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 };
 409
 410 /* policy for the key attributes */
 411 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 412         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 413         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 414         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 415         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 416         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 417         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 418         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 419         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 420 };
 421
 422 /* policy for the key default flags */
 423 static const struct nla_policy
 424 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 425         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 426         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 427 };
 428
 429 /* policy for WoWLAN attributes */
 430 static const struct nla_policy
 431 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 432         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 433         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 434         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 435         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 436         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 439         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 440         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 441         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 442 };
 443
 444 static const struct nla_policy
 445 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 446         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 447         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 448         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 449         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 450         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 451         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 452         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 453                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 454         },
 455         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 456                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 457         },
 458         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 459         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 460         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 461 };
 462
 463 /* policy for coalesce rule attributes */
 464 static const struct nla_policy
 465 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 466         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 467         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 468         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 469 };
 470
 471 /* policy for GTK rekey offload attributes */
 472 static const struct nla_policy
 473 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 474         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 475         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 476         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 477 };
 478
 479 static const struct nla_policy
 480 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 481         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 482                                                  .len = IEEE80211_MAX_SSID_LEN },
 483         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 484 };
 485
 486 static const struct nla_policy
 487 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 488         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 489         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 490 };
 491
 492 static const struct nla_policy
 493 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 494         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 495         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 496         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 497                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 498         },
 499 };
 500
 501 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 502                                      struct netlink_callback *cb,
 503                                      struct cfg80211_registered_device **rdev,
 504                                      struct wireless_dev **wdev)
 505 {
 506         int err;
 507
 508         rtnl_lock();
 509
 510         if (!cb->args[0]) {
 511                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 512                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 513                                   nl80211_policy);
 514                 if (err)
 515                         goto out_unlock;
 516
 517                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 518                                                    nl80211_fam.attrbuf);
 519                 if (IS_ERR(*wdev)) {
 520                         err = PTR_ERR(*wdev);
 521                         goto out_unlock;
 522                 }
 523                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 524                 /* 0 is the first index - add 1 to parse only once */
 525                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 526                 cb->args[1] = (*wdev)->identifier;
 527         } else {
 528                 /* subtract the 1 again here */
 529                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 530                 struct wireless_dev *tmp;
 531
 532                 if (!wiphy) {
 533                         err = -ENODEV;
 534                         goto out_unlock;
 535                 }
 536                 *rdev = wiphy_to_rdev(wiphy);
 537                 *wdev = NULL;
 538
 539                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 540                         if (tmp->identifier == cb->args[1]) {
 541                                 *wdev = tmp;
 542                                 break;
 543                         }
 544                 }
 545
 546                 if (!*wdev) {
 547                         err = -ENODEV;
 548                         goto out_unlock;
 549                 }
 550         }
 551
 552         return 0;
 553  out_unlock:
 554         rtnl_unlock();
 555         return err;
 556 }
 557
 558 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 559 {
 560         rtnl_unlock();
 561 }
 562
 563 /* IE validation */
 564 static bool is_valid_ie_attr(const struct nlattr *attr)
 565 {
 566         const u8 *pos;
 567         int len;
 568
 569         if (!attr)
 570                 return true;
 571
 572         pos = nla_data(attr);
 573         len = nla_len(attr);
 574
 575         while (len) {
 576                 u8 elemlen;
 577
 578                 if (len < 2)
 579                         return false;
 580                 len -= 2;
 581
 582                 elemlen = pos[1];
 583                 if (elemlen > len)
 584                         return false;
 585
 586                 len -= elemlen;
 587                 pos += 2 + elemlen;
 588         }
 589
 590         return true;
 591 }
 592
 593 /* message building helper */
 594 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 595                                    int flags, u8 cmd)
 596 {
 597         /* since there is no private header just add the generic one */
 598         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 599 }
 600
 601 static int nl80211_msg_put_channel(struct sk_buff *msg,
 602                                    struct ieee80211_channel *chan,
 603                                    bool large)
 604 {
 605         /* Some channels must be completely excluded from the
 606          * list to protect old user-space tools from breaking
 607          */
 608         if (!large && chan->flags &
 609             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 610                 return 0;
 611
 612         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 613                         chan->center_freq))
 614                 goto nla_put_failure;
 615
 616         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 617             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 618                 goto nla_put_failure;
 619         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 620                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 621                         goto nla_put_failure;
 622                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 623                         goto nla_put_failure;
 624         }
 625         if (chan->flags & IEEE80211_CHAN_RADAR) {
 626                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 627                         goto nla_put_failure;
 628                 if (large) {
 629                         u32 time;
 630
 631                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 632
 633                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 634                                         chan->dfs_state))
 635                                 goto nla_put_failure;
 636                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 637                                         time))
 638                                 goto nla_put_failure;
 639                         if (nla_put_u32(msg,
 640                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 641                                         chan->dfs_cac_ms))
 642                                 goto nla_put_failure;
 643                 }
 644         }
 645
 646         if (large) {
 647                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 648                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 649                         goto nla_put_failure;
 650                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 651                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 652                         goto nla_put_failure;
 653                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 654                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 655                         goto nla_put_failure;
 656                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 657                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 658                         goto nla_put_failure;
 659                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 660                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 661                         goto nla_put_failure;
 662                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 663                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 664                         goto nla_put_failure;
 665                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 666                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 667                         goto nla_put_failure;
 668                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 669                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 670                         goto nla_put_failure;
 671         }
 672
 673         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 674                         DBM_TO_MBM(chan->max_power)))
 675                 goto nla_put_failure;
 676
 677         return 0;
 678
 679  nla_put_failure:
 680         return -ENOBUFS;
 681 }
 682
 683 /* netlink command implementations */
 684
 685 struct key_parse {
 686         struct key_params p;
 687         int idx;
 688         int type;
 689         bool def, defmgmt;
 690         bool def_uni, def_multi;
 691 };
 692
 693 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 694 {
 695         struct nlattr *tb[NL80211_KEY_MAX + 1];
 696         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 697                                    nl80211_key_policy);
 698         if (err)
 699                 return err;
 700
 701         k->def = !!tb[NL80211_KEY_DEFAULT];
 702         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 703
 704         if (k->def) {
 705                 k->def_uni = true;
 706                 k->def_multi = true;
 707         }
 708         if (k->defmgmt)
 709                 k->def_multi = true;
 710
 711         if (tb[NL80211_KEY_IDX])
 712                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 713
 714         if (tb[NL80211_KEY_DATA]) {
 715                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 716                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 717         }
 718
 719         if (tb[NL80211_KEY_SEQ]) {
 720                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 721                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 722         }
 723
 724         if (tb[NL80211_KEY_CIPHER])
 725                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 726
 727         if (tb[NL80211_KEY_TYPE]) {
 728                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 729                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 730                         return -EINVAL;
 731         }
 732
 733         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 734                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 735
 736                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 737                                        tb[NL80211_KEY_DEFAULT_TYPES],
 738                                        nl80211_key_default_policy);
 739                 if (err)
 740                         return err;
 741
 742                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 743                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 744         }
 745
 746         return 0;
 747 }
 748
 749 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 750 {
 751         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 752                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 753                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 754         }
 755
 756         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 757                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 758                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 759         }
 760
 761         if (info->attrs[NL80211_ATTR_KEY_IDX])
 762                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 763
 764         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 765                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 766
 767         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 768         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 769
 770         if (k->def) {
 771                 k->def_uni = true;
 772                 k->def_multi = true;
 773         }
 774         if (k->defmgmt)
 775                 k->def_multi = true;
 776
 777         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 778                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 779                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 780                         return -EINVAL;
 781         }
 782
 783         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 784                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 785                 int err = nla_parse_nested(
 786                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 787                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 788                                 nl80211_key_default_policy);
 789                 if (err)
 790                         return err;
 791
 792                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 793                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 794         }
 795
 796         return 0;
 797 }
 798
 799 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 800 {
 801         int err;
 802
 803         memset(k, 0, sizeof(*k));
 804         k->idx = -1;
 805         k->type = -1;
 806
 807         if (info->attrs[NL80211_ATTR_KEY])
 808                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 809         else
 810                 err = nl80211_parse_key_old(info, k);
 811
 812         if (err)
 813                 return err;
 814
 815         if (k->def && k->defmgmt)
 816                 return -EINVAL;
 817
 818         if (k->defmgmt) {
 819                 if (k->def_uni || !k->def_multi)
 820                         return -EINVAL;
 821         }
 822
 823         if (k->idx != -1) {
 824                 if (k->defmgmt) {
 825                         if (k->idx < 4 || k->idx > 5)
 826                                 return -EINVAL;
 827                 } else if (k->def) {
 828                         if (k->idx < 0 || k->idx > 3)
 829                                 return -EINVAL;
 830                 } else {
 831                         if (k->idx < 0 || k->idx > 5)
 832                                 return -EINVAL;
 833                 }
 834         }
 835
 836         return 0;
 837 }
 838
 839 static struct cfg80211_cached_keys *
 840 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 841                        struct nlattr *keys, bool *no_ht)
 842 {
 843         struct key_parse parse;
 844         struct nlattr *key;
 845         struct cfg80211_cached_keys *result;
 846         int rem, err, def = 0;
 847
 848         result = kzalloc(sizeof(*result), GFP_KERNEL);
 849         if (!result)
 850                 return ERR_PTR(-ENOMEM);
 851
 852         result->def = -1;
 853         result->defmgmt = -1;
 854
 855         nla_for_each_nested(key, keys, rem) {
 856                 memset(&parse, 0, sizeof(parse));
 857                 parse.idx = -1;
 858
 859                 err = nl80211_parse_key_new(key, &parse);
 860                 if (err)
 861                         goto error;
 862                 err = -EINVAL;
 863                 if (!parse.p.key)
 864                         goto error;
 865                 if (parse.idx < 0 || parse.idx > 4)
 866                         goto error;
 867                 if (parse.def) {
 868                         if (def)
 869                                 goto error;
 870                         def = 1;
 871                         result->def = parse.idx;
 872                         if (!parse.def_uni || !parse.def_multi)
 873                                 goto error;
 874                 } else if (parse.defmgmt)
 875                         goto error;
 876                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 877                                                      parse.idx, false, NULL);
 878                 if (err)
 879                         goto error;
 880                 result->params[parse.idx].cipher = parse.p.cipher;
 881                 result->params[parse.idx].key_len = parse.p.key_len;
 882                 result->params[parse.idx].key = result->data[parse.idx];
 883                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 884
 885                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 886                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 887                         if (no_ht)
 888                                 *no_ht = true;
 889                 }
 890         }
 891
 892         return result;
 893  error:
 894         kfree(result);
 895         return ERR_PTR(err);
 896 }
 897
 898 static int nl80211_key_allowed(struct wireless_dev *wdev)
 899 {
 900         ASSERT_WDEV_LOCK(wdev);
 901
 902         switch (wdev->iftype) {
 903         case NL80211_IFTYPE_AP:
 904         case NL80211_IFTYPE_AP_VLAN:
 905         case NL80211_IFTYPE_P2P_GO:
 906         case NL80211_IFTYPE_MESH_POINT:
 907                 break;
 908         case NL80211_IFTYPE_ADHOC:
 909         case NL80211_IFTYPE_STATION:
 910         case NL80211_IFTYPE_P2P_CLIENT:
 911                 if (!wdev->current_bss)
 912                         return -ENOLINK;
 913                 break;
 914         case NL80211_IFTYPE_UNSPECIFIED:
 915         case NL80211_IFTYPE_OCB:
 916         case NL80211_IFTYPE_MONITOR:
 917         case NL80211_IFTYPE_P2P_DEVICE:
 918         case NL80211_IFTYPE_WDS:
 919         case NUM_NL80211_IFTYPES:
 920                 return -EINVAL;
 921         }
 922
 923         return 0;
 924 }
 925
 926 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 927                                                         struct nlattr *tb)
 928 {
 929         struct ieee80211_channel *chan;
 930
 931         if (tb == NULL)
 932                 return NULL;
 933         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 934         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 935                 return NULL;
 936         return chan;
 937 }
 938
 939 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 940 {
 941         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 942         int i;
 943
 944         if (!nl_modes)
 945                 goto nla_put_failure;
 946
 947         i = 0;
 948         while (ifmodes) {
 949                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 950                         goto nla_put_failure;
 951                 ifmodes >>= 1;
 952                 i++;
 953         }
 954
 955         nla_nest_end(msg, nl_modes);
 956         return 0;
 957
 958 nla_put_failure:
 959         return -ENOBUFS;
 960 }
 961
 962 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 963                                           struct sk_buff *msg,
 964                                           bool large)
 965 {
 966         struct nlattr *nl_combis;
 967         int i, j;
 968
 969         nl_combis = nla_nest_start(msg,
 970                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 971         if (!nl_combis)
 972                 goto nla_put_failure;
 973
 974         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 975                 const struct ieee80211_iface_combination *c;
 976                 struct nlattr *nl_combi, *nl_limits;
 977
 978                 c = &wiphy->iface_combinations[i];
 979
 980                 nl_combi = nla_nest_start(msg, i + 1);
 981                 if (!nl_combi)
 982                         goto nla_put_failure;
 983
 984                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 985                 if (!nl_limits)
 986                         goto nla_put_failure;
 987
 988                 for (j = 0; j < c->n_limits; j++) {
 989                         struct nlattr *nl_limit;
 990
 991                         nl_limit = nla_nest_start(msg, j + 1);
 992                         if (!nl_limit)
 993                                 goto nla_put_failure;
 994                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 995                                         c->limits[j].max))
 996                                 goto nla_put_failure;
 997                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 998                                                 c->limits[j].types))
 999                                 goto nla_put_failure;
1000                         nla_nest_end(msg, nl_limit);
1001                 }
1002
1003                 nla_nest_end(msg, nl_limits);
1004
1005                 if (c->beacon_int_infra_match &&
1006                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1007                         goto nla_put_failure;
1008                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1009                                 c->num_different_channels) ||
1010                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1011                                 c->max_interfaces))
1012                         goto nla_put_failure;
1013                 if (large &&
1014                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1015                                 c->radar_detect_widths) ||
1016                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1017                                 c->radar_detect_regions)))
1018                         goto nla_put_failure;
1019
1020                 nla_nest_end(msg, nl_combi);
1021         }
1022
1023         nla_nest_end(msg, nl_combis);
1024
1025         return 0;
1026 nla_put_failure:
1027         return -ENOBUFS;
1028 }
1029
1030 #ifdef CONFIG_PM
1031 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1032                                         struct sk_buff *msg)
1033 {
1034         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1035         struct nlattr *nl_tcp;
1036
1037         if (!tcp)
1038                 return 0;
1039
1040         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1041         if (!nl_tcp)
1042                 return -ENOBUFS;
1043
1044         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1045                         tcp->data_payload_max))
1046                 return -ENOBUFS;
1047
1048         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1049                         tcp->data_payload_max))
1050                 return -ENOBUFS;
1051
1052         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1053                 return -ENOBUFS;
1054
1055         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1056                                 sizeof(*tcp->tok), tcp->tok))
1057                 return -ENOBUFS;
1058
1059         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1060                         tcp->data_interval_max))
1061                 return -ENOBUFS;
1062
1063         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1064                         tcp->wake_payload_max))
1065                 return -ENOBUFS;
1066
1067         nla_nest_end(msg, nl_tcp);
1068         return 0;
1069 }
1070
1071 static int nl80211_send_wowlan(struct sk_buff *msg,
1072                                struct cfg80211_registered_device *rdev,
1073                                bool large)
1074 {
1075         struct nlattr *nl_wowlan;
1076
1077         if (!rdev->wiphy.wowlan)
1078                 return 0;
1079
1080         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1081         if (!nl_wowlan)
1082                 return -ENOBUFS;
1083
1084         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1085              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1086             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1087              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1088             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1089              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1090             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1091              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1092             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1093              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1094             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1095              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1096             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1097              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1098             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1099              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1100                 return -ENOBUFS;
1101
1102         if (rdev->wiphy.wowlan->n_patterns) {
1103                 struct nl80211_pattern_support pat = {
1104                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1105                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1106                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1107                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1108                 };
1109
1110                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1111                             sizeof(pat), &pat))
1112                         return -ENOBUFS;
1113         }
1114
1115         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1116             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1117                         rdev->wiphy.wowlan->max_nd_match_sets))
1118                 return -ENOBUFS;
1119
1120         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1121                 return -ENOBUFS;
1122
1123         nla_nest_end(msg, nl_wowlan);
1124
1125         return 0;
1126 }
1127 #endif
1128
1129 static int nl80211_send_coalesce(struct sk_buff *msg,
1130                                  struct cfg80211_registered_device *rdev)
1131 {
1132         struct nl80211_coalesce_rule_support rule;
1133
1134         if (!rdev->wiphy.coalesce)
1135                 return 0;
1136
1137         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1138         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1139         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1140         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1141         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1142         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1143
1144         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1145                 return -ENOBUFS;
1146
1147         return 0;
1148 }
1149
1150 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1151                                       struct ieee80211_supported_band *sband)
1152 {
1153         struct nlattr *nl_rates, *nl_rate;
1154         struct ieee80211_rate *rate;
1155         int i;
1156
1157         /* add HT info */
1158         if (sband->ht_cap.ht_supported &&
1159             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1160                      sizeof(sband->ht_cap.mcs),
1161                      &sband->ht_cap.mcs) ||
1162              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1163                          sband->ht_cap.cap) ||
1164              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1165                         sband->ht_cap.ampdu_factor) ||
1166              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1167                         sband->ht_cap.ampdu_density)))
1168                 return -ENOBUFS;
1169
1170         /* add VHT info */
1171         if (sband->vht_cap.vht_supported &&
1172             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1173                      sizeof(sband->vht_cap.vht_mcs),
1174                      &sband->vht_cap.vht_mcs) ||
1175              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1176                          sband->vht_cap.cap)))
1177                 return -ENOBUFS;
1178
1179         /* add bitrates */
1180         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1181         if (!nl_rates)
1182                 return -ENOBUFS;
1183
1184         for (i = 0; i < sband->n_bitrates; i++) {
1185                 nl_rate = nla_nest_start(msg, i);
1186                 if (!nl_rate)
1187                         return -ENOBUFS;
1188
1189                 rate = &sband->bitrates[i];
1190                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1191                                 rate->bitrate))
1192                         return -ENOBUFS;
1193                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1194                     nla_put_flag(msg,
1195                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1196                         return -ENOBUFS;
1197
1198                 nla_nest_end(msg, nl_rate);
1199         }
1200
1201         nla_nest_end(msg, nl_rates);
1202
1203         return 0;
1204 }
1205
1206 static int
1207 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1208                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1209 {
1210         u16 stypes;
1211         struct nlattr *nl_ftypes, *nl_ifs;
1212         enum nl80211_iftype ift;
1213         int i;
1214
1215         if (!mgmt_stypes)
1216                 return 0;
1217
1218         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1219         if (!nl_ifs)
1220                 return -ENOBUFS;
1221
1222         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1223                 nl_ftypes = nla_nest_start(msg, ift);
1224                 if (!nl_ftypes)
1225                         return -ENOBUFS;
1226                 i = 0;
1227                 stypes = mgmt_stypes[ift].tx;
1228                 while (stypes) {
1229                         if ((stypes & 1) &&
1230                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1231                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1232                                 return -ENOBUFS;
1233                         stypes >>= 1;
1234                         i++;
1235                 }
1236                 nla_nest_end(msg, nl_ftypes);
1237         }
1238
1239         nla_nest_end(msg, nl_ifs);
1240
1241         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1242         if (!nl_ifs)
1243                 return -ENOBUFS;
1244
1245         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1246                 nl_ftypes = nla_nest_start(msg, ift);
1247                 if (!nl_ftypes)
1248                         return -ENOBUFS;
1249                 i = 0;
1250                 stypes = mgmt_stypes[ift].rx;
1251                 while (stypes) {
1252                         if ((stypes & 1) &&
1253                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1254                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1255                                 return -ENOBUFS;
1256                         stypes >>= 1;
1257                         i++;
1258                 }
1259                 nla_nest_end(msg, nl_ftypes);
1260         }
1261         nla_nest_end(msg, nl_ifs);
1262
1263         return 0;
1264 }
1265
1266 struct nl80211_dump_wiphy_state {
1267         s64 filter_wiphy;
1268         long start;
1269         long split_start, band_start, chan_start, capa_start;
1270         bool split;
1271 };
1272
1273 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1274                               enum nl80211_commands cmd,
1275                               struct sk_buff *msg, u32 portid, u32 seq,
1276                               int flags, struct nl80211_dump_wiphy_state *state)
1277 {
1278         void *hdr;
1279         struct nlattr *nl_bands, *nl_band;
1280         struct nlattr *nl_freqs, *nl_freq;
1281         struct nlattr *nl_cmds;
1282         enum nl80211_band band;
1283         struct ieee80211_channel *chan;
1284         int i;
1285         const struct ieee80211_txrx_stypes *mgmt_stypes =
1286                                 rdev->wiphy.mgmt_stypes;
1287         u32 features;
1288
1289         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1290         if (!hdr)
1291                 return -ENOBUFS;
1292
1293         if (WARN_ON(!state))
1294                 return -EINVAL;
1295
1296         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1297             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1298                            wiphy_name(&rdev->wiphy)) ||
1299             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1300                         cfg80211_rdev_list_generation))
1301                 goto nla_put_failure;
1302
1303         if (cmd != NL80211_CMD_NEW_WIPHY)
1304                 goto finish;
1305
1306         switch (state->split_start) {
1307         case 0:
1308                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1309                                rdev->wiphy.retry_short) ||
1310                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1311                                rdev->wiphy.retry_long) ||
1312                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1313                                 rdev->wiphy.frag_threshold) ||
1314                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1315                                 rdev->wiphy.rts_threshold) ||
1316                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1317                                rdev->wiphy.coverage_class) ||
1318                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1319                                rdev->wiphy.max_scan_ssids) ||
1320                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1321                                rdev->wiphy.max_sched_scan_ssids) ||
1322                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1323                                 rdev->wiphy.max_scan_ie_len) ||
1324                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1325                                 rdev->wiphy.max_sched_scan_ie_len) ||
1326                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1327                                rdev->wiphy.max_match_sets) ||
1328                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1329                                 rdev->wiphy.max_sched_scan_plans) ||
1330                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1331                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1332                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1333                                 rdev->wiphy.max_sched_scan_plan_iterations))
1334                         goto nla_put_failure;
1335
1336                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1337                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1338                         goto nla_put_failure;
1339                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1340                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1341                         goto nla_put_failure;
1342                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1343                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1344                         goto nla_put_failure;
1345                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1346                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1347                         goto nla_put_failure;
1348                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1349                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1350                         goto nla_put_failure;
1351                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1352                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1353                         goto nla_put_failure;
1354                 state->split_start++;
1355                 if (state->split)
1356                         break;
1357         case 1:
1358                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1359                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1360                             rdev->wiphy.cipher_suites))
1361                         goto nla_put_failure;
1362
1363                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1364                                rdev->wiphy.max_num_pmkids))
1365                         goto nla_put_failure;
1366
1367                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1368                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1369                         goto nla_put_failure;
1370
1371                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1372                                 rdev->wiphy.available_antennas_tx) ||
1373                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1374                                 rdev->wiphy.available_antennas_rx))
1375                         goto nla_put_failure;
1376
1377                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1378                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1379                                 rdev->wiphy.probe_resp_offload))
1380                         goto nla_put_failure;
1381
1382                 if ((rdev->wiphy.available_antennas_tx ||
1383                      rdev->wiphy.available_antennas_rx) &&
1384                     rdev->ops->get_antenna) {
1385                         u32 tx_ant = 0, rx_ant = 0;
1386                         int res;
1387
1388                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1389                         if (!res) {
1390                                 if (nla_put_u32(msg,
1391                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1392                                                 tx_ant) ||
1393                                     nla_put_u32(msg,
1394                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1395                                                 rx_ant))
1396                                         goto nla_put_failure;
1397                         }
1398                 }
1399
1400                 state->split_start++;
1401                 if (state->split)
1402                         break;
1403         case 2:
1404                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1405                                         rdev->wiphy.interface_modes))
1406                                 goto nla_put_failure;
1407                 state->split_start++;
1408                 if (state->split)
1409                         break;
1410         case 3:
1411                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1412                 if (!nl_bands)
1413                         goto nla_put_failure;
1414
1415                 for (band = state->band_start;
1416                      band < NUM_NL80211_BANDS; band++) {
1417                         struct ieee80211_supported_band *sband;
1418
1419                         sband = rdev->wiphy.bands[band];
1420
1421                         if (!sband)
1422                                 continue;
1423
1424                         nl_band = nla_nest_start(msg, band);
1425                         if (!nl_band)
1426                                 goto nla_put_failure;
1427
1428                         switch (state->chan_start) {
1429                         case 0:
1430                                 if (nl80211_send_band_rateinfo(msg, sband))
1431                                         goto nla_put_failure;
1432                                 state->chan_start++;
1433                                 if (state->split)
1434                                         break;
1435                         default:
1436                                 /* add frequencies */
1437                                 nl_freqs = nla_nest_start(
1438                                         msg, NL80211_BAND_ATTR_FREQS);
1439                                 if (!nl_freqs)
1440                                         goto nla_put_failure;
1441
1442                                 for (i = state->chan_start - 1;
1443                                      i < sband->n_channels;
1444                                      i++) {
1445                                         nl_freq = nla_nest_start(msg, i);
1446                                         if (!nl_freq)
1447                                                 goto nla_put_failure;
1448
1449                                         chan = &sband->channels[i];
1450
1451                                         if (nl80211_msg_put_channel(
1452                                                         msg, chan,
1453                                                         state->split))
1454                                                 goto nla_put_failure;
1455
1456                                         nla_nest_end(msg, nl_freq);
1457                                         if (state->split)
1458                                                 break;
1459                                 }
1460                                 if (i < sband->n_channels)
1461                                         state->chan_start = i + 2;
1462                                 else
1463                                         state->chan_start = 0;
1464                                 nla_nest_end(msg, nl_freqs);
1465                         }
1466
1467                         nla_nest_end(msg, nl_band);
1468
1469                         if (state->split) {
1470                                 /* start again here */
1471                                 if (state->chan_start)
1472                                         band--;
1473                                 break;
1474                         }
1475                 }
1476                 nla_nest_end(msg, nl_bands);
1477
1478                 if (band < NUM_NL80211_BANDS)
1479                         state->band_start = band + 1;
1480                 else
1481                         state->band_start = 0;
1482
1483                 /* if bands & channels are done, continue outside */
1484                 if (state->band_start == 0 && state->chan_start == 0)
1485                         state->split_start++;
1486                 if (state->split)
1487                         break;
1488         case 4:
1489                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1490                 if (!nl_cmds)
1491                         goto nla_put_failure;
1492
1493                 i = 0;
1494 #define CMD(op, n)                                                      \
1495                  do {                                                   \
1496                         if (rdev->ops->op) {                            \
1497                                 i++;                                    \
1498                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1499                                         goto nla_put_failure;           \
1500                         }                                               \
1501                 } while (0)
1502
1503                 CMD(add_virtual_intf, NEW_INTERFACE);
1504                 CMD(change_virtual_intf, SET_INTERFACE);
1505                 CMD(add_key, NEW_KEY);
1506                 CMD(start_ap, START_AP);
1507                 CMD(add_station, NEW_STATION);
1508                 CMD(add_mpath, NEW_MPATH);
1509                 CMD(update_mesh_config, SET_MESH_CONFIG);
1510                 CMD(change_bss, SET_BSS);
1511                 CMD(auth, AUTHENTICATE);
1512                 CMD(assoc, ASSOCIATE);
1513                 CMD(deauth, DEAUTHENTICATE);
1514                 CMD(disassoc, DISASSOCIATE);
1515                 CMD(join_ibss, JOIN_IBSS);
1516                 CMD(join_mesh, JOIN_MESH);
1517                 CMD(set_pmksa, SET_PMKSA);
1518                 CMD(del_pmksa, DEL_PMKSA);
1519                 CMD(flush_pmksa, FLUSH_PMKSA);
1520                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1521                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1522                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1523                 CMD(mgmt_tx, FRAME);
1524                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1525                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1526                         i++;
1527                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1528                                 goto nla_put_failure;
1529                 }
1530                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1531                     rdev->ops->join_mesh) {
1532                         i++;
1533                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1534                                 goto nla_put_failure;
1535                 }
1536                 CMD(set_wds_peer, SET_WDS_PEER);
1537                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1538                         CMD(tdls_mgmt, TDLS_MGMT);
1539                         CMD(tdls_oper, TDLS_OPER);
1540                 }
1541                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1542                         CMD(sched_scan_start, START_SCHED_SCAN);
1543                 CMD(probe_client, PROBE_CLIENT);
1544                 CMD(set_noack_map, SET_NOACK_MAP);
1545                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1546                         i++;
1547                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1548                                 goto nla_put_failure;
1549                 }
1550                 CMD(start_p2p_device, START_P2P_DEVICE);
1551                 CMD(set_mcast_rate, SET_MCAST_RATE);
1552 #ifdef CONFIG_NL80211_TESTMODE
1553                 CMD(testmode_cmd, TESTMODE);
1554 #endif
1555                 if (state->split) {
1556                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1557                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1558                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1559                                 CMD(channel_switch, CHANNEL_SWITCH);
1560                         CMD(set_qos_map, SET_QOS_MAP);
1561                         if (rdev->wiphy.features &
1562                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1563                                 CMD(add_tx_ts, ADD_TX_TS);
1564                 }
1565                 /* add into the if now */
1566 #undef CMD
1567
1568                 if (rdev->ops->connect || rdev->ops->auth) {
1569                         i++;
1570                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1571                                 goto nla_put_failure;
1572                 }
1573
1574                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1575                         i++;
1576                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1577                                 goto nla_put_failure;
1578                 }
1579
1580                 nla_nest_end(msg, nl_cmds);
1581                 state->split_start++;
1582                 if (state->split)
1583                         break;
1584         case 5:
1585                 if (rdev->ops->remain_on_channel &&
1586                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1587                     nla_put_u32(msg,
1588                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1589                                 rdev->wiphy.max_remain_on_channel_duration))
1590                         goto nla_put_failure;
1591
1592                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1593                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1594                         goto nla_put_failure;
1595
1596                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1597                         goto nla_put_failure;
1598                 state->split_start++;
1599                 if (state->split)
1600                         break;
1601         case 6:
1602 #ifdef CONFIG_PM
1603                 if (nl80211_send_wowlan(msg, rdev, state->split))
1604                         goto nla_put_failure;
1605                 state->split_start++;
1606                 if (state->split)
1607                         break;
1608 #else
1609                 state->split_start++;
1610 #endif
1611         case 7:
1612                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1613                                         rdev->wiphy.software_iftypes))
1614                         goto nla_put_failure;
1615
1616                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1617                                                    state->split))
1618                         goto nla_put_failure;
1619
1620                 state->split_start++;
1621                 if (state->split)
1622                         break;
1623         case 8:
1624                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1625                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1626                                 rdev->wiphy.ap_sme_capa))
1627                         goto nla_put_failure;
1628
1629                 features = rdev->wiphy.features;
1630                 /*
1631                  * We can only add the per-channel limit information if the
1632                  * dump is split, otherwise it makes it too big. Therefore
1633                  * only advertise it in that case.
1634                  */
1635                 if (state->split)
1636                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1637                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1638                         goto nla_put_failure;
1639
1640                 if (rdev->wiphy.ht_capa_mod_mask &&
1641                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1642                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1643                             rdev->wiphy.ht_capa_mod_mask))
1644                         goto nla_put_failure;
1645
1646                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1647                     rdev->wiphy.max_acl_mac_addrs &&
1648                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1649                                 rdev->wiphy.max_acl_mac_addrs))
1650                         goto nla_put_failure;
1651
1652                 /*
1653                  * Any information below this point is only available to
1654                  * applications that can deal with it being split. This
1655                  * helps ensure that newly added capabilities don't break
1656                  * older tools by overrunning their buffers.
1657                  *
1658                  * We still increment split_start so that in the split
1659                  * case we'll continue with more data in the next round,
1660                  * but break unconditionally so unsplit data stops here.
1661                  */
1662                 state->split_start++;
1663                 break;
1664         case 9:
1665                 if (rdev->wiphy.extended_capabilities &&
1666                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1667                              rdev->wiphy.extended_capabilities_len,
1668                              rdev->wiphy.extended_capabilities) ||
1669                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1670                              rdev->wiphy.extended_capabilities_len,
1671                              rdev->wiphy.extended_capabilities_mask)))
1672                         goto nla_put_failure;
1673
1674                 if (rdev->wiphy.vht_capa_mod_mask &&
1675                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1676                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1677                             rdev->wiphy.vht_capa_mod_mask))
1678                         goto nla_put_failure;
1679
1680                 state->split_start++;
1681                 break;
1682         case 10:
1683                 if (nl80211_send_coalesce(msg, rdev))
1684                         goto nla_put_failure;
1685
1686                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1687                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1688                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1689                         goto nla_put_failure;
1690
1691                 if (rdev->wiphy.max_ap_assoc_sta &&
1692                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1693                                 rdev->wiphy.max_ap_assoc_sta))
1694                         goto nla_put_failure;
1695
1696                 state->split_start++;
1697                 break;
1698         case 11:
1699                 if (rdev->wiphy.n_vendor_commands) {
1700                         const struct nl80211_vendor_cmd_info *info;
1701                         struct nlattr *nested;
1702
1703                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1704                         if (!nested)
1705                                 goto nla_put_failure;
1706
1707                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1708                                 info = &rdev->wiphy.vendor_commands[i].info;
1709                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1710                                         goto nla_put_failure;
1711                         }
1712                         nla_nest_end(msg, nested);
1713                 }
1714
1715                 if (rdev->wiphy.n_vendor_events) {
1716                         const struct nl80211_vendor_cmd_info *info;
1717                         struct nlattr *nested;
1718
1719                         nested = nla_nest_start(msg,
1720                                                 NL80211_ATTR_VENDOR_EVENTS);
1721                         if (!nested)
1722                                 goto nla_put_failure;
1723
1724                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1725                                 info = &rdev->wiphy.vendor_events[i];
1726                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1727                                         goto nla_put_failure;
1728                         }
1729                         nla_nest_end(msg, nested);
1730                 }
1731                 state->split_start++;
1732                 break;
1733         case 12:
1734                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1735                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1736                                rdev->wiphy.max_num_csa_counters))
1737                         goto nla_put_failure;
1738
1739                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1740                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1741                         goto nla_put_failure;
1742
1743                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1744                             sizeof(rdev->wiphy.ext_features),
1745                             rdev->wiphy.ext_features))
1746                         goto nla_put_failure;
1747
1748                 if (rdev->wiphy.bss_select_support) {
1749                         struct nlattr *nested;
1750                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1751
1752                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1753                         if (!nested)
1754                                 goto nla_put_failure;
1755
1756                         i = 0;
1757                         while (bss_select_support) {
1758                                 if ((bss_select_support & 1) &&
1759                                     nla_put_flag(msg, i))
1760                                         goto nla_put_failure;
1761                                 i++;
1762                                 bss_select_support >>= 1;
1763                         }
1764                         nla_nest_end(msg, nested);
1765                 }
1766
1767                 state->split_start++;
1768                 break;
1769         case 13:
1770                 if (rdev->wiphy.num_iftype_ext_capab &&
1771                     rdev->wiphy.iftype_ext_capab) {
1772                         struct nlattr *nested_ext_capab, *nested;
1773
1774                         nested = nla_nest_start(msg,
1775                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1776                         if (!nested)
1777                                 goto nla_put_failure;
1778
1779                         for (i = state->capa_start;
1780                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1781                                 const struct wiphy_iftype_ext_capab *capab;
1782
1783                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1784
1785                                 nested_ext_capab = nla_nest_start(msg, i);
1786                                 if (!nested_ext_capab ||
1787                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1788                                                 capab->iftype) ||
1789                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1790                                             capab->extended_capabilities_len,
1791                                             capab->extended_capabilities) ||
1792                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1793                                             capab->extended_capabilities_len,
1794                                             capab->extended_capabilities_mask))
1795                                         goto nla_put_failure;
1796
1797                                 nla_nest_end(msg, nested_ext_capab);
1798                                 if (state->split)
1799                                         break;
1800                         }
1801                         nla_nest_end(msg, nested);
1802                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1803                                 state->capa_start = i + 1;
1804                                 break;
1805                         }
1806                 }
1807
1808                 /* done */
1809                 state->split_start = 0;
1810                 break;
1811         }
1812  finish:
1813         genlmsg_end(msg, hdr);
1814         return 0;
1815
1816  nla_put_failure:
1817         genlmsg_cancel(msg, hdr);
1818         return -EMSGSIZE;
1819 }
1820
1821 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1822                                     struct netlink_callback *cb,
1823                                     struct nl80211_dump_wiphy_state *state)
1824 {
1825         struct nlattr **tb = nl80211_fam.attrbuf;
1826         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1827                               tb, nl80211_fam.maxattr, nl80211_policy);
1828         /* ignore parse errors for backward compatibility */
1829         if (ret)
1830                 return 0;
1831
1832         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1833         if (tb[NL80211_ATTR_WIPHY])
1834                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1835         if (tb[NL80211_ATTR_WDEV])
1836                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1837         if (tb[NL80211_ATTR_IFINDEX]) {
1838                 struct net_device *netdev;
1839                 struct cfg80211_registered_device *rdev;
1840                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1841
1842                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1843                 if (!netdev)
1844                         return -ENODEV;
1845                 if (netdev->ieee80211_ptr) {
1846                         rdev = wiphy_to_rdev(
1847                                 netdev->ieee80211_ptr->wiphy);
1848                         state->filter_wiphy = rdev->wiphy_idx;
1849                 }
1850         }
1851
1852         return 0;
1853 }
1854
1855 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1856 {
1857         int idx = 0, ret;
1858         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1859         struct cfg80211_registered_device *rdev;
1860
1861         rtnl_lock();
1862         if (!state) {
1863                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1864                 if (!state) {
1865                         rtnl_unlock();
1866                         return -ENOMEM;
1867                 }
1868                 state->filter_wiphy = -1;
1869                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1870                 if (ret) {
1871                         kfree(state);
1872                         rtnl_unlock();
1873                         return ret;
1874                 }
1875                 cb->args[0] = (long)state;
1876         }
1877
1878         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1879                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1880                         continue;
1881                 if (++idx <= state->start)
1882                         continue;
1883                 if (state->filter_wiphy != -1 &&
1884                     state->filter_wiphy != rdev->wiphy_idx)
1885                         continue;
1886                 /* attempt to fit multiple wiphy data chunks into the skb */
1887                 do {
1888                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1889                                                  skb,
1890                                                  NETLINK_CB(cb->skb).portid,
1891                                                  cb->nlh->nlmsg_seq,
1892                                                  NLM_F_MULTI, state);
1893                         if (ret < 0) {
1894                                 /*
1895                                  * If sending the wiphy data didn't fit (ENOBUFS
1896                                  * or EMSGSIZE returned), this SKB is still
1897                                  * empty (so it's not too big because another
1898                                  * wiphy dataset is already in the skb) and
1899                                  * we've not tried to adjust the dump allocation
1900                                  * yet ... then adjust the alloc size to be
1901                                  * bigger, and return 1 but with the empty skb.
1902                                  * This results in an empty message being RX'ed
1903                                  * in userspace, but that is ignored.
1904                                  *
1905                                  * We can then retry with the larger buffer.
1906                                  */
1907                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1908                                     !skb->len && !state->split &&
1909                                     cb->min_dump_alloc < 4096) {
1910                                         cb->min_dump_alloc = 4096;
1911                                         state->split_start = 0;
1912                                         rtnl_unlock();
1913                                         return 1;
1914                                 }
1915                                 idx--;
1916                                 break;
1917                         }
1918                 } while (state->split_start > 0);
1919                 break;
1920         }
1921         rtnl_unlock();
1922
1923         state->start = idx;
1924
1925         return skb->len;
1926 }
1927
1928 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1929 {
1930         kfree((void *)cb->args[0]);
1931         return 0;
1932 }
1933
1934 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1935 {
1936         struct sk_buff *msg;
1937         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1938         struct nl80211_dump_wiphy_state state = {};
1939
1940         msg = nlmsg_new(4096, GFP_KERNEL);
1941         if (!msg)
1942                 return -ENOMEM;
1943
1944         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1945                                info->snd_portid, info->snd_seq, 0,
1946                                &state) < 0) {
1947                 nlmsg_free(msg);
1948                 return -ENOBUFS;
1949         }
1950
1951         return genlmsg_reply(msg, info);
1952 }
1953
1954 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1955         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1956         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1957         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1958         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1959         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1960 };
1961
1962 static int parse_txq_params(struct nlattr *tb[],
1963                             struct ieee80211_txq_params *txq_params)
1964 {
1965         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1966             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1967             !tb[NL80211_TXQ_ATTR_AIFS])
1968                 return -EINVAL;
1969
1970         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1971         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1972         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1973         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1974         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1975
1976         if (txq_params->ac >= NL80211_NUM_ACS)
1977                 return -EINVAL;
1978
1979         return 0;
1980 }
1981
1982 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1983 {
1984         /*
1985          * You can only set the channel explicitly for WDS interfaces,
1986          * all others have their channel managed via their respective
1987          * "establish a connection" command (connect, join, ...)
1988          *
1989          * For AP/GO and mesh mode, the channel can be set with the
1990          * channel userspace API, but is only stored and passed to the
1991          * low-level driver when the AP starts or the mesh is joined.
1992          * This is for backward compatibility, userspace can also give
1993          * the channel in the start-ap or join-mesh commands instead.
1994          *
1995          * Monitors are special as they are normally slaved to
1996          * whatever else is going on, so they have their own special
1997          * operation to set the monitor channel if possible.
1998          */
1999         return !wdev ||
2000                 wdev->iftype == NL80211_IFTYPE_AP ||
2001                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2002                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2003                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2004 }
2005
2006 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2007                                  struct genl_info *info,
2008                                  struct cfg80211_chan_def *chandef)
2009 {
2010         u32 control_freq;
2011
2012         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2013                 return -EINVAL;
2014
2015         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2016
2017         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2018         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2019         chandef->center_freq1 = control_freq;
2020         chandef->center_freq2 = 0;
2021
2022         /* Primary channel not allowed */
2023         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2024                 return -EINVAL;
2025
2026         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2027                 enum nl80211_channel_type chantype;
2028
2029                 chantype = nla_get_u32(
2030                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2031
2032                 switch (chantype) {
2033                 case NL80211_CHAN_NO_HT:
2034                 case NL80211_CHAN_HT20:
2035                 case NL80211_CHAN_HT40PLUS:
2036                 case NL80211_CHAN_HT40MINUS:
2037                         cfg80211_chandef_create(chandef, chandef->chan,
2038                                                 chantype);
2039                         break;
2040                 default:
2041                         return -EINVAL;
2042                 }
2043         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2044                 chandef->width =
2045                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2046                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2047                         chandef->center_freq1 =
2048                                 nla_get_u32(
2049                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2050                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2051                         chandef->center_freq2 =
2052                                 nla_get_u32(
2053                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2054         }
2055
2056         if (!cfg80211_chandef_valid(chandef))
2057                 return -EINVAL;
2058
2059         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2060                                      IEEE80211_CHAN_DISABLED))
2061                 return -EINVAL;
2062
2063         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2064              chandef->width == NL80211_CHAN_WIDTH_10) &&
2065             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2066                 return -EINVAL;
2067
2068         return 0;
2069 }
2070
2071 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2072                                  struct net_device *dev,
2073                                  struct genl_info *info)
2074 {
2075         struct cfg80211_chan_def chandef;
2076         int result;
2077         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2078         struct wireless_dev *wdev = NULL;
2079
2080         if (dev)
2081                 wdev = dev->ieee80211_ptr;
2082         if (!nl80211_can_set_dev_channel(wdev))
2083                 return -EOPNOTSUPP;
2084         if (wdev)
2085                 iftype = wdev->iftype;
2086
2087         result = nl80211_parse_chandef(rdev, info, &chandef);
2088         if (result)
2089                 return result;
2090
2091         switch (iftype) {
2092         case NL80211_IFTYPE_AP:
2093         case NL80211_IFTYPE_P2P_GO:
2094                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2095                                                    iftype)) {
2096                         result = -EINVAL;
2097                         break;
2098                 }
2099                 if (wdev->beacon_interval) {
2100                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2101                             !(rdev->wiphy.features &
2102                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2103                                 result = -EBUSY;
2104                                 break;
2105                         }
2106
2107                         /* Only allow dynamic channel width changes */
2108                         if (chandef.chan != wdev->preset_chandef.chan) {
2109                                 result = -EBUSY;
2110                                 break;
2111                         }
2112                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2113                         if (result)
2114                                 break;
2115                 }
2116                 wdev->preset_chandef = chandef;
2117                 result = 0;
2118                 break;
2119         case NL80211_IFTYPE_MESH_POINT:
2120                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2121                 break;
2122         case NL80211_IFTYPE_MONITOR:
2123                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2124                 break;
2125         default:
2126                 result = -EINVAL;
2127         }
2128
2129         return result;
2130 }
2131
2132 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2133 {
2134         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2135         struct net_device *netdev = info->user_ptr[1];
2136
2137         return __nl80211_set_channel(rdev, netdev, info);
2138 }
2139
2140 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2141 {
2142         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2143         struct net_device *dev = info->user_ptr[1];
2144         struct wireless_dev *wdev = dev->ieee80211_ptr;
2145         const u8 *bssid;
2146
2147         if (!info->attrs[NL80211_ATTR_MAC])
2148                 return -EINVAL;
2149
2150         if (netif_running(dev))
2151                 return -EBUSY;
2152
2153         if (!rdev->ops->set_wds_peer)
2154                 return -EOPNOTSUPP;
2155
2156         if (wdev->iftype != NL80211_IFTYPE_WDS)
2157                 return -EOPNOTSUPP;
2158
2159         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2160         return rdev_set_wds_peer(rdev, dev, bssid);
2161 }
2162
2163 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2164 {
2165         struct cfg80211_registered_device *rdev;
2166         struct net_device *netdev = NULL;
2167         struct wireless_dev *wdev;
2168         int result = 0, rem_txq_params = 0;
2169         struct nlattr *nl_txq_params;
2170         u32 changed;
2171         u8 retry_short = 0, retry_long = 0;
2172         u32 frag_threshold = 0, rts_threshold = 0;
2173         u8 coverage_class = 0;
2174
2175         ASSERT_RTNL();
2176
2177         /*
2178          * Try to find the wiphy and netdev. Normally this
2179          * function shouldn't need the netdev, but this is
2180          * done for backward compatibility -- previously
2181          * setting the channel was done per wiphy, but now
2182          * it is per netdev. Previous userland like hostapd
2183          * also passed a netdev to set_wiphy, so that it is
2184          * possible to let that go to the right netdev!
2185          */
2186
2187         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2188                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2189
2190                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2191                 if (netdev && netdev->ieee80211_ptr)
2192                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2193                 else
2194                         netdev = NULL;
2195         }
2196
2197         if (!netdev) {
2198                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2199                                                   info->attrs);
2200                 if (IS_ERR(rdev))
2201                         return PTR_ERR(rdev);
2202                 wdev = NULL;
2203                 netdev = NULL;
2204                 result = 0;
2205         } else
2206                 wdev = netdev->ieee80211_ptr;
2207
2208         /*
2209          * end workaround code, by now the rdev is available
2210          * and locked, and wdev may or may not be NULL.
2211          */
2212
2213         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2214                 result = cfg80211_dev_rename(
2215                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2216
2217         if (result)
2218                 return result;
2219
2220         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2221                 struct ieee80211_txq_params txq_params;
2222                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2223
2224                 if (!rdev->ops->set_txq_params)
2225                         return -EOPNOTSUPP;
2226
2227                 if (!netdev)
2228                         return -EINVAL;
2229
2230                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2231                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2232                         return -EINVAL;
2233
2234                 if (!netif_running(netdev))
2235                         return -ENETDOWN;
2236
2237                 nla_for_each_nested(nl_txq_params,
2238                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2239                                     rem_txq_params) {
2240                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2241                                            nla_data(nl_txq_params),
2242                                            nla_len(nl_txq_params),
2243                                            txq_params_policy);
2244                         if (result)
2245                                 return result;
2246                         result = parse_txq_params(tb, &txq_params);
2247                         if (result)
2248                                 return result;
2249
2250                         result = rdev_set_txq_params(rdev, netdev,
2251                                                      &txq_params);
2252                         if (result)
2253                                 return result;
2254                 }
2255         }
2256
2257         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2258                 result = __nl80211_set_channel(
2259                         rdev,
2260                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2261                         info);
2262                 if (result)
2263                         return result;
2264         }
2265
2266         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2267                 struct wireless_dev *txp_wdev = wdev;
2268                 enum nl80211_tx_power_setting type;
2269                 int idx, mbm = 0;
2270
2271                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2272                         txp_wdev = NULL;
2273
2274                 if (!rdev->ops->set_tx_power)
2275                         return -EOPNOTSUPP;
2276
2277                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2278                 type = nla_get_u32(info->attrs[idx]);
2279
2280                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2281                     (type != NL80211_TX_POWER_AUTOMATIC))
2282                         return -EINVAL;
2283
2284                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2285                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2286                         mbm = nla_get_u32(info->attrs[idx]);
2287                 }
2288
2289                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2290                 if (result)
2291                         return result;
2292         }
2293
2294         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2295             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2296                 u32 tx_ant, rx_ant;
2297
2298                 if ((!rdev->wiphy.available_antennas_tx &&
2299                      !rdev->wiphy.available_antennas_rx) ||
2300                     !rdev->ops->set_antenna)
2301                         return -EOPNOTSUPP;
2302
2303                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2304                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2305
2306                 /* reject antenna configurations which don't match the
2307                  * available antenna masks, except for the "all" mask */
2308                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2309                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2310                         return -EINVAL;
2311
2312                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2313                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2314
2315                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2316                 if (result)
2317                         return result;
2318         }
2319
2320         changed = 0;
2321
2322         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2323                 retry_short = nla_get_u8(
2324                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2325                 if (retry_short == 0)
2326                         return -EINVAL;
2327
2328                 changed |= WIPHY_PARAM_RETRY_SHORT;
2329         }
2330
2331         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2332                 retry_long = nla_get_u8(
2333                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2334                 if (retry_long == 0)
2335                         return -EINVAL;
2336
2337                 changed |= WIPHY_PARAM_RETRY_LONG;
2338         }
2339
2340         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2341                 frag_threshold = nla_get_u32(
2342                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2343                 if (frag_threshold < 256)
2344                         return -EINVAL;
2345
2346                 if (frag_threshold != (u32) -1) {
2347                         /*
2348                          * Fragments (apart from the last one) are required to
2349                          * have even length. Make the fragmentation code
2350                          * simpler by stripping LSB should someone try to use
2351                          * odd threshold value.
2352                          */
2353                         frag_threshold &= ~0x1;
2354                 }
2355                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2356         }
2357
2358         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2359                 rts_threshold = nla_get_u32(
2360                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2361                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2362         }
2363
2364         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2365                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2366                         return -EINVAL;
2367
2368                 coverage_class = nla_get_u8(
2369                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2370                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2371         }
2372
2373         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2374                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2375                         return -EOPNOTSUPP;
2376
2377                 changed |= WIPHY_PARAM_DYN_ACK;
2378         }
2379
2380         if (changed) {
2381                 u8 old_retry_short, old_retry_long;
2382                 u32 old_frag_threshold, old_rts_threshold;
2383                 u8 old_coverage_class;
2384
2385                 if (!rdev->ops->set_wiphy_params)
2386                         return -EOPNOTSUPP;
2387
2388                 old_retry_short = rdev->wiphy.retry_short;
2389                 old_retry_long = rdev->wiphy.retry_long;
2390                 old_frag_threshold = rdev->wiphy.frag_threshold;
2391                 old_rts_threshold = rdev->wiphy.rts_threshold;
2392                 old_coverage_class = rdev->wiphy.coverage_class;
2393
2394                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2395                         rdev->wiphy.retry_short = retry_short;
2396                 if (changed & WIPHY_PARAM_RETRY_LONG)
2397                         rdev->wiphy.retry_long = retry_long;
2398                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2399                         rdev->wiphy.frag_threshold = frag_threshold;
2400                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2401                         rdev->wiphy.rts_threshold = rts_threshold;
2402                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2403                         rdev->wiphy.coverage_class = coverage_class;
2404
2405                 result = rdev_set_wiphy_params(rdev, changed);
2406                 if (result) {
2407                         rdev->wiphy.retry_short = old_retry_short;
2408                         rdev->wiphy.retry_long = old_retry_long;
2409                         rdev->wiphy.frag_threshold = old_frag_threshold;
2410                         rdev->wiphy.rts_threshold = old_rts_threshold;
2411                         rdev->wiphy.coverage_class = old_coverage_class;
2412                         return result;
2413                 }
2414         }
2415         return 0;
2416 }
2417
2418 static inline u64 wdev_id(struct wireless_dev *wdev)
2419 {
2420         return (u64)wdev->identifier |
2421                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2422 }
2423
2424 static int nl80211_send_chandef(struct sk_buff *msg,
2425                                 const struct cfg80211_chan_def *chandef)
2426 {
2427         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2428                 return -EINVAL;
2429
2430         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2431                         chandef->chan->center_freq))
2432                 return -ENOBUFS;
2433         switch (chandef->width) {
2434         case NL80211_CHAN_WIDTH_20_NOHT:
2435         case NL80211_CHAN_WIDTH_20:
2436         case NL80211_CHAN_WIDTH_40:
2437                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2438                                 cfg80211_get_chandef_type(chandef)))
2439                         return -ENOBUFS;
2440                 break;
2441         default:
2442                 break;
2443         }
2444         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2445                 return -ENOBUFS;
2446         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2447                 return -ENOBUFS;
2448         if (chandef->center_freq2 &&
2449             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2450                 return -ENOBUFS;
2451         return 0;
2452 }
2453
2454 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2455                               struct cfg80211_registered_device *rdev,
2456                               struct wireless_dev *wdev, bool removal)
2457 {
2458         struct net_device *dev = wdev->netdev;
2459         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2460         void *hdr;
2461
2462         if (removal)
2463                 cmd = NL80211_CMD_DEL_INTERFACE;
2464
2465         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2466         if (!hdr)
2467                 return -1;
2468
2469         if (dev &&
2470             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2471              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2472                 goto nla_put_failure;
2473
2474         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2475             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2476             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2477                               NL80211_ATTR_PAD) ||
2478             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2479             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2480                         rdev->devlist_generation ^
2481                         (cfg80211_rdev_list_generation << 2)))
2482                 goto nla_put_failure;
2483
2484         if (rdev->ops->get_channel) {
2485                 int ret;
2486                 struct cfg80211_chan_def chandef;
2487
2488                 ret = rdev_get_channel(rdev, wdev, &chandef);
2489                 if (ret == 0) {
2490                         if (nl80211_send_chandef(msg, &chandef))
2491                                 goto nla_put_failure;
2492                 }
2493         }
2494
2495         if (rdev->ops->get_tx_power) {
2496                 int dbm, ret;
2497
2498                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2499                 if (ret == 0 &&
2500                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2501                                 DBM_TO_MBM(dbm)))
2502                         goto nla_put_failure;
2503         }
2504
2505         if (wdev->ssid_len) {
2506                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2507                         goto nla_put_failure;
2508         }
2509
2510         genlmsg_end(msg, hdr);
2511         return 0;
2512
2513  nla_put_failure:
2514         genlmsg_cancel(msg, hdr);
2515         return -EMSGSIZE;
2516 }
2517
2518 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2519 {
2520         int wp_idx = 0;
2521         int if_idx = 0;
2522         int wp_start = cb->args[0];
2523         int if_start = cb->args[1];
2524         struct cfg80211_registered_device *rdev;
2525         struct wireless_dev *wdev;
2526
2527         rtnl_lock();
2528         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2529                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2530                         continue;
2531                 if (wp_idx < wp_start) {
2532                         wp_idx++;
2533                         continue;
2534                 }
2535                 if_idx = 0;
2536
2537                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2538                         if (if_idx < if_start) {
2539                                 if_idx++;
2540                                 continue;
2541                         }
2542                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2543                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2544                                                rdev, wdev, false) < 0) {
2545                                 goto out;
2546                         }
2547                         if_idx++;
2548                 }
2549
2550                 wp_idx++;
2551         }
2552  out:
2553         rtnl_unlock();
2554
2555         cb->args[0] = wp_idx;
2556         cb->args[1] = if_idx;
2557
2558         return skb->len;
2559 }
2560
2561 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2562 {
2563         struct sk_buff *msg;
2564         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2565         struct wireless_dev *wdev = info->user_ptr[1];
2566
2567         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2568         if (!msg)
2569                 return -ENOMEM;
2570
2571         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2572                                rdev, wdev, false) < 0) {
2573                 nlmsg_free(msg);
2574                 return -ENOBUFS;
2575         }
2576
2577         return genlmsg_reply(msg, info);
2578 }
2579
2580 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2581         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2582         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2583         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2584         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2585         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2586         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2587 };
2588
2589 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2590 {
2591         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2592         int flag;
2593
2594         *mntrflags = 0;
2595
2596         if (!nla)
2597                 return -EINVAL;
2598
2599         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2600                              nla, mntr_flags_policy))
2601                 return -EINVAL;
2602
2603         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2604                 if (flags[flag])
2605                         *mntrflags |= (1<<flag);
2606
2607         return 0;
2608 }
2609
2610 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2611                                struct net_device *netdev, u8 use_4addr,
2612                                enum nl80211_iftype iftype)
2613 {
2614         if (!use_4addr) {
2615                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2616                         return -EBUSY;
2617                 return 0;
2618         }
2619
2620         switch (iftype) {
2621         case NL80211_IFTYPE_AP_VLAN:
2622                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2623                         return 0;
2624                 break;
2625         case NL80211_IFTYPE_STATION:
2626                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2627                         return 0;
2628                 break;
2629         default:
2630                 break;
2631         }
2632
2633         return -EOPNOTSUPP;
2634 }
2635
2636 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2637 {
2638         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2639         struct vif_params params;
2640         int err;
2641         enum nl80211_iftype otype, ntype;
2642         struct net_device *dev = info->user_ptr[1];
2643         u32 _flags, *flags = NULL;
2644         bool change = false;
2645
2646         memset(&params, 0, sizeof(params));
2647
2648         otype = ntype = dev->ieee80211_ptr->iftype;
2649
2650         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2651                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2652                 if (otype != ntype)
2653                         change = true;
2654                 if (ntype > NL80211_IFTYPE_MAX)
2655                         return -EINVAL;
2656         }
2657
2658         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2659                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2660
2661                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2662                         return -EINVAL;
2663                 if (netif_running(dev))
2664                         return -EBUSY;
2665
2666                 wdev_lock(wdev);
2667                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2668                              IEEE80211_MAX_MESH_ID_LEN);
2669                 wdev->mesh_id_up_len =
2670                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2671                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2672                        wdev->mesh_id_up_len);
2673                 wdev_unlock(wdev);
2674         }
2675
2676         if (info->attrs[NL80211_ATTR_4ADDR]) {
2677                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2678                 change = true;
2679                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2680                 if (err)
2681                         return err;
2682         } else {
2683                 params.use_4addr = -1;
2684         }
2685
2686         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2687                 if (ntype != NL80211_IFTYPE_MONITOR)
2688                         return -EINVAL;
2689                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2690                                           &_flags);
2691                 if (err)
2692                         return err;
2693
2694                 flags = &_flags;
2695                 change = true;
2696         }
2697
2698         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2699             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2700                 return -EOPNOTSUPP;
2701
2702         if (change)
2703                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2704         else
2705                 err = 0;
2706
2707         if (!err && params.use_4addr != -1)
2708                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2709
2710         return err;
2711 }
2712
2713 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2714 {
2715         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2716         struct vif_params params;
2717         struct wireless_dev *wdev;
2718         struct sk_buff *msg, *event;
2719         int err;
2720         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2721         u32 flags;
2722
2723         /* to avoid failing a new interface creation due to pending removal */
2724         cfg80211_destroy_ifaces(rdev);
2725
2726         memset(&params, 0, sizeof(params));
2727
2728         if (!info->attrs[NL80211_ATTR_IFNAME])
2729                 return -EINVAL;
2730
2731         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2732                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2733                 if (type > NL80211_IFTYPE_MAX)
2734                         return -EINVAL;
2735         }
2736
2737         if (!rdev->ops->add_virtual_intf ||
2738             !(rdev->wiphy.interface_modes & (1 << type)))
2739                 return -EOPNOTSUPP;
2740
2741         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2742              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2743             info->attrs[NL80211_ATTR_MAC]) {
2744                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2745                            ETH_ALEN);
2746                 if (!is_valid_ether_addr(params.macaddr))
2747                         return -EADDRNOTAVAIL;
2748         }
2749
2750         if (info->attrs[NL80211_ATTR_4ADDR]) {
2751                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2752                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2753                 if (err)
2754                         return err;
2755         }
2756
2757         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2758                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2759                                   &flags);
2760
2761         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2762             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2763                 return -EOPNOTSUPP;
2764
2765         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2766         if (!msg)
2767                 return -ENOMEM;
2768
2769         wdev = rdev_add_virtual_intf(rdev,
2770                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2771                                 NET_NAME_USER, type, err ? NULL : &flags,
2772                                 &params);
2773         if (WARN_ON(!wdev)) {
2774                 nlmsg_free(msg);
2775                 return -EPROTO;
2776         } else if (IS_ERR(wdev)) {
2777                 nlmsg_free(msg);
2778                 return PTR_ERR(wdev);
2779         }
2780
2781         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2782                 wdev->owner_nlportid = info->snd_portid;
2783
2784         switch (type) {
2785         case NL80211_IFTYPE_MESH_POINT:
2786                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2787                         break;
2788                 wdev_lock(wdev);
2789                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2790                              IEEE80211_MAX_MESH_ID_LEN);
2791                 wdev->mesh_id_up_len =
2792                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2793                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2794                        wdev->mesh_id_up_len);
2795                 wdev_unlock(wdev);
2796                 break;
2797         case NL80211_IFTYPE_P2P_DEVICE:
2798                 /*
2799                  * P2P Device doesn't have a netdev, so doesn't go
2800                  * through the netdev notifier and must be added here
2801                  */
2802                 mutex_init(&wdev->mtx);
2803                 INIT_LIST_HEAD(&wdev->event_list);
2804                 spin_lock_init(&wdev->event_lock);
2805                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2806                 spin_lock_init(&wdev->mgmt_registrations_lock);
2807
2808                 wdev->identifier = ++rdev->wdev_id;
2809                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2810                 rdev->devlist_generation++;
2811                 break;
2812         default:
2813                 break;
2814         }
2815
2816         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2817                                rdev, wdev, false) < 0) {
2818                 nlmsg_free(msg);
2819                 return -ENOBUFS;
2820         }
2821
2822         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2823         if (event) {
2824                 if (nl80211_send_iface(event, 0, 0, 0,
2825                                        rdev, wdev, false) < 0) {
2826                         nlmsg_free(event);
2827                         goto out;
2828                 }
2829
2830                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2831                                         event, 0, NL80211_MCGRP_CONFIG,
2832                                         GFP_KERNEL);
2833         }
2834
2835 out:
2836         return genlmsg_reply(msg, info);
2837 }
2838
2839 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2840 {
2841         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2842         struct wireless_dev *wdev = info->user_ptr[1];
2843         struct sk_buff *msg;
2844         int status;
2845
2846         if (!rdev->ops->del_virtual_intf)
2847                 return -EOPNOTSUPP;
2848
2849         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2850         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2851                 nlmsg_free(msg);
2852                 msg = NULL;
2853         }
2854
2855         /*
2856          * If we remove a wireless device without a netdev then clear
2857          * user_ptr[1] so that nl80211_post_doit won't dereference it
2858          * to check if it needs to do dev_put(). Otherwise it crashes
2859          * since the wdev has been freed, unlike with a netdev where
2860          * we need the dev_put() for the netdev to really be freed.
2861          */
2862         if (!wdev->netdev)
2863                 info->user_ptr[1] = NULL;
2864
2865         status = rdev_del_virtual_intf(rdev, wdev);
2866         if (status >= 0 && msg)
2867                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2868                                         msg, 0, NL80211_MCGRP_CONFIG,
2869                                         GFP_KERNEL);
2870         else
2871                 nlmsg_free(msg);
2872
2873         return status;
2874 }
2875
2876 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2877 {
2878         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2879         struct net_device *dev = info->user_ptr[1];
2880         u16 noack_map;
2881
2882         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2883                 return -EINVAL;
2884
2885         if (!rdev->ops->set_noack_map)
2886                 return -EOPNOTSUPP;
2887
2888         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2889
2890         return rdev_set_noack_map(rdev, dev, noack_map);
2891 }
2892
2893 struct get_key_cookie {
2894         struct sk_buff *msg;
2895         int error;
2896         int idx;
2897 };
2898
2899 static void get_key_callback(void *c, struct key_params *params)
2900 {
2901         struct nlattr *key;
2902         struct get_key_cookie *cookie = c;
2903
2904         if ((params->key &&
2905              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2906                      params->key_len, params->key)) ||
2907             (params->seq &&
2908              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2909                      params->seq_len, params->seq)) ||
2910             (params->cipher &&
2911              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2912                          params->cipher)))
2913                 goto nla_put_failure;
2914
2915         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2916         if (!key)
2917                 goto nla_put_failure;
2918
2919         if ((params->key &&
2920              nla_put(cookie->msg, NL80211_KEY_DATA,
2921                      params->key_len, params->key)) ||
2922             (params->seq &&
2923              nla_put(cookie->msg, NL80211_KEY_SEQ,
2924                      params->seq_len, params->seq)) ||
2925             (params->cipher &&
2926              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2927                          params->cipher)))
2928                 goto nla_put_failure;
2929
2930         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2931                 goto nla_put_failure;
2932
2933         nla_nest_end(cookie->msg, key);
2934
2935         return;
2936  nla_put_failure:
2937         cookie->error = 1;
2938 }
2939
2940 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2941 {
2942         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2943         int err;
2944         struct net_device *dev = info->user_ptr[1];
2945         u8 key_idx = 0;
2946         const u8 *mac_addr = NULL;
2947         bool pairwise;
2948         struct get_key_cookie cookie = {
2949                 .error = 0,
2950         };
2951         void *hdr;
2952         struct sk_buff *msg;
2953
2954         if (info->attrs[NL80211_ATTR_KEY_IDX])
2955                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2956
2957         if (key_idx > 5)
2958                 return -EINVAL;
2959
2960         if (info->attrs[NL80211_ATTR_MAC])
2961                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2962
2963         pairwise = !!mac_addr;
2964         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2965                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2966
2967                 if (kt >= NUM_NL80211_KEYTYPES)
2968                         return -EINVAL;
2969                 if (kt != NL80211_KEYTYPE_GROUP &&
2970                     kt != NL80211_KEYTYPE_PAIRWISE)
2971                         return -EINVAL;
2972                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2973         }
2974
2975         if (!rdev->ops->get_key)
2976                 return -EOPNOTSUPP;
2977
2978         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2979                 return -ENOENT;
2980
2981         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2982         if (!msg)
2983                 return -ENOMEM;
2984
2985         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2986                              NL80211_CMD_NEW_KEY);
2987         if (!hdr)
2988                 goto nla_put_failure;
2989
2990         cookie.msg = msg;
2991         cookie.idx = key_idx;
2992
2993         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2994             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2995                 goto nla_put_failure;
2996         if (mac_addr &&
2997             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2998                 goto nla_put_failure;
2999
3000         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3001                            get_key_callback);
3002
3003         if (err)
3004                 goto free_msg;
3005
3006         if (cookie.error)
3007                 goto nla_put_failure;
3008
3009         genlmsg_end(msg, hdr);
3010         return genlmsg_reply(msg, info);
3011
3012  nla_put_failure:
3013         err = -ENOBUFS;
3014  free_msg:
3015         nlmsg_free(msg);
3016         return err;
3017 }
3018
3019 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3020 {
3021         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3022         struct key_parse key;
3023         int err;
3024         struct net_device *dev = info->user_ptr[1];
3025
3026         err = nl80211_parse_key(info, &key);
3027         if (err)
3028                 return err;
3029
3030         if (key.idx < 0)
3031                 return -EINVAL;
3032
3033         /* only support setting default key */
3034         if (!key.def && !key.defmgmt)
3035                 return -EINVAL;
3036
3037         wdev_lock(dev->ieee80211_ptr);
3038
3039         if (key.def) {
3040                 if (!rdev->ops->set_default_key) {
3041                         err = -EOPNOTSUPP;
3042                         goto out;
3043                 }
3044
3045                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3046                 if (err)
3047                         goto out;
3048
3049                 err = rdev_set_default_key(rdev, dev, key.idx,
3050                                                  key.def_uni, key.def_multi);
3051
3052                 if (err)
3053                         goto out;
3054
3055 #ifdef CONFIG_CFG80211_WEXT
3056                 dev->ieee80211_ptr->wext.default_key = key.idx;
3057 #endif
3058         } else {
3059                 if (key.def_uni || !key.def_multi) {
3060                         err = -EINVAL;
3061                         goto out;
3062                 }
3063
3064                 if (!rdev->ops->set_default_mgmt_key) {
3065                         err = -EOPNOTSUPP;
3066                         goto out;
3067                 }
3068
3069                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3070                 if (err)
3071                         goto out;
3072
3073                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3074                 if (err)
3075                         goto out;
3076
3077 #ifdef CONFIG_CFG80211_WEXT
3078                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3079 #endif
3080         }
3081
3082  out:
3083         wdev_unlock(dev->ieee80211_ptr);
3084
3085         return err;
3086 }
3087
3088 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3089 {
3090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3091         int err;
3092         struct net_device *dev = info->user_ptr[1];
3093         struct key_parse key;
3094         const u8 *mac_addr = NULL;
3095
3096         err = nl80211_parse_key(info, &key);
3097         if (err)
3098                 return err;
3099
3100         if (!key.p.key)
3101                 return -EINVAL;
3102
3103         if (info->attrs[NL80211_ATTR_MAC])
3104                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3105
3106         if (key.type == -1) {
3107                 if (mac_addr)
3108                         key.type = NL80211_KEYTYPE_PAIRWISE;
3109                 else
3110                         key.type = NL80211_KEYTYPE_GROUP;
3111         }
3112
3113         /* for now */
3114         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3115             key.type != NL80211_KEYTYPE_GROUP)
3116                 return -EINVAL;
3117
3118         if (!rdev->ops->add_key)
3119                 return -EOPNOTSUPP;
3120
3121         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3122                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3123                                            mac_addr))
3124                 return -EINVAL;
3125
3126         wdev_lock(dev->ieee80211_ptr);
3127         err = nl80211_key_allowed(dev->ieee80211_ptr);
3128         if (!err)
3129                 err = rdev_add_key(rdev, dev, key.idx,
3130                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3131                                     mac_addr, &key.p);
3132         wdev_unlock(dev->ieee80211_ptr);
3133
3134         return err;
3135 }
3136
3137 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3138 {
3139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3140         int err;
3141         struct net_device *dev = info->user_ptr[1];
3142         u8 *mac_addr = NULL;
3143         struct key_parse key;
3144
3145         err = nl80211_parse_key(info, &key);
3146         if (err)
3147                 return err;
3148
3149         if (info->attrs[NL80211_ATTR_MAC])
3150                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3151
3152         if (key.type == -1) {
3153                 if (mac_addr)
3154                         key.type = NL80211_KEYTYPE_PAIRWISE;
3155                 else
3156                         key.type = NL80211_KEYTYPE_GROUP;
3157         }
3158
3159         /* for now */
3160         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3161             key.type != NL80211_KEYTYPE_GROUP)
3162                 return -EINVAL;
3163
3164         if (!rdev->ops->del_key)
3165                 return -EOPNOTSUPP;
3166
3167         wdev_lock(dev->ieee80211_ptr);
3168         err = nl80211_key_allowed(dev->ieee80211_ptr);
3169
3170         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3171             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3172                 err = -ENOENT;
3173
3174         if (!err)
3175                 err = rdev_del_key(rdev, dev, key.idx,
3176                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3177                                    mac_addr);
3178
3179 #ifdef CONFIG_CFG80211_WEXT
3180         if (!err) {
3181                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3182                         dev->ieee80211_ptr->wext.default_key = -1;
3183                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3184                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3185         }
3186 #endif
3187         wdev_unlock(dev->ieee80211_ptr);
3188
3189         return err;
3190 }
3191
3192 /* This function returns an error or the number of nested attributes */
3193 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3194 {
3195         struct nlattr *attr;
3196         int n_entries = 0, tmp;
3197
3198         nla_for_each_nested(attr, nl_attr, tmp) {
3199                 if (nla_len(attr) != ETH_ALEN)
3200                         return -EINVAL;
3201
3202                 n_entries++;
3203         }
3204
3205         return n_entries;
3206 }
3207
3208 /*
3209  * This function parses ACL information and allocates memory for ACL data.
3210  * On successful return, the calling function is responsible to free the
3211  * ACL buffer returned by this function.
3212  */
3213 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3214                                                 struct genl_info *info)
3215 {
3216         enum nl80211_acl_policy acl_policy;
3217         struct nlattr *attr;
3218         struct cfg80211_acl_data *acl;
3219         int i = 0, n_entries, tmp;
3220
3221         if (!wiphy->max_acl_mac_addrs)
3222                 return ERR_PTR(-EOPNOTSUPP);
3223
3224         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3225                 return ERR_PTR(-EINVAL);
3226
3227         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3228         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3229             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3230                 return ERR_PTR(-EINVAL);
3231
3232         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3233                 return ERR_PTR(-EINVAL);
3234
3235         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3236         if (n_entries < 0)
3237                 return ERR_PTR(n_entries);
3238
3239         if (n_entries > wiphy->max_acl_mac_addrs)
3240                 return ERR_PTR(-ENOTSUPP);
3241
3242         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3243                       GFP_KERNEL);
3244         if (!acl)
3245                 return ERR_PTR(-ENOMEM);
3246
3247         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3248                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3249                 i++;
3250         }
3251
3252         acl->n_acl_entries = n_entries;
3253         acl->acl_policy = acl_policy;
3254
3255         return acl;
3256 }
3257
3258 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3259 {
3260         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3261         struct net_device *dev = info->user_ptr[1];
3262         struct cfg80211_acl_data *acl;
3263         int err;
3264
3265         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3266             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3267                 return -EOPNOTSUPP;
3268
3269         if (!dev->ieee80211_ptr->beacon_interval)
3270                 return -EINVAL;
3271
3272         acl = parse_acl_data(&rdev->wiphy, info);
3273         if (IS_ERR(acl))
3274                 return PTR_ERR(acl);
3275
3276         err = rdev_set_mac_acl(rdev, dev, acl);
3277
3278         kfree(acl);
3279
3280         return err;
3281 }
3282
3283 static int nl80211_parse_beacon(struct nlattr *attrs[],
3284                                 struct cfg80211_beacon_data *bcn)
3285 {
3286         bool haveinfo = false;
3287
3288         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3289             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3290             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3291             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3292                 return -EINVAL;
3293
3294         memset(bcn, 0, sizeof(*bcn));
3295
3296         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3297                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3298                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3299                 if (!bcn->head_len)
3300                         return -EINVAL;
3301                 haveinfo = true;
3302         }
3303
3304         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3305                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3306                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3307                 haveinfo = true;
3308         }
3309
3310         if (!haveinfo)
3311                 return -EINVAL;
3312
3313         if (attrs[NL80211_ATTR_IE]) {
3314                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3315                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3316         }
3317
3318         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3319                 bcn->proberesp_ies =
3320                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3321                 bcn->proberesp_ies_len =
3322                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3323         }
3324
3325         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3326                 bcn->assocresp_ies =
3327                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3328                 bcn->assocresp_ies_len =
3329                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3330         }
3331
3332         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3333                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3334                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3335         }
3336
3337         return 0;
3338 }
3339
3340 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3341                                    struct cfg80211_ap_settings *params)
3342 {
3343         struct wireless_dev *wdev;
3344         bool ret = false;
3345
3346         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3347                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3348                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3349                         continue;
3350
3351                 if (!wdev->preset_chandef.chan)
3352                         continue;
3353
3354                 params->chandef = wdev->preset_chandef;
3355                 ret = true;
3356                 break;
3357         }
3358
3359         return ret;
3360 }
3361
3362 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3363                                     enum nl80211_auth_type auth_type,
3364                                     enum nl80211_commands cmd)
3365 {
3366         if (auth_type > NL80211_AUTHTYPE_MAX)
3367                 return false;
3368
3369         switch (cmd) {
3370         case NL80211_CMD_AUTHENTICATE:
3371                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3372                     auth_type == NL80211_AUTHTYPE_SAE)
3373                         return false;
3374                 return true;
3375         case NL80211_CMD_CONNECT:
3376         case NL80211_CMD_START_AP:
3377                 /* SAE not supported yet */
3378                 if (auth_type == NL80211_AUTHTYPE_SAE)
3379                         return false;
3380                 return true;
3381         default:
3382                 return false;
3383         }
3384 }
3385
3386 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3387 {
3388         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3389         struct net_device *dev = info->user_ptr[1];
3390         struct wireless_dev *wdev = dev->ieee80211_ptr;
3391         struct cfg80211_ap_settings params;
3392         int err;
3393
3394         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3395             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3396                 return -EOPNOTSUPP;
3397
3398         if (!rdev->ops->start_ap)
3399                 return -EOPNOTSUPP;
3400
3401         if (wdev->beacon_interval)
3402                 return -EALREADY;
3403
3404         memset(&params, 0, sizeof(params));
3405
3406         /* these are required for START_AP */
3407         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3408             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3409             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3410                 return -EINVAL;
3411
3412         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3413         if (err)
3414                 return err;
3415
3416         params.beacon_interval =
3417                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3418         params.dtim_period =
3419                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3420
3421         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3422         if (err)
3423                 return err;
3424
3425         /*
3426          * In theory, some of these attributes should be required here
3427          * but since they were not used when the command was originally
3428          * added, keep them optional for old user space programs to let
3429          * them continue to work with drivers that do not need the
3430          * additional information -- drivers must check!
3431          */
3432         if (info->attrs[NL80211_ATTR_SSID]) {
3433                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3434                 params.ssid_len =
3435                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3436                 if (params.ssid_len == 0 ||
3437                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3438                         return -EINVAL;
3439         }
3440
3441         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3442                 params.hidden_ssid = nla_get_u32(
3443                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3444                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3445                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3446                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3447                         return -EINVAL;
3448         }
3449
3450         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3451
3452         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3453                 params.auth_type = nla_get_u32(
3454                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3455                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3456                                              NL80211_CMD_START_AP))
3457                         return -EINVAL;
3458         } else
3459                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3460
3461         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3462                                       NL80211_MAX_NR_CIPHER_SUITES);
3463         if (err)
3464                 return err;
3465
3466         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3467                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3468                         return -EOPNOTSUPP;
3469                 params.inactivity_timeout = nla_get_u16(
3470                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3471         }
3472
3473         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3474                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3475                         return -EINVAL;
3476                 params.p2p_ctwindow =
3477                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3478                 if (params.p2p_ctwindow > 127)
3479                         return -EINVAL;
3480                 if (params.p2p_ctwindow != 0 &&
3481                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3482                         return -EINVAL;
3483         }
3484
3485         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3486                 u8 tmp;
3487
3488                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3489                         return -EINVAL;
3490                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3491                 if (tmp > 1)
3492                         return -EINVAL;
3493                 params.p2p_opp_ps = tmp;
3494                 if (params.p2p_opp_ps != 0 &&
3495                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3496                         return -EINVAL;
3497         }
3498
3499         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3500                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3501                 if (err)
3502                         return err;
3503         } else if (wdev->preset_chandef.chan) {
3504                 params.chandef = wdev->preset_chandef;
3505         } else if (!nl80211_get_ap_channel(rdev, &params))
3506                 return -EINVAL;
3507
3508         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3509                                            wdev->iftype))
3510                 return -EINVAL;
3511
3512         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3513                 params.smps_mode =
3514                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3515                 switch (params.smps_mode) {
3516                 case NL80211_SMPS_OFF:
3517                         break;
3518                 case NL80211_SMPS_STATIC:
3519                         if (!(rdev->wiphy.features &
3520                               NL80211_FEATURE_STATIC_SMPS))
3521                                 return -EINVAL;
3522                         break;
3523                 case NL80211_SMPS_DYNAMIC:
3524                         if (!(rdev->wiphy.features &
3525                               NL80211_FEATURE_DYNAMIC_SMPS))
3526                                 return -EINVAL;
3527                         break;
3528                 default:
3529                         return -EINVAL;
3530                 }
3531         } else {
3532                 params.smps_mode = NL80211_SMPS_OFF;
3533         }
3534
3535         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3536                 params.acl = parse_acl_data(&rdev->wiphy, info);
3537                 if (IS_ERR(params.acl))
3538                         return PTR_ERR(params.acl);
3539         }
3540
3541         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3542         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3543                 return -EOPNOTSUPP;
3544
3545         wdev_lock(wdev);
3546         err = rdev_start_ap(rdev, dev, &params);
3547         if (!err) {
3548                 wdev->preset_chandef = params.chandef;
3549                 wdev->beacon_interval = params.beacon_interval;
3550                 wdev->chandef = params.chandef;
3551                 wdev->ssid_len = params.ssid_len;
3552                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3553         }
3554         wdev_unlock(wdev);
3555
3556         kfree(params.acl);
3557
3558         return err;
3559 }
3560
3561 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3562 {
3563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3564         struct net_device *dev = info->user_ptr[1];
3565         struct wireless_dev *wdev = dev->ieee80211_ptr;
3566         struct cfg80211_beacon_data params;
3567         int err;
3568
3569         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3570             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3571                 return -EOPNOTSUPP;
3572
3573         if (!rdev->ops->change_beacon)
3574                 return -EOPNOTSUPP;
3575
3576         if (!wdev->beacon_interval)
3577                 return -EINVAL;
3578
3579         err = nl80211_parse_beacon(info->attrs, &params);
3580         if (err)
3581                 return err;
3582
3583         wdev_lock(wdev);
3584         err = rdev_change_beacon(rdev, dev, &params);
3585         wdev_unlock(wdev);
3586
3587         return err;
3588 }
3589
3590 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3591 {
3592         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3593         struct net_device *dev = info->user_ptr[1];
3594
3595         return cfg80211_stop_ap(rdev, dev, false);
3596 }
3597
3598 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3599         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3600         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3601         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3602         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3603         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3604         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3605 };
3606
3607 static int parse_station_flags(struct genl_info *info,
3608                                enum nl80211_iftype iftype,
3609                                struct station_parameters *params)
3610 {
3611         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3612         struct nlattr *nla;
3613         int flag;
3614
3615         /*
3616          * Try parsing the new attribute first so userspace
3617          * can specify both for older kernels.
3618          */
3619         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3620         if (nla) {
3621                 struct nl80211_sta_flag_update *sta_flags;
3622
3623                 sta_flags = nla_data(nla);
3624                 params->sta_flags_mask = sta_flags->mask;
3625                 params->sta_flags_set = sta_flags->set;
3626                 params->sta_flags_set &= params->sta_flags_mask;
3627                 if ((params->sta_flags_mask |
3628                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3629                         return -EINVAL;
3630                 return 0;
3631         }
3632
3633         /* if present, parse the old attribute */
3634
3635         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3636         if (!nla)
3637                 return 0;
3638
3639         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3640                              nla, sta_flags_policy))
3641                 return -EINVAL;
3642
3643         /*
3644          * Only allow certain flags for interface types so that
3645          * other attributes are silently ignored. Remember that
3646          * this is backward compatibility code with old userspace
3647          * and shouldn't be hit in other cases anyway.
3648          */
3649         switch (iftype) {
3650         case NL80211_IFTYPE_AP:
3651         case NL80211_IFTYPE_AP_VLAN:
3652         case NL80211_IFTYPE_P2P_GO:
3653                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3654                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3655                                          BIT(NL80211_STA_FLAG_WME) |
3656                                          BIT(NL80211_STA_FLAG_MFP);
3657                 break;
3658         case NL80211_IFTYPE_P2P_CLIENT:
3659         case NL80211_IFTYPE_STATION:
3660                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3661                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3662                 break;
3663         case NL80211_IFTYPE_MESH_POINT:
3664                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3665                                          BIT(NL80211_STA_FLAG_MFP) |
3666                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3667         default:
3668                 return -EINVAL;
3669         }
3670
3671         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3672                 if (flags[flag]) {
3673                         params->sta_flags_set |= (1<<flag);
3674
3675                         /* no longer support new API additions in old API */
3676                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3677                                 return -EINVAL;
3678                 }
3679         }
3680
3681         return 0;
3682 }
3683
3684 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3685                                  int attr)
3686 {
3687         struct nlattr *rate;
3688         u32 bitrate;
3689         u16 bitrate_compat;
3690         enum nl80211_attrs rate_flg;
3691
3692         rate = nla_nest_start(msg, attr);
3693         if (!rate)
3694                 return false;
3695
3696         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3697         bitrate = cfg80211_calculate_bitrate(info);
3698         /* report 16-bit bitrate only if we can */
3699         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3700         if (bitrate > 0 &&
3701             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3702                 return false;
3703         if (bitrate_compat > 0 &&
3704             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3705                 return false;
3706
3707         switch (info->bw) {
3708         case RATE_INFO_BW_5:
3709                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3710                 break;
3711         case RATE_INFO_BW_10:
3712                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3713                 break;
3714         default:
3715                 WARN_ON(1);
3716                 /* fall through */
3717         case RATE_INFO_BW_20:
3718                 rate_flg = 0;
3719                 break;
3720         case RATE_INFO_BW_40:
3721                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3722                 break;
3723         case RATE_INFO_BW_80:
3724                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3725                 break;
3726         case RATE_INFO_BW_160:
3727                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3728                 break;
3729         }
3730
3731         if (rate_flg && nla_put_flag(msg, rate_flg))
3732                 return false;
3733
3734         if (info->flags & RATE_INFO_FLAGS_MCS) {
3735                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3736                         return false;
3737                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3738                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3739                         return false;
3740         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3741                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3742                         return false;
3743                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3744                         return false;
3745                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3746                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3747                         return false;
3748         }
3749
3750         nla_nest_end(msg, rate);
3751         return true;
3752 }
3753
3754 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3755                                int id)
3756 {
3757         void *attr;
3758         int i = 0;
3759
3760         if (!mask)
3761                 return true;
3762
3763         attr = nla_nest_start(msg, id);
3764         if (!attr)
3765                 return false;
3766
3767         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3768                 if (!(mask & BIT(i)))
3769                         continue;
3770
3771                 if (nla_put_u8(msg, i, signal[i]))
3772                         return false;
3773         }
3774
3775         nla_nest_end(msg, attr);
3776
3777         return true;
3778 }
3779
3780 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3781                                 u32 seq, int flags,
3782                                 struct cfg80211_registered_device *rdev,
3783                                 struct net_device *dev,
3784                                 const u8 *mac_addr, struct station_info *sinfo)
3785 {
3786         void *hdr;
3787         struct nlattr *sinfoattr, *bss_param;
3788
3789         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3790         if (!hdr)
3791                 return -1;
3792
3793         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3794             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3795             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3796                 goto nla_put_failure;
3797
3798         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3799         if (!sinfoattr)
3800                 goto nla_put_failure;
3801
3802 #define PUT_SINFO(attr, memb, type) do {                                \
3803         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
3804         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3805             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3806                              sinfo->memb))                              \
3807                 goto nla_put_failure;                                   \
3808         } while (0)
3809 #define PUT_SINFO_U64(attr, memb) do {                                  \
3810         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3811             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
3812                               sinfo->memb, NL80211_STA_INFO_PAD))       \
3813                 goto nla_put_failure;                                   \
3814         } while (0)
3815
3816         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3817         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3818
3819         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3820                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3821             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3822                         (u32)sinfo->rx_bytes))
3823                 goto nla_put_failure;
3824
3825         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3826                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3827             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3828                         (u32)sinfo->tx_bytes))
3829                 goto nla_put_failure;
3830
3831         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3832         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3833         PUT_SINFO(LLID, llid, u16);
3834         PUT_SINFO(PLID, plid, u16);
3835         PUT_SINFO(PLINK_STATE, plink_state, u8);
3836         PUT_SINFO_U64(RX_DURATION, rx_duration);
3837
3838         switch (rdev->wiphy.signal_type) {
3839         case CFG80211_SIGNAL_TYPE_MBM:
3840                 PUT_SINFO(SIGNAL, signal, u8);
3841                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3842                 break;
3843         default:
3844                 break;
3845         }
3846         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3847                 if (!nl80211_put_signal(msg, sinfo->chains,
3848                                         sinfo->chain_signal,
3849                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3850                         goto nla_put_failure;
3851         }
3852         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3853                 if (!nl80211_put_signal(msg, sinfo->chains,
3854                                         sinfo->chain_signal_avg,
3855                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3856                         goto nla_put_failure;
3857         }
3858         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3859                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3860                                           NL80211_STA_INFO_TX_BITRATE))
3861                         goto nla_put_failure;
3862         }
3863         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3864                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3865                                           NL80211_STA_INFO_RX_BITRATE))
3866                         goto nla_put_failure;
3867         }
3868
3869         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3870         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3871         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3872         PUT_SINFO(TX_FAILED, tx_failed, u32);
3873         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3874         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3875         PUT_SINFO(LOCAL_PM, local_pm, u32);
3876         PUT_SINFO(PEER_PM, peer_pm, u32);
3877         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3878
3879         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3880                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3881                 if (!bss_param)
3882                         goto nla_put_failure;
3883
3884                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3885                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3886                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3887                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3888                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3889                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3890                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3891                                sinfo->bss_param.dtim_period) ||
3892                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3893                                 sinfo->bss_param.beacon_interval))
3894                         goto nla_put_failure;
3895
3896                 nla_nest_end(msg, bss_param);
3897         }
3898         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3899             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3900                     sizeof(struct nl80211_sta_flag_update),
3901                     &sinfo->sta_flags))
3902                 goto nla_put_failure;
3903
3904         PUT_SINFO_U64(T_OFFSET, t_offset);
3905         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3906         PUT_SINFO_U64(BEACON_RX, rx_beacon);
3907         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3908
3909 #undef PUT_SINFO
3910 #undef PUT_SINFO_U64
3911
3912         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3913                 struct nlattr *tidsattr;
3914                 int tid;
3915
3916                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3917                 if (!tidsattr)
3918                         goto nla_put_failure;
3919
3920                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3921                         struct cfg80211_tid_stats *tidstats;
3922                         struct nlattr *tidattr;
3923
3924                         tidstats = &sinfo->pertid[tid];
3925
3926                         if (!tidstats->filled)
3927                                 continue;
3928
3929                         tidattr = nla_nest_start(msg, tid + 1);
3930                         if (!tidattr)
3931                                 goto nla_put_failure;
3932
3933 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
3934         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3935             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
3936                               tidstats->memb, NL80211_TID_STATS_PAD))   \
3937                 goto nla_put_failure;                                   \
3938         } while (0)
3939
3940                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
3941                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
3942                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
3943                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
3944
3945 #undef PUT_TIDVAL_U64
3946                         nla_nest_end(msg, tidattr);
3947                 }
3948
3949                 nla_nest_end(msg, tidsattr);
3950         }
3951
3952         nla_nest_end(msg, sinfoattr);
3953
3954         if (sinfo->assoc_req_ies_len &&
3955             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3956                     sinfo->assoc_req_ies))
3957                 goto nla_put_failure;
3958
3959         genlmsg_end(msg, hdr);
3960         return 0;
3961
3962  nla_put_failure:
3963         genlmsg_cancel(msg, hdr);
3964         return -EMSGSIZE;
3965 }
3966
3967 static int nl80211_dump_station(struct sk_buff *skb,
3968                                 struct netlink_callback *cb)
3969 {
3970         struct station_info sinfo;
3971         struct cfg80211_registered_device *rdev;
3972         struct wireless_dev *wdev;
3973         u8 mac_addr[ETH_ALEN];
3974         int sta_idx = cb->args[2];
3975         int err;
3976
3977         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3978         if (err)
3979                 return err;
3980
3981         if (!wdev->netdev) {
3982                 err = -EINVAL;
3983                 goto out_err;
3984         }
3985
3986         if (!rdev->ops->dump_station) {
3987                 err = -EOPNOTSUPP;
3988                 goto out_err;
3989         }
3990
3991         while (1) {
3992                 memset(&sinfo, 0, sizeof(sinfo));
3993                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3994                                         mac_addr, &sinfo);
3995                 if (err == -ENOENT)
3996                         break;
3997                 if (err)
3998                         goto out_err;
3999
4000                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4001                                 NETLINK_CB(cb->skb).portid,
4002                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4003                                 rdev, wdev->netdev, mac_addr,
4004                                 &sinfo) < 0)
4005                         goto out;
4006
4007                 sta_idx++;
4008         }
4009
4010  out:
4011         cb->args[2] = sta_idx;
4012         err = skb->len;
4013  out_err:
4014         nl80211_finish_wdev_dump(rdev);
4015
4016         return err;
4017 }
4018
4019 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4020 {
4021         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4022         struct net_device *dev = info->user_ptr[1];
4023         struct station_info sinfo;
4024         struct sk_buff *msg;
4025         u8 *mac_addr = NULL;
4026         int err;
4027
4028         memset(&sinfo, 0, sizeof(sinfo));
4029
4030         if (!info->attrs[NL80211_ATTR_MAC])
4031                 return -EINVAL;
4032
4033         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4034
4035         if (!rdev->ops->get_station)
4036                 return -EOPNOTSUPP;
4037
4038         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4039         if (err)
4040                 return err;
4041
4042         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4043         if (!msg)
4044                 return -ENOMEM;
4045
4046         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4047                                  info->snd_portid, info->snd_seq, 0,
4048                                  rdev, dev, mac_addr, &sinfo) < 0) {
4049                 nlmsg_free(msg);
4050                 return -ENOBUFS;
4051         }
4052
4053         return genlmsg_reply(msg, info);
4054 }
4055
4056 int cfg80211_check_station_change(struct wiphy *wiphy,
4057                                   struct station_parameters *params,
4058                                   enum cfg80211_station_type statype)
4059 {
4060         if (params->listen_interval != -1 &&
4061             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4062                 return -EINVAL;
4063
4064         if (params->support_p2p_ps != -1 &&
4065             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4066                 return -EINVAL;
4067
4068         if (params->aid &&
4069             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4070             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4071                 return -EINVAL;
4072
4073         /* When you run into this, adjust the code below for the new flag */
4074         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4075
4076         switch (statype) {
4077         case CFG80211_STA_MESH_PEER_KERNEL:
4078         case CFG80211_STA_MESH_PEER_USER:
4079                 /*
4080                  * No ignoring the TDLS flag here -- the userspace mesh
4081                  * code doesn't have the bug of including TDLS in the
4082                  * mask everywhere.
4083                  */
4084                 if (params->sta_flags_mask &
4085                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4086                                   BIT(NL80211_STA_FLAG_MFP) |
4087                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4088                         return -EINVAL;
4089                 break;
4090         case CFG80211_STA_TDLS_PEER_SETUP:
4091         case CFG80211_STA_TDLS_PEER_ACTIVE:
4092                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4093                         return -EINVAL;
4094                 /* ignore since it can't change */
4095                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4096                 break;
4097         default:
4098                 /* disallow mesh-specific things */
4099                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4100                         return -EINVAL;
4101                 if (params->local_pm)
4102                         return -EINVAL;
4103                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4104                         return -EINVAL;
4105         }
4106
4107         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4108             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4109                 /* TDLS can't be set, ... */
4110                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4111                         return -EINVAL;
4112                 /*
4113                  * ... but don't bother the driver with it. This works around
4114                  * a hostapd/wpa_supplicant issue -- it always includes the
4115                  * TLDS_PEER flag in the mask even for AP mode.
4116                  */
4117                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4118         }
4119
4120         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4121             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4122                 /* reject other things that can't change */
4123                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4124                         return -EINVAL;
4125                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4126                         return -EINVAL;
4127                 if (params->supported_rates)
4128                         return -EINVAL;
4129                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4130                         return -EINVAL;
4131         }
4132
4133         if (statype != CFG80211_STA_AP_CLIENT &&
4134             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4135                 if (params->vlan)
4136                         return -EINVAL;
4137         }
4138
4139         switch (statype) {
4140         case CFG80211_STA_AP_MLME_CLIENT:
4141                 /* Use this only for authorizing/unauthorizing a station */
4142                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4143                         return -EOPNOTSUPP;
4144                 break;
4145         case CFG80211_STA_AP_CLIENT:
4146         case CFG80211_STA_AP_CLIENT_UNASSOC:
4147                 /* accept only the listed bits */
4148                 if (params->sta_flags_mask &
4149                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4150                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4151                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4152                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4153                                   BIT(NL80211_STA_FLAG_WME) |
4154                                   BIT(NL80211_STA_FLAG_MFP)))
4155                         return -EINVAL;
4156
4157                 /* but authenticated/associated only if driver handles it */
4158                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4159                     params->sta_flags_mask &
4160                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4161                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4162                         return -EINVAL;
4163                 break;
4164         case CFG80211_STA_IBSS:
4165         case CFG80211_STA_AP_STA:
4166                 /* reject any changes other than AUTHORIZED */
4167                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4168                         return -EINVAL;
4169                 break;
4170         case CFG80211_STA_TDLS_PEER_SETUP:
4171                 /* reject any changes other than AUTHORIZED or WME */
4172                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4173                                                BIT(NL80211_STA_FLAG_WME)))
4174                         return -EINVAL;
4175                 /* force (at least) rates when authorizing */
4176                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4177                     !params->supported_rates)
4178                         return -EINVAL;
4179                 break;
4180         case CFG80211_STA_TDLS_PEER_ACTIVE:
4181                 /* reject any changes */
4182                 return -EINVAL;
4183         case CFG80211_STA_MESH_PEER_KERNEL:
4184                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4185                         return -EINVAL;
4186                 break;
4187         case CFG80211_STA_MESH_PEER_USER:
4188                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4189                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4190                         return -EINVAL;
4191                 break;
4192         }
4193
4194         return 0;
4195 }
4196 EXPORT_SYMBOL(cfg80211_check_station_change);
4197
4198 /*
4199  * Get vlan interface making sure it is running and on the right wiphy.
4200  */
4201 static struct net_device *get_vlan(struct genl_info *info,
4202                                    struct cfg80211_registered_device *rdev)
4203 {
4204         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4205         struct net_device *v;
4206         int ret;
4207
4208         if (!vlanattr)
4209                 return NULL;
4210
4211         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4212         if (!v)
4213                 return ERR_PTR(-ENODEV);
4214
4215         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4216                 ret = -EINVAL;
4217                 goto error;
4218         }
4219
4220         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4221             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4222             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4223                 ret = -EINVAL;
4224                 goto error;
4225         }
4226
4227         if (!netif_running(v)) {
4228                 ret = -ENETDOWN;
4229                 goto error;
4230         }
4231
4232         return v;
4233  error:
4234         dev_put(v);
4235         return ERR_PTR(ret);
4236 }
4237
4238 static const struct nla_policy
4239 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4240         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4241         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4242 };
4243
4244 static int nl80211_parse_sta_wme(struct genl_info *info,
4245                                  struct station_parameters *params)
4246 {
4247         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4248         struct nlattr *nla;
4249         int err;
4250
4251         /* parse WME attributes if present */
4252         if (!info->attrs[NL80211_ATTR_STA_WME])
4253                 return 0;
4254
4255         nla = info->attrs[NL80211_ATTR_STA_WME];
4256         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4257                                nl80211_sta_wme_policy);
4258         if (err)
4259                 return err;
4260
4261         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4262                 params->uapsd_queues = nla_get_u8(
4263                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4264         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4265                 return -EINVAL;
4266
4267         if (tb[NL80211_STA_WME_MAX_SP])
4268                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4269
4270         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4271                 return -EINVAL;
4272
4273         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4274
4275         return 0;
4276 }
4277
4278 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4279                                       struct station_parameters *params)
4280 {
4281         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4282                 params->supported_channels =
4283                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4284                 params->supported_channels_len =
4285                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4286                 /*
4287                  * Need to include at least one (first channel, number of
4288                  * channels) tuple for each subband, and must have proper
4289                  * tuples for the rest of the data as well.
4290                  */
4291                 if (params->supported_channels_len < 2)
4292                         return -EINVAL;
4293                 if (params->supported_channels_len % 2)
4294                         return -EINVAL;
4295         }
4296
4297         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4298                 params->supported_oper_classes =
4299                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4300                 params->supported_oper_classes_len =
4301                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4302                 /*
4303                  * The value of the Length field of the Supported Operating
4304                  * Classes element is between 2 and 253.
4305                  */
4306                 if (params->supported_oper_classes_len < 2 ||
4307                     params->supported_oper_classes_len > 253)
4308                         return -EINVAL;
4309         }
4310         return 0;
4311 }
4312
4313 static int nl80211_set_station_tdls(struct genl_info *info,
4314                                     struct station_parameters *params)
4315 {
4316         int err;
4317         /* Dummy STA entry gets updated once the peer capabilities are known */
4318         if (info->attrs[NL80211_ATTR_PEER_AID])
4319                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4320         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4321                 params->ht_capa =
4322                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4323         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4324                 params->vht_capa =
4325                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4326
4327         err = nl80211_parse_sta_channel_info(info, params);
4328         if (err)
4329                 return err;
4330
4331         return nl80211_parse_sta_wme(info, params);
4332 }
4333
4334 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4335 {
4336         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4337         struct net_device *dev = info->user_ptr[1];
4338         struct station_parameters params;
4339         u8 *mac_addr;
4340         int err;
4341
4342         memset(&params, 0, sizeof(params));
4343
4344         if (!rdev->ops->change_station)
4345                 return -EOPNOTSUPP;
4346
4347         /*
4348          * AID and listen_interval properties can be set only for unassociated
4349          * station. Include these parameters here and will check them in
4350          * cfg80211_check_station_change().
4351          */
4352         if (info->attrs[NL80211_ATTR_STA_AID])
4353                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4354
4355         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4356                 params.listen_interval =
4357                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4358         else
4359                 params.listen_interval = -1;
4360
4361         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4362                 u8 tmp;
4363
4364                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4365                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4366                         return -EINVAL;
4367
4368                 params.support_p2p_ps = tmp;
4369         } else {
4370                 params.support_p2p_ps = -1;
4371         }
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 (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4379                 params.supported_rates =
4380                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4381                 params.supported_rates_len =
4382                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4383         }
4384
4385         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4386                 params.capability =
4387                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4388                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4389         }
4390
4391         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4392                 params.ext_capab =
4393                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4394                 params.ext_capab_len =
4395                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4396         }
4397
4398         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4399                 return -EINVAL;
4400
4401         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4402                 params.plink_action =
4403                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4404                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4405                         return -EINVAL;
4406         }
4407
4408         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4409                 params.plink_state =
4410                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4411                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4412                         return -EINVAL;
4413                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4414         }
4415
4416         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4417                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4418                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4419
4420                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4421                     pm > NL80211_MESH_POWER_MAX)
4422                         return -EINVAL;
4423
4424                 params.local_pm = pm;
4425         }
4426
4427         /* Include parameters for TDLS peer (will check later) */
4428         err = nl80211_set_station_tdls(info, &params);
4429         if (err)
4430                 return err;
4431
4432         params.vlan = get_vlan(info, rdev);
4433         if (IS_ERR(params.vlan))
4434                 return PTR_ERR(params.vlan);
4435
4436         switch (dev->ieee80211_ptr->iftype) {
4437         case NL80211_IFTYPE_AP:
4438         case NL80211_IFTYPE_AP_VLAN:
4439         case NL80211_IFTYPE_P2P_GO:
4440         case NL80211_IFTYPE_P2P_CLIENT:
4441         case NL80211_IFTYPE_STATION:
4442         case NL80211_IFTYPE_ADHOC:
4443         case NL80211_IFTYPE_MESH_POINT:
4444                 break;
4445         default:
4446                 err = -EOPNOTSUPP;
4447                 goto out_put_vlan;
4448         }
4449
4450         /* driver will call cfg80211_check_station_change() */
4451         err = rdev_change_station(rdev, dev, mac_addr, &params);
4452
4453  out_put_vlan:
4454         if (params.vlan)
4455                 dev_put(params.vlan);
4456
4457         return err;
4458 }
4459
4460 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4461 {
4462         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4463         int err;
4464         struct net_device *dev = info->user_ptr[1];
4465         struct station_parameters params;
4466         u8 *mac_addr = NULL;
4467         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4468                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4469
4470         memset(&params, 0, sizeof(params));
4471
4472         if (!rdev->ops->add_station)
4473                 return -EOPNOTSUPP;
4474
4475         if (!info->attrs[NL80211_ATTR_MAC])
4476                 return -EINVAL;
4477
4478         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4479                 return -EINVAL;
4480
4481         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4482                 return -EINVAL;
4483
4484         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4485             !info->attrs[NL80211_ATTR_PEER_AID])
4486                 return -EINVAL;
4487
4488         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4489         params.supported_rates =
4490                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4491         params.supported_rates_len =
4492                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4493         params.listen_interval =
4494                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4495
4496         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4497                 u8 tmp;
4498
4499                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4500                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4501                         return -EINVAL;
4502
4503                 params.support_p2p_ps = tmp;
4504         } else {
4505                 /*
4506                  * if not specified, assume it's supported for P2P GO interface,
4507                  * and is NOT supported for AP interface
4508                  */
4509                 params.support_p2p_ps =
4510                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4511         }
4512
4513         if (info->attrs[NL80211_ATTR_PEER_AID])
4514                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4515         else
4516                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4517         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4518                 return -EINVAL;
4519
4520         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4521                 params.capability =
4522                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4523                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4524         }
4525
4526         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4527                 params.ext_capab =
4528                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4529                 params.ext_capab_len =
4530                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4531         }
4532
4533         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4534                 params.ht_capa =
4535                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4536
4537         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4538                 params.vht_capa =
4539                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4540
4541         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4542                 params.opmode_notif_used = true;
4543                 params.opmode_notif =
4544                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4545         }
4546
4547         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4548                 params.plink_action =
4549                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4550                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4551                         return -EINVAL;
4552         }
4553
4554         err = nl80211_parse_sta_channel_info(info, &params);
4555         if (err)
4556                 return err;
4557
4558         err = nl80211_parse_sta_wme(info, &params);
4559         if (err)
4560                 return err;
4561
4562         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4563                 return -EINVAL;
4564
4565         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4566          * as userspace might just pass through the capabilities from the IEs
4567          * directly, rather than enforcing this restriction and returning an
4568          * error in this case.
4569          */
4570         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4571                 params.ht_capa = NULL;
4572                 params.vht_capa = NULL;
4573         }
4574
4575         /* When you run into this, adjust the code below for the new flag */
4576         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4577
4578         switch (dev->ieee80211_ptr->iftype) {
4579         case NL80211_IFTYPE_AP:
4580         case NL80211_IFTYPE_AP_VLAN:
4581         case NL80211_IFTYPE_P2P_GO:
4582                 /* ignore WME attributes if iface/sta is not capable */
4583                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4584                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4585                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4586
4587                 /* TDLS peers cannot be added */
4588                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4589                     info->attrs[NL80211_ATTR_PEER_AID])
4590                         return -EINVAL;
4591                 /* but don't bother the driver with it */
4592                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4593
4594                 /* allow authenticated/associated only if driver handles it */
4595                 if (!(rdev->wiphy.features &
4596                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4597                     params.sta_flags_mask & auth_assoc)
4598                         return -EINVAL;
4599
4600                 /* Older userspace, or userspace wanting to be compatible with
4601                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4602                  * and assoc flags in the mask, but assumes the station will be
4603                  * added as associated anyway since this was the required driver
4604                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4605                  * introduced.
4606                  * In order to not bother drivers with this quirk in the API
4607                  * set the flags in both the mask and set for new stations in
4608                  * this case.
4609                  */
4610                 if (!(params.sta_flags_mask & auth_assoc)) {
4611                         params.sta_flags_mask |= auth_assoc;
4612                         params.sta_flags_set |= auth_assoc;
4613                 }
4614
4615                 /* must be last in here for error handling */
4616                 params.vlan = get_vlan(info, rdev);
4617                 if (IS_ERR(params.vlan))
4618                         return PTR_ERR(params.vlan);
4619                 break;
4620         case NL80211_IFTYPE_MESH_POINT:
4621                 /* ignore uAPSD data */
4622                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4623
4624                 /* associated is disallowed */
4625                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4626                         return -EINVAL;
4627                 /* TDLS peers cannot be added */
4628                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4629                     info->attrs[NL80211_ATTR_PEER_AID])
4630                         return -EINVAL;
4631                 break;
4632         case NL80211_IFTYPE_STATION:
4633         case NL80211_IFTYPE_P2P_CLIENT:
4634                 /* ignore uAPSD data */
4635                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4636
4637                 /* these are disallowed */
4638                 if (params.sta_flags_mask &
4639                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4640                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4641                         return -EINVAL;
4642                 /* Only TDLS peers can be added */
4643                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4644                         return -EINVAL;
4645                 /* Can only add if TDLS ... */
4646                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4647                         return -EOPNOTSUPP;
4648                 /* ... with external setup is supported */
4649                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4650                         return -EOPNOTSUPP;
4651                 /*
4652                  * Older wpa_supplicant versions always mark the TDLS peer
4653                  * as authorized, but it shouldn't yet be.
4654                  */
4655                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4656                 break;
4657         default:
4658                 return -EOPNOTSUPP;
4659         }
4660
4661         /* be aware of params.vlan when changing code here */
4662
4663         err = rdev_add_station(rdev, dev, mac_addr, &params);
4664
4665         if (params.vlan)
4666                 dev_put(params.vlan);
4667         return err;
4668 }
4669
4670 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4671 {
4672         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4673         struct net_device *dev = info->user_ptr[1];
4674         struct station_del_parameters params;
4675
4676         memset(&params, 0, sizeof(params));
4677
4678         if (info->attrs[NL80211_ATTR_MAC])
4679                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4680
4681         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4682             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4683             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4684             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4685                 return -EINVAL;
4686
4687         if (!rdev->ops->del_station)
4688                 return -EOPNOTSUPP;
4689
4690         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4691                 params.subtype =
4692                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4693                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4694                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4695                         return -EINVAL;
4696         } else {
4697                 /* Default to Deauthentication frame */
4698                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4699         }
4700
4701         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4702                 params.reason_code =
4703                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4704                 if (params.reason_code == 0)
4705                         return -EINVAL; /* 0 is reserved */
4706         } else {
4707                 /* Default to reason code 2 */
4708                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4709         }
4710
4711         return rdev_del_station(rdev, dev, &params);
4712 }
4713
4714 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4715                                 int flags, struct net_device *dev,
4716                                 u8 *dst, u8 *next_hop,
4717                                 struct mpath_info *pinfo)
4718 {
4719         void *hdr;
4720         struct nlattr *pinfoattr;
4721
4722         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4723         if (!hdr)
4724                 return -1;
4725
4726         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4727             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4728             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4729             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4730                 goto nla_put_failure;
4731
4732         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4733         if (!pinfoattr)
4734                 goto nla_put_failure;
4735         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4736             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4737                         pinfo->frame_qlen))
4738                 goto nla_put_failure;
4739         if (((pinfo->filled & MPATH_INFO_SN) &&
4740              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4741             ((pinfo->filled & MPATH_INFO_METRIC) &&
4742              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4743                          pinfo->metric)) ||
4744             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4745              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4746                          pinfo->exptime)) ||
4747             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4748              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4749                         pinfo->flags)) ||
4750             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4751              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4752                          pinfo->discovery_timeout)) ||
4753             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4754              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4755                         pinfo->discovery_retries)))
4756                 goto nla_put_failure;
4757
4758         nla_nest_end(msg, pinfoattr);
4759
4760         genlmsg_end(msg, hdr);
4761         return 0;
4762
4763  nla_put_failure:
4764         genlmsg_cancel(msg, hdr);
4765         return -EMSGSIZE;
4766 }
4767
4768 static int nl80211_dump_mpath(struct sk_buff *skb,
4769                               struct netlink_callback *cb)
4770 {
4771         struct mpath_info pinfo;
4772         struct cfg80211_registered_device *rdev;
4773         struct wireless_dev *wdev;
4774         u8 dst[ETH_ALEN];
4775         u8 next_hop[ETH_ALEN];
4776         int path_idx = cb->args[2];
4777         int err;
4778
4779         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4780         if (err)
4781                 return err;
4782
4783         if (!rdev->ops->dump_mpath) {
4784                 err = -EOPNOTSUPP;
4785                 goto out_err;
4786         }
4787
4788         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4789                 err = -EOPNOTSUPP;
4790                 goto out_err;
4791         }
4792
4793         while (1) {
4794                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4795                                       next_hop, &pinfo);
4796                 if (err == -ENOENT)
4797                         break;
4798                 if (err)
4799                         goto out_err;
4800
4801                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4802                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4803                                        wdev->netdev, dst, next_hop,
4804                                        &pinfo) < 0)
4805                         goto out;
4806
4807                 path_idx++;
4808         }
4809
4810  out:
4811         cb->args[2] = path_idx;
4812         err = skb->len;
4813  out_err:
4814         nl80211_finish_wdev_dump(rdev);
4815         return err;
4816 }
4817
4818 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4819 {
4820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4821         int err;
4822         struct net_device *dev = info->user_ptr[1];
4823         struct mpath_info pinfo;
4824         struct sk_buff *msg;
4825         u8 *dst = NULL;
4826         u8 next_hop[ETH_ALEN];
4827
4828         memset(&pinfo, 0, sizeof(pinfo));
4829
4830         if (!info->attrs[NL80211_ATTR_MAC])
4831                 return -EINVAL;
4832
4833         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4834
4835         if (!rdev->ops->get_mpath)
4836                 return -EOPNOTSUPP;
4837
4838         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4839                 return -EOPNOTSUPP;
4840
4841         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4842         if (err)
4843                 return err;
4844
4845         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4846         if (!msg)
4847                 return -ENOMEM;
4848
4849         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4850                                  dev, dst, next_hop, &pinfo) < 0) {
4851                 nlmsg_free(msg);
4852                 return -ENOBUFS;
4853         }
4854
4855         return genlmsg_reply(msg, info);
4856 }
4857
4858 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4859 {
4860         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4861         struct net_device *dev = info->user_ptr[1];
4862         u8 *dst = NULL;
4863         u8 *next_hop = NULL;
4864
4865         if (!info->attrs[NL80211_ATTR_MAC])
4866                 return -EINVAL;
4867
4868         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4869                 return -EINVAL;
4870
4871         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4872         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4873
4874         if (!rdev->ops->change_mpath)
4875                 return -EOPNOTSUPP;
4876
4877         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4878                 return -EOPNOTSUPP;
4879
4880         return rdev_change_mpath(rdev, dev, dst, next_hop);
4881 }
4882
4883 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4884 {
4885         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4886         struct net_device *dev = info->user_ptr[1];
4887         u8 *dst = NULL;
4888         u8 *next_hop = NULL;
4889
4890         if (!info->attrs[NL80211_ATTR_MAC])
4891                 return -EINVAL;
4892
4893         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4894                 return -EINVAL;
4895
4896         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4897         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4898
4899         if (!rdev->ops->add_mpath)
4900                 return -EOPNOTSUPP;
4901
4902         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4903                 return -EOPNOTSUPP;
4904
4905         return rdev_add_mpath(rdev, dev, dst, next_hop);
4906 }
4907
4908 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4909 {
4910         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4911         struct net_device *dev = info->user_ptr[1];
4912         u8 *dst = NULL;
4913
4914         if (info->attrs[NL80211_ATTR_MAC])
4915                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4916
4917         if (!rdev->ops->del_mpath)
4918                 return -EOPNOTSUPP;
4919
4920         return rdev_del_mpath(rdev, dev, dst);
4921 }
4922
4923 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4924 {
4925         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4926         int err;
4927         struct net_device *dev = info->user_ptr[1];
4928         struct mpath_info pinfo;
4929         struct sk_buff *msg;
4930         u8 *dst = NULL;
4931         u8 mpp[ETH_ALEN];
4932
4933         memset(&pinfo, 0, sizeof(pinfo));
4934
4935         if (!info->attrs[NL80211_ATTR_MAC])
4936                 return -EINVAL;
4937
4938         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4939
4940         if (!rdev->ops->get_mpp)
4941                 return -EOPNOTSUPP;
4942
4943         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4944                 return -EOPNOTSUPP;
4945
4946         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4947         if (err)
4948                 return err;
4949
4950         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4951         if (!msg)
4952                 return -ENOMEM;
4953
4954         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4955                                dev, dst, mpp, &pinfo) < 0) {
4956                 nlmsg_free(msg);
4957                 return -ENOBUFS;
4958         }
4959
4960         return genlmsg_reply(msg, info);
4961 }
4962
4963 static int nl80211_dump_mpp(struct sk_buff *skb,
4964                             struct netlink_callback *cb)
4965 {
4966         struct mpath_info pinfo;
4967         struct cfg80211_registered_device *rdev;
4968         struct wireless_dev *wdev;
4969         u8 dst[ETH_ALEN];
4970         u8 mpp[ETH_ALEN];
4971         int path_idx = cb->args[2];
4972         int err;
4973
4974         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4975         if (err)
4976                 return err;
4977
4978         if (!rdev->ops->dump_mpp) {
4979                 err = -EOPNOTSUPP;
4980                 goto out_err;
4981         }
4982
4983         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4984                 err = -EOPNOTSUPP;
4985                 goto out_err;
4986         }
4987
4988         while (1) {
4989                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4990                                     mpp, &pinfo);
4991                 if (err == -ENOENT)
4992                         break;
4993                 if (err)
4994                         goto out_err;
4995
4996                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4997                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4998                                        wdev->netdev, dst, mpp,
4999                                        &pinfo) < 0)
5000                         goto out;
5001
5002                 path_idx++;
5003         }
5004
5005  out:
5006         cb->args[2] = path_idx;
5007         err = skb->len;
5008  out_err:
5009         nl80211_finish_wdev_dump(rdev);
5010         return err;
5011 }
5012
5013 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5014 {
5015         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5016         struct net_device *dev = info->user_ptr[1];
5017         struct wireless_dev *wdev = dev->ieee80211_ptr;
5018         struct bss_parameters params;
5019         int err;
5020
5021         memset(&params, 0, sizeof(params));
5022         /* default to not changing parameters */
5023         params.use_cts_prot = -1;
5024         params.use_short_preamble = -1;
5025         params.use_short_slot_time = -1;
5026         params.ap_isolate = -1;
5027         params.ht_opmode = -1;
5028         params.p2p_ctwindow = -1;
5029         params.p2p_opp_ps = -1;
5030
5031         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5032                 params.use_cts_prot =
5033                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5034         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5035                 params.use_short_preamble =
5036                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5037         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5038                 params.use_short_slot_time =
5039                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5040         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5041                 params.basic_rates =
5042                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5043                 params.basic_rates_len =
5044                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5045         }
5046         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5047                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5048         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5049                 params.ht_opmode =
5050                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5051
5052         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5053                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5054                         return -EINVAL;
5055                 params.p2p_ctwindow =
5056                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5057                 if (params.p2p_ctwindow < 0)
5058                         return -EINVAL;
5059                 if (params.p2p_ctwindow != 0 &&
5060                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5061                         return -EINVAL;
5062         }
5063
5064         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5065                 u8 tmp;
5066
5067                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5068                         return -EINVAL;
5069                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5070                 if (tmp > 1)
5071                         return -EINVAL;
5072                 params.p2p_opp_ps = tmp;
5073                 if (params.p2p_opp_ps &&
5074                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5075                         return -EINVAL;
5076         }
5077
5078         if (!rdev->ops->change_bss)
5079                 return -EOPNOTSUPP;
5080
5081         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5082             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5083                 return -EOPNOTSUPP;
5084
5085         wdev_lock(wdev);
5086         err = rdev_change_bss(rdev, dev, &params);
5087         wdev_unlock(wdev);
5088
5089         return err;
5090 }
5091
5092 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5093 {
5094         char *data = NULL;
5095         bool is_indoor;
5096         enum nl80211_user_reg_hint_type user_reg_hint_type;
5097         u32 owner_nlportid;
5098
5099         /*
5100          * You should only get this when cfg80211 hasn't yet initialized
5101          * completely when built-in to the kernel right between the time
5102          * window between nl80211_init() and regulatory_init(), if that is
5103          * even possible.
5104          */
5105         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5106                 return -EINPROGRESS;
5107
5108         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5109                 user_reg_hint_type =
5110                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5111         else
5112                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5113
5114         switch (user_reg_hint_type) {
5115         case NL80211_USER_REG_HINT_USER:
5116         case NL80211_USER_REG_HINT_CELL_BASE:
5117                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5118                         return -EINVAL;
5119
5120                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5121                 return regulatory_hint_user(data, user_reg_hint_type);
5122         case NL80211_USER_REG_HINT_INDOOR:
5123                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5124                         owner_nlportid = info->snd_portid;
5125                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5126                 } else {
5127                         owner_nlportid = 0;
5128                         is_indoor = true;
5129                 }
5130
5131                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5132         default:
5133                 return -EINVAL;
5134         }
5135 }
5136
5137 static int nl80211_get_mesh_config(struct sk_buff *skb,
5138                                    struct genl_info *info)
5139 {
5140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5141         struct net_device *dev = info->user_ptr[1];
5142         struct wireless_dev *wdev = dev->ieee80211_ptr;
5143         struct mesh_config cur_params;
5144         int err = 0;
5145         void *hdr;
5146         struct nlattr *pinfoattr;
5147         struct sk_buff *msg;
5148
5149         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5150                 return -EOPNOTSUPP;
5151
5152         if (!rdev->ops->get_mesh_config)
5153                 return -EOPNOTSUPP;
5154
5155         wdev_lock(wdev);
5156         /* If not connected, get default parameters */
5157         if (!wdev->mesh_id_len)
5158                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5159         else
5160                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5161         wdev_unlock(wdev);
5162
5163         if (err)
5164                 return err;
5165
5166         /* Draw up a netlink message to send back */
5167         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5168         if (!msg)
5169                 return -ENOMEM;
5170         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5171                              NL80211_CMD_GET_MESH_CONFIG);
5172         if (!hdr)
5173                 goto out;
5174         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5175         if (!pinfoattr)
5176                 goto nla_put_failure;
5177         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5178             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5179                         cur_params.dot11MeshRetryTimeout) ||
5180             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5181                         cur_params.dot11MeshConfirmTimeout) ||
5182             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5183                         cur_params.dot11MeshHoldingTimeout) ||
5184             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5185                         cur_params.dot11MeshMaxPeerLinks) ||
5186             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5187                        cur_params.dot11MeshMaxRetries) ||
5188             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5189                        cur_params.dot11MeshTTL) ||
5190             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5191                        cur_params.element_ttl) ||
5192             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5193                        cur_params.auto_open_plinks) ||
5194             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5195                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5196             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5197                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5198             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5199                         cur_params.path_refresh_time) ||
5200             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5201                         cur_params.min_discovery_timeout) ||
5202             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5203                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5204             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5205                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5206             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5207                         cur_params.dot11MeshHWMPperrMinInterval) ||
5208             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5209                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5210             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5211                        cur_params.dot11MeshHWMPRootMode) ||
5212             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5213                         cur_params.dot11MeshHWMPRannInterval) ||
5214             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5215                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5216             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5217                        cur_params.dot11MeshForwarding) ||
5218             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5219                         cur_params.rssi_threshold) ||
5220             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5221                         cur_params.ht_opmode) ||
5222             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5223                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5224             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5225                         cur_params.dot11MeshHWMProotInterval) ||
5226             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5227                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5228             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5229                         cur_params.power_mode) ||
5230             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5231                         cur_params.dot11MeshAwakeWindowDuration) ||
5232             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5233                         cur_params.plink_timeout))
5234                 goto nla_put_failure;
5235         nla_nest_end(msg, pinfoattr);
5236         genlmsg_end(msg, hdr);
5237         return genlmsg_reply(msg, info);
5238
5239  nla_put_failure:
5240         genlmsg_cancel(msg, hdr);
5241  out:
5242         nlmsg_free(msg);
5243         return -ENOBUFS;
5244 }
5245
5246 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5247         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5248         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5249         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5250         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5251         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5252         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5253         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5254         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5255         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5256         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5257         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5258         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5259         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5260         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5261         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5262         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5263         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5264         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5265         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5266         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5267         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5268         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5269         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5270         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5271         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5272         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5273         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5274         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5275 };
5276
5277 static const struct nla_policy
5278         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5279         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5280         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5281         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5282         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5283         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5284         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5285         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5286                                     .len = IEEE80211_MAX_DATA_LEN },
5287         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5288 };
5289
5290 static int nl80211_parse_mesh_config(struct genl_info *info,
5291                                      struct mesh_config *cfg,
5292                                      u32 *mask_out)
5293 {
5294         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5295         u32 mask = 0;
5296
5297 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5298 do {                                                                        \
5299         if (tb[attr]) {                                                     \
5300                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5301                         return -EINVAL;                                     \
5302                 cfg->param = fn(tb[attr]);                                  \
5303                 mask |= (1 << (attr - 1));                                  \
5304         }                                                                   \
5305 } while (0)
5306
5307         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5308                 return -EINVAL;
5309         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5310                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5311                              nl80211_meshconf_params_policy))
5312                 return -EINVAL;
5313
5314         /* This makes sure that there aren't more than 32 mesh config
5315          * parameters (otherwise our bitfield scheme would not work.) */
5316         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5317
5318         /* Fill in the params struct */
5319         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5320                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5321                                   nla_get_u16);
5322         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5323                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5324                                   nla_get_u16);
5325         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5326                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5327                                   nla_get_u16);
5328         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5329                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5330                                   nla_get_u16);
5331         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5332                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5333                                   nla_get_u8);
5334         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5335                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5336         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5337                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5338                                   nla_get_u8);
5339         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5340                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5341                                   nla_get_u8);
5342         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5343                                   1, 255, mask,
5344                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5345                                   nla_get_u32);
5346         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5347                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5348                                   nla_get_u8);
5349         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5350                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5351                                   nla_get_u32);
5352         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5353                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5354                                   nla_get_u16);
5355         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5356                                   1, 65535, mask,
5357                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5358                                   nla_get_u32);
5359         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5360                                   1, 65535, mask,
5361                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5362                                   nla_get_u16);
5363         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5364                                   1, 65535, mask,
5365                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5366                                   nla_get_u16);
5367         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5368                                   dot11MeshHWMPnetDiameterTraversalTime,
5369                                   1, 65535, mask,
5370                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5371                                   nla_get_u16);
5372         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5373                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5374                                   nla_get_u8);
5375         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5376                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5377                                   nla_get_u16);
5378         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5379                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5380                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5381                                   nla_get_u8);
5382         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5383                                   mask, NL80211_MESHCONF_FORWARDING,
5384                                   nla_get_u8);
5385         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5386                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5387                                   nla_get_s32);
5388         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5389                                   mask, NL80211_MESHCONF_HT_OPMODE,
5390                                   nla_get_u16);
5391         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5392                                   1, 65535, mask,
5393                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5394                                   nla_get_u32);
5395         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5396                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5397                                   nla_get_u16);
5398         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5399                                   dot11MeshHWMPconfirmationInterval,
5400                                   1, 65535, mask,
5401                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5402                                   nla_get_u16);
5403         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5404                                   NL80211_MESH_POWER_ACTIVE,
5405                                   NL80211_MESH_POWER_MAX,
5406                                   mask, NL80211_MESHCONF_POWER_MODE,
5407                                   nla_get_u32);
5408         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5409                                   0, 65535, mask,
5410                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5411         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5412                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5413                                   nla_get_u32);
5414         if (mask_out)
5415                 *mask_out = mask;
5416
5417         return 0;
5418
5419 #undef FILL_IN_MESH_PARAM_IF_SET
5420 }
5421
5422 static int nl80211_parse_mesh_setup(struct genl_info *info,
5423                                      struct mesh_setup *setup)
5424 {
5425         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5426         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5427
5428         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5429                 return -EINVAL;
5430         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5431                              info->attrs[NL80211_ATTR_MESH_SETUP],
5432                              nl80211_mesh_setup_params_policy))
5433                 return -EINVAL;
5434
5435         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5436                 setup->sync_method =
5437                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5438                  IEEE80211_SYNC_METHOD_VENDOR :
5439                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5440
5441         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5442                 setup->path_sel_proto =
5443                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5444                  IEEE80211_PATH_PROTOCOL_VENDOR :
5445                  IEEE80211_PATH_PROTOCOL_HWMP;
5446
5447         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5448                 setup->path_metric =
5449                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5450                  IEEE80211_PATH_METRIC_VENDOR :
5451                  IEEE80211_PATH_METRIC_AIRTIME;
5452
5453         if (tb[NL80211_MESH_SETUP_IE]) {
5454                 struct nlattr *ieattr =
5455                         tb[NL80211_MESH_SETUP_IE];
5456                 if (!is_valid_ie_attr(ieattr))
5457                         return -EINVAL;
5458                 setup->ie = nla_data(ieattr);
5459                 setup->ie_len = nla_len(ieattr);
5460         }
5461         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5462             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5463                 return -EINVAL;
5464         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5465         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5466         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5467         if (setup->is_secure)
5468                 setup->user_mpm = true;
5469
5470         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5471                 if (!setup->user_mpm)
5472                         return -EINVAL;
5473                 setup->auth_id =
5474                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5475         }
5476
5477         return 0;
5478 }
5479
5480 static int nl80211_update_mesh_config(struct sk_buff *skb,
5481                                       struct genl_info *info)
5482 {
5483         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5484         struct net_device *dev = info->user_ptr[1];
5485         struct wireless_dev *wdev = dev->ieee80211_ptr;
5486         struct mesh_config cfg;
5487         u32 mask;
5488         int err;
5489
5490         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5491                 return -EOPNOTSUPP;
5492
5493         if (!rdev->ops->update_mesh_config)
5494                 return -EOPNOTSUPP;
5495
5496         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5497         if (err)
5498                 return err;
5499
5500         wdev_lock(wdev);
5501         if (!wdev->mesh_id_len)
5502                 err = -ENOLINK;
5503
5504         if (!err)
5505                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5506
5507         wdev_unlock(wdev);
5508
5509         return err;
5510 }
5511
5512 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5513                               struct sk_buff *msg)
5514 {
5515         struct nlattr *nl_reg_rules;
5516         unsigned int i;
5517
5518         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5519             (regdom->dfs_region &&
5520              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5521                 goto nla_put_failure;
5522
5523         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5524         if (!nl_reg_rules)
5525                 goto nla_put_failure;
5526
5527         for (i = 0; i < regdom->n_reg_rules; i++) {
5528                 struct nlattr *nl_reg_rule;
5529                 const struct ieee80211_reg_rule *reg_rule;
5530                 const struct ieee80211_freq_range *freq_range;
5531                 const struct ieee80211_power_rule *power_rule;
5532                 unsigned int max_bandwidth_khz;
5533
5534                 reg_rule = &regdom->reg_rules[i];
5535                 freq_range = &reg_rule->freq_range;
5536                 power_rule = &reg_rule->power_rule;
5537
5538                 nl_reg_rule = nla_nest_start(msg, i);
5539                 if (!nl_reg_rule)
5540                         goto nla_put_failure;
5541
5542                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5543                 if (!max_bandwidth_khz)
5544                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5545                                                                   reg_rule);
5546
5547                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5548                                 reg_rule->flags) ||
5549                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5550                                 freq_range->start_freq_khz) ||
5551                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5552                                 freq_range->end_freq_khz) ||
5553                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5554                                 max_bandwidth_khz) ||
5555                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5556                                 power_rule->max_antenna_gain) ||
5557                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5558                                 power_rule->max_eirp) ||
5559                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5560                                 reg_rule->dfs_cac_ms))
5561                         goto nla_put_failure;
5562
5563                 nla_nest_end(msg, nl_reg_rule);
5564         }
5565
5566         nla_nest_end(msg, nl_reg_rules);
5567         return 0;
5568
5569 nla_put_failure:
5570         return -EMSGSIZE;
5571 }
5572
5573 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5574 {
5575         const struct ieee80211_regdomain *regdom = NULL;
5576         struct cfg80211_registered_device *rdev;
5577         struct wiphy *wiphy = NULL;
5578         struct sk_buff *msg;
5579         void *hdr;
5580
5581         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5582         if (!msg)
5583                 return -ENOBUFS;
5584
5585         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5586                              NL80211_CMD_GET_REG);
5587         if (!hdr)
5588                 goto put_failure;
5589
5590         if (info->attrs[NL80211_ATTR_WIPHY]) {
5591                 bool self_managed;
5592
5593                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5594                 if (IS_ERR(rdev)) {
5595                         nlmsg_free(msg);
5596                         return PTR_ERR(rdev);
5597                 }
5598
5599                 wiphy = &rdev->wiphy;
5600                 self_managed = wiphy->regulatory_flags &
5601                                REGULATORY_WIPHY_SELF_MANAGED;
5602                 regdom = get_wiphy_regdom(wiphy);
5603
5604                 /* a self-managed-reg device must have a private regdom */
5605                 if (WARN_ON(!regdom && self_managed)) {
5606                         nlmsg_free(msg);
5607                         return -EINVAL;
5608                 }
5609
5610                 if (regdom &&
5611                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5612                         goto nla_put_failure;
5613         }
5614
5615         if (!wiphy && reg_last_request_cell_base() &&
5616             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5617                         NL80211_USER_REG_HINT_CELL_BASE))
5618                 goto nla_put_failure;
5619
5620         rcu_read_lock();
5621
5622         if (!regdom)
5623                 regdom = rcu_dereference(cfg80211_regdomain);
5624
5625         if (nl80211_put_regdom(regdom, msg))
5626                 goto nla_put_failure_rcu;
5627
5628         rcu_read_unlock();
5629
5630         genlmsg_end(msg, hdr);
5631         return genlmsg_reply(msg, info);
5632
5633 nla_put_failure_rcu:
5634         rcu_read_unlock();
5635 nla_put_failure:
5636         genlmsg_cancel(msg, hdr);
5637 put_failure:
5638         nlmsg_free(msg);
5639         return -EMSGSIZE;
5640 }
5641
5642 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5643                                u32 seq, int flags, struct wiphy *wiphy,
5644                                const struct ieee80211_regdomain *regdom)
5645 {
5646         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5647                                    NL80211_CMD_GET_REG);
5648
5649         if (!hdr)
5650                 return -1;
5651
5652         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5653
5654         if (nl80211_put_regdom(regdom, msg))
5655                 goto nla_put_failure;
5656
5657         if (!wiphy && reg_last_request_cell_base() &&
5658             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5659                         NL80211_USER_REG_HINT_CELL_BASE))
5660                 goto nla_put_failure;
5661
5662         if (wiphy &&
5663             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5664                 goto nla_put_failure;
5665
5666         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5667             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5668                 goto nla_put_failure;
5669
5670         genlmsg_end(msg, hdr);
5671         return 0;
5672
5673 nla_put_failure:
5674         genlmsg_cancel(msg, hdr);
5675         return -EMSGSIZE;
5676 }
5677
5678 static int nl80211_get_reg_dump(struct sk_buff *skb,
5679                                 struct netlink_callback *cb)
5680 {
5681         const struct ieee80211_regdomain *regdom = NULL;
5682         struct cfg80211_registered_device *rdev;
5683         int err, reg_idx, start = cb->args[2];
5684
5685         rtnl_lock();
5686
5687         if (cfg80211_regdomain && start == 0) {
5688                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5689                                           NLM_F_MULTI, NULL,
5690                                           rtnl_dereference(cfg80211_regdomain));
5691                 if (err < 0)
5692                         goto out_err;
5693         }
5694
5695         /* the global regdom is idx 0 */
5696         reg_idx = 1;
5697         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5698                 regdom = get_wiphy_regdom(&rdev->wiphy);
5699                 if (!regdom)
5700                         continue;
5701
5702                 if (++reg_idx <= start)
5703                         continue;
5704
5705                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5706                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5707                 if (err < 0) {
5708                         reg_idx--;
5709                         break;
5710                 }
5711         }
5712
5713         cb->args[2] = reg_idx;
5714         err = skb->len;
5715 out_err:
5716         rtnl_unlock();
5717         return err;
5718 }
5719
5720 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5721 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5722         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5723         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5724         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5725         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5726         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5727         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5728         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5729 };
5730
5731 static int parse_reg_rule(struct nlattr *tb[],
5732         struct ieee80211_reg_rule *reg_rule)
5733 {
5734         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5735         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5736
5737         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5738                 return -EINVAL;
5739         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5740                 return -EINVAL;
5741         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5742                 return -EINVAL;
5743         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5744                 return -EINVAL;
5745         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5746                 return -EINVAL;
5747
5748         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5749
5750         freq_range->start_freq_khz =
5751                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5752         freq_range->end_freq_khz =
5753                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5754         freq_range->max_bandwidth_khz =
5755                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5756
5757         power_rule->max_eirp =
5758                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5759
5760         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5761                 power_rule->max_antenna_gain =
5762                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5763
5764         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5765                 reg_rule->dfs_cac_ms =
5766                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5767
5768         return 0;
5769 }
5770
5771 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5772 {
5773         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5774         struct nlattr *nl_reg_rule;
5775         char *alpha2;
5776         int rem_reg_rules, r;
5777         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5778         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5779         struct ieee80211_regdomain *rd;
5780
5781         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5782                 return -EINVAL;
5783
5784         if (!info->attrs[NL80211_ATTR_REG_RULES])
5785                 return -EINVAL;
5786
5787         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5788
5789         if (info->attrs[NL80211_ATTR_DFS_REGION])
5790                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5791
5792         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5793                             rem_reg_rules) {
5794                 num_rules++;
5795                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5796                         return -EINVAL;
5797         }
5798
5799         if (!reg_is_valid_request(alpha2))
5800                 return -EINVAL;
5801
5802         size_of_regd = sizeof(struct ieee80211_regdomain) +
5803                        num_rules * sizeof(struct ieee80211_reg_rule);
5804
5805         rd = kzalloc(size_of_regd, GFP_KERNEL);
5806         if (!rd)
5807                 return -ENOMEM;
5808
5809         rd->n_reg_rules = num_rules;
5810         rd->alpha2[0] = alpha2[0];
5811         rd->alpha2[1] = alpha2[1];
5812
5813         /*
5814          * Disable DFS master mode if the DFS region was
5815          * not supported or known on this kernel.
5816          */
5817         if (reg_supported_dfs_region(dfs_region))
5818                 rd->dfs_region = dfs_region;
5819
5820         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5821                             rem_reg_rules) {
5822                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5823                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5824                               reg_rule_policy);
5825                 if (r)
5826                         goto bad_reg;
5827                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5828                 if (r)
5829                         goto bad_reg;
5830
5831                 rule_idx++;
5832
5833                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5834                         r = -EINVAL;
5835                         goto bad_reg;
5836                 }
5837         }
5838
5839         r = set_regdom(rd, REGD_SOURCE_CRDA);
5840         /* set_regdom took ownership */
5841         rd = NULL;
5842
5843  bad_reg:
5844         kfree(rd);
5845         return r;
5846 }
5847 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5848
5849 static int validate_scan_freqs(struct nlattr *freqs)
5850 {
5851         struct nlattr *attr1, *attr2;
5852         int n_channels = 0, tmp1, tmp2;
5853
5854         nla_for_each_nested(attr1, freqs, tmp1) {
5855                 n_channels++;
5856                 /*
5857                  * Some hardware has a limited channel list for
5858                  * scanning, and it is pretty much nonsensical
5859                  * to scan for a channel twice, so disallow that
5860                  * and don't require drivers to check that the
5861                  * channel list they get isn't longer than what
5862                  * they can scan, as long as they can scan all
5863                  * the channels they registered at once.
5864                  */
5865                 nla_for_each_nested(attr2, freqs, tmp2)
5866                         if (attr1 != attr2 &&
5867                             nla_get_u32(attr1) == nla_get_u32(attr2))
5868                                 return 0;
5869         }
5870
5871         return n_channels;
5872 }
5873
5874 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
5875 {
5876         return b < NUM_NL80211_BANDS && wiphy->bands[b];
5877 }
5878
5879 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
5880                             struct cfg80211_bss_selection *bss_select)
5881 {
5882         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
5883         struct nlattr *nest;
5884         int err;
5885         bool found = false;
5886         int i;
5887
5888         /* only process one nested attribute */
5889         nest = nla_data(nla);
5890         if (!nla_ok(nest, nla_len(nest)))
5891                 return -EINVAL;
5892
5893         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
5894                         nla_len(nest), nl80211_bss_select_policy);
5895         if (err)
5896                 return err;
5897
5898         /* only one attribute may be given */
5899         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
5900                 if (attr[i]) {
5901                         if (found)
5902                                 return -EINVAL;
5903                         found = true;
5904                 }
5905         }
5906
5907         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
5908
5909         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
5910                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
5911
5912         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
5913                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
5914                 bss_select->param.band_pref =
5915                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
5916                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
5917                         return -EINVAL;
5918         }
5919
5920         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
5921                 struct nl80211_bss_select_rssi_adjust *adj_param;
5922
5923                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
5924                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
5925                 bss_select->param.adjust.band = adj_param->band;
5926                 bss_select->param.adjust.delta = adj_param->delta;
5927                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
5928                         return -EINVAL;
5929         }
5930
5931         /* user-space did not provide behaviour attribute */
5932         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
5933                 return -EINVAL;
5934
5935         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
5936                 return -EINVAL;
5937
5938         return 0;
5939 }
5940
5941 static int nl80211_parse_random_mac(struct nlattr **attrs,
5942                                     u8 *mac_addr, u8 *mac_addr_mask)
5943 {
5944         int i;
5945
5946         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5947                 eth_zero_addr(mac_addr);
5948                 eth_zero_addr(mac_addr_mask);
5949                 mac_addr[0] = 0x2;
5950                 mac_addr_mask[0] = 0x3;
5951
5952                 return 0;
5953         }
5954
5955         /* need both or none */
5956         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5957                 return -EINVAL;
5958
5959         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5960         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5961
5962         /* don't allow or configure an mcast address */
5963         if (!is_multicast_ether_addr(mac_addr_mask) ||
5964             is_multicast_ether_addr(mac_addr))
5965                 return -EINVAL;
5966
5967         /*
5968          * allow users to pass a MAC address that has bits set outside
5969          * of the mask, but don't bother drivers with having to deal
5970          * with such bits
5971          */
5972         for (i = 0; i < ETH_ALEN; i++)
5973                 mac_addr[i] &= mac_addr_mask[i];
5974
5975         return 0;
5976 }
5977
5978 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5979 {
5980         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5981         struct wireless_dev *wdev = info->user_ptr[1];
5982         struct cfg80211_scan_request *request;
5983         struct nlattr *attr;
5984         struct wiphy *wiphy;
5985         int err, tmp, n_ssids = 0, n_channels, i;
5986         size_t ie_len;
5987
5988         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5989                 return -EINVAL;
5990
5991         wiphy = &rdev->wiphy;
5992
5993         if (!rdev->ops->scan)
5994                 return -EOPNOTSUPP;
5995
5996         if (rdev->scan_req || rdev->scan_msg) {
5997                 err = -EBUSY;
5998                 goto unlock;
5999         }
6000
6001         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6002                 n_channels = validate_scan_freqs(
6003                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6004                 if (!n_channels) {
6005                         err = -EINVAL;
6006                         goto unlock;
6007                 }
6008         } else {
6009                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6010         }
6011
6012         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6013                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6014                         n_ssids++;
6015
6016         if (n_ssids > wiphy->max_scan_ssids) {
6017                 err = -EINVAL;
6018                 goto unlock;
6019         }
6020
6021         if (info->attrs[NL80211_ATTR_IE])
6022                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6023         else
6024                 ie_len = 0;
6025
6026         if (ie_len > wiphy->max_scan_ie_len) {
6027                 err = -EINVAL;
6028                 goto unlock;
6029         }
6030
6031         request = kzalloc(sizeof(*request)
6032                         + sizeof(*request->ssids) * n_ssids
6033                         + sizeof(*request->channels) * n_channels
6034                         + ie_len, GFP_KERNEL);
6035         if (!request) {
6036                 err = -ENOMEM;
6037                 goto unlock;
6038         }
6039
6040         if (n_ssids)
6041                 request->ssids = (void *)&request->channels[n_channels];
6042         request->n_ssids = n_ssids;
6043         if (ie_len) {
6044                 if (n_ssids)
6045                         request->ie = (void *)(request->ssids + n_ssids);
6046                 else
6047                         request->ie = (void *)(request->channels + n_channels);
6048         }
6049
6050         i = 0;
6051         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6052                 /* user specified, bail out if channel not found */
6053                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6054                         struct ieee80211_channel *chan;
6055
6056                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6057
6058                         if (!chan) {
6059                                 err = -EINVAL;
6060                                 goto out_free;
6061                         }
6062
6063                         /* ignore disabled channels */
6064                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6065                                 continue;
6066
6067                         request->channels[i] = chan;
6068                         i++;
6069                 }
6070         } else {
6071                 enum nl80211_band band;
6072
6073                 /* all channels */
6074                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6075                         int j;
6076
6077                         if (!wiphy->bands[band])
6078                                 continue;
6079                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6080                                 struct ieee80211_channel *chan;
6081
6082                                 chan = &wiphy->bands[band]->channels[j];
6083
6084                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6085                                         continue;
6086
6087                                 request->channels[i] = chan;
6088                                 i++;
6089                         }
6090                 }
6091         }
6092
6093         if (!i) {
6094                 err = -EINVAL;
6095                 goto out_free;
6096         }
6097
6098         request->n_channels = i;
6099
6100         i = 0;
6101         if (n_ssids) {
6102                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6103                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6104                                 err = -EINVAL;
6105                                 goto out_free;
6106                         }
6107                         request->ssids[i].ssid_len = nla_len(attr);
6108                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6109                         i++;
6110                 }
6111         }
6112
6113         if (info->attrs[NL80211_ATTR_IE]) {
6114                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6115                 memcpy((void *)request->ie,
6116                        nla_data(info->attrs[NL80211_ATTR_IE]),
6117                        request->ie_len);
6118         }
6119
6120         for (i = 0; i < NUM_NL80211_BANDS; i++)
6121                 if (wiphy->bands[i])
6122                         request->rates[i] =
6123                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6124
6125         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6126                 nla_for_each_nested(attr,
6127                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6128                                     tmp) {
6129                         enum nl80211_band band = nla_type(attr);
6130
6131                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6132                                 err = -EINVAL;
6133                                 goto out_free;
6134                         }
6135
6136                         if (!wiphy->bands[band])
6137                                 continue;
6138
6139                         err = ieee80211_get_ratemask(wiphy->bands[band],
6140                                                      nla_data(attr),
6141                                                      nla_len(attr),
6142                                                      &request->rates[band]);
6143                         if (err)
6144                                 goto out_free;
6145                 }
6146         }
6147
6148         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6149                 request->flags = nla_get_u32(
6150                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6151                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6152                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6153                         err = -EOPNOTSUPP;
6154                         goto out_free;
6155                 }
6156
6157                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6158                         if (!(wiphy->features &
6159                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6160                                 err = -EOPNOTSUPP;
6161                                 goto out_free;
6162                         }
6163
6164                         if (wdev->current_bss) {
6165                                 err = -EOPNOTSUPP;
6166                                 goto out_free;
6167                         }
6168
6169                         err = nl80211_parse_random_mac(info->attrs,
6170                                                        request->mac_addr,
6171                                                        request->mac_addr_mask);
6172                         if (err)
6173                                 goto out_free;
6174                 }
6175         }
6176
6177         request->no_cck =
6178                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6179
6180         if (info->attrs[NL80211_ATTR_MAC])
6181                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6182                        ETH_ALEN);
6183         else
6184                 eth_broadcast_addr(request->bssid);
6185
6186         request->wdev = wdev;
6187         request->wiphy = &rdev->wiphy;
6188         request->scan_start = jiffies;
6189
6190         rdev->scan_req = request;
6191         err = rdev_scan(rdev, request);
6192
6193         if (!err) {
6194                 nl80211_send_scan_start(rdev, wdev);
6195                 if (wdev->netdev)
6196                         dev_hold(wdev->netdev);
6197         } else {
6198  out_free:
6199                 rdev->scan_req = NULL;
6200                 kfree(request);
6201         }
6202
6203  unlock:
6204         return err;
6205 }
6206
6207 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6208 {
6209         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6210         struct wireless_dev *wdev = info->user_ptr[1];
6211
6212         if (!rdev->ops->abort_scan)
6213                 return -EOPNOTSUPP;
6214
6215         if (rdev->scan_msg)
6216                 return 0;
6217
6218         if (!rdev->scan_req)
6219                 return -ENOENT;
6220
6221         rdev_abort_scan(rdev, wdev);
6222         return 0;
6223 }
6224
6225 static int
6226 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6227                                struct cfg80211_sched_scan_request *request,
6228                                struct nlattr **attrs)
6229 {
6230         int tmp, err, i = 0;
6231         struct nlattr *attr;
6232
6233         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6234                 u32 interval;
6235
6236                 /*
6237                  * If scan plans are not specified,
6238                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6239                  * case one scan plan will be set with the specified scan
6240                  * interval and infinite number of iterations.
6241                  */
6242                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6243                         return -EINVAL;
6244
6245                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6246                 if (!interval)
6247                         return -EINVAL;
6248
6249                 request->scan_plans[0].interval =
6250                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6251                 if (!request->scan_plans[0].interval)
6252                         return -EINVAL;
6253
6254                 if (request->scan_plans[0].interval >
6255                     wiphy->max_sched_scan_plan_interval)
6256                         request->scan_plans[0].interval =
6257                                 wiphy->max_sched_scan_plan_interval;
6258
6259                 return 0;
6260         }
6261
6262         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6263                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6264
6265                 if (WARN_ON(i >= n_plans))
6266                         return -EINVAL;
6267
6268                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6269                                 nla_data(attr), nla_len(attr),
6270                                 nl80211_plan_policy);
6271                 if (err)
6272                         return err;
6273
6274                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6275                         return -EINVAL;
6276
6277                 request->scan_plans[i].interval =
6278                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6279                 if (!request->scan_plans[i].interval ||
6280                     request->scan_plans[i].interval >
6281                     wiphy->max_sched_scan_plan_interval)
6282                         return -EINVAL;
6283
6284                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6285                         request->scan_plans[i].iterations =
6286                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6287                         if (!request->scan_plans[i].iterations ||
6288                             (request->scan_plans[i].iterations >
6289                              wiphy->max_sched_scan_plan_iterations))
6290                                 return -EINVAL;
6291                 } else if (i < n_plans - 1) {
6292                         /*
6293                          * All scan plans but the last one must specify
6294                          * a finite number of iterations
6295                          */
6296                         return -EINVAL;
6297                 }
6298
6299                 i++;
6300         }
6301
6302         /*
6303          * The last scan plan must not specify the number of
6304          * iterations, it is supposed to run infinitely
6305          */
6306         if (request->scan_plans[n_plans - 1].iterations)
6307                 return  -EINVAL;
6308
6309         return 0;
6310 }
6311
6312 static struct cfg80211_sched_scan_request *
6313 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6314                          struct nlattr **attrs)
6315 {
6316         struct cfg80211_sched_scan_request *request;
6317         struct nlattr *attr;
6318         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6319         enum nl80211_band band;
6320         size_t ie_len;
6321         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6322         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6323
6324         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6325                 return ERR_PTR(-EINVAL);
6326
6327         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6328                 n_channels = validate_scan_freqs(
6329                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6330                 if (!n_channels)
6331                         return ERR_PTR(-EINVAL);
6332         } else {
6333                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6334         }
6335
6336         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6337                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6338                                     tmp)
6339                         n_ssids++;
6340
6341         if (n_ssids > wiphy->max_sched_scan_ssids)
6342                 return ERR_PTR(-EINVAL);
6343
6344         /*
6345          * First, count the number of 'real' matchsets. Due to an issue with
6346          * the old implementation, matchsets containing only the RSSI attribute
6347          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6348          * RSSI for all matchsets, rather than their own matchset for reporting
6349          * all APs with a strong RSSI. This is needed to be compatible with
6350          * older userspace that treated a matchset with only the RSSI as the
6351          * global RSSI for all other matchsets - if there are other matchsets.
6352          */
6353         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6354                 nla_for_each_nested(attr,
6355                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6356                                     tmp) {
6357                         struct nlattr *rssi;
6358
6359                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6360                                         nla_data(attr), nla_len(attr),
6361                                         nl80211_match_policy);
6362                         if (err)
6363                                 return ERR_PTR(err);
6364                         /* add other standalone attributes here */
6365                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6366                                 n_match_sets++;
6367                                 continue;
6368                         }
6369                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6370                         if (rssi)
6371                                 default_match_rssi = nla_get_s32(rssi);
6372                 }
6373         }
6374
6375         /* However, if there's no other matchset, add the RSSI one */
6376         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6377                 n_match_sets = 1;
6378
6379         if (n_match_sets > wiphy->max_match_sets)
6380                 return ERR_PTR(-EINVAL);
6381
6382         if (attrs[NL80211_ATTR_IE])
6383                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6384         else
6385                 ie_len = 0;
6386
6387         if (ie_len > wiphy->max_sched_scan_ie_len)
6388                 return ERR_PTR(-EINVAL);
6389
6390         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6391                 /*
6392                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6393                  * each scan plan already specifies its own interval
6394                  */
6395                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6396                         return ERR_PTR(-EINVAL);
6397
6398                 nla_for_each_nested(attr,
6399                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6400                         n_plans++;
6401         } else {
6402                 /*
6403                  * The scan interval attribute is kept for backward
6404                  * compatibility. If no scan plans are specified and sched scan
6405                  * interval is specified, one scan plan will be set with this
6406                  * scan interval and infinite number of iterations.
6407                  */
6408                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6409                         return ERR_PTR(-EINVAL);
6410
6411                 n_plans = 1;
6412         }
6413
6414         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6415                 return ERR_PTR(-EINVAL);
6416
6417         request = kzalloc(sizeof(*request)
6418                         + sizeof(*request->ssids) * n_ssids
6419                         + sizeof(*request->match_sets) * n_match_sets
6420                         + sizeof(*request->scan_plans) * n_plans
6421                         + sizeof(*request->channels) * n_channels
6422                         + ie_len, GFP_KERNEL);
6423         if (!request)
6424                 return ERR_PTR(-ENOMEM);
6425
6426         if (n_ssids)
6427                 request->ssids = (void *)&request->channels[n_channels];
6428         request->n_ssids = n_ssids;
6429         if (ie_len) {
6430                 if (n_ssids)
6431                         request->ie = (void *)(request->ssids + n_ssids);
6432                 else
6433                         request->ie = (void *)(request->channels + n_channels);
6434         }
6435
6436         if (n_match_sets) {
6437                 if (request->ie)
6438                         request->match_sets = (void *)(request->ie + ie_len);
6439                 else if (n_ssids)
6440                         request->match_sets =
6441                                 (void *)(request->ssids + n_ssids);
6442                 else
6443                         request->match_sets =
6444                                 (void *)(request->channels + n_channels);
6445         }
6446         request->n_match_sets = n_match_sets;
6447
6448         if (n_match_sets)
6449                 request->scan_plans = (void *)(request->match_sets +
6450                                                n_match_sets);
6451         else if (request->ie)
6452                 request->scan_plans = (void *)(request->ie + ie_len);
6453         else if (n_ssids)
6454                 request->scan_plans = (void *)(request->ssids + n_ssids);
6455         else
6456                 request->scan_plans = (void *)(request->channels + n_channels);
6457
6458         request->n_scan_plans = n_plans;
6459
6460         i = 0;
6461         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6462                 /* user specified, bail out if channel not found */
6463                 nla_for_each_nested(attr,
6464                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6465                                     tmp) {
6466                         struct ieee80211_channel *chan;
6467
6468                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6469
6470                         if (!chan) {
6471                                 err = -EINVAL;
6472                                 goto out_free;
6473                         }
6474
6475                         /* ignore disabled channels */
6476                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6477                                 continue;
6478
6479                         request->channels[i] = chan;
6480                         i++;
6481                 }
6482         } else {
6483                 /* all channels */
6484                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6485                         int j;
6486
6487                         if (!wiphy->bands[band])
6488                                 continue;
6489                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6490                                 struct ieee80211_channel *chan;
6491
6492                                 chan = &wiphy->bands[band]->channels[j];
6493
6494                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6495                                         continue;
6496
6497                                 request->channels[i] = chan;
6498                                 i++;
6499                         }
6500                 }
6501         }
6502
6503         if (!i) {
6504                 err = -EINVAL;
6505                 goto out_free;
6506         }
6507
6508         request->n_channels = i;
6509
6510         i = 0;
6511         if (n_ssids) {
6512                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6513                                     tmp) {
6514                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6515                                 err = -EINVAL;
6516                                 goto out_free;
6517                         }
6518                         request->ssids[i].ssid_len = nla_len(attr);
6519                         memcpy(request->ssids[i].ssid, nla_data(attr),
6520                                nla_len(attr));
6521                         i++;
6522                 }
6523         }
6524
6525         i = 0;
6526         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6527                 nla_for_each_nested(attr,
6528                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6529                                     tmp) {
6530                         struct nlattr *ssid, *rssi;
6531
6532                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6533                                         nla_data(attr), nla_len(attr),
6534                                         nl80211_match_policy);
6535                         if (err)
6536                                 goto out_free;
6537                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6538                         if (ssid) {
6539                                 if (WARN_ON(i >= n_match_sets)) {
6540                                         /* this indicates a programming error,
6541                                          * the loop above should have verified
6542                                          * things properly
6543                                          */
6544                                         err = -EINVAL;
6545                                         goto out_free;
6546                                 }
6547
6548                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6549                                         err = -EINVAL;
6550                                         goto out_free;
6551                                 }
6552                                 memcpy(request->match_sets[i].ssid.ssid,
6553                                        nla_data(ssid), nla_len(ssid));
6554                                 request->match_sets[i].ssid.ssid_len =
6555                                         nla_len(ssid);
6556                                 /* special attribute - old implementation w/a */
6557                                 request->match_sets[i].rssi_thold =
6558                                         default_match_rssi;
6559                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6560                                 if (rssi)
6561                                         request->match_sets[i].rssi_thold =
6562                                                 nla_get_s32(rssi);
6563                         }
6564                         i++;
6565                 }
6566
6567                 /* there was no other matchset, so the RSSI one is alone */
6568                 if (i == 0 && n_match_sets)
6569                         request->match_sets[0].rssi_thold = default_match_rssi;
6570
6571                 request->min_rssi_thold = INT_MAX;
6572                 for (i = 0; i < n_match_sets; i++)
6573                         request->min_rssi_thold =
6574                                 min(request->match_sets[i].rssi_thold,
6575                                     request->min_rssi_thold);
6576         } else {
6577                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6578         }
6579
6580         if (ie_len) {
6581                 request->ie_len = ie_len;
6582                 memcpy((void *)request->ie,
6583                        nla_data(attrs[NL80211_ATTR_IE]),
6584                        request->ie_len);
6585         }
6586
6587         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6588                 request->flags = nla_get_u32(
6589                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6590                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6591                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6592                         err = -EOPNOTSUPP;
6593                         goto out_free;
6594                 }
6595
6596                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6597                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6598
6599                         if (!wdev) /* must be net-detect */
6600                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6601
6602                         if (!(wiphy->features & flg)) {
6603                                 err = -EOPNOTSUPP;
6604                                 goto out_free;
6605                         }
6606
6607                         if (wdev && wdev->current_bss) {
6608                                 err = -EOPNOTSUPP;
6609                                 goto out_free;
6610                         }
6611
6612                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6613                                                        request->mac_addr_mask);
6614                         if (err)
6615                                 goto out_free;
6616                 }
6617         }
6618
6619         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6620                 request->delay =
6621                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6622
6623         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6624         if (err)
6625                 goto out_free;
6626
6627         request->scan_start = jiffies;
6628
6629         return request;
6630
6631 out_free:
6632         kfree(request);
6633         return ERR_PTR(err);
6634 }
6635
6636 static int nl80211_start_sched_scan(struct sk_buff *skb,
6637                                     struct genl_info *info)
6638 {
6639         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6640         struct net_device *dev = info->user_ptr[1];
6641         struct wireless_dev *wdev = dev->ieee80211_ptr;
6642         struct cfg80211_sched_scan_request *sched_scan_req;
6643         int err;
6644
6645         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6646             !rdev->ops->sched_scan_start)
6647                 return -EOPNOTSUPP;
6648
6649         if (rdev->sched_scan_req)
6650                 return -EINPROGRESS;
6651
6652         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6653                                                   info->attrs);
6654
6655         err = PTR_ERR_OR_ZERO(sched_scan_req);
6656         if (err)
6657                 goto out_err;
6658
6659         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6660         if (err)
6661                 goto out_free;
6662
6663         sched_scan_req->dev = dev;
6664         sched_scan_req->wiphy = &rdev->wiphy;
6665
6666         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6667                 sched_scan_req->owner_nlportid = info->snd_portid;
6668
6669         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6670
6671         nl80211_send_sched_scan(rdev, dev,
6672                                 NL80211_CMD_START_SCHED_SCAN);
6673         return 0;
6674
6675 out_free:
6676         kfree(sched_scan_req);
6677 out_err:
6678         return err;
6679 }
6680
6681 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6682                                    struct genl_info *info)
6683 {
6684         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6685
6686         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6687             !rdev->ops->sched_scan_stop)
6688                 return -EOPNOTSUPP;
6689
6690         return __cfg80211_stop_sched_scan(rdev, false);
6691 }
6692
6693 static int nl80211_start_radar_detection(struct sk_buff *skb,
6694                                          struct genl_info *info)
6695 {
6696         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6697         struct net_device *dev = info->user_ptr[1];
6698         struct wireless_dev *wdev = dev->ieee80211_ptr;
6699         struct cfg80211_chan_def chandef;
6700         enum nl80211_dfs_regions dfs_region;
6701         unsigned int cac_time_ms;
6702         int err;
6703
6704         dfs_region = reg_get_dfs_region(wdev->wiphy);
6705         if (dfs_region == NL80211_DFS_UNSET)
6706                 return -EINVAL;
6707
6708         err = nl80211_parse_chandef(rdev, info, &chandef);
6709         if (err)
6710                 return err;
6711
6712         if (netif_carrier_ok(dev))
6713                 return -EBUSY;
6714
6715         if (wdev->cac_started)
6716                 return -EBUSY;
6717
6718         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6719                                             wdev->iftype);
6720         if (err < 0)
6721                 return err;
6722
6723         if (err == 0)
6724                 return -EINVAL;
6725
6726         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6727                 return -EINVAL;
6728
6729         if (!rdev->ops->start_radar_detection)
6730                 return -EOPNOTSUPP;
6731
6732         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6733         if (WARN_ON(!cac_time_ms))
6734                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6735
6736         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6737         if (!err) {
6738                 wdev->chandef = chandef;
6739                 wdev->cac_started = true;
6740                 wdev->cac_start_time = jiffies;
6741                 wdev->cac_time_ms = cac_time_ms;
6742         }
6743         return err;
6744 }
6745
6746 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6747 {
6748         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6749         struct net_device *dev = info->user_ptr[1];
6750         struct wireless_dev *wdev = dev->ieee80211_ptr;
6751         struct cfg80211_csa_settings params;
6752         /* csa_attrs is defined static to avoid waste of stack size - this
6753          * function is called under RTNL lock, so this should not be a problem.
6754          */
6755         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6756         int err;
6757         bool need_new_beacon = false;
6758         int len, i;
6759         u32 cs_count;
6760
6761         if (!rdev->ops->channel_switch ||
6762             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6763                 return -EOPNOTSUPP;
6764
6765         switch (dev->ieee80211_ptr->iftype) {
6766         case NL80211_IFTYPE_AP:
6767         case NL80211_IFTYPE_P2P_GO:
6768                 need_new_beacon = true;
6769
6770                 /* useless if AP is not running */
6771                 if (!wdev->beacon_interval)
6772                         return -ENOTCONN;
6773                 break;
6774         case NL80211_IFTYPE_ADHOC:
6775                 if (!wdev->ssid_len)
6776                         return -ENOTCONN;
6777                 break;
6778         case NL80211_IFTYPE_MESH_POINT:
6779                 if (!wdev->mesh_id_len)
6780                         return -ENOTCONN;
6781                 break;
6782         default:
6783                 return -EOPNOTSUPP;
6784         }
6785
6786         memset(&params, 0, sizeof(params));
6787
6788         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6789             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6790                 return -EINVAL;
6791
6792         /* only important for AP, IBSS and mesh create IEs internally */
6793         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6794                 return -EINVAL;
6795
6796         /* Even though the attribute is u32, the specification says
6797          * u8, so let's make sure we don't overflow.
6798          */
6799         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6800         if (cs_count > 255)
6801                 return -EINVAL;
6802
6803         params.count = cs_count;
6804
6805         if (!need_new_beacon)
6806                 goto skip_beacons;
6807
6808         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6809         if (err)
6810                 return err;
6811
6812         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6813                                info->attrs[NL80211_ATTR_CSA_IES],
6814                                nl80211_policy);
6815         if (err)
6816                 return err;
6817
6818         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6819         if (err)
6820                 return err;
6821
6822         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6823                 return -EINVAL;
6824
6825         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6826         if (!len || (len % sizeof(u16)))
6827                 return -EINVAL;
6828
6829         params.n_counter_offsets_beacon = len / sizeof(u16);
6830         if (rdev->wiphy.max_num_csa_counters &&
6831             (params.n_counter_offsets_beacon >
6832              rdev->wiphy.max_num_csa_counters))
6833                 return -EINVAL;
6834
6835         params.counter_offsets_beacon =
6836                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6837
6838         /* sanity checks - counters should fit and be the same */
6839         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6840                 u16 offset = params.counter_offsets_beacon[i];
6841
6842                 if (offset >= params.beacon_csa.tail_len)
6843                         return -EINVAL;
6844
6845                 if (params.beacon_csa.tail[offset] != params.count)
6846                         return -EINVAL;
6847         }
6848
6849         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6850                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6851                 if (!len || (len % sizeof(u16)))
6852                         return -EINVAL;
6853
6854                 params.n_counter_offsets_presp = len / sizeof(u16);
6855                 if (rdev->wiphy.max_num_csa_counters &&
6856                     (params.n_counter_offsets_beacon >
6857                      rdev->wiphy.max_num_csa_counters))
6858                         return -EINVAL;
6859
6860                 params.counter_offsets_presp =
6861                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6862
6863                 /* sanity checks - counters should fit and be the same */
6864                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6865                         u16 offset = params.counter_offsets_presp[i];
6866
6867                         if (offset >= params.beacon_csa.probe_resp_len)
6868                                 return -EINVAL;
6869
6870                         if (params.beacon_csa.probe_resp[offset] !=
6871                             params.count)
6872                                 return -EINVAL;
6873                 }
6874         }
6875
6876 skip_beacons:
6877         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6878         if (err)
6879                 return err;
6880
6881         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6882                                            wdev->iftype))
6883                 return -EINVAL;
6884
6885         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6886                                             &params.chandef,
6887                                             wdev->iftype);
6888         if (err < 0)
6889                 return err;
6890
6891         if (err > 0)
6892                 params.radar_required = true;
6893
6894         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6895                 params.block_tx = true;
6896
6897         wdev_lock(wdev);
6898         err = rdev_channel_switch(rdev, dev, &params);
6899         wdev_unlock(wdev);
6900
6901         return err;
6902 }
6903
6904 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6905                             u32 seq, int flags,
6906                             struct cfg80211_registered_device *rdev,
6907                             struct wireless_dev *wdev,
6908                             struct cfg80211_internal_bss *intbss)
6909 {
6910         struct cfg80211_bss *res = &intbss->pub;
6911         const struct cfg80211_bss_ies *ies;
6912         void *hdr;
6913         struct nlattr *bss;
6914
6915         ASSERT_WDEV_LOCK(wdev);
6916
6917         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6918                              NL80211_CMD_NEW_SCAN_RESULTS);
6919         if (!hdr)
6920                 return -1;
6921
6922         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6923
6924         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6925                 goto nla_put_failure;
6926         if (wdev->netdev &&
6927             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6928                 goto nla_put_failure;
6929         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
6930                               NL80211_ATTR_PAD))
6931                 goto nla_put_failure;
6932
6933         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6934         if (!bss)
6935                 goto nla_put_failure;
6936         if ((!is_zero_ether_addr(res->bssid) &&
6937              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6938                 goto nla_put_failure;
6939
6940         rcu_read_lock();
6941         /* indicate whether we have probe response data or not */
6942         if (rcu_access_pointer(res->proberesp_ies) &&
6943             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6944                 goto fail_unlock_rcu;
6945
6946         /* this pointer prefers to be pointed to probe response data
6947          * but is always valid
6948          */
6949         ies = rcu_dereference(res->ies);
6950         if (ies) {
6951                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
6952                                       NL80211_BSS_PAD))
6953                         goto fail_unlock_rcu;
6954                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6955                                         ies->len, ies->data))
6956                         goto fail_unlock_rcu;
6957         }
6958
6959         /* and this pointer is always (unless driver didn't know) beacon data */
6960         ies = rcu_dereference(res->beacon_ies);
6961         if (ies && ies->from_beacon) {
6962                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
6963                                       NL80211_BSS_PAD))
6964                         goto fail_unlock_rcu;
6965                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6966                                         ies->len, ies->data))
6967                         goto fail_unlock_rcu;
6968         }
6969         rcu_read_unlock();
6970
6971         if (res->beacon_interval &&
6972             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6973                 goto nla_put_failure;
6974         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6975             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6976             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6977             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6978                         jiffies_to_msecs(jiffies - intbss->ts)))
6979                 goto nla_put_failure;
6980
6981         if (intbss->ts_boottime &&
6982             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6983                               intbss->ts_boottime, NL80211_BSS_PAD))
6984                 goto nla_put_failure;
6985
6986         switch (rdev->wiphy.signal_type) {
6987         case CFG80211_SIGNAL_TYPE_MBM:
6988                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6989                         goto nla_put_failure;
6990                 break;
6991         case CFG80211_SIGNAL_TYPE_UNSPEC:
6992                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6993                         goto nla_put_failure;
6994                 break;
6995         default:
6996                 break;
6997         }
6998
6999         switch (wdev->iftype) {
7000         case NL80211_IFTYPE_P2P_CLIENT:
7001         case NL80211_IFTYPE_STATION:
7002                 if (intbss == wdev->current_bss &&
7003                     nla_put_u32(msg, NL80211_BSS_STATUS,
7004                                 NL80211_BSS_STATUS_ASSOCIATED))
7005                         goto nla_put_failure;
7006                 break;
7007         case NL80211_IFTYPE_ADHOC:
7008                 if (intbss == wdev->current_bss &&
7009                     nla_put_u32(msg, NL80211_BSS_STATUS,
7010                                 NL80211_BSS_STATUS_IBSS_JOINED))
7011                         goto nla_put_failure;
7012                 break;
7013         default:
7014                 break;
7015         }
7016
7017         nla_nest_end(msg, bss);
7018
7019         genlmsg_end(msg, hdr);
7020         return 0;
7021
7022  fail_unlock_rcu:
7023         rcu_read_unlock();
7024  nla_put_failure:
7025         genlmsg_cancel(msg, hdr);
7026         return -EMSGSIZE;
7027 }
7028
7029 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7030 {
7031         struct cfg80211_registered_device *rdev;
7032         struct cfg80211_internal_bss *scan;
7033         struct wireless_dev *wdev;
7034         int start = cb->args[2], idx = 0;
7035         int err;
7036
7037         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7038         if (err)
7039                 return err;
7040
7041         wdev_lock(wdev);
7042         spin_lock_bh(&rdev->bss_lock);
7043         cfg80211_bss_expire(rdev);
7044
7045         cb->seq = rdev->bss_generation;
7046
7047         list_for_each_entry(scan, &rdev->bss_list, list) {
7048                 if (++idx <= start)
7049                         continue;
7050                 if (nl80211_send_bss(skb, cb,
7051                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7052                                 rdev, wdev, scan) < 0) {
7053                         idx--;
7054                         break;
7055                 }
7056         }
7057
7058         spin_unlock_bh(&rdev->bss_lock);
7059         wdev_unlock(wdev);
7060
7061         cb->args[2] = idx;
7062         nl80211_finish_wdev_dump(rdev);
7063
7064         return skb->len;
7065 }
7066
7067 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7068                                int flags, struct net_device *dev,
7069                                bool allow_radio_stats,
7070                                struct survey_info *survey)
7071 {
7072         void *hdr;
7073         struct nlattr *infoattr;
7074
7075         /* skip radio stats if userspace didn't request them */
7076         if (!survey->channel && !allow_radio_stats)
7077                 return 0;
7078
7079         hdr = nl80211hdr_put(msg, portid, seq, flags,
7080                              NL80211_CMD_NEW_SURVEY_RESULTS);
7081         if (!hdr)
7082                 return -ENOMEM;
7083
7084         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7085                 goto nla_put_failure;
7086
7087         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7088         if (!infoattr)
7089                 goto nla_put_failure;
7090
7091         if (survey->channel &&
7092             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7093                         survey->channel->center_freq))
7094                 goto nla_put_failure;
7095
7096         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7097             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7098                 goto nla_put_failure;
7099         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7100             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7101                 goto nla_put_failure;
7102         if ((survey->filled & SURVEY_INFO_TIME) &&
7103             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7104                         survey->time, NL80211_SURVEY_INFO_PAD))
7105                 goto nla_put_failure;
7106         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7107             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7108                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7109                 goto nla_put_failure;
7110         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7111             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7112                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7113                 goto nla_put_failure;
7114         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7115             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7116                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7117                 goto nla_put_failure;
7118         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7119             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7120                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7121                 goto nla_put_failure;
7122         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7123             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7124                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7125                 goto nla_put_failure;
7126
7127         nla_nest_end(msg, infoattr);
7128
7129         genlmsg_end(msg, hdr);
7130         return 0;
7131
7132  nla_put_failure:
7133         genlmsg_cancel(msg, hdr);
7134         return -EMSGSIZE;
7135 }
7136
7137 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7138 {
7139         struct survey_info survey;
7140         struct cfg80211_registered_device *rdev;
7141         struct wireless_dev *wdev;
7142         int survey_idx = cb->args[2];
7143         int res;
7144         bool radio_stats;
7145
7146         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7147         if (res)
7148                 return res;
7149
7150         /* prepare_wdev_dump parsed the attributes */
7151         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7152
7153         if (!wdev->netdev) {
7154                 res = -EINVAL;
7155                 goto out_err;
7156         }
7157
7158         if (!rdev->ops->dump_survey) {
7159                 res = -EOPNOTSUPP;
7160                 goto out_err;
7161         }
7162
7163         while (1) {
7164                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7165                 if (res == -ENOENT)
7166                         break;
7167                 if (res)
7168                         goto out_err;
7169
7170                 /* don't send disabled channels, but do send non-channel data */
7171                 if (survey.channel &&
7172                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7173                         survey_idx++;
7174                         continue;
7175                 }
7176
7177                 if (nl80211_send_survey(skb,
7178                                 NETLINK_CB(cb->skb).portid,
7179                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7180                                 wdev->netdev, radio_stats, &survey) < 0)
7181                         goto out;
7182                 survey_idx++;
7183         }
7184
7185  out:
7186         cb->args[2] = survey_idx;
7187         res = skb->len;
7188  out_err:
7189         nl80211_finish_wdev_dump(rdev);
7190         return res;
7191 }
7192
7193 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7194 {
7195         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7196                                   NL80211_WPA_VERSION_2));
7197 }
7198
7199 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7200 {
7201         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7202         struct net_device *dev = info->user_ptr[1];
7203         struct ieee80211_channel *chan;
7204         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7205         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7206         enum nl80211_auth_type auth_type;
7207         struct key_parse key;
7208         bool local_state_change;
7209
7210         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7211                 return -EINVAL;
7212
7213         if (!info->attrs[NL80211_ATTR_MAC])
7214                 return -EINVAL;
7215
7216         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7217                 return -EINVAL;
7218
7219         if (!info->attrs[NL80211_ATTR_SSID])
7220                 return -EINVAL;
7221
7222         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7223                 return -EINVAL;
7224
7225         err = nl80211_parse_key(info, &key);
7226         if (err)
7227                 return err;
7228
7229         if (key.idx >= 0) {
7230                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7231                         return -EINVAL;
7232                 if (!key.p.key || !key.p.key_len)
7233                         return -EINVAL;
7234                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7235                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7236                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7237                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7238                         return -EINVAL;
7239                 if (key.idx > 4)
7240                         return -EINVAL;
7241         } else {
7242                 key.p.key_len = 0;
7243                 key.p.key = NULL;
7244         }
7245
7246         if (key.idx >= 0) {
7247                 int i;
7248                 bool ok = false;
7249
7250                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7251                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7252                                 ok = true;
7253                                 break;
7254                         }
7255                 }
7256                 if (!ok)
7257                         return -EINVAL;
7258         }
7259
7260         if (!rdev->ops->auth)
7261                 return -EOPNOTSUPP;
7262
7263         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7264             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7265                 return -EOPNOTSUPP;
7266
7267         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7268         chan = nl80211_get_valid_chan(&rdev->wiphy,
7269                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7270         if (!chan)
7271                 return -EINVAL;
7272
7273         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7274         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7275
7276         if (info->attrs[NL80211_ATTR_IE]) {
7277                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7278                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7279         }
7280
7281         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7282         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7283                 return -EINVAL;
7284
7285         if (auth_type == NL80211_AUTHTYPE_SAE &&
7286             !info->attrs[NL80211_ATTR_SAE_DATA])
7287                 return -EINVAL;
7288
7289         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7290                 if (auth_type != NL80211_AUTHTYPE_SAE)
7291                         return -EINVAL;
7292                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7293                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7294                 /* need to include at least Auth Transaction and Status Code */
7295                 if (sae_data_len < 4)
7296                         return -EINVAL;
7297         }
7298
7299         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7300
7301         /*
7302          * Since we no longer track auth state, ignore
7303          * requests to only change local state.
7304          */
7305         if (local_state_change)
7306                 return 0;
7307
7308         wdev_lock(dev->ieee80211_ptr);
7309         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7310                                  ssid, ssid_len, ie, ie_len,
7311                                  key.p.key, key.p.key_len, key.idx,
7312                                  sae_data, sae_data_len);
7313         wdev_unlock(dev->ieee80211_ptr);
7314         return err;
7315 }
7316
7317 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7318                                    struct genl_info *info,
7319                                    struct cfg80211_crypto_settings *settings,
7320                                    int cipher_limit)
7321 {
7322         memset(settings, 0, sizeof(*settings));
7323
7324         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7325
7326         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7327                 u16 proto;
7328
7329                 proto = nla_get_u16(
7330                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7331                 settings->control_port_ethertype = cpu_to_be16(proto);
7332                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7333                     proto != ETH_P_PAE)
7334                         return -EINVAL;
7335                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7336                         settings->control_port_no_encrypt = true;
7337         } else
7338                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7339
7340         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7341                 void *data;
7342                 int len, i;
7343
7344                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7345                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7346                 settings->n_ciphers_pairwise = len / sizeof(u32);
7347
7348                 if (len % sizeof(u32))
7349                         return -EINVAL;
7350
7351                 if (settings->n_ciphers_pairwise > cipher_limit)
7352                         return -EINVAL;
7353
7354                 memcpy(settings->ciphers_pairwise, data, len);
7355
7356                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7357                         if (!cfg80211_supported_cipher_suite(
7358                                         &rdev->wiphy,
7359                                         settings->ciphers_pairwise[i]))
7360                                 return -EINVAL;
7361         }
7362
7363         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7364                 settings->cipher_group =
7365                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7366                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7367                                                      settings->cipher_group))
7368                         return -EINVAL;
7369         }
7370
7371         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7372                 settings->wpa_versions =
7373                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7374                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7375                         return -EINVAL;
7376         }
7377
7378         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7379                 void *data;
7380                 int len;
7381
7382                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7383                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7384                 settings->n_akm_suites = len / sizeof(u32);
7385
7386                 if (len % sizeof(u32))
7387                         return -EINVAL;
7388
7389                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7390                         return -EINVAL;
7391
7392                 memcpy(settings->akm_suites, data, len);
7393         }
7394
7395         return 0;
7396 }
7397
7398 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7399 {
7400         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7401         struct net_device *dev = info->user_ptr[1];
7402         struct ieee80211_channel *chan;
7403         struct cfg80211_assoc_request req = {};
7404         const u8 *bssid, *ssid;
7405         int err, ssid_len = 0;
7406
7407         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7408                 return -EINVAL;
7409
7410         if (!info->attrs[NL80211_ATTR_MAC] ||
7411             !info->attrs[NL80211_ATTR_SSID] ||
7412             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7413                 return -EINVAL;
7414
7415         if (!rdev->ops->assoc)
7416                 return -EOPNOTSUPP;
7417
7418         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7419             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7420                 return -EOPNOTSUPP;
7421
7422         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7423
7424         chan = nl80211_get_valid_chan(&rdev->wiphy,
7425                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7426         if (!chan)
7427                 return -EINVAL;
7428
7429         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7430         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7431
7432         if (info->attrs[NL80211_ATTR_IE]) {
7433                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7434                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7435         }
7436
7437         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7438                 enum nl80211_mfp mfp =
7439                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7440                 if (mfp == NL80211_MFP_REQUIRED)
7441                         req.use_mfp = true;
7442                 else if (mfp != NL80211_MFP_NO)
7443                         return -EINVAL;
7444         }
7445
7446         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7447                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7448
7449         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7450                 req.flags |= ASSOC_REQ_DISABLE_HT;
7451
7452         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7453                 memcpy(&req.ht_capa_mask,
7454                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7455                        sizeof(req.ht_capa_mask));
7456
7457         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7458                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7459                         return -EINVAL;
7460                 memcpy(&req.ht_capa,
7461                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7462                        sizeof(req.ht_capa));
7463         }
7464
7465         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7466                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7467
7468         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7469                 memcpy(&req.vht_capa_mask,
7470                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7471                        sizeof(req.vht_capa_mask));
7472
7473         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7474                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7475                         return -EINVAL;
7476                 memcpy(&req.vht_capa,
7477                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7478                        sizeof(req.vht_capa));
7479         }
7480
7481         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7482                 if (!((rdev->wiphy.features &
7483                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7484                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7485                     !wiphy_ext_feature_isset(&rdev->wiphy,
7486                                              NL80211_EXT_FEATURE_RRM))
7487                         return -EINVAL;
7488                 req.flags |= ASSOC_REQ_USE_RRM;
7489         }
7490
7491         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7492         if (!err) {
7493                 wdev_lock(dev->ieee80211_ptr);
7494                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7495                                           ssid, ssid_len, &req);
7496                 wdev_unlock(dev->ieee80211_ptr);
7497         }
7498
7499         return err;
7500 }
7501
7502 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7503 {
7504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7505         struct net_device *dev = info->user_ptr[1];
7506         const u8 *ie = NULL, *bssid;
7507         int ie_len = 0, err;
7508         u16 reason_code;
7509         bool local_state_change;
7510
7511         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7512                 return -EINVAL;
7513
7514         if (!info->attrs[NL80211_ATTR_MAC])
7515                 return -EINVAL;
7516
7517         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7518                 return -EINVAL;
7519
7520         if (!rdev->ops->deauth)
7521                 return -EOPNOTSUPP;
7522
7523         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7524             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7525                 return -EOPNOTSUPP;
7526
7527         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7528
7529         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7530         if (reason_code == 0) {
7531                 /* Reason Code 0 is reserved */
7532                 return -EINVAL;
7533         }
7534
7535         if (info->attrs[NL80211_ATTR_IE]) {
7536                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7537                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7538         }
7539
7540         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7541
7542         wdev_lock(dev->ieee80211_ptr);
7543         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7544                                    local_state_change);
7545         wdev_unlock(dev->ieee80211_ptr);
7546         return err;
7547 }
7548
7549 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7550 {
7551         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7552         struct net_device *dev = info->user_ptr[1];
7553         const u8 *ie = NULL, *bssid;
7554         int ie_len = 0, err;
7555         u16 reason_code;
7556         bool local_state_change;
7557
7558         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7559                 return -EINVAL;
7560
7561         if (!info->attrs[NL80211_ATTR_MAC])
7562                 return -EINVAL;
7563
7564         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7565                 return -EINVAL;
7566
7567         if (!rdev->ops->disassoc)
7568                 return -EOPNOTSUPP;
7569
7570         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7571             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7572                 return -EOPNOTSUPP;
7573
7574         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7575
7576         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7577         if (reason_code == 0) {
7578                 /* Reason Code 0 is reserved */
7579                 return -EINVAL;
7580         }
7581
7582         if (info->attrs[NL80211_ATTR_IE]) {
7583                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7584                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7585         }
7586
7587         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7588
7589         wdev_lock(dev->ieee80211_ptr);
7590         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7591                                      local_state_change);
7592         wdev_unlock(dev->ieee80211_ptr);
7593         return err;
7594 }
7595
7596 static bool
7597 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7598                          int mcast_rate[NUM_NL80211_BANDS],
7599                          int rateval)
7600 {
7601         struct wiphy *wiphy = &rdev->wiphy;
7602         bool found = false;
7603         int band, i;
7604
7605         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7606                 struct ieee80211_supported_band *sband;
7607
7608                 sband = wiphy->bands[band];
7609                 if (!sband)
7610                         continue;
7611
7612                 for (i = 0; i < sband->n_bitrates; i++) {
7613                         if (sband->bitrates[i].bitrate == rateval) {
7614                                 mcast_rate[band] = i + 1;
7615                                 found = true;
7616                                 break;
7617                         }
7618                 }
7619         }
7620
7621         return found;
7622 }
7623
7624 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7625 {
7626         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7627         struct net_device *dev = info->user_ptr[1];
7628         struct cfg80211_ibss_params ibss;
7629         struct wiphy *wiphy;
7630         struct cfg80211_cached_keys *connkeys = NULL;
7631         int err;
7632
7633         memset(&ibss, 0, sizeof(ibss));
7634
7635         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7636                 return -EINVAL;
7637
7638         if (!info->attrs[NL80211_ATTR_SSID] ||
7639             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7640                 return -EINVAL;
7641
7642         ibss.beacon_interval = 100;
7643
7644         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7645                 ibss.beacon_interval =
7646                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7647                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7648                         return -EINVAL;
7649         }
7650
7651         if (!rdev->ops->join_ibss)
7652                 return -EOPNOTSUPP;
7653
7654         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7655                 return -EOPNOTSUPP;
7656
7657         wiphy = &rdev->wiphy;
7658
7659         if (info->attrs[NL80211_ATTR_MAC]) {
7660                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7661
7662                 if (!is_valid_ether_addr(ibss.bssid))
7663                         return -EINVAL;
7664         }
7665         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7666         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7667
7668         if (info->attrs[NL80211_ATTR_IE]) {
7669                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7670                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7671         }
7672
7673         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7674         if (err)
7675                 return err;
7676
7677         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7678                                      NL80211_IFTYPE_ADHOC))
7679                 return -EINVAL;
7680
7681         switch (ibss.chandef.width) {
7682         case NL80211_CHAN_WIDTH_5:
7683         case NL80211_CHAN_WIDTH_10:
7684         case NL80211_CHAN_WIDTH_20_NOHT:
7685                 break;
7686         case NL80211_CHAN_WIDTH_20:
7687         case NL80211_CHAN_WIDTH_40:
7688                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7689                         return -EINVAL;
7690                 break;
7691         case NL80211_CHAN_WIDTH_80:
7692         case NL80211_CHAN_WIDTH_80P80:
7693         case NL80211_CHAN_WIDTH_160:
7694                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7695                         return -EINVAL;
7696                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7697                                              NL80211_EXT_FEATURE_VHT_IBSS))
7698                         return -EINVAL;
7699                 break;
7700         default:
7701                 return -EINVAL;
7702         }
7703
7704         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7705         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7706
7707         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7708                 u8 *rates =
7709                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7710                 int n_rates =
7711                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7712                 struct ieee80211_supported_band *sband =
7713                         wiphy->bands[ibss.chandef.chan->band];
7714
7715                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7716                                              &ibss.basic_rates);
7717                 if (err)
7718                         return err;
7719         }
7720
7721         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7722                 memcpy(&ibss.ht_capa_mask,
7723                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7724                        sizeof(ibss.ht_capa_mask));
7725
7726         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7727                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7728                         return -EINVAL;
7729                 memcpy(&ibss.ht_capa,
7730                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7731                        sizeof(ibss.ht_capa));
7732         }
7733
7734         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7735             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7736                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7737                 return -EINVAL;
7738
7739         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7740                 bool no_ht = false;
7741
7742                 connkeys = nl80211_parse_connkeys(rdev,
7743                                           info->attrs[NL80211_ATTR_KEYS],
7744                                           &no_ht);
7745                 if (IS_ERR(connkeys))
7746                         return PTR_ERR(connkeys);
7747
7748                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7749                     no_ht) {
7750                         kzfree(connkeys);
7751                         return -EINVAL;
7752                 }
7753         }
7754
7755         ibss.control_port =
7756                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7757
7758         ibss.userspace_handles_dfs =
7759                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7760
7761         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7762         if (err)
7763                 kzfree(connkeys);
7764         return err;
7765 }
7766
7767 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7768 {
7769         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7770         struct net_device *dev = info->user_ptr[1];
7771
7772         if (!rdev->ops->leave_ibss)
7773                 return -EOPNOTSUPP;
7774
7775         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7776                 return -EOPNOTSUPP;
7777
7778         return cfg80211_leave_ibss(rdev, dev, false);
7779 }
7780
7781 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7782 {
7783         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7784         struct net_device *dev = info->user_ptr[1];
7785         int mcast_rate[NUM_NL80211_BANDS];
7786         u32 nla_rate;
7787         int err;
7788
7789         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7790             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7791             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7792                 return -EOPNOTSUPP;
7793
7794         if (!rdev->ops->set_mcast_rate)
7795                 return -EOPNOTSUPP;
7796
7797         memset(mcast_rate, 0, sizeof(mcast_rate));
7798
7799         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7800                 return -EINVAL;
7801
7802         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7803         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7804                 return -EINVAL;
7805
7806         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7807
7808         return err;
7809 }
7810
7811 static struct sk_buff *
7812 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7813                             struct wireless_dev *wdev, int approxlen,
7814                             u32 portid, u32 seq, enum nl80211_commands cmd,
7815                             enum nl80211_attrs attr,
7816                             const struct nl80211_vendor_cmd_info *info,
7817                             gfp_t gfp)
7818 {
7819         struct sk_buff *skb;
7820         void *hdr;
7821         struct nlattr *data;
7822
7823         skb = nlmsg_new(approxlen + 100, gfp);
7824         if (!skb)
7825                 return NULL;
7826
7827         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7828         if (!hdr) {
7829                 kfree_skb(skb);
7830                 return NULL;
7831         }
7832
7833         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7834                 goto nla_put_failure;
7835
7836         if (info) {
7837                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7838                                 info->vendor_id))
7839                         goto nla_put_failure;
7840                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7841                                 info->subcmd))
7842                         goto nla_put_failure;
7843         }
7844
7845         if (wdev) {
7846                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
7847                                       wdev_id(wdev), NL80211_ATTR_PAD))
7848                         goto nla_put_failure;
7849                 if (wdev->netdev &&
7850                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7851                                 wdev->netdev->ifindex))
7852                         goto nla_put_failure;
7853         }
7854
7855         data = nla_nest_start(skb, attr);
7856
7857         ((void **)skb->cb)[0] = rdev;
7858         ((void **)skb->cb)[1] = hdr;
7859         ((void **)skb->cb)[2] = data;
7860
7861         return skb;
7862
7863  nla_put_failure:
7864         kfree_skb(skb);
7865         return NULL;
7866 }
7867
7868 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7869                                            struct wireless_dev *wdev,
7870                                            enum nl80211_commands cmd,
7871                                            enum nl80211_attrs attr,
7872                                            int vendor_event_idx,
7873                                            int approxlen, gfp_t gfp)
7874 {
7875         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7876         const struct nl80211_vendor_cmd_info *info;
7877
7878         switch (cmd) {
7879         case NL80211_CMD_TESTMODE:
7880                 if (WARN_ON(vendor_event_idx != -1))
7881                         return NULL;
7882                 info = NULL;
7883                 break;
7884         case NL80211_CMD_VENDOR:
7885                 if (WARN_ON(vendor_event_idx < 0 ||
7886                             vendor_event_idx >= wiphy->n_vendor_events))
7887                         return NULL;
7888                 info = &wiphy->vendor_events[vendor_event_idx];
7889                 break;
7890         default:
7891                 WARN_ON(1);
7892                 return NULL;
7893         }
7894
7895         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7896                                            cmd, attr, info, gfp);
7897 }
7898 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7899
7900 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7901 {
7902         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7903         void *hdr = ((void **)skb->cb)[1];
7904         struct nlattr *data = ((void **)skb->cb)[2];
7905         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7906
7907         /* clear CB data for netlink core to own from now on */
7908         memset(skb->cb, 0, sizeof(skb->cb));
7909
7910         nla_nest_end(skb, data);
7911         genlmsg_end(skb, hdr);
7912
7913         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7914                 mcgrp = NL80211_MCGRP_VENDOR;
7915
7916         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7917                                 mcgrp, gfp);
7918 }
7919 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7920
7921 #ifdef CONFIG_NL80211_TESTMODE
7922 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7923 {
7924         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7925         struct wireless_dev *wdev =
7926                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7927         int err;
7928
7929         if (!rdev->ops->testmode_cmd)
7930                 return -EOPNOTSUPP;
7931
7932         if (IS_ERR(wdev)) {
7933                 err = PTR_ERR(wdev);
7934                 if (err != -EINVAL)
7935                         return err;
7936                 wdev = NULL;
7937         } else if (wdev->wiphy != &rdev->wiphy) {
7938                 return -EINVAL;
7939         }
7940
7941         if (!info->attrs[NL80211_ATTR_TESTDATA])
7942                 return -EINVAL;
7943
7944         rdev->cur_cmd_info = info;
7945         err = rdev_testmode_cmd(rdev, wdev,
7946                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7947                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7948         rdev->cur_cmd_info = NULL;
7949
7950         return err;
7951 }
7952
7953 static int nl80211_testmode_dump(struct sk_buff *skb,
7954                                  struct netlink_callback *cb)
7955 {
7956         struct cfg80211_registered_device *rdev;
7957         int err;
7958         long phy_idx;
7959         void *data = NULL;
7960         int data_len = 0;
7961
7962         rtnl_lock();
7963
7964         if (cb->args[0]) {
7965                 /*
7966                  * 0 is a valid index, but not valid for args[0],
7967                  * so we need to offset by 1.
7968                  */
7969                 phy_idx = cb->args[0] - 1;
7970         } else {
7971                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7972                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7973                                   nl80211_policy);
7974                 if (err)
7975                         goto out_err;
7976
7977                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7978                                                   nl80211_fam.attrbuf);
7979                 if (IS_ERR(rdev)) {
7980                         err = PTR_ERR(rdev);
7981                         goto out_err;
7982                 }
7983                 phy_idx = rdev->wiphy_idx;
7984                 rdev = NULL;
7985
7986                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7987                         cb->args[1] =
7988                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7989         }
7990
7991         if (cb->args[1]) {
7992                 data = nla_data((void *)cb->args[1]);
7993                 data_len = nla_len((void *)cb->args[1]);
7994         }
7995
7996         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7997         if (!rdev) {
7998                 err = -ENOENT;
7999                 goto out_err;
8000         }
8001
8002         if (!rdev->ops->testmode_dump) {
8003                 err = -EOPNOTSUPP;
8004                 goto out_err;
8005         }
8006
8007         while (1) {
8008                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8009                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8010                                            NL80211_CMD_TESTMODE);
8011                 struct nlattr *tmdata;
8012
8013                 if (!hdr)
8014                         break;
8015
8016                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8017                         genlmsg_cancel(skb, hdr);
8018                         break;
8019                 }
8020
8021                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8022                 if (!tmdata) {
8023                         genlmsg_cancel(skb, hdr);
8024                         break;
8025                 }
8026                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8027                 nla_nest_end(skb, tmdata);
8028
8029                 if (err == -ENOBUFS || err == -ENOENT) {
8030                         genlmsg_cancel(skb, hdr);
8031                         break;
8032                 } else if (err) {
8033                         genlmsg_cancel(skb, hdr);
8034                         goto out_err;
8035                 }
8036
8037                 genlmsg_end(skb, hdr);
8038         }
8039
8040         err = skb->len;
8041         /* see above */
8042         cb->args[0] = phy_idx + 1;
8043  out_err:
8044         rtnl_unlock();
8045         return err;
8046 }
8047 #endif
8048
8049 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8050 {
8051         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8052         struct net_device *dev = info->user_ptr[1];
8053         struct cfg80211_connect_params connect;
8054         struct wiphy *wiphy;
8055         struct cfg80211_cached_keys *connkeys = NULL;
8056         int err;
8057
8058         memset(&connect, 0, sizeof(connect));
8059
8060         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8061                 return -EINVAL;
8062
8063         if (!info->attrs[NL80211_ATTR_SSID] ||
8064             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8065                 return -EINVAL;
8066
8067         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8068                 connect.auth_type =
8069                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8070                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8071                                              NL80211_CMD_CONNECT))
8072                         return -EINVAL;
8073         } else
8074                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8075
8076         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8077
8078         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8079                                       NL80211_MAX_NR_CIPHER_SUITES);
8080         if (err)
8081                 return err;
8082
8083         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8084             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8085                 return -EOPNOTSUPP;
8086
8087         wiphy = &rdev->wiphy;
8088
8089         connect.bg_scan_period = -1;
8090         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8091                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8092                 connect.bg_scan_period =
8093                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8094         }
8095
8096         if (info->attrs[NL80211_ATTR_MAC])
8097                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8098         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8099                 connect.bssid_hint =
8100                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8101         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8102         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8103
8104         if (info->attrs[NL80211_ATTR_IE]) {
8105                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8106                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8107         }
8108
8109         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8110                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8111                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8112                     connect.mfp != NL80211_MFP_NO)
8113                         return -EINVAL;
8114         } else {
8115                 connect.mfp = NL80211_MFP_NO;
8116         }
8117
8118         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8119                 connect.prev_bssid =
8120                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8121
8122         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8123                 connect.channel = nl80211_get_valid_chan(
8124                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8125                 if (!connect.channel)
8126                         return -EINVAL;
8127         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8128                 connect.channel_hint = nl80211_get_valid_chan(
8129                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8130                 if (!connect.channel_hint)
8131                         return -EINVAL;
8132         }
8133
8134         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8135                 connkeys = nl80211_parse_connkeys(rdev,
8136                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8137                 if (IS_ERR(connkeys))
8138                         return PTR_ERR(connkeys);
8139         }
8140
8141         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8142                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8143
8144         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8145                 memcpy(&connect.ht_capa_mask,
8146                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8147                        sizeof(connect.ht_capa_mask));
8148
8149         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8150                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8151                         kzfree(connkeys);
8152                         return -EINVAL;
8153                 }
8154                 memcpy(&connect.ht_capa,
8155                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8156                        sizeof(connect.ht_capa));
8157         }
8158
8159         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8160                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8161
8162         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8163                 memcpy(&connect.vht_capa_mask,
8164                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8165                        sizeof(connect.vht_capa_mask));
8166
8167         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8168                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8169                         kzfree(connkeys);
8170                         return -EINVAL;
8171                 }
8172                 memcpy(&connect.vht_capa,
8173                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8174                        sizeof(connect.vht_capa));
8175         }
8176
8177         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8178                 if (!((rdev->wiphy.features &
8179                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8180                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8181                     !wiphy_ext_feature_isset(&rdev->wiphy,
8182                                              NL80211_EXT_FEATURE_RRM)) {
8183                         kzfree(connkeys);
8184                         return -EINVAL;
8185                 }
8186                 connect.flags |= ASSOC_REQ_USE_RRM;
8187         }
8188
8189         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8190         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8191                 kzfree(connkeys);
8192                 return -EOPNOTSUPP;
8193         }
8194
8195         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8196                 /* bss selection makes no sense if bssid is set */
8197                 if (connect.bssid) {
8198                         kzfree(connkeys);
8199                         return -EINVAL;
8200                 }
8201
8202                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8203                                        wiphy, &connect.bss_select);
8204                 if (err) {
8205                         kzfree(connkeys);
8206                         return err;
8207                 }
8208         }
8209
8210         wdev_lock(dev->ieee80211_ptr);
8211         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8212                                connect.prev_bssid);
8213         wdev_unlock(dev->ieee80211_ptr);
8214         if (err)
8215                 kzfree(connkeys);
8216         return err;
8217 }
8218
8219 static int nl80211_disconnect(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         u16 reason;
8224         int ret;
8225
8226         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8227                 reason = WLAN_REASON_DEAUTH_LEAVING;
8228         else
8229                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8230
8231         if (reason == 0)
8232                 return -EINVAL;
8233
8234         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8235             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8236                 return -EOPNOTSUPP;
8237
8238         wdev_lock(dev->ieee80211_ptr);
8239         ret = cfg80211_disconnect(rdev, dev, reason, true);
8240         wdev_unlock(dev->ieee80211_ptr);
8241         return ret;
8242 }
8243
8244 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8245 {
8246         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8247         struct net *net;
8248         int err;
8249
8250         if (info->attrs[NL80211_ATTR_PID]) {
8251                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8252
8253                 net = get_net_ns_by_pid(pid);
8254         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8255                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8256
8257                 net = get_net_ns_by_fd(fd);
8258         } else {
8259                 return -EINVAL;
8260         }
8261
8262         if (IS_ERR(net))
8263                 return PTR_ERR(net);
8264
8265         err = 0;
8266
8267         /* check if anything to do */
8268         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8269                 err = cfg80211_switch_netns(rdev, net);
8270
8271         put_net(net);
8272         return err;
8273 }
8274
8275 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8276 {
8277         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8278         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8279                         struct cfg80211_pmksa *pmksa) = NULL;
8280         struct net_device *dev = info->user_ptr[1];
8281         struct cfg80211_pmksa pmksa;
8282
8283         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8284
8285         if (!info->attrs[NL80211_ATTR_MAC])
8286                 return -EINVAL;
8287
8288         if (!info->attrs[NL80211_ATTR_PMKID])
8289                 return -EINVAL;
8290
8291         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8292         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8293
8294         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8295             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8296                 return -EOPNOTSUPP;
8297
8298         switch (info->genlhdr->cmd) {
8299         case NL80211_CMD_SET_PMKSA:
8300                 rdev_ops = rdev->ops->set_pmksa;
8301                 break;
8302         case NL80211_CMD_DEL_PMKSA:
8303                 rdev_ops = rdev->ops->del_pmksa;
8304                 break;
8305         default:
8306                 WARN_ON(1);
8307                 break;
8308         }
8309
8310         if (!rdev_ops)
8311                 return -EOPNOTSUPP;
8312
8313         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8314 }
8315
8316 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8317 {
8318         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8319         struct net_device *dev = info->user_ptr[1];
8320
8321         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8322             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8323                 return -EOPNOTSUPP;
8324
8325         if (!rdev->ops->flush_pmksa)
8326                 return -EOPNOTSUPP;
8327
8328         return rdev_flush_pmksa(rdev, dev);
8329 }
8330
8331 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8332 {
8333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8334         struct net_device *dev = info->user_ptr[1];
8335         u8 action_code, dialog_token;
8336         u32 peer_capability = 0;
8337         u16 status_code;
8338         u8 *peer;
8339         bool initiator;
8340
8341         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8342             !rdev->ops->tdls_mgmt)
8343                 return -EOPNOTSUPP;
8344
8345         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8346             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8347             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8348             !info->attrs[NL80211_ATTR_IE] ||
8349             !info->attrs[NL80211_ATTR_MAC])
8350                 return -EINVAL;
8351
8352         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8353         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8354         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8355         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8356         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8357         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8358                 peer_capability =
8359                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8360
8361         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8362                               dialog_token, status_code, peer_capability,
8363                               initiator,
8364                               nla_data(info->attrs[NL80211_ATTR_IE]),
8365                               nla_len(info->attrs[NL80211_ATTR_IE]));
8366 }
8367
8368 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8369 {
8370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8371         struct net_device *dev = info->user_ptr[1];
8372         enum nl80211_tdls_operation operation;
8373         u8 *peer;
8374
8375         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8376             !rdev->ops->tdls_oper)
8377                 return -EOPNOTSUPP;
8378
8379         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8380             !info->attrs[NL80211_ATTR_MAC])
8381                 return -EINVAL;
8382
8383         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8384         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8385
8386         return rdev_tdls_oper(rdev, dev, peer, operation);
8387 }
8388
8389 static int nl80211_remain_on_channel(struct sk_buff *skb,
8390                                      struct genl_info *info)
8391 {
8392         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8393         struct wireless_dev *wdev = info->user_ptr[1];
8394         struct cfg80211_chan_def chandef;
8395         struct sk_buff *msg;
8396         void *hdr;
8397         u64 cookie;
8398         u32 duration;
8399         int err;
8400
8401         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8402             !info->attrs[NL80211_ATTR_DURATION])
8403                 return -EINVAL;
8404
8405         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8406
8407         if (!rdev->ops->remain_on_channel ||
8408             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8409                 return -EOPNOTSUPP;
8410
8411         /*
8412          * We should be on that channel for at least a minimum amount of
8413          * time (10ms) but no longer than the driver supports.
8414          */
8415         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8416             duration > rdev->wiphy.max_remain_on_channel_duration)
8417                 return -EINVAL;
8418
8419         err = nl80211_parse_chandef(rdev, info, &chandef);
8420         if (err)
8421                 return err;
8422
8423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8424         if (!msg)
8425                 return -ENOMEM;
8426
8427         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8428                              NL80211_CMD_REMAIN_ON_CHANNEL);
8429         if (!hdr) {
8430                 err = -ENOBUFS;
8431                 goto free_msg;
8432         }
8433
8434         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8435                                      duration, &cookie);
8436
8437         if (err)
8438                 goto free_msg;
8439
8440         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8441                               NL80211_ATTR_PAD))
8442                 goto nla_put_failure;
8443
8444         genlmsg_end(msg, hdr);
8445
8446         return genlmsg_reply(msg, info);
8447
8448  nla_put_failure:
8449         err = -ENOBUFS;
8450  free_msg:
8451         nlmsg_free(msg);
8452         return err;
8453 }
8454
8455 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8456                                             struct genl_info *info)
8457 {
8458         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8459         struct wireless_dev *wdev = info->user_ptr[1];
8460         u64 cookie;
8461
8462         if (!info->attrs[NL80211_ATTR_COOKIE])
8463                 return -EINVAL;
8464
8465         if (!rdev->ops->cancel_remain_on_channel)
8466                 return -EOPNOTSUPP;
8467
8468         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8469
8470         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8471 }
8472
8473 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8474                            u8 *rates, u8 rates_len)
8475 {
8476         u8 i;
8477         u32 mask = 0;
8478
8479         for (i = 0; i < rates_len; i++) {
8480                 int rate = (rates[i] & 0x7f) * 5;
8481                 int ridx;
8482
8483                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8484                         struct ieee80211_rate *srate =
8485                                 &sband->bitrates[ridx];
8486                         if (rate == srate->bitrate) {
8487                                 mask |= 1 << ridx;
8488                                 break;
8489                         }
8490                 }
8491                 if (ridx == sband->n_bitrates)
8492                         return 0; /* rate not found */
8493         }
8494
8495         return mask;
8496 }
8497
8498 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8499                                u8 *rates, u8 rates_len,
8500                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8501 {
8502         u8 i;
8503
8504         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8505
8506         for (i = 0; i < rates_len; i++) {
8507                 int ridx, rbit;
8508
8509                 ridx = rates[i] / 8;
8510                 rbit = BIT(rates[i] % 8);
8511
8512                 /* check validity */
8513                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8514                         return false;
8515
8516                 /* check availability */
8517                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8518                         mcs[ridx] |= rbit;
8519                 else
8520                         return false;
8521         }
8522
8523         return true;
8524 }
8525
8526 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8527 {
8528         u16 mcs_mask = 0;
8529
8530         switch (vht_mcs_map) {
8531         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8532                 break;
8533         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8534                 mcs_mask = 0x00FF;
8535                 break;
8536         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8537                 mcs_mask = 0x01FF;
8538                 break;
8539         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8540                 mcs_mask = 0x03FF;
8541                 break;
8542         default:
8543                 break;
8544         }
8545
8546         return mcs_mask;
8547 }
8548
8549 static void vht_build_mcs_mask(u16 vht_mcs_map,
8550                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8551 {
8552         u8 nss;
8553
8554         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8555                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8556                 vht_mcs_map >>= 2;
8557         }
8558 }
8559
8560 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8561                              struct nl80211_txrate_vht *txrate,
8562                              u16 mcs[NL80211_VHT_NSS_MAX])
8563 {
8564         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8565         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8566         u8 i;
8567
8568         if (!sband->vht_cap.vht_supported)
8569                 return false;
8570
8571         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8572
8573         /* Build vht_mcs_mask from VHT capabilities */
8574         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8575
8576         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8577                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8578                         mcs[i] = txrate->mcs[i];
8579                 else
8580                         return false;
8581         }
8582
8583         return true;
8584 }
8585
8586 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8587         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8588                                     .len = NL80211_MAX_SUPP_RATES },
8589         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8590                                 .len = NL80211_MAX_SUPP_HT_RATES },
8591         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8592         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8593 };
8594
8595 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8596                                        struct genl_info *info)
8597 {
8598         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8599         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8600         struct cfg80211_bitrate_mask mask;
8601         int rem, i;
8602         struct net_device *dev = info->user_ptr[1];
8603         struct nlattr *tx_rates;
8604         struct ieee80211_supported_band *sband;
8605         u16 vht_tx_mcs_map;
8606
8607         if (!rdev->ops->set_bitrate_mask)
8608                 return -EOPNOTSUPP;
8609
8610         memset(&mask, 0, sizeof(mask));
8611         /* Default to all rates enabled */
8612         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8613                 sband = rdev->wiphy.bands[i];
8614
8615                 if (!sband)
8616                         continue;
8617
8618                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8619                 memcpy(mask.control[i].ht_mcs,
8620                        sband->ht_cap.mcs.rx_mask,
8621                        sizeof(mask.control[i].ht_mcs));
8622
8623                 if (!sband->vht_cap.vht_supported)
8624                         continue;
8625
8626                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8627                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8628         }
8629
8630         /* if no rates are given set it back to the defaults */
8631         if (!info->attrs[NL80211_ATTR_TX_RATES])
8632                 goto out;
8633
8634         /*
8635          * The nested attribute uses enum nl80211_band as the index. This maps
8636          * directly to the enum nl80211_band values used in cfg80211.
8637          */
8638         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8639         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8640                 enum nl80211_band band = nla_type(tx_rates);
8641                 int err;
8642
8643                 if (band < 0 || band >= NUM_NL80211_BANDS)
8644                         return -EINVAL;
8645                 sband = rdev->wiphy.bands[band];
8646                 if (sband == NULL)
8647                         return -EINVAL;
8648                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8649                                 nla_len(tx_rates), nl80211_txattr_policy);
8650                 if (err)
8651                         return err;
8652                 if (tb[NL80211_TXRATE_LEGACY]) {
8653                         mask.control[band].legacy = rateset_to_mask(
8654                                 sband,
8655                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8656                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8657                         if ((mask.control[band].legacy == 0) &&
8658                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8659                                 return -EINVAL;
8660                 }
8661                 if (tb[NL80211_TXRATE_HT]) {
8662                         if (!ht_rateset_to_mask(
8663                                         sband,
8664                                         nla_data(tb[NL80211_TXRATE_HT]),
8665                                         nla_len(tb[NL80211_TXRATE_HT]),
8666                                         mask.control[band].ht_mcs))
8667                                 return -EINVAL;
8668                 }
8669                 if (tb[NL80211_TXRATE_VHT]) {
8670                         if (!vht_set_mcs_mask(
8671                                         sband,
8672                                         nla_data(tb[NL80211_TXRATE_VHT]),
8673                                         mask.control[band].vht_mcs))
8674                                 return -EINVAL;
8675                 }
8676                 if (tb[NL80211_TXRATE_GI]) {
8677                         mask.control[band].gi =
8678                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8679                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8680                                 return -EINVAL;
8681                 }
8682
8683                 if (mask.control[band].legacy == 0) {
8684                         /* don't allow empty legacy rates if HT or VHT
8685                          * are not even supported.
8686                          */
8687                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8688                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8689                                 return -EINVAL;
8690
8691                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8692                                 if (mask.control[band].ht_mcs[i])
8693                                         goto out;
8694
8695                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8696                                 if (mask.control[band].vht_mcs[i])
8697                                         goto out;
8698
8699                         /* legacy and mcs rates may not be both empty */
8700                         return -EINVAL;
8701                 }
8702         }
8703
8704 out:
8705         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8706 }
8707
8708 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8709 {
8710         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8711         struct wireless_dev *wdev = info->user_ptr[1];
8712         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8713
8714         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8715                 return -EINVAL;
8716
8717         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8718                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8719
8720         switch (wdev->iftype) {
8721         case NL80211_IFTYPE_STATION:
8722         case NL80211_IFTYPE_ADHOC:
8723         case NL80211_IFTYPE_P2P_CLIENT:
8724         case NL80211_IFTYPE_AP:
8725         case NL80211_IFTYPE_AP_VLAN:
8726         case NL80211_IFTYPE_MESH_POINT:
8727         case NL80211_IFTYPE_P2P_GO:
8728         case NL80211_IFTYPE_P2P_DEVICE:
8729                 break;
8730         default:
8731                 return -EOPNOTSUPP;
8732         }
8733
8734         /* not much point in registering if we can't reply */
8735         if (!rdev->ops->mgmt_tx)
8736                 return -EOPNOTSUPP;
8737
8738         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8739                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8740                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8741 }
8742
8743 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8744 {
8745         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8746         struct wireless_dev *wdev = info->user_ptr[1];
8747         struct cfg80211_chan_def chandef;
8748         int err;
8749         void *hdr = NULL;
8750         u64 cookie;
8751         struct sk_buff *msg = NULL;
8752         struct cfg80211_mgmt_tx_params params = {
8753                 .dont_wait_for_ack =
8754                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8755         };
8756
8757         if (!info->attrs[NL80211_ATTR_FRAME])
8758                 return -EINVAL;
8759
8760         if (!rdev->ops->mgmt_tx)
8761                 return -EOPNOTSUPP;
8762
8763         switch (wdev->iftype) {
8764         case NL80211_IFTYPE_P2P_DEVICE:
8765                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8766                         return -EINVAL;
8767         case NL80211_IFTYPE_STATION:
8768         case NL80211_IFTYPE_ADHOC:
8769         case NL80211_IFTYPE_P2P_CLIENT:
8770         case NL80211_IFTYPE_AP:
8771         case NL80211_IFTYPE_AP_VLAN:
8772         case NL80211_IFTYPE_MESH_POINT:
8773         case NL80211_IFTYPE_P2P_GO:
8774                 break;
8775         default:
8776                 return -EOPNOTSUPP;
8777         }
8778
8779         if (info->attrs[NL80211_ATTR_DURATION]) {
8780                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8781                         return -EINVAL;
8782                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8783
8784                 /*
8785                  * We should wait on the channel for at least a minimum amount
8786                  * of time (10ms) but no longer than the driver supports.
8787                  */
8788                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8789                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8790                         return -EINVAL;
8791         }
8792
8793         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8794
8795         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8796                 return -EINVAL;
8797
8798         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8799
8800         /* get the channel if any has been specified, otherwise pass NULL to
8801          * the driver. The latter will use the current one
8802          */
8803         chandef.chan = NULL;
8804         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8805                 err = nl80211_parse_chandef(rdev, info, &chandef);
8806                 if (err)
8807                         return err;
8808         }
8809
8810         if (!chandef.chan && params.offchan)
8811                 return -EINVAL;
8812
8813         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8814         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8815
8816         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8817                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8818                 int i;
8819
8820                 if (len % sizeof(u16))
8821                         return -EINVAL;
8822
8823                 params.n_csa_offsets = len / sizeof(u16);
8824                 params.csa_offsets =
8825                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8826
8827                 /* check that all the offsets fit the frame */
8828                 for (i = 0; i < params.n_csa_offsets; i++) {
8829                         if (params.csa_offsets[i] >= params.len)
8830                                 return -EINVAL;
8831                 }
8832         }
8833
8834         if (!params.dont_wait_for_ack) {
8835                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8836                 if (!msg)
8837                         return -ENOMEM;
8838
8839                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8840                                      NL80211_CMD_FRAME);
8841                 if (!hdr) {
8842                         err = -ENOBUFS;
8843                         goto free_msg;
8844                 }
8845         }
8846
8847         params.chan = chandef.chan;
8848         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8849         if (err)
8850                 goto free_msg;
8851
8852         if (msg) {
8853                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8854                                       NL80211_ATTR_PAD))
8855                         goto nla_put_failure;
8856
8857                 genlmsg_end(msg, hdr);
8858                 return genlmsg_reply(msg, info);
8859         }
8860
8861         return 0;
8862
8863  nla_put_failure:
8864         err = -ENOBUFS;
8865  free_msg:
8866         nlmsg_free(msg);
8867         return err;
8868 }
8869
8870 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8871 {
8872         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8873         struct wireless_dev *wdev = info->user_ptr[1];
8874         u64 cookie;
8875
8876         if (!info->attrs[NL80211_ATTR_COOKIE])
8877                 return -EINVAL;
8878
8879         if (!rdev->ops->mgmt_tx_cancel_wait)
8880                 return -EOPNOTSUPP;
8881
8882         switch (wdev->iftype) {
8883         case NL80211_IFTYPE_STATION:
8884         case NL80211_IFTYPE_ADHOC:
8885         case NL80211_IFTYPE_P2P_CLIENT:
8886         case NL80211_IFTYPE_AP:
8887         case NL80211_IFTYPE_AP_VLAN:
8888         case NL80211_IFTYPE_P2P_GO:
8889         case NL80211_IFTYPE_P2P_DEVICE:
8890                 break;
8891         default:
8892                 return -EOPNOTSUPP;
8893         }
8894
8895         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8896
8897         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8898 }
8899
8900 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8901 {
8902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8903         struct wireless_dev *wdev;
8904         struct net_device *dev = info->user_ptr[1];
8905         u8 ps_state;
8906         bool state;
8907         int err;
8908
8909         if (!info->attrs[NL80211_ATTR_PS_STATE])
8910                 return -EINVAL;
8911
8912         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8913
8914         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8915                 return -EINVAL;
8916
8917         wdev = dev->ieee80211_ptr;
8918
8919         if (!rdev->ops->set_power_mgmt)
8920                 return -EOPNOTSUPP;
8921
8922         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8923
8924         if (state == wdev->ps)
8925                 return 0;
8926
8927         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8928         if (!err)
8929                 wdev->ps = state;
8930         return err;
8931 }
8932
8933 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8934 {
8935         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8936         enum nl80211_ps_state ps_state;
8937         struct wireless_dev *wdev;
8938         struct net_device *dev = info->user_ptr[1];
8939         struct sk_buff *msg;
8940         void *hdr;
8941         int err;
8942
8943         wdev = dev->ieee80211_ptr;
8944
8945         if (!rdev->ops->set_power_mgmt)
8946                 return -EOPNOTSUPP;
8947
8948         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8949         if (!msg)
8950                 return -ENOMEM;
8951
8952         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8953                              NL80211_CMD_GET_POWER_SAVE);
8954         if (!hdr) {
8955                 err = -ENOBUFS;
8956                 goto free_msg;
8957         }
8958
8959         if (wdev->ps)
8960                 ps_state = NL80211_PS_ENABLED;
8961         else
8962                 ps_state = NL80211_PS_DISABLED;
8963
8964         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8965                 goto nla_put_failure;
8966
8967         genlmsg_end(msg, hdr);
8968         return genlmsg_reply(msg, info);
8969
8970  nla_put_failure:
8971         err = -ENOBUFS;
8972  free_msg:
8973         nlmsg_free(msg);
8974         return err;
8975 }
8976
8977 static const struct nla_policy
8978 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8979         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8980         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8981         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8982         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8983         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8984         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8985 };
8986
8987 static int nl80211_set_cqm_txe(struct genl_info *info,
8988                                u32 rate, u32 pkts, u32 intvl)
8989 {
8990         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8991         struct net_device *dev = info->user_ptr[1];
8992         struct wireless_dev *wdev = dev->ieee80211_ptr;
8993
8994         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8995                 return -EINVAL;
8996
8997         if (!rdev->ops->set_cqm_txe_config)
8998                 return -EOPNOTSUPP;
8999
9000         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9001             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9002                 return -EOPNOTSUPP;
9003
9004         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9005 }
9006
9007 static int nl80211_set_cqm_rssi(struct genl_info *info,
9008                                 s32 threshold, u32 hysteresis)
9009 {
9010         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9011         struct net_device *dev = info->user_ptr[1];
9012         struct wireless_dev *wdev = dev->ieee80211_ptr;
9013
9014         if (threshold > 0)
9015                 return -EINVAL;
9016
9017         /* disabling - hysteresis should also be zero then */
9018         if (threshold == 0)
9019                 hysteresis = 0;
9020
9021         if (!rdev->ops->set_cqm_rssi_config)
9022                 return -EOPNOTSUPP;
9023
9024         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9025             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9026                 return -EOPNOTSUPP;
9027
9028         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9029 }
9030
9031 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9032 {
9033         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9034         struct nlattr *cqm;
9035         int err;
9036
9037         cqm = info->attrs[NL80211_ATTR_CQM];
9038         if (!cqm)
9039                 return -EINVAL;
9040
9041         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9042                                nl80211_attr_cqm_policy);
9043         if (err)
9044                 return err;
9045
9046         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9047             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9048                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9049                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9050
9051                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9052         }
9053
9054         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9055             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9056             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9057                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9058                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9059                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9060
9061                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9062         }
9063
9064         return -EINVAL;
9065 }
9066
9067 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9068 {
9069         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9070         struct net_device *dev = info->user_ptr[1];
9071         struct ocb_setup setup = {};
9072         int err;
9073
9074         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9075         if (err)
9076                 return err;
9077
9078         return cfg80211_join_ocb(rdev, dev, &setup);
9079 }
9080
9081 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9082 {
9083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9084         struct net_device *dev = info->user_ptr[1];
9085
9086         return cfg80211_leave_ocb(rdev, dev);
9087 }
9088
9089 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9090 {
9091         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9092         struct net_device *dev = info->user_ptr[1];
9093         struct mesh_config cfg;
9094         struct mesh_setup setup;
9095         int err;
9096
9097         /* start with default */
9098         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9099         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9100
9101         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9102                 /* and parse parameters if given */
9103                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9104                 if (err)
9105                         return err;
9106         }
9107
9108         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9109             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9110                 return -EINVAL;
9111
9112         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9113         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9114
9115         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9116             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9117                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9118                         return -EINVAL;
9119
9120         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9121                 setup.beacon_interval =
9122                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9123                 if (setup.beacon_interval < 10 ||
9124                     setup.beacon_interval > 10000)
9125                         return -EINVAL;
9126         }
9127
9128         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9129                 setup.dtim_period =
9130                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9131                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9132                         return -EINVAL;
9133         }
9134
9135         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9136                 /* parse additional setup parameters if given */
9137                 err = nl80211_parse_mesh_setup(info, &setup);
9138                 if (err)
9139                         return err;
9140         }
9141
9142         if (setup.user_mpm)
9143                 cfg.auto_open_plinks = false;
9144
9145         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9146                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9147                 if (err)
9148                         return err;
9149         } else {
9150                 /* cfg80211_join_mesh() will sort it out */
9151                 setup.chandef.chan = NULL;
9152         }
9153
9154         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9155                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9156                 int n_rates =
9157                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9158                 struct ieee80211_supported_band *sband;
9159
9160                 if (!setup.chandef.chan)
9161                         return -EINVAL;
9162
9163                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9164
9165                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9166                                              &setup.basic_rates);
9167                 if (err)
9168                         return err;
9169         }
9170
9171         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9172 }
9173
9174 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9175 {
9176         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9177         struct net_device *dev = info->user_ptr[1];
9178
9179         return cfg80211_leave_mesh(rdev, dev);
9180 }
9181
9182 #ifdef CONFIG_PM
9183 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9184                                         struct cfg80211_registered_device *rdev)
9185 {
9186         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9187         struct nlattr *nl_pats, *nl_pat;
9188         int i, pat_len;
9189
9190         if (!wowlan->n_patterns)
9191                 return 0;
9192
9193         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9194         if (!nl_pats)
9195                 return -ENOBUFS;
9196
9197         for (i = 0; i < wowlan->n_patterns; i++) {
9198                 nl_pat = nla_nest_start(msg, i + 1);
9199                 if (!nl_pat)
9200                         return -ENOBUFS;
9201                 pat_len = wowlan->patterns[i].pattern_len;
9202                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9203                             wowlan->patterns[i].mask) ||
9204                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9205                             wowlan->patterns[i].pattern) ||
9206                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9207                                 wowlan->patterns[i].pkt_offset))
9208                         return -ENOBUFS;
9209                 nla_nest_end(msg, nl_pat);
9210         }
9211         nla_nest_end(msg, nl_pats);
9212
9213         return 0;
9214 }
9215
9216 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9217                                    struct cfg80211_wowlan_tcp *tcp)
9218 {
9219         struct nlattr *nl_tcp;
9220
9221         if (!tcp)
9222                 return 0;
9223
9224         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9225         if (!nl_tcp)
9226                 return -ENOBUFS;
9227
9228         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9229             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9230             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9231             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9232             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9233             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9234                     tcp->payload_len, tcp->payload) ||
9235             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9236                         tcp->data_interval) ||
9237             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9238                     tcp->wake_len, tcp->wake_data) ||
9239             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9240                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9241                 return -ENOBUFS;
9242
9243         if (tcp->payload_seq.len &&
9244             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9245                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9246                 return -ENOBUFS;
9247
9248         if (tcp->payload_tok.len &&
9249             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9250                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9251                     &tcp->payload_tok))
9252                 return -ENOBUFS;
9253
9254         nla_nest_end(msg, nl_tcp);
9255
9256         return 0;
9257 }
9258
9259 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9260                                   struct cfg80211_sched_scan_request *req)
9261 {
9262         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9263         int i;
9264
9265         if (!req)
9266                 return 0;
9267
9268         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9269         if (!nd)
9270                 return -ENOBUFS;
9271
9272         if (req->n_scan_plans == 1 &&
9273             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9274                         req->scan_plans[0].interval * 1000))
9275                 return -ENOBUFS;
9276
9277         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9278                 return -ENOBUFS;
9279
9280         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9281         if (!freqs)
9282                 return -ENOBUFS;
9283
9284         for (i = 0; i < req->n_channels; i++)
9285                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9286
9287         nla_nest_end(msg, freqs);
9288
9289         if (req->n_match_sets) {
9290                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9291                 for (i = 0; i < req->n_match_sets; i++) {
9292                         match = nla_nest_start(msg, i);
9293                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9294                                 req->match_sets[i].ssid.ssid_len,
9295                                 req->match_sets[i].ssid.ssid);
9296                         nla_nest_end(msg, match);
9297                 }
9298                 nla_nest_end(msg, matches);
9299         }
9300
9301         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9302         if (!scan_plans)
9303                 return -ENOBUFS;
9304
9305         for (i = 0; i < req->n_scan_plans; i++) {
9306                 scan_plan = nla_nest_start(msg, i + 1);
9307                 if (!scan_plan ||
9308                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9309                                 req->scan_plans[i].interval) ||
9310                     (req->scan_plans[i].iterations &&
9311                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9312                                  req->scan_plans[i].iterations)))
9313                         return -ENOBUFS;
9314                 nla_nest_end(msg, scan_plan);
9315         }
9316         nla_nest_end(msg, scan_plans);
9317
9318         nla_nest_end(msg, nd);
9319
9320         return 0;
9321 }
9322
9323 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9324 {
9325         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9326         struct sk_buff *msg;
9327         void *hdr;
9328         u32 size = NLMSG_DEFAULT_SIZE;
9329
9330         if (!rdev->wiphy.wowlan)
9331                 return -EOPNOTSUPP;
9332
9333         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9334                 /* adjust size to have room for all the data */
9335                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9336                         rdev->wiphy.wowlan_config->tcp->payload_len +
9337                         rdev->wiphy.wowlan_config->tcp->wake_len +
9338                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9339         }
9340
9341         msg = nlmsg_new(size, GFP_KERNEL);
9342         if (!msg)
9343                 return -ENOMEM;
9344
9345         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9346                              NL80211_CMD_GET_WOWLAN);
9347         if (!hdr)
9348                 goto nla_put_failure;
9349
9350         if (rdev->wiphy.wowlan_config) {
9351                 struct nlattr *nl_wowlan;
9352
9353                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9354                 if (!nl_wowlan)
9355                         goto nla_put_failure;
9356
9357                 if ((rdev->wiphy.wowlan_config->any &&
9358                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9359                     (rdev->wiphy.wowlan_config->disconnect &&
9360                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9361                     (rdev->wiphy.wowlan_config->magic_pkt &&
9362                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9363                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9364                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9365                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9366                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9367                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9368                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9369                     (rdev->wiphy.wowlan_config->rfkill_release &&
9370                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9371                         goto nla_put_failure;
9372
9373                 if (nl80211_send_wowlan_patterns(msg, rdev))
9374                         goto nla_put_failure;
9375
9376                 if (nl80211_send_wowlan_tcp(msg,
9377                                             rdev->wiphy.wowlan_config->tcp))
9378                         goto nla_put_failure;
9379
9380                 if (nl80211_send_wowlan_nd(
9381                             msg,
9382                             rdev->wiphy.wowlan_config->nd_config))
9383                         goto nla_put_failure;
9384
9385                 nla_nest_end(msg, nl_wowlan);
9386         }
9387
9388         genlmsg_end(msg, hdr);
9389         return genlmsg_reply(msg, info);
9390
9391 nla_put_failure:
9392         nlmsg_free(msg);
9393         return -ENOBUFS;
9394 }
9395
9396 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9397                                     struct nlattr *attr,
9398                                     struct cfg80211_wowlan *trig)
9399 {
9400         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9401         struct cfg80211_wowlan_tcp *cfg;
9402         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9403         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9404         u32 size;
9405         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9406         int err, port;
9407
9408         if (!rdev->wiphy.wowlan->tcp)
9409                 return -EINVAL;
9410
9411         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9412                         nla_data(attr), nla_len(attr),
9413                         nl80211_wowlan_tcp_policy);
9414         if (err)
9415                 return err;
9416
9417         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9418             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9419             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9420             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9421             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9422             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9423             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9424             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9425                 return -EINVAL;
9426
9427         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9428         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9429                 return -EINVAL;
9430
9431         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9432                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9433             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9434                 return -EINVAL;
9435
9436         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9437         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9438                 return -EINVAL;
9439
9440         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9441         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9442                 return -EINVAL;
9443
9444         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9445                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9446
9447                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9448                 tokens_size = tokln - sizeof(*tok);
9449
9450                 if (!tok->len || tokens_size % tok->len)
9451                         return -EINVAL;
9452                 if (!rdev->wiphy.wowlan->tcp->tok)
9453                         return -EINVAL;
9454                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9455                         return -EINVAL;
9456                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9457                         return -EINVAL;
9458                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9459                         return -EINVAL;
9460                 if (tok->offset + tok->len > data_size)
9461                         return -EINVAL;
9462         }
9463
9464         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9465                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9466                 if (!rdev->wiphy.wowlan->tcp->seq)
9467                         return -EINVAL;
9468                 if (seq->len == 0 || seq->len > 4)
9469                         return -EINVAL;
9470                 if (seq->len + seq->offset > data_size)
9471                         return -EINVAL;
9472         }
9473
9474         size = sizeof(*cfg);
9475         size += data_size;
9476         size += wake_size + wake_mask_size;
9477         size += tokens_size;
9478
9479         cfg = kzalloc(size, GFP_KERNEL);
9480         if (!cfg)
9481                 return -ENOMEM;
9482         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9483         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9484         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9485                ETH_ALEN);
9486         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9487                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9488         else
9489                 port = 0;
9490 #ifdef CONFIG_INET
9491         /* allocate a socket and port for it and use it */
9492         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9493                             IPPROTO_TCP, &cfg->sock, 1);
9494         if (err) {
9495                 kfree(cfg);
9496                 return err;
9497         }
9498         if (inet_csk_get_port(cfg->sock->sk, port)) {
9499                 sock_release(cfg->sock);
9500                 kfree(cfg);
9501                 return -EADDRINUSE;
9502         }
9503         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9504 #else
9505         if (!port) {
9506                 kfree(cfg);
9507                 return -EINVAL;
9508         }
9509         cfg->src_port = port;
9510 #endif
9511
9512         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9513         cfg->payload_len = data_size;
9514         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9515         memcpy((void *)cfg->payload,
9516                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9517                data_size);
9518         if (seq)
9519                 cfg->payload_seq = *seq;
9520         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9521         cfg->wake_len = wake_size;
9522         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9523         memcpy((void *)cfg->wake_data,
9524                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9525                wake_size);
9526         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9527                          data_size + wake_size;
9528         memcpy((void *)cfg->wake_mask,
9529                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9530                wake_mask_size);
9531         if (tok) {
9532                 cfg->tokens_size = tokens_size;
9533                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9534         }
9535
9536         trig->tcp = cfg;
9537
9538         return 0;
9539 }
9540
9541 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9542                                    const struct wiphy_wowlan_support *wowlan,
9543                                    struct nlattr *attr,
9544                                    struct cfg80211_wowlan *trig)
9545 {
9546         struct nlattr **tb;
9547         int err;
9548
9549         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9550         if (!tb)
9551                 return -ENOMEM;
9552
9553         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9554                 err = -EOPNOTSUPP;
9555                 goto out;
9556         }
9557
9558         err = nla_parse(tb, NL80211_ATTR_MAX,
9559                         nla_data(attr), nla_len(attr),
9560                         nl80211_policy);
9561         if (err)
9562                 goto out;
9563
9564         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9565         err = PTR_ERR_OR_ZERO(trig->nd_config);
9566         if (err)
9567                 trig->nd_config = NULL;
9568
9569 out:
9570         kfree(tb);
9571         return err;
9572 }
9573
9574 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9575 {
9576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9577         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9578         struct cfg80211_wowlan new_triggers = {};
9579         struct cfg80211_wowlan *ntrig;
9580         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9581         int err, i;
9582         bool prev_enabled = rdev->wiphy.wowlan_config;
9583         bool regular = false;
9584
9585         if (!wowlan)
9586                 return -EOPNOTSUPP;
9587
9588         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9589                 cfg80211_rdev_free_wowlan(rdev);
9590                 rdev->wiphy.wowlan_config = NULL;
9591                 goto set_wakeup;
9592         }
9593
9594         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9595                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9596                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9597                         nl80211_wowlan_policy);
9598         if (err)
9599                 return err;
9600
9601         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9602                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9603                         return -EINVAL;
9604                 new_triggers.any = true;
9605         }
9606
9607         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9608                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9609                         return -EINVAL;
9610                 new_triggers.disconnect = true;
9611                 regular = true;
9612         }
9613
9614         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9615                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9616                         return -EINVAL;
9617                 new_triggers.magic_pkt = true;
9618                 regular = true;
9619         }
9620
9621         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9622                 return -EINVAL;
9623
9624         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9625                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9626                         return -EINVAL;
9627                 new_triggers.gtk_rekey_failure = true;
9628                 regular = true;
9629         }
9630
9631         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9632                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9633                         return -EINVAL;
9634                 new_triggers.eap_identity_req = true;
9635                 regular = true;
9636         }
9637
9638         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9639                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9640                         return -EINVAL;
9641                 new_triggers.four_way_handshake = true;
9642                 regular = true;
9643         }
9644
9645         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9646                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9647                         return -EINVAL;
9648                 new_triggers.rfkill_release = true;
9649                 regular = true;
9650         }
9651
9652         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9653                 struct nlattr *pat;
9654                 int n_patterns = 0;
9655                 int rem, pat_len, mask_len, pkt_offset;
9656                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9657
9658                 regular = true;
9659
9660                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9661                                     rem)
9662                         n_patterns++;
9663                 if (n_patterns > wowlan->n_patterns)
9664                         return -EINVAL;
9665
9666                 new_triggers.patterns = kcalloc(n_patterns,
9667                                                 sizeof(new_triggers.patterns[0]),
9668                                                 GFP_KERNEL);
9669                 if (!new_triggers.patterns)
9670                         return -ENOMEM;
9671
9672                 new_triggers.n_patterns = n_patterns;
9673                 i = 0;
9674
9675                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9676                                     rem) {
9677                         u8 *mask_pat;
9678
9679                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9680                                   nla_len(pat), NULL);
9681                         err = -EINVAL;
9682                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9683                             !pat_tb[NL80211_PKTPAT_PATTERN])
9684                                 goto error;
9685                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9686                         mask_len = DIV_ROUND_UP(pat_len, 8);
9687                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9688                                 goto error;
9689                         if (pat_len > wowlan->pattern_max_len ||
9690                             pat_len < wowlan->pattern_min_len)
9691                                 goto error;
9692
9693                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9694                                 pkt_offset = 0;
9695                         else
9696                                 pkt_offset = nla_get_u32(
9697                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9698                         if (pkt_offset > wowlan->max_pkt_offset)
9699                                 goto error;
9700                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9701
9702                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9703                         if (!mask_pat) {
9704                                 err = -ENOMEM;
9705                                 goto error;
9706                         }
9707                         new_triggers.patterns[i].mask = mask_pat;
9708                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9709                                mask_len);
9710                         mask_pat += mask_len;
9711                         new_triggers.patterns[i].pattern = mask_pat;
9712                         new_triggers.patterns[i].pattern_len = pat_len;
9713                         memcpy(mask_pat,
9714                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9715                                pat_len);
9716                         i++;
9717                 }
9718         }
9719
9720         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9721                 regular = true;
9722                 err = nl80211_parse_wowlan_tcp(
9723                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9724                         &new_triggers);
9725                 if (err)
9726                         goto error;
9727         }
9728
9729         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9730                 regular = true;
9731                 err = nl80211_parse_wowlan_nd(
9732                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9733                         &new_triggers);
9734                 if (err)
9735                         goto error;
9736         }
9737
9738         /* The 'any' trigger means the device continues operating more or less
9739          * as in its normal operation mode and wakes up the host on most of the
9740          * normal interrupts (like packet RX, ...)
9741          * It therefore makes little sense to combine with the more constrained
9742          * wakeup trigger modes.
9743          */
9744         if (new_triggers.any && regular) {
9745                 err = -EINVAL;
9746                 goto error;
9747         }
9748
9749         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9750         if (!ntrig) {
9751                 err = -ENOMEM;
9752                 goto error;
9753         }
9754         cfg80211_rdev_free_wowlan(rdev);
9755         rdev->wiphy.wowlan_config = ntrig;
9756
9757  set_wakeup:
9758         if (rdev->ops->set_wakeup &&
9759             prev_enabled != !!rdev->wiphy.wowlan_config)
9760                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9761
9762         return 0;
9763  error:
9764         for (i = 0; i < new_triggers.n_patterns; i++)
9765                 kfree(new_triggers.patterns[i].mask);
9766         kfree(new_triggers.patterns);
9767         if (new_triggers.tcp && new_triggers.tcp->sock)
9768                 sock_release(new_triggers.tcp->sock);
9769         kfree(new_triggers.tcp);
9770         kfree(new_triggers.nd_config);
9771         return err;
9772 }
9773 #endif
9774
9775 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9776                                        struct cfg80211_registered_device *rdev)
9777 {
9778         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9779         int i, j, pat_len;
9780         struct cfg80211_coalesce_rules *rule;
9781
9782         if (!rdev->coalesce->n_rules)
9783                 return 0;
9784
9785         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9786         if (!nl_rules)
9787                 return -ENOBUFS;
9788
9789         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9790                 nl_rule = nla_nest_start(msg, i + 1);
9791                 if (!nl_rule)
9792                         return -ENOBUFS;
9793
9794                 rule = &rdev->coalesce->rules[i];
9795                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9796                                 rule->delay))
9797                         return -ENOBUFS;
9798
9799                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9800                                 rule->condition))
9801                         return -ENOBUFS;
9802
9803                 nl_pats = nla_nest_start(msg,
9804                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9805                 if (!nl_pats)
9806                         return -ENOBUFS;
9807
9808                 for (j = 0; j < rule->n_patterns; j++) {
9809                         nl_pat = nla_nest_start(msg, j + 1);
9810                         if (!nl_pat)
9811                                 return -ENOBUFS;
9812                         pat_len = rule->patterns[j].pattern_len;
9813                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9814                                     DIV_ROUND_UP(pat_len, 8),
9815                                     rule->patterns[j].mask) ||
9816                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9817                                     rule->patterns[j].pattern) ||
9818                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9819                                         rule->patterns[j].pkt_offset))
9820                                 return -ENOBUFS;
9821                         nla_nest_end(msg, nl_pat);
9822                 }
9823                 nla_nest_end(msg, nl_pats);
9824                 nla_nest_end(msg, nl_rule);
9825         }
9826         nla_nest_end(msg, nl_rules);
9827
9828         return 0;
9829 }
9830
9831 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9832 {
9833         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9834         struct sk_buff *msg;
9835         void *hdr;
9836
9837         if (!rdev->wiphy.coalesce)
9838                 return -EOPNOTSUPP;
9839
9840         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9841         if (!msg)
9842                 return -ENOMEM;
9843
9844         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9845                              NL80211_CMD_GET_COALESCE);
9846         if (!hdr)
9847                 goto nla_put_failure;
9848
9849         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9850                 goto nla_put_failure;
9851
9852         genlmsg_end(msg, hdr);
9853         return genlmsg_reply(msg, info);
9854
9855 nla_put_failure:
9856         nlmsg_free(msg);
9857         return -ENOBUFS;
9858 }
9859
9860 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9861 {
9862         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9863         int i, j;
9864         struct cfg80211_coalesce_rules *rule;
9865
9866         if (!coalesce)
9867                 return;
9868
9869         for (i = 0; i < coalesce->n_rules; i++) {
9870                 rule = &coalesce->rules[i];
9871                 for (j = 0; j < rule->n_patterns; j++)
9872                         kfree(rule->patterns[j].mask);
9873                 kfree(rule->patterns);
9874         }
9875         kfree(coalesce->rules);
9876         kfree(coalesce);
9877         rdev->coalesce = NULL;
9878 }
9879
9880 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9881                                        struct nlattr *rule,
9882                                        struct cfg80211_coalesce_rules *new_rule)
9883 {
9884         int err, i;
9885         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9886         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9887         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9888         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9889
9890         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9891                         nla_len(rule), nl80211_coalesce_policy);
9892         if (err)
9893                 return err;
9894
9895         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9896                 new_rule->delay =
9897                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9898         if (new_rule->delay > coalesce->max_delay)
9899                 return -EINVAL;
9900
9901         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9902                 new_rule->condition =
9903                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9904         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9905             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9906                 return -EINVAL;
9907
9908         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9909                 return -EINVAL;
9910
9911         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9912                             rem)
9913                 n_patterns++;
9914         if (n_patterns > coalesce->n_patterns)
9915                 return -EINVAL;
9916
9917         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9918                                      GFP_KERNEL);
9919         if (!new_rule->patterns)
9920                 return -ENOMEM;
9921
9922         new_rule->n_patterns = n_patterns;
9923         i = 0;
9924
9925         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_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                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9932                     !pat_tb[NL80211_PKTPAT_PATTERN])
9933                         return -EINVAL;
9934                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9935                 mask_len = DIV_ROUND_UP(pat_len, 8);
9936                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9937                         return -EINVAL;
9938                 if (pat_len > coalesce->pattern_max_len ||
9939                     pat_len < coalesce->pattern_min_len)
9940                         return -EINVAL;
9941
9942                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9943                         pkt_offset = 0;
9944                 else
9945                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9946                 if (pkt_offset > coalesce->max_pkt_offset)
9947                         return -EINVAL;
9948                 new_rule->patterns[i].pkt_offset = pkt_offset;
9949
9950                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9951                 if (!mask_pat)
9952                         return -ENOMEM;
9953
9954                 new_rule->patterns[i].mask = mask_pat;
9955                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9956                        mask_len);
9957
9958                 mask_pat += mask_len;
9959                 new_rule->patterns[i].pattern = mask_pat;
9960                 new_rule->patterns[i].pattern_len = pat_len;
9961                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9962                        pat_len);
9963                 i++;
9964         }
9965
9966         return 0;
9967 }
9968
9969 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9970 {
9971         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9972         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9973         struct cfg80211_coalesce new_coalesce = {};
9974         struct cfg80211_coalesce *n_coalesce;
9975         int err, rem_rule, n_rules = 0, i, j;
9976         struct nlattr *rule;
9977         struct cfg80211_coalesce_rules *tmp_rule;
9978
9979         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9980                 return -EOPNOTSUPP;
9981
9982         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9983                 cfg80211_rdev_free_coalesce(rdev);
9984                 rdev_set_coalesce(rdev, NULL);
9985                 return 0;
9986         }
9987
9988         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9989                             rem_rule)
9990                 n_rules++;
9991         if (n_rules > coalesce->n_rules)
9992                 return -EINVAL;
9993
9994         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9995                                      GFP_KERNEL);
9996         if (!new_coalesce.rules)
9997                 return -ENOMEM;
9998
9999         new_coalesce.n_rules = n_rules;
10000         i = 0;
10001
10002         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10003                             rem_rule) {
10004                 err = nl80211_parse_coalesce_rule(rdev, rule,
10005                                                   &new_coalesce.rules[i]);
10006                 if (err)
10007                         goto error;
10008
10009                 i++;
10010         }
10011
10012         err = rdev_set_coalesce(rdev, &new_coalesce);
10013         if (err)
10014                 goto error;
10015
10016         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10017         if (!n_coalesce) {
10018                 err = -ENOMEM;
10019                 goto error;
10020         }
10021         cfg80211_rdev_free_coalesce(rdev);
10022         rdev->coalesce = n_coalesce;
10023
10024         return 0;
10025 error:
10026         for (i = 0; i < new_coalesce.n_rules; i++) {
10027                 tmp_rule = &new_coalesce.rules[i];
10028                 for (j = 0; j < tmp_rule->n_patterns; j++)
10029                         kfree(tmp_rule->patterns[j].mask);
10030                 kfree(tmp_rule->patterns);
10031         }
10032         kfree(new_coalesce.rules);
10033
10034         return err;
10035 }
10036
10037 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10038 {
10039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10040         struct net_device *dev = info->user_ptr[1];
10041         struct wireless_dev *wdev = dev->ieee80211_ptr;
10042         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10043         struct cfg80211_gtk_rekey_data rekey_data;
10044         int err;
10045
10046         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10047                 return -EINVAL;
10048
10049         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10050                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10051                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10052                         nl80211_rekey_policy);
10053         if (err)
10054                 return err;
10055
10056         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10057                 return -ERANGE;
10058         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10059                 return -ERANGE;
10060         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10061                 return -ERANGE;
10062
10063         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10064         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10065         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10066
10067         wdev_lock(wdev);
10068         if (!wdev->current_bss) {
10069                 err = -ENOTCONN;
10070                 goto out;
10071         }
10072
10073         if (!rdev->ops->set_rekey_data) {
10074                 err = -EOPNOTSUPP;
10075                 goto out;
10076         }
10077
10078         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10079  out:
10080         wdev_unlock(wdev);
10081         return err;
10082 }
10083
10084 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10085                                              struct genl_info *info)
10086 {
10087         struct net_device *dev = info->user_ptr[1];
10088         struct wireless_dev *wdev = dev->ieee80211_ptr;
10089
10090         if (wdev->iftype != NL80211_IFTYPE_AP &&
10091             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10092                 return -EINVAL;
10093
10094         if (wdev->ap_unexpected_nlportid)
10095                 return -EBUSY;
10096
10097         wdev->ap_unexpected_nlportid = info->snd_portid;
10098         return 0;
10099 }
10100
10101 static int nl80211_probe_client(struct sk_buff *skb,
10102                                 struct genl_info *info)
10103 {
10104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10105         struct net_device *dev = info->user_ptr[1];
10106         struct wireless_dev *wdev = dev->ieee80211_ptr;
10107         struct sk_buff *msg;
10108         void *hdr;
10109         const u8 *addr;
10110         u64 cookie;
10111         int err;
10112
10113         if (wdev->iftype != NL80211_IFTYPE_AP &&
10114             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10115                 return -EOPNOTSUPP;
10116
10117         if (!info->attrs[NL80211_ATTR_MAC])
10118                 return -EINVAL;
10119
10120         if (!rdev->ops->probe_client)
10121                 return -EOPNOTSUPP;
10122
10123         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10124         if (!msg)
10125                 return -ENOMEM;
10126
10127         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10128                              NL80211_CMD_PROBE_CLIENT);
10129         if (!hdr) {
10130                 err = -ENOBUFS;
10131                 goto free_msg;
10132         }
10133
10134         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10135
10136         err = rdev_probe_client(rdev, dev, addr, &cookie);
10137         if (err)
10138                 goto free_msg;
10139
10140         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10141                               NL80211_ATTR_PAD))
10142                 goto nla_put_failure;
10143
10144         genlmsg_end(msg, hdr);
10145
10146         return genlmsg_reply(msg, info);
10147
10148  nla_put_failure:
10149         err = -ENOBUFS;
10150  free_msg:
10151         nlmsg_free(msg);
10152         return err;
10153 }
10154
10155 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10156 {
10157         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10158         struct cfg80211_beacon_registration *reg, *nreg;
10159         int rv;
10160
10161         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10162                 return -EOPNOTSUPP;
10163
10164         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10165         if (!nreg)
10166                 return -ENOMEM;
10167
10168         /* First, check if already registered. */
10169         spin_lock_bh(&rdev->beacon_registrations_lock);
10170         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10171                 if (reg->nlportid == info->snd_portid) {
10172                         rv = -EALREADY;
10173                         goto out_err;
10174                 }
10175         }
10176         /* Add it to the list */
10177         nreg->nlportid = info->snd_portid;
10178         list_add(&nreg->list, &rdev->beacon_registrations);
10179
10180         spin_unlock_bh(&rdev->beacon_registrations_lock);
10181
10182         return 0;
10183 out_err:
10184         spin_unlock_bh(&rdev->beacon_registrations_lock);
10185         kfree(nreg);
10186         return rv;
10187 }
10188
10189 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10190 {
10191         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10192         struct wireless_dev *wdev = info->user_ptr[1];
10193         int err;
10194
10195         if (!rdev->ops->start_p2p_device)
10196                 return -EOPNOTSUPP;
10197
10198         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10199                 return -EOPNOTSUPP;
10200
10201         if (wdev->p2p_started)
10202                 return 0;
10203
10204         if (rfkill_blocked(rdev->rfkill))
10205                 return -ERFKILL;
10206
10207         err = rdev_start_p2p_device(rdev, wdev);
10208         if (err)
10209                 return err;
10210
10211         wdev->p2p_started = true;
10212         rdev->opencount++;
10213
10214         return 0;
10215 }
10216
10217 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10218 {
10219         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10220         struct wireless_dev *wdev = info->user_ptr[1];
10221
10222         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10223                 return -EOPNOTSUPP;
10224
10225         if (!rdev->ops->stop_p2p_device)
10226                 return -EOPNOTSUPP;
10227
10228         cfg80211_stop_p2p_device(rdev, wdev);
10229
10230         return 0;
10231 }
10232
10233 static int nl80211_get_protocol_features(struct sk_buff *skb,
10234                                          struct genl_info *info)
10235 {
10236         void *hdr;
10237         struct sk_buff *msg;
10238
10239         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10240         if (!msg)
10241                 return -ENOMEM;
10242
10243         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10244                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10245         if (!hdr)
10246                 goto nla_put_failure;
10247
10248         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10249                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10250                 goto nla_put_failure;
10251
10252         genlmsg_end(msg, hdr);
10253         return genlmsg_reply(msg, info);
10254
10255  nla_put_failure:
10256         kfree_skb(msg);
10257         return -ENOBUFS;
10258 }
10259
10260 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10261 {
10262         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10263         struct cfg80211_update_ft_ies_params ft_params;
10264         struct net_device *dev = info->user_ptr[1];
10265
10266         if (!rdev->ops->update_ft_ies)
10267                 return -EOPNOTSUPP;
10268
10269         if (!info->attrs[NL80211_ATTR_MDID] ||
10270             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10271                 return -EINVAL;
10272
10273         memset(&ft_params, 0, sizeof(ft_params));
10274         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10275         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10276         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10277
10278         return rdev_update_ft_ies(rdev, dev, &ft_params);
10279 }
10280
10281 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10282                                        struct genl_info *info)
10283 {
10284         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10285         struct wireless_dev *wdev = info->user_ptr[1];
10286         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10287         u16 duration;
10288         int ret;
10289
10290         if (!rdev->ops->crit_proto_start)
10291                 return -EOPNOTSUPP;
10292
10293         if (WARN_ON(!rdev->ops->crit_proto_stop))
10294                 return -EINVAL;
10295
10296         if (rdev->crit_proto_nlportid)
10297                 return -EBUSY;
10298
10299         /* determine protocol if provided */
10300         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10301                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10302
10303         if (proto >= NUM_NL80211_CRIT_PROTO)
10304                 return -EINVAL;
10305
10306         /* timeout must be provided */
10307         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10308                 return -EINVAL;
10309
10310         duration =
10311                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10312
10313         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10314                 return -ERANGE;
10315
10316         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10317         if (!ret)
10318                 rdev->crit_proto_nlportid = info->snd_portid;
10319
10320         return ret;
10321 }
10322
10323 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10324                                       struct genl_info *info)
10325 {
10326         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10327         struct wireless_dev *wdev = info->user_ptr[1];
10328
10329         if (!rdev->ops->crit_proto_stop)
10330                 return -EOPNOTSUPP;
10331
10332         if (rdev->crit_proto_nlportid) {
10333                 rdev->crit_proto_nlportid = 0;
10334                 rdev_crit_proto_stop(rdev, wdev);
10335         }
10336         return 0;
10337 }
10338
10339 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10340 {
10341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10342         struct wireless_dev *wdev =
10343                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10344         int i, err;
10345         u32 vid, subcmd;
10346
10347         if (!rdev->wiphy.vendor_commands)
10348                 return -EOPNOTSUPP;
10349
10350         if (IS_ERR(wdev)) {
10351                 err = PTR_ERR(wdev);
10352                 if (err != -EINVAL)
10353                         return err;
10354                 wdev = NULL;
10355         } else if (wdev->wiphy != &rdev->wiphy) {
10356                 return -EINVAL;
10357         }
10358
10359         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10360             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10361                 return -EINVAL;
10362
10363         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10364         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10365         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10366                 const struct wiphy_vendor_command *vcmd;
10367                 void *data = NULL;
10368                 int len = 0;
10369
10370                 vcmd = &rdev->wiphy.vendor_commands[i];
10371
10372                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10373                         continue;
10374
10375                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10376                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10377                         if (!wdev)
10378                                 return -EINVAL;
10379                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10380                             !wdev->netdev)
10381                                 return -EINVAL;
10382
10383                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10384                                 if (wdev->netdev &&
10385                                     !netif_running(wdev->netdev))
10386                                         return -ENETDOWN;
10387                                 if (!wdev->netdev && !wdev->p2p_started)
10388                                         return -ENETDOWN;
10389                         }
10390
10391                         if (!vcmd->doit)
10392                                 return -EOPNOTSUPP;
10393                 } else {
10394                         wdev = NULL;
10395                 }
10396
10397                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10398                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10399                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10400                 }
10401
10402                 rdev->cur_cmd_info = info;
10403                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10404                                                           data, len);
10405                 rdev->cur_cmd_info = NULL;
10406                 return err;
10407         }
10408
10409         return -EOPNOTSUPP;
10410 }
10411
10412 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10413                                        struct netlink_callback *cb,
10414                                        struct cfg80211_registered_device **rdev,
10415                                        struct wireless_dev **wdev)
10416 {
10417         u32 vid, subcmd;
10418         unsigned int i;
10419         int vcmd_idx = -1;
10420         int err;
10421         void *data = NULL;
10422         unsigned int data_len = 0;
10423
10424         rtnl_lock();
10425
10426         if (cb->args[0]) {
10427                 /* subtract the 1 again here */
10428                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10429                 struct wireless_dev *tmp;
10430
10431                 if (!wiphy) {
10432                         err = -ENODEV;
10433                         goto out_unlock;
10434                 }
10435                 *rdev = wiphy_to_rdev(wiphy);
10436                 *wdev = NULL;
10437
10438                 if (cb->args[1]) {
10439                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
10440                                 if (tmp->identifier == cb->args[1] - 1) {
10441                                         *wdev = tmp;
10442                                         break;
10443                                 }
10444                         }
10445                 }
10446
10447                 /* keep rtnl locked in successful case */
10448                 return 0;
10449         }
10450
10451         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10452                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10453                           nl80211_policy);
10454         if (err)
10455                 goto out_unlock;
10456
10457         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10458             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10459                 err = -EINVAL;
10460                 goto out_unlock;
10461         }
10462
10463         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10464                                            nl80211_fam.attrbuf);
10465         if (IS_ERR(*wdev))
10466                 *wdev = NULL;
10467
10468         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10469                                            nl80211_fam.attrbuf);
10470         if (IS_ERR(*rdev)) {
10471                 err = PTR_ERR(*rdev);
10472                 goto out_unlock;
10473         }
10474
10475         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10476         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10477
10478         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10479                 const struct wiphy_vendor_command *vcmd;
10480
10481                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10482
10483                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10484                         continue;
10485
10486                 if (!vcmd->dumpit) {
10487                         err = -EOPNOTSUPP;
10488                         goto out_unlock;
10489                 }
10490
10491                 vcmd_idx = i;
10492                 break;
10493         }
10494
10495         if (vcmd_idx < 0) {
10496                 err = -EOPNOTSUPP;
10497                 goto out_unlock;
10498         }
10499
10500         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10501                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10502                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10503         }
10504
10505         /* 0 is the first index - add 1 to parse only once */
10506         cb->args[0] = (*rdev)->wiphy_idx + 1;
10507         /* add 1 to know if it was NULL */
10508         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10509         cb->args[2] = vcmd_idx;
10510         cb->args[3] = (unsigned long)data;
10511         cb->args[4] = data_len;
10512
10513         /* keep rtnl locked in successful case */
10514         return 0;
10515  out_unlock:
10516         rtnl_unlock();
10517         return err;
10518 }
10519
10520 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10521                                    struct netlink_callback *cb)
10522 {
10523         struct cfg80211_registered_device *rdev;
10524         struct wireless_dev *wdev;
10525         unsigned int vcmd_idx;
10526         const struct wiphy_vendor_command *vcmd;
10527         void *data;
10528         int data_len;
10529         int err;
10530         struct nlattr *vendor_data;
10531
10532         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10533         if (err)
10534                 return err;
10535
10536         vcmd_idx = cb->args[2];
10537         data = (void *)cb->args[3];
10538         data_len = cb->args[4];
10539         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10540
10541         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10542                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10543                 if (!wdev)
10544                         return -EINVAL;
10545                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10546                     !wdev->netdev)
10547                         return -EINVAL;
10548
10549                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10550                         if (wdev->netdev &&
10551                             !netif_running(wdev->netdev))
10552                                 return -ENETDOWN;
10553                         if (!wdev->netdev && !wdev->p2p_started)
10554                                 return -ENETDOWN;
10555                 }
10556         }
10557
10558         while (1) {
10559                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10560                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10561                                            NL80211_CMD_VENDOR);
10562                 if (!hdr)
10563                         break;
10564
10565                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10566                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10567                                                wdev_id(wdev),
10568                                                NL80211_ATTR_PAD))) {
10569                         genlmsg_cancel(skb, hdr);
10570                         break;
10571                 }
10572
10573                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10574                 if (!vendor_data) {
10575                         genlmsg_cancel(skb, hdr);
10576                         break;
10577                 }
10578
10579                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10580                                    (unsigned long *)&cb->args[5]);
10581                 nla_nest_end(skb, vendor_data);
10582
10583                 if (err == -ENOBUFS || err == -ENOENT) {
10584                         genlmsg_cancel(skb, hdr);
10585                         break;
10586                 } else if (err) {
10587                         genlmsg_cancel(skb, hdr);
10588                         goto out;
10589                 }
10590
10591                 genlmsg_end(skb, hdr);
10592         }
10593
10594         err = skb->len;
10595  out:
10596         rtnl_unlock();
10597         return err;
10598 }
10599
10600 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10601                                            enum nl80211_commands cmd,
10602                                            enum nl80211_attrs attr,
10603                                            int approxlen)
10604 {
10605         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10606
10607         if (WARN_ON(!rdev->cur_cmd_info))
10608                 return NULL;
10609
10610         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10611                                            rdev->cur_cmd_info->snd_portid,
10612                                            rdev->cur_cmd_info->snd_seq,
10613                                            cmd, attr, NULL, GFP_KERNEL);
10614 }
10615 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10616
10617 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10618 {
10619         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10620         void *hdr = ((void **)skb->cb)[1];
10621         struct nlattr *data = ((void **)skb->cb)[2];
10622
10623         /* clear CB data for netlink core to own from now on */
10624         memset(skb->cb, 0, sizeof(skb->cb));
10625
10626         if (WARN_ON(!rdev->cur_cmd_info)) {
10627                 kfree_skb(skb);
10628                 return -EINVAL;
10629         }
10630
10631         nla_nest_end(skb, data);
10632         genlmsg_end(skb, hdr);
10633         return genlmsg_reply(skb, rdev->cur_cmd_info);
10634 }
10635 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10636
10637 static int nl80211_set_qos_map(struct sk_buff *skb,
10638                                struct genl_info *info)
10639 {
10640         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10641         struct cfg80211_qos_map *qos_map = NULL;
10642         struct net_device *dev = info->user_ptr[1];
10643         u8 *pos, len, num_des, des_len, des;
10644         int ret;
10645
10646         if (!rdev->ops->set_qos_map)
10647                 return -EOPNOTSUPP;
10648
10649         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10650                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10651                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10652
10653                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10654                     len > IEEE80211_QOS_MAP_LEN_MAX)
10655                         return -EINVAL;
10656
10657                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10658                 if (!qos_map)
10659                         return -ENOMEM;
10660
10661                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10662                 if (num_des) {
10663                         des_len = num_des *
10664                                 sizeof(struct cfg80211_dscp_exception);
10665                         memcpy(qos_map->dscp_exception, pos, des_len);
10666                         qos_map->num_des = num_des;
10667                         for (des = 0; des < num_des; des++) {
10668                                 if (qos_map->dscp_exception[des].up > 7) {
10669                                         kfree(qos_map);
10670                                         return -EINVAL;
10671                                 }
10672                         }
10673                         pos += des_len;
10674                 }
10675                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10676         }
10677
10678         wdev_lock(dev->ieee80211_ptr);
10679         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10680         if (!ret)
10681                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10682         wdev_unlock(dev->ieee80211_ptr);
10683
10684         kfree(qos_map);
10685         return ret;
10686 }
10687
10688 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10689 {
10690         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10691         struct net_device *dev = info->user_ptr[1];
10692         struct wireless_dev *wdev = dev->ieee80211_ptr;
10693         const u8 *peer;
10694         u8 tsid, up;
10695         u16 admitted_time = 0;
10696         int err;
10697
10698         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10699                 return -EOPNOTSUPP;
10700
10701         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10702             !info->attrs[NL80211_ATTR_USER_PRIO])
10703                 return -EINVAL;
10704
10705         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10706         if (tsid >= IEEE80211_NUM_TIDS)
10707                 return -EINVAL;
10708
10709         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10710         if (up >= IEEE80211_NUM_UPS)
10711                 return -EINVAL;
10712
10713         /* WMM uses TIDs 0-7 even for TSPEC */
10714         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10715                 /* TODO: handle 802.11 TSPEC/admission control
10716                  * need more attributes for that (e.g. BA session requirement);
10717                  * change the WMM adminssion test above to allow both then
10718                  */
10719                 return -EINVAL;
10720         }
10721
10722         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10723
10724         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10725                 admitted_time =
10726                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10727                 if (!admitted_time)
10728                         return -EINVAL;
10729         }
10730
10731         wdev_lock(wdev);
10732         switch (wdev->iftype) {
10733         case NL80211_IFTYPE_STATION:
10734         case NL80211_IFTYPE_P2P_CLIENT:
10735                 if (wdev->current_bss)
10736                         break;
10737                 err = -ENOTCONN;
10738                 goto out;
10739         default:
10740                 err = -EOPNOTSUPP;
10741                 goto out;
10742         }
10743
10744         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10745
10746  out:
10747         wdev_unlock(wdev);
10748         return err;
10749 }
10750
10751 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10752 {
10753         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10754         struct net_device *dev = info->user_ptr[1];
10755         struct wireless_dev *wdev = dev->ieee80211_ptr;
10756         const u8 *peer;
10757         u8 tsid;
10758         int err;
10759
10760         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10761                 return -EINVAL;
10762
10763         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10764         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10765
10766         wdev_lock(wdev);
10767         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10768         wdev_unlock(wdev);
10769
10770         return err;
10771 }
10772
10773 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10774                                        struct genl_info *info)
10775 {
10776         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10777         struct net_device *dev = info->user_ptr[1];
10778         struct wireless_dev *wdev = dev->ieee80211_ptr;
10779         struct cfg80211_chan_def chandef = {};
10780         const u8 *addr;
10781         u8 oper_class;
10782         int err;
10783
10784         if (!rdev->ops->tdls_channel_switch ||
10785             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10786                 return -EOPNOTSUPP;
10787
10788         switch (dev->ieee80211_ptr->iftype) {
10789         case NL80211_IFTYPE_STATION:
10790         case NL80211_IFTYPE_P2P_CLIENT:
10791                 break;
10792         default:
10793                 return -EOPNOTSUPP;
10794         }
10795
10796         if (!info->attrs[NL80211_ATTR_MAC] ||
10797             !info->attrs[NL80211_ATTR_OPER_CLASS])
10798                 return -EINVAL;
10799
10800         err = nl80211_parse_chandef(rdev, info, &chandef);
10801         if (err)
10802                 return err;
10803
10804         /*
10805          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10806          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10807          * specification is not defined for them.
10808          */
10809         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10810             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10811             chandef.width != NL80211_CHAN_WIDTH_20)
10812                 return -EINVAL;
10813
10814         /* we will be active on the TDLS link */
10815         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10816                                            wdev->iftype))
10817                 return -EINVAL;
10818
10819         /* don't allow switching to DFS channels */
10820         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10821                 return -EINVAL;
10822
10823         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10824         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10825
10826         wdev_lock(wdev);
10827         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10828         wdev_unlock(wdev);
10829
10830         return err;
10831 }
10832
10833 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10834                                               struct genl_info *info)
10835 {
10836         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10837         struct net_device *dev = info->user_ptr[1];
10838         struct wireless_dev *wdev = dev->ieee80211_ptr;
10839         const u8 *addr;
10840
10841         if (!rdev->ops->tdls_channel_switch ||
10842             !rdev->ops->tdls_cancel_channel_switch ||
10843             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10844                 return -EOPNOTSUPP;
10845
10846         switch (dev->ieee80211_ptr->iftype) {
10847         case NL80211_IFTYPE_STATION:
10848         case NL80211_IFTYPE_P2P_CLIENT:
10849                 break;
10850         default:
10851                 return -EOPNOTSUPP;
10852         }
10853
10854         if (!info->attrs[NL80211_ATTR_MAC])
10855                 return -EINVAL;
10856
10857         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10858
10859         wdev_lock(wdev);
10860         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10861         wdev_unlock(wdev);
10862
10863         return 0;
10864 }
10865
10866 #define NL80211_FLAG_NEED_WIPHY         0x01
10867 #define NL80211_FLAG_NEED_NETDEV        0x02
10868 #define NL80211_FLAG_NEED_RTNL          0x04
10869 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10870 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10871                                          NL80211_FLAG_CHECK_NETDEV_UP)
10872 #define NL80211_FLAG_NEED_WDEV          0x10
10873 /* If a netdev is associated, it must be UP, P2P must be started */
10874 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10875                                          NL80211_FLAG_CHECK_NETDEV_UP)
10876 #define NL80211_FLAG_CLEAR_SKB          0x20
10877
10878 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10879                             struct genl_info *info)
10880 {
10881         struct cfg80211_registered_device *rdev;
10882         struct wireless_dev *wdev;
10883         struct net_device *dev;
10884         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10885
10886         if (rtnl)
10887                 rtnl_lock();
10888
10889         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10890                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10891                 if (IS_ERR(rdev)) {
10892                         if (rtnl)
10893                                 rtnl_unlock();
10894                         return PTR_ERR(rdev);
10895                 }
10896                 info->user_ptr[0] = rdev;
10897         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10898                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10899                 ASSERT_RTNL();
10900
10901                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10902                                                   info->attrs);
10903                 if (IS_ERR(wdev)) {
10904                         if (rtnl)
10905                                 rtnl_unlock();
10906                         return PTR_ERR(wdev);
10907                 }
10908
10909                 dev = wdev->netdev;
10910                 rdev = wiphy_to_rdev(wdev->wiphy);
10911
10912                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10913                         if (!dev) {
10914                                 if (rtnl)
10915                                         rtnl_unlock();
10916                                 return -EINVAL;
10917                         }
10918
10919                         info->user_ptr[1] = dev;
10920                 } else {
10921                         info->user_ptr[1] = wdev;
10922                 }
10923
10924                 if (dev) {
10925                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10926                             !netif_running(dev)) {
10927                                 if (rtnl)
10928                                         rtnl_unlock();
10929                                 return -ENETDOWN;
10930                         }
10931
10932                         dev_hold(dev);
10933                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10934                         if (!wdev->p2p_started) {
10935                                 if (rtnl)
10936                                         rtnl_unlock();
10937                                 return -ENETDOWN;
10938                         }
10939                 }
10940
10941                 info->user_ptr[0] = rdev;
10942         }
10943
10944         return 0;
10945 }
10946
10947 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10948                               struct genl_info *info)
10949 {
10950         if (info->user_ptr[1]) {
10951                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10952                         struct wireless_dev *wdev = info->user_ptr[1];
10953
10954                         if (wdev->netdev)
10955                                 dev_put(wdev->netdev);
10956                 } else {
10957                         dev_put(info->user_ptr[1]);
10958                 }
10959         }
10960
10961         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10962                 rtnl_unlock();
10963
10964         /* If needed, clear the netlink message payload from the SKB
10965          * as it might contain key data that shouldn't stick around on
10966          * the heap after the SKB is freed. The netlink message header
10967          * is still needed for further processing, so leave it intact.
10968          */
10969         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10970                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10971
10972                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10973         }
10974 }
10975
10976 static const struct genl_ops nl80211_ops[] = {
10977         {
10978                 .cmd = NL80211_CMD_GET_WIPHY,
10979                 .doit = nl80211_get_wiphy,
10980                 .dumpit = nl80211_dump_wiphy,
10981                 .done = nl80211_dump_wiphy_done,
10982                 .policy = nl80211_policy,
10983                 /* can be retrieved by unprivileged users */
10984                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10985                                   NL80211_FLAG_NEED_RTNL,
10986         },
10987         {
10988                 .cmd = NL80211_CMD_SET_WIPHY,
10989                 .doit = nl80211_set_wiphy,
10990                 .policy = nl80211_policy,
10991                 .flags = GENL_UNS_ADMIN_PERM,
10992                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10993         },
10994         {
10995                 .cmd = NL80211_CMD_GET_INTERFACE,
10996                 .doit = nl80211_get_interface,
10997                 .dumpit = nl80211_dump_interface,
10998                 .policy = nl80211_policy,
10999                 /* can be retrieved by unprivileged users */
11000                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11001                                   NL80211_FLAG_NEED_RTNL,
11002         },
11003         {
11004                 .cmd = NL80211_CMD_SET_INTERFACE,
11005                 .doit = nl80211_set_interface,
11006                 .policy = nl80211_policy,
11007                 .flags = GENL_UNS_ADMIN_PERM,
11008                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11009                                   NL80211_FLAG_NEED_RTNL,
11010         },
11011         {
11012                 .cmd = NL80211_CMD_NEW_INTERFACE,
11013                 .doit = nl80211_new_interface,
11014                 .policy = nl80211_policy,
11015                 .flags = GENL_UNS_ADMIN_PERM,
11016                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11017                                   NL80211_FLAG_NEED_RTNL,
11018         },
11019         {
11020                 .cmd = NL80211_CMD_DEL_INTERFACE,
11021                 .doit = nl80211_del_interface,
11022                 .policy = nl80211_policy,
11023                 .flags = GENL_UNS_ADMIN_PERM,
11024                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11025                                   NL80211_FLAG_NEED_RTNL,
11026         },
11027         {
11028                 .cmd = NL80211_CMD_GET_KEY,
11029                 .doit = nl80211_get_key,
11030                 .policy = nl80211_policy,
11031                 .flags = GENL_UNS_ADMIN_PERM,
11032                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11033                                   NL80211_FLAG_NEED_RTNL,
11034         },
11035         {
11036                 .cmd = NL80211_CMD_SET_KEY,
11037                 .doit = nl80211_set_key,
11038                 .policy = nl80211_policy,
11039                 .flags = GENL_UNS_ADMIN_PERM,
11040                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11041                                   NL80211_FLAG_NEED_RTNL |
11042                                   NL80211_FLAG_CLEAR_SKB,
11043         },
11044         {
11045                 .cmd = NL80211_CMD_NEW_KEY,
11046                 .doit = nl80211_new_key,
11047                 .policy = nl80211_policy,
11048                 .flags = GENL_UNS_ADMIN_PERM,
11049                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11050                                   NL80211_FLAG_NEED_RTNL |
11051                                   NL80211_FLAG_CLEAR_SKB,
11052         },
11053         {
11054                 .cmd = NL80211_CMD_DEL_KEY,
11055                 .doit = nl80211_del_key,
11056                 .policy = nl80211_policy,
11057                 .flags = GENL_UNS_ADMIN_PERM,
11058                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11059                                   NL80211_FLAG_NEED_RTNL,
11060         },
11061         {
11062                 .cmd = NL80211_CMD_SET_BEACON,
11063                 .policy = nl80211_policy,
11064                 .flags = GENL_UNS_ADMIN_PERM,
11065                 .doit = nl80211_set_beacon,
11066                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11067                                   NL80211_FLAG_NEED_RTNL,
11068         },
11069         {
11070                 .cmd = NL80211_CMD_START_AP,
11071                 .policy = nl80211_policy,
11072                 .flags = GENL_UNS_ADMIN_PERM,
11073                 .doit = nl80211_start_ap,
11074                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11075                                   NL80211_FLAG_NEED_RTNL,
11076         },
11077         {
11078                 .cmd = NL80211_CMD_STOP_AP,
11079                 .policy = nl80211_policy,
11080                 .flags = GENL_UNS_ADMIN_PERM,
11081                 .doit = nl80211_stop_ap,
11082                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11083                                   NL80211_FLAG_NEED_RTNL,
11084         },
11085         {
11086                 .cmd = NL80211_CMD_GET_STATION,
11087                 .doit = nl80211_get_station,
11088                 .dumpit = nl80211_dump_station,
11089                 .policy = nl80211_policy,
11090                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11091                                   NL80211_FLAG_NEED_RTNL,
11092         },
11093         {
11094                 .cmd = NL80211_CMD_SET_STATION,
11095                 .doit = nl80211_set_station,
11096                 .policy = nl80211_policy,
11097                 .flags = GENL_UNS_ADMIN_PERM,
11098                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11099                                   NL80211_FLAG_NEED_RTNL,
11100         },
11101         {
11102                 .cmd = NL80211_CMD_NEW_STATION,
11103                 .doit = nl80211_new_station,
11104                 .policy = nl80211_policy,
11105                 .flags = GENL_UNS_ADMIN_PERM,
11106                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11107                                   NL80211_FLAG_NEED_RTNL,
11108         },
11109         {
11110                 .cmd = NL80211_CMD_DEL_STATION,
11111                 .doit = nl80211_del_station,
11112                 .policy = nl80211_policy,
11113                 .flags = GENL_UNS_ADMIN_PERM,
11114                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11115                                   NL80211_FLAG_NEED_RTNL,
11116         },
11117         {
11118                 .cmd = NL80211_CMD_GET_MPATH,
11119                 .doit = nl80211_get_mpath,
11120                 .dumpit = nl80211_dump_mpath,
11121                 .policy = nl80211_policy,
11122                 .flags = GENL_UNS_ADMIN_PERM,
11123                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11124                                   NL80211_FLAG_NEED_RTNL,
11125         },
11126         {
11127                 .cmd = NL80211_CMD_GET_MPP,
11128                 .doit = nl80211_get_mpp,
11129                 .dumpit = nl80211_dump_mpp,
11130                 .policy = nl80211_policy,
11131                 .flags = GENL_UNS_ADMIN_PERM,
11132                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11133                                   NL80211_FLAG_NEED_RTNL,
11134         },
11135         {
11136                 .cmd = NL80211_CMD_SET_MPATH,
11137                 .doit = nl80211_set_mpath,
11138                 .policy = nl80211_policy,
11139                 .flags = GENL_UNS_ADMIN_PERM,
11140                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11141                                   NL80211_FLAG_NEED_RTNL,
11142         },
11143         {
11144                 .cmd = NL80211_CMD_NEW_MPATH,
11145                 .doit = nl80211_new_mpath,
11146                 .policy = nl80211_policy,
11147                 .flags = GENL_UNS_ADMIN_PERM,
11148                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11149                                   NL80211_FLAG_NEED_RTNL,
11150         },
11151         {
11152                 .cmd = NL80211_CMD_DEL_MPATH,
11153                 .doit = nl80211_del_mpath,
11154                 .policy = nl80211_policy,
11155                 .flags = GENL_UNS_ADMIN_PERM,
11156                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11157                                   NL80211_FLAG_NEED_RTNL,
11158         },
11159         {
11160                 .cmd = NL80211_CMD_SET_BSS,
11161                 .doit = nl80211_set_bss,
11162                 .policy = nl80211_policy,
11163                 .flags = GENL_UNS_ADMIN_PERM,
11164                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11165                                   NL80211_FLAG_NEED_RTNL,
11166         },
11167         {
11168                 .cmd = NL80211_CMD_GET_REG,
11169                 .doit = nl80211_get_reg_do,
11170                 .dumpit = nl80211_get_reg_dump,
11171                 .policy = nl80211_policy,
11172                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11173                 /* can be retrieved by unprivileged users */
11174         },
11175 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11176         {
11177                 .cmd = NL80211_CMD_SET_REG,
11178                 .doit = nl80211_set_reg,
11179                 .policy = nl80211_policy,
11180                 .flags = GENL_ADMIN_PERM,
11181                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11182         },
11183 #endif
11184         {
11185                 .cmd = NL80211_CMD_REQ_SET_REG,
11186                 .doit = nl80211_req_set_reg,
11187                 .policy = nl80211_policy,
11188                 .flags = GENL_ADMIN_PERM,
11189         },
11190         {
11191                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11192                 .doit = nl80211_get_mesh_config,
11193                 .policy = nl80211_policy,
11194                 /* can be retrieved by unprivileged users */
11195                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11196                                   NL80211_FLAG_NEED_RTNL,
11197         },
11198         {
11199                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11200                 .doit = nl80211_update_mesh_config,
11201                 .policy = nl80211_policy,
11202                 .flags = GENL_UNS_ADMIN_PERM,
11203                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11204                                   NL80211_FLAG_NEED_RTNL,
11205         },
11206         {
11207                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11208                 .doit = nl80211_trigger_scan,
11209                 .policy = nl80211_policy,
11210                 .flags = GENL_UNS_ADMIN_PERM,
11211                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11212                                   NL80211_FLAG_NEED_RTNL,
11213         },
11214         {
11215                 .cmd = NL80211_CMD_ABORT_SCAN,
11216                 .doit = nl80211_abort_scan,
11217                 .policy = nl80211_policy,
11218                 .flags = GENL_UNS_ADMIN_PERM,
11219                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11220                                   NL80211_FLAG_NEED_RTNL,
11221         },
11222         {
11223                 .cmd = NL80211_CMD_GET_SCAN,
11224                 .policy = nl80211_policy,
11225                 .dumpit = nl80211_dump_scan,
11226         },
11227         {
11228                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11229                 .doit = nl80211_start_sched_scan,
11230                 .policy = nl80211_policy,
11231                 .flags = GENL_UNS_ADMIN_PERM,
11232                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11233                                   NL80211_FLAG_NEED_RTNL,
11234         },
11235         {
11236                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11237                 .doit = nl80211_stop_sched_scan,
11238                 .policy = nl80211_policy,
11239                 .flags = GENL_UNS_ADMIN_PERM,
11240                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11241                                   NL80211_FLAG_NEED_RTNL,
11242         },
11243         {
11244                 .cmd = NL80211_CMD_AUTHENTICATE,
11245                 .doit = nl80211_authenticate,
11246                 .policy = nl80211_policy,
11247                 .flags = GENL_UNS_ADMIN_PERM,
11248                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11249                                   NL80211_FLAG_NEED_RTNL |
11250                                   NL80211_FLAG_CLEAR_SKB,
11251         },
11252         {
11253                 .cmd = NL80211_CMD_ASSOCIATE,
11254                 .doit = nl80211_associate,
11255                 .policy = nl80211_policy,
11256                 .flags = GENL_UNS_ADMIN_PERM,
11257                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11258                                   NL80211_FLAG_NEED_RTNL,
11259         },
11260         {
11261                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11262                 .doit = nl80211_deauthenticate,
11263                 .policy = nl80211_policy,
11264                 .flags = GENL_UNS_ADMIN_PERM,
11265                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11266                                   NL80211_FLAG_NEED_RTNL,
11267         },
11268         {
11269                 .cmd = NL80211_CMD_DISASSOCIATE,
11270                 .doit = nl80211_disassociate,
11271                 .policy = nl80211_policy,
11272                 .flags = GENL_UNS_ADMIN_PERM,
11273                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11274                                   NL80211_FLAG_NEED_RTNL,
11275         },
11276         {
11277                 .cmd = NL80211_CMD_JOIN_IBSS,
11278                 .doit = nl80211_join_ibss,
11279                 .policy = nl80211_policy,
11280                 .flags = GENL_UNS_ADMIN_PERM,
11281                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11282                                   NL80211_FLAG_NEED_RTNL,
11283         },
11284         {
11285                 .cmd = NL80211_CMD_LEAVE_IBSS,
11286                 .doit = nl80211_leave_ibss,
11287                 .policy = nl80211_policy,
11288                 .flags = GENL_UNS_ADMIN_PERM,
11289                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11290                                   NL80211_FLAG_NEED_RTNL,
11291         },
11292 #ifdef CONFIG_NL80211_TESTMODE
11293         {
11294                 .cmd = NL80211_CMD_TESTMODE,
11295                 .doit = nl80211_testmode_do,
11296                 .dumpit = nl80211_testmode_dump,
11297                 .policy = nl80211_policy,
11298                 .flags = GENL_UNS_ADMIN_PERM,
11299                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11300                                   NL80211_FLAG_NEED_RTNL,
11301         },
11302 #endif
11303         {
11304                 .cmd = NL80211_CMD_CONNECT,
11305                 .doit = nl80211_connect,
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_DISCONNECT,
11313                 .doit = nl80211_disconnect,
11314                 .policy = nl80211_policy,
11315                 .flags = GENL_UNS_ADMIN_PERM,
11316                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11317                                   NL80211_FLAG_NEED_RTNL,
11318         },
11319         {
11320                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11321                 .doit = nl80211_wiphy_netns,
11322                 .policy = nl80211_policy,
11323                 .flags = GENL_UNS_ADMIN_PERM,
11324                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11325                                   NL80211_FLAG_NEED_RTNL,
11326         },
11327         {
11328                 .cmd = NL80211_CMD_GET_SURVEY,
11329                 .policy = nl80211_policy,
11330                 .dumpit = nl80211_dump_survey,
11331         },
11332         {
11333                 .cmd = NL80211_CMD_SET_PMKSA,
11334                 .doit = nl80211_setdel_pmksa,
11335                 .policy = nl80211_policy,
11336                 .flags = GENL_UNS_ADMIN_PERM,
11337                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11338                                   NL80211_FLAG_NEED_RTNL,
11339         },
11340         {
11341                 .cmd = NL80211_CMD_DEL_PMKSA,
11342                 .doit = nl80211_setdel_pmksa,
11343                 .policy = nl80211_policy,
11344                 .flags = GENL_UNS_ADMIN_PERM,
11345                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11346                                   NL80211_FLAG_NEED_RTNL,
11347         },
11348         {
11349                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11350                 .doit = nl80211_flush_pmksa,
11351                 .policy = nl80211_policy,
11352                 .flags = GENL_UNS_ADMIN_PERM,
11353                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11354                                   NL80211_FLAG_NEED_RTNL,
11355         },
11356         {
11357                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11358                 .doit = nl80211_remain_on_channel,
11359                 .policy = nl80211_policy,
11360                 .flags = GENL_UNS_ADMIN_PERM,
11361                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11362                                   NL80211_FLAG_NEED_RTNL,
11363         },
11364         {
11365                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11366                 .doit = nl80211_cancel_remain_on_channel,
11367                 .policy = nl80211_policy,
11368                 .flags = GENL_UNS_ADMIN_PERM,
11369                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11370                                   NL80211_FLAG_NEED_RTNL,
11371         },
11372         {
11373                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11374                 .doit = nl80211_set_tx_bitrate_mask,
11375                 .policy = nl80211_policy,
11376                 .flags = GENL_UNS_ADMIN_PERM,
11377                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11378                                   NL80211_FLAG_NEED_RTNL,
11379         },
11380         {
11381                 .cmd = NL80211_CMD_REGISTER_FRAME,
11382                 .doit = nl80211_register_mgmt,
11383                 .policy = nl80211_policy,
11384                 .flags = GENL_UNS_ADMIN_PERM,
11385                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11386                                   NL80211_FLAG_NEED_RTNL,
11387         },
11388         {
11389                 .cmd = NL80211_CMD_FRAME,
11390                 .doit = nl80211_tx_mgmt,
11391                 .policy = nl80211_policy,
11392                 .flags = GENL_UNS_ADMIN_PERM,
11393                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11394                                   NL80211_FLAG_NEED_RTNL,
11395         },
11396         {
11397                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11398                 .doit = nl80211_tx_mgmt_cancel_wait,
11399                 .policy = nl80211_policy,
11400                 .flags = GENL_UNS_ADMIN_PERM,
11401                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11402                                   NL80211_FLAG_NEED_RTNL,
11403         },
11404         {
11405                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11406                 .doit = nl80211_set_power_save,
11407                 .policy = nl80211_policy,
11408                 .flags = GENL_UNS_ADMIN_PERM,
11409                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11410                                   NL80211_FLAG_NEED_RTNL,
11411         },
11412         {
11413                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11414                 .doit = nl80211_get_power_save,
11415                 .policy = nl80211_policy,
11416                 /* can be retrieved by unprivileged users */
11417                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11418                                   NL80211_FLAG_NEED_RTNL,
11419         },
11420         {
11421                 .cmd = NL80211_CMD_SET_CQM,
11422                 .doit = nl80211_set_cqm,
11423                 .policy = nl80211_policy,
11424                 .flags = GENL_UNS_ADMIN_PERM,
11425                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11426                                   NL80211_FLAG_NEED_RTNL,
11427         },
11428         {
11429                 .cmd = NL80211_CMD_SET_CHANNEL,
11430                 .doit = nl80211_set_channel,
11431                 .policy = nl80211_policy,
11432                 .flags = GENL_UNS_ADMIN_PERM,
11433                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11434                                   NL80211_FLAG_NEED_RTNL,
11435         },
11436         {
11437                 .cmd = NL80211_CMD_SET_WDS_PEER,
11438                 .doit = nl80211_set_wds_peer,
11439                 .policy = nl80211_policy,
11440                 .flags = GENL_UNS_ADMIN_PERM,
11441                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11442                                   NL80211_FLAG_NEED_RTNL,
11443         },
11444         {
11445                 .cmd = NL80211_CMD_JOIN_MESH,
11446                 .doit = nl80211_join_mesh,
11447                 .policy = nl80211_policy,
11448                 .flags = GENL_UNS_ADMIN_PERM,
11449                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11450                                   NL80211_FLAG_NEED_RTNL,
11451         },
11452         {
11453                 .cmd = NL80211_CMD_LEAVE_MESH,
11454                 .doit = nl80211_leave_mesh,
11455                 .policy = nl80211_policy,
11456                 .flags = GENL_UNS_ADMIN_PERM,
11457                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11458                                   NL80211_FLAG_NEED_RTNL,
11459         },
11460         {
11461                 .cmd = NL80211_CMD_JOIN_OCB,
11462                 .doit = nl80211_join_ocb,
11463                 .policy = nl80211_policy,
11464                 .flags = GENL_UNS_ADMIN_PERM,
11465                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11466                                   NL80211_FLAG_NEED_RTNL,
11467         },
11468         {
11469                 .cmd = NL80211_CMD_LEAVE_OCB,
11470                 .doit = nl80211_leave_ocb,
11471                 .policy = nl80211_policy,
11472                 .flags = GENL_UNS_ADMIN_PERM,
11473                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11474                                   NL80211_FLAG_NEED_RTNL,
11475         },
11476 #ifdef CONFIG_PM
11477         {
11478                 .cmd = NL80211_CMD_GET_WOWLAN,
11479                 .doit = nl80211_get_wowlan,
11480                 .policy = nl80211_policy,
11481                 /* can be retrieved by unprivileged users */
11482                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11483                                   NL80211_FLAG_NEED_RTNL,
11484         },
11485         {
11486                 .cmd = NL80211_CMD_SET_WOWLAN,
11487                 .doit = nl80211_set_wowlan,
11488                 .policy = nl80211_policy,
11489                 .flags = GENL_UNS_ADMIN_PERM,
11490                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11491                                   NL80211_FLAG_NEED_RTNL,
11492         },
11493 #endif
11494         {
11495                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11496                 .doit = nl80211_set_rekey_data,
11497                 .policy = nl80211_policy,
11498                 .flags = GENL_UNS_ADMIN_PERM,
11499                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11500                                   NL80211_FLAG_NEED_RTNL |
11501                                   NL80211_FLAG_CLEAR_SKB,
11502         },
11503         {
11504                 .cmd = NL80211_CMD_TDLS_MGMT,
11505                 .doit = nl80211_tdls_mgmt,
11506                 .policy = nl80211_policy,
11507                 .flags = GENL_UNS_ADMIN_PERM,
11508                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11509                                   NL80211_FLAG_NEED_RTNL,
11510         },
11511         {
11512                 .cmd = NL80211_CMD_TDLS_OPER,
11513                 .doit = nl80211_tdls_oper,
11514                 .policy = nl80211_policy,
11515                 .flags = GENL_UNS_ADMIN_PERM,
11516                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11517                                   NL80211_FLAG_NEED_RTNL,
11518         },
11519         {
11520                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11521                 .doit = nl80211_register_unexpected_frame,
11522                 .policy = nl80211_policy,
11523                 .flags = GENL_UNS_ADMIN_PERM,
11524                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11525                                   NL80211_FLAG_NEED_RTNL,
11526         },
11527         {
11528                 .cmd = NL80211_CMD_PROBE_CLIENT,
11529                 .doit = nl80211_probe_client,
11530                 .policy = nl80211_policy,
11531                 .flags = GENL_UNS_ADMIN_PERM,
11532                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11533                                   NL80211_FLAG_NEED_RTNL,
11534         },
11535         {
11536                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11537                 .doit = nl80211_register_beacons,
11538                 .policy = nl80211_policy,
11539                 .flags = GENL_UNS_ADMIN_PERM,
11540                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11541                                   NL80211_FLAG_NEED_RTNL,
11542         },
11543         {
11544                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11545                 .doit = nl80211_set_noack_map,
11546                 .policy = nl80211_policy,
11547                 .flags = GENL_UNS_ADMIN_PERM,
11548                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11549                                   NL80211_FLAG_NEED_RTNL,
11550         },
11551         {
11552                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11553                 .doit = nl80211_start_p2p_device,
11554                 .policy = nl80211_policy,
11555                 .flags = GENL_UNS_ADMIN_PERM,
11556                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11557                                   NL80211_FLAG_NEED_RTNL,
11558         },
11559         {
11560                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11561                 .doit = nl80211_stop_p2p_device,
11562                 .policy = nl80211_policy,
11563                 .flags = GENL_UNS_ADMIN_PERM,
11564                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11565                                   NL80211_FLAG_NEED_RTNL,
11566         },
11567         {
11568                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11569                 .doit = nl80211_set_mcast_rate,
11570                 .policy = nl80211_policy,
11571                 .flags = GENL_UNS_ADMIN_PERM,
11572                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11573                                   NL80211_FLAG_NEED_RTNL,
11574         },
11575         {
11576                 .cmd = NL80211_CMD_SET_MAC_ACL,
11577                 .doit = nl80211_set_mac_acl,
11578                 .policy = nl80211_policy,
11579                 .flags = GENL_UNS_ADMIN_PERM,
11580                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11581                                   NL80211_FLAG_NEED_RTNL,
11582         },
11583         {
11584                 .cmd = NL80211_CMD_RADAR_DETECT,
11585                 .doit = nl80211_start_radar_detection,
11586                 .policy = nl80211_policy,
11587                 .flags = GENL_UNS_ADMIN_PERM,
11588                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11589                                   NL80211_FLAG_NEED_RTNL,
11590         },
11591         {
11592                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11593                 .doit = nl80211_get_protocol_features,
11594                 .policy = nl80211_policy,
11595         },
11596         {
11597                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11598                 .doit = nl80211_update_ft_ies,
11599                 .policy = nl80211_policy,
11600                 .flags = GENL_UNS_ADMIN_PERM,
11601                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11602                                   NL80211_FLAG_NEED_RTNL,
11603         },
11604         {
11605                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11606                 .doit = nl80211_crit_protocol_start,
11607                 .policy = nl80211_policy,
11608                 .flags = GENL_UNS_ADMIN_PERM,
11609                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11610                                   NL80211_FLAG_NEED_RTNL,
11611         },
11612         {
11613                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11614                 .doit = nl80211_crit_protocol_stop,
11615                 .policy = nl80211_policy,
11616                 .flags = GENL_UNS_ADMIN_PERM,
11617                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11618                                   NL80211_FLAG_NEED_RTNL,
11619         },
11620         {
11621                 .cmd = NL80211_CMD_GET_COALESCE,
11622                 .doit = nl80211_get_coalesce,
11623                 .policy = nl80211_policy,
11624                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11625                                   NL80211_FLAG_NEED_RTNL,
11626         },
11627         {
11628                 .cmd = NL80211_CMD_SET_COALESCE,
11629                 .doit = nl80211_set_coalesce,
11630                 .policy = nl80211_policy,
11631                 .flags = GENL_UNS_ADMIN_PERM,
11632                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11633                                   NL80211_FLAG_NEED_RTNL,
11634         },
11635         {
11636                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11637                 .doit = nl80211_channel_switch,
11638                 .policy = nl80211_policy,
11639                 .flags = GENL_UNS_ADMIN_PERM,
11640                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11641                                   NL80211_FLAG_NEED_RTNL,
11642         },
11643         {
11644                 .cmd = NL80211_CMD_VENDOR,
11645                 .doit = nl80211_vendor_cmd,
11646                 .dumpit = nl80211_vendor_cmd_dump,
11647                 .policy = nl80211_policy,
11648                 .flags = GENL_UNS_ADMIN_PERM,
11649                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11650                                   NL80211_FLAG_NEED_RTNL,
11651         },
11652         {
11653                 .cmd = NL80211_CMD_SET_QOS_MAP,
11654                 .doit = nl80211_set_qos_map,
11655                 .policy = nl80211_policy,
11656                 .flags = GENL_UNS_ADMIN_PERM,
11657                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11658                                   NL80211_FLAG_NEED_RTNL,
11659         },
11660         {
11661                 .cmd = NL80211_CMD_ADD_TX_TS,
11662                 .doit = nl80211_add_tx_ts,
11663                 .policy = nl80211_policy,
11664                 .flags = GENL_UNS_ADMIN_PERM,
11665                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11666                                   NL80211_FLAG_NEED_RTNL,
11667         },
11668         {
11669                 .cmd = NL80211_CMD_DEL_TX_TS,
11670                 .doit = nl80211_del_tx_ts,
11671                 .policy = nl80211_policy,
11672                 .flags = GENL_UNS_ADMIN_PERM,
11673                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11674                                   NL80211_FLAG_NEED_RTNL,
11675         },
11676         {
11677                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11678                 .doit = nl80211_tdls_channel_switch,
11679                 .policy = nl80211_policy,
11680                 .flags = GENL_UNS_ADMIN_PERM,
11681                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11682                                   NL80211_FLAG_NEED_RTNL,
11683         },
11684         {
11685                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11686                 .doit = nl80211_tdls_cancel_channel_switch,
11687                 .policy = nl80211_policy,
11688                 .flags = GENL_UNS_ADMIN_PERM,
11689                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11690                                   NL80211_FLAG_NEED_RTNL,
11691         },
11692 };
11693
11694 /* notification functions */
11695
11696 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11697                           enum nl80211_commands cmd)
11698 {
11699         struct sk_buff *msg;
11700         struct nl80211_dump_wiphy_state state = {};
11701
11702         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11703                 cmd != NL80211_CMD_DEL_WIPHY);
11704
11705         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11706         if (!msg)
11707                 return;
11708
11709         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11710                 nlmsg_free(msg);
11711                 return;
11712         }
11713
11714         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11715                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11716 }
11717
11718 static int nl80211_add_scan_req(struct sk_buff *msg,
11719                                 struct cfg80211_registered_device *rdev)
11720 {
11721         struct cfg80211_scan_request *req = rdev->scan_req;
11722         struct nlattr *nest;
11723         int i;
11724
11725         if (WARN_ON(!req))
11726                 return 0;
11727
11728         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11729         if (!nest)
11730                 goto nla_put_failure;
11731         for (i = 0; i < req->n_ssids; i++) {
11732                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11733                         goto nla_put_failure;
11734         }
11735         nla_nest_end(msg, nest);
11736
11737         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11738         if (!nest)
11739                 goto nla_put_failure;
11740         for (i = 0; i < req->n_channels; i++) {
11741                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11742                         goto nla_put_failure;
11743         }
11744         nla_nest_end(msg, nest);
11745
11746         if (req->ie &&
11747             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11748                 goto nla_put_failure;
11749
11750         if (req->flags &&
11751             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11752                 goto nla_put_failure;
11753
11754         return 0;
11755  nla_put_failure:
11756         return -ENOBUFS;
11757 }
11758
11759 static int nl80211_send_scan_msg(struct sk_buff *msg,
11760                                  struct cfg80211_registered_device *rdev,
11761                                  struct wireless_dev *wdev,
11762                                  u32 portid, u32 seq, int flags,
11763                                  u32 cmd)
11764 {
11765         void *hdr;
11766
11767         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11768         if (!hdr)
11769                 return -1;
11770
11771         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11772             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11773                                          wdev->netdev->ifindex)) ||
11774             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11775                               NL80211_ATTR_PAD))
11776                 goto nla_put_failure;
11777
11778         /* ignore errors and send incomplete event anyway */
11779         nl80211_add_scan_req(msg, rdev);
11780
11781         genlmsg_end(msg, hdr);
11782         return 0;
11783
11784  nla_put_failure:
11785         genlmsg_cancel(msg, hdr);
11786         return -EMSGSIZE;
11787 }
11788
11789 static int
11790 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11791                             struct cfg80211_registered_device *rdev,
11792                             struct net_device *netdev,
11793                             u32 portid, u32 seq, int flags, u32 cmd)
11794 {
11795         void *hdr;
11796
11797         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11798         if (!hdr)
11799                 return -1;
11800
11801         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11802             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11803                 goto nla_put_failure;
11804
11805         genlmsg_end(msg, hdr);
11806         return 0;
11807
11808  nla_put_failure:
11809         genlmsg_cancel(msg, hdr);
11810         return -EMSGSIZE;
11811 }
11812
11813 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11814                              struct wireless_dev *wdev)
11815 {
11816         struct sk_buff *msg;
11817
11818         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11819         if (!msg)
11820                 return;
11821
11822         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11823                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11824                 nlmsg_free(msg);
11825                 return;
11826         }
11827
11828         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11829                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11830 }
11831
11832 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11833                                        struct wireless_dev *wdev, bool aborted)
11834 {
11835         struct sk_buff *msg;
11836
11837         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11838         if (!msg)
11839                 return NULL;
11840
11841         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11842                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11843                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11844                 nlmsg_free(msg);
11845                 return NULL;
11846         }
11847
11848         return msg;
11849 }
11850
11851 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11852                               struct sk_buff *msg)
11853 {
11854         if (!msg)
11855                 return;
11856
11857         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11858                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11859 }
11860
11861 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11862                                      struct net_device *netdev)
11863 {
11864         struct sk_buff *msg;
11865
11866         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11867         if (!msg)
11868                 return;
11869
11870         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11871                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11872                 nlmsg_free(msg);
11873                 return;
11874         }
11875
11876         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11877                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11878 }
11879
11880 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11881                              struct net_device *netdev, u32 cmd)
11882 {
11883         struct sk_buff *msg;
11884
11885         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11886         if (!msg)
11887                 return;
11888
11889         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11890                 nlmsg_free(msg);
11891                 return;
11892         }
11893
11894         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11895                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11896 }
11897
11898 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11899                                           struct regulatory_request *request)
11900 {
11901         /* Userspace can always count this one always being set */
11902         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11903                 goto nla_put_failure;
11904
11905         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11906                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11907                                NL80211_REGDOM_TYPE_WORLD))
11908                         goto nla_put_failure;
11909         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11910                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11911                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11912                         goto nla_put_failure;
11913         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11914                    request->intersect) {
11915                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11916                                NL80211_REGDOM_TYPE_INTERSECTION))
11917                         goto nla_put_failure;
11918         } else {
11919                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11920                                NL80211_REGDOM_TYPE_COUNTRY) ||
11921                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11922                                    request->alpha2))
11923                         goto nla_put_failure;
11924         }
11925
11926         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11927                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11928
11929                 if (wiphy &&
11930                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11931                         goto nla_put_failure;
11932
11933                 if (wiphy &&
11934                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11935                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11936                         goto nla_put_failure;
11937         }
11938
11939         return true;
11940
11941 nla_put_failure:
11942         return false;
11943 }
11944
11945 /*
11946  * This can happen on global regulatory changes or device specific settings
11947  * based on custom regulatory domains.
11948  */
11949 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11950                                      struct regulatory_request *request)
11951 {
11952         struct sk_buff *msg;
11953         void *hdr;
11954
11955         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11956         if (!msg)
11957                 return;
11958
11959         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11960         if (!hdr) {
11961                 nlmsg_free(msg);
11962                 return;
11963         }
11964
11965         if (nl80211_reg_change_event_fill(msg, request) == false)
11966                 goto nla_put_failure;
11967
11968         genlmsg_end(msg, hdr);
11969
11970         rcu_read_lock();
11971         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11972                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11973         rcu_read_unlock();
11974
11975         return;
11976
11977 nla_put_failure:
11978         genlmsg_cancel(msg, hdr);
11979         nlmsg_free(msg);
11980 }
11981
11982 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11983                                     struct net_device *netdev,
11984                                     const u8 *buf, size_t len,
11985                                     enum nl80211_commands cmd, gfp_t gfp,
11986                                     int uapsd_queues)
11987 {
11988         struct sk_buff *msg;
11989         void *hdr;
11990
11991         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11992         if (!msg)
11993                 return;
11994
11995         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11996         if (!hdr) {
11997                 nlmsg_free(msg);
11998                 return;
11999         }
12000
12001         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12002             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12003             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
12004                 goto nla_put_failure;
12005
12006         if (uapsd_queues >= 0) {
12007                 struct nlattr *nla_wmm =
12008                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
12009                 if (!nla_wmm)
12010                         goto nla_put_failure;
12011
12012                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
12013                                uapsd_queues))
12014                         goto nla_put_failure;
12015
12016                 nla_nest_end(msg, nla_wmm);
12017         }
12018
12019         genlmsg_end(msg, hdr);
12020
12021         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12022                                 NL80211_MCGRP_MLME, gfp);
12023         return;
12024
12025  nla_put_failure:
12026         genlmsg_cancel(msg, hdr);
12027         nlmsg_free(msg);
12028 }
12029
12030 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
12031                           struct net_device *netdev, const u8 *buf,
12032                           size_t len, gfp_t gfp)
12033 {
12034         nl80211_send_mlme_event(rdev, netdev, buf, len,
12035                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
12036 }
12037
12038 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
12039                            struct net_device *netdev, const u8 *buf,
12040                            size_t len, gfp_t gfp, int uapsd_queues)
12041 {
12042         nl80211_send_mlme_event(rdev, netdev, buf, len,
12043                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12044 }
12045
12046 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12047                          struct net_device *netdev, const u8 *buf,
12048                          size_t len, gfp_t gfp)
12049 {
12050         nl80211_send_mlme_event(rdev, netdev, buf, len,
12051                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12052 }
12053
12054 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12055                            struct net_device *netdev, const u8 *buf,
12056                            size_t len, gfp_t gfp)
12057 {
12058         nl80211_send_mlme_event(rdev, netdev, buf, len,
12059                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12060 }
12061
12062 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12063                                   size_t len)
12064 {
12065         struct wireless_dev *wdev = dev->ieee80211_ptr;
12066         struct wiphy *wiphy = wdev->wiphy;
12067         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12068         const struct ieee80211_mgmt *mgmt = (void *)buf;
12069         u32 cmd;
12070
12071         if (WARN_ON(len < 2))
12072                 return;
12073
12074         if (ieee80211_is_deauth(mgmt->frame_control))
12075                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12076         else
12077                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12078
12079         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12080         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12081 }
12082 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12083
12084 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12085                                       struct net_device *netdev, int cmd,
12086                                       const u8 *addr, gfp_t gfp)
12087 {
12088         struct sk_buff *msg;
12089         void *hdr;
12090
12091         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12092         if (!msg)
12093                 return;
12094
12095         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12096         if (!hdr) {
12097                 nlmsg_free(msg);
12098                 return;
12099         }
12100
12101         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12102             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12103             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12104             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12105                 goto nla_put_failure;
12106
12107         genlmsg_end(msg, hdr);
12108
12109         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12110                                 NL80211_MCGRP_MLME, gfp);
12111         return;
12112
12113  nla_put_failure:
12114         genlmsg_cancel(msg, hdr);
12115         nlmsg_free(msg);
12116 }
12117
12118 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12119                                struct net_device *netdev, const u8 *addr,
12120                                gfp_t gfp)
12121 {
12122         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12123                                   addr, gfp);
12124 }
12125
12126 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12127                                 struct net_device *netdev, const u8 *addr,
12128                                 gfp_t gfp)
12129 {
12130         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12131                                   addr, gfp);
12132 }
12133
12134 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12135                                  struct net_device *netdev, const u8 *bssid,
12136                                  const u8 *req_ie, size_t req_ie_len,
12137                                  const u8 *resp_ie, size_t resp_ie_len,
12138                                  int status, gfp_t gfp)
12139 {
12140         struct sk_buff *msg;
12141         void *hdr;
12142
12143         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12144         if (!msg)
12145                 return;
12146
12147         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12148         if (!hdr) {
12149                 nlmsg_free(msg);
12150                 return;
12151         }
12152
12153         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12154             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12155             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12156             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
12157                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
12158                         status) ||
12159             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
12160             (req_ie &&
12161              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12162             (resp_ie &&
12163              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12164                 goto nla_put_failure;
12165
12166         genlmsg_end(msg, hdr);
12167
12168         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12169                                 NL80211_MCGRP_MLME, gfp);
12170         return;
12171
12172  nla_put_failure:
12173         genlmsg_cancel(msg, hdr);
12174         nlmsg_free(msg);
12175 }
12176
12177 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12178                          struct net_device *netdev, const u8 *bssid,
12179                          const u8 *req_ie, size_t req_ie_len,
12180                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12181 {
12182         struct sk_buff *msg;
12183         void *hdr;
12184
12185         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12186         if (!msg)
12187                 return;
12188
12189         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12190         if (!hdr) {
12191                 nlmsg_free(msg);
12192                 return;
12193         }
12194
12195         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12196             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12197             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12198             (req_ie &&
12199              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12200             (resp_ie &&
12201              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12202                 goto nla_put_failure;
12203
12204         genlmsg_end(msg, hdr);
12205
12206         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12207                                 NL80211_MCGRP_MLME, gfp);
12208         return;
12209
12210  nla_put_failure:
12211         genlmsg_cancel(msg, hdr);
12212         nlmsg_free(msg);
12213 }
12214
12215 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12216                                struct net_device *netdev, u16 reason,
12217                                const u8 *ie, size_t ie_len, bool from_ap)
12218 {
12219         struct sk_buff *msg;
12220         void *hdr;
12221
12222         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12223         if (!msg)
12224                 return;
12225
12226         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12227         if (!hdr) {
12228                 nlmsg_free(msg);
12229                 return;
12230         }
12231
12232         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12233             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12234             (from_ap && reason &&
12235              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12236             (from_ap &&
12237              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12238             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12239                 goto nla_put_failure;
12240
12241         genlmsg_end(msg, hdr);
12242
12243         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12244                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12245         return;
12246
12247  nla_put_failure:
12248         genlmsg_cancel(msg, hdr);
12249         nlmsg_free(msg);
12250 }
12251
12252 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12253                              struct net_device *netdev, const u8 *bssid,
12254                              gfp_t gfp)
12255 {
12256         struct sk_buff *msg;
12257         void *hdr;
12258
12259         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12260         if (!msg)
12261                 return;
12262
12263         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12264         if (!hdr) {
12265                 nlmsg_free(msg);
12266                 return;
12267         }
12268
12269         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12270             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12271             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12272                 goto nla_put_failure;
12273
12274         genlmsg_end(msg, hdr);
12275
12276         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12277                                 NL80211_MCGRP_MLME, gfp);
12278         return;
12279
12280  nla_put_failure:
12281         genlmsg_cancel(msg, hdr);
12282         nlmsg_free(msg);
12283 }
12284
12285 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12286                                         const u8* ie, u8 ie_len, gfp_t gfp)
12287 {
12288         struct wireless_dev *wdev = dev->ieee80211_ptr;
12289         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12290         struct sk_buff *msg;
12291         void *hdr;
12292
12293         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12294                 return;
12295
12296         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12297
12298         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12299         if (!msg)
12300                 return;
12301
12302         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12303         if (!hdr) {
12304                 nlmsg_free(msg);
12305                 return;
12306         }
12307
12308         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12309             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12310             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12311             (ie_len && ie &&
12312              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12313                 goto nla_put_failure;
12314
12315         genlmsg_end(msg, hdr);
12316
12317         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12318                                 NL80211_MCGRP_MLME, gfp);
12319         return;
12320
12321  nla_put_failure:
12322         genlmsg_cancel(msg, hdr);
12323         nlmsg_free(msg);
12324 }
12325 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12326
12327 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12328                                  struct net_device *netdev, const u8 *addr,
12329                                  enum nl80211_key_type key_type, int key_id,
12330                                  const u8 *tsc, gfp_t gfp)
12331 {
12332         struct sk_buff *msg;
12333         void *hdr;
12334
12335         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12336         if (!msg)
12337                 return;
12338
12339         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12340         if (!hdr) {
12341                 nlmsg_free(msg);
12342                 return;
12343         }
12344
12345         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12346             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12347             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12348             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12349             (key_id != -1 &&
12350              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12351             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12352                 goto nla_put_failure;
12353
12354         genlmsg_end(msg, hdr);
12355
12356         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12357                                 NL80211_MCGRP_MLME, gfp);
12358         return;
12359
12360  nla_put_failure:
12361         genlmsg_cancel(msg, hdr);
12362         nlmsg_free(msg);
12363 }
12364
12365 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12366                                     struct ieee80211_channel *channel_before,
12367                                     struct ieee80211_channel *channel_after)
12368 {
12369         struct sk_buff *msg;
12370         void *hdr;
12371         struct nlattr *nl_freq;
12372
12373         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12374         if (!msg)
12375                 return;
12376
12377         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12378         if (!hdr) {
12379                 nlmsg_free(msg);
12380                 return;
12381         }
12382
12383         /*
12384          * Since we are applying the beacon hint to a wiphy we know its
12385          * wiphy_idx is valid
12386          */
12387         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12388                 goto nla_put_failure;
12389
12390         /* Before */
12391         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12392         if (!nl_freq)
12393                 goto nla_put_failure;
12394         if (nl80211_msg_put_channel(msg, channel_before, false))
12395                 goto nla_put_failure;
12396         nla_nest_end(msg, nl_freq);
12397
12398         /* After */
12399         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12400         if (!nl_freq)
12401                 goto nla_put_failure;
12402         if (nl80211_msg_put_channel(msg, channel_after, false))
12403                 goto nla_put_failure;
12404         nla_nest_end(msg, nl_freq);
12405
12406         genlmsg_end(msg, hdr);
12407
12408         rcu_read_lock();
12409         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12410                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12411         rcu_read_unlock();
12412
12413         return;
12414
12415 nla_put_failure:
12416         genlmsg_cancel(msg, hdr);
12417         nlmsg_free(msg);
12418 }
12419
12420 static void nl80211_send_remain_on_chan_event(
12421         int cmd, struct cfg80211_registered_device *rdev,
12422         struct wireless_dev *wdev, u64 cookie,
12423         struct ieee80211_channel *chan,
12424         unsigned int duration, gfp_t gfp)
12425 {
12426         struct sk_buff *msg;
12427         void *hdr;
12428
12429         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12430         if (!msg)
12431                 return;
12432
12433         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12434         if (!hdr) {
12435                 nlmsg_free(msg);
12436                 return;
12437         }
12438
12439         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12440             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12441                                          wdev->netdev->ifindex)) ||
12442             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12443                               NL80211_ATTR_PAD) ||
12444             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12445             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12446                         NL80211_CHAN_NO_HT) ||
12447             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12448                               NL80211_ATTR_PAD))
12449                 goto nla_put_failure;
12450
12451         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12452             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12453                 goto nla_put_failure;
12454
12455         genlmsg_end(msg, hdr);
12456
12457         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12458                                 NL80211_MCGRP_MLME, gfp);
12459         return;
12460
12461  nla_put_failure:
12462         genlmsg_cancel(msg, hdr);
12463         nlmsg_free(msg);
12464 }
12465
12466 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12467                                struct ieee80211_channel *chan,
12468                                unsigned int duration, gfp_t gfp)
12469 {
12470         struct wiphy *wiphy = wdev->wiphy;
12471         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12472
12473         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12474         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12475                                           rdev, wdev, cookie, chan,
12476                                           duration, gfp);
12477 }
12478 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12479
12480 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12481                                         struct ieee80211_channel *chan,
12482                                         gfp_t gfp)
12483 {
12484         struct wiphy *wiphy = wdev->wiphy;
12485         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12486
12487         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12488         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12489                                           rdev, wdev, cookie, chan, 0, gfp);
12490 }
12491 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12492
12493 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12494                       struct station_info *sinfo, gfp_t gfp)
12495 {
12496         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12497         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12498         struct sk_buff *msg;
12499
12500         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12501
12502         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12503         if (!msg)
12504                 return;
12505
12506         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12507                                  rdev, dev, mac_addr, sinfo) < 0) {
12508                 nlmsg_free(msg);
12509                 return;
12510         }
12511
12512         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12513                                 NL80211_MCGRP_MLME, gfp);
12514 }
12515 EXPORT_SYMBOL(cfg80211_new_sta);
12516
12517 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12518                             struct station_info *sinfo, gfp_t gfp)
12519 {
12520         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12521         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12522         struct sk_buff *msg;
12523         struct station_info empty_sinfo = {};
12524
12525         if (!sinfo)
12526                 sinfo = &empty_sinfo;
12527
12528         trace_cfg80211_del_sta(dev, mac_addr);
12529
12530         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12531         if (!msg)
12532                 return;
12533
12534         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12535                                  rdev, dev, mac_addr, sinfo) < 0) {
12536                 nlmsg_free(msg);
12537                 return;
12538         }
12539
12540         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12541                                 NL80211_MCGRP_MLME, gfp);
12542 }
12543 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12544
12545 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12546                           enum nl80211_connect_failed_reason reason,
12547                           gfp_t gfp)
12548 {
12549         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12550         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12551         struct sk_buff *msg;
12552         void *hdr;
12553
12554         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12555         if (!msg)
12556                 return;
12557
12558         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12559         if (!hdr) {
12560                 nlmsg_free(msg);
12561                 return;
12562         }
12563
12564         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12565             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12566             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12567                 goto nla_put_failure;
12568
12569         genlmsg_end(msg, hdr);
12570
12571         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12572                                 NL80211_MCGRP_MLME, gfp);
12573         return;
12574
12575  nla_put_failure:
12576         genlmsg_cancel(msg, hdr);
12577         nlmsg_free(msg);
12578 }
12579 EXPORT_SYMBOL(cfg80211_conn_failed);
12580
12581 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12582                                        const u8 *addr, gfp_t gfp)
12583 {
12584         struct wireless_dev *wdev = dev->ieee80211_ptr;
12585         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12586         struct sk_buff *msg;
12587         void *hdr;
12588         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12589
12590         if (!nlportid)
12591                 return false;
12592
12593         msg = nlmsg_new(100, gfp);
12594         if (!msg)
12595                 return true;
12596
12597         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12598         if (!hdr) {
12599                 nlmsg_free(msg);
12600                 return true;
12601         }
12602
12603         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12604             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12605             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12606                 goto nla_put_failure;
12607
12608         genlmsg_end(msg, hdr);
12609         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12610         return true;
12611
12612  nla_put_failure:
12613         genlmsg_cancel(msg, hdr);
12614         nlmsg_free(msg);
12615         return true;
12616 }
12617
12618 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12619                                 const u8 *addr, gfp_t gfp)
12620 {
12621         struct wireless_dev *wdev = dev->ieee80211_ptr;
12622         bool ret;
12623
12624         trace_cfg80211_rx_spurious_frame(dev, addr);
12625
12626         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12627                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12628                 trace_cfg80211_return_bool(false);
12629                 return false;
12630         }
12631         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12632                                          addr, gfp);
12633         trace_cfg80211_return_bool(ret);
12634         return ret;
12635 }
12636 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12637
12638 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12639                                         const u8 *addr, gfp_t gfp)
12640 {
12641         struct wireless_dev *wdev = dev->ieee80211_ptr;
12642         bool ret;
12643
12644         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12645
12646         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12647                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12648                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12649                 trace_cfg80211_return_bool(false);
12650                 return false;
12651         }
12652         ret = __nl80211_unexpected_frame(dev,
12653                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12654                                          addr, gfp);
12655         trace_cfg80211_return_bool(ret);
12656         return ret;
12657 }
12658 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12659
12660 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12661                       struct wireless_dev *wdev, u32 nlportid,
12662                       int freq, int sig_dbm,
12663                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12664 {
12665         struct net_device *netdev = wdev->netdev;
12666         struct sk_buff *msg;
12667         void *hdr;
12668
12669         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12670         if (!msg)
12671                 return -ENOMEM;
12672
12673         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12674         if (!hdr) {
12675                 nlmsg_free(msg);
12676                 return -ENOMEM;
12677         }
12678
12679         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12680             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12681                                         netdev->ifindex)) ||
12682             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12683                               NL80211_ATTR_PAD) ||
12684             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12685             (sig_dbm &&
12686              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12687             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12688             (flags &&
12689              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12690                 goto nla_put_failure;
12691
12692         genlmsg_end(msg, hdr);
12693
12694         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12695
12696  nla_put_failure:
12697         genlmsg_cancel(msg, hdr);
12698         nlmsg_free(msg);
12699         return -ENOBUFS;
12700 }
12701
12702 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12703                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12704 {
12705         struct wiphy *wiphy = wdev->wiphy;
12706         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12707         struct net_device *netdev = wdev->netdev;
12708         struct sk_buff *msg;
12709         void *hdr;
12710
12711         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12712
12713         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12714         if (!msg)
12715                 return;
12716
12717         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12718         if (!hdr) {
12719                 nlmsg_free(msg);
12720                 return;
12721         }
12722
12723         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12724             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12725                                    netdev->ifindex)) ||
12726             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12727                               NL80211_ATTR_PAD) ||
12728             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12729             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12730                               NL80211_ATTR_PAD) ||
12731             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12732                 goto nla_put_failure;
12733
12734         genlmsg_end(msg, hdr);
12735
12736         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12737                                 NL80211_MCGRP_MLME, gfp);
12738         return;
12739
12740  nla_put_failure:
12741         genlmsg_cancel(msg, hdr);
12742         nlmsg_free(msg);
12743 }
12744 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12745
12746 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12747                                             const char *mac, gfp_t gfp)
12748 {
12749         struct wireless_dev *wdev = dev->ieee80211_ptr;
12750         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12751         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12752         void **cb;
12753
12754         if (!msg)
12755                 return NULL;
12756
12757         cb = (void **)msg->cb;
12758
12759         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12760         if (!cb[0]) {
12761                 nlmsg_free(msg);
12762                 return NULL;
12763         }
12764
12765         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12766             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12767                 goto nla_put_failure;
12768
12769         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12770                 goto nla_put_failure;
12771
12772         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12773         if (!cb[1])
12774                 goto nla_put_failure;
12775
12776         cb[2] = rdev;
12777
12778         return msg;
12779  nla_put_failure:
12780         nlmsg_free(msg);
12781         return NULL;
12782 }
12783
12784 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12785 {
12786         void **cb = (void **)msg->cb;
12787         struct cfg80211_registered_device *rdev = cb[2];
12788
12789         nla_nest_end(msg, cb[1]);
12790         genlmsg_end(msg, cb[0]);
12791
12792         memset(msg->cb, 0, sizeof(msg->cb));
12793
12794         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12795                                 NL80211_MCGRP_MLME, gfp);
12796 }
12797
12798 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12799                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12800                               gfp_t gfp)
12801 {
12802         struct sk_buff *msg;
12803
12804         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12805
12806         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12807                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12808                 return;
12809
12810         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12811         if (!msg)
12812                 return;
12813
12814         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12815                         rssi_event))
12816                 goto nla_put_failure;
12817
12818         cfg80211_send_cqm(msg, gfp);
12819
12820         return;
12821
12822  nla_put_failure:
12823         nlmsg_free(msg);
12824 }
12825 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12826
12827 void cfg80211_cqm_txe_notify(struct net_device *dev,
12828                              const u8 *peer, u32 num_packets,
12829                              u32 rate, u32 intvl, gfp_t gfp)
12830 {
12831         struct sk_buff *msg;
12832
12833         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12834         if (!msg)
12835                 return;
12836
12837         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12838                 goto nla_put_failure;
12839
12840         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12841                 goto nla_put_failure;
12842
12843         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12844                 goto nla_put_failure;
12845
12846         cfg80211_send_cqm(msg, gfp);
12847         return;
12848
12849  nla_put_failure:
12850         nlmsg_free(msg);
12851 }
12852 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12853
12854 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12855                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12856 {
12857         struct sk_buff *msg;
12858
12859         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12860
12861         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12862         if (!msg)
12863                 return;
12864
12865         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12866                 goto nla_put_failure;
12867
12868         cfg80211_send_cqm(msg, gfp);
12869         return;
12870
12871  nla_put_failure:
12872         nlmsg_free(msg);
12873 }
12874 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12875
12876 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12877 {
12878         struct sk_buff *msg;
12879
12880         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12881         if (!msg)
12882                 return;
12883
12884         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12885                 goto nla_put_failure;
12886
12887         cfg80211_send_cqm(msg, gfp);
12888         return;
12889
12890  nla_put_failure:
12891         nlmsg_free(msg);
12892 }
12893 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12894
12895 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12896                                      struct net_device *netdev, const u8 *bssid,
12897                                      const u8 *replay_ctr, gfp_t gfp)
12898 {
12899         struct sk_buff *msg;
12900         struct nlattr *rekey_attr;
12901         void *hdr;
12902
12903         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12904         if (!msg)
12905                 return;
12906
12907         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12908         if (!hdr) {
12909                 nlmsg_free(msg);
12910                 return;
12911         }
12912
12913         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12914             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12915             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12916                 goto nla_put_failure;
12917
12918         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12919         if (!rekey_attr)
12920                 goto nla_put_failure;
12921
12922         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12923                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12924                 goto nla_put_failure;
12925
12926         nla_nest_end(msg, rekey_attr);
12927
12928         genlmsg_end(msg, hdr);
12929
12930         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12931                                 NL80211_MCGRP_MLME, gfp);
12932         return;
12933
12934  nla_put_failure:
12935         genlmsg_cancel(msg, hdr);
12936         nlmsg_free(msg);
12937 }
12938
12939 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12940                                const u8 *replay_ctr, gfp_t gfp)
12941 {
12942         struct wireless_dev *wdev = dev->ieee80211_ptr;
12943         struct wiphy *wiphy = wdev->wiphy;
12944         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12945
12946         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12947         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12948 }
12949 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12950
12951 static void
12952 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12953                                struct net_device *netdev, int index,
12954                                const u8 *bssid, bool preauth, gfp_t gfp)
12955 {
12956         struct sk_buff *msg;
12957         struct nlattr *attr;
12958         void *hdr;
12959
12960         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12961         if (!msg)
12962                 return;
12963
12964         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12965         if (!hdr) {
12966                 nlmsg_free(msg);
12967                 return;
12968         }
12969
12970         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12971             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12972                 goto nla_put_failure;
12973
12974         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12975         if (!attr)
12976                 goto nla_put_failure;
12977
12978         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12979             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12980             (preauth &&
12981              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12982                 goto nla_put_failure;
12983
12984         nla_nest_end(msg, attr);
12985
12986         genlmsg_end(msg, hdr);
12987
12988         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12989                                 NL80211_MCGRP_MLME, gfp);
12990         return;
12991
12992  nla_put_failure:
12993         genlmsg_cancel(msg, hdr);
12994         nlmsg_free(msg);
12995 }
12996
12997 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12998                                      const u8 *bssid, bool preauth, gfp_t gfp)
12999 {
13000         struct wireless_dev *wdev = dev->ieee80211_ptr;
13001         struct wiphy *wiphy = wdev->wiphy;
13002         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13003
13004         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
13005         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
13006 }
13007 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
13008
13009 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
13010                                      struct net_device *netdev,
13011                                      struct cfg80211_chan_def *chandef,
13012                                      gfp_t gfp,
13013                                      enum nl80211_commands notif,
13014                                      u8 count)
13015 {
13016         struct sk_buff *msg;
13017         void *hdr;
13018
13019         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13020         if (!msg)
13021                 return;
13022
13023         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
13024         if (!hdr) {
13025                 nlmsg_free(msg);
13026                 return;
13027         }
13028
13029         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13030                 goto nla_put_failure;
13031
13032         if (nl80211_send_chandef(msg, chandef))
13033                 goto nla_put_failure;
13034
13035         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
13036             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
13037                         goto nla_put_failure;
13038
13039         genlmsg_end(msg, hdr);
13040
13041         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13042                                 NL80211_MCGRP_MLME, gfp);
13043         return;
13044
13045  nla_put_failure:
13046         genlmsg_cancel(msg, hdr);
13047         nlmsg_free(msg);
13048 }
13049
13050 void cfg80211_ch_switch_notify(struct net_device *dev,
13051                                struct cfg80211_chan_def *chandef)
13052 {
13053         struct wireless_dev *wdev = dev->ieee80211_ptr;
13054         struct wiphy *wiphy = wdev->wiphy;
13055         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13056
13057         ASSERT_WDEV_LOCK(wdev);
13058
13059         trace_cfg80211_ch_switch_notify(dev, chandef);
13060
13061         wdev->chandef = *chandef;
13062         wdev->preset_chandef = *chandef;
13063         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13064                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13065 }
13066 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13067
13068 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13069                                        struct cfg80211_chan_def *chandef,
13070                                        u8 count)
13071 {
13072         struct wireless_dev *wdev = dev->ieee80211_ptr;
13073         struct wiphy *wiphy = wdev->wiphy;
13074         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13075
13076         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13077
13078         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13079                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13080 }
13081 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13082
13083 void
13084 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13085                      const struct cfg80211_chan_def *chandef,
13086                      enum nl80211_radar_event event,
13087                      struct net_device *netdev, gfp_t gfp)
13088 {
13089         struct sk_buff *msg;
13090         void *hdr;
13091
13092         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13093         if (!msg)
13094                 return;
13095
13096         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13097         if (!hdr) {
13098                 nlmsg_free(msg);
13099                 return;
13100         }
13101
13102         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13103                 goto nla_put_failure;
13104
13105         /* NOP and radar events don't need a netdev parameter */
13106         if (netdev) {
13107                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13108
13109                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13110                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13111                                       NL80211_ATTR_PAD))
13112                         goto nla_put_failure;
13113         }
13114
13115         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13116                 goto nla_put_failure;
13117
13118         if (nl80211_send_chandef(msg, chandef))
13119                 goto nla_put_failure;
13120
13121         genlmsg_end(msg, hdr);
13122
13123         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13124                                 NL80211_MCGRP_MLME, gfp);
13125         return;
13126
13127  nla_put_failure:
13128         genlmsg_cancel(msg, hdr);
13129         nlmsg_free(msg);
13130 }
13131
13132 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13133                            u64 cookie, bool acked, gfp_t gfp)
13134 {
13135         struct wireless_dev *wdev = dev->ieee80211_ptr;
13136         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13137         struct sk_buff *msg;
13138         void *hdr;
13139
13140         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13141
13142         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13143
13144         if (!msg)
13145                 return;
13146
13147         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13148         if (!hdr) {
13149                 nlmsg_free(msg);
13150                 return;
13151         }
13152
13153         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13154             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13155             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13156             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13157                               NL80211_ATTR_PAD) ||
13158             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13159                 goto nla_put_failure;
13160
13161         genlmsg_end(msg, hdr);
13162
13163         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13164                                 NL80211_MCGRP_MLME, gfp);
13165         return;
13166
13167  nla_put_failure:
13168         genlmsg_cancel(msg, hdr);
13169         nlmsg_free(msg);
13170 }
13171 EXPORT_SYMBOL(cfg80211_probe_status);
13172
13173 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13174                                  const u8 *frame, size_t len,
13175                                  int freq, int sig_dbm)
13176 {
13177         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13178         struct sk_buff *msg;
13179         void *hdr;
13180         struct cfg80211_beacon_registration *reg;
13181
13182         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13183
13184         spin_lock_bh(&rdev->beacon_registrations_lock);
13185         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13186                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13187                 if (!msg) {
13188                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13189                         return;
13190                 }
13191
13192                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13193                 if (!hdr)
13194                         goto nla_put_failure;
13195
13196                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13197                     (freq &&
13198                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13199                     (sig_dbm &&
13200                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13201                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13202                         goto nla_put_failure;
13203
13204                 genlmsg_end(msg, hdr);
13205
13206                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13207         }
13208         spin_unlock_bh(&rdev->beacon_registrations_lock);
13209         return;
13210
13211  nla_put_failure:
13212         spin_unlock_bh(&rdev->beacon_registrations_lock);
13213         if (hdr)
13214                 genlmsg_cancel(msg, hdr);
13215         nlmsg_free(msg);
13216 }
13217 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13218
13219 #ifdef CONFIG_PM
13220 static int cfg80211_net_detect_results(struct sk_buff *msg,
13221                                        struct cfg80211_wowlan_wakeup *wakeup)
13222 {
13223         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13224         struct nlattr *nl_results, *nl_match, *nl_freqs;
13225         int i, j;
13226
13227         nl_results = nla_nest_start(
13228                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13229         if (!nl_results)
13230                 return -EMSGSIZE;
13231
13232         for (i = 0; i < nd->n_matches; i++) {
13233                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13234
13235                 nl_match = nla_nest_start(msg, i);
13236                 if (!nl_match)
13237                         break;
13238
13239                 /* The SSID attribute is optional in nl80211, but for
13240                  * simplicity reasons it's always present in the
13241                  * cfg80211 structure.  If a driver can't pass the
13242                  * SSID, that needs to be changed.  A zero length SSID
13243                  * is still a valid SSID (wildcard), so it cannot be
13244                  * used for this purpose.
13245                  */
13246                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13247                             match->ssid.ssid)) {
13248                         nla_nest_cancel(msg, nl_match);
13249                         goto out;
13250                 }
13251
13252                 if (match->n_channels) {
13253                         nl_freqs = nla_nest_start(
13254                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13255                         if (!nl_freqs) {
13256                                 nla_nest_cancel(msg, nl_match);
13257                                 goto out;
13258                         }
13259
13260                         for (j = 0; j < match->n_channels; j++) {
13261                                 if (nla_put_u32(msg, j, match->channels[j])) {
13262                                         nla_nest_cancel(msg, nl_freqs);
13263                                         nla_nest_cancel(msg, nl_match);
13264                                         goto out;
13265                                 }
13266                         }
13267
13268                         nla_nest_end(msg, nl_freqs);
13269                 }
13270
13271                 nla_nest_end(msg, nl_match);
13272         }
13273
13274 out:
13275         nla_nest_end(msg, nl_results);
13276         return 0;
13277 }
13278
13279 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13280                                    struct cfg80211_wowlan_wakeup *wakeup,
13281                                    gfp_t gfp)
13282 {
13283         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13284         struct sk_buff *msg;
13285         void *hdr;
13286         int size = 200;
13287
13288         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13289
13290         if (wakeup)
13291                 size += wakeup->packet_present_len;
13292
13293         msg = nlmsg_new(size, gfp);
13294         if (!msg)
13295                 return;
13296
13297         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13298         if (!hdr)
13299                 goto free_msg;
13300
13301         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13302             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13303                               NL80211_ATTR_PAD))
13304                 goto free_msg;
13305
13306         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13307                                         wdev->netdev->ifindex))
13308                 goto free_msg;
13309
13310         if (wakeup) {
13311                 struct nlattr *reasons;
13312
13313                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13314                 if (!reasons)
13315                         goto free_msg;
13316
13317                 if (wakeup->disconnect &&
13318                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13319                         goto free_msg;
13320                 if (wakeup->magic_pkt &&
13321                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13322                         goto free_msg;
13323                 if (wakeup->gtk_rekey_failure &&
13324                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13325                         goto free_msg;
13326                 if (wakeup->eap_identity_req &&
13327                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13328                         goto free_msg;
13329                 if (wakeup->four_way_handshake &&
13330                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13331                         goto free_msg;
13332                 if (wakeup->rfkill_release &&
13333                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13334                         goto free_msg;
13335
13336                 if (wakeup->pattern_idx >= 0 &&
13337                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13338                                 wakeup->pattern_idx))
13339                         goto free_msg;
13340
13341                 if (wakeup->tcp_match &&
13342                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13343                         goto free_msg;
13344
13345                 if (wakeup->tcp_connlost &&
13346                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13347                         goto free_msg;
13348
13349                 if (wakeup->tcp_nomoretokens &&
13350                     nla_put_flag(msg,
13351                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13352                         goto free_msg;
13353
13354                 if (wakeup->packet) {
13355                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13356                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13357
13358                         if (!wakeup->packet_80211) {
13359                                 pkt_attr =
13360                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13361                                 len_attr =
13362                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13363                         }
13364
13365                         if (wakeup->packet_len &&
13366                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13367                                 goto free_msg;
13368
13369                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13370                                     wakeup->packet))
13371                                 goto free_msg;
13372                 }
13373
13374                 if (wakeup->net_detect &&
13375                     cfg80211_net_detect_results(msg, wakeup))
13376                                 goto free_msg;
13377
13378                 nla_nest_end(msg, reasons);
13379         }
13380
13381         genlmsg_end(msg, hdr);
13382
13383         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13384                                 NL80211_MCGRP_MLME, gfp);
13385         return;
13386
13387  free_msg:
13388         nlmsg_free(msg);
13389 }
13390 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13391 #endif
13392
13393 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13394                                 enum nl80211_tdls_operation oper,
13395                                 u16 reason_code, gfp_t gfp)
13396 {
13397         struct wireless_dev *wdev = dev->ieee80211_ptr;
13398         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13399         struct sk_buff *msg;
13400         void *hdr;
13401
13402         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13403                                          reason_code);
13404
13405         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13406         if (!msg)
13407                 return;
13408
13409         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13410         if (!hdr) {
13411                 nlmsg_free(msg);
13412                 return;
13413         }
13414
13415         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13416             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13417             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13418             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13419             (reason_code > 0 &&
13420              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13421                 goto nla_put_failure;
13422
13423         genlmsg_end(msg, hdr);
13424
13425         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13426                                 NL80211_MCGRP_MLME, gfp);
13427         return;
13428
13429  nla_put_failure:
13430         genlmsg_cancel(msg, hdr);
13431         nlmsg_free(msg);
13432 }
13433 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13434
13435 static int nl80211_netlink_notify(struct notifier_block * nb,
13436                                   unsigned long state,
13437                                   void *_notify)
13438 {
13439         struct netlink_notify *notify = _notify;
13440         struct cfg80211_registered_device *rdev;
13441         struct wireless_dev *wdev;
13442         struct cfg80211_beacon_registration *reg, *tmp;
13443
13444         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13445                 return NOTIFY_DONE;
13446
13447         rcu_read_lock();
13448
13449         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13450                 bool schedule_destroy_work = false;
13451                 bool schedule_scan_stop = false;
13452                 struct cfg80211_sched_scan_request *sched_scan_req =
13453                         rcu_dereference(rdev->sched_scan_req);
13454
13455                 if (sched_scan_req && notify->portid &&
13456                     sched_scan_req->owner_nlportid == notify->portid)
13457                         schedule_scan_stop = true;
13458
13459                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
13460                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13461
13462                         if (wdev->owner_nlportid == notify->portid)
13463                                 schedule_destroy_work = true;
13464                 }
13465
13466                 spin_lock_bh(&rdev->beacon_registrations_lock);
13467                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13468                                          list) {
13469                         if (reg->nlportid == notify->portid) {
13470                                 list_del(&reg->list);
13471                                 kfree(reg);
13472                                 break;
13473                         }
13474                 }
13475                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13476
13477                 if (schedule_destroy_work) {
13478                         struct cfg80211_iface_destroy *destroy;
13479
13480                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13481                         if (destroy) {
13482                                 destroy->nlportid = notify->portid;
13483                                 spin_lock(&rdev->destroy_list_lock);
13484                                 list_add(&destroy->list, &rdev->destroy_list);
13485                                 spin_unlock(&rdev->destroy_list_lock);
13486                                 schedule_work(&rdev->destroy_work);
13487                         }
13488                 } else if (schedule_scan_stop) {
13489                         sched_scan_req->owner_nlportid = 0;
13490
13491                         if (rdev->ops->sched_scan_stop &&
13492                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13493                                 schedule_work(&rdev->sched_scan_stop_wk);
13494                 }
13495         }
13496
13497         rcu_read_unlock();
13498
13499         /*
13500          * It is possible that the user space process that is controlling the
13501          * indoor setting disappeared, so notify the regulatory core.
13502          */
13503         regulatory_netlink_notify(notify->portid);
13504         return NOTIFY_OK;
13505 }
13506
13507 static struct notifier_block nl80211_netlink_notifier = {
13508         .notifier_call = nl80211_netlink_notify,
13509 };
13510
13511 void cfg80211_ft_event(struct net_device *netdev,
13512                        struct cfg80211_ft_event_params *ft_event)
13513 {
13514         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13515         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13516         struct sk_buff *msg;
13517         void *hdr;
13518
13519         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13520
13521         if (!ft_event->target_ap)
13522                 return;
13523
13524         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13525         if (!msg)
13526                 return;
13527
13528         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13529         if (!hdr)
13530                 goto out;
13531
13532         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13533             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13534             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13535                 goto out;
13536
13537         if (ft_event->ies &&
13538             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13539                 goto out;
13540         if (ft_event->ric_ies &&
13541             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13542                     ft_event->ric_ies))
13543                 goto out;
13544
13545         genlmsg_end(msg, hdr);
13546
13547         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13548                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13549         return;
13550  out:
13551         nlmsg_free(msg);
13552 }
13553 EXPORT_SYMBOL(cfg80211_ft_event);
13554
13555 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13556 {
13557         struct cfg80211_registered_device *rdev;
13558         struct sk_buff *msg;
13559         void *hdr;
13560         u32 nlportid;
13561
13562         rdev = wiphy_to_rdev(wdev->wiphy);
13563         if (!rdev->crit_proto_nlportid)
13564                 return;
13565
13566         nlportid = rdev->crit_proto_nlportid;
13567         rdev->crit_proto_nlportid = 0;
13568
13569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13570         if (!msg)
13571                 return;
13572
13573         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13574         if (!hdr)
13575                 goto nla_put_failure;
13576
13577         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13578             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13579                               NL80211_ATTR_PAD))
13580                 goto nla_put_failure;
13581
13582         genlmsg_end(msg, hdr);
13583
13584         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13585         return;
13586
13587  nla_put_failure:
13588         if (hdr)
13589                 genlmsg_cancel(msg, hdr);
13590         nlmsg_free(msg);
13591 }
13592 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13593
13594 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13595 {
13596         struct wiphy *wiphy = wdev->wiphy;
13597         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13598         struct sk_buff *msg;
13599         void *hdr;
13600
13601         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13602         if (!msg)
13603                 return;
13604
13605         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13606         if (!hdr)
13607                 goto out;
13608
13609         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13610             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13611             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13612                               NL80211_ATTR_PAD))
13613                 goto out;
13614
13615         genlmsg_end(msg, hdr);
13616
13617         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13618                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13619         return;
13620  out:
13621         nlmsg_free(msg);
13622 }
13623
13624 /* initialisation/exit functions */
13625
13626 int nl80211_init(void)
13627 {
13628         int err;
13629
13630         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13631                                                    nl80211_mcgrps);
13632         if (err)
13633                 return err;
13634
13635         err = netlink_register_notifier(&nl80211_netlink_notifier);
13636         if (err)
13637                 goto err_out;
13638
13639         return 0;
13640  err_out:
13641         genl_unregister_family(&nl80211_fam);
13642         return err;
13643 }
13644
13645 void nl80211_exit(void)
13646 {
13647         netlink_unregister_notifier(&nl80211_netlink_notifier);
13648         genl_unregister_family(&nl80211_fam);
13649 }