net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015-2016  Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                             struct genl_info *info);
  37 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  38                               struct genl_info *info);
  39
  40 /* the netlink family */
  41 static struct genl_family nl80211_fam = {
  42         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  43         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  44         .hdrsize = 0,                   /* no private header */
  45         .version = 1,                   /* no particular meaning now */
  46         .maxattr = NL80211_ATTR_MAX,
  47         .netnsok = true,
  48         .pre_doit = nl80211_pre_doit,
  49         .post_doit = nl80211_post_doit,
  50 };
  51
  52 /* multicast groups */
  53 enum nl80211_multicast_groups {
  54         NL80211_MCGRP_CONFIG,
  55         NL80211_MCGRP_SCAN,
  56         NL80211_MCGRP_REGULATORY,
  57         NL80211_MCGRP_MLME,
  58         NL80211_MCGRP_VENDOR,
  59         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  60 };
  61
  62 static const struct genl_multicast_group nl80211_mcgrps[] = {
  63         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  64         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  65         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  66         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  67         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  68 #ifdef CONFIG_NL80211_TESTMODE
  69         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  70 #endif
  71 };
  72
  73 /* returns ERR_PTR values */
  74 static struct wireless_dev *
  75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  76 {
  77         struct cfg80211_registered_device *rdev;
  78         struct wireless_dev *result = NULL;
  79         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  80         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  81         u64 wdev_id;
  82         int wiphy_idx = -1;
  83         int ifidx = -1;
  84
  85         ASSERT_RTNL();
  86
  87         if (!have_ifidx && !have_wdev_id)
  88                 return ERR_PTR(-EINVAL);
  89
  90         if (have_ifidx)
  91                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  92         if (have_wdev_id) {
  93                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  94                 wiphy_idx = wdev_id >> 32;
  95         }
  96
  97         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  98                 struct wireless_dev *wdev;
  99
 100                 if (wiphy_net(&rdev->wiphy) != netns)
 101                         continue;
 102
 103                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 104                         continue;
 105
 106                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 107                         if (have_ifidx && wdev->netdev &&
 108                             wdev->netdev->ifindex == ifidx) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 113                                 result = wdev;
 114                                 break;
 115                         }
 116                 }
 117
 118                 if (result)
 119                         break;
 120         }
 121
 122         if (result)
 123                 return result;
 124         return ERR_PTR(-ENODEV);
 125 }
 126
 127 static struct cfg80211_registered_device *
 128 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 129 {
 130         struct cfg80211_registered_device *rdev = NULL, *tmp;
 131         struct net_device *netdev;
 132
 133         ASSERT_RTNL();
 134
 135         if (!attrs[NL80211_ATTR_WIPHY] &&
 136             !attrs[NL80211_ATTR_IFINDEX] &&
 137             !attrs[NL80211_ATTR_WDEV])
 138                 return ERR_PTR(-EINVAL);
 139
 140         if (attrs[NL80211_ATTR_WIPHY])
 141                 rdev = cfg80211_rdev_by_wiphy_idx(
 142                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 143
 144         if (attrs[NL80211_ATTR_WDEV]) {
 145                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 146                 struct wireless_dev *wdev;
 147                 bool found = false;
 148
 149                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 150                 if (tmp) {
 151                         /* make sure wdev exists */
 152                         list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
 153                                 if (wdev->identifier != (u32)wdev_id)
 154                                         continue;
 155                                 found = true;
 156                                 break;
 157                         }
 158
 159                         if (!found)
 160                                 tmp = NULL;
 161
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164                         rdev = tmp;
 165                 }
 166         }
 167
 168         if (attrs[NL80211_ATTR_IFINDEX]) {
 169                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 170
 171                 netdev = __dev_get_by_index(netns, ifindex);
 172                 if (netdev) {
 173                         if (netdev->ieee80211_ptr)
 174                                 tmp = wiphy_to_rdev(
 175                                         netdev->ieee80211_ptr->wiphy);
 176                         else
 177                                 tmp = NULL;
 178
 179                         /* not wireless device -- return error */
 180                         if (!tmp)
 181                                 return ERR_PTR(-EINVAL);
 182
 183                         /* mismatch -- return error */
 184                         if (rdev && tmp != rdev)
 185                                 return ERR_PTR(-EINVAL);
 186
 187                         rdev = tmp;
 188                 }
 189         }
 190
 191         if (!rdev)
 192                 return ERR_PTR(-ENODEV);
 193
 194         if (netns != wiphy_net(&rdev->wiphy))
 195                 return ERR_PTR(-ENODEV);
 196
 197         return rdev;
 198 }
 199
 200 /*
 201  * This function returns a pointer to the driver
 202  * that the genl_info item that is passed refers to.
 203  *
 204  * The result of this can be a PTR_ERR and hence must
 205  * be checked with IS_ERR() for errors.
 206  */
 207 static struct cfg80211_registered_device *
 208 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 209 {
 210         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 211 }
 212
 213 /* policy for the attributes */
 214 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 215         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 216         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 217                                       .len = 20-1 },
 218         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 219
 220         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 221         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 223         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 224         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 227         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 228         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 230         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 231         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 232
 233         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 234         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 235         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 236
 237         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 238         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 239
 240         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 241         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 242                                     .len = WLAN_MAX_KEY_LEN },
 243         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 244         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 245         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 246         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 247         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 248
 249         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 250         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 251         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 252                                        .len = IEEE80211_MAX_DATA_LEN },
 253         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 254                                        .len = IEEE80211_MAX_DATA_LEN },
 255         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 256         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 257         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 258         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 259                                                .len = NL80211_MAX_SUPP_RATES },
 260         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 261         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 262         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 263         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 264                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 265         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 266
 267         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 268         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 269
 270         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 273         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 274                                            .len = NL80211_MAX_SUPP_RATES },
 275         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 276
 277         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 278         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 279
 280         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 281
 282         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 283         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 284                               .len = IEEE80211_MAX_DATA_LEN },
 285         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 286         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 287
 288         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 289                                 .len = IEEE80211_MAX_SSID_LEN },
 290         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 291         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 292         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 293         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 295         [NL80211_ATTR_STA_FLAGS2] = {
 296                 .len = sizeof(struct nl80211_sta_flag_update),
 297         },
 298         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 300         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 303         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 304         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 305         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 306         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 307                                  .len = WLAN_PMKID_LEN },
 308         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 309         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 310         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 311         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 312                                  .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 314         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 315         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 316         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 317         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 318         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 319         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 320         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 321         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 322         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 323         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 324         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 325         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 328         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 329         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 330         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 331         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 332         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 333                                          .len = IEEE80211_MAX_DATA_LEN },
 334         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 335                                          .len = IEEE80211_MAX_DATA_LEN },
 336         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 337         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 339         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 342         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 347                                       .len = IEEE80211_MAX_DATA_LEN },
 348         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 351                 .len = NL80211_HT_CAPABILITY_LEN
 352         },
 353         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 354         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 355         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 356         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 357         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 358         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 359         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 360         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 361         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 362         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 363         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 364         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 365         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 366         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 367         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 368         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 369         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 370                 .len = NL80211_VHT_CAPABILITY_LEN,
 371         },
 372         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 373         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 374                                   .len = IEEE80211_MAX_DATA_LEN },
 375         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 376         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 377         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 378         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 379         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 382         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 383         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 384         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 385         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 386         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 387         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 388         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 389                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 390         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 391         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 392         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 393         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 395         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 396         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 397         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 398         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 399         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 400         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 401         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 402         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 403         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 404         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 405         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 406         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 407         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 408         [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
 409                 .len = VHT_MUMIMO_GROUPS_DATA_LEN
 410         },
 411         [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
 412 };
 413
 414 /* policy for the key attributes */
 415 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 416         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 417         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 418         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 419         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 420         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 421         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 422         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 423         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 424 };
 425
 426 /* policy for the key default flags */
 427 static const struct nla_policy
 428 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 429         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 430         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 431 };
 432
 433 /* policy for WoWLAN attributes */
 434 static const struct nla_policy
 435 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 436         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 439         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 440         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 441         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 442         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 443         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 444         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 445         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 446 };
 447
 448 static const struct nla_policy
 449 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 450         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 451         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 452         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 453         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 454         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 455         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 456         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 457                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 458         },
 459         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 460                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 461         },
 462         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 463         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 464         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 465 };
 466
 467 /* policy for coalesce rule attributes */
 468 static const struct nla_policy
 469 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 470         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 471         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 472         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 473 };
 474
 475 /* policy for GTK rekey offload attributes */
 476 static const struct nla_policy
 477 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 478         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 479         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 480         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 481 };
 482
 483 static const struct nla_policy
 484 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 485         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 486                                                  .len = IEEE80211_MAX_SSID_LEN },
 487         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 488 };
 489
 490 static const struct nla_policy
 491 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 492         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 493         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 494 };
 495
 496 static const struct nla_policy
 497 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 498         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 499         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 500         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 501                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 502         },
 503 };
 504
 505 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 506                                      struct netlink_callback *cb,
 507                                      struct cfg80211_registered_device **rdev,
 508                                      struct wireless_dev **wdev)
 509 {
 510         int err;
 511
 512         rtnl_lock();
 513
 514         if (!cb->args[0]) {
 515                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 516                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 517                                   nl80211_policy);
 518                 if (err)
 519                         goto out_unlock;
 520
 521                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 522                                                    nl80211_fam.attrbuf);
 523                 if (IS_ERR(*wdev)) {
 524                         err = PTR_ERR(*wdev);
 525                         goto out_unlock;
 526                 }
 527                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 528                 /* 0 is the first index - add 1 to parse only once */
 529                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 530                 cb->args[1] = (*wdev)->identifier;
 531         } else {
 532                 /* subtract the 1 again here */
 533                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 534                 struct wireless_dev *tmp;
 535
 536                 if (!wiphy) {
 537                         err = -ENODEV;
 538                         goto out_unlock;
 539                 }
 540                 *rdev = wiphy_to_rdev(wiphy);
 541                 *wdev = NULL;
 542
 543                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 544                         if (tmp->identifier == cb->args[1]) {
 545                                 *wdev = tmp;
 546                                 break;
 547                         }
 548                 }
 549
 550                 if (!*wdev) {
 551                         err = -ENODEV;
 552                         goto out_unlock;
 553                 }
 554         }
 555
 556         return 0;
 557  out_unlock:
 558         rtnl_unlock();
 559         return err;
 560 }
 561
 562 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 563 {
 564         rtnl_unlock();
 565 }
 566
 567 /* IE validation */
 568 static bool is_valid_ie_attr(const struct nlattr *attr)
 569 {
 570         const u8 *pos;
 571         int len;
 572
 573         if (!attr)
 574                 return true;
 575
 576         pos = nla_data(attr);
 577         len = nla_len(attr);
 578
 579         while (len) {
 580                 u8 elemlen;
 581
 582                 if (len < 2)
 583                         return false;
 584                 len -= 2;
 585
 586                 elemlen = pos[1];
 587                 if (elemlen > len)
 588                         return false;
 589
 590                 len -= elemlen;
 591                 pos += 2 + elemlen;
 592         }
 593
 594         return true;
 595 }
 596
 597 /* message building helper */
 598 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 599                                    int flags, u8 cmd)
 600 {
 601         /* since there is no private header just add the generic one */
 602         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 603 }
 604
 605 static int nl80211_msg_put_channel(struct sk_buff *msg,
 606                                    struct ieee80211_channel *chan,
 607                                    bool large)
 608 {
 609         /* Some channels must be completely excluded from the
 610          * list to protect old user-space tools from breaking
 611          */
 612         if (!large && chan->flags &
 613             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 614                 return 0;
 615
 616         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 617                         chan->center_freq))
 618                 goto nla_put_failure;
 619
 620         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 621             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 622                 goto nla_put_failure;
 623         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 624                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 625                         goto nla_put_failure;
 626                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 627                         goto nla_put_failure;
 628         }
 629         if (chan->flags & IEEE80211_CHAN_RADAR) {
 630                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 631                         goto nla_put_failure;
 632                 if (large) {
 633                         u32 time;
 634
 635                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 636
 637                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 638                                         chan->dfs_state))
 639                                 goto nla_put_failure;
 640                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 641                                         time))
 642                                 goto nla_put_failure;
 643                         if (nla_put_u32(msg,
 644                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 645                                         chan->dfs_cac_ms))
 646                                 goto nla_put_failure;
 647                 }
 648         }
 649
 650         if (large) {
 651                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 652                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 653                         goto nla_put_failure;
 654                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 655                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 656                         goto nla_put_failure;
 657                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 658                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 659                         goto nla_put_failure;
 660                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 661                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 662                         goto nla_put_failure;
 663                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 664                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 665                         goto nla_put_failure;
 666                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 667                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 668                         goto nla_put_failure;
 669                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 670                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 671                         goto nla_put_failure;
 672                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 673                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 674                         goto nla_put_failure;
 675         }
 676
 677         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 678                         DBM_TO_MBM(chan->max_power)))
 679                 goto nla_put_failure;
 680
 681         return 0;
 682
 683  nla_put_failure:
 684         return -ENOBUFS;
 685 }
 686
 687 /* netlink command implementations */
 688
 689 struct key_parse {
 690         struct key_params p;
 691         int idx;
 692         int type;
 693         bool def, defmgmt;
 694         bool def_uni, def_multi;
 695 };
 696
 697 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 698 {
 699         struct nlattr *tb[NL80211_KEY_MAX + 1];
 700         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 701                                    nl80211_key_policy);
 702         if (err)
 703                 return err;
 704
 705         k->def = !!tb[NL80211_KEY_DEFAULT];
 706         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 707
 708         if (k->def) {
 709                 k->def_uni = true;
 710                 k->def_multi = true;
 711         }
 712         if (k->defmgmt)
 713                 k->def_multi = true;
 714
 715         if (tb[NL80211_KEY_IDX])
 716                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 717
 718         if (tb[NL80211_KEY_DATA]) {
 719                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 720                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 721         }
 722
 723         if (tb[NL80211_KEY_SEQ]) {
 724                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 725                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 726         }
 727
 728         if (tb[NL80211_KEY_CIPHER])
 729                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 730
 731         if (tb[NL80211_KEY_TYPE]) {
 732                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 733                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 734                         return -EINVAL;
 735         }
 736
 737         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 738                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 739
 740                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 741                                        tb[NL80211_KEY_DEFAULT_TYPES],
 742                                        nl80211_key_default_policy);
 743                 if (err)
 744                         return err;
 745
 746                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 747                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 754 {
 755         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 756                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 757                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 758         }
 759
 760         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 761                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 762                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 763         }
 764
 765         if (info->attrs[NL80211_ATTR_KEY_IDX])
 766                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 767
 768         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 769                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 770
 771         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 772         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 773
 774         if (k->def) {
 775                 k->def_uni = true;
 776                 k->def_multi = true;
 777         }
 778         if (k->defmgmt)
 779                 k->def_multi = true;
 780
 781         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 782                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 783                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 784                         return -EINVAL;
 785         }
 786
 787         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 788                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 789                 int err = nla_parse_nested(
 790                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 791                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 792                                 nl80211_key_default_policy);
 793                 if (err)
 794                         return err;
 795
 796                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 797                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 798         }
 799
 800         return 0;
 801 }
 802
 803 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 804 {
 805         int err;
 806
 807         memset(k, 0, sizeof(*k));
 808         k->idx = -1;
 809         k->type = -1;
 810
 811         if (info->attrs[NL80211_ATTR_KEY])
 812                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 813         else
 814                 err = nl80211_parse_key_old(info, k);
 815
 816         if (err)
 817                 return err;
 818
 819         if (k->def && k->defmgmt)
 820                 return -EINVAL;
 821
 822         if (k->defmgmt) {
 823                 if (k->def_uni || !k->def_multi)
 824                         return -EINVAL;
 825         }
 826
 827         if (k->idx != -1) {
 828                 if (k->defmgmt) {
 829                         if (k->idx < 4 || k->idx > 5)
 830                                 return -EINVAL;
 831                 } else if (k->def) {
 832                         if (k->idx < 0 || k->idx > 3)
 833                                 return -EINVAL;
 834                 } else {
 835                         if (k->idx < 0 || k->idx > 5)
 836                                 return -EINVAL;
 837                 }
 838         }
 839
 840         return 0;
 841 }
 842
 843 static struct cfg80211_cached_keys *
 844 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 845                        struct nlattr *keys, bool *no_ht)
 846 {
 847         struct key_parse parse;
 848         struct nlattr *key;
 849         struct cfg80211_cached_keys *result;
 850         int rem, err, def = 0;
 851
 852         result = kzalloc(sizeof(*result), GFP_KERNEL);
 853         if (!result)
 854                 return ERR_PTR(-ENOMEM);
 855
 856         result->def = -1;
 857         result->defmgmt = -1;
 858
 859         nla_for_each_nested(key, keys, rem) {
 860                 memset(&parse, 0, sizeof(parse));
 861                 parse.idx = -1;
 862
 863                 err = nl80211_parse_key_new(key, &parse);
 864                 if (err)
 865                         goto error;
 866                 err = -EINVAL;
 867                 if (!parse.p.key)
 868                         goto error;
 869                 if (parse.idx < 0 || parse.idx > 4)
 870                         goto error;
 871                 if (parse.def) {
 872                         if (def)
 873                                 goto error;
 874                         def = 1;
 875                         result->def = parse.idx;
 876                         if (!parse.def_uni || !parse.def_multi)
 877                                 goto error;
 878                 } else if (parse.defmgmt)
 879                         goto error;
 880                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 881                                                      parse.idx, false, NULL);
 882                 if (err)
 883                         goto error;
 884                 result->params[parse.idx].cipher = parse.p.cipher;
 885                 result->params[parse.idx].key_len = parse.p.key_len;
 886                 result->params[parse.idx].key = result->data[parse.idx];
 887                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 888
 889                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 890                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 891                         if (no_ht)
 892                                 *no_ht = true;
 893                 }
 894         }
 895
 896         return result;
 897  error:
 898         kfree(result);
 899         return ERR_PTR(err);
 900 }
 901
 902 static int nl80211_key_allowed(struct wireless_dev *wdev)
 903 {
 904         ASSERT_WDEV_LOCK(wdev);
 905
 906         switch (wdev->iftype) {
 907         case NL80211_IFTYPE_AP:
 908         case NL80211_IFTYPE_AP_VLAN:
 909         case NL80211_IFTYPE_P2P_GO:
 910         case NL80211_IFTYPE_MESH_POINT:
 911                 break;
 912         case NL80211_IFTYPE_ADHOC:
 913         case NL80211_IFTYPE_STATION:
 914         case NL80211_IFTYPE_P2P_CLIENT:
 915                 if (!wdev->current_bss)
 916                         return -ENOLINK;
 917                 break;
 918         case NL80211_IFTYPE_UNSPECIFIED:
 919         case NL80211_IFTYPE_OCB:
 920         case NL80211_IFTYPE_MONITOR:
 921         case NL80211_IFTYPE_P2P_DEVICE:
 922         case NL80211_IFTYPE_WDS:
 923         case NUM_NL80211_IFTYPES:
 924                 return -EINVAL;
 925         }
 926
 927         return 0;
 928 }
 929
 930 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 931                                                         struct nlattr *tb)
 932 {
 933         struct ieee80211_channel *chan;
 934
 935         if (tb == NULL)
 936                 return NULL;
 937         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 938         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 939                 return NULL;
 940         return chan;
 941 }
 942
 943 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 944 {
 945         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 946         int i;
 947
 948         if (!nl_modes)
 949                 goto nla_put_failure;
 950
 951         i = 0;
 952         while (ifmodes) {
 953                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 954                         goto nla_put_failure;
 955                 ifmodes >>= 1;
 956                 i++;
 957         }
 958
 959         nla_nest_end(msg, nl_modes);
 960         return 0;
 961
 962 nla_put_failure:
 963         return -ENOBUFS;
 964 }
 965
 966 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 967                                           struct sk_buff *msg,
 968                                           bool large)
 969 {
 970         struct nlattr *nl_combis;
 971         int i, j;
 972
 973         nl_combis = nla_nest_start(msg,
 974                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 975         if (!nl_combis)
 976                 goto nla_put_failure;
 977
 978         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 979                 const struct ieee80211_iface_combination *c;
 980                 struct nlattr *nl_combi, *nl_limits;
 981
 982                 c = &wiphy->iface_combinations[i];
 983
 984                 nl_combi = nla_nest_start(msg, i + 1);
 985                 if (!nl_combi)
 986                         goto nla_put_failure;
 987
 988                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 989                 if (!nl_limits)
 990                         goto nla_put_failure;
 991
 992                 for (j = 0; j < c->n_limits; j++) {
 993                         struct nlattr *nl_limit;
 994
 995                         nl_limit = nla_nest_start(msg, j + 1);
 996                         if (!nl_limit)
 997                                 goto nla_put_failure;
 998                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 999                                         c->limits[j].max))
1000                                 goto nla_put_failure;
1001                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1002                                                 c->limits[j].types))
1003                                 goto nla_put_failure;
1004                         nla_nest_end(msg, nl_limit);
1005                 }
1006
1007                 nla_nest_end(msg, nl_limits);
1008
1009                 if (c->beacon_int_infra_match &&
1010                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1011                         goto nla_put_failure;
1012                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1013                                 c->num_different_channels) ||
1014                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1015                                 c->max_interfaces))
1016                         goto nla_put_failure;
1017                 if (large &&
1018                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1019                                 c->radar_detect_widths) ||
1020                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1021                                 c->radar_detect_regions)))
1022                         goto nla_put_failure;
1023
1024                 nla_nest_end(msg, nl_combi);
1025         }
1026
1027         nla_nest_end(msg, nl_combis);
1028
1029         return 0;
1030 nla_put_failure:
1031         return -ENOBUFS;
1032 }
1033
1034 #ifdef CONFIG_PM
1035 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1036                                         struct sk_buff *msg)
1037 {
1038         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1039         struct nlattr *nl_tcp;
1040
1041         if (!tcp)
1042                 return 0;
1043
1044         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1045         if (!nl_tcp)
1046                 return -ENOBUFS;
1047
1048         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1049                         tcp->data_payload_max))
1050                 return -ENOBUFS;
1051
1052         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1053                         tcp->data_payload_max))
1054                 return -ENOBUFS;
1055
1056         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1057                 return -ENOBUFS;
1058
1059         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1060                                 sizeof(*tcp->tok), tcp->tok))
1061                 return -ENOBUFS;
1062
1063         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1064                         tcp->data_interval_max))
1065                 return -ENOBUFS;
1066
1067         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1068                         tcp->wake_payload_max))
1069                 return -ENOBUFS;
1070
1071         nla_nest_end(msg, nl_tcp);
1072         return 0;
1073 }
1074
1075 static int nl80211_send_wowlan(struct sk_buff *msg,
1076                                struct cfg80211_registered_device *rdev,
1077                                bool large)
1078 {
1079         struct nlattr *nl_wowlan;
1080
1081         if (!rdev->wiphy.wowlan)
1082                 return 0;
1083
1084         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1085         if (!nl_wowlan)
1086                 return -ENOBUFS;
1087
1088         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1089              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1090             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1091              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1092             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1093              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1094             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1095              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1096             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1097              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1098             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1099              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1100             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1101              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1102             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1103              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1104                 return -ENOBUFS;
1105
1106         if (rdev->wiphy.wowlan->n_patterns) {
1107                 struct nl80211_pattern_support pat = {
1108                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1109                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1110                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1111                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1112                 };
1113
1114                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1115                             sizeof(pat), &pat))
1116                         return -ENOBUFS;
1117         }
1118
1119         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1120             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1121                         rdev->wiphy.wowlan->max_nd_match_sets))
1122                 return -ENOBUFS;
1123
1124         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1125                 return -ENOBUFS;
1126
1127         nla_nest_end(msg, nl_wowlan);
1128
1129         return 0;
1130 }
1131 #endif
1132
1133 static int nl80211_send_coalesce(struct sk_buff *msg,
1134                                  struct cfg80211_registered_device *rdev)
1135 {
1136         struct nl80211_coalesce_rule_support rule;
1137
1138         if (!rdev->wiphy.coalesce)
1139                 return 0;
1140
1141         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1142         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1143         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1144         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1145         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1146         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1147
1148         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1149                 return -ENOBUFS;
1150
1151         return 0;
1152 }
1153
1154 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1155                                       struct ieee80211_supported_band *sband)
1156 {
1157         struct nlattr *nl_rates, *nl_rate;
1158         struct ieee80211_rate *rate;
1159         int i;
1160
1161         /* add HT info */
1162         if (sband->ht_cap.ht_supported &&
1163             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1164                      sizeof(sband->ht_cap.mcs),
1165                      &sband->ht_cap.mcs) ||
1166              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1167                          sband->ht_cap.cap) ||
1168              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1169                         sband->ht_cap.ampdu_factor) ||
1170              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1171                         sband->ht_cap.ampdu_density)))
1172                 return -ENOBUFS;
1173
1174         /* add VHT info */
1175         if (sband->vht_cap.vht_supported &&
1176             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1177                      sizeof(sband->vht_cap.vht_mcs),
1178                      &sband->vht_cap.vht_mcs) ||
1179              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1180                          sband->vht_cap.cap)))
1181                 return -ENOBUFS;
1182
1183         /* add bitrates */
1184         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1185         if (!nl_rates)
1186                 return -ENOBUFS;
1187
1188         for (i = 0; i < sband->n_bitrates; i++) {
1189                 nl_rate = nla_nest_start(msg, i);
1190                 if (!nl_rate)
1191                         return -ENOBUFS;
1192
1193                 rate = &sband->bitrates[i];
1194                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1195                                 rate->bitrate))
1196                         return -ENOBUFS;
1197                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1198                     nla_put_flag(msg,
1199                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1200                         return -ENOBUFS;
1201
1202                 nla_nest_end(msg, nl_rate);
1203         }
1204
1205         nla_nest_end(msg, nl_rates);
1206
1207         return 0;
1208 }
1209
1210 static int
1211 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1212                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1213 {
1214         u16 stypes;
1215         struct nlattr *nl_ftypes, *nl_ifs;
1216         enum nl80211_iftype ift;
1217         int i;
1218
1219         if (!mgmt_stypes)
1220                 return 0;
1221
1222         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1223         if (!nl_ifs)
1224                 return -ENOBUFS;
1225
1226         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1227                 nl_ftypes = nla_nest_start(msg, ift);
1228                 if (!nl_ftypes)
1229                         return -ENOBUFS;
1230                 i = 0;
1231                 stypes = mgmt_stypes[ift].tx;
1232                 while (stypes) {
1233                         if ((stypes & 1) &&
1234                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1235                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1236                                 return -ENOBUFS;
1237                         stypes >>= 1;
1238                         i++;
1239                 }
1240                 nla_nest_end(msg, nl_ftypes);
1241         }
1242
1243         nla_nest_end(msg, nl_ifs);
1244
1245         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1246         if (!nl_ifs)
1247                 return -ENOBUFS;
1248
1249         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1250                 nl_ftypes = nla_nest_start(msg, ift);
1251                 if (!nl_ftypes)
1252                         return -ENOBUFS;
1253                 i = 0;
1254                 stypes = mgmt_stypes[ift].rx;
1255                 while (stypes) {
1256                         if ((stypes & 1) &&
1257                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1258                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1259                                 return -ENOBUFS;
1260                         stypes >>= 1;
1261                         i++;
1262                 }
1263                 nla_nest_end(msg, nl_ftypes);
1264         }
1265         nla_nest_end(msg, nl_ifs);
1266
1267         return 0;
1268 }
1269
1270 struct nl80211_dump_wiphy_state {
1271         s64 filter_wiphy;
1272         long start;
1273         long split_start, band_start, chan_start, capa_start;
1274         bool split;
1275 };
1276
1277 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1278                               enum nl80211_commands cmd,
1279                               struct sk_buff *msg, u32 portid, u32 seq,
1280                               int flags, struct nl80211_dump_wiphy_state *state)
1281 {
1282         void *hdr;
1283         struct nlattr *nl_bands, *nl_band;
1284         struct nlattr *nl_freqs, *nl_freq;
1285         struct nlattr *nl_cmds;
1286         enum nl80211_band band;
1287         struct ieee80211_channel *chan;
1288         int i;
1289         const struct ieee80211_txrx_stypes *mgmt_stypes =
1290                                 rdev->wiphy.mgmt_stypes;
1291         u32 features;
1292
1293         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1294         if (!hdr)
1295                 return -ENOBUFS;
1296
1297         if (WARN_ON(!state))
1298                 return -EINVAL;
1299
1300         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1301             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1302                            wiphy_name(&rdev->wiphy)) ||
1303             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1304                         cfg80211_rdev_list_generation))
1305                 goto nla_put_failure;
1306
1307         if (cmd != NL80211_CMD_NEW_WIPHY)
1308                 goto finish;
1309
1310         switch (state->split_start) {
1311         case 0:
1312                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1313                                rdev->wiphy.retry_short) ||
1314                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1315                                rdev->wiphy.retry_long) ||
1316                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1317                                 rdev->wiphy.frag_threshold) ||
1318                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1319                                 rdev->wiphy.rts_threshold) ||
1320                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1321                                rdev->wiphy.coverage_class) ||
1322                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1323                                rdev->wiphy.max_scan_ssids) ||
1324                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1325                                rdev->wiphy.max_sched_scan_ssids) ||
1326                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1327                                 rdev->wiphy.max_scan_ie_len) ||
1328                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1329                                 rdev->wiphy.max_sched_scan_ie_len) ||
1330                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1331                                rdev->wiphy.max_match_sets) ||
1332                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1333                                 rdev->wiphy.max_sched_scan_plans) ||
1334                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1335                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1336                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1337                                 rdev->wiphy.max_sched_scan_plan_iterations))
1338                         goto nla_put_failure;
1339
1340                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1341                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1342                         goto nla_put_failure;
1343                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1344                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1345                         goto nla_put_failure;
1346                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1347                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1348                         goto nla_put_failure;
1349                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1350                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1351                         goto nla_put_failure;
1352                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1353                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1354                         goto nla_put_failure;
1355                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1356                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1357                         goto nla_put_failure;
1358                 state->split_start++;
1359                 if (state->split)
1360                         break;
1361         case 1:
1362                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1363                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1364                             rdev->wiphy.cipher_suites))
1365                         goto nla_put_failure;
1366
1367                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1368                                rdev->wiphy.max_num_pmkids))
1369                         goto nla_put_failure;
1370
1371                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1372                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1373                         goto nla_put_failure;
1374
1375                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1376                                 rdev->wiphy.available_antennas_tx) ||
1377                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1378                                 rdev->wiphy.available_antennas_rx))
1379                         goto nla_put_failure;
1380
1381                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1382                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1383                                 rdev->wiphy.probe_resp_offload))
1384                         goto nla_put_failure;
1385
1386                 if ((rdev->wiphy.available_antennas_tx ||
1387                      rdev->wiphy.available_antennas_rx) &&
1388                     rdev->ops->get_antenna) {
1389                         u32 tx_ant = 0, rx_ant = 0;
1390                         int res;
1391
1392                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1393                         if (!res) {
1394                                 if (nla_put_u32(msg,
1395                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1396                                                 tx_ant) ||
1397                                     nla_put_u32(msg,
1398                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1399                                                 rx_ant))
1400                                         goto nla_put_failure;
1401                         }
1402                 }
1403
1404                 state->split_start++;
1405                 if (state->split)
1406                         break;
1407         case 2:
1408                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1409                                         rdev->wiphy.interface_modes))
1410                                 goto nla_put_failure;
1411                 state->split_start++;
1412                 if (state->split)
1413                         break;
1414         case 3:
1415                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1416                 if (!nl_bands)
1417                         goto nla_put_failure;
1418
1419                 for (band = state->band_start;
1420                      band < NUM_NL80211_BANDS; band++) {
1421                         struct ieee80211_supported_band *sband;
1422
1423                         sband = rdev->wiphy.bands[band];
1424
1425                         if (!sband)
1426                                 continue;
1427
1428                         nl_band = nla_nest_start(msg, band);
1429                         if (!nl_band)
1430                                 goto nla_put_failure;
1431
1432                         switch (state->chan_start) {
1433                         case 0:
1434                                 if (nl80211_send_band_rateinfo(msg, sband))
1435                                         goto nla_put_failure;
1436                                 state->chan_start++;
1437                                 if (state->split)
1438                                         break;
1439                         default:
1440                                 /* add frequencies */
1441                                 nl_freqs = nla_nest_start(
1442                                         msg, NL80211_BAND_ATTR_FREQS);
1443                                 if (!nl_freqs)
1444                                         goto nla_put_failure;
1445
1446                                 for (i = state->chan_start - 1;
1447                                      i < sband->n_channels;
1448                                      i++) {
1449                                         nl_freq = nla_nest_start(msg, i);
1450                                         if (!nl_freq)
1451                                                 goto nla_put_failure;
1452
1453                                         chan = &sband->channels[i];
1454
1455                                         if (nl80211_msg_put_channel(
1456                                                         msg, chan,
1457                                                         state->split))
1458                                                 goto nla_put_failure;
1459
1460                                         nla_nest_end(msg, nl_freq);
1461                                         if (state->split)
1462                                                 break;
1463                                 }
1464                                 if (i < sband->n_channels)
1465                                         state->chan_start = i + 2;
1466                                 else
1467                                         state->chan_start = 0;
1468                                 nla_nest_end(msg, nl_freqs);
1469                         }
1470
1471                         nla_nest_end(msg, nl_band);
1472
1473                         if (state->split) {
1474                                 /* start again here */
1475                                 if (state->chan_start)
1476                                         band--;
1477                                 break;
1478                         }
1479                 }
1480                 nla_nest_end(msg, nl_bands);
1481
1482                 if (band < NUM_NL80211_BANDS)
1483                         state->band_start = band + 1;
1484                 else
1485                         state->band_start = 0;
1486
1487                 /* if bands & channels are done, continue outside */
1488                 if (state->band_start == 0 && state->chan_start == 0)
1489                         state->split_start++;
1490                 if (state->split)
1491                         break;
1492         case 4:
1493                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1494                 if (!nl_cmds)
1495                         goto nla_put_failure;
1496
1497                 i = 0;
1498 #define CMD(op, n)                                                      \
1499                  do {                                                   \
1500                         if (rdev->ops->op) {                            \
1501                                 i++;                                    \
1502                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1503                                         goto nla_put_failure;           \
1504                         }                                               \
1505                 } while (0)
1506
1507                 CMD(add_virtual_intf, NEW_INTERFACE);
1508                 CMD(change_virtual_intf, SET_INTERFACE);
1509                 CMD(add_key, NEW_KEY);
1510                 CMD(start_ap, START_AP);
1511                 CMD(add_station, NEW_STATION);
1512                 CMD(add_mpath, NEW_MPATH);
1513                 CMD(update_mesh_config, SET_MESH_CONFIG);
1514                 CMD(change_bss, SET_BSS);
1515                 CMD(auth, AUTHENTICATE);
1516                 CMD(assoc, ASSOCIATE);
1517                 CMD(deauth, DEAUTHENTICATE);
1518                 CMD(disassoc, DISASSOCIATE);
1519                 CMD(join_ibss, JOIN_IBSS);
1520                 CMD(join_mesh, JOIN_MESH);
1521                 CMD(set_pmksa, SET_PMKSA);
1522                 CMD(del_pmksa, DEL_PMKSA);
1523                 CMD(flush_pmksa, FLUSH_PMKSA);
1524                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1525                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1526                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1527                 CMD(mgmt_tx, FRAME);
1528                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1529                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1530                         i++;
1531                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1532                                 goto nla_put_failure;
1533                 }
1534                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1535                     rdev->ops->join_mesh) {
1536                         i++;
1537                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1538                                 goto nla_put_failure;
1539                 }
1540                 CMD(set_wds_peer, SET_WDS_PEER);
1541                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1542                         CMD(tdls_mgmt, TDLS_MGMT);
1543                         CMD(tdls_oper, TDLS_OPER);
1544                 }
1545                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1546                         CMD(sched_scan_start, START_SCHED_SCAN);
1547                 CMD(probe_client, PROBE_CLIENT);
1548                 CMD(set_noack_map, SET_NOACK_MAP);
1549                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1550                         i++;
1551                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1552                                 goto nla_put_failure;
1553                 }
1554                 CMD(start_p2p_device, START_P2P_DEVICE);
1555                 CMD(set_mcast_rate, SET_MCAST_RATE);
1556 #ifdef CONFIG_NL80211_TESTMODE
1557                 CMD(testmode_cmd, TESTMODE);
1558 #endif
1559                 if (state->split) {
1560                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1561                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1562                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1563                                 CMD(channel_switch, CHANNEL_SWITCH);
1564                         CMD(set_qos_map, SET_QOS_MAP);
1565                         if (rdev->wiphy.features &
1566                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1567                                 CMD(add_tx_ts, ADD_TX_TS);
1568                 }
1569                 /* add into the if now */
1570 #undef CMD
1571
1572                 if (rdev->ops->connect || rdev->ops->auth) {
1573                         i++;
1574                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1575                                 goto nla_put_failure;
1576                 }
1577
1578                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1579                         i++;
1580                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1581                                 goto nla_put_failure;
1582                 }
1583
1584                 nla_nest_end(msg, nl_cmds);
1585                 state->split_start++;
1586                 if (state->split)
1587                         break;
1588         case 5:
1589                 if (rdev->ops->remain_on_channel &&
1590                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1591                     nla_put_u32(msg,
1592                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1593                                 rdev->wiphy.max_remain_on_channel_duration))
1594                         goto nla_put_failure;
1595
1596                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1597                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1598                         goto nla_put_failure;
1599
1600                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1601                         goto nla_put_failure;
1602                 state->split_start++;
1603                 if (state->split)
1604                         break;
1605         case 6:
1606 #ifdef CONFIG_PM
1607                 if (nl80211_send_wowlan(msg, rdev, state->split))
1608                         goto nla_put_failure;
1609                 state->split_start++;
1610                 if (state->split)
1611                         break;
1612 #else
1613                 state->split_start++;
1614 #endif
1615         case 7:
1616                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1617                                         rdev->wiphy.software_iftypes))
1618                         goto nla_put_failure;
1619
1620                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1621                                                    state->split))
1622                         goto nla_put_failure;
1623
1624                 state->split_start++;
1625                 if (state->split)
1626                         break;
1627         case 8:
1628                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1629                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1630                                 rdev->wiphy.ap_sme_capa))
1631                         goto nla_put_failure;
1632
1633                 features = rdev->wiphy.features;
1634                 /*
1635                  * We can only add the per-channel limit information if the
1636                  * dump is split, otherwise it makes it too big. Therefore
1637                  * only advertise it in that case.
1638                  */
1639                 if (state->split)
1640                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1641                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1642                         goto nla_put_failure;
1643
1644                 if (rdev->wiphy.ht_capa_mod_mask &&
1645                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1646                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1647                             rdev->wiphy.ht_capa_mod_mask))
1648                         goto nla_put_failure;
1649
1650                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1651                     rdev->wiphy.max_acl_mac_addrs &&
1652                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1653                                 rdev->wiphy.max_acl_mac_addrs))
1654                         goto nla_put_failure;
1655
1656                 /*
1657                  * Any information below this point is only available to
1658                  * applications that can deal with it being split. This
1659                  * helps ensure that newly added capabilities don't break
1660                  * older tools by overrunning their buffers.
1661                  *
1662                  * We still increment split_start so that in the split
1663                  * case we'll continue with more data in the next round,
1664                  * but break unconditionally so unsplit data stops here.
1665                  */
1666                 state->split_start++;
1667                 break;
1668         case 9:
1669                 if (rdev->wiphy.extended_capabilities &&
1670                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1671                              rdev->wiphy.extended_capabilities_len,
1672                              rdev->wiphy.extended_capabilities) ||
1673                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1674                              rdev->wiphy.extended_capabilities_len,
1675                              rdev->wiphy.extended_capabilities_mask)))
1676                         goto nla_put_failure;
1677
1678                 if (rdev->wiphy.vht_capa_mod_mask &&
1679                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1680                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1681                             rdev->wiphy.vht_capa_mod_mask))
1682                         goto nla_put_failure;
1683
1684                 state->split_start++;
1685                 break;
1686         case 10:
1687                 if (nl80211_send_coalesce(msg, rdev))
1688                         goto nla_put_failure;
1689
1690                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1691                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1692                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1693                         goto nla_put_failure;
1694
1695                 if (rdev->wiphy.max_ap_assoc_sta &&
1696                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1697                                 rdev->wiphy.max_ap_assoc_sta))
1698                         goto nla_put_failure;
1699
1700                 state->split_start++;
1701                 break;
1702         case 11:
1703                 if (rdev->wiphy.n_vendor_commands) {
1704                         const struct nl80211_vendor_cmd_info *info;
1705                         struct nlattr *nested;
1706
1707                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1708                         if (!nested)
1709                                 goto nla_put_failure;
1710
1711                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1712                                 info = &rdev->wiphy.vendor_commands[i].info;
1713                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1714                                         goto nla_put_failure;
1715                         }
1716                         nla_nest_end(msg, nested);
1717                 }
1718
1719                 if (rdev->wiphy.n_vendor_events) {
1720                         const struct nl80211_vendor_cmd_info *info;
1721                         struct nlattr *nested;
1722
1723                         nested = nla_nest_start(msg,
1724                                                 NL80211_ATTR_VENDOR_EVENTS);
1725                         if (!nested)
1726                                 goto nla_put_failure;
1727
1728                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1729                                 info = &rdev->wiphy.vendor_events[i];
1730                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1731                                         goto nla_put_failure;
1732                         }
1733                         nla_nest_end(msg, nested);
1734                 }
1735                 state->split_start++;
1736                 break;
1737         case 12:
1738                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1739                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1740                                rdev->wiphy.max_num_csa_counters))
1741                         goto nla_put_failure;
1742
1743                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1744                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1745                         goto nla_put_failure;
1746
1747                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1748                             sizeof(rdev->wiphy.ext_features),
1749                             rdev->wiphy.ext_features))
1750                         goto nla_put_failure;
1751
1752                 if (rdev->wiphy.bss_select_support) {
1753                         struct nlattr *nested;
1754                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1755
1756                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1757                         if (!nested)
1758                                 goto nla_put_failure;
1759
1760                         i = 0;
1761                         while (bss_select_support) {
1762                                 if ((bss_select_support & 1) &&
1763                                     nla_put_flag(msg, i))
1764                                         goto nla_put_failure;
1765                                 i++;
1766                                 bss_select_support >>= 1;
1767                         }
1768                         nla_nest_end(msg, nested);
1769                 }
1770
1771                 state->split_start++;
1772                 break;
1773         case 13:
1774                 if (rdev->wiphy.num_iftype_ext_capab &&
1775                     rdev->wiphy.iftype_ext_capab) {
1776                         struct nlattr *nested_ext_capab, *nested;
1777
1778                         nested = nla_nest_start(msg,
1779                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1780                         if (!nested)
1781                                 goto nla_put_failure;
1782
1783                         for (i = state->capa_start;
1784                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1785                                 const struct wiphy_iftype_ext_capab *capab;
1786
1787                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1788
1789                                 nested_ext_capab = nla_nest_start(msg, i);
1790                                 if (!nested_ext_capab ||
1791                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1792                                                 capab->iftype) ||
1793                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1794                                             capab->extended_capabilities_len,
1795                                             capab->extended_capabilities) ||
1796                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1797                                             capab->extended_capabilities_len,
1798                                             capab->extended_capabilities_mask))
1799                                         goto nla_put_failure;
1800
1801                                 nla_nest_end(msg, nested_ext_capab);
1802                                 if (state->split)
1803                                         break;
1804                         }
1805                         nla_nest_end(msg, nested);
1806                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1807                                 state->capa_start = i + 1;
1808                                 break;
1809                         }
1810                 }
1811
1812                 /* done */
1813                 state->split_start = 0;
1814                 break;
1815         }
1816  finish:
1817         genlmsg_end(msg, hdr);
1818         return 0;
1819
1820  nla_put_failure:
1821         genlmsg_cancel(msg, hdr);
1822         return -EMSGSIZE;
1823 }
1824
1825 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1826                                     struct netlink_callback *cb,
1827                                     struct nl80211_dump_wiphy_state *state)
1828 {
1829         struct nlattr **tb = nl80211_fam.attrbuf;
1830         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1831                               tb, nl80211_fam.maxattr, nl80211_policy);
1832         /* ignore parse errors for backward compatibility */
1833         if (ret)
1834                 return 0;
1835
1836         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1837         if (tb[NL80211_ATTR_WIPHY])
1838                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1839         if (tb[NL80211_ATTR_WDEV])
1840                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1841         if (tb[NL80211_ATTR_IFINDEX]) {
1842                 struct net_device *netdev;
1843                 struct cfg80211_registered_device *rdev;
1844                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1845
1846                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1847                 if (!netdev)
1848                         return -ENODEV;
1849                 if (netdev->ieee80211_ptr) {
1850                         rdev = wiphy_to_rdev(
1851                                 netdev->ieee80211_ptr->wiphy);
1852                         state->filter_wiphy = rdev->wiphy_idx;
1853                 }
1854         }
1855
1856         return 0;
1857 }
1858
1859 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1860 {
1861         int idx = 0, ret;
1862         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1863         struct cfg80211_registered_device *rdev;
1864
1865         rtnl_lock();
1866         if (!state) {
1867                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1868                 if (!state) {
1869                         rtnl_unlock();
1870                         return -ENOMEM;
1871                 }
1872                 state->filter_wiphy = -1;
1873                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1874                 if (ret) {
1875                         kfree(state);
1876                         rtnl_unlock();
1877                         return ret;
1878                 }
1879                 cb->args[0] = (long)state;
1880         }
1881
1882         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1883                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1884                         continue;
1885                 if (++idx <= state->start)
1886                         continue;
1887                 if (state->filter_wiphy != -1 &&
1888                     state->filter_wiphy != rdev->wiphy_idx)
1889                         continue;
1890                 /* attempt to fit multiple wiphy data chunks into the skb */
1891                 do {
1892                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1893                                                  skb,
1894                                                  NETLINK_CB(cb->skb).portid,
1895                                                  cb->nlh->nlmsg_seq,
1896                                                  NLM_F_MULTI, state);
1897                         if (ret < 0) {
1898                                 /*
1899                                  * If sending the wiphy data didn't fit (ENOBUFS
1900                                  * or EMSGSIZE returned), this SKB is still
1901                                  * empty (so it's not too big because another
1902                                  * wiphy dataset is already in the skb) and
1903                                  * we've not tried to adjust the dump allocation
1904                                  * yet ... then adjust the alloc size to be
1905                                  * bigger, and return 1 but with the empty skb.
1906                                  * This results in an empty message being RX'ed
1907                                  * in userspace, but that is ignored.
1908                                  *
1909                                  * We can then retry with the larger buffer.
1910                                  */
1911                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1912                                     !skb->len && !state->split &&
1913                                     cb->min_dump_alloc < 4096) {
1914                                         cb->min_dump_alloc = 4096;
1915                                         state->split_start = 0;
1916                                         rtnl_unlock();
1917                                         return 1;
1918                                 }
1919                                 idx--;
1920                                 break;
1921                         }
1922                 } while (state->split_start > 0);
1923                 break;
1924         }
1925         rtnl_unlock();
1926
1927         state->start = idx;
1928
1929         return skb->len;
1930 }
1931
1932 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1933 {
1934         kfree((void *)cb->args[0]);
1935         return 0;
1936 }
1937
1938 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1939 {
1940         struct sk_buff *msg;
1941         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1942         struct nl80211_dump_wiphy_state state = {};
1943
1944         msg = nlmsg_new(4096, GFP_KERNEL);
1945         if (!msg)
1946                 return -ENOMEM;
1947
1948         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1949                                info->snd_portid, info->snd_seq, 0,
1950                                &state) < 0) {
1951                 nlmsg_free(msg);
1952                 return -ENOBUFS;
1953         }
1954
1955         return genlmsg_reply(msg, info);
1956 }
1957
1958 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1959         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1960         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1961         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1962         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1963         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1964 };
1965
1966 static int parse_txq_params(struct nlattr *tb[],
1967                             struct ieee80211_txq_params *txq_params)
1968 {
1969         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1970             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1971             !tb[NL80211_TXQ_ATTR_AIFS])
1972                 return -EINVAL;
1973
1974         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1975         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1976         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1977         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1978         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1979
1980         if (txq_params->ac >= NL80211_NUM_ACS)
1981                 return -EINVAL;
1982
1983         return 0;
1984 }
1985
1986 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1987 {
1988         /*
1989          * You can only set the channel explicitly for WDS interfaces,
1990          * all others have their channel managed via their respective
1991          * "establish a connection" command (connect, join, ...)
1992          *
1993          * For AP/GO and mesh mode, the channel can be set with the
1994          * channel userspace API, but is only stored and passed to the
1995          * low-level driver when the AP starts or the mesh is joined.
1996          * This is for backward compatibility, userspace can also give
1997          * the channel in the start-ap or join-mesh commands instead.
1998          *
1999          * Monitors are special as they are normally slaved to
2000          * whatever else is going on, so they have their own special
2001          * operation to set the monitor channel if possible.
2002          */
2003         return !wdev ||
2004                 wdev->iftype == NL80211_IFTYPE_AP ||
2005                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2006                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2007                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2008 }
2009
2010 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2011                                  struct genl_info *info,
2012                                  struct cfg80211_chan_def *chandef)
2013 {
2014         u32 control_freq;
2015
2016         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2017                 return -EINVAL;
2018
2019         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2020
2021         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2022         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2023         chandef->center_freq1 = control_freq;
2024         chandef->center_freq2 = 0;
2025
2026         /* Primary channel not allowed */
2027         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2028                 return -EINVAL;
2029
2030         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2031                 enum nl80211_channel_type chantype;
2032
2033                 chantype = nla_get_u32(
2034                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2035
2036                 switch (chantype) {
2037                 case NL80211_CHAN_NO_HT:
2038                 case NL80211_CHAN_HT20:
2039                 case NL80211_CHAN_HT40PLUS:
2040                 case NL80211_CHAN_HT40MINUS:
2041                         cfg80211_chandef_create(chandef, chandef->chan,
2042                                                 chantype);
2043                         break;
2044                 default:
2045                         return -EINVAL;
2046                 }
2047         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2048                 chandef->width =
2049                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2050                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2051                         chandef->center_freq1 =
2052                                 nla_get_u32(
2053                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2054                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2055                         chandef->center_freq2 =
2056                                 nla_get_u32(
2057                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2058         }
2059
2060         if (!cfg80211_chandef_valid(chandef))
2061                 return -EINVAL;
2062
2063         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2064                                      IEEE80211_CHAN_DISABLED))
2065                 return -EINVAL;
2066
2067         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2068              chandef->width == NL80211_CHAN_WIDTH_10) &&
2069             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2070                 return -EINVAL;
2071
2072         return 0;
2073 }
2074
2075 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2076                                  struct net_device *dev,
2077                                  struct genl_info *info)
2078 {
2079         struct cfg80211_chan_def chandef;
2080         int result;
2081         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2082         struct wireless_dev *wdev = NULL;
2083
2084         if (dev)
2085                 wdev = dev->ieee80211_ptr;
2086         if (!nl80211_can_set_dev_channel(wdev))
2087                 return -EOPNOTSUPP;
2088         if (wdev)
2089                 iftype = wdev->iftype;
2090
2091         result = nl80211_parse_chandef(rdev, info, &chandef);
2092         if (result)
2093                 return result;
2094
2095         switch (iftype) {
2096         case NL80211_IFTYPE_AP:
2097         case NL80211_IFTYPE_P2P_GO:
2098                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2099                                                    iftype)) {
2100                         result = -EINVAL;
2101                         break;
2102                 }
2103                 if (wdev->beacon_interval) {
2104                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2105                             !(rdev->wiphy.features &
2106                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2107                                 result = -EBUSY;
2108                                 break;
2109                         }
2110
2111                         /* Only allow dynamic channel width changes */
2112                         if (chandef.chan != wdev->preset_chandef.chan) {
2113                                 result = -EBUSY;
2114                                 break;
2115                         }
2116                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2117                         if (result)
2118                                 break;
2119                 }
2120                 wdev->preset_chandef = chandef;
2121                 result = 0;
2122                 break;
2123         case NL80211_IFTYPE_MESH_POINT:
2124                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2125                 break;
2126         case NL80211_IFTYPE_MONITOR:
2127                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2128                 break;
2129         default:
2130                 result = -EINVAL;
2131         }
2132
2133         return result;
2134 }
2135
2136 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2137 {
2138         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2139         struct net_device *netdev = info->user_ptr[1];
2140
2141         return __nl80211_set_channel(rdev, netdev, info);
2142 }
2143
2144 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2145 {
2146         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2147         struct net_device *dev = info->user_ptr[1];
2148         struct wireless_dev *wdev = dev->ieee80211_ptr;
2149         const u8 *bssid;
2150
2151         if (!info->attrs[NL80211_ATTR_MAC])
2152                 return -EINVAL;
2153
2154         if (netif_running(dev))
2155                 return -EBUSY;
2156
2157         if (!rdev->ops->set_wds_peer)
2158                 return -EOPNOTSUPP;
2159
2160         if (wdev->iftype != NL80211_IFTYPE_WDS)
2161                 return -EOPNOTSUPP;
2162
2163         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2164         return rdev_set_wds_peer(rdev, dev, bssid);
2165 }
2166
2167 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2168 {
2169         struct cfg80211_registered_device *rdev;
2170         struct net_device *netdev = NULL;
2171         struct wireless_dev *wdev;
2172         int result = 0, rem_txq_params = 0;
2173         struct nlattr *nl_txq_params;
2174         u32 changed;
2175         u8 retry_short = 0, retry_long = 0;
2176         u32 frag_threshold = 0, rts_threshold = 0;
2177         u8 coverage_class = 0;
2178
2179         ASSERT_RTNL();
2180
2181         /*
2182          * Try to find the wiphy and netdev. Normally this
2183          * function shouldn't need the netdev, but this is
2184          * done for backward compatibility -- previously
2185          * setting the channel was done per wiphy, but now
2186          * it is per netdev. Previous userland like hostapd
2187          * also passed a netdev to set_wiphy, so that it is
2188          * possible to let that go to the right netdev!
2189          */
2190
2191         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2192                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2193
2194                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2195                 if (netdev && netdev->ieee80211_ptr)
2196                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2197                 else
2198                         netdev = NULL;
2199         }
2200
2201         if (!netdev) {
2202                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2203                                                   info->attrs);
2204                 if (IS_ERR(rdev))
2205                         return PTR_ERR(rdev);
2206                 wdev = NULL;
2207                 netdev = NULL;
2208                 result = 0;
2209         } else
2210                 wdev = netdev->ieee80211_ptr;
2211
2212         /*
2213          * end workaround code, by now the rdev is available
2214          * and locked, and wdev may or may not be NULL.
2215          */
2216
2217         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2218                 result = cfg80211_dev_rename(
2219                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2220
2221         if (result)
2222                 return result;
2223
2224         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2225                 struct ieee80211_txq_params txq_params;
2226                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2227
2228                 if (!rdev->ops->set_txq_params)
2229                         return -EOPNOTSUPP;
2230
2231                 if (!netdev)
2232                         return -EINVAL;
2233
2234                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2235                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2236                         return -EINVAL;
2237
2238                 if (!netif_running(netdev))
2239                         return -ENETDOWN;
2240
2241                 nla_for_each_nested(nl_txq_params,
2242                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2243                                     rem_txq_params) {
2244                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2245                                            nla_data(nl_txq_params),
2246                                            nla_len(nl_txq_params),
2247                                            txq_params_policy);
2248                         if (result)
2249                                 return result;
2250                         result = parse_txq_params(tb, &txq_params);
2251                         if (result)
2252                                 return result;
2253
2254                         result = rdev_set_txq_params(rdev, netdev,
2255                                                      &txq_params);
2256                         if (result)
2257                                 return result;
2258                 }
2259         }
2260
2261         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2262                 result = __nl80211_set_channel(
2263                         rdev,
2264                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2265                         info);
2266                 if (result)
2267                         return result;
2268         }
2269
2270         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2271                 struct wireless_dev *txp_wdev = wdev;
2272                 enum nl80211_tx_power_setting type;
2273                 int idx, mbm = 0;
2274
2275                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2276                         txp_wdev = NULL;
2277
2278                 if (!rdev->ops->set_tx_power)
2279                         return -EOPNOTSUPP;
2280
2281                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2282                 type = nla_get_u32(info->attrs[idx]);
2283
2284                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2285                     (type != NL80211_TX_POWER_AUTOMATIC))
2286                         return -EINVAL;
2287
2288                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2289                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2290                         mbm = nla_get_u32(info->attrs[idx]);
2291                 }
2292
2293                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2294                 if (result)
2295                         return result;
2296         }
2297
2298         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2299             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2300                 u32 tx_ant, rx_ant;
2301
2302                 if ((!rdev->wiphy.available_antennas_tx &&
2303                      !rdev->wiphy.available_antennas_rx) ||
2304                     !rdev->ops->set_antenna)
2305                         return -EOPNOTSUPP;
2306
2307                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2308                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2309
2310                 /* reject antenna configurations which don't match the
2311                  * available antenna masks, except for the "all" mask */
2312                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2313                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2314                         return -EINVAL;
2315
2316                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2317                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2318
2319                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2320                 if (result)
2321                         return result;
2322         }
2323
2324         changed = 0;
2325
2326         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2327                 retry_short = nla_get_u8(
2328                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2329                 if (retry_short == 0)
2330                         return -EINVAL;
2331
2332                 changed |= WIPHY_PARAM_RETRY_SHORT;
2333         }
2334
2335         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2336                 retry_long = nla_get_u8(
2337                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2338                 if (retry_long == 0)
2339                         return -EINVAL;
2340
2341                 changed |= WIPHY_PARAM_RETRY_LONG;
2342         }
2343
2344         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2345                 frag_threshold = nla_get_u32(
2346                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2347                 if (frag_threshold < 256)
2348                         return -EINVAL;
2349
2350                 if (frag_threshold != (u32) -1) {
2351                         /*
2352                          * Fragments (apart from the last one) are required to
2353                          * have even length. Make the fragmentation code
2354                          * simpler by stripping LSB should someone try to use
2355                          * odd threshold value.
2356                          */
2357                         frag_threshold &= ~0x1;
2358                 }
2359                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2360         }
2361
2362         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2363                 rts_threshold = nla_get_u32(
2364                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2365                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2366         }
2367
2368         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2369                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2370                         return -EINVAL;
2371
2372                 coverage_class = nla_get_u8(
2373                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2374                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2375         }
2376
2377         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2378                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2379                         return -EOPNOTSUPP;
2380
2381                 changed |= WIPHY_PARAM_DYN_ACK;
2382         }
2383
2384         if (changed) {
2385                 u8 old_retry_short, old_retry_long;
2386                 u32 old_frag_threshold, old_rts_threshold;
2387                 u8 old_coverage_class;
2388
2389                 if (!rdev->ops->set_wiphy_params)
2390                         return -EOPNOTSUPP;
2391
2392                 old_retry_short = rdev->wiphy.retry_short;
2393                 old_retry_long = rdev->wiphy.retry_long;
2394                 old_frag_threshold = rdev->wiphy.frag_threshold;
2395                 old_rts_threshold = rdev->wiphy.rts_threshold;
2396                 old_coverage_class = rdev->wiphy.coverage_class;
2397
2398                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2399                         rdev->wiphy.retry_short = retry_short;
2400                 if (changed & WIPHY_PARAM_RETRY_LONG)
2401                         rdev->wiphy.retry_long = retry_long;
2402                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2403                         rdev->wiphy.frag_threshold = frag_threshold;
2404                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2405                         rdev->wiphy.rts_threshold = rts_threshold;
2406                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2407                         rdev->wiphy.coverage_class = coverage_class;
2408
2409                 result = rdev_set_wiphy_params(rdev, changed);
2410                 if (result) {
2411                         rdev->wiphy.retry_short = old_retry_short;
2412                         rdev->wiphy.retry_long = old_retry_long;
2413                         rdev->wiphy.frag_threshold = old_frag_threshold;
2414                         rdev->wiphy.rts_threshold = old_rts_threshold;
2415                         rdev->wiphy.coverage_class = old_coverage_class;
2416                         return result;
2417                 }
2418         }
2419         return 0;
2420 }
2421
2422 static inline u64 wdev_id(struct wireless_dev *wdev)
2423 {
2424         return (u64)wdev->identifier |
2425                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2426 }
2427
2428 static int nl80211_send_chandef(struct sk_buff *msg,
2429                                 const struct cfg80211_chan_def *chandef)
2430 {
2431         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2432                 return -EINVAL;
2433
2434         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2435                         chandef->chan->center_freq))
2436                 return -ENOBUFS;
2437         switch (chandef->width) {
2438         case NL80211_CHAN_WIDTH_20_NOHT:
2439         case NL80211_CHAN_WIDTH_20:
2440         case NL80211_CHAN_WIDTH_40:
2441                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2442                                 cfg80211_get_chandef_type(chandef)))
2443                         return -ENOBUFS;
2444                 break;
2445         default:
2446                 break;
2447         }
2448         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2449                 return -ENOBUFS;
2450         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2451                 return -ENOBUFS;
2452         if (chandef->center_freq2 &&
2453             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2454                 return -ENOBUFS;
2455         return 0;
2456 }
2457
2458 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2459                               struct cfg80211_registered_device *rdev,
2460                               struct wireless_dev *wdev, bool removal)
2461 {
2462         struct net_device *dev = wdev->netdev;
2463         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2464         void *hdr;
2465
2466         if (removal)
2467                 cmd = NL80211_CMD_DEL_INTERFACE;
2468
2469         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2470         if (!hdr)
2471                 return -1;
2472
2473         if (dev &&
2474             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2475              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2476                 goto nla_put_failure;
2477
2478         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2479             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2480             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2481                               NL80211_ATTR_PAD) ||
2482             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2483             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2484                         rdev->devlist_generation ^
2485                         (cfg80211_rdev_list_generation << 2)))
2486                 goto nla_put_failure;
2487
2488         if (rdev->ops->get_channel) {
2489                 int ret;
2490                 struct cfg80211_chan_def chandef;
2491
2492                 ret = rdev_get_channel(rdev, wdev, &chandef);
2493                 if (ret == 0) {
2494                         if (nl80211_send_chandef(msg, &chandef))
2495                                 goto nla_put_failure;
2496                 }
2497         }
2498
2499         if (rdev->ops->get_tx_power) {
2500                 int dbm, ret;
2501
2502                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2503                 if (ret == 0 &&
2504                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2505                                 DBM_TO_MBM(dbm)))
2506                         goto nla_put_failure;
2507         }
2508
2509         if (wdev->ssid_len) {
2510                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2511                         goto nla_put_failure;
2512         }
2513
2514         genlmsg_end(msg, hdr);
2515         return 0;
2516
2517  nla_put_failure:
2518         genlmsg_cancel(msg, hdr);
2519         return -EMSGSIZE;
2520 }
2521
2522 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2523 {
2524         int wp_idx = 0;
2525         int if_idx = 0;
2526         int wp_start = cb->args[0];
2527         int if_start = cb->args[1];
2528         struct cfg80211_registered_device *rdev;
2529         struct wireless_dev *wdev;
2530
2531         rtnl_lock();
2532         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2533                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2534                         continue;
2535                 if (wp_idx < wp_start) {
2536                         wp_idx++;
2537                         continue;
2538                 }
2539                 if_idx = 0;
2540
2541                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2542                         if (if_idx < if_start) {
2543                                 if_idx++;
2544                                 continue;
2545                         }
2546                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2547                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2548                                                rdev, wdev, false) < 0) {
2549                                 goto out;
2550                         }
2551                         if_idx++;
2552                 }
2553
2554                 wp_idx++;
2555         }
2556  out:
2557         rtnl_unlock();
2558
2559         cb->args[0] = wp_idx;
2560         cb->args[1] = if_idx;
2561
2562         return skb->len;
2563 }
2564
2565 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2566 {
2567         struct sk_buff *msg;
2568         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2569         struct wireless_dev *wdev = info->user_ptr[1];
2570
2571         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2572         if (!msg)
2573                 return -ENOMEM;
2574
2575         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2576                                rdev, wdev, false) < 0) {
2577                 nlmsg_free(msg);
2578                 return -ENOBUFS;
2579         }
2580
2581         return genlmsg_reply(msg, info);
2582 }
2583
2584 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2585         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2586         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2587         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2588         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2589         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2590         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2591 };
2592
2593 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2594 {
2595         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2596         int flag;
2597
2598         *mntrflags = 0;
2599
2600         if (!nla)
2601                 return -EINVAL;
2602
2603         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2604                              nla, mntr_flags_policy))
2605                 return -EINVAL;
2606
2607         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2608                 if (flags[flag])
2609                         *mntrflags |= (1<<flag);
2610
2611         return 0;
2612 }
2613
2614 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2615                                struct net_device *netdev, u8 use_4addr,
2616                                enum nl80211_iftype iftype)
2617 {
2618         if (!use_4addr) {
2619                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2620                         return -EBUSY;
2621                 return 0;
2622         }
2623
2624         switch (iftype) {
2625         case NL80211_IFTYPE_AP_VLAN:
2626                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2627                         return 0;
2628                 break;
2629         case NL80211_IFTYPE_STATION:
2630                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2631                         return 0;
2632                 break;
2633         default:
2634                 break;
2635         }
2636
2637         return -EOPNOTSUPP;
2638 }
2639
2640 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2641 {
2642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2643         struct vif_params params;
2644         int err;
2645         enum nl80211_iftype otype, ntype;
2646         struct net_device *dev = info->user_ptr[1];
2647         u32 _flags, *flags = NULL;
2648         bool change = false;
2649
2650         memset(&params, 0, sizeof(params));
2651
2652         otype = ntype = dev->ieee80211_ptr->iftype;
2653
2654         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2655                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2656                 if (otype != ntype)
2657                         change = true;
2658                 if (ntype > NL80211_IFTYPE_MAX)
2659                         return -EINVAL;
2660         }
2661
2662         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2663                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2664
2665                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2666                         return -EINVAL;
2667                 if (netif_running(dev))
2668                         return -EBUSY;
2669
2670                 wdev_lock(wdev);
2671                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2672                              IEEE80211_MAX_MESH_ID_LEN);
2673                 wdev->mesh_id_up_len =
2674                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2675                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2676                        wdev->mesh_id_up_len);
2677                 wdev_unlock(wdev);
2678         }
2679
2680         if (info->attrs[NL80211_ATTR_4ADDR]) {
2681                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2682                 change = true;
2683                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2684                 if (err)
2685                         return err;
2686         } else {
2687                 params.use_4addr = -1;
2688         }
2689
2690         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2691                 if (ntype != NL80211_IFTYPE_MONITOR)
2692                         return -EINVAL;
2693                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2694                                           &_flags);
2695                 if (err)
2696                         return err;
2697
2698                 flags = &_flags;
2699                 change = true;
2700         }
2701
2702         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2703                 const u8 *mumimo_groups;
2704                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2705
2706                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2707                         return -EOPNOTSUPP;
2708
2709                 mumimo_groups =
2710                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2711
2712                 /* bits 0 and 63 are reserved and must be zero */
2713                 if ((mumimo_groups[0] & BIT(7)) ||
2714                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
2715                         return -EINVAL;
2716
2717                 memcpy(params.vht_mumimo_groups, mumimo_groups,
2718                        VHT_MUMIMO_GROUPS_DATA_LEN);
2719                 change = true;
2720         }
2721
2722         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2723                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2724
2725                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2726                         return -EOPNOTSUPP;
2727
2728                 nla_memcpy(params.macaddr,
2729                            info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR],
2730                            ETH_ALEN);
2731                 change = true;
2732         }
2733
2734         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2735             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2736                 return -EOPNOTSUPP;
2737
2738         if (change)
2739                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2740         else
2741                 err = 0;
2742
2743         if (!err && params.use_4addr != -1)
2744                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2745
2746         return err;
2747 }
2748
2749 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2750 {
2751         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2752         struct vif_params params;
2753         struct wireless_dev *wdev;
2754         struct sk_buff *msg, *event;
2755         int err;
2756         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2757         u32 flags;
2758
2759         /* to avoid failing a new interface creation due to pending removal */
2760         cfg80211_destroy_ifaces(rdev);
2761
2762         memset(&params, 0, sizeof(params));
2763
2764         if (!info->attrs[NL80211_ATTR_IFNAME])
2765                 return -EINVAL;
2766
2767         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2768                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2769                 if (type > NL80211_IFTYPE_MAX)
2770                         return -EINVAL;
2771         }
2772
2773         if (!rdev->ops->add_virtual_intf ||
2774             !(rdev->wiphy.interface_modes & (1 << type)))
2775                 return -EOPNOTSUPP;
2776
2777         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2778              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2779             info->attrs[NL80211_ATTR_MAC]) {
2780                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2781                            ETH_ALEN);
2782                 if (!is_valid_ether_addr(params.macaddr))
2783                         return -EADDRNOTAVAIL;
2784         }
2785
2786         if (info->attrs[NL80211_ATTR_4ADDR]) {
2787                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2788                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2789                 if (err)
2790                         return err;
2791         }
2792
2793         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2794                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2795                                   &flags);
2796
2797         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2798             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2799                 return -EOPNOTSUPP;
2800
2801         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2802         if (!msg)
2803                 return -ENOMEM;
2804
2805         wdev = rdev_add_virtual_intf(rdev,
2806                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2807                                 NET_NAME_USER, type, err ? NULL : &flags,
2808                                 &params);
2809         if (WARN_ON(!wdev)) {
2810                 nlmsg_free(msg);
2811                 return -EPROTO;
2812         } else if (IS_ERR(wdev)) {
2813                 nlmsg_free(msg);
2814                 return PTR_ERR(wdev);
2815         }
2816
2817         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2818                 wdev->owner_nlportid = info->snd_portid;
2819
2820         switch (type) {
2821         case NL80211_IFTYPE_MESH_POINT:
2822                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2823                         break;
2824                 wdev_lock(wdev);
2825                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2826                              IEEE80211_MAX_MESH_ID_LEN);
2827                 wdev->mesh_id_up_len =
2828                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2829                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2830                        wdev->mesh_id_up_len);
2831                 wdev_unlock(wdev);
2832                 break;
2833         case NL80211_IFTYPE_P2P_DEVICE:
2834                 /*
2835                  * P2P Device doesn't have a netdev, so doesn't go
2836                  * through the netdev notifier and must be added here
2837                  */
2838                 mutex_init(&wdev->mtx);
2839                 INIT_LIST_HEAD(&wdev->event_list);
2840                 spin_lock_init(&wdev->event_lock);
2841                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2842                 spin_lock_init(&wdev->mgmt_registrations_lock);
2843
2844                 wdev->identifier = ++rdev->wdev_id;
2845                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2846                 rdev->devlist_generation++;
2847                 break;
2848         default:
2849                 break;
2850         }
2851
2852         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2853                                rdev, wdev, false) < 0) {
2854                 nlmsg_free(msg);
2855                 return -ENOBUFS;
2856         }
2857
2858         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2859         if (event) {
2860                 if (nl80211_send_iface(event, 0, 0, 0,
2861                                        rdev, wdev, false) < 0) {
2862                         nlmsg_free(event);
2863                         goto out;
2864                 }
2865
2866                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2867                                         event, 0, NL80211_MCGRP_CONFIG,
2868                                         GFP_KERNEL);
2869         }
2870
2871 out:
2872         return genlmsg_reply(msg, info);
2873 }
2874
2875 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2876 {
2877         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2878         struct wireless_dev *wdev = info->user_ptr[1];
2879         struct sk_buff *msg;
2880         int status;
2881
2882         if (!rdev->ops->del_virtual_intf)
2883                 return -EOPNOTSUPP;
2884
2885         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2886         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2887                 nlmsg_free(msg);
2888                 msg = NULL;
2889         }
2890
2891         /*
2892          * If we remove a wireless device without a netdev then clear
2893          * user_ptr[1] so that nl80211_post_doit won't dereference it
2894          * to check if it needs to do dev_put(). Otherwise it crashes
2895          * since the wdev has been freed, unlike with a netdev where
2896          * we need the dev_put() for the netdev to really be freed.
2897          */
2898         if (!wdev->netdev)
2899                 info->user_ptr[1] = NULL;
2900
2901         status = rdev_del_virtual_intf(rdev, wdev);
2902         if (status >= 0 && msg)
2903                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2904                                         msg, 0, NL80211_MCGRP_CONFIG,
2905                                         GFP_KERNEL);
2906         else
2907                 nlmsg_free(msg);
2908
2909         return status;
2910 }
2911
2912 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2913 {
2914         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2915         struct net_device *dev = info->user_ptr[1];
2916         u16 noack_map;
2917
2918         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2919                 return -EINVAL;
2920
2921         if (!rdev->ops->set_noack_map)
2922                 return -EOPNOTSUPP;
2923
2924         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2925
2926         return rdev_set_noack_map(rdev, dev, noack_map);
2927 }
2928
2929 struct get_key_cookie {
2930         struct sk_buff *msg;
2931         int error;
2932         int idx;
2933 };
2934
2935 static void get_key_callback(void *c, struct key_params *params)
2936 {
2937         struct nlattr *key;
2938         struct get_key_cookie *cookie = c;
2939
2940         if ((params->key &&
2941              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2942                      params->key_len, params->key)) ||
2943             (params->seq &&
2944              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2945                      params->seq_len, params->seq)) ||
2946             (params->cipher &&
2947              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2948                          params->cipher)))
2949                 goto nla_put_failure;
2950
2951         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2952         if (!key)
2953                 goto nla_put_failure;
2954
2955         if ((params->key &&
2956              nla_put(cookie->msg, NL80211_KEY_DATA,
2957                      params->key_len, params->key)) ||
2958             (params->seq &&
2959              nla_put(cookie->msg, NL80211_KEY_SEQ,
2960                      params->seq_len, params->seq)) ||
2961             (params->cipher &&
2962              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2963                          params->cipher)))
2964                 goto nla_put_failure;
2965
2966         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2967                 goto nla_put_failure;
2968
2969         nla_nest_end(cookie->msg, key);
2970
2971         return;
2972  nla_put_failure:
2973         cookie->error = 1;
2974 }
2975
2976 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2977 {
2978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2979         int err;
2980         struct net_device *dev = info->user_ptr[1];
2981         u8 key_idx = 0;
2982         const u8 *mac_addr = NULL;
2983         bool pairwise;
2984         struct get_key_cookie cookie = {
2985                 .error = 0,
2986         };
2987         void *hdr;
2988         struct sk_buff *msg;
2989
2990         if (info->attrs[NL80211_ATTR_KEY_IDX])
2991                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2992
2993         if (key_idx > 5)
2994                 return -EINVAL;
2995
2996         if (info->attrs[NL80211_ATTR_MAC])
2997                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2998
2999         pairwise = !!mac_addr;
3000         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3001                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3002
3003                 if (kt >= NUM_NL80211_KEYTYPES)
3004                         return -EINVAL;
3005                 if (kt != NL80211_KEYTYPE_GROUP &&
3006                     kt != NL80211_KEYTYPE_PAIRWISE)
3007                         return -EINVAL;
3008                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3009         }
3010
3011         if (!rdev->ops->get_key)
3012                 return -EOPNOTSUPP;
3013
3014         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3015                 return -ENOENT;
3016
3017         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3018         if (!msg)
3019                 return -ENOMEM;
3020
3021         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3022                              NL80211_CMD_NEW_KEY);
3023         if (!hdr)
3024                 goto nla_put_failure;
3025
3026         cookie.msg = msg;
3027         cookie.idx = key_idx;
3028
3029         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3030             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3031                 goto nla_put_failure;
3032         if (mac_addr &&
3033             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3034                 goto nla_put_failure;
3035
3036         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3037                            get_key_callback);
3038
3039         if (err)
3040                 goto free_msg;
3041
3042         if (cookie.error)
3043                 goto nla_put_failure;
3044
3045         genlmsg_end(msg, hdr);
3046         return genlmsg_reply(msg, info);
3047
3048  nla_put_failure:
3049         err = -ENOBUFS;
3050  free_msg:
3051         nlmsg_free(msg);
3052         return err;
3053 }
3054
3055 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3056 {
3057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3058         struct key_parse key;
3059         int err;
3060         struct net_device *dev = info->user_ptr[1];
3061
3062         err = nl80211_parse_key(info, &key);
3063         if (err)
3064                 return err;
3065
3066         if (key.idx < 0)
3067                 return -EINVAL;
3068
3069         /* only support setting default key */
3070         if (!key.def && !key.defmgmt)
3071                 return -EINVAL;
3072
3073         wdev_lock(dev->ieee80211_ptr);
3074
3075         if (key.def) {
3076                 if (!rdev->ops->set_default_key) {
3077                         err = -EOPNOTSUPP;
3078                         goto out;
3079                 }
3080
3081                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3082                 if (err)
3083                         goto out;
3084
3085                 err = rdev_set_default_key(rdev, dev, key.idx,
3086                                                  key.def_uni, key.def_multi);
3087
3088                 if (err)
3089                         goto out;
3090
3091 #ifdef CONFIG_CFG80211_WEXT
3092                 dev->ieee80211_ptr->wext.default_key = key.idx;
3093 #endif
3094         } else {
3095                 if (key.def_uni || !key.def_multi) {
3096                         err = -EINVAL;
3097                         goto out;
3098                 }
3099
3100                 if (!rdev->ops->set_default_mgmt_key) {
3101                         err = -EOPNOTSUPP;
3102                         goto out;
3103                 }
3104
3105                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3106                 if (err)
3107                         goto out;
3108
3109                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3110                 if (err)
3111                         goto out;
3112
3113 #ifdef CONFIG_CFG80211_WEXT
3114                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3115 #endif
3116         }
3117
3118  out:
3119         wdev_unlock(dev->ieee80211_ptr);
3120
3121         return err;
3122 }
3123
3124 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3125 {
3126         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3127         int err;
3128         struct net_device *dev = info->user_ptr[1];
3129         struct key_parse key;
3130         const u8 *mac_addr = NULL;
3131
3132         err = nl80211_parse_key(info, &key);
3133         if (err)
3134                 return err;
3135
3136         if (!key.p.key)
3137                 return -EINVAL;
3138
3139         if (info->attrs[NL80211_ATTR_MAC])
3140                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3141
3142         if (key.type == -1) {
3143                 if (mac_addr)
3144                         key.type = NL80211_KEYTYPE_PAIRWISE;
3145                 else
3146                         key.type = NL80211_KEYTYPE_GROUP;
3147         }
3148
3149         /* for now */
3150         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3151             key.type != NL80211_KEYTYPE_GROUP)
3152                 return -EINVAL;
3153
3154         if (!rdev->ops->add_key)
3155                 return -EOPNOTSUPP;
3156
3157         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3158                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3159                                            mac_addr))
3160                 return -EINVAL;
3161
3162         wdev_lock(dev->ieee80211_ptr);
3163         err = nl80211_key_allowed(dev->ieee80211_ptr);
3164         if (!err)
3165                 err = rdev_add_key(rdev, dev, key.idx,
3166                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3167                                     mac_addr, &key.p);
3168         wdev_unlock(dev->ieee80211_ptr);
3169
3170         return err;
3171 }
3172
3173 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3174 {
3175         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3176         int err;
3177         struct net_device *dev = info->user_ptr[1];
3178         u8 *mac_addr = NULL;
3179         struct key_parse key;
3180
3181         err = nl80211_parse_key(info, &key);
3182         if (err)
3183                 return err;
3184
3185         if (info->attrs[NL80211_ATTR_MAC])
3186                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3187
3188         if (key.type == -1) {
3189                 if (mac_addr)
3190                         key.type = NL80211_KEYTYPE_PAIRWISE;
3191                 else
3192                         key.type = NL80211_KEYTYPE_GROUP;
3193         }
3194
3195         /* for now */
3196         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3197             key.type != NL80211_KEYTYPE_GROUP)
3198                 return -EINVAL;
3199
3200         if (!rdev->ops->del_key)
3201                 return -EOPNOTSUPP;
3202
3203         wdev_lock(dev->ieee80211_ptr);
3204         err = nl80211_key_allowed(dev->ieee80211_ptr);
3205
3206         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3207             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3208                 err = -ENOENT;
3209
3210         if (!err)
3211                 err = rdev_del_key(rdev, dev, key.idx,
3212                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3213                                    mac_addr);
3214
3215 #ifdef CONFIG_CFG80211_WEXT
3216         if (!err) {
3217                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3218                         dev->ieee80211_ptr->wext.default_key = -1;
3219                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3220                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3221         }
3222 #endif
3223         wdev_unlock(dev->ieee80211_ptr);
3224
3225         return err;
3226 }
3227
3228 /* This function returns an error or the number of nested attributes */
3229 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3230 {
3231         struct nlattr *attr;
3232         int n_entries = 0, tmp;
3233
3234         nla_for_each_nested(attr, nl_attr, tmp) {
3235                 if (nla_len(attr) != ETH_ALEN)
3236                         return -EINVAL;
3237
3238                 n_entries++;
3239         }
3240
3241         return n_entries;
3242 }
3243
3244 /*
3245  * This function parses ACL information and allocates memory for ACL data.
3246  * On successful return, the calling function is responsible to free the
3247  * ACL buffer returned by this function.
3248  */
3249 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3250                                                 struct genl_info *info)
3251 {
3252         enum nl80211_acl_policy acl_policy;
3253         struct nlattr *attr;
3254         struct cfg80211_acl_data *acl;
3255         int i = 0, n_entries, tmp;
3256
3257         if (!wiphy->max_acl_mac_addrs)
3258                 return ERR_PTR(-EOPNOTSUPP);
3259
3260         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3261                 return ERR_PTR(-EINVAL);
3262
3263         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3264         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3265             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3266                 return ERR_PTR(-EINVAL);
3267
3268         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3269                 return ERR_PTR(-EINVAL);
3270
3271         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3272         if (n_entries < 0)
3273                 return ERR_PTR(n_entries);
3274
3275         if (n_entries > wiphy->max_acl_mac_addrs)
3276                 return ERR_PTR(-ENOTSUPP);
3277
3278         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3279                       GFP_KERNEL);
3280         if (!acl)
3281                 return ERR_PTR(-ENOMEM);
3282
3283         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3284                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3285                 i++;
3286         }
3287
3288         acl->n_acl_entries = n_entries;
3289         acl->acl_policy = acl_policy;
3290
3291         return acl;
3292 }
3293
3294 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3295 {
3296         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3297         struct net_device *dev = info->user_ptr[1];
3298         struct cfg80211_acl_data *acl;
3299         int err;
3300
3301         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3303                 return -EOPNOTSUPP;
3304
3305         if (!dev->ieee80211_ptr->beacon_interval)
3306                 return -EINVAL;
3307
3308         acl = parse_acl_data(&rdev->wiphy, info);
3309         if (IS_ERR(acl))
3310                 return PTR_ERR(acl);
3311
3312         err = rdev_set_mac_acl(rdev, dev, acl);
3313
3314         kfree(acl);
3315
3316         return err;
3317 }
3318
3319 static int nl80211_parse_beacon(struct nlattr *attrs[],
3320                                 struct cfg80211_beacon_data *bcn)
3321 {
3322         bool haveinfo = false;
3323
3324         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3325             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3326             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3327             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3328                 return -EINVAL;
3329
3330         memset(bcn, 0, sizeof(*bcn));
3331
3332         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3333                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3334                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3335                 if (!bcn->head_len)
3336                         return -EINVAL;
3337                 haveinfo = true;
3338         }
3339
3340         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3341                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3342                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3343                 haveinfo = true;
3344         }
3345
3346         if (!haveinfo)
3347                 return -EINVAL;
3348
3349         if (attrs[NL80211_ATTR_IE]) {
3350                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3351                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3352         }
3353
3354         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3355                 bcn->proberesp_ies =
3356                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3357                 bcn->proberesp_ies_len =
3358                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3359         }
3360
3361         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3362                 bcn->assocresp_ies =
3363                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3364                 bcn->assocresp_ies_len =
3365                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3366         }
3367
3368         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3369                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3370                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3371         }
3372
3373         return 0;
3374 }
3375
3376 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3377                                    struct cfg80211_ap_settings *params)
3378 {
3379         struct wireless_dev *wdev;
3380         bool ret = false;
3381
3382         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3383                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3384                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3385                         continue;
3386
3387                 if (!wdev->preset_chandef.chan)
3388                         continue;
3389
3390                 params->chandef = wdev->preset_chandef;
3391                 ret = true;
3392                 break;
3393         }
3394
3395         return ret;
3396 }
3397
3398 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3399                                     enum nl80211_auth_type auth_type,
3400                                     enum nl80211_commands cmd)
3401 {
3402         if (auth_type > NL80211_AUTHTYPE_MAX)
3403                 return false;
3404
3405         switch (cmd) {
3406         case NL80211_CMD_AUTHENTICATE:
3407                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3408                     auth_type == NL80211_AUTHTYPE_SAE)
3409                         return false;
3410                 return true;
3411         case NL80211_CMD_CONNECT:
3412         case NL80211_CMD_START_AP:
3413                 /* SAE not supported yet */
3414                 if (auth_type == NL80211_AUTHTYPE_SAE)
3415                         return false;
3416                 return true;
3417         default:
3418                 return false;
3419         }
3420 }
3421
3422 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3423 {
3424         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3425         struct net_device *dev = info->user_ptr[1];
3426         struct wireless_dev *wdev = dev->ieee80211_ptr;
3427         struct cfg80211_ap_settings params;
3428         int err;
3429
3430         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3431             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3432                 return -EOPNOTSUPP;
3433
3434         if (!rdev->ops->start_ap)
3435                 return -EOPNOTSUPP;
3436
3437         if (wdev->beacon_interval)
3438                 return -EALREADY;
3439
3440         memset(&params, 0, sizeof(params));
3441
3442         /* these are required for START_AP */
3443         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3444             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3445             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3446                 return -EINVAL;
3447
3448         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3449         if (err)
3450                 return err;
3451
3452         params.beacon_interval =
3453                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3454         params.dtim_period =
3455                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3456
3457         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3458         if (err)
3459                 return err;
3460
3461         /*
3462          * In theory, some of these attributes should be required here
3463          * but since they were not used when the command was originally
3464          * added, keep them optional for old user space programs to let
3465          * them continue to work with drivers that do not need the
3466          * additional information -- drivers must check!
3467          */
3468         if (info->attrs[NL80211_ATTR_SSID]) {
3469                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3470                 params.ssid_len =
3471                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3472                 if (params.ssid_len == 0 ||
3473                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3474                         return -EINVAL;
3475         }
3476
3477         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3478                 params.hidden_ssid = nla_get_u32(
3479                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3480                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3481                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3482                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3483                         return -EINVAL;
3484         }
3485
3486         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3487
3488         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3489                 params.auth_type = nla_get_u32(
3490                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3491                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3492                                              NL80211_CMD_START_AP))
3493                         return -EINVAL;
3494         } else
3495                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3496
3497         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3498                                       NL80211_MAX_NR_CIPHER_SUITES);
3499         if (err)
3500                 return err;
3501
3502         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3503                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3504                         return -EOPNOTSUPP;
3505                 params.inactivity_timeout = nla_get_u16(
3506                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3507         }
3508
3509         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3510                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3511                         return -EINVAL;
3512                 params.p2p_ctwindow =
3513                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3514                 if (params.p2p_ctwindow > 127)
3515                         return -EINVAL;
3516                 if (params.p2p_ctwindow != 0 &&
3517                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3518                         return -EINVAL;
3519         }
3520
3521         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3522                 u8 tmp;
3523
3524                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3525                         return -EINVAL;
3526                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3527                 if (tmp > 1)
3528                         return -EINVAL;
3529                 params.p2p_opp_ps = tmp;
3530                 if (params.p2p_opp_ps != 0 &&
3531                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3532                         return -EINVAL;
3533         }
3534
3535         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3536                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3537                 if (err)
3538                         return err;
3539         } else if (wdev->preset_chandef.chan) {
3540                 params.chandef = wdev->preset_chandef;
3541         } else if (!nl80211_get_ap_channel(rdev, &params))
3542                 return -EINVAL;
3543
3544         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3545                                            wdev->iftype))
3546                 return -EINVAL;
3547
3548         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3549                 params.smps_mode =
3550                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3551                 switch (params.smps_mode) {
3552                 case NL80211_SMPS_OFF:
3553                         break;
3554                 case NL80211_SMPS_STATIC:
3555                         if (!(rdev->wiphy.features &
3556                               NL80211_FEATURE_STATIC_SMPS))
3557                                 return -EINVAL;
3558                         break;
3559                 case NL80211_SMPS_DYNAMIC:
3560                         if (!(rdev->wiphy.features &
3561                               NL80211_FEATURE_DYNAMIC_SMPS))
3562                                 return -EINVAL;
3563                         break;
3564                 default:
3565                         return -EINVAL;
3566                 }
3567         } else {
3568                 params.smps_mode = NL80211_SMPS_OFF;
3569         }
3570
3571         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3572         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3573                 return -EOPNOTSUPP;
3574
3575         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3576                 params.acl = parse_acl_data(&rdev->wiphy, info);
3577                 if (IS_ERR(params.acl))
3578                         return PTR_ERR(params.acl);
3579         }
3580
3581         wdev_lock(wdev);
3582         err = rdev_start_ap(rdev, dev, &params);
3583         if (!err) {
3584                 wdev->preset_chandef = params.chandef;
3585                 wdev->beacon_interval = params.beacon_interval;
3586                 wdev->chandef = params.chandef;
3587                 wdev->ssid_len = params.ssid_len;
3588                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3589         }
3590         wdev_unlock(wdev);
3591
3592         kfree(params.acl);
3593
3594         return err;
3595 }
3596
3597 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3598 {
3599         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3600         struct net_device *dev = info->user_ptr[1];
3601         struct wireless_dev *wdev = dev->ieee80211_ptr;
3602         struct cfg80211_beacon_data params;
3603         int err;
3604
3605         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3606             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3607                 return -EOPNOTSUPP;
3608
3609         if (!rdev->ops->change_beacon)
3610                 return -EOPNOTSUPP;
3611
3612         if (!wdev->beacon_interval)
3613                 return -EINVAL;
3614
3615         err = nl80211_parse_beacon(info->attrs, &params);
3616         if (err)
3617                 return err;
3618
3619         wdev_lock(wdev);
3620         err = rdev_change_beacon(rdev, dev, &params);
3621         wdev_unlock(wdev);
3622
3623         return err;
3624 }
3625
3626 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3627 {
3628         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3629         struct net_device *dev = info->user_ptr[1];
3630
3631         return cfg80211_stop_ap(rdev, dev, false);
3632 }
3633
3634 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3635         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3636         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3637         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3638         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3639         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3640         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3641 };
3642
3643 static int parse_station_flags(struct genl_info *info,
3644                                enum nl80211_iftype iftype,
3645                                struct station_parameters *params)
3646 {
3647         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3648         struct nlattr *nla;
3649         int flag;
3650
3651         /*
3652          * Try parsing the new attribute first so userspace
3653          * can specify both for older kernels.
3654          */
3655         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3656         if (nla) {
3657                 struct nl80211_sta_flag_update *sta_flags;
3658
3659                 sta_flags = nla_data(nla);
3660                 params->sta_flags_mask = sta_flags->mask;
3661                 params->sta_flags_set = sta_flags->set;
3662                 params->sta_flags_set &= params->sta_flags_mask;
3663                 if ((params->sta_flags_mask |
3664                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3665                         return -EINVAL;
3666                 return 0;
3667         }
3668
3669         /* if present, parse the old attribute */
3670
3671         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3672         if (!nla)
3673                 return 0;
3674
3675         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3676                              nla, sta_flags_policy))
3677                 return -EINVAL;
3678
3679         /*
3680          * Only allow certain flags for interface types so that
3681          * other attributes are silently ignored. Remember that
3682          * this is backward compatibility code with old userspace
3683          * and shouldn't be hit in other cases anyway.
3684          */
3685         switch (iftype) {
3686         case NL80211_IFTYPE_AP:
3687         case NL80211_IFTYPE_AP_VLAN:
3688         case NL80211_IFTYPE_P2P_GO:
3689                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3690                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3691                                          BIT(NL80211_STA_FLAG_WME) |
3692                                          BIT(NL80211_STA_FLAG_MFP);
3693                 break;
3694         case NL80211_IFTYPE_P2P_CLIENT:
3695         case NL80211_IFTYPE_STATION:
3696                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3697                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3698                 break;
3699         case NL80211_IFTYPE_MESH_POINT:
3700                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3701                                          BIT(NL80211_STA_FLAG_MFP) |
3702                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3703         default:
3704                 return -EINVAL;
3705         }
3706
3707         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3708                 if (flags[flag]) {
3709                         params->sta_flags_set |= (1<<flag);
3710
3711                         /* no longer support new API additions in old API */
3712                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3713                                 return -EINVAL;
3714                 }
3715         }
3716
3717         return 0;
3718 }
3719
3720 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3721                                  int attr)
3722 {
3723         struct nlattr *rate;
3724         u32 bitrate;
3725         u16 bitrate_compat;
3726         enum nl80211_attrs rate_flg;
3727
3728         rate = nla_nest_start(msg, attr);
3729         if (!rate)
3730                 return false;
3731
3732         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3733         bitrate = cfg80211_calculate_bitrate(info);
3734         /* report 16-bit bitrate only if we can */
3735         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3736         if (bitrate > 0 &&
3737             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3738                 return false;
3739         if (bitrate_compat > 0 &&
3740             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3741                 return false;
3742
3743         switch (info->bw) {
3744         case RATE_INFO_BW_5:
3745                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3746                 break;
3747         case RATE_INFO_BW_10:
3748                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3749                 break;
3750         default:
3751                 WARN_ON(1);
3752                 /* fall through */
3753         case RATE_INFO_BW_20:
3754                 rate_flg = 0;
3755                 break;
3756         case RATE_INFO_BW_40:
3757                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3758                 break;
3759         case RATE_INFO_BW_80:
3760                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3761                 break;
3762         case RATE_INFO_BW_160:
3763                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3764                 break;
3765         }
3766
3767         if (rate_flg && nla_put_flag(msg, rate_flg))
3768                 return false;
3769
3770         if (info->flags & RATE_INFO_FLAGS_MCS) {
3771                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3772                         return false;
3773                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3774                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3775                         return false;
3776         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3777                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3778                         return false;
3779                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3780                         return false;
3781                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3782                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3783                         return false;
3784         }
3785
3786         nla_nest_end(msg, rate);
3787         return true;
3788 }
3789
3790 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3791                                int id)
3792 {
3793         void *attr;
3794         int i = 0;
3795
3796         if (!mask)
3797                 return true;
3798
3799         attr = nla_nest_start(msg, id);
3800         if (!attr)
3801                 return false;
3802
3803         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3804                 if (!(mask & BIT(i)))
3805                         continue;
3806
3807                 if (nla_put_u8(msg, i, signal[i]))
3808                         return false;
3809         }
3810
3811         nla_nest_end(msg, attr);
3812
3813         return true;
3814 }
3815
3816 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3817                                 u32 seq, int flags,
3818                                 struct cfg80211_registered_device *rdev,
3819                                 struct net_device *dev,
3820                                 const u8 *mac_addr, struct station_info *sinfo)
3821 {
3822         void *hdr;
3823         struct nlattr *sinfoattr, *bss_param;
3824
3825         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3826         if (!hdr)
3827                 return -1;
3828
3829         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3830             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3831             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3832                 goto nla_put_failure;
3833
3834         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3835         if (!sinfoattr)
3836                 goto nla_put_failure;
3837
3838 #define PUT_SINFO(attr, memb, type) do {                                \
3839         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
3840         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3841             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3842                              sinfo->memb))                              \
3843                 goto nla_put_failure;                                   \
3844         } while (0)
3845 #define PUT_SINFO_U64(attr, memb) do {                                  \
3846         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3847             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
3848                               sinfo->memb, NL80211_STA_INFO_PAD))       \
3849                 goto nla_put_failure;                                   \
3850         } while (0)
3851
3852         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3853         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3854
3855         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3856                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3857             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3858                         (u32)sinfo->rx_bytes))
3859                 goto nla_put_failure;
3860
3861         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3862                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3863             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3864                         (u32)sinfo->tx_bytes))
3865                 goto nla_put_failure;
3866
3867         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3868         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3869         PUT_SINFO(LLID, llid, u16);
3870         PUT_SINFO(PLID, plid, u16);
3871         PUT_SINFO(PLINK_STATE, plink_state, u8);
3872         PUT_SINFO_U64(RX_DURATION, rx_duration);
3873
3874         switch (rdev->wiphy.signal_type) {
3875         case CFG80211_SIGNAL_TYPE_MBM:
3876                 PUT_SINFO(SIGNAL, signal, u8);
3877                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3878                 break;
3879         default:
3880                 break;
3881         }
3882         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3883                 if (!nl80211_put_signal(msg, sinfo->chains,
3884                                         sinfo->chain_signal,
3885                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3886                         goto nla_put_failure;
3887         }
3888         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3889                 if (!nl80211_put_signal(msg, sinfo->chains,
3890                                         sinfo->chain_signal_avg,
3891                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3892                         goto nla_put_failure;
3893         }
3894         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3895                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3896                                           NL80211_STA_INFO_TX_BITRATE))
3897                         goto nla_put_failure;
3898         }
3899         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3900                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3901                                           NL80211_STA_INFO_RX_BITRATE))
3902                         goto nla_put_failure;
3903         }
3904
3905         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3906         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3907         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3908         PUT_SINFO(TX_FAILED, tx_failed, u32);
3909         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3910         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3911         PUT_SINFO(LOCAL_PM, local_pm, u32);
3912         PUT_SINFO(PEER_PM, peer_pm, u32);
3913         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3914
3915         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3916                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3917                 if (!bss_param)
3918                         goto nla_put_failure;
3919
3920                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3921                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3922                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3923                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3924                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3925                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3926                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3927                                sinfo->bss_param.dtim_period) ||
3928                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3929                                 sinfo->bss_param.beacon_interval))
3930                         goto nla_put_failure;
3931
3932                 nla_nest_end(msg, bss_param);
3933         }
3934         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3935             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3936                     sizeof(struct nl80211_sta_flag_update),
3937                     &sinfo->sta_flags))
3938                 goto nla_put_failure;
3939
3940         PUT_SINFO_U64(T_OFFSET, t_offset);
3941         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3942         PUT_SINFO_U64(BEACON_RX, rx_beacon);
3943         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3944
3945 #undef PUT_SINFO
3946 #undef PUT_SINFO_U64
3947
3948         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3949                 struct nlattr *tidsattr;
3950                 int tid;
3951
3952                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3953                 if (!tidsattr)
3954                         goto nla_put_failure;
3955
3956                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3957                         struct cfg80211_tid_stats *tidstats;
3958                         struct nlattr *tidattr;
3959
3960                         tidstats = &sinfo->pertid[tid];
3961
3962                         if (!tidstats->filled)
3963                                 continue;
3964
3965                         tidattr = nla_nest_start(msg, tid + 1);
3966                         if (!tidattr)
3967                                 goto nla_put_failure;
3968
3969 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
3970         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3971             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
3972                               tidstats->memb, NL80211_TID_STATS_PAD))   \
3973                 goto nla_put_failure;                                   \
3974         } while (0)
3975
3976                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
3977                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
3978                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
3979                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
3980
3981 #undef PUT_TIDVAL_U64
3982                         nla_nest_end(msg, tidattr);
3983                 }
3984
3985                 nla_nest_end(msg, tidsattr);
3986         }
3987
3988         nla_nest_end(msg, sinfoattr);
3989
3990         if (sinfo->assoc_req_ies_len &&
3991             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3992                     sinfo->assoc_req_ies))
3993                 goto nla_put_failure;
3994
3995         genlmsg_end(msg, hdr);
3996         return 0;
3997
3998  nla_put_failure:
3999         genlmsg_cancel(msg, hdr);
4000         return -EMSGSIZE;
4001 }
4002
4003 static int nl80211_dump_station(struct sk_buff *skb,
4004                                 struct netlink_callback *cb)
4005 {
4006         struct station_info sinfo;
4007         struct cfg80211_registered_device *rdev;
4008         struct wireless_dev *wdev;
4009         u8 mac_addr[ETH_ALEN];
4010         int sta_idx = cb->args[2];
4011         int err;
4012
4013         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4014         if (err)
4015                 return err;
4016
4017         if (!wdev->netdev) {
4018                 err = -EINVAL;
4019                 goto out_err;
4020         }
4021
4022         if (!rdev->ops->dump_station) {
4023                 err = -EOPNOTSUPP;
4024                 goto out_err;
4025         }
4026
4027         while (1) {
4028                 memset(&sinfo, 0, sizeof(sinfo));
4029                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4030                                         mac_addr, &sinfo);
4031                 if (err == -ENOENT)
4032                         break;
4033                 if (err)
4034                         goto out_err;
4035
4036                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4037                                 NETLINK_CB(cb->skb).portid,
4038                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4039                                 rdev, wdev->netdev, mac_addr,
4040                                 &sinfo) < 0)
4041                         goto out;
4042
4043                 sta_idx++;
4044         }
4045
4046  out:
4047         cb->args[2] = sta_idx;
4048         err = skb->len;
4049  out_err:
4050         nl80211_finish_wdev_dump(rdev);
4051
4052         return err;
4053 }
4054
4055 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4056 {
4057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4058         struct net_device *dev = info->user_ptr[1];
4059         struct station_info sinfo;
4060         struct sk_buff *msg;
4061         u8 *mac_addr = NULL;
4062         int err;
4063
4064         memset(&sinfo, 0, sizeof(sinfo));
4065
4066         if (!info->attrs[NL80211_ATTR_MAC])
4067                 return -EINVAL;
4068
4069         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4070
4071         if (!rdev->ops->get_station)
4072                 return -EOPNOTSUPP;
4073
4074         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4075         if (err)
4076                 return err;
4077
4078         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4079         if (!msg)
4080                 return -ENOMEM;
4081
4082         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4083                                  info->snd_portid, info->snd_seq, 0,
4084                                  rdev, dev, mac_addr, &sinfo) < 0) {
4085                 nlmsg_free(msg);
4086                 return -ENOBUFS;
4087         }
4088
4089         return genlmsg_reply(msg, info);
4090 }
4091
4092 int cfg80211_check_station_change(struct wiphy *wiphy,
4093                                   struct station_parameters *params,
4094                                   enum cfg80211_station_type statype)
4095 {
4096         if (params->listen_interval != -1 &&
4097             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4098                 return -EINVAL;
4099
4100         if (params->support_p2p_ps != -1 &&
4101             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4102                 return -EINVAL;
4103
4104         if (params->aid &&
4105             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4106             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4107                 return -EINVAL;
4108
4109         /* When you run into this, adjust the code below for the new flag */
4110         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4111
4112         switch (statype) {
4113         case CFG80211_STA_MESH_PEER_KERNEL:
4114         case CFG80211_STA_MESH_PEER_USER:
4115                 /*
4116                  * No ignoring the TDLS flag here -- the userspace mesh
4117                  * code doesn't have the bug of including TDLS in the
4118                  * mask everywhere.
4119                  */
4120                 if (params->sta_flags_mask &
4121                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4122                                   BIT(NL80211_STA_FLAG_MFP) |
4123                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4124                         return -EINVAL;
4125                 break;
4126         case CFG80211_STA_TDLS_PEER_SETUP:
4127         case CFG80211_STA_TDLS_PEER_ACTIVE:
4128                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4129                         return -EINVAL;
4130                 /* ignore since it can't change */
4131                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4132                 break;
4133         default:
4134                 /* disallow mesh-specific things */
4135                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4136                         return -EINVAL;
4137                 if (params->local_pm)
4138                         return -EINVAL;
4139                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4140                         return -EINVAL;
4141         }
4142
4143         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4144             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4145                 /* TDLS can't be set, ... */
4146                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4147                         return -EINVAL;
4148                 /*
4149                  * ... but don't bother the driver with it. This works around
4150                  * a hostapd/wpa_supplicant issue -- it always includes the
4151                  * TLDS_PEER flag in the mask even for AP mode.
4152                  */
4153                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4154         }
4155
4156         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4157             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4158                 /* reject other things that can't change */
4159                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4160                         return -EINVAL;
4161                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4162                         return -EINVAL;
4163                 if (params->supported_rates)
4164                         return -EINVAL;
4165                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4166                         return -EINVAL;
4167         }
4168
4169         if (statype != CFG80211_STA_AP_CLIENT &&
4170             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4171                 if (params->vlan)
4172                         return -EINVAL;
4173         }
4174
4175         switch (statype) {
4176         case CFG80211_STA_AP_MLME_CLIENT:
4177                 /* Use this only for authorizing/unauthorizing a station */
4178                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4179                         return -EOPNOTSUPP;
4180                 break;
4181         case CFG80211_STA_AP_CLIENT:
4182         case CFG80211_STA_AP_CLIENT_UNASSOC:
4183                 /* accept only the listed bits */
4184                 if (params->sta_flags_mask &
4185                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4186                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4187                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4188                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4189                                   BIT(NL80211_STA_FLAG_WME) |
4190                                   BIT(NL80211_STA_FLAG_MFP)))
4191                         return -EINVAL;
4192
4193                 /* but authenticated/associated only if driver handles it */
4194                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4195                     params->sta_flags_mask &
4196                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4197                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4198                         return -EINVAL;
4199                 break;
4200         case CFG80211_STA_IBSS:
4201         case CFG80211_STA_AP_STA:
4202                 /* reject any changes other than AUTHORIZED */
4203                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4204                         return -EINVAL;
4205                 break;
4206         case CFG80211_STA_TDLS_PEER_SETUP:
4207                 /* reject any changes other than AUTHORIZED or WME */
4208                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4209                                                BIT(NL80211_STA_FLAG_WME)))
4210                         return -EINVAL;
4211                 /* force (at least) rates when authorizing */
4212                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4213                     !params->supported_rates)
4214                         return -EINVAL;
4215                 break;
4216         case CFG80211_STA_TDLS_PEER_ACTIVE:
4217                 /* reject any changes */
4218                 return -EINVAL;
4219         case CFG80211_STA_MESH_PEER_KERNEL:
4220                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4221                         return -EINVAL;
4222                 break;
4223         case CFG80211_STA_MESH_PEER_USER:
4224                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4225                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4226                         return -EINVAL;
4227                 break;
4228         }
4229
4230         return 0;
4231 }
4232 EXPORT_SYMBOL(cfg80211_check_station_change);
4233
4234 /*
4235  * Get vlan interface making sure it is running and on the right wiphy.
4236  */
4237 static struct net_device *get_vlan(struct genl_info *info,
4238                                    struct cfg80211_registered_device *rdev)
4239 {
4240         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4241         struct net_device *v;
4242         int ret;
4243
4244         if (!vlanattr)
4245                 return NULL;
4246
4247         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4248         if (!v)
4249                 return ERR_PTR(-ENODEV);
4250
4251         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4252                 ret = -EINVAL;
4253                 goto error;
4254         }
4255
4256         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4257             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4258             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4259                 ret = -EINVAL;
4260                 goto error;
4261         }
4262
4263         if (!netif_running(v)) {
4264                 ret = -ENETDOWN;
4265                 goto error;
4266         }
4267
4268         return v;
4269  error:
4270         dev_put(v);
4271         return ERR_PTR(ret);
4272 }
4273
4274 static const struct nla_policy
4275 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4276         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4277         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4278 };
4279
4280 static int nl80211_parse_sta_wme(struct genl_info *info,
4281                                  struct station_parameters *params)
4282 {
4283         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4284         struct nlattr *nla;
4285         int err;
4286
4287         /* parse WME attributes if present */
4288         if (!info->attrs[NL80211_ATTR_STA_WME])
4289                 return 0;
4290
4291         nla = info->attrs[NL80211_ATTR_STA_WME];
4292         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4293                                nl80211_sta_wme_policy);
4294         if (err)
4295                 return err;
4296
4297         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4298                 params->uapsd_queues = nla_get_u8(
4299                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4300         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4301                 return -EINVAL;
4302
4303         if (tb[NL80211_STA_WME_MAX_SP])
4304                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4305
4306         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4307                 return -EINVAL;
4308
4309         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4310
4311         return 0;
4312 }
4313
4314 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4315                                       struct station_parameters *params)
4316 {
4317         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4318                 params->supported_channels =
4319                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4320                 params->supported_channels_len =
4321                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4322                 /*
4323                  * Need to include at least one (first channel, number of
4324                  * channels) tuple for each subband, and must have proper
4325                  * tuples for the rest of the data as well.
4326                  */
4327                 if (params->supported_channels_len < 2)
4328                         return -EINVAL;
4329                 if (params->supported_channels_len % 2)
4330                         return -EINVAL;
4331         }
4332
4333         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4334                 params->supported_oper_classes =
4335                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4336                 params->supported_oper_classes_len =
4337                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4338                 /*
4339                  * The value of the Length field of the Supported Operating
4340                  * Classes element is between 2 and 253.
4341                  */
4342                 if (params->supported_oper_classes_len < 2 ||
4343                     params->supported_oper_classes_len > 253)
4344                         return -EINVAL;
4345         }
4346         return 0;
4347 }
4348
4349 static int nl80211_set_station_tdls(struct genl_info *info,
4350                                     struct station_parameters *params)
4351 {
4352         int err;
4353         /* Dummy STA entry gets updated once the peer capabilities are known */
4354         if (info->attrs[NL80211_ATTR_PEER_AID])
4355                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4356         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4357                 params->ht_capa =
4358                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4359         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4360                 params->vht_capa =
4361                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4362
4363         err = nl80211_parse_sta_channel_info(info, params);
4364         if (err)
4365                 return err;
4366
4367         return nl80211_parse_sta_wme(info, params);
4368 }
4369
4370 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4371 {
4372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4373         struct net_device *dev = info->user_ptr[1];
4374         struct station_parameters params;
4375         u8 *mac_addr;
4376         int err;
4377
4378         memset(&params, 0, sizeof(params));
4379
4380         if (!rdev->ops->change_station)
4381                 return -EOPNOTSUPP;
4382
4383         /*
4384          * AID and listen_interval properties can be set only for unassociated
4385          * station. Include these parameters here and will check them in
4386          * cfg80211_check_station_change().
4387          */
4388         if (info->attrs[NL80211_ATTR_STA_AID])
4389                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4390
4391         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4392                 params.listen_interval =
4393                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4394         else
4395                 params.listen_interval = -1;
4396
4397         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4398                 u8 tmp;
4399
4400                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4401                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4402                         return -EINVAL;
4403
4404                 params.support_p2p_ps = tmp;
4405         } else {
4406                 params.support_p2p_ps = -1;
4407         }
4408
4409         if (!info->attrs[NL80211_ATTR_MAC])
4410                 return -EINVAL;
4411
4412         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4413
4414         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4415                 params.supported_rates =
4416                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4417                 params.supported_rates_len =
4418                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4419         }
4420
4421         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4422                 params.capability =
4423                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4424                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4425         }
4426
4427         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4428                 params.ext_capab =
4429                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4430                 params.ext_capab_len =
4431                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4432         }
4433
4434         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4435                 return -EINVAL;
4436
4437         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4438                 params.plink_action =
4439                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4440                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4441                         return -EINVAL;
4442         }
4443
4444         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4445                 params.plink_state =
4446                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4447                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4448                         return -EINVAL;
4449                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4450                         params.peer_aid = nla_get_u16(
4451                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4452                         if (params.peer_aid > IEEE80211_MAX_AID)
4453                                 return -EINVAL;
4454                 }
4455                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4456         }
4457
4458         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4459                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4460                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4461
4462                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4463                     pm > NL80211_MESH_POWER_MAX)
4464                         return -EINVAL;
4465
4466                 params.local_pm = pm;
4467         }
4468
4469         /* Include parameters for TDLS peer (will check later) */
4470         err = nl80211_set_station_tdls(info, &params);
4471         if (err)
4472                 return err;
4473
4474         params.vlan = get_vlan(info, rdev);
4475         if (IS_ERR(params.vlan))
4476                 return PTR_ERR(params.vlan);
4477
4478         switch (dev->ieee80211_ptr->iftype) {
4479         case NL80211_IFTYPE_AP:
4480         case NL80211_IFTYPE_AP_VLAN:
4481         case NL80211_IFTYPE_P2P_GO:
4482         case NL80211_IFTYPE_P2P_CLIENT:
4483         case NL80211_IFTYPE_STATION:
4484         case NL80211_IFTYPE_ADHOC:
4485         case NL80211_IFTYPE_MESH_POINT:
4486                 break;
4487         default:
4488                 err = -EOPNOTSUPP;
4489                 goto out_put_vlan;
4490         }
4491
4492         /* driver will call cfg80211_check_station_change() */
4493         err = rdev_change_station(rdev, dev, mac_addr, &params);
4494
4495  out_put_vlan:
4496         if (params.vlan)
4497                 dev_put(params.vlan);
4498
4499         return err;
4500 }
4501
4502 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4503 {
4504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4505         int err;
4506         struct net_device *dev = info->user_ptr[1];
4507         struct station_parameters params;
4508         u8 *mac_addr = NULL;
4509         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4510                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4511
4512         memset(&params, 0, sizeof(params));
4513
4514         if (!rdev->ops->add_station)
4515                 return -EOPNOTSUPP;
4516
4517         if (!info->attrs[NL80211_ATTR_MAC])
4518                 return -EINVAL;
4519
4520         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4521                 return -EINVAL;
4522
4523         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4524                 return -EINVAL;
4525
4526         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4527             !info->attrs[NL80211_ATTR_PEER_AID])
4528                 return -EINVAL;
4529
4530         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4531         params.supported_rates =
4532                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4533         params.supported_rates_len =
4534                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4535         params.listen_interval =
4536                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4537
4538         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4539                 u8 tmp;
4540
4541                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4542                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4543                         return -EINVAL;
4544
4545                 params.support_p2p_ps = tmp;
4546         } else {
4547                 /*
4548                  * if not specified, assume it's supported for P2P GO interface,
4549                  * and is NOT supported for AP interface
4550                  */
4551                 params.support_p2p_ps =
4552                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4553         }
4554
4555         if (info->attrs[NL80211_ATTR_PEER_AID])
4556                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4557         else
4558                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4559         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4560                 return -EINVAL;
4561
4562         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4563                 params.capability =
4564                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4565                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4566         }
4567
4568         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4569                 params.ext_capab =
4570                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4571                 params.ext_capab_len =
4572                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4573         }
4574
4575         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4576                 params.ht_capa =
4577                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4578
4579         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4580                 params.vht_capa =
4581                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4582
4583         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4584                 params.opmode_notif_used = true;
4585                 params.opmode_notif =
4586                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4587         }
4588
4589         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4590                 params.plink_action =
4591                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4592                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4593                         return -EINVAL;
4594         }
4595
4596         err = nl80211_parse_sta_channel_info(info, &params);
4597         if (err)
4598                 return err;
4599
4600         err = nl80211_parse_sta_wme(info, &params);
4601         if (err)
4602                 return err;
4603
4604         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4605                 return -EINVAL;
4606
4607         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4608          * as userspace might just pass through the capabilities from the IEs
4609          * directly, rather than enforcing this restriction and returning an
4610          * error in this case.
4611          */
4612         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4613                 params.ht_capa = NULL;
4614                 params.vht_capa = NULL;
4615         }
4616
4617         /* When you run into this, adjust the code below for the new flag */
4618         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4619
4620         switch (dev->ieee80211_ptr->iftype) {
4621         case NL80211_IFTYPE_AP:
4622         case NL80211_IFTYPE_AP_VLAN:
4623         case NL80211_IFTYPE_P2P_GO:
4624                 /* ignore WME attributes if iface/sta is not capable */
4625                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4626                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4627                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4628
4629                 /* TDLS peers cannot be added */
4630                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4631                     info->attrs[NL80211_ATTR_PEER_AID])
4632                         return -EINVAL;
4633                 /* but don't bother the driver with it */
4634                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4635
4636                 /* allow authenticated/associated only if driver handles it */
4637                 if (!(rdev->wiphy.features &
4638                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4639                     params.sta_flags_mask & auth_assoc)
4640                         return -EINVAL;
4641
4642                 /* Older userspace, or userspace wanting to be compatible with
4643                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4644                  * and assoc flags in the mask, but assumes the station will be
4645                  * added as associated anyway since this was the required driver
4646                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4647                  * introduced.
4648                  * In order to not bother drivers with this quirk in the API
4649                  * set the flags in both the mask and set for new stations in
4650                  * this case.
4651                  */
4652                 if (!(params.sta_flags_mask & auth_assoc)) {
4653                         params.sta_flags_mask |= auth_assoc;
4654                         params.sta_flags_set |= auth_assoc;
4655                 }
4656
4657                 /* must be last in here for error handling */
4658                 params.vlan = get_vlan(info, rdev);
4659                 if (IS_ERR(params.vlan))
4660                         return PTR_ERR(params.vlan);
4661                 break;
4662         case NL80211_IFTYPE_MESH_POINT:
4663                 /* ignore uAPSD data */
4664                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4665
4666                 /* associated is disallowed */
4667                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4668                         return -EINVAL;
4669                 /* TDLS peers cannot be added */
4670                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4671                     info->attrs[NL80211_ATTR_PEER_AID])
4672                         return -EINVAL;
4673                 break;
4674         case NL80211_IFTYPE_STATION:
4675         case NL80211_IFTYPE_P2P_CLIENT:
4676                 /* ignore uAPSD data */
4677                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4678
4679                 /* these are disallowed */
4680                 if (params.sta_flags_mask &
4681                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4682                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4683                         return -EINVAL;
4684                 /* Only TDLS peers can be added */
4685                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4686                         return -EINVAL;
4687                 /* Can only add if TDLS ... */
4688                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4689                         return -EOPNOTSUPP;
4690                 /* ... with external setup is supported */
4691                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4692                         return -EOPNOTSUPP;
4693                 /*
4694                  * Older wpa_supplicant versions always mark the TDLS peer
4695                  * as authorized, but it shouldn't yet be.
4696                  */
4697                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4698                 break;
4699         default:
4700                 return -EOPNOTSUPP;
4701         }
4702
4703         /* be aware of params.vlan when changing code here */
4704
4705         err = rdev_add_station(rdev, dev, mac_addr, &params);
4706
4707         if (params.vlan)
4708                 dev_put(params.vlan);
4709         return err;
4710 }
4711
4712 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4713 {
4714         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4715         struct net_device *dev = info->user_ptr[1];
4716         struct station_del_parameters params;
4717
4718         memset(&params, 0, sizeof(params));
4719
4720         if (info->attrs[NL80211_ATTR_MAC])
4721                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4722
4723         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4724             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4725             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4726             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4727                 return -EINVAL;
4728
4729         if (!rdev->ops->del_station)
4730                 return -EOPNOTSUPP;
4731
4732         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4733                 params.subtype =
4734                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4735                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4736                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4737                         return -EINVAL;
4738         } else {
4739                 /* Default to Deauthentication frame */
4740                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4741         }
4742
4743         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4744                 params.reason_code =
4745                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4746                 if (params.reason_code == 0)
4747                         return -EINVAL; /* 0 is reserved */
4748         } else {
4749                 /* Default to reason code 2 */
4750                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4751         }
4752
4753         return rdev_del_station(rdev, dev, &params);
4754 }
4755
4756 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4757                                 int flags, struct net_device *dev,
4758                                 u8 *dst, u8 *next_hop,
4759                                 struct mpath_info *pinfo)
4760 {
4761         void *hdr;
4762         struct nlattr *pinfoattr;
4763
4764         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4765         if (!hdr)
4766                 return -1;
4767
4768         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4769             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4770             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4771             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4772                 goto nla_put_failure;
4773
4774         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4775         if (!pinfoattr)
4776                 goto nla_put_failure;
4777         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4778             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4779                         pinfo->frame_qlen))
4780                 goto nla_put_failure;
4781         if (((pinfo->filled & MPATH_INFO_SN) &&
4782              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4783             ((pinfo->filled & MPATH_INFO_METRIC) &&
4784              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4785                          pinfo->metric)) ||
4786             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4787              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4788                          pinfo->exptime)) ||
4789             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4790              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4791                         pinfo->flags)) ||
4792             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4793              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4794                          pinfo->discovery_timeout)) ||
4795             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4796              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4797                         pinfo->discovery_retries)))
4798                 goto nla_put_failure;
4799
4800         nla_nest_end(msg, pinfoattr);
4801
4802         genlmsg_end(msg, hdr);
4803         return 0;
4804
4805  nla_put_failure:
4806         genlmsg_cancel(msg, hdr);
4807         return -EMSGSIZE;
4808 }
4809
4810 static int nl80211_dump_mpath(struct sk_buff *skb,
4811                               struct netlink_callback *cb)
4812 {
4813         struct mpath_info pinfo;
4814         struct cfg80211_registered_device *rdev;
4815         struct wireless_dev *wdev;
4816         u8 dst[ETH_ALEN];
4817         u8 next_hop[ETH_ALEN];
4818         int path_idx = cb->args[2];
4819         int err;
4820
4821         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4822         if (err)
4823                 return err;
4824
4825         if (!rdev->ops->dump_mpath) {
4826                 err = -EOPNOTSUPP;
4827                 goto out_err;
4828         }
4829
4830         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4831                 err = -EOPNOTSUPP;
4832                 goto out_err;
4833         }
4834
4835         while (1) {
4836                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4837                                       next_hop, &pinfo);
4838                 if (err == -ENOENT)
4839                         break;
4840                 if (err)
4841                         goto out_err;
4842
4843                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4844                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4845                                        wdev->netdev, dst, next_hop,
4846                                        &pinfo) < 0)
4847                         goto out;
4848
4849                 path_idx++;
4850         }
4851
4852  out:
4853         cb->args[2] = path_idx;
4854         err = skb->len;
4855  out_err:
4856         nl80211_finish_wdev_dump(rdev);
4857         return err;
4858 }
4859
4860 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4861 {
4862         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4863         int err;
4864         struct net_device *dev = info->user_ptr[1];
4865         struct mpath_info pinfo;
4866         struct sk_buff *msg;
4867         u8 *dst = NULL;
4868         u8 next_hop[ETH_ALEN];
4869
4870         memset(&pinfo, 0, sizeof(pinfo));
4871
4872         if (!info->attrs[NL80211_ATTR_MAC])
4873                 return -EINVAL;
4874
4875         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4876
4877         if (!rdev->ops->get_mpath)
4878                 return -EOPNOTSUPP;
4879
4880         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4881                 return -EOPNOTSUPP;
4882
4883         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4884         if (err)
4885                 return err;
4886
4887         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4888         if (!msg)
4889                 return -ENOMEM;
4890
4891         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4892                                  dev, dst, next_hop, &pinfo) < 0) {
4893                 nlmsg_free(msg);
4894                 return -ENOBUFS;
4895         }
4896
4897         return genlmsg_reply(msg, info);
4898 }
4899
4900 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4901 {
4902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4903         struct net_device *dev = info->user_ptr[1];
4904         u8 *dst = NULL;
4905         u8 *next_hop = NULL;
4906
4907         if (!info->attrs[NL80211_ATTR_MAC])
4908                 return -EINVAL;
4909
4910         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4911                 return -EINVAL;
4912
4913         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4914         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4915
4916         if (!rdev->ops->change_mpath)
4917                 return -EOPNOTSUPP;
4918
4919         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4920                 return -EOPNOTSUPP;
4921
4922         return rdev_change_mpath(rdev, dev, dst, next_hop);
4923 }
4924
4925 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4926 {
4927         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4928         struct net_device *dev = info->user_ptr[1];
4929         u8 *dst = NULL;
4930         u8 *next_hop = NULL;
4931
4932         if (!info->attrs[NL80211_ATTR_MAC])
4933                 return -EINVAL;
4934
4935         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4936                 return -EINVAL;
4937
4938         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4939         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4940
4941         if (!rdev->ops->add_mpath)
4942                 return -EOPNOTSUPP;
4943
4944         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4945                 return -EOPNOTSUPP;
4946
4947         return rdev_add_mpath(rdev, dev, dst, next_hop);
4948 }
4949
4950 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4951 {
4952         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4953         struct net_device *dev = info->user_ptr[1];
4954         u8 *dst = NULL;
4955
4956         if (info->attrs[NL80211_ATTR_MAC])
4957                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4958
4959         if (!rdev->ops->del_mpath)
4960                 return -EOPNOTSUPP;
4961
4962         return rdev_del_mpath(rdev, dev, dst);
4963 }
4964
4965 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4966 {
4967         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4968         int err;
4969         struct net_device *dev = info->user_ptr[1];
4970         struct mpath_info pinfo;
4971         struct sk_buff *msg;
4972         u8 *dst = NULL;
4973         u8 mpp[ETH_ALEN];
4974
4975         memset(&pinfo, 0, sizeof(pinfo));
4976
4977         if (!info->attrs[NL80211_ATTR_MAC])
4978                 return -EINVAL;
4979
4980         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4981
4982         if (!rdev->ops->get_mpp)
4983                 return -EOPNOTSUPP;
4984
4985         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4986                 return -EOPNOTSUPP;
4987
4988         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4989         if (err)
4990                 return err;
4991
4992         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4993         if (!msg)
4994                 return -ENOMEM;
4995
4996         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4997                                dev, dst, mpp, &pinfo) < 0) {
4998                 nlmsg_free(msg);
4999                 return -ENOBUFS;
5000         }
5001
5002         return genlmsg_reply(msg, info);
5003 }
5004
5005 static int nl80211_dump_mpp(struct sk_buff *skb,
5006                             struct netlink_callback *cb)
5007 {
5008         struct mpath_info pinfo;
5009         struct cfg80211_registered_device *rdev;
5010         struct wireless_dev *wdev;
5011         u8 dst[ETH_ALEN];
5012         u8 mpp[ETH_ALEN];
5013         int path_idx = cb->args[2];
5014         int err;
5015
5016         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5017         if (err)
5018                 return err;
5019
5020         if (!rdev->ops->dump_mpp) {
5021                 err = -EOPNOTSUPP;
5022                 goto out_err;
5023         }
5024
5025         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5026                 err = -EOPNOTSUPP;
5027                 goto out_err;
5028         }
5029
5030         while (1) {
5031                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5032                                     mpp, &pinfo);
5033                 if (err == -ENOENT)
5034                         break;
5035                 if (err)
5036                         goto out_err;
5037
5038                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5039                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5040                                        wdev->netdev, dst, mpp,
5041                                        &pinfo) < 0)
5042                         goto out;
5043
5044                 path_idx++;
5045         }
5046
5047  out:
5048         cb->args[2] = path_idx;
5049         err = skb->len;
5050  out_err:
5051         nl80211_finish_wdev_dump(rdev);
5052         return err;
5053 }
5054
5055 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5056 {
5057         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5058         struct net_device *dev = info->user_ptr[1];
5059         struct wireless_dev *wdev = dev->ieee80211_ptr;
5060         struct bss_parameters params;
5061         int err;
5062
5063         memset(&params, 0, sizeof(params));
5064         /* default to not changing parameters */
5065         params.use_cts_prot = -1;
5066         params.use_short_preamble = -1;
5067         params.use_short_slot_time = -1;
5068         params.ap_isolate = -1;
5069         params.ht_opmode = -1;
5070         params.p2p_ctwindow = -1;
5071         params.p2p_opp_ps = -1;
5072
5073         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5074                 params.use_cts_prot =
5075                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5076         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5077                 params.use_short_preamble =
5078                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5079         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5080                 params.use_short_slot_time =
5081                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5082         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5083                 params.basic_rates =
5084                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5085                 params.basic_rates_len =
5086                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5087         }
5088         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5089                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5090         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5091                 params.ht_opmode =
5092                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5093
5094         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5095                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5096                         return -EINVAL;
5097                 params.p2p_ctwindow =
5098                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5099                 if (params.p2p_ctwindow < 0)
5100                         return -EINVAL;
5101                 if (params.p2p_ctwindow != 0 &&
5102                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5103                         return -EINVAL;
5104         }
5105
5106         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5107                 u8 tmp;
5108
5109                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5110                         return -EINVAL;
5111                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5112                 if (tmp > 1)
5113                         return -EINVAL;
5114                 params.p2p_opp_ps = tmp;
5115                 if (params.p2p_opp_ps &&
5116                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5117                         return -EINVAL;
5118         }
5119
5120         if (!rdev->ops->change_bss)
5121                 return -EOPNOTSUPP;
5122
5123         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5124             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5125                 return -EOPNOTSUPP;
5126
5127         wdev_lock(wdev);
5128         err = rdev_change_bss(rdev, dev, &params);
5129         wdev_unlock(wdev);
5130
5131         return err;
5132 }
5133
5134 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5135 {
5136         char *data = NULL;
5137         bool is_indoor;
5138         enum nl80211_user_reg_hint_type user_reg_hint_type;
5139         u32 owner_nlportid;
5140
5141         /*
5142          * You should only get this when cfg80211 hasn't yet initialized
5143          * completely when built-in to the kernel right between the time
5144          * window between nl80211_init() and regulatory_init(), if that is
5145          * even possible.
5146          */
5147         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5148                 return -EINPROGRESS;
5149
5150         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5151                 user_reg_hint_type =
5152                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5153         else
5154                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5155
5156         switch (user_reg_hint_type) {
5157         case NL80211_USER_REG_HINT_USER:
5158         case NL80211_USER_REG_HINT_CELL_BASE:
5159                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5160                         return -EINVAL;
5161
5162                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5163                 return regulatory_hint_user(data, user_reg_hint_type);
5164         case NL80211_USER_REG_HINT_INDOOR:
5165                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5166                         owner_nlportid = info->snd_portid;
5167                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5168                 } else {
5169                         owner_nlportid = 0;
5170                         is_indoor = true;
5171                 }
5172
5173                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5174         default:
5175                 return -EINVAL;
5176         }
5177 }
5178
5179 static int nl80211_get_mesh_config(struct sk_buff *skb,
5180                                    struct genl_info *info)
5181 {
5182         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5183         struct net_device *dev = info->user_ptr[1];
5184         struct wireless_dev *wdev = dev->ieee80211_ptr;
5185         struct mesh_config cur_params;
5186         int err = 0;
5187         void *hdr;
5188         struct nlattr *pinfoattr;
5189         struct sk_buff *msg;
5190
5191         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5192                 return -EOPNOTSUPP;
5193
5194         if (!rdev->ops->get_mesh_config)
5195                 return -EOPNOTSUPP;
5196
5197         wdev_lock(wdev);
5198         /* If not connected, get default parameters */
5199         if (!wdev->mesh_id_len)
5200                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5201         else
5202                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5203         wdev_unlock(wdev);
5204
5205         if (err)
5206                 return err;
5207
5208         /* Draw up a netlink message to send back */
5209         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5210         if (!msg)
5211                 return -ENOMEM;
5212         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5213                              NL80211_CMD_GET_MESH_CONFIG);
5214         if (!hdr)
5215                 goto out;
5216         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5217         if (!pinfoattr)
5218                 goto nla_put_failure;
5219         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5220             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5221                         cur_params.dot11MeshRetryTimeout) ||
5222             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5223                         cur_params.dot11MeshConfirmTimeout) ||
5224             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5225                         cur_params.dot11MeshHoldingTimeout) ||
5226             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5227                         cur_params.dot11MeshMaxPeerLinks) ||
5228             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5229                        cur_params.dot11MeshMaxRetries) ||
5230             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5231                        cur_params.dot11MeshTTL) ||
5232             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5233                        cur_params.element_ttl) ||
5234             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5235                        cur_params.auto_open_plinks) ||
5236             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5237                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5238             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5239                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5240             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5241                         cur_params.path_refresh_time) ||
5242             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5243                         cur_params.min_discovery_timeout) ||
5244             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5245                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5246             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5247                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5248             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5249                         cur_params.dot11MeshHWMPperrMinInterval) ||
5250             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5251                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5252             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5253                        cur_params.dot11MeshHWMPRootMode) ||
5254             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5255                         cur_params.dot11MeshHWMPRannInterval) ||
5256             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5257                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5258             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5259                        cur_params.dot11MeshForwarding) ||
5260             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5261                         cur_params.rssi_threshold) ||
5262             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5263                         cur_params.ht_opmode) ||
5264             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5265                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5266             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5267                         cur_params.dot11MeshHWMProotInterval) ||
5268             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5269                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5270             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5271                         cur_params.power_mode) ||
5272             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5273                         cur_params.dot11MeshAwakeWindowDuration) ||
5274             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5275                         cur_params.plink_timeout))
5276                 goto nla_put_failure;
5277         nla_nest_end(msg, pinfoattr);
5278         genlmsg_end(msg, hdr);
5279         return genlmsg_reply(msg, info);
5280
5281  nla_put_failure:
5282         genlmsg_cancel(msg, hdr);
5283  out:
5284         nlmsg_free(msg);
5285         return -ENOBUFS;
5286 }
5287
5288 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5289         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5290         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5291         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5292         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5293         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5294         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5295         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5296         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5297         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5298         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5299         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5300         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5301         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5302         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5303         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5304         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5305         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5306         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5307         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5308         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5309         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5310         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5311         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5312         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5313         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5314         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5315         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5316         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5317 };
5318
5319 static const struct nla_policy
5320         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5321         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5322         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5323         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5324         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5325         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5326         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5327         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5328                                     .len = IEEE80211_MAX_DATA_LEN },
5329         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5330 };
5331
5332 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5333 {
5334         u8 val = nla_get_u8(nla);
5335         if (val < min || val > max)
5336                 return -EINVAL;
5337         *out = val;
5338         return 0;
5339 }
5340
5341 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5342 {
5343         u8 val = nla_get_u8(nla);
5344         if (val < min || val > max)
5345                 return -EINVAL;
5346         *out = val;
5347         return 0;
5348 }
5349
5350 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5351 {
5352         u16 val = nla_get_u16(nla);
5353         if (val < min || val > max)
5354                 return -EINVAL;
5355         *out = val;
5356         return 0;
5357 }
5358
5359 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5360 {
5361         u32 val = nla_get_u32(nla);
5362         if (val < min || val > max)
5363                 return -EINVAL;
5364         *out = val;
5365         return 0;
5366 }
5367
5368 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5369 {
5370         s32 val = nla_get_s32(nla);
5371         if (val < min || val > max)
5372                 return -EINVAL;
5373         *out = val;
5374         return 0;
5375 }
5376
5377 static int nl80211_parse_mesh_config(struct genl_info *info,
5378                                      struct mesh_config *cfg,
5379                                      u32 *mask_out)
5380 {
5381         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5382         u32 mask = 0;
5383
5384 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5385 do {                                                                        \
5386         if (tb[attr]) {                                                     \
5387                 if (fn(tb[attr], min, max, &cfg->param))                    \
5388                         return -EINVAL;                                     \
5389                 mask |= (1 << (attr - 1));                                  \
5390         }                                                                   \
5391 } while (0)
5392
5393         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5394                 return -EINVAL;
5395         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5396                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5397                              nl80211_meshconf_params_policy))
5398                 return -EINVAL;
5399
5400         /* This makes sure that there aren't more than 32 mesh config
5401          * parameters (otherwise our bitfield scheme would not work.) */
5402         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5403
5404         /* Fill in the params struct */
5405         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5406                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5407                                   nl80211_check_u16);
5408         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5409                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5410                                   nl80211_check_u16);
5411         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5412                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5413                                   nl80211_check_u16);
5414         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5415                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5416                                   nl80211_check_u16);
5417         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5418                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5419                                   nl80211_check_u8);
5420         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5421                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5422         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5423                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5424                                   nl80211_check_u8);
5425         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5426                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5427                                   nl80211_check_bool);
5428         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5429                                   1, 255, mask,
5430                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5431                                   nl80211_check_u32);
5432         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5433                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5434                                   nl80211_check_u8);
5435         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5436                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5437                                   nl80211_check_u32);
5438         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5439                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5440                                   nl80211_check_u16);
5441         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5442                                   1, 65535, mask,
5443                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5444                                   nl80211_check_u32);
5445         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5446                                   1, 65535, mask,
5447                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5448                                   nl80211_check_u16);
5449         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5450                                   1, 65535, mask,
5451                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5452                                   nl80211_check_u16);
5453         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5454                                   dot11MeshHWMPnetDiameterTraversalTime,
5455                                   1, 65535, mask,
5456                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5457                                   nl80211_check_u16);
5458         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5459                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5460                                   nl80211_check_u8);
5461         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5462                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5463                                   nl80211_check_u16);
5464         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5465                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5466                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5467                                   nl80211_check_bool);
5468         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5469                                   mask, NL80211_MESHCONF_FORWARDING,
5470                                   nl80211_check_bool);
5471         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5472                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5473                                   nl80211_check_s32);
5474         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5475                                   mask, NL80211_MESHCONF_HT_OPMODE,
5476                                   nl80211_check_u16);
5477         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5478                                   1, 65535, mask,
5479                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5480                                   nl80211_check_u32);
5481         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5482                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5483                                   nl80211_check_u16);
5484         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5485                                   dot11MeshHWMPconfirmationInterval,
5486                                   1, 65535, mask,
5487                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5488                                   nl80211_check_u16);
5489         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5490                                   NL80211_MESH_POWER_ACTIVE,
5491                                   NL80211_MESH_POWER_MAX,
5492                                   mask, NL80211_MESHCONF_POWER_MODE,
5493                                   nl80211_check_u32);
5494         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5495                                   0, 65535, mask,
5496                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5497         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5498                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5499                                   nl80211_check_u32);
5500         if (mask_out)
5501                 *mask_out = mask;
5502
5503         return 0;
5504
5505 #undef FILL_IN_MESH_PARAM_IF_SET
5506 }
5507
5508 static int nl80211_parse_mesh_setup(struct genl_info *info,
5509                                      struct mesh_setup *setup)
5510 {
5511         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5512         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5513
5514         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5515                 return -EINVAL;
5516         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5517                              info->attrs[NL80211_ATTR_MESH_SETUP],
5518                              nl80211_mesh_setup_params_policy))
5519                 return -EINVAL;
5520
5521         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5522                 setup->sync_method =
5523                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5524                  IEEE80211_SYNC_METHOD_VENDOR :
5525                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5526
5527         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5528                 setup->path_sel_proto =
5529                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5530                  IEEE80211_PATH_PROTOCOL_VENDOR :
5531                  IEEE80211_PATH_PROTOCOL_HWMP;
5532
5533         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5534                 setup->path_metric =
5535                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5536                  IEEE80211_PATH_METRIC_VENDOR :
5537                  IEEE80211_PATH_METRIC_AIRTIME;
5538
5539         if (tb[NL80211_MESH_SETUP_IE]) {
5540                 struct nlattr *ieattr =
5541                         tb[NL80211_MESH_SETUP_IE];
5542                 if (!is_valid_ie_attr(ieattr))
5543                         return -EINVAL;
5544                 setup->ie = nla_data(ieattr);
5545                 setup->ie_len = nla_len(ieattr);
5546         }
5547         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5548             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5549                 return -EINVAL;
5550         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5551         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5552         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5553         if (setup->is_secure)
5554                 setup->user_mpm = true;
5555
5556         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5557                 if (!setup->user_mpm)
5558                         return -EINVAL;
5559                 setup->auth_id =
5560                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5561         }
5562
5563         return 0;
5564 }
5565
5566 static int nl80211_update_mesh_config(struct sk_buff *skb,
5567                                       struct genl_info *info)
5568 {
5569         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5570         struct net_device *dev = info->user_ptr[1];
5571         struct wireless_dev *wdev = dev->ieee80211_ptr;
5572         struct mesh_config cfg;
5573         u32 mask;
5574         int err;
5575
5576         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5577                 return -EOPNOTSUPP;
5578
5579         if (!rdev->ops->update_mesh_config)
5580                 return -EOPNOTSUPP;
5581
5582         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5583         if (err)
5584                 return err;
5585
5586         wdev_lock(wdev);
5587         if (!wdev->mesh_id_len)
5588                 err = -ENOLINK;
5589
5590         if (!err)
5591                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5592
5593         wdev_unlock(wdev);
5594
5595         return err;
5596 }
5597
5598 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5599                               struct sk_buff *msg)
5600 {
5601         struct nlattr *nl_reg_rules;
5602         unsigned int i;
5603
5604         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5605             (regdom->dfs_region &&
5606              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5607                 goto nla_put_failure;
5608
5609         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5610         if (!nl_reg_rules)
5611                 goto nla_put_failure;
5612
5613         for (i = 0; i < regdom->n_reg_rules; i++) {
5614                 struct nlattr *nl_reg_rule;
5615                 const struct ieee80211_reg_rule *reg_rule;
5616                 const struct ieee80211_freq_range *freq_range;
5617                 const struct ieee80211_power_rule *power_rule;
5618                 unsigned int max_bandwidth_khz;
5619
5620                 reg_rule = &regdom->reg_rules[i];
5621                 freq_range = &reg_rule->freq_range;
5622                 power_rule = &reg_rule->power_rule;
5623
5624                 nl_reg_rule = nla_nest_start(msg, i);
5625                 if (!nl_reg_rule)
5626                         goto nla_put_failure;
5627
5628                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5629                 if (!max_bandwidth_khz)
5630                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5631                                                                   reg_rule);
5632
5633                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5634                                 reg_rule->flags) ||
5635                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5636                                 freq_range->start_freq_khz) ||
5637                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5638                                 freq_range->end_freq_khz) ||
5639                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5640                                 max_bandwidth_khz) ||
5641                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5642                                 power_rule->max_antenna_gain) ||
5643                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5644                                 power_rule->max_eirp) ||
5645                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5646                                 reg_rule->dfs_cac_ms))
5647                         goto nla_put_failure;
5648
5649                 nla_nest_end(msg, nl_reg_rule);
5650         }
5651
5652         nla_nest_end(msg, nl_reg_rules);
5653         return 0;
5654
5655 nla_put_failure:
5656         return -EMSGSIZE;
5657 }
5658
5659 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5660 {
5661         const struct ieee80211_regdomain *regdom = NULL;
5662         struct cfg80211_registered_device *rdev;
5663         struct wiphy *wiphy = NULL;
5664         struct sk_buff *msg;
5665         void *hdr;
5666
5667         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5668         if (!msg)
5669                 return -ENOBUFS;
5670
5671         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5672                              NL80211_CMD_GET_REG);
5673         if (!hdr)
5674                 goto put_failure;
5675
5676         if (info->attrs[NL80211_ATTR_WIPHY]) {
5677                 bool self_managed;
5678
5679                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5680                 if (IS_ERR(rdev)) {
5681                         nlmsg_free(msg);
5682                         return PTR_ERR(rdev);
5683                 }
5684
5685                 wiphy = &rdev->wiphy;
5686                 self_managed = wiphy->regulatory_flags &
5687                                REGULATORY_WIPHY_SELF_MANAGED;
5688                 regdom = get_wiphy_regdom(wiphy);
5689
5690                 /* a self-managed-reg device must have a private regdom */
5691                 if (WARN_ON(!regdom && self_managed)) {
5692                         nlmsg_free(msg);
5693                         return -EINVAL;
5694                 }
5695
5696                 if (regdom &&
5697                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5698                         goto nla_put_failure;
5699         }
5700
5701         if (!wiphy && reg_last_request_cell_base() &&
5702             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5703                         NL80211_USER_REG_HINT_CELL_BASE))
5704                 goto nla_put_failure;
5705
5706         rcu_read_lock();
5707
5708         if (!regdom)
5709                 regdom = rcu_dereference(cfg80211_regdomain);
5710
5711         if (nl80211_put_regdom(regdom, msg))
5712                 goto nla_put_failure_rcu;
5713
5714         rcu_read_unlock();
5715
5716         genlmsg_end(msg, hdr);
5717         return genlmsg_reply(msg, info);
5718
5719 nla_put_failure_rcu:
5720         rcu_read_unlock();
5721 nla_put_failure:
5722         genlmsg_cancel(msg, hdr);
5723 put_failure:
5724         nlmsg_free(msg);
5725         return -EMSGSIZE;
5726 }
5727
5728 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5729                                u32 seq, int flags, struct wiphy *wiphy,
5730                                const struct ieee80211_regdomain *regdom)
5731 {
5732         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5733                                    NL80211_CMD_GET_REG);
5734
5735         if (!hdr)
5736                 return -1;
5737
5738         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5739
5740         if (nl80211_put_regdom(regdom, msg))
5741                 goto nla_put_failure;
5742
5743         if (!wiphy && reg_last_request_cell_base() &&
5744             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5745                         NL80211_USER_REG_HINT_CELL_BASE))
5746                 goto nla_put_failure;
5747
5748         if (wiphy &&
5749             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5750                 goto nla_put_failure;
5751
5752         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5753             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5754                 goto nla_put_failure;
5755
5756         genlmsg_end(msg, hdr);
5757         return 0;
5758
5759 nla_put_failure:
5760         genlmsg_cancel(msg, hdr);
5761         return -EMSGSIZE;
5762 }
5763
5764 static int nl80211_get_reg_dump(struct sk_buff *skb,
5765                                 struct netlink_callback *cb)
5766 {
5767         const struct ieee80211_regdomain *regdom = NULL;
5768         struct cfg80211_registered_device *rdev;
5769         int err, reg_idx, start = cb->args[2];
5770
5771         rtnl_lock();
5772
5773         if (cfg80211_regdomain && start == 0) {
5774                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5775                                           NLM_F_MULTI, NULL,
5776                                           rtnl_dereference(cfg80211_regdomain));
5777                 if (err < 0)
5778                         goto out_err;
5779         }
5780
5781         /* the global regdom is idx 0 */
5782         reg_idx = 1;
5783         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5784                 regdom = get_wiphy_regdom(&rdev->wiphy);
5785                 if (!regdom)
5786                         continue;
5787
5788                 if (++reg_idx <= start)
5789                         continue;
5790
5791                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5792                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5793                 if (err < 0) {
5794                         reg_idx--;
5795                         break;
5796                 }
5797         }
5798
5799         cb->args[2] = reg_idx;
5800         err = skb->len;
5801 out_err:
5802         rtnl_unlock();
5803         return err;
5804 }
5805
5806 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5807 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5808         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5809         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5810         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5811         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5812         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5813         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5814         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5815 };
5816
5817 static int parse_reg_rule(struct nlattr *tb[],
5818         struct ieee80211_reg_rule *reg_rule)
5819 {
5820         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5821         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5822
5823         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5824                 return -EINVAL;
5825         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5826                 return -EINVAL;
5827         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5828                 return -EINVAL;
5829         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5830                 return -EINVAL;
5831         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5832                 return -EINVAL;
5833
5834         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5835
5836         freq_range->start_freq_khz =
5837                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5838         freq_range->end_freq_khz =
5839                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5840         freq_range->max_bandwidth_khz =
5841                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5842
5843         power_rule->max_eirp =
5844                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5845
5846         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5847                 power_rule->max_antenna_gain =
5848                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5849
5850         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5851                 reg_rule->dfs_cac_ms =
5852                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5853
5854         return 0;
5855 }
5856
5857 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5858 {
5859         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5860         struct nlattr *nl_reg_rule;
5861         char *alpha2;
5862         int rem_reg_rules, r;
5863         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5864         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5865         struct ieee80211_regdomain *rd;
5866
5867         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5868                 return -EINVAL;
5869
5870         if (!info->attrs[NL80211_ATTR_REG_RULES])
5871                 return -EINVAL;
5872
5873         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5874
5875         if (info->attrs[NL80211_ATTR_DFS_REGION])
5876                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5877
5878         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5879                             rem_reg_rules) {
5880                 num_rules++;
5881                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5882                         return -EINVAL;
5883         }
5884
5885         if (!reg_is_valid_request(alpha2))
5886                 return -EINVAL;
5887
5888         size_of_regd = sizeof(struct ieee80211_regdomain) +
5889                        num_rules * sizeof(struct ieee80211_reg_rule);
5890
5891         rd = kzalloc(size_of_regd, GFP_KERNEL);
5892         if (!rd)
5893                 return -ENOMEM;
5894
5895         rd->n_reg_rules = num_rules;
5896         rd->alpha2[0] = alpha2[0];
5897         rd->alpha2[1] = alpha2[1];
5898
5899         /*
5900          * Disable DFS master mode if the DFS region was
5901          * not supported or known on this kernel.
5902          */
5903         if (reg_supported_dfs_region(dfs_region))
5904                 rd->dfs_region = dfs_region;
5905
5906         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5907                             rem_reg_rules) {
5908                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5909                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5910                               reg_rule_policy);
5911                 if (r)
5912                         goto bad_reg;
5913                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5914                 if (r)
5915                         goto bad_reg;
5916
5917                 rule_idx++;
5918
5919                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5920                         r = -EINVAL;
5921                         goto bad_reg;
5922                 }
5923         }
5924
5925         /* set_regdom takes ownership of rd */
5926         return set_regdom(rd, REGD_SOURCE_CRDA);
5927  bad_reg:
5928         kfree(rd);
5929         return r;
5930 }
5931 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5932
5933 static int validate_scan_freqs(struct nlattr *freqs)
5934 {
5935         struct nlattr *attr1, *attr2;
5936         int n_channels = 0, tmp1, tmp2;
5937
5938         nla_for_each_nested(attr1, freqs, tmp1) {
5939                 n_channels++;
5940                 /*
5941                  * Some hardware has a limited channel list for
5942                  * scanning, and it is pretty much nonsensical
5943                  * to scan for a channel twice, so disallow that
5944                  * and don't require drivers to check that the
5945                  * channel list they get isn't longer than what
5946                  * they can scan, as long as they can scan all
5947                  * the channels they registered at once.
5948                  */
5949                 nla_for_each_nested(attr2, freqs, tmp2)
5950                         if (attr1 != attr2 &&
5951                             nla_get_u32(attr1) == nla_get_u32(attr2))
5952                                 return 0;
5953         }
5954
5955         return n_channels;
5956 }
5957
5958 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
5959 {
5960         return b < NUM_NL80211_BANDS && wiphy->bands[b];
5961 }
5962
5963 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5964                             struct cfg80211_bss_selection *bss_select)
5965 {
5966         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5967         struct nlattr *nest;
5968         int err;
5969         bool found = false;
5970         int i;
5971
5972         /* only process one nested attribute */
5973         nest = nla_data(nla);
5974         if (!nla_ok(nest, nla_len(nest)))
5975                 return -EINVAL;
5976
5977         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
5978                         nla_len(nest), nl80211_bss_select_policy);
5979         if (err)
5980                 return err;
5981
5982         /* only one attribute may be given */
5983         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
5984                 if (attr[i]) {
5985                         if (found)
5986                                 return -EINVAL;
5987                         found = true;
5988                 }
5989         }
5990
5991         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
5992
5993         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
5994                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
5995
5996         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
5997                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
5998                 bss_select->param.band_pref =
5999                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6000                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6001                         return -EINVAL;
6002         }
6003
6004         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6005                 struct nl80211_bss_select_rssi_adjust *adj_param;
6006
6007                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6008                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6009                 bss_select->param.adjust.band = adj_param->band;
6010                 bss_select->param.adjust.delta = adj_param->delta;
6011                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6012                         return -EINVAL;
6013         }
6014
6015         /* user-space did not provide behaviour attribute */
6016         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6017                 return -EINVAL;
6018
6019         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6020                 return -EINVAL;
6021
6022         return 0;
6023 }
6024
6025 static int nl80211_parse_random_mac(struct nlattr **attrs,
6026                                     u8 *mac_addr, u8 *mac_addr_mask)
6027 {
6028         int i;
6029
6030         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6031                 eth_zero_addr(mac_addr);
6032                 eth_zero_addr(mac_addr_mask);
6033                 mac_addr[0] = 0x2;
6034                 mac_addr_mask[0] = 0x3;
6035
6036                 return 0;
6037         }
6038
6039         /* need both or none */
6040         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6041                 return -EINVAL;
6042
6043         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6044         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6045
6046         /* don't allow or configure an mcast address */
6047         if (!is_multicast_ether_addr(mac_addr_mask) ||
6048             is_multicast_ether_addr(mac_addr))
6049                 return -EINVAL;
6050
6051         /*
6052          * allow users to pass a MAC address that has bits set outside
6053          * of the mask, but don't bother drivers with having to deal
6054          * with such bits
6055          */
6056         for (i = 0; i < ETH_ALEN; i++)
6057                 mac_addr[i] &= mac_addr_mask[i];
6058
6059         return 0;
6060 }
6061
6062 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6063 {
6064         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6065         struct wireless_dev *wdev = info->user_ptr[1];
6066         struct cfg80211_scan_request *request;
6067         struct nlattr *attr;
6068         struct wiphy *wiphy;
6069         int err, tmp, n_ssids = 0, n_channels, i;
6070         size_t ie_len;
6071
6072         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6073                 return -EINVAL;
6074
6075         wiphy = &rdev->wiphy;
6076
6077         if (!rdev->ops->scan)
6078                 return -EOPNOTSUPP;
6079
6080         if (rdev->scan_req || rdev->scan_msg) {
6081                 err = -EBUSY;
6082                 goto unlock;
6083         }
6084
6085         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6086                 n_channels = validate_scan_freqs(
6087                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6088                 if (!n_channels) {
6089                         err = -EINVAL;
6090                         goto unlock;
6091                 }
6092         } else {
6093                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6094         }
6095
6096         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6097                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6098                         n_ssids++;
6099
6100         if (n_ssids > wiphy->max_scan_ssids) {
6101                 err = -EINVAL;
6102                 goto unlock;
6103         }
6104
6105         if (info->attrs[NL80211_ATTR_IE])
6106                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6107         else
6108                 ie_len = 0;
6109
6110         if (ie_len > wiphy->max_scan_ie_len) {
6111                 err = -EINVAL;
6112                 goto unlock;
6113         }
6114
6115         request = kzalloc(sizeof(*request)
6116                         + sizeof(*request->ssids) * n_ssids
6117                         + sizeof(*request->channels) * n_channels
6118                         + ie_len, GFP_KERNEL);
6119         if (!request) {
6120                 err = -ENOMEM;
6121                 goto unlock;
6122         }
6123
6124         if (n_ssids)
6125                 request->ssids = (void *)&request->channels[n_channels];
6126         request->n_ssids = n_ssids;
6127         if (ie_len) {
6128                 if (n_ssids)
6129                         request->ie = (void *)(request->ssids + n_ssids);
6130                 else
6131                         request->ie = (void *)(request->channels + n_channels);
6132         }
6133
6134         i = 0;
6135         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6136                 /* user specified, bail out if channel not found */
6137                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6138                         struct ieee80211_channel *chan;
6139
6140                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6141
6142                         if (!chan) {
6143                                 err = -EINVAL;
6144                                 goto out_free;
6145                         }
6146
6147                         /* ignore disabled channels */
6148                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6149                                 continue;
6150
6151                         request->channels[i] = chan;
6152                         i++;
6153                 }
6154         } else {
6155                 enum nl80211_band band;
6156
6157                 /* all channels */
6158                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6159                         int j;
6160
6161                         if (!wiphy->bands[band])
6162                                 continue;
6163                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6164                                 struct ieee80211_channel *chan;
6165
6166                                 chan = &wiphy->bands[band]->channels[j];
6167
6168                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6169                                         continue;
6170
6171                                 request->channels[i] = chan;
6172                                 i++;
6173                         }
6174                 }
6175         }
6176
6177         if (!i) {
6178                 err = -EINVAL;
6179                 goto out_free;
6180         }
6181
6182         request->n_channels = i;
6183
6184         i = 0;
6185         if (n_ssids) {
6186                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6187                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6188                                 err = -EINVAL;
6189                                 goto out_free;
6190                         }
6191                         request->ssids[i].ssid_len = nla_len(attr);
6192                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6193                         i++;
6194                 }
6195         }
6196
6197         if (info->attrs[NL80211_ATTR_IE]) {
6198                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6199                 memcpy((void *)request->ie,
6200                        nla_data(info->attrs[NL80211_ATTR_IE]),
6201                        request->ie_len);
6202         }
6203
6204         for (i = 0; i < NUM_NL80211_BANDS; i++)
6205                 if (wiphy->bands[i])
6206                         request->rates[i] =
6207                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6208
6209         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6210                 nla_for_each_nested(attr,
6211                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6212                                     tmp) {
6213                         enum nl80211_band band = nla_type(attr);
6214
6215                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6216                                 err = -EINVAL;
6217                                 goto out_free;
6218                         }
6219
6220                         if (!wiphy->bands[band])
6221                                 continue;
6222
6223                         err = ieee80211_get_ratemask(wiphy->bands[band],
6224                                                      nla_data(attr),
6225                                                      nla_len(attr),
6226                                                      &request->rates[band]);
6227                         if (err)
6228                                 goto out_free;
6229                 }
6230         }
6231
6232         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6233                 if (!wiphy_ext_feature_isset(wiphy,
6234                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6235                         err = -EOPNOTSUPP;
6236                         goto out_free;
6237                 }
6238
6239                 request->duration =
6240                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6241                 request->duration_mandatory =
6242                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6243         }
6244
6245         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6246                 request->flags = nla_get_u32(
6247                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6248                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6249                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6250                         err = -EOPNOTSUPP;
6251                         goto out_free;
6252                 }
6253
6254                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6255                         if (!(wiphy->features &
6256                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6257                                 err = -EOPNOTSUPP;
6258                                 goto out_free;
6259                         }
6260
6261                         if (wdev->current_bss) {
6262                                 err = -EOPNOTSUPP;
6263                                 goto out_free;
6264                         }
6265
6266                         err = nl80211_parse_random_mac(info->attrs,
6267                                                        request->mac_addr,
6268                                                        request->mac_addr_mask);
6269                         if (err)
6270                                 goto out_free;
6271                 }
6272         }
6273
6274         request->no_cck =
6275                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6276
6277         if (info->attrs[NL80211_ATTR_MAC])
6278                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6279                        ETH_ALEN);
6280         else
6281                 eth_broadcast_addr(request->bssid);
6282
6283         request->wdev = wdev;
6284         request->wiphy = &rdev->wiphy;
6285         request->scan_start = jiffies;
6286
6287         rdev->scan_req = request;
6288         err = rdev_scan(rdev, request);
6289
6290         if (!err) {
6291                 nl80211_send_scan_start(rdev, wdev);
6292                 if (wdev->netdev)
6293                         dev_hold(wdev->netdev);
6294         } else {
6295  out_free:
6296                 rdev->scan_req = NULL;
6297                 kfree(request);
6298         }
6299
6300  unlock:
6301         return err;
6302 }
6303
6304 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6305 {
6306         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6307         struct wireless_dev *wdev = info->user_ptr[1];
6308
6309         if (!rdev->ops->abort_scan)
6310                 return -EOPNOTSUPP;
6311
6312         if (rdev->scan_msg)
6313                 return 0;
6314
6315         if (!rdev->scan_req)
6316                 return -ENOENT;
6317
6318         rdev_abort_scan(rdev, wdev);
6319         return 0;
6320 }
6321
6322 static int
6323 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6324                                struct cfg80211_sched_scan_request *request,
6325                                struct nlattr **attrs)
6326 {
6327         int tmp, err, i = 0;
6328         struct nlattr *attr;
6329
6330         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6331                 u32 interval;
6332
6333                 /*
6334                  * If scan plans are not specified,
6335                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6336                  * case one scan plan will be set with the specified scan
6337                  * interval and infinite number of iterations.
6338                  */
6339                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6340                         return -EINVAL;
6341
6342                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6343                 if (!interval)
6344                         return -EINVAL;
6345
6346                 request->scan_plans[0].interval =
6347                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6348                 if (!request->scan_plans[0].interval)
6349                         return -EINVAL;
6350
6351                 if (request->scan_plans[0].interval >
6352                     wiphy->max_sched_scan_plan_interval)
6353                         request->scan_plans[0].interval =
6354                                 wiphy->max_sched_scan_plan_interval;
6355
6356                 return 0;
6357         }
6358
6359         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6360                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6361
6362                 if (WARN_ON(i >= n_plans))
6363                         return -EINVAL;
6364
6365                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6366                                 nla_data(attr), nla_len(attr),
6367                                 nl80211_plan_policy);
6368                 if (err)
6369                         return err;
6370
6371                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6372                         return -EINVAL;
6373
6374                 request->scan_plans[i].interval =
6375                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6376                 if (!request->scan_plans[i].interval ||
6377                     request->scan_plans[i].interval >
6378                     wiphy->max_sched_scan_plan_interval)
6379                         return -EINVAL;
6380
6381                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6382                         request->scan_plans[i].iterations =
6383                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6384                         if (!request->scan_plans[i].iterations ||
6385                             (request->scan_plans[i].iterations >
6386                              wiphy->max_sched_scan_plan_iterations))
6387                                 return -EINVAL;
6388                 } else if (i < n_plans - 1) {
6389                         /*
6390                          * All scan plans but the last one must specify
6391                          * a finite number of iterations
6392                          */
6393                         return -EINVAL;
6394                 }
6395
6396                 i++;
6397         }
6398
6399         /*
6400          * The last scan plan must not specify the number of
6401          * iterations, it is supposed to run infinitely
6402          */
6403         if (request->scan_plans[n_plans - 1].iterations)
6404                 return  -EINVAL;
6405
6406         return 0;
6407 }
6408
6409 static struct cfg80211_sched_scan_request *
6410 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6411                          struct nlattr **attrs)
6412 {
6413         struct cfg80211_sched_scan_request *request;
6414         struct nlattr *attr;
6415         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6416         enum nl80211_band band;
6417         size_t ie_len;
6418         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6419         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6420
6421         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6422                 return ERR_PTR(-EINVAL);
6423
6424         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6425                 n_channels = validate_scan_freqs(
6426                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6427                 if (!n_channels)
6428                         return ERR_PTR(-EINVAL);
6429         } else {
6430                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6431         }
6432
6433         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6434                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6435                                     tmp)
6436                         n_ssids++;
6437
6438         if (n_ssids > wiphy->max_sched_scan_ssids)
6439                 return ERR_PTR(-EINVAL);
6440
6441         /*
6442          * First, count the number of 'real' matchsets. Due to an issue with
6443          * the old implementation, matchsets containing only the RSSI attribute
6444          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6445          * RSSI for all matchsets, rather than their own matchset for reporting
6446          * all APs with a strong RSSI. This is needed to be compatible with
6447          * older userspace that treated a matchset with only the RSSI as the
6448          * global RSSI for all other matchsets - if there are other matchsets.
6449          */
6450         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6451                 nla_for_each_nested(attr,
6452                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6453                                     tmp) {
6454                         struct nlattr *rssi;
6455
6456                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6457                                         nla_data(attr), nla_len(attr),
6458                                         nl80211_match_policy);
6459                         if (err)
6460                                 return ERR_PTR(err);
6461                         /* add other standalone attributes here */
6462                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6463                                 n_match_sets++;
6464                                 continue;
6465                         }
6466                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6467                         if (rssi)
6468                                 default_match_rssi = nla_get_s32(rssi);
6469                 }
6470         }
6471
6472         /* However, if there's no other matchset, add the RSSI one */
6473         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6474                 n_match_sets = 1;
6475
6476         if (n_match_sets > wiphy->max_match_sets)
6477                 return ERR_PTR(-EINVAL);
6478
6479         if (attrs[NL80211_ATTR_IE])
6480                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6481         else
6482                 ie_len = 0;
6483
6484         if (ie_len > wiphy->max_sched_scan_ie_len)
6485                 return ERR_PTR(-EINVAL);
6486
6487         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6488                 /*
6489                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6490                  * each scan plan already specifies its own interval
6491                  */
6492                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6493                         return ERR_PTR(-EINVAL);
6494
6495                 nla_for_each_nested(attr,
6496                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6497                         n_plans++;
6498         } else {
6499                 /*
6500                  * The scan interval attribute is kept for backward
6501                  * compatibility. If no scan plans are specified and sched scan
6502                  * interval is specified, one scan plan will be set with this
6503                  * scan interval and infinite number of iterations.
6504                  */
6505                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6506                         return ERR_PTR(-EINVAL);
6507
6508                 n_plans = 1;
6509         }
6510
6511         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6512                 return ERR_PTR(-EINVAL);
6513
6514         request = kzalloc(sizeof(*request)
6515                         + sizeof(*request->ssids) * n_ssids
6516                         + sizeof(*request->match_sets) * n_match_sets
6517                         + sizeof(*request->scan_plans) * n_plans
6518                         + sizeof(*request->channels) * n_channels
6519                         + ie_len, GFP_KERNEL);
6520         if (!request)
6521                 return ERR_PTR(-ENOMEM);
6522
6523         if (n_ssids)
6524                 request->ssids = (void *)&request->channels[n_channels];
6525         request->n_ssids = n_ssids;
6526         if (ie_len) {
6527                 if (n_ssids)
6528                         request->ie = (void *)(request->ssids + n_ssids);
6529                 else
6530                         request->ie = (void *)(request->channels + n_channels);
6531         }
6532
6533         if (n_match_sets) {
6534                 if (request->ie)
6535                         request->match_sets = (void *)(request->ie + ie_len);
6536                 else if (n_ssids)
6537                         request->match_sets =
6538                                 (void *)(request->ssids + n_ssids);
6539                 else
6540                         request->match_sets =
6541                                 (void *)(request->channels + n_channels);
6542         }
6543         request->n_match_sets = n_match_sets;
6544
6545         if (n_match_sets)
6546                 request->scan_plans = (void *)(request->match_sets +
6547                                                n_match_sets);
6548         else if (request->ie)
6549                 request->scan_plans = (void *)(request->ie + ie_len);
6550         else if (n_ssids)
6551                 request->scan_plans = (void *)(request->ssids + n_ssids);
6552         else
6553                 request->scan_plans = (void *)(request->channels + n_channels);
6554
6555         request->n_scan_plans = n_plans;
6556
6557         i = 0;
6558         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6559                 /* user specified, bail out if channel not found */
6560                 nla_for_each_nested(attr,
6561                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6562                                     tmp) {
6563                         struct ieee80211_channel *chan;
6564
6565                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6566
6567                         if (!chan) {
6568                                 err = -EINVAL;
6569                                 goto out_free;
6570                         }
6571
6572                         /* ignore disabled channels */
6573                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6574                                 continue;
6575
6576                         request->channels[i] = chan;
6577                         i++;
6578                 }
6579         } else {
6580                 /* all channels */
6581                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6582                         int j;
6583
6584                         if (!wiphy->bands[band])
6585                                 continue;
6586                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6587                                 struct ieee80211_channel *chan;
6588
6589                                 chan = &wiphy->bands[band]->channels[j];
6590
6591                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6592                                         continue;
6593
6594                                 request->channels[i] = chan;
6595                                 i++;
6596                         }
6597                 }
6598         }
6599
6600         if (!i) {
6601                 err = -EINVAL;
6602                 goto out_free;
6603         }
6604
6605         request->n_channels = i;
6606
6607         i = 0;
6608         if (n_ssids) {
6609                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6610                                     tmp) {
6611                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6612                                 err = -EINVAL;
6613                                 goto out_free;
6614                         }
6615                         request->ssids[i].ssid_len = nla_len(attr);
6616                         memcpy(request->ssids[i].ssid, nla_data(attr),
6617                                nla_len(attr));
6618                         i++;
6619                 }
6620         }
6621
6622         i = 0;
6623         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6624                 nla_for_each_nested(attr,
6625                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6626                                     tmp) {
6627                         struct nlattr *ssid, *rssi;
6628
6629                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6630                                         nla_data(attr), nla_len(attr),
6631                                         nl80211_match_policy);
6632                         if (err)
6633                                 goto out_free;
6634                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6635                         if (ssid) {
6636                                 if (WARN_ON(i >= n_match_sets)) {
6637                                         /* this indicates a programming error,
6638                                          * the loop above should have verified
6639                                          * things properly
6640                                          */
6641                                         err = -EINVAL;
6642                                         goto out_free;
6643                                 }
6644
6645                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6646                                         err = -EINVAL;
6647                                         goto out_free;
6648                                 }
6649                                 memcpy(request->match_sets[i].ssid.ssid,
6650                                        nla_data(ssid), nla_len(ssid));
6651                                 request->match_sets[i].ssid.ssid_len =
6652                                         nla_len(ssid);
6653                                 /* special attribute - old implementation w/a */
6654                                 request->match_sets[i].rssi_thold =
6655                                         default_match_rssi;
6656                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6657                                 if (rssi)
6658                                         request->match_sets[i].rssi_thold =
6659                                                 nla_get_s32(rssi);
6660                         }
6661                         i++;
6662                 }
6663
6664                 /* there was no other matchset, so the RSSI one is alone */
6665                 if (i == 0 && n_match_sets)
6666                         request->match_sets[0].rssi_thold = default_match_rssi;
6667
6668                 request->min_rssi_thold = INT_MAX;
6669                 for (i = 0; i < n_match_sets; i++)
6670                         request->min_rssi_thold =
6671                                 min(request->match_sets[i].rssi_thold,
6672                                     request->min_rssi_thold);
6673         } else {
6674                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6675         }
6676
6677         if (ie_len) {
6678                 request->ie_len = ie_len;
6679                 memcpy((void *)request->ie,
6680                        nla_data(attrs[NL80211_ATTR_IE]),
6681                        request->ie_len);
6682         }
6683
6684         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6685                 request->flags = nla_get_u32(
6686                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6687                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6688                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6689                         err = -EOPNOTSUPP;
6690                         goto out_free;
6691                 }
6692
6693                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6694                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6695
6696                         if (!wdev) /* must be net-detect */
6697                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6698
6699                         if (!(wiphy->features & flg)) {
6700                                 err = -EOPNOTSUPP;
6701                                 goto out_free;
6702                         }
6703
6704                         if (wdev && wdev->current_bss) {
6705                                 err = -EOPNOTSUPP;
6706                                 goto out_free;
6707                         }
6708
6709                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6710                                                        request->mac_addr_mask);
6711                         if (err)
6712                                 goto out_free;
6713                 }
6714         }
6715
6716         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6717                 request->delay =
6718                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6719
6720         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6721         if (err)
6722                 goto out_free;
6723
6724         request->scan_start = jiffies;
6725
6726         return request;
6727
6728 out_free:
6729         kfree(request);
6730         return ERR_PTR(err);
6731 }
6732
6733 static int nl80211_start_sched_scan(struct sk_buff *skb,
6734                                     struct genl_info *info)
6735 {
6736         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6737         struct net_device *dev = info->user_ptr[1];
6738         struct wireless_dev *wdev = dev->ieee80211_ptr;
6739         struct cfg80211_sched_scan_request *sched_scan_req;
6740         int err;
6741
6742         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6743             !rdev->ops->sched_scan_start)
6744                 return -EOPNOTSUPP;
6745
6746         if (rdev->sched_scan_req)
6747                 return -EINPROGRESS;
6748
6749         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6750                                                   info->attrs);
6751
6752         err = PTR_ERR_OR_ZERO(sched_scan_req);
6753         if (err)
6754                 goto out_err;
6755
6756         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6757         if (err)
6758                 goto out_free;
6759
6760         sched_scan_req->dev = dev;
6761         sched_scan_req->wiphy = &rdev->wiphy;
6762
6763         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6764                 sched_scan_req->owner_nlportid = info->snd_portid;
6765
6766         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6767
6768         nl80211_send_sched_scan(rdev, dev,
6769                                 NL80211_CMD_START_SCHED_SCAN);
6770         return 0;
6771
6772 out_free:
6773         kfree(sched_scan_req);
6774 out_err:
6775         return err;
6776 }
6777
6778 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6779                                    struct genl_info *info)
6780 {
6781         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6782
6783         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6784             !rdev->ops->sched_scan_stop)
6785                 return -EOPNOTSUPP;
6786
6787         return __cfg80211_stop_sched_scan(rdev, false);
6788 }
6789
6790 static int nl80211_start_radar_detection(struct sk_buff *skb,
6791                                          struct genl_info *info)
6792 {
6793         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6794         struct net_device *dev = info->user_ptr[1];
6795         struct wireless_dev *wdev = dev->ieee80211_ptr;
6796         struct cfg80211_chan_def chandef;
6797         enum nl80211_dfs_regions dfs_region;
6798         unsigned int cac_time_ms;
6799         int err;
6800
6801         dfs_region = reg_get_dfs_region(wdev->wiphy);
6802         if (dfs_region == NL80211_DFS_UNSET)
6803                 return -EINVAL;
6804
6805         err = nl80211_parse_chandef(rdev, info, &chandef);
6806         if (err)
6807                 return err;
6808
6809         if (netif_carrier_ok(dev))
6810                 return -EBUSY;
6811
6812         if (wdev->cac_started)
6813                 return -EBUSY;
6814
6815         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6816                                             wdev->iftype);
6817         if (err < 0)
6818                 return err;
6819
6820         if (err == 0)
6821                 return -EINVAL;
6822
6823         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6824                 return -EINVAL;
6825
6826         if (!rdev->ops->start_radar_detection)
6827                 return -EOPNOTSUPP;
6828
6829         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6830         if (WARN_ON(!cac_time_ms))
6831                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6832
6833         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6834         if (!err) {
6835                 wdev->chandef = chandef;
6836                 wdev->cac_started = true;
6837                 wdev->cac_start_time = jiffies;
6838                 wdev->cac_time_ms = cac_time_ms;
6839         }
6840         return err;
6841 }
6842
6843 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6844 {
6845         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6846         struct net_device *dev = info->user_ptr[1];
6847         struct wireless_dev *wdev = dev->ieee80211_ptr;
6848         struct cfg80211_csa_settings params;
6849         /* csa_attrs is defined static to avoid waste of stack size - this
6850          * function is called under RTNL lock, so this should not be a problem.
6851          */
6852         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6853         int err;
6854         bool need_new_beacon = false;
6855         int len, i;
6856         u32 cs_count;
6857
6858         if (!rdev->ops->channel_switch ||
6859             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6860                 return -EOPNOTSUPP;
6861
6862         switch (dev->ieee80211_ptr->iftype) {
6863         case NL80211_IFTYPE_AP:
6864         case NL80211_IFTYPE_P2P_GO:
6865                 need_new_beacon = true;
6866
6867                 /* useless if AP is not running */
6868                 if (!wdev->beacon_interval)
6869                         return -ENOTCONN;
6870                 break;
6871         case NL80211_IFTYPE_ADHOC:
6872                 if (!wdev->ssid_len)
6873                         return -ENOTCONN;
6874                 break;
6875         case NL80211_IFTYPE_MESH_POINT:
6876                 if (!wdev->mesh_id_len)
6877                         return -ENOTCONN;
6878                 break;
6879         default:
6880                 return -EOPNOTSUPP;
6881         }
6882
6883         memset(&params, 0, sizeof(params));
6884
6885         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6886             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6887                 return -EINVAL;
6888
6889         /* only important for AP, IBSS and mesh create IEs internally */
6890         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6891                 return -EINVAL;
6892
6893         /* Even though the attribute is u32, the specification says
6894          * u8, so let's make sure we don't overflow.
6895          */
6896         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6897         if (cs_count > 255)
6898                 return -EINVAL;
6899
6900         params.count = cs_count;
6901
6902         if (!need_new_beacon)
6903                 goto skip_beacons;
6904
6905         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6906         if (err)
6907                 return err;
6908
6909         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6910                                info->attrs[NL80211_ATTR_CSA_IES],
6911                                nl80211_policy);
6912         if (err)
6913                 return err;
6914
6915         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6916         if (err)
6917                 return err;
6918
6919         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6920                 return -EINVAL;
6921
6922         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6923         if (!len || (len % sizeof(u16)))
6924                 return -EINVAL;
6925
6926         params.n_counter_offsets_beacon = len / sizeof(u16);
6927         if (rdev->wiphy.max_num_csa_counters &&
6928             (params.n_counter_offsets_beacon >
6929              rdev->wiphy.max_num_csa_counters))
6930                 return -EINVAL;
6931
6932         params.counter_offsets_beacon =
6933                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6934
6935         /* sanity checks - counters should fit and be the same */
6936         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6937                 u16 offset = params.counter_offsets_beacon[i];
6938
6939                 if (offset >= params.beacon_csa.tail_len)
6940                         return -EINVAL;
6941
6942                 if (params.beacon_csa.tail[offset] != params.count)
6943                         return -EINVAL;
6944         }
6945
6946         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6947                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6948                 if (!len || (len % sizeof(u16)))
6949                         return -EINVAL;
6950
6951                 params.n_counter_offsets_presp = len / sizeof(u16);
6952                 if (rdev->wiphy.max_num_csa_counters &&
6953                     (params.n_counter_offsets_beacon >
6954                      rdev->wiphy.max_num_csa_counters))
6955                         return -EINVAL;
6956
6957                 params.counter_offsets_presp =
6958                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6959
6960                 /* sanity checks - counters should fit and be the same */
6961                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6962                         u16 offset = params.counter_offsets_presp[i];
6963
6964                         if (offset >= params.beacon_csa.probe_resp_len)
6965                                 return -EINVAL;
6966
6967                         if (params.beacon_csa.probe_resp[offset] !=
6968                             params.count)
6969                                 return -EINVAL;
6970                 }
6971         }
6972
6973 skip_beacons:
6974         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6975         if (err)
6976                 return err;
6977
6978         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6979                                            wdev->iftype))
6980                 return -EINVAL;
6981
6982         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6983                                             &params.chandef,
6984                                             wdev->iftype);
6985         if (err < 0)
6986                 return err;
6987
6988         if (err > 0)
6989                 params.radar_required = true;
6990
6991         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6992                 params.block_tx = true;
6993
6994         wdev_lock(wdev);
6995         err = rdev_channel_switch(rdev, dev, &params);
6996         wdev_unlock(wdev);
6997
6998         return err;
6999 }
7000
7001 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7002                             u32 seq, int flags,
7003                             struct cfg80211_registered_device *rdev,
7004                             struct wireless_dev *wdev,
7005                             struct cfg80211_internal_bss *intbss)
7006 {
7007         struct cfg80211_bss *res = &intbss->pub;
7008         const struct cfg80211_bss_ies *ies;
7009         void *hdr;
7010         struct nlattr *bss;
7011
7012         ASSERT_WDEV_LOCK(wdev);
7013
7014         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7015                              NL80211_CMD_NEW_SCAN_RESULTS);
7016         if (!hdr)
7017                 return -1;
7018
7019         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7020
7021         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7022                 goto nla_put_failure;
7023         if (wdev->netdev &&
7024             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7025                 goto nla_put_failure;
7026         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7027                               NL80211_ATTR_PAD))
7028                 goto nla_put_failure;
7029
7030         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7031         if (!bss)
7032                 goto nla_put_failure;
7033         if ((!is_zero_ether_addr(res->bssid) &&
7034              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7035                 goto nla_put_failure;
7036
7037         rcu_read_lock();
7038         /* indicate whether we have probe response data or not */
7039         if (rcu_access_pointer(res->proberesp_ies) &&
7040             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7041                 goto fail_unlock_rcu;
7042
7043         /* this pointer prefers to be pointed to probe response data
7044          * but is always valid
7045          */
7046         ies = rcu_dereference(res->ies);
7047         if (ies) {
7048                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7049                                       NL80211_BSS_PAD))
7050                         goto fail_unlock_rcu;
7051                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7052                                         ies->len, ies->data))
7053                         goto fail_unlock_rcu;
7054         }
7055
7056         /* and this pointer is always (unless driver didn't know) beacon data */
7057         ies = rcu_dereference(res->beacon_ies);
7058         if (ies && ies->from_beacon) {
7059                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7060                                       NL80211_BSS_PAD))
7061                         goto fail_unlock_rcu;
7062                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7063                                         ies->len, ies->data))
7064                         goto fail_unlock_rcu;
7065         }
7066         rcu_read_unlock();
7067
7068         if (res->beacon_interval &&
7069             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7070                 goto nla_put_failure;
7071         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7072             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7073             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7074             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7075                         jiffies_to_msecs(jiffies - intbss->ts)))
7076                 goto nla_put_failure;
7077
7078         if (intbss->parent_tsf &&
7079             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7080                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7081              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7082                      intbss->parent_bssid)))
7083                 goto nla_put_failure;
7084
7085         if (intbss->ts_boottime &&
7086             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7087                               intbss->ts_boottime, NL80211_BSS_PAD))
7088                 goto nla_put_failure;
7089
7090         switch (rdev->wiphy.signal_type) {
7091         case CFG80211_SIGNAL_TYPE_MBM:
7092                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7093                         goto nla_put_failure;
7094                 break;
7095         case CFG80211_SIGNAL_TYPE_UNSPEC:
7096                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7097                         goto nla_put_failure;
7098                 break;
7099         default:
7100                 break;
7101         }
7102
7103         switch (wdev->iftype) {
7104         case NL80211_IFTYPE_P2P_CLIENT:
7105         case NL80211_IFTYPE_STATION:
7106                 if (intbss == wdev->current_bss &&
7107                     nla_put_u32(msg, NL80211_BSS_STATUS,
7108                                 NL80211_BSS_STATUS_ASSOCIATED))
7109                         goto nla_put_failure;
7110                 break;
7111         case NL80211_IFTYPE_ADHOC:
7112                 if (intbss == wdev->current_bss &&
7113                     nla_put_u32(msg, NL80211_BSS_STATUS,
7114                                 NL80211_BSS_STATUS_IBSS_JOINED))
7115                         goto nla_put_failure;
7116                 break;
7117         default:
7118                 break;
7119         }
7120
7121         nla_nest_end(msg, bss);
7122
7123         genlmsg_end(msg, hdr);
7124         return 0;
7125
7126  fail_unlock_rcu:
7127         rcu_read_unlock();
7128  nla_put_failure:
7129         genlmsg_cancel(msg, hdr);
7130         return -EMSGSIZE;
7131 }
7132
7133 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7134 {
7135         struct cfg80211_registered_device *rdev;
7136         struct cfg80211_internal_bss *scan;
7137         struct wireless_dev *wdev;
7138         int start = cb->args[2], idx = 0;
7139         int err;
7140
7141         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7142         if (err)
7143                 return err;
7144
7145         wdev_lock(wdev);
7146         spin_lock_bh(&rdev->bss_lock);
7147         cfg80211_bss_expire(rdev);
7148
7149         cb->seq = rdev->bss_generation;
7150
7151         list_for_each_entry(scan, &rdev->bss_list, list) {
7152                 if (++idx <= start)
7153                         continue;
7154                 if (nl80211_send_bss(skb, cb,
7155                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7156                                 rdev, wdev, scan) < 0) {
7157                         idx--;
7158                         break;
7159                 }
7160         }
7161
7162         spin_unlock_bh(&rdev->bss_lock);
7163         wdev_unlock(wdev);
7164
7165         cb->args[2] = idx;
7166         nl80211_finish_wdev_dump(rdev);
7167
7168         return skb->len;
7169 }
7170
7171 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7172                                int flags, struct net_device *dev,
7173                                bool allow_radio_stats,
7174                                struct survey_info *survey)
7175 {
7176         void *hdr;
7177         struct nlattr *infoattr;
7178
7179         /* skip radio stats if userspace didn't request them */
7180         if (!survey->channel && !allow_radio_stats)
7181                 return 0;
7182
7183         hdr = nl80211hdr_put(msg, portid, seq, flags,
7184                              NL80211_CMD_NEW_SURVEY_RESULTS);
7185         if (!hdr)
7186                 return -ENOMEM;
7187
7188         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7189                 goto nla_put_failure;
7190
7191         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7192         if (!infoattr)
7193                 goto nla_put_failure;
7194
7195         if (survey->channel &&
7196             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7197                         survey->channel->center_freq))
7198                 goto nla_put_failure;
7199
7200         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7201             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7202                 goto nla_put_failure;
7203         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7204             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7205                 goto nla_put_failure;
7206         if ((survey->filled & SURVEY_INFO_TIME) &&
7207             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7208                         survey->time, NL80211_SURVEY_INFO_PAD))
7209                 goto nla_put_failure;
7210         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7211             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7212                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7213                 goto nla_put_failure;
7214         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7215             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7216                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7217                 goto nla_put_failure;
7218         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7219             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7220                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7221                 goto nla_put_failure;
7222         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7223             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7224                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7225                 goto nla_put_failure;
7226         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7227             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7228                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7229                 goto nla_put_failure;
7230
7231         nla_nest_end(msg, infoattr);
7232
7233         genlmsg_end(msg, hdr);
7234         return 0;
7235
7236  nla_put_failure:
7237         genlmsg_cancel(msg, hdr);
7238         return -EMSGSIZE;
7239 }
7240
7241 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7242 {
7243         struct survey_info survey;
7244         struct cfg80211_registered_device *rdev;
7245         struct wireless_dev *wdev;
7246         int survey_idx = cb->args[2];
7247         int res;
7248         bool radio_stats;
7249
7250         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7251         if (res)
7252                 return res;
7253
7254         /* prepare_wdev_dump parsed the attributes */
7255         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7256
7257         if (!wdev->netdev) {
7258                 res = -EINVAL;
7259                 goto out_err;
7260         }
7261
7262         if (!rdev->ops->dump_survey) {
7263                 res = -EOPNOTSUPP;
7264                 goto out_err;
7265         }
7266
7267         while (1) {
7268                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7269                 if (res == -ENOENT)
7270                         break;
7271                 if (res)
7272                         goto out_err;
7273
7274                 /* don't send disabled channels, but do send non-channel data */
7275                 if (survey.channel &&
7276                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7277                         survey_idx++;
7278                         continue;
7279                 }
7280
7281                 if (nl80211_send_survey(skb,
7282                                 NETLINK_CB(cb->skb).portid,
7283                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7284                                 wdev->netdev, radio_stats, &survey) < 0)
7285                         goto out;
7286                 survey_idx++;
7287         }
7288
7289  out:
7290         cb->args[2] = survey_idx;
7291         res = skb->len;
7292  out_err:
7293         nl80211_finish_wdev_dump(rdev);
7294         return res;
7295 }
7296
7297 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7298 {
7299         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7300                                   NL80211_WPA_VERSION_2));
7301 }
7302
7303 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7304 {
7305         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7306         struct net_device *dev = info->user_ptr[1];
7307         struct ieee80211_channel *chan;
7308         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7309         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7310         enum nl80211_auth_type auth_type;
7311         struct key_parse key;
7312         bool local_state_change;
7313
7314         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7315                 return -EINVAL;
7316
7317         if (!info->attrs[NL80211_ATTR_MAC])
7318                 return -EINVAL;
7319
7320         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7321                 return -EINVAL;
7322
7323         if (!info->attrs[NL80211_ATTR_SSID])
7324                 return -EINVAL;
7325
7326         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7327                 return -EINVAL;
7328
7329         err = nl80211_parse_key(info, &key);
7330         if (err)
7331                 return err;
7332
7333         if (key.idx >= 0) {
7334                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7335                         return -EINVAL;
7336                 if (!key.p.key || !key.p.key_len)
7337                         return -EINVAL;
7338                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7339                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7340                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7341                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7342                         return -EINVAL;
7343                 if (key.idx > 4)
7344                         return -EINVAL;
7345         } else {
7346                 key.p.key_len = 0;
7347                 key.p.key = NULL;
7348         }
7349
7350         if (key.idx >= 0) {
7351                 int i;
7352                 bool ok = false;
7353
7354                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7355                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7356                                 ok = true;
7357                                 break;
7358                         }
7359                 }
7360                 if (!ok)
7361                         return -EINVAL;
7362         }
7363
7364         if (!rdev->ops->auth)
7365                 return -EOPNOTSUPP;
7366
7367         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7368             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7369                 return -EOPNOTSUPP;
7370
7371         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7372         chan = nl80211_get_valid_chan(&rdev->wiphy,
7373                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7374         if (!chan)
7375                 return -EINVAL;
7376
7377         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7378         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7379
7380         if (info->attrs[NL80211_ATTR_IE]) {
7381                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7382                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7383         }
7384
7385         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7386         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7387                 return -EINVAL;
7388
7389         if (auth_type == NL80211_AUTHTYPE_SAE &&
7390             !info->attrs[NL80211_ATTR_SAE_DATA])
7391                 return -EINVAL;
7392
7393         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7394                 if (auth_type != NL80211_AUTHTYPE_SAE)
7395                         return -EINVAL;
7396                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7397                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7398                 /* need to include at least Auth Transaction and Status Code */
7399                 if (sae_data_len < 4)
7400                         return -EINVAL;
7401         }
7402
7403         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7404
7405         /*
7406          * Since we no longer track auth state, ignore
7407          * requests to only change local state.
7408          */
7409         if (local_state_change)
7410                 return 0;
7411
7412         wdev_lock(dev->ieee80211_ptr);
7413         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7414                                  ssid, ssid_len, ie, ie_len,
7415                                  key.p.key, key.p.key_len, key.idx,
7416                                  sae_data, sae_data_len);
7417         wdev_unlock(dev->ieee80211_ptr);
7418         return err;
7419 }
7420
7421 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7422                                    struct genl_info *info,
7423                                    struct cfg80211_crypto_settings *settings,
7424                                    int cipher_limit)
7425 {
7426         memset(settings, 0, sizeof(*settings));
7427
7428         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7429
7430         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7431                 u16 proto;
7432
7433                 proto = nla_get_u16(
7434                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7435                 settings->control_port_ethertype = cpu_to_be16(proto);
7436                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7437                     proto != ETH_P_PAE)
7438                         return -EINVAL;
7439                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7440                         settings->control_port_no_encrypt = true;
7441         } else
7442                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7443
7444         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7445                 void *data;
7446                 int len, i;
7447
7448                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7449                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7450                 settings->n_ciphers_pairwise = len / sizeof(u32);
7451
7452                 if (len % sizeof(u32))
7453                         return -EINVAL;
7454
7455                 if (settings->n_ciphers_pairwise > cipher_limit)
7456                         return -EINVAL;
7457
7458                 memcpy(settings->ciphers_pairwise, data, len);
7459
7460                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7461                         if (!cfg80211_supported_cipher_suite(
7462                                         &rdev->wiphy,
7463                                         settings->ciphers_pairwise[i]))
7464                                 return -EINVAL;
7465         }
7466
7467         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7468                 settings->cipher_group =
7469                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7470                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7471                                                      settings->cipher_group))
7472                         return -EINVAL;
7473         }
7474
7475         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7476                 settings->wpa_versions =
7477                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7478                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7479                         return -EINVAL;
7480         }
7481
7482         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7483                 void *data;
7484                 int len;
7485
7486                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7487                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7488                 settings->n_akm_suites = len / sizeof(u32);
7489
7490                 if (len % sizeof(u32))
7491                         return -EINVAL;
7492
7493                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7494                         return -EINVAL;
7495
7496                 memcpy(settings->akm_suites, data, len);
7497         }
7498
7499         return 0;
7500 }
7501
7502 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7503 {
7504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7505         struct net_device *dev = info->user_ptr[1];
7506         struct ieee80211_channel *chan;
7507         struct cfg80211_assoc_request req = {};
7508         const u8 *bssid, *ssid;
7509         int err, ssid_len = 0;
7510
7511         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7512                 return -EINVAL;
7513
7514         if (!info->attrs[NL80211_ATTR_MAC] ||
7515             !info->attrs[NL80211_ATTR_SSID] ||
7516             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7517                 return -EINVAL;
7518
7519         if (!rdev->ops->assoc)
7520                 return -EOPNOTSUPP;
7521
7522         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7523             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7524                 return -EOPNOTSUPP;
7525
7526         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7527
7528         chan = nl80211_get_valid_chan(&rdev->wiphy,
7529                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7530         if (!chan)
7531                 return -EINVAL;
7532
7533         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7534         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7535
7536         if (info->attrs[NL80211_ATTR_IE]) {
7537                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7538                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7539         }
7540
7541         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7542                 enum nl80211_mfp mfp =
7543                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7544                 if (mfp == NL80211_MFP_REQUIRED)
7545                         req.use_mfp = true;
7546                 else if (mfp != NL80211_MFP_NO)
7547                         return -EINVAL;
7548         }
7549
7550         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7551                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7552
7553         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7554                 req.flags |= ASSOC_REQ_DISABLE_HT;
7555
7556         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7557                 memcpy(&req.ht_capa_mask,
7558                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7559                        sizeof(req.ht_capa_mask));
7560
7561         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7562                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7563                         return -EINVAL;
7564                 memcpy(&req.ht_capa,
7565                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7566                        sizeof(req.ht_capa));
7567         }
7568
7569         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7570                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7571
7572         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7573                 memcpy(&req.vht_capa_mask,
7574                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7575                        sizeof(req.vht_capa_mask));
7576
7577         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7578                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7579                         return -EINVAL;
7580                 memcpy(&req.vht_capa,
7581                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7582                        sizeof(req.vht_capa));
7583         }
7584
7585         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7586                 if (!((rdev->wiphy.features &
7587                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7588                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7589                     !wiphy_ext_feature_isset(&rdev->wiphy,
7590                                              NL80211_EXT_FEATURE_RRM))
7591                         return -EINVAL;
7592                 req.flags |= ASSOC_REQ_USE_RRM;
7593         }
7594
7595         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7596         if (!err) {
7597                 wdev_lock(dev->ieee80211_ptr);
7598                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7599                                           ssid, ssid_len, &req);
7600                 wdev_unlock(dev->ieee80211_ptr);
7601         }
7602
7603         return err;
7604 }
7605
7606 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7607 {
7608         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7609         struct net_device *dev = info->user_ptr[1];
7610         const u8 *ie = NULL, *bssid;
7611         int ie_len = 0, err;
7612         u16 reason_code;
7613         bool local_state_change;
7614
7615         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7616                 return -EINVAL;
7617
7618         if (!info->attrs[NL80211_ATTR_MAC])
7619                 return -EINVAL;
7620
7621         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7622                 return -EINVAL;
7623
7624         if (!rdev->ops->deauth)
7625                 return -EOPNOTSUPP;
7626
7627         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7628             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7629                 return -EOPNOTSUPP;
7630
7631         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7632
7633         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7634         if (reason_code == 0) {
7635                 /* Reason Code 0 is reserved */
7636                 return -EINVAL;
7637         }
7638
7639         if (info->attrs[NL80211_ATTR_IE]) {
7640                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7641                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7642         }
7643
7644         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7645
7646         wdev_lock(dev->ieee80211_ptr);
7647         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7648                                    local_state_change);
7649         wdev_unlock(dev->ieee80211_ptr);
7650         return err;
7651 }
7652
7653 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7654 {
7655         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7656         struct net_device *dev = info->user_ptr[1];
7657         const u8 *ie = NULL, *bssid;
7658         int ie_len = 0, err;
7659         u16 reason_code;
7660         bool local_state_change;
7661
7662         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7663                 return -EINVAL;
7664
7665         if (!info->attrs[NL80211_ATTR_MAC])
7666                 return -EINVAL;
7667
7668         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7669                 return -EINVAL;
7670
7671         if (!rdev->ops->disassoc)
7672                 return -EOPNOTSUPP;
7673
7674         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7675             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7676                 return -EOPNOTSUPP;
7677
7678         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7679
7680         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7681         if (reason_code == 0) {
7682                 /* Reason Code 0 is reserved */
7683                 return -EINVAL;
7684         }
7685
7686         if (info->attrs[NL80211_ATTR_IE]) {
7687                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7688                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7689         }
7690
7691         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7692
7693         wdev_lock(dev->ieee80211_ptr);
7694         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7695                                      local_state_change);
7696         wdev_unlock(dev->ieee80211_ptr);
7697         return err;
7698 }
7699
7700 static bool
7701 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7702                          int mcast_rate[NUM_NL80211_BANDS],
7703                          int rateval)
7704 {
7705         struct wiphy *wiphy = &rdev->wiphy;
7706         bool found = false;
7707         int band, i;
7708
7709         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7710                 struct ieee80211_supported_band *sband;
7711
7712                 sband = wiphy->bands[band];
7713                 if (!sband)
7714                         continue;
7715
7716                 for (i = 0; i < sband->n_bitrates; i++) {
7717                         if (sband->bitrates[i].bitrate == rateval) {
7718                                 mcast_rate[band] = i + 1;
7719                                 found = true;
7720                                 break;
7721                         }
7722                 }
7723         }
7724
7725         return found;
7726 }
7727
7728 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7729 {
7730         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7731         struct net_device *dev = info->user_ptr[1];
7732         struct cfg80211_ibss_params ibss;
7733         struct wiphy *wiphy;
7734         struct cfg80211_cached_keys *connkeys = NULL;
7735         int err;
7736
7737         memset(&ibss, 0, sizeof(ibss));
7738
7739         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7740                 return -EINVAL;
7741
7742         if (!info->attrs[NL80211_ATTR_SSID] ||
7743             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7744                 return -EINVAL;
7745
7746         ibss.beacon_interval = 100;
7747
7748         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7749                 ibss.beacon_interval =
7750                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7751                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7752                         return -EINVAL;
7753         }
7754
7755         if (!rdev->ops->join_ibss)
7756                 return -EOPNOTSUPP;
7757
7758         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7759                 return -EOPNOTSUPP;
7760
7761         wiphy = &rdev->wiphy;
7762
7763         if (info->attrs[NL80211_ATTR_MAC]) {
7764                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7765
7766                 if (!is_valid_ether_addr(ibss.bssid))
7767                         return -EINVAL;
7768         }
7769         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7770         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7771
7772         if (info->attrs[NL80211_ATTR_IE]) {
7773                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7774                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7775         }
7776
7777         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7778         if (err)
7779                 return err;
7780
7781         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7782                                      NL80211_IFTYPE_ADHOC))
7783                 return -EINVAL;
7784
7785         switch (ibss.chandef.width) {
7786         case NL80211_CHAN_WIDTH_5:
7787         case NL80211_CHAN_WIDTH_10:
7788         case NL80211_CHAN_WIDTH_20_NOHT:
7789                 break;
7790         case NL80211_CHAN_WIDTH_20:
7791         case NL80211_CHAN_WIDTH_40:
7792                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7793                         return -EINVAL;
7794                 break;
7795         case NL80211_CHAN_WIDTH_80:
7796         case NL80211_CHAN_WIDTH_80P80:
7797         case NL80211_CHAN_WIDTH_160:
7798                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7799                         return -EINVAL;
7800                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7801                                              NL80211_EXT_FEATURE_VHT_IBSS))
7802                         return -EINVAL;
7803                 break;
7804         default:
7805                 return -EINVAL;
7806         }
7807
7808         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7809         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7810
7811         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7812                 u8 *rates =
7813                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7814                 int n_rates =
7815                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7816                 struct ieee80211_supported_band *sband =
7817                         wiphy->bands[ibss.chandef.chan->band];
7818
7819                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7820                                              &ibss.basic_rates);
7821                 if (err)
7822                         return err;
7823         }
7824
7825         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7826                 memcpy(&ibss.ht_capa_mask,
7827                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7828                        sizeof(ibss.ht_capa_mask));
7829
7830         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7831                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7832                         return -EINVAL;
7833                 memcpy(&ibss.ht_capa,
7834                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7835                        sizeof(ibss.ht_capa));
7836         }
7837
7838         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7839             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7840                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7841                 return -EINVAL;
7842
7843         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7844                 bool no_ht = false;
7845
7846                 connkeys = nl80211_parse_connkeys(rdev,
7847                                           info->attrs[NL80211_ATTR_KEYS],
7848                                           &no_ht);
7849                 if (IS_ERR(connkeys))
7850                         return PTR_ERR(connkeys);
7851
7852                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7853                     no_ht) {
7854                         kzfree(connkeys);
7855                         return -EINVAL;
7856                 }
7857         }
7858
7859         ibss.control_port =
7860                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7861
7862         ibss.userspace_handles_dfs =
7863                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7864
7865         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7866         if (err)
7867                 kzfree(connkeys);
7868         return err;
7869 }
7870
7871 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7872 {
7873         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7874         struct net_device *dev = info->user_ptr[1];
7875
7876         if (!rdev->ops->leave_ibss)
7877                 return -EOPNOTSUPP;
7878
7879         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7880                 return -EOPNOTSUPP;
7881
7882         return cfg80211_leave_ibss(rdev, dev, false);
7883 }
7884
7885 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7886 {
7887         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7888         struct net_device *dev = info->user_ptr[1];
7889         int mcast_rate[NUM_NL80211_BANDS];
7890         u32 nla_rate;
7891         int err;
7892
7893         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7894             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7895             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7896                 return -EOPNOTSUPP;
7897
7898         if (!rdev->ops->set_mcast_rate)
7899                 return -EOPNOTSUPP;
7900
7901         memset(mcast_rate, 0, sizeof(mcast_rate));
7902
7903         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7904                 return -EINVAL;
7905
7906         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7907         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7908                 return -EINVAL;
7909
7910         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7911
7912         return err;
7913 }
7914
7915 static struct sk_buff *
7916 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7917                             struct wireless_dev *wdev, int approxlen,
7918                             u32 portid, u32 seq, enum nl80211_commands cmd,
7919                             enum nl80211_attrs attr,
7920                             const struct nl80211_vendor_cmd_info *info,
7921                             gfp_t gfp)
7922 {
7923         struct sk_buff *skb;
7924         void *hdr;
7925         struct nlattr *data;
7926
7927         skb = nlmsg_new(approxlen + 100, gfp);
7928         if (!skb)
7929                 return NULL;
7930
7931         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7932         if (!hdr) {
7933                 kfree_skb(skb);
7934                 return NULL;
7935         }
7936
7937         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7938                 goto nla_put_failure;
7939
7940         if (info) {
7941                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7942                                 info->vendor_id))
7943                         goto nla_put_failure;
7944                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7945                                 info->subcmd))
7946                         goto nla_put_failure;
7947         }
7948
7949         if (wdev) {
7950                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
7951                                       wdev_id(wdev), NL80211_ATTR_PAD))
7952                         goto nla_put_failure;
7953                 if (wdev->netdev &&
7954                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7955                                 wdev->netdev->ifindex))
7956                         goto nla_put_failure;
7957         }
7958
7959         data = nla_nest_start(skb, attr);
7960
7961         ((void **)skb->cb)[0] = rdev;
7962         ((void **)skb->cb)[1] = hdr;
7963         ((void **)skb->cb)[2] = data;
7964
7965         return skb;
7966
7967  nla_put_failure:
7968         kfree_skb(skb);
7969         return NULL;
7970 }
7971
7972 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7973                                            struct wireless_dev *wdev,
7974                                            enum nl80211_commands cmd,
7975                                            enum nl80211_attrs attr,
7976                                            int vendor_event_idx,
7977                                            int approxlen, gfp_t gfp)
7978 {
7979         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7980         const struct nl80211_vendor_cmd_info *info;
7981
7982         switch (cmd) {
7983         case NL80211_CMD_TESTMODE:
7984                 if (WARN_ON(vendor_event_idx != -1))
7985                         return NULL;
7986                 info = NULL;
7987                 break;
7988         case NL80211_CMD_VENDOR:
7989                 if (WARN_ON(vendor_event_idx < 0 ||
7990                             vendor_event_idx >= wiphy->n_vendor_events))
7991                         return NULL;
7992                 info = &wiphy->vendor_events[vendor_event_idx];
7993                 break;
7994         default:
7995                 WARN_ON(1);
7996                 return NULL;
7997         }
7998
7999         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8000                                            cmd, attr, info, gfp);
8001 }
8002 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8003
8004 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8005 {
8006         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8007         void *hdr = ((void **)skb->cb)[1];
8008         struct nlattr *data = ((void **)skb->cb)[2];
8009         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8010
8011         /* clear CB data for netlink core to own from now on */
8012         memset(skb->cb, 0, sizeof(skb->cb));
8013
8014         nla_nest_end(skb, data);
8015         genlmsg_end(skb, hdr);
8016
8017         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8018                 mcgrp = NL80211_MCGRP_VENDOR;
8019
8020         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8021                                 mcgrp, gfp);
8022 }
8023 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8024
8025 #ifdef CONFIG_NL80211_TESTMODE
8026 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8027 {
8028         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8029         struct wireless_dev *wdev =
8030                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8031         int err;
8032
8033         if (!rdev->ops->testmode_cmd)
8034                 return -EOPNOTSUPP;
8035
8036         if (IS_ERR(wdev)) {
8037                 err = PTR_ERR(wdev);
8038                 if (err != -EINVAL)
8039                         return err;
8040                 wdev = NULL;
8041         } else if (wdev->wiphy != &rdev->wiphy) {
8042                 return -EINVAL;
8043         }
8044
8045         if (!info->attrs[NL80211_ATTR_TESTDATA])
8046                 return -EINVAL;
8047
8048         rdev->cur_cmd_info = info;
8049         err = rdev_testmode_cmd(rdev, wdev,
8050                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8051                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8052         rdev->cur_cmd_info = NULL;
8053
8054         return err;
8055 }
8056
8057 static int nl80211_testmode_dump(struct sk_buff *skb,
8058                                  struct netlink_callback *cb)
8059 {
8060         struct cfg80211_registered_device *rdev;
8061         int err;
8062         long phy_idx;
8063         void *data = NULL;
8064         int data_len = 0;
8065
8066         rtnl_lock();
8067
8068         if (cb->args[0]) {
8069                 /*
8070                  * 0 is a valid index, but not valid for args[0],
8071                  * so we need to offset by 1.
8072                  */
8073                 phy_idx = cb->args[0] - 1;
8074         } else {
8075                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8076                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
8077                                   nl80211_policy);
8078                 if (err)
8079                         goto out_err;
8080
8081                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
8082                                                   nl80211_fam.attrbuf);
8083                 if (IS_ERR(rdev)) {
8084                         err = PTR_ERR(rdev);
8085                         goto out_err;
8086                 }
8087                 phy_idx = rdev->wiphy_idx;
8088                 rdev = NULL;
8089
8090                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
8091                         cb->args[1] =
8092                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
8093         }
8094
8095         if (cb->args[1]) {
8096                 data = nla_data((void *)cb->args[1]);
8097                 data_len = nla_len((void *)cb->args[1]);
8098         }
8099
8100         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8101         if (!rdev) {
8102                 err = -ENOENT;
8103                 goto out_err;
8104         }
8105
8106         if (!rdev->ops->testmode_dump) {
8107                 err = -EOPNOTSUPP;
8108                 goto out_err;
8109         }
8110
8111         while (1) {
8112                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8113                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8114                                            NL80211_CMD_TESTMODE);
8115                 struct nlattr *tmdata;
8116
8117                 if (!hdr)
8118                         break;
8119
8120                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8121                         genlmsg_cancel(skb, hdr);
8122                         break;
8123                 }
8124
8125                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8126                 if (!tmdata) {
8127                         genlmsg_cancel(skb, hdr);
8128                         break;
8129                 }
8130                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8131                 nla_nest_end(skb, tmdata);
8132
8133                 if (err == -ENOBUFS || err == -ENOENT) {
8134                         genlmsg_cancel(skb, hdr);
8135                         break;
8136                 } else if (err) {
8137                         genlmsg_cancel(skb, hdr);
8138                         goto out_err;
8139                 }
8140
8141                 genlmsg_end(skb, hdr);
8142         }
8143
8144         err = skb->len;
8145         /* see above */
8146         cb->args[0] = phy_idx + 1;
8147  out_err:
8148         rtnl_unlock();
8149         return err;
8150 }
8151 #endif
8152
8153 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8154 {
8155         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8156         struct net_device *dev = info->user_ptr[1];
8157         struct cfg80211_connect_params connect;
8158         struct wiphy *wiphy;
8159         struct cfg80211_cached_keys *connkeys = NULL;
8160         int err;
8161
8162         memset(&connect, 0, sizeof(connect));
8163
8164         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8165                 return -EINVAL;
8166
8167         if (!info->attrs[NL80211_ATTR_SSID] ||
8168             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8169                 return -EINVAL;
8170
8171         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8172                 connect.auth_type =
8173                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8174                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8175                                              NL80211_CMD_CONNECT))
8176                         return -EINVAL;
8177         } else
8178                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8179
8180         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8181
8182         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8183                                       NL80211_MAX_NR_CIPHER_SUITES);
8184         if (err)
8185                 return err;
8186
8187         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8188             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8189                 return -EOPNOTSUPP;
8190
8191         wiphy = &rdev->wiphy;
8192
8193         connect.bg_scan_period = -1;
8194         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8195                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8196                 connect.bg_scan_period =
8197                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8198         }
8199
8200         if (info->attrs[NL80211_ATTR_MAC])
8201                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8202         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8203                 connect.bssid_hint =
8204                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8205         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8206         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8207
8208         if (info->attrs[NL80211_ATTR_IE]) {
8209                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8210                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8211         }
8212
8213         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8214                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8215                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8216                     connect.mfp != NL80211_MFP_NO)
8217                         return -EINVAL;
8218         } else {
8219                 connect.mfp = NL80211_MFP_NO;
8220         }
8221
8222         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8223                 connect.prev_bssid =
8224                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8225
8226         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8227                 connect.channel = nl80211_get_valid_chan(
8228                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8229                 if (!connect.channel)
8230                         return -EINVAL;
8231         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8232                 connect.channel_hint = nl80211_get_valid_chan(
8233                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8234                 if (!connect.channel_hint)
8235                         return -EINVAL;
8236         }
8237
8238         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8239                 connkeys = nl80211_parse_connkeys(rdev,
8240                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8241                 if (IS_ERR(connkeys))
8242                         return PTR_ERR(connkeys);
8243         }
8244
8245         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8246                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8247
8248         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8249                 memcpy(&connect.ht_capa_mask,
8250                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8251                        sizeof(connect.ht_capa_mask));
8252
8253         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8254                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8255                         kzfree(connkeys);
8256                         return -EINVAL;
8257                 }
8258                 memcpy(&connect.ht_capa,
8259                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8260                        sizeof(connect.ht_capa));
8261         }
8262
8263         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8264                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8265
8266         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8267                 memcpy(&connect.vht_capa_mask,
8268                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8269                        sizeof(connect.vht_capa_mask));
8270
8271         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8272                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8273                         kzfree(connkeys);
8274                         return -EINVAL;
8275                 }
8276                 memcpy(&connect.vht_capa,
8277                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8278                        sizeof(connect.vht_capa));
8279         }
8280
8281         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8282                 if (!((rdev->wiphy.features &
8283                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8284                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8285                     !wiphy_ext_feature_isset(&rdev->wiphy,
8286                                              NL80211_EXT_FEATURE_RRM)) {
8287                         kzfree(connkeys);
8288                         return -EINVAL;
8289                 }
8290                 connect.flags |= ASSOC_REQ_USE_RRM;
8291         }
8292
8293         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8294         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8295                 kzfree(connkeys);
8296                 return -EOPNOTSUPP;
8297         }
8298
8299         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8300                 /* bss selection makes no sense if bssid is set */
8301                 if (connect.bssid) {
8302                         kzfree(connkeys);
8303                         return -EINVAL;
8304                 }
8305
8306                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8307                                        wiphy, &connect.bss_select);
8308                 if (err) {
8309                         kzfree(connkeys);
8310                         return err;
8311                 }
8312         }
8313
8314         wdev_lock(dev->ieee80211_ptr);
8315         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8316                                connect.prev_bssid);
8317         wdev_unlock(dev->ieee80211_ptr);
8318         if (err)
8319                 kzfree(connkeys);
8320         return err;
8321 }
8322
8323 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8324 {
8325         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8326         struct net_device *dev = info->user_ptr[1];
8327         u16 reason;
8328         int ret;
8329
8330         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8331                 reason = WLAN_REASON_DEAUTH_LEAVING;
8332         else
8333                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8334
8335         if (reason == 0)
8336                 return -EINVAL;
8337
8338         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8339             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8340                 return -EOPNOTSUPP;
8341
8342         wdev_lock(dev->ieee80211_ptr);
8343         ret = cfg80211_disconnect(rdev, dev, reason, true);
8344         wdev_unlock(dev->ieee80211_ptr);
8345         return ret;
8346 }
8347
8348 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8349 {
8350         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8351         struct net *net;
8352         int err;
8353
8354         if (info->attrs[NL80211_ATTR_PID]) {
8355                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8356
8357                 net = get_net_ns_by_pid(pid);
8358         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8359                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8360
8361                 net = get_net_ns_by_fd(fd);
8362         } else {
8363                 return -EINVAL;
8364         }
8365
8366         if (IS_ERR(net))
8367                 return PTR_ERR(net);
8368
8369         err = 0;
8370
8371         /* check if anything to do */
8372         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8373                 err = cfg80211_switch_netns(rdev, net);
8374
8375         put_net(net);
8376         return err;
8377 }
8378
8379 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8380 {
8381         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8382         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8383                         struct cfg80211_pmksa *pmksa) = NULL;
8384         struct net_device *dev = info->user_ptr[1];
8385         struct cfg80211_pmksa pmksa;
8386
8387         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8388
8389         if (!info->attrs[NL80211_ATTR_MAC])
8390                 return -EINVAL;
8391
8392         if (!info->attrs[NL80211_ATTR_PMKID])
8393                 return -EINVAL;
8394
8395         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8396         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8397
8398         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8399             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8400                 return -EOPNOTSUPP;
8401
8402         switch (info->genlhdr->cmd) {
8403         case NL80211_CMD_SET_PMKSA:
8404                 rdev_ops = rdev->ops->set_pmksa;
8405                 break;
8406         case NL80211_CMD_DEL_PMKSA:
8407                 rdev_ops = rdev->ops->del_pmksa;
8408                 break;
8409         default:
8410                 WARN_ON(1);
8411                 break;
8412         }
8413
8414         if (!rdev_ops)
8415                 return -EOPNOTSUPP;
8416
8417         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8418 }
8419
8420 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8421 {
8422         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8423         struct net_device *dev = info->user_ptr[1];
8424
8425         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8426             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8427                 return -EOPNOTSUPP;
8428
8429         if (!rdev->ops->flush_pmksa)
8430                 return -EOPNOTSUPP;
8431
8432         return rdev_flush_pmksa(rdev, dev);
8433 }
8434
8435 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8436 {
8437         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8438         struct net_device *dev = info->user_ptr[1];
8439         u8 action_code, dialog_token;
8440         u32 peer_capability = 0;
8441         u16 status_code;
8442         u8 *peer;
8443         bool initiator;
8444
8445         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8446             !rdev->ops->tdls_mgmt)
8447                 return -EOPNOTSUPP;
8448
8449         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8450             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8451             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8452             !info->attrs[NL80211_ATTR_IE] ||
8453             !info->attrs[NL80211_ATTR_MAC])
8454                 return -EINVAL;
8455
8456         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8457         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8458         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8459         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8460         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8461         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8462                 peer_capability =
8463                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8464
8465         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8466                               dialog_token, status_code, peer_capability,
8467                               initiator,
8468                               nla_data(info->attrs[NL80211_ATTR_IE]),
8469                               nla_len(info->attrs[NL80211_ATTR_IE]));
8470 }
8471
8472 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8473 {
8474         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8475         struct net_device *dev = info->user_ptr[1];
8476         enum nl80211_tdls_operation operation;
8477         u8 *peer;
8478
8479         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8480             !rdev->ops->tdls_oper)
8481                 return -EOPNOTSUPP;
8482
8483         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8484             !info->attrs[NL80211_ATTR_MAC])
8485                 return -EINVAL;
8486
8487         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8488         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8489
8490         return rdev_tdls_oper(rdev, dev, peer, operation);
8491 }
8492
8493 static int nl80211_remain_on_channel(struct sk_buff *skb,
8494                                      struct genl_info *info)
8495 {
8496         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8497         struct wireless_dev *wdev = info->user_ptr[1];
8498         struct cfg80211_chan_def chandef;
8499         struct sk_buff *msg;
8500         void *hdr;
8501         u64 cookie;
8502         u32 duration;
8503         int err;
8504
8505         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8506             !info->attrs[NL80211_ATTR_DURATION])
8507                 return -EINVAL;
8508
8509         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8510
8511         if (!rdev->ops->remain_on_channel ||
8512             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8513                 return -EOPNOTSUPP;
8514
8515         /*
8516          * We should be on that channel for at least a minimum amount of
8517          * time (10ms) but no longer than the driver supports.
8518          */
8519         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8520             duration > rdev->wiphy.max_remain_on_channel_duration)
8521                 return -EINVAL;
8522
8523         err = nl80211_parse_chandef(rdev, info, &chandef);
8524         if (err)
8525                 return err;
8526
8527         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8528         if (!msg)
8529                 return -ENOMEM;
8530
8531         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8532                              NL80211_CMD_REMAIN_ON_CHANNEL);
8533         if (!hdr) {
8534                 err = -ENOBUFS;
8535                 goto free_msg;
8536         }
8537
8538         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8539                                      duration, &cookie);
8540
8541         if (err)
8542                 goto free_msg;
8543
8544         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8545                               NL80211_ATTR_PAD))
8546                 goto nla_put_failure;
8547
8548         genlmsg_end(msg, hdr);
8549
8550         return genlmsg_reply(msg, info);
8551
8552  nla_put_failure:
8553         err = -ENOBUFS;
8554  free_msg:
8555         nlmsg_free(msg);
8556         return err;
8557 }
8558
8559 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8560                                             struct genl_info *info)
8561 {
8562         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8563         struct wireless_dev *wdev = info->user_ptr[1];
8564         u64 cookie;
8565
8566         if (!info->attrs[NL80211_ATTR_COOKIE])
8567                 return -EINVAL;
8568
8569         if (!rdev->ops->cancel_remain_on_channel)
8570                 return -EOPNOTSUPP;
8571
8572         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8573
8574         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8575 }
8576
8577 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8578                            u8 *rates, u8 rates_len)
8579 {
8580         u8 i;
8581         u32 mask = 0;
8582
8583         for (i = 0; i < rates_len; i++) {
8584                 int rate = (rates[i] & 0x7f) * 5;
8585                 int ridx;
8586
8587                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8588                         struct ieee80211_rate *srate =
8589                                 &sband->bitrates[ridx];
8590                         if (rate == srate->bitrate) {
8591                                 mask |= 1 << ridx;
8592                                 break;
8593                         }
8594                 }
8595                 if (ridx == sband->n_bitrates)
8596                         return 0; /* rate not found */
8597         }
8598
8599         return mask;
8600 }
8601
8602 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8603                                u8 *rates, u8 rates_len,
8604                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8605 {
8606         u8 i;
8607
8608         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8609
8610         for (i = 0; i < rates_len; i++) {
8611                 int ridx, rbit;
8612
8613                 ridx = rates[i] / 8;
8614                 rbit = BIT(rates[i] % 8);
8615
8616                 /* check validity */
8617                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8618                         return false;
8619
8620                 /* check availability */
8621                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8622                         mcs[ridx] |= rbit;
8623                 else
8624                         return false;
8625         }
8626
8627         return true;
8628 }
8629
8630 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8631 {
8632         u16 mcs_mask = 0;
8633
8634         switch (vht_mcs_map) {
8635         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8636                 break;
8637         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8638                 mcs_mask = 0x00FF;
8639                 break;
8640         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8641                 mcs_mask = 0x01FF;
8642                 break;
8643         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8644                 mcs_mask = 0x03FF;
8645                 break;
8646         default:
8647                 break;
8648         }
8649
8650         return mcs_mask;
8651 }
8652
8653 static void vht_build_mcs_mask(u16 vht_mcs_map,
8654                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8655 {
8656         u8 nss;
8657
8658         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8659                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8660                 vht_mcs_map >>= 2;
8661         }
8662 }
8663
8664 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8665                              struct nl80211_txrate_vht *txrate,
8666                              u16 mcs[NL80211_VHT_NSS_MAX])
8667 {
8668         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8669         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8670         u8 i;
8671
8672         if (!sband->vht_cap.vht_supported)
8673                 return false;
8674
8675         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8676
8677         /* Build vht_mcs_mask from VHT capabilities */
8678         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8679
8680         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8681                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8682                         mcs[i] = txrate->mcs[i];
8683                 else
8684                         return false;
8685         }
8686
8687         return true;
8688 }
8689
8690 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8691         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8692                                     .len = NL80211_MAX_SUPP_RATES },
8693         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8694                                 .len = NL80211_MAX_SUPP_HT_RATES },
8695         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8696         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8697 };
8698
8699 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8700                                        struct genl_info *info)
8701 {
8702         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8703         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8704         struct cfg80211_bitrate_mask mask;
8705         int rem, i;
8706         struct net_device *dev = info->user_ptr[1];
8707         struct nlattr *tx_rates;
8708         struct ieee80211_supported_band *sband;
8709         u16 vht_tx_mcs_map;
8710
8711         if (!rdev->ops->set_bitrate_mask)
8712                 return -EOPNOTSUPP;
8713
8714         memset(&mask, 0, sizeof(mask));
8715         /* Default to all rates enabled */
8716         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8717                 sband = rdev->wiphy.bands[i];
8718
8719                 if (!sband)
8720                         continue;
8721
8722                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8723                 memcpy(mask.control[i].ht_mcs,
8724                        sband->ht_cap.mcs.rx_mask,
8725                        sizeof(mask.control[i].ht_mcs));
8726
8727                 if (!sband->vht_cap.vht_supported)
8728                         continue;
8729
8730                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8731                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8732         }
8733
8734         /* if no rates are given set it back to the defaults */
8735         if (!info->attrs[NL80211_ATTR_TX_RATES])
8736                 goto out;
8737
8738         /*
8739          * The nested attribute uses enum nl80211_band as the index. This maps
8740          * directly to the enum nl80211_band values used in cfg80211.
8741          */
8742         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8743         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8744                 enum nl80211_band band = nla_type(tx_rates);
8745                 int err;
8746
8747                 if (band < 0 || band >= NUM_NL80211_BANDS)
8748                         return -EINVAL;
8749                 sband = rdev->wiphy.bands[band];
8750                 if (sband == NULL)
8751                         return -EINVAL;
8752                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8753                                 nla_len(tx_rates), nl80211_txattr_policy);
8754                 if (err)
8755                         return err;
8756                 if (tb[NL80211_TXRATE_LEGACY]) {
8757                         mask.control[band].legacy = rateset_to_mask(
8758                                 sband,
8759                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8760                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8761                         if ((mask.control[band].legacy == 0) &&
8762                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8763                                 return -EINVAL;
8764                 }
8765                 if (tb[NL80211_TXRATE_HT]) {
8766                         if (!ht_rateset_to_mask(
8767                                         sband,
8768                                         nla_data(tb[NL80211_TXRATE_HT]),
8769                                         nla_len(tb[NL80211_TXRATE_HT]),
8770                                         mask.control[band].ht_mcs))
8771                                 return -EINVAL;
8772                 }
8773                 if (tb[NL80211_TXRATE_VHT]) {
8774                         if (!vht_set_mcs_mask(
8775                                         sband,
8776                                         nla_data(tb[NL80211_TXRATE_VHT]),
8777                                         mask.control[band].vht_mcs))
8778                                 return -EINVAL;
8779                 }
8780                 if (tb[NL80211_TXRATE_GI]) {
8781                         mask.control[band].gi =
8782                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8783                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8784                                 return -EINVAL;
8785                 }
8786
8787                 if (mask.control[band].legacy == 0) {
8788                         /* don't allow empty legacy rates if HT or VHT
8789                          * are not even supported.
8790                          */
8791                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8792                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8793                                 return -EINVAL;
8794
8795                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8796                                 if (mask.control[band].ht_mcs[i])
8797                                         goto out;
8798
8799                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8800                                 if (mask.control[band].vht_mcs[i])
8801                                         goto out;
8802
8803                         /* legacy and mcs rates may not be both empty */
8804                         return -EINVAL;
8805                 }
8806         }
8807
8808 out:
8809         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8810 }
8811
8812 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8813 {
8814         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8815         struct wireless_dev *wdev = info->user_ptr[1];
8816         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8817
8818         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8819                 return -EINVAL;
8820
8821         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8822                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8823
8824         switch (wdev->iftype) {
8825         case NL80211_IFTYPE_STATION:
8826         case NL80211_IFTYPE_ADHOC:
8827         case NL80211_IFTYPE_P2P_CLIENT:
8828         case NL80211_IFTYPE_AP:
8829         case NL80211_IFTYPE_AP_VLAN:
8830         case NL80211_IFTYPE_MESH_POINT:
8831         case NL80211_IFTYPE_P2P_GO:
8832         case NL80211_IFTYPE_P2P_DEVICE:
8833                 break;
8834         default:
8835                 return -EOPNOTSUPP;
8836         }
8837
8838         /* not much point in registering if we can't reply */
8839         if (!rdev->ops->mgmt_tx)
8840                 return -EOPNOTSUPP;
8841
8842         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8843                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8844                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8845 }
8846
8847 static int nl80211_tx_mgmt(struct sk_buff *skb, 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         struct cfg80211_chan_def chandef;
8852         int err;
8853         void *hdr = NULL;
8854         u64 cookie;
8855         struct sk_buff *msg = NULL;
8856         struct cfg80211_mgmt_tx_params params = {
8857                 .dont_wait_for_ack =
8858                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8859         };
8860
8861         if (!info->attrs[NL80211_ATTR_FRAME])
8862                 return -EINVAL;
8863
8864         if (!rdev->ops->mgmt_tx)
8865                 return -EOPNOTSUPP;
8866
8867         switch (wdev->iftype) {
8868         case NL80211_IFTYPE_P2P_DEVICE:
8869                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8870                         return -EINVAL;
8871         case NL80211_IFTYPE_STATION:
8872         case NL80211_IFTYPE_ADHOC:
8873         case NL80211_IFTYPE_P2P_CLIENT:
8874         case NL80211_IFTYPE_AP:
8875         case NL80211_IFTYPE_AP_VLAN:
8876         case NL80211_IFTYPE_MESH_POINT:
8877         case NL80211_IFTYPE_P2P_GO:
8878                 break;
8879         default:
8880                 return -EOPNOTSUPP;
8881         }
8882
8883         if (info->attrs[NL80211_ATTR_DURATION]) {
8884                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8885                         return -EINVAL;
8886                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8887
8888                 /*
8889                  * We should wait on the channel for at least a minimum amount
8890                  * of time (10ms) but no longer than the driver supports.
8891                  */
8892                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8893                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8894                         return -EINVAL;
8895         }
8896
8897         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8898
8899         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8900                 return -EINVAL;
8901
8902         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8903
8904         /* get the channel if any has been specified, otherwise pass NULL to
8905          * the driver. The latter will use the current one
8906          */
8907         chandef.chan = NULL;
8908         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8909                 err = nl80211_parse_chandef(rdev, info, &chandef);
8910                 if (err)
8911                         return err;
8912         }
8913
8914         if (!chandef.chan && params.offchan)
8915                 return -EINVAL;
8916
8917         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8918         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8919
8920         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8921                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8922                 int i;
8923
8924                 if (len % sizeof(u16))
8925                         return -EINVAL;
8926
8927                 params.n_csa_offsets = len / sizeof(u16);
8928                 params.csa_offsets =
8929                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8930
8931                 /* check that all the offsets fit the frame */
8932                 for (i = 0; i < params.n_csa_offsets; i++) {
8933                         if (params.csa_offsets[i] >= params.len)
8934                                 return -EINVAL;
8935                 }
8936         }
8937
8938         if (!params.dont_wait_for_ack) {
8939                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8940                 if (!msg)
8941                         return -ENOMEM;
8942
8943                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8944                                      NL80211_CMD_FRAME);
8945                 if (!hdr) {
8946                         err = -ENOBUFS;
8947                         goto free_msg;
8948                 }
8949         }
8950
8951         params.chan = chandef.chan;
8952         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8953         if (err)
8954                 goto free_msg;
8955
8956         if (msg) {
8957                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8958                                       NL80211_ATTR_PAD))
8959                         goto nla_put_failure;
8960
8961                 genlmsg_end(msg, hdr);
8962                 return genlmsg_reply(msg, info);
8963         }
8964
8965         return 0;
8966
8967  nla_put_failure:
8968         err = -ENOBUFS;
8969  free_msg:
8970         nlmsg_free(msg);
8971         return err;
8972 }
8973
8974 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8975 {
8976         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8977         struct wireless_dev *wdev = info->user_ptr[1];
8978         u64 cookie;
8979
8980         if (!info->attrs[NL80211_ATTR_COOKIE])
8981                 return -EINVAL;
8982
8983         if (!rdev->ops->mgmt_tx_cancel_wait)
8984                 return -EOPNOTSUPP;
8985
8986         switch (wdev->iftype) {
8987         case NL80211_IFTYPE_STATION:
8988         case NL80211_IFTYPE_ADHOC:
8989         case NL80211_IFTYPE_P2P_CLIENT:
8990         case NL80211_IFTYPE_AP:
8991         case NL80211_IFTYPE_AP_VLAN:
8992         case NL80211_IFTYPE_P2P_GO:
8993         case NL80211_IFTYPE_P2P_DEVICE:
8994                 break;
8995         default:
8996                 return -EOPNOTSUPP;
8997         }
8998
8999         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9000
9001         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9002 }
9003
9004 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9005 {
9006         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9007         struct wireless_dev *wdev;
9008         struct net_device *dev = info->user_ptr[1];
9009         u8 ps_state;
9010         bool state;
9011         int err;
9012
9013         if (!info->attrs[NL80211_ATTR_PS_STATE])
9014                 return -EINVAL;
9015
9016         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9017
9018         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9019                 return -EINVAL;
9020
9021         wdev = dev->ieee80211_ptr;
9022
9023         if (!rdev->ops->set_power_mgmt)
9024                 return -EOPNOTSUPP;
9025
9026         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9027
9028         if (state == wdev->ps)
9029                 return 0;
9030
9031         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9032         if (!err)
9033                 wdev->ps = state;
9034         return err;
9035 }
9036
9037 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9038 {
9039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9040         enum nl80211_ps_state ps_state;
9041         struct wireless_dev *wdev;
9042         struct net_device *dev = info->user_ptr[1];
9043         struct sk_buff *msg;
9044         void *hdr;
9045         int err;
9046
9047         wdev = dev->ieee80211_ptr;
9048
9049         if (!rdev->ops->set_power_mgmt)
9050                 return -EOPNOTSUPP;
9051
9052         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9053         if (!msg)
9054                 return -ENOMEM;
9055
9056         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9057                              NL80211_CMD_GET_POWER_SAVE);
9058         if (!hdr) {
9059                 err = -ENOBUFS;
9060                 goto free_msg;
9061         }
9062
9063         if (wdev->ps)
9064                 ps_state = NL80211_PS_ENABLED;
9065         else
9066                 ps_state = NL80211_PS_DISABLED;
9067
9068         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9069                 goto nla_put_failure;
9070
9071         genlmsg_end(msg, hdr);
9072         return genlmsg_reply(msg, info);
9073
9074  nla_put_failure:
9075         err = -ENOBUFS;
9076  free_msg:
9077         nlmsg_free(msg);
9078         return err;
9079 }
9080
9081 static const struct nla_policy
9082 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9083         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
9084         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9085         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9086         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9087         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9088         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9089 };
9090
9091 static int nl80211_set_cqm_txe(struct genl_info *info,
9092                                u32 rate, u32 pkts, u32 intvl)
9093 {
9094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9095         struct net_device *dev = info->user_ptr[1];
9096         struct wireless_dev *wdev = dev->ieee80211_ptr;
9097
9098         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9099                 return -EINVAL;
9100
9101         if (!rdev->ops->set_cqm_txe_config)
9102                 return -EOPNOTSUPP;
9103
9104         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9105             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9106                 return -EOPNOTSUPP;
9107
9108         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9109 }
9110
9111 static int nl80211_set_cqm_rssi(struct genl_info *info,
9112                                 s32 threshold, u32 hysteresis)
9113 {
9114         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9115         struct net_device *dev = info->user_ptr[1];
9116         struct wireless_dev *wdev = dev->ieee80211_ptr;
9117
9118         if (threshold > 0)
9119                 return -EINVAL;
9120
9121         /* disabling - hysteresis should also be zero then */
9122         if (threshold == 0)
9123                 hysteresis = 0;
9124
9125         if (!rdev->ops->set_cqm_rssi_config)
9126                 return -EOPNOTSUPP;
9127
9128         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9129             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9130                 return -EOPNOTSUPP;
9131
9132         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9133 }
9134
9135 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9136 {
9137         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9138         struct nlattr *cqm;
9139         int err;
9140
9141         cqm = info->attrs[NL80211_ATTR_CQM];
9142         if (!cqm)
9143                 return -EINVAL;
9144
9145         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9146                                nl80211_attr_cqm_policy);
9147         if (err)
9148                 return err;
9149
9150         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9151             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9152                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9153                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9154
9155                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9156         }
9157
9158         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9159             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9160             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9161                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9162                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9163                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9164
9165                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9166         }
9167
9168         return -EINVAL;
9169 }
9170
9171 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9172 {
9173         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9174         struct net_device *dev = info->user_ptr[1];
9175         struct ocb_setup setup = {};
9176         int err;
9177
9178         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9179         if (err)
9180                 return err;
9181
9182         return cfg80211_join_ocb(rdev, dev, &setup);
9183 }
9184
9185 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9186 {
9187         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9188         struct net_device *dev = info->user_ptr[1];
9189
9190         return cfg80211_leave_ocb(rdev, dev);
9191 }
9192
9193 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9194 {
9195         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9196         struct net_device *dev = info->user_ptr[1];
9197         struct mesh_config cfg;
9198         struct mesh_setup setup;
9199         int err;
9200
9201         /* start with default */
9202         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9203         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9204
9205         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9206                 /* and parse parameters if given */
9207                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9208                 if (err)
9209                         return err;
9210         }
9211
9212         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9213             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9214                 return -EINVAL;
9215
9216         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9217         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9218
9219         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9220             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9221                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9222                         return -EINVAL;
9223
9224         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9225                 setup.beacon_interval =
9226                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9227                 if (setup.beacon_interval < 10 ||
9228                     setup.beacon_interval > 10000)
9229                         return -EINVAL;
9230         }
9231
9232         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9233                 setup.dtim_period =
9234                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9235                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9236                         return -EINVAL;
9237         }
9238
9239         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9240                 /* parse additional setup parameters if given */
9241                 err = nl80211_parse_mesh_setup(info, &setup);
9242                 if (err)
9243                         return err;
9244         }
9245
9246         if (setup.user_mpm)
9247                 cfg.auto_open_plinks = false;
9248
9249         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9250                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9251                 if (err)
9252                         return err;
9253         } else {
9254                 /* cfg80211_join_mesh() will sort it out */
9255                 setup.chandef.chan = NULL;
9256         }
9257
9258         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9259                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9260                 int n_rates =
9261                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9262                 struct ieee80211_supported_band *sband;
9263
9264                 if (!setup.chandef.chan)
9265                         return -EINVAL;
9266
9267                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9268
9269                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9270                                              &setup.basic_rates);
9271                 if (err)
9272                         return err;
9273         }
9274
9275         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9276 }
9277
9278 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9279 {
9280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9281         struct net_device *dev = info->user_ptr[1];
9282
9283         return cfg80211_leave_mesh(rdev, dev);
9284 }
9285
9286 #ifdef CONFIG_PM
9287 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9288                                         struct cfg80211_registered_device *rdev)
9289 {
9290         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9291         struct nlattr *nl_pats, *nl_pat;
9292         int i, pat_len;
9293
9294         if (!wowlan->n_patterns)
9295                 return 0;
9296
9297         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9298         if (!nl_pats)
9299                 return -ENOBUFS;
9300
9301         for (i = 0; i < wowlan->n_patterns; i++) {
9302                 nl_pat = nla_nest_start(msg, i + 1);
9303                 if (!nl_pat)
9304                         return -ENOBUFS;
9305                 pat_len = wowlan->patterns[i].pattern_len;
9306                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9307                             wowlan->patterns[i].mask) ||
9308                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9309                             wowlan->patterns[i].pattern) ||
9310                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9311                                 wowlan->patterns[i].pkt_offset))
9312                         return -ENOBUFS;
9313                 nla_nest_end(msg, nl_pat);
9314         }
9315         nla_nest_end(msg, nl_pats);
9316
9317         return 0;
9318 }
9319
9320 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9321                                    struct cfg80211_wowlan_tcp *tcp)
9322 {
9323         struct nlattr *nl_tcp;
9324
9325         if (!tcp)
9326                 return 0;
9327
9328         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9329         if (!nl_tcp)
9330                 return -ENOBUFS;
9331
9332         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9333             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9334             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9335             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9336             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9337             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9338                     tcp->payload_len, tcp->payload) ||
9339             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9340                         tcp->data_interval) ||
9341             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9342                     tcp->wake_len, tcp->wake_data) ||
9343             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9344                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9345                 return -ENOBUFS;
9346
9347         if (tcp->payload_seq.len &&
9348             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9349                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9350                 return -ENOBUFS;
9351
9352         if (tcp->payload_tok.len &&
9353             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9354                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9355                     &tcp->payload_tok))
9356                 return -ENOBUFS;
9357
9358         nla_nest_end(msg, nl_tcp);
9359
9360         return 0;
9361 }
9362
9363 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9364                                   struct cfg80211_sched_scan_request *req)
9365 {
9366         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9367         int i;
9368
9369         if (!req)
9370                 return 0;
9371
9372         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9373         if (!nd)
9374                 return -ENOBUFS;
9375
9376         if (req->n_scan_plans == 1 &&
9377             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9378                         req->scan_plans[0].interval * 1000))
9379                 return -ENOBUFS;
9380
9381         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9382                 return -ENOBUFS;
9383
9384         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9385         if (!freqs)
9386                 return -ENOBUFS;
9387
9388         for (i = 0; i < req->n_channels; i++)
9389                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9390
9391         nla_nest_end(msg, freqs);
9392
9393         if (req->n_match_sets) {
9394                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9395                 for (i = 0; i < req->n_match_sets; i++) {
9396                         match = nla_nest_start(msg, i);
9397                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9398                                 req->match_sets[i].ssid.ssid_len,
9399                                 req->match_sets[i].ssid.ssid);
9400                         nla_nest_end(msg, match);
9401                 }
9402                 nla_nest_end(msg, matches);
9403         }
9404
9405         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9406         if (!scan_plans)
9407                 return -ENOBUFS;
9408
9409         for (i = 0; i < req->n_scan_plans; i++) {
9410                 scan_plan = nla_nest_start(msg, i + 1);
9411                 if (!scan_plan ||
9412                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9413                                 req->scan_plans[i].interval) ||
9414                     (req->scan_plans[i].iterations &&
9415                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9416                                  req->scan_plans[i].iterations)))
9417                         return -ENOBUFS;
9418                 nla_nest_end(msg, scan_plan);
9419         }
9420         nla_nest_end(msg, scan_plans);
9421
9422         nla_nest_end(msg, nd);
9423
9424         return 0;
9425 }
9426
9427 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9428 {
9429         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9430         struct sk_buff *msg;
9431         void *hdr;
9432         u32 size = NLMSG_DEFAULT_SIZE;
9433
9434         if (!rdev->wiphy.wowlan)
9435                 return -EOPNOTSUPP;
9436
9437         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9438                 /* adjust size to have room for all the data */
9439                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9440                         rdev->wiphy.wowlan_config->tcp->payload_len +
9441                         rdev->wiphy.wowlan_config->tcp->wake_len +
9442                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9443         }
9444
9445         msg = nlmsg_new(size, GFP_KERNEL);
9446         if (!msg)
9447                 return -ENOMEM;
9448
9449         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9450                              NL80211_CMD_GET_WOWLAN);
9451         if (!hdr)
9452                 goto nla_put_failure;
9453
9454         if (rdev->wiphy.wowlan_config) {
9455                 struct nlattr *nl_wowlan;
9456
9457                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9458                 if (!nl_wowlan)
9459                         goto nla_put_failure;
9460
9461                 if ((rdev->wiphy.wowlan_config->any &&
9462                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9463                     (rdev->wiphy.wowlan_config->disconnect &&
9464                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9465                     (rdev->wiphy.wowlan_config->magic_pkt &&
9466                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9467                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9468                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9469                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9470                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9471                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9472                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9473                     (rdev->wiphy.wowlan_config->rfkill_release &&
9474                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9475                         goto nla_put_failure;
9476
9477                 if (nl80211_send_wowlan_patterns(msg, rdev))
9478                         goto nla_put_failure;
9479
9480                 if (nl80211_send_wowlan_tcp(msg,
9481                                             rdev->wiphy.wowlan_config->tcp))
9482                         goto nla_put_failure;
9483
9484                 if (nl80211_send_wowlan_nd(
9485                             msg,
9486                             rdev->wiphy.wowlan_config->nd_config))
9487                         goto nla_put_failure;
9488
9489                 nla_nest_end(msg, nl_wowlan);
9490         }
9491
9492         genlmsg_end(msg, hdr);
9493         return genlmsg_reply(msg, info);
9494
9495 nla_put_failure:
9496         nlmsg_free(msg);
9497         return -ENOBUFS;
9498 }
9499
9500 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9501                                     struct nlattr *attr,
9502                                     struct cfg80211_wowlan *trig)
9503 {
9504         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9505         struct cfg80211_wowlan_tcp *cfg;
9506         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9507         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9508         u32 size;
9509         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9510         int err, port;
9511
9512         if (!rdev->wiphy.wowlan->tcp)
9513                 return -EINVAL;
9514
9515         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9516                         nla_data(attr), nla_len(attr),
9517                         nl80211_wowlan_tcp_policy);
9518         if (err)
9519                 return err;
9520
9521         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9522             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9523             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9524             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9525             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9526             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9527             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9528             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9529                 return -EINVAL;
9530
9531         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9532         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9533                 return -EINVAL;
9534
9535         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9536                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9537             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9538                 return -EINVAL;
9539
9540         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9541         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9542                 return -EINVAL;
9543
9544         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9545         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9546                 return -EINVAL;
9547
9548         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9549                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9550
9551                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9552                 tokens_size = tokln - sizeof(*tok);
9553
9554                 if (!tok->len || tokens_size % tok->len)
9555                         return -EINVAL;
9556                 if (!rdev->wiphy.wowlan->tcp->tok)
9557                         return -EINVAL;
9558                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9559                         return -EINVAL;
9560                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9561                         return -EINVAL;
9562                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9563                         return -EINVAL;
9564                 if (tok->offset + tok->len > data_size)
9565                         return -EINVAL;
9566         }
9567
9568         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9569                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9570                 if (!rdev->wiphy.wowlan->tcp->seq)
9571                         return -EINVAL;
9572                 if (seq->len == 0 || seq->len > 4)
9573                         return -EINVAL;
9574                 if (seq->len + seq->offset > data_size)
9575                         return -EINVAL;
9576         }
9577
9578         size = sizeof(*cfg);
9579         size += data_size;
9580         size += wake_size + wake_mask_size;
9581         size += tokens_size;
9582
9583         cfg = kzalloc(size, GFP_KERNEL);
9584         if (!cfg)
9585                 return -ENOMEM;
9586         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9587         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9588         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9589                ETH_ALEN);
9590         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9591                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9592         else
9593                 port = 0;
9594 #ifdef CONFIG_INET
9595         /* allocate a socket and port for it and use it */
9596         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9597                             IPPROTO_TCP, &cfg->sock, 1);
9598         if (err) {
9599                 kfree(cfg);
9600                 return err;
9601         }
9602         if (inet_csk_get_port(cfg->sock->sk, port)) {
9603                 sock_release(cfg->sock);
9604                 kfree(cfg);
9605                 return -EADDRINUSE;
9606         }
9607         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9608 #else
9609         if (!port) {
9610                 kfree(cfg);
9611                 return -EINVAL;
9612         }
9613         cfg->src_port = port;
9614 #endif
9615
9616         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9617         cfg->payload_len = data_size;
9618         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9619         memcpy((void *)cfg->payload,
9620                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9621                data_size);
9622         if (seq)
9623                 cfg->payload_seq = *seq;
9624         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9625         cfg->wake_len = wake_size;
9626         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9627         memcpy((void *)cfg->wake_data,
9628                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9629                wake_size);
9630         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9631                          data_size + wake_size;
9632         memcpy((void *)cfg->wake_mask,
9633                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9634                wake_mask_size);
9635         if (tok) {
9636                 cfg->tokens_size = tokens_size;
9637                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9638         }
9639
9640         trig->tcp = cfg;
9641
9642         return 0;
9643 }
9644
9645 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9646                                    const struct wiphy_wowlan_support *wowlan,
9647                                    struct nlattr *attr,
9648                                    struct cfg80211_wowlan *trig)
9649 {
9650         struct nlattr **tb;
9651         int err;
9652
9653         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9654         if (!tb)
9655                 return -ENOMEM;
9656
9657         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9658                 err = -EOPNOTSUPP;
9659                 goto out;
9660         }
9661
9662         err = nla_parse(tb, NL80211_ATTR_MAX,
9663                         nla_data(attr), nla_len(attr),
9664                         nl80211_policy);
9665         if (err)
9666                 goto out;
9667
9668         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9669         err = PTR_ERR_OR_ZERO(trig->nd_config);
9670         if (err)
9671                 trig->nd_config = NULL;
9672
9673 out:
9674         kfree(tb);
9675         return err;
9676 }
9677
9678 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9679 {
9680         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9681         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9682         struct cfg80211_wowlan new_triggers = {};
9683         struct cfg80211_wowlan *ntrig;
9684         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9685         int err, i;
9686         bool prev_enabled = rdev->wiphy.wowlan_config;
9687         bool regular = false;
9688
9689         if (!wowlan)
9690                 return -EOPNOTSUPP;
9691
9692         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9693                 cfg80211_rdev_free_wowlan(rdev);
9694                 rdev->wiphy.wowlan_config = NULL;
9695                 goto set_wakeup;
9696         }
9697
9698         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9699                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9700                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9701                         nl80211_wowlan_policy);
9702         if (err)
9703                 return err;
9704
9705         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9706                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9707                         return -EINVAL;
9708                 new_triggers.any = true;
9709         }
9710
9711         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9712                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9713                         return -EINVAL;
9714                 new_triggers.disconnect = true;
9715                 regular = true;
9716         }
9717
9718         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9719                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9720                         return -EINVAL;
9721                 new_triggers.magic_pkt = true;
9722                 regular = true;
9723         }
9724
9725         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9726                 return -EINVAL;
9727
9728         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9729                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9730                         return -EINVAL;
9731                 new_triggers.gtk_rekey_failure = true;
9732                 regular = true;
9733         }
9734
9735         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9736                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9737                         return -EINVAL;
9738                 new_triggers.eap_identity_req = true;
9739                 regular = true;
9740         }
9741
9742         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9743                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9744                         return -EINVAL;
9745                 new_triggers.four_way_handshake = true;
9746                 regular = true;
9747         }
9748
9749         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9750                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9751                         return -EINVAL;
9752                 new_triggers.rfkill_release = true;
9753                 regular = true;
9754         }
9755
9756         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9757                 struct nlattr *pat;
9758                 int n_patterns = 0;
9759                 int rem, pat_len, mask_len, pkt_offset;
9760                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9761
9762                 regular = true;
9763
9764                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9765                                     rem)
9766                         n_patterns++;
9767                 if (n_patterns > wowlan->n_patterns)
9768                         return -EINVAL;
9769
9770                 new_triggers.patterns = kcalloc(n_patterns,
9771                                                 sizeof(new_triggers.patterns[0]),
9772                                                 GFP_KERNEL);
9773                 if (!new_triggers.patterns)
9774                         return -ENOMEM;
9775
9776                 new_triggers.n_patterns = n_patterns;
9777                 i = 0;
9778
9779                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9780                                     rem) {
9781                         u8 *mask_pat;
9782
9783                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9784                                   nla_len(pat), NULL);
9785                         err = -EINVAL;
9786                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9787                             !pat_tb[NL80211_PKTPAT_PATTERN])
9788                                 goto error;
9789                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9790                         mask_len = DIV_ROUND_UP(pat_len, 8);
9791                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9792                                 goto error;
9793                         if (pat_len > wowlan->pattern_max_len ||
9794                             pat_len < wowlan->pattern_min_len)
9795                                 goto error;
9796
9797                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9798                                 pkt_offset = 0;
9799                         else
9800                                 pkt_offset = nla_get_u32(
9801                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9802                         if (pkt_offset > wowlan->max_pkt_offset)
9803                                 goto error;
9804                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9805
9806                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9807                         if (!mask_pat) {
9808                                 err = -ENOMEM;
9809                                 goto error;
9810                         }
9811                         new_triggers.patterns[i].mask = mask_pat;
9812                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9813                                mask_len);
9814                         mask_pat += mask_len;
9815                         new_triggers.patterns[i].pattern = mask_pat;
9816                         new_triggers.patterns[i].pattern_len = pat_len;
9817                         memcpy(mask_pat,
9818                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9819                                pat_len);
9820                         i++;
9821                 }
9822         }
9823
9824         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9825                 regular = true;
9826                 err = nl80211_parse_wowlan_tcp(
9827                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9828                         &new_triggers);
9829                 if (err)
9830                         goto error;
9831         }
9832
9833         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9834                 regular = true;
9835                 err = nl80211_parse_wowlan_nd(
9836                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9837                         &new_triggers);
9838                 if (err)
9839                         goto error;
9840         }
9841
9842         /* The 'any' trigger means the device continues operating more or less
9843          * as in its normal operation mode and wakes up the host on most of the
9844          * normal interrupts (like packet RX, ...)
9845          * It therefore makes little sense to combine with the more constrained
9846          * wakeup trigger modes.
9847          */
9848         if (new_triggers.any && regular) {
9849                 err = -EINVAL;
9850                 goto error;
9851         }
9852
9853         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9854         if (!ntrig) {
9855                 err = -ENOMEM;
9856                 goto error;
9857         }
9858         cfg80211_rdev_free_wowlan(rdev);
9859         rdev->wiphy.wowlan_config = ntrig;
9860
9861  set_wakeup:
9862         if (rdev->ops->set_wakeup &&
9863             prev_enabled != !!rdev->wiphy.wowlan_config)
9864                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9865
9866         return 0;
9867  error:
9868         for (i = 0; i < new_triggers.n_patterns; i++)
9869                 kfree(new_triggers.patterns[i].mask);
9870         kfree(new_triggers.patterns);
9871         if (new_triggers.tcp && new_triggers.tcp->sock)
9872                 sock_release(new_triggers.tcp->sock);
9873         kfree(new_triggers.tcp);
9874         kfree(new_triggers.nd_config);
9875         return err;
9876 }
9877 #endif
9878
9879 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9880                                        struct cfg80211_registered_device *rdev)
9881 {
9882         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9883         int i, j, pat_len;
9884         struct cfg80211_coalesce_rules *rule;
9885
9886         if (!rdev->coalesce->n_rules)
9887                 return 0;
9888
9889         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9890         if (!nl_rules)
9891                 return -ENOBUFS;
9892
9893         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9894                 nl_rule = nla_nest_start(msg, i + 1);
9895                 if (!nl_rule)
9896                         return -ENOBUFS;
9897
9898                 rule = &rdev->coalesce->rules[i];
9899                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9900                                 rule->delay))
9901                         return -ENOBUFS;
9902
9903                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9904                                 rule->condition))
9905                         return -ENOBUFS;
9906
9907                 nl_pats = nla_nest_start(msg,
9908                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9909                 if (!nl_pats)
9910                         return -ENOBUFS;
9911
9912                 for (j = 0; j < rule->n_patterns; j++) {
9913                         nl_pat = nla_nest_start(msg, j + 1);
9914                         if (!nl_pat)
9915                                 return -ENOBUFS;
9916                         pat_len = rule->patterns[j].pattern_len;
9917                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9918                                     DIV_ROUND_UP(pat_len, 8),
9919                                     rule->patterns[j].mask) ||
9920                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9921                                     rule->patterns[j].pattern) ||
9922                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9923                                         rule->patterns[j].pkt_offset))
9924                                 return -ENOBUFS;
9925                         nla_nest_end(msg, nl_pat);
9926                 }
9927                 nla_nest_end(msg, nl_pats);
9928                 nla_nest_end(msg, nl_rule);
9929         }
9930         nla_nest_end(msg, nl_rules);
9931
9932         return 0;
9933 }
9934
9935 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9936 {
9937         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9938         struct sk_buff *msg;
9939         void *hdr;
9940
9941         if (!rdev->wiphy.coalesce)
9942                 return -EOPNOTSUPP;
9943
9944         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9945         if (!msg)
9946                 return -ENOMEM;
9947
9948         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9949                              NL80211_CMD_GET_COALESCE);
9950         if (!hdr)
9951                 goto nla_put_failure;
9952
9953         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9954                 goto nla_put_failure;
9955
9956         genlmsg_end(msg, hdr);
9957         return genlmsg_reply(msg, info);
9958
9959 nla_put_failure:
9960         nlmsg_free(msg);
9961         return -ENOBUFS;
9962 }
9963
9964 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9965 {
9966         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9967         int i, j;
9968         struct cfg80211_coalesce_rules *rule;
9969
9970         if (!coalesce)
9971                 return;
9972
9973         for (i = 0; i < coalesce->n_rules; i++) {
9974                 rule = &coalesce->rules[i];
9975                 for (j = 0; j < rule->n_patterns; j++)
9976                         kfree(rule->patterns[j].mask);
9977                 kfree(rule->patterns);
9978         }
9979         kfree(coalesce->rules);
9980         kfree(coalesce);
9981         rdev->coalesce = NULL;
9982 }
9983
9984 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9985                                        struct nlattr *rule,
9986                                        struct cfg80211_coalesce_rules *new_rule)
9987 {
9988         int err, i;
9989         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9990         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9991         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9992         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9993
9994         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9995                         nla_len(rule), nl80211_coalesce_policy);
9996         if (err)
9997                 return err;
9998
9999         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10000                 new_rule->delay =
10001                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10002         if (new_rule->delay > coalesce->max_delay)
10003                 return -EINVAL;
10004
10005         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10006                 new_rule->condition =
10007                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10008         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10009             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10010                 return -EINVAL;
10011
10012         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10013                 return -EINVAL;
10014
10015         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10016                             rem)
10017                 n_patterns++;
10018         if (n_patterns > coalesce->n_patterns)
10019                 return -EINVAL;
10020
10021         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10022                                      GFP_KERNEL);
10023         if (!new_rule->patterns)
10024                 return -ENOMEM;
10025
10026         new_rule->n_patterns = n_patterns;
10027         i = 0;
10028
10029         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10030                             rem) {
10031                 u8 *mask_pat;
10032
10033                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
10034                           nla_len(pat), NULL);
10035                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10036                     !pat_tb[NL80211_PKTPAT_PATTERN])
10037                         return -EINVAL;
10038                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10039                 mask_len = DIV_ROUND_UP(pat_len, 8);
10040                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10041                         return -EINVAL;
10042                 if (pat_len > coalesce->pattern_max_len ||
10043                     pat_len < coalesce->pattern_min_len)
10044                         return -EINVAL;
10045
10046                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10047                         pkt_offset = 0;
10048                 else
10049                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10050                 if (pkt_offset > coalesce->max_pkt_offset)
10051                         return -EINVAL;
10052                 new_rule->patterns[i].pkt_offset = pkt_offset;
10053
10054                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10055                 if (!mask_pat)
10056                         return -ENOMEM;
10057
10058                 new_rule->patterns[i].mask = mask_pat;
10059                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10060                        mask_len);
10061
10062                 mask_pat += mask_len;
10063                 new_rule->patterns[i].pattern = mask_pat;
10064                 new_rule->patterns[i].pattern_len = pat_len;
10065                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10066                        pat_len);
10067                 i++;
10068         }
10069
10070         return 0;
10071 }
10072
10073 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10074 {
10075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10076         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10077         struct cfg80211_coalesce new_coalesce = {};
10078         struct cfg80211_coalesce *n_coalesce;
10079         int err, rem_rule, n_rules = 0, i, j;
10080         struct nlattr *rule;
10081         struct cfg80211_coalesce_rules *tmp_rule;
10082
10083         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10084                 return -EOPNOTSUPP;
10085
10086         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10087                 cfg80211_rdev_free_coalesce(rdev);
10088                 rdev_set_coalesce(rdev, NULL);
10089                 return 0;
10090         }
10091
10092         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10093                             rem_rule)
10094                 n_rules++;
10095         if (n_rules > coalesce->n_rules)
10096                 return -EINVAL;
10097
10098         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10099                                      GFP_KERNEL);
10100         if (!new_coalesce.rules)
10101                 return -ENOMEM;
10102
10103         new_coalesce.n_rules = n_rules;
10104         i = 0;
10105
10106         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10107                             rem_rule) {
10108                 err = nl80211_parse_coalesce_rule(rdev, rule,
10109                                                   &new_coalesce.rules[i]);
10110                 if (err)
10111                         goto error;
10112
10113                 i++;
10114         }
10115
10116         err = rdev_set_coalesce(rdev, &new_coalesce);
10117         if (err)
10118                 goto error;
10119
10120         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10121         if (!n_coalesce) {
10122                 err = -ENOMEM;
10123                 goto error;
10124         }
10125         cfg80211_rdev_free_coalesce(rdev);
10126         rdev->coalesce = n_coalesce;
10127
10128         return 0;
10129 error:
10130         for (i = 0; i < new_coalesce.n_rules; i++) {
10131                 tmp_rule = &new_coalesce.rules[i];
10132                 for (j = 0; j < tmp_rule->n_patterns; j++)
10133                         kfree(tmp_rule->patterns[j].mask);
10134                 kfree(tmp_rule->patterns);
10135         }
10136         kfree(new_coalesce.rules);
10137
10138         return err;
10139 }
10140
10141 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10142 {
10143         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10144         struct net_device *dev = info->user_ptr[1];
10145         struct wireless_dev *wdev = dev->ieee80211_ptr;
10146         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10147         struct cfg80211_gtk_rekey_data rekey_data;
10148         int err;
10149
10150         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10151                 return -EINVAL;
10152
10153         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10154                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10155                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10156                         nl80211_rekey_policy);
10157         if (err)
10158                 return err;
10159
10160         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10161                 return -ERANGE;
10162         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10163                 return -ERANGE;
10164         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10165                 return -ERANGE;
10166
10167         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10168         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10169         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10170
10171         wdev_lock(wdev);
10172         if (!wdev->current_bss) {
10173                 err = -ENOTCONN;
10174                 goto out;
10175         }
10176
10177         if (!rdev->ops->set_rekey_data) {
10178                 err = -EOPNOTSUPP;
10179                 goto out;
10180         }
10181
10182         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10183  out:
10184         wdev_unlock(wdev);
10185         return err;
10186 }
10187
10188 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10189                                              struct genl_info *info)
10190 {
10191         struct net_device *dev = info->user_ptr[1];
10192         struct wireless_dev *wdev = dev->ieee80211_ptr;
10193
10194         if (wdev->iftype != NL80211_IFTYPE_AP &&
10195             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10196                 return -EINVAL;
10197
10198         if (wdev->ap_unexpected_nlportid)
10199                 return -EBUSY;
10200
10201         wdev->ap_unexpected_nlportid = info->snd_portid;
10202         return 0;
10203 }
10204
10205 static int nl80211_probe_client(struct sk_buff *skb,
10206                                 struct genl_info *info)
10207 {
10208         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10209         struct net_device *dev = info->user_ptr[1];
10210         struct wireless_dev *wdev = dev->ieee80211_ptr;
10211         struct sk_buff *msg;
10212         void *hdr;
10213         const u8 *addr;
10214         u64 cookie;
10215         int err;
10216
10217         if (wdev->iftype != NL80211_IFTYPE_AP &&
10218             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10219                 return -EOPNOTSUPP;
10220
10221         if (!info->attrs[NL80211_ATTR_MAC])
10222                 return -EINVAL;
10223
10224         if (!rdev->ops->probe_client)
10225                 return -EOPNOTSUPP;
10226
10227         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10228         if (!msg)
10229                 return -ENOMEM;
10230
10231         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10232                              NL80211_CMD_PROBE_CLIENT);
10233         if (!hdr) {
10234                 err = -ENOBUFS;
10235                 goto free_msg;
10236         }
10237
10238         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10239
10240         err = rdev_probe_client(rdev, dev, addr, &cookie);
10241         if (err)
10242                 goto free_msg;
10243
10244         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10245                               NL80211_ATTR_PAD))
10246                 goto nla_put_failure;
10247
10248         genlmsg_end(msg, hdr);
10249
10250         return genlmsg_reply(msg, info);
10251
10252  nla_put_failure:
10253         err = -ENOBUFS;
10254  free_msg:
10255         nlmsg_free(msg);
10256         return err;
10257 }
10258
10259 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10260 {
10261         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10262         struct cfg80211_beacon_registration *reg, *nreg;
10263         int rv;
10264
10265         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10266                 return -EOPNOTSUPP;
10267
10268         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10269         if (!nreg)
10270                 return -ENOMEM;
10271
10272         /* First, check if already registered. */
10273         spin_lock_bh(&rdev->beacon_registrations_lock);
10274         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10275                 if (reg->nlportid == info->snd_portid) {
10276                         rv = -EALREADY;
10277                         goto out_err;
10278                 }
10279         }
10280         /* Add it to the list */
10281         nreg->nlportid = info->snd_portid;
10282         list_add(&nreg->list, &rdev->beacon_registrations);
10283
10284         spin_unlock_bh(&rdev->beacon_registrations_lock);
10285
10286         return 0;
10287 out_err:
10288         spin_unlock_bh(&rdev->beacon_registrations_lock);
10289         kfree(nreg);
10290         return rv;
10291 }
10292
10293 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10294 {
10295         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10296         struct wireless_dev *wdev = info->user_ptr[1];
10297         int err;
10298
10299         if (!rdev->ops->start_p2p_device)
10300                 return -EOPNOTSUPP;
10301
10302         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10303                 return -EOPNOTSUPP;
10304
10305         if (wdev->p2p_started)
10306                 return 0;
10307
10308         if (rfkill_blocked(rdev->rfkill))
10309                 return -ERFKILL;
10310
10311         err = rdev_start_p2p_device(rdev, wdev);
10312         if (err)
10313                 return err;
10314
10315         wdev->p2p_started = true;
10316         rdev->opencount++;
10317
10318         return 0;
10319 }
10320
10321 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10322 {
10323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10324         struct wireless_dev *wdev = info->user_ptr[1];
10325
10326         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10327                 return -EOPNOTSUPP;
10328
10329         if (!rdev->ops->stop_p2p_device)
10330                 return -EOPNOTSUPP;
10331
10332         cfg80211_stop_p2p_device(rdev, wdev);
10333
10334         return 0;
10335 }
10336
10337 static int nl80211_get_protocol_features(struct sk_buff *skb,
10338                                          struct genl_info *info)
10339 {
10340         void *hdr;
10341         struct sk_buff *msg;
10342
10343         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10344         if (!msg)
10345                 return -ENOMEM;
10346
10347         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10348                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10349         if (!hdr)
10350                 goto nla_put_failure;
10351
10352         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10353                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10354                 goto nla_put_failure;
10355
10356         genlmsg_end(msg, hdr);
10357         return genlmsg_reply(msg, info);
10358
10359  nla_put_failure:
10360         kfree_skb(msg);
10361         return -ENOBUFS;
10362 }
10363
10364 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10365 {
10366         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10367         struct cfg80211_update_ft_ies_params ft_params;
10368         struct net_device *dev = info->user_ptr[1];
10369
10370         if (!rdev->ops->update_ft_ies)
10371                 return -EOPNOTSUPP;
10372
10373         if (!info->attrs[NL80211_ATTR_MDID] ||
10374             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10375                 return -EINVAL;
10376
10377         memset(&ft_params, 0, sizeof(ft_params));
10378         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10379         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10380         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10381
10382         return rdev_update_ft_ies(rdev, dev, &ft_params);
10383 }
10384
10385 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10386                                        struct genl_info *info)
10387 {
10388         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10389         struct wireless_dev *wdev = info->user_ptr[1];
10390         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10391         u16 duration;
10392         int ret;
10393
10394         if (!rdev->ops->crit_proto_start)
10395                 return -EOPNOTSUPP;
10396
10397         if (WARN_ON(!rdev->ops->crit_proto_stop))
10398                 return -EINVAL;
10399
10400         if (rdev->crit_proto_nlportid)
10401                 return -EBUSY;
10402
10403         /* determine protocol if provided */
10404         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10405                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10406
10407         if (proto >= NUM_NL80211_CRIT_PROTO)
10408                 return -EINVAL;
10409
10410         /* timeout must be provided */
10411         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10412                 return -EINVAL;
10413
10414         duration =
10415                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10416
10417         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10418                 return -ERANGE;
10419
10420         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10421         if (!ret)
10422                 rdev->crit_proto_nlportid = info->snd_portid;
10423
10424         return ret;
10425 }
10426
10427 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10428                                       struct genl_info *info)
10429 {
10430         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10431         struct wireless_dev *wdev = info->user_ptr[1];
10432
10433         if (!rdev->ops->crit_proto_stop)
10434                 return -EOPNOTSUPP;
10435
10436         if (rdev->crit_proto_nlportid) {
10437                 rdev->crit_proto_nlportid = 0;
10438                 rdev_crit_proto_stop(rdev, wdev);
10439         }
10440         return 0;
10441 }
10442
10443 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10444 {
10445         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10446         struct wireless_dev *wdev =
10447                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10448         int i, err;
10449         u32 vid, subcmd;
10450
10451         if (!rdev->wiphy.vendor_commands)
10452                 return -EOPNOTSUPP;
10453
10454         if (IS_ERR(wdev)) {
10455                 err = PTR_ERR(wdev);
10456                 if (err != -EINVAL)
10457                         return err;
10458                 wdev = NULL;
10459         } else if (wdev->wiphy != &rdev->wiphy) {
10460                 return -EINVAL;
10461         }
10462
10463         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10464             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10465                 return -EINVAL;
10466
10467         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10468         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10469         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10470                 const struct wiphy_vendor_command *vcmd;
10471                 void *data = NULL;
10472                 int len = 0;
10473
10474                 vcmd = &rdev->wiphy.vendor_commands[i];
10475
10476                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10477                         continue;
10478
10479                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10480                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10481                         if (!wdev)
10482                                 return -EINVAL;
10483                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10484                             !wdev->netdev)
10485                                 return -EINVAL;
10486
10487                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10488                                 if (wdev->netdev &&
10489                                     !netif_running(wdev->netdev))
10490                                         return -ENETDOWN;
10491                                 if (!wdev->netdev && !wdev->p2p_started)
10492                                         return -ENETDOWN;
10493                         }
10494
10495                         if (!vcmd->doit)
10496                                 return -EOPNOTSUPP;
10497                 } else {
10498                         wdev = NULL;
10499                 }
10500
10501                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10502                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10503                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10504                 }
10505
10506                 rdev->cur_cmd_info = info;
10507                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10508                                                           data, len);
10509                 rdev->cur_cmd_info = NULL;
10510                 return err;
10511         }
10512
10513         return -EOPNOTSUPP;
10514 }
10515
10516 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10517                                        struct netlink_callback *cb,
10518                                        struct cfg80211_registered_device **rdev,
10519                                        struct wireless_dev **wdev)
10520 {
10521         u32 vid, subcmd;
10522         unsigned int i;
10523         int vcmd_idx = -1;
10524         int err;
10525         void *data = NULL;
10526         unsigned int data_len = 0;
10527
10528         rtnl_lock();
10529
10530         if (cb->args[0]) {
10531                 /* subtract the 1 again here */
10532                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10533                 struct wireless_dev *tmp;
10534
10535                 if (!wiphy) {
10536                         err = -ENODEV;
10537                         goto out_unlock;
10538                 }
10539                 *rdev = wiphy_to_rdev(wiphy);
10540                 *wdev = NULL;
10541
10542                 if (cb->args[1]) {
10543                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
10544                                 if (tmp->identifier == cb->args[1] - 1) {
10545                                         *wdev = tmp;
10546                                         break;
10547                                 }
10548                         }
10549                 }
10550
10551                 /* keep rtnl locked in successful case */
10552                 return 0;
10553         }
10554
10555         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10556                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10557                           nl80211_policy);
10558         if (err)
10559                 goto out_unlock;
10560
10561         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10562             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10563                 err = -EINVAL;
10564                 goto out_unlock;
10565         }
10566
10567         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10568                                            nl80211_fam.attrbuf);
10569         if (IS_ERR(*wdev))
10570                 *wdev = NULL;
10571
10572         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10573                                            nl80211_fam.attrbuf);
10574         if (IS_ERR(*rdev)) {
10575                 err = PTR_ERR(*rdev);
10576                 goto out_unlock;
10577         }
10578
10579         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10580         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10581
10582         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10583                 const struct wiphy_vendor_command *vcmd;
10584
10585                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10586
10587                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10588                         continue;
10589
10590                 if (!vcmd->dumpit) {
10591                         err = -EOPNOTSUPP;
10592                         goto out_unlock;
10593                 }
10594
10595                 vcmd_idx = i;
10596                 break;
10597         }
10598
10599         if (vcmd_idx < 0) {
10600                 err = -EOPNOTSUPP;
10601                 goto out_unlock;
10602         }
10603
10604         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10605                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10606                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10607         }
10608
10609         /* 0 is the first index - add 1 to parse only once */
10610         cb->args[0] = (*rdev)->wiphy_idx + 1;
10611         /* add 1 to know if it was NULL */
10612         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10613         cb->args[2] = vcmd_idx;
10614         cb->args[3] = (unsigned long)data;
10615         cb->args[4] = data_len;
10616
10617         /* keep rtnl locked in successful case */
10618         return 0;
10619  out_unlock:
10620         rtnl_unlock();
10621         return err;
10622 }
10623
10624 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10625                                    struct netlink_callback *cb)
10626 {
10627         struct cfg80211_registered_device *rdev;
10628         struct wireless_dev *wdev;
10629         unsigned int vcmd_idx;
10630         const struct wiphy_vendor_command *vcmd;
10631         void *data;
10632         int data_len;
10633         int err;
10634         struct nlattr *vendor_data;
10635
10636         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10637         if (err)
10638                 return err;
10639
10640         vcmd_idx = cb->args[2];
10641         data = (void *)cb->args[3];
10642         data_len = cb->args[4];
10643         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10644
10645         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10646                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10647                 if (!wdev)
10648                         return -EINVAL;
10649                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10650                     !wdev->netdev)
10651                         return -EINVAL;
10652
10653                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10654                         if (wdev->netdev &&
10655                             !netif_running(wdev->netdev))
10656                                 return -ENETDOWN;
10657                         if (!wdev->netdev && !wdev->p2p_started)
10658                                 return -ENETDOWN;
10659                 }
10660         }
10661
10662         while (1) {
10663                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10664                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10665                                            NL80211_CMD_VENDOR);
10666                 if (!hdr)
10667                         break;
10668
10669                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10670                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10671                                                wdev_id(wdev),
10672                                                NL80211_ATTR_PAD))) {
10673                         genlmsg_cancel(skb, hdr);
10674                         break;
10675                 }
10676
10677                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10678                 if (!vendor_data) {
10679                         genlmsg_cancel(skb, hdr);
10680                         break;
10681                 }
10682
10683                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10684                                    (unsigned long *)&cb->args[5]);
10685                 nla_nest_end(skb, vendor_data);
10686
10687                 if (err == -ENOBUFS || err == -ENOENT) {
10688                         genlmsg_cancel(skb, hdr);
10689                         break;
10690                 } else if (err) {
10691                         genlmsg_cancel(skb, hdr);
10692                         goto out;
10693                 }
10694
10695                 genlmsg_end(skb, hdr);
10696         }
10697
10698         err = skb->len;
10699  out:
10700         rtnl_unlock();
10701         return err;
10702 }
10703
10704 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10705                                            enum nl80211_commands cmd,
10706                                            enum nl80211_attrs attr,
10707                                            int approxlen)
10708 {
10709         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10710
10711         if (WARN_ON(!rdev->cur_cmd_info))
10712                 return NULL;
10713
10714         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10715                                            rdev->cur_cmd_info->snd_portid,
10716                                            rdev->cur_cmd_info->snd_seq,
10717                                            cmd, attr, NULL, GFP_KERNEL);
10718 }
10719 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10720
10721 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10722 {
10723         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10724         void *hdr = ((void **)skb->cb)[1];
10725         struct nlattr *data = ((void **)skb->cb)[2];
10726
10727         /* clear CB data for netlink core to own from now on */
10728         memset(skb->cb, 0, sizeof(skb->cb));
10729
10730         if (WARN_ON(!rdev->cur_cmd_info)) {
10731                 kfree_skb(skb);
10732                 return -EINVAL;
10733         }
10734
10735         nla_nest_end(skb, data);
10736         genlmsg_end(skb, hdr);
10737         return genlmsg_reply(skb, rdev->cur_cmd_info);
10738 }
10739 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10740
10741 static int nl80211_set_qos_map(struct sk_buff *skb,
10742                                struct genl_info *info)
10743 {
10744         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10745         struct cfg80211_qos_map *qos_map = NULL;
10746         struct net_device *dev = info->user_ptr[1];
10747         u8 *pos, len, num_des, des_len, des;
10748         int ret;
10749
10750         if (!rdev->ops->set_qos_map)
10751                 return -EOPNOTSUPP;
10752
10753         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10754                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10755                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10756
10757                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10758                     len > IEEE80211_QOS_MAP_LEN_MAX)
10759                         return -EINVAL;
10760
10761                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10762                 if (!qos_map)
10763                         return -ENOMEM;
10764
10765                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10766                 if (num_des) {
10767                         des_len = num_des *
10768                                 sizeof(struct cfg80211_dscp_exception);
10769                         memcpy(qos_map->dscp_exception, pos, des_len);
10770                         qos_map->num_des = num_des;
10771                         for (des = 0; des < num_des; des++) {
10772                                 if (qos_map->dscp_exception[des].up > 7) {
10773                                         kfree(qos_map);
10774                                         return -EINVAL;
10775                                 }
10776                         }
10777                         pos += des_len;
10778                 }
10779                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10780         }
10781
10782         wdev_lock(dev->ieee80211_ptr);
10783         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10784         if (!ret)
10785                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10786         wdev_unlock(dev->ieee80211_ptr);
10787
10788         kfree(qos_map);
10789         return ret;
10790 }
10791
10792 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10793 {
10794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10795         struct net_device *dev = info->user_ptr[1];
10796         struct wireless_dev *wdev = dev->ieee80211_ptr;
10797         const u8 *peer;
10798         u8 tsid, up;
10799         u16 admitted_time = 0;
10800         int err;
10801
10802         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10803                 return -EOPNOTSUPP;
10804
10805         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10806             !info->attrs[NL80211_ATTR_USER_PRIO])
10807                 return -EINVAL;
10808
10809         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10810         if (tsid >= IEEE80211_NUM_TIDS)
10811                 return -EINVAL;
10812
10813         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10814         if (up >= IEEE80211_NUM_UPS)
10815                 return -EINVAL;
10816
10817         /* WMM uses TIDs 0-7 even for TSPEC */
10818         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10819                 /* TODO: handle 802.11 TSPEC/admission control
10820                  * need more attributes for that (e.g. BA session requirement);
10821                  * change the WMM adminssion test above to allow both then
10822                  */
10823                 return -EINVAL;
10824         }
10825
10826         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10827
10828         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10829                 admitted_time =
10830                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10831                 if (!admitted_time)
10832                         return -EINVAL;
10833         }
10834
10835         wdev_lock(wdev);
10836         switch (wdev->iftype) {
10837         case NL80211_IFTYPE_STATION:
10838         case NL80211_IFTYPE_P2P_CLIENT:
10839                 if (wdev->current_bss)
10840                         break;
10841                 err = -ENOTCONN;
10842                 goto out;
10843         default:
10844                 err = -EOPNOTSUPP;
10845                 goto out;
10846         }
10847
10848         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10849
10850  out:
10851         wdev_unlock(wdev);
10852         return err;
10853 }
10854
10855 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10856 {
10857         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10858         struct net_device *dev = info->user_ptr[1];
10859         struct wireless_dev *wdev = dev->ieee80211_ptr;
10860         const u8 *peer;
10861         u8 tsid;
10862         int err;
10863
10864         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10865                 return -EINVAL;
10866
10867         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10868         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10869
10870         wdev_lock(wdev);
10871         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10872         wdev_unlock(wdev);
10873
10874         return err;
10875 }
10876
10877 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10878                                        struct genl_info *info)
10879 {
10880         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10881         struct net_device *dev = info->user_ptr[1];
10882         struct wireless_dev *wdev = dev->ieee80211_ptr;
10883         struct cfg80211_chan_def chandef = {};
10884         const u8 *addr;
10885         u8 oper_class;
10886         int err;
10887
10888         if (!rdev->ops->tdls_channel_switch ||
10889             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10890                 return -EOPNOTSUPP;
10891
10892         switch (dev->ieee80211_ptr->iftype) {
10893         case NL80211_IFTYPE_STATION:
10894         case NL80211_IFTYPE_P2P_CLIENT:
10895                 break;
10896         default:
10897                 return -EOPNOTSUPP;
10898         }
10899
10900         if (!info->attrs[NL80211_ATTR_MAC] ||
10901             !info->attrs[NL80211_ATTR_OPER_CLASS])
10902                 return -EINVAL;
10903
10904         err = nl80211_parse_chandef(rdev, info, &chandef);
10905         if (err)
10906                 return err;
10907
10908         /*
10909          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10910          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10911          * specification is not defined for them.
10912          */
10913         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10914             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10915             chandef.width != NL80211_CHAN_WIDTH_20)
10916                 return -EINVAL;
10917
10918         /* we will be active on the TDLS link */
10919         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10920                                            wdev->iftype))
10921                 return -EINVAL;
10922
10923         /* don't allow switching to DFS channels */
10924         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10925                 return -EINVAL;
10926
10927         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10928         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10929
10930         wdev_lock(wdev);
10931         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10932         wdev_unlock(wdev);
10933
10934         return err;
10935 }
10936
10937 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10938                                               struct genl_info *info)
10939 {
10940         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10941         struct net_device *dev = info->user_ptr[1];
10942         struct wireless_dev *wdev = dev->ieee80211_ptr;
10943         const u8 *addr;
10944
10945         if (!rdev->ops->tdls_channel_switch ||
10946             !rdev->ops->tdls_cancel_channel_switch ||
10947             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10948                 return -EOPNOTSUPP;
10949
10950         switch (dev->ieee80211_ptr->iftype) {
10951         case NL80211_IFTYPE_STATION:
10952         case NL80211_IFTYPE_P2P_CLIENT:
10953                 break;
10954         default:
10955                 return -EOPNOTSUPP;
10956         }
10957
10958         if (!info->attrs[NL80211_ATTR_MAC])
10959                 return -EINVAL;
10960
10961         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10962
10963         wdev_lock(wdev);
10964         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10965         wdev_unlock(wdev);
10966
10967         return 0;
10968 }
10969
10970 #define NL80211_FLAG_NEED_WIPHY         0x01
10971 #define NL80211_FLAG_NEED_NETDEV        0x02
10972 #define NL80211_FLAG_NEED_RTNL          0x04
10973 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10974 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10975                                          NL80211_FLAG_CHECK_NETDEV_UP)
10976 #define NL80211_FLAG_NEED_WDEV          0x10
10977 /* If a netdev is associated, it must be UP, P2P must be started */
10978 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10979                                          NL80211_FLAG_CHECK_NETDEV_UP)
10980 #define NL80211_FLAG_CLEAR_SKB          0x20
10981
10982 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10983                             struct genl_info *info)
10984 {
10985         struct cfg80211_registered_device *rdev;
10986         struct wireless_dev *wdev;
10987         struct net_device *dev;
10988         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10989
10990         if (rtnl)
10991                 rtnl_lock();
10992
10993         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10994                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10995                 if (IS_ERR(rdev)) {
10996                         if (rtnl)
10997                                 rtnl_unlock();
10998                         return PTR_ERR(rdev);
10999                 }
11000                 info->user_ptr[0] = rdev;
11001         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
11002                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11003                 ASSERT_RTNL();
11004
11005                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
11006                                                   info->attrs);
11007                 if (IS_ERR(wdev)) {
11008                         if (rtnl)
11009                                 rtnl_unlock();
11010                         return PTR_ERR(wdev);
11011                 }
11012
11013                 dev = wdev->netdev;
11014                 rdev = wiphy_to_rdev(wdev->wiphy);
11015
11016                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
11017                         if (!dev) {
11018                                 if (rtnl)
11019                                         rtnl_unlock();
11020                                 return -EINVAL;
11021                         }
11022
11023                         info->user_ptr[1] = dev;
11024                 } else {
11025                         info->user_ptr[1] = wdev;
11026                 }
11027
11028                 if (dev) {
11029                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
11030                             !netif_running(dev)) {
11031                                 if (rtnl)
11032                                         rtnl_unlock();
11033                                 return -ENETDOWN;
11034                         }
11035
11036                         dev_hold(dev);
11037                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
11038                         if (!wdev->p2p_started) {
11039                                 if (rtnl)
11040                                         rtnl_unlock();
11041                                 return -ENETDOWN;
11042                         }
11043                 }
11044
11045                 info->user_ptr[0] = rdev;
11046         }
11047
11048         return 0;
11049 }
11050
11051 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
11052                               struct genl_info *info)
11053 {
11054         if (info->user_ptr[1]) {
11055                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11056                         struct wireless_dev *wdev = info->user_ptr[1];
11057
11058                         if (wdev->netdev)
11059                                 dev_put(wdev->netdev);
11060                 } else {
11061                         dev_put(info->user_ptr[1]);
11062                 }
11063         }
11064
11065         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
11066                 rtnl_unlock();
11067
11068         /* If needed, clear the netlink message payload from the SKB
11069          * as it might contain key data that shouldn't stick around on
11070          * the heap after the SKB is freed. The netlink message header
11071          * is still needed for further processing, so leave it intact.
11072          */
11073         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
11074                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
11075
11076                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
11077         }
11078 }
11079
11080 static const struct genl_ops nl80211_ops[] = {
11081         {
11082                 .cmd = NL80211_CMD_GET_WIPHY,
11083                 .doit = nl80211_get_wiphy,
11084                 .dumpit = nl80211_dump_wiphy,
11085                 .done = nl80211_dump_wiphy_done,
11086                 .policy = nl80211_policy,
11087                 /* can be retrieved by unprivileged users */
11088                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11089                                   NL80211_FLAG_NEED_RTNL,
11090         },
11091         {
11092                 .cmd = NL80211_CMD_SET_WIPHY,
11093                 .doit = nl80211_set_wiphy,
11094                 .policy = nl80211_policy,
11095                 .flags = GENL_UNS_ADMIN_PERM,
11096                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11097         },
11098         {
11099                 .cmd = NL80211_CMD_GET_INTERFACE,
11100                 .doit = nl80211_get_interface,
11101                 .dumpit = nl80211_dump_interface,
11102                 .policy = nl80211_policy,
11103                 /* can be retrieved by unprivileged users */
11104                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11105                                   NL80211_FLAG_NEED_RTNL,
11106         },
11107         {
11108                 .cmd = NL80211_CMD_SET_INTERFACE,
11109                 .doit = nl80211_set_interface,
11110                 .policy = nl80211_policy,
11111                 .flags = GENL_UNS_ADMIN_PERM,
11112                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11113                                   NL80211_FLAG_NEED_RTNL,
11114         },
11115         {
11116                 .cmd = NL80211_CMD_NEW_INTERFACE,
11117                 .doit = nl80211_new_interface,
11118                 .policy = nl80211_policy,
11119                 .flags = GENL_UNS_ADMIN_PERM,
11120                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11121                                   NL80211_FLAG_NEED_RTNL,
11122         },
11123         {
11124                 .cmd = NL80211_CMD_DEL_INTERFACE,
11125                 .doit = nl80211_del_interface,
11126                 .policy = nl80211_policy,
11127                 .flags = GENL_UNS_ADMIN_PERM,
11128                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11129                                   NL80211_FLAG_NEED_RTNL,
11130         },
11131         {
11132                 .cmd = NL80211_CMD_GET_KEY,
11133                 .doit = nl80211_get_key,
11134                 .policy = nl80211_policy,
11135                 .flags = GENL_UNS_ADMIN_PERM,
11136                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11137                                   NL80211_FLAG_NEED_RTNL,
11138         },
11139         {
11140                 .cmd = NL80211_CMD_SET_KEY,
11141                 .doit = nl80211_set_key,
11142                 .policy = nl80211_policy,
11143                 .flags = GENL_UNS_ADMIN_PERM,
11144                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11145                                   NL80211_FLAG_NEED_RTNL |
11146                                   NL80211_FLAG_CLEAR_SKB,
11147         },
11148         {
11149                 .cmd = NL80211_CMD_NEW_KEY,
11150                 .doit = nl80211_new_key,
11151                 .policy = nl80211_policy,
11152                 .flags = GENL_UNS_ADMIN_PERM,
11153                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11154                                   NL80211_FLAG_NEED_RTNL |
11155                                   NL80211_FLAG_CLEAR_SKB,
11156         },
11157         {
11158                 .cmd = NL80211_CMD_DEL_KEY,
11159                 .doit = nl80211_del_key,
11160                 .policy = nl80211_policy,
11161                 .flags = GENL_UNS_ADMIN_PERM,
11162                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11163                                   NL80211_FLAG_NEED_RTNL,
11164         },
11165         {
11166                 .cmd = NL80211_CMD_SET_BEACON,
11167                 .policy = nl80211_policy,
11168                 .flags = GENL_UNS_ADMIN_PERM,
11169                 .doit = nl80211_set_beacon,
11170                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11171                                   NL80211_FLAG_NEED_RTNL,
11172         },
11173         {
11174                 .cmd = NL80211_CMD_START_AP,
11175                 .policy = nl80211_policy,
11176                 .flags = GENL_UNS_ADMIN_PERM,
11177                 .doit = nl80211_start_ap,
11178                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11179                                   NL80211_FLAG_NEED_RTNL,
11180         },
11181         {
11182                 .cmd = NL80211_CMD_STOP_AP,
11183                 .policy = nl80211_policy,
11184                 .flags = GENL_UNS_ADMIN_PERM,
11185                 .doit = nl80211_stop_ap,
11186                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11187                                   NL80211_FLAG_NEED_RTNL,
11188         },
11189         {
11190                 .cmd = NL80211_CMD_GET_STATION,
11191                 .doit = nl80211_get_station,
11192                 .dumpit = nl80211_dump_station,
11193                 .policy = nl80211_policy,
11194                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11195                                   NL80211_FLAG_NEED_RTNL,
11196         },
11197         {
11198                 .cmd = NL80211_CMD_SET_STATION,
11199                 .doit = nl80211_set_station,
11200                 .policy = nl80211_policy,
11201                 .flags = GENL_UNS_ADMIN_PERM,
11202                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11203                                   NL80211_FLAG_NEED_RTNL,
11204         },
11205         {
11206                 .cmd = NL80211_CMD_NEW_STATION,
11207                 .doit = nl80211_new_station,
11208                 .policy = nl80211_policy,
11209                 .flags = GENL_UNS_ADMIN_PERM,
11210                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11211                                   NL80211_FLAG_NEED_RTNL,
11212         },
11213         {
11214                 .cmd = NL80211_CMD_DEL_STATION,
11215                 .doit = nl80211_del_station,
11216                 .policy = nl80211_policy,
11217                 .flags = GENL_UNS_ADMIN_PERM,
11218                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11219                                   NL80211_FLAG_NEED_RTNL,
11220         },
11221         {
11222                 .cmd = NL80211_CMD_GET_MPATH,
11223                 .doit = nl80211_get_mpath,
11224                 .dumpit = nl80211_dump_mpath,
11225                 .policy = nl80211_policy,
11226                 .flags = GENL_UNS_ADMIN_PERM,
11227                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11228                                   NL80211_FLAG_NEED_RTNL,
11229         },
11230         {
11231                 .cmd = NL80211_CMD_GET_MPP,
11232                 .doit = nl80211_get_mpp,
11233                 .dumpit = nl80211_dump_mpp,
11234                 .policy = nl80211_policy,
11235                 .flags = GENL_UNS_ADMIN_PERM,
11236                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11237                                   NL80211_FLAG_NEED_RTNL,
11238         },
11239         {
11240                 .cmd = NL80211_CMD_SET_MPATH,
11241                 .doit = nl80211_set_mpath,
11242                 .policy = nl80211_policy,
11243                 .flags = GENL_UNS_ADMIN_PERM,
11244                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11245                                   NL80211_FLAG_NEED_RTNL,
11246         },
11247         {
11248                 .cmd = NL80211_CMD_NEW_MPATH,
11249                 .doit = nl80211_new_mpath,
11250                 .policy = nl80211_policy,
11251                 .flags = GENL_UNS_ADMIN_PERM,
11252                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11253                                   NL80211_FLAG_NEED_RTNL,
11254         },
11255         {
11256                 .cmd = NL80211_CMD_DEL_MPATH,
11257                 .doit = nl80211_del_mpath,
11258                 .policy = nl80211_policy,
11259                 .flags = GENL_UNS_ADMIN_PERM,
11260                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11261                                   NL80211_FLAG_NEED_RTNL,
11262         },
11263         {
11264                 .cmd = NL80211_CMD_SET_BSS,
11265                 .doit = nl80211_set_bss,
11266                 .policy = nl80211_policy,
11267                 .flags = GENL_UNS_ADMIN_PERM,
11268                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11269                                   NL80211_FLAG_NEED_RTNL,
11270         },
11271         {
11272                 .cmd = NL80211_CMD_GET_REG,
11273                 .doit = nl80211_get_reg_do,
11274                 .dumpit = nl80211_get_reg_dump,
11275                 .policy = nl80211_policy,
11276                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11277                 /* can be retrieved by unprivileged users */
11278         },
11279 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11280         {
11281                 .cmd = NL80211_CMD_SET_REG,
11282                 .doit = nl80211_set_reg,
11283                 .policy = nl80211_policy,
11284                 .flags = GENL_ADMIN_PERM,
11285                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11286         },
11287 #endif
11288         {
11289                 .cmd = NL80211_CMD_REQ_SET_REG,
11290                 .doit = nl80211_req_set_reg,
11291                 .policy = nl80211_policy,
11292                 .flags = GENL_ADMIN_PERM,
11293         },
11294         {
11295                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11296                 .doit = nl80211_get_mesh_config,
11297                 .policy = nl80211_policy,
11298                 /* can be retrieved by unprivileged users */
11299                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11300                                   NL80211_FLAG_NEED_RTNL,
11301         },
11302         {
11303                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11304                 .doit = nl80211_update_mesh_config,
11305                 .policy = nl80211_policy,
11306                 .flags = GENL_UNS_ADMIN_PERM,
11307                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11308                                   NL80211_FLAG_NEED_RTNL,
11309         },
11310         {
11311                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11312                 .doit = nl80211_trigger_scan,
11313                 .policy = nl80211_policy,
11314                 .flags = GENL_UNS_ADMIN_PERM,
11315                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11316                                   NL80211_FLAG_NEED_RTNL,
11317         },
11318         {
11319                 .cmd = NL80211_CMD_ABORT_SCAN,
11320                 .doit = nl80211_abort_scan,
11321                 .policy = nl80211_policy,
11322                 .flags = GENL_UNS_ADMIN_PERM,
11323                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11324                                   NL80211_FLAG_NEED_RTNL,
11325         },
11326         {
11327                 .cmd = NL80211_CMD_GET_SCAN,
11328                 .policy = nl80211_policy,
11329                 .dumpit = nl80211_dump_scan,
11330         },
11331         {
11332                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11333                 .doit = nl80211_start_sched_scan,
11334                 .policy = nl80211_policy,
11335                 .flags = GENL_UNS_ADMIN_PERM,
11336                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11337                                   NL80211_FLAG_NEED_RTNL,
11338         },
11339         {
11340                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11341                 .doit = nl80211_stop_sched_scan,
11342                 .policy = nl80211_policy,
11343                 .flags = GENL_UNS_ADMIN_PERM,
11344                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11345                                   NL80211_FLAG_NEED_RTNL,
11346         },
11347         {
11348                 .cmd = NL80211_CMD_AUTHENTICATE,
11349                 .doit = nl80211_authenticate,
11350                 .policy = nl80211_policy,
11351                 .flags = GENL_UNS_ADMIN_PERM,
11352                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11353                                   NL80211_FLAG_NEED_RTNL |
11354                                   NL80211_FLAG_CLEAR_SKB,
11355         },
11356         {
11357                 .cmd = NL80211_CMD_ASSOCIATE,
11358                 .doit = nl80211_associate,
11359                 .policy = nl80211_policy,
11360                 .flags = GENL_UNS_ADMIN_PERM,
11361                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11362                                   NL80211_FLAG_NEED_RTNL,
11363         },
11364         {
11365                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11366                 .doit = nl80211_deauthenticate,
11367                 .policy = nl80211_policy,
11368                 .flags = GENL_UNS_ADMIN_PERM,
11369                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11370                                   NL80211_FLAG_NEED_RTNL,
11371         },
11372         {
11373                 .cmd = NL80211_CMD_DISASSOCIATE,
11374                 .doit = nl80211_disassociate,
11375                 .policy = nl80211_policy,
11376                 .flags = GENL_UNS_ADMIN_PERM,
11377                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11378                                   NL80211_FLAG_NEED_RTNL,
11379         },
11380         {
11381                 .cmd = NL80211_CMD_JOIN_IBSS,
11382                 .doit = nl80211_join_ibss,
11383                 .policy = nl80211_policy,
11384                 .flags = GENL_UNS_ADMIN_PERM,
11385                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11386                                   NL80211_FLAG_NEED_RTNL,
11387         },
11388         {
11389                 .cmd = NL80211_CMD_LEAVE_IBSS,
11390                 .doit = nl80211_leave_ibss,
11391                 .policy = nl80211_policy,
11392                 .flags = GENL_UNS_ADMIN_PERM,
11393                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11394                                   NL80211_FLAG_NEED_RTNL,
11395         },
11396 #ifdef CONFIG_NL80211_TESTMODE
11397         {
11398                 .cmd = NL80211_CMD_TESTMODE,
11399                 .doit = nl80211_testmode_do,
11400                 .dumpit = nl80211_testmode_dump,
11401                 .policy = nl80211_policy,
11402                 .flags = GENL_UNS_ADMIN_PERM,
11403                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11404                                   NL80211_FLAG_NEED_RTNL,
11405         },
11406 #endif
11407         {
11408                 .cmd = NL80211_CMD_CONNECT,
11409                 .doit = nl80211_connect,
11410                 .policy = nl80211_policy,
11411                 .flags = GENL_UNS_ADMIN_PERM,
11412                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11413                                   NL80211_FLAG_NEED_RTNL,
11414         },
11415         {
11416                 .cmd = NL80211_CMD_DISCONNECT,
11417                 .doit = nl80211_disconnect,
11418                 .policy = nl80211_policy,
11419                 .flags = GENL_UNS_ADMIN_PERM,
11420                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11421                                   NL80211_FLAG_NEED_RTNL,
11422         },
11423         {
11424                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11425                 .doit = nl80211_wiphy_netns,
11426                 .policy = nl80211_policy,
11427                 .flags = GENL_UNS_ADMIN_PERM,
11428                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11429                                   NL80211_FLAG_NEED_RTNL,
11430         },
11431         {
11432                 .cmd = NL80211_CMD_GET_SURVEY,
11433                 .policy = nl80211_policy,
11434                 .dumpit = nl80211_dump_survey,
11435         },
11436         {
11437                 .cmd = NL80211_CMD_SET_PMKSA,
11438                 .doit = nl80211_setdel_pmksa,
11439                 .policy = nl80211_policy,
11440                 .flags = GENL_UNS_ADMIN_PERM,
11441                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11442                                   NL80211_FLAG_NEED_RTNL,
11443         },
11444         {
11445                 .cmd = NL80211_CMD_DEL_PMKSA,
11446                 .doit = nl80211_setdel_pmksa,
11447                 .policy = nl80211_policy,
11448                 .flags = GENL_UNS_ADMIN_PERM,
11449                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11450                                   NL80211_FLAG_NEED_RTNL,
11451         },
11452         {
11453                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11454                 .doit = nl80211_flush_pmksa,
11455                 .policy = nl80211_policy,
11456                 .flags = GENL_UNS_ADMIN_PERM,
11457                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11458                                   NL80211_FLAG_NEED_RTNL,
11459         },
11460         {
11461                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11462                 .doit = nl80211_remain_on_channel,
11463                 .policy = nl80211_policy,
11464                 .flags = GENL_UNS_ADMIN_PERM,
11465                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11466                                   NL80211_FLAG_NEED_RTNL,
11467         },
11468         {
11469                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11470                 .doit = nl80211_cancel_remain_on_channel,
11471                 .policy = nl80211_policy,
11472                 .flags = GENL_UNS_ADMIN_PERM,
11473                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11474                                   NL80211_FLAG_NEED_RTNL,
11475         },
11476         {
11477                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11478                 .doit = nl80211_set_tx_bitrate_mask,
11479                 .policy = nl80211_policy,
11480                 .flags = GENL_UNS_ADMIN_PERM,
11481                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11482                                   NL80211_FLAG_NEED_RTNL,
11483         },
11484         {
11485                 .cmd = NL80211_CMD_REGISTER_FRAME,
11486                 .doit = nl80211_register_mgmt,
11487                 .policy = nl80211_policy,
11488                 .flags = GENL_UNS_ADMIN_PERM,
11489                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11490                                   NL80211_FLAG_NEED_RTNL,
11491         },
11492         {
11493                 .cmd = NL80211_CMD_FRAME,
11494                 .doit = nl80211_tx_mgmt,
11495                 .policy = nl80211_policy,
11496                 .flags = GENL_UNS_ADMIN_PERM,
11497                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11498                                   NL80211_FLAG_NEED_RTNL,
11499         },
11500         {
11501                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11502                 .doit = nl80211_tx_mgmt_cancel_wait,
11503                 .policy = nl80211_policy,
11504                 .flags = GENL_UNS_ADMIN_PERM,
11505                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11506                                   NL80211_FLAG_NEED_RTNL,
11507         },
11508         {
11509                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11510                 .doit = nl80211_set_power_save,
11511                 .policy = nl80211_policy,
11512                 .flags = GENL_UNS_ADMIN_PERM,
11513                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11514                                   NL80211_FLAG_NEED_RTNL,
11515         },
11516         {
11517                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11518                 .doit = nl80211_get_power_save,
11519                 .policy = nl80211_policy,
11520                 /* can be retrieved by unprivileged users */
11521                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11522                                   NL80211_FLAG_NEED_RTNL,
11523         },
11524         {
11525                 .cmd = NL80211_CMD_SET_CQM,
11526                 .doit = nl80211_set_cqm,
11527                 .policy = nl80211_policy,
11528                 .flags = GENL_UNS_ADMIN_PERM,
11529                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11530                                   NL80211_FLAG_NEED_RTNL,
11531         },
11532         {
11533                 .cmd = NL80211_CMD_SET_CHANNEL,
11534                 .doit = nl80211_set_channel,
11535                 .policy = nl80211_policy,
11536                 .flags = GENL_UNS_ADMIN_PERM,
11537                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11538                                   NL80211_FLAG_NEED_RTNL,
11539         },
11540         {
11541                 .cmd = NL80211_CMD_SET_WDS_PEER,
11542                 .doit = nl80211_set_wds_peer,
11543                 .policy = nl80211_policy,
11544                 .flags = GENL_UNS_ADMIN_PERM,
11545                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11546                                   NL80211_FLAG_NEED_RTNL,
11547         },
11548         {
11549                 .cmd = NL80211_CMD_JOIN_MESH,
11550                 .doit = nl80211_join_mesh,
11551                 .policy = nl80211_policy,
11552                 .flags = GENL_UNS_ADMIN_PERM,
11553                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11554                                   NL80211_FLAG_NEED_RTNL,
11555         },
11556         {
11557                 .cmd = NL80211_CMD_LEAVE_MESH,
11558                 .doit = nl80211_leave_mesh,
11559                 .policy = nl80211_policy,
11560                 .flags = GENL_UNS_ADMIN_PERM,
11561                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11562                                   NL80211_FLAG_NEED_RTNL,
11563         },
11564         {
11565                 .cmd = NL80211_CMD_JOIN_OCB,
11566                 .doit = nl80211_join_ocb,
11567                 .policy = nl80211_policy,
11568                 .flags = GENL_UNS_ADMIN_PERM,
11569                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11570                                   NL80211_FLAG_NEED_RTNL,
11571         },
11572         {
11573                 .cmd = NL80211_CMD_LEAVE_OCB,
11574                 .doit = nl80211_leave_ocb,
11575                 .policy = nl80211_policy,
11576                 .flags = GENL_UNS_ADMIN_PERM,
11577                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11578                                   NL80211_FLAG_NEED_RTNL,
11579         },
11580 #ifdef CONFIG_PM
11581         {
11582                 .cmd = NL80211_CMD_GET_WOWLAN,
11583                 .doit = nl80211_get_wowlan,
11584                 .policy = nl80211_policy,
11585                 /* can be retrieved by unprivileged users */
11586                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11587                                   NL80211_FLAG_NEED_RTNL,
11588         },
11589         {
11590                 .cmd = NL80211_CMD_SET_WOWLAN,
11591                 .doit = nl80211_set_wowlan,
11592                 .policy = nl80211_policy,
11593                 .flags = GENL_UNS_ADMIN_PERM,
11594                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11595                                   NL80211_FLAG_NEED_RTNL,
11596         },
11597 #endif
11598         {
11599                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11600                 .doit = nl80211_set_rekey_data,
11601                 .policy = nl80211_policy,
11602                 .flags = GENL_UNS_ADMIN_PERM,
11603                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11604                                   NL80211_FLAG_NEED_RTNL |
11605                                   NL80211_FLAG_CLEAR_SKB,
11606         },
11607         {
11608                 .cmd = NL80211_CMD_TDLS_MGMT,
11609                 .doit = nl80211_tdls_mgmt,
11610                 .policy = nl80211_policy,
11611                 .flags = GENL_UNS_ADMIN_PERM,
11612                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11613                                   NL80211_FLAG_NEED_RTNL,
11614         },
11615         {
11616                 .cmd = NL80211_CMD_TDLS_OPER,
11617                 .doit = nl80211_tdls_oper,
11618                 .policy = nl80211_policy,
11619                 .flags = GENL_UNS_ADMIN_PERM,
11620                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11621                                   NL80211_FLAG_NEED_RTNL,
11622         },
11623         {
11624                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11625                 .doit = nl80211_register_unexpected_frame,
11626                 .policy = nl80211_policy,
11627                 .flags = GENL_UNS_ADMIN_PERM,
11628                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11629                                   NL80211_FLAG_NEED_RTNL,
11630         },
11631         {
11632                 .cmd = NL80211_CMD_PROBE_CLIENT,
11633                 .doit = nl80211_probe_client,
11634                 .policy = nl80211_policy,
11635                 .flags = GENL_UNS_ADMIN_PERM,
11636                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11637                                   NL80211_FLAG_NEED_RTNL,
11638         },
11639         {
11640                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11641                 .doit = nl80211_register_beacons,
11642                 .policy = nl80211_policy,
11643                 .flags = GENL_UNS_ADMIN_PERM,
11644                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11645                                   NL80211_FLAG_NEED_RTNL,
11646         },
11647         {
11648                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11649                 .doit = nl80211_set_noack_map,
11650                 .policy = nl80211_policy,
11651                 .flags = GENL_UNS_ADMIN_PERM,
11652                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11653                                   NL80211_FLAG_NEED_RTNL,
11654         },
11655         {
11656                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11657                 .doit = nl80211_start_p2p_device,
11658                 .policy = nl80211_policy,
11659                 .flags = GENL_UNS_ADMIN_PERM,
11660                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11661                                   NL80211_FLAG_NEED_RTNL,
11662         },
11663         {
11664                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11665                 .doit = nl80211_stop_p2p_device,
11666                 .policy = nl80211_policy,
11667                 .flags = GENL_UNS_ADMIN_PERM,
11668                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11669                                   NL80211_FLAG_NEED_RTNL,
11670         },
11671         {
11672                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11673                 .doit = nl80211_set_mcast_rate,
11674                 .policy = nl80211_policy,
11675                 .flags = GENL_UNS_ADMIN_PERM,
11676                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11677                                   NL80211_FLAG_NEED_RTNL,
11678         },
11679         {
11680                 .cmd = NL80211_CMD_SET_MAC_ACL,
11681                 .doit = nl80211_set_mac_acl,
11682                 .policy = nl80211_policy,
11683                 .flags = GENL_UNS_ADMIN_PERM,
11684                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11685                                   NL80211_FLAG_NEED_RTNL,
11686         },
11687         {
11688                 .cmd = NL80211_CMD_RADAR_DETECT,
11689                 .doit = nl80211_start_radar_detection,
11690                 .policy = nl80211_policy,
11691                 .flags = GENL_UNS_ADMIN_PERM,
11692                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11693                                   NL80211_FLAG_NEED_RTNL,
11694         },
11695         {
11696                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11697                 .doit = nl80211_get_protocol_features,
11698                 .policy = nl80211_policy,
11699         },
11700         {
11701                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11702                 .doit = nl80211_update_ft_ies,
11703                 .policy = nl80211_policy,
11704                 .flags = GENL_UNS_ADMIN_PERM,
11705                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11706                                   NL80211_FLAG_NEED_RTNL,
11707         },
11708         {
11709                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11710                 .doit = nl80211_crit_protocol_start,
11711                 .policy = nl80211_policy,
11712                 .flags = GENL_UNS_ADMIN_PERM,
11713                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11714                                   NL80211_FLAG_NEED_RTNL,
11715         },
11716         {
11717                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11718                 .doit = nl80211_crit_protocol_stop,
11719                 .policy = nl80211_policy,
11720                 .flags = GENL_UNS_ADMIN_PERM,
11721                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11722                                   NL80211_FLAG_NEED_RTNL,
11723         },
11724         {
11725                 .cmd = NL80211_CMD_GET_COALESCE,
11726                 .doit = nl80211_get_coalesce,
11727                 .policy = nl80211_policy,
11728                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11729                                   NL80211_FLAG_NEED_RTNL,
11730         },
11731         {
11732                 .cmd = NL80211_CMD_SET_COALESCE,
11733                 .doit = nl80211_set_coalesce,
11734                 .policy = nl80211_policy,
11735                 .flags = GENL_UNS_ADMIN_PERM,
11736                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11737                                   NL80211_FLAG_NEED_RTNL,
11738         },
11739         {
11740                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11741                 .doit = nl80211_channel_switch,
11742                 .policy = nl80211_policy,
11743                 .flags = GENL_UNS_ADMIN_PERM,
11744                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11745                                   NL80211_FLAG_NEED_RTNL,
11746         },
11747         {
11748                 .cmd = NL80211_CMD_VENDOR,
11749                 .doit = nl80211_vendor_cmd,
11750                 .dumpit = nl80211_vendor_cmd_dump,
11751                 .policy = nl80211_policy,
11752                 .flags = GENL_UNS_ADMIN_PERM,
11753                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11754                                   NL80211_FLAG_NEED_RTNL,
11755         },
11756         {
11757                 .cmd = NL80211_CMD_SET_QOS_MAP,
11758                 .doit = nl80211_set_qos_map,
11759                 .policy = nl80211_policy,
11760                 .flags = GENL_UNS_ADMIN_PERM,
11761                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11762                                   NL80211_FLAG_NEED_RTNL,
11763         },
11764         {
11765                 .cmd = NL80211_CMD_ADD_TX_TS,
11766                 .doit = nl80211_add_tx_ts,
11767                 .policy = nl80211_policy,
11768                 .flags = GENL_UNS_ADMIN_PERM,
11769                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11770                                   NL80211_FLAG_NEED_RTNL,
11771         },
11772         {
11773                 .cmd = NL80211_CMD_DEL_TX_TS,
11774                 .doit = nl80211_del_tx_ts,
11775                 .policy = nl80211_policy,
11776                 .flags = GENL_UNS_ADMIN_PERM,
11777                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11778                                   NL80211_FLAG_NEED_RTNL,
11779         },
11780         {
11781                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11782                 .doit = nl80211_tdls_channel_switch,
11783                 .policy = nl80211_policy,
11784                 .flags = GENL_UNS_ADMIN_PERM,
11785                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11786                                   NL80211_FLAG_NEED_RTNL,
11787         },
11788         {
11789                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11790                 .doit = nl80211_tdls_cancel_channel_switch,
11791                 .policy = nl80211_policy,
11792                 .flags = GENL_UNS_ADMIN_PERM,
11793                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11794                                   NL80211_FLAG_NEED_RTNL,
11795         },
11796 };
11797
11798 /* notification functions */
11799
11800 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11801                           enum nl80211_commands cmd)
11802 {
11803         struct sk_buff *msg;
11804         struct nl80211_dump_wiphy_state state = {};
11805
11806         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11807                 cmd != NL80211_CMD_DEL_WIPHY);
11808
11809         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11810         if (!msg)
11811                 return;
11812
11813         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11814                 nlmsg_free(msg);
11815                 return;
11816         }
11817
11818         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11819                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11820 }
11821
11822 static int nl80211_add_scan_req(struct sk_buff *msg,
11823                                 struct cfg80211_registered_device *rdev)
11824 {
11825         struct cfg80211_scan_request *req = rdev->scan_req;
11826         struct nlattr *nest;
11827         int i;
11828
11829         if (WARN_ON(!req))
11830                 return 0;
11831
11832         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11833         if (!nest)
11834                 goto nla_put_failure;
11835         for (i = 0; i < req->n_ssids; i++) {
11836                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11837                         goto nla_put_failure;
11838         }
11839         nla_nest_end(msg, nest);
11840
11841         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11842         if (!nest)
11843                 goto nla_put_failure;
11844         for (i = 0; i < req->n_channels; i++) {
11845                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11846                         goto nla_put_failure;
11847         }
11848         nla_nest_end(msg, nest);
11849
11850         if (req->ie &&
11851             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11852                 goto nla_put_failure;
11853
11854         if (req->flags &&
11855             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11856                 goto nla_put_failure;
11857
11858         if (req->info.scan_start_tsf &&
11859             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
11860                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
11861              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
11862                      req->info.tsf_bssid)))
11863                 goto nla_put_failure;
11864
11865         return 0;
11866  nla_put_failure:
11867         return -ENOBUFS;
11868 }
11869
11870 static int nl80211_send_scan_msg(struct sk_buff *msg,
11871                                  struct cfg80211_registered_device *rdev,
11872                                  struct wireless_dev *wdev,
11873                                  u32 portid, u32 seq, int flags,
11874                                  u32 cmd)
11875 {
11876         void *hdr;
11877
11878         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11879         if (!hdr)
11880                 return -1;
11881
11882         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11883             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11884                                          wdev->netdev->ifindex)) ||
11885             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11886                               NL80211_ATTR_PAD))
11887                 goto nla_put_failure;
11888
11889         /* ignore errors and send incomplete event anyway */
11890         nl80211_add_scan_req(msg, rdev);
11891
11892         genlmsg_end(msg, hdr);
11893         return 0;
11894
11895  nla_put_failure:
11896         genlmsg_cancel(msg, hdr);
11897         return -EMSGSIZE;
11898 }
11899
11900 static int
11901 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11902                             struct cfg80211_registered_device *rdev,
11903                             struct net_device *netdev,
11904                             u32 portid, u32 seq, int flags, u32 cmd)
11905 {
11906         void *hdr;
11907
11908         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11909         if (!hdr)
11910                 return -1;
11911
11912         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11913             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11914                 goto nla_put_failure;
11915
11916         genlmsg_end(msg, hdr);
11917         return 0;
11918
11919  nla_put_failure:
11920         genlmsg_cancel(msg, hdr);
11921         return -EMSGSIZE;
11922 }
11923
11924 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11925                              struct wireless_dev *wdev)
11926 {
11927         struct sk_buff *msg;
11928
11929         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11930         if (!msg)
11931                 return;
11932
11933         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11934                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11935                 nlmsg_free(msg);
11936                 return;
11937         }
11938
11939         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11940                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11941 }
11942
11943 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11944                                        struct wireless_dev *wdev, bool aborted)
11945 {
11946         struct sk_buff *msg;
11947
11948         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11949         if (!msg)
11950                 return NULL;
11951
11952         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11953                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11954                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11955                 nlmsg_free(msg);
11956                 return NULL;
11957         }
11958
11959         return msg;
11960 }
11961
11962 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11963                               struct sk_buff *msg)
11964 {
11965         if (!msg)
11966                 return;
11967
11968         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11969                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11970 }
11971
11972 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11973                                      struct net_device *netdev)
11974 {
11975         struct sk_buff *msg;
11976
11977         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11978         if (!msg)
11979                 return;
11980
11981         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11982                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11983                 nlmsg_free(msg);
11984                 return;
11985         }
11986
11987         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11988                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11989 }
11990
11991 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11992                              struct net_device *netdev, u32 cmd)
11993 {
11994         struct sk_buff *msg;
11995
11996         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11997         if (!msg)
11998                 return;
11999
12000         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
12001                 nlmsg_free(msg);
12002                 return;
12003         }
12004
12005         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12006                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12007 }
12008
12009 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
12010                                           struct regulatory_request *request)
12011 {
12012         /* Userspace can always count this one always being set */
12013         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
12014                 goto nla_put_failure;
12015
12016         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
12017                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12018                                NL80211_REGDOM_TYPE_WORLD))
12019                         goto nla_put_failure;
12020         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
12021                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12022                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
12023                         goto nla_put_failure;
12024         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
12025                    request->intersect) {
12026                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12027                                NL80211_REGDOM_TYPE_INTERSECTION))
12028                         goto nla_put_failure;
12029         } else {
12030                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12031                                NL80211_REGDOM_TYPE_COUNTRY) ||
12032                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
12033                                    request->alpha2))
12034                         goto nla_put_failure;
12035         }
12036
12037         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
12038                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
12039
12040                 if (wiphy &&
12041                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
12042                         goto nla_put_failure;
12043
12044                 if (wiphy &&
12045                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
12046                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
12047                         goto nla_put_failure;
12048         }
12049
12050         return true;
12051
12052 nla_put_failure:
12053         return false;
12054 }
12055
12056 /*
12057  * This can happen on global regulatory changes or device specific settings
12058  * based on custom regulatory domains.
12059  */
12060 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
12061                                      struct regulatory_request *request)
12062 {
12063         struct sk_buff *msg;
12064         void *hdr;
12065
12066         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12067         if (!msg)
12068                 return;
12069
12070         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
12071         if (!hdr) {
12072                 nlmsg_free(msg);
12073                 return;
12074         }
12075
12076         if (nl80211_reg_change_event_fill(msg, request) == false)
12077                 goto nla_put_failure;
12078
12079         genlmsg_end(msg, hdr);
12080
12081         rcu_read_lock();
12082         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12083                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12084         rcu_read_unlock();
12085
12086         return;
12087
12088 nla_put_failure:
12089         genlmsg_cancel(msg, hdr);
12090         nlmsg_free(msg);
12091 }
12092
12093 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
12094                                     struct net_device *netdev,
12095                                     const u8 *buf, size_t len,
12096                                     enum nl80211_commands cmd, gfp_t gfp,
12097                                     int uapsd_queues)
12098 {
12099         struct sk_buff *msg;
12100         void *hdr;
12101
12102         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12103         if (!msg)
12104                 return;
12105
12106         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12107         if (!hdr) {
12108                 nlmsg_free(msg);
12109                 return;
12110         }
12111
12112         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12113             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12114             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
12115                 goto nla_put_failure;
12116
12117         if (uapsd_queues >= 0) {
12118                 struct nlattr *nla_wmm =
12119                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
12120                 if (!nla_wmm)
12121                         goto nla_put_failure;
12122
12123                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
12124                                uapsd_queues))
12125                         goto nla_put_failure;
12126
12127                 nla_nest_end(msg, nla_wmm);
12128         }
12129
12130         genlmsg_end(msg, hdr);
12131
12132         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12133                                 NL80211_MCGRP_MLME, gfp);
12134         return;
12135
12136  nla_put_failure:
12137         genlmsg_cancel(msg, hdr);
12138         nlmsg_free(msg);
12139 }
12140
12141 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
12142                           struct net_device *netdev, const u8 *buf,
12143                           size_t len, gfp_t gfp)
12144 {
12145         nl80211_send_mlme_event(rdev, netdev, buf, len,
12146                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
12147 }
12148
12149 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
12150                            struct net_device *netdev, const u8 *buf,
12151                            size_t len, gfp_t gfp, int uapsd_queues)
12152 {
12153         nl80211_send_mlme_event(rdev, netdev, buf, len,
12154                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12155 }
12156
12157 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12158                          struct net_device *netdev, const u8 *buf,
12159                          size_t len, gfp_t gfp)
12160 {
12161         nl80211_send_mlme_event(rdev, netdev, buf, len,
12162                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12163 }
12164
12165 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12166                            struct net_device *netdev, const u8 *buf,
12167                            size_t len, gfp_t gfp)
12168 {
12169         nl80211_send_mlme_event(rdev, netdev, buf, len,
12170                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12171 }
12172
12173 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12174                                   size_t len)
12175 {
12176         struct wireless_dev *wdev = dev->ieee80211_ptr;
12177         struct wiphy *wiphy = wdev->wiphy;
12178         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12179         const struct ieee80211_mgmt *mgmt = (void *)buf;
12180         u32 cmd;
12181
12182         if (WARN_ON(len < 2))
12183                 return;
12184
12185         if (ieee80211_is_deauth(mgmt->frame_control))
12186                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12187         else
12188                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12189
12190         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12191         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12192 }
12193 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12194
12195 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12196                                       struct net_device *netdev, int cmd,
12197                                       const u8 *addr, gfp_t gfp)
12198 {
12199         struct sk_buff *msg;
12200         void *hdr;
12201
12202         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12203         if (!msg)
12204                 return;
12205
12206         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12207         if (!hdr) {
12208                 nlmsg_free(msg);
12209                 return;
12210         }
12211
12212         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12213             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12214             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12215             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12216                 goto nla_put_failure;
12217
12218         genlmsg_end(msg, hdr);
12219
12220         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12221                                 NL80211_MCGRP_MLME, gfp);
12222         return;
12223
12224  nla_put_failure:
12225         genlmsg_cancel(msg, hdr);
12226         nlmsg_free(msg);
12227 }
12228
12229 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12230                                struct net_device *netdev, const u8 *addr,
12231                                gfp_t gfp)
12232 {
12233         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12234                                   addr, gfp);
12235 }
12236
12237 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12238                                 struct net_device *netdev, const u8 *addr,
12239                                 gfp_t gfp)
12240 {
12241         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12242                                   addr, gfp);
12243 }
12244
12245 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12246                                  struct net_device *netdev, const u8 *bssid,
12247                                  const u8 *req_ie, size_t req_ie_len,
12248                                  const u8 *resp_ie, size_t resp_ie_len,
12249                                  int status, gfp_t gfp)
12250 {
12251         struct sk_buff *msg;
12252         void *hdr;
12253
12254         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12255         if (!msg)
12256                 return;
12257
12258         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12259         if (!hdr) {
12260                 nlmsg_free(msg);
12261                 return;
12262         }
12263
12264         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12265             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12266             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12267             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
12268                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
12269                         status) ||
12270             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
12271             (req_ie &&
12272              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12273             (resp_ie &&
12274              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12275                 goto nla_put_failure;
12276
12277         genlmsg_end(msg, hdr);
12278
12279         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12280                                 NL80211_MCGRP_MLME, gfp);
12281         return;
12282
12283  nla_put_failure:
12284         genlmsg_cancel(msg, hdr);
12285         nlmsg_free(msg);
12286 }
12287
12288 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12289                          struct net_device *netdev, const u8 *bssid,
12290                          const u8 *req_ie, size_t req_ie_len,
12291                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12292 {
12293         struct sk_buff *msg;
12294         void *hdr;
12295
12296         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12297         if (!msg)
12298                 return;
12299
12300         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12301         if (!hdr) {
12302                 nlmsg_free(msg);
12303                 return;
12304         }
12305
12306         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12307             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12308             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12309             (req_ie &&
12310              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12311             (resp_ie &&
12312              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12313                 goto nla_put_failure;
12314
12315         genlmsg_end(msg, hdr);
12316
12317         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12318                                 NL80211_MCGRP_MLME, gfp);
12319         return;
12320
12321  nla_put_failure:
12322         genlmsg_cancel(msg, hdr);
12323         nlmsg_free(msg);
12324 }
12325
12326 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12327                                struct net_device *netdev, u16 reason,
12328                                const u8 *ie, size_t ie_len, bool from_ap)
12329 {
12330         struct sk_buff *msg;
12331         void *hdr;
12332
12333         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12334         if (!msg)
12335                 return;
12336
12337         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12338         if (!hdr) {
12339                 nlmsg_free(msg);
12340                 return;
12341         }
12342
12343         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12344             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12345             (from_ap && reason &&
12346              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12347             (from_ap &&
12348              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12349             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12350                 goto nla_put_failure;
12351
12352         genlmsg_end(msg, hdr);
12353
12354         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12355                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12356         return;
12357
12358  nla_put_failure:
12359         genlmsg_cancel(msg, hdr);
12360         nlmsg_free(msg);
12361 }
12362
12363 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12364                              struct net_device *netdev, const u8 *bssid,
12365                              gfp_t gfp)
12366 {
12367         struct sk_buff *msg;
12368         void *hdr;
12369
12370         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12371         if (!msg)
12372                 return;
12373
12374         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12375         if (!hdr) {
12376                 nlmsg_free(msg);
12377                 return;
12378         }
12379
12380         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12381             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12382             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12383                 goto nla_put_failure;
12384
12385         genlmsg_end(msg, hdr);
12386
12387         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12388                                 NL80211_MCGRP_MLME, gfp);
12389         return;
12390
12391  nla_put_failure:
12392         genlmsg_cancel(msg, hdr);
12393         nlmsg_free(msg);
12394 }
12395
12396 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12397                                         const u8* ie, u8 ie_len, gfp_t gfp)
12398 {
12399         struct wireless_dev *wdev = dev->ieee80211_ptr;
12400         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12401         struct sk_buff *msg;
12402         void *hdr;
12403
12404         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12405                 return;
12406
12407         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12408
12409         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12410         if (!msg)
12411                 return;
12412
12413         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12414         if (!hdr) {
12415                 nlmsg_free(msg);
12416                 return;
12417         }
12418
12419         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12420             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12421             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12422             (ie_len && ie &&
12423              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12424                 goto nla_put_failure;
12425
12426         genlmsg_end(msg, hdr);
12427
12428         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12429                                 NL80211_MCGRP_MLME, gfp);
12430         return;
12431
12432  nla_put_failure:
12433         genlmsg_cancel(msg, hdr);
12434         nlmsg_free(msg);
12435 }
12436 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12437
12438 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12439                                  struct net_device *netdev, const u8 *addr,
12440                                  enum nl80211_key_type key_type, int key_id,
12441                                  const u8 *tsc, gfp_t gfp)
12442 {
12443         struct sk_buff *msg;
12444         void *hdr;
12445
12446         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12447         if (!msg)
12448                 return;
12449
12450         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12451         if (!hdr) {
12452                 nlmsg_free(msg);
12453                 return;
12454         }
12455
12456         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12457             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12458             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12459             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12460             (key_id != -1 &&
12461              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12462             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12463                 goto nla_put_failure;
12464
12465         genlmsg_end(msg, hdr);
12466
12467         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12468                                 NL80211_MCGRP_MLME, gfp);
12469         return;
12470
12471  nla_put_failure:
12472         genlmsg_cancel(msg, hdr);
12473         nlmsg_free(msg);
12474 }
12475
12476 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12477                                     struct ieee80211_channel *channel_before,
12478                                     struct ieee80211_channel *channel_after)
12479 {
12480         struct sk_buff *msg;
12481         void *hdr;
12482         struct nlattr *nl_freq;
12483
12484         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12485         if (!msg)
12486                 return;
12487
12488         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12489         if (!hdr) {
12490                 nlmsg_free(msg);
12491                 return;
12492         }
12493
12494         /*
12495          * Since we are applying the beacon hint to a wiphy we know its
12496          * wiphy_idx is valid
12497          */
12498         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12499                 goto nla_put_failure;
12500
12501         /* Before */
12502         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12503         if (!nl_freq)
12504                 goto nla_put_failure;
12505         if (nl80211_msg_put_channel(msg, channel_before, false))
12506                 goto nla_put_failure;
12507         nla_nest_end(msg, nl_freq);
12508
12509         /* After */
12510         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12511         if (!nl_freq)
12512                 goto nla_put_failure;
12513         if (nl80211_msg_put_channel(msg, channel_after, false))
12514                 goto nla_put_failure;
12515         nla_nest_end(msg, nl_freq);
12516
12517         genlmsg_end(msg, hdr);
12518
12519         rcu_read_lock();
12520         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12521                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12522         rcu_read_unlock();
12523
12524         return;
12525
12526 nla_put_failure:
12527         genlmsg_cancel(msg, hdr);
12528         nlmsg_free(msg);
12529 }
12530
12531 static void nl80211_send_remain_on_chan_event(
12532         int cmd, struct cfg80211_registered_device *rdev,
12533         struct wireless_dev *wdev, u64 cookie,
12534         struct ieee80211_channel *chan,
12535         unsigned int duration, gfp_t gfp)
12536 {
12537         struct sk_buff *msg;
12538         void *hdr;
12539
12540         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12541         if (!msg)
12542                 return;
12543
12544         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12545         if (!hdr) {
12546                 nlmsg_free(msg);
12547                 return;
12548         }
12549
12550         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12551             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12552                                          wdev->netdev->ifindex)) ||
12553             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12554                               NL80211_ATTR_PAD) ||
12555             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12556             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12557                         NL80211_CHAN_NO_HT) ||
12558             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12559                               NL80211_ATTR_PAD))
12560                 goto nla_put_failure;
12561
12562         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12563             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12564                 goto nla_put_failure;
12565
12566         genlmsg_end(msg, hdr);
12567
12568         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12569                                 NL80211_MCGRP_MLME, gfp);
12570         return;
12571
12572  nla_put_failure:
12573         genlmsg_cancel(msg, hdr);
12574         nlmsg_free(msg);
12575 }
12576
12577 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12578                                struct ieee80211_channel *chan,
12579                                unsigned int duration, gfp_t gfp)
12580 {
12581         struct wiphy *wiphy = wdev->wiphy;
12582         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12583
12584         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12585         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12586                                           rdev, wdev, cookie, chan,
12587                                           duration, gfp);
12588 }
12589 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12590
12591 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12592                                         struct ieee80211_channel *chan,
12593                                         gfp_t gfp)
12594 {
12595         struct wiphy *wiphy = wdev->wiphy;
12596         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12597
12598         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12599         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12600                                           rdev, wdev, cookie, chan, 0, gfp);
12601 }
12602 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12603
12604 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12605                       struct station_info *sinfo, gfp_t gfp)
12606 {
12607         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12608         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12609         struct sk_buff *msg;
12610
12611         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12612
12613         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12614         if (!msg)
12615                 return;
12616
12617         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12618                                  rdev, dev, mac_addr, sinfo) < 0) {
12619                 nlmsg_free(msg);
12620                 return;
12621         }
12622
12623         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12624                                 NL80211_MCGRP_MLME, gfp);
12625 }
12626 EXPORT_SYMBOL(cfg80211_new_sta);
12627
12628 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12629                             struct station_info *sinfo, gfp_t gfp)
12630 {
12631         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12632         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12633         struct sk_buff *msg;
12634         struct station_info empty_sinfo = {};
12635
12636         if (!sinfo)
12637                 sinfo = &empty_sinfo;
12638
12639         trace_cfg80211_del_sta(dev, mac_addr);
12640
12641         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12642         if (!msg)
12643                 return;
12644
12645         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12646                                  rdev, dev, mac_addr, sinfo) < 0) {
12647                 nlmsg_free(msg);
12648                 return;
12649         }
12650
12651         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12652                                 NL80211_MCGRP_MLME, gfp);
12653 }
12654 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12655
12656 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12657                           enum nl80211_connect_failed_reason reason,
12658                           gfp_t gfp)
12659 {
12660         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12661         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12662         struct sk_buff *msg;
12663         void *hdr;
12664
12665         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12666         if (!msg)
12667                 return;
12668
12669         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12670         if (!hdr) {
12671                 nlmsg_free(msg);
12672                 return;
12673         }
12674
12675         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12676             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12677             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12678                 goto nla_put_failure;
12679
12680         genlmsg_end(msg, hdr);
12681
12682         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12683                                 NL80211_MCGRP_MLME, gfp);
12684         return;
12685
12686  nla_put_failure:
12687         genlmsg_cancel(msg, hdr);
12688         nlmsg_free(msg);
12689 }
12690 EXPORT_SYMBOL(cfg80211_conn_failed);
12691
12692 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12693                                        const u8 *addr, gfp_t gfp)
12694 {
12695         struct wireless_dev *wdev = dev->ieee80211_ptr;
12696         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12697         struct sk_buff *msg;
12698         void *hdr;
12699         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12700
12701         if (!nlportid)
12702                 return false;
12703
12704         msg = nlmsg_new(100, gfp);
12705         if (!msg)
12706                 return true;
12707
12708         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12709         if (!hdr) {
12710                 nlmsg_free(msg);
12711                 return true;
12712         }
12713
12714         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12715             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12716             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12717                 goto nla_put_failure;
12718
12719         genlmsg_end(msg, hdr);
12720         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12721         return true;
12722
12723  nla_put_failure:
12724         genlmsg_cancel(msg, hdr);
12725         nlmsg_free(msg);
12726         return true;
12727 }
12728
12729 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12730                                 const u8 *addr, gfp_t gfp)
12731 {
12732         struct wireless_dev *wdev = dev->ieee80211_ptr;
12733         bool ret;
12734
12735         trace_cfg80211_rx_spurious_frame(dev, addr);
12736
12737         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12738                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12739                 trace_cfg80211_return_bool(false);
12740                 return false;
12741         }
12742         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12743                                          addr, gfp);
12744         trace_cfg80211_return_bool(ret);
12745         return ret;
12746 }
12747 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12748
12749 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12750                                         const u8 *addr, gfp_t gfp)
12751 {
12752         struct wireless_dev *wdev = dev->ieee80211_ptr;
12753         bool ret;
12754
12755         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12756
12757         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12758                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12759                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12760                 trace_cfg80211_return_bool(false);
12761                 return false;
12762         }
12763         ret = __nl80211_unexpected_frame(dev,
12764                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12765                                          addr, gfp);
12766         trace_cfg80211_return_bool(ret);
12767         return ret;
12768 }
12769 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12770
12771 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12772                       struct wireless_dev *wdev, u32 nlportid,
12773                       int freq, int sig_dbm,
12774                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12775 {
12776         struct net_device *netdev = wdev->netdev;
12777         struct sk_buff *msg;
12778         void *hdr;
12779
12780         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12781         if (!msg)
12782                 return -ENOMEM;
12783
12784         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12785         if (!hdr) {
12786                 nlmsg_free(msg);
12787                 return -ENOMEM;
12788         }
12789
12790         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12791             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12792                                         netdev->ifindex)) ||
12793             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12794                               NL80211_ATTR_PAD) ||
12795             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12796             (sig_dbm &&
12797              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12798             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12799             (flags &&
12800              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12801                 goto nla_put_failure;
12802
12803         genlmsg_end(msg, hdr);
12804
12805         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12806
12807  nla_put_failure:
12808         genlmsg_cancel(msg, hdr);
12809         nlmsg_free(msg);
12810         return -ENOBUFS;
12811 }
12812
12813 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12814                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12815 {
12816         struct wiphy *wiphy = wdev->wiphy;
12817         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12818         struct net_device *netdev = wdev->netdev;
12819         struct sk_buff *msg;
12820         void *hdr;
12821
12822         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12823
12824         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12825         if (!msg)
12826                 return;
12827
12828         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12829         if (!hdr) {
12830                 nlmsg_free(msg);
12831                 return;
12832         }
12833
12834         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12835             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12836                                    netdev->ifindex)) ||
12837             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12838                               NL80211_ATTR_PAD) ||
12839             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12840             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12841                               NL80211_ATTR_PAD) ||
12842             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12843                 goto nla_put_failure;
12844
12845         genlmsg_end(msg, hdr);
12846
12847         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12848                                 NL80211_MCGRP_MLME, gfp);
12849         return;
12850
12851  nla_put_failure:
12852         genlmsg_cancel(msg, hdr);
12853         nlmsg_free(msg);
12854 }
12855 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12856
12857 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12858                                             const char *mac, gfp_t gfp)
12859 {
12860         struct wireless_dev *wdev = dev->ieee80211_ptr;
12861         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12862         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12863         void **cb;
12864
12865         if (!msg)
12866                 return NULL;
12867
12868         cb = (void **)msg->cb;
12869
12870         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12871         if (!cb[0]) {
12872                 nlmsg_free(msg);
12873                 return NULL;
12874         }
12875
12876         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12877             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12878                 goto nla_put_failure;
12879
12880         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12881                 goto nla_put_failure;
12882
12883         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12884         if (!cb[1])
12885                 goto nla_put_failure;
12886
12887         cb[2] = rdev;
12888
12889         return msg;
12890  nla_put_failure:
12891         nlmsg_free(msg);
12892         return NULL;
12893 }
12894
12895 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12896 {
12897         void **cb = (void **)msg->cb;
12898         struct cfg80211_registered_device *rdev = cb[2];
12899
12900         nla_nest_end(msg, cb[1]);
12901         genlmsg_end(msg, cb[0]);
12902
12903         memset(msg->cb, 0, sizeof(msg->cb));
12904
12905         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12906                                 NL80211_MCGRP_MLME, gfp);
12907 }
12908
12909 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12910                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12911                               gfp_t gfp)
12912 {
12913         struct sk_buff *msg;
12914
12915         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12916
12917         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12918                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12919                 return;
12920
12921         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12922         if (!msg)
12923                 return;
12924
12925         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12926                         rssi_event))
12927                 goto nla_put_failure;
12928
12929         cfg80211_send_cqm(msg, gfp);
12930
12931         return;
12932
12933  nla_put_failure:
12934         nlmsg_free(msg);
12935 }
12936 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12937
12938 void cfg80211_cqm_txe_notify(struct net_device *dev,
12939                              const u8 *peer, u32 num_packets,
12940                              u32 rate, u32 intvl, gfp_t gfp)
12941 {
12942         struct sk_buff *msg;
12943
12944         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12945         if (!msg)
12946                 return;
12947
12948         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12949                 goto nla_put_failure;
12950
12951         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12952                 goto nla_put_failure;
12953
12954         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12955                 goto nla_put_failure;
12956
12957         cfg80211_send_cqm(msg, gfp);
12958         return;
12959
12960  nla_put_failure:
12961         nlmsg_free(msg);
12962 }
12963 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12964
12965 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12966                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12967 {
12968         struct sk_buff *msg;
12969
12970         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12971
12972         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12973         if (!msg)
12974                 return;
12975
12976         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12977                 goto nla_put_failure;
12978
12979         cfg80211_send_cqm(msg, gfp);
12980         return;
12981
12982  nla_put_failure:
12983         nlmsg_free(msg);
12984 }
12985 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12986
12987 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12988 {
12989         struct sk_buff *msg;
12990
12991         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12992         if (!msg)
12993                 return;
12994
12995         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12996                 goto nla_put_failure;
12997
12998         cfg80211_send_cqm(msg, gfp);
12999         return;
13000
13001  nla_put_failure:
13002         nlmsg_free(msg);
13003 }
13004 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
13005
13006 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
13007                                      struct net_device *netdev, const u8 *bssid,
13008                                      const u8 *replay_ctr, gfp_t gfp)
13009 {
13010         struct sk_buff *msg;
13011         struct nlattr *rekey_attr;
13012         void *hdr;
13013
13014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13015         if (!msg)
13016                 return;
13017
13018         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
13019         if (!hdr) {
13020                 nlmsg_free(msg);
13021                 return;
13022         }
13023
13024         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13025             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13026             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13027                 goto nla_put_failure;
13028
13029         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
13030         if (!rekey_attr)
13031                 goto nla_put_failure;
13032
13033         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
13034                     NL80211_REPLAY_CTR_LEN, replay_ctr))
13035                 goto nla_put_failure;
13036
13037         nla_nest_end(msg, rekey_attr);
13038
13039         genlmsg_end(msg, hdr);
13040
13041         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13042                                 NL80211_MCGRP_MLME, gfp);
13043         return;
13044
13045  nla_put_failure:
13046         genlmsg_cancel(msg, hdr);
13047         nlmsg_free(msg);
13048 }
13049
13050 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
13051                                const u8 *replay_ctr, gfp_t gfp)
13052 {
13053         struct wireless_dev *wdev = dev->ieee80211_ptr;
13054         struct wiphy *wiphy = wdev->wiphy;
13055         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13056
13057         trace_cfg80211_gtk_rekey_notify(dev, bssid);
13058         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
13059 }
13060 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
13061
13062 static void
13063 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
13064                                struct net_device *netdev, int index,
13065                                const u8 *bssid, bool preauth, gfp_t gfp)
13066 {
13067         struct sk_buff *msg;
13068         struct nlattr *attr;
13069         void *hdr;
13070
13071         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13072         if (!msg)
13073                 return;
13074
13075         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
13076         if (!hdr) {
13077                 nlmsg_free(msg);
13078                 return;
13079         }
13080
13081         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13082             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13083                 goto nla_put_failure;
13084
13085         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
13086         if (!attr)
13087                 goto nla_put_failure;
13088
13089         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
13090             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
13091             (preauth &&
13092              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
13093                 goto nla_put_failure;
13094
13095         nla_nest_end(msg, attr);
13096
13097         genlmsg_end(msg, hdr);
13098
13099         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13100                                 NL80211_MCGRP_MLME, gfp);
13101         return;
13102
13103  nla_put_failure:
13104         genlmsg_cancel(msg, hdr);
13105         nlmsg_free(msg);
13106 }
13107
13108 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
13109                                      const u8 *bssid, bool preauth, gfp_t gfp)
13110 {
13111         struct wireless_dev *wdev = dev->ieee80211_ptr;
13112         struct wiphy *wiphy = wdev->wiphy;
13113         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13114
13115         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
13116         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
13117 }
13118 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
13119
13120 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
13121                                      struct net_device *netdev,
13122                                      struct cfg80211_chan_def *chandef,
13123                                      gfp_t gfp,
13124                                      enum nl80211_commands notif,
13125                                      u8 count)
13126 {
13127         struct sk_buff *msg;
13128         void *hdr;
13129
13130         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13131         if (!msg)
13132                 return;
13133
13134         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
13135         if (!hdr) {
13136                 nlmsg_free(msg);
13137                 return;
13138         }
13139
13140         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13141                 goto nla_put_failure;
13142
13143         if (nl80211_send_chandef(msg, chandef))
13144                 goto nla_put_failure;
13145
13146         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
13147             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
13148                         goto nla_put_failure;
13149
13150         genlmsg_end(msg, hdr);
13151
13152         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13153                                 NL80211_MCGRP_MLME, gfp);
13154         return;
13155
13156  nla_put_failure:
13157         genlmsg_cancel(msg, hdr);
13158         nlmsg_free(msg);
13159 }
13160
13161 void cfg80211_ch_switch_notify(struct net_device *dev,
13162                                struct cfg80211_chan_def *chandef)
13163 {
13164         struct wireless_dev *wdev = dev->ieee80211_ptr;
13165         struct wiphy *wiphy = wdev->wiphy;
13166         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13167
13168         ASSERT_WDEV_LOCK(wdev);
13169
13170         trace_cfg80211_ch_switch_notify(dev, chandef);
13171
13172         wdev->chandef = *chandef;
13173         wdev->preset_chandef = *chandef;
13174         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13175                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13176 }
13177 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13178
13179 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13180                                        struct cfg80211_chan_def *chandef,
13181                                        u8 count)
13182 {
13183         struct wireless_dev *wdev = dev->ieee80211_ptr;
13184         struct wiphy *wiphy = wdev->wiphy;
13185         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13186
13187         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13188
13189         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13190                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13191 }
13192 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13193
13194 void
13195 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13196                      const struct cfg80211_chan_def *chandef,
13197                      enum nl80211_radar_event event,
13198                      struct net_device *netdev, gfp_t gfp)
13199 {
13200         struct sk_buff *msg;
13201         void *hdr;
13202
13203         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13204         if (!msg)
13205                 return;
13206
13207         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13208         if (!hdr) {
13209                 nlmsg_free(msg);
13210                 return;
13211         }
13212
13213         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13214                 goto nla_put_failure;
13215
13216         /* NOP and radar events don't need a netdev parameter */
13217         if (netdev) {
13218                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13219
13220                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13221                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13222                                       NL80211_ATTR_PAD))
13223                         goto nla_put_failure;
13224         }
13225
13226         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13227                 goto nla_put_failure;
13228
13229         if (nl80211_send_chandef(msg, chandef))
13230                 goto nla_put_failure;
13231
13232         genlmsg_end(msg, hdr);
13233
13234         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13235                                 NL80211_MCGRP_MLME, gfp);
13236         return;
13237
13238  nla_put_failure:
13239         genlmsg_cancel(msg, hdr);
13240         nlmsg_free(msg);
13241 }
13242
13243 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13244                            u64 cookie, bool acked, gfp_t gfp)
13245 {
13246         struct wireless_dev *wdev = dev->ieee80211_ptr;
13247         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13248         struct sk_buff *msg;
13249         void *hdr;
13250
13251         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13252
13253         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13254
13255         if (!msg)
13256                 return;
13257
13258         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13259         if (!hdr) {
13260                 nlmsg_free(msg);
13261                 return;
13262         }
13263
13264         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13265             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13266             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13267             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13268                               NL80211_ATTR_PAD) ||
13269             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13270                 goto nla_put_failure;
13271
13272         genlmsg_end(msg, hdr);
13273
13274         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13275                                 NL80211_MCGRP_MLME, gfp);
13276         return;
13277
13278  nla_put_failure:
13279         genlmsg_cancel(msg, hdr);
13280         nlmsg_free(msg);
13281 }
13282 EXPORT_SYMBOL(cfg80211_probe_status);
13283
13284 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13285                                  const u8 *frame, size_t len,
13286                                  int freq, int sig_dbm)
13287 {
13288         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13289         struct sk_buff *msg;
13290         void *hdr;
13291         struct cfg80211_beacon_registration *reg;
13292
13293         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13294
13295         spin_lock_bh(&rdev->beacon_registrations_lock);
13296         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13297                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13298                 if (!msg) {
13299                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13300                         return;
13301                 }
13302
13303                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13304                 if (!hdr)
13305                         goto nla_put_failure;
13306
13307                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13308                     (freq &&
13309                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13310                     (sig_dbm &&
13311                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13312                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13313                         goto nla_put_failure;
13314
13315                 genlmsg_end(msg, hdr);
13316
13317                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13318         }
13319         spin_unlock_bh(&rdev->beacon_registrations_lock);
13320         return;
13321
13322  nla_put_failure:
13323         spin_unlock_bh(&rdev->beacon_registrations_lock);
13324         if (hdr)
13325                 genlmsg_cancel(msg, hdr);
13326         nlmsg_free(msg);
13327 }
13328 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13329
13330 #ifdef CONFIG_PM
13331 static int cfg80211_net_detect_results(struct sk_buff *msg,
13332                                        struct cfg80211_wowlan_wakeup *wakeup)
13333 {
13334         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13335         struct nlattr *nl_results, *nl_match, *nl_freqs;
13336         int i, j;
13337
13338         nl_results = nla_nest_start(
13339                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13340         if (!nl_results)
13341                 return -EMSGSIZE;
13342
13343         for (i = 0; i < nd->n_matches; i++) {
13344                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13345
13346                 nl_match = nla_nest_start(msg, i);
13347                 if (!nl_match)
13348                         break;
13349
13350                 /* The SSID attribute is optional in nl80211, but for
13351                  * simplicity reasons it's always present in the
13352                  * cfg80211 structure.  If a driver can't pass the
13353                  * SSID, that needs to be changed.  A zero length SSID
13354                  * is still a valid SSID (wildcard), so it cannot be
13355                  * used for this purpose.
13356                  */
13357                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13358                             match->ssid.ssid)) {
13359                         nla_nest_cancel(msg, nl_match);
13360                         goto out;
13361                 }
13362
13363                 if (match->n_channels) {
13364                         nl_freqs = nla_nest_start(
13365                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13366                         if (!nl_freqs) {
13367                                 nla_nest_cancel(msg, nl_match);
13368                                 goto out;
13369                         }
13370
13371                         for (j = 0; j < match->n_channels; j++) {
13372                                 if (nla_put_u32(msg, j, match->channels[j])) {
13373                                         nla_nest_cancel(msg, nl_freqs);
13374                                         nla_nest_cancel(msg, nl_match);
13375                                         goto out;
13376                                 }
13377                         }
13378
13379                         nla_nest_end(msg, nl_freqs);
13380                 }
13381
13382                 nla_nest_end(msg, nl_match);
13383         }
13384
13385 out:
13386         nla_nest_end(msg, nl_results);
13387         return 0;
13388 }
13389
13390 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13391                                    struct cfg80211_wowlan_wakeup *wakeup,
13392                                    gfp_t gfp)
13393 {
13394         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13395         struct sk_buff *msg;
13396         void *hdr;
13397         int size = 200;
13398
13399         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13400
13401         if (wakeup)
13402                 size += wakeup->packet_present_len;
13403
13404         msg = nlmsg_new(size, gfp);
13405         if (!msg)
13406                 return;
13407
13408         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13409         if (!hdr)
13410                 goto free_msg;
13411
13412         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13413             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13414                               NL80211_ATTR_PAD))
13415                 goto free_msg;
13416
13417         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13418                                         wdev->netdev->ifindex))
13419                 goto free_msg;
13420
13421         if (wakeup) {
13422                 struct nlattr *reasons;
13423
13424                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13425                 if (!reasons)
13426                         goto free_msg;
13427
13428                 if (wakeup->disconnect &&
13429                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13430                         goto free_msg;
13431                 if (wakeup->magic_pkt &&
13432                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13433                         goto free_msg;
13434                 if (wakeup->gtk_rekey_failure &&
13435                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13436                         goto free_msg;
13437                 if (wakeup->eap_identity_req &&
13438                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13439                         goto free_msg;
13440                 if (wakeup->four_way_handshake &&
13441                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13442                         goto free_msg;
13443                 if (wakeup->rfkill_release &&
13444                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13445                         goto free_msg;
13446
13447                 if (wakeup->pattern_idx >= 0 &&
13448                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13449                                 wakeup->pattern_idx))
13450                         goto free_msg;
13451
13452                 if (wakeup->tcp_match &&
13453                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13454                         goto free_msg;
13455
13456                 if (wakeup->tcp_connlost &&
13457                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13458                         goto free_msg;
13459
13460                 if (wakeup->tcp_nomoretokens &&
13461                     nla_put_flag(msg,
13462                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13463                         goto free_msg;
13464
13465                 if (wakeup->packet) {
13466                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13467                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13468
13469                         if (!wakeup->packet_80211) {
13470                                 pkt_attr =
13471                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13472                                 len_attr =
13473                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13474                         }
13475
13476                         if (wakeup->packet_len &&
13477                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13478                                 goto free_msg;
13479
13480                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13481                                     wakeup->packet))
13482                                 goto free_msg;
13483                 }
13484
13485                 if (wakeup->net_detect &&
13486                     cfg80211_net_detect_results(msg, wakeup))
13487                                 goto free_msg;
13488
13489                 nla_nest_end(msg, reasons);
13490         }
13491
13492         genlmsg_end(msg, hdr);
13493
13494         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13495                                 NL80211_MCGRP_MLME, gfp);
13496         return;
13497
13498  free_msg:
13499         nlmsg_free(msg);
13500 }
13501 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13502 #endif
13503
13504 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13505                                 enum nl80211_tdls_operation oper,
13506                                 u16 reason_code, gfp_t gfp)
13507 {
13508         struct wireless_dev *wdev = dev->ieee80211_ptr;
13509         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13510         struct sk_buff *msg;
13511         void *hdr;
13512
13513         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13514                                          reason_code);
13515
13516         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13517         if (!msg)
13518                 return;
13519
13520         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13521         if (!hdr) {
13522                 nlmsg_free(msg);
13523                 return;
13524         }
13525
13526         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13527             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13528             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13529             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13530             (reason_code > 0 &&
13531              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13532                 goto nla_put_failure;
13533
13534         genlmsg_end(msg, hdr);
13535
13536         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13537                                 NL80211_MCGRP_MLME, gfp);
13538         return;
13539
13540  nla_put_failure:
13541         genlmsg_cancel(msg, hdr);
13542         nlmsg_free(msg);
13543 }
13544 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13545
13546 static int nl80211_netlink_notify(struct notifier_block * nb,
13547                                   unsigned long state,
13548                                   void *_notify)
13549 {
13550         struct netlink_notify *notify = _notify;
13551         struct cfg80211_registered_device *rdev;
13552         struct wireless_dev *wdev;
13553         struct cfg80211_beacon_registration *reg, *tmp;
13554
13555         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13556                 return NOTIFY_DONE;
13557
13558         rcu_read_lock();
13559
13560         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13561                 bool schedule_destroy_work = false;
13562                 bool schedule_scan_stop = false;
13563                 struct cfg80211_sched_scan_request *sched_scan_req =
13564                         rcu_dereference(rdev->sched_scan_req);
13565
13566                 if (sched_scan_req && notify->portid &&
13567                     sched_scan_req->owner_nlportid == notify->portid)
13568                         schedule_scan_stop = true;
13569
13570                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
13571                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13572
13573                         if (wdev->owner_nlportid == notify->portid)
13574                                 schedule_destroy_work = true;
13575                 }
13576
13577                 spin_lock_bh(&rdev->beacon_registrations_lock);
13578                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13579                                          list) {
13580                         if (reg->nlportid == notify->portid) {
13581                                 list_del(&reg->list);
13582                                 kfree(reg);
13583                                 break;
13584                         }
13585                 }
13586                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13587
13588                 if (schedule_destroy_work) {
13589                         struct cfg80211_iface_destroy *destroy;
13590
13591                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13592                         if (destroy) {
13593                                 destroy->nlportid = notify->portid;
13594                                 spin_lock(&rdev->destroy_list_lock);
13595                                 list_add(&destroy->list, &rdev->destroy_list);
13596                                 spin_unlock(&rdev->destroy_list_lock);
13597                                 schedule_work(&rdev->destroy_work);
13598                         }
13599                 } else if (schedule_scan_stop) {
13600                         sched_scan_req->owner_nlportid = 0;
13601
13602                         if (rdev->ops->sched_scan_stop &&
13603                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13604                                 schedule_work(&rdev->sched_scan_stop_wk);
13605                 }
13606         }
13607
13608         rcu_read_unlock();
13609
13610         /*
13611          * It is possible that the user space process that is controlling the
13612          * indoor setting disappeared, so notify the regulatory core.
13613          */
13614         regulatory_netlink_notify(notify->portid);
13615         return NOTIFY_OK;
13616 }
13617
13618 static struct notifier_block nl80211_netlink_notifier = {
13619         .notifier_call = nl80211_netlink_notify,
13620 };
13621
13622 void cfg80211_ft_event(struct net_device *netdev,
13623                        struct cfg80211_ft_event_params *ft_event)
13624 {
13625         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13626         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13627         struct sk_buff *msg;
13628         void *hdr;
13629
13630         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13631
13632         if (!ft_event->target_ap)
13633                 return;
13634
13635         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13636         if (!msg)
13637                 return;
13638
13639         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13640         if (!hdr)
13641                 goto out;
13642
13643         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13644             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13645             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13646                 goto out;
13647
13648         if (ft_event->ies &&
13649             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13650                 goto out;
13651         if (ft_event->ric_ies &&
13652             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13653                     ft_event->ric_ies))
13654                 goto out;
13655
13656         genlmsg_end(msg, hdr);
13657
13658         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13659                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13660         return;
13661  out:
13662         nlmsg_free(msg);
13663 }
13664 EXPORT_SYMBOL(cfg80211_ft_event);
13665
13666 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13667 {
13668         struct cfg80211_registered_device *rdev;
13669         struct sk_buff *msg;
13670         void *hdr;
13671         u32 nlportid;
13672
13673         rdev = wiphy_to_rdev(wdev->wiphy);
13674         if (!rdev->crit_proto_nlportid)
13675                 return;
13676
13677         nlportid = rdev->crit_proto_nlportid;
13678         rdev->crit_proto_nlportid = 0;
13679
13680         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13681         if (!msg)
13682                 return;
13683
13684         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13685         if (!hdr)
13686                 goto nla_put_failure;
13687
13688         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13689             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13690                               NL80211_ATTR_PAD))
13691                 goto nla_put_failure;
13692
13693         genlmsg_end(msg, hdr);
13694
13695         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13696         return;
13697
13698  nla_put_failure:
13699         if (hdr)
13700                 genlmsg_cancel(msg, hdr);
13701         nlmsg_free(msg);
13702 }
13703 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13704
13705 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13706 {
13707         struct wiphy *wiphy = wdev->wiphy;
13708         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13709         struct sk_buff *msg;
13710         void *hdr;
13711
13712         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13713         if (!msg)
13714                 return;
13715
13716         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13717         if (!hdr)
13718                 goto out;
13719
13720         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13721             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13722             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13723                               NL80211_ATTR_PAD))
13724                 goto out;
13725
13726         genlmsg_end(msg, hdr);
13727
13728         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13729                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13730         return;
13731  out:
13732         nlmsg_free(msg);
13733 }
13734
13735 /* initialisation/exit functions */
13736
13737 int nl80211_init(void)
13738 {
13739         int err;
13740
13741         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13742                                                    nl80211_mcgrps);
13743         if (err)
13744                 return err;
13745
13746         err = netlink_register_notifier(&nl80211_netlink_notifier);
13747         if (err)
13748                 goto err_out;
13749
13750         return 0;
13751  err_out:
13752         genl_unregister_family(&nl80211_fam);
13753         return err;
13754 }
13755
13756 void nl80211_exit(void)
13757 {
13758         netlink_unregister_notifier(&nl80211_netlink_notifier);
13759         genl_unregister_family(&nl80211_fam);
13760 }