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         bool have_key = false;
 852
 853         nla_for_each_nested(key, keys, rem) {
 854                 have_key = true;
 855                 break;
 856         }
 857
 858         if (!have_key)
 859                 return NULL;
 860
 861         result = kzalloc(sizeof(*result), GFP_KERNEL);
 862         if (!result)
 863                 return ERR_PTR(-ENOMEM);
 864
 865         result->def = -1;
 866
 867         nla_for_each_nested(key, keys, rem) {
 868                 memset(&parse, 0, sizeof(parse));
 869                 parse.idx = -1;
 870
 871                 err = nl80211_parse_key_new(key, &parse);
 872                 if (err)
 873                         goto error;
 874                 err = -EINVAL;
 875                 if (!parse.p.key)
 876                         goto error;
 877                 if (parse.idx < 0 || parse.idx > 3)
 878                         goto error;
 879                 if (parse.def) {
 880                         if (def)
 881                                 goto error;
 882                         def = 1;
 883                         result->def = parse.idx;
 884                         if (!parse.def_uni || !parse.def_multi)
 885                                 goto error;
 886                 } else if (parse.defmgmt)
 887                         goto error;
 888                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 889                                                      parse.idx, false, NULL);
 890                 if (err)
 891                         goto error;
 892                 if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 893                     parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
 894                         err = -EINVAL;
 895                         goto error;
 896                 }
 897                 result->params[parse.idx].cipher = parse.p.cipher;
 898                 result->params[parse.idx].key_len = parse.p.key_len;
 899                 result->params[parse.idx].key = result->data[parse.idx];
 900                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 901
 902                 /* must be WEP key if we got here */
 903                 if (no_ht)
 904                         *no_ht = true;
 905         }
 906
 907         if (result->def < 0) {
 908                 err = -EINVAL;
 909                 goto error;
 910         }
 911
 912         return result;
 913  error:
 914         kfree(result);
 915         return ERR_PTR(err);
 916 }
 917
 918 static int nl80211_key_allowed(struct wireless_dev *wdev)
 919 {
 920         ASSERT_WDEV_LOCK(wdev);
 921
 922         switch (wdev->iftype) {
 923         case NL80211_IFTYPE_AP:
 924         case NL80211_IFTYPE_AP_VLAN:
 925         case NL80211_IFTYPE_P2P_GO:
 926         case NL80211_IFTYPE_MESH_POINT:
 927                 break;
 928         case NL80211_IFTYPE_ADHOC:
 929         case NL80211_IFTYPE_STATION:
 930         case NL80211_IFTYPE_P2P_CLIENT:
 931                 if (!wdev->current_bss)
 932                         return -ENOLINK;
 933                 break;
 934         case NL80211_IFTYPE_UNSPECIFIED:
 935         case NL80211_IFTYPE_OCB:
 936         case NL80211_IFTYPE_MONITOR:
 937         case NL80211_IFTYPE_P2P_DEVICE:
 938         case NL80211_IFTYPE_WDS:
 939         case NUM_NL80211_IFTYPES:
 940                 return -EINVAL;
 941         }
 942
 943         return 0;
 944 }
 945
 946 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 947                                                         struct nlattr *tb)
 948 {
 949         struct ieee80211_channel *chan;
 950
 951         if (tb == NULL)
 952                 return NULL;
 953         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 954         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 955                 return NULL;
 956         return chan;
 957 }
 958
 959 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 960 {
 961         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 962         int i;
 963
 964         if (!nl_modes)
 965                 goto nla_put_failure;
 966
 967         i = 0;
 968         while (ifmodes) {
 969                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 970                         goto nla_put_failure;
 971                 ifmodes >>= 1;
 972                 i++;
 973         }
 974
 975         nla_nest_end(msg, nl_modes);
 976         return 0;
 977
 978 nla_put_failure:
 979         return -ENOBUFS;
 980 }
 981
 982 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 983                                           struct sk_buff *msg,
 984                                           bool large)
 985 {
 986         struct nlattr *nl_combis;
 987         int i, j;
 988
 989         nl_combis = nla_nest_start(msg,
 990                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 991         if (!nl_combis)
 992                 goto nla_put_failure;
 993
 994         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 995                 const struct ieee80211_iface_combination *c;
 996                 struct nlattr *nl_combi, *nl_limits;
 997
 998                 c = &wiphy->iface_combinations[i];
 999
1000                 nl_combi = nla_nest_start(msg, i + 1);
1001                 if (!nl_combi)
1002                         goto nla_put_failure;
1003
1004                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
1005                 if (!nl_limits)
1006                         goto nla_put_failure;
1007
1008                 for (j = 0; j < c->n_limits; j++) {
1009                         struct nlattr *nl_limit;
1010
1011                         nl_limit = nla_nest_start(msg, j + 1);
1012                         if (!nl_limit)
1013                                 goto nla_put_failure;
1014                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1015                                         c->limits[j].max))
1016                                 goto nla_put_failure;
1017                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1018                                                 c->limits[j].types))
1019                                 goto nla_put_failure;
1020                         nla_nest_end(msg, nl_limit);
1021                 }
1022
1023                 nla_nest_end(msg, nl_limits);
1024
1025                 if (c->beacon_int_infra_match &&
1026                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1027                         goto nla_put_failure;
1028                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1029                                 c->num_different_channels) ||
1030                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1031                                 c->max_interfaces))
1032                         goto nla_put_failure;
1033                 if (large &&
1034                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1035                                 c->radar_detect_widths) ||
1036                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1037                                 c->radar_detect_regions)))
1038                         goto nla_put_failure;
1039
1040                 nla_nest_end(msg, nl_combi);
1041         }
1042
1043         nla_nest_end(msg, nl_combis);
1044
1045         return 0;
1046 nla_put_failure:
1047         return -ENOBUFS;
1048 }
1049
1050 #ifdef CONFIG_PM
1051 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1052                                         struct sk_buff *msg)
1053 {
1054         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1055         struct nlattr *nl_tcp;
1056
1057         if (!tcp)
1058                 return 0;
1059
1060         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1061         if (!nl_tcp)
1062                 return -ENOBUFS;
1063
1064         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1065                         tcp->data_payload_max))
1066                 return -ENOBUFS;
1067
1068         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1069                         tcp->data_payload_max))
1070                 return -ENOBUFS;
1071
1072         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1073                 return -ENOBUFS;
1074
1075         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1076                                 sizeof(*tcp->tok), tcp->tok))
1077                 return -ENOBUFS;
1078
1079         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1080                         tcp->data_interval_max))
1081                 return -ENOBUFS;
1082
1083         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1084                         tcp->wake_payload_max))
1085                 return -ENOBUFS;
1086
1087         nla_nest_end(msg, nl_tcp);
1088         return 0;
1089 }
1090
1091 static int nl80211_send_wowlan(struct sk_buff *msg,
1092                                struct cfg80211_registered_device *rdev,
1093                                bool large)
1094 {
1095         struct nlattr *nl_wowlan;
1096
1097         if (!rdev->wiphy.wowlan)
1098                 return 0;
1099
1100         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1101         if (!nl_wowlan)
1102                 return -ENOBUFS;
1103
1104         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1105              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1106             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1107              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1108             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1109              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1110             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1111              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1112             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1113              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1114             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1115              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1116             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1117              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1118             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1119              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1120                 return -ENOBUFS;
1121
1122         if (rdev->wiphy.wowlan->n_patterns) {
1123                 struct nl80211_pattern_support pat = {
1124                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1125                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1126                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1127                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1128                 };
1129
1130                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1131                             sizeof(pat), &pat))
1132                         return -ENOBUFS;
1133         }
1134
1135         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1136             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1137                         rdev->wiphy.wowlan->max_nd_match_sets))
1138                 return -ENOBUFS;
1139
1140         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1141                 return -ENOBUFS;
1142
1143         nla_nest_end(msg, nl_wowlan);
1144
1145         return 0;
1146 }
1147 #endif
1148
1149 static int nl80211_send_coalesce(struct sk_buff *msg,
1150                                  struct cfg80211_registered_device *rdev)
1151 {
1152         struct nl80211_coalesce_rule_support rule;
1153
1154         if (!rdev->wiphy.coalesce)
1155                 return 0;
1156
1157         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1158         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1159         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1160         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1161         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1162         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1163
1164         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1165                 return -ENOBUFS;
1166
1167         return 0;
1168 }
1169
1170 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1171                                       struct ieee80211_supported_band *sband)
1172 {
1173         struct nlattr *nl_rates, *nl_rate;
1174         struct ieee80211_rate *rate;
1175         int i;
1176
1177         /* add HT info */
1178         if (sband->ht_cap.ht_supported &&
1179             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1180                      sizeof(sband->ht_cap.mcs),
1181                      &sband->ht_cap.mcs) ||
1182              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1183                          sband->ht_cap.cap) ||
1184              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1185                         sband->ht_cap.ampdu_factor) ||
1186              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1187                         sband->ht_cap.ampdu_density)))
1188                 return -ENOBUFS;
1189
1190         /* add VHT info */
1191         if (sband->vht_cap.vht_supported &&
1192             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1193                      sizeof(sband->vht_cap.vht_mcs),
1194                      &sband->vht_cap.vht_mcs) ||
1195              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1196                          sband->vht_cap.cap)))
1197                 return -ENOBUFS;
1198
1199         /* add bitrates */
1200         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1201         if (!nl_rates)
1202                 return -ENOBUFS;
1203
1204         for (i = 0; i < sband->n_bitrates; i++) {
1205                 nl_rate = nla_nest_start(msg, i);
1206                 if (!nl_rate)
1207                         return -ENOBUFS;
1208
1209                 rate = &sband->bitrates[i];
1210                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1211                                 rate->bitrate))
1212                         return -ENOBUFS;
1213                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1214                     nla_put_flag(msg,
1215                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1216                         return -ENOBUFS;
1217
1218                 nla_nest_end(msg, nl_rate);
1219         }
1220
1221         nla_nest_end(msg, nl_rates);
1222
1223         return 0;
1224 }
1225
1226 static int
1227 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1228                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1229 {
1230         u16 stypes;
1231         struct nlattr *nl_ftypes, *nl_ifs;
1232         enum nl80211_iftype ift;
1233         int i;
1234
1235         if (!mgmt_stypes)
1236                 return 0;
1237
1238         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1239         if (!nl_ifs)
1240                 return -ENOBUFS;
1241
1242         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1243                 nl_ftypes = nla_nest_start(msg, ift);
1244                 if (!nl_ftypes)
1245                         return -ENOBUFS;
1246                 i = 0;
1247                 stypes = mgmt_stypes[ift].tx;
1248                 while (stypes) {
1249                         if ((stypes & 1) &&
1250                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1251                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1252                                 return -ENOBUFS;
1253                         stypes >>= 1;
1254                         i++;
1255                 }
1256                 nla_nest_end(msg, nl_ftypes);
1257         }
1258
1259         nla_nest_end(msg, nl_ifs);
1260
1261         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1262         if (!nl_ifs)
1263                 return -ENOBUFS;
1264
1265         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1266                 nl_ftypes = nla_nest_start(msg, ift);
1267                 if (!nl_ftypes)
1268                         return -ENOBUFS;
1269                 i = 0;
1270                 stypes = mgmt_stypes[ift].rx;
1271                 while (stypes) {
1272                         if ((stypes & 1) &&
1273                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1274                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1275                                 return -ENOBUFS;
1276                         stypes >>= 1;
1277                         i++;
1278                 }
1279                 nla_nest_end(msg, nl_ftypes);
1280         }
1281         nla_nest_end(msg, nl_ifs);
1282
1283         return 0;
1284 }
1285
1286 struct nl80211_dump_wiphy_state {
1287         s64 filter_wiphy;
1288         long start;
1289         long split_start, band_start, chan_start, capa_start;
1290         bool split;
1291 };
1292
1293 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1294                               enum nl80211_commands cmd,
1295                               struct sk_buff *msg, u32 portid, u32 seq,
1296                               int flags, struct nl80211_dump_wiphy_state *state)
1297 {
1298         void *hdr;
1299         struct nlattr *nl_bands, *nl_band;
1300         struct nlattr *nl_freqs, *nl_freq;
1301         struct nlattr *nl_cmds;
1302         enum nl80211_band band;
1303         struct ieee80211_channel *chan;
1304         int i;
1305         const struct ieee80211_txrx_stypes *mgmt_stypes =
1306                                 rdev->wiphy.mgmt_stypes;
1307         u32 features;
1308
1309         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1310         if (!hdr)
1311                 return -ENOBUFS;
1312
1313         if (WARN_ON(!state))
1314                 return -EINVAL;
1315
1316         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1317             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1318                            wiphy_name(&rdev->wiphy)) ||
1319             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1320                         cfg80211_rdev_list_generation))
1321                 goto nla_put_failure;
1322
1323         if (cmd != NL80211_CMD_NEW_WIPHY)
1324                 goto finish;
1325
1326         switch (state->split_start) {
1327         case 0:
1328                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1329                                rdev->wiphy.retry_short) ||
1330                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1331                                rdev->wiphy.retry_long) ||
1332                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1333                                 rdev->wiphy.frag_threshold) ||
1334                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1335                                 rdev->wiphy.rts_threshold) ||
1336                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1337                                rdev->wiphy.coverage_class) ||
1338                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1339                                rdev->wiphy.max_scan_ssids) ||
1340                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1341                                rdev->wiphy.max_sched_scan_ssids) ||
1342                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1343                                 rdev->wiphy.max_scan_ie_len) ||
1344                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1345                                 rdev->wiphy.max_sched_scan_ie_len) ||
1346                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1347                                rdev->wiphy.max_match_sets) ||
1348                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1349                                 rdev->wiphy.max_sched_scan_plans) ||
1350                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1351                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1352                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1353                                 rdev->wiphy.max_sched_scan_plan_iterations))
1354                         goto nla_put_failure;
1355
1356                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1357                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1358                         goto nla_put_failure;
1359                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1360                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1361                         goto nla_put_failure;
1362                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1363                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1364                         goto nla_put_failure;
1365                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1366                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1367                         goto nla_put_failure;
1368                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1369                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1370                         goto nla_put_failure;
1371                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1372                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1373                         goto nla_put_failure;
1374                 state->split_start++;
1375                 if (state->split)
1376                         break;
1377         case 1:
1378                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1379                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1380                             rdev->wiphy.cipher_suites))
1381                         goto nla_put_failure;
1382
1383                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1384                                rdev->wiphy.max_num_pmkids))
1385                         goto nla_put_failure;
1386
1387                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1388                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1389                         goto nla_put_failure;
1390
1391                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1392                                 rdev->wiphy.available_antennas_tx) ||
1393                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1394                                 rdev->wiphy.available_antennas_rx))
1395                         goto nla_put_failure;
1396
1397                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1398                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1399                                 rdev->wiphy.probe_resp_offload))
1400                         goto nla_put_failure;
1401
1402                 if ((rdev->wiphy.available_antennas_tx ||
1403                      rdev->wiphy.available_antennas_rx) &&
1404                     rdev->ops->get_antenna) {
1405                         u32 tx_ant = 0, rx_ant = 0;
1406                         int res;
1407
1408                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1409                         if (!res) {
1410                                 if (nla_put_u32(msg,
1411                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1412                                                 tx_ant) ||
1413                                     nla_put_u32(msg,
1414                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1415                                                 rx_ant))
1416                                         goto nla_put_failure;
1417                         }
1418                 }
1419
1420                 state->split_start++;
1421                 if (state->split)
1422                         break;
1423         case 2:
1424                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1425                                         rdev->wiphy.interface_modes))
1426                                 goto nla_put_failure;
1427                 state->split_start++;
1428                 if (state->split)
1429                         break;
1430         case 3:
1431                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1432                 if (!nl_bands)
1433                         goto nla_put_failure;
1434
1435                 for (band = state->band_start;
1436                      band < NUM_NL80211_BANDS; band++) {
1437                         struct ieee80211_supported_band *sband;
1438
1439                         sband = rdev->wiphy.bands[band];
1440
1441                         if (!sband)
1442                                 continue;
1443
1444                         nl_band = nla_nest_start(msg, band);
1445                         if (!nl_band)
1446                                 goto nla_put_failure;
1447
1448                         switch (state->chan_start) {
1449                         case 0:
1450                                 if (nl80211_send_band_rateinfo(msg, sband))
1451                                         goto nla_put_failure;
1452                                 state->chan_start++;
1453                                 if (state->split)
1454                                         break;
1455                         default:
1456                                 /* add frequencies */
1457                                 nl_freqs = nla_nest_start(
1458                                         msg, NL80211_BAND_ATTR_FREQS);
1459                                 if (!nl_freqs)
1460                                         goto nla_put_failure;
1461
1462                                 for (i = state->chan_start - 1;
1463                                      i < sband->n_channels;
1464                                      i++) {
1465                                         nl_freq = nla_nest_start(msg, i);
1466                                         if (!nl_freq)
1467                                                 goto nla_put_failure;
1468
1469                                         chan = &sband->channels[i];
1470
1471                                         if (nl80211_msg_put_channel(
1472                                                         msg, chan,
1473                                                         state->split))
1474                                                 goto nla_put_failure;
1475
1476                                         nla_nest_end(msg, nl_freq);
1477                                         if (state->split)
1478                                                 break;
1479                                 }
1480                                 if (i < sband->n_channels)
1481                                         state->chan_start = i + 2;
1482                                 else
1483                                         state->chan_start = 0;
1484                                 nla_nest_end(msg, nl_freqs);
1485                         }
1486
1487                         nla_nest_end(msg, nl_band);
1488
1489                         if (state->split) {
1490                                 /* start again here */
1491                                 if (state->chan_start)
1492                                         band--;
1493                                 break;
1494                         }
1495                 }
1496                 nla_nest_end(msg, nl_bands);
1497
1498                 if (band < NUM_NL80211_BANDS)
1499                         state->band_start = band + 1;
1500                 else
1501                         state->band_start = 0;
1502
1503                 /* if bands & channels are done, continue outside */
1504                 if (state->band_start == 0 && state->chan_start == 0)
1505                         state->split_start++;
1506                 if (state->split)
1507                         break;
1508         case 4:
1509                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1510                 if (!nl_cmds)
1511                         goto nla_put_failure;
1512
1513                 i = 0;
1514 #define CMD(op, n)                                                      \
1515                  do {                                                   \
1516                         if (rdev->ops->op) {                            \
1517                                 i++;                                    \
1518                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1519                                         goto nla_put_failure;           \
1520                         }                                               \
1521                 } while (0)
1522
1523                 CMD(add_virtual_intf, NEW_INTERFACE);
1524                 CMD(change_virtual_intf, SET_INTERFACE);
1525                 CMD(add_key, NEW_KEY);
1526                 CMD(start_ap, START_AP);
1527                 CMD(add_station, NEW_STATION);
1528                 CMD(add_mpath, NEW_MPATH);
1529                 CMD(update_mesh_config, SET_MESH_CONFIG);
1530                 CMD(change_bss, SET_BSS);
1531                 CMD(auth, AUTHENTICATE);
1532                 CMD(assoc, ASSOCIATE);
1533                 CMD(deauth, DEAUTHENTICATE);
1534                 CMD(disassoc, DISASSOCIATE);
1535                 CMD(join_ibss, JOIN_IBSS);
1536                 CMD(join_mesh, JOIN_MESH);
1537                 CMD(set_pmksa, SET_PMKSA);
1538                 CMD(del_pmksa, DEL_PMKSA);
1539                 CMD(flush_pmksa, FLUSH_PMKSA);
1540                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1541                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1542                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1543                 CMD(mgmt_tx, FRAME);
1544                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1545                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1546                         i++;
1547                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1548                                 goto nla_put_failure;
1549                 }
1550                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1551                     rdev->ops->join_mesh) {
1552                         i++;
1553                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1554                                 goto nla_put_failure;
1555                 }
1556                 CMD(set_wds_peer, SET_WDS_PEER);
1557                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1558                         CMD(tdls_mgmt, TDLS_MGMT);
1559                         CMD(tdls_oper, TDLS_OPER);
1560                 }
1561                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1562                         CMD(sched_scan_start, START_SCHED_SCAN);
1563                 CMD(probe_client, PROBE_CLIENT);
1564                 CMD(set_noack_map, SET_NOACK_MAP);
1565                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1566                         i++;
1567                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1568                                 goto nla_put_failure;
1569                 }
1570                 CMD(start_p2p_device, START_P2P_DEVICE);
1571                 CMD(set_mcast_rate, SET_MCAST_RATE);
1572 #ifdef CONFIG_NL80211_TESTMODE
1573                 CMD(testmode_cmd, TESTMODE);
1574 #endif
1575                 if (state->split) {
1576                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1577                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1578                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1579                                 CMD(channel_switch, CHANNEL_SWITCH);
1580                         CMD(set_qos_map, SET_QOS_MAP);
1581                         if (rdev->wiphy.features &
1582                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1583                                 CMD(add_tx_ts, ADD_TX_TS);
1584                 }
1585                 /* add into the if now */
1586 #undef CMD
1587
1588                 if (rdev->ops->connect || rdev->ops->auth) {
1589                         i++;
1590                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1591                                 goto nla_put_failure;
1592                 }
1593
1594                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1595                         i++;
1596                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1597                                 goto nla_put_failure;
1598                 }
1599
1600                 nla_nest_end(msg, nl_cmds);
1601                 state->split_start++;
1602                 if (state->split)
1603                         break;
1604         case 5:
1605                 if (rdev->ops->remain_on_channel &&
1606                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1607                     nla_put_u32(msg,
1608                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1609                                 rdev->wiphy.max_remain_on_channel_duration))
1610                         goto nla_put_failure;
1611
1612                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1613                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1614                         goto nla_put_failure;
1615
1616                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1617                         goto nla_put_failure;
1618                 state->split_start++;
1619                 if (state->split)
1620                         break;
1621         case 6:
1622 #ifdef CONFIG_PM
1623                 if (nl80211_send_wowlan(msg, rdev, state->split))
1624                         goto nla_put_failure;
1625                 state->split_start++;
1626                 if (state->split)
1627                         break;
1628 #else
1629                 state->split_start++;
1630 #endif
1631         case 7:
1632                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1633                                         rdev->wiphy.software_iftypes))
1634                         goto nla_put_failure;
1635
1636                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1637                                                    state->split))
1638                         goto nla_put_failure;
1639
1640                 state->split_start++;
1641                 if (state->split)
1642                         break;
1643         case 8:
1644                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1645                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1646                                 rdev->wiphy.ap_sme_capa))
1647                         goto nla_put_failure;
1648
1649                 features = rdev->wiphy.features;
1650                 /*
1651                  * We can only add the per-channel limit information if the
1652                  * dump is split, otherwise it makes it too big. Therefore
1653                  * only advertise it in that case.
1654                  */
1655                 if (state->split)
1656                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1657                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1658                         goto nla_put_failure;
1659
1660                 if (rdev->wiphy.ht_capa_mod_mask &&
1661                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1662                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1663                             rdev->wiphy.ht_capa_mod_mask))
1664                         goto nla_put_failure;
1665
1666                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1667                     rdev->wiphy.max_acl_mac_addrs &&
1668                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1669                                 rdev->wiphy.max_acl_mac_addrs))
1670                         goto nla_put_failure;
1671
1672                 /*
1673                  * Any information below this point is only available to
1674                  * applications that can deal with it being split. This
1675                  * helps ensure that newly added capabilities don't break
1676                  * older tools by overrunning their buffers.
1677                  *
1678                  * We still increment split_start so that in the split
1679                  * case we'll continue with more data in the next round,
1680                  * but break unconditionally so unsplit data stops here.
1681                  */
1682                 state->split_start++;
1683                 break;
1684         case 9:
1685                 if (rdev->wiphy.extended_capabilities &&
1686                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1687                              rdev->wiphy.extended_capabilities_len,
1688                              rdev->wiphy.extended_capabilities) ||
1689                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1690                              rdev->wiphy.extended_capabilities_len,
1691                              rdev->wiphy.extended_capabilities_mask)))
1692                         goto nla_put_failure;
1693
1694                 if (rdev->wiphy.vht_capa_mod_mask &&
1695                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1696                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1697                             rdev->wiphy.vht_capa_mod_mask))
1698                         goto nla_put_failure;
1699
1700                 state->split_start++;
1701                 break;
1702         case 10:
1703                 if (nl80211_send_coalesce(msg, rdev))
1704                         goto nla_put_failure;
1705
1706                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1707                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1708                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1709                         goto nla_put_failure;
1710
1711                 if (rdev->wiphy.max_ap_assoc_sta &&
1712                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1713                                 rdev->wiphy.max_ap_assoc_sta))
1714                         goto nla_put_failure;
1715
1716                 state->split_start++;
1717                 break;
1718         case 11:
1719                 if (rdev->wiphy.n_vendor_commands) {
1720                         const struct nl80211_vendor_cmd_info *info;
1721                         struct nlattr *nested;
1722
1723                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1724                         if (!nested)
1725                                 goto nla_put_failure;
1726
1727                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1728                                 info = &rdev->wiphy.vendor_commands[i].info;
1729                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1730                                         goto nla_put_failure;
1731                         }
1732                         nla_nest_end(msg, nested);
1733                 }
1734
1735                 if (rdev->wiphy.n_vendor_events) {
1736                         const struct nl80211_vendor_cmd_info *info;
1737                         struct nlattr *nested;
1738
1739                         nested = nla_nest_start(msg,
1740                                                 NL80211_ATTR_VENDOR_EVENTS);
1741                         if (!nested)
1742                                 goto nla_put_failure;
1743
1744                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1745                                 info = &rdev->wiphy.vendor_events[i];
1746                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1747                                         goto nla_put_failure;
1748                         }
1749                         nla_nest_end(msg, nested);
1750                 }
1751                 state->split_start++;
1752                 break;
1753         case 12:
1754                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1755                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1756                                rdev->wiphy.max_num_csa_counters))
1757                         goto nla_put_failure;
1758
1759                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1760                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1761                         goto nla_put_failure;
1762
1763                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1764                             sizeof(rdev->wiphy.ext_features),
1765                             rdev->wiphy.ext_features))
1766                         goto nla_put_failure;
1767
1768                 if (rdev->wiphy.bss_select_support) {
1769                         struct nlattr *nested;
1770                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1771
1772                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1773                         if (!nested)
1774                                 goto nla_put_failure;
1775
1776                         i = 0;
1777                         while (bss_select_support) {
1778                                 if ((bss_select_support & 1) &&
1779                                     nla_put_flag(msg, i))
1780                                         goto nla_put_failure;
1781                                 i++;
1782                                 bss_select_support >>= 1;
1783                         }
1784                         nla_nest_end(msg, nested);
1785                 }
1786
1787                 state->split_start++;
1788                 break;
1789         case 13:
1790                 if (rdev->wiphy.num_iftype_ext_capab &&
1791                     rdev->wiphy.iftype_ext_capab) {
1792                         struct nlattr *nested_ext_capab, *nested;
1793
1794                         nested = nla_nest_start(msg,
1795                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1796                         if (!nested)
1797                                 goto nla_put_failure;
1798
1799                         for (i = state->capa_start;
1800                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1801                                 const struct wiphy_iftype_ext_capab *capab;
1802
1803                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1804
1805                                 nested_ext_capab = nla_nest_start(msg, i);
1806                                 if (!nested_ext_capab ||
1807                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1808                                                 capab->iftype) ||
1809                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1810                                             capab->extended_capabilities_len,
1811                                             capab->extended_capabilities) ||
1812                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1813                                             capab->extended_capabilities_len,
1814                                             capab->extended_capabilities_mask))
1815                                         goto nla_put_failure;
1816
1817                                 nla_nest_end(msg, nested_ext_capab);
1818                                 if (state->split)
1819                                         break;
1820                         }
1821                         nla_nest_end(msg, nested);
1822                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1823                                 state->capa_start = i + 1;
1824                                 break;
1825                         }
1826                 }
1827
1828                 /* done */
1829                 state->split_start = 0;
1830                 break;
1831         }
1832  finish:
1833         genlmsg_end(msg, hdr);
1834         return 0;
1835
1836  nla_put_failure:
1837         genlmsg_cancel(msg, hdr);
1838         return -EMSGSIZE;
1839 }
1840
1841 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1842                                     struct netlink_callback *cb,
1843                                     struct nl80211_dump_wiphy_state *state)
1844 {
1845         struct nlattr **tb = nl80211_fam.attrbuf;
1846         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1847                               tb, nl80211_fam.maxattr, nl80211_policy);
1848         /* ignore parse errors for backward compatibility */
1849         if (ret)
1850                 return 0;
1851
1852         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1853         if (tb[NL80211_ATTR_WIPHY])
1854                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1855         if (tb[NL80211_ATTR_WDEV])
1856                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1857         if (tb[NL80211_ATTR_IFINDEX]) {
1858                 struct net_device *netdev;
1859                 struct cfg80211_registered_device *rdev;
1860                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1861
1862                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1863                 if (!netdev)
1864                         return -ENODEV;
1865                 if (netdev->ieee80211_ptr) {
1866                         rdev = wiphy_to_rdev(
1867                                 netdev->ieee80211_ptr->wiphy);
1868                         state->filter_wiphy = rdev->wiphy_idx;
1869                 }
1870         }
1871
1872         return 0;
1873 }
1874
1875 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1876 {
1877         int idx = 0, ret;
1878         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1879         struct cfg80211_registered_device *rdev;
1880
1881         rtnl_lock();
1882         if (!state) {
1883                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1884                 if (!state) {
1885                         rtnl_unlock();
1886                         return -ENOMEM;
1887                 }
1888                 state->filter_wiphy = -1;
1889                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1890                 if (ret) {
1891                         kfree(state);
1892                         rtnl_unlock();
1893                         return ret;
1894                 }
1895                 cb->args[0] = (long)state;
1896         }
1897
1898         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1899                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1900                         continue;
1901                 if (++idx <= state->start)
1902                         continue;
1903                 if (state->filter_wiphy != -1 &&
1904                     state->filter_wiphy != rdev->wiphy_idx)
1905                         continue;
1906                 /* attempt to fit multiple wiphy data chunks into the skb */
1907                 do {
1908                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1909                                                  skb,
1910                                                  NETLINK_CB(cb->skb).portid,
1911                                                  cb->nlh->nlmsg_seq,
1912                                                  NLM_F_MULTI, state);
1913                         if (ret < 0) {
1914                                 /*
1915                                  * If sending the wiphy data didn't fit (ENOBUFS
1916                                  * or EMSGSIZE returned), this SKB is still
1917                                  * empty (so it's not too big because another
1918                                  * wiphy dataset is already in the skb) and
1919                                  * we've not tried to adjust the dump allocation
1920                                  * yet ... then adjust the alloc size to be
1921                                  * bigger, and return 1 but with the empty skb.
1922                                  * This results in an empty message being RX'ed
1923                                  * in userspace, but that is ignored.
1924                                  *
1925                                  * We can then retry with the larger buffer.
1926                                  */
1927                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1928                                     !skb->len && !state->split &&
1929                                     cb->min_dump_alloc < 4096) {
1930                                         cb->min_dump_alloc = 4096;
1931                                         state->split_start = 0;
1932                                         rtnl_unlock();
1933                                         return 1;
1934                                 }
1935                                 idx--;
1936                                 break;
1937                         }
1938                 } while (state->split_start > 0);
1939                 break;
1940         }
1941         rtnl_unlock();
1942
1943         state->start = idx;
1944
1945         return skb->len;
1946 }
1947
1948 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1949 {
1950         kfree((void *)cb->args[0]);
1951         return 0;
1952 }
1953
1954 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1955 {
1956         struct sk_buff *msg;
1957         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1958         struct nl80211_dump_wiphy_state state = {};
1959
1960         msg = nlmsg_new(4096, GFP_KERNEL);
1961         if (!msg)
1962                 return -ENOMEM;
1963
1964         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1965                                info->snd_portid, info->snd_seq, 0,
1966                                &state) < 0) {
1967                 nlmsg_free(msg);
1968                 return -ENOBUFS;
1969         }
1970
1971         return genlmsg_reply(msg, info);
1972 }
1973
1974 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1975         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1976         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1977         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1978         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1979         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1980 };
1981
1982 static int parse_txq_params(struct nlattr *tb[],
1983                             struct ieee80211_txq_params *txq_params)
1984 {
1985         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1986             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1987             !tb[NL80211_TXQ_ATTR_AIFS])
1988                 return -EINVAL;
1989
1990         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1991         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1992         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1993         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1994         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1995
1996         if (txq_params->ac >= NL80211_NUM_ACS)
1997                 return -EINVAL;
1998
1999         return 0;
2000 }
2001
2002 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
2003 {
2004         /*
2005          * You can only set the channel explicitly for WDS interfaces,
2006          * all others have their channel managed via their respective
2007          * "establish a connection" command (connect, join, ...)
2008          *
2009          * For AP/GO and mesh mode, the channel can be set with the
2010          * channel userspace API, but is only stored and passed to the
2011          * low-level driver when the AP starts or the mesh is joined.
2012          * This is for backward compatibility, userspace can also give
2013          * the channel in the start-ap or join-mesh commands instead.
2014          *
2015          * Monitors are special as they are normally slaved to
2016          * whatever else is going on, so they have their own special
2017          * operation to set the monitor channel if possible.
2018          */
2019         return !wdev ||
2020                 wdev->iftype == NL80211_IFTYPE_AP ||
2021                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2022                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2023                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2024 }
2025
2026 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2027                                  struct genl_info *info,
2028                                  struct cfg80211_chan_def *chandef)
2029 {
2030         u32 control_freq;
2031
2032         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2033                 return -EINVAL;
2034
2035         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2036
2037         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2038         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2039         chandef->center_freq1 = control_freq;
2040         chandef->center_freq2 = 0;
2041
2042         /* Primary channel not allowed */
2043         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2044                 return -EINVAL;
2045
2046         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2047                 enum nl80211_channel_type chantype;
2048
2049                 chantype = nla_get_u32(
2050                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2051
2052                 switch (chantype) {
2053                 case NL80211_CHAN_NO_HT:
2054                 case NL80211_CHAN_HT20:
2055                 case NL80211_CHAN_HT40PLUS:
2056                 case NL80211_CHAN_HT40MINUS:
2057                         cfg80211_chandef_create(chandef, chandef->chan,
2058                                                 chantype);
2059                         break;
2060                 default:
2061                         return -EINVAL;
2062                 }
2063         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2064                 chandef->width =
2065                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2066                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2067                         chandef->center_freq1 =
2068                                 nla_get_u32(
2069                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2070                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2071                         chandef->center_freq2 =
2072                                 nla_get_u32(
2073                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2074         }
2075
2076         if (!cfg80211_chandef_valid(chandef))
2077                 return -EINVAL;
2078
2079         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2080                                      IEEE80211_CHAN_DISABLED))
2081                 return -EINVAL;
2082
2083         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2084              chandef->width == NL80211_CHAN_WIDTH_10) &&
2085             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2086                 return -EINVAL;
2087
2088         return 0;
2089 }
2090
2091 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2092                                  struct net_device *dev,
2093                                  struct genl_info *info)
2094 {
2095         struct cfg80211_chan_def chandef;
2096         int result;
2097         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2098         struct wireless_dev *wdev = NULL;
2099
2100         if (dev)
2101                 wdev = dev->ieee80211_ptr;
2102         if (!nl80211_can_set_dev_channel(wdev))
2103                 return -EOPNOTSUPP;
2104         if (wdev)
2105                 iftype = wdev->iftype;
2106
2107         result = nl80211_parse_chandef(rdev, info, &chandef);
2108         if (result)
2109                 return result;
2110
2111         switch (iftype) {
2112         case NL80211_IFTYPE_AP:
2113         case NL80211_IFTYPE_P2P_GO:
2114                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2115                                                    iftype)) {
2116                         result = -EINVAL;
2117                         break;
2118                 }
2119                 if (wdev->beacon_interval) {
2120                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2121                             !(rdev->wiphy.features &
2122                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2123                                 result = -EBUSY;
2124                                 break;
2125                         }
2126
2127                         /* Only allow dynamic channel width changes */
2128                         if (chandef.chan != wdev->preset_chandef.chan) {
2129                                 result = -EBUSY;
2130                                 break;
2131                         }
2132                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2133                         if (result)
2134                                 break;
2135                 }
2136                 wdev->preset_chandef = chandef;
2137                 result = 0;
2138                 break;
2139         case NL80211_IFTYPE_MESH_POINT:
2140                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2141                 break;
2142         case NL80211_IFTYPE_MONITOR:
2143                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2144                 break;
2145         default:
2146                 result = -EINVAL;
2147         }
2148
2149         return result;
2150 }
2151
2152 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2153 {
2154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2155         struct net_device *netdev = info->user_ptr[1];
2156
2157         return __nl80211_set_channel(rdev, netdev, info);
2158 }
2159
2160 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2161 {
2162         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2163         struct net_device *dev = info->user_ptr[1];
2164         struct wireless_dev *wdev = dev->ieee80211_ptr;
2165         const u8 *bssid;
2166
2167         if (!info->attrs[NL80211_ATTR_MAC])
2168                 return -EINVAL;
2169
2170         if (netif_running(dev))
2171                 return -EBUSY;
2172
2173         if (!rdev->ops->set_wds_peer)
2174                 return -EOPNOTSUPP;
2175
2176         if (wdev->iftype != NL80211_IFTYPE_WDS)
2177                 return -EOPNOTSUPP;
2178
2179         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2180         return rdev_set_wds_peer(rdev, dev, bssid);
2181 }
2182
2183 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2184 {
2185         struct cfg80211_registered_device *rdev;
2186         struct net_device *netdev = NULL;
2187         struct wireless_dev *wdev;
2188         int result = 0, rem_txq_params = 0;
2189         struct nlattr *nl_txq_params;
2190         u32 changed;
2191         u8 retry_short = 0, retry_long = 0;
2192         u32 frag_threshold = 0, rts_threshold = 0;
2193         u8 coverage_class = 0;
2194
2195         ASSERT_RTNL();
2196
2197         /*
2198          * Try to find the wiphy and netdev. Normally this
2199          * function shouldn't need the netdev, but this is
2200          * done for backward compatibility -- previously
2201          * setting the channel was done per wiphy, but now
2202          * it is per netdev. Previous userland like hostapd
2203          * also passed a netdev to set_wiphy, so that it is
2204          * possible to let that go to the right netdev!
2205          */
2206
2207         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2208                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2209
2210                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2211                 if (netdev && netdev->ieee80211_ptr)
2212                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2213                 else
2214                         netdev = NULL;
2215         }
2216
2217         if (!netdev) {
2218                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2219                                                   info->attrs);
2220                 if (IS_ERR(rdev))
2221                         return PTR_ERR(rdev);
2222                 wdev = NULL;
2223                 netdev = NULL;
2224                 result = 0;
2225         } else
2226                 wdev = netdev->ieee80211_ptr;
2227
2228         /*
2229          * end workaround code, by now the rdev is available
2230          * and locked, and wdev may or may not be NULL.
2231          */
2232
2233         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2234                 result = cfg80211_dev_rename(
2235                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2236
2237         if (result)
2238                 return result;
2239
2240         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2241                 struct ieee80211_txq_params txq_params;
2242                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2243
2244                 if (!rdev->ops->set_txq_params)
2245                         return -EOPNOTSUPP;
2246
2247                 if (!netdev)
2248                         return -EINVAL;
2249
2250                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2251                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2252                         return -EINVAL;
2253
2254                 if (!netif_running(netdev))
2255                         return -ENETDOWN;
2256
2257                 nla_for_each_nested(nl_txq_params,
2258                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2259                                     rem_txq_params) {
2260                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2261                                            nla_data(nl_txq_params),
2262                                            nla_len(nl_txq_params),
2263                                            txq_params_policy);
2264                         if (result)
2265                                 return result;
2266                         result = parse_txq_params(tb, &txq_params);
2267                         if (result)
2268                                 return result;
2269
2270                         result = rdev_set_txq_params(rdev, netdev,
2271                                                      &txq_params);
2272                         if (result)
2273                                 return result;
2274                 }
2275         }
2276
2277         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2278                 result = __nl80211_set_channel(
2279                         rdev,
2280                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2281                         info);
2282                 if (result)
2283                         return result;
2284         }
2285
2286         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2287                 struct wireless_dev *txp_wdev = wdev;
2288                 enum nl80211_tx_power_setting type;
2289                 int idx, mbm = 0;
2290
2291                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2292                         txp_wdev = NULL;
2293
2294                 if (!rdev->ops->set_tx_power)
2295                         return -EOPNOTSUPP;
2296
2297                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2298                 type = nla_get_u32(info->attrs[idx]);
2299
2300                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2301                     (type != NL80211_TX_POWER_AUTOMATIC))
2302                         return -EINVAL;
2303
2304                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2305                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2306                         mbm = nla_get_u32(info->attrs[idx]);
2307                 }
2308
2309                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2310                 if (result)
2311                         return result;
2312         }
2313
2314         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2315             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2316                 u32 tx_ant, rx_ant;
2317
2318                 if ((!rdev->wiphy.available_antennas_tx &&
2319                      !rdev->wiphy.available_antennas_rx) ||
2320                     !rdev->ops->set_antenna)
2321                         return -EOPNOTSUPP;
2322
2323                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2324                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2325
2326                 /* reject antenna configurations which don't match the
2327                  * available antenna masks, except for the "all" mask */
2328                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2329                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2330                         return -EINVAL;
2331
2332                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2333                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2334
2335                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2336                 if (result)
2337                         return result;
2338         }
2339
2340         changed = 0;
2341
2342         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2343                 retry_short = nla_get_u8(
2344                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2345                 if (retry_short == 0)
2346                         return -EINVAL;
2347
2348                 changed |= WIPHY_PARAM_RETRY_SHORT;
2349         }
2350
2351         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2352                 retry_long = nla_get_u8(
2353                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2354                 if (retry_long == 0)
2355                         return -EINVAL;
2356
2357                 changed |= WIPHY_PARAM_RETRY_LONG;
2358         }
2359
2360         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2361                 frag_threshold = nla_get_u32(
2362                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2363                 if (frag_threshold < 256)
2364                         return -EINVAL;
2365
2366                 if (frag_threshold != (u32) -1) {
2367                         /*
2368                          * Fragments (apart from the last one) are required to
2369                          * have even length. Make the fragmentation code
2370                          * simpler by stripping LSB should someone try to use
2371                          * odd threshold value.
2372                          */
2373                         frag_threshold &= ~0x1;
2374                 }
2375                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2376         }
2377
2378         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2379                 rts_threshold = nla_get_u32(
2380                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2381                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2382         }
2383
2384         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2385                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2386                         return -EINVAL;
2387
2388                 coverage_class = nla_get_u8(
2389                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2390                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2391         }
2392
2393         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2394                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2395                         return -EOPNOTSUPP;
2396
2397                 changed |= WIPHY_PARAM_DYN_ACK;
2398         }
2399
2400         if (changed) {
2401                 u8 old_retry_short, old_retry_long;
2402                 u32 old_frag_threshold, old_rts_threshold;
2403                 u8 old_coverage_class;
2404
2405                 if (!rdev->ops->set_wiphy_params)
2406                         return -EOPNOTSUPP;
2407
2408                 old_retry_short = rdev->wiphy.retry_short;
2409                 old_retry_long = rdev->wiphy.retry_long;
2410                 old_frag_threshold = rdev->wiphy.frag_threshold;
2411                 old_rts_threshold = rdev->wiphy.rts_threshold;
2412                 old_coverage_class = rdev->wiphy.coverage_class;
2413
2414                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2415                         rdev->wiphy.retry_short = retry_short;
2416                 if (changed & WIPHY_PARAM_RETRY_LONG)
2417                         rdev->wiphy.retry_long = retry_long;
2418                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2419                         rdev->wiphy.frag_threshold = frag_threshold;
2420                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2421                         rdev->wiphy.rts_threshold = rts_threshold;
2422                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2423                         rdev->wiphy.coverage_class = coverage_class;
2424
2425                 result = rdev_set_wiphy_params(rdev, changed);
2426                 if (result) {
2427                         rdev->wiphy.retry_short = old_retry_short;
2428                         rdev->wiphy.retry_long = old_retry_long;
2429                         rdev->wiphy.frag_threshold = old_frag_threshold;
2430                         rdev->wiphy.rts_threshold = old_rts_threshold;
2431                         rdev->wiphy.coverage_class = old_coverage_class;
2432                         return result;
2433                 }
2434         }
2435         return 0;
2436 }
2437
2438 static inline u64 wdev_id(struct wireless_dev *wdev)
2439 {
2440         return (u64)wdev->identifier |
2441                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2442 }
2443
2444 static int nl80211_send_chandef(struct sk_buff *msg,
2445                                 const struct cfg80211_chan_def *chandef)
2446 {
2447         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2448                 return -EINVAL;
2449
2450         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2451                         chandef->chan->center_freq))
2452                 return -ENOBUFS;
2453         switch (chandef->width) {
2454         case NL80211_CHAN_WIDTH_20_NOHT:
2455         case NL80211_CHAN_WIDTH_20:
2456         case NL80211_CHAN_WIDTH_40:
2457                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2458                                 cfg80211_get_chandef_type(chandef)))
2459                         return -ENOBUFS;
2460                 break;
2461         default:
2462                 break;
2463         }
2464         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2465                 return -ENOBUFS;
2466         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2467                 return -ENOBUFS;
2468         if (chandef->center_freq2 &&
2469             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2470                 return -ENOBUFS;
2471         return 0;
2472 }
2473
2474 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2475                               struct cfg80211_registered_device *rdev,
2476                               struct wireless_dev *wdev, bool removal)
2477 {
2478         struct net_device *dev = wdev->netdev;
2479         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2480         void *hdr;
2481
2482         if (removal)
2483                 cmd = NL80211_CMD_DEL_INTERFACE;
2484
2485         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2486         if (!hdr)
2487                 return -1;
2488
2489         if (dev &&
2490             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2491              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2492                 goto nla_put_failure;
2493
2494         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2495             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2496             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2497                               NL80211_ATTR_PAD) ||
2498             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2499             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2500                         rdev->devlist_generation ^
2501                         (cfg80211_rdev_list_generation << 2)))
2502                 goto nla_put_failure;
2503
2504         if (rdev->ops->get_channel) {
2505                 int ret;
2506                 struct cfg80211_chan_def chandef;
2507
2508                 ret = rdev_get_channel(rdev, wdev, &chandef);
2509                 if (ret == 0) {
2510                         if (nl80211_send_chandef(msg, &chandef))
2511                                 goto nla_put_failure;
2512                 }
2513         }
2514
2515         if (rdev->ops->get_tx_power) {
2516                 int dbm, ret;
2517
2518                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2519                 if (ret == 0 &&
2520                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2521                                 DBM_TO_MBM(dbm)))
2522                         goto nla_put_failure;
2523         }
2524
2525         if (wdev->ssid_len) {
2526                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2527                         goto nla_put_failure;
2528         }
2529
2530         genlmsg_end(msg, hdr);
2531         return 0;
2532
2533  nla_put_failure:
2534         genlmsg_cancel(msg, hdr);
2535         return -EMSGSIZE;
2536 }
2537
2538 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2539 {
2540         int wp_idx = 0;
2541         int if_idx = 0;
2542         int wp_start = cb->args[0];
2543         int if_start = cb->args[1];
2544         int filter_wiphy = -1;
2545         struct cfg80211_registered_device *rdev;
2546         struct wireless_dev *wdev;
2547
2548         rtnl_lock();
2549         if (!cb->args[2]) {
2550                 struct nl80211_dump_wiphy_state state = {
2551                         .filter_wiphy = -1,
2552                 };
2553                 int ret;
2554
2555                 ret = nl80211_dump_wiphy_parse(skb, cb, &state);
2556                 if (ret)
2557                         return ret;
2558
2559                 filter_wiphy = state.filter_wiphy;
2560
2561                 /*
2562                  * if filtering, set cb->args[2] to +1 since 0 is the default
2563                  * value needed to determine that parsing is necessary.
2564                  */
2565                 if (filter_wiphy >= 0)
2566                         cb->args[2] = filter_wiphy + 1;
2567                 else
2568                         cb->args[2] = -1;
2569         } else if (cb->args[2] > 0) {
2570                 filter_wiphy = cb->args[2] - 1;
2571         }
2572
2573         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2574                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2575                         continue;
2576                 if (wp_idx < wp_start) {
2577                         wp_idx++;
2578                         continue;
2579                 }
2580
2581                 if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
2582                         continue;
2583
2584                 if_idx = 0;
2585
2586                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2587                         if (if_idx < if_start) {
2588                                 if_idx++;
2589                                 continue;
2590                         }
2591                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2592                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2593                                                rdev, wdev, false) < 0) {
2594                                 goto out;
2595                         }
2596                         if_idx++;
2597                 }
2598
2599                 wp_idx++;
2600         }
2601  out:
2602         rtnl_unlock();
2603
2604         cb->args[0] = wp_idx;
2605         cb->args[1] = if_idx;
2606
2607         return skb->len;
2608 }
2609
2610 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2611 {
2612         struct sk_buff *msg;
2613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2614         struct wireless_dev *wdev = info->user_ptr[1];
2615
2616         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2617         if (!msg)
2618                 return -ENOMEM;
2619
2620         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2621                                rdev, wdev, false) < 0) {
2622                 nlmsg_free(msg);
2623                 return -ENOBUFS;
2624         }
2625
2626         return genlmsg_reply(msg, info);
2627 }
2628
2629 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2630         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2631         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2632         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2633         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2634         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2635         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2636 };
2637
2638 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2639 {
2640         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2641         int flag;
2642
2643         *mntrflags = 0;
2644
2645         if (!nla)
2646                 return -EINVAL;
2647
2648         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2649                              nla, mntr_flags_policy))
2650                 return -EINVAL;
2651
2652         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2653                 if (flags[flag])
2654                         *mntrflags |= (1<<flag);
2655
2656         return 0;
2657 }
2658
2659 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2660                                struct net_device *netdev, u8 use_4addr,
2661                                enum nl80211_iftype iftype)
2662 {
2663         if (!use_4addr) {
2664                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2665                         return -EBUSY;
2666                 return 0;
2667         }
2668
2669         switch (iftype) {
2670         case NL80211_IFTYPE_AP_VLAN:
2671                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2672                         return 0;
2673                 break;
2674         case NL80211_IFTYPE_STATION:
2675                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2676                         return 0;
2677                 break;
2678         default:
2679                 break;
2680         }
2681
2682         return -EOPNOTSUPP;
2683 }
2684
2685 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2686 {
2687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2688         struct vif_params params;
2689         int err;
2690         enum nl80211_iftype otype, ntype;
2691         struct net_device *dev = info->user_ptr[1];
2692         u32 _flags, *flags = NULL;
2693         bool change = false;
2694
2695         memset(&params, 0, sizeof(params));
2696
2697         otype = ntype = dev->ieee80211_ptr->iftype;
2698
2699         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2700                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2701                 if (otype != ntype)
2702                         change = true;
2703                 if (ntype > NL80211_IFTYPE_MAX)
2704                         return -EINVAL;
2705         }
2706
2707         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2708                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2709
2710                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2711                         return -EINVAL;
2712                 if (netif_running(dev))
2713                         return -EBUSY;
2714
2715                 wdev_lock(wdev);
2716                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2717                              IEEE80211_MAX_MESH_ID_LEN);
2718                 wdev->mesh_id_up_len =
2719                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2720                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2721                        wdev->mesh_id_up_len);
2722                 wdev_unlock(wdev);
2723         }
2724
2725         if (info->attrs[NL80211_ATTR_4ADDR]) {
2726                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2727                 change = true;
2728                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2729                 if (err)
2730                         return err;
2731         } else {
2732                 params.use_4addr = -1;
2733         }
2734
2735         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2736                 if (ntype != NL80211_IFTYPE_MONITOR)
2737                         return -EINVAL;
2738                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2739                                           &_flags);
2740                 if (err)
2741                         return err;
2742
2743                 flags = &_flags;
2744                 change = true;
2745         }
2746
2747         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2748                 const u8 *mumimo_groups;
2749                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2750
2751                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2752                         return -EOPNOTSUPP;
2753
2754                 mumimo_groups =
2755                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2756
2757                 /* bits 0 and 63 are reserved and must be zero */
2758                 if ((mumimo_groups[0] & BIT(7)) ||
2759                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
2760                         return -EINVAL;
2761
2762                 memcpy(params.vht_mumimo_groups, mumimo_groups,
2763                        VHT_MUMIMO_GROUPS_DATA_LEN);
2764                 change = true;
2765         }
2766
2767         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2768                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2769
2770                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2771                         return -EOPNOTSUPP;
2772
2773                 nla_memcpy(params.macaddr,
2774                            info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR],
2775                            ETH_ALEN);
2776                 change = true;
2777         }
2778
2779         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2780             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2781                 return -EOPNOTSUPP;
2782
2783         if (change)
2784                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2785         else
2786                 err = 0;
2787
2788         if (!err && params.use_4addr != -1)
2789                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2790
2791         return err;
2792 }
2793
2794 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2795 {
2796         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2797         struct vif_params params;
2798         struct wireless_dev *wdev;
2799         struct sk_buff *msg;
2800         int err;
2801         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2802         u32 flags;
2803
2804         /* to avoid failing a new interface creation due to pending removal */
2805         cfg80211_destroy_ifaces(rdev);
2806
2807         memset(&params, 0, sizeof(params));
2808
2809         if (!info->attrs[NL80211_ATTR_IFNAME])
2810                 return -EINVAL;
2811
2812         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2813                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2814                 if (type > NL80211_IFTYPE_MAX)
2815                         return -EINVAL;
2816         }
2817
2818         if (!rdev->ops->add_virtual_intf ||
2819             !(rdev->wiphy.interface_modes & (1 << type)))
2820                 return -EOPNOTSUPP;
2821
2822         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2823              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2824             info->attrs[NL80211_ATTR_MAC]) {
2825                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2826                            ETH_ALEN);
2827                 if (!is_valid_ether_addr(params.macaddr))
2828                         return -EADDRNOTAVAIL;
2829         }
2830
2831         if (info->attrs[NL80211_ATTR_4ADDR]) {
2832                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2833                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2834                 if (err)
2835                         return err;
2836         }
2837
2838         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2839                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2840                                   &flags);
2841
2842         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2843             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2844                 return -EOPNOTSUPP;
2845
2846         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2847         if (!msg)
2848                 return -ENOMEM;
2849
2850         wdev = rdev_add_virtual_intf(rdev,
2851                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2852                                 NET_NAME_USER, type, err ? NULL : &flags,
2853                                 &params);
2854         if (WARN_ON(!wdev)) {
2855                 nlmsg_free(msg);
2856                 return -EPROTO;
2857         } else if (IS_ERR(wdev)) {
2858                 nlmsg_free(msg);
2859                 return PTR_ERR(wdev);
2860         }
2861
2862         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2863                 wdev->owner_nlportid = info->snd_portid;
2864
2865         switch (type) {
2866         case NL80211_IFTYPE_MESH_POINT:
2867                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2868                         break;
2869                 wdev_lock(wdev);
2870                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2871                              IEEE80211_MAX_MESH_ID_LEN);
2872                 wdev->mesh_id_up_len =
2873                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2874                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2875                        wdev->mesh_id_up_len);
2876                 wdev_unlock(wdev);
2877                 break;
2878         case NL80211_IFTYPE_P2P_DEVICE:
2879                 /*
2880                  * P2P Device doesn't have a netdev, so doesn't go
2881                  * through the netdev notifier and must be added here
2882                  */
2883                 mutex_init(&wdev->mtx);
2884                 INIT_LIST_HEAD(&wdev->event_list);
2885                 spin_lock_init(&wdev->event_lock);
2886                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2887                 spin_lock_init(&wdev->mgmt_registrations_lock);
2888
2889                 wdev->identifier = ++rdev->wdev_id;
2890                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2891                 rdev->devlist_generation++;
2892                 break;
2893         default:
2894                 break;
2895         }
2896
2897         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2898                                rdev, wdev, false) < 0) {
2899                 nlmsg_free(msg);
2900                 return -ENOBUFS;
2901         }
2902
2903         /*
2904          * For wdevs which have no associated netdev object (e.g. of type
2905          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
2906          * For all other types, the event will be generated from the
2907          * netdev notifier
2908          */
2909         if (!wdev->netdev)
2910                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
2911
2912         return genlmsg_reply(msg, info);
2913 }
2914
2915 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2916 {
2917         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2918         struct wireless_dev *wdev = info->user_ptr[1];
2919
2920         if (!rdev->ops->del_virtual_intf)
2921                 return -EOPNOTSUPP;
2922
2923         /*
2924          * If we remove a wireless device without a netdev then clear
2925          * user_ptr[1] so that nl80211_post_doit won't dereference it
2926          * to check if it needs to do dev_put(). Otherwise it crashes
2927          * since the wdev has been freed, unlike with a netdev where
2928          * we need the dev_put() for the netdev to really be freed.
2929          */
2930         if (!wdev->netdev)
2931                 info->user_ptr[1] = NULL;
2932
2933         return rdev_del_virtual_intf(rdev, wdev);
2934 }
2935
2936 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2937 {
2938         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2939         struct net_device *dev = info->user_ptr[1];
2940         u16 noack_map;
2941
2942         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2943                 return -EINVAL;
2944
2945         if (!rdev->ops->set_noack_map)
2946                 return -EOPNOTSUPP;
2947
2948         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2949
2950         return rdev_set_noack_map(rdev, dev, noack_map);
2951 }
2952
2953 struct get_key_cookie {
2954         struct sk_buff *msg;
2955         int error;
2956         int idx;
2957 };
2958
2959 static void get_key_callback(void *c, struct key_params *params)
2960 {
2961         struct nlattr *key;
2962         struct get_key_cookie *cookie = c;
2963
2964         if ((params->key &&
2965              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2966                      params->key_len, params->key)) ||
2967             (params->seq &&
2968              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2969                      params->seq_len, params->seq)) ||
2970             (params->cipher &&
2971              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2972                          params->cipher)))
2973                 goto nla_put_failure;
2974
2975         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2976         if (!key)
2977                 goto nla_put_failure;
2978
2979         if ((params->key &&
2980              nla_put(cookie->msg, NL80211_KEY_DATA,
2981                      params->key_len, params->key)) ||
2982             (params->seq &&
2983              nla_put(cookie->msg, NL80211_KEY_SEQ,
2984                      params->seq_len, params->seq)) ||
2985             (params->cipher &&
2986              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2987                          params->cipher)))
2988                 goto nla_put_failure;
2989
2990         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2991                 goto nla_put_failure;
2992
2993         nla_nest_end(cookie->msg, key);
2994
2995         return;
2996  nla_put_failure:
2997         cookie->error = 1;
2998 }
2999
3000 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
3001 {
3002         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3003         int err;
3004         struct net_device *dev = info->user_ptr[1];
3005         u8 key_idx = 0;
3006         const u8 *mac_addr = NULL;
3007         bool pairwise;
3008         struct get_key_cookie cookie = {
3009                 .error = 0,
3010         };
3011         void *hdr;
3012         struct sk_buff *msg;
3013
3014         if (info->attrs[NL80211_ATTR_KEY_IDX])
3015                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
3016
3017         if (key_idx > 5)
3018                 return -EINVAL;
3019
3020         if (info->attrs[NL80211_ATTR_MAC])
3021                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3022
3023         pairwise = !!mac_addr;
3024         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3025                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3026
3027                 if (kt >= NUM_NL80211_KEYTYPES)
3028                         return -EINVAL;
3029                 if (kt != NL80211_KEYTYPE_GROUP &&
3030                     kt != NL80211_KEYTYPE_PAIRWISE)
3031                         return -EINVAL;
3032                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3033         }
3034
3035         if (!rdev->ops->get_key)
3036                 return -EOPNOTSUPP;
3037
3038         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3039                 return -ENOENT;
3040
3041         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3042         if (!msg)
3043                 return -ENOMEM;
3044
3045         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3046                              NL80211_CMD_NEW_KEY);
3047         if (!hdr)
3048                 goto nla_put_failure;
3049
3050         cookie.msg = msg;
3051         cookie.idx = key_idx;
3052
3053         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3054             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3055                 goto nla_put_failure;
3056         if (mac_addr &&
3057             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3058                 goto nla_put_failure;
3059
3060         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3061                            get_key_callback);
3062
3063         if (err)
3064                 goto free_msg;
3065
3066         if (cookie.error)
3067                 goto nla_put_failure;
3068
3069         genlmsg_end(msg, hdr);
3070         return genlmsg_reply(msg, info);
3071
3072  nla_put_failure:
3073         err = -ENOBUFS;
3074  free_msg:
3075         nlmsg_free(msg);
3076         return err;
3077 }
3078
3079 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3080 {
3081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3082         struct key_parse key;
3083         int err;
3084         struct net_device *dev = info->user_ptr[1];
3085
3086         err = nl80211_parse_key(info, &key);
3087         if (err)
3088                 return err;
3089
3090         if (key.idx < 0)
3091                 return -EINVAL;
3092
3093         /* only support setting default key */
3094         if (!key.def && !key.defmgmt)
3095                 return -EINVAL;
3096
3097         wdev_lock(dev->ieee80211_ptr);
3098
3099         if (key.def) {
3100                 if (!rdev->ops->set_default_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_key(rdev, dev, key.idx,
3110                                                  key.def_uni, key.def_multi);
3111
3112                 if (err)
3113                         goto out;
3114
3115 #ifdef CONFIG_CFG80211_WEXT
3116                 dev->ieee80211_ptr->wext.default_key = key.idx;
3117 #endif
3118         } else {
3119                 if (key.def_uni || !key.def_multi) {
3120                         err = -EINVAL;
3121                         goto out;
3122                 }
3123
3124                 if (!rdev->ops->set_default_mgmt_key) {
3125                         err = -EOPNOTSUPP;
3126                         goto out;
3127                 }
3128
3129                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3130                 if (err)
3131                         goto out;
3132
3133                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3134                 if (err)
3135                         goto out;
3136
3137 #ifdef CONFIG_CFG80211_WEXT
3138                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3139 #endif
3140         }
3141
3142  out:
3143         wdev_unlock(dev->ieee80211_ptr);
3144
3145         return err;
3146 }
3147
3148 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3149 {
3150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3151         int err;
3152         struct net_device *dev = info->user_ptr[1];
3153         struct key_parse key;
3154         const u8 *mac_addr = NULL;
3155
3156         err = nl80211_parse_key(info, &key);
3157         if (err)
3158                 return err;
3159
3160         if (!key.p.key)
3161                 return -EINVAL;
3162
3163         if (info->attrs[NL80211_ATTR_MAC])
3164                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3165
3166         if (key.type == -1) {
3167                 if (mac_addr)
3168                         key.type = NL80211_KEYTYPE_PAIRWISE;
3169                 else
3170                         key.type = NL80211_KEYTYPE_GROUP;
3171         }
3172
3173         /* for now */
3174         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3175             key.type != NL80211_KEYTYPE_GROUP)
3176                 return -EINVAL;
3177
3178         if (!rdev->ops->add_key)
3179                 return -EOPNOTSUPP;
3180
3181         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3182                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3183                                            mac_addr))
3184                 return -EINVAL;
3185
3186         wdev_lock(dev->ieee80211_ptr);
3187         err = nl80211_key_allowed(dev->ieee80211_ptr);
3188         if (!err)
3189                 err = rdev_add_key(rdev, dev, key.idx,
3190                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3191                                     mac_addr, &key.p);
3192         wdev_unlock(dev->ieee80211_ptr);
3193
3194         return err;
3195 }
3196
3197 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3198 {
3199         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3200         int err;
3201         struct net_device *dev = info->user_ptr[1];
3202         u8 *mac_addr = NULL;
3203         struct key_parse key;
3204
3205         err = nl80211_parse_key(info, &key);
3206         if (err)
3207                 return err;
3208
3209         if (info->attrs[NL80211_ATTR_MAC])
3210                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3211
3212         if (key.type == -1) {
3213                 if (mac_addr)
3214                         key.type = NL80211_KEYTYPE_PAIRWISE;
3215                 else
3216                         key.type = NL80211_KEYTYPE_GROUP;
3217         }
3218
3219         /* for now */
3220         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3221             key.type != NL80211_KEYTYPE_GROUP)
3222                 return -EINVAL;
3223
3224         if (!rdev->ops->del_key)
3225                 return -EOPNOTSUPP;
3226
3227         wdev_lock(dev->ieee80211_ptr);
3228         err = nl80211_key_allowed(dev->ieee80211_ptr);
3229
3230         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3231             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3232                 err = -ENOENT;
3233
3234         if (!err)
3235                 err = rdev_del_key(rdev, dev, key.idx,
3236                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3237                                    mac_addr);
3238
3239 #ifdef CONFIG_CFG80211_WEXT
3240         if (!err) {
3241                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3242                         dev->ieee80211_ptr->wext.default_key = -1;
3243                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3244                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3245         }
3246 #endif
3247         wdev_unlock(dev->ieee80211_ptr);
3248
3249         return err;
3250 }
3251
3252 /* This function returns an error or the number of nested attributes */
3253 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3254 {
3255         struct nlattr *attr;
3256         int n_entries = 0, tmp;
3257
3258         nla_for_each_nested(attr, nl_attr, tmp) {
3259                 if (nla_len(attr) != ETH_ALEN)
3260                         return -EINVAL;
3261
3262                 n_entries++;
3263         }
3264
3265         return n_entries;
3266 }
3267
3268 /*
3269  * This function parses ACL information and allocates memory for ACL data.
3270  * On successful return, the calling function is responsible to free the
3271  * ACL buffer returned by this function.
3272  */
3273 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3274                                                 struct genl_info *info)
3275 {
3276         enum nl80211_acl_policy acl_policy;
3277         struct nlattr *attr;
3278         struct cfg80211_acl_data *acl;
3279         int i = 0, n_entries, tmp;
3280
3281         if (!wiphy->max_acl_mac_addrs)
3282                 return ERR_PTR(-EOPNOTSUPP);
3283
3284         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3285                 return ERR_PTR(-EINVAL);
3286
3287         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3288         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3289             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3290                 return ERR_PTR(-EINVAL);
3291
3292         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3293                 return ERR_PTR(-EINVAL);
3294
3295         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3296         if (n_entries < 0)
3297                 return ERR_PTR(n_entries);
3298
3299         if (n_entries > wiphy->max_acl_mac_addrs)
3300                 return ERR_PTR(-ENOTSUPP);
3301
3302         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3303                       GFP_KERNEL);
3304         if (!acl)
3305                 return ERR_PTR(-ENOMEM);
3306
3307         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3308                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3309                 i++;
3310         }
3311
3312         acl->n_acl_entries = n_entries;
3313         acl->acl_policy = acl_policy;
3314
3315         return acl;
3316 }
3317
3318 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3319 {
3320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3321         struct net_device *dev = info->user_ptr[1];
3322         struct cfg80211_acl_data *acl;
3323         int err;
3324
3325         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3326             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3327                 return -EOPNOTSUPP;
3328
3329         if (!dev->ieee80211_ptr->beacon_interval)
3330                 return -EINVAL;
3331
3332         acl = parse_acl_data(&rdev->wiphy, info);
3333         if (IS_ERR(acl))
3334                 return PTR_ERR(acl);
3335
3336         err = rdev_set_mac_acl(rdev, dev, acl);
3337
3338         kfree(acl);
3339
3340         return err;
3341 }
3342
3343 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
3344                            u8 *rates, u8 rates_len)
3345 {
3346         u8 i;
3347         u32 mask = 0;
3348
3349         for (i = 0; i < rates_len; i++) {
3350                 int rate = (rates[i] & 0x7f) * 5;
3351                 int ridx;
3352
3353                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
3354                         struct ieee80211_rate *srate =
3355                                 &sband->bitrates[ridx];
3356                         if (rate == srate->bitrate) {
3357                                 mask |= 1 << ridx;
3358                                 break;
3359                         }
3360                 }
3361                 if (ridx == sband->n_bitrates)
3362                         return 0; /* rate not found */
3363         }
3364
3365         return mask;
3366 }
3367
3368 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
3369                                u8 *rates, u8 rates_len,
3370                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
3371 {
3372         u8 i;
3373
3374         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
3375
3376         for (i = 0; i < rates_len; i++) {
3377                 int ridx, rbit;
3378
3379                 ridx = rates[i] / 8;
3380                 rbit = BIT(rates[i] % 8);
3381
3382                 /* check validity */
3383                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
3384                         return false;
3385
3386                 /* check availability */
3387                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
3388                         mcs[ridx] |= rbit;
3389                 else
3390                         return false;
3391         }
3392
3393         return true;
3394 }
3395
3396 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
3397 {
3398         u16 mcs_mask = 0;
3399
3400         switch (vht_mcs_map) {
3401         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
3402                 break;
3403         case IEEE80211_VHT_MCS_SUPPORT_0_7:
3404                 mcs_mask = 0x00FF;
3405                 break;
3406         case IEEE80211_VHT_MCS_SUPPORT_0_8:
3407                 mcs_mask = 0x01FF;
3408                 break;
3409         case IEEE80211_VHT_MCS_SUPPORT_0_9:
3410                 mcs_mask = 0x03FF;
3411                 break;
3412         default:
3413                 break;
3414         }
3415
3416         return mcs_mask;
3417 }
3418
3419 static void vht_build_mcs_mask(u16 vht_mcs_map,
3420                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
3421 {
3422         u8 nss;
3423
3424         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
3425                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
3426                 vht_mcs_map >>= 2;
3427         }
3428 }
3429
3430 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
3431                              struct nl80211_txrate_vht *txrate,
3432                              u16 mcs[NL80211_VHT_NSS_MAX])
3433 {
3434         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3435         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
3436         u8 i;
3437
3438         if (!sband->vht_cap.vht_supported)
3439                 return false;
3440
3441         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
3442
3443         /* Build vht_mcs_mask from VHT capabilities */
3444         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
3445
3446         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3447                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
3448                         mcs[i] = txrate->mcs[i];
3449                 else
3450                         return false;
3451         }
3452
3453         return true;
3454 }
3455
3456 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
3457         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
3458                                     .len = NL80211_MAX_SUPP_RATES },
3459         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
3460                                 .len = NL80211_MAX_SUPP_HT_RATES },
3461         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
3462         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
3463 };
3464
3465 static int nl80211_parse_tx_bitrate_mask(struct genl_info *info,
3466                                          struct cfg80211_bitrate_mask *mask)
3467 {
3468         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
3469         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3470         int rem, i;
3471         struct nlattr *tx_rates;
3472         struct ieee80211_supported_band *sband;
3473         u16 vht_tx_mcs_map;
3474
3475         memset(mask, 0, sizeof(*mask));
3476         /* Default to all rates enabled */
3477         for (i = 0; i < NUM_NL80211_BANDS; i++) {
3478                 sband = rdev->wiphy.bands[i];
3479
3480                 if (!sband)
3481                         continue;
3482
3483                 mask->control[i].legacy = (1 << sband->n_bitrates) - 1;
3484                 memcpy(mask->control[i].ht_mcs,
3485                        sband->ht_cap.mcs.rx_mask,
3486                        sizeof(mask->control[i].ht_mcs));
3487
3488                 if (!sband->vht_cap.vht_supported)
3489                         continue;
3490
3491                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3492                 vht_build_mcs_mask(vht_tx_mcs_map, mask->control[i].vht_mcs);
3493         }
3494
3495         /* if no rates are given set it back to the defaults */
3496         if (!info->attrs[NL80211_ATTR_TX_RATES])
3497                 goto out;
3498
3499         /* The nested attribute uses enum nl80211_band as the index. This maps
3500          * directly to the enum nl80211_band values used in cfg80211.
3501          */
3502         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
3503         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
3504                 enum nl80211_band band = nla_type(tx_rates);
3505                 int err;
3506
3507                 if (band < 0 || band >= NUM_NL80211_BANDS)
3508                         return -EINVAL;
3509                 sband = rdev->wiphy.bands[band];
3510                 if (sband == NULL)
3511                         return -EINVAL;
3512                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
3513                                 nla_len(tx_rates), nl80211_txattr_policy);
3514                 if (err)
3515                         return err;
3516                 if (tb[NL80211_TXRATE_LEGACY]) {
3517                         mask->control[band].legacy = rateset_to_mask(
3518                                 sband,
3519                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
3520                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
3521                         if ((mask->control[band].legacy == 0) &&
3522                             nla_len(tb[NL80211_TXRATE_LEGACY]))
3523                                 return -EINVAL;
3524                 }
3525                 if (tb[NL80211_TXRATE_HT]) {
3526                         if (!ht_rateset_to_mask(
3527                                         sband,
3528                                         nla_data(tb[NL80211_TXRATE_HT]),
3529                                         nla_len(tb[NL80211_TXRATE_HT]),
3530                                         mask->control[band].ht_mcs))
3531                                 return -EINVAL;
3532                 }
3533                 if (tb[NL80211_TXRATE_VHT]) {
3534                         if (!vht_set_mcs_mask(
3535                                         sband,
3536                                         nla_data(tb[NL80211_TXRATE_VHT]),
3537                                         mask->control[band].vht_mcs))
3538                                 return -EINVAL;
3539                 }
3540                 if (tb[NL80211_TXRATE_GI]) {
3541                         mask->control[band].gi =
3542                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
3543                         if (mask->control[band].gi > NL80211_TXRATE_FORCE_LGI)
3544                                 return -EINVAL;
3545                 }
3546
3547                 if (mask->control[band].legacy == 0) {
3548                         /* don't allow empty legacy rates if HT or VHT
3549                          * are not even supported.
3550                          */
3551                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
3552                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
3553                                 return -EINVAL;
3554
3555                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
3556                                 if (mask->control[band].ht_mcs[i])
3557                                         goto out;
3558
3559                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
3560                                 if (mask->control[band].vht_mcs[i])
3561                                         goto out;
3562
3563                         /* legacy and mcs rates may not be both empty */
3564                         return -EINVAL;
3565                 }
3566         }
3567
3568 out:
3569         return 0;
3570 }
3571
3572 static int validate_beacon_tx_rate(struct cfg80211_ap_settings *params)
3573 {
3574         u32 rate, count_ht, count_vht, i;
3575         enum nl80211_band band;
3576
3577         band = params->chandef.chan->band;
3578         rate = params->beacon_rate.control[band].legacy;
3579
3580         /* Allow only one rate */
3581         if (hweight32(rate) > 1)
3582                 return -EINVAL;
3583
3584         count_ht = 0;
3585         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
3586                 if (hweight8(params->beacon_rate.control[band].ht_mcs[i]) > 1) {
3587                         return -EINVAL;
3588                 } else if (params->beacon_rate.control[band].ht_mcs[i]) {
3589                         count_ht++;
3590                         if (count_ht > 1)
3591                                 return -EINVAL;
3592                 }
3593                 if (count_ht && rate)
3594                         return -EINVAL;
3595         }
3596
3597         count_vht = 0;
3598         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3599                 if (hweight16(params->beacon_rate.control[band].vht_mcs[i]) > 1) {
3600                         return -EINVAL;
3601                 } else if (params->beacon_rate.control[band].vht_mcs[i]) {
3602                         count_vht++;
3603                         if (count_vht > 1)
3604                                 return -EINVAL;
3605                 }
3606                 if (count_vht && rate)
3607                         return -EINVAL;
3608         }
3609
3610         if ((count_ht && count_vht) || (!rate && !count_ht && !count_vht))
3611                 return -EINVAL;
3612
3613         return 0;
3614 }
3615
3616 static int nl80211_parse_beacon(struct nlattr *attrs[],
3617                                 struct cfg80211_beacon_data *bcn)
3618 {
3619         bool haveinfo = false;
3620
3621         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3622             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3623             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3624             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3625                 return -EINVAL;
3626
3627         memset(bcn, 0, sizeof(*bcn));
3628
3629         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3630                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3631                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3632                 if (!bcn->head_len)
3633                         return -EINVAL;
3634                 haveinfo = true;
3635         }
3636
3637         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3638                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3639                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3640                 haveinfo = true;
3641         }
3642
3643         if (!haveinfo)
3644                 return -EINVAL;
3645
3646         if (attrs[NL80211_ATTR_IE]) {
3647                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3648                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3649         }
3650
3651         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3652                 bcn->proberesp_ies =
3653                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3654                 bcn->proberesp_ies_len =
3655                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3656         }
3657
3658         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3659                 bcn->assocresp_ies =
3660                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3661                 bcn->assocresp_ies_len =
3662                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3663         }
3664
3665         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3666                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3667                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3668         }
3669
3670         return 0;
3671 }
3672
3673 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3674                                    struct cfg80211_ap_settings *params)
3675 {
3676         struct wireless_dev *wdev;
3677         bool ret = false;
3678
3679         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3680                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3681                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3682                         continue;
3683
3684                 if (!wdev->preset_chandef.chan)
3685                         continue;
3686
3687                 params->chandef = wdev->preset_chandef;
3688                 ret = true;
3689                 break;
3690         }
3691
3692         return ret;
3693 }
3694
3695 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3696                                     enum nl80211_auth_type auth_type,
3697                                     enum nl80211_commands cmd)
3698 {
3699         if (auth_type > NL80211_AUTHTYPE_MAX)
3700                 return false;
3701
3702         switch (cmd) {
3703         case NL80211_CMD_AUTHENTICATE:
3704                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3705                     auth_type == NL80211_AUTHTYPE_SAE)
3706                         return false;
3707                 return true;
3708         case NL80211_CMD_CONNECT:
3709         case NL80211_CMD_START_AP:
3710                 /* SAE not supported yet */
3711                 if (auth_type == NL80211_AUTHTYPE_SAE)
3712                         return false;
3713                 return true;
3714         default:
3715                 return false;
3716         }
3717 }
3718
3719 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3720 {
3721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3722         struct net_device *dev = info->user_ptr[1];
3723         struct wireless_dev *wdev = dev->ieee80211_ptr;
3724         struct cfg80211_ap_settings params;
3725         int err;
3726
3727         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3728             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3729                 return -EOPNOTSUPP;
3730
3731         if (!rdev->ops->start_ap)
3732                 return -EOPNOTSUPP;
3733
3734         if (wdev->beacon_interval)
3735                 return -EALREADY;
3736
3737         memset(&params, 0, sizeof(params));
3738
3739         /* these are required for START_AP */
3740         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3741             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3742             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3743                 return -EINVAL;
3744
3745         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3746         if (err)
3747                 return err;
3748
3749         params.beacon_interval =
3750                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3751         params.dtim_period =
3752                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3753
3754         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3755         if (err)
3756                 return err;
3757
3758         /*
3759          * In theory, some of these attributes should be required here
3760          * but since they were not used when the command was originally
3761          * added, keep them optional for old user space programs to let
3762          * them continue to work with drivers that do not need the
3763          * additional information -- drivers must check!
3764          */
3765         if (info->attrs[NL80211_ATTR_SSID]) {
3766                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3767                 params.ssid_len =
3768                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3769                 if (params.ssid_len == 0 ||
3770                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3771                         return -EINVAL;
3772         }
3773
3774         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3775                 params.hidden_ssid = nla_get_u32(
3776                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3777                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3778                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3779                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3780                         return -EINVAL;
3781         }
3782
3783         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3784
3785         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3786                 params.auth_type = nla_get_u32(
3787                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3788                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3789                                              NL80211_CMD_START_AP))
3790                         return -EINVAL;
3791         } else
3792                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3793
3794         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3795                                       NL80211_MAX_NR_CIPHER_SUITES);
3796         if (err)
3797                 return err;
3798
3799         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3800                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3801                         return -EOPNOTSUPP;
3802                 params.inactivity_timeout = nla_get_u16(
3803                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3804         }
3805
3806         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3807                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3808                         return -EINVAL;
3809                 params.p2p_ctwindow =
3810                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3811                 if (params.p2p_ctwindow > 127)
3812                         return -EINVAL;
3813                 if (params.p2p_ctwindow != 0 &&
3814                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3815                         return -EINVAL;
3816         }
3817
3818         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3819                 u8 tmp;
3820
3821                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3822                         return -EINVAL;
3823                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3824                 if (tmp > 1)
3825                         return -EINVAL;
3826                 params.p2p_opp_ps = tmp;
3827                 if (params.p2p_opp_ps != 0 &&
3828                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3829                         return -EINVAL;
3830         }
3831
3832         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3833                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3834                 if (err)
3835                         return err;
3836         } else if (wdev->preset_chandef.chan) {
3837                 params.chandef = wdev->preset_chandef;
3838         } else if (!nl80211_get_ap_channel(rdev, &params))
3839                 return -EINVAL;
3840
3841         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3842                                            wdev->iftype))
3843                 return -EINVAL;
3844
3845         if (info->attrs[NL80211_ATTR_TX_RATES]) {
3846                 err = nl80211_parse_tx_bitrate_mask(info, &params.beacon_rate);
3847                 if (err)
3848                         return err;
3849
3850                 err = validate_beacon_tx_rate(&params);
3851                 if (err)
3852                         return err;
3853         }
3854
3855         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3856                 params.smps_mode =
3857                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3858                 switch (params.smps_mode) {
3859                 case NL80211_SMPS_OFF:
3860                         break;
3861                 case NL80211_SMPS_STATIC:
3862                         if (!(rdev->wiphy.features &
3863                               NL80211_FEATURE_STATIC_SMPS))
3864                                 return -EINVAL;
3865                         break;
3866                 case NL80211_SMPS_DYNAMIC:
3867                         if (!(rdev->wiphy.features &
3868                               NL80211_FEATURE_DYNAMIC_SMPS))
3869                                 return -EINVAL;
3870                         break;
3871                 default:
3872                         return -EINVAL;
3873                 }
3874         } else {
3875                 params.smps_mode = NL80211_SMPS_OFF;
3876         }
3877
3878         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3879         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3880                 return -EOPNOTSUPP;
3881
3882         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3883                 params.acl = parse_acl_data(&rdev->wiphy, info);
3884                 if (IS_ERR(params.acl))
3885                         return PTR_ERR(params.acl);
3886         }
3887
3888         wdev_lock(wdev);
3889         err = rdev_start_ap(rdev, dev, &params);
3890         if (!err) {
3891                 wdev->preset_chandef = params.chandef;
3892                 wdev->beacon_interval = params.beacon_interval;
3893                 wdev->chandef = params.chandef;
3894                 wdev->ssid_len = params.ssid_len;
3895                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3896         }
3897         wdev_unlock(wdev);
3898
3899         kfree(params.acl);
3900
3901         return err;
3902 }
3903
3904 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3905 {
3906         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3907         struct net_device *dev = info->user_ptr[1];
3908         struct wireless_dev *wdev = dev->ieee80211_ptr;
3909         struct cfg80211_beacon_data params;
3910         int err;
3911
3912         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3913             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3914                 return -EOPNOTSUPP;
3915
3916         if (!rdev->ops->change_beacon)
3917                 return -EOPNOTSUPP;
3918
3919         if (!wdev->beacon_interval)
3920                 return -EINVAL;
3921
3922         err = nl80211_parse_beacon(info->attrs, &params);
3923         if (err)
3924                 return err;
3925
3926         wdev_lock(wdev);
3927         err = rdev_change_beacon(rdev, dev, &params);
3928         wdev_unlock(wdev);
3929
3930         return err;
3931 }
3932
3933 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3934 {
3935         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3936         struct net_device *dev = info->user_ptr[1];
3937
3938         return cfg80211_stop_ap(rdev, dev, false);
3939 }
3940
3941 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3942         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3943         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3944         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3945         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3946         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3947         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3948 };
3949
3950 static int parse_station_flags(struct genl_info *info,
3951                                enum nl80211_iftype iftype,
3952                                struct station_parameters *params)
3953 {
3954         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3955         struct nlattr *nla;
3956         int flag;
3957
3958         /*
3959          * Try parsing the new attribute first so userspace
3960          * can specify both for older kernels.
3961          */
3962         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3963         if (nla) {
3964                 struct nl80211_sta_flag_update *sta_flags;
3965
3966                 sta_flags = nla_data(nla);
3967                 params->sta_flags_mask = sta_flags->mask;
3968                 params->sta_flags_set = sta_flags->set;
3969                 params->sta_flags_set &= params->sta_flags_mask;
3970                 if ((params->sta_flags_mask |
3971                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3972                         return -EINVAL;
3973                 return 0;
3974         }
3975
3976         /* if present, parse the old attribute */
3977
3978         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3979         if (!nla)
3980                 return 0;
3981
3982         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3983                              nla, sta_flags_policy))
3984                 return -EINVAL;
3985
3986         /*
3987          * Only allow certain flags for interface types so that
3988          * other attributes are silently ignored. Remember that
3989          * this is backward compatibility code with old userspace
3990          * and shouldn't be hit in other cases anyway.
3991          */
3992         switch (iftype) {
3993         case NL80211_IFTYPE_AP:
3994         case NL80211_IFTYPE_AP_VLAN:
3995         case NL80211_IFTYPE_P2P_GO:
3996                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3997                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3998                                          BIT(NL80211_STA_FLAG_WME) |
3999                                          BIT(NL80211_STA_FLAG_MFP);
4000                 break;
4001         case NL80211_IFTYPE_P2P_CLIENT:
4002         case NL80211_IFTYPE_STATION:
4003                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4004                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
4005                 break;
4006         case NL80211_IFTYPE_MESH_POINT:
4007                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4008                                          BIT(NL80211_STA_FLAG_MFP) |
4009                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
4010         default:
4011                 return -EINVAL;
4012         }
4013
4014         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
4015                 if (flags[flag]) {
4016                         params->sta_flags_set |= (1<<flag);
4017
4018                         /* no longer support new API additions in old API */
4019                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
4020                                 return -EINVAL;
4021                 }
4022         }
4023
4024         return 0;
4025 }
4026
4027 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
4028                                  int attr)
4029 {
4030         struct nlattr *rate;
4031         u32 bitrate;
4032         u16 bitrate_compat;
4033         enum nl80211_attrs rate_flg;
4034
4035         rate = nla_nest_start(msg, attr);
4036         if (!rate)
4037                 return false;
4038
4039         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
4040         bitrate = cfg80211_calculate_bitrate(info);
4041         /* report 16-bit bitrate only if we can */
4042         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
4043         if (bitrate > 0 &&
4044             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
4045                 return false;
4046         if (bitrate_compat > 0 &&
4047             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
4048                 return false;
4049
4050         switch (info->bw) {
4051         case RATE_INFO_BW_5:
4052                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
4053                 break;
4054         case RATE_INFO_BW_10:
4055                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
4056                 break;
4057         default:
4058                 WARN_ON(1);
4059                 /* fall through */
4060         case RATE_INFO_BW_20:
4061                 rate_flg = 0;
4062                 break;
4063         case RATE_INFO_BW_40:
4064                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
4065                 break;
4066         case RATE_INFO_BW_80:
4067                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
4068                 break;
4069         case RATE_INFO_BW_160:
4070                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
4071                 break;
4072         }
4073
4074         if (rate_flg && nla_put_flag(msg, rate_flg))
4075                 return false;
4076
4077         if (info->flags & RATE_INFO_FLAGS_MCS) {
4078                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
4079                         return false;
4080                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4081                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4082                         return false;
4083         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
4084                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
4085                         return false;
4086                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
4087                         return false;
4088                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4089                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4090                         return false;
4091         }
4092
4093         nla_nest_end(msg, rate);
4094         return true;
4095 }
4096
4097 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
4098                                int id)
4099 {
4100         void *attr;
4101         int i = 0;
4102
4103         if (!mask)
4104                 return true;
4105
4106         attr = nla_nest_start(msg, id);
4107         if (!attr)
4108                 return false;
4109
4110         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
4111                 if (!(mask & BIT(i)))
4112                         continue;
4113
4114                 if (nla_put_u8(msg, i, signal[i]))
4115                         return false;
4116         }
4117
4118         nla_nest_end(msg, attr);
4119
4120         return true;
4121 }
4122
4123 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
4124                                 u32 seq, int flags,
4125                                 struct cfg80211_registered_device *rdev,
4126                                 struct net_device *dev,
4127                                 const u8 *mac_addr, struct station_info *sinfo)
4128 {
4129         void *hdr;
4130         struct nlattr *sinfoattr, *bss_param;
4131
4132         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
4133         if (!hdr)
4134                 return -1;
4135
4136         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4137             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
4138             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
4139                 goto nla_put_failure;
4140
4141         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
4142         if (!sinfoattr)
4143                 goto nla_put_failure;
4144
4145 #define PUT_SINFO(attr, memb, type) do {                                \
4146         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
4147         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4148             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
4149                              sinfo->memb))                              \
4150                 goto nla_put_failure;                                   \
4151         } while (0)
4152 #define PUT_SINFO_U64(attr, memb) do {                                  \
4153         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4154             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
4155                               sinfo->memb, NL80211_STA_INFO_PAD))       \
4156                 goto nla_put_failure;                                   \
4157         } while (0)
4158
4159         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
4160         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
4161
4162         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
4163                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
4164             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
4165                         (u32)sinfo->rx_bytes))
4166                 goto nla_put_failure;
4167
4168         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
4169                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
4170             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
4171                         (u32)sinfo->tx_bytes))
4172                 goto nla_put_failure;
4173
4174         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
4175         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
4176         PUT_SINFO(LLID, llid, u16);
4177         PUT_SINFO(PLID, plid, u16);
4178         PUT_SINFO(PLINK_STATE, plink_state, u8);
4179         PUT_SINFO_U64(RX_DURATION, rx_duration);
4180
4181         switch (rdev->wiphy.signal_type) {
4182         case CFG80211_SIGNAL_TYPE_MBM:
4183                 PUT_SINFO(SIGNAL, signal, u8);
4184                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
4185                 break;
4186         default:
4187                 break;
4188         }
4189         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
4190                 if (!nl80211_put_signal(msg, sinfo->chains,
4191                                         sinfo->chain_signal,
4192                                         NL80211_STA_INFO_CHAIN_SIGNAL))
4193                         goto nla_put_failure;
4194         }
4195         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
4196                 if (!nl80211_put_signal(msg, sinfo->chains,
4197                                         sinfo->chain_signal_avg,
4198                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
4199                         goto nla_put_failure;
4200         }
4201         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
4202                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
4203                                           NL80211_STA_INFO_TX_BITRATE))
4204                         goto nla_put_failure;
4205         }
4206         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
4207                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
4208                                           NL80211_STA_INFO_RX_BITRATE))
4209                         goto nla_put_failure;
4210         }
4211
4212         PUT_SINFO(RX_PACKETS, rx_packets, u32);
4213         PUT_SINFO(TX_PACKETS, tx_packets, u32);
4214         PUT_SINFO(TX_RETRIES, tx_retries, u32);
4215         PUT_SINFO(TX_FAILED, tx_failed, u32);
4216         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
4217         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
4218         PUT_SINFO(LOCAL_PM, local_pm, u32);
4219         PUT_SINFO(PEER_PM, peer_pm, u32);
4220         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
4221
4222         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
4223                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
4224                 if (!bss_param)
4225                         goto nla_put_failure;
4226
4227                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
4228                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
4229                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
4230                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
4231                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
4232                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
4233                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
4234                                sinfo->bss_param.dtim_period) ||
4235                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
4236                                 sinfo->bss_param.beacon_interval))
4237                         goto nla_put_failure;
4238
4239                 nla_nest_end(msg, bss_param);
4240         }
4241         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
4242             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
4243                     sizeof(struct nl80211_sta_flag_update),
4244                     &sinfo->sta_flags))
4245                 goto nla_put_failure;
4246
4247         PUT_SINFO_U64(T_OFFSET, t_offset);
4248         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
4249         PUT_SINFO_U64(BEACON_RX, rx_beacon);
4250         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
4251
4252 #undef PUT_SINFO
4253 #undef PUT_SINFO_U64
4254
4255         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
4256                 struct nlattr *tidsattr;
4257                 int tid;
4258
4259                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
4260                 if (!tidsattr)
4261                         goto nla_put_failure;
4262
4263                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
4264                         struct cfg80211_tid_stats *tidstats;
4265                         struct nlattr *tidattr;
4266
4267                         tidstats = &sinfo->pertid[tid];
4268
4269                         if (!tidstats->filled)
4270                                 continue;
4271
4272                         tidattr = nla_nest_start(msg, tid + 1);
4273                         if (!tidattr)
4274                                 goto nla_put_failure;
4275
4276 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
4277         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
4278             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
4279                               tidstats->memb, NL80211_TID_STATS_PAD))   \
4280                 goto nla_put_failure;                                   \
4281         } while (0)
4282
4283                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
4284                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
4285                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
4286                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
4287
4288 #undef PUT_TIDVAL_U64
4289                         nla_nest_end(msg, tidattr);
4290                 }
4291
4292                 nla_nest_end(msg, tidsattr);
4293         }
4294
4295         nla_nest_end(msg, sinfoattr);
4296
4297         if (sinfo->assoc_req_ies_len &&
4298             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
4299                     sinfo->assoc_req_ies))
4300                 goto nla_put_failure;
4301
4302         genlmsg_end(msg, hdr);
4303         return 0;
4304
4305  nla_put_failure:
4306         genlmsg_cancel(msg, hdr);
4307         return -EMSGSIZE;
4308 }
4309
4310 static int nl80211_dump_station(struct sk_buff *skb,
4311                                 struct netlink_callback *cb)
4312 {
4313         struct station_info sinfo;
4314         struct cfg80211_registered_device *rdev;
4315         struct wireless_dev *wdev;
4316         u8 mac_addr[ETH_ALEN];
4317         int sta_idx = cb->args[2];
4318         int err;
4319
4320         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4321         if (err)
4322                 return err;
4323
4324         if (!wdev->netdev) {
4325                 err = -EINVAL;
4326                 goto out_err;
4327         }
4328
4329         if (!rdev->ops->dump_station) {
4330                 err = -EOPNOTSUPP;
4331                 goto out_err;
4332         }
4333
4334         while (1) {
4335                 memset(&sinfo, 0, sizeof(sinfo));
4336                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4337                                         mac_addr, &sinfo);
4338                 if (err == -ENOENT)
4339                         break;
4340                 if (err)
4341                         goto out_err;
4342
4343                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4344                                 NETLINK_CB(cb->skb).portid,
4345                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4346                                 rdev, wdev->netdev, mac_addr,
4347                                 &sinfo) < 0)
4348                         goto out;
4349
4350                 sta_idx++;
4351         }
4352
4353  out:
4354         cb->args[2] = sta_idx;
4355         err = skb->len;
4356  out_err:
4357         nl80211_finish_wdev_dump(rdev);
4358
4359         return err;
4360 }
4361
4362 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4363 {
4364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4365         struct net_device *dev = info->user_ptr[1];
4366         struct station_info sinfo;
4367         struct sk_buff *msg;
4368         u8 *mac_addr = NULL;
4369         int err;
4370
4371         memset(&sinfo, 0, sizeof(sinfo));
4372
4373         if (!info->attrs[NL80211_ATTR_MAC])
4374                 return -EINVAL;
4375
4376         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4377
4378         if (!rdev->ops->get_station)
4379                 return -EOPNOTSUPP;
4380
4381         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4382         if (err)
4383                 return err;
4384
4385         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4386         if (!msg)
4387                 return -ENOMEM;
4388
4389         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4390                                  info->snd_portid, info->snd_seq, 0,
4391                                  rdev, dev, mac_addr, &sinfo) < 0) {
4392                 nlmsg_free(msg);
4393                 return -ENOBUFS;
4394         }
4395
4396         return genlmsg_reply(msg, info);
4397 }
4398
4399 int cfg80211_check_station_change(struct wiphy *wiphy,
4400                                   struct station_parameters *params,
4401                                   enum cfg80211_station_type statype)
4402 {
4403         if (params->listen_interval != -1 &&
4404             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4405                 return -EINVAL;
4406
4407         if (params->support_p2p_ps != -1 &&
4408             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4409                 return -EINVAL;
4410
4411         if (params->aid &&
4412             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4413             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4414                 return -EINVAL;
4415
4416         /* When you run into this, adjust the code below for the new flag */
4417         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4418
4419         switch (statype) {
4420         case CFG80211_STA_MESH_PEER_KERNEL:
4421         case CFG80211_STA_MESH_PEER_USER:
4422                 /*
4423                  * No ignoring the TDLS flag here -- the userspace mesh
4424                  * code doesn't have the bug of including TDLS in the
4425                  * mask everywhere.
4426                  */
4427                 if (params->sta_flags_mask &
4428                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4429                                   BIT(NL80211_STA_FLAG_MFP) |
4430                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4431                         return -EINVAL;
4432                 break;
4433         case CFG80211_STA_TDLS_PEER_SETUP:
4434         case CFG80211_STA_TDLS_PEER_ACTIVE:
4435                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4436                         return -EINVAL;
4437                 /* ignore since it can't change */
4438                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4439                 break;
4440         default:
4441                 /* disallow mesh-specific things */
4442                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4443                         return -EINVAL;
4444                 if (params->local_pm)
4445                         return -EINVAL;
4446                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4447                         return -EINVAL;
4448         }
4449
4450         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4451             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4452                 /* TDLS can't be set, ... */
4453                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4454                         return -EINVAL;
4455                 /*
4456                  * ... but don't bother the driver with it. This works around
4457                  * a hostapd/wpa_supplicant issue -- it always includes the
4458                  * TLDS_PEER flag in the mask even for AP mode.
4459                  */
4460                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4461         }
4462
4463         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4464             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4465                 /* reject other things that can't change */
4466                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4467                         return -EINVAL;
4468                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4469                         return -EINVAL;
4470                 if (params->supported_rates)
4471                         return -EINVAL;
4472                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4473                         return -EINVAL;
4474         }
4475
4476         if (statype != CFG80211_STA_AP_CLIENT &&
4477             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4478                 if (params->vlan)
4479                         return -EINVAL;
4480         }
4481
4482         switch (statype) {
4483         case CFG80211_STA_AP_MLME_CLIENT:
4484                 /* Use this only for authorizing/unauthorizing a station */
4485                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4486                         return -EOPNOTSUPP;
4487                 break;
4488         case CFG80211_STA_AP_CLIENT:
4489         case CFG80211_STA_AP_CLIENT_UNASSOC:
4490                 /* accept only the listed bits */
4491                 if (params->sta_flags_mask &
4492                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4493                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4494                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4495                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4496                                   BIT(NL80211_STA_FLAG_WME) |
4497                                   BIT(NL80211_STA_FLAG_MFP)))
4498                         return -EINVAL;
4499
4500                 /* but authenticated/associated only if driver handles it */
4501                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4502                     params->sta_flags_mask &
4503                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4504                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4505                         return -EINVAL;
4506                 break;
4507         case CFG80211_STA_IBSS:
4508         case CFG80211_STA_AP_STA:
4509                 /* reject any changes other than AUTHORIZED */
4510                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4511                         return -EINVAL;
4512                 break;
4513         case CFG80211_STA_TDLS_PEER_SETUP:
4514                 /* reject any changes other than AUTHORIZED or WME */
4515                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4516                                                BIT(NL80211_STA_FLAG_WME)))
4517                         return -EINVAL;
4518                 /* force (at least) rates when authorizing */
4519                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4520                     !params->supported_rates)
4521                         return -EINVAL;
4522                 break;
4523         case CFG80211_STA_TDLS_PEER_ACTIVE:
4524                 /* reject any changes */
4525                 return -EINVAL;
4526         case CFG80211_STA_MESH_PEER_KERNEL:
4527                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4528                         return -EINVAL;
4529                 break;
4530         case CFG80211_STA_MESH_PEER_USER:
4531                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4532                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4533                         return -EINVAL;
4534                 break;
4535         }
4536
4537         return 0;
4538 }
4539 EXPORT_SYMBOL(cfg80211_check_station_change);
4540
4541 /*
4542  * Get vlan interface making sure it is running and on the right wiphy.
4543  */
4544 static struct net_device *get_vlan(struct genl_info *info,
4545                                    struct cfg80211_registered_device *rdev)
4546 {
4547         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4548         struct net_device *v;
4549         int ret;
4550
4551         if (!vlanattr)
4552                 return NULL;
4553
4554         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4555         if (!v)
4556                 return ERR_PTR(-ENODEV);
4557
4558         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4559                 ret = -EINVAL;
4560                 goto error;
4561         }
4562
4563         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4564             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4565             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4566                 ret = -EINVAL;
4567                 goto error;
4568         }
4569
4570         if (!netif_running(v)) {
4571                 ret = -ENETDOWN;
4572                 goto error;
4573         }
4574
4575         return v;
4576  error:
4577         dev_put(v);
4578         return ERR_PTR(ret);
4579 }
4580
4581 static const struct nla_policy
4582 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4583         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4584         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4585 };
4586
4587 static int nl80211_parse_sta_wme(struct genl_info *info,
4588                                  struct station_parameters *params)
4589 {
4590         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4591         struct nlattr *nla;
4592         int err;
4593
4594         /* parse WME attributes if present */
4595         if (!info->attrs[NL80211_ATTR_STA_WME])
4596                 return 0;
4597
4598         nla = info->attrs[NL80211_ATTR_STA_WME];
4599         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4600                                nl80211_sta_wme_policy);
4601         if (err)
4602                 return err;
4603
4604         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4605                 params->uapsd_queues = nla_get_u8(
4606                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4607         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4608                 return -EINVAL;
4609
4610         if (tb[NL80211_STA_WME_MAX_SP])
4611                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4612
4613         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4614                 return -EINVAL;
4615
4616         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4617
4618         return 0;
4619 }
4620
4621 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4622                                       struct station_parameters *params)
4623 {
4624         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4625                 params->supported_channels =
4626                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4627                 params->supported_channels_len =
4628                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4629                 /*
4630                  * Need to include at least one (first channel, number of
4631                  * channels) tuple for each subband, and must have proper
4632                  * tuples for the rest of the data as well.
4633                  */
4634                 if (params->supported_channels_len < 2)
4635                         return -EINVAL;
4636                 if (params->supported_channels_len % 2)
4637                         return -EINVAL;
4638         }
4639
4640         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4641                 params->supported_oper_classes =
4642                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4643                 params->supported_oper_classes_len =
4644                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4645                 /*
4646                  * The value of the Length field of the Supported Operating
4647                  * Classes element is between 2 and 253.
4648                  */
4649                 if (params->supported_oper_classes_len < 2 ||
4650                     params->supported_oper_classes_len > 253)
4651                         return -EINVAL;
4652         }
4653         return 0;
4654 }
4655
4656 static int nl80211_set_station_tdls(struct genl_info *info,
4657                                     struct station_parameters *params)
4658 {
4659         int err;
4660         /* Dummy STA entry gets updated once the peer capabilities are known */
4661         if (info->attrs[NL80211_ATTR_PEER_AID])
4662                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4663         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4664                 params->ht_capa =
4665                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4666         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4667                 params->vht_capa =
4668                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4669
4670         err = nl80211_parse_sta_channel_info(info, params);
4671         if (err)
4672                 return err;
4673
4674         return nl80211_parse_sta_wme(info, params);
4675 }
4676
4677 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4678 {
4679         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4680         struct net_device *dev = info->user_ptr[1];
4681         struct station_parameters params;
4682         u8 *mac_addr;
4683         int err;
4684
4685         memset(&params, 0, sizeof(params));
4686
4687         if (!rdev->ops->change_station)
4688                 return -EOPNOTSUPP;
4689
4690         /*
4691          * AID and listen_interval properties can be set only for unassociated
4692          * station. Include these parameters here and will check them in
4693          * cfg80211_check_station_change().
4694          */
4695         if (info->attrs[NL80211_ATTR_STA_AID])
4696                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4697
4698         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4699                 params.listen_interval =
4700                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4701         else
4702                 params.listen_interval = -1;
4703
4704         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4705                 u8 tmp;
4706
4707                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4708                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4709                         return -EINVAL;
4710
4711                 params.support_p2p_ps = tmp;
4712         } else {
4713                 params.support_p2p_ps = -1;
4714         }
4715
4716         if (!info->attrs[NL80211_ATTR_MAC])
4717                 return -EINVAL;
4718
4719         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4720
4721         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4722                 params.supported_rates =
4723                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4724                 params.supported_rates_len =
4725                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4726         }
4727
4728         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4729                 params.capability =
4730                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4731                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4732         }
4733
4734         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4735                 params.ext_capab =
4736                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4737                 params.ext_capab_len =
4738                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4739         }
4740
4741         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4742                 return -EINVAL;
4743
4744         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4745                 params.plink_action =
4746                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4747                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4748                         return -EINVAL;
4749         }
4750
4751         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4752                 params.plink_state =
4753                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4754                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4755                         return -EINVAL;
4756                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4757                         params.peer_aid = nla_get_u16(
4758                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4759                         if (params.peer_aid > IEEE80211_MAX_AID)
4760                                 return -EINVAL;
4761                 }
4762                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4763         }
4764
4765         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4766                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4767                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4768
4769                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4770                     pm > NL80211_MESH_POWER_MAX)
4771                         return -EINVAL;
4772
4773                 params.local_pm = pm;
4774         }
4775
4776         /* Include parameters for TDLS peer (will check later) */
4777         err = nl80211_set_station_tdls(info, &params);
4778         if (err)
4779                 return err;
4780
4781         params.vlan = get_vlan(info, rdev);
4782         if (IS_ERR(params.vlan))
4783                 return PTR_ERR(params.vlan);
4784
4785         switch (dev->ieee80211_ptr->iftype) {
4786         case NL80211_IFTYPE_AP:
4787         case NL80211_IFTYPE_AP_VLAN:
4788         case NL80211_IFTYPE_P2P_GO:
4789         case NL80211_IFTYPE_P2P_CLIENT:
4790         case NL80211_IFTYPE_STATION:
4791         case NL80211_IFTYPE_ADHOC:
4792         case NL80211_IFTYPE_MESH_POINT:
4793                 break;
4794         default:
4795                 err = -EOPNOTSUPP;
4796                 goto out_put_vlan;
4797         }
4798
4799         /* driver will call cfg80211_check_station_change() */
4800         err = rdev_change_station(rdev, dev, mac_addr, &params);
4801
4802  out_put_vlan:
4803         if (params.vlan)
4804                 dev_put(params.vlan);
4805
4806         return err;
4807 }
4808
4809 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4810 {
4811         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4812         int err;
4813         struct net_device *dev = info->user_ptr[1];
4814         struct station_parameters params;
4815         u8 *mac_addr = NULL;
4816         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4817                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4818
4819         memset(&params, 0, sizeof(params));
4820
4821         if (!rdev->ops->add_station)
4822                 return -EOPNOTSUPP;
4823
4824         if (!info->attrs[NL80211_ATTR_MAC])
4825                 return -EINVAL;
4826
4827         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4828                 return -EINVAL;
4829
4830         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4831                 return -EINVAL;
4832
4833         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4834             !info->attrs[NL80211_ATTR_PEER_AID])
4835                 return -EINVAL;
4836
4837         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4838         params.supported_rates =
4839                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4840         params.supported_rates_len =
4841                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4842         params.listen_interval =
4843                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4844
4845         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4846                 u8 tmp;
4847
4848                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4849                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4850                         return -EINVAL;
4851
4852                 params.support_p2p_ps = tmp;
4853         } else {
4854                 /*
4855                  * if not specified, assume it's supported for P2P GO interface,
4856                  * and is NOT supported for AP interface
4857                  */
4858                 params.support_p2p_ps =
4859                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4860         }
4861
4862         if (info->attrs[NL80211_ATTR_PEER_AID])
4863                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4864         else
4865                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4866         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4867                 return -EINVAL;
4868
4869         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4870                 params.capability =
4871                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4872                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4873         }
4874
4875         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4876                 params.ext_capab =
4877                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4878                 params.ext_capab_len =
4879                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4880         }
4881
4882         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4883                 params.ht_capa =
4884                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4885
4886         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4887                 params.vht_capa =
4888                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4889
4890         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4891                 params.opmode_notif_used = true;
4892                 params.opmode_notif =
4893                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4894         }
4895
4896         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4897                 params.plink_action =
4898                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4899                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4900                         return -EINVAL;
4901         }
4902
4903         err = nl80211_parse_sta_channel_info(info, &params);
4904         if (err)
4905                 return err;
4906
4907         err = nl80211_parse_sta_wme(info, &params);
4908         if (err)
4909                 return err;
4910
4911         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4912                 return -EINVAL;
4913
4914         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4915          * as userspace might just pass through the capabilities from the IEs
4916          * directly, rather than enforcing this restriction and returning an
4917          * error in this case.
4918          */
4919         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4920                 params.ht_capa = NULL;
4921                 params.vht_capa = NULL;
4922         }
4923
4924         /* When you run into this, adjust the code below for the new flag */
4925         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4926
4927         switch (dev->ieee80211_ptr->iftype) {
4928         case NL80211_IFTYPE_AP:
4929         case NL80211_IFTYPE_AP_VLAN:
4930         case NL80211_IFTYPE_P2P_GO:
4931                 /* ignore WME attributes if iface/sta is not capable */
4932                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4933                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4934                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4935
4936                 /* TDLS peers cannot be added */
4937                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4938                     info->attrs[NL80211_ATTR_PEER_AID])
4939                         return -EINVAL;
4940                 /* but don't bother the driver with it */
4941                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4942
4943                 /* allow authenticated/associated only if driver handles it */
4944                 if (!(rdev->wiphy.features &
4945                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4946                     params.sta_flags_mask & auth_assoc)
4947                         return -EINVAL;
4948
4949                 /* Older userspace, or userspace wanting to be compatible with
4950                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4951                  * and assoc flags in the mask, but assumes the station will be
4952                  * added as associated anyway since this was the required driver
4953                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4954                  * introduced.
4955                  * In order to not bother drivers with this quirk in the API
4956                  * set the flags in both the mask and set for new stations in
4957                  * this case.
4958                  */
4959                 if (!(params.sta_flags_mask & auth_assoc)) {
4960                         params.sta_flags_mask |= auth_assoc;
4961                         params.sta_flags_set |= auth_assoc;
4962                 }
4963
4964                 /* must be last in here for error handling */
4965                 params.vlan = get_vlan(info, rdev);
4966                 if (IS_ERR(params.vlan))
4967                         return PTR_ERR(params.vlan);
4968                 break;
4969         case NL80211_IFTYPE_MESH_POINT:
4970                 /* ignore uAPSD data */
4971                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4972
4973                 /* associated is disallowed */
4974                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4975                         return -EINVAL;
4976                 /* TDLS peers cannot be added */
4977                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4978                     info->attrs[NL80211_ATTR_PEER_AID])
4979                         return -EINVAL;
4980                 break;
4981         case NL80211_IFTYPE_STATION:
4982         case NL80211_IFTYPE_P2P_CLIENT:
4983                 /* ignore uAPSD data */
4984                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4985
4986                 /* these are disallowed */
4987                 if (params.sta_flags_mask &
4988                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4989                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4990                         return -EINVAL;
4991                 /* Only TDLS peers can be added */
4992                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4993                         return -EINVAL;
4994                 /* Can only add if TDLS ... */
4995                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4996                         return -EOPNOTSUPP;
4997                 /* ... with external setup is supported */
4998                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4999                         return -EOPNOTSUPP;
5000                 /*
5001                  * Older wpa_supplicant versions always mark the TDLS peer
5002                  * as authorized, but it shouldn't yet be.
5003                  */
5004                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
5005                 break;
5006         default:
5007                 return -EOPNOTSUPP;
5008         }
5009
5010         /* be aware of params.vlan when changing code here */
5011
5012         err = rdev_add_station(rdev, dev, mac_addr, &params);
5013
5014         if (params.vlan)
5015                 dev_put(params.vlan);
5016         return err;
5017 }
5018
5019 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
5020 {
5021         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5022         struct net_device *dev = info->user_ptr[1];
5023         struct station_del_parameters params;
5024
5025         memset(&params, 0, sizeof(params));
5026
5027         if (info->attrs[NL80211_ATTR_MAC])
5028                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
5029
5030         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5031             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5032             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5033             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5034                 return -EINVAL;
5035
5036         if (!rdev->ops->del_station)
5037                 return -EOPNOTSUPP;
5038
5039         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
5040                 params.subtype =
5041                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
5042                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
5043                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
5044                         return -EINVAL;
5045         } else {
5046                 /* Default to Deauthentication frame */
5047                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
5048         }
5049
5050         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
5051                 params.reason_code =
5052                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5053                 if (params.reason_code == 0)
5054                         return -EINVAL; /* 0 is reserved */
5055         } else {
5056                 /* Default to reason code 2 */
5057                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
5058         }
5059
5060         return rdev_del_station(rdev, dev, &params);
5061 }
5062
5063 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
5064                                 int flags, struct net_device *dev,
5065                                 u8 *dst, u8 *next_hop,
5066                                 struct mpath_info *pinfo)
5067 {
5068         void *hdr;
5069         struct nlattr *pinfoattr;
5070
5071         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
5072         if (!hdr)
5073                 return -1;
5074
5075         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5076             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
5077             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
5078             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
5079                 goto nla_put_failure;
5080
5081         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
5082         if (!pinfoattr)
5083                 goto nla_put_failure;
5084         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
5085             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
5086                         pinfo->frame_qlen))
5087                 goto nla_put_failure;
5088         if (((pinfo->filled & MPATH_INFO_SN) &&
5089              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
5090             ((pinfo->filled & MPATH_INFO_METRIC) &&
5091              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
5092                          pinfo->metric)) ||
5093             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
5094              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
5095                          pinfo->exptime)) ||
5096             ((pinfo->filled & MPATH_INFO_FLAGS) &&
5097              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
5098                         pinfo->flags)) ||
5099             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
5100              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
5101                          pinfo->discovery_timeout)) ||
5102             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
5103              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
5104                         pinfo->discovery_retries)))
5105                 goto nla_put_failure;
5106
5107         nla_nest_end(msg, pinfoattr);
5108
5109         genlmsg_end(msg, hdr);
5110         return 0;
5111
5112  nla_put_failure:
5113         genlmsg_cancel(msg, hdr);
5114         return -EMSGSIZE;
5115 }
5116
5117 static int nl80211_dump_mpath(struct sk_buff *skb,
5118                               struct netlink_callback *cb)
5119 {
5120         struct mpath_info pinfo;
5121         struct cfg80211_registered_device *rdev;
5122         struct wireless_dev *wdev;
5123         u8 dst[ETH_ALEN];
5124         u8 next_hop[ETH_ALEN];
5125         int path_idx = cb->args[2];
5126         int err;
5127
5128         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5129         if (err)
5130                 return err;
5131
5132         if (!rdev->ops->dump_mpath) {
5133                 err = -EOPNOTSUPP;
5134                 goto out_err;
5135         }
5136
5137         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5138                 err = -EOPNOTSUPP;
5139                 goto out_err;
5140         }
5141
5142         while (1) {
5143                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
5144                                       next_hop, &pinfo);
5145                 if (err == -ENOENT)
5146                         break;
5147                 if (err)
5148                         goto out_err;
5149
5150                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5151                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5152                                        wdev->netdev, dst, next_hop,
5153                                        &pinfo) < 0)
5154                         goto out;
5155
5156                 path_idx++;
5157         }
5158
5159  out:
5160         cb->args[2] = path_idx;
5161         err = skb->len;
5162  out_err:
5163         nl80211_finish_wdev_dump(rdev);
5164         return err;
5165 }
5166
5167 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
5168 {
5169         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5170         int err;
5171         struct net_device *dev = info->user_ptr[1];
5172         struct mpath_info pinfo;
5173         struct sk_buff *msg;
5174         u8 *dst = NULL;
5175         u8 next_hop[ETH_ALEN];
5176
5177         memset(&pinfo, 0, sizeof(pinfo));
5178
5179         if (!info->attrs[NL80211_ATTR_MAC])
5180                 return -EINVAL;
5181
5182         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5183
5184         if (!rdev->ops->get_mpath)
5185                 return -EOPNOTSUPP;
5186
5187         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5188                 return -EOPNOTSUPP;
5189
5190         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
5191         if (err)
5192                 return err;
5193
5194         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5195         if (!msg)
5196                 return -ENOMEM;
5197
5198         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5199                                  dev, dst, next_hop, &pinfo) < 0) {
5200                 nlmsg_free(msg);
5201                 return -ENOBUFS;
5202         }
5203
5204         return genlmsg_reply(msg, info);
5205 }
5206
5207 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
5208 {
5209         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5210         struct net_device *dev = info->user_ptr[1];
5211         u8 *dst = NULL;
5212         u8 *next_hop = NULL;
5213
5214         if (!info->attrs[NL80211_ATTR_MAC])
5215                 return -EINVAL;
5216
5217         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5218                 return -EINVAL;
5219
5220         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5221         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5222
5223         if (!rdev->ops->change_mpath)
5224                 return -EOPNOTSUPP;
5225
5226         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5227                 return -EOPNOTSUPP;
5228
5229         return rdev_change_mpath(rdev, dev, dst, next_hop);
5230 }
5231
5232 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
5233 {
5234         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5235         struct net_device *dev = info->user_ptr[1];
5236         u8 *dst = NULL;
5237         u8 *next_hop = NULL;
5238
5239         if (!info->attrs[NL80211_ATTR_MAC])
5240                 return -EINVAL;
5241
5242         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5243                 return -EINVAL;
5244
5245         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5246         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5247
5248         if (!rdev->ops->add_mpath)
5249                 return -EOPNOTSUPP;
5250
5251         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5252                 return -EOPNOTSUPP;
5253
5254         return rdev_add_mpath(rdev, dev, dst, next_hop);
5255 }
5256
5257 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
5258 {
5259         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5260         struct net_device *dev = info->user_ptr[1];
5261         u8 *dst = NULL;
5262
5263         if (info->attrs[NL80211_ATTR_MAC])
5264                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5265
5266         if (!rdev->ops->del_mpath)
5267                 return -EOPNOTSUPP;
5268
5269         return rdev_del_mpath(rdev, dev, dst);
5270 }
5271
5272 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
5273 {
5274         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5275         int err;
5276         struct net_device *dev = info->user_ptr[1];
5277         struct mpath_info pinfo;
5278         struct sk_buff *msg;
5279         u8 *dst = NULL;
5280         u8 mpp[ETH_ALEN];
5281
5282         memset(&pinfo, 0, sizeof(pinfo));
5283
5284         if (!info->attrs[NL80211_ATTR_MAC])
5285                 return -EINVAL;
5286
5287         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5288
5289         if (!rdev->ops->get_mpp)
5290                 return -EOPNOTSUPP;
5291
5292         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5293                 return -EOPNOTSUPP;
5294
5295         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
5296         if (err)
5297                 return err;
5298
5299         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5300         if (!msg)
5301                 return -ENOMEM;
5302
5303         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5304                                dev, dst, mpp, &pinfo) < 0) {
5305                 nlmsg_free(msg);
5306                 return -ENOBUFS;
5307         }
5308
5309         return genlmsg_reply(msg, info);
5310 }
5311
5312 static int nl80211_dump_mpp(struct sk_buff *skb,
5313                             struct netlink_callback *cb)
5314 {
5315         struct mpath_info pinfo;
5316         struct cfg80211_registered_device *rdev;
5317         struct wireless_dev *wdev;
5318         u8 dst[ETH_ALEN];
5319         u8 mpp[ETH_ALEN];
5320         int path_idx = cb->args[2];
5321         int err;
5322
5323         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5324         if (err)
5325                 return err;
5326
5327         if (!rdev->ops->dump_mpp) {
5328                 err = -EOPNOTSUPP;
5329                 goto out_err;
5330         }
5331
5332         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5333                 err = -EOPNOTSUPP;
5334                 goto out_err;
5335         }
5336
5337         while (1) {
5338                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5339                                     mpp, &pinfo);
5340                 if (err == -ENOENT)
5341                         break;
5342                 if (err)
5343                         goto out_err;
5344
5345                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5346                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5347                                        wdev->netdev, dst, mpp,
5348                                        &pinfo) < 0)
5349                         goto out;
5350
5351                 path_idx++;
5352         }
5353
5354  out:
5355         cb->args[2] = path_idx;
5356         err = skb->len;
5357  out_err:
5358         nl80211_finish_wdev_dump(rdev);
5359         return err;
5360 }
5361
5362 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5363 {
5364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5365         struct net_device *dev = info->user_ptr[1];
5366         struct wireless_dev *wdev = dev->ieee80211_ptr;
5367         struct bss_parameters params;
5368         int err;
5369
5370         memset(&params, 0, sizeof(params));
5371         /* default to not changing parameters */
5372         params.use_cts_prot = -1;
5373         params.use_short_preamble = -1;
5374         params.use_short_slot_time = -1;
5375         params.ap_isolate = -1;
5376         params.ht_opmode = -1;
5377         params.p2p_ctwindow = -1;
5378         params.p2p_opp_ps = -1;
5379
5380         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5381                 params.use_cts_prot =
5382                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5383         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5384                 params.use_short_preamble =
5385                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5386         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5387                 params.use_short_slot_time =
5388                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5389         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5390                 params.basic_rates =
5391                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5392                 params.basic_rates_len =
5393                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5394         }
5395         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5396                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5397         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5398                 params.ht_opmode =
5399                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5400
5401         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5402                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5403                         return -EINVAL;
5404                 params.p2p_ctwindow =
5405                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5406                 if (params.p2p_ctwindow < 0)
5407                         return -EINVAL;
5408                 if (params.p2p_ctwindow != 0 &&
5409                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5410                         return -EINVAL;
5411         }
5412
5413         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5414                 u8 tmp;
5415
5416                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5417                         return -EINVAL;
5418                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5419                 if (tmp > 1)
5420                         return -EINVAL;
5421                 params.p2p_opp_ps = tmp;
5422                 if (params.p2p_opp_ps &&
5423                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5424                         return -EINVAL;
5425         }
5426
5427         if (!rdev->ops->change_bss)
5428                 return -EOPNOTSUPP;
5429
5430         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5431             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5432                 return -EOPNOTSUPP;
5433
5434         wdev_lock(wdev);
5435         err = rdev_change_bss(rdev, dev, &params);
5436         wdev_unlock(wdev);
5437
5438         return err;
5439 }
5440
5441 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5442 {
5443         char *data = NULL;
5444         bool is_indoor;
5445         enum nl80211_user_reg_hint_type user_reg_hint_type;
5446         u32 owner_nlportid;
5447
5448         /*
5449          * You should only get this when cfg80211 hasn't yet initialized
5450          * completely when built-in to the kernel right between the time
5451          * window between nl80211_init() and regulatory_init(), if that is
5452          * even possible.
5453          */
5454         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5455                 return -EINPROGRESS;
5456
5457         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5458                 user_reg_hint_type =
5459                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5460         else
5461                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5462
5463         switch (user_reg_hint_type) {
5464         case NL80211_USER_REG_HINT_USER:
5465         case NL80211_USER_REG_HINT_CELL_BASE:
5466                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5467                         return -EINVAL;
5468
5469                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5470                 return regulatory_hint_user(data, user_reg_hint_type);
5471         case NL80211_USER_REG_HINT_INDOOR:
5472                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5473                         owner_nlportid = info->snd_portid;
5474                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5475                 } else {
5476                         owner_nlportid = 0;
5477                         is_indoor = true;
5478                 }
5479
5480                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5481         default:
5482                 return -EINVAL;
5483         }
5484 }
5485
5486 static int nl80211_get_mesh_config(struct sk_buff *skb,
5487                                    struct genl_info *info)
5488 {
5489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5490         struct net_device *dev = info->user_ptr[1];
5491         struct wireless_dev *wdev = dev->ieee80211_ptr;
5492         struct mesh_config cur_params;
5493         int err = 0;
5494         void *hdr;
5495         struct nlattr *pinfoattr;
5496         struct sk_buff *msg;
5497
5498         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5499                 return -EOPNOTSUPP;
5500
5501         if (!rdev->ops->get_mesh_config)
5502                 return -EOPNOTSUPP;
5503
5504         wdev_lock(wdev);
5505         /* If not connected, get default parameters */
5506         if (!wdev->mesh_id_len)
5507                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5508         else
5509                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5510         wdev_unlock(wdev);
5511
5512         if (err)
5513                 return err;
5514
5515         /* Draw up a netlink message to send back */
5516         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5517         if (!msg)
5518                 return -ENOMEM;
5519         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5520                              NL80211_CMD_GET_MESH_CONFIG);
5521         if (!hdr)
5522                 goto out;
5523         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5524         if (!pinfoattr)
5525                 goto nla_put_failure;
5526         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5527             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5528                         cur_params.dot11MeshRetryTimeout) ||
5529             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5530                         cur_params.dot11MeshConfirmTimeout) ||
5531             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5532                         cur_params.dot11MeshHoldingTimeout) ||
5533             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5534                         cur_params.dot11MeshMaxPeerLinks) ||
5535             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5536                        cur_params.dot11MeshMaxRetries) ||
5537             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5538                        cur_params.dot11MeshTTL) ||
5539             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5540                        cur_params.element_ttl) ||
5541             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5542                        cur_params.auto_open_plinks) ||
5543             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5544                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5545             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5546                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5547             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5548                         cur_params.path_refresh_time) ||
5549             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5550                         cur_params.min_discovery_timeout) ||
5551             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5552                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5553             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5554                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5555             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5556                         cur_params.dot11MeshHWMPperrMinInterval) ||
5557             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5558                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5559             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5560                        cur_params.dot11MeshHWMPRootMode) ||
5561             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5562                         cur_params.dot11MeshHWMPRannInterval) ||
5563             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5564                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5565             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5566                        cur_params.dot11MeshForwarding) ||
5567             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5568                         cur_params.rssi_threshold) ||
5569             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5570                         cur_params.ht_opmode) ||
5571             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5572                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5573             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5574                         cur_params.dot11MeshHWMProotInterval) ||
5575             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5576                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5577             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5578                         cur_params.power_mode) ||
5579             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5580                         cur_params.dot11MeshAwakeWindowDuration) ||
5581             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5582                         cur_params.plink_timeout))
5583                 goto nla_put_failure;
5584         nla_nest_end(msg, pinfoattr);
5585         genlmsg_end(msg, hdr);
5586         return genlmsg_reply(msg, info);
5587
5588  nla_put_failure:
5589         genlmsg_cancel(msg, hdr);
5590  out:
5591         nlmsg_free(msg);
5592         return -ENOBUFS;
5593 }
5594
5595 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5596         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5597         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5598         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5599         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5600         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5601         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5602         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5603         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5604         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5605         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5606         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5607         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5608         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5609         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5610         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5611         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5612         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5613         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5614         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5615         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5616         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5617         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5618         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5619         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5620         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5621         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5622         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5623         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5624 };
5625
5626 static const struct nla_policy
5627         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5628         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5629         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5630         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5631         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5632         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5633         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5634         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5635                                     .len = IEEE80211_MAX_DATA_LEN },
5636         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5637 };
5638
5639 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5640 {
5641         u8 val = nla_get_u8(nla);
5642         if (val < min || val > max)
5643                 return -EINVAL;
5644         *out = val;
5645         return 0;
5646 }
5647
5648 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5649 {
5650         u8 val = nla_get_u8(nla);
5651         if (val < min || val > max)
5652                 return -EINVAL;
5653         *out = val;
5654         return 0;
5655 }
5656
5657 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5658 {
5659         u16 val = nla_get_u16(nla);
5660         if (val < min || val > max)
5661                 return -EINVAL;
5662         *out = val;
5663         return 0;
5664 }
5665
5666 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5667 {
5668         u32 val = nla_get_u32(nla);
5669         if (val < min || val > max)
5670                 return -EINVAL;
5671         *out = val;
5672         return 0;
5673 }
5674
5675 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5676 {
5677         s32 val = nla_get_s32(nla);
5678         if (val < min || val > max)
5679                 return -EINVAL;
5680         *out = val;
5681         return 0;
5682 }
5683
5684 static int nl80211_check_power_mode(const struct nlattr *nla,
5685                                     enum nl80211_mesh_power_mode min,
5686                                     enum nl80211_mesh_power_mode max,
5687                                     enum nl80211_mesh_power_mode *out)
5688 {
5689         u32 val = nla_get_u32(nla);
5690         if (val < min || val > max)
5691                 return -EINVAL;
5692         *out = val;
5693         return 0;
5694 }
5695
5696 static int nl80211_parse_mesh_config(struct genl_info *info,
5697                                      struct mesh_config *cfg,
5698                                      u32 *mask_out)
5699 {
5700         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5701         u32 mask = 0;
5702         u16 ht_opmode;
5703
5704 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5705 do {                                                                        \
5706         if (tb[attr]) {                                                     \
5707                 if (fn(tb[attr], min, max, &cfg->param))                    \
5708                         return -EINVAL;                                     \
5709                 mask |= (1 << (attr - 1));                                  \
5710         }                                                                   \
5711 } while (0)
5712
5713         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5714                 return -EINVAL;
5715         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5716                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5717                              nl80211_meshconf_params_policy))
5718                 return -EINVAL;
5719
5720         /* This makes sure that there aren't more than 32 mesh config
5721          * parameters (otherwise our bitfield scheme would not work.) */
5722         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5723
5724         /* Fill in the params struct */
5725         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5726                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5727                                   nl80211_check_u16);
5728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5729                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5730                                   nl80211_check_u16);
5731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5732                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5733                                   nl80211_check_u16);
5734         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5735                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5736                                   nl80211_check_u16);
5737         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5738                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5739                                   nl80211_check_u8);
5740         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5741                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5742         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5743                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5744                                   nl80211_check_u8);
5745         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5746                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5747                                   nl80211_check_bool);
5748         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5749                                   1, 255, mask,
5750                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5751                                   nl80211_check_u32);
5752         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5753                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5754                                   nl80211_check_u8);
5755         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5756                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5757                                   nl80211_check_u32);
5758         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5759                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5760                                   nl80211_check_u16);
5761         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5762                                   1, 65535, mask,
5763                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5764                                   nl80211_check_u32);
5765         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5766                                   1, 65535, mask,
5767                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5768                                   nl80211_check_u16);
5769         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5770                                   1, 65535, mask,
5771                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5772                                   nl80211_check_u16);
5773         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5774                                   dot11MeshHWMPnetDiameterTraversalTime,
5775                                   1, 65535, mask,
5776                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5777                                   nl80211_check_u16);
5778         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5779                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5780                                   nl80211_check_u8);
5781         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5782                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5783                                   nl80211_check_u16);
5784         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5785                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5786                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5787                                   nl80211_check_bool);
5788         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5789                                   mask, NL80211_MESHCONF_FORWARDING,
5790                                   nl80211_check_bool);
5791         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5792                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5793                                   nl80211_check_s32);
5794         /*
5795          * Check HT operation mode based on
5796          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5797          */
5798         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5799                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5800
5801                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5802                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5803                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5804                         return -EINVAL;
5805
5806                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5807                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5808                         return -EINVAL;
5809
5810                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5811                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5812                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5813                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
5814                                 return -EINVAL;
5815                         break;
5816                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
5817                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
5818                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5819                                 return -EINVAL;
5820                         break;
5821                 }
5822                 cfg->ht_opmode = ht_opmode;
5823         }
5824         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5825                                   1, 65535, mask,
5826                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5827                                   nl80211_check_u32);
5828         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5829                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5830                                   nl80211_check_u16);
5831         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5832                                   dot11MeshHWMPconfirmationInterval,
5833                                   1, 65535, mask,
5834                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5835                                   nl80211_check_u16);
5836         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5837                                   NL80211_MESH_POWER_ACTIVE,
5838                                   NL80211_MESH_POWER_MAX,
5839                                   mask, NL80211_MESHCONF_POWER_MODE,
5840                                   nl80211_check_power_mode);
5841         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5842                                   0, 65535, mask,
5843                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5844         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5845                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5846                                   nl80211_check_u32);
5847         if (mask_out)
5848                 *mask_out = mask;
5849
5850         return 0;
5851
5852 #undef FILL_IN_MESH_PARAM_IF_SET
5853 }
5854
5855 static int nl80211_parse_mesh_setup(struct genl_info *info,
5856                                      struct mesh_setup *setup)
5857 {
5858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5859         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5860
5861         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5862                 return -EINVAL;
5863         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5864                              info->attrs[NL80211_ATTR_MESH_SETUP],
5865                              nl80211_mesh_setup_params_policy))
5866                 return -EINVAL;
5867
5868         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5869                 setup->sync_method =
5870                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5871                  IEEE80211_SYNC_METHOD_VENDOR :
5872                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5873
5874         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5875                 setup->path_sel_proto =
5876                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5877                  IEEE80211_PATH_PROTOCOL_VENDOR :
5878                  IEEE80211_PATH_PROTOCOL_HWMP;
5879
5880         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5881                 setup->path_metric =
5882                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5883                  IEEE80211_PATH_METRIC_VENDOR :
5884                  IEEE80211_PATH_METRIC_AIRTIME;
5885
5886         if (tb[NL80211_MESH_SETUP_IE]) {
5887                 struct nlattr *ieattr =
5888                         tb[NL80211_MESH_SETUP_IE];
5889                 if (!is_valid_ie_attr(ieattr))
5890                         return -EINVAL;
5891                 setup->ie = nla_data(ieattr);
5892                 setup->ie_len = nla_len(ieattr);
5893         }
5894         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5895             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5896                 return -EINVAL;
5897         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5898         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5899         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5900         if (setup->is_secure)
5901                 setup->user_mpm = true;
5902
5903         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5904                 if (!setup->user_mpm)
5905                         return -EINVAL;
5906                 setup->auth_id =
5907                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5908         }
5909
5910         return 0;
5911 }
5912
5913 static int nl80211_update_mesh_config(struct sk_buff *skb,
5914                                       struct genl_info *info)
5915 {
5916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5917         struct net_device *dev = info->user_ptr[1];
5918         struct wireless_dev *wdev = dev->ieee80211_ptr;
5919         struct mesh_config cfg;
5920         u32 mask;
5921         int err;
5922
5923         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5924                 return -EOPNOTSUPP;
5925
5926         if (!rdev->ops->update_mesh_config)
5927                 return -EOPNOTSUPP;
5928
5929         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5930         if (err)
5931                 return err;
5932
5933         wdev_lock(wdev);
5934         if (!wdev->mesh_id_len)
5935                 err = -ENOLINK;
5936
5937         if (!err)
5938                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5939
5940         wdev_unlock(wdev);
5941
5942         return err;
5943 }
5944
5945 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5946                               struct sk_buff *msg)
5947 {
5948         struct nlattr *nl_reg_rules;
5949         unsigned int i;
5950
5951         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5952             (regdom->dfs_region &&
5953              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5954                 goto nla_put_failure;
5955
5956         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5957         if (!nl_reg_rules)
5958                 goto nla_put_failure;
5959
5960         for (i = 0; i < regdom->n_reg_rules; i++) {
5961                 struct nlattr *nl_reg_rule;
5962                 const struct ieee80211_reg_rule *reg_rule;
5963                 const struct ieee80211_freq_range *freq_range;
5964                 const struct ieee80211_power_rule *power_rule;
5965                 unsigned int max_bandwidth_khz;
5966
5967                 reg_rule = &regdom->reg_rules[i];
5968                 freq_range = &reg_rule->freq_range;
5969                 power_rule = &reg_rule->power_rule;
5970
5971                 nl_reg_rule = nla_nest_start(msg, i);
5972                 if (!nl_reg_rule)
5973                         goto nla_put_failure;
5974
5975                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5976                 if (!max_bandwidth_khz)
5977                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5978                                                                   reg_rule);
5979
5980                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5981                                 reg_rule->flags) ||
5982                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5983                                 freq_range->start_freq_khz) ||
5984                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5985                                 freq_range->end_freq_khz) ||
5986                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5987                                 max_bandwidth_khz) ||
5988                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5989                                 power_rule->max_antenna_gain) ||
5990                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5991                                 power_rule->max_eirp) ||
5992                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5993                                 reg_rule->dfs_cac_ms))
5994                         goto nla_put_failure;
5995
5996                 nla_nest_end(msg, nl_reg_rule);
5997         }
5998
5999         nla_nest_end(msg, nl_reg_rules);
6000         return 0;
6001
6002 nla_put_failure:
6003         return -EMSGSIZE;
6004 }
6005
6006 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
6007 {
6008         const struct ieee80211_regdomain *regdom = NULL;
6009         struct cfg80211_registered_device *rdev;
6010         struct wiphy *wiphy = NULL;
6011         struct sk_buff *msg;
6012         void *hdr;
6013
6014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6015         if (!msg)
6016                 return -ENOBUFS;
6017
6018         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6019                              NL80211_CMD_GET_REG);
6020         if (!hdr)
6021                 goto put_failure;
6022
6023         if (info->attrs[NL80211_ATTR_WIPHY]) {
6024                 bool self_managed;
6025
6026                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6027                 if (IS_ERR(rdev)) {
6028                         nlmsg_free(msg);
6029                         return PTR_ERR(rdev);
6030                 }
6031
6032                 wiphy = &rdev->wiphy;
6033                 self_managed = wiphy->regulatory_flags &
6034                                REGULATORY_WIPHY_SELF_MANAGED;
6035                 regdom = get_wiphy_regdom(wiphy);
6036
6037                 /* a self-managed-reg device must have a private regdom */
6038                 if (WARN_ON(!regdom && self_managed)) {
6039                         nlmsg_free(msg);
6040                         return -EINVAL;
6041                 }
6042
6043                 if (regdom &&
6044                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6045                         goto nla_put_failure;
6046         }
6047
6048         if (!wiphy && reg_last_request_cell_base() &&
6049             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6050                         NL80211_USER_REG_HINT_CELL_BASE))
6051                 goto nla_put_failure;
6052
6053         rcu_read_lock();
6054
6055         if (!regdom)
6056                 regdom = rcu_dereference(cfg80211_regdomain);
6057
6058         if (nl80211_put_regdom(regdom, msg))
6059                 goto nla_put_failure_rcu;
6060
6061         rcu_read_unlock();
6062
6063         genlmsg_end(msg, hdr);
6064         return genlmsg_reply(msg, info);
6065
6066 nla_put_failure_rcu:
6067         rcu_read_unlock();
6068 nla_put_failure:
6069         genlmsg_cancel(msg, hdr);
6070 put_failure:
6071         nlmsg_free(msg);
6072         return -EMSGSIZE;
6073 }
6074
6075 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
6076                                u32 seq, int flags, struct wiphy *wiphy,
6077                                const struct ieee80211_regdomain *regdom)
6078 {
6079         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6080                                    NL80211_CMD_GET_REG);
6081
6082         if (!hdr)
6083                 return -1;
6084
6085         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6086
6087         if (nl80211_put_regdom(regdom, msg))
6088                 goto nla_put_failure;
6089
6090         if (!wiphy && reg_last_request_cell_base() &&
6091             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6092                         NL80211_USER_REG_HINT_CELL_BASE))
6093                 goto nla_put_failure;
6094
6095         if (wiphy &&
6096             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6097                 goto nla_put_failure;
6098
6099         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
6100             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
6101                 goto nla_put_failure;
6102
6103         genlmsg_end(msg, hdr);
6104         return 0;
6105
6106 nla_put_failure:
6107         genlmsg_cancel(msg, hdr);
6108         return -EMSGSIZE;
6109 }
6110
6111 static int nl80211_get_reg_dump(struct sk_buff *skb,
6112                                 struct netlink_callback *cb)
6113 {
6114         const struct ieee80211_regdomain *regdom = NULL;
6115         struct cfg80211_registered_device *rdev;
6116         int err, reg_idx, start = cb->args[2];
6117
6118         rtnl_lock();
6119
6120         if (cfg80211_regdomain && start == 0) {
6121                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6122                                           NLM_F_MULTI, NULL,
6123                                           rtnl_dereference(cfg80211_regdomain));
6124                 if (err < 0)
6125                         goto out_err;
6126         }
6127
6128         /* the global regdom is idx 0 */
6129         reg_idx = 1;
6130         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
6131                 regdom = get_wiphy_regdom(&rdev->wiphy);
6132                 if (!regdom)
6133                         continue;
6134
6135                 if (++reg_idx <= start)
6136                         continue;
6137
6138                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6139                                           NLM_F_MULTI, &rdev->wiphy, regdom);
6140                 if (err < 0) {
6141                         reg_idx--;
6142                         break;
6143                 }
6144         }
6145
6146         cb->args[2] = reg_idx;
6147         err = skb->len;
6148 out_err:
6149         rtnl_unlock();
6150         return err;
6151 }
6152
6153 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
6154 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
6155         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
6156         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
6157         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
6158         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
6159         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
6160         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
6161         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
6162 };
6163
6164 static int parse_reg_rule(struct nlattr *tb[],
6165         struct ieee80211_reg_rule *reg_rule)
6166 {
6167         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
6168         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
6169
6170         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
6171                 return -EINVAL;
6172         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
6173                 return -EINVAL;
6174         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
6175                 return -EINVAL;
6176         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
6177                 return -EINVAL;
6178         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
6179                 return -EINVAL;
6180
6181         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
6182
6183         freq_range->start_freq_khz =
6184                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
6185         freq_range->end_freq_khz =
6186                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
6187         freq_range->max_bandwidth_khz =
6188                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
6189
6190         power_rule->max_eirp =
6191                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
6192
6193         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
6194                 power_rule->max_antenna_gain =
6195                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
6196
6197         if (tb[NL80211_ATTR_DFS_CAC_TIME])
6198                 reg_rule->dfs_cac_ms =
6199                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
6200
6201         return 0;
6202 }
6203
6204 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
6205 {
6206         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
6207         struct nlattr *nl_reg_rule;
6208         char *alpha2;
6209         int rem_reg_rules, r;
6210         u32 num_rules = 0, rule_idx = 0, size_of_regd;
6211         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
6212         struct ieee80211_regdomain *rd;
6213
6214         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
6215                 return -EINVAL;
6216
6217         if (!info->attrs[NL80211_ATTR_REG_RULES])
6218                 return -EINVAL;
6219
6220         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
6221
6222         if (info->attrs[NL80211_ATTR_DFS_REGION])
6223                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
6224
6225         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6226                             rem_reg_rules) {
6227                 num_rules++;
6228                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
6229                         return -EINVAL;
6230         }
6231
6232         if (!reg_is_valid_request(alpha2))
6233                 return -EINVAL;
6234
6235         size_of_regd = sizeof(struct ieee80211_regdomain) +
6236                        num_rules * sizeof(struct ieee80211_reg_rule);
6237
6238         rd = kzalloc(size_of_regd, GFP_KERNEL);
6239         if (!rd)
6240                 return -ENOMEM;
6241
6242         rd->n_reg_rules = num_rules;
6243         rd->alpha2[0] = alpha2[0];
6244         rd->alpha2[1] = alpha2[1];
6245
6246         /*
6247          * Disable DFS master mode if the DFS region was
6248          * not supported or known on this kernel.
6249          */
6250         if (reg_supported_dfs_region(dfs_region))
6251                 rd->dfs_region = dfs_region;
6252
6253         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6254                             rem_reg_rules) {
6255                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
6256                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
6257                               reg_rule_policy);
6258                 if (r)
6259                         goto bad_reg;
6260                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
6261                 if (r)
6262                         goto bad_reg;
6263
6264                 rule_idx++;
6265
6266                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
6267                         r = -EINVAL;
6268                         goto bad_reg;
6269                 }
6270         }
6271
6272         /* set_regdom takes ownership of rd */
6273         return set_regdom(rd, REGD_SOURCE_CRDA);
6274  bad_reg:
6275         kfree(rd);
6276         return r;
6277 }
6278 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
6279
6280 static int validate_scan_freqs(struct nlattr *freqs)
6281 {
6282         struct nlattr *attr1, *attr2;
6283         int n_channels = 0, tmp1, tmp2;
6284
6285         nla_for_each_nested(attr1, freqs, tmp1) {
6286                 n_channels++;
6287                 /*
6288                  * Some hardware has a limited channel list for
6289                  * scanning, and it is pretty much nonsensical
6290                  * to scan for a channel twice, so disallow that
6291                  * and don't require drivers to check that the
6292                  * channel list they get isn't longer than what
6293                  * they can scan, as long as they can scan all
6294                  * the channels they registered at once.
6295                  */
6296                 nla_for_each_nested(attr2, freqs, tmp2)
6297                         if (attr1 != attr2 &&
6298                             nla_get_u32(attr1) == nla_get_u32(attr2))
6299                                 return 0;
6300         }
6301
6302         return n_channels;
6303 }
6304
6305 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
6306 {
6307         return b < NUM_NL80211_BANDS && wiphy->bands[b];
6308 }
6309
6310 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
6311                             struct cfg80211_bss_selection *bss_select)
6312 {
6313         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
6314         struct nlattr *nest;
6315         int err;
6316         bool found = false;
6317         int i;
6318
6319         /* only process one nested attribute */
6320         nest = nla_data(nla);
6321         if (!nla_ok(nest, nla_len(nest)))
6322                 return -EINVAL;
6323
6324         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
6325                         nla_len(nest), nl80211_bss_select_policy);
6326         if (err)
6327                 return err;
6328
6329         /* only one attribute may be given */
6330         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6331                 if (attr[i]) {
6332                         if (found)
6333                                 return -EINVAL;
6334                         found = true;
6335                 }
6336         }
6337
6338         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6339
6340         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6341                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6342
6343         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6344                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6345                 bss_select->param.band_pref =
6346                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6347                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6348                         return -EINVAL;
6349         }
6350
6351         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6352                 struct nl80211_bss_select_rssi_adjust *adj_param;
6353
6354                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6355                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6356                 bss_select->param.adjust.band = adj_param->band;
6357                 bss_select->param.adjust.delta = adj_param->delta;
6358                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6359                         return -EINVAL;
6360         }
6361
6362         /* user-space did not provide behaviour attribute */
6363         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6364                 return -EINVAL;
6365
6366         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6367                 return -EINVAL;
6368
6369         return 0;
6370 }
6371
6372 static int nl80211_parse_random_mac(struct nlattr **attrs,
6373                                     u8 *mac_addr, u8 *mac_addr_mask)
6374 {
6375         int i;
6376
6377         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6378                 eth_zero_addr(mac_addr);
6379                 eth_zero_addr(mac_addr_mask);
6380                 mac_addr[0] = 0x2;
6381                 mac_addr_mask[0] = 0x3;
6382
6383                 return 0;
6384         }
6385
6386         /* need both or none */
6387         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6388                 return -EINVAL;
6389
6390         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6391         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6392
6393         /* don't allow or configure an mcast address */
6394         if (!is_multicast_ether_addr(mac_addr_mask) ||
6395             is_multicast_ether_addr(mac_addr))
6396                 return -EINVAL;
6397
6398         /*
6399          * allow users to pass a MAC address that has bits set outside
6400          * of the mask, but don't bother drivers with having to deal
6401          * with such bits
6402          */
6403         for (i = 0; i < ETH_ALEN; i++)
6404                 mac_addr[i] &= mac_addr_mask[i];
6405
6406         return 0;
6407 }
6408
6409 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6410 {
6411         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6412         struct wireless_dev *wdev = info->user_ptr[1];
6413         struct cfg80211_scan_request *request;
6414         struct nlattr *attr;
6415         struct wiphy *wiphy;
6416         int err, tmp, n_ssids = 0, n_channels, i;
6417         size_t ie_len;
6418
6419         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6420                 return -EINVAL;
6421
6422         wiphy = &rdev->wiphy;
6423
6424         if (!rdev->ops->scan)
6425                 return -EOPNOTSUPP;
6426
6427         if (rdev->scan_req || rdev->scan_msg) {
6428                 err = -EBUSY;
6429                 goto unlock;
6430         }
6431
6432         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6433                 n_channels = validate_scan_freqs(
6434                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6435                 if (!n_channels) {
6436                         err = -EINVAL;
6437                         goto unlock;
6438                 }
6439         } else {
6440                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6441         }
6442
6443         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6444                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6445                         n_ssids++;
6446
6447         if (n_ssids > wiphy->max_scan_ssids) {
6448                 err = -EINVAL;
6449                 goto unlock;
6450         }
6451
6452         if (info->attrs[NL80211_ATTR_IE])
6453                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6454         else
6455                 ie_len = 0;
6456
6457         if (ie_len > wiphy->max_scan_ie_len) {
6458                 err = -EINVAL;
6459                 goto unlock;
6460         }
6461
6462         request = kzalloc(sizeof(*request)
6463                         + sizeof(*request->ssids) * n_ssids
6464                         + sizeof(*request->channels) * n_channels
6465                         + ie_len, GFP_KERNEL);
6466         if (!request) {
6467                 err = -ENOMEM;
6468                 goto unlock;
6469         }
6470
6471         if (n_ssids)
6472                 request->ssids = (void *)&request->channels[n_channels];
6473         request->n_ssids = n_ssids;
6474         if (ie_len) {
6475                 if (n_ssids)
6476                         request->ie = (void *)(request->ssids + n_ssids);
6477                 else
6478                         request->ie = (void *)(request->channels + n_channels);
6479         }
6480
6481         i = 0;
6482         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6483                 /* user specified, bail out if channel not found */
6484                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6485                         struct ieee80211_channel *chan;
6486
6487                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6488
6489                         if (!chan) {
6490                                 err = -EINVAL;
6491                                 goto out_free;
6492                         }
6493
6494                         /* ignore disabled channels */
6495                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6496                                 continue;
6497
6498                         request->channels[i] = chan;
6499                         i++;
6500                 }
6501         } else {
6502                 enum nl80211_band band;
6503
6504                 /* all channels */
6505                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6506                         int j;
6507
6508                         if (!wiphy->bands[band])
6509                                 continue;
6510                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6511                                 struct ieee80211_channel *chan;
6512
6513                                 chan = &wiphy->bands[band]->channels[j];
6514
6515                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6516                                         continue;
6517
6518                                 request->channels[i] = chan;
6519                                 i++;
6520                         }
6521                 }
6522         }
6523
6524         if (!i) {
6525                 err = -EINVAL;
6526                 goto out_free;
6527         }
6528
6529         request->n_channels = i;
6530
6531         i = 0;
6532         if (n_ssids) {
6533                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6534                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6535                                 err = -EINVAL;
6536                                 goto out_free;
6537                         }
6538                         request->ssids[i].ssid_len = nla_len(attr);
6539                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6540                         i++;
6541                 }
6542         }
6543
6544         if (info->attrs[NL80211_ATTR_IE]) {
6545                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6546                 memcpy((void *)request->ie,
6547                        nla_data(info->attrs[NL80211_ATTR_IE]),
6548                        request->ie_len);
6549         }
6550
6551         for (i = 0; i < NUM_NL80211_BANDS; i++)
6552                 if (wiphy->bands[i])
6553                         request->rates[i] =
6554                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6555
6556         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6557                 nla_for_each_nested(attr,
6558                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6559                                     tmp) {
6560                         enum nl80211_band band = nla_type(attr);
6561
6562                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6563                                 err = -EINVAL;
6564                                 goto out_free;
6565                         }
6566
6567                         if (!wiphy->bands[band])
6568                                 continue;
6569
6570                         err = ieee80211_get_ratemask(wiphy->bands[band],
6571                                                      nla_data(attr),
6572                                                      nla_len(attr),
6573                                                      &request->rates[band]);
6574                         if (err)
6575                                 goto out_free;
6576                 }
6577         }
6578
6579         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6580                 if (!wiphy_ext_feature_isset(wiphy,
6581                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6582                         err = -EOPNOTSUPP;
6583                         goto out_free;
6584                 }
6585
6586                 request->duration =
6587                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6588                 request->duration_mandatory =
6589                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6590         }
6591
6592         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6593                 request->flags = nla_get_u32(
6594                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6595                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6596                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6597                         err = -EOPNOTSUPP;
6598                         goto out_free;
6599                 }
6600
6601                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6602                         if (!(wiphy->features &
6603                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6604                                 err = -EOPNOTSUPP;
6605                                 goto out_free;
6606                         }
6607
6608                         if (wdev->current_bss) {
6609                                 err = -EOPNOTSUPP;
6610                                 goto out_free;
6611                         }
6612
6613                         err = nl80211_parse_random_mac(info->attrs,
6614                                                        request->mac_addr,
6615                                                        request->mac_addr_mask);
6616                         if (err)
6617                                 goto out_free;
6618                 }
6619         }
6620
6621         request->no_cck =
6622                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6623
6624         if (info->attrs[NL80211_ATTR_MAC])
6625                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6626                        ETH_ALEN);
6627         else
6628                 eth_broadcast_addr(request->bssid);
6629
6630         request->wdev = wdev;
6631         request->wiphy = &rdev->wiphy;
6632         request->scan_start = jiffies;
6633
6634         rdev->scan_req = request;
6635         err = rdev_scan(rdev, request);
6636
6637         if (!err) {
6638                 nl80211_send_scan_start(rdev, wdev);
6639                 if (wdev->netdev)
6640                         dev_hold(wdev->netdev);
6641         } else {
6642  out_free:
6643                 rdev->scan_req = NULL;
6644                 kfree(request);
6645         }
6646
6647  unlock:
6648         return err;
6649 }
6650
6651 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6652 {
6653         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6654         struct wireless_dev *wdev = info->user_ptr[1];
6655
6656         if (!rdev->ops->abort_scan)
6657                 return -EOPNOTSUPP;
6658
6659         if (rdev->scan_msg)
6660                 return 0;
6661
6662         if (!rdev->scan_req)
6663                 return -ENOENT;
6664
6665         rdev_abort_scan(rdev, wdev);
6666         return 0;
6667 }
6668
6669 static int
6670 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6671                                struct cfg80211_sched_scan_request *request,
6672                                struct nlattr **attrs)
6673 {
6674         int tmp, err, i = 0;
6675         struct nlattr *attr;
6676
6677         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6678                 u32 interval;
6679
6680                 /*
6681                  * If scan plans are not specified,
6682                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6683                  * case one scan plan will be set with the specified scan
6684                  * interval and infinite number of iterations.
6685                  */
6686                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6687                         return -EINVAL;
6688
6689                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6690                 if (!interval)
6691                         return -EINVAL;
6692
6693                 request->scan_plans[0].interval =
6694                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6695                 if (!request->scan_plans[0].interval)
6696                         return -EINVAL;
6697
6698                 if (request->scan_plans[0].interval >
6699                     wiphy->max_sched_scan_plan_interval)
6700                         request->scan_plans[0].interval =
6701                                 wiphy->max_sched_scan_plan_interval;
6702
6703                 return 0;
6704         }
6705
6706         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6707                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6708
6709                 if (WARN_ON(i >= n_plans))
6710                         return -EINVAL;
6711
6712                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6713                                 nla_data(attr), nla_len(attr),
6714                                 nl80211_plan_policy);
6715                 if (err)
6716                         return err;
6717
6718                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6719                         return -EINVAL;
6720
6721                 request->scan_plans[i].interval =
6722                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6723                 if (!request->scan_plans[i].interval ||
6724                     request->scan_plans[i].interval >
6725                     wiphy->max_sched_scan_plan_interval)
6726                         return -EINVAL;
6727
6728                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6729                         request->scan_plans[i].iterations =
6730                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6731                         if (!request->scan_plans[i].iterations ||
6732                             (request->scan_plans[i].iterations >
6733                              wiphy->max_sched_scan_plan_iterations))
6734                                 return -EINVAL;
6735                 } else if (i < n_plans - 1) {
6736                         /*
6737                          * All scan plans but the last one must specify
6738                          * a finite number of iterations
6739                          */
6740                         return -EINVAL;
6741                 }
6742
6743                 i++;
6744         }
6745
6746         /*
6747          * The last scan plan must not specify the number of
6748          * iterations, it is supposed to run infinitely
6749          */
6750         if (request->scan_plans[n_plans - 1].iterations)
6751                 return  -EINVAL;
6752
6753         return 0;
6754 }
6755
6756 static struct cfg80211_sched_scan_request *
6757 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6758                          struct nlattr **attrs)
6759 {
6760         struct cfg80211_sched_scan_request *request;
6761         struct nlattr *attr;
6762         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6763         enum nl80211_band band;
6764         size_t ie_len;
6765         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6766         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6767
6768         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6769                 return ERR_PTR(-EINVAL);
6770
6771         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6772                 n_channels = validate_scan_freqs(
6773                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6774                 if (!n_channels)
6775                         return ERR_PTR(-EINVAL);
6776         } else {
6777                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6778         }
6779
6780         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6781                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6782                                     tmp)
6783                         n_ssids++;
6784
6785         if (n_ssids > wiphy->max_sched_scan_ssids)
6786                 return ERR_PTR(-EINVAL);
6787
6788         /*
6789          * First, count the number of 'real' matchsets. Due to an issue with
6790          * the old implementation, matchsets containing only the RSSI attribute
6791          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6792          * RSSI for all matchsets, rather than their own matchset for reporting
6793          * all APs with a strong RSSI. This is needed to be compatible with
6794          * older userspace that treated a matchset with only the RSSI as the
6795          * global RSSI for all other matchsets - if there are other matchsets.
6796          */
6797         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6798                 nla_for_each_nested(attr,
6799                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6800                                     tmp) {
6801                         struct nlattr *rssi;
6802
6803                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6804                                         nla_data(attr), nla_len(attr),
6805                                         nl80211_match_policy);
6806                         if (err)
6807                                 return ERR_PTR(err);
6808                         /* add other standalone attributes here */
6809                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6810                                 n_match_sets++;
6811                                 continue;
6812                         }
6813                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6814                         if (rssi)
6815                                 default_match_rssi = nla_get_s32(rssi);
6816                 }
6817         }
6818
6819         /* However, if there's no other matchset, add the RSSI one */
6820         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6821                 n_match_sets = 1;
6822
6823         if (n_match_sets > wiphy->max_match_sets)
6824                 return ERR_PTR(-EINVAL);
6825
6826         if (attrs[NL80211_ATTR_IE])
6827                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6828         else
6829                 ie_len = 0;
6830
6831         if (ie_len > wiphy->max_sched_scan_ie_len)
6832                 return ERR_PTR(-EINVAL);
6833
6834         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6835                 /*
6836                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6837                  * each scan plan already specifies its own interval
6838                  */
6839                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6840                         return ERR_PTR(-EINVAL);
6841
6842                 nla_for_each_nested(attr,
6843                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6844                         n_plans++;
6845         } else {
6846                 /*
6847                  * The scan interval attribute is kept for backward
6848                  * compatibility. If no scan plans are specified and sched scan
6849                  * interval is specified, one scan plan will be set with this
6850                  * scan interval and infinite number of iterations.
6851                  */
6852                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6853                         return ERR_PTR(-EINVAL);
6854
6855                 n_plans = 1;
6856         }
6857
6858         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6859                 return ERR_PTR(-EINVAL);
6860
6861         request = kzalloc(sizeof(*request)
6862                         + sizeof(*request->ssids) * n_ssids
6863                         + sizeof(*request->match_sets) * n_match_sets
6864                         + sizeof(*request->scan_plans) * n_plans
6865                         + sizeof(*request->channels) * n_channels
6866                         + ie_len, GFP_KERNEL);
6867         if (!request)
6868                 return ERR_PTR(-ENOMEM);
6869
6870         if (n_ssids)
6871                 request->ssids = (void *)&request->channels[n_channels];
6872         request->n_ssids = n_ssids;
6873         if (ie_len) {
6874                 if (n_ssids)
6875                         request->ie = (void *)(request->ssids + n_ssids);
6876                 else
6877                         request->ie = (void *)(request->channels + n_channels);
6878         }
6879
6880         if (n_match_sets) {
6881                 if (request->ie)
6882                         request->match_sets = (void *)(request->ie + ie_len);
6883                 else if (n_ssids)
6884                         request->match_sets =
6885                                 (void *)(request->ssids + n_ssids);
6886                 else
6887                         request->match_sets =
6888                                 (void *)(request->channels + n_channels);
6889         }
6890         request->n_match_sets = n_match_sets;
6891
6892         if (n_match_sets)
6893                 request->scan_plans = (void *)(request->match_sets +
6894                                                n_match_sets);
6895         else if (request->ie)
6896                 request->scan_plans = (void *)(request->ie + ie_len);
6897         else if (n_ssids)
6898                 request->scan_plans = (void *)(request->ssids + n_ssids);
6899         else
6900                 request->scan_plans = (void *)(request->channels + n_channels);
6901
6902         request->n_scan_plans = n_plans;
6903
6904         i = 0;
6905         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6906                 /* user specified, bail out if channel not found */
6907                 nla_for_each_nested(attr,
6908                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6909                                     tmp) {
6910                         struct ieee80211_channel *chan;
6911
6912                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6913
6914                         if (!chan) {
6915                                 err = -EINVAL;
6916                                 goto out_free;
6917                         }
6918
6919                         /* ignore disabled channels */
6920                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6921                                 continue;
6922
6923                         request->channels[i] = chan;
6924                         i++;
6925                 }
6926         } else {
6927                 /* all channels */
6928                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6929                         int j;
6930
6931                         if (!wiphy->bands[band])
6932                                 continue;
6933                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6934                                 struct ieee80211_channel *chan;
6935
6936                                 chan = &wiphy->bands[band]->channels[j];
6937
6938                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6939                                         continue;
6940
6941                                 request->channels[i] = chan;
6942                                 i++;
6943                         }
6944                 }
6945         }
6946
6947         if (!i) {
6948                 err = -EINVAL;
6949                 goto out_free;
6950         }
6951
6952         request->n_channels = i;
6953
6954         i = 0;
6955         if (n_ssids) {
6956                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6957                                     tmp) {
6958                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6959                                 err = -EINVAL;
6960                                 goto out_free;
6961                         }
6962                         request->ssids[i].ssid_len = nla_len(attr);
6963                         memcpy(request->ssids[i].ssid, nla_data(attr),
6964                                nla_len(attr));
6965                         i++;
6966                 }
6967         }
6968
6969         i = 0;
6970         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6971                 nla_for_each_nested(attr,
6972                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6973                                     tmp) {
6974                         struct nlattr *ssid, *rssi;
6975
6976                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6977                                         nla_data(attr), nla_len(attr),
6978                                         nl80211_match_policy);
6979                         if (err)
6980                                 goto out_free;
6981                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6982                         if (ssid) {
6983                                 if (WARN_ON(i >= n_match_sets)) {
6984                                         /* this indicates a programming error,
6985                                          * the loop above should have verified
6986                                          * things properly
6987                                          */
6988                                         err = -EINVAL;
6989                                         goto out_free;
6990                                 }
6991
6992                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6993                                         err = -EINVAL;
6994                                         goto out_free;
6995                                 }
6996                                 memcpy(request->match_sets[i].ssid.ssid,
6997                                        nla_data(ssid), nla_len(ssid));
6998                                 request->match_sets[i].ssid.ssid_len =
6999                                         nla_len(ssid);
7000                                 /* special attribute - old implementation w/a */
7001                                 request->match_sets[i].rssi_thold =
7002                                         default_match_rssi;
7003                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7004                                 if (rssi)
7005                                         request->match_sets[i].rssi_thold =
7006                                                 nla_get_s32(rssi);
7007                         }
7008                         i++;
7009                 }
7010
7011                 /* there was no other matchset, so the RSSI one is alone */
7012                 if (i == 0 && n_match_sets)
7013                         request->match_sets[0].rssi_thold = default_match_rssi;
7014
7015                 request->min_rssi_thold = INT_MAX;
7016                 for (i = 0; i < n_match_sets; i++)
7017                         request->min_rssi_thold =
7018                                 min(request->match_sets[i].rssi_thold,
7019                                     request->min_rssi_thold);
7020         } else {
7021                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
7022         }
7023
7024         if (ie_len) {
7025                 request->ie_len = ie_len;
7026                 memcpy((void *)request->ie,
7027                        nla_data(attrs[NL80211_ATTR_IE]),
7028                        request->ie_len);
7029         }
7030
7031         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
7032                 request->flags = nla_get_u32(
7033                         attrs[NL80211_ATTR_SCAN_FLAGS]);
7034                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
7035                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
7036                         err = -EOPNOTSUPP;
7037                         goto out_free;
7038                 }
7039
7040                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
7041                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
7042
7043                         if (!wdev) /* must be net-detect */
7044                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
7045
7046                         if (!(wiphy->features & flg)) {
7047                                 err = -EOPNOTSUPP;
7048                                 goto out_free;
7049                         }
7050
7051                         if (wdev && wdev->current_bss) {
7052                                 err = -EOPNOTSUPP;
7053                                 goto out_free;
7054                         }
7055
7056                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
7057                                                        request->mac_addr_mask);
7058                         if (err)
7059                                 goto out_free;
7060                 }
7061         }
7062
7063         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
7064                 request->delay =
7065                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
7066
7067         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
7068         if (err)
7069                 goto out_free;
7070
7071         request->scan_start = jiffies;
7072
7073         return request;
7074
7075 out_free:
7076         kfree(request);
7077         return ERR_PTR(err);
7078 }
7079
7080 static int nl80211_start_sched_scan(struct sk_buff *skb,
7081                                     struct genl_info *info)
7082 {
7083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7084         struct net_device *dev = info->user_ptr[1];
7085         struct wireless_dev *wdev = dev->ieee80211_ptr;
7086         struct cfg80211_sched_scan_request *sched_scan_req;
7087         int err;
7088
7089         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
7090             !rdev->ops->sched_scan_start)
7091                 return -EOPNOTSUPP;
7092
7093         if (rdev->sched_scan_req)
7094                 return -EINPROGRESS;
7095
7096         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
7097                                                   info->attrs);
7098
7099         err = PTR_ERR_OR_ZERO(sched_scan_req);
7100         if (err)
7101                 goto out_err;
7102
7103         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
7104         if (err)
7105                 goto out_free;
7106
7107         sched_scan_req->dev = dev;
7108         sched_scan_req->wiphy = &rdev->wiphy;
7109
7110         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
7111                 sched_scan_req->owner_nlportid = info->snd_portid;
7112
7113         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
7114
7115         nl80211_send_sched_scan(rdev, dev,
7116                                 NL80211_CMD_START_SCHED_SCAN);
7117         return 0;
7118
7119 out_free:
7120         kfree(sched_scan_req);
7121 out_err:
7122         return err;
7123 }
7124
7125 static int nl80211_stop_sched_scan(struct sk_buff *skb,
7126                                    struct genl_info *info)
7127 {
7128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7129
7130         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
7131             !rdev->ops->sched_scan_stop)
7132                 return -EOPNOTSUPP;
7133
7134         return __cfg80211_stop_sched_scan(rdev, false);
7135 }
7136
7137 static int nl80211_start_radar_detection(struct sk_buff *skb,
7138                                          struct genl_info *info)
7139 {
7140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7141         struct net_device *dev = info->user_ptr[1];
7142         struct wireless_dev *wdev = dev->ieee80211_ptr;
7143         struct cfg80211_chan_def chandef;
7144         enum nl80211_dfs_regions dfs_region;
7145         unsigned int cac_time_ms;
7146         int err;
7147
7148         dfs_region = reg_get_dfs_region(wdev->wiphy);
7149         if (dfs_region == NL80211_DFS_UNSET)
7150                 return -EINVAL;
7151
7152         err = nl80211_parse_chandef(rdev, info, &chandef);
7153         if (err)
7154                 return err;
7155
7156         if (netif_carrier_ok(dev))
7157                 return -EBUSY;
7158
7159         if (wdev->cac_started)
7160                 return -EBUSY;
7161
7162         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
7163                                             wdev->iftype);
7164         if (err < 0)
7165                 return err;
7166
7167         if (err == 0)
7168                 return -EINVAL;
7169
7170         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
7171                 return -EINVAL;
7172
7173         if (!rdev->ops->start_radar_detection)
7174                 return -EOPNOTSUPP;
7175
7176         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
7177         if (WARN_ON(!cac_time_ms))
7178                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
7179
7180         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
7181         if (!err) {
7182                 wdev->chandef = chandef;
7183                 wdev->cac_started = true;
7184                 wdev->cac_start_time = jiffies;
7185                 wdev->cac_time_ms = cac_time_ms;
7186         }
7187         return err;
7188 }
7189
7190 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
7191 {
7192         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7193         struct net_device *dev = info->user_ptr[1];
7194         struct wireless_dev *wdev = dev->ieee80211_ptr;
7195         struct cfg80211_csa_settings params;
7196         /* csa_attrs is defined static to avoid waste of stack size - this
7197          * function is called under RTNL lock, so this should not be a problem.
7198          */
7199         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
7200         int err;
7201         bool need_new_beacon = false;
7202         int len, i;
7203         u32 cs_count;
7204
7205         if (!rdev->ops->channel_switch ||
7206             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
7207                 return -EOPNOTSUPP;
7208
7209         switch (dev->ieee80211_ptr->iftype) {
7210         case NL80211_IFTYPE_AP:
7211         case NL80211_IFTYPE_P2P_GO:
7212                 need_new_beacon = true;
7213
7214                 /* useless if AP is not running */
7215                 if (!wdev->beacon_interval)
7216                         return -ENOTCONN;
7217                 break;
7218         case NL80211_IFTYPE_ADHOC:
7219                 if (!wdev->ssid_len)
7220                         return -ENOTCONN;
7221                 break;
7222         case NL80211_IFTYPE_MESH_POINT:
7223                 if (!wdev->mesh_id_len)
7224                         return -ENOTCONN;
7225                 break;
7226         default:
7227                 return -EOPNOTSUPP;
7228         }
7229
7230         memset(&params, 0, sizeof(params));
7231
7232         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7233             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
7234                 return -EINVAL;
7235
7236         /* only important for AP, IBSS and mesh create IEs internally */
7237         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
7238                 return -EINVAL;
7239
7240         /* Even though the attribute is u32, the specification says
7241          * u8, so let's make sure we don't overflow.
7242          */
7243         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
7244         if (cs_count > 255)
7245                 return -EINVAL;
7246
7247         params.count = cs_count;
7248
7249         if (!need_new_beacon)
7250                 goto skip_beacons;
7251
7252         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
7253         if (err)
7254                 return err;
7255
7256         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
7257                                info->attrs[NL80211_ATTR_CSA_IES],
7258                                nl80211_policy);
7259         if (err)
7260                 return err;
7261
7262         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
7263         if (err)
7264                 return err;
7265
7266         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
7267                 return -EINVAL;
7268
7269         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7270         if (!len || (len % sizeof(u16)))
7271                 return -EINVAL;
7272
7273         params.n_counter_offsets_beacon = len / sizeof(u16);
7274         if (rdev->wiphy.max_num_csa_counters &&
7275             (params.n_counter_offsets_beacon >
7276              rdev->wiphy.max_num_csa_counters))
7277                 return -EINVAL;
7278
7279         params.counter_offsets_beacon =
7280                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7281
7282         /* sanity checks - counters should fit and be the same */
7283         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
7284                 u16 offset = params.counter_offsets_beacon[i];
7285
7286                 if (offset >= params.beacon_csa.tail_len)
7287                         return -EINVAL;
7288
7289                 if (params.beacon_csa.tail[offset] != params.count)
7290                         return -EINVAL;
7291         }
7292
7293         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
7294                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7295                 if (!len || (len % sizeof(u16)))
7296                         return -EINVAL;
7297
7298                 params.n_counter_offsets_presp = len / sizeof(u16);
7299                 if (rdev->wiphy.max_num_csa_counters &&
7300                     (params.n_counter_offsets_beacon >
7301                      rdev->wiphy.max_num_csa_counters))
7302                         return -EINVAL;
7303
7304                 params.counter_offsets_presp =
7305                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7306
7307                 /* sanity checks - counters should fit and be the same */
7308                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
7309                         u16 offset = params.counter_offsets_presp[i];
7310
7311                         if (offset >= params.beacon_csa.probe_resp_len)
7312                                 return -EINVAL;
7313
7314                         if (params.beacon_csa.probe_resp[offset] !=
7315                             params.count)
7316                                 return -EINVAL;
7317                 }
7318         }
7319
7320 skip_beacons:
7321         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7322         if (err)
7323                 return err;
7324
7325         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7326                                            wdev->iftype))
7327                 return -EINVAL;
7328
7329         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7330                                             &params.chandef,
7331                                             wdev->iftype);
7332         if (err < 0)
7333                 return err;
7334
7335         if (err > 0)
7336                 params.radar_required = true;
7337
7338         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7339                 params.block_tx = true;
7340
7341         wdev_lock(wdev);
7342         err = rdev_channel_switch(rdev, dev, &params);
7343         wdev_unlock(wdev);
7344
7345         return err;
7346 }
7347
7348 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7349                             u32 seq, int flags,
7350                             struct cfg80211_registered_device *rdev,
7351                             struct wireless_dev *wdev,
7352                             struct cfg80211_internal_bss *intbss)
7353 {
7354         struct cfg80211_bss *res = &intbss->pub;
7355         const struct cfg80211_bss_ies *ies;
7356         void *hdr;
7357         struct nlattr *bss;
7358
7359         ASSERT_WDEV_LOCK(wdev);
7360
7361         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7362                              NL80211_CMD_NEW_SCAN_RESULTS);
7363         if (!hdr)
7364                 return -1;
7365
7366         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7367
7368         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7369                 goto nla_put_failure;
7370         if (wdev->netdev &&
7371             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7372                 goto nla_put_failure;
7373         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7374                               NL80211_ATTR_PAD))
7375                 goto nla_put_failure;
7376
7377         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7378         if (!bss)
7379                 goto nla_put_failure;
7380         if ((!is_zero_ether_addr(res->bssid) &&
7381              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7382                 goto nla_put_failure;
7383
7384         rcu_read_lock();
7385         /* indicate whether we have probe response data or not */
7386         if (rcu_access_pointer(res->proberesp_ies) &&
7387             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7388                 goto fail_unlock_rcu;
7389
7390         /* this pointer prefers to be pointed to probe response data
7391          * but is always valid
7392          */
7393         ies = rcu_dereference(res->ies);
7394         if (ies) {
7395                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7396                                       NL80211_BSS_PAD))
7397                         goto fail_unlock_rcu;
7398                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7399                                         ies->len, ies->data))
7400                         goto fail_unlock_rcu;
7401         }
7402
7403         /* and this pointer is always (unless driver didn't know) beacon data */
7404         ies = rcu_dereference(res->beacon_ies);
7405         if (ies && ies->from_beacon) {
7406                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7407                                       NL80211_BSS_PAD))
7408                         goto fail_unlock_rcu;
7409                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7410                                         ies->len, ies->data))
7411                         goto fail_unlock_rcu;
7412         }
7413         rcu_read_unlock();
7414
7415         if (res->beacon_interval &&
7416             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7417                 goto nla_put_failure;
7418         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7419             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7420             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7421             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7422                         jiffies_to_msecs(jiffies - intbss->ts)))
7423                 goto nla_put_failure;
7424
7425         if (intbss->parent_tsf &&
7426             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7427                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7428              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7429                      intbss->parent_bssid)))
7430                 goto nla_put_failure;
7431
7432         if (intbss->ts_boottime &&
7433             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7434                               intbss->ts_boottime, NL80211_BSS_PAD))
7435                 goto nla_put_failure;
7436
7437         switch (rdev->wiphy.signal_type) {
7438         case CFG80211_SIGNAL_TYPE_MBM:
7439                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7440                         goto nla_put_failure;
7441                 break;
7442         case CFG80211_SIGNAL_TYPE_UNSPEC:
7443                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7444                         goto nla_put_failure;
7445                 break;
7446         default:
7447                 break;
7448         }
7449
7450         switch (wdev->iftype) {
7451         case NL80211_IFTYPE_P2P_CLIENT:
7452         case NL80211_IFTYPE_STATION:
7453                 if (intbss == wdev->current_bss &&
7454                     nla_put_u32(msg, NL80211_BSS_STATUS,
7455                                 NL80211_BSS_STATUS_ASSOCIATED))
7456                         goto nla_put_failure;
7457                 break;
7458         case NL80211_IFTYPE_ADHOC:
7459                 if (intbss == wdev->current_bss &&
7460                     nla_put_u32(msg, NL80211_BSS_STATUS,
7461                                 NL80211_BSS_STATUS_IBSS_JOINED))
7462                         goto nla_put_failure;
7463                 break;
7464         default:
7465                 break;
7466         }
7467
7468         nla_nest_end(msg, bss);
7469
7470         genlmsg_end(msg, hdr);
7471         return 0;
7472
7473  fail_unlock_rcu:
7474         rcu_read_unlock();
7475  nla_put_failure:
7476         genlmsg_cancel(msg, hdr);
7477         return -EMSGSIZE;
7478 }
7479
7480 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7481 {
7482         struct cfg80211_registered_device *rdev;
7483         struct cfg80211_internal_bss *scan;
7484         struct wireless_dev *wdev;
7485         int start = cb->args[2], idx = 0;
7486         int err;
7487
7488         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7489         if (err)
7490                 return err;
7491
7492         wdev_lock(wdev);
7493         spin_lock_bh(&rdev->bss_lock);
7494         cfg80211_bss_expire(rdev);
7495
7496         cb->seq = rdev->bss_generation;
7497
7498         list_for_each_entry(scan, &rdev->bss_list, list) {
7499                 if (++idx <= start)
7500                         continue;
7501                 if (nl80211_send_bss(skb, cb,
7502                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7503                                 rdev, wdev, scan) < 0) {
7504                         idx--;
7505                         break;
7506                 }
7507         }
7508
7509         spin_unlock_bh(&rdev->bss_lock);
7510         wdev_unlock(wdev);
7511
7512         cb->args[2] = idx;
7513         nl80211_finish_wdev_dump(rdev);
7514
7515         return skb->len;
7516 }
7517
7518 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7519                                int flags, struct net_device *dev,
7520                                bool allow_radio_stats,
7521                                struct survey_info *survey)
7522 {
7523         void *hdr;
7524         struct nlattr *infoattr;
7525
7526         /* skip radio stats if userspace didn't request them */
7527         if (!survey->channel && !allow_radio_stats)
7528                 return 0;
7529
7530         hdr = nl80211hdr_put(msg, portid, seq, flags,
7531                              NL80211_CMD_NEW_SURVEY_RESULTS);
7532         if (!hdr)
7533                 return -ENOMEM;
7534
7535         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7536                 goto nla_put_failure;
7537
7538         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7539         if (!infoattr)
7540                 goto nla_put_failure;
7541
7542         if (survey->channel &&
7543             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7544                         survey->channel->center_freq))
7545                 goto nla_put_failure;
7546
7547         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7548             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7549                 goto nla_put_failure;
7550         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7551             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7552                 goto nla_put_failure;
7553         if ((survey->filled & SURVEY_INFO_TIME) &&
7554             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7555                         survey->time, NL80211_SURVEY_INFO_PAD))
7556                 goto nla_put_failure;
7557         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7558             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7559                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7560                 goto nla_put_failure;
7561         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7562             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7563                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7564                 goto nla_put_failure;
7565         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7566             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7567                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7568                 goto nla_put_failure;
7569         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7570             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7571                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7572                 goto nla_put_failure;
7573         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7574             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7575                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7576                 goto nla_put_failure;
7577
7578         nla_nest_end(msg, infoattr);
7579
7580         genlmsg_end(msg, hdr);
7581         return 0;
7582
7583  nla_put_failure:
7584         genlmsg_cancel(msg, hdr);
7585         return -EMSGSIZE;
7586 }
7587
7588 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7589 {
7590         struct survey_info survey;
7591         struct cfg80211_registered_device *rdev;
7592         struct wireless_dev *wdev;
7593         int survey_idx = cb->args[2];
7594         int res;
7595         bool radio_stats;
7596
7597         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7598         if (res)
7599                 return res;
7600
7601         /* prepare_wdev_dump parsed the attributes */
7602         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7603
7604         if (!wdev->netdev) {
7605                 res = -EINVAL;
7606                 goto out_err;
7607         }
7608
7609         if (!rdev->ops->dump_survey) {
7610                 res = -EOPNOTSUPP;
7611                 goto out_err;
7612         }
7613
7614         while (1) {
7615                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7616                 if (res == -ENOENT)
7617                         break;
7618                 if (res)
7619                         goto out_err;
7620
7621                 /* don't send disabled channels, but do send non-channel data */
7622                 if (survey.channel &&
7623                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7624                         survey_idx++;
7625                         continue;
7626                 }
7627
7628                 if (nl80211_send_survey(skb,
7629                                 NETLINK_CB(cb->skb).portid,
7630                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7631                                 wdev->netdev, radio_stats, &survey) < 0)
7632                         goto out;
7633                 survey_idx++;
7634         }
7635
7636  out:
7637         cb->args[2] = survey_idx;
7638         res = skb->len;
7639  out_err:
7640         nl80211_finish_wdev_dump(rdev);
7641         return res;
7642 }
7643
7644 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7645 {
7646         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7647                                   NL80211_WPA_VERSION_2));
7648 }
7649
7650 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7651 {
7652         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7653         struct net_device *dev = info->user_ptr[1];
7654         struct ieee80211_channel *chan;
7655         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7656         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7657         enum nl80211_auth_type auth_type;
7658         struct key_parse key;
7659         bool local_state_change;
7660
7661         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7662                 return -EINVAL;
7663
7664         if (!info->attrs[NL80211_ATTR_MAC])
7665                 return -EINVAL;
7666
7667         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7668                 return -EINVAL;
7669
7670         if (!info->attrs[NL80211_ATTR_SSID])
7671                 return -EINVAL;
7672
7673         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7674                 return -EINVAL;
7675
7676         err = nl80211_parse_key(info, &key);
7677         if (err)
7678                 return err;
7679
7680         if (key.idx >= 0) {
7681                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7682                         return -EINVAL;
7683                 if (!key.p.key || !key.p.key_len)
7684                         return -EINVAL;
7685                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7686                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7687                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7688                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7689                         return -EINVAL;
7690                 if (key.idx > 3)
7691                         return -EINVAL;
7692         } else {
7693                 key.p.key_len = 0;
7694                 key.p.key = NULL;
7695         }
7696
7697         if (key.idx >= 0) {
7698                 int i;
7699                 bool ok = false;
7700
7701                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7702                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7703                                 ok = true;
7704                                 break;
7705                         }
7706                 }
7707                 if (!ok)
7708                         return -EINVAL;
7709         }
7710
7711         if (!rdev->ops->auth)
7712                 return -EOPNOTSUPP;
7713
7714         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7715             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7716                 return -EOPNOTSUPP;
7717
7718         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7719         chan = nl80211_get_valid_chan(&rdev->wiphy,
7720                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7721         if (!chan)
7722                 return -EINVAL;
7723
7724         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7725         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7726
7727         if (info->attrs[NL80211_ATTR_IE]) {
7728                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7729                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7730         }
7731
7732         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7733         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7734                 return -EINVAL;
7735
7736         if (auth_type == NL80211_AUTHTYPE_SAE &&
7737             !info->attrs[NL80211_ATTR_SAE_DATA])
7738                 return -EINVAL;
7739
7740         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7741                 if (auth_type != NL80211_AUTHTYPE_SAE)
7742                         return -EINVAL;
7743                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7744                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7745                 /* need to include at least Auth Transaction and Status Code */
7746                 if (sae_data_len < 4)
7747                         return -EINVAL;
7748         }
7749
7750         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7751
7752         /*
7753          * Since we no longer track auth state, ignore
7754          * requests to only change local state.
7755          */
7756         if (local_state_change)
7757                 return 0;
7758
7759         wdev_lock(dev->ieee80211_ptr);
7760         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7761                                  ssid, ssid_len, ie, ie_len,
7762                                  key.p.key, key.p.key_len, key.idx,
7763                                  sae_data, sae_data_len);
7764         wdev_unlock(dev->ieee80211_ptr);
7765         return err;
7766 }
7767
7768 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7769                                    struct genl_info *info,
7770                                    struct cfg80211_crypto_settings *settings,
7771                                    int cipher_limit)
7772 {
7773         memset(settings, 0, sizeof(*settings));
7774
7775         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7776
7777         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7778                 u16 proto;
7779
7780                 proto = nla_get_u16(
7781                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7782                 settings->control_port_ethertype = cpu_to_be16(proto);
7783                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7784                     proto != ETH_P_PAE)
7785                         return -EINVAL;
7786                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7787                         settings->control_port_no_encrypt = true;
7788         } else
7789                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7790
7791         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7792                 void *data;
7793                 int len, i;
7794
7795                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7796                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7797                 settings->n_ciphers_pairwise = len / sizeof(u32);
7798
7799                 if (len % sizeof(u32))
7800                         return -EINVAL;
7801
7802                 if (settings->n_ciphers_pairwise > cipher_limit)
7803                         return -EINVAL;
7804
7805                 memcpy(settings->ciphers_pairwise, data, len);
7806
7807                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7808                         if (!cfg80211_supported_cipher_suite(
7809                                         &rdev->wiphy,
7810                                         settings->ciphers_pairwise[i]))
7811                                 return -EINVAL;
7812         }
7813
7814         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7815                 settings->cipher_group =
7816                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7817                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7818                                                      settings->cipher_group))
7819                         return -EINVAL;
7820         }
7821
7822         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7823                 settings->wpa_versions =
7824                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7825                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7826                         return -EINVAL;
7827         }
7828
7829         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7830                 void *data;
7831                 int len;
7832
7833                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7834                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7835                 settings->n_akm_suites = len / sizeof(u32);
7836
7837                 if (len % sizeof(u32))
7838                         return -EINVAL;
7839
7840                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7841                         return -EINVAL;
7842
7843                 memcpy(settings->akm_suites, data, len);
7844         }
7845
7846         return 0;
7847 }
7848
7849 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7850 {
7851         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7852         struct net_device *dev = info->user_ptr[1];
7853         struct ieee80211_channel *chan;
7854         struct cfg80211_assoc_request req = {};
7855         const u8 *bssid, *ssid;
7856         int err, ssid_len = 0;
7857
7858         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7859                 return -EINVAL;
7860
7861         if (!info->attrs[NL80211_ATTR_MAC] ||
7862             !info->attrs[NL80211_ATTR_SSID] ||
7863             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7864                 return -EINVAL;
7865
7866         if (!rdev->ops->assoc)
7867                 return -EOPNOTSUPP;
7868
7869         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7870             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7871                 return -EOPNOTSUPP;
7872
7873         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7874
7875         chan = nl80211_get_valid_chan(&rdev->wiphy,
7876                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7877         if (!chan)
7878                 return -EINVAL;
7879
7880         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7881         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7882
7883         if (info->attrs[NL80211_ATTR_IE]) {
7884                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7885                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7886         }
7887
7888         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7889                 enum nl80211_mfp mfp =
7890                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7891                 if (mfp == NL80211_MFP_REQUIRED)
7892                         req.use_mfp = true;
7893                 else if (mfp != NL80211_MFP_NO)
7894                         return -EINVAL;
7895         }
7896
7897         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7898                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7899
7900         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7901                 req.flags |= ASSOC_REQ_DISABLE_HT;
7902
7903         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7904                 memcpy(&req.ht_capa_mask,
7905                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7906                        sizeof(req.ht_capa_mask));
7907
7908         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7909                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7910                         return -EINVAL;
7911                 memcpy(&req.ht_capa,
7912                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7913                        sizeof(req.ht_capa));
7914         }
7915
7916         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7917                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7918
7919         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7920                 memcpy(&req.vht_capa_mask,
7921                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7922                        sizeof(req.vht_capa_mask));
7923
7924         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7925                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7926                         return -EINVAL;
7927                 memcpy(&req.vht_capa,
7928                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7929                        sizeof(req.vht_capa));
7930         }
7931
7932         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7933                 if (!((rdev->wiphy.features &
7934                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7935                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7936                     !wiphy_ext_feature_isset(&rdev->wiphy,
7937                                              NL80211_EXT_FEATURE_RRM))
7938                         return -EINVAL;
7939                 req.flags |= ASSOC_REQ_USE_RRM;
7940         }
7941
7942         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7943         if (!err) {
7944                 wdev_lock(dev->ieee80211_ptr);
7945                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7946                                           ssid, ssid_len, &req);
7947                 wdev_unlock(dev->ieee80211_ptr);
7948         }
7949
7950         return err;
7951 }
7952
7953 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7954 {
7955         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7956         struct net_device *dev = info->user_ptr[1];
7957         const u8 *ie = NULL, *bssid;
7958         int ie_len = 0, err;
7959         u16 reason_code;
7960         bool local_state_change;
7961
7962         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7963                 return -EINVAL;
7964
7965         if (!info->attrs[NL80211_ATTR_MAC])
7966                 return -EINVAL;
7967
7968         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7969                 return -EINVAL;
7970
7971         if (!rdev->ops->deauth)
7972                 return -EOPNOTSUPP;
7973
7974         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7975             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7976                 return -EOPNOTSUPP;
7977
7978         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7979
7980         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7981         if (reason_code == 0) {
7982                 /* Reason Code 0 is reserved */
7983                 return -EINVAL;
7984         }
7985
7986         if (info->attrs[NL80211_ATTR_IE]) {
7987                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7988                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7989         }
7990
7991         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7992
7993         wdev_lock(dev->ieee80211_ptr);
7994         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7995                                    local_state_change);
7996         wdev_unlock(dev->ieee80211_ptr);
7997         return err;
7998 }
7999
8000 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
8001 {
8002         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8003         struct net_device *dev = info->user_ptr[1];
8004         const u8 *ie = NULL, *bssid;
8005         int ie_len = 0, err;
8006         u16 reason_code;
8007         bool local_state_change;
8008
8009         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8010                 return -EINVAL;
8011
8012         if (!info->attrs[NL80211_ATTR_MAC])
8013                 return -EINVAL;
8014
8015         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8016                 return -EINVAL;
8017
8018         if (!rdev->ops->disassoc)
8019                 return -EOPNOTSUPP;
8020
8021         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8022             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8023                 return -EOPNOTSUPP;
8024
8025         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8026
8027         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8028         if (reason_code == 0) {
8029                 /* Reason Code 0 is reserved */
8030                 return -EINVAL;
8031         }
8032
8033         if (info->attrs[NL80211_ATTR_IE]) {
8034                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8035                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8036         }
8037
8038         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8039
8040         wdev_lock(dev->ieee80211_ptr);
8041         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
8042                                      local_state_change);
8043         wdev_unlock(dev->ieee80211_ptr);
8044         return err;
8045 }
8046
8047 static bool
8048 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
8049                          int mcast_rate[NUM_NL80211_BANDS],
8050                          int rateval)
8051 {
8052         struct wiphy *wiphy = &rdev->wiphy;
8053         bool found = false;
8054         int band, i;
8055
8056         for (band = 0; band < NUM_NL80211_BANDS; band++) {
8057                 struct ieee80211_supported_band *sband;
8058
8059                 sband = wiphy->bands[band];
8060                 if (!sband)
8061                         continue;
8062
8063                 for (i = 0; i < sband->n_bitrates; i++) {
8064                         if (sband->bitrates[i].bitrate == rateval) {
8065                                 mcast_rate[band] = i + 1;
8066                                 found = true;
8067                                 break;
8068                         }
8069                 }
8070         }
8071
8072         return found;
8073 }
8074
8075 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
8076 {
8077         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8078         struct net_device *dev = info->user_ptr[1];
8079         struct cfg80211_ibss_params ibss;
8080         struct wiphy *wiphy;
8081         struct cfg80211_cached_keys *connkeys = NULL;
8082         int err;
8083
8084         memset(&ibss, 0, sizeof(ibss));
8085
8086         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8087                 return -EINVAL;
8088
8089         if (!info->attrs[NL80211_ATTR_SSID] ||
8090             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8091                 return -EINVAL;
8092
8093         ibss.beacon_interval = 100;
8094
8095         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
8096                 ibss.beacon_interval =
8097                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8098
8099         err = cfg80211_validate_beacon_int(rdev, ibss.beacon_interval);
8100         if (err)
8101                 return err;
8102
8103         if (!rdev->ops->join_ibss)
8104                 return -EOPNOTSUPP;
8105
8106         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8107                 return -EOPNOTSUPP;
8108
8109         wiphy = &rdev->wiphy;
8110
8111         if (info->attrs[NL80211_ATTR_MAC]) {
8112                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8113
8114                 if (!is_valid_ether_addr(ibss.bssid))
8115                         return -EINVAL;
8116         }
8117         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8118         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8119
8120         if (info->attrs[NL80211_ATTR_IE]) {
8121                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8122                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8123         }
8124
8125         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
8126         if (err)
8127                 return err;
8128
8129         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
8130                                      NL80211_IFTYPE_ADHOC))
8131                 return -EINVAL;
8132
8133         switch (ibss.chandef.width) {
8134         case NL80211_CHAN_WIDTH_5:
8135         case NL80211_CHAN_WIDTH_10:
8136         case NL80211_CHAN_WIDTH_20_NOHT:
8137                 break;
8138         case NL80211_CHAN_WIDTH_20:
8139         case NL80211_CHAN_WIDTH_40:
8140                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8141                         return -EINVAL;
8142                 break;
8143         case NL80211_CHAN_WIDTH_80:
8144         case NL80211_CHAN_WIDTH_80P80:
8145         case NL80211_CHAN_WIDTH_160:
8146                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8147                         return -EINVAL;
8148                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
8149                                              NL80211_EXT_FEATURE_VHT_IBSS))
8150                         return -EINVAL;
8151                 break;
8152         default:
8153                 return -EINVAL;
8154         }
8155
8156         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
8157         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
8158
8159         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8160                 u8 *rates =
8161                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8162                 int n_rates =
8163                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8164                 struct ieee80211_supported_band *sband =
8165                         wiphy->bands[ibss.chandef.chan->band];
8166
8167                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8168                                              &ibss.basic_rates);
8169                 if (err)
8170                         return err;
8171         }
8172
8173         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8174                 memcpy(&ibss.ht_capa_mask,
8175                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8176                        sizeof(ibss.ht_capa_mask));
8177
8178         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8179                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8180                         return -EINVAL;
8181                 memcpy(&ibss.ht_capa,
8182                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8183                        sizeof(ibss.ht_capa));
8184         }
8185
8186         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8187             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
8188                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8189                 return -EINVAL;
8190
8191         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8192                 bool no_ht = false;
8193
8194                 connkeys = nl80211_parse_connkeys(rdev,
8195                                           info->attrs[NL80211_ATTR_KEYS],
8196                                           &no_ht);
8197                 if (IS_ERR(connkeys))
8198                         return PTR_ERR(connkeys);
8199
8200                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
8201                     no_ht) {
8202                         kzfree(connkeys);
8203                         return -EINVAL;
8204                 }
8205         }
8206
8207         ibss.control_port =
8208                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
8209
8210         ibss.userspace_handles_dfs =
8211                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
8212
8213         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
8214         if (err)
8215                 kzfree(connkeys);
8216         return err;
8217 }
8218
8219 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
8220 {
8221         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8222         struct net_device *dev = info->user_ptr[1];
8223
8224         if (!rdev->ops->leave_ibss)
8225                 return -EOPNOTSUPP;
8226
8227         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8228                 return -EOPNOTSUPP;
8229
8230         return cfg80211_leave_ibss(rdev, dev, false);
8231 }
8232
8233 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
8234 {
8235         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8236         struct net_device *dev = info->user_ptr[1];
8237         int mcast_rate[NUM_NL80211_BANDS];
8238         u32 nla_rate;
8239         int err;
8240
8241         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
8242             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
8243             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
8244                 return -EOPNOTSUPP;
8245
8246         if (!rdev->ops->set_mcast_rate)
8247                 return -EOPNOTSUPP;
8248
8249         memset(mcast_rate, 0, sizeof(mcast_rate));
8250
8251         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
8252                 return -EINVAL;
8253
8254         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
8255         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
8256                 return -EINVAL;
8257
8258         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
8259
8260         return err;
8261 }
8262
8263 static struct sk_buff *
8264 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
8265                             struct wireless_dev *wdev, int approxlen,
8266                             u32 portid, u32 seq, enum nl80211_commands cmd,
8267                             enum nl80211_attrs attr,
8268                             const struct nl80211_vendor_cmd_info *info,
8269                             gfp_t gfp)
8270 {
8271         struct sk_buff *skb;
8272         void *hdr;
8273         struct nlattr *data;
8274
8275         skb = nlmsg_new(approxlen + 100, gfp);
8276         if (!skb)
8277                 return NULL;
8278
8279         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
8280         if (!hdr) {
8281                 kfree_skb(skb);
8282                 return NULL;
8283         }
8284
8285         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
8286                 goto nla_put_failure;
8287
8288         if (info) {
8289                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
8290                                 info->vendor_id))
8291                         goto nla_put_failure;
8292                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
8293                                 info->subcmd))
8294                         goto nla_put_failure;
8295         }
8296
8297         if (wdev) {
8298                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
8299                                       wdev_id(wdev), NL80211_ATTR_PAD))
8300                         goto nla_put_failure;
8301                 if (wdev->netdev &&
8302                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
8303                                 wdev->netdev->ifindex))
8304                         goto nla_put_failure;
8305         }
8306
8307         data = nla_nest_start(skb, attr);
8308         if (!data)
8309                 goto nla_put_failure;
8310
8311         ((void **)skb->cb)[0] = rdev;
8312         ((void **)skb->cb)[1] = hdr;
8313         ((void **)skb->cb)[2] = data;
8314
8315         return skb;
8316
8317  nla_put_failure:
8318         kfree_skb(skb);
8319         return NULL;
8320 }
8321
8322 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8323                                            struct wireless_dev *wdev,
8324                                            enum nl80211_commands cmd,
8325                                            enum nl80211_attrs attr,
8326                                            int vendor_event_idx,
8327                                            int approxlen, gfp_t gfp)
8328 {
8329         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8330         const struct nl80211_vendor_cmd_info *info;
8331
8332         switch (cmd) {
8333         case NL80211_CMD_TESTMODE:
8334                 if (WARN_ON(vendor_event_idx != -1))
8335                         return NULL;
8336                 info = NULL;
8337                 break;
8338         case NL80211_CMD_VENDOR:
8339                 if (WARN_ON(vendor_event_idx < 0 ||
8340                             vendor_event_idx >= wiphy->n_vendor_events))
8341                         return NULL;
8342                 info = &wiphy->vendor_events[vendor_event_idx];
8343                 break;
8344         default:
8345                 WARN_ON(1);
8346                 return NULL;
8347         }
8348
8349         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8350                                            cmd, attr, info, gfp);
8351 }
8352 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8353
8354 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8355 {
8356         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8357         void *hdr = ((void **)skb->cb)[1];
8358         struct nlattr *data = ((void **)skb->cb)[2];
8359         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8360
8361         /* clear CB data for netlink core to own from now on */
8362         memset(skb->cb, 0, sizeof(skb->cb));
8363
8364         nla_nest_end(skb, data);
8365         genlmsg_end(skb, hdr);
8366
8367         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8368                 mcgrp = NL80211_MCGRP_VENDOR;
8369
8370         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8371                                 mcgrp, gfp);
8372 }
8373 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8374
8375 #ifdef CONFIG_NL80211_TESTMODE
8376 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8377 {
8378         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8379         struct wireless_dev *wdev =
8380                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8381         int err;
8382
8383         if (!rdev->ops->testmode_cmd)
8384                 return -EOPNOTSUPP;
8385
8386         if (IS_ERR(wdev)) {
8387                 err = PTR_ERR(wdev);
8388                 if (err != -EINVAL)
8389                         return err;
8390                 wdev = NULL;
8391         } else if (wdev->wiphy != &rdev->wiphy) {
8392                 return -EINVAL;
8393         }
8394
8395         if (!info->attrs[NL80211_ATTR_TESTDATA])
8396                 return -EINVAL;
8397
8398         rdev->cur_cmd_info = info;
8399         err = rdev_testmode_cmd(rdev, wdev,
8400                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8401                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8402         rdev->cur_cmd_info = NULL;
8403
8404         return err;
8405 }
8406
8407 static int nl80211_testmode_dump(struct sk_buff *skb,
8408                                  struct netlink_callback *cb)
8409 {
8410         struct cfg80211_registered_device *rdev;
8411         int err;
8412         long phy_idx;
8413         void *data = NULL;
8414         int data_len = 0;
8415
8416         rtnl_lock();
8417
8418         if (cb->args[0]) {
8419                 /*
8420                  * 0 is a valid index, but not valid for args[0],
8421                  * so we need to offset by 1.
8422                  */
8423                 phy_idx = cb->args[0] - 1;
8424         } else {
8425                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8426                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
8427                                   nl80211_policy);
8428                 if (err)
8429                         goto out_err;
8430
8431                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
8432                                                   nl80211_fam.attrbuf);
8433                 if (IS_ERR(rdev)) {
8434                         err = PTR_ERR(rdev);
8435                         goto out_err;
8436                 }
8437                 phy_idx = rdev->wiphy_idx;
8438                 rdev = NULL;
8439
8440                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
8441                         cb->args[1] =
8442                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
8443         }
8444
8445         if (cb->args[1]) {
8446                 data = nla_data((void *)cb->args[1]);
8447                 data_len = nla_len((void *)cb->args[1]);
8448         }
8449
8450         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8451         if (!rdev) {
8452                 err = -ENOENT;
8453                 goto out_err;
8454         }
8455
8456         if (!rdev->ops->testmode_dump) {
8457                 err = -EOPNOTSUPP;
8458                 goto out_err;
8459         }
8460
8461         while (1) {
8462                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8463                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8464                                            NL80211_CMD_TESTMODE);
8465                 struct nlattr *tmdata;
8466
8467                 if (!hdr)
8468                         break;
8469
8470                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8471                         genlmsg_cancel(skb, hdr);
8472                         break;
8473                 }
8474
8475                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8476                 if (!tmdata) {
8477                         genlmsg_cancel(skb, hdr);
8478                         break;
8479                 }
8480                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8481                 nla_nest_end(skb, tmdata);
8482
8483                 if (err == -ENOBUFS || err == -ENOENT) {
8484                         genlmsg_cancel(skb, hdr);
8485                         break;
8486                 } else if (err) {
8487                         genlmsg_cancel(skb, hdr);
8488                         goto out_err;
8489                 }
8490
8491                 genlmsg_end(skb, hdr);
8492         }
8493
8494         err = skb->len;
8495         /* see above */
8496         cb->args[0] = phy_idx + 1;
8497  out_err:
8498         rtnl_unlock();
8499         return err;
8500 }
8501 #endif
8502
8503 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8504 {
8505         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8506         struct net_device *dev = info->user_ptr[1];
8507         struct cfg80211_connect_params connect;
8508         struct wiphy *wiphy;
8509         struct cfg80211_cached_keys *connkeys = NULL;
8510         int err;
8511
8512         memset(&connect, 0, sizeof(connect));
8513
8514         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8515                 return -EINVAL;
8516
8517         if (!info->attrs[NL80211_ATTR_SSID] ||
8518             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8519                 return -EINVAL;
8520
8521         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8522                 connect.auth_type =
8523                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8524                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8525                                              NL80211_CMD_CONNECT))
8526                         return -EINVAL;
8527         } else
8528                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8529
8530         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8531
8532         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8533                                       NL80211_MAX_NR_CIPHER_SUITES);
8534         if (err)
8535                 return err;
8536
8537         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8538             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8539                 return -EOPNOTSUPP;
8540
8541         wiphy = &rdev->wiphy;
8542
8543         connect.bg_scan_period = -1;
8544         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8545                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8546                 connect.bg_scan_period =
8547                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8548         }
8549
8550         if (info->attrs[NL80211_ATTR_MAC])
8551                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8552         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8553                 connect.bssid_hint =
8554                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8555         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8556         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8557
8558         if (info->attrs[NL80211_ATTR_IE]) {
8559                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8560                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8561         }
8562
8563         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8564                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8565                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8566                     connect.mfp != NL80211_MFP_NO)
8567                         return -EINVAL;
8568         } else {
8569                 connect.mfp = NL80211_MFP_NO;
8570         }
8571
8572         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8573                 connect.prev_bssid =
8574                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8575
8576         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8577                 connect.channel = nl80211_get_valid_chan(
8578                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8579                 if (!connect.channel)
8580                         return -EINVAL;
8581         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8582                 connect.channel_hint = nl80211_get_valid_chan(
8583                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8584                 if (!connect.channel_hint)
8585                         return -EINVAL;
8586         }
8587
8588         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8589                 connkeys = nl80211_parse_connkeys(rdev,
8590                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8591                 if (IS_ERR(connkeys))
8592                         return PTR_ERR(connkeys);
8593         }
8594
8595         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8596                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8597
8598         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8599                 memcpy(&connect.ht_capa_mask,
8600                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8601                        sizeof(connect.ht_capa_mask));
8602
8603         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8604                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8605                         kzfree(connkeys);
8606                         return -EINVAL;
8607                 }
8608                 memcpy(&connect.ht_capa,
8609                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8610                        sizeof(connect.ht_capa));
8611         }
8612
8613         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8614                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8615
8616         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8617                 memcpy(&connect.vht_capa_mask,
8618                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8619                        sizeof(connect.vht_capa_mask));
8620
8621         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8622                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8623                         kzfree(connkeys);
8624                         return -EINVAL;
8625                 }
8626                 memcpy(&connect.vht_capa,
8627                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8628                        sizeof(connect.vht_capa));
8629         }
8630
8631         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8632                 if (!((rdev->wiphy.features &
8633                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8634                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8635                     !wiphy_ext_feature_isset(&rdev->wiphy,
8636                                              NL80211_EXT_FEATURE_RRM)) {
8637                         kzfree(connkeys);
8638                         return -EINVAL;
8639                 }
8640                 connect.flags |= ASSOC_REQ_USE_RRM;
8641         }
8642
8643         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8644         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8645                 kzfree(connkeys);
8646                 return -EOPNOTSUPP;
8647         }
8648
8649         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8650                 /* bss selection makes no sense if bssid is set */
8651                 if (connect.bssid) {
8652                         kzfree(connkeys);
8653                         return -EINVAL;
8654                 }
8655
8656                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8657                                        wiphy, &connect.bss_select);
8658                 if (err) {
8659                         kzfree(connkeys);
8660                         return err;
8661                 }
8662         }
8663
8664         wdev_lock(dev->ieee80211_ptr);
8665         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8666                                connect.prev_bssid);
8667         wdev_unlock(dev->ieee80211_ptr);
8668         if (err)
8669                 kzfree(connkeys);
8670         return err;
8671 }
8672
8673 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8674 {
8675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8676         struct net_device *dev = info->user_ptr[1];
8677         u16 reason;
8678         int ret;
8679
8680         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8681                 reason = WLAN_REASON_DEAUTH_LEAVING;
8682         else
8683                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8684
8685         if (reason == 0)
8686                 return -EINVAL;
8687
8688         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8689             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8690                 return -EOPNOTSUPP;
8691
8692         wdev_lock(dev->ieee80211_ptr);
8693         ret = cfg80211_disconnect(rdev, dev, reason, true);
8694         wdev_unlock(dev->ieee80211_ptr);
8695         return ret;
8696 }
8697
8698 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8699 {
8700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8701         struct net *net;
8702         int err;
8703
8704         if (info->attrs[NL80211_ATTR_PID]) {
8705                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8706
8707                 net = get_net_ns_by_pid(pid);
8708         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8709                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8710
8711                 net = get_net_ns_by_fd(fd);
8712         } else {
8713                 return -EINVAL;
8714         }
8715
8716         if (IS_ERR(net))
8717                 return PTR_ERR(net);
8718
8719         err = 0;
8720
8721         /* check if anything to do */
8722         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8723                 err = cfg80211_switch_netns(rdev, net);
8724
8725         put_net(net);
8726         return err;
8727 }
8728
8729 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8730 {
8731         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8732         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8733                         struct cfg80211_pmksa *pmksa) = NULL;
8734         struct net_device *dev = info->user_ptr[1];
8735         struct cfg80211_pmksa pmksa;
8736
8737         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8738
8739         if (!info->attrs[NL80211_ATTR_MAC])
8740                 return -EINVAL;
8741
8742         if (!info->attrs[NL80211_ATTR_PMKID])
8743                 return -EINVAL;
8744
8745         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8746         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8747
8748         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8749             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8750                 return -EOPNOTSUPP;
8751
8752         switch (info->genlhdr->cmd) {
8753         case NL80211_CMD_SET_PMKSA:
8754                 rdev_ops = rdev->ops->set_pmksa;
8755                 break;
8756         case NL80211_CMD_DEL_PMKSA:
8757                 rdev_ops = rdev->ops->del_pmksa;
8758                 break;
8759         default:
8760                 WARN_ON(1);
8761                 break;
8762         }
8763
8764         if (!rdev_ops)
8765                 return -EOPNOTSUPP;
8766
8767         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8768 }
8769
8770 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8771 {
8772         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8773         struct net_device *dev = info->user_ptr[1];
8774
8775         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8776             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8777                 return -EOPNOTSUPP;
8778
8779         if (!rdev->ops->flush_pmksa)
8780                 return -EOPNOTSUPP;
8781
8782         return rdev_flush_pmksa(rdev, dev);
8783 }
8784
8785 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8786 {
8787         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8788         struct net_device *dev = info->user_ptr[1];
8789         u8 action_code, dialog_token;
8790         u32 peer_capability = 0;
8791         u16 status_code;
8792         u8 *peer;
8793         bool initiator;
8794
8795         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8796             !rdev->ops->tdls_mgmt)
8797                 return -EOPNOTSUPP;
8798
8799         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8800             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8801             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8802             !info->attrs[NL80211_ATTR_IE] ||
8803             !info->attrs[NL80211_ATTR_MAC])
8804                 return -EINVAL;
8805
8806         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8807         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8808         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8809         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8810         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8811         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8812                 peer_capability =
8813                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8814
8815         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8816                               dialog_token, status_code, peer_capability,
8817                               initiator,
8818                               nla_data(info->attrs[NL80211_ATTR_IE]),
8819                               nla_len(info->attrs[NL80211_ATTR_IE]));
8820 }
8821
8822 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8823 {
8824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8825         struct net_device *dev = info->user_ptr[1];
8826         enum nl80211_tdls_operation operation;
8827         u8 *peer;
8828
8829         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8830             !rdev->ops->tdls_oper)
8831                 return -EOPNOTSUPP;
8832
8833         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8834             !info->attrs[NL80211_ATTR_MAC])
8835                 return -EINVAL;
8836
8837         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8838         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8839
8840         return rdev_tdls_oper(rdev, dev, peer, operation);
8841 }
8842
8843 static int nl80211_remain_on_channel(struct sk_buff *skb,
8844                                      struct genl_info *info)
8845 {
8846         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8847         struct wireless_dev *wdev = info->user_ptr[1];
8848         struct cfg80211_chan_def chandef;
8849         struct sk_buff *msg;
8850         void *hdr;
8851         u64 cookie;
8852         u32 duration;
8853         int err;
8854
8855         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8856             !info->attrs[NL80211_ATTR_DURATION])
8857                 return -EINVAL;
8858
8859         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8860
8861         if (!rdev->ops->remain_on_channel ||
8862             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8863                 return -EOPNOTSUPP;
8864
8865         /*
8866          * We should be on that channel for at least a minimum amount of
8867          * time (10ms) but no longer than the driver supports.
8868          */
8869         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8870             duration > rdev->wiphy.max_remain_on_channel_duration)
8871                 return -EINVAL;
8872
8873         err = nl80211_parse_chandef(rdev, info, &chandef);
8874         if (err)
8875                 return err;
8876
8877         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8878         if (!msg)
8879                 return -ENOMEM;
8880
8881         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8882                              NL80211_CMD_REMAIN_ON_CHANNEL);
8883         if (!hdr) {
8884                 err = -ENOBUFS;
8885                 goto free_msg;
8886         }
8887
8888         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8889                                      duration, &cookie);
8890
8891         if (err)
8892                 goto free_msg;
8893
8894         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8895                               NL80211_ATTR_PAD))
8896                 goto nla_put_failure;
8897
8898         genlmsg_end(msg, hdr);
8899
8900         return genlmsg_reply(msg, info);
8901
8902  nla_put_failure:
8903         err = -ENOBUFS;
8904  free_msg:
8905         nlmsg_free(msg);
8906         return err;
8907 }
8908
8909 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8910                                             struct genl_info *info)
8911 {
8912         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8913         struct wireless_dev *wdev = info->user_ptr[1];
8914         u64 cookie;
8915
8916         if (!info->attrs[NL80211_ATTR_COOKIE])
8917                 return -EINVAL;
8918
8919         if (!rdev->ops->cancel_remain_on_channel)
8920                 return -EOPNOTSUPP;
8921
8922         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8923
8924         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8925 }
8926
8927 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8928                                        struct genl_info *info)
8929 {
8930         struct cfg80211_bitrate_mask mask;
8931         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8932         struct net_device *dev = info->user_ptr[1];
8933         int err;
8934
8935         if (!rdev->ops->set_bitrate_mask)
8936                 return -EOPNOTSUPP;
8937
8938         err = nl80211_parse_tx_bitrate_mask(info, &mask);
8939         if (err)
8940                 return err;
8941
8942         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8943 }
8944
8945 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8946 {
8947         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8948         struct wireless_dev *wdev = info->user_ptr[1];
8949         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8950
8951         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8952                 return -EINVAL;
8953
8954         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8955                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8956
8957         switch (wdev->iftype) {
8958         case NL80211_IFTYPE_STATION:
8959         case NL80211_IFTYPE_ADHOC:
8960         case NL80211_IFTYPE_P2P_CLIENT:
8961         case NL80211_IFTYPE_AP:
8962         case NL80211_IFTYPE_AP_VLAN:
8963         case NL80211_IFTYPE_MESH_POINT:
8964         case NL80211_IFTYPE_P2P_GO:
8965         case NL80211_IFTYPE_P2P_DEVICE:
8966                 break;
8967         default:
8968                 return -EOPNOTSUPP;
8969         }
8970
8971         /* not much point in registering if we can't reply */
8972         if (!rdev->ops->mgmt_tx)
8973                 return -EOPNOTSUPP;
8974
8975         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8976                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8977                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8978 }
8979
8980 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8981 {
8982         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8983         struct wireless_dev *wdev = info->user_ptr[1];
8984         struct cfg80211_chan_def chandef;
8985         int err;
8986         void *hdr = NULL;
8987         u64 cookie;
8988         struct sk_buff *msg = NULL;
8989         struct cfg80211_mgmt_tx_params params = {
8990                 .dont_wait_for_ack =
8991                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8992         };
8993
8994         if (!info->attrs[NL80211_ATTR_FRAME])
8995                 return -EINVAL;
8996
8997         if (!rdev->ops->mgmt_tx)
8998                 return -EOPNOTSUPP;
8999
9000         switch (wdev->iftype) {
9001         case NL80211_IFTYPE_P2P_DEVICE:
9002                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
9003                         return -EINVAL;
9004         case NL80211_IFTYPE_STATION:
9005         case NL80211_IFTYPE_ADHOC:
9006         case NL80211_IFTYPE_P2P_CLIENT:
9007         case NL80211_IFTYPE_AP:
9008         case NL80211_IFTYPE_AP_VLAN:
9009         case NL80211_IFTYPE_MESH_POINT:
9010         case NL80211_IFTYPE_P2P_GO:
9011                 break;
9012         default:
9013                 return -EOPNOTSUPP;
9014         }
9015
9016         if (info->attrs[NL80211_ATTR_DURATION]) {
9017                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9018                         return -EINVAL;
9019                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9020
9021                 /*
9022                  * We should wait on the channel for at least a minimum amount
9023                  * of time (10ms) but no longer than the driver supports.
9024                  */
9025                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9026                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
9027                         return -EINVAL;
9028         }
9029
9030         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
9031
9032         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9033                 return -EINVAL;
9034
9035         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
9036
9037         /* get the channel if any has been specified, otherwise pass NULL to
9038          * the driver. The latter will use the current one
9039          */
9040         chandef.chan = NULL;
9041         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9042                 err = nl80211_parse_chandef(rdev, info, &chandef);
9043                 if (err)
9044                         return err;
9045         }
9046
9047         if (!chandef.chan && params.offchan)
9048                 return -EINVAL;
9049
9050         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
9051         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
9052
9053         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
9054                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9055                 int i;
9056
9057                 if (len % sizeof(u16))
9058                         return -EINVAL;
9059
9060                 params.n_csa_offsets = len / sizeof(u16);
9061                 params.csa_offsets =
9062                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9063
9064                 /* check that all the offsets fit the frame */
9065                 for (i = 0; i < params.n_csa_offsets; i++) {
9066                         if (params.csa_offsets[i] >= params.len)
9067                                 return -EINVAL;
9068                 }
9069         }
9070
9071         if (!params.dont_wait_for_ack) {
9072                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9073                 if (!msg)
9074                         return -ENOMEM;
9075
9076                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9077                                      NL80211_CMD_FRAME);
9078                 if (!hdr) {
9079                         err = -ENOBUFS;
9080                         goto free_msg;
9081                 }
9082         }
9083
9084         params.chan = chandef.chan;
9085         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
9086         if (err)
9087                 goto free_msg;
9088
9089         if (msg) {
9090                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9091                                       NL80211_ATTR_PAD))
9092                         goto nla_put_failure;
9093
9094                 genlmsg_end(msg, hdr);
9095                 return genlmsg_reply(msg, info);
9096         }
9097
9098         return 0;
9099
9100  nla_put_failure:
9101         err = -ENOBUFS;
9102  free_msg:
9103         nlmsg_free(msg);
9104         return err;
9105 }
9106
9107 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9108 {
9109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9110         struct wireless_dev *wdev = info->user_ptr[1];
9111         u64 cookie;
9112
9113         if (!info->attrs[NL80211_ATTR_COOKIE])
9114                 return -EINVAL;
9115
9116         if (!rdev->ops->mgmt_tx_cancel_wait)
9117                 return -EOPNOTSUPP;
9118
9119         switch (wdev->iftype) {
9120         case NL80211_IFTYPE_STATION:
9121         case NL80211_IFTYPE_ADHOC:
9122         case NL80211_IFTYPE_P2P_CLIENT:
9123         case NL80211_IFTYPE_AP:
9124         case NL80211_IFTYPE_AP_VLAN:
9125         case NL80211_IFTYPE_P2P_GO:
9126         case NL80211_IFTYPE_P2P_DEVICE:
9127                 break;
9128         default:
9129                 return -EOPNOTSUPP;
9130         }
9131
9132         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9133
9134         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9135 }
9136
9137 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9138 {
9139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9140         struct wireless_dev *wdev;
9141         struct net_device *dev = info->user_ptr[1];
9142         u8 ps_state;
9143         bool state;
9144         int err;
9145
9146         if (!info->attrs[NL80211_ATTR_PS_STATE])
9147                 return -EINVAL;
9148
9149         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9150
9151         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9152                 return -EINVAL;
9153
9154         wdev = dev->ieee80211_ptr;
9155
9156         if (!rdev->ops->set_power_mgmt)
9157                 return -EOPNOTSUPP;
9158
9159         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9160
9161         if (state == wdev->ps)
9162                 return 0;
9163
9164         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9165         if (!err)
9166                 wdev->ps = state;
9167         return err;
9168 }
9169
9170 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9171 {
9172         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9173         enum nl80211_ps_state ps_state;
9174         struct wireless_dev *wdev;
9175         struct net_device *dev = info->user_ptr[1];
9176         struct sk_buff *msg;
9177         void *hdr;
9178         int err;
9179
9180         wdev = dev->ieee80211_ptr;
9181
9182         if (!rdev->ops->set_power_mgmt)
9183                 return -EOPNOTSUPP;
9184
9185         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9186         if (!msg)
9187                 return -ENOMEM;
9188
9189         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9190                              NL80211_CMD_GET_POWER_SAVE);
9191         if (!hdr) {
9192                 err = -ENOBUFS;
9193                 goto free_msg;
9194         }
9195
9196         if (wdev->ps)
9197                 ps_state = NL80211_PS_ENABLED;
9198         else
9199                 ps_state = NL80211_PS_DISABLED;
9200
9201         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9202                 goto nla_put_failure;
9203
9204         genlmsg_end(msg, hdr);
9205         return genlmsg_reply(msg, info);
9206
9207  nla_put_failure:
9208         err = -ENOBUFS;
9209  free_msg:
9210         nlmsg_free(msg);
9211         return err;
9212 }
9213
9214 static const struct nla_policy
9215 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9216         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
9217         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9218         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9219         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9220         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9221         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9222 };
9223
9224 static int nl80211_set_cqm_txe(struct genl_info *info,
9225                                u32 rate, u32 pkts, u32 intvl)
9226 {
9227         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9228         struct net_device *dev = info->user_ptr[1];
9229         struct wireless_dev *wdev = dev->ieee80211_ptr;
9230
9231         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9232                 return -EINVAL;
9233
9234         if (!rdev->ops->set_cqm_txe_config)
9235                 return -EOPNOTSUPP;
9236
9237         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9238             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9239                 return -EOPNOTSUPP;
9240
9241         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9242 }
9243
9244 static int nl80211_set_cqm_rssi(struct genl_info *info,
9245                                 s32 threshold, u32 hysteresis)
9246 {
9247         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9248         struct net_device *dev = info->user_ptr[1];
9249         struct wireless_dev *wdev = dev->ieee80211_ptr;
9250
9251         if (threshold > 0)
9252                 return -EINVAL;
9253
9254         /* disabling - hysteresis should also be zero then */
9255         if (threshold == 0)
9256                 hysteresis = 0;
9257
9258         if (!rdev->ops->set_cqm_rssi_config)
9259                 return -EOPNOTSUPP;
9260
9261         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9262             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9263                 return -EOPNOTSUPP;
9264
9265         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9266 }
9267
9268 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9269 {
9270         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9271         struct nlattr *cqm;
9272         int err;
9273
9274         cqm = info->attrs[NL80211_ATTR_CQM];
9275         if (!cqm)
9276                 return -EINVAL;
9277
9278         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9279                                nl80211_attr_cqm_policy);
9280         if (err)
9281                 return err;
9282
9283         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9284             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9285                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9286                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9287
9288                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9289         }
9290
9291         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9292             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9293             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9294                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9295                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9296                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9297
9298                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9299         }
9300
9301         return -EINVAL;
9302 }
9303
9304 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9305 {
9306         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9307         struct net_device *dev = info->user_ptr[1];
9308         struct ocb_setup setup = {};
9309         int err;
9310
9311         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9312         if (err)
9313                 return err;
9314
9315         return cfg80211_join_ocb(rdev, dev, &setup);
9316 }
9317
9318 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9319 {
9320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9321         struct net_device *dev = info->user_ptr[1];
9322
9323         return cfg80211_leave_ocb(rdev, dev);
9324 }
9325
9326 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9327 {
9328         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9329         struct net_device *dev = info->user_ptr[1];
9330         struct mesh_config cfg;
9331         struct mesh_setup setup;
9332         int err;
9333
9334         /* start with default */
9335         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9336         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9337
9338         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9339                 /* and parse parameters if given */
9340                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9341                 if (err)
9342                         return err;
9343         }
9344
9345         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9346             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9347                 return -EINVAL;
9348
9349         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9350         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9351
9352         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9353             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9354                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9355                         return -EINVAL;
9356
9357         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9358                 setup.beacon_interval =
9359                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9360
9361                 err = cfg80211_validate_beacon_int(rdev, setup.beacon_interval);
9362                 if (err)
9363                         return err;
9364         }
9365
9366         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9367                 setup.dtim_period =
9368                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9369                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9370                         return -EINVAL;
9371         }
9372
9373         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9374                 /* parse additional setup parameters if given */
9375                 err = nl80211_parse_mesh_setup(info, &setup);
9376                 if (err)
9377                         return err;
9378         }
9379
9380         if (setup.user_mpm)
9381                 cfg.auto_open_plinks = false;
9382
9383         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9384                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9385                 if (err)
9386                         return err;
9387         } else {
9388                 /* cfg80211_join_mesh() will sort it out */
9389                 setup.chandef.chan = NULL;
9390         }
9391
9392         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9393                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9394                 int n_rates =
9395                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9396                 struct ieee80211_supported_band *sband;
9397
9398                 if (!setup.chandef.chan)
9399                         return -EINVAL;
9400
9401                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9402
9403                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9404                                              &setup.basic_rates);
9405                 if (err)
9406                         return err;
9407         }
9408
9409         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9410 }
9411
9412 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9413 {
9414         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9415         struct net_device *dev = info->user_ptr[1];
9416
9417         return cfg80211_leave_mesh(rdev, dev);
9418 }
9419
9420 #ifdef CONFIG_PM
9421 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9422                                         struct cfg80211_registered_device *rdev)
9423 {
9424         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9425         struct nlattr *nl_pats, *nl_pat;
9426         int i, pat_len;
9427
9428         if (!wowlan->n_patterns)
9429                 return 0;
9430
9431         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9432         if (!nl_pats)
9433                 return -ENOBUFS;
9434
9435         for (i = 0; i < wowlan->n_patterns; i++) {
9436                 nl_pat = nla_nest_start(msg, i + 1);
9437                 if (!nl_pat)
9438                         return -ENOBUFS;
9439                 pat_len = wowlan->patterns[i].pattern_len;
9440                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9441                             wowlan->patterns[i].mask) ||
9442                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9443                             wowlan->patterns[i].pattern) ||
9444                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9445                                 wowlan->patterns[i].pkt_offset))
9446                         return -ENOBUFS;
9447                 nla_nest_end(msg, nl_pat);
9448         }
9449         nla_nest_end(msg, nl_pats);
9450
9451         return 0;
9452 }
9453
9454 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9455                                    struct cfg80211_wowlan_tcp *tcp)
9456 {
9457         struct nlattr *nl_tcp;
9458
9459         if (!tcp)
9460                 return 0;
9461
9462         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9463         if (!nl_tcp)
9464                 return -ENOBUFS;
9465
9466         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9467             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9468             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9469             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9470             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9471             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9472                     tcp->payload_len, tcp->payload) ||
9473             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9474                         tcp->data_interval) ||
9475             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9476                     tcp->wake_len, tcp->wake_data) ||
9477             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9478                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9479                 return -ENOBUFS;
9480
9481         if (tcp->payload_seq.len &&
9482             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9483                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9484                 return -ENOBUFS;
9485
9486         if (tcp->payload_tok.len &&
9487             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9488                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9489                     &tcp->payload_tok))
9490                 return -ENOBUFS;
9491
9492         nla_nest_end(msg, nl_tcp);
9493
9494         return 0;
9495 }
9496
9497 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9498                                   struct cfg80211_sched_scan_request *req)
9499 {
9500         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9501         int i;
9502
9503         if (!req)
9504                 return 0;
9505
9506         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9507         if (!nd)
9508                 return -ENOBUFS;
9509
9510         if (req->n_scan_plans == 1 &&
9511             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9512                         req->scan_plans[0].interval * 1000))
9513                 return -ENOBUFS;
9514
9515         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9516                 return -ENOBUFS;
9517
9518         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9519         if (!freqs)
9520                 return -ENOBUFS;
9521
9522         for (i = 0; i < req->n_channels; i++) {
9523                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9524                         return -ENOBUFS;
9525         }
9526
9527         nla_nest_end(msg, freqs);
9528
9529         if (req->n_match_sets) {
9530                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9531                 if (!matches)
9532                         return -ENOBUFS;
9533
9534                 for (i = 0; i < req->n_match_sets; i++) {
9535                         match = nla_nest_start(msg, i);
9536                         if (!match)
9537                                 return -ENOBUFS;
9538
9539                         if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9540                                     req->match_sets[i].ssid.ssid_len,
9541                                     req->match_sets[i].ssid.ssid))
9542                                 return -ENOBUFS;
9543                         nla_nest_end(msg, match);
9544                 }
9545                 nla_nest_end(msg, matches);
9546         }
9547
9548         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9549         if (!scan_plans)
9550                 return -ENOBUFS;
9551
9552         for (i = 0; i < req->n_scan_plans; i++) {
9553                 scan_plan = nla_nest_start(msg, i + 1);
9554                 if (!scan_plan)
9555                         return -ENOBUFS;
9556
9557                 if (!scan_plan ||
9558                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9559                                 req->scan_plans[i].interval) ||
9560                     (req->scan_plans[i].iterations &&
9561                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9562                                  req->scan_plans[i].iterations)))
9563                         return -ENOBUFS;
9564                 nla_nest_end(msg, scan_plan);
9565         }
9566         nla_nest_end(msg, scan_plans);
9567
9568         nla_nest_end(msg, nd);
9569
9570         return 0;
9571 }
9572
9573 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9574 {
9575         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9576         struct sk_buff *msg;
9577         void *hdr;
9578         u32 size = NLMSG_DEFAULT_SIZE;
9579
9580         if (!rdev->wiphy.wowlan)
9581                 return -EOPNOTSUPP;
9582
9583         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9584                 /* adjust size to have room for all the data */
9585                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9586                         rdev->wiphy.wowlan_config->tcp->payload_len +
9587                         rdev->wiphy.wowlan_config->tcp->wake_len +
9588                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9589         }
9590
9591         msg = nlmsg_new(size, GFP_KERNEL);
9592         if (!msg)
9593                 return -ENOMEM;
9594
9595         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9596                              NL80211_CMD_GET_WOWLAN);
9597         if (!hdr)
9598                 goto nla_put_failure;
9599
9600         if (rdev->wiphy.wowlan_config) {
9601                 struct nlattr *nl_wowlan;
9602
9603                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9604                 if (!nl_wowlan)
9605                         goto nla_put_failure;
9606
9607                 if ((rdev->wiphy.wowlan_config->any &&
9608                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9609                     (rdev->wiphy.wowlan_config->disconnect &&
9610                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9611                     (rdev->wiphy.wowlan_config->magic_pkt &&
9612                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9613                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9614                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9615                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9616                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9617                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9618                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9619                     (rdev->wiphy.wowlan_config->rfkill_release &&
9620                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9621                         goto nla_put_failure;
9622
9623                 if (nl80211_send_wowlan_patterns(msg, rdev))
9624                         goto nla_put_failure;
9625
9626                 if (nl80211_send_wowlan_tcp(msg,
9627                                             rdev->wiphy.wowlan_config->tcp))
9628                         goto nla_put_failure;
9629
9630                 if (nl80211_send_wowlan_nd(
9631                             msg,
9632                             rdev->wiphy.wowlan_config->nd_config))
9633                         goto nla_put_failure;
9634
9635                 nla_nest_end(msg, nl_wowlan);
9636         }
9637
9638         genlmsg_end(msg, hdr);
9639         return genlmsg_reply(msg, info);
9640
9641 nla_put_failure:
9642         nlmsg_free(msg);
9643         return -ENOBUFS;
9644 }
9645
9646 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9647                                     struct nlattr *attr,
9648                                     struct cfg80211_wowlan *trig)
9649 {
9650         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9651         struct cfg80211_wowlan_tcp *cfg;
9652         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9653         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9654         u32 size;
9655         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9656         int err, port;
9657
9658         if (!rdev->wiphy.wowlan->tcp)
9659                 return -EINVAL;
9660
9661         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9662                         nla_data(attr), nla_len(attr),
9663                         nl80211_wowlan_tcp_policy);
9664         if (err)
9665                 return err;
9666
9667         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9668             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9669             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9670             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9671             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9672             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9673             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9674             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9675                 return -EINVAL;
9676
9677         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9678         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9679                 return -EINVAL;
9680
9681         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9682                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9683             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9684                 return -EINVAL;
9685
9686         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9687         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9688                 return -EINVAL;
9689
9690         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9691         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9692                 return -EINVAL;
9693
9694         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9695                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9696
9697                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9698                 tokens_size = tokln - sizeof(*tok);
9699
9700                 if (!tok->len || tokens_size % tok->len)
9701                         return -EINVAL;
9702                 if (!rdev->wiphy.wowlan->tcp->tok)
9703                         return -EINVAL;
9704                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9705                         return -EINVAL;
9706                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9707                         return -EINVAL;
9708                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9709                         return -EINVAL;
9710                 if (tok->offset + tok->len > data_size)
9711                         return -EINVAL;
9712         }
9713
9714         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9715                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9716                 if (!rdev->wiphy.wowlan->tcp->seq)
9717                         return -EINVAL;
9718                 if (seq->len == 0 || seq->len > 4)
9719                         return -EINVAL;
9720                 if (seq->len + seq->offset > data_size)
9721                         return -EINVAL;
9722         }
9723
9724         size = sizeof(*cfg);
9725         size += data_size;
9726         size += wake_size + wake_mask_size;
9727         size += tokens_size;
9728
9729         cfg = kzalloc(size, GFP_KERNEL);
9730         if (!cfg)
9731                 return -ENOMEM;
9732         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9733         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9734         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9735                ETH_ALEN);
9736         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9737                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9738         else
9739                 port = 0;
9740 #ifdef CONFIG_INET
9741         /* allocate a socket and port for it and use it */
9742         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9743                             IPPROTO_TCP, &cfg->sock, 1);
9744         if (err) {
9745                 kfree(cfg);
9746                 return err;
9747         }
9748         if (inet_csk_get_port(cfg->sock->sk, port)) {
9749                 sock_release(cfg->sock);
9750                 kfree(cfg);
9751                 return -EADDRINUSE;
9752         }
9753         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9754 #else
9755         if (!port) {
9756                 kfree(cfg);
9757                 return -EINVAL;
9758         }
9759         cfg->src_port = port;
9760 #endif
9761
9762         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9763         cfg->payload_len = data_size;
9764         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9765         memcpy((void *)cfg->payload,
9766                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9767                data_size);
9768         if (seq)
9769                 cfg->payload_seq = *seq;
9770         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9771         cfg->wake_len = wake_size;
9772         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9773         memcpy((void *)cfg->wake_data,
9774                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9775                wake_size);
9776         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9777                          data_size + wake_size;
9778         memcpy((void *)cfg->wake_mask,
9779                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9780                wake_mask_size);
9781         if (tok) {
9782                 cfg->tokens_size = tokens_size;
9783                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9784         }
9785
9786         trig->tcp = cfg;
9787
9788         return 0;
9789 }
9790
9791 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9792                                    const struct wiphy_wowlan_support *wowlan,
9793                                    struct nlattr *attr,
9794                                    struct cfg80211_wowlan *trig)
9795 {
9796         struct nlattr **tb;
9797         int err;
9798
9799         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9800         if (!tb)
9801                 return -ENOMEM;
9802
9803         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9804                 err = -EOPNOTSUPP;
9805                 goto out;
9806         }
9807
9808         err = nla_parse(tb, NL80211_ATTR_MAX,
9809                         nla_data(attr), nla_len(attr),
9810                         nl80211_policy);
9811         if (err)
9812                 goto out;
9813
9814         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9815         err = PTR_ERR_OR_ZERO(trig->nd_config);
9816         if (err)
9817                 trig->nd_config = NULL;
9818
9819 out:
9820         kfree(tb);
9821         return err;
9822 }
9823
9824 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9825 {
9826         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9827         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9828         struct cfg80211_wowlan new_triggers = {};
9829         struct cfg80211_wowlan *ntrig;
9830         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9831         int err, i;
9832         bool prev_enabled = rdev->wiphy.wowlan_config;
9833         bool regular = false;
9834
9835         if (!wowlan)
9836                 return -EOPNOTSUPP;
9837
9838         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9839                 cfg80211_rdev_free_wowlan(rdev);
9840                 rdev->wiphy.wowlan_config = NULL;
9841                 goto set_wakeup;
9842         }
9843
9844         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9845                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9846                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9847                         nl80211_wowlan_policy);
9848         if (err)
9849                 return err;
9850
9851         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9852                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9853                         return -EINVAL;
9854                 new_triggers.any = true;
9855         }
9856
9857         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9858                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9859                         return -EINVAL;
9860                 new_triggers.disconnect = true;
9861                 regular = true;
9862         }
9863
9864         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9865                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9866                         return -EINVAL;
9867                 new_triggers.magic_pkt = true;
9868                 regular = true;
9869         }
9870
9871         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9872                 return -EINVAL;
9873
9874         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9875                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9876                         return -EINVAL;
9877                 new_triggers.gtk_rekey_failure = true;
9878                 regular = true;
9879         }
9880
9881         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9882                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9883                         return -EINVAL;
9884                 new_triggers.eap_identity_req = true;
9885                 regular = true;
9886         }
9887
9888         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9889                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9890                         return -EINVAL;
9891                 new_triggers.four_way_handshake = true;
9892                 regular = true;
9893         }
9894
9895         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9896                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9897                         return -EINVAL;
9898                 new_triggers.rfkill_release = true;
9899                 regular = true;
9900         }
9901
9902         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9903                 struct nlattr *pat;
9904                 int n_patterns = 0;
9905                 int rem, pat_len, mask_len, pkt_offset;
9906                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9907
9908                 regular = true;
9909
9910                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9911                                     rem)
9912                         n_patterns++;
9913                 if (n_patterns > wowlan->n_patterns)
9914                         return -EINVAL;
9915
9916                 new_triggers.patterns = kcalloc(n_patterns,
9917                                                 sizeof(new_triggers.patterns[0]),
9918                                                 GFP_KERNEL);
9919                 if (!new_triggers.patterns)
9920                         return -ENOMEM;
9921
9922                 new_triggers.n_patterns = n_patterns;
9923                 i = 0;
9924
9925                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9926                                     rem) {
9927                         u8 *mask_pat;
9928
9929                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9930                                   nla_len(pat), NULL);
9931                         err = -EINVAL;
9932                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9933                             !pat_tb[NL80211_PKTPAT_PATTERN])
9934                                 goto error;
9935                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9936                         mask_len = DIV_ROUND_UP(pat_len, 8);
9937                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9938                                 goto error;
9939                         if (pat_len > wowlan->pattern_max_len ||
9940                             pat_len < wowlan->pattern_min_len)
9941                                 goto error;
9942
9943                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9944                                 pkt_offset = 0;
9945                         else
9946                                 pkt_offset = nla_get_u32(
9947                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9948                         if (pkt_offset > wowlan->max_pkt_offset)
9949                                 goto error;
9950                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9951
9952                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9953                         if (!mask_pat) {
9954                                 err = -ENOMEM;
9955                                 goto error;
9956                         }
9957                         new_triggers.patterns[i].mask = mask_pat;
9958                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9959                                mask_len);
9960                         mask_pat += mask_len;
9961                         new_triggers.patterns[i].pattern = mask_pat;
9962                         new_triggers.patterns[i].pattern_len = pat_len;
9963                         memcpy(mask_pat,
9964                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9965                                pat_len);
9966                         i++;
9967                 }
9968         }
9969
9970         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9971                 regular = true;
9972                 err = nl80211_parse_wowlan_tcp(
9973                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9974                         &new_triggers);
9975                 if (err)
9976                         goto error;
9977         }
9978
9979         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9980                 regular = true;
9981                 err = nl80211_parse_wowlan_nd(
9982                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9983                         &new_triggers);
9984                 if (err)
9985                         goto error;
9986         }
9987
9988         /* The 'any' trigger means the device continues operating more or less
9989          * as in its normal operation mode and wakes up the host on most of the
9990          * normal interrupts (like packet RX, ...)
9991          * It therefore makes little sense to combine with the more constrained
9992          * wakeup trigger modes.
9993          */
9994         if (new_triggers.any && regular) {
9995                 err = -EINVAL;
9996                 goto error;
9997         }
9998
9999         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
10000         if (!ntrig) {
10001                 err = -ENOMEM;
10002                 goto error;
10003         }
10004         cfg80211_rdev_free_wowlan(rdev);
10005         rdev->wiphy.wowlan_config = ntrig;
10006
10007  set_wakeup:
10008         if (rdev->ops->set_wakeup &&
10009             prev_enabled != !!rdev->wiphy.wowlan_config)
10010                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
10011
10012         return 0;
10013  error:
10014         for (i = 0; i < new_triggers.n_patterns; i++)
10015                 kfree(new_triggers.patterns[i].mask);
10016         kfree(new_triggers.patterns);
10017         if (new_triggers.tcp && new_triggers.tcp->sock)
10018                 sock_release(new_triggers.tcp->sock);
10019         kfree(new_triggers.tcp);
10020         kfree(new_triggers.nd_config);
10021         return err;
10022 }
10023 #endif
10024
10025 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
10026                                        struct cfg80211_registered_device *rdev)
10027 {
10028         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
10029         int i, j, pat_len;
10030         struct cfg80211_coalesce_rules *rule;
10031
10032         if (!rdev->coalesce->n_rules)
10033                 return 0;
10034
10035         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
10036         if (!nl_rules)
10037                 return -ENOBUFS;
10038
10039         for (i = 0; i < rdev->coalesce->n_rules; i++) {
10040                 nl_rule = nla_nest_start(msg, i + 1);
10041                 if (!nl_rule)
10042                         return -ENOBUFS;
10043
10044                 rule = &rdev->coalesce->rules[i];
10045                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
10046                                 rule->delay))
10047                         return -ENOBUFS;
10048
10049                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
10050                                 rule->condition))
10051                         return -ENOBUFS;
10052
10053                 nl_pats = nla_nest_start(msg,
10054                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
10055                 if (!nl_pats)
10056                         return -ENOBUFS;
10057
10058                 for (j = 0; j < rule->n_patterns; j++) {
10059                         nl_pat = nla_nest_start(msg, j + 1);
10060                         if (!nl_pat)
10061                                 return -ENOBUFS;
10062                         pat_len = rule->patterns[j].pattern_len;
10063                         if (nla_put(msg, NL80211_PKTPAT_MASK,
10064                                     DIV_ROUND_UP(pat_len, 8),
10065                                     rule->patterns[j].mask) ||
10066                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10067                                     rule->patterns[j].pattern) ||
10068                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10069                                         rule->patterns[j].pkt_offset))
10070                                 return -ENOBUFS;
10071                         nla_nest_end(msg, nl_pat);
10072                 }
10073                 nla_nest_end(msg, nl_pats);
10074                 nla_nest_end(msg, nl_rule);
10075         }
10076         nla_nest_end(msg, nl_rules);
10077
10078         return 0;
10079 }
10080
10081 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
10082 {
10083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10084         struct sk_buff *msg;
10085         void *hdr;
10086
10087         if (!rdev->wiphy.coalesce)
10088                 return -EOPNOTSUPP;
10089
10090         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10091         if (!msg)
10092                 return -ENOMEM;
10093
10094         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10095                              NL80211_CMD_GET_COALESCE);
10096         if (!hdr)
10097                 goto nla_put_failure;
10098
10099         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
10100                 goto nla_put_failure;
10101
10102         genlmsg_end(msg, hdr);
10103         return genlmsg_reply(msg, info);
10104
10105 nla_put_failure:
10106         nlmsg_free(msg);
10107         return -ENOBUFS;
10108 }
10109
10110 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
10111 {
10112         struct cfg80211_coalesce *coalesce = rdev->coalesce;
10113         int i, j;
10114         struct cfg80211_coalesce_rules *rule;
10115
10116         if (!coalesce)
10117                 return;
10118
10119         for (i = 0; i < coalesce->n_rules; i++) {
10120                 rule = &coalesce->rules[i];
10121                 for (j = 0; j < rule->n_patterns; j++)
10122                         kfree(rule->patterns[j].mask);
10123                 kfree(rule->patterns);
10124         }
10125         kfree(coalesce->rules);
10126         kfree(coalesce);
10127         rdev->coalesce = NULL;
10128 }
10129
10130 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10131                                        struct nlattr *rule,
10132                                        struct cfg80211_coalesce_rules *new_rule)
10133 {
10134         int err, i;
10135         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10136         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10137         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10138         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10139
10140         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
10141                         nla_len(rule), nl80211_coalesce_policy);
10142         if (err)
10143                 return err;
10144
10145         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10146                 new_rule->delay =
10147                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10148         if (new_rule->delay > coalesce->max_delay)
10149                 return -EINVAL;
10150
10151         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10152                 new_rule->condition =
10153                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10154         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10155             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10156                 return -EINVAL;
10157
10158         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10159                 return -EINVAL;
10160
10161         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10162                             rem)
10163                 n_patterns++;
10164         if (n_patterns > coalesce->n_patterns)
10165                 return -EINVAL;
10166
10167         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10168                                      GFP_KERNEL);
10169         if (!new_rule->patterns)
10170                 return -ENOMEM;
10171
10172         new_rule->n_patterns = n_patterns;
10173         i = 0;
10174
10175         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10176                             rem) {
10177                 u8 *mask_pat;
10178
10179                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
10180                           nla_len(pat), NULL);
10181                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10182                     !pat_tb[NL80211_PKTPAT_PATTERN])
10183                         return -EINVAL;
10184                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10185                 mask_len = DIV_ROUND_UP(pat_len, 8);
10186                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10187                         return -EINVAL;
10188                 if (pat_len > coalesce->pattern_max_len ||
10189                     pat_len < coalesce->pattern_min_len)
10190                         return -EINVAL;
10191
10192                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10193                         pkt_offset = 0;
10194                 else
10195                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10196                 if (pkt_offset > coalesce->max_pkt_offset)
10197                         return -EINVAL;
10198                 new_rule->patterns[i].pkt_offset = pkt_offset;
10199
10200                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10201                 if (!mask_pat)
10202                         return -ENOMEM;
10203
10204                 new_rule->patterns[i].mask = mask_pat;
10205                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10206                        mask_len);
10207
10208                 mask_pat += mask_len;
10209                 new_rule->patterns[i].pattern = mask_pat;
10210                 new_rule->patterns[i].pattern_len = pat_len;
10211                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10212                        pat_len);
10213                 i++;
10214         }
10215
10216         return 0;
10217 }
10218
10219 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10220 {
10221         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10222         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10223         struct cfg80211_coalesce new_coalesce = {};
10224         struct cfg80211_coalesce *n_coalesce;
10225         int err, rem_rule, n_rules = 0, i, j;
10226         struct nlattr *rule;
10227         struct cfg80211_coalesce_rules *tmp_rule;
10228
10229         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10230                 return -EOPNOTSUPP;
10231
10232         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10233                 cfg80211_rdev_free_coalesce(rdev);
10234                 rdev_set_coalesce(rdev, NULL);
10235                 return 0;
10236         }
10237
10238         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10239                             rem_rule)
10240                 n_rules++;
10241         if (n_rules > coalesce->n_rules)
10242                 return -EINVAL;
10243
10244         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10245                                      GFP_KERNEL);
10246         if (!new_coalesce.rules)
10247                 return -ENOMEM;
10248
10249         new_coalesce.n_rules = n_rules;
10250         i = 0;
10251
10252         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10253                             rem_rule) {
10254                 err = nl80211_parse_coalesce_rule(rdev, rule,
10255                                                   &new_coalesce.rules[i]);
10256                 if (err)
10257                         goto error;
10258
10259                 i++;
10260         }
10261
10262         err = rdev_set_coalesce(rdev, &new_coalesce);
10263         if (err)
10264                 goto error;
10265
10266         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10267         if (!n_coalesce) {
10268                 err = -ENOMEM;
10269                 goto error;
10270         }
10271         cfg80211_rdev_free_coalesce(rdev);
10272         rdev->coalesce = n_coalesce;
10273
10274         return 0;
10275 error:
10276         for (i = 0; i < new_coalesce.n_rules; i++) {
10277                 tmp_rule = &new_coalesce.rules[i];
10278                 for (j = 0; j < tmp_rule->n_patterns; j++)
10279                         kfree(tmp_rule->patterns[j].mask);
10280                 kfree(tmp_rule->patterns);
10281         }
10282         kfree(new_coalesce.rules);
10283
10284         return err;
10285 }
10286
10287 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10288 {
10289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10290         struct net_device *dev = info->user_ptr[1];
10291         struct wireless_dev *wdev = dev->ieee80211_ptr;
10292         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10293         struct cfg80211_gtk_rekey_data rekey_data;
10294         int err;
10295
10296         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10297                 return -EINVAL;
10298
10299         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10300                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10301                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10302                         nl80211_rekey_policy);
10303         if (err)
10304                 return err;
10305
10306         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10307                 return -ERANGE;
10308         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10309                 return -ERANGE;
10310         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10311                 return -ERANGE;
10312
10313         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10314         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10315         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10316
10317         wdev_lock(wdev);
10318         if (!wdev->current_bss) {
10319                 err = -ENOTCONN;
10320                 goto out;
10321         }
10322
10323         if (!rdev->ops->set_rekey_data) {
10324                 err = -EOPNOTSUPP;
10325                 goto out;
10326         }
10327
10328         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10329  out:
10330         wdev_unlock(wdev);
10331         return err;
10332 }
10333
10334 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10335                                              struct genl_info *info)
10336 {
10337         struct net_device *dev = info->user_ptr[1];
10338         struct wireless_dev *wdev = dev->ieee80211_ptr;
10339
10340         if (wdev->iftype != NL80211_IFTYPE_AP &&
10341             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10342                 return -EINVAL;
10343
10344         if (wdev->ap_unexpected_nlportid)
10345                 return -EBUSY;
10346
10347         wdev->ap_unexpected_nlportid = info->snd_portid;
10348         return 0;
10349 }
10350
10351 static int nl80211_probe_client(struct sk_buff *skb,
10352                                 struct genl_info *info)
10353 {
10354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10355         struct net_device *dev = info->user_ptr[1];
10356         struct wireless_dev *wdev = dev->ieee80211_ptr;
10357         struct sk_buff *msg;
10358         void *hdr;
10359         const u8 *addr;
10360         u64 cookie;
10361         int err;
10362
10363         if (wdev->iftype != NL80211_IFTYPE_AP &&
10364             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10365                 return -EOPNOTSUPP;
10366
10367         if (!info->attrs[NL80211_ATTR_MAC])
10368                 return -EINVAL;
10369
10370         if (!rdev->ops->probe_client)
10371                 return -EOPNOTSUPP;
10372
10373         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10374         if (!msg)
10375                 return -ENOMEM;
10376
10377         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10378                              NL80211_CMD_PROBE_CLIENT);
10379         if (!hdr) {
10380                 err = -ENOBUFS;
10381                 goto free_msg;
10382         }
10383
10384         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10385
10386         err = rdev_probe_client(rdev, dev, addr, &cookie);
10387         if (err)
10388                 goto free_msg;
10389
10390         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10391                               NL80211_ATTR_PAD))
10392                 goto nla_put_failure;
10393
10394         genlmsg_end(msg, hdr);
10395
10396         return genlmsg_reply(msg, info);
10397
10398  nla_put_failure:
10399         err = -ENOBUFS;
10400  free_msg:
10401         nlmsg_free(msg);
10402         return err;
10403 }
10404
10405 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10406 {
10407         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10408         struct cfg80211_beacon_registration *reg, *nreg;
10409         int rv;
10410
10411         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10412                 return -EOPNOTSUPP;
10413
10414         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10415         if (!nreg)
10416                 return -ENOMEM;
10417
10418         /* First, check if already registered. */
10419         spin_lock_bh(&rdev->beacon_registrations_lock);
10420         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10421                 if (reg->nlportid == info->snd_portid) {
10422                         rv = -EALREADY;
10423                         goto out_err;
10424                 }
10425         }
10426         /* Add it to the list */
10427         nreg->nlportid = info->snd_portid;
10428         list_add(&nreg->list, &rdev->beacon_registrations);
10429
10430         spin_unlock_bh(&rdev->beacon_registrations_lock);
10431
10432         return 0;
10433 out_err:
10434         spin_unlock_bh(&rdev->beacon_registrations_lock);
10435         kfree(nreg);
10436         return rv;
10437 }
10438
10439 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10440 {
10441         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10442         struct wireless_dev *wdev = info->user_ptr[1];
10443         int err;
10444
10445         if (!rdev->ops->start_p2p_device)
10446                 return -EOPNOTSUPP;
10447
10448         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10449                 return -EOPNOTSUPP;
10450
10451         if (wdev->p2p_started)
10452                 return 0;
10453
10454         if (rfkill_blocked(rdev->rfkill))
10455                 return -ERFKILL;
10456
10457         err = rdev_start_p2p_device(rdev, wdev);
10458         if (err)
10459                 return err;
10460
10461         wdev->p2p_started = true;
10462         rdev->opencount++;
10463
10464         return 0;
10465 }
10466
10467 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10468 {
10469         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10470         struct wireless_dev *wdev = info->user_ptr[1];
10471
10472         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10473                 return -EOPNOTSUPP;
10474
10475         if (!rdev->ops->stop_p2p_device)
10476                 return -EOPNOTSUPP;
10477
10478         cfg80211_stop_p2p_device(rdev, wdev);
10479
10480         return 0;
10481 }
10482
10483 static int nl80211_get_protocol_features(struct sk_buff *skb,
10484                                          struct genl_info *info)
10485 {
10486         void *hdr;
10487         struct sk_buff *msg;
10488
10489         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10490         if (!msg)
10491                 return -ENOMEM;
10492
10493         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10494                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10495         if (!hdr)
10496                 goto nla_put_failure;
10497
10498         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10499                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10500                 goto nla_put_failure;
10501
10502         genlmsg_end(msg, hdr);
10503         return genlmsg_reply(msg, info);
10504
10505  nla_put_failure:
10506         kfree_skb(msg);
10507         return -ENOBUFS;
10508 }
10509
10510 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10511 {
10512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10513         struct cfg80211_update_ft_ies_params ft_params;
10514         struct net_device *dev = info->user_ptr[1];
10515
10516         if (!rdev->ops->update_ft_ies)
10517                 return -EOPNOTSUPP;
10518
10519         if (!info->attrs[NL80211_ATTR_MDID] ||
10520             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10521                 return -EINVAL;
10522
10523         memset(&ft_params, 0, sizeof(ft_params));
10524         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10525         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10526         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10527
10528         return rdev_update_ft_ies(rdev, dev, &ft_params);
10529 }
10530
10531 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10532                                        struct genl_info *info)
10533 {
10534         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10535         struct wireless_dev *wdev = info->user_ptr[1];
10536         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10537         u16 duration;
10538         int ret;
10539
10540         if (!rdev->ops->crit_proto_start)
10541                 return -EOPNOTSUPP;
10542
10543         if (WARN_ON(!rdev->ops->crit_proto_stop))
10544                 return -EINVAL;
10545
10546         if (rdev->crit_proto_nlportid)
10547                 return -EBUSY;
10548
10549         /* determine protocol if provided */
10550         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10551                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10552
10553         if (proto >= NUM_NL80211_CRIT_PROTO)
10554                 return -EINVAL;
10555
10556         /* timeout must be provided */
10557         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10558                 return -EINVAL;
10559
10560         duration =
10561                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10562
10563         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10564                 return -ERANGE;
10565
10566         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10567         if (!ret)
10568                 rdev->crit_proto_nlportid = info->snd_portid;
10569
10570         return ret;
10571 }
10572
10573 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10574                                       struct genl_info *info)
10575 {
10576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10577         struct wireless_dev *wdev = info->user_ptr[1];
10578
10579         if (!rdev->ops->crit_proto_stop)
10580                 return -EOPNOTSUPP;
10581
10582         if (rdev->crit_proto_nlportid) {
10583                 rdev->crit_proto_nlportid = 0;
10584                 rdev_crit_proto_stop(rdev, wdev);
10585         }
10586         return 0;
10587 }
10588
10589 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10590 {
10591         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10592         struct wireless_dev *wdev =
10593                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10594         int i, err;
10595         u32 vid, subcmd;
10596
10597         if (!rdev->wiphy.vendor_commands)
10598                 return -EOPNOTSUPP;
10599
10600         if (IS_ERR(wdev)) {
10601                 err = PTR_ERR(wdev);
10602                 if (err != -EINVAL)
10603                         return err;
10604                 wdev = NULL;
10605         } else if (wdev->wiphy != &rdev->wiphy) {
10606                 return -EINVAL;
10607         }
10608
10609         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10610             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10611                 return -EINVAL;
10612
10613         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10614         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10615         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10616                 const struct wiphy_vendor_command *vcmd;
10617                 void *data = NULL;
10618                 int len = 0;
10619
10620                 vcmd = &rdev->wiphy.vendor_commands[i];
10621
10622                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10623                         continue;
10624
10625                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10626                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10627                         if (!wdev)
10628                                 return -EINVAL;
10629                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10630                             !wdev->netdev)
10631                                 return -EINVAL;
10632
10633                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10634                                 if (wdev->netdev &&
10635                                     !netif_running(wdev->netdev))
10636                                         return -ENETDOWN;
10637                                 if (!wdev->netdev && !wdev->p2p_started)
10638                                         return -ENETDOWN;
10639                         }
10640
10641                         if (!vcmd->doit)
10642                                 return -EOPNOTSUPP;
10643                 } else {
10644                         wdev = NULL;
10645                 }
10646
10647                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10648                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10649                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10650                 }
10651
10652                 rdev->cur_cmd_info = info;
10653                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10654                                                           data, len);
10655                 rdev->cur_cmd_info = NULL;
10656                 return err;
10657         }
10658
10659         return -EOPNOTSUPP;
10660 }
10661
10662 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10663                                        struct netlink_callback *cb,
10664                                        struct cfg80211_registered_device **rdev,
10665                                        struct wireless_dev **wdev)
10666 {
10667         u32 vid, subcmd;
10668         unsigned int i;
10669         int vcmd_idx = -1;
10670         int err;
10671         void *data = NULL;
10672         unsigned int data_len = 0;
10673
10674         rtnl_lock();
10675
10676         if (cb->args[0]) {
10677                 /* subtract the 1 again here */
10678                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10679                 struct wireless_dev *tmp;
10680
10681                 if (!wiphy) {
10682                         err = -ENODEV;
10683                         goto out_unlock;
10684                 }
10685                 *rdev = wiphy_to_rdev(wiphy);
10686                 *wdev = NULL;
10687
10688                 if (cb->args[1]) {
10689                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
10690                                 if (tmp->identifier == cb->args[1] - 1) {
10691                                         *wdev = tmp;
10692                                         break;
10693                                 }
10694                         }
10695                 }
10696
10697                 /* keep rtnl locked in successful case */
10698                 return 0;
10699         }
10700
10701         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10702                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10703                           nl80211_policy);
10704         if (err)
10705                 goto out_unlock;
10706
10707         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10708             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10709                 err = -EINVAL;
10710                 goto out_unlock;
10711         }
10712
10713         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10714                                            nl80211_fam.attrbuf);
10715         if (IS_ERR(*wdev))
10716                 *wdev = NULL;
10717
10718         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10719                                            nl80211_fam.attrbuf);
10720         if (IS_ERR(*rdev)) {
10721                 err = PTR_ERR(*rdev);
10722                 goto out_unlock;
10723         }
10724
10725         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10726         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10727
10728         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10729                 const struct wiphy_vendor_command *vcmd;
10730
10731                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10732
10733                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10734                         continue;
10735
10736                 if (!vcmd->dumpit) {
10737                         err = -EOPNOTSUPP;
10738                         goto out_unlock;
10739                 }
10740
10741                 vcmd_idx = i;
10742                 break;
10743         }
10744
10745         if (vcmd_idx < 0) {
10746                 err = -EOPNOTSUPP;
10747                 goto out_unlock;
10748         }
10749
10750         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10751                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10752                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10753         }
10754
10755         /* 0 is the first index - add 1 to parse only once */
10756         cb->args[0] = (*rdev)->wiphy_idx + 1;
10757         /* add 1 to know if it was NULL */
10758         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10759         cb->args[2] = vcmd_idx;
10760         cb->args[3] = (unsigned long)data;
10761         cb->args[4] = data_len;
10762
10763         /* keep rtnl locked in successful case */
10764         return 0;
10765  out_unlock:
10766         rtnl_unlock();
10767         return err;
10768 }
10769
10770 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10771                                    struct netlink_callback *cb)
10772 {
10773         struct cfg80211_registered_device *rdev;
10774         struct wireless_dev *wdev;
10775         unsigned int vcmd_idx;
10776         const struct wiphy_vendor_command *vcmd;
10777         void *data;
10778         int data_len;
10779         int err;
10780         struct nlattr *vendor_data;
10781
10782         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10783         if (err)
10784                 return err;
10785
10786         vcmd_idx = cb->args[2];
10787         data = (void *)cb->args[3];
10788         data_len = cb->args[4];
10789         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10790
10791         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10792                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10793                 if (!wdev)
10794                         return -EINVAL;
10795                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10796                     !wdev->netdev)
10797                         return -EINVAL;
10798
10799                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10800                         if (wdev->netdev &&
10801                             !netif_running(wdev->netdev))
10802                                 return -ENETDOWN;
10803                         if (!wdev->netdev && !wdev->p2p_started)
10804                                 return -ENETDOWN;
10805                 }
10806         }
10807
10808         while (1) {
10809                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10810                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10811                                            NL80211_CMD_VENDOR);
10812                 if (!hdr)
10813                         break;
10814
10815                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10816                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10817                                                wdev_id(wdev),
10818                                                NL80211_ATTR_PAD))) {
10819                         genlmsg_cancel(skb, hdr);
10820                         break;
10821                 }
10822
10823                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10824                 if (!vendor_data) {
10825                         genlmsg_cancel(skb, hdr);
10826                         break;
10827                 }
10828
10829                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10830                                    (unsigned long *)&cb->args[5]);
10831                 nla_nest_end(skb, vendor_data);
10832
10833                 if (err == -ENOBUFS || err == -ENOENT) {
10834                         genlmsg_cancel(skb, hdr);
10835                         break;
10836                 } else if (err) {
10837                         genlmsg_cancel(skb, hdr);
10838                         goto out;
10839                 }
10840
10841                 genlmsg_end(skb, hdr);
10842         }
10843
10844         err = skb->len;
10845  out:
10846         rtnl_unlock();
10847         return err;
10848 }
10849
10850 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10851                                            enum nl80211_commands cmd,
10852                                            enum nl80211_attrs attr,
10853                                            int approxlen)
10854 {
10855         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10856
10857         if (WARN_ON(!rdev->cur_cmd_info))
10858                 return NULL;
10859
10860         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10861                                            rdev->cur_cmd_info->snd_portid,
10862                                            rdev->cur_cmd_info->snd_seq,
10863                                            cmd, attr, NULL, GFP_KERNEL);
10864 }
10865 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10866
10867 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10868 {
10869         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10870         void *hdr = ((void **)skb->cb)[1];
10871         struct nlattr *data = ((void **)skb->cb)[2];
10872
10873         /* clear CB data for netlink core to own from now on */
10874         memset(skb->cb, 0, sizeof(skb->cb));
10875
10876         if (WARN_ON(!rdev->cur_cmd_info)) {
10877                 kfree_skb(skb);
10878                 return -EINVAL;
10879         }
10880
10881         nla_nest_end(skb, data);
10882         genlmsg_end(skb, hdr);
10883         return genlmsg_reply(skb, rdev->cur_cmd_info);
10884 }
10885 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10886
10887 static int nl80211_set_qos_map(struct sk_buff *skb,
10888                                struct genl_info *info)
10889 {
10890         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10891         struct cfg80211_qos_map *qos_map = NULL;
10892         struct net_device *dev = info->user_ptr[1];
10893         u8 *pos, len, num_des, des_len, des;
10894         int ret;
10895
10896         if (!rdev->ops->set_qos_map)
10897                 return -EOPNOTSUPP;
10898
10899         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10900                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10901                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10902
10903                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10904                     len > IEEE80211_QOS_MAP_LEN_MAX)
10905                         return -EINVAL;
10906
10907                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10908                 if (!qos_map)
10909                         return -ENOMEM;
10910
10911                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10912                 if (num_des) {
10913                         des_len = num_des *
10914                                 sizeof(struct cfg80211_dscp_exception);
10915                         memcpy(qos_map->dscp_exception, pos, des_len);
10916                         qos_map->num_des = num_des;
10917                         for (des = 0; des < num_des; des++) {
10918                                 if (qos_map->dscp_exception[des].up > 7) {
10919                                         kfree(qos_map);
10920                                         return -EINVAL;
10921                                 }
10922                         }
10923                         pos += des_len;
10924                 }
10925                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10926         }
10927
10928         wdev_lock(dev->ieee80211_ptr);
10929         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10930         if (!ret)
10931                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10932         wdev_unlock(dev->ieee80211_ptr);
10933
10934         kfree(qos_map);
10935         return ret;
10936 }
10937
10938 static int nl80211_add_tx_ts(struct sk_buff *skb, 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 *peer;
10944         u8 tsid, up;
10945         u16 admitted_time = 0;
10946         int err;
10947
10948         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10949                 return -EOPNOTSUPP;
10950
10951         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10952             !info->attrs[NL80211_ATTR_USER_PRIO])
10953                 return -EINVAL;
10954
10955         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10956         if (tsid >= IEEE80211_NUM_TIDS)
10957                 return -EINVAL;
10958
10959         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10960         if (up >= IEEE80211_NUM_UPS)
10961                 return -EINVAL;
10962
10963         /* WMM uses TIDs 0-7 even for TSPEC */
10964         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10965                 /* TODO: handle 802.11 TSPEC/admission control
10966                  * need more attributes for that (e.g. BA session requirement);
10967                  * change the WMM adminssion test above to allow both then
10968                  */
10969                 return -EINVAL;
10970         }
10971
10972         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10973
10974         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10975                 admitted_time =
10976                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10977                 if (!admitted_time)
10978                         return -EINVAL;
10979         }
10980
10981         wdev_lock(wdev);
10982         switch (wdev->iftype) {
10983         case NL80211_IFTYPE_STATION:
10984         case NL80211_IFTYPE_P2P_CLIENT:
10985                 if (wdev->current_bss)
10986                         break;
10987                 err = -ENOTCONN;
10988                 goto out;
10989         default:
10990                 err = -EOPNOTSUPP;
10991                 goto out;
10992         }
10993
10994         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10995
10996  out:
10997         wdev_unlock(wdev);
10998         return err;
10999 }
11000
11001 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
11002 {
11003         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11004         struct net_device *dev = info->user_ptr[1];
11005         struct wireless_dev *wdev = dev->ieee80211_ptr;
11006         const u8 *peer;
11007         u8 tsid;
11008         int err;
11009
11010         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
11011                 return -EINVAL;
11012
11013         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
11014         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
11015
11016         wdev_lock(wdev);
11017         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
11018         wdev_unlock(wdev);
11019
11020         return err;
11021 }
11022
11023 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
11024                                        struct genl_info *info)
11025 {
11026         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11027         struct net_device *dev = info->user_ptr[1];
11028         struct wireless_dev *wdev = dev->ieee80211_ptr;
11029         struct cfg80211_chan_def chandef = {};
11030         const u8 *addr;
11031         u8 oper_class;
11032         int err;
11033
11034         if (!rdev->ops->tdls_channel_switch ||
11035             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
11036                 return -EOPNOTSUPP;
11037
11038         switch (dev->ieee80211_ptr->iftype) {
11039         case NL80211_IFTYPE_STATION:
11040         case NL80211_IFTYPE_P2P_CLIENT:
11041                 break;
11042         default:
11043                 return -EOPNOTSUPP;
11044         }
11045
11046         if (!info->attrs[NL80211_ATTR_MAC] ||
11047             !info->attrs[NL80211_ATTR_OPER_CLASS])
11048                 return -EINVAL;
11049
11050         err = nl80211_parse_chandef(rdev, info, &chandef);
11051         if (err)
11052                 return err;
11053
11054         /*
11055          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
11056          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
11057          * specification is not defined for them.
11058          */
11059         if (chandef.chan->band == NL80211_BAND_2GHZ &&
11060             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
11061             chandef.width != NL80211_CHAN_WIDTH_20)
11062                 return -EINVAL;
11063
11064         /* we will be active on the TDLS link */
11065         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
11066                                            wdev->iftype))
11067                 return -EINVAL;
11068
11069         /* don't allow switching to DFS channels */
11070         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
11071                 return -EINVAL;
11072
11073         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11074         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
11075
11076         wdev_lock(wdev);
11077         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
11078         wdev_unlock(wdev);
11079
11080         return err;
11081 }
11082
11083 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
11084                                               struct genl_info *info)
11085 {
11086         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11087         struct net_device *dev = info->user_ptr[1];
11088         struct wireless_dev *wdev = dev->ieee80211_ptr;
11089         const u8 *addr;
11090
11091         if (!rdev->ops->tdls_channel_switch ||
11092             !rdev->ops->tdls_cancel_channel_switch ||
11093             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
11094                 return -EOPNOTSUPP;
11095
11096         switch (dev->ieee80211_ptr->iftype) {
11097         case NL80211_IFTYPE_STATION:
11098         case NL80211_IFTYPE_P2P_CLIENT:
11099                 break;
11100         default:
11101                 return -EOPNOTSUPP;
11102         }
11103
11104         if (!info->attrs[NL80211_ATTR_MAC])
11105                 return -EINVAL;
11106
11107         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11108
11109         wdev_lock(wdev);
11110         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
11111         wdev_unlock(wdev);
11112
11113         return 0;
11114 }
11115
11116 #define NL80211_FLAG_NEED_WIPHY         0x01
11117 #define NL80211_FLAG_NEED_NETDEV        0x02
11118 #define NL80211_FLAG_NEED_RTNL          0x04
11119 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
11120 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
11121                                          NL80211_FLAG_CHECK_NETDEV_UP)
11122 #define NL80211_FLAG_NEED_WDEV          0x10
11123 /* If a netdev is associated, it must be UP, P2P must be started */
11124 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
11125                                          NL80211_FLAG_CHECK_NETDEV_UP)
11126 #define NL80211_FLAG_CLEAR_SKB          0x20
11127
11128 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
11129                             struct genl_info *info)
11130 {
11131         struct cfg80211_registered_device *rdev;
11132         struct wireless_dev *wdev;
11133         struct net_device *dev;
11134         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
11135
11136         if (rtnl)
11137                 rtnl_lock();
11138
11139         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
11140                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
11141                 if (IS_ERR(rdev)) {
11142                         if (rtnl)
11143                                 rtnl_unlock();
11144                         return PTR_ERR(rdev);
11145                 }
11146                 info->user_ptr[0] = rdev;
11147         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
11148                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11149                 ASSERT_RTNL();
11150
11151                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
11152                                                   info->attrs);
11153                 if (IS_ERR(wdev)) {
11154                         if (rtnl)
11155                                 rtnl_unlock();
11156                         return PTR_ERR(wdev);
11157                 }
11158
11159                 dev = wdev->netdev;
11160                 rdev = wiphy_to_rdev(wdev->wiphy);
11161
11162                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
11163                         if (!dev) {
11164                                 if (rtnl)
11165                                         rtnl_unlock();
11166                                 return -EINVAL;
11167                         }
11168
11169                         info->user_ptr[1] = dev;
11170                 } else {
11171                         info->user_ptr[1] = wdev;
11172                 }
11173
11174                 if (dev) {
11175                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
11176                             !netif_running(dev)) {
11177                                 if (rtnl)
11178                                         rtnl_unlock();
11179                                 return -ENETDOWN;
11180                         }
11181
11182                         dev_hold(dev);
11183                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
11184                         if (!wdev->p2p_started) {
11185                                 if (rtnl)
11186                                         rtnl_unlock();
11187                                 return -ENETDOWN;
11188                         }
11189                 }
11190
11191                 info->user_ptr[0] = rdev;
11192         }
11193
11194         return 0;
11195 }
11196
11197 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
11198                               struct genl_info *info)
11199 {
11200         if (info->user_ptr[1]) {
11201                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11202                         struct wireless_dev *wdev = info->user_ptr[1];
11203
11204                         if (wdev->netdev)
11205                                 dev_put(wdev->netdev);
11206                 } else {
11207                         dev_put(info->user_ptr[1]);
11208                 }
11209         }
11210
11211         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
11212                 rtnl_unlock();
11213
11214         /* If needed, clear the netlink message payload from the SKB
11215          * as it might contain key data that shouldn't stick around on
11216          * the heap after the SKB is freed. The netlink message header
11217          * is still needed for further processing, so leave it intact.
11218          */
11219         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
11220                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
11221
11222                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
11223         }
11224 }
11225
11226 static const struct genl_ops nl80211_ops[] = {
11227         {
11228                 .cmd = NL80211_CMD_GET_WIPHY,
11229                 .doit = nl80211_get_wiphy,
11230                 .dumpit = nl80211_dump_wiphy,
11231                 .done = nl80211_dump_wiphy_done,
11232                 .policy = nl80211_policy,
11233                 /* can be retrieved by unprivileged users */
11234                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11235                                   NL80211_FLAG_NEED_RTNL,
11236         },
11237         {
11238                 .cmd = NL80211_CMD_SET_WIPHY,
11239                 .doit = nl80211_set_wiphy,
11240                 .policy = nl80211_policy,
11241                 .flags = GENL_UNS_ADMIN_PERM,
11242                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11243         },
11244         {
11245                 .cmd = NL80211_CMD_GET_INTERFACE,
11246                 .doit = nl80211_get_interface,
11247                 .dumpit = nl80211_dump_interface,
11248                 .policy = nl80211_policy,
11249                 /* can be retrieved by unprivileged users */
11250                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11251                                   NL80211_FLAG_NEED_RTNL,
11252         },
11253         {
11254                 .cmd = NL80211_CMD_SET_INTERFACE,
11255                 .doit = nl80211_set_interface,
11256                 .policy = nl80211_policy,
11257                 .flags = GENL_UNS_ADMIN_PERM,
11258                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11259                                   NL80211_FLAG_NEED_RTNL,
11260         },
11261         {
11262                 .cmd = NL80211_CMD_NEW_INTERFACE,
11263                 .doit = nl80211_new_interface,
11264                 .policy = nl80211_policy,
11265                 .flags = GENL_UNS_ADMIN_PERM,
11266                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11267                                   NL80211_FLAG_NEED_RTNL,
11268         },
11269         {
11270                 .cmd = NL80211_CMD_DEL_INTERFACE,
11271                 .doit = nl80211_del_interface,
11272                 .policy = nl80211_policy,
11273                 .flags = GENL_UNS_ADMIN_PERM,
11274                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11275                                   NL80211_FLAG_NEED_RTNL,
11276         },
11277         {
11278                 .cmd = NL80211_CMD_GET_KEY,
11279                 .doit = nl80211_get_key,
11280                 .policy = nl80211_policy,
11281                 .flags = GENL_UNS_ADMIN_PERM,
11282                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11283                                   NL80211_FLAG_NEED_RTNL,
11284         },
11285         {
11286                 .cmd = NL80211_CMD_SET_KEY,
11287                 .doit = nl80211_set_key,
11288                 .policy = nl80211_policy,
11289                 .flags = GENL_UNS_ADMIN_PERM,
11290                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11291                                   NL80211_FLAG_NEED_RTNL |
11292                                   NL80211_FLAG_CLEAR_SKB,
11293         },
11294         {
11295                 .cmd = NL80211_CMD_NEW_KEY,
11296                 .doit = nl80211_new_key,
11297                 .policy = nl80211_policy,
11298                 .flags = GENL_UNS_ADMIN_PERM,
11299                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11300                                   NL80211_FLAG_NEED_RTNL |
11301                                   NL80211_FLAG_CLEAR_SKB,
11302         },
11303         {
11304                 .cmd = NL80211_CMD_DEL_KEY,
11305                 .doit = nl80211_del_key,
11306                 .policy = nl80211_policy,
11307                 .flags = GENL_UNS_ADMIN_PERM,
11308                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11309                                   NL80211_FLAG_NEED_RTNL,
11310         },
11311         {
11312                 .cmd = NL80211_CMD_SET_BEACON,
11313                 .policy = nl80211_policy,
11314                 .flags = GENL_UNS_ADMIN_PERM,
11315                 .doit = nl80211_set_beacon,
11316                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11317                                   NL80211_FLAG_NEED_RTNL,
11318         },
11319         {
11320                 .cmd = NL80211_CMD_START_AP,
11321                 .policy = nl80211_policy,
11322                 .flags = GENL_UNS_ADMIN_PERM,
11323                 .doit = nl80211_start_ap,
11324                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11325                                   NL80211_FLAG_NEED_RTNL,
11326         },
11327         {
11328                 .cmd = NL80211_CMD_STOP_AP,
11329                 .policy = nl80211_policy,
11330                 .flags = GENL_UNS_ADMIN_PERM,
11331                 .doit = nl80211_stop_ap,
11332                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11333                                   NL80211_FLAG_NEED_RTNL,
11334         },
11335         {
11336                 .cmd = NL80211_CMD_GET_STATION,
11337                 .doit = nl80211_get_station,
11338                 .dumpit = nl80211_dump_station,
11339                 .policy = nl80211_policy,
11340                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11341                                   NL80211_FLAG_NEED_RTNL,
11342         },
11343         {
11344                 .cmd = NL80211_CMD_SET_STATION,
11345                 .doit = nl80211_set_station,
11346                 .policy = nl80211_policy,
11347                 .flags = GENL_UNS_ADMIN_PERM,
11348                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11349                                   NL80211_FLAG_NEED_RTNL,
11350         },
11351         {
11352                 .cmd = NL80211_CMD_NEW_STATION,
11353                 .doit = nl80211_new_station,
11354                 .policy = nl80211_policy,
11355                 .flags = GENL_UNS_ADMIN_PERM,
11356                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11357                                   NL80211_FLAG_NEED_RTNL,
11358         },
11359         {
11360                 .cmd = NL80211_CMD_DEL_STATION,
11361                 .doit = nl80211_del_station,
11362                 .policy = nl80211_policy,
11363                 .flags = GENL_UNS_ADMIN_PERM,
11364                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11365                                   NL80211_FLAG_NEED_RTNL,
11366         },
11367         {
11368                 .cmd = NL80211_CMD_GET_MPATH,
11369                 .doit = nl80211_get_mpath,
11370                 .dumpit = nl80211_dump_mpath,
11371                 .policy = nl80211_policy,
11372                 .flags = GENL_UNS_ADMIN_PERM,
11373                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11374                                   NL80211_FLAG_NEED_RTNL,
11375         },
11376         {
11377                 .cmd = NL80211_CMD_GET_MPP,
11378                 .doit = nl80211_get_mpp,
11379                 .dumpit = nl80211_dump_mpp,
11380                 .policy = nl80211_policy,
11381                 .flags = GENL_UNS_ADMIN_PERM,
11382                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11383                                   NL80211_FLAG_NEED_RTNL,
11384         },
11385         {
11386                 .cmd = NL80211_CMD_SET_MPATH,
11387                 .doit = nl80211_set_mpath,
11388                 .policy = nl80211_policy,
11389                 .flags = GENL_UNS_ADMIN_PERM,
11390                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11391                                   NL80211_FLAG_NEED_RTNL,
11392         },
11393         {
11394                 .cmd = NL80211_CMD_NEW_MPATH,
11395                 .doit = nl80211_new_mpath,
11396                 .policy = nl80211_policy,
11397                 .flags = GENL_UNS_ADMIN_PERM,
11398                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11399                                   NL80211_FLAG_NEED_RTNL,
11400         },
11401         {
11402                 .cmd = NL80211_CMD_DEL_MPATH,
11403                 .doit = nl80211_del_mpath,
11404                 .policy = nl80211_policy,
11405                 .flags = GENL_UNS_ADMIN_PERM,
11406                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11407                                   NL80211_FLAG_NEED_RTNL,
11408         },
11409         {
11410                 .cmd = NL80211_CMD_SET_BSS,
11411                 .doit = nl80211_set_bss,
11412                 .policy = nl80211_policy,
11413                 .flags = GENL_UNS_ADMIN_PERM,
11414                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11415                                   NL80211_FLAG_NEED_RTNL,
11416         },
11417         {
11418                 .cmd = NL80211_CMD_GET_REG,
11419                 .doit = nl80211_get_reg_do,
11420                 .dumpit = nl80211_get_reg_dump,
11421                 .policy = nl80211_policy,
11422                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11423                 /* can be retrieved by unprivileged users */
11424         },
11425 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11426         {
11427                 .cmd = NL80211_CMD_SET_REG,
11428                 .doit = nl80211_set_reg,
11429                 .policy = nl80211_policy,
11430                 .flags = GENL_ADMIN_PERM,
11431                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11432         },
11433 #endif
11434         {
11435                 .cmd = NL80211_CMD_REQ_SET_REG,
11436                 .doit = nl80211_req_set_reg,
11437                 .policy = nl80211_policy,
11438                 .flags = GENL_ADMIN_PERM,
11439         },
11440         {
11441                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11442                 .doit = nl80211_get_mesh_config,
11443                 .policy = nl80211_policy,
11444                 /* can be retrieved by unprivileged users */
11445                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11446                                   NL80211_FLAG_NEED_RTNL,
11447         },
11448         {
11449                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11450                 .doit = nl80211_update_mesh_config,
11451                 .policy = nl80211_policy,
11452                 .flags = GENL_UNS_ADMIN_PERM,
11453                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11454                                   NL80211_FLAG_NEED_RTNL,
11455         },
11456         {
11457                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11458                 .doit = nl80211_trigger_scan,
11459                 .policy = nl80211_policy,
11460                 .flags = GENL_UNS_ADMIN_PERM,
11461                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11462                                   NL80211_FLAG_NEED_RTNL,
11463         },
11464         {
11465                 .cmd = NL80211_CMD_ABORT_SCAN,
11466                 .doit = nl80211_abort_scan,
11467                 .policy = nl80211_policy,
11468                 .flags = GENL_UNS_ADMIN_PERM,
11469                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11470                                   NL80211_FLAG_NEED_RTNL,
11471         },
11472         {
11473                 .cmd = NL80211_CMD_GET_SCAN,
11474                 .policy = nl80211_policy,
11475                 .dumpit = nl80211_dump_scan,
11476         },
11477         {
11478                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11479                 .doit = nl80211_start_sched_scan,
11480                 .policy = nl80211_policy,
11481                 .flags = GENL_UNS_ADMIN_PERM,
11482                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11483                                   NL80211_FLAG_NEED_RTNL,
11484         },
11485         {
11486                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11487                 .doit = nl80211_stop_sched_scan,
11488                 .policy = nl80211_policy,
11489                 .flags = GENL_UNS_ADMIN_PERM,
11490                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11491                                   NL80211_FLAG_NEED_RTNL,
11492         },
11493         {
11494                 .cmd = NL80211_CMD_AUTHENTICATE,
11495                 .doit = nl80211_authenticate,
11496                 .policy = nl80211_policy,
11497                 .flags = GENL_UNS_ADMIN_PERM,
11498                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11499                                   NL80211_FLAG_NEED_RTNL |
11500                                   NL80211_FLAG_CLEAR_SKB,
11501         },
11502         {
11503                 .cmd = NL80211_CMD_ASSOCIATE,
11504                 .doit = nl80211_associate,
11505                 .policy = nl80211_policy,
11506                 .flags = GENL_UNS_ADMIN_PERM,
11507                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11508                                   NL80211_FLAG_NEED_RTNL,
11509         },
11510         {
11511                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11512                 .doit = nl80211_deauthenticate,
11513                 .policy = nl80211_policy,
11514                 .flags = GENL_UNS_ADMIN_PERM,
11515                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11516                                   NL80211_FLAG_NEED_RTNL,
11517         },
11518         {
11519                 .cmd = NL80211_CMD_DISASSOCIATE,
11520                 .doit = nl80211_disassociate,
11521                 .policy = nl80211_policy,
11522                 .flags = GENL_UNS_ADMIN_PERM,
11523                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11524                                   NL80211_FLAG_NEED_RTNL,
11525         },
11526         {
11527                 .cmd = NL80211_CMD_JOIN_IBSS,
11528                 .doit = nl80211_join_ibss,
11529                 .policy = nl80211_policy,
11530                 .flags = GENL_UNS_ADMIN_PERM,
11531                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11532                                   NL80211_FLAG_NEED_RTNL,
11533         },
11534         {
11535                 .cmd = NL80211_CMD_LEAVE_IBSS,
11536                 .doit = nl80211_leave_ibss,
11537                 .policy = nl80211_policy,
11538                 .flags = GENL_UNS_ADMIN_PERM,
11539                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11540                                   NL80211_FLAG_NEED_RTNL,
11541         },
11542 #ifdef CONFIG_NL80211_TESTMODE
11543         {
11544                 .cmd = NL80211_CMD_TESTMODE,
11545                 .doit = nl80211_testmode_do,
11546                 .dumpit = nl80211_testmode_dump,
11547                 .policy = nl80211_policy,
11548                 .flags = GENL_UNS_ADMIN_PERM,
11549                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11550                                   NL80211_FLAG_NEED_RTNL,
11551         },
11552 #endif
11553         {
11554                 .cmd = NL80211_CMD_CONNECT,
11555                 .doit = nl80211_connect,
11556                 .policy = nl80211_policy,
11557                 .flags = GENL_UNS_ADMIN_PERM,
11558                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11559                                   NL80211_FLAG_NEED_RTNL,
11560         },
11561         {
11562                 .cmd = NL80211_CMD_DISCONNECT,
11563                 .doit = nl80211_disconnect,
11564                 .policy = nl80211_policy,
11565                 .flags = GENL_UNS_ADMIN_PERM,
11566                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11567                                   NL80211_FLAG_NEED_RTNL,
11568         },
11569         {
11570                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11571                 .doit = nl80211_wiphy_netns,
11572                 .policy = nl80211_policy,
11573                 .flags = GENL_UNS_ADMIN_PERM,
11574                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11575                                   NL80211_FLAG_NEED_RTNL,
11576         },
11577         {
11578                 .cmd = NL80211_CMD_GET_SURVEY,
11579                 .policy = nl80211_policy,
11580                 .dumpit = nl80211_dump_survey,
11581         },
11582         {
11583                 .cmd = NL80211_CMD_SET_PMKSA,
11584                 .doit = nl80211_setdel_pmksa,
11585                 .policy = nl80211_policy,
11586                 .flags = GENL_UNS_ADMIN_PERM,
11587                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11588                                   NL80211_FLAG_NEED_RTNL,
11589         },
11590         {
11591                 .cmd = NL80211_CMD_DEL_PMKSA,
11592                 .doit = nl80211_setdel_pmksa,
11593                 .policy = nl80211_policy,
11594                 .flags = GENL_UNS_ADMIN_PERM,
11595                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11596                                   NL80211_FLAG_NEED_RTNL,
11597         },
11598         {
11599                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11600                 .doit = nl80211_flush_pmksa,
11601                 .policy = nl80211_policy,
11602                 .flags = GENL_UNS_ADMIN_PERM,
11603                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11604                                   NL80211_FLAG_NEED_RTNL,
11605         },
11606         {
11607                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11608                 .doit = nl80211_remain_on_channel,
11609                 .policy = nl80211_policy,
11610                 .flags = GENL_UNS_ADMIN_PERM,
11611                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11612                                   NL80211_FLAG_NEED_RTNL,
11613         },
11614         {
11615                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11616                 .doit = nl80211_cancel_remain_on_channel,
11617                 .policy = nl80211_policy,
11618                 .flags = GENL_UNS_ADMIN_PERM,
11619                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11620                                   NL80211_FLAG_NEED_RTNL,
11621         },
11622         {
11623                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11624                 .doit = nl80211_set_tx_bitrate_mask,
11625                 .policy = nl80211_policy,
11626                 .flags = GENL_UNS_ADMIN_PERM,
11627                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11628                                   NL80211_FLAG_NEED_RTNL,
11629         },
11630         {
11631                 .cmd = NL80211_CMD_REGISTER_FRAME,
11632                 .doit = nl80211_register_mgmt,
11633                 .policy = nl80211_policy,
11634                 .flags = GENL_UNS_ADMIN_PERM,
11635                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11636                                   NL80211_FLAG_NEED_RTNL,
11637         },
11638         {
11639                 .cmd = NL80211_CMD_FRAME,
11640                 .doit = nl80211_tx_mgmt,
11641                 .policy = nl80211_policy,
11642                 .flags = GENL_UNS_ADMIN_PERM,
11643                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11644                                   NL80211_FLAG_NEED_RTNL,
11645         },
11646         {
11647                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11648                 .doit = nl80211_tx_mgmt_cancel_wait,
11649                 .policy = nl80211_policy,
11650                 .flags = GENL_UNS_ADMIN_PERM,
11651                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11652                                   NL80211_FLAG_NEED_RTNL,
11653         },
11654         {
11655                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11656                 .doit = nl80211_set_power_save,
11657                 .policy = nl80211_policy,
11658                 .flags = GENL_UNS_ADMIN_PERM,
11659                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11660                                   NL80211_FLAG_NEED_RTNL,
11661         },
11662         {
11663                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11664                 .doit = nl80211_get_power_save,
11665                 .policy = nl80211_policy,
11666                 /* can be retrieved by unprivileged users */
11667                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11668                                   NL80211_FLAG_NEED_RTNL,
11669         },
11670         {
11671                 .cmd = NL80211_CMD_SET_CQM,
11672                 .doit = nl80211_set_cqm,
11673                 .policy = nl80211_policy,
11674                 .flags = GENL_UNS_ADMIN_PERM,
11675                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11676                                   NL80211_FLAG_NEED_RTNL,
11677         },
11678         {
11679                 .cmd = NL80211_CMD_SET_CHANNEL,
11680                 .doit = nl80211_set_channel,
11681                 .policy = nl80211_policy,
11682                 .flags = GENL_UNS_ADMIN_PERM,
11683                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11684                                   NL80211_FLAG_NEED_RTNL,
11685         },
11686         {
11687                 .cmd = NL80211_CMD_SET_WDS_PEER,
11688                 .doit = nl80211_set_wds_peer,
11689                 .policy = nl80211_policy,
11690                 .flags = GENL_UNS_ADMIN_PERM,
11691                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11692                                   NL80211_FLAG_NEED_RTNL,
11693         },
11694         {
11695                 .cmd = NL80211_CMD_JOIN_MESH,
11696                 .doit = nl80211_join_mesh,
11697                 .policy = nl80211_policy,
11698                 .flags = GENL_UNS_ADMIN_PERM,
11699                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11700                                   NL80211_FLAG_NEED_RTNL,
11701         },
11702         {
11703                 .cmd = NL80211_CMD_LEAVE_MESH,
11704                 .doit = nl80211_leave_mesh,
11705                 .policy = nl80211_policy,
11706                 .flags = GENL_UNS_ADMIN_PERM,
11707                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11708                                   NL80211_FLAG_NEED_RTNL,
11709         },
11710         {
11711                 .cmd = NL80211_CMD_JOIN_OCB,
11712                 .doit = nl80211_join_ocb,
11713                 .policy = nl80211_policy,
11714                 .flags = GENL_UNS_ADMIN_PERM,
11715                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11716                                   NL80211_FLAG_NEED_RTNL,
11717         },
11718         {
11719                 .cmd = NL80211_CMD_LEAVE_OCB,
11720                 .doit = nl80211_leave_ocb,
11721                 .policy = nl80211_policy,
11722                 .flags = GENL_UNS_ADMIN_PERM,
11723                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11724                                   NL80211_FLAG_NEED_RTNL,
11725         },
11726 #ifdef CONFIG_PM
11727         {
11728                 .cmd = NL80211_CMD_GET_WOWLAN,
11729                 .doit = nl80211_get_wowlan,
11730                 .policy = nl80211_policy,
11731                 /* can be retrieved by unprivileged users */
11732                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11733                                   NL80211_FLAG_NEED_RTNL,
11734         },
11735         {
11736                 .cmd = NL80211_CMD_SET_WOWLAN,
11737                 .doit = nl80211_set_wowlan,
11738                 .policy = nl80211_policy,
11739                 .flags = GENL_UNS_ADMIN_PERM,
11740                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11741                                   NL80211_FLAG_NEED_RTNL,
11742         },
11743 #endif
11744         {
11745                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11746                 .doit = nl80211_set_rekey_data,
11747                 .policy = nl80211_policy,
11748                 .flags = GENL_UNS_ADMIN_PERM,
11749                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11750                                   NL80211_FLAG_NEED_RTNL |
11751                                   NL80211_FLAG_CLEAR_SKB,
11752         },
11753         {
11754                 .cmd = NL80211_CMD_TDLS_MGMT,
11755                 .doit = nl80211_tdls_mgmt,
11756                 .policy = nl80211_policy,
11757                 .flags = GENL_UNS_ADMIN_PERM,
11758                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11759                                   NL80211_FLAG_NEED_RTNL,
11760         },
11761         {
11762                 .cmd = NL80211_CMD_TDLS_OPER,
11763                 .doit = nl80211_tdls_oper,
11764                 .policy = nl80211_policy,
11765                 .flags = GENL_UNS_ADMIN_PERM,
11766                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11767                                   NL80211_FLAG_NEED_RTNL,
11768         },
11769         {
11770                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11771                 .doit = nl80211_register_unexpected_frame,
11772                 .policy = nl80211_policy,
11773                 .flags = GENL_UNS_ADMIN_PERM,
11774                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11775                                   NL80211_FLAG_NEED_RTNL,
11776         },
11777         {
11778                 .cmd = NL80211_CMD_PROBE_CLIENT,
11779                 .doit = nl80211_probe_client,
11780                 .policy = nl80211_policy,
11781                 .flags = GENL_UNS_ADMIN_PERM,
11782                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11783                                   NL80211_FLAG_NEED_RTNL,
11784         },
11785         {
11786                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11787                 .doit = nl80211_register_beacons,
11788                 .policy = nl80211_policy,
11789                 .flags = GENL_UNS_ADMIN_PERM,
11790                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11791                                   NL80211_FLAG_NEED_RTNL,
11792         },
11793         {
11794                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11795                 .doit = nl80211_set_noack_map,
11796                 .policy = nl80211_policy,
11797                 .flags = GENL_UNS_ADMIN_PERM,
11798                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11799                                   NL80211_FLAG_NEED_RTNL,
11800         },
11801         {
11802                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11803                 .doit = nl80211_start_p2p_device,
11804                 .policy = nl80211_policy,
11805                 .flags = GENL_UNS_ADMIN_PERM,
11806                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11807                                   NL80211_FLAG_NEED_RTNL,
11808         },
11809         {
11810                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11811                 .doit = nl80211_stop_p2p_device,
11812                 .policy = nl80211_policy,
11813                 .flags = GENL_UNS_ADMIN_PERM,
11814                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11815                                   NL80211_FLAG_NEED_RTNL,
11816         },
11817         {
11818                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11819                 .doit = nl80211_set_mcast_rate,
11820                 .policy = nl80211_policy,
11821                 .flags = GENL_UNS_ADMIN_PERM,
11822                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11823                                   NL80211_FLAG_NEED_RTNL,
11824         },
11825         {
11826                 .cmd = NL80211_CMD_SET_MAC_ACL,
11827                 .doit = nl80211_set_mac_acl,
11828                 .policy = nl80211_policy,
11829                 .flags = GENL_UNS_ADMIN_PERM,
11830                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11831                                   NL80211_FLAG_NEED_RTNL,
11832         },
11833         {
11834                 .cmd = NL80211_CMD_RADAR_DETECT,
11835                 .doit = nl80211_start_radar_detection,
11836                 .policy = nl80211_policy,
11837                 .flags = GENL_UNS_ADMIN_PERM,
11838                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11839                                   NL80211_FLAG_NEED_RTNL,
11840         },
11841         {
11842                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11843                 .doit = nl80211_get_protocol_features,
11844                 .policy = nl80211_policy,
11845         },
11846         {
11847                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11848                 .doit = nl80211_update_ft_ies,
11849                 .policy = nl80211_policy,
11850                 .flags = GENL_UNS_ADMIN_PERM,
11851                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11852                                   NL80211_FLAG_NEED_RTNL,
11853         },
11854         {
11855                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11856                 .doit = nl80211_crit_protocol_start,
11857                 .policy = nl80211_policy,
11858                 .flags = GENL_UNS_ADMIN_PERM,
11859                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11860                                   NL80211_FLAG_NEED_RTNL,
11861         },
11862         {
11863                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11864                 .doit = nl80211_crit_protocol_stop,
11865                 .policy = nl80211_policy,
11866                 .flags = GENL_UNS_ADMIN_PERM,
11867                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11868                                   NL80211_FLAG_NEED_RTNL,
11869         },
11870         {
11871                 .cmd = NL80211_CMD_GET_COALESCE,
11872                 .doit = nl80211_get_coalesce,
11873                 .policy = nl80211_policy,
11874                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11875                                   NL80211_FLAG_NEED_RTNL,
11876         },
11877         {
11878                 .cmd = NL80211_CMD_SET_COALESCE,
11879                 .doit = nl80211_set_coalesce,
11880                 .policy = nl80211_policy,
11881                 .flags = GENL_UNS_ADMIN_PERM,
11882                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11883                                   NL80211_FLAG_NEED_RTNL,
11884         },
11885         {
11886                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11887                 .doit = nl80211_channel_switch,
11888                 .policy = nl80211_policy,
11889                 .flags = GENL_UNS_ADMIN_PERM,
11890                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11891                                   NL80211_FLAG_NEED_RTNL,
11892         },
11893         {
11894                 .cmd = NL80211_CMD_VENDOR,
11895                 .doit = nl80211_vendor_cmd,
11896                 .dumpit = nl80211_vendor_cmd_dump,
11897                 .policy = nl80211_policy,
11898                 .flags = GENL_UNS_ADMIN_PERM,
11899                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11900                                   NL80211_FLAG_NEED_RTNL,
11901         },
11902         {
11903                 .cmd = NL80211_CMD_SET_QOS_MAP,
11904                 .doit = nl80211_set_qos_map,
11905                 .policy = nl80211_policy,
11906                 .flags = GENL_UNS_ADMIN_PERM,
11907                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11908                                   NL80211_FLAG_NEED_RTNL,
11909         },
11910         {
11911                 .cmd = NL80211_CMD_ADD_TX_TS,
11912                 .doit = nl80211_add_tx_ts,
11913                 .policy = nl80211_policy,
11914                 .flags = GENL_UNS_ADMIN_PERM,
11915                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11916                                   NL80211_FLAG_NEED_RTNL,
11917         },
11918         {
11919                 .cmd = NL80211_CMD_DEL_TX_TS,
11920                 .doit = nl80211_del_tx_ts,
11921                 .policy = nl80211_policy,
11922                 .flags = GENL_UNS_ADMIN_PERM,
11923                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11924                                   NL80211_FLAG_NEED_RTNL,
11925         },
11926         {
11927                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11928                 .doit = nl80211_tdls_channel_switch,
11929                 .policy = nl80211_policy,
11930                 .flags = GENL_UNS_ADMIN_PERM,
11931                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11932                                   NL80211_FLAG_NEED_RTNL,
11933         },
11934         {
11935                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11936                 .doit = nl80211_tdls_cancel_channel_switch,
11937                 .policy = nl80211_policy,
11938                 .flags = GENL_UNS_ADMIN_PERM,
11939                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11940                                   NL80211_FLAG_NEED_RTNL,
11941         },
11942 };
11943
11944 /* notification functions */
11945
11946 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11947                           enum nl80211_commands cmd)
11948 {
11949         struct sk_buff *msg;
11950         struct nl80211_dump_wiphy_state state = {};
11951
11952         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11953                 cmd != NL80211_CMD_DEL_WIPHY);
11954
11955         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11956         if (!msg)
11957                 return;
11958
11959         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11960                 nlmsg_free(msg);
11961                 return;
11962         }
11963
11964         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11965                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11966 }
11967
11968 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
11969                                 struct wireless_dev *wdev,
11970                                 enum nl80211_commands cmd)
11971 {
11972         struct sk_buff *msg;
11973
11974         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
11975                 cmd != NL80211_CMD_DEL_INTERFACE);
11976
11977         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11978         if (!msg)
11979                 return;
11980
11981         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
11982                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
11983                 nlmsg_free(msg);
11984                 return;
11985         }
11986
11987         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11988                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11989 }
11990
11991 static int nl80211_add_scan_req(struct sk_buff *msg,
11992                                 struct cfg80211_registered_device *rdev)
11993 {
11994         struct cfg80211_scan_request *req = rdev->scan_req;
11995         struct nlattr *nest;
11996         int i;
11997
11998         if (WARN_ON(!req))
11999                 return 0;
12000
12001         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
12002         if (!nest)
12003                 goto nla_put_failure;
12004         for (i = 0; i < req->n_ssids; i++) {
12005                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
12006                         goto nla_put_failure;
12007         }
12008         nla_nest_end(msg, nest);
12009
12010         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
12011         if (!nest)
12012                 goto nla_put_failure;
12013         for (i = 0; i < req->n_channels; i++) {
12014                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
12015                         goto nla_put_failure;
12016         }
12017         nla_nest_end(msg, nest);
12018
12019         if (req->ie &&
12020             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
12021                 goto nla_put_failure;
12022
12023         if (req->flags &&
12024             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
12025                 goto nla_put_failure;
12026
12027         if (req->info.scan_start_tsf &&
12028             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
12029                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
12030              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
12031                      req->info.tsf_bssid)))
12032                 goto nla_put_failure;
12033
12034         return 0;
12035  nla_put_failure:
12036         return -ENOBUFS;
12037 }
12038
12039 static int nl80211_send_scan_msg(struct sk_buff *msg,
12040                                  struct cfg80211_registered_device *rdev,
12041                                  struct wireless_dev *wdev,
12042                                  u32 portid, u32 seq, int flags,
12043                                  u32 cmd)
12044 {
12045         void *hdr;
12046
12047         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
12048         if (!hdr)
12049                 return -1;
12050
12051         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12052             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12053                                          wdev->netdev->ifindex)) ||
12054             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12055                               NL80211_ATTR_PAD))
12056                 goto nla_put_failure;
12057
12058         /* ignore errors and send incomplete event anyway */
12059         nl80211_add_scan_req(msg, rdev);
12060
12061         genlmsg_end(msg, hdr);
12062         return 0;
12063
12064  nla_put_failure:
12065         genlmsg_cancel(msg, hdr);
12066         return -EMSGSIZE;
12067 }
12068
12069 static int
12070 nl80211_send_sched_scan_msg(struct sk_buff *msg,
12071                             struct cfg80211_registered_device *rdev,
12072                             struct net_device *netdev,
12073                             u32 portid, u32 seq, int flags, u32 cmd)
12074 {
12075         void *hdr;
12076
12077         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
12078         if (!hdr)
12079                 return -1;
12080
12081         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12082             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12083                 goto nla_put_failure;
12084
12085         genlmsg_end(msg, hdr);
12086         return 0;
12087
12088  nla_put_failure:
12089         genlmsg_cancel(msg, hdr);
12090         return -EMSGSIZE;
12091 }
12092
12093 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
12094                              struct wireless_dev *wdev)
12095 {
12096         struct sk_buff *msg;
12097
12098         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12099         if (!msg)
12100                 return;
12101
12102         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
12103                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
12104                 nlmsg_free(msg);
12105                 return;
12106         }
12107
12108         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12109                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12110 }
12111
12112 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
12113                                        struct wireless_dev *wdev, bool aborted)
12114 {
12115         struct sk_buff *msg;
12116
12117         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12118         if (!msg)
12119                 return NULL;
12120
12121         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
12122                                   aborted ? NL80211_CMD_SCAN_ABORTED :
12123                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
12124                 nlmsg_free(msg);
12125                 return NULL;
12126         }
12127
12128         return msg;
12129 }
12130
12131 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
12132                               struct sk_buff *msg)
12133 {
12134         if (!msg)
12135                 return;
12136
12137         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12138                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12139 }
12140
12141 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
12142                                      struct net_device *netdev)
12143 {
12144         struct sk_buff *msg;
12145
12146         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12147         if (!msg)
12148                 return;
12149
12150         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
12151                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
12152                 nlmsg_free(msg);
12153                 return;
12154         }
12155
12156         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12157                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12158 }
12159
12160 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
12161                              struct net_device *netdev, u32 cmd)
12162 {
12163         struct sk_buff *msg;
12164
12165         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12166         if (!msg)
12167                 return;
12168
12169         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
12170                 nlmsg_free(msg);
12171                 return;
12172         }
12173
12174         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12175                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12176 }
12177
12178 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
12179                                           struct regulatory_request *request)
12180 {
12181         /* Userspace can always count this one always being set */
12182         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
12183                 goto nla_put_failure;
12184
12185         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
12186                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12187                                NL80211_REGDOM_TYPE_WORLD))
12188                         goto nla_put_failure;
12189         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
12190                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12191                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
12192                         goto nla_put_failure;
12193         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
12194                    request->intersect) {
12195                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12196                                NL80211_REGDOM_TYPE_INTERSECTION))
12197                         goto nla_put_failure;
12198         } else {
12199                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12200                                NL80211_REGDOM_TYPE_COUNTRY) ||
12201                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
12202                                    request->alpha2))
12203                         goto nla_put_failure;
12204         }
12205
12206         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
12207                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
12208
12209                 if (wiphy &&
12210                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
12211                         goto nla_put_failure;
12212
12213                 if (wiphy &&
12214                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
12215                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
12216                         goto nla_put_failure;
12217         }
12218
12219         return true;
12220
12221 nla_put_failure:
12222         return false;
12223 }
12224
12225 /*
12226  * This can happen on global regulatory changes or device specific settings
12227  * based on custom regulatory domains.
12228  */
12229 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
12230                                      struct regulatory_request *request)
12231 {
12232         struct sk_buff *msg;
12233         void *hdr;
12234
12235         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12236         if (!msg)
12237                 return;
12238
12239         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
12240         if (!hdr) {
12241                 nlmsg_free(msg);
12242                 return;
12243         }
12244
12245         if (nl80211_reg_change_event_fill(msg, request) == false)
12246                 goto nla_put_failure;
12247
12248         genlmsg_end(msg, hdr);
12249
12250         rcu_read_lock();
12251         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12252                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12253         rcu_read_unlock();
12254
12255         return;
12256
12257 nla_put_failure:
12258         genlmsg_cancel(msg, hdr);
12259         nlmsg_free(msg);
12260 }
12261
12262 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
12263                                     struct net_device *netdev,
12264                                     const u8 *buf, size_t len,
12265                                     enum nl80211_commands cmd, gfp_t gfp,
12266                                     int uapsd_queues)
12267 {
12268         struct sk_buff *msg;
12269         void *hdr;
12270
12271         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12272         if (!msg)
12273                 return;
12274
12275         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12276         if (!hdr) {
12277                 nlmsg_free(msg);
12278                 return;
12279         }
12280
12281         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12282             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12283             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
12284                 goto nla_put_failure;
12285
12286         if (uapsd_queues >= 0) {
12287                 struct nlattr *nla_wmm =
12288                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
12289                 if (!nla_wmm)
12290                         goto nla_put_failure;
12291
12292                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
12293                                uapsd_queues))
12294                         goto nla_put_failure;
12295
12296                 nla_nest_end(msg, nla_wmm);
12297         }
12298
12299         genlmsg_end(msg, hdr);
12300
12301         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12302                                 NL80211_MCGRP_MLME, gfp);
12303         return;
12304
12305  nla_put_failure:
12306         genlmsg_cancel(msg, hdr);
12307         nlmsg_free(msg);
12308 }
12309
12310 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
12311                           struct net_device *netdev, const u8 *buf,
12312                           size_t len, gfp_t gfp)
12313 {
12314         nl80211_send_mlme_event(rdev, netdev, buf, len,
12315                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
12316 }
12317
12318 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
12319                            struct net_device *netdev, const u8 *buf,
12320                            size_t len, gfp_t gfp, int uapsd_queues)
12321 {
12322         nl80211_send_mlme_event(rdev, netdev, buf, len,
12323                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12324 }
12325
12326 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12327                          struct net_device *netdev, const u8 *buf,
12328                          size_t len, gfp_t gfp)
12329 {
12330         nl80211_send_mlme_event(rdev, netdev, buf, len,
12331                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12332 }
12333
12334 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12335                            struct net_device *netdev, const u8 *buf,
12336                            size_t len, gfp_t gfp)
12337 {
12338         nl80211_send_mlme_event(rdev, netdev, buf, len,
12339                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12340 }
12341
12342 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12343                                   size_t len)
12344 {
12345         struct wireless_dev *wdev = dev->ieee80211_ptr;
12346         struct wiphy *wiphy = wdev->wiphy;
12347         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12348         const struct ieee80211_mgmt *mgmt = (void *)buf;
12349         u32 cmd;
12350
12351         if (WARN_ON(len < 2))
12352                 return;
12353
12354         if (ieee80211_is_deauth(mgmt->frame_control))
12355                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12356         else
12357                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12358
12359         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12360         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12361 }
12362 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12363
12364 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12365                                       struct net_device *netdev, int cmd,
12366                                       const u8 *addr, gfp_t gfp)
12367 {
12368         struct sk_buff *msg;
12369         void *hdr;
12370
12371         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12372         if (!msg)
12373                 return;
12374
12375         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12376         if (!hdr) {
12377                 nlmsg_free(msg);
12378                 return;
12379         }
12380
12381         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12382             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12383             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12384             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12385                 goto nla_put_failure;
12386
12387         genlmsg_end(msg, hdr);
12388
12389         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12390                                 NL80211_MCGRP_MLME, gfp);
12391         return;
12392
12393  nla_put_failure:
12394         genlmsg_cancel(msg, hdr);
12395         nlmsg_free(msg);
12396 }
12397
12398 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12399                                struct net_device *netdev, const u8 *addr,
12400                                gfp_t gfp)
12401 {
12402         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12403                                   addr, gfp);
12404 }
12405
12406 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12407                                 struct net_device *netdev, const u8 *addr,
12408                                 gfp_t gfp)
12409 {
12410         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12411                                   addr, gfp);
12412 }
12413
12414 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12415                                  struct net_device *netdev, const u8 *bssid,
12416                                  const u8 *req_ie, size_t req_ie_len,
12417                                  const u8 *resp_ie, size_t resp_ie_len,
12418                                  int status, gfp_t gfp)
12419 {
12420         struct sk_buff *msg;
12421         void *hdr;
12422
12423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12424         if (!msg)
12425                 return;
12426
12427         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12428         if (!hdr) {
12429                 nlmsg_free(msg);
12430                 return;
12431         }
12432
12433         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12434             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12435             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12436             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
12437                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
12438                         status) ||
12439             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
12440             (req_ie &&
12441              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12442             (resp_ie &&
12443              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12444                 goto nla_put_failure;
12445
12446         genlmsg_end(msg, hdr);
12447
12448         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12449                                 NL80211_MCGRP_MLME, gfp);
12450         return;
12451
12452  nla_put_failure:
12453         genlmsg_cancel(msg, hdr);
12454         nlmsg_free(msg);
12455 }
12456
12457 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12458                          struct net_device *netdev, const u8 *bssid,
12459                          const u8 *req_ie, size_t req_ie_len,
12460                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12461 {
12462         struct sk_buff *msg;
12463         void *hdr;
12464
12465         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12466         if (!msg)
12467                 return;
12468
12469         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12470         if (!hdr) {
12471                 nlmsg_free(msg);
12472                 return;
12473         }
12474
12475         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12476             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12477             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12478             (req_ie &&
12479              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12480             (resp_ie &&
12481              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12482                 goto nla_put_failure;
12483
12484         genlmsg_end(msg, hdr);
12485
12486         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12487                                 NL80211_MCGRP_MLME, gfp);
12488         return;
12489
12490  nla_put_failure:
12491         genlmsg_cancel(msg, hdr);
12492         nlmsg_free(msg);
12493 }
12494
12495 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12496                                struct net_device *netdev, u16 reason,
12497                                const u8 *ie, size_t ie_len, bool from_ap)
12498 {
12499         struct sk_buff *msg;
12500         void *hdr;
12501
12502         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12503         if (!msg)
12504                 return;
12505
12506         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12507         if (!hdr) {
12508                 nlmsg_free(msg);
12509                 return;
12510         }
12511
12512         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12513             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12514             (from_ap && reason &&
12515              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12516             (from_ap &&
12517              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12518             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12519                 goto nla_put_failure;
12520
12521         genlmsg_end(msg, hdr);
12522
12523         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12524                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12525         return;
12526
12527  nla_put_failure:
12528         genlmsg_cancel(msg, hdr);
12529         nlmsg_free(msg);
12530 }
12531
12532 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12533                              struct net_device *netdev, const u8 *bssid,
12534                              gfp_t gfp)
12535 {
12536         struct sk_buff *msg;
12537         void *hdr;
12538
12539         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12540         if (!msg)
12541                 return;
12542
12543         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12544         if (!hdr) {
12545                 nlmsg_free(msg);
12546                 return;
12547         }
12548
12549         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12550             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12551             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12552                 goto nla_put_failure;
12553
12554         genlmsg_end(msg, hdr);
12555
12556         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12557                                 NL80211_MCGRP_MLME, gfp);
12558         return;
12559
12560  nla_put_failure:
12561         genlmsg_cancel(msg, hdr);
12562         nlmsg_free(msg);
12563 }
12564
12565 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12566                                         const u8* ie, u8 ie_len, gfp_t gfp)
12567 {
12568         struct wireless_dev *wdev = dev->ieee80211_ptr;
12569         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12570         struct sk_buff *msg;
12571         void *hdr;
12572
12573         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12574                 return;
12575
12576         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12577
12578         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12579         if (!msg)
12580                 return;
12581
12582         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12583         if (!hdr) {
12584                 nlmsg_free(msg);
12585                 return;
12586         }
12587
12588         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12589             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12590             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12591             (ie_len && ie &&
12592              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12593                 goto nla_put_failure;
12594
12595         genlmsg_end(msg, hdr);
12596
12597         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12598                                 NL80211_MCGRP_MLME, gfp);
12599         return;
12600
12601  nla_put_failure:
12602         genlmsg_cancel(msg, hdr);
12603         nlmsg_free(msg);
12604 }
12605 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12606
12607 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12608                                  struct net_device *netdev, const u8 *addr,
12609                                  enum nl80211_key_type key_type, int key_id,
12610                                  const u8 *tsc, gfp_t gfp)
12611 {
12612         struct sk_buff *msg;
12613         void *hdr;
12614
12615         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12616         if (!msg)
12617                 return;
12618
12619         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12620         if (!hdr) {
12621                 nlmsg_free(msg);
12622                 return;
12623         }
12624
12625         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12626             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12627             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12628             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12629             (key_id != -1 &&
12630              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12631             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12632                 goto nla_put_failure;
12633
12634         genlmsg_end(msg, hdr);
12635
12636         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12637                                 NL80211_MCGRP_MLME, gfp);
12638         return;
12639
12640  nla_put_failure:
12641         genlmsg_cancel(msg, hdr);
12642         nlmsg_free(msg);
12643 }
12644
12645 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12646                                     struct ieee80211_channel *channel_before,
12647                                     struct ieee80211_channel *channel_after)
12648 {
12649         struct sk_buff *msg;
12650         void *hdr;
12651         struct nlattr *nl_freq;
12652
12653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12654         if (!msg)
12655                 return;
12656
12657         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12658         if (!hdr) {
12659                 nlmsg_free(msg);
12660                 return;
12661         }
12662
12663         /*
12664          * Since we are applying the beacon hint to a wiphy we know its
12665          * wiphy_idx is valid
12666          */
12667         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12668                 goto nla_put_failure;
12669
12670         /* Before */
12671         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12672         if (!nl_freq)
12673                 goto nla_put_failure;
12674         if (nl80211_msg_put_channel(msg, channel_before, false))
12675                 goto nla_put_failure;
12676         nla_nest_end(msg, nl_freq);
12677
12678         /* After */
12679         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12680         if (!nl_freq)
12681                 goto nla_put_failure;
12682         if (nl80211_msg_put_channel(msg, channel_after, false))
12683                 goto nla_put_failure;
12684         nla_nest_end(msg, nl_freq);
12685
12686         genlmsg_end(msg, hdr);
12687
12688         rcu_read_lock();
12689         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12690                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12691         rcu_read_unlock();
12692
12693         return;
12694
12695 nla_put_failure:
12696         genlmsg_cancel(msg, hdr);
12697         nlmsg_free(msg);
12698 }
12699
12700 static void nl80211_send_remain_on_chan_event(
12701         int cmd, struct cfg80211_registered_device *rdev,
12702         struct wireless_dev *wdev, u64 cookie,
12703         struct ieee80211_channel *chan,
12704         unsigned int duration, gfp_t gfp)
12705 {
12706         struct sk_buff *msg;
12707         void *hdr;
12708
12709         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12710         if (!msg)
12711                 return;
12712
12713         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12714         if (!hdr) {
12715                 nlmsg_free(msg);
12716                 return;
12717         }
12718
12719         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12720             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12721                                          wdev->netdev->ifindex)) ||
12722             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12723                               NL80211_ATTR_PAD) ||
12724             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12725             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12726                         NL80211_CHAN_NO_HT) ||
12727             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12728                               NL80211_ATTR_PAD))
12729                 goto nla_put_failure;
12730
12731         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12732             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12733                 goto nla_put_failure;
12734
12735         genlmsg_end(msg, hdr);
12736
12737         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12738                                 NL80211_MCGRP_MLME, gfp);
12739         return;
12740
12741  nla_put_failure:
12742         genlmsg_cancel(msg, hdr);
12743         nlmsg_free(msg);
12744 }
12745
12746 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12747                                struct ieee80211_channel *chan,
12748                                unsigned int duration, gfp_t gfp)
12749 {
12750         struct wiphy *wiphy = wdev->wiphy;
12751         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12752
12753         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12754         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12755                                           rdev, wdev, cookie, chan,
12756                                           duration, gfp);
12757 }
12758 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12759
12760 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12761                                         struct ieee80211_channel *chan,
12762                                         gfp_t gfp)
12763 {
12764         struct wiphy *wiphy = wdev->wiphy;
12765         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12766
12767         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12768         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12769                                           rdev, wdev, cookie, chan, 0, gfp);
12770 }
12771 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12772
12773 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12774                       struct station_info *sinfo, gfp_t gfp)
12775 {
12776         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12777         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12778         struct sk_buff *msg;
12779
12780         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12781
12782         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12783         if (!msg)
12784                 return;
12785
12786         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12787                                  rdev, dev, mac_addr, sinfo) < 0) {
12788                 nlmsg_free(msg);
12789                 return;
12790         }
12791
12792         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12793                                 NL80211_MCGRP_MLME, gfp);
12794 }
12795 EXPORT_SYMBOL(cfg80211_new_sta);
12796
12797 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12798                             struct station_info *sinfo, gfp_t gfp)
12799 {
12800         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12801         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12802         struct sk_buff *msg;
12803         struct station_info empty_sinfo = {};
12804
12805         if (!sinfo)
12806                 sinfo = &empty_sinfo;
12807
12808         trace_cfg80211_del_sta(dev, mac_addr);
12809
12810         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12811         if (!msg)
12812                 return;
12813
12814         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12815                                  rdev, dev, mac_addr, sinfo) < 0) {
12816                 nlmsg_free(msg);
12817                 return;
12818         }
12819
12820         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12821                                 NL80211_MCGRP_MLME, gfp);
12822 }
12823 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12824
12825 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12826                           enum nl80211_connect_failed_reason reason,
12827                           gfp_t gfp)
12828 {
12829         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12830         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12831         struct sk_buff *msg;
12832         void *hdr;
12833
12834         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12835         if (!msg)
12836                 return;
12837
12838         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12839         if (!hdr) {
12840                 nlmsg_free(msg);
12841                 return;
12842         }
12843
12844         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12845             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12846             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12847                 goto nla_put_failure;
12848
12849         genlmsg_end(msg, hdr);
12850
12851         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12852                                 NL80211_MCGRP_MLME, gfp);
12853         return;
12854
12855  nla_put_failure:
12856         genlmsg_cancel(msg, hdr);
12857         nlmsg_free(msg);
12858 }
12859 EXPORT_SYMBOL(cfg80211_conn_failed);
12860
12861 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12862                                        const u8 *addr, gfp_t gfp)
12863 {
12864         struct wireless_dev *wdev = dev->ieee80211_ptr;
12865         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12866         struct sk_buff *msg;
12867         void *hdr;
12868         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12869
12870         if (!nlportid)
12871                 return false;
12872
12873         msg = nlmsg_new(100, gfp);
12874         if (!msg)
12875                 return true;
12876
12877         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12878         if (!hdr) {
12879                 nlmsg_free(msg);
12880                 return true;
12881         }
12882
12883         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12884             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12885             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12886                 goto nla_put_failure;
12887
12888         genlmsg_end(msg, hdr);
12889         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12890         return true;
12891
12892  nla_put_failure:
12893         genlmsg_cancel(msg, hdr);
12894         nlmsg_free(msg);
12895         return true;
12896 }
12897
12898 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12899                                 const u8 *addr, gfp_t gfp)
12900 {
12901         struct wireless_dev *wdev = dev->ieee80211_ptr;
12902         bool ret;
12903
12904         trace_cfg80211_rx_spurious_frame(dev, addr);
12905
12906         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12907                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12908                 trace_cfg80211_return_bool(false);
12909                 return false;
12910         }
12911         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12912                                          addr, gfp);
12913         trace_cfg80211_return_bool(ret);
12914         return ret;
12915 }
12916 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12917
12918 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12919                                         const u8 *addr, gfp_t gfp)
12920 {
12921         struct wireless_dev *wdev = dev->ieee80211_ptr;
12922         bool ret;
12923
12924         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12925
12926         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12927                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12928                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12929                 trace_cfg80211_return_bool(false);
12930                 return false;
12931         }
12932         ret = __nl80211_unexpected_frame(dev,
12933                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12934                                          addr, gfp);
12935         trace_cfg80211_return_bool(ret);
12936         return ret;
12937 }
12938 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12939
12940 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12941                       struct wireless_dev *wdev, u32 nlportid,
12942                       int freq, int sig_dbm,
12943                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12944 {
12945         struct net_device *netdev = wdev->netdev;
12946         struct sk_buff *msg;
12947         void *hdr;
12948
12949         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12950         if (!msg)
12951                 return -ENOMEM;
12952
12953         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12954         if (!hdr) {
12955                 nlmsg_free(msg);
12956                 return -ENOMEM;
12957         }
12958
12959         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12960             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12961                                         netdev->ifindex)) ||
12962             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12963                               NL80211_ATTR_PAD) ||
12964             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12965             (sig_dbm &&
12966              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12967             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12968             (flags &&
12969              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12970                 goto nla_put_failure;
12971
12972         genlmsg_end(msg, hdr);
12973
12974         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12975
12976  nla_put_failure:
12977         genlmsg_cancel(msg, hdr);
12978         nlmsg_free(msg);
12979         return -ENOBUFS;
12980 }
12981
12982 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12983                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12984 {
12985         struct wiphy *wiphy = wdev->wiphy;
12986         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12987         struct net_device *netdev = wdev->netdev;
12988         struct sk_buff *msg;
12989         void *hdr;
12990
12991         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12992
12993         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12994         if (!msg)
12995                 return;
12996
12997         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12998         if (!hdr) {
12999                 nlmsg_free(msg);
13000                 return;
13001         }
13002
13003         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13004             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13005                                    netdev->ifindex)) ||
13006             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13007                               NL80211_ATTR_PAD) ||
13008             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
13009             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13010                               NL80211_ATTR_PAD) ||
13011             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
13012                 goto nla_put_failure;
13013
13014         genlmsg_end(msg, hdr);
13015
13016         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13017                                 NL80211_MCGRP_MLME, gfp);
13018         return;
13019
13020  nla_put_failure:
13021         genlmsg_cancel(msg, hdr);
13022         nlmsg_free(msg);
13023 }
13024 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
13025
13026 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
13027                                             const char *mac, gfp_t gfp)
13028 {
13029         struct wireless_dev *wdev = dev->ieee80211_ptr;
13030         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13031         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13032         void **cb;
13033
13034         if (!msg)
13035                 return NULL;
13036
13037         cb = (void **)msg->cb;
13038
13039         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
13040         if (!cb[0]) {
13041                 nlmsg_free(msg);
13042                 return NULL;
13043         }
13044
13045         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13046             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
13047                 goto nla_put_failure;
13048
13049         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
13050                 goto nla_put_failure;
13051
13052         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
13053         if (!cb[1])
13054                 goto nla_put_failure;
13055
13056         cb[2] = rdev;
13057
13058         return msg;
13059  nla_put_failure:
13060         nlmsg_free(msg);
13061         return NULL;
13062 }
13063
13064 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
13065 {
13066         void **cb = (void **)msg->cb;
13067         struct cfg80211_registered_device *rdev = cb[2];
13068
13069         nla_nest_end(msg, cb[1]);
13070         genlmsg_end(msg, cb[0]);
13071
13072         memset(msg->cb, 0, sizeof(msg->cb));
13073
13074         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13075                                 NL80211_MCGRP_MLME, gfp);
13076 }
13077
13078 void cfg80211_cqm_rssi_notify(struct net_device *dev,
13079                               enum nl80211_cqm_rssi_threshold_event rssi_event,
13080                               gfp_t gfp)
13081 {
13082         struct sk_buff *msg;
13083
13084         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
13085
13086         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
13087                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
13088                 return;
13089
13090         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13091         if (!msg)
13092                 return;
13093
13094         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
13095                         rssi_event))
13096                 goto nla_put_failure;
13097
13098         cfg80211_send_cqm(msg, gfp);
13099
13100         return;
13101
13102  nla_put_failure:
13103         nlmsg_free(msg);
13104 }
13105 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
13106
13107 void cfg80211_cqm_txe_notify(struct net_device *dev,
13108                              const u8 *peer, u32 num_packets,
13109                              u32 rate, u32 intvl, gfp_t gfp)
13110 {
13111         struct sk_buff *msg;
13112
13113         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13114         if (!msg)
13115                 return;
13116
13117         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
13118                 goto nla_put_failure;
13119
13120         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
13121                 goto nla_put_failure;
13122
13123         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
13124                 goto nla_put_failure;
13125
13126         cfg80211_send_cqm(msg, gfp);
13127         return;
13128
13129  nla_put_failure:
13130         nlmsg_free(msg);
13131 }
13132 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
13133
13134 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
13135                                  const u8 *peer, u32 num_packets, gfp_t gfp)
13136 {
13137         struct sk_buff *msg;
13138
13139         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
13140
13141         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13142         if (!msg)
13143                 return;
13144
13145         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
13146                 goto nla_put_failure;
13147
13148         cfg80211_send_cqm(msg, gfp);
13149         return;
13150
13151  nla_put_failure:
13152         nlmsg_free(msg);
13153 }
13154 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
13155
13156 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
13157 {
13158         struct sk_buff *msg;
13159
13160         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13161         if (!msg)
13162                 return;
13163
13164         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
13165                 goto nla_put_failure;
13166
13167         cfg80211_send_cqm(msg, gfp);
13168         return;
13169
13170  nla_put_failure:
13171         nlmsg_free(msg);
13172 }
13173 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
13174
13175 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
13176                                      struct net_device *netdev, const u8 *bssid,
13177                                      const u8 *replay_ctr, gfp_t gfp)
13178 {
13179         struct sk_buff *msg;
13180         struct nlattr *rekey_attr;
13181         void *hdr;
13182
13183         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13184         if (!msg)
13185                 return;
13186
13187         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
13188         if (!hdr) {
13189                 nlmsg_free(msg);
13190                 return;
13191         }
13192
13193         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13194             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13195             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13196                 goto nla_put_failure;
13197
13198         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
13199         if (!rekey_attr)
13200                 goto nla_put_failure;
13201
13202         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
13203                     NL80211_REPLAY_CTR_LEN, replay_ctr))
13204                 goto nla_put_failure;
13205
13206         nla_nest_end(msg, rekey_attr);
13207
13208         genlmsg_end(msg, hdr);
13209
13210         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13211                                 NL80211_MCGRP_MLME, gfp);
13212         return;
13213
13214  nla_put_failure:
13215         genlmsg_cancel(msg, hdr);
13216         nlmsg_free(msg);
13217 }
13218
13219 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
13220                                const u8 *replay_ctr, gfp_t gfp)
13221 {
13222         struct wireless_dev *wdev = dev->ieee80211_ptr;
13223         struct wiphy *wiphy = wdev->wiphy;
13224         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13225
13226         trace_cfg80211_gtk_rekey_notify(dev, bssid);
13227         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
13228 }
13229 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
13230
13231 static void
13232 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
13233                                struct net_device *netdev, int index,
13234                                const u8 *bssid, bool preauth, gfp_t gfp)
13235 {
13236         struct sk_buff *msg;
13237         struct nlattr *attr;
13238         void *hdr;
13239
13240         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13241         if (!msg)
13242                 return;
13243
13244         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
13245         if (!hdr) {
13246                 nlmsg_free(msg);
13247                 return;
13248         }
13249
13250         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13251             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13252                 goto nla_put_failure;
13253
13254         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
13255         if (!attr)
13256                 goto nla_put_failure;
13257
13258         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
13259             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
13260             (preauth &&
13261              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
13262                 goto nla_put_failure;
13263
13264         nla_nest_end(msg, attr);
13265
13266         genlmsg_end(msg, hdr);
13267
13268         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13269                                 NL80211_MCGRP_MLME, gfp);
13270         return;
13271
13272  nla_put_failure:
13273         genlmsg_cancel(msg, hdr);
13274         nlmsg_free(msg);
13275 }
13276
13277 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
13278                                      const u8 *bssid, bool preauth, gfp_t gfp)
13279 {
13280         struct wireless_dev *wdev = dev->ieee80211_ptr;
13281         struct wiphy *wiphy = wdev->wiphy;
13282         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13283
13284         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
13285         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
13286 }
13287 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
13288
13289 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
13290                                      struct net_device *netdev,
13291                                      struct cfg80211_chan_def *chandef,
13292                                      gfp_t gfp,
13293                                      enum nl80211_commands notif,
13294                                      u8 count)
13295 {
13296         struct sk_buff *msg;
13297         void *hdr;
13298
13299         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13300         if (!msg)
13301                 return;
13302
13303         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
13304         if (!hdr) {
13305                 nlmsg_free(msg);
13306                 return;
13307         }
13308
13309         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13310                 goto nla_put_failure;
13311
13312         if (nl80211_send_chandef(msg, chandef))
13313                 goto nla_put_failure;
13314
13315         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
13316             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
13317                         goto nla_put_failure;
13318
13319         genlmsg_end(msg, hdr);
13320
13321         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13322                                 NL80211_MCGRP_MLME, gfp);
13323         return;
13324
13325  nla_put_failure:
13326         genlmsg_cancel(msg, hdr);
13327         nlmsg_free(msg);
13328 }
13329
13330 void cfg80211_ch_switch_notify(struct net_device *dev,
13331                                struct cfg80211_chan_def *chandef)
13332 {
13333         struct wireless_dev *wdev = dev->ieee80211_ptr;
13334         struct wiphy *wiphy = wdev->wiphy;
13335         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13336
13337         ASSERT_WDEV_LOCK(wdev);
13338
13339         trace_cfg80211_ch_switch_notify(dev, chandef);
13340
13341         wdev->chandef = *chandef;
13342         wdev->preset_chandef = *chandef;
13343         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13344                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13345 }
13346 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13347
13348 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13349                                        struct cfg80211_chan_def *chandef,
13350                                        u8 count)
13351 {
13352         struct wireless_dev *wdev = dev->ieee80211_ptr;
13353         struct wiphy *wiphy = wdev->wiphy;
13354         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13355
13356         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13357
13358         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13359                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13360 }
13361 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13362
13363 void
13364 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13365                      const struct cfg80211_chan_def *chandef,
13366                      enum nl80211_radar_event event,
13367                      struct net_device *netdev, gfp_t gfp)
13368 {
13369         struct sk_buff *msg;
13370         void *hdr;
13371
13372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13373         if (!msg)
13374                 return;
13375
13376         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13377         if (!hdr) {
13378                 nlmsg_free(msg);
13379                 return;
13380         }
13381
13382         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13383                 goto nla_put_failure;
13384
13385         /* NOP and radar events don't need a netdev parameter */
13386         if (netdev) {
13387                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13388
13389                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13390                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13391                                       NL80211_ATTR_PAD))
13392                         goto nla_put_failure;
13393         }
13394
13395         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13396                 goto nla_put_failure;
13397
13398         if (nl80211_send_chandef(msg, chandef))
13399                 goto nla_put_failure;
13400
13401         genlmsg_end(msg, hdr);
13402
13403         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13404                                 NL80211_MCGRP_MLME, gfp);
13405         return;
13406
13407  nla_put_failure:
13408         genlmsg_cancel(msg, hdr);
13409         nlmsg_free(msg);
13410 }
13411
13412 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13413                            u64 cookie, bool acked, gfp_t gfp)
13414 {
13415         struct wireless_dev *wdev = dev->ieee80211_ptr;
13416         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13417         struct sk_buff *msg;
13418         void *hdr;
13419
13420         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13421
13422         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13423
13424         if (!msg)
13425                 return;
13426
13427         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13428         if (!hdr) {
13429                 nlmsg_free(msg);
13430                 return;
13431         }
13432
13433         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13434             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13435             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13436             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13437                               NL80211_ATTR_PAD) ||
13438             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13439                 goto nla_put_failure;
13440
13441         genlmsg_end(msg, hdr);
13442
13443         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13444                                 NL80211_MCGRP_MLME, gfp);
13445         return;
13446
13447  nla_put_failure:
13448         genlmsg_cancel(msg, hdr);
13449         nlmsg_free(msg);
13450 }
13451 EXPORT_SYMBOL(cfg80211_probe_status);
13452
13453 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13454                                  const u8 *frame, size_t len,
13455                                  int freq, int sig_dbm)
13456 {
13457         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13458         struct sk_buff *msg;
13459         void *hdr;
13460         struct cfg80211_beacon_registration *reg;
13461
13462         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13463
13464         spin_lock_bh(&rdev->beacon_registrations_lock);
13465         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13466                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13467                 if (!msg) {
13468                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13469                         return;
13470                 }
13471
13472                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13473                 if (!hdr)
13474                         goto nla_put_failure;
13475
13476                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13477                     (freq &&
13478                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13479                     (sig_dbm &&
13480                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13481                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13482                         goto nla_put_failure;
13483
13484                 genlmsg_end(msg, hdr);
13485
13486                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13487         }
13488         spin_unlock_bh(&rdev->beacon_registrations_lock);
13489         return;
13490
13491  nla_put_failure:
13492         spin_unlock_bh(&rdev->beacon_registrations_lock);
13493         if (hdr)
13494                 genlmsg_cancel(msg, hdr);
13495         nlmsg_free(msg);
13496 }
13497 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13498
13499 #ifdef CONFIG_PM
13500 static int cfg80211_net_detect_results(struct sk_buff *msg,
13501                                        struct cfg80211_wowlan_wakeup *wakeup)
13502 {
13503         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13504         struct nlattr *nl_results, *nl_match, *nl_freqs;
13505         int i, j;
13506
13507         nl_results = nla_nest_start(
13508                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13509         if (!nl_results)
13510                 return -EMSGSIZE;
13511
13512         for (i = 0; i < nd->n_matches; i++) {
13513                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13514
13515                 nl_match = nla_nest_start(msg, i);
13516                 if (!nl_match)
13517                         break;
13518
13519                 /* The SSID attribute is optional in nl80211, but for
13520                  * simplicity reasons it's always present in the
13521                  * cfg80211 structure.  If a driver can't pass the
13522                  * SSID, that needs to be changed.  A zero length SSID
13523                  * is still a valid SSID (wildcard), so it cannot be
13524                  * used for this purpose.
13525                  */
13526                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13527                             match->ssid.ssid)) {
13528                         nla_nest_cancel(msg, nl_match);
13529                         goto out;
13530                 }
13531
13532                 if (match->n_channels) {
13533                         nl_freqs = nla_nest_start(
13534                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13535                         if (!nl_freqs) {
13536                                 nla_nest_cancel(msg, nl_match);
13537                                 goto out;
13538                         }
13539
13540                         for (j = 0; j < match->n_channels; j++) {
13541                                 if (nla_put_u32(msg, j, match->channels[j])) {
13542                                         nla_nest_cancel(msg, nl_freqs);
13543                                         nla_nest_cancel(msg, nl_match);
13544                                         goto out;
13545                                 }
13546                         }
13547
13548                         nla_nest_end(msg, nl_freqs);
13549                 }
13550
13551                 nla_nest_end(msg, nl_match);
13552         }
13553
13554 out:
13555         nla_nest_end(msg, nl_results);
13556         return 0;
13557 }
13558
13559 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13560                                    struct cfg80211_wowlan_wakeup *wakeup,
13561                                    gfp_t gfp)
13562 {
13563         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13564         struct sk_buff *msg;
13565         void *hdr;
13566         int size = 200;
13567
13568         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13569
13570         if (wakeup)
13571                 size += wakeup->packet_present_len;
13572
13573         msg = nlmsg_new(size, gfp);
13574         if (!msg)
13575                 return;
13576
13577         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13578         if (!hdr)
13579                 goto free_msg;
13580
13581         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13582             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13583                               NL80211_ATTR_PAD))
13584                 goto free_msg;
13585
13586         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13587                                         wdev->netdev->ifindex))
13588                 goto free_msg;
13589
13590         if (wakeup) {
13591                 struct nlattr *reasons;
13592
13593                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13594                 if (!reasons)
13595                         goto free_msg;
13596
13597                 if (wakeup->disconnect &&
13598                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13599                         goto free_msg;
13600                 if (wakeup->magic_pkt &&
13601                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13602                         goto free_msg;
13603                 if (wakeup->gtk_rekey_failure &&
13604                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13605                         goto free_msg;
13606                 if (wakeup->eap_identity_req &&
13607                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13608                         goto free_msg;
13609                 if (wakeup->four_way_handshake &&
13610                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13611                         goto free_msg;
13612                 if (wakeup->rfkill_release &&
13613                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13614                         goto free_msg;
13615
13616                 if (wakeup->pattern_idx >= 0 &&
13617                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13618                                 wakeup->pattern_idx))
13619                         goto free_msg;
13620
13621                 if (wakeup->tcp_match &&
13622                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13623                         goto free_msg;
13624
13625                 if (wakeup->tcp_connlost &&
13626                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13627                         goto free_msg;
13628
13629                 if (wakeup->tcp_nomoretokens &&
13630                     nla_put_flag(msg,
13631                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13632                         goto free_msg;
13633
13634                 if (wakeup->packet) {
13635                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13636                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13637
13638                         if (!wakeup->packet_80211) {
13639                                 pkt_attr =
13640                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13641                                 len_attr =
13642                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13643                         }
13644
13645                         if (wakeup->packet_len &&
13646                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13647                                 goto free_msg;
13648
13649                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13650                                     wakeup->packet))
13651                                 goto free_msg;
13652                 }
13653
13654                 if (wakeup->net_detect &&
13655                     cfg80211_net_detect_results(msg, wakeup))
13656                                 goto free_msg;
13657
13658                 nla_nest_end(msg, reasons);
13659         }
13660
13661         genlmsg_end(msg, hdr);
13662
13663         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13664                                 NL80211_MCGRP_MLME, gfp);
13665         return;
13666
13667  free_msg:
13668         nlmsg_free(msg);
13669 }
13670 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13671 #endif
13672
13673 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13674                                 enum nl80211_tdls_operation oper,
13675                                 u16 reason_code, gfp_t gfp)
13676 {
13677         struct wireless_dev *wdev = dev->ieee80211_ptr;
13678         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13679         struct sk_buff *msg;
13680         void *hdr;
13681
13682         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13683                                          reason_code);
13684
13685         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13686         if (!msg)
13687                 return;
13688
13689         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13690         if (!hdr) {
13691                 nlmsg_free(msg);
13692                 return;
13693         }
13694
13695         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13696             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13697             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13698             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13699             (reason_code > 0 &&
13700              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13701                 goto nla_put_failure;
13702
13703         genlmsg_end(msg, hdr);
13704
13705         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13706                                 NL80211_MCGRP_MLME, gfp);
13707         return;
13708
13709  nla_put_failure:
13710         genlmsg_cancel(msg, hdr);
13711         nlmsg_free(msg);
13712 }
13713 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13714
13715 static int nl80211_netlink_notify(struct notifier_block * nb,
13716                                   unsigned long state,
13717                                   void *_notify)
13718 {
13719         struct netlink_notify *notify = _notify;
13720         struct cfg80211_registered_device *rdev;
13721         struct wireless_dev *wdev;
13722         struct cfg80211_beacon_registration *reg, *tmp;
13723
13724         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13725                 return NOTIFY_DONE;
13726
13727         rcu_read_lock();
13728
13729         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13730                 bool schedule_destroy_work = false;
13731                 bool schedule_scan_stop = false;
13732                 struct cfg80211_sched_scan_request *sched_scan_req =
13733                         rcu_dereference(rdev->sched_scan_req);
13734
13735                 if (sched_scan_req && notify->portid &&
13736                     sched_scan_req->owner_nlportid == notify->portid)
13737                         schedule_scan_stop = true;
13738
13739                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
13740                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13741
13742                         if (wdev->owner_nlportid == notify->portid)
13743                                 schedule_destroy_work = true;
13744                 }
13745
13746                 spin_lock_bh(&rdev->beacon_registrations_lock);
13747                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13748                                          list) {
13749                         if (reg->nlportid == notify->portid) {
13750                                 list_del(&reg->list);
13751                                 kfree(reg);
13752                                 break;
13753                         }
13754                 }
13755                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13756
13757                 if (schedule_destroy_work) {
13758                         struct cfg80211_iface_destroy *destroy;
13759
13760                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13761                         if (destroy) {
13762                                 destroy->nlportid = notify->portid;
13763                                 spin_lock(&rdev->destroy_list_lock);
13764                                 list_add(&destroy->list, &rdev->destroy_list);
13765                                 spin_unlock(&rdev->destroy_list_lock);
13766                                 schedule_work(&rdev->destroy_work);
13767                         }
13768                 } else if (schedule_scan_stop) {
13769                         sched_scan_req->owner_nlportid = 0;
13770
13771                         if (rdev->ops->sched_scan_stop &&
13772                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13773                                 schedule_work(&rdev->sched_scan_stop_wk);
13774                 }
13775         }
13776
13777         rcu_read_unlock();
13778
13779         /*
13780          * It is possible that the user space process that is controlling the
13781          * indoor setting disappeared, so notify the regulatory core.
13782          */
13783         regulatory_netlink_notify(notify->portid);
13784         return NOTIFY_OK;
13785 }
13786
13787 static struct notifier_block nl80211_netlink_notifier = {
13788         .notifier_call = nl80211_netlink_notify,
13789 };
13790
13791 void cfg80211_ft_event(struct net_device *netdev,
13792                        struct cfg80211_ft_event_params *ft_event)
13793 {
13794         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13795         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13796         struct sk_buff *msg;
13797         void *hdr;
13798
13799         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13800
13801         if (!ft_event->target_ap)
13802                 return;
13803
13804         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13805         if (!msg)
13806                 return;
13807
13808         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13809         if (!hdr)
13810                 goto out;
13811
13812         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13813             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13814             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13815                 goto out;
13816
13817         if (ft_event->ies &&
13818             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13819                 goto out;
13820         if (ft_event->ric_ies &&
13821             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13822                     ft_event->ric_ies))
13823                 goto out;
13824
13825         genlmsg_end(msg, hdr);
13826
13827         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13828                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13829         return;
13830  out:
13831         nlmsg_free(msg);
13832 }
13833 EXPORT_SYMBOL(cfg80211_ft_event);
13834
13835 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13836 {
13837         struct cfg80211_registered_device *rdev;
13838         struct sk_buff *msg;
13839         void *hdr;
13840         u32 nlportid;
13841
13842         rdev = wiphy_to_rdev(wdev->wiphy);
13843         if (!rdev->crit_proto_nlportid)
13844                 return;
13845
13846         nlportid = rdev->crit_proto_nlportid;
13847         rdev->crit_proto_nlportid = 0;
13848
13849         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13850         if (!msg)
13851                 return;
13852
13853         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13854         if (!hdr)
13855                 goto nla_put_failure;
13856
13857         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13858             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13859                               NL80211_ATTR_PAD))
13860                 goto nla_put_failure;
13861
13862         genlmsg_end(msg, hdr);
13863
13864         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13865         return;
13866
13867  nla_put_failure:
13868         if (hdr)
13869                 genlmsg_cancel(msg, hdr);
13870         nlmsg_free(msg);
13871 }
13872 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13873
13874 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13875 {
13876         struct wiphy *wiphy = wdev->wiphy;
13877         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13878         struct sk_buff *msg;
13879         void *hdr;
13880
13881         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13882         if (!msg)
13883                 return;
13884
13885         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13886         if (!hdr)
13887                 goto out;
13888
13889         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13890             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13891             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13892                               NL80211_ATTR_PAD))
13893                 goto out;
13894
13895         genlmsg_end(msg, hdr);
13896
13897         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13898                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13899         return;
13900  out:
13901         nlmsg_free(msg);
13902 }
13903
13904 /* initialisation/exit functions */
13905
13906 int nl80211_init(void)
13907 {
13908         int err;
13909
13910         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13911                                                    nl80211_mcgrps);
13912         if (err)
13913                 return err;
13914
13915         err = netlink_register_notifier(&nl80211_netlink_notifier);
13916         if (err)
13917                 goto err_out;
13918
13919         return 0;
13920  err_out:
13921         genl_unregister_family(&nl80211_fam);
13922         return err;
13923 }
13924
13925 void nl80211_exit(void)
13926 {
13927         netlink_unregister_notifier(&nl80211_netlink_notifier);
13928         genl_unregister_family(&nl80211_fam);
13929 }