendor_cmd,
10694                 .policy = nl80211_policy,
10695                 .flags = GENL_ADMIN_PERM,
10696                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10697                                   NL80211_FLAG_NEED_RTNL,
10698         },
10699         {
10700                 .cmd = NL80211_CMD_SET_QOS_MAP,
10701                 .doit = nl80211_set_qos_map,
10702                 .policy = nl80211_policy,
10703                 .flags = GENL_ADMIN_PERM,
10704                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10705                                   NL80211_FLAG_NEED_RTNL,
10706         },
10707         {
10708                 .cmd = NL80211_CMD_ADD_TX_TS,
10709                 .doit = nl80211_add_tx_ts,
10710                 .policy = nl80211_policy,
10711                 .flags = GENL_ADMIN_PERM,
10712                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10713                                   NL80211_FLAG_NEED_RTNL,
10714         },
10715         {
10716                 .cmd = NL80211_CMD_DEL_TX_TS,
10717                 .doit = nl80211_del_tx_ts,
10718                 .policy = nl80211_policy,
10719                 .flags = GENL_ADMIN_PERM,
10720                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10721                                   NL80211_FLAG_NEED_RTNL,
10722         },
10723         {
10724                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
10725                 .doit = nl80211_tdls_channel_switch,
10726                 .policy = nl80211_policy,
10727                 .flags = GENL_ADMIN_PERM,
10728                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10729                                   NL80211_FLAG_NEED_RTNL,
10730         },
10731         {
10732                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
10733                 .doit = nl80211_tdls_cancel_channel_switch,
10734                 .policy = nl80211_policy,
10735                 .flags = GENL_ADMIN_PERM,
10736                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10737                                   NL80211_FLAG_NEED_RTNL,
10738         },
10739 };
10740
10741 /* notification functions */
10742
10743 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
10744                           enum nl80211_commands cmd)
10745 {
10746         struct sk_buff *msg;
10747         struct nl80211_dump_wiphy_state state = {};
10748
10749         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
10750                 cmd != NL80211_CMD_DEL_WIPHY);
10751
10752         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10753         if (!msg)
10754                 return;
10755
10756         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
10757                 nlmsg_free(msg);
10758                 return;
10759         }
10760
10761         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10762                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
10763 }
10764
10765 static int nl80211_add_scan_req(struct sk_buff *msg,
10766                                 struct cfg80211_registered_device *rdev)
10767 {
10768         struct cfg80211_scan_request *req = rdev->scan_req;
10769         struct nlattr *nest;
10770         int i;
10771
10772         if (WARN_ON(!req))
10773                 return 0;
10774
10775         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
10776         if (!nest)
10777                 goto nla_put_failure;
10778         for (i = 0; i < req->n_ssids; i++) {
10779                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
10780                         goto nla_put_failure;
10781         }
10782         nla_nest_end(msg, nest);
10783
10784         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10785         if (!nest)
10786                 goto nla_put_failure;
10787         for (i = 0; i < req->n_channels; i++) {
10788                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10789                         goto nla_put_failure;
10790         }
10791         nla_nest_end(msg, nest);
10792
10793         if (req->ie &&
10794             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
10795                 goto nla_put_failure;
10796
10797         if (req->flags &&
10798             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
10799                 goto nla_put_failure;
10800
10801         return 0;
10802  nla_put_failure:
10803         return -ENOBUFS;
10804 }
10805
10806 static int nl80211_send_scan_msg(struct sk_buff *msg,
10807                                  struct cfg80211_registered_device *rdev,
10808                                  struct wireless_dev *wdev,
10809                                  u32 portid, u32 seq, int flags,
10810                                  u32 cmd)
10811 {
10812         void *hdr;
10813
10814         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10815         if (!hdr)
10816                 return -1;
10817
10818         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10819             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10820                                          wdev->netdev->ifindex)) ||
10821             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10822                 goto nla_put_failure;
10823
10824         /* ignore errors and send incomplete event anyway */
10825         nl80211_add_scan_req(msg, rdev);
10826
10827         return genlmsg_end(msg, hdr);
10828
10829  nla_put_failure:
10830         genlmsg_cancel(msg, hdr);
10831         return -EMSGSIZE;
10832 }
10833
10834 static int
10835 nl80211_send_sched_scan_msg(struct sk_buff *msg,
10836                             struct cfg80211_registered_device *rdev,
10837                             struct net_device *netdev,
10838                             u32 portid, u32 seq, int flags, u32 cmd)
10839 {
10840         void *hdr;
10841
10842         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
10843         if (!hdr)
10844                 return -1;
10845
10846         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10847             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10848                 goto nla_put_failure;
10849
10850         return genlmsg_end(msg, hdr);
10851
10852  nla_put_failure:
10853         genlmsg_cancel(msg, hdr);
10854         return -EMSGSIZE;
10855 }
10856
10857 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
10858                              struct wireless_dev *wdev)
10859 {
10860         struct sk_buff *msg;
10861
10862         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10863         if (!msg)
10864                 return;
10865
10866         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10867                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
10868                 nlmsg_free(msg);
10869                 return;
10870         }
10871
10872         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10873                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10874 }
10875
10876 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
10877                                        struct wireless_dev *wdev, bool aborted)
10878 {
10879         struct sk_buff *msg;
10880
10881         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10882         if (!msg)
10883                 return NULL;
10884
10885         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
10886                                   aborted ? NL80211_CMD_SCAN_ABORTED :
10887                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
10888                 nlmsg_free(msg);
10889                 return NULL;
10890         }
10891
10892         return msg;
10893 }
10894
10895 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
10896                               struct sk_buff *msg)
10897 {
10898         if (!msg)
10899                 return;
10900
10901         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10902                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10903 }
10904
10905 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
10906                                      struct net_device *netdev)
10907 {
10908         struct sk_buff *msg;
10909
10910         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10911         if (!msg)
10912                 return;
10913
10914         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
10915                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
10916                 nlmsg_free(msg);
10917                 return;
10918         }
10919
10920         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10921                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10922 }
10923
10924 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
10925                              struct net_device *netdev, u32 cmd)
10926 {
10927         struct sk_buff *msg;
10928
10929         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10930         if (!msg)
10931                 return;
10932
10933         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
10934                 nlmsg_free(msg);
10935                 return;
10936         }
10937
10938         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10939                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
10940 }
10941
10942 /*
10943  * This can happen on global regulatory changes or device specific settings
10944  * based on custom world regulatory domains.
10945  */
10946 void nl80211_send_reg_change_event(struct regulatory_request *request)
10947 {
10948         struct sk_buff *msg;
10949         void *hdr;
10950
10951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10952         if (!msg)
10953                 return;
10954
10955         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
10956         if (!hdr) {
10957                 nlmsg_free(msg);
10958                 return;
10959         }
10960
10961         /* Userspace can always count this one always being set */
10962         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
10963                 goto nla_put_failure;
10964
10965         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
10966                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10967                                NL80211_REGDOM_TYPE_WORLD))
10968                         goto nla_put_failure;
10969         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
10970                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10971                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
10972                         goto nla_put_failure;
10973         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
10974                    request->intersect) {
10975                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10976                                NL80211_REGDOM_TYPE_INTERSECTION))
10977                         goto nla_put_failure;
10978         } else {
10979                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
10980                                NL80211_REGDOM_TYPE_COUNTRY) ||
10981                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
10982                                    request->alpha2))
10983                         goto nla_put_failure;
10984         }
10985
10986         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
10987             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
10988                 goto nla_put_failure;
10989
10990         genlmsg_end(msg, hdr);
10991
10992         rcu_read_lock();
10993         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10994                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10995         rcu_read_unlock();
10996
10997         return;
10998
10999 nla_put_failure:
11000         genlmsg_cancel(msg, hdr);
11001         nlmsg_free(msg);
11002 }
11003
11004 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11005                                     struct net_device *netdev,
11006                                     const u8 *buf, size_t len,
11007                                     enum nl80211_commands cmd, gfp_t gfp,
11008                                     int uapsd_queues)
11009 {
11010         struct sk_buff *msg;
11011         void *hdr;
11012
11013         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11014         if (!msg)
11015                 return;
11016
11017         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11018         if (!hdr) {
11019                 nlmsg_free(msg);
11020                 return;
11021         }
11022
11023         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11024             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11025             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11026                 goto nla_put_failure;
11027
11028         if (uapsd_queues >= 0) {
11029                 struct nlattr *nla_wmm =
11030                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11031                 if (!nla_wmm)
11032                         goto nla_put_failure;
11033
11034                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11035                                uapsd_queues))
11036                         goto nla_put_failure;
11037
11038                 nla_nest_end(msg, nla_wmm);
11039         }
11040
11041         genlmsg_end(msg, hdr);
11042
11043         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11044                                 NL80211_MCGRP_MLME, gfp);
11045         return;
11046
11047  nla_put_failure:
11048         genlmsg_cancel(msg, hdr);
11049         nlmsg_free(msg);
11050 }
11051
11052 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11053                           struct net_device *netdev, const u8 *buf,
11054                           size_t len, gfp_t gfp)
11055 {
11056         nl80211_send_mlme_event(rdev, netdev, buf, len,
11057                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11058 }
11059
11060 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11061                            struct net_device *netdev, const u8 *buf,
11062                            size_t len, gfp_t gfp, int uapsd_queues)
11063 {
11064         nl80211_send_mlme_event(rdev, netdev, buf, len,
11065                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11066 }
11067
11068 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11069                          struct net_device *netdev, const u8 *buf,
11070                          size_t len, gfp_t gfp)
11071 {
11072         nl80211_send_mlme_event(rdev, netdev, buf, len,
11073                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11074 }
11075
11076 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11077                            struct net_device *netdev, const u8 *buf,
11078                            size_t len, gfp_t gfp)
11079 {
11080         nl80211_send_mlme_event(rdev, netdev, buf, len,
11081                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11082 }
11083
11084 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11085                                   size_t len)
11086 {
11087         struct wireless_dev *wdev = dev->ieee80211_ptr;
11088         struct wiphy *wiphy = wdev->wiphy;
11089         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11090         const struct ieee80211_mgmt *mgmt = (void *)buf;
11091         u32 cmd;
11092
11093         if (WARN_ON(len < 2))
11094                 return;
11095
11096         if (ieee80211_is_deauth(mgmt->frame_control))
11097                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11098         else
11099                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11100
11101         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11102         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11103 }
11104 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11105
11106 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11107                                       struct net_device *netdev, int cmd,
11108                                       const u8 *addr, gfp_t gfp)
11109 {
11110         struct sk_buff *msg;
11111         void *hdr;
11112
11113         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11114         if (!msg)
11115                 return;
11116
11117         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11118         if (!hdr) {
11119                 nlmsg_free(msg);
11120                 return;
11121         }
11122
11123         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11124             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11125             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
11126             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11127                 goto nla_put_failure;
11128
11129         genlmsg_end(msg, hdr);
11130
11131         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11132                                 NL80211_MCGRP_MLME, gfp);
11133         return;
11134
11135  nla_put_failure:
11136         genlmsg_cancel(msg, hdr);
11137         nlmsg_free(msg);
11138 }
11139
11140 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
11141                                struct net_device *netdev, const u8 *addr,
11142                                gfp_t gfp)
11143 {
11144         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
11145                                   addr, gfp);
11146 }
11147
11148 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
11149                                 struct net_device *netdev, const u8 *addr,
11150                                 gfp_t gfp)
11151 {
11152         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
11153                                   addr, gfp);
11154 }
11155
11156 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
11157                                  struct net_device *netdev, const u8 *bssid,
11158                                  const u8 *req_ie, size_t req_ie_len,
11159                                  const u8 *resp_ie, size_t resp_ie_len,
11160                                  u16 status, gfp_t gfp)
11161 {
11162         struct sk_buff *msg;
11163         void *hdr;
11164
11165         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11166         if (!msg)
11167                 return;
11168
11169         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
11170         if (!hdr) {
11171                 nlmsg_free(msg);
11172                 return;
11173         }
11174
11175         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11176             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11177             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
11178             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
11179             (req_ie &&
11180              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11181             (resp_ie &&
11182              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11183                 goto nla_put_failure;
11184
11185         genlmsg_end(msg, hdr);
11186
11187         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11188                                 NL80211_MCGRP_MLME, gfp);
11189         return;
11190
11191  nla_put_failure:
11192         genlmsg_cancel(msg, hdr);
11193         nlmsg_free(msg);
11194
11195 }
11196
11197 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
11198                          struct net_device *netdev, const u8 *bssid,
11199                          const u8 *req_ie, size_t req_ie_len,
11200                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
11201 {
11202         struct sk_buff *msg;
11203         void *hdr;
11204
11205         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11206         if (!msg)
11207                 return;
11208
11209         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
11210         if (!hdr) {
11211                 nlmsg_free(msg);
11212                 return;
11213         }
11214
11215         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11216             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11217             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
11218             (req_ie &&
11219              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11220             (resp_ie &&
11221              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11222                 goto nla_put_failure;
11223
11224         genlmsg_end(msg, hdr);
11225
11226         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11227                                 NL80211_MCGRP_MLME, gfp);
11228         return;
11229
11230  nla_put_failure:
11231         genlmsg_cancel(msg, hdr);
11232         nlmsg_free(msg);
11233
11234 }
11235
11236 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
11237                                struct net_device *netdev, u16 reason,
11238                                const u8 *ie, size_t ie_len, bool from_ap)
11239 {
11240         struct sk_buff *msg;
11241         void *hdr;
11242
11243         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11244         if (!msg)
11245                 return;
11246
11247         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
11248         if (!hdr) {
11249                 nlmsg_free(msg);
11250                 return;
11251         }
11252
11253         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11254             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11255             (from_ap && reason &&
11256              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
11257             (from_ap &&
11258              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
11259             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
11260                 goto nla_put_failure;
11261
11262         genlmsg_end(msg, hdr);
11263
11264         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11265                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11266         return;
11267
11268  nla_put_failure:
11269         genlmsg_cancel(msg, hdr);
11270         nlmsg_free(msg);
11271
11272 }
11273
11274 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
11275                              struct net_device *netdev, const u8 *bssid,
11276                              gfp_t gfp)
11277 {
11278         struct sk_buff *msg;
11279         void *hdr;
11280
11281         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11282         if (!msg)
11283                 return;
11284
11285         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
11286         if (!hdr) {
11287                 nlmsg_free(msg);
11288                 return;
11289         }
11290
11291         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11292             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11293             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11294                 goto nla_put_failure;
11295
11296         genlmsg_end(msg, hdr);
11297
11298         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11299                                 NL80211_MCGRP_MLME, gfp);
11300         return;
11301
11302  nla_put_failure:
11303         genlmsg_cancel(msg, hdr);
11304         nlmsg_free(msg);
11305 }
11306
11307 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
11308                                         const u8* ie, u8 ie_len, gfp_t gfp)
11309 {
11310         struct wireless_dev *wdev = dev->ieee80211_ptr;
11311         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11312         struct sk_buff *msg;
11313         void *hdr;
11314
11315         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
11316                 return;
11317
11318         trace_cfg80211_notify_new_peer_candidate(dev, addr);
11319
11320         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11321         if (!msg)
11322                 return;
11323
11324         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
11325         if (!hdr) {
11326                 nlmsg_free(msg);
11327                 return;
11328         }
11329
11330         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11331             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11332             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11333             (ie_len && ie &&
11334              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
11335                 goto nla_put_failure;
11336
11337         genlmsg_end(msg, hdr);
11338
11339         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11340                                 NL80211_MCGRP_MLME, gfp);
11341         return;
11342
11343  nla_put_failure:
11344         genlmsg_cancel(msg, hdr);
11345         nlmsg_free(msg);
11346 }
11347 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
11348
11349 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
11350                                  struct net_device *netdev, const u8 *addr,
11351                                  enum nl80211_key_type key_type, int key_id,
11352                                  const u8 *tsc, gfp_t gfp)
11353 {
11354         struct sk_buff *msg;
11355         void *hdr;
11356
11357         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11358         if (!msg)
11359                 return;
11360
11361         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
11362         if (!hdr) {
11363                 nlmsg_free(msg);
11364                 return;
11365         }
11366
11367         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11368             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11369             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
11370             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
11371             (key_id != -1 &&
11372              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
11373             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
11374                 goto nla_put_failure;
11375
11376         genlmsg_end(msg, hdr);
11377
11378         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11379                                 NL80211_MCGRP_MLME, gfp);
11380         return;
11381
11382  nla_put_failure:
11383         genlmsg_cancel(msg, hdr);
11384         nlmsg_free(msg);
11385 }
11386
11387 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
11388                                     struct ieee80211_channel *channel_before,
11389                                     struct ieee80211_channel *channel_after)
11390 {
11391         struct sk_buff *msg;
11392         void *hdr;
11393         struct nlattr *nl_freq;
11394
11395         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
11396         if (!msg)
11397                 return;
11398
11399         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
11400         if (!hdr) {
11401                 nlmsg_free(msg);
11402                 return;
11403         }
11404
11405         /*
11406          * Since we are applying the beacon hint to a wiphy we know its
11407          * wiphy_idx is valid
11408          */
11409         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
11410                 goto nla_put_failure;
11411
11412         /* Before */
11413         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
11414         if (!nl_freq)
11415                 goto nla_put_failure;
11416         if (nl80211_msg_put_channel(msg, channel_before, false))
11417                 goto nla_put_failure;
11418         nla_nest_end(msg, nl_freq);
11419
11420         /* After */
11421         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
11422         if (!nl_freq)
11423                 goto nla_put_failure;
11424         if (nl80211_msg_put_channel(msg, channel_after, false))
11425                 goto nla_put_failure;
11426         nla_nest_end(msg, nl_freq);
11427
11428         genlmsg_end(msg, hdr);
11429
11430         rcu_read_lock();
11431         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11432                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11433         rcu_read_unlock();
11434
11435         return;
11436
11437 nla_put_failure:
11438         genlmsg_cancel(msg, hdr);
11439         nlmsg_free(msg);
11440 }
11441
11442 static void nl80211_send_remain_on_chan_event(
11443         int cmd, struct cfg80211_registered_device *rdev,
11444         struct wireless_dev *wdev, u64 cookie,
11445         struct ieee80211_channel *chan,
11446         unsigned int duration, gfp_t gfp)
11447 {
11448         struct sk_buff *msg;
11449         void *hdr;
11450
11451         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11452         if (!msg)
11453                 return;
11454
11455         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11456         if (!hdr) {
11457                 nlmsg_free(msg);
11458                 return;
11459         }
11460
11461         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11462             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11463                                          wdev->netdev->ifindex)) ||
11464             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11465             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
11466             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
11467                         NL80211_CHAN_NO_HT) ||
11468             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
11469                 goto nla_put_failure;
11470
11471         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
11472             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
11473                 goto nla_put_failure;
11474
11475         genlmsg_end(msg, hdr);
11476
11477         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11478                                 NL80211_MCGRP_MLME, gfp);
11479         return;
11480
11481  nla_put_failure:
11482         genlmsg_cancel(msg, hdr);
11483         nlmsg_free(msg);
11484 }
11485
11486 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
11487                                struct ieee80211_channel *chan,
11488                                unsigned int duration, gfp_t gfp)
11489 {
11490         struct wiphy *wiphy = wdev->wiphy;
11491         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11492
11493         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
11494         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
11495                                           rdev, wdev, cookie, chan,
11496                                           duration, gfp);
11497 }
11498 EXPORT_SYMBOL(cfg80211_ready_on_channel);
11499
11500 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
11501                                         struct ieee80211_channel *chan,
11502                                         gfp_t gfp)
11503 {
11504         struct wiphy *wiphy = wdev->wiphy;
11505         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11506
11507         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
11508         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11509                                           rdev, wdev, cookie, chan, 0, gfp);
11510 }
11511 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
11512
11513 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
11514                       struct station_info *sinfo, gfp_t gfp)
11515 {
11516         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
11517         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11518         struct sk_buff *msg;
11519
11520         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
11521
11522         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11523         if (!msg)
11524                 return;
11525
11526         if (nl80211_send_station(msg, 0, 0, 0,
11527                                  rdev, dev, mac_addr, sinfo) < 0) {
11528                 nlmsg_free(msg);
11529                 return;
11530         }
11531
11532         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11533                                 NL80211_MCGRP_MLME, gfp);
11534 }
11535 EXPORT_SYMBOL(cfg80211_new_sta);
11536
11537 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
11538 {
11539         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
11540         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11541         struct sk_buff *msg;
11542         void *hdr;
11543
11544         trace_cfg80211_del_sta(dev, mac_addr);
11545
11546         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11547         if (!msg)
11548                 return;
11549
11550         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
11551         if (!hdr) {
11552                 nlmsg_free(msg);
11553                 return;
11554         }
11555
11556         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11557             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
11558                 goto nla_put_failure;
11559
11560         genlmsg_end(msg, hdr);
11561
11562         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11563                                 NL80211_MCGRP_MLME, gfp);
11564         return;
11565
11566  nla_put_failure:
11567         genlmsg_cancel(msg, hdr);
11568         nlmsg_free(msg);
11569 }
11570 EXPORT_SYMBOL(cfg80211_del_sta);
11571
11572 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
11573                           enum nl80211_connect_failed_reason reason,
11574                           gfp_t gfp)
11575 {
11576         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
11577         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11578         struct sk_buff *msg;
11579         void *hdr;
11580
11581         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
11582         if (!msg)
11583                 return;
11584
11585         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
11586         if (!hdr) {
11587                 nlmsg_free(msg);
11588                 return;
11589         }
11590
11591         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11592             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
11593             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
11594                 goto nla_put_failure;
11595
11596         genlmsg_end(msg, hdr);
11597
11598         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11599                                 NL80211_MCGRP_MLME, gfp);
11600         return;
11601
11602  nla_put_failure:
11603         genlmsg_cancel(msg, hdr);
11604         nlmsg_free(msg);
11605 }
11606 EXPORT_SYMBOL(cfg80211_conn_failed);
11607
11608 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
11609                                        const u8 *addr, gfp_t gfp)
11610 {
11611         struct wireless_dev *wdev = dev->ieee80211_ptr;
11612         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11613         struct sk_buff *msg;
11614         void *hdr;
11615         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
11616
11617         if (!nlportid)
11618                 return false;
11619
11620         msg = nlmsg_new(100, gfp);
11621         if (!msg)
11622                 return true;
11623
11624         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11625         if (!hdr) {
11626                 nlmsg_free(msg);
11627                 return true;
11628         }
11629
11630         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11631             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11632             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11633                 goto nla_put_failure;
11634
11635         genlmsg_end(msg, hdr);
11636         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11637         return true;
11638
11639  nla_put_failure:
11640         genlmsg_cancel(msg, hdr);
11641         nlmsg_free(msg);
11642         return true;
11643 }
11644
11645 bool cfg80211_rx_spurious_frame(struct net_device *dev,
11646                                 const u8 *addr, gfp_t gfp)
11647 {
11648         struct wireless_dev *wdev = dev->ieee80211_ptr;
11649         bool ret;
11650
11651         trace_cfg80211_rx_spurious_frame(dev, addr);
11652
11653         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11654                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
11655                 trace_cfg80211_return_bool(false);
11656                 return false;
11657         }
11658         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
11659                                          addr, gfp);
11660         trace_cfg80211_return_bool(ret);
11661         return ret;
11662 }
11663 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
11664
11665 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
11666                                         const u8 *addr, gfp_t gfp)
11667 {
11668         struct wireless_dev *wdev = dev->ieee80211_ptr;
11669         bool ret;
11670
11671         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
11672
11673         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
11674                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
11675                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
11676                 trace_cfg80211_return_bool(false);
11677                 return false;
11678         }
11679         ret = __nl80211_unexpected_frame(dev,
11680                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
11681                                          addr, gfp);
11682         trace_cfg80211_return_bool(ret);
11683         return ret;
11684 }
11685 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
11686
11687 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
11688                       struct wireless_dev *wdev, u32 nlportid,
11689                       int freq, int sig_dbm,
11690                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
11691 {
11692         struct net_device *netdev = wdev->netdev;
11693         struct sk_buff *msg;
11694         void *hdr;
11695
11696         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11697         if (!msg)
11698                 return -ENOMEM;
11699
11700         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11701         if (!hdr) {
11702                 nlmsg_free(msg);
11703                 return -ENOMEM;
11704         }
11705
11706         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11707             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11708                                         netdev->ifindex)) ||
11709             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11710             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
11711             (sig_dbm &&
11712              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11713             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11714             (flags &&
11715              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
11716                 goto nla_put_failure;
11717
11718         genlmsg_end(msg, hdr);
11719
11720         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11721
11722  nla_put_failure:
11723         genlmsg_cancel(msg, hdr);
11724         nlmsg_free(msg);
11725         return -ENOBUFS;
11726 }
11727
11728 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
11729                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
11730 {
11731         struct wiphy *wiphy = wdev->wiphy;
11732         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11733         struct net_device *netdev = wdev->netdev;
11734         struct sk_buff *msg;
11735         void *hdr;
11736
11737         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
11738
11739         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11740         if (!msg)
11741                 return;
11742
11743         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
11744         if (!hdr) {
11745                 nlmsg_free(msg);
11746                 return;
11747         }
11748
11749         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11750             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11751                                    netdev->ifindex)) ||
11752             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
11753             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
11754             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11755             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
11756                 goto nla_put_failure;
11757
11758         genlmsg_end(msg, hdr);
11759
11760         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11761                                 NL80211_MCGRP_MLME, gfp);
11762         return;
11763
11764  nla_put_failure:
11765         genlmsg_cancel(msg, hdr);
11766         nlmsg_free(msg);
11767 }
11768 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
11769
11770 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
11771                                             const char *mac, gfp_t gfp)
11772 {
11773         struct wireless_dev *wdev = dev->ieee80211_ptr;
11774         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
11775         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11776         void **cb;
11777
11778         if (!msg)
11779                 return NULL;
11780
11781         cb = (void **)msg->cb;
11782
11783         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
11784         if (!cb[0]) {
11785                 nlmsg_free(msg);
11786                 return NULL;
11787         }
11788
11789         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11790             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
11791                 goto nla_put_failure;
11792
11793         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
11794                 goto nla_put_failure;
11795
11796         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
11797         if (!cb[1])
11798                 goto nla_put_failure;
11799
11800         cb[2] = rdev;
11801
11802         return msg;
11803  nla_put_failure:
11804         nlmsg_free(msg);
11805         return NULL;
11806 }
11807
11808 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
11809 {
11810         void **cb = (void **)msg->cb;
11811         struct cfg80211_registered_device *rdev = cb[2];
11812
11813         nla_nest_end(msg, cb[1]);
11814         genlmsg_end(msg, cb[0]);
11815
11816         memset(msg->cb, 0, sizeof(msg->cb));
11817
11818         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11819                                 NL80211_MCGRP_MLME, gfp);
11820 }
11821
11822 void cfg80211_cqm_rssi_notify(struct net_device *dev,
11823                               enum nl80211_cqm_rssi_threshold_event rssi_event,
11824                               gfp_t gfp)
11825 {
11826         struct sk_buff *msg;
11827
11828         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
11829
11830         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
11831                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
11832                 return;
11833
11834         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
11835         if (!msg)
11836                 return;
11837
11838         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
11839                         rssi_event))
11840                 goto nla_put_failure;
11841
11842         cfg80211_send_cqm(msg, gfp);
11843
11844         return;
11845
11846  nla_put_failure:
11847         nlmsg_free(msg);
11848 }
11849 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
11850
11851 void cfg80211_cqm_txe_notify(struct net_device *dev,
11852                              const u8 *peer, u32 num_packets,
11853                              u32 rate, u32 intvl, gfp_t gfp)
11854 {
11855         struct sk_buff *msg;
11856
11857         msg = cfg80211_prepare_cqm(dev, peer, gfp);
11858         if (!msg)
11859                 return;
11860
11861         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
11862                 goto nla_put_failure;
11863
11864         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
11865                 goto nla_put_failure;
11866
11867         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
11868                 goto nla_put_failure;
11869
11870         cfg80211_send_cqm(msg, gfp);
11871         return;
11872
11873  nla_put_failure:
11874         nlmsg_free(msg);
11875 }
11876 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
11877
11878 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
11879                                  const u8 *peer, u32 num_packets, gfp_t gfp)
11880 {
11881         struct sk_buff *msg;
11882
11883         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
11884
11885         msg = cfg80211_prepare_cqm(dev, peer, gfp);
11886         if (!msg)
11887                 return;
11888
11889         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
11890                 goto nla_put_failure;
11891
11892         cfg80211_send_cqm(msg, gfp);
11893         return;
11894
11895  nla_put_failure:
11896         nlmsg_free(msg);
11897 }
11898 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
11899
11900 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
11901 {
11902         struct sk_buff *msg;
11903
11904         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
11905         if (!msg)
11906                 return;
11907
11908         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
11909                 goto nla_put_failure;
11910
11911         cfg80211_send_cqm(msg, gfp);
11912         return;
11913
11914  nla_put_failure:
11915         nlmsg_free(msg);
11916 }
11917 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
11918
11919 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
11920                                      struct net_device *netdev, const u8 *bssid,
11921                                      const u8 *replay_ctr, gfp_t gfp)
11922 {
11923         struct sk_buff *msg;
11924         struct nlattr *rekey_attr;
11925         void *hdr;
11926
11927         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11928         if (!msg)
11929                 return;
11930
11931         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
11932         if (!hdr) {
11933                 nlmsg_free(msg);
11934                 return;
11935         }
11936
11937         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11938             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11939             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
11940                 goto nla_put_failure;
11941
11942         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
11943         if (!rekey_attr)
11944                 goto nla_put_failure;
11945
11946         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
11947                     NL80211_REPLAY_CTR_LEN, replay_ctr))
11948                 goto nla_put_failure;
11949
11950         nla_nest_end(msg, rekey_attr);
11951
11952         genlmsg_end(msg, hdr);
11953
11954         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11955                                 NL80211_MCGRP_MLME, gfp);
11956         return;
11957
11958  nla_put_failure:
11959         genlmsg_cancel(msg, hdr);
11960         nlmsg_free(msg);
11961 }
11962
11963 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
11964                                const u8 *replay_ctr, gfp_t gfp)
11965 {
11966         struct wireless_dev *wdev = dev->ieee80211_ptr;
11967         struct wiphy *wiphy = wdev->wiphy;
11968         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11969
11970         trace_cfg80211_gtk_rekey_notify(dev, bssid);
11971         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
11972 }
11973 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
11974
11975 static void
11976 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
11977                                struct net_device *netdev, int index,
11978                                const u8 *bssid, bool preauth, gfp_t gfp)
11979 {
11980         struct sk_buff *msg;
11981         struct nlattr *attr;
11982         void *hdr;
11983
11984         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11985         if (!msg)
11986                 return;
11987
11988         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
11989         if (!hdr) {
11990                 nlmsg_free(msg);
11991                 return;
11992         }
11993
11994         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11995             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11996                 goto nla_put_failure;
11997
11998         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
11999         if (!attr)
12000                 goto nla_put_failure;
12001
12002         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12003             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12004             (preauth &&
12005              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12006                 goto nla_put_failure;
12007
12008         nla_nest_end(msg, attr);
12009
12010         genlmsg_end(msg, hdr);
12011
12012         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12013                                 NL80211_MCGRP_MLME, gfp);
12014         return;
12015
12016  nla_put_failure:
12017         genlmsg_cancel(msg, hdr);
12018         nlmsg_free(msg);
12019 }
12020
12021 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12022                                      const u8 *bssid, bool preauth, gfp_t gfp)
12023 {
12024         struct wireless_dev *wdev = dev->ieee80211_ptr;
12025         struct wiphy *wiphy = wdev->wiphy;
12026         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12027
12028         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12029         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12030 }
12031 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12032
12033 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12034                                      struct net_device *netdev,
12035                                      struct cfg80211_chan_def *chandef,
12036                                      gfp_t gfp,
12037                                      enum nl80211_commands notif,
12038                                      u8 count)
12039 {
12040         struct sk_buff *msg;
12041         void *hdr;
12042
12043         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12044         if (!msg)
12045                 return;
12046
12047         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12048         if (!hdr) {
12049                 nlmsg_free(msg);
12050                 return;
12051         }
12052
12053         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12054                 goto nla_put_failure;
12055
12056         if (nl80211_send_chandef(msg, chandef))
12057                 goto nla_put_failure;
12058
12059         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12060             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12061                         goto nla_put_failure;
12062
12063         genlmsg_end(msg, hdr);
12064
12065         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12066                                 NL80211_MCGRP_MLME, gfp);
12067         return;
12068
12069  nla_put_failure:
12070         genlmsg_cancel(msg, hdr);
12071         nlmsg_free(msg);
12072 }
12073
12074 void cfg80211_ch_switch_notify(struct net_device *dev,
12075                                struct cfg80211_chan_def *chandef)
12076 {
12077         struct wireless_dev *wdev = dev->ieee80211_ptr;
12078         struct wiphy *wiphy = wdev->wiphy;
12079         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12080
12081         ASSERT_WDEV_LOCK(wdev);
12082
12083         trace_cfg80211_ch_switch_notify(dev, chandef);
12084
12085         wdev->chandef = *chandef;
12086         wdev->preset_chandef = *chandef;
12087         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12088                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12089 }
12090 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12091
12092 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12093                                        struct cfg80211_chan_def *chandef,
12094                                        u8 count)
12095 {
12096         struct wireless_dev *wdev = dev->ieee80211_ptr;
12097         struct wiphy *wiphy = wdev->wiphy;
12098         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12099
12100         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12101
12102         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12103                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12104 }
12105 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12106
12107 void
12108 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12109                      const struct cfg80211_chan_def *chandef,
12110                      enum nl80211_radar_event event,
12111                      struct net_device *netdev, gfp_t gfp)
12112 {
12113         struct sk_buff *msg;
12114         void *hdr;
12115
12116         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12117         if (!msg)
12118                 return;
12119
12120         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12121         if (!hdr) {
12122                 nlmsg_free(msg);
12123                 return;
12124         }
12125
12126         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12127                 goto nla_put_failure;
12128
12129         /* NOP and radar events don't need a netdev parameter */
12130         if (netdev) {
12131                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
12132
12133                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12134                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12135                         goto nla_put_failure;
12136         }
12137
12138         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
12139                 goto nla_put_failure;
12140
12141         if (nl80211_send_chandef(msg, chandef))
12142                 goto nla_put_failure;
12143
12144         genlmsg_end(msg, hdr);
12145
12146         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12147                                 NL80211_MCGRP_MLME, gfp);
12148         return;
12149
12150  nla_put_failure:
12151         genlmsg_cancel(msg, hdr);
12152         nlmsg_free(msg);
12153 }
12154
12155 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
12156                            u64 cookie, bool acked, gfp_t gfp)
12157 {
12158         struct wireless_dev *wdev = dev->ieee80211_ptr;
12159         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12160         struct sk_buff *msg;
12161         void *hdr;
12162
12163         trace_cfg80211_probe_status(dev, addr, cookie, acked);
12164
12165         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12166
12167         if (!msg)
12168                 return;
12169
12170         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
12171         if (!hdr) {
12172                 nlmsg_free(msg);
12173                 return;
12174         }
12175
12176         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12177             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12178             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12179             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12180             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
12181                 goto nla_put_failure;
12182
12183         genlmsg_end(msg, hdr);
12184
12185         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12186                                 NL80211_MCGRP_MLME, gfp);
12187         return;
12188
12189  nla_put_failure:
12190         genlmsg_cancel(msg, hdr);
12191         nlmsg_free(msg);
12192 }
12193 EXPORT_SYMBOL(cfg80211_probe_status);
12194
12195 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
12196                                  const u8 *frame, size_t len,
12197                                  int freq, int sig_dbm)
12198 {
12199         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12200         struct sk_buff *msg;
12201         void *hdr;
12202         struct cfg80211_beacon_registration *reg;
12203
12204         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
12205
12206         spin_lock_bh(&rdev->beacon_registrations_lock);
12207         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
12208                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
12209                 if (!msg) {
12210                         spin_unlock_bh(&rdev->beacon_registrations_lock);
12211                         return;
12212                 }
12213
12214                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12215                 if (!hdr)
12216                         goto nla_put_failure;
12217
12218                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12219                     (freq &&
12220                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
12221                     (sig_dbm &&
12222                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12223                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
12224                         goto nla_put_failure;
12225
12226                 genlmsg_end(msg, hdr);
12227
12228                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
12229         }
12230         spin_unlock_bh(&rdev->beacon_registrations_lock);
12231         return;
12232
12233  nla_put_failure:
12234         spin_unlock_bh(&rdev->beacon_registrations_lock);
12235         if (hdr)
12236                 genlmsg_cancel(msg, hdr);
12237         nlmsg_free(msg);
12238 }
12239 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
12240
12241 #ifdef CONFIG_PM
12242 static int cfg80211_net_detect_results(struct sk_buff *msg,
12243                                        struct cfg80211_wowlan_wakeup *wakeup)
12244 {
12245         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
12246         struct nlattr *nl_results, *nl_match, *nl_freqs;
12247         int i, j;
12248
12249         nl_results = nla_nest_start(
12250                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
12251         if (!nl_results)
12252                 return -EMSGSIZE;
12253
12254         for (i = 0; i < nd->n_matches; i++) {
12255                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
12256
12257                 nl_match = nla_nest_start(msg, i);
12258                 if (!nl_match)
12259                         break;
12260
12261                 /* The SSID attribute is optional in nl80211, but for
12262                  * simplicity reasons it's always present in the
12263                  * cfg80211 structure.  If a driver can't pass the
12264                  * SSID, that needs to be changed.  A zero length SSID
12265                  * is still a valid SSID (wildcard), so it cannot be
12266                  * used for this purpose.
12267                  */
12268                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
12269                             match->ssid.ssid)) {
12270                         nla_nest_cancel(msg, nl_match);
12271                         goto out;
12272                 }
12273
12274                 if (match->n_channels) {
12275                         nl_freqs = nla_nest_start(
12276                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
12277                         if (!nl_freqs) {
12278                                 nla_nest_cancel(msg, nl_match);
12279                                 goto out;
12280                         }
12281
12282                         for (j = 0; j < match->n_channels; j++) {
12283                                 if (nla_put_u32(msg,
12284                                                 NL80211_ATTR_WIPHY_FREQ,
12285                                                 match->channels[j])) {
12286                                         nla_nest_cancel(msg, nl_freqs);
12287                                         nla_nest_cancel(msg, nl_match);
12288                                         goto out;
12289                                 }
12290                         }
12291
12292                         nla_nest_end(msg, nl_freqs);
12293                 }
12294
12295                 nla_nest_end(msg, nl_match);
12296         }
12297
12298 out:
12299         nla_nest_end(msg, nl_results);
12300         return 0;
12301 }
12302
12303 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
12304                                    struct cfg80211_wowlan_wakeup *wakeup,
12305                                    gfp_t gfp)
12306 {
12307         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12308         struct sk_buff *msg;
12309         void *hdr;
12310         int size = 200;
12311
12312         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
12313
12314         if (wakeup)
12315                 size += wakeup->packet_present_len;
12316
12317         msg = nlmsg_new(size, gfp);
12318         if (!msg)
12319                 return;
12320
12321         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
12322         if (!hdr)
12323                 goto free_msg;
12324
12325         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12326             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12327                 goto free_msg;
12328
12329         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12330                                         wdev->netdev->ifindex))
12331                 goto free_msg;
12332
12333         if (wakeup) {
12334                 struct nlattr *reasons;
12335
12336                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
12337                 if (!reasons)
12338                         goto free_msg;
12339
12340                 if (wakeup->disconnect &&
12341                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
12342                         goto free_msg;
12343                 if (wakeup->magic_pkt &&
12344                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
12345                         goto free_msg;
12346                 if (wakeup->gtk_rekey_failure &&
12347                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
12348                         goto free_msg;
12349                 if (wakeup->eap_identity_req &&
12350                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
12351                         goto free_msg;
12352                 if (wakeup->four_way_handshake &&
12353                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
12354                         goto free_msg;
12355                 if (wakeup->rfkill_release &&
12356                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
12357                         goto free_msg;
12358
12359                 if (wakeup->pattern_idx >= 0 &&
12360                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
12361                                 wakeup->pattern_idx))
12362                         goto free_msg;
12363
12364                 if (wakeup->tcp_match &&
12365                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
12366                         goto free_msg;
12367
12368                 if (wakeup->tcp_connlost &&
12369                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
12370                         goto free_msg;
12371
12372                 if (wakeup->tcp_nomoretokens &&
12373                     nla_put_flag(msg,
12374                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
12375                         goto free_msg;
12376
12377                 if (wakeup->packet) {
12378                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
12379                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
12380
12381                         if (!wakeup->packet_80211) {
12382                                 pkt_attr =
12383                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
12384                                 len_attr =
12385                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
12386                         }
12387
12388                         if (wakeup->packet_len &&
12389                             nla_put_u32(msg, len_attr, wakeup->packet_len))
12390                                 goto free_msg;
12391
12392                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
12393                                     wakeup->packet))
12394                                 goto free_msg;
12395                 }
12396
12397                 if (wakeup->net_detect &&
12398                     cfg80211_net_detect_results(msg, wakeup))
12399                                 goto free_msg;
12400
12401                 nla_nest_end(msg, reasons);
12402         }
12403
12404         genlmsg_end(msg, hdr);
12405
12406         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12407                                 NL80211_MCGRP_MLME, gfp);
12408         return;
12409
12410  free_msg:
12411         nlmsg_free(msg);
12412 }
12413 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
12414 #endif
12415
12416 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
12417                                 enum nl80211_tdls_operation oper,
12418                                 u16 reason_code, gfp_t gfp)
12419 {
12420         struct wireless_dev *wdev = dev->ieee80211_ptr;
12421         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12422         struct sk_buff *msg;
12423         void *hdr;
12424
12425         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
12426                                          reason_code);
12427
12428         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12429         if (!msg)
12430                 return;
12431
12432         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
12433         if (!hdr) {
12434                 nlmsg_free(msg);
12435                 return;
12436         }
12437
12438         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12439             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12440             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
12441             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
12442             (reason_code > 0 &&
12443              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
12444                 goto nla_put_failure;
12445
12446         genlmsg_end(msg, hdr);
12447
12448         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12449                                 NL80211_MCGRP_MLME, gfp);
12450         return;
12451
12452  nla_put_failure:
12453         genlmsg_cancel(msg, hdr);
12454         nlmsg_free(msg);
12455 }
12456 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
12457
12458 static int nl80211_netlink_notify(struct notifier_block * nb,
12459                                   unsigned long state,
12460                                   void *_notify)
12461 {
12462         struct netlink_notify *notify = _notify;
12463         struct cfg80211_registered_device *rdev;
12464         struct wireless_dev *wdev;
12465         struct cfg80211_beacon_registration *reg, *tmp;
12466
12467         if (state != NETLINK_URELEASE)
12468                 return NOTIFY_DONE;
12469
12470         rcu_read_lock();
12471
12472         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
12473                 bool schedule_destroy_work = false;
12474
12475                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
12476                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
12477
12478                         if (wdev->owner_nlportid == notify->portid)
12479                                 schedule_destroy_work = true;
12480                 }
12481
12482                 spin_lock_bh(&rdev->beacon_registrations_lock);
12483                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
12484                                          list) {
12485                         if (reg->nlportid == notify->portid) {
12486                                 list_del(&reg->list);
12487                                 kfree(reg);
12488                                 break;
12489                         }
12490                 }
12491                 spin_unlock_bh(&rdev->beacon_registrations_lock);
12492
12493                 if (schedule_destroy_work) {
12494                         struct cfg80211_iface_destroy *destroy;
12495
12496                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
12497                         if (destroy) {
12498                                 destroy->nlportid = notify->portid;
12499                                 spin_lock(&rdev->destroy_list_lock);
12500                                 list_add(&destroy->list, &rdev->destroy_list);
12501                                 spin_unlock(&rdev->destroy_list_lock);
12502                                 schedule_work(&rdev->destroy_work);
12503                         }
12504                 }
12505         }
12506
12507         rcu_read_unlock();
12508
12509         return NOTIFY_OK;
12510 }
12511
12512 static struct notifier_block nl80211_netlink_notifier = {
12513         .notifier_call = nl80211_netlink_notify,
12514 };
12515
12516 void cfg80211_ft_event(struct net_device *netdev,
12517                        struct cfg80211_ft_event_params *ft_event)
12518 {
12519         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
12520         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12521         struct sk_buff *msg;
12522         void *hdr;
12523
12524         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
12525
12526         if (!ft_event->target_ap)
12527                 return;
12528
12529         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12530         if (!msg)
12531                 return;
12532
12533         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
12534         if (!hdr)
12535                 goto out;
12536
12537         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12538             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12539             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
12540                 goto out;
12541
12542         if (ft_event->ies &&
12543             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
12544                 goto out;
12545         if (ft_event->ric_ies &&
12546             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
12547                     ft_event->ric_ies))
12548                 goto out;
12549
12550         genlmsg_end(msg, hdr);
12551
12552         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12553                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12554         return;
12555  out:
12556         nlmsg_free(msg);
12557 }
12558 EXPORT_SYMBOL(cfg80211_ft_event);
12559
12560 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
12561 {
12562         struct cfg80211_registered_device *rdev;
12563         struct sk_buff *msg;
12564         void *hdr;
12565         u32 nlportid;
12566
12567         rdev = wiphy_to_rdev(wdev->wiphy);
12568         if (!rdev->crit_proto_nlportid)
12569                 return;
12570
12571         nlportid = rdev->crit_proto_nlportid;
12572         rdev->crit_proto_nlportid = 0;
12573
12574         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12575         if (!msg)
12576                 return;
12577
12578         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
12579         if (!hdr)
12580                 goto nla_put_failure;
12581
12582         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12583             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12584                 goto nla_put_failure;
12585
12586         genlmsg_end(msg, hdr);
12587
12588         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12589         return;
12590
12591  nla_put_failure:
12592         if (hdr)
12593                 genlmsg_cancel(msg, hdr);
12594         nlmsg_free(msg);
12595
12596 }
12597 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
12598
12599 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
12600 {
12601         struct wiphy *wiphy = wdev->wiphy;
12602         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12603         struct sk_buff *msg;
12604         void *hdr;
12605
12606         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12607         if (!msg)
12608                 return;
12609
12610         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
12611         if (!hdr)
12612                 goto out;
12613
12614         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12615             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
12616             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12617                 goto out;
12618
12619         genlmsg_end(msg, hdr);
12620
12621         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
12622                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12623         return;
12624  out:
12625         nlmsg_free(msg);
12626 }
12627
12628 /* initialisation/exit functions */
12629
12630 int nl80211_init(void)
12631 {
12632         int err;
12633
12634         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
12635                                                    nl80211_mcgrps);
12636         if (err)
12637                 return err;
12638
12639         err = netlink_register_notifier(&nl80211_netlink_notifier);
12640         if (err)
12641                 goto err_out;
12642
12643         return 0;
12644  err_out:
12645         genl_unregister_family(&nl80211_fam);
12646         return err;
12647 }
12648
12649 void nl80211_exit(void)
12650 {
12651         netlink_unregister_notifier(&nl80211_netlink_notifier);
12652         genl_unregister_family(&nl80211_fam);
12653 }