net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  41         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  42         .hdrsize = 0,                   /* no private header */
  43         .version = 1,                   /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* multicast groups */
  51 enum nl80211_multicast_groups {
  52         NL80211_MCGRP_CONFIG,
  53         NL80211_MCGRP_SCAN,
  54         NL80211_MCGRP_REGULATORY,
  55         NL80211_MCGRP_MLME,
  56         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  57 };
  58
  59 static const struct genl_multicast_group nl80211_mcgrps[] = {
  60         [NL80211_MCGRP_CONFIG] = { .name = "config", },
  61         [NL80211_MCGRP_SCAN] = { .name = "scan", },
  62         [NL80211_MCGRP_REGULATORY] = { .name = "regulatory", },
  63         [NL80211_MCGRP_MLME] = { .name = "mlme", },
  64 #ifdef CONFIG_NL80211_TESTMODE
  65         [NL80211_MCGRP_TESTMODE] = { .name = "testmode", }
  66 #endif
  67 };
  68
  69 /* returns ERR_PTR values */
  70 static struct wireless_dev *
  71 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  72 {
  73         struct cfg80211_registered_device *rdev;
  74         struct wireless_dev *result = NULL;
  75         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  76         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  77         u64 wdev_id;
  78         int wiphy_idx = -1;
  79         int ifidx = -1;
  80
  81         ASSERT_RTNL();
  82
  83         if (!have_ifidx && !have_wdev_id)
  84                 return ERR_PTR(-EINVAL);
  85
  86         if (have_ifidx)
  87                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  88         if (have_wdev_id) {
  89                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  90                 wiphy_idx = wdev_id >> 32;
  91         }
  92
  93         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  94                 struct wireless_dev *wdev;
  95
  96                 if (wiphy_net(&rdev->wiphy) != netns)
  97                         continue;
  98
  99                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 100                         continue;
 101
 102                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 103                         if (have_ifidx && wdev->netdev &&
 104                             wdev->netdev->ifindex == ifidx) {
 105                                 result = wdev;
 106                                 break;
 107                         }
 108                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                 }
 113
 114                 if (result)
 115                         break;
 116         }
 117
 118         if (result)
 119                 return result;
 120         return ERR_PTR(-ENODEV);
 121 }
 122
 123 static struct cfg80211_registered_device *
 124 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 125 {
 126         struct cfg80211_registered_device *rdev = NULL, *tmp;
 127         struct net_device *netdev;
 128
 129         ASSERT_RTNL();
 130
 131         if (!attrs[NL80211_ATTR_WIPHY] &&
 132             !attrs[NL80211_ATTR_IFINDEX] &&
 133             !attrs[NL80211_ATTR_WDEV])
 134                 return ERR_PTR(-EINVAL);
 135
 136         if (attrs[NL80211_ATTR_WIPHY])
 137                 rdev = cfg80211_rdev_by_wiphy_idx(
 138                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 139
 140         if (attrs[NL80211_ATTR_WDEV]) {
 141                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 142                 struct wireless_dev *wdev;
 143                 bool found = false;
 144
 145                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 146                 if (tmp) {
 147                         /* make sure wdev exists */
 148                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 149                                 if (wdev->identifier != (u32)wdev_id)
 150                                         continue;
 151                                 found = true;
 152                                 break;
 153                         }
 154
 155                         if (!found)
 156                                 tmp = NULL;
 157
 158                         if (rdev && tmp != rdev)
 159                                 return ERR_PTR(-EINVAL);
 160                         rdev = tmp;
 161                 }
 162         }
 163
 164         if (attrs[NL80211_ATTR_IFINDEX]) {
 165                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 166                 netdev = dev_get_by_index(netns, ifindex);
 167                 if (netdev) {
 168                         if (netdev->ieee80211_ptr)
 169                                 tmp = wiphy_to_dev(
 170                                                 netdev->ieee80211_ptr->wiphy);
 171                         else
 172                                 tmp = NULL;
 173
 174                         dev_put(netdev);
 175
 176                         /* not wireless device -- return error */
 177                         if (!tmp)
 178                                 return ERR_PTR(-EINVAL);
 179
 180                         /* mismatch -- return error */
 181                         if (rdev && tmp != rdev)
 182                                 return ERR_PTR(-EINVAL);
 183
 184                         rdev = tmp;
 185                 }
 186         }
 187
 188         if (!rdev)
 189                 return ERR_PTR(-ENODEV);
 190
 191         if (netns != wiphy_net(&rdev->wiphy))
 192                 return ERR_PTR(-ENODEV);
 193
 194         return rdev;
 195 }
 196
 197 /*
 198  * This function returns a pointer to the driver
 199  * that the genl_info item that is passed refers to.
 200  *
 201  * The result of this can be a PTR_ERR and hence must
 202  * be checked with IS_ERR() for errors.
 203  */
 204 static struct cfg80211_registered_device *
 205 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 206 {
 207         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 208 }
 209
 210 /* policy for the attributes */
 211 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 212         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 213         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 214                                       .len = 20-1 },
 215         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 216
 217         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 218         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 219         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 220         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 221         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 222
 223         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 224         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 225         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 226         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 227         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 228
 229         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 231         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 232
 233         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 234         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 235
 236         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 237         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 238                                     .len = WLAN_MAX_KEY_LEN },
 239         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 240         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 241         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 242         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 243         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 244
 245         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 246         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 247         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 248                                        .len = IEEE80211_MAX_DATA_LEN },
 249         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 250                                        .len = IEEE80211_MAX_DATA_LEN },
 251         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 252         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 253         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 254         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 255                                                .len = NL80211_MAX_SUPP_RATES },
 256         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 257         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 258         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 259         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 260                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 261         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 262
 263         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 264         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 265
 266         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 267         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 268         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 269         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 270                                            .len = NL80211_MAX_SUPP_RATES },
 271         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 272
 273         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 274         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 275
 276         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 277
 278         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 280                               .len = IEEE80211_MAX_DATA_LEN },
 281         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 282         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 283
 284         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 285                                 .len = IEEE80211_MAX_SSID_LEN },
 286         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 287         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 288         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 289         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 290         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 291         [NL80211_ATTR_STA_FLAGS2] = {
 292                 .len = sizeof(struct nl80211_sta_flag_update),
 293         },
 294         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 295         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 296         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 297         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 298         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 299         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 300         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 301         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 302         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 303                                  .len = WLAN_PMKID_LEN },
 304         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 305         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 306         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 307         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 308                                  .len = IEEE80211_MAX_DATA_LEN },
 309         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 310         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 311         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 312         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 313         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 314         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 315         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 316         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 317         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 318         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 319         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 320         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 321         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 322         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 323         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 325         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 328         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 329                                          .len = IEEE80211_MAX_DATA_LEN },
 330         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 331                                          .len = IEEE80211_MAX_DATA_LEN },
 332         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 335         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 336         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 337         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 338         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 339         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 340         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 341         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 342                                       .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 344         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 346                 .len = NL80211_HT_CAPABILITY_LEN
 347         },
 348         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 349         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 350         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 351         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 352         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 353         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 354         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 355         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 356         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 357         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 358         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 359         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 360         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 361         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 362         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 363         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 364         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 365                 .len = NL80211_VHT_CAPABILITY_LEN,
 366         },
 367         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 368         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 369                                   .len = IEEE80211_MAX_DATA_LEN },
 370         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 371         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 372         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 373         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 374         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_U16 },
 375         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_U16 },
 376         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 377         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 378         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 379 };
 380
 381 /* policy for the key attributes */
 382 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 383         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 384         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 385         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 386         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 387         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 388         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 389         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 390         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 391 };
 392
 393 /* policy for the key default flags */
 394 static const struct nla_policy
 395 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 396         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 397         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 398 };
 399
 400 /* policy for WoWLAN attributes */
 401 static const struct nla_policy
 402 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 403         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 404         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 405         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 406         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 407         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 408         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 409         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 410         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 411         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 412 };
 413
 414 static const struct nla_policy
 415 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 416         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 417         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 418         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 419         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 420         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 421         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 422         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 423                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 424         },
 425         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 426                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 427         },
 428         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 429         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 430         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 431 };
 432
 433 /* policy for coalesce rule attributes */
 434 static const struct nla_policy
 435 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 436         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 437         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 438         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 439 };
 440
 441 /* policy for GTK rekey offload attributes */
 442 static const struct nla_policy
 443 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 444         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 445         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 446         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 447 };
 448
 449 static const struct nla_policy
 450 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 451         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 452                                                  .len = IEEE80211_MAX_SSID_LEN },
 453         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 454 };
 455
 456 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 457                                      struct netlink_callback *cb,
 458                                      struct cfg80211_registered_device **rdev,
 459                                      struct wireless_dev **wdev)
 460 {
 461         int err;
 462
 463         rtnl_lock();
 464
 465         if (!cb->args[0]) {
 466                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 467                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 468                                   nl80211_policy);
 469                 if (err)
 470                         goto out_unlock;
 471
 472                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 473                                                    nl80211_fam.attrbuf);
 474                 if (IS_ERR(*wdev)) {
 475                         err = PTR_ERR(*wdev);
 476                         goto out_unlock;
 477                 }
 478                 *rdev = wiphy_to_dev((*wdev)->wiphy);
 479                 /* 0 is the first index - add 1 to parse only once */
 480                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 481                 cb->args[1] = (*wdev)->identifier;
 482         } else {
 483                 /* subtract the 1 again here */
 484                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 485                 struct wireless_dev *tmp;
 486
 487                 if (!wiphy) {
 488                         err = -ENODEV;
 489                         goto out_unlock;
 490                 }
 491                 *rdev = wiphy_to_dev(wiphy);
 492                 *wdev = NULL;
 493
 494                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 495                         if (tmp->identifier == cb->args[1]) {
 496                                 *wdev = tmp;
 497                                 break;
 498                         }
 499                 }
 500
 501                 if (!*wdev) {
 502                         err = -ENODEV;
 503                         goto out_unlock;
 504                 }
 505         }
 506
 507         return 0;
 508  out_unlock:
 509         rtnl_unlock();
 510         return err;
 511 }
 512
 513 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 514 {
 515         rtnl_unlock();
 516 }
 517
 518 /* IE validation */
 519 static bool is_valid_ie_attr(const struct nlattr *attr)
 520 {
 521         const u8 *pos;
 522         int len;
 523
 524         if (!attr)
 525                 return true;
 526
 527         pos = nla_data(attr);
 528         len = nla_len(attr);
 529
 530         while (len) {
 531                 u8 elemlen;
 532
 533                 if (len < 2)
 534                         return false;
 535                 len -= 2;
 536
 537                 elemlen = pos[1];
 538                 if (elemlen > len)
 539                         return false;
 540
 541                 len -= elemlen;
 542                 pos += 2 + elemlen;
 543         }
 544
 545         return true;
 546 }
 547
 548 /* message building helper */
 549 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 550                                    int flags, u8 cmd)
 551 {
 552         /* since there is no private header just add the generic one */
 553         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 554 }
 555
 556 static int nl80211_msg_put_channel(struct sk_buff *msg,
 557                                    struct ieee80211_channel *chan,
 558                                    bool large)
 559 {
 560         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 561                         chan->center_freq))
 562                 goto nla_put_failure;
 563
 564         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 565             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 566                 goto nla_put_failure;
 567         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 568             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 569                 goto nla_put_failure;
 570         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 571             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 572                 goto nla_put_failure;
 573         if (chan->flags & IEEE80211_CHAN_RADAR) {
 574                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 575                         goto nla_put_failure;
 576                 if (large) {
 577                         u32 time;
 578
 579                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 580
 581                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 582                                         chan->dfs_state))
 583                                 goto nla_put_failure;
 584                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 585                                         time))
 586                                 goto nla_put_failure;
 587                 }
 588         }
 589
 590         if (large) {
 591                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 592                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 593                         goto nla_put_failure;
 594                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 595                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 596                         goto nla_put_failure;
 597                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 598                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 599                         goto nla_put_failure;
 600                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 601                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 602                         goto nla_put_failure;
 603         }
 604
 605         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 606                         DBM_TO_MBM(chan->max_power)))
 607                 goto nla_put_failure;
 608
 609         return 0;
 610
 611  nla_put_failure:
 612         return -ENOBUFS;
 613 }
 614
 615 /* netlink command implementations */
 616
 617 struct key_parse {
 618         struct key_params p;
 619         int idx;
 620         int type;
 621         bool def, defmgmt;
 622         bool def_uni, def_multi;
 623 };
 624
 625 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 626 {
 627         struct nlattr *tb[NL80211_KEY_MAX + 1];
 628         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 629                                    nl80211_key_policy);
 630         if (err)
 631                 return err;
 632
 633         k->def = !!tb[NL80211_KEY_DEFAULT];
 634         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 635
 636         if (k->def) {
 637                 k->def_uni = true;
 638                 k->def_multi = true;
 639         }
 640         if (k->defmgmt)
 641                 k->def_multi = true;
 642
 643         if (tb[NL80211_KEY_IDX])
 644                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 645
 646         if (tb[NL80211_KEY_DATA]) {
 647                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 648                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 649         }
 650
 651         if (tb[NL80211_KEY_SEQ]) {
 652                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 653                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 654         }
 655
 656         if (tb[NL80211_KEY_CIPHER])
 657                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 658
 659         if (tb[NL80211_KEY_TYPE]) {
 660                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 661                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 662                         return -EINVAL;
 663         }
 664
 665         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 666                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 667                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 668                                        tb[NL80211_KEY_DEFAULT_TYPES],
 669                                        nl80211_key_default_policy);
 670                 if (err)
 671                         return err;
 672
 673                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 674                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 675         }
 676
 677         return 0;
 678 }
 679
 680 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 681 {
 682         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 683                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 684                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 685         }
 686
 687         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 688                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 689                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 690         }
 691
 692         if (info->attrs[NL80211_ATTR_KEY_IDX])
 693                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 694
 695         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 696                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 697
 698         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 699         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 700
 701         if (k->def) {
 702                 k->def_uni = true;
 703                 k->def_multi = true;
 704         }
 705         if (k->defmgmt)
 706                 k->def_multi = true;
 707
 708         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 709                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 710                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 711                         return -EINVAL;
 712         }
 713
 714         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 715                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 716                 int err = nla_parse_nested(
 717                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 718                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 719                                 nl80211_key_default_policy);
 720                 if (err)
 721                         return err;
 722
 723                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 724                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 725         }
 726
 727         return 0;
 728 }
 729
 730 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 731 {
 732         int err;
 733
 734         memset(k, 0, sizeof(*k));
 735         k->idx = -1;
 736         k->type = -1;
 737
 738         if (info->attrs[NL80211_ATTR_KEY])
 739                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 740         else
 741                 err = nl80211_parse_key_old(info, k);
 742
 743         if (err)
 744                 return err;
 745
 746         if (k->def && k->defmgmt)
 747                 return -EINVAL;
 748
 749         if (k->defmgmt) {
 750                 if (k->def_uni || !k->def_multi)
 751                         return -EINVAL;
 752         }
 753
 754         if (k->idx != -1) {
 755                 if (k->defmgmt) {
 756                         if (k->idx < 4 || k->idx > 5)
 757                                 return -EINVAL;
 758                 } else if (k->def) {
 759                         if (k->idx < 0 || k->idx > 3)
 760                                 return -EINVAL;
 761                 } else {
 762                         if (k->idx < 0 || k->idx > 5)
 763                                 return -EINVAL;
 764                 }
 765         }
 766
 767         return 0;
 768 }
 769
 770 static struct cfg80211_cached_keys *
 771 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 772                        struct nlattr *keys, bool *no_ht)
 773 {
 774         struct key_parse parse;
 775         struct nlattr *key;
 776         struct cfg80211_cached_keys *result;
 777         int rem, err, def = 0;
 778
 779         result = kzalloc(sizeof(*result), GFP_KERNEL);
 780         if (!result)
 781                 return ERR_PTR(-ENOMEM);
 782
 783         result->def = -1;
 784         result->defmgmt = -1;
 785
 786         nla_for_each_nested(key, keys, rem) {
 787                 memset(&parse, 0, sizeof(parse));
 788                 parse.idx = -1;
 789
 790                 err = nl80211_parse_key_new(key, &parse);
 791                 if (err)
 792                         goto error;
 793                 err = -EINVAL;
 794                 if (!parse.p.key)
 795                         goto error;
 796                 if (parse.idx < 0 || parse.idx > 4)
 797                         goto error;
 798                 if (parse.def) {
 799                         if (def)
 800                                 goto error;
 801                         def = 1;
 802                         result->def = parse.idx;
 803                         if (!parse.def_uni || !parse.def_multi)
 804                                 goto error;
 805                 } else if (parse.defmgmt)
 806                         goto error;
 807                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 808                                                      parse.idx, false, NULL);
 809                 if (err)
 810                         goto error;
 811                 result->params[parse.idx].cipher = parse.p.cipher;
 812                 result->params[parse.idx].key_len = parse.p.key_len;
 813                 result->params[parse.idx].key = result->data[parse.idx];
 814                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 815
 816                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 817                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 818                         if (no_ht)
 819                                 *no_ht = true;
 820                 }
 821         }
 822
 823         return result;
 824  error:
 825         kfree(result);
 826         return ERR_PTR(err);
 827 }
 828
 829 static int nl80211_key_allowed(struct wireless_dev *wdev)
 830 {
 831         ASSERT_WDEV_LOCK(wdev);
 832
 833         switch (wdev->iftype) {
 834         case NL80211_IFTYPE_AP:
 835         case NL80211_IFTYPE_AP_VLAN:
 836         case NL80211_IFTYPE_P2P_GO:
 837         case NL80211_IFTYPE_MESH_POINT:
 838                 break;
 839         case NL80211_IFTYPE_ADHOC:
 840         case NL80211_IFTYPE_STATION:
 841         case NL80211_IFTYPE_P2P_CLIENT:
 842                 if (!wdev->current_bss)
 843                         return -ENOLINK;
 844                 break;
 845         default:
 846                 return -EINVAL;
 847         }
 848
 849         return 0;
 850 }
 851
 852 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 853 {
 854         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 855         int i;
 856
 857         if (!nl_modes)
 858                 goto nla_put_failure;
 859
 860         i = 0;
 861         while (ifmodes) {
 862                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 863                         goto nla_put_failure;
 864                 ifmodes >>= 1;
 865                 i++;
 866         }
 867
 868         nla_nest_end(msg, nl_modes);
 869         return 0;
 870
 871 nla_put_failure:
 872         return -ENOBUFS;
 873 }
 874
 875 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 876                                           struct sk_buff *msg,
 877                                           bool large)
 878 {
 879         struct nlattr *nl_combis;
 880         int i, j;
 881
 882         nl_combis = nla_nest_start(msg,
 883                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 884         if (!nl_combis)
 885                 goto nla_put_failure;
 886
 887         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 888                 const struct ieee80211_iface_combination *c;
 889                 struct nlattr *nl_combi, *nl_limits;
 890
 891                 c = &wiphy->iface_combinations[i];
 892
 893                 nl_combi = nla_nest_start(msg, i + 1);
 894                 if (!nl_combi)
 895                         goto nla_put_failure;
 896
 897                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 898                 if (!nl_limits)
 899                         goto nla_put_failure;
 900
 901                 for (j = 0; j < c->n_limits; j++) {
 902                         struct nlattr *nl_limit;
 903
 904                         nl_limit = nla_nest_start(msg, j + 1);
 905                         if (!nl_limit)
 906                                 goto nla_put_failure;
 907                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 908                                         c->limits[j].max))
 909                                 goto nla_put_failure;
 910                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 911                                                 c->limits[j].types))
 912                                 goto nla_put_failure;
 913                         nla_nest_end(msg, nl_limit);
 914                 }
 915
 916                 nla_nest_end(msg, nl_limits);
 917
 918                 if (c->beacon_int_infra_match &&
 919                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 920                         goto nla_put_failure;
 921                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 922                                 c->num_different_channels) ||
 923                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 924                                 c->max_interfaces))
 925                         goto nla_put_failure;
 926                 if (large &&
 927                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 928                                 c->radar_detect_widths))
 929                         goto nla_put_failure;
 930
 931                 nla_nest_end(msg, nl_combi);
 932         }
 933
 934         nla_nest_end(msg, nl_combis);
 935
 936         return 0;
 937 nla_put_failure:
 938         return -ENOBUFS;
 939 }
 940
 941 #ifdef CONFIG_PM
 942 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 943                                         struct sk_buff *msg)
 944 {
 945         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
 946         struct nlattr *nl_tcp;
 947
 948         if (!tcp)
 949                 return 0;
 950
 951         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 952         if (!nl_tcp)
 953                 return -ENOBUFS;
 954
 955         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 956                         tcp->data_payload_max))
 957                 return -ENOBUFS;
 958
 959         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 960                         tcp->data_payload_max))
 961                 return -ENOBUFS;
 962
 963         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 964                 return -ENOBUFS;
 965
 966         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 967                                 sizeof(*tcp->tok), tcp->tok))
 968                 return -ENOBUFS;
 969
 970         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 971                         tcp->data_interval_max))
 972                 return -ENOBUFS;
 973
 974         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 975                         tcp->wake_payload_max))
 976                 return -ENOBUFS;
 977
 978         nla_nest_end(msg, nl_tcp);
 979         return 0;
 980 }
 981
 982 static int nl80211_send_wowlan(struct sk_buff *msg,
 983                                struct cfg80211_registered_device *dev,
 984                                bool large)
 985 {
 986         struct nlattr *nl_wowlan;
 987
 988         if (!dev->wiphy.wowlan)
 989                 return 0;
 990
 991         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 992         if (!nl_wowlan)
 993                 return -ENOBUFS;
 994
 995         if (((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
 996              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 997             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
 998              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 999             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1000              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1001             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1002              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1003             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1004              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1005             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1006              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1007             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1008              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1009             ((dev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1010              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1011                 return -ENOBUFS;
1012
1013         if (dev->wiphy.wowlan->n_patterns) {
1014                 struct nl80211_pattern_support pat = {
1015                         .max_patterns = dev->wiphy.wowlan->n_patterns,
1016                         .min_pattern_len = dev->wiphy.wowlan->pattern_min_len,
1017                         .max_pattern_len = dev->wiphy.wowlan->pattern_max_len,
1018                         .max_pkt_offset = dev->wiphy.wowlan->max_pkt_offset,
1019                 };
1020
1021                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1022                             sizeof(pat), &pat))
1023                         return -ENOBUFS;
1024         }
1025
1026         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1027                 return -ENOBUFS;
1028
1029         nla_nest_end(msg, nl_wowlan);
1030
1031         return 0;
1032 }
1033 #endif
1034
1035 static int nl80211_send_coalesce(struct sk_buff *msg,
1036                                  struct cfg80211_registered_device *dev)
1037 {
1038         struct nl80211_coalesce_rule_support rule;
1039
1040         if (!dev->wiphy.coalesce)
1041                 return 0;
1042
1043         rule.max_rules = dev->wiphy.coalesce->n_rules;
1044         rule.max_delay = dev->wiphy.coalesce->max_delay;
1045         rule.pat.max_patterns = dev->wiphy.coalesce->n_patterns;
1046         rule.pat.min_pattern_len = dev->wiphy.coalesce->pattern_min_len;
1047         rule.pat.max_pattern_len = dev->wiphy.coalesce->pattern_max_len;
1048         rule.pat.max_pkt_offset = dev->wiphy.coalesce->max_pkt_offset;
1049
1050         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1051                 return -ENOBUFS;
1052
1053         return 0;
1054 }
1055
1056 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1057                                       struct ieee80211_supported_band *sband)
1058 {
1059         struct nlattr *nl_rates, *nl_rate;
1060         struct ieee80211_rate *rate;
1061         int i;
1062
1063         /* add HT info */
1064         if (sband->ht_cap.ht_supported &&
1065             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1066                      sizeof(sband->ht_cap.mcs),
1067                      &sband->ht_cap.mcs) ||
1068              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1069                          sband->ht_cap.cap) ||
1070              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1071                         sband->ht_cap.ampdu_factor) ||
1072              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1073                         sband->ht_cap.ampdu_density)))
1074                 return -ENOBUFS;
1075
1076         /* add VHT info */
1077         if (sband->vht_cap.vht_supported &&
1078             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1079                      sizeof(sband->vht_cap.vht_mcs),
1080                      &sband->vht_cap.vht_mcs) ||
1081              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1082                          sband->vht_cap.cap)))
1083                 return -ENOBUFS;
1084
1085         /* add bitrates */
1086         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1087         if (!nl_rates)
1088                 return -ENOBUFS;
1089
1090         for (i = 0; i < sband->n_bitrates; i++) {
1091                 nl_rate = nla_nest_start(msg, i);
1092                 if (!nl_rate)
1093                         return -ENOBUFS;
1094
1095                 rate = &sband->bitrates[i];
1096                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1097                                 rate->bitrate))
1098                         return -ENOBUFS;
1099                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1100                     nla_put_flag(msg,
1101                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1102                         return -ENOBUFS;
1103
1104                 nla_nest_end(msg, nl_rate);
1105         }
1106
1107         nla_nest_end(msg, nl_rates);
1108
1109         return 0;
1110 }
1111
1112 static int
1113 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1114                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1115 {
1116         u16 stypes;
1117         struct nlattr *nl_ftypes, *nl_ifs;
1118         enum nl80211_iftype ift;
1119         int i;
1120
1121         if (!mgmt_stypes)
1122                 return 0;
1123
1124         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1125         if (!nl_ifs)
1126                 return -ENOBUFS;
1127
1128         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1129                 nl_ftypes = nla_nest_start(msg, ift);
1130                 if (!nl_ftypes)
1131                         return -ENOBUFS;
1132                 i = 0;
1133                 stypes = mgmt_stypes[ift].tx;
1134                 while (stypes) {
1135                         if ((stypes & 1) &&
1136                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1137                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1138                                 return -ENOBUFS;
1139                         stypes >>= 1;
1140                         i++;
1141                 }
1142                 nla_nest_end(msg, nl_ftypes);
1143         }
1144
1145         nla_nest_end(msg, nl_ifs);
1146
1147         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1148         if (!nl_ifs)
1149                 return -ENOBUFS;
1150
1151         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1152                 nl_ftypes = nla_nest_start(msg, ift);
1153                 if (!nl_ftypes)
1154                         return -ENOBUFS;
1155                 i = 0;
1156                 stypes = mgmt_stypes[ift].rx;
1157                 while (stypes) {
1158                         if ((stypes & 1) &&
1159                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1160                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1161                                 return -ENOBUFS;
1162                         stypes >>= 1;
1163                         i++;
1164                 }
1165                 nla_nest_end(msg, nl_ftypes);
1166         }
1167         nla_nest_end(msg, nl_ifs);
1168
1169         return 0;
1170 }
1171
1172 struct nl80211_dump_wiphy_state {
1173         s64 filter_wiphy;
1174         long start;
1175         long split_start, band_start, chan_start;
1176         bool split;
1177 };
1178
1179 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1180                               struct sk_buff *msg, u32 portid, u32 seq,
1181                               int flags, struct nl80211_dump_wiphy_state *state)
1182 {
1183         void *hdr;
1184         struct nlattr *nl_bands, *nl_band;
1185         struct nlattr *nl_freqs, *nl_freq;
1186         struct nlattr *nl_cmds;
1187         enum ieee80211_band band;
1188         struct ieee80211_channel *chan;
1189         int i;
1190         const struct ieee80211_txrx_stypes *mgmt_stypes =
1191                                 dev->wiphy.mgmt_stypes;
1192         u32 features;
1193
1194         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1195         if (!hdr)
1196                 return -ENOBUFS;
1197
1198         if (WARN_ON(!state))
1199                 return -EINVAL;
1200
1201         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1202             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1203                            wiphy_name(&dev->wiphy)) ||
1204             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1205                         cfg80211_rdev_list_generation))
1206                 goto nla_put_failure;
1207
1208         switch (state->split_start) {
1209         case 0:
1210                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1211                                dev->wiphy.retry_short) ||
1212                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1213                                dev->wiphy.retry_long) ||
1214                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1215                                 dev->wiphy.frag_threshold) ||
1216                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1217                                 dev->wiphy.rts_threshold) ||
1218                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1219                                dev->wiphy.coverage_class) ||
1220                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1221                                dev->wiphy.max_scan_ssids) ||
1222                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1223                                dev->wiphy.max_sched_scan_ssids) ||
1224                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1225                                 dev->wiphy.max_scan_ie_len) ||
1226                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1227                                 dev->wiphy.max_sched_scan_ie_len) ||
1228                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1229                                dev->wiphy.max_match_sets))
1230                         goto nla_put_failure;
1231
1232                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1233                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1234                         goto nla_put_failure;
1235                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1236                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1237                         goto nla_put_failure;
1238                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1239                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1240                         goto nla_put_failure;
1241                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1242                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1243                         goto nla_put_failure;
1244                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1245                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1246                         goto nla_put_failure;
1247                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1248                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1249                         goto nla_put_failure;
1250                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1251                     nla_put_flag(msg, WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1252                         goto nla_put_failure;
1253
1254                 state->split_start++;
1255                 if (state->split)
1256                         break;
1257         case 1:
1258                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1259                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1260                             dev->wiphy.cipher_suites))
1261                         goto nla_put_failure;
1262
1263                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1264                                dev->wiphy.max_num_pmkids))
1265                         goto nla_put_failure;
1266
1267                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1268                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1269                         goto nla_put_failure;
1270
1271                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1272                                 dev->wiphy.available_antennas_tx) ||
1273                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1274                                 dev->wiphy.available_antennas_rx))
1275                         goto nla_put_failure;
1276
1277                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1278                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1279                                 dev->wiphy.probe_resp_offload))
1280                         goto nla_put_failure;
1281
1282                 if ((dev->wiphy.available_antennas_tx ||
1283                      dev->wiphy.available_antennas_rx) &&
1284                     dev->ops->get_antenna) {
1285                         u32 tx_ant = 0, rx_ant = 0;
1286                         int res;
1287                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1288                         if (!res) {
1289                                 if (nla_put_u32(msg,
1290                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1291                                                 tx_ant) ||
1292                                     nla_put_u32(msg,
1293                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1294                                                 rx_ant))
1295                                         goto nla_put_failure;
1296                         }
1297                 }
1298
1299                 state->split_start++;
1300                 if (state->split)
1301                         break;
1302         case 2:
1303                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1304                                         dev->wiphy.interface_modes))
1305                                 goto nla_put_failure;
1306                 state->split_start++;
1307                 if (state->split)
1308                         break;
1309         case 3:
1310                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1311                 if (!nl_bands)
1312                         goto nla_put_failure;
1313
1314                 for (band = state->band_start;
1315                      band < IEEE80211_NUM_BANDS; band++) {
1316                         struct ieee80211_supported_band *sband;
1317
1318                         sband = dev->wiphy.bands[band];
1319
1320                         if (!sband)
1321                                 continue;
1322
1323                         nl_band = nla_nest_start(msg, band);
1324                         if (!nl_band)
1325                                 goto nla_put_failure;
1326
1327                         switch (state->chan_start) {
1328                         case 0:
1329                                 if (nl80211_send_band_rateinfo(msg, sband))
1330                                         goto nla_put_failure;
1331                                 state->chan_start++;
1332                                 if (state->split)
1333                                         break;
1334                         default:
1335                                 /* add frequencies */
1336                                 nl_freqs = nla_nest_start(
1337                                         msg, NL80211_BAND_ATTR_FREQS);
1338                                 if (!nl_freqs)
1339                                         goto nla_put_failure;
1340
1341                                 for (i = state->chan_start - 1;
1342                                      i < sband->n_channels;
1343                                      i++) {
1344                                         nl_freq = nla_nest_start(msg, i);
1345                                         if (!nl_freq)
1346                                                 goto nla_put_failure;
1347
1348                                         chan = &sband->channels[i];
1349
1350                                         if (nl80211_msg_put_channel(
1351                                                         msg, chan,
1352                                                         state->split))
1353                                                 goto nla_put_failure;
1354
1355                                         nla_nest_end(msg, nl_freq);
1356                                         if (state->split)
1357                                                 break;
1358                                 }
1359                                 if (i < sband->n_channels)
1360                                         state->chan_start = i + 2;
1361                                 else
1362                                         state->chan_start = 0;
1363                                 nla_nest_end(msg, nl_freqs);
1364                         }
1365
1366                         nla_nest_end(msg, nl_band);
1367
1368                         if (state->split) {
1369                                 /* start again here */
1370                                 if (state->chan_start)
1371                                         band--;
1372                                 break;
1373                         }
1374                 }
1375                 nla_nest_end(msg, nl_bands);
1376
1377                 if (band < IEEE80211_NUM_BANDS)
1378                         state->band_start = band + 1;
1379                 else
1380                         state->band_start = 0;
1381
1382                 /* if bands & channels are done, continue outside */
1383                 if (state->band_start == 0 && state->chan_start == 0)
1384                         state->split_start++;
1385                 if (state->split)
1386                         break;
1387         case 4:
1388                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1389                 if (!nl_cmds)
1390                         goto nla_put_failure;
1391
1392                 i = 0;
1393 #define CMD(op, n)                                                      \
1394                  do {                                                   \
1395                         if (dev->ops->op) {                             \
1396                                 i++;                                    \
1397                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1398                                         goto nla_put_failure;           \
1399                         }                                               \
1400                 } while (0)
1401
1402                 CMD(add_virtual_intf, NEW_INTERFACE);
1403                 CMD(change_virtual_intf, SET_INTERFACE);
1404                 CMD(add_key, NEW_KEY);
1405                 CMD(start_ap, START_AP);
1406                 CMD(add_station, NEW_STATION);
1407                 CMD(add_mpath, NEW_MPATH);
1408                 CMD(update_mesh_config, SET_MESH_CONFIG);
1409                 CMD(change_bss, SET_BSS);
1410                 CMD(auth, AUTHENTICATE);
1411                 CMD(assoc, ASSOCIATE);
1412                 CMD(deauth, DEAUTHENTICATE);
1413                 CMD(disassoc, DISASSOCIATE);
1414                 CMD(join_ibss, JOIN_IBSS);
1415                 CMD(join_mesh, JOIN_MESH);
1416                 CMD(set_pmksa, SET_PMKSA);
1417                 CMD(del_pmksa, DEL_PMKSA);
1418                 CMD(flush_pmksa, FLUSH_PMKSA);
1419                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1420                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1421                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1422                 CMD(mgmt_tx, FRAME);
1423                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1424                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1425                         i++;
1426                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1427                                 goto nla_put_failure;
1428                 }
1429                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1430                     dev->ops->join_mesh) {
1431                         i++;
1432                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1433                                 goto nla_put_failure;
1434                 }
1435                 CMD(set_wds_peer, SET_WDS_PEER);
1436                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1437                         CMD(tdls_mgmt, TDLS_MGMT);
1438                         CMD(tdls_oper, TDLS_OPER);
1439                 }
1440                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1441                         CMD(sched_scan_start, START_SCHED_SCAN);
1442                 CMD(probe_client, PROBE_CLIENT);
1443                 CMD(set_noack_map, SET_NOACK_MAP);
1444                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1445                         i++;
1446                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1447                                 goto nla_put_failure;
1448                 }
1449                 CMD(start_p2p_device, START_P2P_DEVICE);
1450                 CMD(set_mcast_rate, SET_MCAST_RATE);
1451                 if (state->split) {
1452                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1453                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1454                         if (dev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1455                                 CMD(channel_switch, CHANNEL_SWITCH);
1456                 }
1457
1458 #ifdef CONFIG_NL80211_TESTMODE
1459                 CMD(testmode_cmd, TESTMODE);
1460 #endif
1461
1462 #undef CMD
1463
1464                 if (dev->ops->connect || dev->ops->auth) {
1465                         i++;
1466                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1467                                 goto nla_put_failure;
1468                 }
1469
1470                 if (dev->ops->disconnect || dev->ops->deauth) {
1471                         i++;
1472                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1473                                 goto nla_put_failure;
1474                 }
1475
1476                 nla_nest_end(msg, nl_cmds);
1477                 state->split_start++;
1478                 if (state->split)
1479                         break;
1480         case 5:
1481                 if (dev->ops->remain_on_channel &&
1482                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1483                     nla_put_u32(msg,
1484                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1485                                 dev->wiphy.max_remain_on_channel_duration))
1486                         goto nla_put_failure;
1487
1488                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1489                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1490                         goto nla_put_failure;
1491
1492                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1493                         goto nla_put_failure;
1494                 state->split_start++;
1495                 if (state->split)
1496                         break;
1497         case 6:
1498 #ifdef CONFIG_PM
1499                 if (nl80211_send_wowlan(msg, dev, state->split))
1500                         goto nla_put_failure;
1501                 state->split_start++;
1502                 if (state->split)
1503                         break;
1504 #else
1505                 state->split_start++;
1506 #endif
1507         case 7:
1508                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1509                                         dev->wiphy.software_iftypes))
1510                         goto nla_put_failure;
1511
1512                 if (nl80211_put_iface_combinations(&dev->wiphy, msg,
1513                                                    state->split))
1514                         goto nla_put_failure;
1515
1516                 state->split_start++;
1517                 if (state->split)
1518                         break;
1519         case 8:
1520                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1521                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1522                                 dev->wiphy.ap_sme_capa))
1523                         goto nla_put_failure;
1524
1525                 features = dev->wiphy.features;
1526                 /*
1527                  * We can only add the per-channel limit information if the
1528                  * dump is split, otherwise it makes it too big. Therefore
1529                  * only advertise it in that case.
1530                  */
1531                 if (state->split)
1532                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1533                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1534                         goto nla_put_failure;
1535
1536                 if (dev->wiphy.ht_capa_mod_mask &&
1537                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1538                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1539                             dev->wiphy.ht_capa_mod_mask))
1540                         goto nla_put_failure;
1541
1542                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1543                     dev->wiphy.max_acl_mac_addrs &&
1544                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1545                                 dev->wiphy.max_acl_mac_addrs))
1546                         goto nla_put_failure;
1547
1548                 /*
1549                  * Any information below this point is only available to
1550                  * applications that can deal with it being split. This
1551                  * helps ensure that newly added capabilities don't break
1552                  * older tools by overrunning their buffers.
1553                  *
1554                  * We still increment split_start so that in the split
1555                  * case we'll continue with more data in the next round,
1556                  * but break unconditionally so unsplit data stops here.
1557                  */
1558                 state->split_start++;
1559                 break;
1560         case 9:
1561                 if (dev->wiphy.extended_capabilities &&
1562                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1563                              dev->wiphy.extended_capabilities_len,
1564                              dev->wiphy.extended_capabilities) ||
1565                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1566                              dev->wiphy.extended_capabilities_len,
1567                              dev->wiphy.extended_capabilities_mask)))
1568                         goto nla_put_failure;
1569
1570                 if (dev->wiphy.vht_capa_mod_mask &&
1571                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1572                             sizeof(*dev->wiphy.vht_capa_mod_mask),
1573                             dev->wiphy.vht_capa_mod_mask))
1574                         goto nla_put_failure;
1575
1576                 state->split_start++;
1577                 break;
1578         case 10:
1579                 if (nl80211_send_coalesce(msg, dev))
1580                         goto nla_put_failure;
1581
1582                 /* done */
1583                 state->split_start = 0;
1584                 break;
1585         }
1586         return genlmsg_end(msg, hdr);
1587
1588  nla_put_failure:
1589         genlmsg_cancel(msg, hdr);
1590         return -EMSGSIZE;
1591 }
1592
1593 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1594                                     struct netlink_callback *cb,
1595                                     struct nl80211_dump_wiphy_state *state)
1596 {
1597         struct nlattr **tb = nl80211_fam.attrbuf;
1598         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1599                               tb, nl80211_fam.maxattr, nl80211_policy);
1600         /* ignore parse errors for backward compatibility */
1601         if (ret)
1602                 return 0;
1603
1604         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1605         if (tb[NL80211_ATTR_WIPHY])
1606                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1607         if (tb[NL80211_ATTR_WDEV])
1608                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1609         if (tb[NL80211_ATTR_IFINDEX]) {
1610                 struct net_device *netdev;
1611                 struct cfg80211_registered_device *rdev;
1612                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1613
1614                 netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1615                 if (!netdev)
1616                         return -ENODEV;
1617                 if (netdev->ieee80211_ptr) {
1618                         rdev = wiphy_to_dev(
1619                                 netdev->ieee80211_ptr->wiphy);
1620                         state->filter_wiphy = rdev->wiphy_idx;
1621                 }
1622                 dev_put(netdev);
1623         }
1624
1625         return 0;
1626 }
1627
1628 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1629 {
1630         int idx = 0, ret;
1631         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1632         struct cfg80211_registered_device *dev;
1633
1634         rtnl_lock();
1635         if (!state) {
1636                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1637                 if (!state) {
1638                         rtnl_unlock();
1639                         return -ENOMEM;
1640                 }
1641                 state->filter_wiphy = -1;
1642                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1643                 if (ret) {
1644                         kfree(state);
1645                         rtnl_unlock();
1646                         return ret;
1647                 }
1648                 cb->args[0] = (long)state;
1649         }
1650
1651         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1652                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1653                         continue;
1654                 if (++idx <= state->start)
1655                         continue;
1656                 if (state->filter_wiphy != -1 &&
1657                     state->filter_wiphy != dev->wiphy_idx)
1658                         continue;
1659                 /* attempt to fit multiple wiphy data chunks into the skb */
1660                 do {
1661                         ret = nl80211_send_wiphy(dev, skb,
1662                                                  NETLINK_CB(cb->skb).portid,
1663                                                  cb->nlh->nlmsg_seq,
1664                                                  NLM_F_MULTI, state);
1665                         if (ret < 0) {
1666                                 /*
1667                                  * If sending the wiphy data didn't fit (ENOBUFS
1668                                  * or EMSGSIZE returned), this SKB is still
1669                                  * empty (so it's not too big because another
1670                                  * wiphy dataset is already in the skb) and
1671                                  * we've not tried to adjust the dump allocation
1672                                  * yet ... then adjust the alloc size to be
1673                                  * bigger, and return 1 but with the empty skb.
1674                                  * This results in an empty message being RX'ed
1675                                  * in userspace, but that is ignored.
1676                                  *
1677                                  * We can then retry with the larger buffer.
1678                                  */
1679                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1680                                     !skb->len &&
1681                                     cb->min_dump_alloc < 4096) {
1682                                         cb->min_dump_alloc = 4096;
1683                                         rtnl_unlock();
1684                                         return 1;
1685                                 }
1686                                 idx--;
1687                                 break;
1688                         }
1689                 } while (state->split_start > 0);
1690                 break;
1691         }
1692         rtnl_unlock();
1693
1694         state->start = idx;
1695
1696         return skb->len;
1697 }
1698
1699 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1700 {
1701         kfree((void *)cb->args[0]);
1702         return 0;
1703 }
1704
1705 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1706 {
1707         struct sk_buff *msg;
1708         struct cfg80211_registered_device *dev = info->user_ptr[0];
1709         struct nl80211_dump_wiphy_state state = {};
1710
1711         msg = nlmsg_new(4096, GFP_KERNEL);
1712         if (!msg)
1713                 return -ENOMEM;
1714
1715         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1716                                &state) < 0) {
1717                 nlmsg_free(msg);
1718                 return -ENOBUFS;
1719         }
1720
1721         return genlmsg_reply(msg, info);
1722 }
1723
1724 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1725         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1726         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1727         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1728         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1729         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1730 };
1731
1732 static int parse_txq_params(struct nlattr *tb[],
1733                             struct ieee80211_txq_params *txq_params)
1734 {
1735         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1736             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1737             !tb[NL80211_TXQ_ATTR_AIFS])
1738                 return -EINVAL;
1739
1740         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1741         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1742         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1743         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1744         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1745
1746         if (txq_params->ac >= NL80211_NUM_ACS)
1747                 return -EINVAL;
1748
1749         return 0;
1750 }
1751
1752 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1753 {
1754         /*
1755          * You can only set the channel explicitly for WDS interfaces,
1756          * all others have their channel managed via their respective
1757          * "establish a connection" command (connect, join, ...)
1758          *
1759          * For AP/GO and mesh mode, the channel can be set with the
1760          * channel userspace API, but is only stored and passed to the
1761          * low-level driver when the AP starts or the mesh is joined.
1762          * This is for backward compatibility, userspace can also give
1763          * the channel in the start-ap or join-mesh commands instead.
1764          *
1765          * Monitors are special as they are normally slaved to
1766          * whatever else is going on, so they have their own special
1767          * operation to set the monitor channel if possible.
1768          */
1769         return !wdev ||
1770                 wdev->iftype == NL80211_IFTYPE_AP ||
1771                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1772                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1773                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1774 }
1775
1776 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1777                                  struct genl_info *info,
1778                                  struct cfg80211_chan_def *chandef)
1779 {
1780         u32 control_freq;
1781
1782         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1783                 return -EINVAL;
1784
1785         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1786
1787         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1788         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1789         chandef->center_freq1 = control_freq;
1790         chandef->center_freq2 = 0;
1791
1792         /* Primary channel not allowed */
1793         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1794                 return -EINVAL;
1795
1796         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1797                 enum nl80211_channel_type chantype;
1798
1799                 chantype = nla_get_u32(
1800                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1801
1802                 switch (chantype) {
1803                 case NL80211_CHAN_NO_HT:
1804                 case NL80211_CHAN_HT20:
1805                 case NL80211_CHAN_HT40PLUS:
1806                 case NL80211_CHAN_HT40MINUS:
1807                         cfg80211_chandef_create(chandef, chandef->chan,
1808                                                 chantype);
1809                         break;
1810                 default:
1811                         return -EINVAL;
1812                 }
1813         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1814                 chandef->width =
1815                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1816                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1817                         chandef->center_freq1 =
1818                                 nla_get_u32(
1819                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1820                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1821                         chandef->center_freq2 =
1822                                 nla_get_u32(
1823                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1824         }
1825
1826         if (!cfg80211_chandef_valid(chandef))
1827                 return -EINVAL;
1828
1829         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1830                                      IEEE80211_CHAN_DISABLED))
1831                 return -EINVAL;
1832
1833         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
1834              chandef->width == NL80211_CHAN_WIDTH_10) &&
1835             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
1836                 return -EINVAL;
1837
1838         return 0;
1839 }
1840
1841 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1842                                  struct wireless_dev *wdev,
1843                                  struct genl_info *info)
1844 {
1845         struct cfg80211_chan_def chandef;
1846         int result;
1847         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1848
1849         if (wdev)
1850                 iftype = wdev->iftype;
1851
1852         if (!nl80211_can_set_dev_channel(wdev))
1853                 return -EOPNOTSUPP;
1854
1855         result = nl80211_parse_chandef(rdev, info, &chandef);
1856         if (result)
1857                 return result;
1858
1859         switch (iftype) {
1860         case NL80211_IFTYPE_AP:
1861         case NL80211_IFTYPE_P2P_GO:
1862                 if (wdev->beacon_interval) {
1863                         result = -EBUSY;
1864                         break;
1865                 }
1866                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1867                         result = -EINVAL;
1868                         break;
1869                 }
1870                 wdev->preset_chandef = chandef;
1871                 result = 0;
1872                 break;
1873         case NL80211_IFTYPE_MESH_POINT:
1874                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1875                 break;
1876         case NL80211_IFTYPE_MONITOR:
1877                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1878                 break;
1879         default:
1880                 result = -EINVAL;
1881         }
1882
1883         return result;
1884 }
1885
1886 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1887 {
1888         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1889         struct net_device *netdev = info->user_ptr[1];
1890
1891         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1892 }
1893
1894 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1895 {
1896         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1897         struct net_device *dev = info->user_ptr[1];
1898         struct wireless_dev *wdev = dev->ieee80211_ptr;
1899         const u8 *bssid;
1900
1901         if (!info->attrs[NL80211_ATTR_MAC])
1902                 return -EINVAL;
1903
1904         if (netif_running(dev))
1905                 return -EBUSY;
1906
1907         if (!rdev->ops->set_wds_peer)
1908                 return -EOPNOTSUPP;
1909
1910         if (wdev->iftype != NL80211_IFTYPE_WDS)
1911                 return -EOPNOTSUPP;
1912
1913         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1914         return rdev_set_wds_peer(rdev, dev, bssid);
1915 }
1916
1917
1918 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1919 {
1920         struct cfg80211_registered_device *rdev;
1921         struct net_device *netdev = NULL;
1922         struct wireless_dev *wdev;
1923         int result = 0, rem_txq_params = 0;
1924         struct nlattr *nl_txq_params;
1925         u32 changed;
1926         u8 retry_short = 0, retry_long = 0;
1927         u32 frag_threshold = 0, rts_threshold = 0;
1928         u8 coverage_class = 0;
1929
1930         ASSERT_RTNL();
1931
1932         /*
1933          * Try to find the wiphy and netdev. Normally this
1934          * function shouldn't need the netdev, but this is
1935          * done for backward compatibility -- previously
1936          * setting the channel was done per wiphy, but now
1937          * it is per netdev. Previous userland like hostapd
1938          * also passed a netdev to set_wiphy, so that it is
1939          * possible to let that go to the right netdev!
1940          */
1941
1942         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1943                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1944
1945                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1946                 if (netdev && netdev->ieee80211_ptr)
1947                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1948                 else
1949                         netdev = NULL;
1950         }
1951
1952         if (!netdev) {
1953                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1954                                                   info->attrs);
1955                 if (IS_ERR(rdev))
1956                         return PTR_ERR(rdev);
1957                 wdev = NULL;
1958                 netdev = NULL;
1959                 result = 0;
1960         } else
1961                 wdev = netdev->ieee80211_ptr;
1962
1963         /*
1964          * end workaround code, by now the rdev is available
1965          * and locked, and wdev may or may not be NULL.
1966          */
1967
1968         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1969                 result = cfg80211_dev_rename(
1970                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1971
1972         if (result)
1973                 goto bad_res;
1974
1975         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1976                 struct ieee80211_txq_params txq_params;
1977                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1978
1979                 if (!rdev->ops->set_txq_params) {
1980                         result = -EOPNOTSUPP;
1981                         goto bad_res;
1982                 }
1983
1984                 if (!netdev) {
1985                         result = -EINVAL;
1986                         goto bad_res;
1987                 }
1988
1989                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1990                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1991                         result = -EINVAL;
1992                         goto bad_res;
1993                 }
1994
1995                 if (!netif_running(netdev)) {
1996                         result = -ENETDOWN;
1997                         goto bad_res;
1998                 }
1999
2000                 nla_for_each_nested(nl_txq_params,
2001                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2002                                     rem_txq_params) {
2003                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2004                                   nla_data(nl_txq_params),
2005                                   nla_len(nl_txq_params),
2006                                   txq_params_policy);
2007                         result = parse_txq_params(tb, &txq_params);
2008                         if (result)
2009                                 goto bad_res;
2010
2011                         result = rdev_set_txq_params(rdev, netdev,
2012                                                      &txq_params);
2013                         if (result)
2014                                 goto bad_res;
2015                 }
2016         }
2017
2018         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2019                 result = __nl80211_set_channel(rdev,
2020                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
2021                                 info);
2022                 if (result)
2023                         goto bad_res;
2024         }
2025
2026         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2027                 struct wireless_dev *txp_wdev = wdev;
2028                 enum nl80211_tx_power_setting type;
2029                 int idx, mbm = 0;
2030
2031                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2032                         txp_wdev = NULL;
2033
2034                 if (!rdev->ops->set_tx_power) {
2035                         result = -EOPNOTSUPP;
2036                         goto bad_res;
2037                 }
2038
2039                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2040                 type = nla_get_u32(info->attrs[idx]);
2041
2042                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2043                     (type != NL80211_TX_POWER_AUTOMATIC)) {
2044                         result = -EINVAL;
2045                         goto bad_res;
2046                 }
2047
2048                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2049                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2050                         mbm = nla_get_u32(info->attrs[idx]);
2051                 }
2052
2053                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2054                 if (result)
2055                         goto bad_res;
2056         }
2057
2058         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2059             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2060                 u32 tx_ant, rx_ant;
2061                 if ((!rdev->wiphy.available_antennas_tx &&
2062                      !rdev->wiphy.available_antennas_rx) ||
2063                     !rdev->ops->set_antenna) {
2064                         result = -EOPNOTSUPP;
2065                         goto bad_res;
2066                 }
2067
2068                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2069                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2070
2071                 /* reject antenna configurations which don't match the
2072                  * available antenna masks, except for the "all" mask */
2073                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2074                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
2075                         result = -EINVAL;
2076                         goto bad_res;
2077                 }
2078
2079                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2080                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2081
2082                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2083                 if (result)
2084                         goto bad_res;
2085         }
2086
2087         changed = 0;
2088
2089         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2090                 retry_short = nla_get_u8(
2091                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2092                 if (retry_short == 0) {
2093                         result = -EINVAL;
2094                         goto bad_res;
2095                 }
2096                 changed |= WIPHY_PARAM_RETRY_SHORT;
2097         }
2098
2099         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2100                 retry_long = nla_get_u8(
2101                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2102                 if (retry_long == 0) {
2103                         result = -EINVAL;
2104                         goto bad_res;
2105                 }
2106                 changed |= WIPHY_PARAM_RETRY_LONG;
2107         }
2108
2109         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2110                 frag_threshold = nla_get_u32(
2111                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2112                 if (frag_threshold < 256) {
2113                         result = -EINVAL;
2114                         goto bad_res;
2115                 }
2116                 if (frag_threshold != (u32) -1) {
2117                         /*
2118                          * Fragments (apart from the last one) are required to
2119                          * have even length. Make the fragmentation code
2120                          * simpler by stripping LSB should someone try to use
2121                          * odd threshold value.
2122                          */
2123                         frag_threshold &= ~0x1;
2124                 }
2125                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2126         }
2127
2128         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2129                 rts_threshold = nla_get_u32(
2130                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2131                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2132         }
2133
2134         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2135                 coverage_class = nla_get_u8(
2136                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2137                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2138         }
2139
2140         if (changed) {
2141                 u8 old_retry_short, old_retry_long;
2142                 u32 old_frag_threshold, old_rts_threshold;
2143                 u8 old_coverage_class;
2144
2145                 if (!rdev->ops->set_wiphy_params) {
2146                         result = -EOPNOTSUPP;
2147                         goto bad_res;
2148                 }
2149
2150                 old_retry_short = rdev->wiphy.retry_short;
2151                 old_retry_long = rdev->wiphy.retry_long;
2152                 old_frag_threshold = rdev->wiphy.frag_threshold;
2153                 old_rts_threshold = rdev->wiphy.rts_threshold;
2154                 old_coverage_class = rdev->wiphy.coverage_class;
2155
2156                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2157                         rdev->wiphy.retry_short = retry_short;
2158                 if (changed & WIPHY_PARAM_RETRY_LONG)
2159                         rdev->wiphy.retry_long = retry_long;
2160                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2161                         rdev->wiphy.frag_threshold = frag_threshold;
2162                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2163                         rdev->wiphy.rts_threshold = rts_threshold;
2164                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2165                         rdev->wiphy.coverage_class = coverage_class;
2166
2167                 result = rdev_set_wiphy_params(rdev, changed);
2168                 if (result) {
2169                         rdev->wiphy.retry_short = old_retry_short;
2170                         rdev->wiphy.retry_long = old_retry_long;
2171                         rdev->wiphy.frag_threshold = old_frag_threshold;
2172                         rdev->wiphy.rts_threshold = old_rts_threshold;
2173                         rdev->wiphy.coverage_class = old_coverage_class;
2174                 }
2175         }
2176
2177  bad_res:
2178         if (netdev)
2179                 dev_put(netdev);
2180         return result;
2181 }
2182
2183 static inline u64 wdev_id(struct wireless_dev *wdev)
2184 {
2185         return (u64)wdev->identifier |
2186                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2187 }
2188
2189 static int nl80211_send_chandef(struct sk_buff *msg,
2190                                  struct cfg80211_chan_def *chandef)
2191 {
2192         WARN_ON(!cfg80211_chandef_valid(chandef));
2193
2194         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2195                         chandef->chan->center_freq))
2196                 return -ENOBUFS;
2197         switch (chandef->width) {
2198         case NL80211_CHAN_WIDTH_20_NOHT:
2199         case NL80211_CHAN_WIDTH_20:
2200         case NL80211_CHAN_WIDTH_40:
2201                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2202                                 cfg80211_get_chandef_type(chandef)))
2203                         return -ENOBUFS;
2204                 break;
2205         default:
2206                 break;
2207         }
2208         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2209                 return -ENOBUFS;
2210         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2211                 return -ENOBUFS;
2212         if (chandef->center_freq2 &&
2213             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2214                 return -ENOBUFS;
2215         return 0;
2216 }
2217
2218 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2219                               struct cfg80211_registered_device *rdev,
2220                               struct wireless_dev *wdev)
2221 {
2222         struct net_device *dev = wdev->netdev;
2223         void *hdr;
2224
2225         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2226         if (!hdr)
2227                 return -1;
2228
2229         if (dev &&
2230             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2231              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2232                 goto nla_put_failure;
2233
2234         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2235             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2236             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2237             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2238             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2239                         rdev->devlist_generation ^
2240                         (cfg80211_rdev_list_generation << 2)))
2241                 goto nla_put_failure;
2242
2243         if (rdev->ops->get_channel) {
2244                 int ret;
2245                 struct cfg80211_chan_def chandef;
2246
2247                 ret = rdev_get_channel(rdev, wdev, &chandef);
2248                 if (ret == 0) {
2249                         if (nl80211_send_chandef(msg, &chandef))
2250                                 goto nla_put_failure;
2251                 }
2252         }
2253
2254         if (wdev->ssid_len) {
2255                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2256                         goto nla_put_failure;
2257         }
2258
2259         return genlmsg_end(msg, hdr);
2260
2261  nla_put_failure:
2262         genlmsg_cancel(msg, hdr);
2263         return -EMSGSIZE;
2264 }
2265
2266 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2267 {
2268         int wp_idx = 0;
2269         int if_idx = 0;
2270         int wp_start = cb->args[0];
2271         int if_start = cb->args[1];
2272         struct cfg80211_registered_device *rdev;
2273         struct wireless_dev *wdev;
2274
2275         rtnl_lock();
2276         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2277                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2278                         continue;
2279                 if (wp_idx < wp_start) {
2280                         wp_idx++;
2281                         continue;
2282                 }
2283                 if_idx = 0;
2284
2285                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2286                         if (if_idx < if_start) {
2287                                 if_idx++;
2288                                 continue;
2289                         }
2290                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2291                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2292                                                rdev, wdev) < 0) {
2293                                 goto out;
2294                         }
2295                         if_idx++;
2296                 }
2297
2298                 wp_idx++;
2299         }
2300  out:
2301         rtnl_unlock();
2302
2303         cb->args[0] = wp_idx;
2304         cb->args[1] = if_idx;
2305
2306         return skb->len;
2307 }
2308
2309 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2310 {
2311         struct sk_buff *msg;
2312         struct cfg80211_registered_device *dev = info->user_ptr[0];
2313         struct wireless_dev *wdev = info->user_ptr[1];
2314
2315         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2316         if (!msg)
2317                 return -ENOMEM;
2318
2319         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2320                                dev, wdev) < 0) {
2321                 nlmsg_free(msg);
2322                 return -ENOBUFS;
2323         }
2324
2325         return genlmsg_reply(msg, info);
2326 }
2327
2328 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2329         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2330         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2331         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2332         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2333         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2334         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2335 };
2336
2337 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2338 {
2339         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2340         int flag;
2341
2342         *mntrflags = 0;
2343
2344         if (!nla)
2345                 return -EINVAL;
2346
2347         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2348                              nla, mntr_flags_policy))
2349                 return -EINVAL;
2350
2351         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2352                 if (flags[flag])
2353                         *mntrflags |= (1<<flag);
2354
2355         return 0;
2356 }
2357
2358 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2359                                struct net_device *netdev, u8 use_4addr,
2360                                enum nl80211_iftype iftype)
2361 {
2362         if (!use_4addr) {
2363                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2364                         return -EBUSY;
2365                 return 0;
2366         }
2367
2368         switch (iftype) {
2369         case NL80211_IFTYPE_AP_VLAN:
2370                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2371                         return 0;
2372                 break;
2373         case NL80211_IFTYPE_STATION:
2374                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2375                         return 0;
2376                 break;
2377         default:
2378                 break;
2379         }
2380
2381         return -EOPNOTSUPP;
2382 }
2383
2384 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2385 {
2386         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2387         struct vif_params params;
2388         int err;
2389         enum nl80211_iftype otype, ntype;
2390         struct net_device *dev = info->user_ptr[1];
2391         u32 _flags, *flags = NULL;
2392         bool change = false;
2393
2394         memset(&params, 0, sizeof(params));
2395
2396         otype = ntype = dev->ieee80211_ptr->iftype;
2397
2398         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2399                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2400                 if (otype != ntype)
2401                         change = true;
2402                 if (ntype > NL80211_IFTYPE_MAX)
2403                         return -EINVAL;
2404         }
2405
2406         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2407                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2408
2409                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2410                         return -EINVAL;
2411                 if (netif_running(dev))
2412                         return -EBUSY;
2413
2414                 wdev_lock(wdev);
2415                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2416                              IEEE80211_MAX_MESH_ID_LEN);
2417                 wdev->mesh_id_up_len =
2418                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2419                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2420                        wdev->mesh_id_up_len);
2421                 wdev_unlock(wdev);
2422         }
2423
2424         if (info->attrs[NL80211_ATTR_4ADDR]) {
2425                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2426                 change = true;
2427                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2428                 if (err)
2429                         return err;
2430         } else {
2431                 params.use_4addr = -1;
2432         }
2433
2434         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2435                 if (ntype != NL80211_IFTYPE_MONITOR)
2436                         return -EINVAL;
2437                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2438                                           &_flags);
2439                 if (err)
2440                         return err;
2441
2442                 flags = &_flags;
2443                 change = true;
2444         }
2445
2446         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2447             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2448                 return -EOPNOTSUPP;
2449
2450         if (change)
2451                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2452         else
2453                 err = 0;
2454
2455         if (!err && params.use_4addr != -1)
2456                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2457
2458         return err;
2459 }
2460
2461 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2462 {
2463         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2464         struct vif_params params;
2465         struct wireless_dev *wdev;
2466         struct sk_buff *msg;
2467         int err;
2468         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2469         u32 flags;
2470
2471         memset(&params, 0, sizeof(params));
2472
2473         if (!info->attrs[NL80211_ATTR_IFNAME])
2474                 return -EINVAL;
2475
2476         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2477                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2478                 if (type > NL80211_IFTYPE_MAX)
2479                         return -EINVAL;
2480         }
2481
2482         if (!rdev->ops->add_virtual_intf ||
2483             !(rdev->wiphy.interface_modes & (1 << type)))
2484                 return -EOPNOTSUPP;
2485
2486         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2487                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2488                            ETH_ALEN);
2489                 if (!is_valid_ether_addr(params.macaddr))
2490                         return -EADDRNOTAVAIL;
2491         }
2492
2493         if (info->attrs[NL80211_ATTR_4ADDR]) {
2494                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2495                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2496                 if (err)
2497                         return err;
2498         }
2499
2500         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2501         if (!msg)
2502                 return -ENOMEM;
2503
2504         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2505                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2506                                   &flags);
2507
2508         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2509             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2510                 return -EOPNOTSUPP;
2511
2512         wdev = rdev_add_virtual_intf(rdev,
2513                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2514                                 type, err ? NULL : &flags, &params);
2515         if (IS_ERR(wdev)) {
2516                 nlmsg_free(msg);
2517                 return PTR_ERR(wdev);
2518         }
2519
2520         switch (type) {
2521         case NL80211_IFTYPE_MESH_POINT:
2522                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2523                         break;
2524                 wdev_lock(wdev);
2525                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2526                              IEEE80211_MAX_MESH_ID_LEN);
2527                 wdev->mesh_id_up_len =
2528                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2529                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2530                        wdev->mesh_id_up_len);
2531                 wdev_unlock(wdev);
2532                 break;
2533         case NL80211_IFTYPE_P2P_DEVICE:
2534                 /*
2535                  * P2P Device doesn't have a netdev, so doesn't go
2536                  * through the netdev notifier and must be added here
2537                  */
2538                 mutex_init(&wdev->mtx);
2539                 INIT_LIST_HEAD(&wdev->event_list);
2540                 spin_lock_init(&wdev->event_lock);
2541                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2542                 spin_lock_init(&wdev->mgmt_registrations_lock);
2543
2544                 wdev->identifier = ++rdev->wdev_id;
2545                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2546                 rdev->devlist_generation++;
2547                 break;
2548         default:
2549                 break;
2550         }
2551
2552         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2553                                rdev, wdev) < 0) {
2554                 nlmsg_free(msg);
2555                 return -ENOBUFS;
2556         }
2557
2558         return genlmsg_reply(msg, info);
2559 }
2560
2561 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2562 {
2563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2564         struct wireless_dev *wdev = info->user_ptr[1];
2565
2566         if (!rdev->ops->del_virtual_intf)
2567                 return -EOPNOTSUPP;
2568
2569         /*
2570          * If we remove a wireless device without a netdev then clear
2571          * user_ptr[1] so that nl80211_post_doit won't dereference it
2572          * to check if it needs to do dev_put(). Otherwise it crashes
2573          * since the wdev has been freed, unlike with a netdev where
2574          * we need the dev_put() for the netdev to really be freed.
2575          */
2576         if (!wdev->netdev)
2577                 info->user_ptr[1] = NULL;
2578
2579         return rdev_del_virtual_intf(rdev, wdev);
2580 }
2581
2582 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2583 {
2584         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2585         struct net_device *dev = info->user_ptr[1];
2586         u16 noack_map;
2587
2588         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2589                 return -EINVAL;
2590
2591         if (!rdev->ops->set_noack_map)
2592                 return -EOPNOTSUPP;
2593
2594         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2595
2596         return rdev_set_noack_map(rdev, dev, noack_map);
2597 }
2598
2599 struct get_key_cookie {
2600         struct sk_buff *msg;
2601         int error;
2602         int idx;
2603 };
2604
2605 static void get_key_callback(void *c, struct key_params *params)
2606 {
2607         struct nlattr *key;
2608         struct get_key_cookie *cookie = c;
2609
2610         if ((params->key &&
2611              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2612                      params->key_len, params->key)) ||
2613             (params->seq &&
2614              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2615                      params->seq_len, params->seq)) ||
2616             (params->cipher &&
2617              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2618                          params->cipher)))
2619                 goto nla_put_failure;
2620
2621         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2622         if (!key)
2623                 goto nla_put_failure;
2624
2625         if ((params->key &&
2626              nla_put(cookie->msg, NL80211_KEY_DATA,
2627                      params->key_len, params->key)) ||
2628             (params->seq &&
2629              nla_put(cookie->msg, NL80211_KEY_SEQ,
2630                      params->seq_len, params->seq)) ||
2631             (params->cipher &&
2632              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2633                          params->cipher)))
2634                 goto nla_put_failure;
2635
2636         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2637                 goto nla_put_failure;
2638
2639         nla_nest_end(cookie->msg, key);
2640
2641         return;
2642  nla_put_failure:
2643         cookie->error = 1;
2644 }
2645
2646 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2647 {
2648         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2649         int err;
2650         struct net_device *dev = info->user_ptr[1];
2651         u8 key_idx = 0;
2652         const u8 *mac_addr = NULL;
2653         bool pairwise;
2654         struct get_key_cookie cookie = {
2655                 .error = 0,
2656         };
2657         void *hdr;
2658         struct sk_buff *msg;
2659
2660         if (info->attrs[NL80211_ATTR_KEY_IDX])
2661                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2662
2663         if (key_idx > 5)
2664                 return -EINVAL;
2665
2666         if (info->attrs[NL80211_ATTR_MAC])
2667                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2668
2669         pairwise = !!mac_addr;
2670         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2671                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2672                 if (kt >= NUM_NL80211_KEYTYPES)
2673                         return -EINVAL;
2674                 if (kt != NL80211_KEYTYPE_GROUP &&
2675                     kt != NL80211_KEYTYPE_PAIRWISE)
2676                         return -EINVAL;
2677                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2678         }
2679
2680         if (!rdev->ops->get_key)
2681                 return -EOPNOTSUPP;
2682
2683         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2684         if (!msg)
2685                 return -ENOMEM;
2686
2687         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2688                              NL80211_CMD_NEW_KEY);
2689         if (!hdr)
2690                 goto nla_put_failure;
2691
2692         cookie.msg = msg;
2693         cookie.idx = key_idx;
2694
2695         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2696             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2697                 goto nla_put_failure;
2698         if (mac_addr &&
2699             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2700                 goto nla_put_failure;
2701
2702         if (pairwise && mac_addr &&
2703             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2704                 return -ENOENT;
2705
2706         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2707                            get_key_callback);
2708
2709         if (err)
2710                 goto free_msg;
2711
2712         if (cookie.error)
2713                 goto nla_put_failure;
2714
2715         genlmsg_end(msg, hdr);
2716         return genlmsg_reply(msg, info);
2717
2718  nla_put_failure:
2719         err = -ENOBUFS;
2720  free_msg:
2721         nlmsg_free(msg);
2722         return err;
2723 }
2724
2725 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2726 {
2727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2728         struct key_parse key;
2729         int err;
2730         struct net_device *dev = info->user_ptr[1];
2731
2732         err = nl80211_parse_key(info, &key);
2733         if (err)
2734                 return err;
2735
2736         if (key.idx < 0)
2737                 return -EINVAL;
2738
2739         /* only support setting default key */
2740         if (!key.def && !key.defmgmt)
2741                 return -EINVAL;
2742
2743         wdev_lock(dev->ieee80211_ptr);
2744
2745         if (key.def) {
2746                 if (!rdev->ops->set_default_key) {
2747                         err = -EOPNOTSUPP;
2748                         goto out;
2749                 }
2750
2751                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2752                 if (err)
2753                         goto out;
2754
2755                 err = rdev_set_default_key(rdev, dev, key.idx,
2756                                                  key.def_uni, key.def_multi);
2757
2758                 if (err)
2759                         goto out;
2760
2761 #ifdef CONFIG_CFG80211_WEXT
2762                 dev->ieee80211_ptr->wext.default_key = key.idx;
2763 #endif
2764         } else {
2765                 if (key.def_uni || !key.def_multi) {
2766                         err = -EINVAL;
2767                         goto out;
2768                 }
2769
2770                 if (!rdev->ops->set_default_mgmt_key) {
2771                         err = -EOPNOTSUPP;
2772                         goto out;
2773                 }
2774
2775                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2776                 if (err)
2777                         goto out;
2778
2779                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2780                 if (err)
2781                         goto out;
2782
2783 #ifdef CONFIG_CFG80211_WEXT
2784                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2785 #endif
2786         }
2787
2788  out:
2789         wdev_unlock(dev->ieee80211_ptr);
2790
2791         return err;
2792 }
2793
2794 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2795 {
2796         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2797         int err;
2798         struct net_device *dev = info->user_ptr[1];
2799         struct key_parse key;
2800         const u8 *mac_addr = NULL;
2801
2802         err = nl80211_parse_key(info, &key);
2803         if (err)
2804                 return err;
2805
2806         if (!key.p.key)
2807                 return -EINVAL;
2808
2809         if (info->attrs[NL80211_ATTR_MAC])
2810                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2811
2812         if (key.type == -1) {
2813                 if (mac_addr)
2814                         key.type = NL80211_KEYTYPE_PAIRWISE;
2815                 else
2816                         key.type = NL80211_KEYTYPE_GROUP;
2817         }
2818
2819         /* for now */
2820         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2821             key.type != NL80211_KEYTYPE_GROUP)
2822                 return -EINVAL;
2823
2824         if (!rdev->ops->add_key)
2825                 return -EOPNOTSUPP;
2826
2827         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2828                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2829                                            mac_addr))
2830                 return -EINVAL;
2831
2832         wdev_lock(dev->ieee80211_ptr);
2833         err = nl80211_key_allowed(dev->ieee80211_ptr);
2834         if (!err)
2835                 err = rdev_add_key(rdev, dev, key.idx,
2836                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2837                                     mac_addr, &key.p);
2838         wdev_unlock(dev->ieee80211_ptr);
2839
2840         return err;
2841 }
2842
2843 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2844 {
2845         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2846         int err;
2847         struct net_device *dev = info->user_ptr[1];
2848         u8 *mac_addr = NULL;
2849         struct key_parse key;
2850
2851         err = nl80211_parse_key(info, &key);
2852         if (err)
2853                 return err;
2854
2855         if (info->attrs[NL80211_ATTR_MAC])
2856                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2857
2858         if (key.type == -1) {
2859                 if (mac_addr)
2860                         key.type = NL80211_KEYTYPE_PAIRWISE;
2861                 else
2862                         key.type = NL80211_KEYTYPE_GROUP;
2863         }
2864
2865         /* for now */
2866         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2867             key.type != NL80211_KEYTYPE_GROUP)
2868                 return -EINVAL;
2869
2870         if (!rdev->ops->del_key)
2871                 return -EOPNOTSUPP;
2872
2873         wdev_lock(dev->ieee80211_ptr);
2874         err = nl80211_key_allowed(dev->ieee80211_ptr);
2875
2876         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2877             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2878                 err = -ENOENT;
2879
2880         if (!err)
2881                 err = rdev_del_key(rdev, dev, key.idx,
2882                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2883                                    mac_addr);
2884
2885 #ifdef CONFIG_CFG80211_WEXT
2886         if (!err) {
2887                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2888                         dev->ieee80211_ptr->wext.default_key = -1;
2889                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2890                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2891         }
2892 #endif
2893         wdev_unlock(dev->ieee80211_ptr);
2894
2895         return err;
2896 }
2897
2898 /* This function returns an error or the number of nested attributes */
2899 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2900 {
2901         struct nlattr *attr;
2902         int n_entries = 0, tmp;
2903
2904         nla_for_each_nested(attr, nl_attr, tmp) {
2905                 if (nla_len(attr) != ETH_ALEN)
2906                         return -EINVAL;
2907
2908                 n_entries++;
2909         }
2910
2911         return n_entries;
2912 }
2913
2914 /*
2915  * This function parses ACL information and allocates memory for ACL data.
2916  * On successful return, the calling function is responsible to free the
2917  * ACL buffer returned by this function.
2918  */
2919 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2920                                                 struct genl_info *info)
2921 {
2922         enum nl80211_acl_policy acl_policy;
2923         struct nlattr *attr;
2924         struct cfg80211_acl_data *acl;
2925         int i = 0, n_entries, tmp;
2926
2927         if (!wiphy->max_acl_mac_addrs)
2928                 return ERR_PTR(-EOPNOTSUPP);
2929
2930         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2931                 return ERR_PTR(-EINVAL);
2932
2933         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2934         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2935             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2936                 return ERR_PTR(-EINVAL);
2937
2938         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2939                 return ERR_PTR(-EINVAL);
2940
2941         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2942         if (n_entries < 0)
2943                 return ERR_PTR(n_entries);
2944
2945         if (n_entries > wiphy->max_acl_mac_addrs)
2946                 return ERR_PTR(-ENOTSUPP);
2947
2948         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2949                       GFP_KERNEL);
2950         if (!acl)
2951                 return ERR_PTR(-ENOMEM);
2952
2953         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2954                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2955                 i++;
2956         }
2957
2958         acl->n_acl_entries = n_entries;
2959         acl->acl_policy = acl_policy;
2960
2961         return acl;
2962 }
2963
2964 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2965 {
2966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2967         struct net_device *dev = info->user_ptr[1];
2968         struct cfg80211_acl_data *acl;
2969         int err;
2970
2971         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2972             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2973                 return -EOPNOTSUPP;
2974
2975         if (!dev->ieee80211_ptr->beacon_interval)
2976                 return -EINVAL;
2977
2978         acl = parse_acl_data(&rdev->wiphy, info);
2979         if (IS_ERR(acl))
2980                 return PTR_ERR(acl);
2981
2982         err = rdev_set_mac_acl(rdev, dev, acl);
2983
2984         kfree(acl);
2985
2986         return err;
2987 }
2988
2989 static int nl80211_parse_beacon(struct nlattr *attrs[],
2990                                 struct cfg80211_beacon_data *bcn)
2991 {
2992         bool haveinfo = false;
2993
2994         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
2995             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
2996             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2997             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2998                 return -EINVAL;
2999
3000         memset(bcn, 0, sizeof(*bcn));
3001
3002         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3003                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3004                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3005                 if (!bcn->head_len)
3006                         return -EINVAL;
3007                 haveinfo = true;
3008         }
3009
3010         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3011                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3012                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3013                 haveinfo = true;
3014         }
3015
3016         if (!haveinfo)
3017                 return -EINVAL;
3018
3019         if (attrs[NL80211_ATTR_IE]) {
3020                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3021                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3022         }
3023
3024         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3025                 bcn->proberesp_ies =
3026                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3027                 bcn->proberesp_ies_len =
3028                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3029         }
3030
3031         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3032                 bcn->assocresp_ies =
3033                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3034                 bcn->assocresp_ies_len =
3035                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3036         }
3037
3038         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3039                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3040                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3041         }
3042
3043         return 0;
3044 }
3045
3046 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3047                                    struct cfg80211_ap_settings *params)
3048 {
3049         struct wireless_dev *wdev;
3050         bool ret = false;
3051
3052         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3053                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3054                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3055                         continue;
3056
3057                 if (!wdev->preset_chandef.chan)
3058                         continue;
3059
3060                 params->chandef = wdev->preset_chandef;
3061                 ret = true;
3062                 break;
3063         }
3064
3065         return ret;
3066 }
3067
3068 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3069                                     enum nl80211_auth_type auth_type,
3070                                     enum nl80211_commands cmd)
3071 {
3072         if (auth_type > NL80211_AUTHTYPE_MAX)
3073                 return false;
3074
3075         switch (cmd) {
3076         case NL80211_CMD_AUTHENTICATE:
3077                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3078                     auth_type == NL80211_AUTHTYPE_SAE)
3079                         return false;
3080                 return true;
3081         case NL80211_CMD_CONNECT:
3082         case NL80211_CMD_START_AP:
3083                 /* SAE not supported yet */
3084                 if (auth_type == NL80211_AUTHTYPE_SAE)
3085                         return false;
3086                 return true;
3087         default:
3088                 return false;
3089         }
3090 }
3091
3092 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3093 {
3094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3095         struct net_device *dev = info->user_ptr[1];
3096         struct wireless_dev *wdev = dev->ieee80211_ptr;
3097         struct cfg80211_ap_settings params;
3098         int err;
3099         u8 radar_detect_width = 0;
3100
3101         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3102             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3103                 return -EOPNOTSUPP;
3104
3105         if (!rdev->ops->start_ap)
3106                 return -EOPNOTSUPP;
3107
3108         if (wdev->beacon_interval)
3109                 return -EALREADY;
3110
3111         memset(&params, 0, sizeof(params));
3112
3113         /* these are required for START_AP */
3114         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3115             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3116             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3117                 return -EINVAL;
3118
3119         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3120         if (err)
3121                 return err;
3122
3123         params.beacon_interval =
3124                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3125         params.dtim_period =
3126                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3127
3128         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3129         if (err)
3130                 return err;
3131
3132         /*
3133          * In theory, some of these attributes should be required here
3134          * but since they were not used when the command was originally
3135          * added, keep them optional for old user space programs to let
3136          * them continue to work with drivers that do not need the
3137          * additional information -- drivers must check!
3138          */
3139         if (info->attrs[NL80211_ATTR_SSID]) {
3140                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3141                 params.ssid_len =
3142                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3143                 if (params.ssid_len == 0 ||
3144                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3145                         return -EINVAL;
3146         }
3147
3148         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3149                 params.hidden_ssid = nla_get_u32(
3150                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3151                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3152                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3153                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3154                         return -EINVAL;
3155         }
3156
3157         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3158
3159         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3160                 params.auth_type = nla_get_u32(
3161                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3162                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3163                                              NL80211_CMD_START_AP))
3164                         return -EINVAL;
3165         } else
3166                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3167
3168         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3169                                       NL80211_MAX_NR_CIPHER_SUITES);
3170         if (err)
3171                 return err;
3172
3173         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3174                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3175                         return -EOPNOTSUPP;
3176                 params.inactivity_timeout = nla_get_u16(
3177                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3178         }
3179
3180         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3181                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3182                         return -EINVAL;
3183                 params.p2p_ctwindow =
3184                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3185                 if (params.p2p_ctwindow > 127)
3186                         return -EINVAL;
3187                 if (params.p2p_ctwindow != 0 &&
3188                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3189                         return -EINVAL;
3190         }
3191
3192         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3193                 u8 tmp;
3194
3195                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3196                         return -EINVAL;
3197                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3198                 if (tmp > 1)
3199                         return -EINVAL;
3200                 params.p2p_opp_ps = tmp;
3201                 if (params.p2p_opp_ps != 0 &&
3202                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3203                         return -EINVAL;
3204         }
3205
3206         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3207                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3208                 if (err)
3209                         return err;
3210         } else if (wdev->preset_chandef.chan) {
3211                 params.chandef = wdev->preset_chandef;
3212         } else if (!nl80211_get_ap_channel(rdev, &params))
3213                 return -EINVAL;
3214
3215         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3216                 return -EINVAL;
3217
3218         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3219         if (err < 0)
3220                 return err;
3221         if (err) {
3222                 radar_detect_width = BIT(params.chandef.width);
3223                 params.radar_required = true;
3224         }
3225
3226         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3227                                            params.chandef.chan,
3228                                            CHAN_MODE_SHARED,
3229                                            radar_detect_width);
3230         if (err)
3231                 return err;
3232
3233         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3234                 params.acl = parse_acl_data(&rdev->wiphy, info);
3235                 if (IS_ERR(params.acl))
3236                         return PTR_ERR(params.acl);
3237         }
3238
3239         err = rdev_start_ap(rdev, dev, &params);
3240         if (!err) {
3241                 wdev->preset_chandef = params.chandef;
3242                 wdev->beacon_interval = params.beacon_interval;
3243                 wdev->channel = params.chandef.chan;
3244                 wdev->ssid_len = params.ssid_len;
3245                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3246         }
3247
3248         kfree(params.acl);
3249
3250         return err;
3251 }
3252
3253 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3254 {
3255         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3256         struct net_device *dev = info->user_ptr[1];
3257         struct wireless_dev *wdev = dev->ieee80211_ptr;
3258         struct cfg80211_beacon_data params;
3259         int err;
3260
3261         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3262             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3263                 return -EOPNOTSUPP;
3264
3265         if (!rdev->ops->change_beacon)
3266                 return -EOPNOTSUPP;
3267
3268         if (!wdev->beacon_interval)
3269                 return -EINVAL;
3270
3271         err = nl80211_parse_beacon(info->attrs, &params);
3272         if (err)
3273                 return err;
3274
3275         return rdev_change_beacon(rdev, dev, &params);
3276 }
3277
3278 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3279 {
3280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3281         struct net_device *dev = info->user_ptr[1];
3282
3283         return cfg80211_stop_ap(rdev, dev);
3284 }
3285
3286 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3287         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3288         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3289         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3290         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3291         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3292         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3293 };
3294
3295 static int parse_station_flags(struct genl_info *info,
3296                                enum nl80211_iftype iftype,
3297                                struct station_parameters *params)
3298 {
3299         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3300         struct nlattr *nla;
3301         int flag;
3302
3303         /*
3304          * Try parsing the new attribute first so userspace
3305          * can specify both for older kernels.
3306          */
3307         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3308         if (nla) {
3309                 struct nl80211_sta_flag_update *sta_flags;
3310
3311                 sta_flags = nla_data(nla);
3312                 params->sta_flags_mask = sta_flags->mask;
3313                 params->sta_flags_set = sta_flags->set;
3314                 params->sta_flags_set &= params->sta_flags_mask;
3315                 if ((params->sta_flags_mask |
3316                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3317                         return -EINVAL;
3318                 return 0;
3319         }
3320
3321         /* if present, parse the old attribute */
3322
3323         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3324         if (!nla)
3325                 return 0;
3326
3327         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3328                              nla, sta_flags_policy))
3329                 return -EINVAL;
3330
3331         /*
3332          * Only allow certain flags for interface types so that
3333          * other attributes are silently ignored. Remember that
3334          * this is backward compatibility code with old userspace
3335          * and shouldn't be hit in other cases anyway.
3336          */
3337         switch (iftype) {
3338         case NL80211_IFTYPE_AP:
3339         case NL80211_IFTYPE_AP_VLAN:
3340         case NL80211_IFTYPE_P2P_GO:
3341                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3342                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3343                                          BIT(NL80211_STA_FLAG_WME) |
3344                                          BIT(NL80211_STA_FLAG_MFP);
3345                 break;
3346         case NL80211_IFTYPE_P2P_CLIENT:
3347         case NL80211_IFTYPE_STATION:
3348                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3349                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3350                 break;
3351         case NL80211_IFTYPE_MESH_POINT:
3352                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3353                                          BIT(NL80211_STA_FLAG_MFP) |
3354                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3355         default:
3356                 return -EINVAL;
3357         }
3358
3359         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3360                 if (flags[flag]) {
3361                         params->sta_flags_set |= (1<<flag);
3362
3363                         /* no longer support new API additions in old API */
3364                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3365                                 return -EINVAL;
3366                 }
3367         }
3368
3369         return 0;
3370 }
3371
3372 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3373                                  int attr)
3374 {
3375         struct nlattr *rate;
3376         u32 bitrate;
3377         u16 bitrate_compat;
3378
3379         rate = nla_nest_start(msg, attr);
3380         if (!rate)
3381                 return false;
3382
3383         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3384         bitrate = cfg80211_calculate_bitrate(info);
3385         /* report 16-bit bitrate only if we can */
3386         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3387         if (bitrate > 0 &&
3388             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3389                 return false;
3390         if (bitrate_compat > 0 &&
3391             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3392                 return false;
3393
3394         if (info->flags & RATE_INFO_FLAGS_MCS) {
3395                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3396                         return false;
3397                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3398                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3399                         return false;
3400                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3401                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3402                         return false;
3403         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3404                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3405                         return false;
3406                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3407                         return false;
3408                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3409                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3410                         return false;
3411                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3412                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3413                         return false;
3414                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3415                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3416                         return false;
3417                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3418                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3419                         return false;
3420                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3421                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3422                         return false;
3423         }
3424
3425         nla_nest_end(msg, rate);
3426         return true;
3427 }
3428
3429 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3430                                int id)
3431 {
3432         void *attr;
3433         int i = 0;
3434
3435         if (!mask)
3436                 return true;
3437
3438         attr = nla_nest_start(msg, id);
3439         if (!attr)
3440                 return false;
3441
3442         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3443                 if (!(mask & BIT(i)))
3444                         continue;
3445
3446                 if (nla_put_u8(msg, i, signal[i]))
3447                         return false;
3448         }
3449
3450         nla_nest_end(msg, attr);
3451
3452         return true;
3453 }
3454
3455 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3456                                 int flags,
3457                                 struct cfg80211_registered_device *rdev,
3458                                 struct net_device *dev,
3459                                 const u8 *mac_addr, struct station_info *sinfo)
3460 {
3461         void *hdr;
3462         struct nlattr *sinfoattr, *bss_param;
3463
3464         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3465         if (!hdr)
3466                 return -1;
3467
3468         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3469             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3470             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3471                 goto nla_put_failure;
3472
3473         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3474         if (!sinfoattr)
3475                 goto nla_put_failure;
3476         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3477             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3478                         sinfo->connected_time))
3479                 goto nla_put_failure;
3480         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3481             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3482                         sinfo->inactive_time))
3483                 goto nla_put_failure;
3484         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3485                               STATION_INFO_RX_BYTES64)) &&
3486             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3487                         (u32)sinfo->rx_bytes))
3488                 goto nla_put_failure;
3489         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3490                               STATION_INFO_TX_BYTES64)) &&
3491             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3492                         (u32)sinfo->tx_bytes))
3493                 goto nla_put_failure;
3494         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3495             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3496                         sinfo->rx_bytes))
3497                 goto nla_put_failure;
3498         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3499             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3500                         sinfo->tx_bytes))
3501                 goto nla_put_failure;
3502         if ((sinfo->filled & STATION_INFO_LLID) &&
3503             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3504                 goto nla_put_failure;
3505         if ((sinfo->filled & STATION_INFO_PLID) &&
3506             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3507                 goto nla_put_failure;
3508         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3509             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3510                        sinfo->plink_state))
3511                 goto nla_put_failure;
3512         switch (rdev->wiphy.signal_type) {
3513         case CFG80211_SIGNAL_TYPE_MBM:
3514                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3515                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3516                                sinfo->signal))
3517                         goto nla_put_failure;
3518                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3519                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3520                                sinfo->signal_avg))
3521                         goto nla_put_failure;
3522                 break;
3523         default:
3524                 break;
3525         }
3526         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL) {
3527                 if (!nl80211_put_signal(msg, sinfo->chains,
3528                                         sinfo->chain_signal,
3529                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3530                         goto nla_put_failure;
3531         }
3532         if (sinfo->filled & STATION_INFO_CHAIN_SIGNAL_AVG) {
3533                 if (!nl80211_put_signal(msg, sinfo->chains,
3534                                         sinfo->chain_signal_avg,
3535                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3536                         goto nla_put_failure;
3537         }
3538         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3539                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3540                                           NL80211_STA_INFO_TX_BITRATE))
3541                         goto nla_put_failure;
3542         }
3543         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3544                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3545                                           NL80211_STA_INFO_RX_BITRATE))
3546                         goto nla_put_failure;
3547         }
3548         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3549             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3550                         sinfo->rx_packets))
3551                 goto nla_put_failure;
3552         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3553             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3554                         sinfo->tx_packets))
3555                 goto nla_put_failure;
3556         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3557             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3558                         sinfo->tx_retries))
3559                 goto nla_put_failure;
3560         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3561             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3562                         sinfo->tx_failed))
3563                 goto nla_put_failure;
3564         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3565             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3566                         sinfo->beacon_loss_count))
3567                 goto nla_put_failure;
3568         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3569             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3570                         sinfo->local_pm))
3571                 goto nla_put_failure;
3572         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3573             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3574                         sinfo->peer_pm))
3575                 goto nla_put_failure;
3576         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3577             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3578                         sinfo->nonpeer_pm))
3579                 goto nla_put_failure;
3580         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3581                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3582                 if (!bss_param)
3583                         goto nla_put_failure;
3584
3585                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3586                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3587                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3588                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3589                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3590                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3591                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3592                                sinfo->bss_param.dtim_period) ||
3593                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3594                                 sinfo->bss_param.beacon_interval))
3595                         goto nla_put_failure;
3596
3597                 nla_nest_end(msg, bss_param);
3598         }
3599         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3600             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3601                     sizeof(struct nl80211_sta_flag_update),
3602                     &sinfo->sta_flags))
3603                 goto nla_put_failure;
3604         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3605                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3606                             sinfo->t_offset))
3607                 goto nla_put_failure;
3608         nla_nest_end(msg, sinfoattr);
3609
3610         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3611             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3612                     sinfo->assoc_req_ies))
3613                 goto nla_put_failure;
3614
3615         return genlmsg_end(msg, hdr);
3616
3617  nla_put_failure:
3618         genlmsg_cancel(msg, hdr);
3619         return -EMSGSIZE;
3620 }
3621
3622 static int nl80211_dump_station(struct sk_buff *skb,
3623                                 struct netlink_callback *cb)
3624 {
3625         struct station_info sinfo;
3626         struct cfg80211_registered_device *dev;
3627         struct wireless_dev *wdev;
3628         u8 mac_addr[ETH_ALEN];
3629         int sta_idx = cb->args[2];
3630         int err;
3631
3632         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
3633         if (err)
3634                 return err;
3635
3636         if (!wdev->netdev) {
3637                 err = -EINVAL;
3638                 goto out_err;
3639         }
3640
3641         if (!dev->ops->dump_station) {
3642                 err = -EOPNOTSUPP;
3643                 goto out_err;
3644         }
3645
3646         while (1) {
3647                 memset(&sinfo, 0, sizeof(sinfo));
3648                 err = rdev_dump_station(dev, wdev->netdev, sta_idx,
3649                                         mac_addr, &sinfo);
3650                 if (err == -ENOENT)
3651                         break;
3652                 if (err)
3653                         goto out_err;
3654
3655                 if (nl80211_send_station(skb,
3656                                 NETLINK_CB(cb->skb).portid,
3657                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3658                                 dev, wdev->netdev, mac_addr,
3659                                 &sinfo) < 0)
3660                         goto out;
3661
3662                 sta_idx++;
3663         }
3664
3665
3666  out:
3667         cb->args[2] = sta_idx;
3668         err = skb->len;
3669  out_err:
3670         nl80211_finish_wdev_dump(dev);
3671
3672         return err;
3673 }
3674
3675 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3676 {
3677         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3678         struct net_device *dev = info->user_ptr[1];
3679         struct station_info sinfo;
3680         struct sk_buff *msg;
3681         u8 *mac_addr = NULL;
3682         int err;
3683
3684         memset(&sinfo, 0, sizeof(sinfo));
3685
3686         if (!info->attrs[NL80211_ATTR_MAC])
3687                 return -EINVAL;
3688
3689         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3690
3691         if (!rdev->ops->get_station)
3692                 return -EOPNOTSUPP;
3693
3694         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3695         if (err)
3696                 return err;
3697
3698         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3699         if (!msg)
3700                 return -ENOMEM;
3701
3702         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3703                                  rdev, dev, mac_addr, &sinfo) < 0) {
3704                 nlmsg_free(msg);
3705                 return -ENOBUFS;
3706         }
3707
3708         return genlmsg_reply(msg, info);
3709 }
3710
3711 int cfg80211_check_station_change(struct wiphy *wiphy,
3712                                   struct station_parameters *params,
3713                                   enum cfg80211_station_type statype)
3714 {
3715         if (params->listen_interval != -1)
3716                 return -EINVAL;
3717         if (params->aid)
3718                 return -EINVAL;
3719
3720         /* When you run into this, adjust the code below for the new flag */
3721         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3722
3723         switch (statype) {
3724         case CFG80211_STA_MESH_PEER_KERNEL:
3725         case CFG80211_STA_MESH_PEER_USER:
3726                 /*
3727                  * No ignoring the TDLS flag here -- the userspace mesh
3728                  * code doesn't have the bug of including TDLS in the
3729                  * mask everywhere.
3730                  */
3731                 if (params->sta_flags_mask &
3732                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3733                                   BIT(NL80211_STA_FLAG_MFP) |
3734                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3735                         return -EINVAL;
3736                 break;
3737         case CFG80211_STA_TDLS_PEER_SETUP:
3738         case CFG80211_STA_TDLS_PEER_ACTIVE:
3739                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3740                         return -EINVAL;
3741                 /* ignore since it can't change */
3742                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3743                 break;
3744         default:
3745                 /* disallow mesh-specific things */
3746                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3747                         return -EINVAL;
3748                 if (params->local_pm)
3749                         return -EINVAL;
3750                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3751                         return -EINVAL;
3752         }
3753
3754         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3755             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3756                 /* TDLS can't be set, ... */
3757                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3758                         return -EINVAL;
3759                 /*
3760                  * ... but don't bother the driver with it. This works around
3761                  * a hostapd/wpa_supplicant issue -- it always includes the
3762                  * TLDS_PEER flag in the mask even for AP mode.
3763                  */
3764                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3765         }
3766
3767         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3768                 /* reject other things that can't change */
3769                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3770                         return -EINVAL;
3771                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3772                         return -EINVAL;
3773                 if (params->supported_rates)
3774                         return -EINVAL;
3775                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3776                         return -EINVAL;
3777         }
3778
3779         if (statype != CFG80211_STA_AP_CLIENT) {
3780                 if (params->vlan)
3781                         return -EINVAL;
3782         }
3783
3784         switch (statype) {
3785         case CFG80211_STA_AP_MLME_CLIENT:
3786                 /* Use this only for authorizing/unauthorizing a station */
3787                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3788                         return -EOPNOTSUPP;
3789                 break;
3790         case CFG80211_STA_AP_CLIENT:
3791                 /* accept only the listed bits */
3792                 if (params->sta_flags_mask &
3793                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3794                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3795                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3796                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3797                                   BIT(NL80211_STA_FLAG_WME) |
3798                                   BIT(NL80211_STA_FLAG_MFP)))
3799                         return -EINVAL;
3800
3801                 /* but authenticated/associated only if driver handles it */
3802                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3803                     params->sta_flags_mask &
3804                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3805                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3806                         return -EINVAL;
3807                 break;
3808         case CFG80211_STA_IBSS:
3809         case CFG80211_STA_AP_STA:
3810                 /* reject any changes other than AUTHORIZED */
3811                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3812                         return -EINVAL;
3813                 break;
3814         case CFG80211_STA_TDLS_PEER_SETUP:
3815                 /* reject any changes other than AUTHORIZED or WME */
3816                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3817                                                BIT(NL80211_STA_FLAG_WME)))
3818                         return -EINVAL;
3819                 /* force (at least) rates when authorizing */
3820                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3821                     !params->supported_rates)
3822                         return -EINVAL;
3823                 break;
3824         case CFG80211_STA_TDLS_PEER_ACTIVE:
3825                 /* reject any changes */
3826                 return -EINVAL;
3827         case CFG80211_STA_MESH_PEER_KERNEL:
3828                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3829                         return -EINVAL;
3830                 break;
3831         case CFG80211_STA_MESH_PEER_USER:
3832                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3833                         return -EINVAL;
3834                 break;
3835         }
3836
3837         return 0;
3838 }
3839 EXPORT_SYMBOL(cfg80211_check_station_change);
3840
3841 /*
3842  * Get vlan interface making sure it is running and on the right wiphy.
3843  */
3844 static struct net_device *get_vlan(struct genl_info *info,
3845                                    struct cfg80211_registered_device *rdev)
3846 {
3847         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3848         struct net_device *v;
3849         int ret;
3850
3851         if (!vlanattr)
3852                 return NULL;
3853
3854         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3855         if (!v)
3856                 return ERR_PTR(-ENODEV);
3857
3858         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3859                 ret = -EINVAL;
3860                 goto error;
3861         }
3862
3863         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3864             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3865             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3866                 ret = -EINVAL;
3867                 goto error;
3868         }
3869
3870         if (!netif_running(v)) {
3871                 ret = -ENETDOWN;
3872                 goto error;
3873         }
3874
3875         return v;
3876  error:
3877         dev_put(v);
3878         return ERR_PTR(ret);
3879 }
3880
3881 static struct nla_policy
3882 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3883         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3884         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3885 };
3886
3887 static int nl80211_parse_sta_wme(struct genl_info *info,
3888                                  struct station_parameters *params)
3889 {
3890         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3891         struct nlattr *nla;
3892         int err;
3893
3894         /* parse WME attributes if present */
3895         if (!info->attrs[NL80211_ATTR_STA_WME])
3896                 return 0;
3897
3898         nla = info->attrs[NL80211_ATTR_STA_WME];
3899         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3900                                nl80211_sta_wme_policy);
3901         if (err)
3902                 return err;
3903
3904         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3905                 params->uapsd_queues = nla_get_u8(
3906                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3907         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3908                 return -EINVAL;
3909
3910         if (tb[NL80211_STA_WME_MAX_SP])
3911                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3912
3913         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3914                 return -EINVAL;
3915
3916         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3917
3918         return 0;
3919 }
3920
3921 static int nl80211_parse_sta_channel_info(struct genl_info *info,
3922                                       struct station_parameters *params)
3923 {
3924         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
3925                 params->supported_channels =
3926                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3927                 params->supported_channels_len =
3928                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
3929                 /*
3930                  * Need to include at least one (first channel, number of
3931                  * channels) tuple for each subband, and must have proper
3932                  * tuples for the rest of the data as well.
3933                  */
3934                 if (params->supported_channels_len < 2)
3935                         return -EINVAL;
3936                 if (params->supported_channels_len % 2)
3937                         return -EINVAL;
3938         }
3939
3940         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
3941                 params->supported_oper_classes =
3942                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3943                 params->supported_oper_classes_len =
3944                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
3945                 /*
3946                  * The value of the Length field of the Supported Operating
3947                  * Classes element is between 2 and 253.
3948                  */
3949                 if (params->supported_oper_classes_len < 2 ||
3950                     params->supported_oper_classes_len > 253)
3951                         return -EINVAL;
3952         }
3953         return 0;
3954 }
3955
3956 static int nl80211_set_station_tdls(struct genl_info *info,
3957                                     struct station_parameters *params)
3958 {
3959         int err;
3960         /* Dummy STA entry gets updated once the peer capabilities are known */
3961         if (info->attrs[NL80211_ATTR_PEER_AID])
3962                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
3963         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3964                 params->ht_capa =
3965                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3966         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3967                 params->vht_capa =
3968                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3969
3970         err = nl80211_parse_sta_channel_info(info, params);
3971         if (err)
3972                 return err;
3973
3974         return nl80211_parse_sta_wme(info, params);
3975 }
3976
3977 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3978 {
3979         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3980         struct net_device *dev = info->user_ptr[1];
3981         struct station_parameters params;
3982         u8 *mac_addr;
3983         int err;
3984
3985         memset(&params, 0, sizeof(params));
3986
3987         params.listen_interval = -1;
3988
3989         if (!rdev->ops->change_station)
3990                 return -EOPNOTSUPP;
3991
3992         if (info->attrs[NL80211_ATTR_STA_AID])
3993                 return -EINVAL;
3994
3995         if (!info->attrs[NL80211_ATTR_MAC])
3996                 return -EINVAL;
3997
3998         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3999
4000         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4001                 params.supported_rates =
4002                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4003                 params.supported_rates_len =
4004                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4005         }
4006
4007         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4008                 params.capability =
4009                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4010                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4011         }
4012
4013         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4014                 params.ext_capab =
4015                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4016                 params.ext_capab_len =
4017                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4018         }
4019
4020         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4021                 return -EINVAL;
4022
4023         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4024                 return -EINVAL;
4025
4026         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4027                 params.plink_action =
4028                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4029                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4030                         return -EINVAL;
4031         }
4032
4033         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4034                 params.plink_state =
4035                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4036                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4037                         return -EINVAL;
4038                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4039         }
4040
4041         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4042                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4043                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4044
4045                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4046                     pm > NL80211_MESH_POWER_MAX)
4047                         return -EINVAL;
4048
4049                 params.local_pm = pm;
4050         }
4051
4052         /* Include parameters for TDLS peer (will check later) */
4053         err = nl80211_set_station_tdls(info, &params);
4054         if (err)
4055                 return err;
4056
4057         params.vlan = get_vlan(info, rdev);
4058         if (IS_ERR(params.vlan))
4059                 return PTR_ERR(params.vlan);
4060
4061         switch (dev->ieee80211_ptr->iftype) {
4062         case NL80211_IFTYPE_AP:
4063         case NL80211_IFTYPE_AP_VLAN:
4064         case NL80211_IFTYPE_P2P_GO:
4065         case NL80211_IFTYPE_P2P_CLIENT:
4066         case NL80211_IFTYPE_STATION:
4067         case NL80211_IFTYPE_ADHOC:
4068         case NL80211_IFTYPE_MESH_POINT:
4069                 break;
4070         default:
4071                 err = -EOPNOTSUPP;
4072                 goto out_put_vlan;
4073         }
4074
4075         /* driver will call cfg80211_check_station_change() */
4076         err = rdev_change_station(rdev, dev, mac_addr, &params);
4077
4078  out_put_vlan:
4079         if (params.vlan)
4080                 dev_put(params.vlan);
4081
4082         return err;
4083 }
4084
4085 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4086 {
4087         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4088         int err;
4089         struct net_device *dev = info->user_ptr[1];
4090         struct station_parameters params;
4091         u8 *mac_addr = NULL;
4092
4093         memset(&params, 0, sizeof(params));
4094
4095         if (!rdev->ops->add_station)
4096                 return -EOPNOTSUPP;
4097
4098         if (!info->attrs[NL80211_ATTR_MAC])
4099                 return -EINVAL;
4100
4101         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4102                 return -EINVAL;
4103
4104         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4105                 return -EINVAL;
4106
4107         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4108             !info->attrs[NL80211_ATTR_PEER_AID])
4109                 return -EINVAL;
4110
4111         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4112         params.supported_rates =
4113                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4114         params.supported_rates_len =
4115                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4116         params.listen_interval =
4117                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4118
4119         if (info->attrs[NL80211_ATTR_PEER_AID])
4120                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4121         else
4122                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4123         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4124                 return -EINVAL;
4125
4126         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4127                 params.capability =
4128                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4129                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4130         }
4131
4132         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4133                 params.ext_capab =
4134                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4135                 params.ext_capab_len =
4136                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4137         }
4138
4139         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4140                 params.ht_capa =
4141                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4142
4143         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4144                 params.vht_capa =
4145                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4146
4147         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4148                 params.plink_action =
4149                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4150                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4151                         return -EINVAL;
4152         }
4153
4154         err = nl80211_parse_sta_channel_info(info, &params);
4155         if (err)
4156                 return err;
4157
4158         err = nl80211_parse_sta_wme(info, &params);
4159         if (err)
4160                 return err;
4161
4162         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4163                 return -EINVAL;
4164
4165         /* When you run into this, adjust the code below for the new flag */
4166         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4167
4168         switch (dev->ieee80211_ptr->iftype) {
4169         case NL80211_IFTYPE_AP:
4170         case NL80211_IFTYPE_AP_VLAN:
4171         case NL80211_IFTYPE_P2P_GO:
4172                 /* ignore WME attributes if iface/sta is not capable */
4173                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4174                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4175                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4176
4177                 /* TDLS peers cannot be added */
4178                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4179                     info->attrs[NL80211_ATTR_PEER_AID])
4180                         return -EINVAL;
4181                 /* but don't bother the driver with it */
4182                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4183
4184                 /* allow authenticated/associated only if driver handles it */
4185                 if (!(rdev->wiphy.features &
4186                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4187                     params.sta_flags_mask &
4188                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4189                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4190                         return -EINVAL;
4191
4192                 /* must be last in here for error handling */
4193                 params.vlan = get_vlan(info, rdev);
4194                 if (IS_ERR(params.vlan))
4195                         return PTR_ERR(params.vlan);
4196                 break;
4197         case NL80211_IFTYPE_MESH_POINT:
4198                 /* ignore uAPSD data */
4199                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4200
4201                 /* associated is disallowed */
4202                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4203                         return -EINVAL;
4204                 /* TDLS peers cannot be added */
4205                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4206                     info->attrs[NL80211_ATTR_PEER_AID])
4207                         return -EINVAL;
4208                 break;
4209         case NL80211_IFTYPE_STATION:
4210         case NL80211_IFTYPE_P2P_CLIENT:
4211                 /* ignore uAPSD data */
4212                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4213
4214                 /* these are disallowed */
4215                 if (params.sta_flags_mask &
4216                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4217                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4218                         return -EINVAL;
4219                 /* Only TDLS peers can be added */
4220                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4221                         return -EINVAL;
4222                 /* Can only add if TDLS ... */
4223                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4224                         return -EOPNOTSUPP;
4225                 /* ... with external setup is supported */
4226                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4227                         return -EOPNOTSUPP;
4228                 /*
4229                  * Older wpa_supplicant versions always mark the TDLS peer
4230                  * as authorized, but it shouldn't yet be.
4231                  */
4232                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4233                 break;
4234         default:
4235                 return -EOPNOTSUPP;
4236         }
4237
4238         /* be aware of params.vlan when changing code here */
4239
4240         err = rdev_add_station(rdev, dev, mac_addr, &params);
4241
4242         if (params.vlan)
4243                 dev_put(params.vlan);
4244         return err;
4245 }
4246
4247 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4248 {
4249         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4250         struct net_device *dev = info->user_ptr[1];
4251         u8 *mac_addr = NULL;
4252
4253         if (info->attrs[NL80211_ATTR_MAC])
4254                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4255
4256         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4257             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4258             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4259             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4260                 return -EINVAL;
4261
4262         if (!rdev->ops->del_station)
4263                 return -EOPNOTSUPP;
4264
4265         return rdev_del_station(rdev, dev, mac_addr);
4266 }
4267
4268 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4269                                 int flags, struct net_device *dev,
4270                                 u8 *dst, u8 *next_hop,
4271                                 struct mpath_info *pinfo)
4272 {
4273         void *hdr;
4274         struct nlattr *pinfoattr;
4275
4276         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4277         if (!hdr)
4278                 return -1;
4279
4280         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4281             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4282             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4283             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4284                 goto nla_put_failure;
4285
4286         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4287         if (!pinfoattr)
4288                 goto nla_put_failure;
4289         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4290             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4291                         pinfo->frame_qlen))
4292                 goto nla_put_failure;
4293         if (((pinfo->filled & MPATH_INFO_SN) &&
4294              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4295             ((pinfo->filled & MPATH_INFO_METRIC) &&
4296              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4297                          pinfo->metric)) ||
4298             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4299              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4300                          pinfo->exptime)) ||
4301             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4302              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4303                         pinfo->flags)) ||
4304             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4305              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4306                          pinfo->discovery_timeout)) ||
4307             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4308              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4309                         pinfo->discovery_retries)))
4310                 goto nla_put_failure;
4311
4312         nla_nest_end(msg, pinfoattr);
4313
4314         return genlmsg_end(msg, hdr);
4315
4316  nla_put_failure:
4317         genlmsg_cancel(msg, hdr);
4318         return -EMSGSIZE;
4319 }
4320
4321 static int nl80211_dump_mpath(struct sk_buff *skb,
4322                               struct netlink_callback *cb)
4323 {
4324         struct mpath_info pinfo;
4325         struct cfg80211_registered_device *dev;
4326         struct wireless_dev *wdev;
4327         u8 dst[ETH_ALEN];
4328         u8 next_hop[ETH_ALEN];
4329         int path_idx = cb->args[2];
4330         int err;
4331
4332         err = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
4333         if (err)
4334                 return err;
4335
4336         if (!dev->ops->dump_mpath) {
4337                 err = -EOPNOTSUPP;
4338                 goto out_err;
4339         }
4340
4341         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4342                 err = -EOPNOTSUPP;
4343                 goto out_err;
4344         }
4345
4346         while (1) {
4347                 err = rdev_dump_mpath(dev, wdev->netdev, path_idx, dst,
4348                                       next_hop, &pinfo);
4349                 if (err == -ENOENT)
4350                         break;
4351                 if (err)
4352                         goto out_err;
4353
4354                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4355                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4356                                        wdev->netdev, dst, next_hop,
4357                                        &pinfo) < 0)
4358                         goto out;
4359
4360                 path_idx++;
4361         }
4362
4363
4364  out:
4365         cb->args[2] = path_idx;
4366         err = skb->len;
4367  out_err:
4368         nl80211_finish_wdev_dump(dev);
4369         return err;
4370 }
4371
4372 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4373 {
4374         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4375         int err;
4376         struct net_device *dev = info->user_ptr[1];
4377         struct mpath_info pinfo;
4378         struct sk_buff *msg;
4379         u8 *dst = NULL;
4380         u8 next_hop[ETH_ALEN];
4381
4382         memset(&pinfo, 0, sizeof(pinfo));
4383
4384         if (!info->attrs[NL80211_ATTR_MAC])
4385                 return -EINVAL;
4386
4387         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4388
4389         if (!rdev->ops->get_mpath)
4390                 return -EOPNOTSUPP;
4391
4392         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4393                 return -EOPNOTSUPP;
4394
4395         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4396         if (err)
4397                 return err;
4398
4399         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4400         if (!msg)
4401                 return -ENOMEM;
4402
4403         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4404                                  dev, dst, next_hop, &pinfo) < 0) {
4405                 nlmsg_free(msg);
4406                 return -ENOBUFS;
4407         }
4408
4409         return genlmsg_reply(msg, info);
4410 }
4411
4412 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4413 {
4414         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4415         struct net_device *dev = info->user_ptr[1];
4416         u8 *dst = NULL;
4417         u8 *next_hop = NULL;
4418
4419         if (!info->attrs[NL80211_ATTR_MAC])
4420                 return -EINVAL;
4421
4422         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4423                 return -EINVAL;
4424
4425         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4426         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4427
4428         if (!rdev->ops->change_mpath)
4429                 return -EOPNOTSUPP;
4430
4431         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4432                 return -EOPNOTSUPP;
4433
4434         return rdev_change_mpath(rdev, dev, dst, next_hop);
4435 }
4436
4437 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4438 {
4439         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4440         struct net_device *dev = info->user_ptr[1];
4441         u8 *dst = NULL;
4442         u8 *next_hop = NULL;
4443
4444         if (!info->attrs[NL80211_ATTR_MAC])
4445                 return -EINVAL;
4446
4447         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4448                 return -EINVAL;
4449
4450         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4451         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4452
4453         if (!rdev->ops->add_mpath)
4454                 return -EOPNOTSUPP;
4455
4456         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4457                 return -EOPNOTSUPP;
4458
4459         return rdev_add_mpath(rdev, dev, dst, next_hop);
4460 }
4461
4462 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4463 {
4464         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4465         struct net_device *dev = info->user_ptr[1];
4466         u8 *dst = NULL;
4467
4468         if (info->attrs[NL80211_ATTR_MAC])
4469                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4470
4471         if (!rdev->ops->del_mpath)
4472                 return -EOPNOTSUPP;
4473
4474         return rdev_del_mpath(rdev, dev, dst);
4475 }
4476
4477 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4478 {
4479         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4480         struct net_device *dev = info->user_ptr[1];
4481         struct bss_parameters params;
4482
4483         memset(&params, 0, sizeof(params));
4484         /* default to not changing parameters */
4485         params.use_cts_prot = -1;
4486         params.use_short_preamble = -1;
4487         params.use_short_slot_time = -1;
4488         params.ap_isolate = -1;
4489         params.ht_opmode = -1;
4490         params.p2p_ctwindow = -1;
4491         params.p2p_opp_ps = -1;
4492
4493         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4494                 params.use_cts_prot =
4495                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4496         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4497                 params.use_short_preamble =
4498                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4499         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4500                 params.use_short_slot_time =
4501                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4502         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4503                 params.basic_rates =
4504                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4505                 params.basic_rates_len =
4506                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4507         }
4508         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4509                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4510         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4511                 params.ht_opmode =
4512                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4513
4514         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4515                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4516                         return -EINVAL;
4517                 params.p2p_ctwindow =
4518                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4519                 if (params.p2p_ctwindow < 0)
4520                         return -EINVAL;
4521                 if (params.p2p_ctwindow != 0 &&
4522                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4523                         return -EINVAL;
4524         }
4525
4526         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4527                 u8 tmp;
4528
4529                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4530                         return -EINVAL;
4531                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4532                 if (tmp > 1)
4533                         return -EINVAL;
4534                 params.p2p_opp_ps = tmp;
4535                 if (params.p2p_opp_ps &&
4536                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4537                         return -EINVAL;
4538         }
4539
4540         if (!rdev->ops->change_bss)
4541                 return -EOPNOTSUPP;
4542
4543         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4544             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4545                 return -EOPNOTSUPP;
4546
4547         return rdev_change_bss(rdev, dev, &params);
4548 }
4549
4550 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4551         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4552         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4553         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4554         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4555         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4556         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4557 };
4558
4559 static int parse_reg_rule(struct nlattr *tb[],
4560         struct ieee80211_reg_rule *reg_rule)
4561 {
4562         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4563         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4564
4565         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4566                 return -EINVAL;
4567         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4568                 return -EINVAL;
4569         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4570                 return -EINVAL;
4571         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4572                 return -EINVAL;
4573         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4574                 return -EINVAL;
4575
4576         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4577
4578         freq_range->start_freq_khz =
4579                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4580         freq_range->end_freq_khz =
4581                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4582         freq_range->max_bandwidth_khz =
4583                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4584
4585         power_rule->max_eirp =
4586                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4587
4588         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4589                 power_rule->max_antenna_gain =
4590                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4591
4592         return 0;
4593 }
4594
4595 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4596 {
4597         int r;
4598         char *data = NULL;
4599         enum nl80211_user_reg_hint_type user_reg_hint_type;
4600
4601         /*
4602          * You should only get this when cfg80211 hasn't yet initialized
4603          * completely when built-in to the kernel right between the time
4604          * window between nl80211_init() and regulatory_init(), if that is
4605          * even possible.
4606          */
4607         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4608                 return -EINPROGRESS;
4609
4610         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4611                 return -EINVAL;
4612
4613         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4614
4615         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4616                 user_reg_hint_type =
4617                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4618         else
4619                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4620
4621         switch (user_reg_hint_type) {
4622         case NL80211_USER_REG_HINT_USER:
4623         case NL80211_USER_REG_HINT_CELL_BASE:
4624                 break;
4625         default:
4626                 return -EINVAL;
4627         }
4628
4629         r = regulatory_hint_user(data, user_reg_hint_type);
4630
4631         return r;
4632 }
4633
4634 static int nl80211_get_mesh_config(struct sk_buff *skb,
4635                                    struct genl_info *info)
4636 {
4637         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4638         struct net_device *dev = info->user_ptr[1];
4639         struct wireless_dev *wdev = dev->ieee80211_ptr;
4640         struct mesh_config cur_params;
4641         int err = 0;
4642         void *hdr;
4643         struct nlattr *pinfoattr;
4644         struct sk_buff *msg;
4645
4646         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4647                 return -EOPNOTSUPP;
4648
4649         if (!rdev->ops->get_mesh_config)
4650                 return -EOPNOTSUPP;
4651
4652         wdev_lock(wdev);
4653         /* If not connected, get default parameters */
4654         if (!wdev->mesh_id_len)
4655                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4656         else
4657                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4658         wdev_unlock(wdev);
4659
4660         if (err)
4661                 return err;
4662
4663         /* Draw up a netlink message to send back */
4664         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4665         if (!msg)
4666                 return -ENOMEM;
4667         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4668                              NL80211_CMD_GET_MESH_CONFIG);
4669         if (!hdr)
4670                 goto out;
4671         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4672         if (!pinfoattr)
4673                 goto nla_put_failure;
4674         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4675             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4676                         cur_params.dot11MeshRetryTimeout) ||
4677             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4678                         cur_params.dot11MeshConfirmTimeout) ||
4679             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4680                         cur_params.dot11MeshHoldingTimeout) ||
4681             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4682                         cur_params.dot11MeshMaxPeerLinks) ||
4683             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4684                        cur_params.dot11MeshMaxRetries) ||
4685             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4686                        cur_params.dot11MeshTTL) ||
4687             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4688                        cur_params.element_ttl) ||
4689             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4690                        cur_params.auto_open_plinks) ||
4691             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4692                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4693             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4694                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4695             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4696                         cur_params.path_refresh_time) ||
4697             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4698                         cur_params.min_discovery_timeout) ||
4699             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4700                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4701             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4702                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4703             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4704                         cur_params.dot11MeshHWMPperrMinInterval) ||
4705             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4706                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4707             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4708                        cur_params.dot11MeshHWMPRootMode) ||
4709             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4710                         cur_params.dot11MeshHWMPRannInterval) ||
4711             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4712                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4713             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4714                        cur_params.dot11MeshForwarding) ||
4715             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4716                         cur_params.rssi_threshold) ||
4717             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4718                         cur_params.ht_opmode) ||
4719             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4720                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4721             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4722                         cur_params.dot11MeshHWMProotInterval) ||
4723             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4724                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4725             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4726                         cur_params.power_mode) ||
4727             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4728                         cur_params.dot11MeshAwakeWindowDuration) ||
4729             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
4730                         cur_params.plink_timeout))
4731                 goto nla_put_failure;
4732         nla_nest_end(msg, pinfoattr);
4733         genlmsg_end(msg, hdr);
4734         return genlmsg_reply(msg, info);
4735
4736  nla_put_failure:
4737         genlmsg_cancel(msg, hdr);
4738  out:
4739         nlmsg_free(msg);
4740         return -ENOBUFS;
4741 }
4742
4743 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4744         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4745         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4746         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4747         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4748         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4749         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4750         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4751         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4752         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4753         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4754         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4755         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4756         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4757         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4758         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4759         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4760         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4761         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4762         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4763         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4764         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4765         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4766         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4767         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4768         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4769         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4770         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4771         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
4772 };
4773
4774 static const struct nla_policy
4775         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4776         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4777         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4778         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4779         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4780         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
4781         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
4782         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4783                                     .len = IEEE80211_MAX_DATA_LEN },
4784         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4785 };
4786
4787 static int nl80211_parse_mesh_config(struct genl_info *info,
4788                                      struct mesh_config *cfg,
4789                                      u32 *mask_out)
4790 {
4791         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4792         u32 mask = 0;
4793
4794 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4795 do {                                                                        \
4796         if (tb[attr]) {                                                     \
4797                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4798                         return -EINVAL;                                     \
4799                 cfg->param = fn(tb[attr]);                                  \
4800                 mask |= (1 << (attr - 1));                                  \
4801         }                                                                   \
4802 } while (0)
4803
4804
4805         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4806                 return -EINVAL;
4807         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4808                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4809                              nl80211_meshconf_params_policy))
4810                 return -EINVAL;
4811
4812         /* This makes sure that there aren't more than 32 mesh config
4813          * parameters (otherwise our bitfield scheme would not work.) */
4814         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4815
4816         /* Fill in the params struct */
4817         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4818                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4819                                   nla_get_u16);
4820         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4821                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4822                                   nla_get_u16);
4823         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4824                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4825                                   nla_get_u16);
4826         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4827                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4828                                   nla_get_u16);
4829         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4830                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4831                                   nla_get_u8);
4832         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4833                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4834         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4835                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4836                                   nla_get_u8);
4837         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4838                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4839                                   nla_get_u8);
4840         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4841                                   1, 255, mask,
4842                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4843                                   nla_get_u32);
4844         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4845                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4846                                   nla_get_u8);
4847         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4848                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4849                                   nla_get_u32);
4850         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4851                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4852                                   nla_get_u16);
4853         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4854                                   1, 65535, mask,
4855                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4856                                   nla_get_u32);
4857         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4858                                   1, 65535, mask,
4859                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4860                                   nla_get_u16);
4861         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4862                                   1, 65535, mask,
4863                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4864                                   nla_get_u16);
4865         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4866                                   dot11MeshHWMPnetDiameterTraversalTime,
4867                                   1, 65535, mask,
4868                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4869                                   nla_get_u16);
4870         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4871                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4872                                   nla_get_u8);
4873         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4874                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4875                                   nla_get_u16);
4876         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4877                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4878                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4879                                   nla_get_u8);
4880         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4881                                   mask, NL80211_MESHCONF_FORWARDING,
4882                                   nla_get_u8);
4883         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
4884                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4885                                   nla_get_s32);
4886         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4887                                   mask, NL80211_MESHCONF_HT_OPMODE,
4888                                   nla_get_u16);
4889         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4890                                   1, 65535, mask,
4891                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4892                                   nla_get_u32);
4893         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4894                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4895                                   nla_get_u16);
4896         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4897                                   dot11MeshHWMPconfirmationInterval,
4898                                   1, 65535, mask,
4899                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4900                                   nla_get_u16);
4901         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4902                                   NL80211_MESH_POWER_ACTIVE,
4903                                   NL80211_MESH_POWER_MAX,
4904                                   mask, NL80211_MESHCONF_POWER_MODE,
4905                                   nla_get_u32);
4906         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4907                                   0, 65535, mask,
4908                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4909         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 1, 0xffffffff,
4910                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
4911                                   nla_get_u32);
4912         if (mask_out)
4913                 *mask_out = mask;
4914
4915         return 0;
4916
4917 #undef FILL_IN_MESH_PARAM_IF_SET
4918 }
4919
4920 static int nl80211_parse_mesh_setup(struct genl_info *info,
4921                                      struct mesh_setup *setup)
4922 {
4923         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4924         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4925
4926         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4927                 return -EINVAL;
4928         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4929                              info->attrs[NL80211_ATTR_MESH_SETUP],
4930                              nl80211_mesh_setup_params_policy))
4931                 return -EINVAL;
4932
4933         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4934                 setup->sync_method =
4935                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4936                  IEEE80211_SYNC_METHOD_VENDOR :
4937                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4938
4939         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4940                 setup->path_sel_proto =
4941                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4942                  IEEE80211_PATH_PROTOCOL_VENDOR :
4943                  IEEE80211_PATH_PROTOCOL_HWMP;
4944
4945         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4946                 setup->path_metric =
4947                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4948                  IEEE80211_PATH_METRIC_VENDOR :
4949                  IEEE80211_PATH_METRIC_AIRTIME;
4950
4951
4952         if (tb[NL80211_MESH_SETUP_IE]) {
4953                 struct nlattr *ieattr =
4954                         tb[NL80211_MESH_SETUP_IE];
4955                 if (!is_valid_ie_attr(ieattr))
4956                         return -EINVAL;
4957                 setup->ie = nla_data(ieattr);
4958                 setup->ie_len = nla_len(ieattr);
4959         }
4960         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
4961             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
4962                 return -EINVAL;
4963         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
4964         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4965         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4966         if (setup->is_secure)
4967                 setup->user_mpm = true;
4968
4969         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
4970                 if (!setup->user_mpm)
4971                         return -EINVAL;
4972                 setup->auth_id =
4973                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
4974         }
4975
4976         return 0;
4977 }
4978
4979 static int nl80211_update_mesh_config(struct sk_buff *skb,
4980                                       struct genl_info *info)
4981 {
4982         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4983         struct net_device *dev = info->user_ptr[1];
4984         struct wireless_dev *wdev = dev->ieee80211_ptr;
4985         struct mesh_config cfg;
4986         u32 mask;
4987         int err;
4988
4989         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4990                 return -EOPNOTSUPP;
4991
4992         if (!rdev->ops->update_mesh_config)
4993                 return -EOPNOTSUPP;
4994
4995         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4996         if (err)
4997                 return err;
4998
4999         wdev_lock(wdev);
5000         if (!wdev->mesh_id_len)
5001                 err = -ENOLINK;
5002
5003         if (!err)
5004                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5005
5006         wdev_unlock(wdev);
5007
5008         return err;
5009 }
5010
5011 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
5012 {
5013         const struct ieee80211_regdomain *regdom;
5014         struct sk_buff *msg;
5015         void *hdr = NULL;
5016         struct nlattr *nl_reg_rules;
5017         unsigned int i;
5018
5019         if (!cfg80211_regdomain)
5020                 return -EINVAL;
5021
5022         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5023         if (!msg)
5024                 return -ENOBUFS;
5025
5026         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5027                              NL80211_CMD_GET_REG);
5028         if (!hdr)
5029                 goto put_failure;
5030
5031         if (reg_last_request_cell_base() &&
5032             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5033                         NL80211_USER_REG_HINT_CELL_BASE))
5034                 goto nla_put_failure;
5035
5036         rcu_read_lock();
5037         regdom = rcu_dereference(cfg80211_regdomain);
5038
5039         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5040             (regdom->dfs_region &&
5041              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5042                 goto nla_put_failure_rcu;
5043
5044         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5045         if (!nl_reg_rules)
5046                 goto nla_put_failure_rcu;
5047
5048         for (i = 0; i < regdom->n_reg_rules; i++) {
5049                 struct nlattr *nl_reg_rule;
5050                 const struct ieee80211_reg_rule *reg_rule;
5051                 const struct ieee80211_freq_range *freq_range;
5052                 const struct ieee80211_power_rule *power_rule;
5053
5054                 reg_rule = &regdom->reg_rules[i];
5055                 freq_range = &reg_rule->freq_range;
5056                 power_rule = &reg_rule->power_rule;
5057
5058                 nl_reg_rule = nla_nest_start(msg, i);
5059                 if (!nl_reg_rule)
5060                         goto nla_put_failure_rcu;
5061
5062                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5063                                 reg_rule->flags) ||
5064                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5065                                 freq_range->start_freq_khz) ||
5066                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5067                                 freq_range->end_freq_khz) ||
5068                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5069                                 freq_range->max_bandwidth_khz) ||
5070                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5071                                 power_rule->max_antenna_gain) ||
5072                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5073                                 power_rule->max_eirp))
5074                         goto nla_put_failure_rcu;
5075
5076                 nla_nest_end(msg, nl_reg_rule);
5077         }
5078         rcu_read_unlock();
5079
5080         nla_nest_end(msg, nl_reg_rules);
5081
5082         genlmsg_end(msg, hdr);
5083         return genlmsg_reply(msg, info);
5084
5085 nla_put_failure_rcu:
5086         rcu_read_unlock();
5087 nla_put_failure:
5088         genlmsg_cancel(msg, hdr);
5089 put_failure:
5090         nlmsg_free(msg);
5091         return -EMSGSIZE;
5092 }
5093
5094 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5095 {
5096         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5097         struct nlattr *nl_reg_rule;
5098         char *alpha2 = NULL;
5099         int rem_reg_rules = 0, r = 0;
5100         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5101         u8 dfs_region = 0;
5102         struct ieee80211_regdomain *rd = NULL;
5103
5104         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5105                 return -EINVAL;
5106
5107         if (!info->attrs[NL80211_ATTR_REG_RULES])
5108                 return -EINVAL;
5109
5110         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5111
5112         if (info->attrs[NL80211_ATTR_DFS_REGION])
5113                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5114
5115         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5116                             rem_reg_rules) {
5117                 num_rules++;
5118                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5119                         return -EINVAL;
5120         }
5121
5122         size_of_regd = sizeof(struct ieee80211_regdomain) +
5123                        num_rules * sizeof(struct ieee80211_reg_rule);
5124
5125         rd = kzalloc(size_of_regd, GFP_KERNEL);
5126         if (!rd)
5127                 return -ENOMEM;
5128
5129         rd->n_reg_rules = num_rules;
5130         rd->alpha2[0] = alpha2[0];
5131         rd->alpha2[1] = alpha2[1];
5132
5133         /*
5134          * Disable DFS master mode if the DFS region was
5135          * not supported or known on this kernel.
5136          */
5137         if (reg_supported_dfs_region(dfs_region))
5138                 rd->dfs_region = dfs_region;
5139
5140         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5141                             rem_reg_rules) {
5142                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5143                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5144                           reg_rule_policy);
5145                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5146                 if (r)
5147                         goto bad_reg;
5148
5149                 rule_idx++;
5150
5151                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5152                         r = -EINVAL;
5153                         goto bad_reg;
5154                 }
5155         }
5156
5157         r = set_regdom(rd);
5158         /* set_regdom took ownership */
5159         rd = NULL;
5160
5161  bad_reg:
5162         kfree(rd);
5163         return r;
5164 }
5165
5166 static int validate_scan_freqs(struct nlattr *freqs)
5167 {
5168         struct nlattr *attr1, *attr2;
5169         int n_channels = 0, tmp1, tmp2;
5170
5171         nla_for_each_nested(attr1, freqs, tmp1) {
5172                 n_channels++;
5173                 /*
5174                  * Some hardware has a limited channel list for
5175                  * scanning, and it is pretty much nonsensical
5176                  * to scan for a channel twice, so disallow that
5177                  * and don't require drivers to check that the
5178                  * channel list they get isn't longer than what
5179                  * they can scan, as long as they can scan all
5180                  * the channels they registered at once.
5181                  */
5182                 nla_for_each_nested(attr2, freqs, tmp2)
5183                         if (attr1 != attr2 &&
5184                             nla_get_u32(attr1) == nla_get_u32(attr2))
5185                                 return 0;
5186         }
5187
5188         return n_channels;
5189 }
5190
5191 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5192 {
5193         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5194         struct wireless_dev *wdev = info->user_ptr[1];
5195         struct cfg80211_scan_request *request;
5196         struct nlattr *attr;
5197         struct wiphy *wiphy;
5198         int err, tmp, n_ssids = 0, n_channels, i;
5199         size_t ie_len;
5200
5201         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5202                 return -EINVAL;
5203
5204         wiphy = &rdev->wiphy;
5205
5206         if (!rdev->ops->scan)
5207                 return -EOPNOTSUPP;
5208
5209         if (rdev->scan_req) {
5210                 err = -EBUSY;
5211                 goto unlock;
5212         }
5213
5214         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5215                 n_channels = validate_scan_freqs(
5216                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5217                 if (!n_channels) {
5218                         err = -EINVAL;
5219                         goto unlock;
5220                 }
5221         } else {
5222                 enum ieee80211_band band;
5223                 n_channels = 0;
5224
5225                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5226                         if (wiphy->bands[band])
5227                                 n_channels += wiphy->bands[band]->n_channels;
5228         }
5229
5230         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5231                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5232                         n_ssids++;
5233
5234         if (n_ssids > wiphy->max_scan_ssids) {
5235                 err = -EINVAL;
5236                 goto unlock;
5237         }
5238
5239         if (info->attrs[NL80211_ATTR_IE])
5240                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5241         else
5242                 ie_len = 0;
5243
5244         if (ie_len > wiphy->max_scan_ie_len) {
5245                 err = -EINVAL;
5246                 goto unlock;
5247         }
5248
5249         request = kzalloc(sizeof(*request)
5250                         + sizeof(*request->ssids) * n_ssids
5251                         + sizeof(*request->channels) * n_channels
5252                         + ie_len, GFP_KERNEL);
5253         if (!request) {
5254                 err = -ENOMEM;
5255                 goto unlock;
5256         }
5257
5258         if (n_ssids)
5259                 request->ssids = (void *)&request->channels[n_channels];
5260         request->n_ssids = n_ssids;
5261         if (ie_len) {
5262                 if (request->ssids)
5263                         request->ie = (void *)(request->ssids + n_ssids);
5264                 else
5265                         request->ie = (void *)(request->channels + n_channels);
5266         }
5267
5268         i = 0;
5269         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5270                 /* user specified, bail out if channel not found */
5271                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5272                         struct ieee80211_channel *chan;
5273
5274                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5275
5276                         if (!chan) {
5277                                 err = -EINVAL;
5278                                 goto out_free;
5279                         }
5280
5281                         /* ignore disabled channels */
5282                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5283                                 continue;
5284
5285                         request->channels[i] = chan;
5286                         i++;
5287                 }
5288         } else {
5289                 enum ieee80211_band band;
5290
5291                 /* all channels */
5292                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5293                         int j;
5294                         if (!wiphy->bands[band])
5295                                 continue;
5296                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5297                                 struct ieee80211_channel *chan;
5298
5299                                 chan = &wiphy->bands[band]->channels[j];
5300
5301                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5302                                         continue;
5303
5304                                 request->channels[i] = chan;
5305                                 i++;
5306                         }
5307                 }
5308         }
5309
5310         if (!i) {
5311                 err = -EINVAL;
5312                 goto out_free;
5313         }
5314
5315         request->n_channels = i;
5316
5317         i = 0;
5318         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5319                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5320                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5321                                 err = -EINVAL;
5322                                 goto out_free;
5323                         }
5324                         request->ssids[i].ssid_len = nla_len(attr);
5325                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5326                         i++;
5327                 }
5328         }
5329
5330         if (info->attrs[NL80211_ATTR_IE]) {
5331                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5332                 memcpy((void *)request->ie,
5333                        nla_data(info->attrs[NL80211_ATTR_IE]),
5334                        request->ie_len);
5335         }
5336
5337         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5338                 if (wiphy->bands[i])
5339                         request->rates[i] =
5340                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5341
5342         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5343                 nla_for_each_nested(attr,
5344                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5345                                     tmp) {
5346                         enum ieee80211_band band = nla_type(attr);
5347
5348                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5349                                 err = -EINVAL;
5350                                 goto out_free;
5351                         }
5352
5353                         if (!wiphy->bands[band])
5354                                 continue;
5355
5356                         err = ieee80211_get_ratemask(wiphy->bands[band],
5357                                                      nla_data(attr),
5358                                                      nla_len(attr),
5359                                                      &request->rates[band]);
5360                         if (err)
5361                                 goto out_free;
5362                 }
5363         }
5364
5365         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5366                 request->flags = nla_get_u32(
5367                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5368                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5369                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5370                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5371                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5372                         err = -EOPNOTSUPP;
5373                         goto out_free;
5374                 }
5375         }
5376
5377         request->no_cck =
5378                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5379
5380         request->wdev = wdev;
5381         request->wiphy = &rdev->wiphy;
5382         request->scan_start = jiffies;
5383
5384         rdev->scan_req = request;
5385         err = rdev_scan(rdev, request);
5386
5387         if (!err) {
5388                 nl80211_send_scan_start(rdev, wdev);
5389                 if (wdev->netdev)
5390                         dev_hold(wdev->netdev);
5391         } else {
5392  out_free:
5393                 rdev->scan_req = NULL;
5394                 kfree(request);
5395         }
5396
5397  unlock:
5398         return err;
5399 }
5400
5401 static int nl80211_start_sched_scan(struct sk_buff *skb,
5402                                     struct genl_info *info)
5403 {
5404         struct cfg80211_sched_scan_request *request;
5405         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5406         struct net_device *dev = info->user_ptr[1];
5407         struct nlattr *attr;
5408         struct wiphy *wiphy;
5409         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5410         u32 interval;
5411         enum ieee80211_band band;
5412         size_t ie_len;
5413         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5414
5415         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5416             !rdev->ops->sched_scan_start)
5417                 return -EOPNOTSUPP;
5418
5419         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5420                 return -EINVAL;
5421
5422         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5423                 return -EINVAL;
5424
5425         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5426         if (interval == 0)
5427                 return -EINVAL;
5428
5429         wiphy = &rdev->wiphy;
5430
5431         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5432                 n_channels = validate_scan_freqs(
5433                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5434                 if (!n_channels)
5435                         return -EINVAL;
5436         } else {
5437                 n_channels = 0;
5438
5439                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5440                         if (wiphy->bands[band])
5441                                 n_channels += wiphy->bands[band]->n_channels;
5442         }
5443
5444         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5445                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5446                                     tmp)
5447                         n_ssids++;
5448
5449         if (n_ssids > wiphy->max_sched_scan_ssids)
5450                 return -EINVAL;
5451
5452         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5453                 nla_for_each_nested(attr,
5454                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5455                                     tmp)
5456                         n_match_sets++;
5457
5458         if (n_match_sets > wiphy->max_match_sets)
5459                 return -EINVAL;
5460
5461         if (info->attrs[NL80211_ATTR_IE])
5462                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5463         else
5464                 ie_len = 0;
5465
5466         if (ie_len > wiphy->max_sched_scan_ie_len)
5467                 return -EINVAL;
5468
5469         if (rdev->sched_scan_req) {
5470                 err = -EINPROGRESS;
5471                 goto out;
5472         }
5473
5474         request = kzalloc(sizeof(*request)
5475                         + sizeof(*request->ssids) * n_ssids
5476                         + sizeof(*request->match_sets) * n_match_sets
5477                         + sizeof(*request->channels) * n_channels
5478                         + ie_len, GFP_KERNEL);
5479         if (!request) {
5480                 err = -ENOMEM;
5481                 goto out;
5482         }
5483
5484         if (n_ssids)
5485                 request->ssids = (void *)&request->channels[n_channels];
5486         request->n_ssids = n_ssids;
5487         if (ie_len) {
5488                 if (request->ssids)
5489                         request->ie = (void *)(request->ssids + n_ssids);
5490                 else
5491                         request->ie = (void *)(request->channels + n_channels);
5492         }
5493
5494         if (n_match_sets) {
5495                 if (request->ie)
5496                         request->match_sets = (void *)(request->ie + ie_len);
5497                 else if (request->ssids)
5498                         request->match_sets =
5499                                 (void *)(request->ssids + n_ssids);
5500                 else
5501                         request->match_sets =
5502                                 (void *)(request->channels + n_channels);
5503         }
5504         request->n_match_sets = n_match_sets;
5505
5506         i = 0;
5507         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5508                 /* user specified, bail out if channel not found */
5509                 nla_for_each_nested(attr,
5510                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5511                                     tmp) {
5512                         struct ieee80211_channel *chan;
5513
5514                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5515
5516                         if (!chan) {
5517                                 err = -EINVAL;
5518                                 goto out_free;
5519                         }
5520
5521                         /* ignore disabled channels */
5522                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5523                                 continue;
5524
5525                         request->channels[i] = chan;
5526                         i++;
5527                 }
5528         } else {
5529                 /* all channels */
5530                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5531                         int j;
5532                         if (!wiphy->bands[band])
5533                                 continue;
5534                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5535                                 struct ieee80211_channel *chan;
5536
5537                                 chan = &wiphy->bands[band]->channels[j];
5538
5539                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5540                                         continue;
5541
5542                                 request->channels[i] = chan;
5543                                 i++;
5544                         }
5545                 }
5546         }
5547
5548         if (!i) {
5549                 err = -EINVAL;
5550                 goto out_free;
5551         }
5552
5553         request->n_channels = i;
5554
5555         i = 0;
5556         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5557                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5558                                     tmp) {
5559                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5560                                 err = -EINVAL;
5561                                 goto out_free;
5562                         }
5563                         request->ssids[i].ssid_len = nla_len(attr);
5564                         memcpy(request->ssids[i].ssid, nla_data(attr),
5565                                nla_len(attr));
5566                         i++;
5567                 }
5568         }
5569
5570         i = 0;
5571         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5572                 nla_for_each_nested(attr,
5573                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5574                                     tmp) {
5575                         struct nlattr *ssid, *rssi;
5576
5577                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5578                                   nla_data(attr), nla_len(attr),
5579                                   nl80211_match_policy);
5580                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5581                         if (ssid) {
5582                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5583                                         err = -EINVAL;
5584                                         goto out_free;
5585                                 }
5586                                 memcpy(request->match_sets[i].ssid.ssid,
5587                                        nla_data(ssid), nla_len(ssid));
5588                                 request->match_sets[i].ssid.ssid_len =
5589                                         nla_len(ssid);
5590                         }
5591                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5592                         if (rssi)
5593                                 request->rssi_thold = nla_get_u32(rssi);
5594                         else
5595                                 request->rssi_thold =
5596                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5597                         i++;
5598                 }
5599         }
5600
5601         if (info->attrs[NL80211_ATTR_IE]) {
5602                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5603                 memcpy((void *)request->ie,
5604                        nla_data(info->attrs[NL80211_ATTR_IE]),
5605                        request->ie_len);
5606         }
5607
5608         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5609                 request->flags = nla_get_u32(
5610                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5611                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5612                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5613                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5614                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5615                         err = -EOPNOTSUPP;
5616                         goto out_free;
5617                 }
5618         }
5619
5620         request->dev = dev;
5621         request->wiphy = &rdev->wiphy;
5622         request->interval = interval;
5623         request->scan_start = jiffies;
5624
5625         err = rdev_sched_scan_start(rdev, dev, request);
5626         if (!err) {
5627                 rdev->sched_scan_req = request;
5628                 nl80211_send_sched_scan(rdev, dev,
5629                                         NL80211_CMD_START_SCHED_SCAN);
5630                 goto out;
5631         }
5632
5633 out_free:
5634         kfree(request);
5635 out:
5636         return err;
5637 }
5638
5639 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5640                                    struct genl_info *info)
5641 {
5642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5643
5644         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5645             !rdev->ops->sched_scan_stop)
5646                 return -EOPNOTSUPP;
5647
5648         return __cfg80211_stop_sched_scan(rdev, false);
5649 }
5650
5651 static int nl80211_start_radar_detection(struct sk_buff *skb,
5652                                          struct genl_info *info)
5653 {
5654         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5655         struct net_device *dev = info->user_ptr[1];
5656         struct wireless_dev *wdev = dev->ieee80211_ptr;
5657         struct cfg80211_chan_def chandef;
5658         int err;
5659
5660         err = nl80211_parse_chandef(rdev, info, &chandef);
5661         if (err)
5662                 return err;
5663
5664         if (netif_carrier_ok(dev))
5665                 return -EBUSY;
5666
5667         if (wdev->cac_started)
5668                 return -EBUSY;
5669
5670         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5671         if (err < 0)
5672                 return err;
5673
5674         if (err == 0)
5675                 return -EINVAL;
5676
5677         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5678                 return -EINVAL;
5679
5680         if (!rdev->ops->start_radar_detection)
5681                 return -EOPNOTSUPP;
5682
5683         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5684                                            chandef.chan, CHAN_MODE_SHARED,
5685                                            BIT(chandef.width));
5686         if (err)
5687                 return err;
5688
5689         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5690         if (!err) {
5691                 wdev->channel = chandef.chan;
5692                 wdev->cac_started = true;
5693                 wdev->cac_start_time = jiffies;
5694         }
5695         return err;
5696 }
5697
5698 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
5699 {
5700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5701         struct net_device *dev = info->user_ptr[1];
5702         struct wireless_dev *wdev = dev->ieee80211_ptr;
5703         struct cfg80211_csa_settings params;
5704         /* csa_attrs is defined static to avoid waste of stack size - this
5705          * function is called under RTNL lock, so this should not be a problem.
5706          */
5707         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
5708         u8 radar_detect_width = 0;
5709         int err;
5710         bool need_new_beacon = false;
5711
5712         if (!rdev->ops->channel_switch ||
5713             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
5714                 return -EOPNOTSUPP;
5715
5716         switch (dev->ieee80211_ptr->iftype) {
5717         case NL80211_IFTYPE_AP:
5718         case NL80211_IFTYPE_P2P_GO:
5719                 need_new_beacon = true;
5720
5721                 /* useless if AP is not running */
5722                 if (!wdev->beacon_interval)
5723                         return -EINVAL;
5724                 break;
5725         case NL80211_IFTYPE_ADHOC:
5726         case NL80211_IFTYPE_MESH_POINT:
5727                 break;
5728         default:
5729                 return -EOPNOTSUPP;
5730         }
5731
5732         memset(&params, 0, sizeof(params));
5733
5734         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5735             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
5736                 return -EINVAL;
5737
5738         /* only important for AP, IBSS and mesh create IEs internally */
5739         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
5740                 return -EINVAL;
5741
5742         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
5743
5744         if (!need_new_beacon)
5745                 goto skip_beacons;
5746
5747         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
5748         if (err)
5749                 return err;
5750
5751         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
5752                                info->attrs[NL80211_ATTR_CSA_IES],
5753                                nl80211_policy);
5754         if (err)
5755                 return err;
5756
5757         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
5758         if (err)
5759                 return err;
5760
5761         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
5762                 return -EINVAL;
5763
5764         params.counter_offset_beacon =
5765                 nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
5766         if (params.counter_offset_beacon >= params.beacon_csa.tail_len)
5767                 return -EINVAL;
5768
5769         /* sanity check - counters should be the same */
5770         if (params.beacon_csa.tail[params.counter_offset_beacon] !=
5771             params.count)
5772                 return -EINVAL;
5773
5774         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
5775                 params.counter_offset_presp =
5776                         nla_get_u16(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
5777                 if (params.counter_offset_presp >=
5778                     params.beacon_csa.probe_resp_len)
5779                         return -EINVAL;
5780
5781                 if (params.beacon_csa.probe_resp[params.counter_offset_presp] !=
5782                     params.count)
5783                         return -EINVAL;
5784         }
5785
5786 skip_beacons:
5787         err = nl80211_parse_chandef(rdev, info, &params.chandef);
5788         if (err)
5789                 return err;
5790
5791         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
5792                 return -EINVAL;
5793
5794         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
5795             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO ||
5796             dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC) {
5797                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
5798                                                     &params.chandef);
5799                 if (err < 0) {
5800                         return err;
5801                 } else if (err) {
5802                         radar_detect_width = BIT(params.chandef.width);
5803                         params.radar_required = true;
5804                 }
5805         }
5806
5807         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5808                                            params.chandef.chan,
5809                                            CHAN_MODE_SHARED,
5810                                            radar_detect_width);
5811         if (err)
5812                 return err;
5813
5814         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
5815                 params.block_tx = true;
5816
5817         return rdev_channel_switch(rdev, dev, &params);
5818 }
5819
5820 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5821                             u32 seq, int flags,
5822                             struct cfg80211_registered_device *rdev,
5823                             struct wireless_dev *wdev,
5824                             struct cfg80211_internal_bss *intbss)
5825 {
5826         struct cfg80211_bss *res = &intbss->pub;
5827         const struct cfg80211_bss_ies *ies;
5828         void *hdr;
5829         struct nlattr *bss;
5830         bool tsf = false;
5831
5832         ASSERT_WDEV_LOCK(wdev);
5833
5834         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5835                              NL80211_CMD_NEW_SCAN_RESULTS);
5836         if (!hdr)
5837                 return -1;
5838
5839         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5840
5841         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
5842                 goto nla_put_failure;
5843         if (wdev->netdev &&
5844             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5845                 goto nla_put_failure;
5846         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
5847                 goto nla_put_failure;
5848
5849         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5850         if (!bss)
5851                 goto nla_put_failure;
5852         if ((!is_zero_ether_addr(res->bssid) &&
5853              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5854                 goto nla_put_failure;
5855
5856         rcu_read_lock();
5857         ies = rcu_dereference(res->ies);
5858         if (ies) {
5859                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5860                         goto fail_unlock_rcu;
5861                 tsf = true;
5862                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5863                                         ies->len, ies->data))
5864                         goto fail_unlock_rcu;
5865         }
5866         ies = rcu_dereference(res->beacon_ies);
5867         if (ies) {
5868                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5869                         goto fail_unlock_rcu;
5870                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5871                                         ies->len, ies->data))
5872                         goto fail_unlock_rcu;
5873         }
5874         rcu_read_unlock();
5875
5876         if (res->beacon_interval &&
5877             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5878                 goto nla_put_failure;
5879         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5880             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5881             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
5882             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5883                         jiffies_to_msecs(jiffies - intbss->ts)))
5884                 goto nla_put_failure;
5885
5886         switch (rdev->wiphy.signal_type) {
5887         case CFG80211_SIGNAL_TYPE_MBM:
5888                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5889                         goto nla_put_failure;
5890                 break;
5891         case CFG80211_SIGNAL_TYPE_UNSPEC:
5892                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5893                         goto nla_put_failure;
5894                 break;
5895         default:
5896                 break;
5897         }
5898
5899         switch (wdev->iftype) {
5900         case NL80211_IFTYPE_P2P_CLIENT:
5901         case NL80211_IFTYPE_STATION:
5902                 if (intbss == wdev->current_bss &&
5903                     nla_put_u32(msg, NL80211_BSS_STATUS,
5904                                 NL80211_BSS_STATUS_ASSOCIATED))
5905                         goto nla_put_failure;
5906                 break;
5907         case NL80211_IFTYPE_ADHOC:
5908                 if (intbss == wdev->current_bss &&
5909                     nla_put_u32(msg, NL80211_BSS_STATUS,
5910                                 NL80211_BSS_STATUS_IBSS_JOINED))
5911                         goto nla_put_failure;
5912                 break;
5913         default:
5914                 break;
5915         }
5916
5917         nla_nest_end(msg, bss);
5918
5919         return genlmsg_end(msg, hdr);
5920
5921  fail_unlock_rcu:
5922         rcu_read_unlock();
5923  nla_put_failure:
5924         genlmsg_cancel(msg, hdr);
5925         return -EMSGSIZE;
5926 }
5927
5928 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
5929 {
5930         struct cfg80211_registered_device *rdev;
5931         struct cfg80211_internal_bss *scan;
5932         struct wireless_dev *wdev;
5933         int start = cb->args[2], idx = 0;
5934         int err;
5935
5936         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5937         if (err)
5938                 return err;
5939
5940         wdev_lock(wdev);
5941         spin_lock_bh(&rdev->bss_lock);
5942         cfg80211_bss_expire(rdev);
5943
5944         cb->seq = rdev->bss_generation;
5945
5946         list_for_each_entry(scan, &rdev->bss_list, list) {
5947                 if (++idx <= start)
5948                         continue;
5949                 if (nl80211_send_bss(skb, cb,
5950                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5951                                 rdev, wdev, scan) < 0) {
5952                         idx--;
5953                         break;
5954                 }
5955         }
5956
5957         spin_unlock_bh(&rdev->bss_lock);
5958         wdev_unlock(wdev);
5959
5960         cb->args[2] = idx;
5961         nl80211_finish_wdev_dump(rdev);
5962
5963         return skb->len;
5964 }
5965
5966 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5967                                 int flags, struct net_device *dev,
5968                                 struct survey_info *survey)
5969 {
5970         void *hdr;
5971         struct nlattr *infoattr;
5972
5973         hdr = nl80211hdr_put(msg, portid, seq, flags,
5974                              NL80211_CMD_NEW_SURVEY_RESULTS);
5975         if (!hdr)
5976                 return -ENOMEM;
5977
5978         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5979                 goto nla_put_failure;
5980
5981         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5982         if (!infoattr)
5983                 goto nla_put_failure;
5984
5985         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5986                         survey->channel->center_freq))
5987                 goto nla_put_failure;
5988
5989         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5990             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5991                 goto nla_put_failure;
5992         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5993             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5994                 goto nla_put_failure;
5995         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5996             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5997                         survey->channel_time))
5998                 goto nla_put_failure;
5999         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
6000             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
6001                         survey->channel_time_busy))
6002                 goto nla_put_failure;
6003         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
6004             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
6005                         survey->channel_time_ext_busy))
6006                 goto nla_put_failure;
6007         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
6008             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
6009                         survey->channel_time_rx))
6010                 goto nla_put_failure;
6011         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
6012             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
6013                         survey->channel_time_tx))
6014                 goto nla_put_failure;
6015
6016         nla_nest_end(msg, infoattr);
6017
6018         return genlmsg_end(msg, hdr);
6019
6020  nla_put_failure:
6021         genlmsg_cancel(msg, hdr);
6022         return -EMSGSIZE;
6023 }
6024
6025 static int nl80211_dump_survey(struct sk_buff *skb,
6026                         struct netlink_callback *cb)
6027 {
6028         struct survey_info survey;
6029         struct cfg80211_registered_device *dev;
6030         struct wireless_dev *wdev;
6031         int survey_idx = cb->args[2];
6032         int res;
6033
6034         res = nl80211_prepare_wdev_dump(skb, cb, &dev, &wdev);
6035         if (res)
6036                 return res;
6037
6038         if (!wdev->netdev) {
6039                 res = -EINVAL;
6040                 goto out_err;
6041         }
6042
6043         if (!dev->ops->dump_survey) {
6044                 res = -EOPNOTSUPP;
6045                 goto out_err;
6046         }
6047
6048         while (1) {
6049                 struct ieee80211_channel *chan;
6050
6051                 res = rdev_dump_survey(dev, wdev->netdev, survey_idx, &survey);
6052                 if (res == -ENOENT)
6053                         break;
6054                 if (res)
6055                         goto out_err;
6056
6057                 /* Survey without a channel doesn't make sense */
6058                 if (!survey.channel) {
6059                         res = -EINVAL;
6060                         goto out;
6061                 }
6062
6063                 chan = ieee80211_get_channel(&dev->wiphy,
6064                                              survey.channel->center_freq);
6065                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
6066                         survey_idx++;
6067                         continue;
6068                 }
6069
6070                 if (nl80211_send_survey(skb,
6071                                 NETLINK_CB(cb->skb).portid,
6072                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6073                                 wdev->netdev, &survey) < 0)
6074                         goto out;
6075                 survey_idx++;
6076         }
6077
6078  out:
6079         cb->args[2] = survey_idx;
6080         res = skb->len;
6081  out_err:
6082         nl80211_finish_wdev_dump(dev);
6083         return res;
6084 }
6085
6086 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
6087 {
6088         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
6089                                   NL80211_WPA_VERSION_2));
6090 }
6091
6092 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
6093 {
6094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6095         struct net_device *dev = info->user_ptr[1];
6096         struct ieee80211_channel *chan;
6097         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
6098         int err, ssid_len, ie_len = 0, sae_data_len = 0;
6099         enum nl80211_auth_type auth_type;
6100         struct key_parse key;
6101         bool local_state_change;
6102
6103         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6104                 return -EINVAL;
6105
6106         if (!info->attrs[NL80211_ATTR_MAC])
6107                 return -EINVAL;
6108
6109         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
6110                 return -EINVAL;
6111
6112         if (!info->attrs[NL80211_ATTR_SSID])
6113                 return -EINVAL;
6114
6115         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
6116                 return -EINVAL;
6117
6118         err = nl80211_parse_key(info, &key);
6119         if (err)
6120                 return err;
6121
6122         if (key.idx >= 0) {
6123                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
6124                         return -EINVAL;
6125                 if (!key.p.key || !key.p.key_len)
6126                         return -EINVAL;
6127                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
6128                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
6129                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
6130                      key.p.key_len != WLAN_KEY_LEN_WEP104))
6131                         return -EINVAL;
6132                 if (key.idx > 4)
6133                         return -EINVAL;
6134         } else {
6135                 key.p.key_len = 0;
6136                 key.p.key = NULL;
6137         }
6138
6139         if (key.idx >= 0) {
6140                 int i;
6141                 bool ok = false;
6142                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
6143                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
6144                                 ok = true;
6145                                 break;
6146                         }
6147                 }
6148                 if (!ok)
6149                         return -EINVAL;
6150         }
6151
6152         if (!rdev->ops->auth)
6153                 return -EOPNOTSUPP;
6154
6155         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6156             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6157                 return -EOPNOTSUPP;
6158
6159         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6160         chan = ieee80211_get_channel(&rdev->wiphy,
6161                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6162         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6163                 return -EINVAL;
6164
6165         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6166         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6167
6168         if (info->attrs[NL80211_ATTR_IE]) {
6169                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6170                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6171         }
6172
6173         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6174         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
6175                 return -EINVAL;
6176
6177         if (auth_type == NL80211_AUTHTYPE_SAE &&
6178             !info->attrs[NL80211_ATTR_SAE_DATA])
6179                 return -EINVAL;
6180
6181         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
6182                 if (auth_type != NL80211_AUTHTYPE_SAE)
6183                         return -EINVAL;
6184                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
6185                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
6186                 /* need to include at least Auth Transaction and Status Code */
6187                 if (sae_data_len < 4)
6188                         return -EINVAL;
6189         }
6190
6191         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6192
6193         /*
6194          * Since we no longer track auth state, ignore
6195          * requests to only change local state.
6196          */
6197         if (local_state_change)
6198                 return 0;
6199
6200         wdev_lock(dev->ieee80211_ptr);
6201         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
6202                                  ssid, ssid_len, ie, ie_len,
6203                                  key.p.key, key.p.key_len, key.idx,
6204                                  sae_data, sae_data_len);
6205         wdev_unlock(dev->ieee80211_ptr);
6206         return err;
6207 }
6208
6209 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
6210                                    struct genl_info *info,
6211                                    struct cfg80211_crypto_settings *settings,
6212                                    int cipher_limit)
6213 {
6214         memset(settings, 0, sizeof(*settings));
6215
6216         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
6217
6218         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
6219                 u16 proto;
6220                 proto = nla_get_u16(
6221                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
6222                 settings->control_port_ethertype = cpu_to_be16(proto);
6223                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
6224                     proto != ETH_P_PAE)
6225                         return -EINVAL;
6226                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
6227                         settings->control_port_no_encrypt = true;
6228         } else
6229                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
6230
6231         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
6232                 void *data;
6233                 int len, i;
6234
6235                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6236                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
6237                 settings->n_ciphers_pairwise = len / sizeof(u32);
6238
6239                 if (len % sizeof(u32))
6240                         return -EINVAL;
6241
6242                 if (settings->n_ciphers_pairwise > cipher_limit)
6243                         return -EINVAL;
6244
6245                 memcpy(settings->ciphers_pairwise, data, len);
6246
6247                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
6248                         if (!cfg80211_supported_cipher_suite(
6249                                         &rdev->wiphy,
6250                                         settings->ciphers_pairwise[i]))
6251                                 return -EINVAL;
6252         }
6253
6254         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
6255                 settings->cipher_group =
6256                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
6257                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
6258                                                      settings->cipher_group))
6259                         return -EINVAL;
6260         }
6261
6262         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
6263                 settings->wpa_versions =
6264                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
6265                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
6266                         return -EINVAL;
6267         }
6268
6269         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
6270                 void *data;
6271                 int len;
6272
6273                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
6274                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
6275                 settings->n_akm_suites = len / sizeof(u32);
6276
6277                 if (len % sizeof(u32))
6278                         return -EINVAL;
6279
6280                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
6281                         return -EINVAL;
6282
6283                 memcpy(settings->akm_suites, data, len);
6284         }
6285
6286         return 0;
6287 }
6288
6289 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
6290 {
6291         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6292         struct net_device *dev = info->user_ptr[1];
6293         struct ieee80211_channel *chan;
6294         struct cfg80211_assoc_request req = {};
6295         const u8 *bssid, *ssid;
6296         int err, ssid_len = 0;
6297
6298         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6299                 return -EINVAL;
6300
6301         if (!info->attrs[NL80211_ATTR_MAC] ||
6302             !info->attrs[NL80211_ATTR_SSID] ||
6303             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6304                 return -EINVAL;
6305
6306         if (!rdev->ops->assoc)
6307                 return -EOPNOTSUPP;
6308
6309         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6310             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6311                 return -EOPNOTSUPP;
6312
6313         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6314
6315         chan = ieee80211_get_channel(&rdev->wiphy,
6316                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6317         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
6318                 return -EINVAL;
6319
6320         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6321         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6322
6323         if (info->attrs[NL80211_ATTR_IE]) {
6324                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6325                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6326         }
6327
6328         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6329                 enum nl80211_mfp mfp =
6330                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6331                 if (mfp == NL80211_MFP_REQUIRED)
6332                         req.use_mfp = true;
6333                 else if (mfp != NL80211_MFP_NO)
6334                         return -EINVAL;
6335         }
6336
6337         if (info->attrs[NL80211_ATTR_PREV_BSSID])
6338                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
6339
6340         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6341                 req.flags |= ASSOC_REQ_DISABLE_HT;
6342
6343         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6344                 memcpy(&req.ht_capa_mask,
6345                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6346                        sizeof(req.ht_capa_mask));
6347
6348         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6349                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6350                         return -EINVAL;
6351                 memcpy(&req.ht_capa,
6352                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6353                        sizeof(req.ht_capa));
6354         }
6355
6356         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6357                 req.flags |= ASSOC_REQ_DISABLE_VHT;
6358
6359         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6360                 memcpy(&req.vht_capa_mask,
6361                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
6362                        sizeof(req.vht_capa_mask));
6363
6364         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
6365                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
6366                         return -EINVAL;
6367                 memcpy(&req.vht_capa,
6368                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
6369                        sizeof(req.vht_capa));
6370         }
6371
6372         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
6373         if (!err) {
6374                 wdev_lock(dev->ieee80211_ptr);
6375                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
6376                                           ssid, ssid_len, &req);
6377                 wdev_unlock(dev->ieee80211_ptr);
6378         }
6379
6380         return err;
6381 }
6382
6383 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6384 {
6385         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6386         struct net_device *dev = info->user_ptr[1];
6387         const u8 *ie = NULL, *bssid;
6388         int ie_len = 0, err;
6389         u16 reason_code;
6390         bool local_state_change;
6391
6392         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6393                 return -EINVAL;
6394
6395         if (!info->attrs[NL80211_ATTR_MAC])
6396                 return -EINVAL;
6397
6398         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6399                 return -EINVAL;
6400
6401         if (!rdev->ops->deauth)
6402                 return -EOPNOTSUPP;
6403
6404         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6405             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6406                 return -EOPNOTSUPP;
6407
6408         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6409
6410         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6411         if (reason_code == 0) {
6412                 /* Reason Code 0 is reserved */
6413                 return -EINVAL;
6414         }
6415
6416         if (info->attrs[NL80211_ATTR_IE]) {
6417                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6418                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6419         }
6420
6421         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6422
6423         wdev_lock(dev->ieee80211_ptr);
6424         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6425                                    local_state_change);
6426         wdev_unlock(dev->ieee80211_ptr);
6427         return err;
6428 }
6429
6430 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6431 {
6432         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6433         struct net_device *dev = info->user_ptr[1];
6434         const u8 *ie = NULL, *bssid;
6435         int ie_len = 0, err;
6436         u16 reason_code;
6437         bool local_state_change;
6438
6439         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6440                 return -EINVAL;
6441
6442         if (!info->attrs[NL80211_ATTR_MAC])
6443                 return -EINVAL;
6444
6445         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6446                 return -EINVAL;
6447
6448         if (!rdev->ops->disassoc)
6449                 return -EOPNOTSUPP;
6450
6451         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6452             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6453                 return -EOPNOTSUPP;
6454
6455         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6456
6457         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6458         if (reason_code == 0) {
6459                 /* Reason Code 0 is reserved */
6460                 return -EINVAL;
6461         }
6462
6463         if (info->attrs[NL80211_ATTR_IE]) {
6464                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6465                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6466         }
6467
6468         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6469
6470         wdev_lock(dev->ieee80211_ptr);
6471         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6472                                      local_state_change);
6473         wdev_unlock(dev->ieee80211_ptr);
6474         return err;
6475 }
6476
6477 static bool
6478 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6479                          int mcast_rate[IEEE80211_NUM_BANDS],
6480                          int rateval)
6481 {
6482         struct wiphy *wiphy = &rdev->wiphy;
6483         bool found = false;
6484         int band, i;
6485
6486         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6487                 struct ieee80211_supported_band *sband;
6488
6489                 sband = wiphy->bands[band];
6490                 if (!sband)
6491                         continue;
6492
6493                 for (i = 0; i < sband->n_bitrates; i++) {
6494                         if (sband->bitrates[i].bitrate == rateval) {
6495                                 mcast_rate[band] = i + 1;
6496                                 found = true;
6497                                 break;
6498                         }
6499                 }
6500         }
6501
6502         return found;
6503 }
6504
6505 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6506 {
6507         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6508         struct net_device *dev = info->user_ptr[1];
6509         struct cfg80211_ibss_params ibss;
6510         struct wiphy *wiphy;
6511         struct cfg80211_cached_keys *connkeys = NULL;
6512         int err;
6513
6514         memset(&ibss, 0, sizeof(ibss));
6515
6516         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6517                 return -EINVAL;
6518
6519         if (!info->attrs[NL80211_ATTR_SSID] ||
6520             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6521                 return -EINVAL;
6522
6523         ibss.beacon_interval = 100;
6524
6525         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6526                 ibss.beacon_interval =
6527                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6528                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6529                         return -EINVAL;
6530         }
6531
6532         if (!rdev->ops->join_ibss)
6533                 return -EOPNOTSUPP;
6534
6535         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6536                 return -EOPNOTSUPP;
6537
6538         wiphy = &rdev->wiphy;
6539
6540         if (info->attrs[NL80211_ATTR_MAC]) {
6541                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6542
6543                 if (!is_valid_ether_addr(ibss.bssid))
6544                         return -EINVAL;
6545         }
6546         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6547         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6548
6549         if (info->attrs[NL80211_ATTR_IE]) {
6550                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6551                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6552         }
6553
6554         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6555         if (err)
6556                 return err;
6557
6558         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6559                 return -EINVAL;
6560
6561         switch (ibss.chandef.width) {
6562         case NL80211_CHAN_WIDTH_5:
6563         case NL80211_CHAN_WIDTH_10:
6564         case NL80211_CHAN_WIDTH_20_NOHT:
6565                 break;
6566         case NL80211_CHAN_WIDTH_20:
6567         case NL80211_CHAN_WIDTH_40:
6568                 if (rdev->wiphy.features & NL80211_FEATURE_HT_IBSS)
6569                         break;
6570         default:
6571                 return -EINVAL;
6572         }
6573
6574         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6575         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6576
6577         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6578                 u8 *rates =
6579                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6580                 int n_rates =
6581                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6582                 struct ieee80211_supported_band *sband =
6583                         wiphy->bands[ibss.chandef.chan->band];
6584
6585                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6586                                              &ibss.basic_rates);
6587                 if (err)
6588                         return err;
6589         }
6590
6591         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6592                 memcpy(&ibss.ht_capa_mask,
6593                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6594                        sizeof(ibss.ht_capa_mask));
6595
6596         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6597                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6598                         return -EINVAL;
6599                 memcpy(&ibss.ht_capa,
6600                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6601                        sizeof(ibss.ht_capa));
6602         }
6603
6604         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6605             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6606                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6607                 return -EINVAL;
6608
6609         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6610                 bool no_ht = false;
6611
6612                 connkeys = nl80211_parse_connkeys(rdev,
6613                                           info->attrs[NL80211_ATTR_KEYS],
6614                                           &no_ht);
6615                 if (IS_ERR(connkeys))
6616                         return PTR_ERR(connkeys);
6617
6618                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6619                     no_ht) {
6620                         kfree(connkeys);
6621                         return -EINVAL;
6622                 }
6623         }
6624
6625         ibss.control_port =
6626                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6627
6628         ibss.userspace_handles_dfs =
6629                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
6630
6631         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6632         if (err)
6633                 kfree(connkeys);
6634         return err;
6635 }
6636
6637 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6638 {
6639         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6640         struct net_device *dev = info->user_ptr[1];
6641
6642         if (!rdev->ops->leave_ibss)
6643                 return -EOPNOTSUPP;
6644
6645         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6646                 return -EOPNOTSUPP;
6647
6648         return cfg80211_leave_ibss(rdev, dev, false);
6649 }
6650
6651 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6652 {
6653         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6654         struct net_device *dev = info->user_ptr[1];
6655         int mcast_rate[IEEE80211_NUM_BANDS];
6656         u32 nla_rate;
6657         int err;
6658
6659         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6660             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6661                 return -EOPNOTSUPP;
6662
6663         if (!rdev->ops->set_mcast_rate)
6664                 return -EOPNOTSUPP;
6665
6666         memset(mcast_rate, 0, sizeof(mcast_rate));
6667
6668         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6669                 return -EINVAL;
6670
6671         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6672         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6673                 return -EINVAL;
6674
6675         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6676
6677         return err;
6678 }
6679
6680
6681 #ifdef CONFIG_NL80211_TESTMODE
6682 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6683 {
6684         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6685         struct wireless_dev *wdev =
6686                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
6687         int err;
6688
6689         if (!rdev->ops->testmode_cmd)
6690                 return -EOPNOTSUPP;
6691
6692         if (IS_ERR(wdev)) {
6693                 err = PTR_ERR(wdev);
6694                 if (err != -EINVAL)
6695                         return err;
6696                 wdev = NULL;
6697         } else if (wdev->wiphy != &rdev->wiphy) {
6698                 return -EINVAL;
6699         }
6700
6701         if (!info->attrs[NL80211_ATTR_TESTDATA])
6702                 return -EINVAL;
6703
6704         rdev->testmode_info = info;
6705         err = rdev_testmode_cmd(rdev, wdev,
6706                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6707                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6708         rdev->testmode_info = NULL;
6709
6710         return err;
6711 }
6712
6713 static int nl80211_testmode_dump(struct sk_buff *skb,
6714                                  struct netlink_callback *cb)
6715 {
6716         struct cfg80211_registered_device *rdev;
6717         int err;
6718         long phy_idx;
6719         void *data = NULL;
6720         int data_len = 0;
6721
6722         rtnl_lock();
6723
6724         if (cb->args[0]) {
6725                 /*
6726                  * 0 is a valid index, but not valid for args[0],
6727                  * so we need to offset by 1.
6728                  */
6729                 phy_idx = cb->args[0] - 1;
6730         } else {
6731                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6732                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6733                                   nl80211_policy);
6734                 if (err)
6735                         goto out_err;
6736
6737                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6738                                                   nl80211_fam.attrbuf);
6739                 if (IS_ERR(rdev)) {
6740                         err = PTR_ERR(rdev);
6741                         goto out_err;
6742                 }
6743                 phy_idx = rdev->wiphy_idx;
6744                 rdev = NULL;
6745
6746                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6747                         cb->args[1] =
6748                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6749         }
6750
6751         if (cb->args[1]) {
6752                 data = nla_data((void *)cb->args[1]);
6753                 data_len = nla_len((void *)cb->args[1]);
6754         }
6755
6756         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6757         if (!rdev) {
6758                 err = -ENOENT;
6759                 goto out_err;
6760         }
6761
6762         if (!rdev->ops->testmode_dump) {
6763                 err = -EOPNOTSUPP;
6764                 goto out_err;
6765         }
6766
6767         while (1) {
6768                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6769                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6770                                            NL80211_CMD_TESTMODE);
6771                 struct nlattr *tmdata;
6772
6773                 if (!hdr)
6774                         break;
6775
6776                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6777                         genlmsg_cancel(skb, hdr);
6778                         break;
6779                 }
6780
6781                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6782                 if (!tmdata) {
6783                         genlmsg_cancel(skb, hdr);
6784                         break;
6785                 }
6786                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6787                 nla_nest_end(skb, tmdata);
6788
6789                 if (err == -ENOBUFS || err == -ENOENT) {
6790                         genlmsg_cancel(skb, hdr);
6791                         break;
6792                 } else if (err) {
6793                         genlmsg_cancel(skb, hdr);
6794                         goto out_err;
6795                 }
6796
6797                 genlmsg_end(skb, hdr);
6798         }
6799
6800         err = skb->len;
6801         /* see above */
6802         cb->args[0] = phy_idx + 1;
6803  out_err:
6804         rtnl_unlock();
6805         return err;
6806 }
6807
6808 static struct sk_buff *
6809 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6810                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6811 {
6812         struct sk_buff *skb;
6813         void *hdr;
6814         struct nlattr *data;
6815
6816         skb = nlmsg_new(approxlen + 100, gfp);
6817         if (!skb)
6818                 return NULL;
6819
6820         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6821         if (!hdr) {
6822                 kfree_skb(skb);
6823                 return NULL;
6824         }
6825
6826         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6827                 goto nla_put_failure;
6828         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6829
6830         ((void **)skb->cb)[0] = rdev;
6831         ((void **)skb->cb)[1] = hdr;
6832         ((void **)skb->cb)[2] = data;
6833
6834         return skb;
6835
6836  nla_put_failure:
6837         kfree_skb(skb);
6838         return NULL;
6839 }
6840
6841 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6842                                                   int approxlen)
6843 {
6844         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6845
6846         if (WARN_ON(!rdev->testmode_info))
6847                 return NULL;
6848
6849         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6850                                 rdev->testmode_info->snd_portid,
6851                                 rdev->testmode_info->snd_seq,
6852                                 GFP_KERNEL);
6853 }
6854 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6855
6856 int cfg80211_testmode_reply(struct sk_buff *skb)
6857 {
6858         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6859         void *hdr = ((void **)skb->cb)[1];
6860         struct nlattr *data = ((void **)skb->cb)[2];
6861
6862         if (WARN_ON(!rdev->testmode_info)) {
6863                 kfree_skb(skb);
6864                 return -EINVAL;
6865         }
6866
6867         nla_nest_end(skb, data);
6868         genlmsg_end(skb, hdr);
6869         return genlmsg_reply(skb, rdev->testmode_info);
6870 }
6871 EXPORT_SYMBOL(cfg80211_testmode_reply);
6872
6873 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6874                                                   int approxlen, gfp_t gfp)
6875 {
6876         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6877
6878         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6879 }
6880 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6881
6882 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6883 {
6884         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6885         void *hdr = ((void **)skb->cb)[1];
6886         struct nlattr *data = ((void **)skb->cb)[2];
6887
6888         nla_nest_end(skb, data);
6889         genlmsg_end(skb, hdr);
6890         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
6891                                 NL80211_MCGRP_TESTMODE, gfp);
6892 }
6893 EXPORT_SYMBOL(cfg80211_testmode_event);
6894 #endif
6895
6896 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6897 {
6898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6899         struct net_device *dev = info->user_ptr[1];
6900         struct cfg80211_connect_params connect;
6901         struct wiphy *wiphy;
6902         struct cfg80211_cached_keys *connkeys = NULL;
6903         int err;
6904
6905         memset(&connect, 0, sizeof(connect));
6906
6907         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6908                 return -EINVAL;
6909
6910         if (!info->attrs[NL80211_ATTR_SSID] ||
6911             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6912                 return -EINVAL;
6913
6914         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6915                 connect.auth_type =
6916                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6917                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6918                                              NL80211_CMD_CONNECT))
6919                         return -EINVAL;
6920         } else
6921                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6922
6923         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6924
6925         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6926                                       NL80211_MAX_NR_CIPHER_SUITES);
6927         if (err)
6928                 return err;
6929
6930         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6931             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6932                 return -EOPNOTSUPP;
6933
6934         wiphy = &rdev->wiphy;
6935
6936         connect.bg_scan_period = -1;
6937         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6938                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6939                 connect.bg_scan_period =
6940                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6941         }
6942
6943         if (info->attrs[NL80211_ATTR_MAC])
6944                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6945         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6946         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6947
6948         if (info->attrs[NL80211_ATTR_IE]) {
6949                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6950                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6951         }
6952
6953         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6954                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6955                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6956                     connect.mfp != NL80211_MFP_NO)
6957                         return -EINVAL;
6958         } else {
6959                 connect.mfp = NL80211_MFP_NO;
6960         }
6961
6962         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6963                 connect.channel =
6964                         ieee80211_get_channel(wiphy,
6965                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6966                 if (!connect.channel ||
6967                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6968                         return -EINVAL;
6969         }
6970
6971         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6972                 connkeys = nl80211_parse_connkeys(rdev,
6973                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6974                 if (IS_ERR(connkeys))
6975                         return PTR_ERR(connkeys);
6976         }
6977
6978         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6979                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6980
6981         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6982                 memcpy(&connect.ht_capa_mask,
6983                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6984                        sizeof(connect.ht_capa_mask));
6985
6986         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6987                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6988                         kfree(connkeys);
6989                         return -EINVAL;
6990                 }
6991                 memcpy(&connect.ht_capa,
6992                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6993                        sizeof(connect.ht_capa));
6994         }
6995
6996         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
6997                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
6998
6999         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7000                 memcpy(&connect.vht_capa_mask,
7001                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7002                        sizeof(connect.vht_capa_mask));
7003
7004         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7005                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7006                         kfree(connkeys);
7007                         return -EINVAL;
7008                 }
7009                 memcpy(&connect.vht_capa,
7010                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7011                        sizeof(connect.vht_capa));
7012         }
7013
7014         wdev_lock(dev->ieee80211_ptr);
7015         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
7016         wdev_unlock(dev->ieee80211_ptr);
7017         if (err)
7018                 kfree(connkeys);
7019         return err;
7020 }
7021
7022 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
7023 {
7024         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7025         struct net_device *dev = info->user_ptr[1];
7026         u16 reason;
7027         int ret;
7028
7029         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7030                 reason = WLAN_REASON_DEAUTH_LEAVING;
7031         else
7032                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7033
7034         if (reason == 0)
7035                 return -EINVAL;
7036
7037         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7038             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7039                 return -EOPNOTSUPP;
7040
7041         wdev_lock(dev->ieee80211_ptr);
7042         ret = cfg80211_disconnect(rdev, dev, reason, true);
7043         wdev_unlock(dev->ieee80211_ptr);
7044         return ret;
7045 }
7046
7047 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
7048 {
7049         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7050         struct net *net;
7051         int err;
7052         u32 pid;
7053
7054         if (!info->attrs[NL80211_ATTR_PID])
7055                 return -EINVAL;
7056
7057         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
7058
7059         net = get_net_ns_by_pid(pid);
7060         if (IS_ERR(net))
7061                 return PTR_ERR(net);
7062
7063         err = 0;
7064
7065         /* check if anything to do */
7066         if (!net_eq(wiphy_net(&rdev->wiphy), net))
7067                 err = cfg80211_switch_netns(rdev, net);
7068
7069         put_net(net);
7070         return err;
7071 }
7072
7073 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
7074 {
7075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7076         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
7077                         struct cfg80211_pmksa *pmksa) = NULL;
7078         struct net_device *dev = info->user_ptr[1];
7079         struct cfg80211_pmksa pmksa;
7080
7081         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
7082
7083         if (!info->attrs[NL80211_ATTR_MAC])
7084                 return -EINVAL;
7085
7086         if (!info->attrs[NL80211_ATTR_PMKID])
7087                 return -EINVAL;
7088
7089         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
7090         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7091
7092         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7093             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7094                 return -EOPNOTSUPP;
7095
7096         switch (info->genlhdr->cmd) {
7097         case NL80211_CMD_SET_PMKSA:
7098                 rdev_ops = rdev->ops->set_pmksa;
7099                 break;
7100         case NL80211_CMD_DEL_PMKSA:
7101                 rdev_ops = rdev->ops->del_pmksa;
7102                 break;
7103         default:
7104                 WARN_ON(1);
7105                 break;
7106         }
7107
7108         if (!rdev_ops)
7109                 return -EOPNOTSUPP;
7110
7111         return rdev_ops(&rdev->wiphy, dev, &pmksa);
7112 }
7113
7114 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
7115 {
7116         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7117         struct net_device *dev = info->user_ptr[1];
7118
7119         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7120             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7121                 return -EOPNOTSUPP;
7122
7123         if (!rdev->ops->flush_pmksa)
7124                 return -EOPNOTSUPP;
7125
7126         return rdev_flush_pmksa(rdev, dev);
7127 }
7128
7129 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
7130 {
7131         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7132         struct net_device *dev = info->user_ptr[1];
7133         u8 action_code, dialog_token;
7134         u16 status_code;
7135         u8 *peer;
7136
7137         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7138             !rdev->ops->tdls_mgmt)
7139                 return -EOPNOTSUPP;
7140
7141         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
7142             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
7143             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
7144             !info->attrs[NL80211_ATTR_IE] ||
7145             !info->attrs[NL80211_ATTR_MAC])
7146                 return -EINVAL;
7147
7148         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7149         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
7150         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
7151         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
7152
7153         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
7154                               dialog_token, status_code,
7155                               nla_data(info->attrs[NL80211_ATTR_IE]),
7156                               nla_len(info->attrs[NL80211_ATTR_IE]));
7157 }
7158
7159 static int nl80211_tdls_oper(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         enum nl80211_tdls_operation operation;
7164         u8 *peer;
7165
7166         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
7167             !rdev->ops->tdls_oper)
7168                 return -EOPNOTSUPP;
7169
7170         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
7171             !info->attrs[NL80211_ATTR_MAC])
7172                 return -EINVAL;
7173
7174         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
7175         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
7176
7177         return rdev_tdls_oper(rdev, dev, peer, operation);
7178 }
7179
7180 static int nl80211_remain_on_channel(struct sk_buff *skb,
7181                                      struct genl_info *info)
7182 {
7183         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7184         struct wireless_dev *wdev = info->user_ptr[1];
7185         struct cfg80211_chan_def chandef;
7186         struct sk_buff *msg;
7187         void *hdr;
7188         u64 cookie;
7189         u32 duration;
7190         int err;
7191
7192         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7193             !info->attrs[NL80211_ATTR_DURATION])
7194                 return -EINVAL;
7195
7196         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7197
7198         if (!rdev->ops->remain_on_channel ||
7199             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
7200                 return -EOPNOTSUPP;
7201
7202         /*
7203          * We should be on that channel for at least a minimum amount of
7204          * time (10ms) but no longer than the driver supports.
7205          */
7206         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7207             duration > rdev->wiphy.max_remain_on_channel_duration)
7208                 return -EINVAL;
7209
7210         err = nl80211_parse_chandef(rdev, info, &chandef);
7211         if (err)
7212                 return err;
7213
7214         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7215         if (!msg)
7216                 return -ENOMEM;
7217
7218         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7219                              NL80211_CMD_REMAIN_ON_CHANNEL);
7220         if (!hdr) {
7221                 err = -ENOBUFS;
7222                 goto free_msg;
7223         }
7224
7225         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
7226                                      duration, &cookie);
7227
7228         if (err)
7229                 goto free_msg;
7230
7231         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7232                 goto nla_put_failure;
7233
7234         genlmsg_end(msg, hdr);
7235
7236         return genlmsg_reply(msg, info);
7237
7238  nla_put_failure:
7239         err = -ENOBUFS;
7240  free_msg:
7241         nlmsg_free(msg);
7242         return err;
7243 }
7244
7245 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
7246                                             struct genl_info *info)
7247 {
7248         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7249         struct wireless_dev *wdev = info->user_ptr[1];
7250         u64 cookie;
7251
7252         if (!info->attrs[NL80211_ATTR_COOKIE])
7253                 return -EINVAL;
7254
7255         if (!rdev->ops->cancel_remain_on_channel)
7256                 return -EOPNOTSUPP;
7257
7258         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7259
7260         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
7261 }
7262
7263 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
7264                            u8 *rates, u8 rates_len)
7265 {
7266         u8 i;
7267         u32 mask = 0;
7268
7269         for (i = 0; i < rates_len; i++) {
7270                 int rate = (rates[i] & 0x7f) * 5;
7271                 int ridx;
7272                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
7273                         struct ieee80211_rate *srate =
7274                                 &sband->bitrates[ridx];
7275                         if (rate == srate->bitrate) {
7276                                 mask |= 1 << ridx;
7277                                 break;
7278                         }
7279                 }
7280                 if (ridx == sband->n_bitrates)
7281                         return 0; /* rate not found */
7282         }
7283
7284         return mask;
7285 }
7286
7287 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
7288                                u8 *rates, u8 rates_len,
7289                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
7290 {
7291         u8 i;
7292
7293         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
7294
7295         for (i = 0; i < rates_len; i++) {
7296                 int ridx, rbit;
7297
7298                 ridx = rates[i] / 8;
7299                 rbit = BIT(rates[i] % 8);
7300
7301                 /* check validity */
7302                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
7303                         return false;
7304
7305                 /* check availability */
7306                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
7307                         mcs[ridx] |= rbit;
7308                 else
7309                         return false;
7310         }
7311
7312         return true;
7313 }
7314
7315 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
7316         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
7317                                     .len = NL80211_MAX_SUPP_RATES },
7318         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
7319                                  .len = NL80211_MAX_SUPP_HT_RATES },
7320 };
7321
7322 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
7323                                        struct genl_info *info)
7324 {
7325         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
7326         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7327         struct cfg80211_bitrate_mask mask;
7328         int rem, i;
7329         struct net_device *dev = info->user_ptr[1];
7330         struct nlattr *tx_rates;
7331         struct ieee80211_supported_band *sband;
7332
7333         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
7334                 return -EINVAL;
7335
7336         if (!rdev->ops->set_bitrate_mask)
7337                 return -EOPNOTSUPP;
7338
7339         memset(&mask, 0, sizeof(mask));
7340         /* Default to all rates enabled */
7341         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
7342                 sband = rdev->wiphy.bands[i];
7343                 mask.control[i].legacy =
7344                         sband ? (1 << sband->n_bitrates) - 1 : 0;
7345                 if (sband)
7346                         memcpy(mask.control[i].mcs,
7347                                sband->ht_cap.mcs.rx_mask,
7348                                sizeof(mask.control[i].mcs));
7349                 else
7350                         memset(mask.control[i].mcs, 0,
7351                                sizeof(mask.control[i].mcs));
7352         }
7353
7354         /*
7355          * The nested attribute uses enum nl80211_band as the index. This maps
7356          * directly to the enum ieee80211_band values used in cfg80211.
7357          */
7358         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
7359         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
7360         {
7361                 enum ieee80211_band band = nla_type(tx_rates);
7362                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
7363                         return -EINVAL;
7364                 sband = rdev->wiphy.bands[band];
7365                 if (sband == NULL)
7366                         return -EINVAL;
7367                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
7368                           nla_len(tx_rates), nl80211_txattr_policy);
7369                 if (tb[NL80211_TXRATE_LEGACY]) {
7370                         mask.control[band].legacy = rateset_to_mask(
7371                                 sband,
7372                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
7373                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
7374                         if ((mask.control[band].legacy == 0) &&
7375                             nla_len(tb[NL80211_TXRATE_LEGACY]))
7376                                 return -EINVAL;
7377                 }
7378                 if (tb[NL80211_TXRATE_MCS]) {
7379                         if (!ht_rateset_to_mask(
7380                                         sband,
7381                                         nla_data(tb[NL80211_TXRATE_MCS]),
7382                                         nla_len(tb[NL80211_TXRATE_MCS]),
7383                                         mask.control[band].mcs))
7384                                 return -EINVAL;
7385                 }
7386
7387                 if (mask.control[band].legacy == 0) {
7388                         /* don't allow empty legacy rates if HT
7389                          * is not even supported. */
7390                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
7391                                 return -EINVAL;
7392
7393                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
7394                                 if (mask.control[band].mcs[i])
7395                                         break;
7396
7397                         /* legacy and mcs rates may not be both empty */
7398                         if (i == IEEE80211_HT_MCS_MASK_LEN)
7399                                 return -EINVAL;
7400                 }
7401         }
7402
7403         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
7404 }
7405
7406 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
7407 {
7408         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7409         struct wireless_dev *wdev = info->user_ptr[1];
7410         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
7411
7412         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
7413                 return -EINVAL;
7414
7415         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
7416                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
7417
7418         switch (wdev->iftype) {
7419         case NL80211_IFTYPE_STATION:
7420         case NL80211_IFTYPE_ADHOC:
7421         case NL80211_IFTYPE_P2P_CLIENT:
7422         case NL80211_IFTYPE_AP:
7423         case NL80211_IFTYPE_AP_VLAN:
7424         case NL80211_IFTYPE_MESH_POINT:
7425         case NL80211_IFTYPE_P2P_GO:
7426         case NL80211_IFTYPE_P2P_DEVICE:
7427                 break;
7428         default:
7429                 return -EOPNOTSUPP;
7430         }
7431
7432         /* not much point in registering if we can't reply */
7433         if (!rdev->ops->mgmt_tx)
7434                 return -EOPNOTSUPP;
7435
7436         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7437                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7438                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7439 }
7440
7441 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7442 {
7443         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7444         struct wireless_dev *wdev = info->user_ptr[1];
7445         struct cfg80211_chan_def chandef;
7446         int err;
7447         void *hdr = NULL;
7448         u64 cookie;
7449         struct sk_buff *msg = NULL;
7450         unsigned int wait = 0;
7451         bool offchan, no_cck, dont_wait_for_ack;
7452
7453         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7454
7455         if (!info->attrs[NL80211_ATTR_FRAME])
7456                 return -EINVAL;
7457
7458         if (!rdev->ops->mgmt_tx)
7459                 return -EOPNOTSUPP;
7460
7461         switch (wdev->iftype) {
7462         case NL80211_IFTYPE_P2P_DEVICE:
7463                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7464                         return -EINVAL;
7465         case NL80211_IFTYPE_STATION:
7466         case NL80211_IFTYPE_ADHOC:
7467         case NL80211_IFTYPE_P2P_CLIENT:
7468         case NL80211_IFTYPE_AP:
7469         case NL80211_IFTYPE_AP_VLAN:
7470         case NL80211_IFTYPE_MESH_POINT:
7471         case NL80211_IFTYPE_P2P_GO:
7472                 break;
7473         default:
7474                 return -EOPNOTSUPP;
7475         }
7476
7477         if (info->attrs[NL80211_ATTR_DURATION]) {
7478                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7479                         return -EINVAL;
7480                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7481
7482                 /*
7483                  * We should wait on the channel for at least a minimum amount
7484                  * of time (10ms) but no longer than the driver supports.
7485                  */
7486                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7487                     wait > rdev->wiphy.max_remain_on_channel_duration)
7488                         return -EINVAL;
7489
7490         }
7491
7492         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7493
7494         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7495                 return -EINVAL;
7496
7497         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7498
7499         /* get the channel if any has been specified, otherwise pass NULL to
7500          * the driver. The latter will use the current one
7501          */
7502         chandef.chan = NULL;
7503         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7504                 err = nl80211_parse_chandef(rdev, info, &chandef);
7505                 if (err)
7506                         return err;
7507         }
7508
7509         if (!chandef.chan && offchan)
7510                 return -EINVAL;
7511
7512         if (!dont_wait_for_ack) {
7513                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7514                 if (!msg)
7515                         return -ENOMEM;
7516
7517                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7518                                      NL80211_CMD_FRAME);
7519                 if (!hdr) {
7520                         err = -ENOBUFS;
7521                         goto free_msg;
7522                 }
7523         }
7524
7525         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7526                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7527                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7528                                     no_cck, dont_wait_for_ack, &cookie);
7529         if (err)
7530                 goto free_msg;
7531
7532         if (msg) {
7533                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7534                         goto nla_put_failure;
7535
7536                 genlmsg_end(msg, hdr);
7537                 return genlmsg_reply(msg, info);
7538         }
7539
7540         return 0;
7541
7542  nla_put_failure:
7543         err = -ENOBUFS;
7544  free_msg:
7545         nlmsg_free(msg);
7546         return err;
7547 }
7548
7549 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7550 {
7551         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7552         struct wireless_dev *wdev = info->user_ptr[1];
7553         u64 cookie;
7554
7555         if (!info->attrs[NL80211_ATTR_COOKIE])
7556                 return -EINVAL;
7557
7558         if (!rdev->ops->mgmt_tx_cancel_wait)
7559                 return -EOPNOTSUPP;
7560
7561         switch (wdev->iftype) {
7562         case NL80211_IFTYPE_STATION:
7563         case NL80211_IFTYPE_ADHOC:
7564         case NL80211_IFTYPE_P2P_CLIENT:
7565         case NL80211_IFTYPE_AP:
7566         case NL80211_IFTYPE_AP_VLAN:
7567         case NL80211_IFTYPE_P2P_GO:
7568         case NL80211_IFTYPE_P2P_DEVICE:
7569                 break;
7570         default:
7571                 return -EOPNOTSUPP;
7572         }
7573
7574         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7575
7576         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7577 }
7578
7579 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7580 {
7581         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7582         struct wireless_dev *wdev;
7583         struct net_device *dev = info->user_ptr[1];
7584         u8 ps_state;
7585         bool state;
7586         int err;
7587
7588         if (!info->attrs[NL80211_ATTR_PS_STATE])
7589                 return -EINVAL;
7590
7591         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7592
7593         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7594                 return -EINVAL;
7595
7596         wdev = dev->ieee80211_ptr;
7597
7598         if (!rdev->ops->set_power_mgmt)
7599                 return -EOPNOTSUPP;
7600
7601         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7602
7603         if (state == wdev->ps)
7604                 return 0;
7605
7606         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7607         if (!err)
7608                 wdev->ps = state;
7609         return err;
7610 }
7611
7612 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7613 {
7614         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7615         enum nl80211_ps_state ps_state;
7616         struct wireless_dev *wdev;
7617         struct net_device *dev = info->user_ptr[1];
7618         struct sk_buff *msg;
7619         void *hdr;
7620         int err;
7621
7622         wdev = dev->ieee80211_ptr;
7623
7624         if (!rdev->ops->set_power_mgmt)
7625                 return -EOPNOTSUPP;
7626
7627         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7628         if (!msg)
7629                 return -ENOMEM;
7630
7631         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7632                              NL80211_CMD_GET_POWER_SAVE);
7633         if (!hdr) {
7634                 err = -ENOBUFS;
7635                 goto free_msg;
7636         }
7637
7638         if (wdev->ps)
7639                 ps_state = NL80211_PS_ENABLED;
7640         else
7641                 ps_state = NL80211_PS_DISABLED;
7642
7643         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7644                 goto nla_put_failure;
7645
7646         genlmsg_end(msg, hdr);
7647         return genlmsg_reply(msg, info);
7648
7649  nla_put_failure:
7650         err = -ENOBUFS;
7651  free_msg:
7652         nlmsg_free(msg);
7653         return err;
7654 }
7655
7656 static struct nla_policy
7657 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7658         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7659         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7660         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7661         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7662         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7663         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7664 };
7665
7666 static int nl80211_set_cqm_txe(struct genl_info *info,
7667                                u32 rate, u32 pkts, u32 intvl)
7668 {
7669         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7670         struct net_device *dev = info->user_ptr[1];
7671         struct wireless_dev *wdev = dev->ieee80211_ptr;
7672
7673         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7674                 return -EINVAL;
7675
7676         if (!rdev->ops->set_cqm_txe_config)
7677                 return -EOPNOTSUPP;
7678
7679         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7680             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7681                 return -EOPNOTSUPP;
7682
7683         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7684 }
7685
7686 static int nl80211_set_cqm_rssi(struct genl_info *info,
7687                                 s32 threshold, u32 hysteresis)
7688 {
7689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7690         struct net_device *dev = info->user_ptr[1];
7691         struct wireless_dev *wdev = dev->ieee80211_ptr;
7692
7693         if (threshold > 0)
7694                 return -EINVAL;
7695
7696         /* disabling - hysteresis should also be zero then */
7697         if (threshold == 0)
7698                 hysteresis = 0;
7699
7700         if (!rdev->ops->set_cqm_rssi_config)
7701                 return -EOPNOTSUPP;
7702
7703         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7704             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7705                 return -EOPNOTSUPP;
7706
7707         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7708 }
7709
7710 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7711 {
7712         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7713         struct nlattr *cqm;
7714         int err;
7715
7716         cqm = info->attrs[NL80211_ATTR_CQM];
7717         if (!cqm)
7718                 return -EINVAL;
7719
7720         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7721                                nl80211_attr_cqm_policy);
7722         if (err)
7723                 return err;
7724
7725         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7726             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7727                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7728                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7729
7730                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
7731         }
7732
7733         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7734             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7735             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7736                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7737                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7738                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7739
7740                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
7741         }
7742
7743         return -EINVAL;
7744 }
7745
7746 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7747 {
7748         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7749         struct net_device *dev = info->user_ptr[1];
7750         struct mesh_config cfg;
7751         struct mesh_setup setup;
7752         int err;
7753
7754         /* start with default */
7755         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7756         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7757
7758         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7759                 /* and parse parameters if given */
7760                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7761                 if (err)
7762                         return err;
7763         }
7764
7765         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7766             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7767                 return -EINVAL;
7768
7769         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7770         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7771
7772         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7773             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7774                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7775                         return -EINVAL;
7776
7777         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7778                 setup.beacon_interval =
7779                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7780                 if (setup.beacon_interval < 10 ||
7781                     setup.beacon_interval > 10000)
7782                         return -EINVAL;
7783         }
7784
7785         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7786                 setup.dtim_period =
7787                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7788                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7789                         return -EINVAL;
7790         }
7791
7792         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7793                 /* parse additional setup parameters if given */
7794                 err = nl80211_parse_mesh_setup(info, &setup);
7795                 if (err)
7796                         return err;
7797         }
7798
7799         if (setup.user_mpm)
7800                 cfg.auto_open_plinks = false;
7801
7802         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7803                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7804                 if (err)
7805                         return err;
7806         } else {
7807                 /* cfg80211_join_mesh() will sort it out */
7808                 setup.chandef.chan = NULL;
7809         }
7810
7811         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7812                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7813                 int n_rates =
7814                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7815                 struct ieee80211_supported_band *sband;
7816
7817                 if (!setup.chandef.chan)
7818                         return -EINVAL;
7819
7820                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
7821
7822                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7823                                              &setup.basic_rates);
7824                 if (err)
7825                         return err;
7826         }
7827
7828         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7829 }
7830
7831 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7832 {
7833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7834         struct net_device *dev = info->user_ptr[1];
7835
7836         return cfg80211_leave_mesh(rdev, dev);
7837 }
7838
7839 #ifdef CONFIG_PM
7840 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7841                                         struct cfg80211_registered_device *rdev)
7842 {
7843         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
7844         struct nlattr *nl_pats, *nl_pat;
7845         int i, pat_len;
7846
7847         if (!wowlan->n_patterns)
7848                 return 0;
7849
7850         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7851         if (!nl_pats)
7852                 return -ENOBUFS;
7853
7854         for (i = 0; i < wowlan->n_patterns; i++) {
7855                 nl_pat = nla_nest_start(msg, i + 1);
7856                 if (!nl_pat)
7857                         return -ENOBUFS;
7858                 pat_len = wowlan->patterns[i].pattern_len;
7859                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
7860                             wowlan->patterns[i].mask) ||
7861                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
7862                             wowlan->patterns[i].pattern) ||
7863                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
7864                                 wowlan->patterns[i].pkt_offset))
7865                         return -ENOBUFS;
7866                 nla_nest_end(msg, nl_pat);
7867         }
7868         nla_nest_end(msg, nl_pats);
7869
7870         return 0;
7871 }
7872
7873 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7874                                    struct cfg80211_wowlan_tcp *tcp)
7875 {
7876         struct nlattr *nl_tcp;
7877
7878         if (!tcp)
7879                 return 0;
7880
7881         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7882         if (!nl_tcp)
7883                 return -ENOBUFS;
7884
7885         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7886             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7887             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7888             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7889             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7890             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7891                     tcp->payload_len, tcp->payload) ||
7892             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7893                         tcp->data_interval) ||
7894             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7895                     tcp->wake_len, tcp->wake_data) ||
7896             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7897                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7898                 return -ENOBUFS;
7899
7900         if (tcp->payload_seq.len &&
7901             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7902                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7903                 return -ENOBUFS;
7904
7905         if (tcp->payload_tok.len &&
7906             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7907                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7908                     &tcp->payload_tok))
7909                 return -ENOBUFS;
7910
7911         nla_nest_end(msg, nl_tcp);
7912
7913         return 0;
7914 }
7915
7916 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7917 {
7918         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7919         struct sk_buff *msg;
7920         void *hdr;
7921         u32 size = NLMSG_DEFAULT_SIZE;
7922
7923         if (!rdev->wiphy.wowlan)
7924                 return -EOPNOTSUPP;
7925
7926         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
7927                 /* adjust size to have room for all the data */
7928                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
7929                         rdev->wiphy.wowlan_config->tcp->payload_len +
7930                         rdev->wiphy.wowlan_config->tcp->wake_len +
7931                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
7932         }
7933
7934         msg = nlmsg_new(size, GFP_KERNEL);
7935         if (!msg)
7936                 return -ENOMEM;
7937
7938         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7939                              NL80211_CMD_GET_WOWLAN);
7940         if (!hdr)
7941                 goto nla_put_failure;
7942
7943         if (rdev->wiphy.wowlan_config) {
7944                 struct nlattr *nl_wowlan;
7945
7946                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7947                 if (!nl_wowlan)
7948                         goto nla_put_failure;
7949
7950                 if ((rdev->wiphy.wowlan_config->any &&
7951                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7952                     (rdev->wiphy.wowlan_config->disconnect &&
7953                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7954                     (rdev->wiphy.wowlan_config->magic_pkt &&
7955                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7956                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
7957                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7958                     (rdev->wiphy.wowlan_config->eap_identity_req &&
7959                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7960                     (rdev->wiphy.wowlan_config->four_way_handshake &&
7961                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7962                     (rdev->wiphy.wowlan_config->rfkill_release &&
7963                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7964                         goto nla_put_failure;
7965
7966                 if (nl80211_send_wowlan_patterns(msg, rdev))
7967                         goto nla_put_failure;
7968
7969                 if (nl80211_send_wowlan_tcp(msg,
7970                                             rdev->wiphy.wowlan_config->tcp))
7971                         goto nla_put_failure;
7972
7973                 nla_nest_end(msg, nl_wowlan);
7974         }
7975
7976         genlmsg_end(msg, hdr);
7977         return genlmsg_reply(msg, info);
7978
7979 nla_put_failure:
7980         nlmsg_free(msg);
7981         return -ENOBUFS;
7982 }
7983
7984 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7985                                     struct nlattr *attr,
7986                                     struct cfg80211_wowlan *trig)
7987 {
7988         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7989         struct cfg80211_wowlan_tcp *cfg;
7990         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7991         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7992         u32 size;
7993         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7994         int err, port;
7995
7996         if (!rdev->wiphy.wowlan->tcp)
7997                 return -EINVAL;
7998
7999         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
8000                         nla_data(attr), nla_len(attr),
8001                         nl80211_wowlan_tcp_policy);
8002         if (err)
8003                 return err;
8004
8005         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
8006             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
8007             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
8008             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
8009             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
8010             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
8011             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
8012             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
8013                 return -EINVAL;
8014
8015         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
8016         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
8017                 return -EINVAL;
8018
8019         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
8020                         rdev->wiphy.wowlan->tcp->data_interval_max ||
8021             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
8022                 return -EINVAL;
8023
8024         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
8025         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
8026                 return -EINVAL;
8027
8028         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
8029         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
8030                 return -EINVAL;
8031
8032         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
8033                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8034
8035                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
8036                 tokens_size = tokln - sizeof(*tok);
8037
8038                 if (!tok->len || tokens_size % tok->len)
8039                         return -EINVAL;
8040                 if (!rdev->wiphy.wowlan->tcp->tok)
8041                         return -EINVAL;
8042                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
8043                         return -EINVAL;
8044                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
8045                         return -EINVAL;
8046                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
8047                         return -EINVAL;
8048                 if (tok->offset + tok->len > data_size)
8049                         return -EINVAL;
8050         }
8051
8052         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
8053                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
8054                 if (!rdev->wiphy.wowlan->tcp->seq)
8055                         return -EINVAL;
8056                 if (seq->len == 0 || seq->len > 4)
8057                         return -EINVAL;
8058                 if (seq->len + seq->offset > data_size)
8059                         return -EINVAL;
8060         }
8061
8062         size = sizeof(*cfg);
8063         size += data_size;
8064         size += wake_size + wake_mask_size;
8065         size += tokens_size;
8066
8067         cfg = kzalloc(size, GFP_KERNEL);
8068         if (!cfg)
8069                 return -ENOMEM;
8070         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
8071         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
8072         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
8073                ETH_ALEN);
8074         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
8075                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
8076         else
8077                 port = 0;
8078 #ifdef CONFIG_INET
8079         /* allocate a socket and port for it and use it */
8080         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
8081                             IPPROTO_TCP, &cfg->sock, 1);
8082         if (err) {
8083                 kfree(cfg);
8084                 return err;
8085         }
8086         if (inet_csk_get_port(cfg->sock->sk, port)) {
8087                 sock_release(cfg->sock);
8088                 kfree(cfg);
8089                 return -EADDRINUSE;
8090         }
8091         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
8092 #else
8093         if (!port) {
8094                 kfree(cfg);
8095                 return -EINVAL;
8096         }
8097         cfg->src_port = port;
8098 #endif
8099
8100         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
8101         cfg->payload_len = data_size;
8102         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
8103         memcpy((void *)cfg->payload,
8104                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
8105                data_size);
8106         if (seq)
8107                 cfg->payload_seq = *seq;
8108         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
8109         cfg->wake_len = wake_size;
8110         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
8111         memcpy((void *)cfg->wake_data,
8112                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
8113                wake_size);
8114         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
8115                          data_size + wake_size;
8116         memcpy((void *)cfg->wake_mask,
8117                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
8118                wake_mask_size);
8119         if (tok) {
8120                 cfg->tokens_size = tokens_size;
8121                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
8122         }
8123
8124         trig->tcp = cfg;
8125
8126         return 0;
8127 }
8128
8129 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
8130 {
8131         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8132         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
8133         struct cfg80211_wowlan new_triggers = {};
8134         struct cfg80211_wowlan *ntrig;
8135         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
8136         int err, i;
8137         bool prev_enabled = rdev->wiphy.wowlan_config;
8138
8139         if (!wowlan)
8140                 return -EOPNOTSUPP;
8141
8142         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
8143                 cfg80211_rdev_free_wowlan(rdev);
8144                 rdev->wiphy.wowlan_config = NULL;
8145                 goto set_wakeup;
8146         }
8147
8148         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
8149                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8150                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
8151                         nl80211_wowlan_policy);
8152         if (err)
8153                 return err;
8154
8155         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
8156                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
8157                         return -EINVAL;
8158                 new_triggers.any = true;
8159         }
8160
8161         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
8162                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
8163                         return -EINVAL;
8164                 new_triggers.disconnect = true;
8165         }
8166
8167         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
8168                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
8169                         return -EINVAL;
8170                 new_triggers.magic_pkt = true;
8171         }
8172
8173         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
8174                 return -EINVAL;
8175
8176         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
8177                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
8178                         return -EINVAL;
8179                 new_triggers.gtk_rekey_failure = true;
8180         }
8181
8182         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
8183                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
8184                         return -EINVAL;
8185                 new_triggers.eap_identity_req = true;
8186         }
8187
8188         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
8189                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
8190                         return -EINVAL;
8191                 new_triggers.four_way_handshake = true;
8192         }
8193
8194         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
8195                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
8196                         return -EINVAL;
8197                 new_triggers.rfkill_release = true;
8198         }
8199
8200         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
8201                 struct nlattr *pat;
8202                 int n_patterns = 0;
8203                 int rem, pat_len, mask_len, pkt_offset;
8204                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8205
8206                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8207                                     rem)
8208                         n_patterns++;
8209                 if (n_patterns > wowlan->n_patterns)
8210                         return -EINVAL;
8211
8212                 new_triggers.patterns = kcalloc(n_patterns,
8213                                                 sizeof(new_triggers.patterns[0]),
8214                                                 GFP_KERNEL);
8215                 if (!new_triggers.patterns)
8216                         return -ENOMEM;
8217
8218                 new_triggers.n_patterns = n_patterns;
8219                 i = 0;
8220
8221                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
8222                                     rem) {
8223                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8224                                   nla_len(pat), NULL);
8225                         err = -EINVAL;
8226                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
8227                             !pat_tb[NL80211_PKTPAT_PATTERN])
8228                                 goto error;
8229                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8230                         mask_len = DIV_ROUND_UP(pat_len, 8);
8231                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8232                                 goto error;
8233                         if (pat_len > wowlan->pattern_max_len ||
8234                             pat_len < wowlan->pattern_min_len)
8235                                 goto error;
8236
8237                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
8238                                 pkt_offset = 0;
8239                         else
8240                                 pkt_offset = nla_get_u32(
8241                                         pat_tb[NL80211_PKTPAT_OFFSET]);
8242                         if (pkt_offset > wowlan->max_pkt_offset)
8243                                 goto error;
8244                         new_triggers.patterns[i].pkt_offset = pkt_offset;
8245
8246                         new_triggers.patterns[i].mask =
8247                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
8248                         if (!new_triggers.patterns[i].mask) {
8249                                 err = -ENOMEM;
8250                                 goto error;
8251                         }
8252                         new_triggers.patterns[i].pattern =
8253                                 new_triggers.patterns[i].mask + mask_len;
8254                         memcpy(new_triggers.patterns[i].mask,
8255                                nla_data(pat_tb[NL80211_PKTPAT_MASK]),
8256                                mask_len);
8257                         new_triggers.patterns[i].pattern_len = pat_len;
8258                         memcpy(new_triggers.patterns[i].pattern,
8259                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
8260                                pat_len);
8261                         i++;
8262                 }
8263         }
8264
8265         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
8266                 err = nl80211_parse_wowlan_tcp(
8267                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
8268                         &new_triggers);
8269                 if (err)
8270                         goto error;
8271         }
8272
8273         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
8274         if (!ntrig) {
8275                 err = -ENOMEM;
8276                 goto error;
8277         }
8278         cfg80211_rdev_free_wowlan(rdev);
8279         rdev->wiphy.wowlan_config = ntrig;
8280
8281  set_wakeup:
8282         if (rdev->ops->set_wakeup &&
8283             prev_enabled != !!rdev->wiphy.wowlan_config)
8284                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
8285
8286         return 0;
8287  error:
8288         for (i = 0; i < new_triggers.n_patterns; i++)
8289                 kfree(new_triggers.patterns[i].mask);
8290         kfree(new_triggers.patterns);
8291         if (new_triggers.tcp && new_triggers.tcp->sock)
8292                 sock_release(new_triggers.tcp->sock);
8293         kfree(new_triggers.tcp);
8294         return err;
8295 }
8296 #endif
8297
8298 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
8299                                        struct cfg80211_registered_device *rdev)
8300 {
8301         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
8302         int i, j, pat_len;
8303         struct cfg80211_coalesce_rules *rule;
8304
8305         if (!rdev->coalesce->n_rules)
8306                 return 0;
8307
8308         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
8309         if (!nl_rules)
8310                 return -ENOBUFS;
8311
8312         for (i = 0; i < rdev->coalesce->n_rules; i++) {
8313                 nl_rule = nla_nest_start(msg, i + 1);
8314                 if (!nl_rule)
8315                         return -ENOBUFS;
8316
8317                 rule = &rdev->coalesce->rules[i];
8318                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
8319                                 rule->delay))
8320                         return -ENOBUFS;
8321
8322                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
8323                                 rule->condition))
8324                         return -ENOBUFS;
8325
8326                 nl_pats = nla_nest_start(msg,
8327                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
8328                 if (!nl_pats)
8329                         return -ENOBUFS;
8330
8331                 for (j = 0; j < rule->n_patterns; j++) {
8332                         nl_pat = nla_nest_start(msg, j + 1);
8333                         if (!nl_pat)
8334                                 return -ENOBUFS;
8335                         pat_len = rule->patterns[j].pattern_len;
8336                         if (nla_put(msg, NL80211_PKTPAT_MASK,
8337                                     DIV_ROUND_UP(pat_len, 8),
8338                                     rule->patterns[j].mask) ||
8339                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
8340                                     rule->patterns[j].pattern) ||
8341                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
8342                                         rule->patterns[j].pkt_offset))
8343                                 return -ENOBUFS;
8344                         nla_nest_end(msg, nl_pat);
8345                 }
8346                 nla_nest_end(msg, nl_pats);
8347                 nla_nest_end(msg, nl_rule);
8348         }
8349         nla_nest_end(msg, nl_rules);
8350
8351         return 0;
8352 }
8353
8354 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
8355 {
8356         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8357         struct sk_buff *msg;
8358         void *hdr;
8359
8360         if (!rdev->wiphy.coalesce)
8361                 return -EOPNOTSUPP;
8362
8363         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8364         if (!msg)
8365                 return -ENOMEM;
8366
8367         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8368                              NL80211_CMD_GET_COALESCE);
8369         if (!hdr)
8370                 goto nla_put_failure;
8371
8372         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
8373                 goto nla_put_failure;
8374
8375         genlmsg_end(msg, hdr);
8376         return genlmsg_reply(msg, info);
8377
8378 nla_put_failure:
8379         nlmsg_free(msg);
8380         return -ENOBUFS;
8381 }
8382
8383 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
8384 {
8385         struct cfg80211_coalesce *coalesce = rdev->coalesce;
8386         int i, j;
8387         struct cfg80211_coalesce_rules *rule;
8388
8389         if (!coalesce)
8390                 return;
8391
8392         for (i = 0; i < coalesce->n_rules; i++) {
8393                 rule = &coalesce->rules[i];
8394                 for (j = 0; j < rule->n_patterns; j++)
8395                         kfree(rule->patterns[j].mask);
8396                 kfree(rule->patterns);
8397         }
8398         kfree(coalesce->rules);
8399         kfree(coalesce);
8400         rdev->coalesce = NULL;
8401 }
8402
8403 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
8404                                        struct nlattr *rule,
8405                                        struct cfg80211_coalesce_rules *new_rule)
8406 {
8407         int err, i;
8408         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8409         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
8410         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
8411         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
8412
8413         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
8414                         nla_len(rule), nl80211_coalesce_policy);
8415         if (err)
8416                 return err;
8417
8418         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
8419                 new_rule->delay =
8420                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
8421         if (new_rule->delay > coalesce->max_delay)
8422                 return -EINVAL;
8423
8424         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
8425                 new_rule->condition =
8426                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
8427         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
8428             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
8429                 return -EINVAL;
8430
8431         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
8432                 return -EINVAL;
8433
8434         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8435                             rem)
8436                 n_patterns++;
8437         if (n_patterns > coalesce->n_patterns)
8438                 return -EINVAL;
8439
8440         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
8441                                      GFP_KERNEL);
8442         if (!new_rule->patterns)
8443                 return -ENOMEM;
8444
8445         new_rule->n_patterns = n_patterns;
8446         i = 0;
8447
8448         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
8449                             rem) {
8450                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
8451                           nla_len(pat), NULL);
8452                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
8453                     !pat_tb[NL80211_PKTPAT_PATTERN])
8454                         return -EINVAL;
8455                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
8456                 mask_len = DIV_ROUND_UP(pat_len, 8);
8457                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
8458                         return -EINVAL;
8459                 if (pat_len > coalesce->pattern_max_len ||
8460                     pat_len < coalesce->pattern_min_len)
8461                         return -EINVAL;
8462
8463                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
8464                         pkt_offset = 0;
8465                 else
8466                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
8467                 if (pkt_offset > coalesce->max_pkt_offset)
8468                         return -EINVAL;
8469                 new_rule->patterns[i].pkt_offset = pkt_offset;
8470
8471                 new_rule->patterns[i].mask =
8472                         kmalloc(mask_len + pat_len, GFP_KERNEL);
8473                 if (!new_rule->patterns[i].mask)
8474                         return -ENOMEM;
8475                 new_rule->patterns[i].pattern =
8476                         new_rule->patterns[i].mask + mask_len;
8477                 memcpy(new_rule->patterns[i].mask,
8478                        nla_data(pat_tb[NL80211_PKTPAT_MASK]), mask_len);
8479                 new_rule->patterns[i].pattern_len = pat_len;
8480                 memcpy(new_rule->patterns[i].pattern,
8481                        nla_data(pat_tb[NL80211_PKTPAT_PATTERN]), pat_len);
8482                 i++;
8483         }
8484
8485         return 0;
8486 }
8487
8488 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
8489 {
8490         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8491         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
8492         struct cfg80211_coalesce new_coalesce = {};
8493         struct cfg80211_coalesce *n_coalesce;
8494         int err, rem_rule, n_rules = 0, i, j;
8495         struct nlattr *rule;
8496         struct cfg80211_coalesce_rules *tmp_rule;
8497
8498         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
8499                 return -EOPNOTSUPP;
8500
8501         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
8502                 cfg80211_rdev_free_coalesce(rdev);
8503                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
8504                 return 0;
8505         }
8506
8507         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8508                             rem_rule)
8509                 n_rules++;
8510         if (n_rules > coalesce->n_rules)
8511                 return -EINVAL;
8512
8513         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
8514                                      GFP_KERNEL);
8515         if (!new_coalesce.rules)
8516                 return -ENOMEM;
8517
8518         new_coalesce.n_rules = n_rules;
8519         i = 0;
8520
8521         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
8522                             rem_rule) {
8523                 err = nl80211_parse_coalesce_rule(rdev, rule,
8524                                                   &new_coalesce.rules[i]);
8525                 if (err)
8526                         goto error;
8527
8528                 i++;
8529         }
8530
8531         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
8532         if (err)
8533                 goto error;
8534
8535         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
8536         if (!n_coalesce) {
8537                 err = -ENOMEM;
8538                 goto error;
8539         }
8540         cfg80211_rdev_free_coalesce(rdev);
8541         rdev->coalesce = n_coalesce;
8542
8543         return 0;
8544 error:
8545         for (i = 0; i < new_coalesce.n_rules; i++) {
8546                 tmp_rule = &new_coalesce.rules[i];
8547                 for (j = 0; j < tmp_rule->n_patterns; j++)
8548                         kfree(tmp_rule->patterns[j].mask);
8549                 kfree(tmp_rule->patterns);
8550         }
8551         kfree(new_coalesce.rules);
8552
8553         return err;
8554 }
8555
8556 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
8557 {
8558         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8559         struct net_device *dev = info->user_ptr[1];
8560         struct wireless_dev *wdev = dev->ieee80211_ptr;
8561         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
8562         struct cfg80211_gtk_rekey_data rekey_data;
8563         int err;
8564
8565         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
8566                 return -EINVAL;
8567
8568         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
8569                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
8570                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
8571                         nl80211_rekey_policy);
8572         if (err)
8573                 return err;
8574
8575         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
8576                 return -ERANGE;
8577         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
8578                 return -ERANGE;
8579         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
8580                 return -ERANGE;
8581
8582         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
8583                NL80211_KEK_LEN);
8584         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
8585                NL80211_KCK_LEN);
8586         memcpy(rekey_data.replay_ctr,
8587                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
8588                NL80211_REPLAY_CTR_LEN);
8589
8590         wdev_lock(wdev);
8591         if (!wdev->current_bss) {
8592                 err = -ENOTCONN;
8593                 goto out;
8594         }
8595
8596         if (!rdev->ops->set_rekey_data) {
8597                 err = -EOPNOTSUPP;
8598                 goto out;
8599         }
8600
8601         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
8602  out:
8603         wdev_unlock(wdev);
8604         return err;
8605 }
8606
8607 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
8608                                              struct genl_info *info)
8609 {
8610         struct net_device *dev = info->user_ptr[1];
8611         struct wireless_dev *wdev = dev->ieee80211_ptr;
8612
8613         if (wdev->iftype != NL80211_IFTYPE_AP &&
8614             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8615                 return -EINVAL;
8616
8617         if (wdev->ap_unexpected_nlportid)
8618                 return -EBUSY;
8619
8620         wdev->ap_unexpected_nlportid = info->snd_portid;
8621         return 0;
8622 }
8623
8624 static int nl80211_probe_client(struct sk_buff *skb,
8625                                 struct genl_info *info)
8626 {
8627         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8628         struct net_device *dev = info->user_ptr[1];
8629         struct wireless_dev *wdev = dev->ieee80211_ptr;
8630         struct sk_buff *msg;
8631         void *hdr;
8632         const u8 *addr;
8633         u64 cookie;
8634         int err;
8635
8636         if (wdev->iftype != NL80211_IFTYPE_AP &&
8637             wdev->iftype != NL80211_IFTYPE_P2P_GO)
8638                 return -EOPNOTSUPP;
8639
8640         if (!info->attrs[NL80211_ATTR_MAC])
8641                 return -EINVAL;
8642
8643         if (!rdev->ops->probe_client)
8644                 return -EOPNOTSUPP;
8645
8646         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8647         if (!msg)
8648                 return -ENOMEM;
8649
8650         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8651                              NL80211_CMD_PROBE_CLIENT);
8652         if (!hdr) {
8653                 err = -ENOBUFS;
8654                 goto free_msg;
8655         }
8656
8657         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
8658
8659         err = rdev_probe_client(rdev, dev, addr, &cookie);
8660         if (err)
8661                 goto free_msg;
8662
8663         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8664                 goto nla_put_failure;
8665
8666         genlmsg_end(msg, hdr);
8667
8668         return genlmsg_reply(msg, info);
8669
8670  nla_put_failure:
8671         err = -ENOBUFS;
8672  free_msg:
8673         nlmsg_free(msg);
8674         return err;
8675 }
8676
8677 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
8678 {
8679         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8680         struct cfg80211_beacon_registration *reg, *nreg;
8681         int rv;
8682
8683         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
8684                 return -EOPNOTSUPP;
8685
8686         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
8687         if (!nreg)
8688                 return -ENOMEM;
8689
8690         /* First, check if already registered. */
8691         spin_lock_bh(&rdev->beacon_registrations_lock);
8692         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
8693                 if (reg->nlportid == info->snd_portid) {
8694                         rv = -EALREADY;
8695                         goto out_err;
8696                 }
8697         }
8698         /* Add it to the list */
8699         nreg->nlportid = info->snd_portid;
8700         list_add(&nreg->list, &rdev->beacon_registrations);
8701
8702         spin_unlock_bh(&rdev->beacon_registrations_lock);
8703
8704         return 0;
8705 out_err:
8706         spin_unlock_bh(&rdev->beacon_registrations_lock);
8707         kfree(nreg);
8708         return rv;
8709 }
8710
8711 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8712 {
8713         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8714         struct wireless_dev *wdev = info->user_ptr[1];
8715         int err;
8716
8717         if (!rdev->ops->start_p2p_device)
8718                 return -EOPNOTSUPP;
8719
8720         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8721                 return -EOPNOTSUPP;
8722
8723         if (wdev->p2p_started)
8724                 return 0;
8725
8726         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8727         if (err)
8728                 return err;
8729
8730         err = rdev_start_p2p_device(rdev, wdev);
8731         if (err)
8732                 return err;
8733
8734         wdev->p2p_started = true;
8735         rdev->opencount++;
8736
8737         return 0;
8738 }
8739
8740 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8741 {
8742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8743         struct wireless_dev *wdev = info->user_ptr[1];
8744
8745         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8746                 return -EOPNOTSUPP;
8747
8748         if (!rdev->ops->stop_p2p_device)
8749                 return -EOPNOTSUPP;
8750
8751         cfg80211_stop_p2p_device(rdev, wdev);
8752
8753         return 0;
8754 }
8755
8756 static int nl80211_get_protocol_features(struct sk_buff *skb,
8757                                          struct genl_info *info)
8758 {
8759         void *hdr;
8760         struct sk_buff *msg;
8761
8762         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8763         if (!msg)
8764                 return -ENOMEM;
8765
8766         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8767                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8768         if (!hdr)
8769                 goto nla_put_failure;
8770
8771         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8772                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8773                 goto nla_put_failure;
8774
8775         genlmsg_end(msg, hdr);
8776         return genlmsg_reply(msg, info);
8777
8778  nla_put_failure:
8779         kfree_skb(msg);
8780         return -ENOBUFS;
8781 }
8782
8783 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
8784 {
8785         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8786         struct cfg80211_update_ft_ies_params ft_params;
8787         struct net_device *dev = info->user_ptr[1];
8788
8789         if (!rdev->ops->update_ft_ies)
8790                 return -EOPNOTSUPP;
8791
8792         if (!info->attrs[NL80211_ATTR_MDID] ||
8793             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8794                 return -EINVAL;
8795
8796         memset(&ft_params, 0, sizeof(ft_params));
8797         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
8798         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8799         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8800
8801         return rdev_update_ft_ies(rdev, dev, &ft_params);
8802 }
8803
8804 static int nl80211_crit_protocol_start(struct sk_buff *skb,
8805                                        struct genl_info *info)
8806 {
8807         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8808         struct wireless_dev *wdev = info->user_ptr[1];
8809         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
8810         u16 duration;
8811         int ret;
8812
8813         if (!rdev->ops->crit_proto_start)
8814                 return -EOPNOTSUPP;
8815
8816         if (WARN_ON(!rdev->ops->crit_proto_stop))
8817                 return -EINVAL;
8818
8819         if (rdev->crit_proto_nlportid)
8820                 return -EBUSY;
8821
8822         /* determine protocol if provided */
8823         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
8824                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
8825
8826         if (proto >= NUM_NL80211_CRIT_PROTO)
8827                 return -EINVAL;
8828
8829         /* timeout must be provided */
8830         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
8831                 return -EINVAL;
8832
8833         duration =
8834                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
8835
8836         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
8837                 return -ERANGE;
8838
8839         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
8840         if (!ret)
8841                 rdev->crit_proto_nlportid = info->snd_portid;
8842
8843         return ret;
8844 }
8845
8846 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
8847                                       struct genl_info *info)
8848 {
8849         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8850         struct wireless_dev *wdev = info->user_ptr[1];
8851
8852         if (!rdev->ops->crit_proto_stop)
8853                 return -EOPNOTSUPP;
8854
8855         if (rdev->crit_proto_nlportid) {
8856                 rdev->crit_proto_nlportid = 0;
8857                 rdev_crit_proto_stop(rdev, wdev);
8858         }
8859         return 0;
8860 }
8861
8862 #define NL80211_FLAG_NEED_WIPHY         0x01
8863 #define NL80211_FLAG_NEED_NETDEV        0x02
8864 #define NL80211_FLAG_NEED_RTNL          0x04
8865 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8866 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8867                                          NL80211_FLAG_CHECK_NETDEV_UP)
8868 #define NL80211_FLAG_NEED_WDEV          0x10
8869 /* If a netdev is associated, it must be UP, P2P must be started */
8870 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8871                                          NL80211_FLAG_CHECK_NETDEV_UP)
8872
8873 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
8874                             struct genl_info *info)
8875 {
8876         struct cfg80211_registered_device *rdev;
8877         struct wireless_dev *wdev;
8878         struct net_device *dev;
8879         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8880
8881         if (rtnl)
8882                 rtnl_lock();
8883
8884         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8885                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8886                 if (IS_ERR(rdev)) {
8887                         if (rtnl)
8888                                 rtnl_unlock();
8889                         return PTR_ERR(rdev);
8890                 }
8891                 info->user_ptr[0] = rdev;
8892         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8893                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8894                 ASSERT_RTNL();
8895
8896                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8897                                                   info->attrs);
8898                 if (IS_ERR(wdev)) {
8899                         if (rtnl)
8900                                 rtnl_unlock();
8901                         return PTR_ERR(wdev);
8902                 }
8903
8904                 dev = wdev->netdev;
8905                 rdev = wiphy_to_dev(wdev->wiphy);
8906
8907                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8908                         if (!dev) {
8909                                 if (rtnl)
8910                                         rtnl_unlock();
8911                                 return -EINVAL;
8912                         }
8913
8914                         info->user_ptr[1] = dev;
8915                 } else {
8916                         info->user_ptr[1] = wdev;
8917                 }
8918
8919                 if (dev) {
8920                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8921                             !netif_running(dev)) {
8922                                 if (rtnl)
8923                                         rtnl_unlock();
8924                                 return -ENETDOWN;
8925                         }
8926
8927                         dev_hold(dev);
8928                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8929                         if (!wdev->p2p_started) {
8930                                 if (rtnl)
8931                                         rtnl_unlock();
8932                                 return -ENETDOWN;
8933                         }
8934                 }
8935
8936                 info->user_ptr[0] = rdev;
8937         }
8938
8939         return 0;
8940 }
8941
8942 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
8943                               struct genl_info *info)
8944 {
8945         if (info->user_ptr[1]) {
8946                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8947                         struct wireless_dev *wdev = info->user_ptr[1];
8948
8949                         if (wdev->netdev)
8950                                 dev_put(wdev->netdev);
8951                 } else {
8952                         dev_put(info->user_ptr[1]);
8953                 }
8954         }
8955         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8956                 rtnl_unlock();
8957 }
8958
8959 static const struct genl_ops nl80211_ops[] = {
8960         {
8961                 .cmd = NL80211_CMD_GET_WIPHY,
8962                 .doit = nl80211_get_wiphy,
8963                 .dumpit = nl80211_dump_wiphy,
8964                 .done = nl80211_dump_wiphy_done,
8965                 .policy = nl80211_policy,
8966                 /* can be retrieved by unprivileged users */
8967                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8968                                   NL80211_FLAG_NEED_RTNL,
8969         },
8970         {
8971                 .cmd = NL80211_CMD_SET_WIPHY,
8972                 .doit = nl80211_set_wiphy,
8973                 .policy = nl80211_policy,
8974                 .flags = GENL_ADMIN_PERM,
8975                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8976         },
8977         {
8978                 .cmd = NL80211_CMD_GET_INTERFACE,
8979                 .doit = nl80211_get_interface,
8980                 .dumpit = nl80211_dump_interface,
8981                 .policy = nl80211_policy,
8982                 /* can be retrieved by unprivileged users */
8983                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8984                                   NL80211_FLAG_NEED_RTNL,
8985         },
8986         {
8987                 .cmd = NL80211_CMD_SET_INTERFACE,
8988                 .doit = nl80211_set_interface,
8989                 .policy = nl80211_policy,
8990                 .flags = GENL_ADMIN_PERM,
8991                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8992                                   NL80211_FLAG_NEED_RTNL,
8993         },
8994         {
8995                 .cmd = NL80211_CMD_NEW_INTERFACE,
8996                 .doit = nl80211_new_interface,
8997                 .policy = nl80211_policy,
8998                 .flags = GENL_ADMIN_PERM,
8999                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9000                                   NL80211_FLAG_NEED_RTNL,
9001         },
9002         {
9003                 .cmd = NL80211_CMD_DEL_INTERFACE,
9004                 .doit = nl80211_del_interface,
9005                 .policy = nl80211_policy,
9006                 .flags = GENL_ADMIN_PERM,
9007                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9008                                   NL80211_FLAG_NEED_RTNL,
9009         },
9010         {
9011                 .cmd = NL80211_CMD_GET_KEY,
9012                 .doit = nl80211_get_key,
9013                 .policy = nl80211_policy,
9014                 .flags = GENL_ADMIN_PERM,
9015                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9016                                   NL80211_FLAG_NEED_RTNL,
9017         },
9018         {
9019                 .cmd = NL80211_CMD_SET_KEY,
9020                 .doit = nl80211_set_key,
9021                 .policy = nl80211_policy,
9022                 .flags = GENL_ADMIN_PERM,
9023                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9024                                   NL80211_FLAG_NEED_RTNL,
9025         },
9026         {
9027                 .cmd = NL80211_CMD_NEW_KEY,
9028                 .doit = nl80211_new_key,
9029                 .policy = nl80211_policy,
9030                 .flags = GENL_ADMIN_PERM,
9031                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9032                                   NL80211_FLAG_NEED_RTNL,
9033         },
9034         {
9035                 .cmd = NL80211_CMD_DEL_KEY,
9036                 .doit = nl80211_del_key,
9037                 .policy = nl80211_policy,
9038                 .flags = GENL_ADMIN_PERM,
9039                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9040                                   NL80211_FLAG_NEED_RTNL,
9041         },
9042         {
9043                 .cmd = NL80211_CMD_SET_BEACON,
9044                 .policy = nl80211_policy,
9045                 .flags = GENL_ADMIN_PERM,
9046                 .doit = nl80211_set_beacon,
9047                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9048                                   NL80211_FLAG_NEED_RTNL,
9049         },
9050         {
9051                 .cmd = NL80211_CMD_START_AP,
9052                 .policy = nl80211_policy,
9053                 .flags = GENL_ADMIN_PERM,
9054                 .doit = nl80211_start_ap,
9055                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9056                                   NL80211_FLAG_NEED_RTNL,
9057         },
9058         {
9059                 .cmd = NL80211_CMD_STOP_AP,
9060                 .policy = nl80211_policy,
9061                 .flags = GENL_ADMIN_PERM,
9062                 .doit = nl80211_stop_ap,
9063                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9064                                   NL80211_FLAG_NEED_RTNL,
9065         },
9066         {
9067                 .cmd = NL80211_CMD_GET_STATION,
9068                 .doit = nl80211_get_station,
9069                 .dumpit = nl80211_dump_station,
9070                 .policy = nl80211_policy,
9071                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9072                                   NL80211_FLAG_NEED_RTNL,
9073         },
9074         {
9075                 .cmd = NL80211_CMD_SET_STATION,
9076                 .doit = nl80211_set_station,
9077                 .policy = nl80211_policy,
9078                 .flags = GENL_ADMIN_PERM,
9079                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9080                                   NL80211_FLAG_NEED_RTNL,
9081         },
9082         {
9083                 .cmd = NL80211_CMD_NEW_STATION,
9084                 .doit = nl80211_new_station,
9085                 .policy = nl80211_policy,
9086                 .flags = GENL_ADMIN_PERM,
9087                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9088                                   NL80211_FLAG_NEED_RTNL,
9089         },
9090         {
9091                 .cmd = NL80211_CMD_DEL_STATION,
9092                 .doit = nl80211_del_station,
9093                 .policy = nl80211_policy,
9094                 .flags = GENL_ADMIN_PERM,
9095                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9096                                   NL80211_FLAG_NEED_RTNL,
9097         },
9098         {
9099                 .cmd = NL80211_CMD_GET_MPATH,
9100                 .doit = nl80211_get_mpath,
9101                 .dumpit = nl80211_dump_mpath,
9102                 .policy = nl80211_policy,
9103                 .flags = GENL_ADMIN_PERM,
9104                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9105                                   NL80211_FLAG_NEED_RTNL,
9106         },
9107         {
9108                 .cmd = NL80211_CMD_SET_MPATH,
9109                 .doit = nl80211_set_mpath,
9110                 .policy = nl80211_policy,
9111                 .flags = GENL_ADMIN_PERM,
9112                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9113                                   NL80211_FLAG_NEED_RTNL,
9114         },
9115         {
9116                 .cmd = NL80211_CMD_NEW_MPATH,
9117                 .doit = nl80211_new_mpath,
9118                 .policy = nl80211_policy,
9119                 .flags = GENL_ADMIN_PERM,
9120                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9121                                   NL80211_FLAG_NEED_RTNL,
9122         },
9123         {
9124                 .cmd = NL80211_CMD_DEL_MPATH,
9125                 .doit = nl80211_del_mpath,
9126                 .policy = nl80211_policy,
9127                 .flags = GENL_ADMIN_PERM,
9128                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9129                                   NL80211_FLAG_NEED_RTNL,
9130         },
9131         {
9132                 .cmd = NL80211_CMD_SET_BSS,
9133                 .doit = nl80211_set_bss,
9134                 .policy = nl80211_policy,
9135                 .flags = GENL_ADMIN_PERM,
9136                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9137                                   NL80211_FLAG_NEED_RTNL,
9138         },
9139         {
9140                 .cmd = NL80211_CMD_GET_REG,
9141                 .doit = nl80211_get_reg,
9142                 .policy = nl80211_policy,
9143                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9144                 /* can be retrieved by unprivileged users */
9145         },
9146         {
9147                 .cmd = NL80211_CMD_SET_REG,
9148                 .doit = nl80211_set_reg,
9149                 .policy = nl80211_policy,
9150                 .flags = GENL_ADMIN_PERM,
9151                 .internal_flags = NL80211_FLAG_NEED_RTNL,
9152         },
9153         {
9154                 .cmd = NL80211_CMD_REQ_SET_REG,
9155                 .doit = nl80211_req_set_reg,
9156                 .policy = nl80211_policy,
9157                 .flags = GENL_ADMIN_PERM,
9158         },
9159         {
9160                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
9161                 .doit = nl80211_get_mesh_config,
9162                 .policy = nl80211_policy,
9163                 /* can be retrieved by unprivileged users */
9164                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9165                                   NL80211_FLAG_NEED_RTNL,
9166         },
9167         {
9168                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
9169                 .doit = nl80211_update_mesh_config,
9170                 .policy = nl80211_policy,
9171                 .flags = GENL_ADMIN_PERM,
9172                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9173                                   NL80211_FLAG_NEED_RTNL,
9174         },
9175         {
9176                 .cmd = NL80211_CMD_TRIGGER_SCAN,
9177                 .doit = nl80211_trigger_scan,
9178                 .policy = nl80211_policy,
9179                 .flags = GENL_ADMIN_PERM,
9180                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9181                                   NL80211_FLAG_NEED_RTNL,
9182         },
9183         {
9184                 .cmd = NL80211_CMD_GET_SCAN,
9185                 .policy = nl80211_policy,
9186                 .dumpit = nl80211_dump_scan,
9187         },
9188         {
9189                 .cmd = NL80211_CMD_START_SCHED_SCAN,
9190                 .doit = nl80211_start_sched_scan,
9191                 .policy = nl80211_policy,
9192                 .flags = GENL_ADMIN_PERM,
9193                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9194                                   NL80211_FLAG_NEED_RTNL,
9195         },
9196         {
9197                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
9198                 .doit = nl80211_stop_sched_scan,
9199                 .policy = nl80211_policy,
9200                 .flags = GENL_ADMIN_PERM,
9201                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9202                                   NL80211_FLAG_NEED_RTNL,
9203         },
9204         {
9205                 .cmd = NL80211_CMD_AUTHENTICATE,
9206                 .doit = nl80211_authenticate,
9207                 .policy = nl80211_policy,
9208                 .flags = GENL_ADMIN_PERM,
9209                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9210                                   NL80211_FLAG_NEED_RTNL,
9211         },
9212         {
9213                 .cmd = NL80211_CMD_ASSOCIATE,
9214                 .doit = nl80211_associate,
9215                 .policy = nl80211_policy,
9216                 .flags = GENL_ADMIN_PERM,
9217                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9218                                   NL80211_FLAG_NEED_RTNL,
9219         },
9220         {
9221                 .cmd = NL80211_CMD_DEAUTHENTICATE,
9222                 .doit = nl80211_deauthenticate,
9223                 .policy = nl80211_policy,
9224                 .flags = GENL_ADMIN_PERM,
9225                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9226                                   NL80211_FLAG_NEED_RTNL,
9227         },
9228         {
9229                 .cmd = NL80211_CMD_DISASSOCIATE,
9230                 .doit = nl80211_disassociate,
9231                 .policy = nl80211_policy,
9232                 .flags = GENL_ADMIN_PERM,
9233                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9234                                   NL80211_FLAG_NEED_RTNL,
9235         },
9236         {
9237                 .cmd = NL80211_CMD_JOIN_IBSS,
9238                 .doit = nl80211_join_ibss,
9239                 .policy = nl80211_policy,
9240                 .flags = GENL_ADMIN_PERM,
9241                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9242                                   NL80211_FLAG_NEED_RTNL,
9243         },
9244         {
9245                 .cmd = NL80211_CMD_LEAVE_IBSS,
9246                 .doit = nl80211_leave_ibss,
9247                 .policy = nl80211_policy,
9248                 .flags = GENL_ADMIN_PERM,
9249                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9250                                   NL80211_FLAG_NEED_RTNL,
9251         },
9252 #ifdef CONFIG_NL80211_TESTMODE
9253         {
9254                 .cmd = NL80211_CMD_TESTMODE,
9255                 .doit = nl80211_testmode_do,
9256                 .dumpit = nl80211_testmode_dump,
9257                 .policy = nl80211_policy,
9258                 .flags = GENL_ADMIN_PERM,
9259                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9260                                   NL80211_FLAG_NEED_RTNL,
9261         },
9262 #endif
9263         {
9264                 .cmd = NL80211_CMD_CONNECT,
9265                 .doit = nl80211_connect,
9266                 .policy = nl80211_policy,
9267                 .flags = GENL_ADMIN_PERM,
9268                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9269                                   NL80211_FLAG_NEED_RTNL,
9270         },
9271         {
9272                 .cmd = NL80211_CMD_DISCONNECT,
9273                 .doit = nl80211_disconnect,
9274                 .policy = nl80211_policy,
9275                 .flags = GENL_ADMIN_PERM,
9276                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9277                                   NL80211_FLAG_NEED_RTNL,
9278         },
9279         {
9280                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
9281                 .doit = nl80211_wiphy_netns,
9282                 .policy = nl80211_policy,
9283                 .flags = GENL_ADMIN_PERM,
9284                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9285                                   NL80211_FLAG_NEED_RTNL,
9286         },
9287         {
9288                 .cmd = NL80211_CMD_GET_SURVEY,
9289                 .policy = nl80211_policy,
9290                 .dumpit = nl80211_dump_survey,
9291         },
9292         {
9293                 .cmd = NL80211_CMD_SET_PMKSA,
9294                 .doit = nl80211_setdel_pmksa,
9295                 .policy = nl80211_policy,
9296                 .flags = GENL_ADMIN_PERM,
9297                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9298                                   NL80211_FLAG_NEED_RTNL,
9299         },
9300         {
9301                 .cmd = NL80211_CMD_DEL_PMKSA,
9302                 .doit = nl80211_setdel_pmksa,
9303                 .policy = nl80211_policy,
9304                 .flags = GENL_ADMIN_PERM,
9305                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9306                                   NL80211_FLAG_NEED_RTNL,
9307         },
9308         {
9309                 .cmd = NL80211_CMD_FLUSH_PMKSA,
9310                 .doit = nl80211_flush_pmksa,
9311                 .policy = nl80211_policy,
9312                 .flags = GENL_ADMIN_PERM,
9313                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9314                                   NL80211_FLAG_NEED_RTNL,
9315         },
9316         {
9317                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
9318                 .doit = nl80211_remain_on_channel,
9319                 .policy = nl80211_policy,
9320                 .flags = GENL_ADMIN_PERM,
9321                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9322                                   NL80211_FLAG_NEED_RTNL,
9323         },
9324         {
9325                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9326                 .doit = nl80211_cancel_remain_on_channel,
9327                 .policy = nl80211_policy,
9328                 .flags = GENL_ADMIN_PERM,
9329                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9330                                   NL80211_FLAG_NEED_RTNL,
9331         },
9332         {
9333                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
9334                 .doit = nl80211_set_tx_bitrate_mask,
9335                 .policy = nl80211_policy,
9336                 .flags = GENL_ADMIN_PERM,
9337                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9338                                   NL80211_FLAG_NEED_RTNL,
9339         },
9340         {
9341                 .cmd = NL80211_CMD_REGISTER_FRAME,
9342                 .doit = nl80211_register_mgmt,
9343                 .policy = nl80211_policy,
9344                 .flags = GENL_ADMIN_PERM,
9345                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9346                                   NL80211_FLAG_NEED_RTNL,
9347         },
9348         {
9349                 .cmd = NL80211_CMD_FRAME,
9350                 .doit = nl80211_tx_mgmt,
9351                 .policy = nl80211_policy,
9352                 .flags = GENL_ADMIN_PERM,
9353                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9354                                   NL80211_FLAG_NEED_RTNL,
9355         },
9356         {
9357                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
9358                 .doit = nl80211_tx_mgmt_cancel_wait,
9359                 .policy = nl80211_policy,
9360                 .flags = GENL_ADMIN_PERM,
9361                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9362                                   NL80211_FLAG_NEED_RTNL,
9363         },
9364         {
9365                 .cmd = NL80211_CMD_SET_POWER_SAVE,
9366                 .doit = nl80211_set_power_save,
9367                 .policy = nl80211_policy,
9368                 .flags = GENL_ADMIN_PERM,
9369                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9370                                   NL80211_FLAG_NEED_RTNL,
9371         },
9372         {
9373                 .cmd = NL80211_CMD_GET_POWER_SAVE,
9374                 .doit = nl80211_get_power_save,
9375                 .policy = nl80211_policy,
9376                 /* can be retrieved by unprivileged users */
9377                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9378                                   NL80211_FLAG_NEED_RTNL,
9379         },
9380         {
9381                 .cmd = NL80211_CMD_SET_CQM,
9382                 .doit = nl80211_set_cqm,
9383                 .policy = nl80211_policy,
9384                 .flags = GENL_ADMIN_PERM,
9385                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9386                                   NL80211_FLAG_NEED_RTNL,
9387         },
9388         {
9389                 .cmd = NL80211_CMD_SET_CHANNEL,
9390                 .doit = nl80211_set_channel,
9391                 .policy = nl80211_policy,
9392                 .flags = GENL_ADMIN_PERM,
9393                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9394                                   NL80211_FLAG_NEED_RTNL,
9395         },
9396         {
9397                 .cmd = NL80211_CMD_SET_WDS_PEER,
9398                 .doit = nl80211_set_wds_peer,
9399                 .policy = nl80211_policy,
9400                 .flags = GENL_ADMIN_PERM,
9401                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9402                                   NL80211_FLAG_NEED_RTNL,
9403         },
9404         {
9405                 .cmd = NL80211_CMD_JOIN_MESH,
9406                 .doit = nl80211_join_mesh,
9407                 .policy = nl80211_policy,
9408                 .flags = GENL_ADMIN_PERM,
9409                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9410                                   NL80211_FLAG_NEED_RTNL,
9411         },
9412         {
9413                 .cmd = NL80211_CMD_LEAVE_MESH,
9414                 .doit = nl80211_leave_mesh,
9415                 .policy = nl80211_policy,
9416                 .flags = GENL_ADMIN_PERM,
9417                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9418                                   NL80211_FLAG_NEED_RTNL,
9419         },
9420 #ifdef CONFIG_PM
9421         {
9422                 .cmd = NL80211_CMD_GET_WOWLAN,
9423                 .doit = nl80211_get_wowlan,
9424                 .policy = nl80211_policy,
9425                 /* can be retrieved by unprivileged users */
9426                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9427                                   NL80211_FLAG_NEED_RTNL,
9428         },
9429         {
9430                 .cmd = NL80211_CMD_SET_WOWLAN,
9431                 .doit = nl80211_set_wowlan,
9432                 .policy = nl80211_policy,
9433                 .flags = GENL_ADMIN_PERM,
9434                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9435                                   NL80211_FLAG_NEED_RTNL,
9436         },
9437 #endif
9438         {
9439                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
9440                 .doit = nl80211_set_rekey_data,
9441                 .policy = nl80211_policy,
9442                 .flags = GENL_ADMIN_PERM,
9443                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9444                                   NL80211_FLAG_NEED_RTNL,
9445         },
9446         {
9447                 .cmd = NL80211_CMD_TDLS_MGMT,
9448                 .doit = nl80211_tdls_mgmt,
9449                 .policy = nl80211_policy,
9450                 .flags = GENL_ADMIN_PERM,
9451                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9452                                   NL80211_FLAG_NEED_RTNL,
9453         },
9454         {
9455                 .cmd = NL80211_CMD_TDLS_OPER,
9456                 .doit = nl80211_tdls_oper,
9457                 .policy = nl80211_policy,
9458                 .flags = GENL_ADMIN_PERM,
9459                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9460                                   NL80211_FLAG_NEED_RTNL,
9461         },
9462         {
9463                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
9464                 .doit = nl80211_register_unexpected_frame,
9465                 .policy = nl80211_policy,
9466                 .flags = GENL_ADMIN_PERM,
9467                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9468                                   NL80211_FLAG_NEED_RTNL,
9469         },
9470         {
9471                 .cmd = NL80211_CMD_PROBE_CLIENT,
9472                 .doit = nl80211_probe_client,
9473                 .policy = nl80211_policy,
9474                 .flags = GENL_ADMIN_PERM,
9475                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9476                                   NL80211_FLAG_NEED_RTNL,
9477         },
9478         {
9479                 .cmd = NL80211_CMD_REGISTER_BEACONS,
9480                 .doit = nl80211_register_beacons,
9481                 .policy = nl80211_policy,
9482                 .flags = GENL_ADMIN_PERM,
9483                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9484                                   NL80211_FLAG_NEED_RTNL,
9485         },
9486         {
9487                 .cmd = NL80211_CMD_SET_NOACK_MAP,
9488                 .doit = nl80211_set_noack_map,
9489                 .policy = nl80211_policy,
9490                 .flags = GENL_ADMIN_PERM,
9491                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9492                                   NL80211_FLAG_NEED_RTNL,
9493         },
9494         {
9495                 .cmd = NL80211_CMD_START_P2P_DEVICE,
9496                 .doit = nl80211_start_p2p_device,
9497                 .policy = nl80211_policy,
9498                 .flags = GENL_ADMIN_PERM,
9499                 .internal_flags = NL80211_FLAG_NEED_WDEV |
9500                                   NL80211_FLAG_NEED_RTNL,
9501         },
9502         {
9503                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
9504                 .doit = nl80211_stop_p2p_device,
9505                 .policy = nl80211_policy,
9506                 .flags = GENL_ADMIN_PERM,
9507                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9508                                   NL80211_FLAG_NEED_RTNL,
9509         },
9510         {
9511                 .cmd = NL80211_CMD_SET_MCAST_RATE,
9512                 .doit = nl80211_set_mcast_rate,
9513                 .policy = nl80211_policy,
9514                 .flags = GENL_ADMIN_PERM,
9515                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9516                                   NL80211_FLAG_NEED_RTNL,
9517         },
9518         {
9519                 .cmd = NL80211_CMD_SET_MAC_ACL,
9520                 .doit = nl80211_set_mac_acl,
9521                 .policy = nl80211_policy,
9522                 .flags = GENL_ADMIN_PERM,
9523                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
9524                                   NL80211_FLAG_NEED_RTNL,
9525         },
9526         {
9527                 .cmd = NL80211_CMD_RADAR_DETECT,
9528                 .doit = nl80211_start_radar_detection,
9529                 .policy = nl80211_policy,
9530                 .flags = GENL_ADMIN_PERM,
9531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9532                                   NL80211_FLAG_NEED_RTNL,
9533         },
9534         {
9535                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
9536                 .doit = nl80211_get_protocol_features,
9537                 .policy = nl80211_policy,
9538         },
9539         {
9540                 .cmd = NL80211_CMD_UPDATE_FT_IES,
9541                 .doit = nl80211_update_ft_ies,
9542                 .policy = nl80211_policy,
9543                 .flags = GENL_ADMIN_PERM,
9544                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9545                                   NL80211_FLAG_NEED_RTNL,
9546         },
9547         {
9548                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
9549                 .doit = nl80211_crit_protocol_start,
9550                 .policy = nl80211_policy,
9551                 .flags = GENL_ADMIN_PERM,
9552                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9553                                   NL80211_FLAG_NEED_RTNL,
9554         },
9555         {
9556                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
9557                 .doit = nl80211_crit_protocol_stop,
9558                 .policy = nl80211_policy,
9559                 .flags = GENL_ADMIN_PERM,
9560                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
9561                                   NL80211_FLAG_NEED_RTNL,
9562         },
9563         {
9564                 .cmd = NL80211_CMD_GET_COALESCE,
9565                 .doit = nl80211_get_coalesce,
9566                 .policy = nl80211_policy,
9567                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9568                                   NL80211_FLAG_NEED_RTNL,
9569         },
9570         {
9571                 .cmd = NL80211_CMD_SET_COALESCE,
9572                 .doit = nl80211_set_coalesce,
9573                 .policy = nl80211_policy,
9574                 .flags = GENL_ADMIN_PERM,
9575                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
9576                                   NL80211_FLAG_NEED_RTNL,
9577         },
9578         {
9579                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
9580                 .doit = nl80211_channel_switch,
9581                 .policy = nl80211_policy,
9582                 .flags = GENL_ADMIN_PERM,
9583                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
9584                                   NL80211_FLAG_NEED_RTNL,
9585         },
9586 };
9587
9588 /* notification functions */
9589
9590 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
9591 {
9592         struct sk_buff *msg;
9593         struct nl80211_dump_wiphy_state state = {};
9594
9595         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9596         if (!msg)
9597                 return;
9598
9599         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0, &state) < 0) {
9600                 nlmsg_free(msg);
9601                 return;
9602         }
9603
9604         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9605                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
9606 }
9607
9608 static int nl80211_add_scan_req(struct sk_buff *msg,
9609                                 struct cfg80211_registered_device *rdev)
9610 {
9611         struct cfg80211_scan_request *req = rdev->scan_req;
9612         struct nlattr *nest;
9613         int i;
9614
9615         if (WARN_ON(!req))
9616                 return 0;
9617
9618         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
9619         if (!nest)
9620                 goto nla_put_failure;
9621         for (i = 0; i < req->n_ssids; i++) {
9622                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
9623                         goto nla_put_failure;
9624         }
9625         nla_nest_end(msg, nest);
9626
9627         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9628         if (!nest)
9629                 goto nla_put_failure;
9630         for (i = 0; i < req->n_channels; i++) {
9631                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9632                         goto nla_put_failure;
9633         }
9634         nla_nest_end(msg, nest);
9635
9636         if (req->ie &&
9637             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
9638                 goto nla_put_failure;
9639
9640         if (req->flags &&
9641             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
9642                 goto nla_put_failure;
9643
9644         return 0;
9645  nla_put_failure:
9646         return -ENOBUFS;
9647 }
9648
9649 static int nl80211_send_scan_msg(struct sk_buff *msg,
9650                                  struct cfg80211_registered_device *rdev,
9651                                  struct wireless_dev *wdev,
9652                                  u32 portid, u32 seq, int flags,
9653                                  u32 cmd)
9654 {
9655         void *hdr;
9656
9657         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9658         if (!hdr)
9659                 return -1;
9660
9661         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9662             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9663                                          wdev->netdev->ifindex)) ||
9664             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9665                 goto nla_put_failure;
9666
9667         /* ignore errors and send incomplete event anyway */
9668         nl80211_add_scan_req(msg, rdev);
9669
9670         return genlmsg_end(msg, hdr);
9671
9672  nla_put_failure:
9673         genlmsg_cancel(msg, hdr);
9674         return -EMSGSIZE;
9675 }
9676
9677 static int
9678 nl80211_send_sched_scan_msg(struct sk_buff *msg,
9679                             struct cfg80211_registered_device *rdev,
9680                             struct net_device *netdev,
9681                             u32 portid, u32 seq, int flags, u32 cmd)
9682 {
9683         void *hdr;
9684
9685         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
9686         if (!hdr)
9687                 return -1;
9688
9689         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9690             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9691                 goto nla_put_failure;
9692
9693         return genlmsg_end(msg, hdr);
9694
9695  nla_put_failure:
9696         genlmsg_cancel(msg, hdr);
9697         return -EMSGSIZE;
9698 }
9699
9700 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
9701                              struct wireless_dev *wdev)
9702 {
9703         struct sk_buff *msg;
9704
9705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9706         if (!msg)
9707                 return;
9708
9709         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9710                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
9711                 nlmsg_free(msg);
9712                 return;
9713         }
9714
9715         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9716                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9717 }
9718
9719 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
9720                             struct wireless_dev *wdev)
9721 {
9722         struct sk_buff *msg;
9723
9724         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9725         if (!msg)
9726                 return;
9727
9728         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9729                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
9730                 nlmsg_free(msg);
9731                 return;
9732         }
9733
9734         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9735                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9736 }
9737
9738 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
9739                                struct wireless_dev *wdev)
9740 {
9741         struct sk_buff *msg;
9742
9743         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9744         if (!msg)
9745                 return;
9746
9747         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
9748                                   NL80211_CMD_SCAN_ABORTED) < 0) {
9749                 nlmsg_free(msg);
9750                 return;
9751         }
9752
9753         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9754                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9755 }
9756
9757 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
9758                                      struct net_device *netdev)
9759 {
9760         struct sk_buff *msg;
9761
9762         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9763         if (!msg)
9764                 return;
9765
9766         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
9767                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
9768                 nlmsg_free(msg);
9769                 return;
9770         }
9771
9772         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9773                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9774 }
9775
9776 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
9777                              struct net_device *netdev, u32 cmd)
9778 {
9779         struct sk_buff *msg;
9780
9781         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9782         if (!msg)
9783                 return;
9784
9785         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
9786                 nlmsg_free(msg);
9787                 return;
9788         }
9789
9790         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9791                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
9792 }
9793
9794 /*
9795  * This can happen on global regulatory changes or device specific settings
9796  * based on custom world regulatory domains.
9797  */
9798 void nl80211_send_reg_change_event(struct regulatory_request *request)
9799 {
9800         struct sk_buff *msg;
9801         void *hdr;
9802
9803         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9804         if (!msg)
9805                 return;
9806
9807         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9808         if (!hdr) {
9809                 nlmsg_free(msg);
9810                 return;
9811         }
9812
9813         /* Userspace can always count this one always being set */
9814         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9815                 goto nla_put_failure;
9816
9817         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9818                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9819                                NL80211_REGDOM_TYPE_WORLD))
9820                         goto nla_put_failure;
9821         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9822                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9823                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9824                         goto nla_put_failure;
9825         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9826                    request->intersect) {
9827                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9828                                NL80211_REGDOM_TYPE_INTERSECTION))
9829                         goto nla_put_failure;
9830         } else {
9831                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9832                                NL80211_REGDOM_TYPE_COUNTRY) ||
9833                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9834                                    request->alpha2))
9835                         goto nla_put_failure;
9836         }
9837
9838         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9839             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9840                 goto nla_put_failure;
9841
9842         genlmsg_end(msg, hdr);
9843
9844         rcu_read_lock();
9845         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
9846                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
9847         rcu_read_unlock();
9848
9849         return;
9850
9851 nla_put_failure:
9852         genlmsg_cancel(msg, hdr);
9853         nlmsg_free(msg);
9854 }
9855
9856 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9857                                     struct net_device *netdev,
9858                                     const u8 *buf, size_t len,
9859                                     enum nl80211_commands cmd, gfp_t gfp)
9860 {
9861         struct sk_buff *msg;
9862         void *hdr;
9863
9864         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9865         if (!msg)
9866                 return;
9867
9868         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9869         if (!hdr) {
9870                 nlmsg_free(msg);
9871                 return;
9872         }
9873
9874         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9875             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9876             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9877                 goto nla_put_failure;
9878
9879         genlmsg_end(msg, hdr);
9880
9881         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9882                                 NL80211_MCGRP_MLME, gfp);
9883         return;
9884
9885  nla_put_failure:
9886         genlmsg_cancel(msg, hdr);
9887         nlmsg_free(msg);
9888 }
9889
9890 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9891                           struct net_device *netdev, const u8 *buf,
9892                           size_t len, gfp_t gfp)
9893 {
9894         nl80211_send_mlme_event(rdev, netdev, buf, len,
9895                                 NL80211_CMD_AUTHENTICATE, gfp);
9896 }
9897
9898 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9899                            struct net_device *netdev, const u8 *buf,
9900                            size_t len, gfp_t gfp)
9901 {
9902         nl80211_send_mlme_event(rdev, netdev, buf, len,
9903                                 NL80211_CMD_ASSOCIATE, gfp);
9904 }
9905
9906 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9907                          struct net_device *netdev, const u8 *buf,
9908                          size_t len, gfp_t gfp)
9909 {
9910         nl80211_send_mlme_event(rdev, netdev, buf, len,
9911                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9912 }
9913
9914 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9915                            struct net_device *netdev, const u8 *buf,
9916                            size_t len, gfp_t gfp)
9917 {
9918         nl80211_send_mlme_event(rdev, netdev, buf, len,
9919                                 NL80211_CMD_DISASSOCIATE, gfp);
9920 }
9921
9922 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
9923                                   size_t len)
9924 {
9925         struct wireless_dev *wdev = dev->ieee80211_ptr;
9926         struct wiphy *wiphy = wdev->wiphy;
9927         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9928         const struct ieee80211_mgmt *mgmt = (void *)buf;
9929         u32 cmd;
9930
9931         if (WARN_ON(len < 2))
9932                 return;
9933
9934         if (ieee80211_is_deauth(mgmt->frame_control))
9935                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
9936         else
9937                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
9938
9939         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
9940         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC);
9941 }
9942 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
9943
9944 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9945                                       struct net_device *netdev, int cmd,
9946                                       const u8 *addr, gfp_t gfp)
9947 {
9948         struct sk_buff *msg;
9949         void *hdr;
9950
9951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9952         if (!msg)
9953                 return;
9954
9955         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9956         if (!hdr) {
9957                 nlmsg_free(msg);
9958                 return;
9959         }
9960
9961         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9962             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9963             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9964             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9965                 goto nla_put_failure;
9966
9967         genlmsg_end(msg, hdr);
9968
9969         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
9970                                 NL80211_MCGRP_MLME, gfp);
9971         return;
9972
9973  nla_put_failure:
9974         genlmsg_cancel(msg, hdr);
9975         nlmsg_free(msg);
9976 }
9977
9978 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9979                                struct net_device *netdev, const u8 *addr,
9980                                gfp_t gfp)
9981 {
9982         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9983                                   addr, gfp);
9984 }
9985
9986 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9987                                 struct net_device *netdev, const u8 *addr,
9988                                 gfp_t gfp)
9989 {
9990         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9991                                   addr, gfp);
9992 }
9993
9994 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9995                                  struct net_device *netdev, const u8 *bssid,
9996                                  const u8 *req_ie, size_t req_ie_len,
9997                                  const u8 *resp_ie, size_t resp_ie_len,
9998                                  u16 status, gfp_t gfp)
9999 {
10000         struct sk_buff *msg;
10001         void *hdr;
10002
10003         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10004         if (!msg)
10005                 return;
10006
10007         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
10008         if (!hdr) {
10009                 nlmsg_free(msg);
10010                 return;
10011         }
10012
10013         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10014             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10015             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
10016             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
10017             (req_ie &&
10018              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10019             (resp_ie &&
10020              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10021                 goto nla_put_failure;
10022
10023         genlmsg_end(msg, hdr);
10024
10025         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10026                                 NL80211_MCGRP_MLME, gfp);
10027         return;
10028
10029  nla_put_failure:
10030         genlmsg_cancel(msg, hdr);
10031         nlmsg_free(msg);
10032
10033 }
10034
10035 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
10036                          struct net_device *netdev, const u8 *bssid,
10037                          const u8 *req_ie, size_t req_ie_len,
10038                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
10039 {
10040         struct sk_buff *msg;
10041         void *hdr;
10042
10043         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10044         if (!msg)
10045                 return;
10046
10047         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
10048         if (!hdr) {
10049                 nlmsg_free(msg);
10050                 return;
10051         }
10052
10053         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10054             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10055             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
10056             (req_ie &&
10057              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
10058             (resp_ie &&
10059              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
10060                 goto nla_put_failure;
10061
10062         genlmsg_end(msg, hdr);
10063
10064         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10065                                 NL80211_MCGRP_MLME, gfp);
10066         return;
10067
10068  nla_put_failure:
10069         genlmsg_cancel(msg, hdr);
10070         nlmsg_free(msg);
10071
10072 }
10073
10074 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
10075                                struct net_device *netdev, u16 reason,
10076                                const u8 *ie, size_t ie_len, bool from_ap)
10077 {
10078         struct sk_buff *msg;
10079         void *hdr;
10080
10081         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10082         if (!msg)
10083                 return;
10084
10085         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
10086         if (!hdr) {
10087                 nlmsg_free(msg);
10088                 return;
10089         }
10090
10091         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10092             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10093             (from_ap && reason &&
10094              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
10095             (from_ap &&
10096              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
10097             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
10098                 goto nla_put_failure;
10099
10100         genlmsg_end(msg, hdr);
10101
10102         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10103                                 NL80211_MCGRP_MLME, GFP_KERNEL);
10104         return;
10105
10106  nla_put_failure:
10107         genlmsg_cancel(msg, hdr);
10108         nlmsg_free(msg);
10109
10110 }
10111
10112 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
10113                              struct net_device *netdev, const u8 *bssid,
10114                              gfp_t gfp)
10115 {
10116         struct sk_buff *msg;
10117         void *hdr;
10118
10119         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10120         if (!msg)
10121                 return;
10122
10123         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
10124         if (!hdr) {
10125                 nlmsg_free(msg);
10126                 return;
10127         }
10128
10129         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10130             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10131             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10132                 goto nla_put_failure;
10133
10134         genlmsg_end(msg, hdr);
10135
10136         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10137                                 NL80211_MCGRP_MLME, gfp);
10138         return;
10139
10140  nla_put_failure:
10141         genlmsg_cancel(msg, hdr);
10142         nlmsg_free(msg);
10143 }
10144
10145 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
10146                                         const u8* ie, u8 ie_len, gfp_t gfp)
10147 {
10148         struct wireless_dev *wdev = dev->ieee80211_ptr;
10149         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10150         struct sk_buff *msg;
10151         void *hdr;
10152
10153         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10154                 return;
10155
10156         trace_cfg80211_notify_new_peer_candidate(dev, addr);
10157
10158         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10159         if (!msg)
10160                 return;
10161
10162         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
10163         if (!hdr) {
10164                 nlmsg_free(msg);
10165                 return;
10166         }
10167
10168         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10169             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10170             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10171             (ie_len && ie &&
10172              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
10173                 goto nla_put_failure;
10174
10175         genlmsg_end(msg, hdr);
10176
10177         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10178                                 NL80211_MCGRP_MLME, gfp);
10179         return;
10180
10181  nla_put_failure:
10182         genlmsg_cancel(msg, hdr);
10183         nlmsg_free(msg);
10184 }
10185 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
10186
10187 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
10188                                  struct net_device *netdev, const u8 *addr,
10189                                  enum nl80211_key_type key_type, int key_id,
10190                                  const u8 *tsc, gfp_t gfp)
10191 {
10192         struct sk_buff *msg;
10193         void *hdr;
10194
10195         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10196         if (!msg)
10197                 return;
10198
10199         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
10200         if (!hdr) {
10201                 nlmsg_free(msg);
10202                 return;
10203         }
10204
10205         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10206             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10207             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
10208             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
10209             (key_id != -1 &&
10210              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
10211             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
10212                 goto nla_put_failure;
10213
10214         genlmsg_end(msg, hdr);
10215
10216         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10217                                 NL80211_MCGRP_MLME, gfp);
10218         return;
10219
10220  nla_put_failure:
10221         genlmsg_cancel(msg, hdr);
10222         nlmsg_free(msg);
10223 }
10224
10225 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
10226                                     struct ieee80211_channel *channel_before,
10227                                     struct ieee80211_channel *channel_after)
10228 {
10229         struct sk_buff *msg;
10230         void *hdr;
10231         struct nlattr *nl_freq;
10232
10233         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
10234         if (!msg)
10235                 return;
10236
10237         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
10238         if (!hdr) {
10239                 nlmsg_free(msg);
10240                 return;
10241         }
10242
10243         /*
10244          * Since we are applying the beacon hint to a wiphy we know its
10245          * wiphy_idx is valid
10246          */
10247         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
10248                 goto nla_put_failure;
10249
10250         /* Before */
10251         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
10252         if (!nl_freq)
10253                 goto nla_put_failure;
10254         if (nl80211_msg_put_channel(msg, channel_before, false))
10255                 goto nla_put_failure;
10256         nla_nest_end(msg, nl_freq);
10257
10258         /* After */
10259         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
10260         if (!nl_freq)
10261                 goto nla_put_failure;
10262         if (nl80211_msg_put_channel(msg, channel_after, false))
10263                 goto nla_put_failure;
10264         nla_nest_end(msg, nl_freq);
10265
10266         genlmsg_end(msg, hdr);
10267
10268         rcu_read_lock();
10269         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
10270                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
10271         rcu_read_unlock();
10272
10273         return;
10274
10275 nla_put_failure:
10276         genlmsg_cancel(msg, hdr);
10277         nlmsg_free(msg);
10278 }
10279
10280 static void nl80211_send_remain_on_chan_event(
10281         int cmd, struct cfg80211_registered_device *rdev,
10282         struct wireless_dev *wdev, u64 cookie,
10283         struct ieee80211_channel *chan,
10284         unsigned int duration, gfp_t gfp)
10285 {
10286         struct sk_buff *msg;
10287         void *hdr;
10288
10289         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10290         if (!msg)
10291                 return;
10292
10293         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10294         if (!hdr) {
10295                 nlmsg_free(msg);
10296                 return;
10297         }
10298
10299         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10300             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10301                                          wdev->netdev->ifindex)) ||
10302             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10303             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
10304             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
10305                         NL80211_CHAN_NO_HT) ||
10306             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
10307                 goto nla_put_failure;
10308
10309         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
10310             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
10311                 goto nla_put_failure;
10312
10313         genlmsg_end(msg, hdr);
10314
10315         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10316                                 NL80211_MCGRP_MLME, gfp);
10317         return;
10318
10319  nla_put_failure:
10320         genlmsg_cancel(msg, hdr);
10321         nlmsg_free(msg);
10322 }
10323
10324 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
10325                                struct ieee80211_channel *chan,
10326                                unsigned int duration, gfp_t gfp)
10327 {
10328         struct wiphy *wiphy = wdev->wiphy;
10329         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10330
10331         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
10332         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
10333                                           rdev, wdev, cookie, chan,
10334                                           duration, gfp);
10335 }
10336 EXPORT_SYMBOL(cfg80211_ready_on_channel);
10337
10338 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
10339                                         struct ieee80211_channel *chan,
10340                                         gfp_t gfp)
10341 {
10342         struct wiphy *wiphy = wdev->wiphy;
10343         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10344
10345         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
10346         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
10347                                           rdev, wdev, cookie, chan, 0, gfp);
10348 }
10349 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
10350
10351 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
10352                       struct station_info *sinfo, gfp_t gfp)
10353 {
10354         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10355         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10356         struct sk_buff *msg;
10357
10358         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
10359
10360         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10361         if (!msg)
10362                 return;
10363
10364         if (nl80211_send_station(msg, 0, 0, 0,
10365                                  rdev, dev, mac_addr, sinfo) < 0) {
10366                 nlmsg_free(msg);
10367                 return;
10368         }
10369
10370         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10371                                 NL80211_MCGRP_MLME, gfp);
10372 }
10373 EXPORT_SYMBOL(cfg80211_new_sta);
10374
10375 void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp)
10376 {
10377         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10378         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10379         struct sk_buff *msg;
10380         void *hdr;
10381
10382         trace_cfg80211_del_sta(dev, mac_addr);
10383
10384         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10385         if (!msg)
10386                 return;
10387
10388         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
10389         if (!hdr) {
10390                 nlmsg_free(msg);
10391                 return;
10392         }
10393
10394         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10395             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
10396                 goto nla_put_failure;
10397
10398         genlmsg_end(msg, hdr);
10399
10400         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10401                                 NL80211_MCGRP_MLME, gfp);
10402         return;
10403
10404  nla_put_failure:
10405         genlmsg_cancel(msg, hdr);
10406         nlmsg_free(msg);
10407 }
10408 EXPORT_SYMBOL(cfg80211_del_sta);
10409
10410 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
10411                           enum nl80211_connect_failed_reason reason,
10412                           gfp_t gfp)
10413 {
10414         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
10415         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10416         struct sk_buff *msg;
10417         void *hdr;
10418
10419         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10420         if (!msg)
10421                 return;
10422
10423         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
10424         if (!hdr) {
10425                 nlmsg_free(msg);
10426                 return;
10427         }
10428
10429         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10430             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
10431             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
10432                 goto nla_put_failure;
10433
10434         genlmsg_end(msg, hdr);
10435
10436         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10437                                 NL80211_MCGRP_MLME, gfp);
10438         return;
10439
10440  nla_put_failure:
10441         genlmsg_cancel(msg, hdr);
10442         nlmsg_free(msg);
10443 }
10444 EXPORT_SYMBOL(cfg80211_conn_failed);
10445
10446 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
10447                                        const u8 *addr, gfp_t gfp)
10448 {
10449         struct wireless_dev *wdev = dev->ieee80211_ptr;
10450         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10451         struct sk_buff *msg;
10452         void *hdr;
10453         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
10454
10455         if (!nlportid)
10456                 return false;
10457
10458         msg = nlmsg_new(100, gfp);
10459         if (!msg)
10460                 return true;
10461
10462         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
10463         if (!hdr) {
10464                 nlmsg_free(msg);
10465                 return true;
10466         }
10467
10468         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10469             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10470             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
10471                 goto nla_put_failure;
10472
10473         genlmsg_end(msg, hdr);
10474         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10475         return true;
10476
10477  nla_put_failure:
10478         genlmsg_cancel(msg, hdr);
10479         nlmsg_free(msg);
10480         return true;
10481 }
10482
10483 bool cfg80211_rx_spurious_frame(struct net_device *dev,
10484                                 const u8 *addr, gfp_t gfp)
10485 {
10486         struct wireless_dev *wdev = dev->ieee80211_ptr;
10487         bool ret;
10488
10489         trace_cfg80211_rx_spurious_frame(dev, addr);
10490
10491         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10492                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
10493                 trace_cfg80211_return_bool(false);
10494                 return false;
10495         }
10496         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
10497                                          addr, gfp);
10498         trace_cfg80211_return_bool(ret);
10499         return ret;
10500 }
10501 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
10502
10503 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
10504                                         const u8 *addr, gfp_t gfp)
10505 {
10506         struct wireless_dev *wdev = dev->ieee80211_ptr;
10507         bool ret;
10508
10509         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
10510
10511         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10512                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10513                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
10514                 trace_cfg80211_return_bool(false);
10515                 return false;
10516         }
10517         ret = __nl80211_unexpected_frame(dev,
10518                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
10519                                          addr, gfp);
10520         trace_cfg80211_return_bool(ret);
10521         return ret;
10522 }
10523 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
10524
10525 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
10526                       struct wireless_dev *wdev, u32 nlportid,
10527                       int freq, int sig_dbm,
10528                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
10529 {
10530         struct net_device *netdev = wdev->netdev;
10531         struct sk_buff *msg;
10532         void *hdr;
10533
10534         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10535         if (!msg)
10536                 return -ENOMEM;
10537
10538         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10539         if (!hdr) {
10540                 nlmsg_free(msg);
10541                 return -ENOMEM;
10542         }
10543
10544         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10545             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10546                                         netdev->ifindex)) ||
10547             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10548             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
10549             (sig_dbm &&
10550              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10551             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10552             (flags &&
10553              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
10554                 goto nla_put_failure;
10555
10556         genlmsg_end(msg, hdr);
10557
10558         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
10559
10560  nla_put_failure:
10561         genlmsg_cancel(msg, hdr);
10562         nlmsg_free(msg);
10563         return -ENOBUFS;
10564 }
10565
10566 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
10567                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
10568 {
10569         struct wiphy *wiphy = wdev->wiphy;
10570         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10571         struct net_device *netdev = wdev->netdev;
10572         struct sk_buff *msg;
10573         void *hdr;
10574
10575         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
10576
10577         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10578         if (!msg)
10579                 return;
10580
10581         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
10582         if (!hdr) {
10583                 nlmsg_free(msg);
10584                 return;
10585         }
10586
10587         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10588             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10589                                    netdev->ifindex)) ||
10590             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
10591             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
10592             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10593             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
10594                 goto nla_put_failure;
10595
10596         genlmsg_end(msg, hdr);
10597
10598         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10599                                 NL80211_MCGRP_MLME, gfp);
10600         return;
10601
10602  nla_put_failure:
10603         genlmsg_cancel(msg, hdr);
10604         nlmsg_free(msg);
10605 }
10606 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
10607
10608 void cfg80211_cqm_rssi_notify(struct net_device *dev,
10609                               enum nl80211_cqm_rssi_threshold_event rssi_event,
10610                               gfp_t gfp)
10611 {
10612         struct wireless_dev *wdev = dev->ieee80211_ptr;
10613         struct wiphy *wiphy = wdev->wiphy;
10614         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10615         struct sk_buff *msg;
10616         struct nlattr *pinfoattr;
10617         void *hdr;
10618
10619         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
10620
10621         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10622         if (!msg)
10623                 return;
10624
10625         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10626         if (!hdr) {
10627                 nlmsg_free(msg);
10628                 return;
10629         }
10630
10631         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10632             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
10633                 goto nla_put_failure;
10634
10635         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10636         if (!pinfoattr)
10637                 goto nla_put_failure;
10638
10639         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
10640                         rssi_event))
10641                 goto nla_put_failure;
10642
10643         nla_nest_end(msg, pinfoattr);
10644
10645         genlmsg_end(msg, hdr);
10646
10647         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10648                                 NL80211_MCGRP_MLME, gfp);
10649         return;
10650
10651  nla_put_failure:
10652         genlmsg_cancel(msg, hdr);
10653         nlmsg_free(msg);
10654 }
10655 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
10656
10657 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
10658                                      struct net_device *netdev, const u8 *bssid,
10659                                      const u8 *replay_ctr, gfp_t gfp)
10660 {
10661         struct sk_buff *msg;
10662         struct nlattr *rekey_attr;
10663         void *hdr;
10664
10665         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10666         if (!msg)
10667                 return;
10668
10669         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
10670         if (!hdr) {
10671                 nlmsg_free(msg);
10672                 return;
10673         }
10674
10675         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10676             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10677             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
10678                 goto nla_put_failure;
10679
10680         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
10681         if (!rekey_attr)
10682                 goto nla_put_failure;
10683
10684         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
10685                     NL80211_REPLAY_CTR_LEN, replay_ctr))
10686                 goto nla_put_failure;
10687
10688         nla_nest_end(msg, rekey_attr);
10689
10690         genlmsg_end(msg, hdr);
10691
10692         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10693                                 NL80211_MCGRP_MLME, gfp);
10694         return;
10695
10696  nla_put_failure:
10697         genlmsg_cancel(msg, hdr);
10698         nlmsg_free(msg);
10699 }
10700
10701 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
10702                                const u8 *replay_ctr, gfp_t gfp)
10703 {
10704         struct wireless_dev *wdev = dev->ieee80211_ptr;
10705         struct wiphy *wiphy = wdev->wiphy;
10706         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10707
10708         trace_cfg80211_gtk_rekey_notify(dev, bssid);
10709         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
10710 }
10711 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
10712
10713 static void
10714 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
10715                                struct net_device *netdev, int index,
10716                                const u8 *bssid, bool preauth, gfp_t gfp)
10717 {
10718         struct sk_buff *msg;
10719         struct nlattr *attr;
10720         void *hdr;
10721
10722         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10723         if (!msg)
10724                 return;
10725
10726         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
10727         if (!hdr) {
10728                 nlmsg_free(msg);
10729                 return;
10730         }
10731
10732         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10733             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10734                 goto nla_put_failure;
10735
10736         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
10737         if (!attr)
10738                 goto nla_put_failure;
10739
10740         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
10741             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
10742             (preauth &&
10743              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
10744                 goto nla_put_failure;
10745
10746         nla_nest_end(msg, attr);
10747
10748         genlmsg_end(msg, hdr);
10749
10750         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10751                                 NL80211_MCGRP_MLME, gfp);
10752         return;
10753
10754  nla_put_failure:
10755         genlmsg_cancel(msg, hdr);
10756         nlmsg_free(msg);
10757 }
10758
10759 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
10760                                      const u8 *bssid, bool preauth, gfp_t gfp)
10761 {
10762         struct wireless_dev *wdev = dev->ieee80211_ptr;
10763         struct wiphy *wiphy = wdev->wiphy;
10764         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10765
10766         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
10767         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
10768 }
10769 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
10770
10771 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
10772                                      struct net_device *netdev,
10773                                      struct cfg80211_chan_def *chandef,
10774                                      gfp_t gfp)
10775 {
10776         struct sk_buff *msg;
10777         void *hdr;
10778
10779         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10780         if (!msg)
10781                 return;
10782
10783         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
10784         if (!hdr) {
10785                 nlmsg_free(msg);
10786                 return;
10787         }
10788
10789         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
10790                 goto nla_put_failure;
10791
10792         if (nl80211_send_chandef(msg, chandef))
10793                 goto nla_put_failure;
10794
10795         genlmsg_end(msg, hdr);
10796
10797         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10798                                 NL80211_MCGRP_MLME, gfp);
10799         return;
10800
10801  nla_put_failure:
10802         genlmsg_cancel(msg, hdr);
10803         nlmsg_free(msg);
10804 }
10805
10806 void cfg80211_ch_switch_notify(struct net_device *dev,
10807                                struct cfg80211_chan_def *chandef)
10808 {
10809         struct wireless_dev *wdev = dev->ieee80211_ptr;
10810         struct wiphy *wiphy = wdev->wiphy;
10811         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10812
10813         trace_cfg80211_ch_switch_notify(dev, chandef);
10814
10815         wdev_lock(wdev);
10816
10817         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
10818                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
10819                     wdev->iftype != NL80211_IFTYPE_ADHOC &&
10820                     wdev->iftype != NL80211_IFTYPE_MESH_POINT))
10821                 goto out;
10822
10823         wdev->channel = chandef->chan;
10824         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL);
10825 out:
10826         wdev_unlock(wdev);
10827         return;
10828 }
10829 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
10830
10831 void cfg80211_cqm_txe_notify(struct net_device *dev,
10832                              const u8 *peer, u32 num_packets,
10833                              u32 rate, u32 intvl, gfp_t gfp)
10834 {
10835         struct wireless_dev *wdev = dev->ieee80211_ptr;
10836         struct wiphy *wiphy = wdev->wiphy;
10837         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10838         struct sk_buff *msg;
10839         struct nlattr *pinfoattr;
10840         void *hdr;
10841
10842         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
10843         if (!msg)
10844                 return;
10845
10846         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10847         if (!hdr) {
10848                 nlmsg_free(msg);
10849                 return;
10850         }
10851
10852         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10853             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10854             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10855                 goto nla_put_failure;
10856
10857         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10858         if (!pinfoattr)
10859                 goto nla_put_failure;
10860
10861         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
10862                 goto nla_put_failure;
10863
10864         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
10865                 goto nla_put_failure;
10866
10867         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
10868                 goto nla_put_failure;
10869
10870         nla_nest_end(msg, pinfoattr);
10871
10872         genlmsg_end(msg, hdr);
10873
10874         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10875                                 NL80211_MCGRP_MLME, gfp);
10876         return;
10877
10878  nla_put_failure:
10879         genlmsg_cancel(msg, hdr);
10880         nlmsg_free(msg);
10881 }
10882 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
10883
10884 void
10885 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
10886                      struct cfg80211_chan_def *chandef,
10887                      enum nl80211_radar_event event,
10888                      struct net_device *netdev, gfp_t gfp)
10889 {
10890         struct sk_buff *msg;
10891         void *hdr;
10892
10893         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10894         if (!msg)
10895                 return;
10896
10897         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
10898         if (!hdr) {
10899                 nlmsg_free(msg);
10900                 return;
10901         }
10902
10903         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
10904                 goto nla_put_failure;
10905
10906         /* NOP and radar events don't need a netdev parameter */
10907         if (netdev) {
10908                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
10909
10910                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10911                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10912                         goto nla_put_failure;
10913         }
10914
10915         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10916                 goto nla_put_failure;
10917
10918         if (nl80211_send_chandef(msg, chandef))
10919                 goto nla_put_failure;
10920
10921         genlmsg_end(msg, hdr);
10922
10923         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10924                                 NL80211_MCGRP_MLME, gfp);
10925         return;
10926
10927  nla_put_failure:
10928         genlmsg_cancel(msg, hdr);
10929         nlmsg_free(msg);
10930 }
10931
10932 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
10933                                  const u8 *peer, u32 num_packets, gfp_t gfp)
10934 {
10935         struct wireless_dev *wdev = dev->ieee80211_ptr;
10936         struct wiphy *wiphy = wdev->wiphy;
10937         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10938         struct sk_buff *msg;
10939         struct nlattr *pinfoattr;
10940         void *hdr;
10941
10942         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
10943
10944         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10945         if (!msg)
10946                 return;
10947
10948         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10949         if (!hdr) {
10950                 nlmsg_free(msg);
10951                 return;
10952         }
10953
10954         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10955             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10956             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10957                 goto nla_put_failure;
10958
10959         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10960         if (!pinfoattr)
10961                 goto nla_put_failure;
10962
10963         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10964                 goto nla_put_failure;
10965
10966         nla_nest_end(msg, pinfoattr);
10967
10968         genlmsg_end(msg, hdr);
10969
10970         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
10971                                 NL80211_MCGRP_MLME, gfp);
10972         return;
10973
10974  nla_put_failure:
10975         genlmsg_cancel(msg, hdr);
10976         nlmsg_free(msg);
10977 }
10978 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
10979
10980 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10981                            u64 cookie, bool acked, gfp_t gfp)
10982 {
10983         struct wireless_dev *wdev = dev->ieee80211_ptr;
10984         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10985         struct sk_buff *msg;
10986         void *hdr;
10987
10988         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10989
10990         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10991
10992         if (!msg)
10993                 return;
10994
10995         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10996         if (!hdr) {
10997                 nlmsg_free(msg);
10998                 return;
10999         }
11000
11001         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11002             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11003             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
11004             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
11005             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
11006                 goto nla_put_failure;
11007
11008         genlmsg_end(msg, hdr);
11009
11010         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11011                                 NL80211_MCGRP_MLME, gfp);
11012         return;
11013
11014  nla_put_failure:
11015         genlmsg_cancel(msg, hdr);
11016         nlmsg_free(msg);
11017 }
11018 EXPORT_SYMBOL(cfg80211_probe_status);
11019
11020 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
11021                                  const u8 *frame, size_t len,
11022                                  int freq, int sig_dbm)
11023 {
11024         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11025         struct sk_buff *msg;
11026         void *hdr;
11027         struct cfg80211_beacon_registration *reg;
11028
11029         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
11030
11031         spin_lock_bh(&rdev->beacon_registrations_lock);
11032         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
11033                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
11034                 if (!msg) {
11035                         spin_unlock_bh(&rdev->beacon_registrations_lock);
11036                         return;
11037                 }
11038
11039                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
11040                 if (!hdr)
11041                         goto nla_put_failure;
11042
11043                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11044                     (freq &&
11045                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
11046                     (sig_dbm &&
11047                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
11048                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
11049                         goto nla_put_failure;
11050
11051                 genlmsg_end(msg, hdr);
11052
11053                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
11054         }
11055         spin_unlock_bh(&rdev->beacon_registrations_lock);
11056         return;
11057
11058  nla_put_failure:
11059         spin_unlock_bh(&rdev->beacon_registrations_lock);
11060         if (hdr)
11061                 genlmsg_cancel(msg, hdr);
11062         nlmsg_free(msg);
11063 }
11064 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
11065
11066 #ifdef CONFIG_PM
11067 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
11068                                    struct cfg80211_wowlan_wakeup *wakeup,
11069                                    gfp_t gfp)
11070 {
11071         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11072         struct sk_buff *msg;
11073         void *hdr;
11074         int size = 200;
11075
11076         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
11077
11078         if (wakeup)
11079                 size += wakeup->packet_present_len;
11080
11081         msg = nlmsg_new(size, gfp);
11082         if (!msg)
11083                 return;
11084
11085         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
11086         if (!hdr)
11087                 goto free_msg;
11088
11089         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11090             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11091                 goto free_msg;
11092
11093         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11094                                         wdev->netdev->ifindex))
11095                 goto free_msg;
11096
11097         if (wakeup) {
11098                 struct nlattr *reasons;
11099
11100                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
11101                 if (!reasons)
11102                         goto free_msg;
11103
11104                 if (wakeup->disconnect &&
11105                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
11106                         goto free_msg;
11107                 if (wakeup->magic_pkt &&
11108                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
11109                         goto free_msg;
11110                 if (wakeup->gtk_rekey_failure &&
11111                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
11112                         goto free_msg;
11113                 if (wakeup->eap_identity_req &&
11114                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
11115                         goto free_msg;
11116                 if (wakeup->four_way_handshake &&
11117                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
11118                         goto free_msg;
11119                 if (wakeup->rfkill_release &&
11120                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
11121                         goto free_msg;
11122
11123                 if (wakeup->pattern_idx >= 0 &&
11124                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
11125                                 wakeup->pattern_idx))
11126                         goto free_msg;
11127
11128                 if (wakeup->tcp_match &&
11129                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
11130                         goto free_msg;
11131
11132                 if (wakeup->tcp_connlost &&
11133                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
11134                         goto free_msg;
11135
11136                 if (wakeup->tcp_nomoretokens &&
11137                     nla_put_flag(msg,
11138                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
11139                         goto free_msg;
11140
11141                 if (wakeup->packet) {
11142                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
11143                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
11144
11145                         if (!wakeup->packet_80211) {
11146                                 pkt_attr =
11147                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
11148                                 len_attr =
11149                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
11150                         }
11151
11152                         if (wakeup->packet_len &&
11153                             nla_put_u32(msg, len_attr, wakeup->packet_len))
11154                                 goto free_msg;
11155
11156                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
11157                                     wakeup->packet))
11158                                 goto free_msg;
11159                 }
11160
11161                 nla_nest_end(msg, reasons);
11162         }
11163
11164         genlmsg_end(msg, hdr);
11165
11166         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11167                                 NL80211_MCGRP_MLME, gfp);
11168         return;
11169
11170  free_msg:
11171         nlmsg_free(msg);
11172 }
11173 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
11174 #endif
11175
11176 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
11177                                 enum nl80211_tdls_operation oper,
11178                                 u16 reason_code, gfp_t gfp)
11179 {
11180         struct wireless_dev *wdev = dev->ieee80211_ptr;
11181         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
11182         struct sk_buff *msg;
11183         void *hdr;
11184
11185         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
11186                                          reason_code);
11187
11188         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11189         if (!msg)
11190                 return;
11191
11192         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
11193         if (!hdr) {
11194                 nlmsg_free(msg);
11195                 return;
11196         }
11197
11198         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11199             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
11200             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
11201             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
11202             (reason_code > 0 &&
11203              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
11204                 goto nla_put_failure;
11205
11206         genlmsg_end(msg, hdr);
11207
11208         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11209                                 NL80211_MCGRP_MLME, gfp);
11210         return;
11211
11212  nla_put_failure:
11213         genlmsg_cancel(msg, hdr);
11214         nlmsg_free(msg);
11215 }
11216 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
11217
11218 static int nl80211_netlink_notify(struct notifier_block * nb,
11219                                   unsigned long state,
11220                                   void *_notify)
11221 {
11222         struct netlink_notify *notify = _notify;
11223         struct cfg80211_registered_device *rdev;
11224         struct wireless_dev *wdev;
11225         struct cfg80211_beacon_registration *reg, *tmp;
11226
11227         if (state != NETLINK_URELEASE)
11228                 return NOTIFY_DONE;
11229
11230         rcu_read_lock();
11231
11232         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
11233                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
11234                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
11235
11236                 spin_lock_bh(&rdev->beacon_registrations_lock);
11237                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
11238                                          list) {
11239                         if (reg->nlportid == notify->portid) {
11240                                 list_del(&reg->list);
11241                                 kfree(reg);
11242                                 break;
11243                         }
11244                 }
11245                 spin_unlock_bh(&rdev->beacon_registrations_lock);
11246         }
11247
11248         rcu_read_unlock();
11249
11250         return NOTIFY_DONE;
11251 }
11252
11253 static struct notifier_block nl80211_netlink_notifier = {
11254         .notifier_call = nl80211_netlink_notify,
11255 };
11256
11257 void cfg80211_ft_event(struct net_device *netdev,
11258                        struct cfg80211_ft_event_params *ft_event)
11259 {
11260         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
11261         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
11262         struct sk_buff *msg;
11263         void *hdr;
11264
11265         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
11266
11267         if (!ft_event->target_ap)
11268                 return;
11269
11270         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11271         if (!msg)
11272                 return;
11273
11274         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
11275         if (!hdr)
11276                 goto out;
11277
11278         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11279             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11280             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
11281                 goto out;
11282
11283         if (ft_event->ies &&
11284             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
11285                 goto out;
11286         if (ft_event->ric_ies &&
11287             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
11288                     ft_event->ric_ies))
11289                 goto out;
11290
11291         genlmsg_end(msg, hdr);
11292
11293         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11294                                 NL80211_MCGRP_MLME, GFP_KERNEL);
11295         return;
11296  out:
11297         nlmsg_free(msg);
11298 }
11299 EXPORT_SYMBOL(cfg80211_ft_event);
11300
11301 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
11302 {
11303         struct cfg80211_registered_device *rdev;
11304         struct sk_buff *msg;
11305         void *hdr;
11306         u32 nlportid;
11307
11308         rdev = wiphy_to_dev(wdev->wiphy);
11309         if (!rdev->crit_proto_nlportid)
11310                 return;
11311
11312         nlportid = rdev->crit_proto_nlportid;
11313         rdev->crit_proto_nlportid = 0;
11314
11315         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11316         if (!msg)
11317                 return;
11318
11319         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
11320         if (!hdr)
11321                 goto nla_put_failure;
11322
11323         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11324             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11325                 goto nla_put_failure;
11326
11327         genlmsg_end(msg, hdr);
11328
11329         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
11330         return;
11331
11332  nla_put_failure:
11333         if (hdr)
11334                 genlmsg_cancel(msg, hdr);
11335         nlmsg_free(msg);
11336
11337 }
11338 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
11339
11340 /* initialisation/exit functions */
11341
11342 int nl80211_init(void)
11343 {
11344         int err;
11345
11346         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
11347                                                    nl80211_mcgrps);
11348         if (err)
11349                 return err;
11350
11351         err = netlink_register_notifier(&nl80211_netlink_notifier);
11352         if (err)
11353                 goto err_out;
11354
11355         return 0;
11356  err_out:
11357         genl_unregister_family(&nl80211_fam);
11358         return err;
11359 }
11360
11361 void nl80211_exit(void)
11362 {
11363         netlink_unregister_notifier(&nl80211_netlink_notifier);
11364         genl_unregister_family(&nl80211_fam);
11365 }