net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015-2016  Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  36                             struct genl_info *info);
  37 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  38                               struct genl_info *info);
  39
  40 /* the netlink family */
  41 static struct genl_family nl80211_fam = {
  42         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  43         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  44         .hdrsize = 0,                   /* no private header */
  45         .version = 1,                   /* no particular meaning now */
  46         .maxattr = NL80211_ATTR_MAX,
  47         .netnsok = true,
  48         .pre_doit = nl80211_pre_doit,
  49         .post_doit = nl80211_post_doit,
  50 };
  51
  52 /* multicast groups */
  53 enum nl80211_multicast_groups {
  54         NL80211_MCGRP_CONFIG,
  55         NL80211_MCGRP_SCAN,
  56         NL80211_MCGRP_REGULATORY,
  57         NL80211_MCGRP_MLME,
  58         NL80211_MCGRP_VENDOR,
  59         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  60 };
  61
  62 static const struct genl_multicast_group nl80211_mcgrps[] = {
  63         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  64         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  65         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  66         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  67         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  68 #ifdef CONFIG_NL80211_TESTMODE
  69         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  70 #endif
  71 };
  72
  73 /* returns ERR_PTR values */
  74 static struct wireless_dev *
  75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  76 {
  77         struct cfg80211_registered_device *rdev;
  78         struct wireless_dev *result = NULL;
  79         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  80         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  81         u64 wdev_id;
  82         int wiphy_idx = -1;
  83         int ifidx = -1;
  84
  85         ASSERT_RTNL();
  86
  87         if (!have_ifidx && !have_wdev_id)
  88                 return ERR_PTR(-EINVAL);
  89
  90         if (have_ifidx)
  91                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  92         if (have_wdev_id) {
  93                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  94                 wiphy_idx = wdev_id >> 32;
  95         }
  96
  97         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  98                 struct wireless_dev *wdev;
  99
 100                 if (wiphy_net(&rdev->wiphy) != netns)
 101                         continue;
 102
 103                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 104                         continue;
 105
 106                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 107                         if (have_ifidx && wdev->netdev &&
 108                             wdev->netdev->ifindex == ifidx) {
 109                                 result = wdev;
 110                                 break;
 111                         }
 112                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 113                                 result = wdev;
 114                                 break;
 115                         }
 116                 }
 117
 118                 if (result)
 119                         break;
 120         }
 121
 122         if (result)
 123                 return result;
 124         return ERR_PTR(-ENODEV);
 125 }
 126
 127 static struct cfg80211_registered_device *
 128 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 129 {
 130         struct cfg80211_registered_device *rdev = NULL, *tmp;
 131         struct net_device *netdev;
 132
 133         ASSERT_RTNL();
 134
 135         if (!attrs[NL80211_ATTR_WIPHY] &&
 136             !attrs[NL80211_ATTR_IFINDEX] &&
 137             !attrs[NL80211_ATTR_WDEV])
 138                 return ERR_PTR(-EINVAL);
 139
 140         if (attrs[NL80211_ATTR_WIPHY])
 141                 rdev = cfg80211_rdev_by_wiphy_idx(
 142                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 143
 144         if (attrs[NL80211_ATTR_WDEV]) {
 145                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 146                 struct wireless_dev *wdev;
 147                 bool found = false;
 148
 149                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 150                 if (tmp) {
 151                         /* make sure wdev exists */
 152                         list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
 153                                 if (wdev->identifier != (u32)wdev_id)
 154                                         continue;
 155                                 found = true;
 156                                 break;
 157                         }
 158
 159                         if (!found)
 160                                 tmp = NULL;
 161
 162                         if (rdev && tmp != rdev)
 163                                 return ERR_PTR(-EINVAL);
 164                         rdev = tmp;
 165                 }
 166         }
 167
 168         if (attrs[NL80211_ATTR_IFINDEX]) {
 169                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 170
 171                 netdev = __dev_get_by_index(netns, ifindex);
 172                 if (netdev) {
 173                         if (netdev->ieee80211_ptr)
 174                                 tmp = wiphy_to_rdev(
 175                                         netdev->ieee80211_ptr->wiphy);
 176                         else
 177                                 tmp = NULL;
 178
 179                         /* not wireless device -- return error */
 180                         if (!tmp)
 181                                 return ERR_PTR(-EINVAL);
 182
 183                         /* mismatch -- return error */
 184                         if (rdev && tmp != rdev)
 185                                 return ERR_PTR(-EINVAL);
 186
 187                         rdev = tmp;
 188                 }
 189         }
 190
 191         if (!rdev)
 192                 return ERR_PTR(-ENODEV);
 193
 194         if (netns != wiphy_net(&rdev->wiphy))
 195                 return ERR_PTR(-ENODEV);
 196
 197         return rdev;
 198 }
 199
 200 /*
 201  * This function returns a pointer to the driver
 202  * that the genl_info item that is passed refers to.
 203  *
 204  * The result of this can be a PTR_ERR and hence must
 205  * be checked with IS_ERR() for errors.
 206  */
 207 static struct cfg80211_registered_device *
 208 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 209 {
 210         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 211 }
 212
 213 /* policy for the attributes */
 214 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 215         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 216         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 217                                       .len = 20-1 },
 218         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 219
 220         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 221         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 222         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 223         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 224         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 225
 226         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 227         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 228         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 230         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 231         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 232
 233         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 234         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 235         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 236
 237         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 238         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 239
 240         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 241         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 242                                     .len = WLAN_MAX_KEY_LEN },
 243         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 244         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 245         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 246         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 247         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 248
 249         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 250         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 251         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 252                                        .len = IEEE80211_MAX_DATA_LEN },
 253         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 254                                        .len = IEEE80211_MAX_DATA_LEN },
 255         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 256         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 257         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 258         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 259                                                .len = NL80211_MAX_SUPP_RATES },
 260         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 261         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 262         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 263         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 264                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 265         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 266
 267         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 268         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 269
 270         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 271         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 273         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 274                                            .len = NL80211_MAX_SUPP_RATES },
 275         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 276
 277         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 278         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 279
 280         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 281
 282         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 283         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 284                               .len = IEEE80211_MAX_DATA_LEN },
 285         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 286         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 287
 288         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 289                                 .len = IEEE80211_MAX_SSID_LEN },
 290         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 291         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 292         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 293         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 295         [NL80211_ATTR_STA_FLAGS2] = {
 296                 .len = sizeof(struct nl80211_sta_flag_update),
 297         },
 298         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 300         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 303         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 304         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 305         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 306         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 307                                  .len = WLAN_PMKID_LEN },
 308         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 309         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 310         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 311         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 312                                  .len = IEEE80211_MAX_DATA_LEN },
 313         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 314         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 315         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 316         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 317         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 318         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 319         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 320         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 321         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 322         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 323         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 324         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 325         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 328         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 329         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 330         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 331         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 332         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 333                                          .len = IEEE80211_MAX_DATA_LEN },
 334         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 335                                          .len = IEEE80211_MAX_DATA_LEN },
 336         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 337         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 339         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 340         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 342         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 347                                       .len = IEEE80211_MAX_DATA_LEN },
 348         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 351                 .len = NL80211_HT_CAPABILITY_LEN
 352         },
 353         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 354         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 355         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 356         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 357         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 358         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 359         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 360         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 361         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 362         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 363         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 364         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 365         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 366         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 367         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 368         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 369         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 370                 .len = NL80211_VHT_CAPABILITY_LEN,
 371         },
 372         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 373         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 374                                   .len = IEEE80211_MAX_DATA_LEN },
 375         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 376         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 377         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 378         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 379         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 380         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 381         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 382         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 383         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 384         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 385         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 386         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 387         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 388         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 389                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 390         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 391         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 392         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 393         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 395         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 396         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 397         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 398         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 399         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 400         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 401         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 402         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 403         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 404         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 405         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 406         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 407         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 408         [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
 409                 .len = VHT_MUMIMO_GROUPS_DATA_LEN
 410         },
 411         [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
 412 };
 413
 414 /* policy for the key attributes */
 415 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 416         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 417         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 418         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 419         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 420         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 421         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 422         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 423         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 424 };
 425
 426 /* policy for the key default flags */
 427 static const struct nla_policy
 428 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 429         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 430         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 431 };
 432
 433 /* policy for WoWLAN attributes */
 434 static const struct nla_policy
 435 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 436         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 437         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 438         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 439         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 440         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 441         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 442         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 443         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 444         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 445         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 446 };
 447
 448 static const struct nla_policy
 449 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 450         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 451         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 452         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 453         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 454         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 455         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 456         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 457                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 458         },
 459         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 460                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 461         },
 462         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 463         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 464         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 465 };
 466
 467 /* policy for coalesce rule attributes */
 468 static const struct nla_policy
 469 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 470         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 471         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 472         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 473 };
 474
 475 /* policy for GTK rekey offload attributes */
 476 static const struct nla_policy
 477 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 478         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 479         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 480         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 481 };
 482
 483 static const struct nla_policy
 484 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 485         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 486                                                  .len = IEEE80211_MAX_SSID_LEN },
 487         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 488 };
 489
 490 static const struct nla_policy
 491 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 492         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 493         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 494 };
 495
 496 static const struct nla_policy
 497 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 498         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 499         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 500         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 501                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 502         },
 503 };
 504
 505 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 506                                      struct netlink_callback *cb,
 507                                      struct cfg80211_registered_device **rdev,
 508                                      struct wireless_dev **wdev)
 509 {
 510         int err;
 511
 512         rtnl_lock();
 513
 514         if (!cb->args[0]) {
 515                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 516                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 517                                   nl80211_policy);
 518                 if (err)
 519                         goto out_unlock;
 520
 521                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 522                                                    nl80211_fam.attrbuf);
 523                 if (IS_ERR(*wdev)) {
 524                         err = PTR_ERR(*wdev);
 525                         goto out_unlock;
 526                 }
 527                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 528                 /* 0 is the first index - add 1 to parse only once */
 529                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 530                 cb->args[1] = (*wdev)->identifier;
 531         } else {
 532                 /* subtract the 1 again here */
 533                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 534                 struct wireless_dev *tmp;
 535
 536                 if (!wiphy) {
 537                         err = -ENODEV;
 538                         goto out_unlock;
 539                 }
 540                 *rdev = wiphy_to_rdev(wiphy);
 541                 *wdev = NULL;
 542
 543                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 544                         if (tmp->identifier == cb->args[1]) {
 545                                 *wdev = tmp;
 546                                 break;
 547                         }
 548                 }
 549
 550                 if (!*wdev) {
 551                         err = -ENODEV;
 552                         goto out_unlock;
 553                 }
 554         }
 555
 556         return 0;
 557  out_unlock:
 558         rtnl_unlock();
 559         return err;
 560 }
 561
 562 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev)
 563 {
 564         rtnl_unlock();
 565 }
 566
 567 /* IE validation */
 568 static bool is_valid_ie_attr(const struct nlattr *attr)
 569 {
 570         const u8 *pos;
 571         int len;
 572
 573         if (!attr)
 574                 return true;
 575
 576         pos = nla_data(attr);
 577         len = nla_len(attr);
 578
 579         while (len) {
 580                 u8 elemlen;
 581
 582                 if (len < 2)
 583                         return false;
 584                 len -= 2;
 585
 586                 elemlen = pos[1];
 587                 if (elemlen > len)
 588                         return false;
 589
 590                 len -= elemlen;
 591                 pos += 2 + elemlen;
 592         }
 593
 594         return true;
 595 }
 596
 597 /* message building helper */
 598 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 599                                    int flags, u8 cmd)
 600 {
 601         /* since there is no private header just add the generic one */
 602         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 603 }
 604
 605 static int nl80211_msg_put_channel(struct sk_buff *msg,
 606                                    struct ieee80211_channel *chan,
 607                                    bool large)
 608 {
 609         /* Some channels must be completely excluded from the
 610          * list to protect old user-space tools from breaking
 611          */
 612         if (!large && chan->flags &
 613             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 614                 return 0;
 615
 616         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 617                         chan->center_freq))
 618                 goto nla_put_failure;
 619
 620         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 621             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 622                 goto nla_put_failure;
 623         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 624                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 625                         goto nla_put_failure;
 626                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 627                         goto nla_put_failure;
 628         }
 629         if (chan->flags & IEEE80211_CHAN_RADAR) {
 630                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 631                         goto nla_put_failure;
 632                 if (large) {
 633                         u32 time;
 634
 635                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 636
 637                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 638                                         chan->dfs_state))
 639                                 goto nla_put_failure;
 640                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 641                                         time))
 642                                 goto nla_put_failure;
 643                         if (nla_put_u32(msg,
 644                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 645                                         chan->dfs_cac_ms))
 646                                 goto nla_put_failure;
 647                 }
 648         }
 649
 650         if (large) {
 651                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 652                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 653                         goto nla_put_failure;
 654                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 655                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 656                         goto nla_put_failure;
 657                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 658                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 659                         goto nla_put_failure;
 660                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 661                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 662                         goto nla_put_failure;
 663                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 664                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 665                         goto nla_put_failure;
 666                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 667                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 668                         goto nla_put_failure;
 669                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 670                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 671                         goto nla_put_failure;
 672                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 673                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 674                         goto nla_put_failure;
 675         }
 676
 677         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 678                         DBM_TO_MBM(chan->max_power)))
 679                 goto nla_put_failure;
 680
 681         return 0;
 682
 683  nla_put_failure:
 684         return -ENOBUFS;
 685 }
 686
 687 /* netlink command implementations */
 688
 689 struct key_parse {
 690         struct key_params p;
 691         int idx;
 692         int type;
 693         bool def, defmgmt;
 694         bool def_uni, def_multi;
 695 };
 696
 697 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 698 {
 699         struct nlattr *tb[NL80211_KEY_MAX + 1];
 700         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 701                                    nl80211_key_policy);
 702         if (err)
 703                 return err;
 704
 705         k->def = !!tb[NL80211_KEY_DEFAULT];
 706         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 707
 708         if (k->def) {
 709                 k->def_uni = true;
 710                 k->def_multi = true;
 711         }
 712         if (k->defmgmt)
 713                 k->def_multi = true;
 714
 715         if (tb[NL80211_KEY_IDX])
 716                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 717
 718         if (tb[NL80211_KEY_DATA]) {
 719                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 720                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 721         }
 722
 723         if (tb[NL80211_KEY_SEQ]) {
 724                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 725                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 726         }
 727
 728         if (tb[NL80211_KEY_CIPHER])
 729                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 730
 731         if (tb[NL80211_KEY_TYPE]) {
 732                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 733                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 734                         return -EINVAL;
 735         }
 736
 737         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 738                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 739
 740                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 741                                        tb[NL80211_KEY_DEFAULT_TYPES],
 742                                        nl80211_key_default_policy);
 743                 if (err)
 744                         return err;
 745
 746                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 747                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 754 {
 755         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 756                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 757                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 758         }
 759
 760         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 761                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 762                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 763         }
 764
 765         if (info->attrs[NL80211_ATTR_KEY_IDX])
 766                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 767
 768         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 769                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 770
 771         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 772         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 773
 774         if (k->def) {
 775                 k->def_uni = true;
 776                 k->def_multi = true;
 777         }
 778         if (k->defmgmt)
 779                 k->def_multi = true;
 780
 781         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 782                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 783                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 784                         return -EINVAL;
 785         }
 786
 787         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 788                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 789                 int err = nla_parse_nested(
 790                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 791                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 792                                 nl80211_key_default_policy);
 793                 if (err)
 794                         return err;
 795
 796                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 797                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 798         }
 799
 800         return 0;
 801 }
 802
 803 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 804 {
 805         int err;
 806
 807         memset(k, 0, sizeof(*k));
 808         k->idx = -1;
 809         k->type = -1;
 810
 811         if (info->attrs[NL80211_ATTR_KEY])
 812                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 813         else
 814                 err = nl80211_parse_key_old(info, k);
 815
 816         if (err)
 817                 return err;
 818
 819         if (k->def && k->defmgmt)
 820                 return -EINVAL;
 821
 822         if (k->defmgmt) {
 823                 if (k->def_uni || !k->def_multi)
 824                         return -EINVAL;
 825         }
 826
 827         if (k->idx != -1) {
 828                 if (k->defmgmt) {
 829                         if (k->idx < 4 || k->idx > 5)
 830                                 return -EINVAL;
 831                 } else if (k->def) {
 832                         if (k->idx < 0 || k->idx > 3)
 833                                 return -EINVAL;
 834                 } else {
 835                         if (k->idx < 0 || k->idx > 5)
 836                                 return -EINVAL;
 837                 }
 838         }
 839
 840         return 0;
 841 }
 842
 843 static struct cfg80211_cached_keys *
 844 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 845                        struct nlattr *keys, bool *no_ht)
 846 {
 847         struct key_parse parse;
 848         struct nlattr *key;
 849         struct cfg80211_cached_keys *result;
 850         int rem, err, def = 0;
 851         bool have_key = false;
 852
 853         nla_for_each_nested(key, keys, rem) {
 854                 have_key = true;
 855                 break;
 856         }
 857
 858         if (!have_key)
 859                 return NULL;
 860
 861         result = kzalloc(sizeof(*result), GFP_KERNEL);
 862         if (!result)
 863                 return ERR_PTR(-ENOMEM);
 864
 865         result->def = -1;
 866
 867         nla_for_each_nested(key, keys, rem) {
 868                 memset(&parse, 0, sizeof(parse));
 869                 parse.idx = -1;
 870
 871                 err = nl80211_parse_key_new(key, &parse);
 872                 if (err)
 873                         goto error;
 874                 err = -EINVAL;
 875                 if (!parse.p.key)
 876                         goto error;
 877                 if (parse.idx < 0 || parse.idx > 3)
 878                         goto error;
 879                 if (parse.def) {
 880                         if (def)
 881                                 goto error;
 882                         def = 1;
 883                         result->def = parse.idx;
 884                         if (!parse.def_uni || !parse.def_multi)
 885                                 goto error;
 886                 } else if (parse.defmgmt)
 887                         goto error;
 888                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 889                                                      parse.idx, false, NULL);
 890                 if (err)
 891                         goto error;
 892                 if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 893                     parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
 894                         err = -EINVAL;
 895                         goto error;
 896                 }
 897                 result->params[parse.idx].cipher = parse.p.cipher;
 898                 result->params[parse.idx].key_len = parse.p.key_len;
 899                 result->params[parse.idx].key = result->data[parse.idx];
 900                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 901
 902                 /* must be WEP key if we got here */
 903                 if (no_ht)
 904                         *no_ht = true;
 905         }
 906
 907         if (result->def < 0) {
 908                 err = -EINVAL;
 909                 goto error;
 910         }
 911
 912         return result;
 913  error:
 914         kfree(result);
 915         return ERR_PTR(err);
 916 }
 917
 918 static int nl80211_key_allowed(struct wireless_dev *wdev)
 919 {
 920         ASSERT_WDEV_LOCK(wdev);
 921
 922         switch (wdev->iftype) {
 923         case NL80211_IFTYPE_AP:
 924         case NL80211_IFTYPE_AP_VLAN:
 925         case NL80211_IFTYPE_P2P_GO:
 926         case NL80211_IFTYPE_MESH_POINT:
 927                 break;
 928         case NL80211_IFTYPE_ADHOC:
 929         case NL80211_IFTYPE_STATION:
 930         case NL80211_IFTYPE_P2P_CLIENT:
 931                 if (!wdev->current_bss)
 932                         return -ENOLINK;
 933                 break;
 934         case NL80211_IFTYPE_UNSPECIFIED:
 935         case NL80211_IFTYPE_OCB:
 936         case NL80211_IFTYPE_MONITOR:
 937         case NL80211_IFTYPE_P2P_DEVICE:
 938         case NL80211_IFTYPE_WDS:
 939         case NUM_NL80211_IFTYPES:
 940                 return -EINVAL;
 941         }
 942
 943         return 0;
 944 }
 945
 946 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 947                                                         struct nlattr *tb)
 948 {
 949         struct ieee80211_channel *chan;
 950
 951         if (tb == NULL)
 952                 return NULL;
 953         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 954         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 955                 return NULL;
 956         return chan;
 957 }
 958
 959 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 960 {
 961         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 962         int i;
 963
 964         if (!nl_modes)
 965                 goto nla_put_failure;
 966
 967         i = 0;
 968         while (ifmodes) {
 969                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 970                         goto nla_put_failure;
 971                 ifmodes >>= 1;
 972                 i++;
 973         }
 974
 975         nla_nest_end(msg, nl_modes);
 976         return 0;
 977
 978 nla_put_failure:
 979         return -ENOBUFS;
 980 }
 981
 982 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 983                                           struct sk_buff *msg,
 984                                           bool large)
 985 {
 986         struct nlattr *nl_combis;
 987         int i, j;
 988
 989         nl_combis = nla_nest_start(msg,
 990                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 991         if (!nl_combis)
 992                 goto nla_put_failure;
 993
 994         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 995                 const struct ieee80211_iface_combination *c;
 996                 struct nlattr *nl_combi, *nl_limits;
 997
 998                 c = &wiphy->iface_combinations[i];
 999
1000                 nl_combi = nla_nest_start(msg, i + 1);
1001                 if (!nl_combi)
1002                         goto nla_put_failure;
1003
1004                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
1005                 if (!nl_limits)
1006                         goto nla_put_failure;
1007
1008                 for (j = 0; j < c->n_limits; j++) {
1009                         struct nlattr *nl_limit;
1010
1011                         nl_limit = nla_nest_start(msg, j + 1);
1012                         if (!nl_limit)
1013                                 goto nla_put_failure;
1014                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1015                                         c->limits[j].max))
1016                                 goto nla_put_failure;
1017                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1018                                                 c->limits[j].types))
1019                                 goto nla_put_failure;
1020                         nla_nest_end(msg, nl_limit);
1021                 }
1022
1023                 nla_nest_end(msg, nl_limits);
1024
1025                 if (c->beacon_int_infra_match &&
1026                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1027                         goto nla_put_failure;
1028                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1029                                 c->num_different_channels) ||
1030                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1031                                 c->max_interfaces))
1032                         goto nla_put_failure;
1033                 if (large &&
1034                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1035                                 c->radar_detect_widths) ||
1036                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1037                                 c->radar_detect_regions)))
1038                         goto nla_put_failure;
1039
1040                 nla_nest_end(msg, nl_combi);
1041         }
1042
1043         nla_nest_end(msg, nl_combis);
1044
1045         return 0;
1046 nla_put_failure:
1047         return -ENOBUFS;
1048 }
1049
1050 #ifdef CONFIG_PM
1051 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1052                                         struct sk_buff *msg)
1053 {
1054         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1055         struct nlattr *nl_tcp;
1056
1057         if (!tcp)
1058                 return 0;
1059
1060         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1061         if (!nl_tcp)
1062                 return -ENOBUFS;
1063
1064         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1065                         tcp->data_payload_max))
1066                 return -ENOBUFS;
1067
1068         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1069                         tcp->data_payload_max))
1070                 return -ENOBUFS;
1071
1072         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1073                 return -ENOBUFS;
1074
1075         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1076                                 sizeof(*tcp->tok), tcp->tok))
1077                 return -ENOBUFS;
1078
1079         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1080                         tcp->data_interval_max))
1081                 return -ENOBUFS;
1082
1083         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1084                         tcp->wake_payload_max))
1085                 return -ENOBUFS;
1086
1087         nla_nest_end(msg, nl_tcp);
1088         return 0;
1089 }
1090
1091 static int nl80211_send_wowlan(struct sk_buff *msg,
1092                                struct cfg80211_registered_device *rdev,
1093                                bool large)
1094 {
1095         struct nlattr *nl_wowlan;
1096
1097         if (!rdev->wiphy.wowlan)
1098                 return 0;
1099
1100         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1101         if (!nl_wowlan)
1102                 return -ENOBUFS;
1103
1104         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1105              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1106             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1107              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1108             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1109              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1110             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1111              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1112             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1113              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1114             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1115              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1116             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1117              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1118             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1119              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1120                 return -ENOBUFS;
1121
1122         if (rdev->wiphy.wowlan->n_patterns) {
1123                 struct nl80211_pattern_support pat = {
1124                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1125                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1126                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1127                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1128                 };
1129
1130                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1131                             sizeof(pat), &pat))
1132                         return -ENOBUFS;
1133         }
1134
1135         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1136             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1137                         rdev->wiphy.wowlan->max_nd_match_sets))
1138                 return -ENOBUFS;
1139
1140         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1141                 return -ENOBUFS;
1142
1143         nla_nest_end(msg, nl_wowlan);
1144
1145         return 0;
1146 }
1147 #endif
1148
1149 static int nl80211_send_coalesce(struct sk_buff *msg,
1150                                  struct cfg80211_registered_device *rdev)
1151 {
1152         struct nl80211_coalesce_rule_support rule;
1153
1154         if (!rdev->wiphy.coalesce)
1155                 return 0;
1156
1157         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1158         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1159         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1160         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1161         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1162         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1163
1164         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1165                 return -ENOBUFS;
1166
1167         return 0;
1168 }
1169
1170 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1171                                       struct ieee80211_supported_band *sband)
1172 {
1173         struct nlattr *nl_rates, *nl_rate;
1174         struct ieee80211_rate *rate;
1175         int i;
1176
1177         /* add HT info */
1178         if (sband->ht_cap.ht_supported &&
1179             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1180                      sizeof(sband->ht_cap.mcs),
1181                      &sband->ht_cap.mcs) ||
1182              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1183                          sband->ht_cap.cap) ||
1184              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1185                         sband->ht_cap.ampdu_factor) ||
1186              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1187                         sband->ht_cap.ampdu_density)))
1188                 return -ENOBUFS;
1189
1190         /* add VHT info */
1191         if (sband->vht_cap.vht_supported &&
1192             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1193                      sizeof(sband->vht_cap.vht_mcs),
1194                      &sband->vht_cap.vht_mcs) ||
1195              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1196                          sband->vht_cap.cap)))
1197                 return -ENOBUFS;
1198
1199         /* add bitrates */
1200         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1201         if (!nl_rates)
1202                 return -ENOBUFS;
1203
1204         for (i = 0; i < sband->n_bitrates; i++) {
1205                 nl_rate = nla_nest_start(msg, i);
1206                 if (!nl_rate)
1207                         return -ENOBUFS;
1208
1209                 rate = &sband->bitrates[i];
1210                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1211                                 rate->bitrate))
1212                         return -ENOBUFS;
1213                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1214                     nla_put_flag(msg,
1215                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1216                         return -ENOBUFS;
1217
1218                 nla_nest_end(msg, nl_rate);
1219         }
1220
1221         nla_nest_end(msg, nl_rates);
1222
1223         return 0;
1224 }
1225
1226 static int
1227 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1228                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1229 {
1230         u16 stypes;
1231         struct nlattr *nl_ftypes, *nl_ifs;
1232         enum nl80211_iftype ift;
1233         int i;
1234
1235         if (!mgmt_stypes)
1236                 return 0;
1237
1238         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1239         if (!nl_ifs)
1240                 return -ENOBUFS;
1241
1242         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1243                 nl_ftypes = nla_nest_start(msg, ift);
1244                 if (!nl_ftypes)
1245                         return -ENOBUFS;
1246                 i = 0;
1247                 stypes = mgmt_stypes[ift].tx;
1248                 while (stypes) {
1249                         if ((stypes & 1) &&
1250                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1251                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1252                                 return -ENOBUFS;
1253                         stypes >>= 1;
1254                         i++;
1255                 }
1256                 nla_nest_end(msg, nl_ftypes);
1257         }
1258
1259         nla_nest_end(msg, nl_ifs);
1260
1261         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1262         if (!nl_ifs)
1263                 return -ENOBUFS;
1264
1265         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1266                 nl_ftypes = nla_nest_start(msg, ift);
1267                 if (!nl_ftypes)
1268                         return -ENOBUFS;
1269                 i = 0;
1270                 stypes = mgmt_stypes[ift].rx;
1271                 while (stypes) {
1272                         if ((stypes & 1) &&
1273                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1274                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1275                                 return -ENOBUFS;
1276                         stypes >>= 1;
1277                         i++;
1278                 }
1279                 nla_nest_end(msg, nl_ftypes);
1280         }
1281         nla_nest_end(msg, nl_ifs);
1282
1283         return 0;
1284 }
1285
1286 struct nl80211_dump_wiphy_state {
1287         s64 filter_wiphy;
1288         long start;
1289         long split_start, band_start, chan_start, capa_start;
1290         bool split;
1291 };
1292
1293 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1294                               enum nl80211_commands cmd,
1295                               struct sk_buff *msg, u32 portid, u32 seq,
1296                               int flags, struct nl80211_dump_wiphy_state *state)
1297 {
1298         void *hdr;
1299         struct nlattr *nl_bands, *nl_band;
1300         struct nlattr *nl_freqs, *nl_freq;
1301         struct nlattr *nl_cmds;
1302         enum nl80211_band band;
1303         struct ieee80211_channel *chan;
1304         int i;
1305         const struct ieee80211_txrx_stypes *mgmt_stypes =
1306                                 rdev->wiphy.mgmt_stypes;
1307         u32 features;
1308
1309         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1310         if (!hdr)
1311                 return -ENOBUFS;
1312
1313         if (WARN_ON(!state))
1314                 return -EINVAL;
1315
1316         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1317             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1318                            wiphy_name(&rdev->wiphy)) ||
1319             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1320                         cfg80211_rdev_list_generation))
1321                 goto nla_put_failure;
1322
1323         if (cmd != NL80211_CMD_NEW_WIPHY)
1324                 goto finish;
1325
1326         switch (state->split_start) {
1327         case 0:
1328                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1329                                rdev->wiphy.retry_short) ||
1330                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1331                                rdev->wiphy.retry_long) ||
1332                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1333                                 rdev->wiphy.frag_threshold) ||
1334                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1335                                 rdev->wiphy.rts_threshold) ||
1336                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1337                                rdev->wiphy.coverage_class) ||
1338                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1339                                rdev->wiphy.max_scan_ssids) ||
1340                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1341                                rdev->wiphy.max_sched_scan_ssids) ||
1342                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1343                                 rdev->wiphy.max_scan_ie_len) ||
1344                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1345                                 rdev->wiphy.max_sched_scan_ie_len) ||
1346                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1347                                rdev->wiphy.max_match_sets) ||
1348                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1349                                 rdev->wiphy.max_sched_scan_plans) ||
1350                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1351                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1352                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1353                                 rdev->wiphy.max_sched_scan_plan_iterations))
1354                         goto nla_put_failure;
1355
1356                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1357                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1358                         goto nla_put_failure;
1359                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1360                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1361                         goto nla_put_failure;
1362                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1363                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1364                         goto nla_put_failure;
1365                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1366                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1367                         goto nla_put_failure;
1368                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1369                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1370                         goto nla_put_failure;
1371                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1372                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1373                         goto nla_put_failure;
1374                 state->split_start++;
1375                 if (state->split)
1376                         break;
1377         case 1:
1378                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1379                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1380                             rdev->wiphy.cipher_suites))
1381                         goto nla_put_failure;
1382
1383                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1384                                rdev->wiphy.max_num_pmkids))
1385                         goto nla_put_failure;
1386
1387                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1388                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1389                         goto nla_put_failure;
1390
1391                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1392                                 rdev->wiphy.available_antennas_tx) ||
1393                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1394                                 rdev->wiphy.available_antennas_rx))
1395                         goto nla_put_failure;
1396
1397                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1398                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1399                                 rdev->wiphy.probe_resp_offload))
1400                         goto nla_put_failure;
1401
1402                 if ((rdev->wiphy.available_antennas_tx ||
1403                      rdev->wiphy.available_antennas_rx) &&
1404                     rdev->ops->get_antenna) {
1405                         u32 tx_ant = 0, rx_ant = 0;
1406                         int res;
1407
1408                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1409                         if (!res) {
1410                                 if (nla_put_u32(msg,
1411                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1412                                                 tx_ant) ||
1413                                     nla_put_u32(msg,
1414                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1415                                                 rx_ant))
1416                                         goto nla_put_failure;
1417                         }
1418                 }
1419
1420                 state->split_start++;
1421                 if (state->split)
1422                         break;
1423         case 2:
1424                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1425                                         rdev->wiphy.interface_modes))
1426                                 goto nla_put_failure;
1427                 state->split_start++;
1428                 if (state->split)
1429                         break;
1430         case 3:
1431                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1432                 if (!nl_bands)
1433                         goto nla_put_failure;
1434
1435                 for (band = state->band_start;
1436                      band < NUM_NL80211_BANDS; band++) {
1437                         struct ieee80211_supported_band *sband;
1438
1439                         sband = rdev->wiphy.bands[band];
1440
1441                         if (!sband)
1442                                 continue;
1443
1444                         nl_band = nla_nest_start(msg, band);
1445                         if (!nl_band)
1446                                 goto nla_put_failure;
1447
1448                         switch (state->chan_start) {
1449                         case 0:
1450                                 if (nl80211_send_band_rateinfo(msg, sband))
1451                                         goto nla_put_failure;
1452                                 state->chan_start++;
1453                                 if (state->split)
1454                                         break;
1455                         default:
1456                                 /* add frequencies */
1457                                 nl_freqs = nla_nest_start(
1458                                         msg, NL80211_BAND_ATTR_FREQS);
1459                                 if (!nl_freqs)
1460                                         goto nla_put_failure;
1461
1462                                 for (i = state->chan_start - 1;
1463                                      i < sband->n_channels;
1464                                      i++) {
1465                                         nl_freq = nla_nest_start(msg, i);
1466                                         if (!nl_freq)
1467                                                 goto nla_put_failure;
1468
1469                                         chan = &sband->channels[i];
1470
1471                                         if (nl80211_msg_put_channel(
1472                                                         msg, chan,
1473                                                         state->split))
1474                                                 goto nla_put_failure;
1475
1476                                         nla_nest_end(msg, nl_freq);
1477                                         if (state->split)
1478                                                 break;
1479                                 }
1480                                 if (i < sband->n_channels)
1481                                         state->chan_start = i + 2;
1482                                 else
1483                                         state->chan_start = 0;
1484                                 nla_nest_end(msg, nl_freqs);
1485                         }
1486
1487                         nla_nest_end(msg, nl_band);
1488
1489                         if (state->split) {
1490                                 /* start again here */
1491                                 if (state->chan_start)
1492                                         band--;
1493                                 break;
1494                         }
1495                 }
1496                 nla_nest_end(msg, nl_bands);
1497
1498                 if (band < NUM_NL80211_BANDS)
1499                         state->band_start = band + 1;
1500                 else
1501                         state->band_start = 0;
1502
1503                 /* if bands & channels are done, continue outside */
1504                 if (state->band_start == 0 && state->chan_start == 0)
1505                         state->split_start++;
1506                 if (state->split)
1507                         break;
1508         case 4:
1509                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1510                 if (!nl_cmds)
1511                         goto nla_put_failure;
1512
1513                 i = 0;
1514 #define CMD(op, n)                                                      \
1515                  do {                                                   \
1516                         if (rdev->ops->op) {                            \
1517                                 i++;                                    \
1518                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1519                                         goto nla_put_failure;           \
1520                         }                                               \
1521                 } while (0)
1522
1523                 CMD(add_virtual_intf, NEW_INTERFACE);
1524                 CMD(change_virtual_intf, SET_INTERFACE);
1525                 CMD(add_key, NEW_KEY);
1526                 CMD(start_ap, START_AP);
1527                 CMD(add_station, NEW_STATION);
1528                 CMD(add_mpath, NEW_MPATH);
1529                 CMD(update_mesh_config, SET_MESH_CONFIG);
1530                 CMD(change_bss, SET_BSS);
1531                 CMD(auth, AUTHENTICATE);
1532                 CMD(assoc, ASSOCIATE);
1533                 CMD(deauth, DEAUTHENTICATE);
1534                 CMD(disassoc, DISASSOCIATE);
1535                 CMD(join_ibss, JOIN_IBSS);
1536                 CMD(join_mesh, JOIN_MESH);
1537                 CMD(set_pmksa, SET_PMKSA);
1538                 CMD(del_pmksa, DEL_PMKSA);
1539                 CMD(flush_pmksa, FLUSH_PMKSA);
1540                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1541                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1542                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1543                 CMD(mgmt_tx, FRAME);
1544                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1545                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1546                         i++;
1547                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1548                                 goto nla_put_failure;
1549                 }
1550                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1551                     rdev->ops->join_mesh) {
1552                         i++;
1553                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1554                                 goto nla_put_failure;
1555                 }
1556                 CMD(set_wds_peer, SET_WDS_PEER);
1557                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1558                         CMD(tdls_mgmt, TDLS_MGMT);
1559                         CMD(tdls_oper, TDLS_OPER);
1560                 }
1561                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1562                         CMD(sched_scan_start, START_SCHED_SCAN);
1563                 CMD(probe_client, PROBE_CLIENT);
1564                 CMD(set_noack_map, SET_NOACK_MAP);
1565                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1566                         i++;
1567                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1568                                 goto nla_put_failure;
1569                 }
1570                 CMD(start_p2p_device, START_P2P_DEVICE);
1571                 CMD(set_mcast_rate, SET_MCAST_RATE);
1572 #ifdef CONFIG_NL80211_TESTMODE
1573                 CMD(testmode_cmd, TESTMODE);
1574 #endif
1575                 if (state->split) {
1576                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1577                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1578                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1579                                 CMD(channel_switch, CHANNEL_SWITCH);
1580                         CMD(set_qos_map, SET_QOS_MAP);
1581                         if (rdev->wiphy.features &
1582                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1583                                 CMD(add_tx_ts, ADD_TX_TS);
1584                 }
1585                 /* add into the if now */
1586 #undef CMD
1587
1588                 if (rdev->ops->connect || rdev->ops->auth) {
1589                         i++;
1590                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1591                                 goto nla_put_failure;
1592                 }
1593
1594                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1595                         i++;
1596                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1597                                 goto nla_put_failure;
1598                 }
1599
1600                 nla_nest_end(msg, nl_cmds);
1601                 state->split_start++;
1602                 if (state->split)
1603                         break;
1604         case 5:
1605                 if (rdev->ops->remain_on_channel &&
1606                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1607                     nla_put_u32(msg,
1608                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1609                                 rdev->wiphy.max_remain_on_channel_duration))
1610                         goto nla_put_failure;
1611
1612                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1613                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1614                         goto nla_put_failure;
1615
1616                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1617                         goto nla_put_failure;
1618                 state->split_start++;
1619                 if (state->split)
1620                         break;
1621         case 6:
1622 #ifdef CONFIG_PM
1623                 if (nl80211_send_wowlan(msg, rdev, state->split))
1624                         goto nla_put_failure;
1625                 state->split_start++;
1626                 if (state->split)
1627                         break;
1628 #else
1629                 state->split_start++;
1630 #endif
1631         case 7:
1632                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1633                                         rdev->wiphy.software_iftypes))
1634                         goto nla_put_failure;
1635
1636                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1637                                                    state->split))
1638                         goto nla_put_failure;
1639
1640                 state->split_start++;
1641                 if (state->split)
1642                         break;
1643         case 8:
1644                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1645                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1646                                 rdev->wiphy.ap_sme_capa))
1647                         goto nla_put_failure;
1648
1649                 features = rdev->wiphy.features;
1650                 /*
1651                  * We can only add the per-channel limit information if the
1652                  * dump is split, otherwise it makes it too big. Therefore
1653                  * only advertise it in that case.
1654                  */
1655                 if (state->split)
1656                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1657                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1658                         goto nla_put_failure;
1659
1660                 if (rdev->wiphy.ht_capa_mod_mask &&
1661                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1662                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1663                             rdev->wiphy.ht_capa_mod_mask))
1664                         goto nla_put_failure;
1665
1666                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1667                     rdev->wiphy.max_acl_mac_addrs &&
1668                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1669                                 rdev->wiphy.max_acl_mac_addrs))
1670                         goto nla_put_failure;
1671
1672                 /*
1673                  * Any information below this point is only available to
1674                  * applications that can deal with it being split. This
1675                  * helps ensure that newly added capabilities don't break
1676                  * older tools by overrunning their buffers.
1677                  *
1678                  * We still increment split_start so that in the split
1679                  * case we'll continue with more data in the next round,
1680                  * but break unconditionally so unsplit data stops here.
1681                  */
1682                 state->split_start++;
1683                 break;
1684         case 9:
1685                 if (rdev->wiphy.extended_capabilities &&
1686                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1687                              rdev->wiphy.extended_capabilities_len,
1688                              rdev->wiphy.extended_capabilities) ||
1689                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1690                              rdev->wiphy.extended_capabilities_len,
1691                              rdev->wiphy.extended_capabilities_mask)))
1692                         goto nla_put_failure;
1693
1694                 if (rdev->wiphy.vht_capa_mod_mask &&
1695                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1696                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1697                             rdev->wiphy.vht_capa_mod_mask))
1698                         goto nla_put_failure;
1699
1700                 state->split_start++;
1701                 break;
1702         case 10:
1703                 if (nl80211_send_coalesce(msg, rdev))
1704                         goto nla_put_failure;
1705
1706                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1707                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1708                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1709                         goto nla_put_failure;
1710
1711                 if (rdev->wiphy.max_ap_assoc_sta &&
1712                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1713                                 rdev->wiphy.max_ap_assoc_sta))
1714                         goto nla_put_failure;
1715
1716                 state->split_start++;
1717                 break;
1718         case 11:
1719                 if (rdev->wiphy.n_vendor_commands) {
1720                         const struct nl80211_vendor_cmd_info *info;
1721                         struct nlattr *nested;
1722
1723                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1724                         if (!nested)
1725                                 goto nla_put_failure;
1726
1727                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1728                                 info = &rdev->wiphy.vendor_commands[i].info;
1729                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1730                                         goto nla_put_failure;
1731                         }
1732                         nla_nest_end(msg, nested);
1733                 }
1734
1735                 if (rdev->wiphy.n_vendor_events) {
1736                         const struct nl80211_vendor_cmd_info *info;
1737                         struct nlattr *nested;
1738
1739                         nested = nla_nest_start(msg,
1740                                                 NL80211_ATTR_VENDOR_EVENTS);
1741                         if (!nested)
1742                                 goto nla_put_failure;
1743
1744                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1745                                 info = &rdev->wiphy.vendor_events[i];
1746                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1747                                         goto nla_put_failure;
1748                         }
1749                         nla_nest_end(msg, nested);
1750                 }
1751                 state->split_start++;
1752                 break;
1753         case 12:
1754                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1755                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1756                                rdev->wiphy.max_num_csa_counters))
1757                         goto nla_put_failure;
1758
1759                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1760                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1761                         goto nla_put_failure;
1762
1763                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1764                             sizeof(rdev->wiphy.ext_features),
1765                             rdev->wiphy.ext_features))
1766                         goto nla_put_failure;
1767
1768                 if (rdev->wiphy.bss_select_support) {
1769                         struct nlattr *nested;
1770                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1771
1772                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1773                         if (!nested)
1774                                 goto nla_put_failure;
1775
1776                         i = 0;
1777                         while (bss_select_support) {
1778                                 if ((bss_select_support & 1) &&
1779                                     nla_put_flag(msg, i))
1780                                         goto nla_put_failure;
1781                                 i++;
1782                                 bss_select_support >>= 1;
1783                         }
1784                         nla_nest_end(msg, nested);
1785                 }
1786
1787                 state->split_start++;
1788                 break;
1789         case 13:
1790                 if (rdev->wiphy.num_iftype_ext_capab &&
1791                     rdev->wiphy.iftype_ext_capab) {
1792                         struct nlattr *nested_ext_capab, *nested;
1793
1794                         nested = nla_nest_start(msg,
1795                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1796                         if (!nested)
1797                                 goto nla_put_failure;
1798
1799                         for (i = state->capa_start;
1800                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1801                                 const struct wiphy_iftype_ext_capab *capab;
1802
1803                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1804
1805                                 nested_ext_capab = nla_nest_start(msg, i);
1806                                 if (!nested_ext_capab ||
1807                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1808                                                 capab->iftype) ||
1809                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1810                                             capab->extended_capabilities_len,
1811                                             capab->extended_capabilities) ||
1812                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1813                                             capab->extended_capabilities_len,
1814                                             capab->extended_capabilities_mask))
1815                                         goto nla_put_failure;
1816
1817                                 nla_nest_end(msg, nested_ext_capab);
1818                                 if (state->split)
1819                                         break;
1820                         }
1821                         nla_nest_end(msg, nested);
1822                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1823                                 state->capa_start = i + 1;
1824                                 break;
1825                         }
1826                 }
1827
1828                 /* done */
1829                 state->split_start = 0;
1830                 break;
1831         }
1832  finish:
1833         genlmsg_end(msg, hdr);
1834         return 0;
1835
1836  nla_put_failure:
1837         genlmsg_cancel(msg, hdr);
1838         return -EMSGSIZE;
1839 }
1840
1841 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1842                                     struct netlink_callback *cb,
1843                                     struct nl80211_dump_wiphy_state *state)
1844 {
1845         struct nlattr **tb = nl80211_fam.attrbuf;
1846         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1847                               tb, nl80211_fam.maxattr, nl80211_policy);
1848         /* ignore parse errors for backward compatibility */
1849         if (ret)
1850                 return 0;
1851
1852         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1853         if (tb[NL80211_ATTR_WIPHY])
1854                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1855         if (tb[NL80211_ATTR_WDEV])
1856                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1857         if (tb[NL80211_ATTR_IFINDEX]) {
1858                 struct net_device *netdev;
1859                 struct cfg80211_registered_device *rdev;
1860                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1861
1862                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1863                 if (!netdev)
1864                         return -ENODEV;
1865                 if (netdev->ieee80211_ptr) {
1866                         rdev = wiphy_to_rdev(
1867                                 netdev->ieee80211_ptr->wiphy);
1868                         state->filter_wiphy = rdev->wiphy_idx;
1869                 }
1870         }
1871
1872         return 0;
1873 }
1874
1875 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1876 {
1877         int idx = 0, ret;
1878         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1879         struct cfg80211_registered_device *rdev;
1880
1881         rtnl_lock();
1882         if (!state) {
1883                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1884                 if (!state) {
1885                         rtnl_unlock();
1886                         return -ENOMEM;
1887                 }
1888                 state->filter_wiphy = -1;
1889                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1890                 if (ret) {
1891                         kfree(state);
1892                         rtnl_unlock();
1893                         return ret;
1894                 }
1895                 cb->args[0] = (long)state;
1896         }
1897
1898         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1899                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1900                         continue;
1901                 if (++idx <= state->start)
1902                         continue;
1903                 if (state->filter_wiphy != -1 &&
1904                     state->filter_wiphy != rdev->wiphy_idx)
1905                         continue;
1906                 /* attempt to fit multiple wiphy data chunks into the skb */
1907                 do {
1908                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1909                                                  skb,
1910                                                  NETLINK_CB(cb->skb).portid,
1911                                                  cb->nlh->nlmsg_seq,
1912                                                  NLM_F_MULTI, state);
1913                         if (ret < 0) {
1914                                 /*
1915                                  * If sending the wiphy data didn't fit (ENOBUFS
1916                                  * or EMSGSIZE returned), this SKB is still
1917                                  * empty (so it's not too big because another
1918                                  * wiphy dataset is already in the skb) and
1919                                  * we've not tried to adjust the dump allocation
1920                                  * yet ... then adjust the alloc size to be
1921                                  * bigger, and return 1 but with the empty skb.
1922                                  * This results in an empty message being RX'ed
1923                                  * in userspace, but that is ignored.
1924                                  *
1925                                  * We can then retry with the larger buffer.
1926                                  */
1927                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1928                                     !skb->len && !state->split &&
1929                                     cb->min_dump_alloc < 4096) {
1930                                         cb->min_dump_alloc = 4096;
1931                                         state->split_start = 0;
1932                                         rtnl_unlock();
1933                                         return 1;
1934                                 }
1935                                 idx--;
1936                                 break;
1937                         }
1938                 } while (state->split_start > 0);
1939                 break;
1940         }
1941         rtnl_unlock();
1942
1943         state->start = idx;
1944
1945         return skb->len;
1946 }
1947
1948 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1949 {
1950         kfree((void *)cb->args[0]);
1951         return 0;
1952 }
1953
1954 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1955 {
1956         struct sk_buff *msg;
1957         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1958         struct nl80211_dump_wiphy_state state = {};
1959
1960         msg = nlmsg_new(4096, GFP_KERNEL);
1961         if (!msg)
1962                 return -ENOMEM;
1963
1964         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1965                                info->snd_portid, info->snd_seq, 0,
1966                                &state) < 0) {
1967                 nlmsg_free(msg);
1968                 return -ENOBUFS;
1969         }
1970
1971         return genlmsg_reply(msg, info);
1972 }
1973
1974 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1975         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1976         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1977         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1978         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1979         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1980 };
1981
1982 static int parse_txq_params(struct nlattr *tb[],
1983                             struct ieee80211_txq_params *txq_params)
1984 {
1985         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1986             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1987             !tb[NL80211_TXQ_ATTR_AIFS])
1988                 return -EINVAL;
1989
1990         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1991         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1992         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1993         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1994         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1995
1996         if (txq_params->ac >= NL80211_NUM_ACS)
1997                 return -EINVAL;
1998
1999         return 0;
2000 }
2001
2002 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
2003 {
2004         /*
2005          * You can only set the channel explicitly for WDS interfaces,
2006          * all others have their channel managed via their respective
2007          * "establish a connection" command (connect, join, ...)
2008          *
2009          * For AP/GO and mesh mode, the channel can be set with the
2010          * channel userspace API, but is only stored and passed to the
2011          * low-level driver when the AP starts or the mesh is joined.
2012          * This is for backward compatibility, userspace can also give
2013          * the channel in the start-ap or join-mesh commands instead.
2014          *
2015          * Monitors are special as they are normally slaved to
2016          * whatever else is going on, so they have their own special
2017          * operation to set the monitor channel if possible.
2018          */
2019         return !wdev ||
2020                 wdev->iftype == NL80211_IFTYPE_AP ||
2021                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2022                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2023                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2024 }
2025
2026 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2027                                  struct genl_info *info,
2028                                  struct cfg80211_chan_def *chandef)
2029 {
2030         u32 control_freq;
2031
2032         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2033                 return -EINVAL;
2034
2035         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2036
2037         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2038         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2039         chandef->center_freq1 = control_freq;
2040         chandef->center_freq2 = 0;
2041
2042         /* Primary channel not allowed */
2043         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2044                 return -EINVAL;
2045
2046         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2047                 enum nl80211_channel_type chantype;
2048
2049                 chantype = nla_get_u32(
2050                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2051
2052                 switch (chantype) {
2053                 case NL80211_CHAN_NO_HT:
2054                 case NL80211_CHAN_HT20:
2055                 case NL80211_CHAN_HT40PLUS:
2056                 case NL80211_CHAN_HT40MINUS:
2057                         cfg80211_chandef_create(chandef, chandef->chan,
2058                                                 chantype);
2059                         break;
2060                 default:
2061                         return -EINVAL;
2062                 }
2063         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2064                 chandef->width =
2065                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2066                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2067                         chandef->center_freq1 =
2068                                 nla_get_u32(
2069                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2070                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2071                         chandef->center_freq2 =
2072                                 nla_get_u32(
2073                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2074         }
2075
2076         if (!cfg80211_chandef_valid(chandef))
2077                 return -EINVAL;
2078
2079         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2080                                      IEEE80211_CHAN_DISABLED))
2081                 return -EINVAL;
2082
2083         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2084              chandef->width == NL80211_CHAN_WIDTH_10) &&
2085             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2086                 return -EINVAL;
2087
2088         return 0;
2089 }
2090
2091 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2092                                  struct net_device *dev,
2093                                  struct genl_info *info)
2094 {
2095         struct cfg80211_chan_def chandef;
2096         int result;
2097         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2098         struct wireless_dev *wdev = NULL;
2099
2100         if (dev)
2101                 wdev = dev->ieee80211_ptr;
2102         if (!nl80211_can_set_dev_channel(wdev))
2103                 return -EOPNOTSUPP;
2104         if (wdev)
2105                 iftype = wdev->iftype;
2106
2107         result = nl80211_parse_chandef(rdev, info, &chandef);
2108         if (result)
2109                 return result;
2110
2111         switch (iftype) {
2112         case NL80211_IFTYPE_AP:
2113         case NL80211_IFTYPE_P2P_GO:
2114                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2115                                                    iftype)) {
2116                         result = -EINVAL;
2117                         break;
2118                 }
2119                 if (wdev->beacon_interval) {
2120                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2121                             !(rdev->wiphy.features &
2122                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2123                                 result = -EBUSY;
2124                                 break;
2125                         }
2126
2127                         /* Only allow dynamic channel width changes */
2128                         if (chandef.chan != wdev->preset_chandef.chan) {
2129                                 result = -EBUSY;
2130                                 break;
2131                         }
2132                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2133                         if (result)
2134                                 break;
2135                 }
2136                 wdev->preset_chandef = chandef;
2137                 result = 0;
2138                 break;
2139         case NL80211_IFTYPE_MESH_POINT:
2140                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2141                 break;
2142         case NL80211_IFTYPE_MONITOR:
2143                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2144                 break;
2145         default:
2146                 result = -EINVAL;
2147         }
2148
2149         return result;
2150 }
2151
2152 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2153 {
2154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2155         struct net_device *netdev = info->user_ptr[1];
2156
2157         return __nl80211_set_channel(rdev, netdev, info);
2158 }
2159
2160 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2161 {
2162         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2163         struct net_device *dev = info->user_ptr[1];
2164         struct wireless_dev *wdev = dev->ieee80211_ptr;
2165         const u8 *bssid;
2166
2167         if (!info->attrs[NL80211_ATTR_MAC])
2168                 return -EINVAL;
2169
2170         if (netif_running(dev))
2171                 return -EBUSY;
2172
2173         if (!rdev->ops->set_wds_peer)
2174                 return -EOPNOTSUPP;
2175
2176         if (wdev->iftype != NL80211_IFTYPE_WDS)
2177                 return -EOPNOTSUPP;
2178
2179         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2180         return rdev_set_wds_peer(rdev, dev, bssid);
2181 }
2182
2183 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2184 {
2185         struct cfg80211_registered_device *rdev;
2186         struct net_device *netdev = NULL;
2187         struct wireless_dev *wdev;
2188         int result = 0, rem_txq_params = 0;
2189         struct nlattr *nl_txq_params;
2190         u32 changed;
2191         u8 retry_short = 0, retry_long = 0;
2192         u32 frag_threshold = 0, rts_threshold = 0;
2193         u8 coverage_class = 0;
2194
2195         ASSERT_RTNL();
2196
2197         /*
2198          * Try to find the wiphy and netdev. Normally this
2199          * function shouldn't need the netdev, but this is
2200          * done for backward compatibility -- previously
2201          * setting the channel was done per wiphy, but now
2202          * it is per netdev. Previous userland like hostapd
2203          * also passed a netdev to set_wiphy, so that it is
2204          * possible to let that go to the right netdev!
2205          */
2206
2207         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2208                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2209
2210                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2211                 if (netdev && netdev->ieee80211_ptr)
2212                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2213                 else
2214                         netdev = NULL;
2215         }
2216
2217         if (!netdev) {
2218                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2219                                                   info->attrs);
2220                 if (IS_ERR(rdev))
2221                         return PTR_ERR(rdev);
2222                 wdev = NULL;
2223                 netdev = NULL;
2224                 result = 0;
2225         } else
2226                 wdev = netdev->ieee80211_ptr;
2227
2228         /*
2229          * end workaround code, by now the rdev is available
2230          * and locked, and wdev may or may not be NULL.
2231          */
2232
2233         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2234                 result = cfg80211_dev_rename(
2235                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2236
2237         if (result)
2238                 return result;
2239
2240         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2241                 struct ieee80211_txq_params txq_params;
2242                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2243
2244                 if (!rdev->ops->set_txq_params)
2245                         return -EOPNOTSUPP;
2246
2247                 if (!netdev)
2248                         return -EINVAL;
2249
2250                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2251                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2252                         return -EINVAL;
2253
2254                 if (!netif_running(netdev))
2255                         return -ENETDOWN;
2256
2257                 nla_for_each_nested(nl_txq_params,
2258                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2259                                     rem_txq_params) {
2260                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2261                                            nla_data(nl_txq_params),
2262                                            nla_len(nl_txq_params),
2263                                            txq_params_policy);
2264                         if (result)
2265                                 return result;
2266                         result = parse_txq_params(tb, &txq_params);
2267                         if (result)
2268                                 return result;
2269
2270                         result = rdev_set_txq_params(rdev, netdev,
2271                                                      &txq_params);
2272                         if (result)
2273                                 return result;
2274                 }
2275         }
2276
2277         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2278                 result = __nl80211_set_channel(
2279                         rdev,
2280                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2281                         info);
2282                 if (result)
2283                         return result;
2284         }
2285
2286         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2287                 struct wireless_dev *txp_wdev = wdev;
2288                 enum nl80211_tx_power_setting type;
2289                 int idx, mbm = 0;
2290
2291                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2292                         txp_wdev = NULL;
2293
2294                 if (!rdev->ops->set_tx_power)
2295                         return -EOPNOTSUPP;
2296
2297                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2298                 type = nla_get_u32(info->attrs[idx]);
2299
2300                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2301                     (type != NL80211_TX_POWER_AUTOMATIC))
2302                         return -EINVAL;
2303
2304                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2305                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2306                         mbm = nla_get_u32(info->attrs[idx]);
2307                 }
2308
2309                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2310                 if (result)
2311                         return result;
2312         }
2313
2314         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2315             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2316                 u32 tx_ant, rx_ant;
2317
2318                 if ((!rdev->wiphy.available_antennas_tx &&
2319                      !rdev->wiphy.available_antennas_rx) ||
2320                     !rdev->ops->set_antenna)
2321                         return -EOPNOTSUPP;
2322
2323                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2324                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2325
2326                 /* reject antenna configurations which don't match the
2327                  * available antenna masks, except for the "all" mask */
2328                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2329                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2330                         return -EINVAL;
2331
2332                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2333                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2334
2335                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2336                 if (result)
2337                         return result;
2338         }
2339
2340         changed = 0;
2341
2342         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2343                 retry_short = nla_get_u8(
2344                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2345                 if (retry_short == 0)
2346                         return -EINVAL;
2347
2348                 changed |= WIPHY_PARAM_RETRY_SHORT;
2349         }
2350
2351         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2352                 retry_long = nla_get_u8(
2353                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2354                 if (retry_long == 0)
2355                         return -EINVAL;
2356
2357                 changed |= WIPHY_PARAM_RETRY_LONG;
2358         }
2359
2360         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2361                 frag_threshold = nla_get_u32(
2362                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2363                 if (frag_threshold < 256)
2364                         return -EINVAL;
2365
2366                 if (frag_threshold != (u32) -1) {
2367                         /*
2368                          * Fragments (apart from the last one) are required to
2369                          * have even length. Make the fragmentation code
2370                          * simpler by stripping LSB should someone try to use
2371                          * odd threshold value.
2372                          */
2373                         frag_threshold &= ~0x1;
2374                 }
2375                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2376         }
2377
2378         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2379                 rts_threshold = nla_get_u32(
2380                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2381                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2382         }
2383
2384         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2385                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2386                         return -EINVAL;
2387
2388                 coverage_class = nla_get_u8(
2389                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2390                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2391         }
2392
2393         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2394                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2395                         return -EOPNOTSUPP;
2396
2397                 changed |= WIPHY_PARAM_DYN_ACK;
2398         }
2399
2400         if (changed) {
2401                 u8 old_retry_short, old_retry_long;
2402                 u32 old_frag_threshold, old_rts_threshold;
2403                 u8 old_coverage_class;
2404
2405                 if (!rdev->ops->set_wiphy_params)
2406                         return -EOPNOTSUPP;
2407
2408                 old_retry_short = rdev->wiphy.retry_short;
2409                 old_retry_long = rdev->wiphy.retry_long;
2410                 old_frag_threshold = rdev->wiphy.frag_threshold;
2411                 old_rts_threshold = rdev->wiphy.rts_threshold;
2412                 old_coverage_class = rdev->wiphy.coverage_class;
2413
2414                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2415                         rdev->wiphy.retry_short = retry_short;
2416                 if (changed & WIPHY_PARAM_RETRY_LONG)
2417                         rdev->wiphy.retry_long = retry_long;
2418                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2419                         rdev->wiphy.frag_threshold = frag_threshold;
2420                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2421                         rdev->wiphy.rts_threshold = rts_threshold;
2422                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2423                         rdev->wiphy.coverage_class = coverage_class;
2424
2425                 result = rdev_set_wiphy_params(rdev, changed);
2426                 if (result) {
2427                         rdev->wiphy.retry_short = old_retry_short;
2428                         rdev->wiphy.retry_long = old_retry_long;
2429                         rdev->wiphy.frag_threshold = old_frag_threshold;
2430                         rdev->wiphy.rts_threshold = old_rts_threshold;
2431                         rdev->wiphy.coverage_class = old_coverage_class;
2432                         return result;
2433                 }
2434         }
2435         return 0;
2436 }
2437
2438 static inline u64 wdev_id(struct wireless_dev *wdev)
2439 {
2440         return (u64)wdev->identifier |
2441                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2442 }
2443
2444 static int nl80211_send_chandef(struct sk_buff *msg,
2445                                 const struct cfg80211_chan_def *chandef)
2446 {
2447         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2448                 return -EINVAL;
2449
2450         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2451                         chandef->chan->center_freq))
2452                 return -ENOBUFS;
2453         switch (chandef->width) {
2454         case NL80211_CHAN_WIDTH_20_NOHT:
2455         case NL80211_CHAN_WIDTH_20:
2456         case NL80211_CHAN_WIDTH_40:
2457                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2458                                 cfg80211_get_chandef_type(chandef)))
2459                         return -ENOBUFS;
2460                 break;
2461         default:
2462                 break;
2463         }
2464         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2465                 return -ENOBUFS;
2466         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2467                 return -ENOBUFS;
2468         if (chandef->center_freq2 &&
2469             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2470                 return -ENOBUFS;
2471         return 0;
2472 }
2473
2474 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2475                               struct cfg80211_registered_device *rdev,
2476                               struct wireless_dev *wdev, bool removal)
2477 {
2478         struct net_device *dev = wdev->netdev;
2479         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2480         void *hdr;
2481
2482         if (removal)
2483                 cmd = NL80211_CMD_DEL_INTERFACE;
2484
2485         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2486         if (!hdr)
2487                 return -1;
2488
2489         if (dev &&
2490             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2491              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2492                 goto nla_put_failure;
2493
2494         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2495             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2496             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2497                               NL80211_ATTR_PAD) ||
2498             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2499             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2500                         rdev->devlist_generation ^
2501                         (cfg80211_rdev_list_generation << 2)))
2502                 goto nla_put_failure;
2503
2504         if (rdev->ops->get_channel) {
2505                 int ret;
2506                 struct cfg80211_chan_def chandef;
2507
2508                 ret = rdev_get_channel(rdev, wdev, &chandef);
2509                 if (ret == 0) {
2510                         if (nl80211_send_chandef(msg, &chandef))
2511                                 goto nla_put_failure;
2512                 }
2513         }
2514
2515         if (rdev->ops->get_tx_power) {
2516                 int dbm, ret;
2517
2518                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2519                 if (ret == 0 &&
2520                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2521                                 DBM_TO_MBM(dbm)))
2522                         goto nla_put_failure;
2523         }
2524
2525         if (wdev->ssid_len) {
2526                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2527                         goto nla_put_failure;
2528         }
2529
2530         genlmsg_end(msg, hdr);
2531         return 0;
2532
2533  nla_put_failure:
2534         genlmsg_cancel(msg, hdr);
2535         return -EMSGSIZE;
2536 }
2537
2538 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2539 {
2540         int wp_idx = 0;
2541         int if_idx = 0;
2542         int wp_start = cb->args[0];
2543         int if_start = cb->args[1];
2544         int filter_wiphy = -1;
2545         struct cfg80211_registered_device *rdev;
2546         struct wireless_dev *wdev;
2547
2548         rtnl_lock();
2549         if (!cb->args[2]) {
2550                 struct nl80211_dump_wiphy_state state = {
2551                         .filter_wiphy = -1,
2552                 };
2553                 int ret;
2554
2555                 ret = nl80211_dump_wiphy_parse(skb, cb, &state);
2556                 if (ret)
2557                         return ret;
2558
2559                 filter_wiphy = state.filter_wiphy;
2560
2561                 /*
2562                  * if filtering, set cb->args[2] to +1 since 0 is the default
2563                  * value needed to determine that parsing is necessary.
2564                  */
2565                 if (filter_wiphy >= 0)
2566                         cb->args[2] = filter_wiphy + 1;
2567                 else
2568                         cb->args[2] = -1;
2569         } else if (cb->args[2] > 0) {
2570                 filter_wiphy = cb->args[2] - 1;
2571         }
2572
2573         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2574                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2575                         continue;
2576                 if (wp_idx < wp_start) {
2577                         wp_idx++;
2578                         continue;
2579                 }
2580
2581                 if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
2582                         continue;
2583
2584                 if_idx = 0;
2585
2586                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2587                         if (if_idx < if_start) {
2588                                 if_idx++;
2589                                 continue;
2590                         }
2591                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2592                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2593                                                rdev, wdev, false) < 0) {
2594                                 goto out;
2595                         }
2596                         if_idx++;
2597                 }
2598
2599                 wp_idx++;
2600         }
2601  out:
2602         rtnl_unlock();
2603
2604         cb->args[0] = wp_idx;
2605         cb->args[1] = if_idx;
2606
2607         return skb->len;
2608 }
2609
2610 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2611 {
2612         struct sk_buff *msg;
2613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2614         struct wireless_dev *wdev = info->user_ptr[1];
2615
2616         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2617         if (!msg)
2618                 return -ENOMEM;
2619
2620         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2621                                rdev, wdev, false) < 0) {
2622                 nlmsg_free(msg);
2623                 return -ENOBUFS;
2624         }
2625
2626         return genlmsg_reply(msg, info);
2627 }
2628
2629 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2630         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2631         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2632         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2633         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2634         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2635         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2636 };
2637
2638 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2639 {
2640         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2641         int flag;
2642
2643         *mntrflags = 0;
2644
2645         if (!nla)
2646                 return -EINVAL;
2647
2648         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2649                              nla, mntr_flags_policy))
2650                 return -EINVAL;
2651
2652         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2653                 if (flags[flag])
2654                         *mntrflags |= (1<<flag);
2655
2656         return 0;
2657 }
2658
2659 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2660                                struct net_device *netdev, u8 use_4addr,
2661                                enum nl80211_iftype iftype)
2662 {
2663         if (!use_4addr) {
2664                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2665                         return -EBUSY;
2666                 return 0;
2667         }
2668
2669         switch (iftype) {
2670         case NL80211_IFTYPE_AP_VLAN:
2671                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2672                         return 0;
2673                 break;
2674         case NL80211_IFTYPE_STATION:
2675                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2676                         return 0;
2677                 break;
2678         default:
2679                 break;
2680         }
2681
2682         return -EOPNOTSUPP;
2683 }
2684
2685 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2686 {
2687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2688         struct vif_params params;
2689         int err;
2690         enum nl80211_iftype otype, ntype;
2691         struct net_device *dev = info->user_ptr[1];
2692         u32 _flags, *flags = NULL;
2693         bool change = false;
2694
2695         memset(&params, 0, sizeof(params));
2696
2697         otype = ntype = dev->ieee80211_ptr->iftype;
2698
2699         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2700                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2701                 if (otype != ntype)
2702                         change = true;
2703                 if (ntype > NL80211_IFTYPE_MAX)
2704                         return -EINVAL;
2705         }
2706
2707         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2708                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2709
2710                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2711                         return -EINVAL;
2712                 if (netif_running(dev))
2713                         return -EBUSY;
2714
2715                 wdev_lock(wdev);
2716                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2717                              IEEE80211_MAX_MESH_ID_LEN);
2718                 wdev->mesh_id_up_len =
2719                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2720                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2721                        wdev->mesh_id_up_len);
2722                 wdev_unlock(wdev);
2723         }
2724
2725         if (info->attrs[NL80211_ATTR_4ADDR]) {
2726                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2727                 change = true;
2728                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2729                 if (err)
2730                         return err;
2731         } else {
2732                 params.use_4addr = -1;
2733         }
2734
2735         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2736                 if (ntype != NL80211_IFTYPE_MONITOR)
2737                         return -EINVAL;
2738                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2739                                           &_flags);
2740                 if (err)
2741                         return err;
2742
2743                 flags = &_flags;
2744                 change = true;
2745         }
2746
2747         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2748                 const u8 *mumimo_groups;
2749                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2750
2751                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2752                         return -EOPNOTSUPP;
2753
2754                 mumimo_groups =
2755                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2756
2757                 /* bits 0 and 63 are reserved and must be zero */
2758                 if ((mumimo_groups[0] & BIT(7)) ||
2759                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0)))
2760                         return -EINVAL;
2761
2762                 memcpy(params.vht_mumimo_groups, mumimo_groups,
2763                        VHT_MUMIMO_GROUPS_DATA_LEN);
2764                 change = true;
2765         }
2766
2767         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2768                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2769
2770                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2771                         return -EOPNOTSUPP;
2772
2773                 nla_memcpy(params.macaddr,
2774                            info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR],
2775                            ETH_ALEN);
2776                 change = true;
2777         }
2778
2779         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2780             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2781                 return -EOPNOTSUPP;
2782
2783         if (change)
2784                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2785         else
2786                 err = 0;
2787
2788         if (!err && params.use_4addr != -1)
2789                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2790
2791         return err;
2792 }
2793
2794 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2795 {
2796         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2797         struct vif_params params;
2798         struct wireless_dev *wdev;
2799         struct sk_buff *msg;
2800         int err;
2801         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2802         u32 flags;
2803
2804         /* to avoid failing a new interface creation due to pending removal */
2805         cfg80211_destroy_ifaces(rdev);
2806
2807         memset(&params, 0, sizeof(params));
2808
2809         if (!info->attrs[NL80211_ATTR_IFNAME])
2810                 return -EINVAL;
2811
2812         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2813                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2814                 if (type > NL80211_IFTYPE_MAX)
2815                         return -EINVAL;
2816         }
2817
2818         if (!rdev->ops->add_virtual_intf ||
2819             !(rdev->wiphy.interface_modes & (1 << type)))
2820                 return -EOPNOTSUPP;
2821
2822         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2823              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2824             info->attrs[NL80211_ATTR_MAC]) {
2825                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2826                            ETH_ALEN);
2827                 if (!is_valid_ether_addr(params.macaddr))
2828                         return -EADDRNOTAVAIL;
2829         }
2830
2831         if (info->attrs[NL80211_ATTR_4ADDR]) {
2832                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2833                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2834                 if (err)
2835                         return err;
2836         }
2837
2838         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2839                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2840                                   &flags);
2841
2842         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2843             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2844                 return -EOPNOTSUPP;
2845
2846         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2847         if (!msg)
2848                 return -ENOMEM;
2849
2850         wdev = rdev_add_virtual_intf(rdev,
2851                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2852                                 NET_NAME_USER, type, err ? NULL : &flags,
2853                                 &params);
2854         if (WARN_ON(!wdev)) {
2855                 nlmsg_free(msg);
2856                 return -EPROTO;
2857         } else if (IS_ERR(wdev)) {
2858                 nlmsg_free(msg);
2859                 return PTR_ERR(wdev);
2860         }
2861
2862         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2863                 wdev->owner_nlportid = info->snd_portid;
2864
2865         switch (type) {
2866         case NL80211_IFTYPE_MESH_POINT:
2867                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2868                         break;
2869                 wdev_lock(wdev);
2870                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2871                              IEEE80211_MAX_MESH_ID_LEN);
2872                 wdev->mesh_id_up_len =
2873                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2874                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2875                        wdev->mesh_id_up_len);
2876                 wdev_unlock(wdev);
2877                 break;
2878         case NL80211_IFTYPE_P2P_DEVICE:
2879                 /*
2880                  * P2P Device doesn't have a netdev, so doesn't go
2881                  * through the netdev notifier and must be added here
2882                  */
2883                 mutex_init(&wdev->mtx);
2884                 INIT_LIST_HEAD(&wdev->event_list);
2885                 spin_lock_init(&wdev->event_lock);
2886                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2887                 spin_lock_init(&wdev->mgmt_registrations_lock);
2888
2889                 wdev->identifier = ++rdev->wdev_id;
2890                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2891                 rdev->devlist_generation++;
2892                 break;
2893         default:
2894                 break;
2895         }
2896
2897         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2898                                rdev, wdev, false) < 0) {
2899                 nlmsg_free(msg);
2900                 return -ENOBUFS;
2901         }
2902
2903         /*
2904          * For wdevs which have no associated netdev object (e.g. of type
2905          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
2906          * For all other types, the event will be generated from the
2907          * netdev notifier
2908          */
2909         if (!wdev->netdev)
2910                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
2911
2912         return genlmsg_reply(msg, info);
2913 }
2914
2915 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2916 {
2917         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2918         struct wireless_dev *wdev = info->user_ptr[1];
2919
2920         if (!rdev->ops->del_virtual_intf)
2921                 return -EOPNOTSUPP;
2922
2923         /*
2924          * If we remove a wireless device without a netdev then clear
2925          * user_ptr[1] so that nl80211_post_doit won't dereference it
2926          * to check if it needs to do dev_put(). Otherwise it crashes
2927          * since the wdev has been freed, unlike with a netdev where
2928          * we need the dev_put() for the netdev to really be freed.
2929          */
2930         if (!wdev->netdev)
2931                 info->user_ptr[1] = NULL;
2932
2933         return rdev_del_virtual_intf(rdev, wdev);
2934 }
2935
2936 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2937 {
2938         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2939         struct net_device *dev = info->user_ptr[1];
2940         u16 noack_map;
2941
2942         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2943                 return -EINVAL;
2944
2945         if (!rdev->ops->set_noack_map)
2946                 return -EOPNOTSUPP;
2947
2948         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2949
2950         return rdev_set_noack_map(rdev, dev, noack_map);
2951 }
2952
2953 struct get_key_cookie {
2954         struct sk_buff *msg;
2955         int error;
2956         int idx;
2957 };
2958
2959 static void get_key_callback(void *c, struct key_params *params)
2960 {
2961         struct nlattr *key;
2962         struct get_key_cookie *cookie = c;
2963
2964         if ((params->key &&
2965              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2966                      params->key_len, params->key)) ||
2967             (params->seq &&
2968              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2969                      params->seq_len, params->seq)) ||
2970             (params->cipher &&
2971              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2972                          params->cipher)))
2973                 goto nla_put_failure;
2974
2975         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2976         if (!key)
2977                 goto nla_put_failure;
2978
2979         if ((params->key &&
2980              nla_put(cookie->msg, NL80211_KEY_DATA,
2981                      params->key_len, params->key)) ||
2982             (params->seq &&
2983              nla_put(cookie->msg, NL80211_KEY_SEQ,
2984                      params->seq_len, params->seq)) ||
2985             (params->cipher &&
2986              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2987                          params->cipher)))
2988                 goto nla_put_failure;
2989
2990         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2991                 goto nla_put_failure;
2992
2993         nla_nest_end(cookie->msg, key);
2994
2995         return;
2996  nla_put_failure:
2997         cookie->error = 1;
2998 }
2999
3000 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
3001 {
3002         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3003         int err;
3004         struct net_device *dev = info->user_ptr[1];
3005         u8 key_idx = 0;
3006         const u8 *mac_addr = NULL;
3007         bool pairwise;
3008         struct get_key_cookie cookie = {
3009                 .error = 0,
3010         };
3011         void *hdr;
3012         struct sk_buff *msg;
3013
3014         if (info->attrs[NL80211_ATTR_KEY_IDX])
3015                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
3016
3017         if (key_idx > 5)
3018                 return -EINVAL;
3019
3020         if (info->attrs[NL80211_ATTR_MAC])
3021                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3022
3023         pairwise = !!mac_addr;
3024         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3025                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3026
3027                 if (kt >= NUM_NL80211_KEYTYPES)
3028                         return -EINVAL;
3029                 if (kt != NL80211_KEYTYPE_GROUP &&
3030                     kt != NL80211_KEYTYPE_PAIRWISE)
3031                         return -EINVAL;
3032                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3033         }
3034
3035         if (!rdev->ops->get_key)
3036                 return -EOPNOTSUPP;
3037
3038         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3039                 return -ENOENT;
3040
3041         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3042         if (!msg)
3043                 return -ENOMEM;
3044
3045         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3046                              NL80211_CMD_NEW_KEY);
3047         if (!hdr)
3048                 goto nla_put_failure;
3049
3050         cookie.msg = msg;
3051         cookie.idx = key_idx;
3052
3053         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3054             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3055                 goto nla_put_failure;
3056         if (mac_addr &&
3057             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3058                 goto nla_put_failure;
3059
3060         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3061                            get_key_callback);
3062
3063         if (err)
3064                 goto free_msg;
3065
3066         if (cookie.error)
3067                 goto nla_put_failure;
3068
3069         genlmsg_end(msg, hdr);
3070         return genlmsg_reply(msg, info);
3071
3072  nla_put_failure:
3073         err = -ENOBUFS;
3074  free_msg:
3075         nlmsg_free(msg);
3076         return err;
3077 }
3078
3079 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3080 {
3081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3082         struct key_parse key;
3083         int err;
3084         struct net_device *dev = info->user_ptr[1];
3085
3086         err = nl80211_parse_key(info, &key);
3087         if (err)
3088                 return err;
3089
3090         if (key.idx < 0)
3091                 return -EINVAL;
3092
3093         /* only support setting default key */
3094         if (!key.def && !key.defmgmt)
3095                 return -EINVAL;
3096
3097         wdev_lock(dev->ieee80211_ptr);
3098
3099         if (key.def) {
3100                 if (!rdev->ops->set_default_key) {
3101                         err = -EOPNOTSUPP;
3102                         goto out;
3103                 }
3104
3105                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3106                 if (err)
3107                         goto out;
3108
3109                 err = rdev_set_default_key(rdev, dev, key.idx,
3110                                                  key.def_uni, key.def_multi);
3111
3112                 if (err)
3113                         goto out;
3114
3115 #ifdef CONFIG_CFG80211_WEXT
3116                 dev->ieee80211_ptr->wext.default_key = key.idx;
3117 #endif
3118         } else {
3119                 if (key.def_uni || !key.def_multi) {
3120                         err = -EINVAL;
3121                         goto out;
3122                 }
3123
3124                 if (!rdev->ops->set_default_mgmt_key) {
3125                         err = -EOPNOTSUPP;
3126                         goto out;
3127                 }
3128
3129                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3130                 if (err)
3131                         goto out;
3132
3133                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3134                 if (err)
3135                         goto out;
3136
3137 #ifdef CONFIG_CFG80211_WEXT
3138                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3139 #endif
3140         }
3141
3142  out:
3143         wdev_unlock(dev->ieee80211_ptr);
3144
3145         return err;
3146 }
3147
3148 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3149 {
3150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3151         int err;
3152         struct net_device *dev = info->user_ptr[1];
3153         struct key_parse key;
3154         const u8 *mac_addr = NULL;
3155
3156         err = nl80211_parse_key(info, &key);
3157         if (err)
3158                 return err;
3159
3160         if (!key.p.key)
3161                 return -EINVAL;
3162
3163         if (info->attrs[NL80211_ATTR_MAC])
3164                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3165
3166         if (key.type == -1) {
3167                 if (mac_addr)
3168                         key.type = NL80211_KEYTYPE_PAIRWISE;
3169                 else
3170                         key.type = NL80211_KEYTYPE_GROUP;
3171         }
3172
3173         /* for now */
3174         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3175             key.type != NL80211_KEYTYPE_GROUP)
3176                 return -EINVAL;
3177
3178         if (!rdev->ops->add_key)
3179                 return -EOPNOTSUPP;
3180
3181         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3182                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3183                                            mac_addr))
3184                 return -EINVAL;
3185
3186         wdev_lock(dev->ieee80211_ptr);
3187         err = nl80211_key_allowed(dev->ieee80211_ptr);
3188         if (!err)
3189                 err = rdev_add_key(rdev, dev, key.idx,
3190                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3191                                     mac_addr, &key.p);
3192         wdev_unlock(dev->ieee80211_ptr);
3193
3194         return err;
3195 }
3196
3197 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3198 {
3199         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3200         int err;
3201         struct net_device *dev = info->user_ptr[1];
3202         u8 *mac_addr = NULL;
3203         struct key_parse key;
3204
3205         err = nl80211_parse_key(info, &key);
3206         if (err)
3207                 return err;
3208
3209         if (info->attrs[NL80211_ATTR_MAC])
3210                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3211
3212         if (key.type == -1) {
3213                 if (mac_addr)
3214                         key.type = NL80211_KEYTYPE_PAIRWISE;
3215                 else
3216                         key.type = NL80211_KEYTYPE_GROUP;
3217         }
3218
3219         /* for now */
3220         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3221             key.type != NL80211_KEYTYPE_GROUP)
3222                 return -EINVAL;
3223
3224         if (!rdev->ops->del_key)
3225                 return -EOPNOTSUPP;
3226
3227         wdev_lock(dev->ieee80211_ptr);
3228         err = nl80211_key_allowed(dev->ieee80211_ptr);
3229
3230         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3231             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3232                 err = -ENOENT;
3233
3234         if (!err)
3235                 err = rdev_del_key(rdev, dev, key.idx,
3236                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3237                                    mac_addr);
3238
3239 #ifdef CONFIG_CFG80211_WEXT
3240         if (!err) {
3241                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3242                         dev->ieee80211_ptr->wext.default_key = -1;
3243                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3244                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3245         }
3246 #endif
3247         wdev_unlock(dev->ieee80211_ptr);
3248
3249         return err;
3250 }
3251
3252 /* This function returns an error or the number of nested attributes */
3253 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3254 {
3255         struct nlattr *attr;
3256         int n_entries = 0, tmp;
3257
3258         nla_for_each_nested(attr, nl_attr, tmp) {
3259                 if (nla_len(attr) != ETH_ALEN)
3260                         return -EINVAL;
3261
3262                 n_entries++;
3263         }
3264
3265         return n_entries;
3266 }
3267
3268 /*
3269  * This function parses ACL information and allocates memory for ACL data.
3270  * On successful return, the calling function is responsible to free the
3271  * ACL buffer returned by this function.
3272  */
3273 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3274                                                 struct genl_info *info)
3275 {
3276         enum nl80211_acl_policy acl_policy;
3277         struct nlattr *attr;
3278         struct cfg80211_acl_data *acl;
3279         int i = 0, n_entries, tmp;
3280
3281         if (!wiphy->max_acl_mac_addrs)
3282                 return ERR_PTR(-EOPNOTSUPP);
3283
3284         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3285                 return ERR_PTR(-EINVAL);
3286
3287         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3288         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3289             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3290                 return ERR_PTR(-EINVAL);
3291
3292         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3293                 return ERR_PTR(-EINVAL);
3294
3295         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3296         if (n_entries < 0)
3297                 return ERR_PTR(n_entries);
3298
3299         if (n_entries > wiphy->max_acl_mac_addrs)
3300                 return ERR_PTR(-ENOTSUPP);
3301
3302         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3303                       GFP_KERNEL);
3304         if (!acl)
3305                 return ERR_PTR(-ENOMEM);
3306
3307         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3308                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3309                 i++;
3310         }
3311
3312         acl->n_acl_entries = n_entries;
3313         acl->acl_policy = acl_policy;
3314
3315         return acl;
3316 }
3317
3318 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3319 {
3320         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3321         struct net_device *dev = info->user_ptr[1];
3322         struct cfg80211_acl_data *acl;
3323         int err;
3324
3325         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3326             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3327                 return -EOPNOTSUPP;
3328
3329         if (!dev->ieee80211_ptr->beacon_interval)
3330                 return -EINVAL;
3331
3332         acl = parse_acl_data(&rdev->wiphy, info);
3333         if (IS_ERR(acl))
3334                 return PTR_ERR(acl);
3335
3336         err = rdev_set_mac_acl(rdev, dev, acl);
3337
3338         kfree(acl);
3339
3340         return err;
3341 }
3342
3343 static int nl80211_parse_beacon(struct nlattr *attrs[],
3344                                 struct cfg80211_beacon_data *bcn)
3345 {
3346         bool haveinfo = false;
3347
3348         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3349             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3350             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3351             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3352                 return -EINVAL;
3353
3354         memset(bcn, 0, sizeof(*bcn));
3355
3356         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3357                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3358                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3359                 if (!bcn->head_len)
3360                         return -EINVAL;
3361                 haveinfo = true;
3362         }
3363
3364         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3365                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3366                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3367                 haveinfo = true;
3368         }
3369
3370         if (!haveinfo)
3371                 return -EINVAL;
3372
3373         if (attrs[NL80211_ATTR_IE]) {
3374                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3375                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3376         }
3377
3378         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3379                 bcn->proberesp_ies =
3380                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3381                 bcn->proberesp_ies_len =
3382                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3383         }
3384
3385         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3386                 bcn->assocresp_ies =
3387                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3388                 bcn->assocresp_ies_len =
3389                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3390         }
3391
3392         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3393                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3394                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3395         }
3396
3397         return 0;
3398 }
3399
3400 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3401                                    struct cfg80211_ap_settings *params)
3402 {
3403         struct wireless_dev *wdev;
3404         bool ret = false;
3405
3406         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3407                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3408                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3409                         continue;
3410
3411                 if (!wdev->preset_chandef.chan)
3412                         continue;
3413
3414                 params->chandef = wdev->preset_chandef;
3415                 ret = true;
3416                 break;
3417         }
3418
3419         return ret;
3420 }
3421
3422 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3423                                     enum nl80211_auth_type auth_type,
3424                                     enum nl80211_commands cmd)
3425 {
3426         if (auth_type > NL80211_AUTHTYPE_MAX)
3427                 return false;
3428
3429         switch (cmd) {
3430         case NL80211_CMD_AUTHENTICATE:
3431                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3432                     auth_type == NL80211_AUTHTYPE_SAE)
3433                         return false;
3434                 return true;
3435         case NL80211_CMD_CONNECT:
3436         case NL80211_CMD_START_AP:
3437                 /* SAE not supported yet */
3438                 if (auth_type == NL80211_AUTHTYPE_SAE)
3439                         return false;
3440                 return true;
3441         default:
3442                 return false;
3443         }
3444 }
3445
3446 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3447 {
3448         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3449         struct net_device *dev = info->user_ptr[1];
3450         struct wireless_dev *wdev = dev->ieee80211_ptr;
3451         struct cfg80211_ap_settings params;
3452         int err;
3453
3454         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3455             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3456                 return -EOPNOTSUPP;
3457
3458         if (!rdev->ops->start_ap)
3459                 return -EOPNOTSUPP;
3460
3461         if (wdev->beacon_interval)
3462                 return -EALREADY;
3463
3464         memset(&params, 0, sizeof(params));
3465
3466         /* these are required for START_AP */
3467         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3468             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3469             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3470                 return -EINVAL;
3471
3472         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3473         if (err)
3474                 return err;
3475
3476         params.beacon_interval =
3477                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3478         params.dtim_period =
3479                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3480
3481         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3482         if (err)
3483                 return err;
3484
3485         /*
3486          * In theory, some of these attributes should be required here
3487          * but since they were not used when the command was originally
3488          * added, keep them optional for old user space programs to let
3489          * them continue to work with drivers that do not need the
3490          * additional information -- drivers must check!
3491          */
3492         if (info->attrs[NL80211_ATTR_SSID]) {
3493                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3494                 params.ssid_len =
3495                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3496                 if (params.ssid_len == 0 ||
3497                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3498                         return -EINVAL;
3499         }
3500
3501         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3502                 params.hidden_ssid = nla_get_u32(
3503                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3504                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3505                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3506                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3507                         return -EINVAL;
3508         }
3509
3510         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3511
3512         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3513                 params.auth_type = nla_get_u32(
3514                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3515                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3516                                              NL80211_CMD_START_AP))
3517                         return -EINVAL;
3518         } else
3519                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3520
3521         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3522                                       NL80211_MAX_NR_CIPHER_SUITES);
3523         if (err)
3524                 return err;
3525
3526         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3527                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3528                         return -EOPNOTSUPP;
3529                 params.inactivity_timeout = nla_get_u16(
3530                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3531         }
3532
3533         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3534                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3535                         return -EINVAL;
3536                 params.p2p_ctwindow =
3537                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3538                 if (params.p2p_ctwindow > 127)
3539                         return -EINVAL;
3540                 if (params.p2p_ctwindow != 0 &&
3541                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3542                         return -EINVAL;
3543         }
3544
3545         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3546                 u8 tmp;
3547
3548                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3549                         return -EINVAL;
3550                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3551                 if (tmp > 1)
3552                         return -EINVAL;
3553                 params.p2p_opp_ps = tmp;
3554                 if (params.p2p_opp_ps != 0 &&
3555                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3556                         return -EINVAL;
3557         }
3558
3559         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3560                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3561                 if (err)
3562                         return err;
3563         } else if (wdev->preset_chandef.chan) {
3564                 params.chandef = wdev->preset_chandef;
3565         } else if (!nl80211_get_ap_channel(rdev, &params))
3566                 return -EINVAL;
3567
3568         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3569                                            wdev->iftype))
3570                 return -EINVAL;
3571
3572         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3573                 params.smps_mode =
3574                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3575                 switch (params.smps_mode) {
3576                 case NL80211_SMPS_OFF:
3577                         break;
3578                 case NL80211_SMPS_STATIC:
3579                         if (!(rdev->wiphy.features &
3580                               NL80211_FEATURE_STATIC_SMPS))
3581                                 return -EINVAL;
3582                         break;
3583                 case NL80211_SMPS_DYNAMIC:
3584                         if (!(rdev->wiphy.features &
3585                               NL80211_FEATURE_DYNAMIC_SMPS))
3586                                 return -EINVAL;
3587                         break;
3588                 default:
3589                         return -EINVAL;
3590                 }
3591         } else {
3592                 params.smps_mode = NL80211_SMPS_OFF;
3593         }
3594
3595         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
3596         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
3597                 return -EOPNOTSUPP;
3598
3599         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3600                 params.acl = parse_acl_data(&rdev->wiphy, info);
3601                 if (IS_ERR(params.acl))
3602                         return PTR_ERR(params.acl);
3603         }
3604
3605         wdev_lock(wdev);
3606         err = rdev_start_ap(rdev, dev, &params);
3607         if (!err) {
3608                 wdev->preset_chandef = params.chandef;
3609                 wdev->beacon_interval = params.beacon_interval;
3610                 wdev->chandef = params.chandef;
3611                 wdev->ssid_len = params.ssid_len;
3612                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3613         }
3614         wdev_unlock(wdev);
3615
3616         kfree(params.acl);
3617
3618         return err;
3619 }
3620
3621 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3622 {
3623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3624         struct net_device *dev = info->user_ptr[1];
3625         struct wireless_dev *wdev = dev->ieee80211_ptr;
3626         struct cfg80211_beacon_data params;
3627         int err;
3628
3629         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3630             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3631                 return -EOPNOTSUPP;
3632
3633         if (!rdev->ops->change_beacon)
3634                 return -EOPNOTSUPP;
3635
3636         if (!wdev->beacon_interval)
3637                 return -EINVAL;
3638
3639         err = nl80211_parse_beacon(info->attrs, &params);
3640         if (err)
3641                 return err;
3642
3643         wdev_lock(wdev);
3644         err = rdev_change_beacon(rdev, dev, &params);
3645         wdev_unlock(wdev);
3646
3647         return err;
3648 }
3649
3650 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3651 {
3652         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3653         struct net_device *dev = info->user_ptr[1];
3654
3655         return cfg80211_stop_ap(rdev, dev, false);
3656 }
3657
3658 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3659         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3660         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3661         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3662         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3663         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3664         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3665 };
3666
3667 static int parse_station_flags(struct genl_info *info,
3668                                enum nl80211_iftype iftype,
3669                                struct station_parameters *params)
3670 {
3671         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3672         struct nlattr *nla;
3673         int flag;
3674
3675         /*
3676          * Try parsing the new attribute first so userspace
3677          * can specify both for older kernels.
3678          */
3679         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3680         if (nla) {
3681                 struct nl80211_sta_flag_update *sta_flags;
3682
3683                 sta_flags = nla_data(nla);
3684                 params->sta_flags_mask = sta_flags->mask;
3685                 params->sta_flags_set = sta_flags->set;
3686                 params->sta_flags_set &= params->sta_flags_mask;
3687                 if ((params->sta_flags_mask |
3688                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3689                         return -EINVAL;
3690                 return 0;
3691         }
3692
3693         /* if present, parse the old attribute */
3694
3695         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3696         if (!nla)
3697                 return 0;
3698
3699         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3700                              nla, sta_flags_policy))
3701                 return -EINVAL;
3702
3703         /*
3704          * Only allow certain flags for interface types so that
3705          * other attributes are silently ignored. Remember that
3706          * this is backward compatibility code with old userspace
3707          * and shouldn't be hit in other cases anyway.
3708          */
3709         switch (iftype) {
3710         case NL80211_IFTYPE_AP:
3711         case NL80211_IFTYPE_AP_VLAN:
3712         case NL80211_IFTYPE_P2P_GO:
3713                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3714                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3715                                          BIT(NL80211_STA_FLAG_WME) |
3716                                          BIT(NL80211_STA_FLAG_MFP);
3717                 break;
3718         case NL80211_IFTYPE_P2P_CLIENT:
3719         case NL80211_IFTYPE_STATION:
3720                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3721                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3722                 break;
3723         case NL80211_IFTYPE_MESH_POINT:
3724                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3725                                          BIT(NL80211_STA_FLAG_MFP) |
3726                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3727         default:
3728                 return -EINVAL;
3729         }
3730
3731         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3732                 if (flags[flag]) {
3733                         params->sta_flags_set |= (1<<flag);
3734
3735                         /* no longer support new API additions in old API */
3736                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3737                                 return -EINVAL;
3738                 }
3739         }
3740
3741         return 0;
3742 }
3743
3744 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3745                                  int attr)
3746 {
3747         struct nlattr *rate;
3748         u32 bitrate;
3749         u16 bitrate_compat;
3750         enum nl80211_attrs rate_flg;
3751
3752         rate = nla_nest_start(msg, attr);
3753         if (!rate)
3754                 return false;
3755
3756         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3757         bitrate = cfg80211_calculate_bitrate(info);
3758         /* report 16-bit bitrate only if we can */
3759         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3760         if (bitrate > 0 &&
3761             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3762                 return false;
3763         if (bitrate_compat > 0 &&
3764             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3765                 return false;
3766
3767         switch (info->bw) {
3768         case RATE_INFO_BW_5:
3769                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3770                 break;
3771         case RATE_INFO_BW_10:
3772                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3773                 break;
3774         default:
3775                 WARN_ON(1);
3776                 /* fall through */
3777         case RATE_INFO_BW_20:
3778                 rate_flg = 0;
3779                 break;
3780         case RATE_INFO_BW_40:
3781                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3782                 break;
3783         case RATE_INFO_BW_80:
3784                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3785                 break;
3786         case RATE_INFO_BW_160:
3787                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3788                 break;
3789         }
3790
3791         if (rate_flg && nla_put_flag(msg, rate_flg))
3792                 return false;
3793
3794         if (info->flags & RATE_INFO_FLAGS_MCS) {
3795                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3796                         return false;
3797                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3798                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3799                         return false;
3800         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3801                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3802                         return false;
3803                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3804                         return false;
3805                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3806                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3807                         return false;
3808         }
3809
3810         nla_nest_end(msg, rate);
3811         return true;
3812 }
3813
3814 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3815                                int id)
3816 {
3817         void *attr;
3818         int i = 0;
3819
3820         if (!mask)
3821                 return true;
3822
3823         attr = nla_nest_start(msg, id);
3824         if (!attr)
3825                 return false;
3826
3827         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3828                 if (!(mask & BIT(i)))
3829                         continue;
3830
3831                 if (nla_put_u8(msg, i, signal[i]))
3832                         return false;
3833         }
3834
3835         nla_nest_end(msg, attr);
3836
3837         return true;
3838 }
3839
3840 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3841                                 u32 seq, int flags,
3842                                 struct cfg80211_registered_device *rdev,
3843                                 struct net_device *dev,
3844                                 const u8 *mac_addr, struct station_info *sinfo)
3845 {
3846         void *hdr;
3847         struct nlattr *sinfoattr, *bss_param;
3848
3849         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3850         if (!hdr)
3851                 return -1;
3852
3853         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3854             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3855             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3856                 goto nla_put_failure;
3857
3858         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3859         if (!sinfoattr)
3860                 goto nla_put_failure;
3861
3862 #define PUT_SINFO(attr, memb, type) do {                                \
3863         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
3864         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3865             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3866                              sinfo->memb))                              \
3867                 goto nla_put_failure;                                   \
3868         } while (0)
3869 #define PUT_SINFO_U64(attr, memb) do {                                  \
3870         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
3871             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
3872                               sinfo->memb, NL80211_STA_INFO_PAD))       \
3873                 goto nla_put_failure;                                   \
3874         } while (0)
3875
3876         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3877         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3878
3879         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3880                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3881             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3882                         (u32)sinfo->rx_bytes))
3883                 goto nla_put_failure;
3884
3885         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3886                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3887             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3888                         (u32)sinfo->tx_bytes))
3889                 goto nla_put_failure;
3890
3891         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
3892         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
3893         PUT_SINFO(LLID, llid, u16);
3894         PUT_SINFO(PLID, plid, u16);
3895         PUT_SINFO(PLINK_STATE, plink_state, u8);
3896         PUT_SINFO_U64(RX_DURATION, rx_duration);
3897
3898         switch (rdev->wiphy.signal_type) {
3899         case CFG80211_SIGNAL_TYPE_MBM:
3900                 PUT_SINFO(SIGNAL, signal, u8);
3901                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3902                 break;
3903         default:
3904                 break;
3905         }
3906         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3907                 if (!nl80211_put_signal(msg, sinfo->chains,
3908                                         sinfo->chain_signal,
3909                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3910                         goto nla_put_failure;
3911         }
3912         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3913                 if (!nl80211_put_signal(msg, sinfo->chains,
3914                                         sinfo->chain_signal_avg,
3915                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3916                         goto nla_put_failure;
3917         }
3918         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3919                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3920                                           NL80211_STA_INFO_TX_BITRATE))
3921                         goto nla_put_failure;
3922         }
3923         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3924                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3925                                           NL80211_STA_INFO_RX_BITRATE))
3926                         goto nla_put_failure;
3927         }
3928
3929         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3930         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3931         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3932         PUT_SINFO(TX_FAILED, tx_failed, u32);
3933         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3934         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3935         PUT_SINFO(LOCAL_PM, local_pm, u32);
3936         PUT_SINFO(PEER_PM, peer_pm, u32);
3937         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3938
3939         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3940                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3941                 if (!bss_param)
3942                         goto nla_put_failure;
3943
3944                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3945                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3946                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3947                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3948                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3949                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3950                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3951                                sinfo->bss_param.dtim_period) ||
3952                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3953                                 sinfo->bss_param.beacon_interval))
3954                         goto nla_put_failure;
3955
3956                 nla_nest_end(msg, bss_param);
3957         }
3958         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3959             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3960                     sizeof(struct nl80211_sta_flag_update),
3961                     &sinfo->sta_flags))
3962                 goto nla_put_failure;
3963
3964         PUT_SINFO_U64(T_OFFSET, t_offset);
3965         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
3966         PUT_SINFO_U64(BEACON_RX, rx_beacon);
3967         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3968
3969 #undef PUT_SINFO
3970 #undef PUT_SINFO_U64
3971
3972         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3973                 struct nlattr *tidsattr;
3974                 int tid;
3975
3976                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3977                 if (!tidsattr)
3978                         goto nla_put_failure;
3979
3980                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3981                         struct cfg80211_tid_stats *tidstats;
3982                         struct nlattr *tidattr;
3983
3984                         tidstats = &sinfo->pertid[tid];
3985
3986                         if (!tidstats->filled)
3987                                 continue;
3988
3989                         tidattr = nla_nest_start(msg, tid + 1);
3990                         if (!tidattr)
3991                                 goto nla_put_failure;
3992
3993 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
3994         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3995             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
3996                               tidstats->memb, NL80211_TID_STATS_PAD))   \
3997                 goto nla_put_failure;                                   \
3998         } while (0)
3999
4000                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
4001                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
4002                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
4003                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
4004
4005 #undef PUT_TIDVAL_U64
4006                         nla_nest_end(msg, tidattr);
4007                 }
4008
4009                 nla_nest_end(msg, tidsattr);
4010         }
4011
4012         nla_nest_end(msg, sinfoattr);
4013
4014         if (sinfo->assoc_req_ies_len &&
4015             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
4016                     sinfo->assoc_req_ies))
4017                 goto nla_put_failure;
4018
4019         genlmsg_end(msg, hdr);
4020         return 0;
4021
4022  nla_put_failure:
4023         genlmsg_cancel(msg, hdr);
4024         return -EMSGSIZE;
4025 }
4026
4027 static int nl80211_dump_station(struct sk_buff *skb,
4028                                 struct netlink_callback *cb)
4029 {
4030         struct station_info sinfo;
4031         struct cfg80211_registered_device *rdev;
4032         struct wireless_dev *wdev;
4033         u8 mac_addr[ETH_ALEN];
4034         int sta_idx = cb->args[2];
4035         int err;
4036
4037         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4038         if (err)
4039                 return err;
4040
4041         if (!wdev->netdev) {
4042                 err = -EINVAL;
4043                 goto out_err;
4044         }
4045
4046         if (!rdev->ops->dump_station) {
4047                 err = -EOPNOTSUPP;
4048                 goto out_err;
4049         }
4050
4051         while (1) {
4052                 memset(&sinfo, 0, sizeof(sinfo));
4053                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4054                                         mac_addr, &sinfo);
4055                 if (err == -ENOENT)
4056                         break;
4057                 if (err)
4058                         goto out_err;
4059
4060                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4061                                 NETLINK_CB(cb->skb).portid,
4062                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4063                                 rdev, wdev->netdev, mac_addr,
4064                                 &sinfo) < 0)
4065                         goto out;
4066
4067                 sta_idx++;
4068         }
4069
4070  out:
4071         cb->args[2] = sta_idx;
4072         err = skb->len;
4073  out_err:
4074         nl80211_finish_wdev_dump(rdev);
4075
4076         return err;
4077 }
4078
4079 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4080 {
4081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4082         struct net_device *dev = info->user_ptr[1];
4083         struct station_info sinfo;
4084         struct sk_buff *msg;
4085         u8 *mac_addr = NULL;
4086         int err;
4087
4088         memset(&sinfo, 0, sizeof(sinfo));
4089
4090         if (!info->attrs[NL80211_ATTR_MAC])
4091                 return -EINVAL;
4092
4093         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4094
4095         if (!rdev->ops->get_station)
4096                 return -EOPNOTSUPP;
4097
4098         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4099         if (err)
4100                 return err;
4101
4102         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4103         if (!msg)
4104                 return -ENOMEM;
4105
4106         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4107                                  info->snd_portid, info->snd_seq, 0,
4108                                  rdev, dev, mac_addr, &sinfo) < 0) {
4109                 nlmsg_free(msg);
4110                 return -ENOBUFS;
4111         }
4112
4113         return genlmsg_reply(msg, info);
4114 }
4115
4116 int cfg80211_check_station_change(struct wiphy *wiphy,
4117                                   struct station_parameters *params,
4118                                   enum cfg80211_station_type statype)
4119 {
4120         if (params->listen_interval != -1 &&
4121             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4122                 return -EINVAL;
4123
4124         if (params->support_p2p_ps != -1 &&
4125             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4126                 return -EINVAL;
4127
4128         if (params->aid &&
4129             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4130             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4131                 return -EINVAL;
4132
4133         /* When you run into this, adjust the code below for the new flag */
4134         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4135
4136         switch (statype) {
4137         case CFG80211_STA_MESH_PEER_KERNEL:
4138         case CFG80211_STA_MESH_PEER_USER:
4139                 /*
4140                  * No ignoring the TDLS flag here -- the userspace mesh
4141                  * code doesn't have the bug of including TDLS in the
4142                  * mask everywhere.
4143                  */
4144                 if (params->sta_flags_mask &
4145                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4146                                   BIT(NL80211_STA_FLAG_MFP) |
4147                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4148                         return -EINVAL;
4149                 break;
4150         case CFG80211_STA_TDLS_PEER_SETUP:
4151         case CFG80211_STA_TDLS_PEER_ACTIVE:
4152                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4153                         return -EINVAL;
4154                 /* ignore since it can't change */
4155                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4156                 break;
4157         default:
4158                 /* disallow mesh-specific things */
4159                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4160                         return -EINVAL;
4161                 if (params->local_pm)
4162                         return -EINVAL;
4163                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4164                         return -EINVAL;
4165         }
4166
4167         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4168             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4169                 /* TDLS can't be set, ... */
4170                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4171                         return -EINVAL;
4172                 /*
4173                  * ... but don't bother the driver with it. This works around
4174                  * a hostapd/wpa_supplicant issue -- it always includes the
4175                  * TLDS_PEER flag in the mask even for AP mode.
4176                  */
4177                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4178         }
4179
4180         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4181             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4182                 /* reject other things that can't change */
4183                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4184                         return -EINVAL;
4185                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4186                         return -EINVAL;
4187                 if (params->supported_rates)
4188                         return -EINVAL;
4189                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4190                         return -EINVAL;
4191         }
4192
4193         if (statype != CFG80211_STA_AP_CLIENT &&
4194             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4195                 if (params->vlan)
4196                         return -EINVAL;
4197         }
4198
4199         switch (statype) {
4200         case CFG80211_STA_AP_MLME_CLIENT:
4201                 /* Use this only for authorizing/unauthorizing a station */
4202                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4203                         return -EOPNOTSUPP;
4204                 break;
4205         case CFG80211_STA_AP_CLIENT:
4206         case CFG80211_STA_AP_CLIENT_UNASSOC:
4207                 /* accept only the listed bits */
4208                 if (params->sta_flags_mask &
4209                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4210                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4211                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4212                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4213                                   BIT(NL80211_STA_FLAG_WME) |
4214                                   BIT(NL80211_STA_FLAG_MFP)))
4215                         return -EINVAL;
4216
4217                 /* but authenticated/associated only if driver handles it */
4218                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4219                     params->sta_flags_mask &
4220                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4221                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4222                         return -EINVAL;
4223                 break;
4224         case CFG80211_STA_IBSS:
4225         case CFG80211_STA_AP_STA:
4226                 /* reject any changes other than AUTHORIZED */
4227                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4228                         return -EINVAL;
4229                 break;
4230         case CFG80211_STA_TDLS_PEER_SETUP:
4231                 /* reject any changes other than AUTHORIZED or WME */
4232                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4233                                                BIT(NL80211_STA_FLAG_WME)))
4234                         return -EINVAL;
4235                 /* force (at least) rates when authorizing */
4236                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4237                     !params->supported_rates)
4238                         return -EINVAL;
4239                 break;
4240         case CFG80211_STA_TDLS_PEER_ACTIVE:
4241                 /* reject any changes */
4242                 return -EINVAL;
4243         case CFG80211_STA_MESH_PEER_KERNEL:
4244                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4245                         return -EINVAL;
4246                 break;
4247         case CFG80211_STA_MESH_PEER_USER:
4248                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4249                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4250                         return -EINVAL;
4251                 break;
4252         }
4253
4254         return 0;
4255 }
4256 EXPORT_SYMBOL(cfg80211_check_station_change);
4257
4258 /*
4259  * Get vlan interface making sure it is running and on the right wiphy.
4260  */
4261 static struct net_device *get_vlan(struct genl_info *info,
4262                                    struct cfg80211_registered_device *rdev)
4263 {
4264         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4265         struct net_device *v;
4266         int ret;
4267
4268         if (!vlanattr)
4269                 return NULL;
4270
4271         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4272         if (!v)
4273                 return ERR_PTR(-ENODEV);
4274
4275         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4276                 ret = -EINVAL;
4277                 goto error;
4278         }
4279
4280         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4281             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4282             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4283                 ret = -EINVAL;
4284                 goto error;
4285         }
4286
4287         if (!netif_running(v)) {
4288                 ret = -ENETDOWN;
4289                 goto error;
4290         }
4291
4292         return v;
4293  error:
4294         dev_put(v);
4295         return ERR_PTR(ret);
4296 }
4297
4298 static const struct nla_policy
4299 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4300         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4301         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4302 };
4303
4304 static int nl80211_parse_sta_wme(struct genl_info *info,
4305                                  struct station_parameters *params)
4306 {
4307         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4308         struct nlattr *nla;
4309         int err;
4310
4311         /* parse WME attributes if present */
4312         if (!info->attrs[NL80211_ATTR_STA_WME])
4313                 return 0;
4314
4315         nla = info->attrs[NL80211_ATTR_STA_WME];
4316         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4317                                nl80211_sta_wme_policy);
4318         if (err)
4319                 return err;
4320
4321         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4322                 params->uapsd_queues = nla_get_u8(
4323                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4324         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4325                 return -EINVAL;
4326
4327         if (tb[NL80211_STA_WME_MAX_SP])
4328                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4329
4330         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4331                 return -EINVAL;
4332
4333         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4334
4335         return 0;
4336 }
4337
4338 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4339                                       struct station_parameters *params)
4340 {
4341         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4342                 params->supported_channels =
4343                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4344                 params->supported_channels_len =
4345                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4346                 /*
4347                  * Need to include at least one (first channel, number of
4348                  * channels) tuple for each subband, and must have proper
4349                  * tuples for the rest of the data as well.
4350                  */
4351                 if (params->supported_channels_len < 2)
4352                         return -EINVAL;
4353                 if (params->supported_channels_len % 2)
4354                         return -EINVAL;
4355         }
4356
4357         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4358                 params->supported_oper_classes =
4359                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4360                 params->supported_oper_classes_len =
4361                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4362                 /*
4363                  * The value of the Length field of the Supported Operating
4364                  * Classes element is between 2 and 253.
4365                  */
4366                 if (params->supported_oper_classes_len < 2 ||
4367                     params->supported_oper_classes_len > 253)
4368                         return -EINVAL;
4369         }
4370         return 0;
4371 }
4372
4373 static int nl80211_set_station_tdls(struct genl_info *info,
4374                                     struct station_parameters *params)
4375 {
4376         int err;
4377         /* Dummy STA entry gets updated once the peer capabilities are known */
4378         if (info->attrs[NL80211_ATTR_PEER_AID])
4379                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4380         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4381                 params->ht_capa =
4382                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4383         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4384                 params->vht_capa =
4385                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4386
4387         err = nl80211_parse_sta_channel_info(info, params);
4388         if (err)
4389                 return err;
4390
4391         return nl80211_parse_sta_wme(info, params);
4392 }
4393
4394 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4395 {
4396         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4397         struct net_device *dev = info->user_ptr[1];
4398         struct station_parameters params;
4399         u8 *mac_addr;
4400         int err;
4401
4402         memset(&params, 0, sizeof(params));
4403
4404         if (!rdev->ops->change_station)
4405                 return -EOPNOTSUPP;
4406
4407         /*
4408          * AID and listen_interval properties can be set only for unassociated
4409          * station. Include these parameters here and will check them in
4410          * cfg80211_check_station_change().
4411          */
4412         if (info->attrs[NL80211_ATTR_STA_AID])
4413                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4414
4415         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4416                 params.listen_interval =
4417                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4418         else
4419                 params.listen_interval = -1;
4420
4421         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4422                 u8 tmp;
4423
4424                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4425                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4426                         return -EINVAL;
4427
4428                 params.support_p2p_ps = tmp;
4429         } else {
4430                 params.support_p2p_ps = -1;
4431         }
4432
4433         if (!info->attrs[NL80211_ATTR_MAC])
4434                 return -EINVAL;
4435
4436         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4437
4438         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4439                 params.supported_rates =
4440                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4441                 params.supported_rates_len =
4442                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4443         }
4444
4445         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4446                 params.capability =
4447                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4448                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4449         }
4450
4451         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4452                 params.ext_capab =
4453                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4454                 params.ext_capab_len =
4455                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4456         }
4457
4458         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4459                 return -EINVAL;
4460
4461         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4462                 params.plink_action =
4463                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4464                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4465                         return -EINVAL;
4466         }
4467
4468         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4469                 params.plink_state =
4470                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4471                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4472                         return -EINVAL;
4473                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4474                         params.peer_aid = nla_get_u16(
4475                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4476                         if (params.peer_aid > IEEE80211_MAX_AID)
4477                                 return -EINVAL;
4478                 }
4479                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4480         }
4481
4482         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4483                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4484                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4485
4486                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4487                     pm > NL80211_MESH_POWER_MAX)
4488                         return -EINVAL;
4489
4490                 params.local_pm = pm;
4491         }
4492
4493         /* Include parameters for TDLS peer (will check later) */
4494         err = nl80211_set_station_tdls(info, &params);
4495         if (err)
4496                 return err;
4497
4498         params.vlan = get_vlan(info, rdev);
4499         if (IS_ERR(params.vlan))
4500                 return PTR_ERR(params.vlan);
4501
4502         switch (dev->ieee80211_ptr->iftype) {
4503         case NL80211_IFTYPE_AP:
4504         case NL80211_IFTYPE_AP_VLAN:
4505         case NL80211_IFTYPE_P2P_GO:
4506         case NL80211_IFTYPE_P2P_CLIENT:
4507         case NL80211_IFTYPE_STATION:
4508         case NL80211_IFTYPE_ADHOC:
4509         case NL80211_IFTYPE_MESH_POINT:
4510                 break;
4511         default:
4512                 err = -EOPNOTSUPP;
4513                 goto out_put_vlan;
4514         }
4515
4516         /* driver will call cfg80211_check_station_change() */
4517         err = rdev_change_station(rdev, dev, mac_addr, &params);
4518
4519  out_put_vlan:
4520         if (params.vlan)
4521                 dev_put(params.vlan);
4522
4523         return err;
4524 }
4525
4526 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4527 {
4528         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4529         int err;
4530         struct net_device *dev = info->user_ptr[1];
4531         struct station_parameters params;
4532         u8 *mac_addr = NULL;
4533         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4534                          BIT(NL80211_STA_FLAG_ASSOCIATED);
4535
4536         memset(&params, 0, sizeof(params));
4537
4538         if (!rdev->ops->add_station)
4539                 return -EOPNOTSUPP;
4540
4541         if (!info->attrs[NL80211_ATTR_MAC])
4542                 return -EINVAL;
4543
4544         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4545                 return -EINVAL;
4546
4547         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4548                 return -EINVAL;
4549
4550         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4551             !info->attrs[NL80211_ATTR_PEER_AID])
4552                 return -EINVAL;
4553
4554         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4555         params.supported_rates =
4556                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4557         params.supported_rates_len =
4558                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4559         params.listen_interval =
4560                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4561
4562         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4563                 u8 tmp;
4564
4565                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4566                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4567                         return -EINVAL;
4568
4569                 params.support_p2p_ps = tmp;
4570         } else {
4571                 /*
4572                  * if not specified, assume it's supported for P2P GO interface,
4573                  * and is NOT supported for AP interface
4574                  */
4575                 params.support_p2p_ps =
4576                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
4577         }
4578
4579         if (info->attrs[NL80211_ATTR_PEER_AID])
4580                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4581         else
4582                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4583         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4584                 return -EINVAL;
4585
4586         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4587                 params.capability =
4588                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4589                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4590         }
4591
4592         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4593                 params.ext_capab =
4594                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4595                 params.ext_capab_len =
4596                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4597         }
4598
4599         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4600                 params.ht_capa =
4601                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4602
4603         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4604                 params.vht_capa =
4605                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4606
4607         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4608                 params.opmode_notif_used = true;
4609                 params.opmode_notif =
4610                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4611         }
4612
4613         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4614                 params.plink_action =
4615                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4616                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4617                         return -EINVAL;
4618         }
4619
4620         err = nl80211_parse_sta_channel_info(info, &params);
4621         if (err)
4622                 return err;
4623
4624         err = nl80211_parse_sta_wme(info, &params);
4625         if (err)
4626                 return err;
4627
4628         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4629                 return -EINVAL;
4630
4631         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4632          * as userspace might just pass through the capabilities from the IEs
4633          * directly, rather than enforcing this restriction and returning an
4634          * error in this case.
4635          */
4636         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4637                 params.ht_capa = NULL;
4638                 params.vht_capa = NULL;
4639         }
4640
4641         /* When you run into this, adjust the code below for the new flag */
4642         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4643
4644         switch (dev->ieee80211_ptr->iftype) {
4645         case NL80211_IFTYPE_AP:
4646         case NL80211_IFTYPE_AP_VLAN:
4647         case NL80211_IFTYPE_P2P_GO:
4648                 /* ignore WME attributes if iface/sta is not capable */
4649                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4650                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4651                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4652
4653                 /* TDLS peers cannot be added */
4654                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4655                     info->attrs[NL80211_ATTR_PEER_AID])
4656                         return -EINVAL;
4657                 /* but don't bother the driver with it */
4658                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4659
4660                 /* allow authenticated/associated only if driver handles it */
4661                 if (!(rdev->wiphy.features &
4662                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4663                     params.sta_flags_mask & auth_assoc)
4664                         return -EINVAL;
4665
4666                 /* Older userspace, or userspace wanting to be compatible with
4667                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
4668                  * and assoc flags in the mask, but assumes the station will be
4669                  * added as associated anyway since this was the required driver
4670                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
4671                  * introduced.
4672                  * In order to not bother drivers with this quirk in the API
4673                  * set the flags in both the mask and set for new stations in
4674                  * this case.
4675                  */
4676                 if (!(params.sta_flags_mask & auth_assoc)) {
4677                         params.sta_flags_mask |= auth_assoc;
4678                         params.sta_flags_set |= auth_assoc;
4679                 }
4680
4681                 /* must be last in here for error handling */
4682                 params.vlan = get_vlan(info, rdev);
4683                 if (IS_ERR(params.vlan))
4684                         return PTR_ERR(params.vlan);
4685                 break;
4686         case NL80211_IFTYPE_MESH_POINT:
4687                 /* ignore uAPSD data */
4688                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4689
4690                 /* associated is disallowed */
4691                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4692                         return -EINVAL;
4693                 /* TDLS peers cannot be added */
4694                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4695                     info->attrs[NL80211_ATTR_PEER_AID])
4696                         return -EINVAL;
4697                 break;
4698         case NL80211_IFTYPE_STATION:
4699         case NL80211_IFTYPE_P2P_CLIENT:
4700                 /* ignore uAPSD data */
4701                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4702
4703                 /* these are disallowed */
4704                 if (params.sta_flags_mask &
4705                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4706                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4707                         return -EINVAL;
4708                 /* Only TDLS peers can be added */
4709                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4710                         return -EINVAL;
4711                 /* Can only add if TDLS ... */
4712                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4713                         return -EOPNOTSUPP;
4714                 /* ... with external setup is supported */
4715                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4716                         return -EOPNOTSUPP;
4717                 /*
4718                  * Older wpa_supplicant versions always mark the TDLS peer
4719                  * as authorized, but it shouldn't yet be.
4720                  */
4721                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4722                 break;
4723         default:
4724                 return -EOPNOTSUPP;
4725         }
4726
4727         /* be aware of params.vlan when changing code here */
4728
4729         err = rdev_add_station(rdev, dev, mac_addr, &params);
4730
4731         if (params.vlan)
4732                 dev_put(params.vlan);
4733         return err;
4734 }
4735
4736 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4737 {
4738         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4739         struct net_device *dev = info->user_ptr[1];
4740         struct station_del_parameters params;
4741
4742         memset(&params, 0, sizeof(params));
4743
4744         if (info->attrs[NL80211_ATTR_MAC])
4745                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4746
4747         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4748             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4749             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4750             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4751                 return -EINVAL;
4752
4753         if (!rdev->ops->del_station)
4754                 return -EOPNOTSUPP;
4755
4756         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4757                 params.subtype =
4758                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4759                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4760                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4761                         return -EINVAL;
4762         } else {
4763                 /* Default to Deauthentication frame */
4764                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4765         }
4766
4767         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4768                 params.reason_code =
4769                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4770                 if (params.reason_code == 0)
4771                         return -EINVAL; /* 0 is reserved */
4772         } else {
4773                 /* Default to reason code 2 */
4774                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4775         }
4776
4777         return rdev_del_station(rdev, dev, &params);
4778 }
4779
4780 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4781                                 int flags, struct net_device *dev,
4782                                 u8 *dst, u8 *next_hop,
4783                                 struct mpath_info *pinfo)
4784 {
4785         void *hdr;
4786         struct nlattr *pinfoattr;
4787
4788         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4789         if (!hdr)
4790                 return -1;
4791
4792         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4793             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4794             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4795             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4796                 goto nla_put_failure;
4797
4798         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4799         if (!pinfoattr)
4800                 goto nla_put_failure;
4801         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4802             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4803                         pinfo->frame_qlen))
4804                 goto nla_put_failure;
4805         if (((pinfo->filled & MPATH_INFO_SN) &&
4806              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4807             ((pinfo->filled & MPATH_INFO_METRIC) &&
4808              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4809                          pinfo->metric)) ||
4810             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4811              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4812                          pinfo->exptime)) ||
4813             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4814              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4815                         pinfo->flags)) ||
4816             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4817              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4818                          pinfo->discovery_timeout)) ||
4819             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4820              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4821                         pinfo->discovery_retries)))
4822                 goto nla_put_failure;
4823
4824         nla_nest_end(msg, pinfoattr);
4825
4826         genlmsg_end(msg, hdr);
4827         return 0;
4828
4829  nla_put_failure:
4830         genlmsg_cancel(msg, hdr);
4831         return -EMSGSIZE;
4832 }
4833
4834 static int nl80211_dump_mpath(struct sk_buff *skb,
4835                               struct netlink_callback *cb)
4836 {
4837         struct mpath_info pinfo;
4838         struct cfg80211_registered_device *rdev;
4839         struct wireless_dev *wdev;
4840         u8 dst[ETH_ALEN];
4841         u8 next_hop[ETH_ALEN];
4842         int path_idx = cb->args[2];
4843         int err;
4844
4845         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4846         if (err)
4847                 return err;
4848
4849         if (!rdev->ops->dump_mpath) {
4850                 err = -EOPNOTSUPP;
4851                 goto out_err;
4852         }
4853
4854         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4855                 err = -EOPNOTSUPP;
4856                 goto out_err;
4857         }
4858
4859         while (1) {
4860                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4861                                       next_hop, &pinfo);
4862                 if (err == -ENOENT)
4863                         break;
4864                 if (err)
4865                         goto out_err;
4866
4867                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4868                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4869                                        wdev->netdev, dst, next_hop,
4870                                        &pinfo) < 0)
4871                         goto out;
4872
4873                 path_idx++;
4874         }
4875
4876  out:
4877         cb->args[2] = path_idx;
4878         err = skb->len;
4879  out_err:
4880         nl80211_finish_wdev_dump(rdev);
4881         return err;
4882 }
4883
4884 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4885 {
4886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4887         int err;
4888         struct net_device *dev = info->user_ptr[1];
4889         struct mpath_info pinfo;
4890         struct sk_buff *msg;
4891         u8 *dst = NULL;
4892         u8 next_hop[ETH_ALEN];
4893
4894         memset(&pinfo, 0, sizeof(pinfo));
4895
4896         if (!info->attrs[NL80211_ATTR_MAC])
4897                 return -EINVAL;
4898
4899         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4900
4901         if (!rdev->ops->get_mpath)
4902                 return -EOPNOTSUPP;
4903
4904         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4905                 return -EOPNOTSUPP;
4906
4907         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4908         if (err)
4909                 return err;
4910
4911         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4912         if (!msg)
4913                 return -ENOMEM;
4914
4915         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4916                                  dev, dst, next_hop, &pinfo) < 0) {
4917                 nlmsg_free(msg);
4918                 return -ENOBUFS;
4919         }
4920
4921         return genlmsg_reply(msg, info);
4922 }
4923
4924 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4925 {
4926         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4927         struct net_device *dev = info->user_ptr[1];
4928         u8 *dst = NULL;
4929         u8 *next_hop = NULL;
4930
4931         if (!info->attrs[NL80211_ATTR_MAC])
4932                 return -EINVAL;
4933
4934         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4935                 return -EINVAL;
4936
4937         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4938         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4939
4940         if (!rdev->ops->change_mpath)
4941                 return -EOPNOTSUPP;
4942
4943         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4944                 return -EOPNOTSUPP;
4945
4946         return rdev_change_mpath(rdev, dev, dst, next_hop);
4947 }
4948
4949 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4950 {
4951         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4952         struct net_device *dev = info->user_ptr[1];
4953         u8 *dst = NULL;
4954         u8 *next_hop = NULL;
4955
4956         if (!info->attrs[NL80211_ATTR_MAC])
4957                 return -EINVAL;
4958
4959         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4960                 return -EINVAL;
4961
4962         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4963         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4964
4965         if (!rdev->ops->add_mpath)
4966                 return -EOPNOTSUPP;
4967
4968         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4969                 return -EOPNOTSUPP;
4970
4971         return rdev_add_mpath(rdev, dev, dst, next_hop);
4972 }
4973
4974 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4975 {
4976         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4977         struct net_device *dev = info->user_ptr[1];
4978         u8 *dst = NULL;
4979
4980         if (info->attrs[NL80211_ATTR_MAC])
4981                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4982
4983         if (!rdev->ops->del_mpath)
4984                 return -EOPNOTSUPP;
4985
4986         return rdev_del_mpath(rdev, dev, dst);
4987 }
4988
4989 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4990 {
4991         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4992         int err;
4993         struct net_device *dev = info->user_ptr[1];
4994         struct mpath_info pinfo;
4995         struct sk_buff *msg;
4996         u8 *dst = NULL;
4997         u8 mpp[ETH_ALEN];
4998
4999         memset(&pinfo, 0, sizeof(pinfo));
5000
5001         if (!info->attrs[NL80211_ATTR_MAC])
5002                 return -EINVAL;
5003
5004         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5005
5006         if (!rdev->ops->get_mpp)
5007                 return -EOPNOTSUPP;
5008
5009         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5010                 return -EOPNOTSUPP;
5011
5012         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
5013         if (err)
5014                 return err;
5015
5016         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5017         if (!msg)
5018                 return -ENOMEM;
5019
5020         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5021                                dev, dst, mpp, &pinfo) < 0) {
5022                 nlmsg_free(msg);
5023                 return -ENOBUFS;
5024         }
5025
5026         return genlmsg_reply(msg, info);
5027 }
5028
5029 static int nl80211_dump_mpp(struct sk_buff *skb,
5030                             struct netlink_callback *cb)
5031 {
5032         struct mpath_info pinfo;
5033         struct cfg80211_registered_device *rdev;
5034         struct wireless_dev *wdev;
5035         u8 dst[ETH_ALEN];
5036         u8 mpp[ETH_ALEN];
5037         int path_idx = cb->args[2];
5038         int err;
5039
5040         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5041         if (err)
5042                 return err;
5043
5044         if (!rdev->ops->dump_mpp) {
5045                 err = -EOPNOTSUPP;
5046                 goto out_err;
5047         }
5048
5049         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5050                 err = -EOPNOTSUPP;
5051                 goto out_err;
5052         }
5053
5054         while (1) {
5055                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5056                                     mpp, &pinfo);
5057                 if (err == -ENOENT)
5058                         break;
5059                 if (err)
5060                         goto out_err;
5061
5062                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5063                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5064                                        wdev->netdev, dst, mpp,
5065                                        &pinfo) < 0)
5066                         goto out;
5067
5068                 path_idx++;
5069         }
5070
5071  out:
5072         cb->args[2] = path_idx;
5073         err = skb->len;
5074  out_err:
5075         nl80211_finish_wdev_dump(rdev);
5076         return err;
5077 }
5078
5079 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5080 {
5081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5082         struct net_device *dev = info->user_ptr[1];
5083         struct wireless_dev *wdev = dev->ieee80211_ptr;
5084         struct bss_parameters params;
5085         int err;
5086
5087         memset(&params, 0, sizeof(params));
5088         /* default to not changing parameters */
5089         params.use_cts_prot = -1;
5090         params.use_short_preamble = -1;
5091         params.use_short_slot_time = -1;
5092         params.ap_isolate = -1;
5093         params.ht_opmode = -1;
5094         params.p2p_ctwindow = -1;
5095         params.p2p_opp_ps = -1;
5096
5097         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5098                 params.use_cts_prot =
5099                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5100         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5101                 params.use_short_preamble =
5102                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5103         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5104                 params.use_short_slot_time =
5105                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5106         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5107                 params.basic_rates =
5108                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5109                 params.basic_rates_len =
5110                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5111         }
5112         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5113                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5114         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5115                 params.ht_opmode =
5116                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5117
5118         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5119                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5120                         return -EINVAL;
5121                 params.p2p_ctwindow =
5122                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5123                 if (params.p2p_ctwindow < 0)
5124                         return -EINVAL;
5125                 if (params.p2p_ctwindow != 0 &&
5126                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5127                         return -EINVAL;
5128         }
5129
5130         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5131                 u8 tmp;
5132
5133                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5134                         return -EINVAL;
5135                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5136                 if (tmp > 1)
5137                         return -EINVAL;
5138                 params.p2p_opp_ps = tmp;
5139                 if (params.p2p_opp_ps &&
5140                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5141                         return -EINVAL;
5142         }
5143
5144         if (!rdev->ops->change_bss)
5145                 return -EOPNOTSUPP;
5146
5147         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5148             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5149                 return -EOPNOTSUPP;
5150
5151         wdev_lock(wdev);
5152         err = rdev_change_bss(rdev, dev, &params);
5153         wdev_unlock(wdev);
5154
5155         return err;
5156 }
5157
5158 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5159 {
5160         char *data = NULL;
5161         bool is_indoor;
5162         enum nl80211_user_reg_hint_type user_reg_hint_type;
5163         u32 owner_nlportid;
5164
5165         /*
5166          * You should only get this when cfg80211 hasn't yet initialized
5167          * completely when built-in to the kernel right between the time
5168          * window between nl80211_init() and regulatory_init(), if that is
5169          * even possible.
5170          */
5171         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5172                 return -EINPROGRESS;
5173
5174         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5175                 user_reg_hint_type =
5176                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5177         else
5178                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5179
5180         switch (user_reg_hint_type) {
5181         case NL80211_USER_REG_HINT_USER:
5182         case NL80211_USER_REG_HINT_CELL_BASE:
5183                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5184                         return -EINVAL;
5185
5186                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5187                 return regulatory_hint_user(data, user_reg_hint_type);
5188         case NL80211_USER_REG_HINT_INDOOR:
5189                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5190                         owner_nlportid = info->snd_portid;
5191                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5192                 } else {
5193                         owner_nlportid = 0;
5194                         is_indoor = true;
5195                 }
5196
5197                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5198         default:
5199                 return -EINVAL;
5200         }
5201 }
5202
5203 static int nl80211_get_mesh_config(struct sk_buff *skb,
5204                                    struct genl_info *info)
5205 {
5206         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5207         struct net_device *dev = info->user_ptr[1];
5208         struct wireless_dev *wdev = dev->ieee80211_ptr;
5209         struct mesh_config cur_params;
5210         int err = 0;
5211         void *hdr;
5212         struct nlattr *pinfoattr;
5213         struct sk_buff *msg;
5214
5215         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5216                 return -EOPNOTSUPP;
5217
5218         if (!rdev->ops->get_mesh_config)
5219                 return -EOPNOTSUPP;
5220
5221         wdev_lock(wdev);
5222         /* If not connected, get default parameters */
5223         if (!wdev->mesh_id_len)
5224                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5225         else
5226                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5227         wdev_unlock(wdev);
5228
5229         if (err)
5230                 return err;
5231
5232         /* Draw up a netlink message to send back */
5233         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5234         if (!msg)
5235                 return -ENOMEM;
5236         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5237                              NL80211_CMD_GET_MESH_CONFIG);
5238         if (!hdr)
5239                 goto out;
5240         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5241         if (!pinfoattr)
5242                 goto nla_put_failure;
5243         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5244             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5245                         cur_params.dot11MeshRetryTimeout) ||
5246             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5247                         cur_params.dot11MeshConfirmTimeout) ||
5248             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5249                         cur_params.dot11MeshHoldingTimeout) ||
5250             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5251                         cur_params.dot11MeshMaxPeerLinks) ||
5252             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5253                        cur_params.dot11MeshMaxRetries) ||
5254             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5255                        cur_params.dot11MeshTTL) ||
5256             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5257                        cur_params.element_ttl) ||
5258             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5259                        cur_params.auto_open_plinks) ||
5260             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5261                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5262             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5263                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5264             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5265                         cur_params.path_refresh_time) ||
5266             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5267                         cur_params.min_discovery_timeout) ||
5268             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5269                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5270             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5271                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5272             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5273                         cur_params.dot11MeshHWMPperrMinInterval) ||
5274             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5275                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5276             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5277                        cur_params.dot11MeshHWMPRootMode) ||
5278             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5279                         cur_params.dot11MeshHWMPRannInterval) ||
5280             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5281                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5282             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5283                        cur_params.dot11MeshForwarding) ||
5284             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5285                         cur_params.rssi_threshold) ||
5286             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5287                         cur_params.ht_opmode) ||
5288             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5289                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5290             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5291                         cur_params.dot11MeshHWMProotInterval) ||
5292             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5293                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5294             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5295                         cur_params.power_mode) ||
5296             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5297                         cur_params.dot11MeshAwakeWindowDuration) ||
5298             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5299                         cur_params.plink_timeout))
5300                 goto nla_put_failure;
5301         nla_nest_end(msg, pinfoattr);
5302         genlmsg_end(msg, hdr);
5303         return genlmsg_reply(msg, info);
5304
5305  nla_put_failure:
5306         genlmsg_cancel(msg, hdr);
5307  out:
5308         nlmsg_free(msg);
5309         return -ENOBUFS;
5310 }
5311
5312 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5313         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5314         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5315         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5316         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5317         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5318         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5319         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5320         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5321         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5322         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5323         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5324         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5325         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5326         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5327         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5328         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5329         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5330         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5331         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5332         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5333         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5334         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5335         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5336         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5337         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5338         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5339         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5340         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5341 };
5342
5343 static const struct nla_policy
5344         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5345         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5346         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5347         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5348         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5349         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5350         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5351         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5352                                     .len = IEEE80211_MAX_DATA_LEN },
5353         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5354 };
5355
5356 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5357 {
5358         u8 val = nla_get_u8(nla);
5359         if (val < min || val > max)
5360                 return -EINVAL;
5361         *out = val;
5362         return 0;
5363 }
5364
5365 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5366 {
5367         u8 val = nla_get_u8(nla);
5368         if (val < min || val > max)
5369                 return -EINVAL;
5370         *out = val;
5371         return 0;
5372 }
5373
5374 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5375 {
5376         u16 val = nla_get_u16(nla);
5377         if (val < min || val > max)
5378                 return -EINVAL;
5379         *out = val;
5380         return 0;
5381 }
5382
5383 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5384 {
5385         u32 val = nla_get_u32(nla);
5386         if (val < min || val > max)
5387                 return -EINVAL;
5388         *out = val;
5389         return 0;
5390 }
5391
5392 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5393 {
5394         s32 val = nla_get_s32(nla);
5395         if (val < min || val > max)
5396                 return -EINVAL;
5397         *out = val;
5398         return 0;
5399 }
5400
5401 static int nl80211_check_power_mode(const struct nlattr *nla,
5402                                     enum nl80211_mesh_power_mode min,
5403                                     enum nl80211_mesh_power_mode max,
5404                                     enum nl80211_mesh_power_mode *out)
5405 {
5406         u32 val = nla_get_u32(nla);
5407         if (val < min || val > max)
5408                 return -EINVAL;
5409         *out = val;
5410         return 0;
5411 }
5412
5413 static int nl80211_parse_mesh_config(struct genl_info *info,
5414                                      struct mesh_config *cfg,
5415                                      u32 *mask_out)
5416 {
5417         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5418         u32 mask = 0;
5419         u16 ht_opmode;
5420
5421 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5422 do {                                                                        \
5423         if (tb[attr]) {                                                     \
5424                 if (fn(tb[attr], min, max, &cfg->param))                    \
5425                         return -EINVAL;                                     \
5426                 mask |= (1 << (attr - 1));                                  \
5427         }                                                                   \
5428 } while (0)
5429
5430         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5431                 return -EINVAL;
5432         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5433                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5434                              nl80211_meshconf_params_policy))
5435                 return -EINVAL;
5436
5437         /* This makes sure that there aren't more than 32 mesh config
5438          * parameters (otherwise our bitfield scheme would not work.) */
5439         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5440
5441         /* Fill in the params struct */
5442         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5443                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5444                                   nl80211_check_u16);
5445         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5446                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5447                                   nl80211_check_u16);
5448         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5449                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5450                                   nl80211_check_u16);
5451         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5452                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5453                                   nl80211_check_u16);
5454         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5455                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5456                                   nl80211_check_u8);
5457         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5458                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5459         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5460                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5461                                   nl80211_check_u8);
5462         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5463                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5464                                   nl80211_check_bool);
5465         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5466                                   1, 255, mask,
5467                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5468                                   nl80211_check_u32);
5469         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5470                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5471                                   nl80211_check_u8);
5472         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5473                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5474                                   nl80211_check_u32);
5475         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5476                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5477                                   nl80211_check_u16);
5478         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5479                                   1, 65535, mask,
5480                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5481                                   nl80211_check_u32);
5482         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5483                                   1, 65535, mask,
5484                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5485                                   nl80211_check_u16);
5486         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5487                                   1, 65535, mask,
5488                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5489                                   nl80211_check_u16);
5490         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5491                                   dot11MeshHWMPnetDiameterTraversalTime,
5492                                   1, 65535, mask,
5493                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5494                                   nl80211_check_u16);
5495         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5496                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5497                                   nl80211_check_u8);
5498         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5499                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5500                                   nl80211_check_u16);
5501         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5502                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5503                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5504                                   nl80211_check_bool);
5505         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5506                                   mask, NL80211_MESHCONF_FORWARDING,
5507                                   nl80211_check_bool);
5508         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5509                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5510                                   nl80211_check_s32);
5511         /*
5512          * Check HT operation mode based on
5513          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5514          */
5515         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5516                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5517
5518                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5519                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5520                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5521                         return -EINVAL;
5522
5523                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5524                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5525                         return -EINVAL;
5526
5527                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5528                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5529                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5530                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
5531                                 return -EINVAL;
5532                         break;
5533                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
5534                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
5535                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5536                                 return -EINVAL;
5537                         break;
5538                 }
5539                 cfg->ht_opmode = ht_opmode;
5540         }
5541         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5542                                   1, 65535, mask,
5543                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5544                                   nl80211_check_u32);
5545         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5546                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5547                                   nl80211_check_u16);
5548         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5549                                   dot11MeshHWMPconfirmationInterval,
5550                                   1, 65535, mask,
5551                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5552                                   nl80211_check_u16);
5553         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5554                                   NL80211_MESH_POWER_ACTIVE,
5555                                   NL80211_MESH_POWER_MAX,
5556                                   mask, NL80211_MESHCONF_POWER_MODE,
5557                                   nl80211_check_power_mode);
5558         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5559                                   0, 65535, mask,
5560                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
5561         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5562                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5563                                   nl80211_check_u32);
5564         if (mask_out)
5565                 *mask_out = mask;
5566
5567         return 0;
5568
5569 #undef FILL_IN_MESH_PARAM_IF_SET
5570 }
5571
5572 static int nl80211_parse_mesh_setup(struct genl_info *info,
5573                                      struct mesh_setup *setup)
5574 {
5575         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5576         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5577
5578         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5579                 return -EINVAL;
5580         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5581                              info->attrs[NL80211_ATTR_MESH_SETUP],
5582                              nl80211_mesh_setup_params_policy))
5583                 return -EINVAL;
5584
5585         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5586                 setup->sync_method =
5587                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5588                  IEEE80211_SYNC_METHOD_VENDOR :
5589                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5590
5591         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5592                 setup->path_sel_proto =
5593                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5594                  IEEE80211_PATH_PROTOCOL_VENDOR :
5595                  IEEE80211_PATH_PROTOCOL_HWMP;
5596
5597         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5598                 setup->path_metric =
5599                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5600                  IEEE80211_PATH_METRIC_VENDOR :
5601                  IEEE80211_PATH_METRIC_AIRTIME;
5602
5603         if (tb[NL80211_MESH_SETUP_IE]) {
5604                 struct nlattr *ieattr =
5605                         tb[NL80211_MESH_SETUP_IE];
5606                 if (!is_valid_ie_attr(ieattr))
5607                         return -EINVAL;
5608                 setup->ie = nla_data(ieattr);
5609                 setup->ie_len = nla_len(ieattr);
5610         }
5611         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5612             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5613                 return -EINVAL;
5614         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5615         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5616         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5617         if (setup->is_secure)
5618                 setup->user_mpm = true;
5619
5620         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5621                 if (!setup->user_mpm)
5622                         return -EINVAL;
5623                 setup->auth_id =
5624                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5625         }
5626
5627         return 0;
5628 }
5629
5630 static int nl80211_update_mesh_config(struct sk_buff *skb,
5631                                       struct genl_info *info)
5632 {
5633         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5634         struct net_device *dev = info->user_ptr[1];
5635         struct wireless_dev *wdev = dev->ieee80211_ptr;
5636         struct mesh_config cfg;
5637         u32 mask;
5638         int err;
5639
5640         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5641                 return -EOPNOTSUPP;
5642
5643         if (!rdev->ops->update_mesh_config)
5644                 return -EOPNOTSUPP;
5645
5646         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5647         if (err)
5648                 return err;
5649
5650         wdev_lock(wdev);
5651         if (!wdev->mesh_id_len)
5652                 err = -ENOLINK;
5653
5654         if (!err)
5655                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5656
5657         wdev_unlock(wdev);
5658
5659         return err;
5660 }
5661
5662 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5663                               struct sk_buff *msg)
5664 {
5665         struct nlattr *nl_reg_rules;
5666         unsigned int i;
5667
5668         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5669             (regdom->dfs_region &&
5670              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5671                 goto nla_put_failure;
5672
5673         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5674         if (!nl_reg_rules)
5675                 goto nla_put_failure;
5676
5677         for (i = 0; i < regdom->n_reg_rules; i++) {
5678                 struct nlattr *nl_reg_rule;
5679                 const struct ieee80211_reg_rule *reg_rule;
5680                 const struct ieee80211_freq_range *freq_range;
5681                 const struct ieee80211_power_rule *power_rule;
5682                 unsigned int max_bandwidth_khz;
5683
5684                 reg_rule = &regdom->reg_rules[i];
5685                 freq_range = &reg_rule->freq_range;
5686                 power_rule = &reg_rule->power_rule;
5687
5688                 nl_reg_rule = nla_nest_start(msg, i);
5689                 if (!nl_reg_rule)
5690                         goto nla_put_failure;
5691
5692                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5693                 if (!max_bandwidth_khz)
5694                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5695                                                                   reg_rule);
5696
5697                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5698                                 reg_rule->flags) ||
5699                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5700                                 freq_range->start_freq_khz) ||
5701                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5702                                 freq_range->end_freq_khz) ||
5703                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5704                                 max_bandwidth_khz) ||
5705                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5706                                 power_rule->max_antenna_gain) ||
5707                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5708                                 power_rule->max_eirp) ||
5709                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5710                                 reg_rule->dfs_cac_ms))
5711                         goto nla_put_failure;
5712
5713                 nla_nest_end(msg, nl_reg_rule);
5714         }
5715
5716         nla_nest_end(msg, nl_reg_rules);
5717         return 0;
5718
5719 nla_put_failure:
5720         return -EMSGSIZE;
5721 }
5722
5723 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5724 {
5725         const struct ieee80211_regdomain *regdom = NULL;
5726         struct cfg80211_registered_device *rdev;
5727         struct wiphy *wiphy = NULL;
5728         struct sk_buff *msg;
5729         void *hdr;
5730
5731         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5732         if (!msg)
5733                 return -ENOBUFS;
5734
5735         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5736                              NL80211_CMD_GET_REG);
5737         if (!hdr)
5738                 goto put_failure;
5739
5740         if (info->attrs[NL80211_ATTR_WIPHY]) {
5741                 bool self_managed;
5742
5743                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5744                 if (IS_ERR(rdev)) {
5745                         nlmsg_free(msg);
5746                         return PTR_ERR(rdev);
5747                 }
5748
5749                 wiphy = &rdev->wiphy;
5750                 self_managed = wiphy->regulatory_flags &
5751                                REGULATORY_WIPHY_SELF_MANAGED;
5752                 regdom = get_wiphy_regdom(wiphy);
5753
5754                 /* a self-managed-reg device must have a private regdom */
5755                 if (WARN_ON(!regdom && self_managed)) {
5756                         nlmsg_free(msg);
5757                         return -EINVAL;
5758                 }
5759
5760                 if (regdom &&
5761                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5762                         goto nla_put_failure;
5763         }
5764
5765         if (!wiphy && reg_last_request_cell_base() &&
5766             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5767                         NL80211_USER_REG_HINT_CELL_BASE))
5768                 goto nla_put_failure;
5769
5770         rcu_read_lock();
5771
5772         if (!regdom)
5773                 regdom = rcu_dereference(cfg80211_regdomain);
5774
5775         if (nl80211_put_regdom(regdom, msg))
5776                 goto nla_put_failure_rcu;
5777
5778         rcu_read_unlock();
5779
5780         genlmsg_end(msg, hdr);
5781         return genlmsg_reply(msg, info);
5782
5783 nla_put_failure_rcu:
5784         rcu_read_unlock();
5785 nla_put_failure:
5786         genlmsg_cancel(msg, hdr);
5787 put_failure:
5788         nlmsg_free(msg);
5789         return -EMSGSIZE;
5790 }
5791
5792 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5793                                u32 seq, int flags, struct wiphy *wiphy,
5794                                const struct ieee80211_regdomain *regdom)
5795 {
5796         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5797                                    NL80211_CMD_GET_REG);
5798
5799         if (!hdr)
5800                 return -1;
5801
5802         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5803
5804         if (nl80211_put_regdom(regdom, msg))
5805                 goto nla_put_failure;
5806
5807         if (!wiphy && reg_last_request_cell_base() &&
5808             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5809                         NL80211_USER_REG_HINT_CELL_BASE))
5810                 goto nla_put_failure;
5811
5812         if (wiphy &&
5813             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5814                 goto nla_put_failure;
5815
5816         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5817             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5818                 goto nla_put_failure;
5819
5820         genlmsg_end(msg, hdr);
5821         return 0;
5822
5823 nla_put_failure:
5824         genlmsg_cancel(msg, hdr);
5825         return -EMSGSIZE;
5826 }
5827
5828 static int nl80211_get_reg_dump(struct sk_buff *skb,
5829                                 struct netlink_callback *cb)
5830 {
5831         const struct ieee80211_regdomain *regdom = NULL;
5832         struct cfg80211_registered_device *rdev;
5833         int err, reg_idx, start = cb->args[2];
5834
5835         rtnl_lock();
5836
5837         if (cfg80211_regdomain && start == 0) {
5838                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5839                                           NLM_F_MULTI, NULL,
5840                                           rtnl_dereference(cfg80211_regdomain));
5841                 if (err < 0)
5842                         goto out_err;
5843         }
5844
5845         /* the global regdom is idx 0 */
5846         reg_idx = 1;
5847         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5848                 regdom = get_wiphy_regdom(&rdev->wiphy);
5849                 if (!regdom)
5850                         continue;
5851
5852                 if (++reg_idx <= start)
5853                         continue;
5854
5855                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5856                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5857                 if (err < 0) {
5858                         reg_idx--;
5859                         break;
5860                 }
5861         }
5862
5863         cb->args[2] = reg_idx;
5864         err = skb->len;
5865 out_err:
5866         rtnl_unlock();
5867         return err;
5868 }
5869
5870 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5871 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5872         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5873         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5874         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5875         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5876         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5877         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5878         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5879 };
5880
5881 static int parse_reg_rule(struct nlattr *tb[],
5882         struct ieee80211_reg_rule *reg_rule)
5883 {
5884         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5885         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5886
5887         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5888                 return -EINVAL;
5889         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5890                 return -EINVAL;
5891         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5892                 return -EINVAL;
5893         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5894                 return -EINVAL;
5895         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5896                 return -EINVAL;
5897
5898         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5899
5900         freq_range->start_freq_khz =
5901                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5902         freq_range->end_freq_khz =
5903                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5904         freq_range->max_bandwidth_khz =
5905                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5906
5907         power_rule->max_eirp =
5908                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5909
5910         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5911                 power_rule->max_antenna_gain =
5912                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5913
5914         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5915                 reg_rule->dfs_cac_ms =
5916                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5917
5918         return 0;
5919 }
5920
5921 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5922 {
5923         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5924         struct nlattr *nl_reg_rule;
5925         char *alpha2;
5926         int rem_reg_rules, r;
5927         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5928         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5929         struct ieee80211_regdomain *rd;
5930
5931         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5932                 return -EINVAL;
5933
5934         if (!info->attrs[NL80211_ATTR_REG_RULES])
5935                 return -EINVAL;
5936
5937         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5938
5939         if (info->attrs[NL80211_ATTR_DFS_REGION])
5940                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5941
5942         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5943                             rem_reg_rules) {
5944                 num_rules++;
5945                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5946                         return -EINVAL;
5947         }
5948
5949         if (!reg_is_valid_request(alpha2))
5950                 return -EINVAL;
5951
5952         size_of_regd = sizeof(struct ieee80211_regdomain) +
5953                        num_rules * sizeof(struct ieee80211_reg_rule);
5954
5955         rd = kzalloc(size_of_regd, GFP_KERNEL);
5956         if (!rd)
5957                 return -ENOMEM;
5958
5959         rd->n_reg_rules = num_rules;
5960         rd->alpha2[0] = alpha2[0];
5961         rd->alpha2[1] = alpha2[1];
5962
5963         /*
5964          * Disable DFS master mode if the DFS region was
5965          * not supported or known on this kernel.
5966          */
5967         if (reg_supported_dfs_region(dfs_region))
5968                 rd->dfs_region = dfs_region;
5969
5970         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5971                             rem_reg_rules) {
5972                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5973                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5974                               reg_rule_policy);
5975                 if (r)
5976                         goto bad_reg;
5977                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5978                 if (r)
5979                         goto bad_reg;
5980
5981                 rule_idx++;
5982
5983                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5984                         r = -EINVAL;
5985                         goto bad_reg;
5986                 }
5987         }
5988
5989         /* set_regdom takes ownership of rd */
5990         return set_regdom(rd, REGD_SOURCE_CRDA);
5991  bad_reg:
5992         kfree(rd);
5993         return r;
5994 }
5995 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5996
5997 static int validate_scan_freqs(struct nlattr *freqs)
5998 {
5999         struct nlattr *attr1, *attr2;
6000         int n_channels = 0, tmp1, tmp2;
6001
6002         nla_for_each_nested(attr1, freqs, tmp1) {
6003                 n_channels++;
6004                 /*
6005                  * Some hardware has a limited channel list for
6006                  * scanning, and it is pretty much nonsensical
6007                  * to scan for a channel twice, so disallow that
6008                  * and don't require drivers to check that the
6009                  * channel list they get isn't longer than what
6010                  * they can scan, as long as they can scan all
6011                  * the channels they registered at once.
6012                  */
6013                 nla_for_each_nested(attr2, freqs, tmp2)
6014                         if (attr1 != attr2 &&
6015                             nla_get_u32(attr1) == nla_get_u32(attr2))
6016                                 return 0;
6017         }
6018
6019         return n_channels;
6020 }
6021
6022 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
6023 {
6024         return b < NUM_NL80211_BANDS && wiphy->bands[b];
6025 }
6026
6027 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
6028                             struct cfg80211_bss_selection *bss_select)
6029 {
6030         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
6031         struct nlattr *nest;
6032         int err;
6033         bool found = false;
6034         int i;
6035
6036         /* only process one nested attribute */
6037         nest = nla_data(nla);
6038         if (!nla_ok(nest, nla_len(nest)))
6039                 return -EINVAL;
6040
6041         err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest),
6042                         nla_len(nest), nl80211_bss_select_policy);
6043         if (err)
6044                 return err;
6045
6046         /* only one attribute may be given */
6047         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6048                 if (attr[i]) {
6049                         if (found)
6050                                 return -EINVAL;
6051                         found = true;
6052                 }
6053         }
6054
6055         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6056
6057         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6058                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6059
6060         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6061                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6062                 bss_select->param.band_pref =
6063                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6064                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6065                         return -EINVAL;
6066         }
6067
6068         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6069                 struct nl80211_bss_select_rssi_adjust *adj_param;
6070
6071                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6072                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6073                 bss_select->param.adjust.band = adj_param->band;
6074                 bss_select->param.adjust.delta = adj_param->delta;
6075                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6076                         return -EINVAL;
6077         }
6078
6079         /* user-space did not provide behaviour attribute */
6080         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6081                 return -EINVAL;
6082
6083         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6084                 return -EINVAL;
6085
6086         return 0;
6087 }
6088
6089 static int nl80211_parse_random_mac(struct nlattr **attrs,
6090                                     u8 *mac_addr, u8 *mac_addr_mask)
6091 {
6092         int i;
6093
6094         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6095                 eth_zero_addr(mac_addr);
6096                 eth_zero_addr(mac_addr_mask);
6097                 mac_addr[0] = 0x2;
6098                 mac_addr_mask[0] = 0x3;
6099
6100                 return 0;
6101         }
6102
6103         /* need both or none */
6104         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6105                 return -EINVAL;
6106
6107         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6108         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6109
6110         /* don't allow or configure an mcast address */
6111         if (!is_multicast_ether_addr(mac_addr_mask) ||
6112             is_multicast_ether_addr(mac_addr))
6113                 return -EINVAL;
6114
6115         /*
6116          * allow users to pass a MAC address that has bits set outside
6117          * of the mask, but don't bother drivers with having to deal
6118          * with such bits
6119          */
6120         for (i = 0; i < ETH_ALEN; i++)
6121                 mac_addr[i] &= mac_addr_mask[i];
6122
6123         return 0;
6124 }
6125
6126 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6127 {
6128         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6129         struct wireless_dev *wdev = info->user_ptr[1];
6130         struct cfg80211_scan_request *request;
6131         struct nlattr *attr;
6132         struct wiphy *wiphy;
6133         int err, tmp, n_ssids = 0, n_channels, i;
6134         size_t ie_len;
6135
6136         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6137                 return -EINVAL;
6138
6139         wiphy = &rdev->wiphy;
6140
6141         if (!rdev->ops->scan)
6142                 return -EOPNOTSUPP;
6143
6144         if (rdev->scan_req || rdev->scan_msg) {
6145                 err = -EBUSY;
6146                 goto unlock;
6147         }
6148
6149         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6150                 n_channels = validate_scan_freqs(
6151                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6152                 if (!n_channels) {
6153                         err = -EINVAL;
6154                         goto unlock;
6155                 }
6156         } else {
6157                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6158         }
6159
6160         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6161                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6162                         n_ssids++;
6163
6164         if (n_ssids > wiphy->max_scan_ssids) {
6165                 err = -EINVAL;
6166                 goto unlock;
6167         }
6168
6169         if (info->attrs[NL80211_ATTR_IE])
6170                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6171         else
6172                 ie_len = 0;
6173
6174         if (ie_len > wiphy->max_scan_ie_len) {
6175                 err = -EINVAL;
6176                 goto unlock;
6177         }
6178
6179         request = kzalloc(sizeof(*request)
6180                         + sizeof(*request->ssids) * n_ssids
6181                         + sizeof(*request->channels) * n_channels
6182                         + ie_len, GFP_KERNEL);
6183         if (!request) {
6184                 err = -ENOMEM;
6185                 goto unlock;
6186         }
6187
6188         if (n_ssids)
6189                 request->ssids = (void *)&request->channels[n_channels];
6190         request->n_ssids = n_ssids;
6191         if (ie_len) {
6192                 if (n_ssids)
6193                         request->ie = (void *)(request->ssids + n_ssids);
6194                 else
6195                         request->ie = (void *)(request->channels + n_channels);
6196         }
6197
6198         i = 0;
6199         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6200                 /* user specified, bail out if channel not found */
6201                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6202                         struct ieee80211_channel *chan;
6203
6204                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6205
6206                         if (!chan) {
6207                                 err = -EINVAL;
6208                                 goto out_free;
6209                         }
6210
6211                         /* ignore disabled channels */
6212                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6213                                 continue;
6214
6215                         request->channels[i] = chan;
6216                         i++;
6217                 }
6218         } else {
6219                 enum nl80211_band band;
6220
6221                 /* all channels */
6222                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6223                         int j;
6224
6225                         if (!wiphy->bands[band])
6226                                 continue;
6227                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6228                                 struct ieee80211_channel *chan;
6229
6230                                 chan = &wiphy->bands[band]->channels[j];
6231
6232                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6233                                         continue;
6234
6235                                 request->channels[i] = chan;
6236                                 i++;
6237                         }
6238                 }
6239         }
6240
6241         if (!i) {
6242                 err = -EINVAL;
6243                 goto out_free;
6244         }
6245
6246         request->n_channels = i;
6247
6248         i = 0;
6249         if (n_ssids) {
6250                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6251                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6252                                 err = -EINVAL;
6253                                 goto out_free;
6254                         }
6255                         request->ssids[i].ssid_len = nla_len(attr);
6256                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6257                         i++;
6258                 }
6259         }
6260
6261         if (info->attrs[NL80211_ATTR_IE]) {
6262                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6263                 memcpy((void *)request->ie,
6264                        nla_data(info->attrs[NL80211_ATTR_IE]),
6265                        request->ie_len);
6266         }
6267
6268         for (i = 0; i < NUM_NL80211_BANDS; i++)
6269                 if (wiphy->bands[i])
6270                         request->rates[i] =
6271                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6272
6273         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6274                 nla_for_each_nested(attr,
6275                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6276                                     tmp) {
6277                         enum nl80211_band band = nla_type(attr);
6278
6279                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6280                                 err = -EINVAL;
6281                                 goto out_free;
6282                         }
6283
6284                         if (!wiphy->bands[band])
6285                                 continue;
6286
6287                         err = ieee80211_get_ratemask(wiphy->bands[band],
6288                                                      nla_data(attr),
6289                                                      nla_len(attr),
6290                                                      &request->rates[band]);
6291                         if (err)
6292                                 goto out_free;
6293                 }
6294         }
6295
6296         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6297                 if (!wiphy_ext_feature_isset(wiphy,
6298                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6299                         err = -EOPNOTSUPP;
6300                         goto out_free;
6301                 }
6302
6303                 request->duration =
6304                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6305                 request->duration_mandatory =
6306                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6307         }
6308
6309         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6310                 request->flags = nla_get_u32(
6311                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6312                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6313                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6314                         err = -EOPNOTSUPP;
6315                         goto out_free;
6316                 }
6317
6318                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6319                         if (!(wiphy->features &
6320                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6321                                 err = -EOPNOTSUPP;
6322                                 goto out_free;
6323                         }
6324
6325                         if (wdev->current_bss) {
6326                                 err = -EOPNOTSUPP;
6327                                 goto out_free;
6328                         }
6329
6330                         err = nl80211_parse_random_mac(info->attrs,
6331                                                        request->mac_addr,
6332                                                        request->mac_addr_mask);
6333                         if (err)
6334                                 goto out_free;
6335                 }
6336         }
6337
6338         request->no_cck =
6339                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6340
6341         if (info->attrs[NL80211_ATTR_MAC])
6342                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6343                        ETH_ALEN);
6344         else
6345                 eth_broadcast_addr(request->bssid);
6346
6347         request->wdev = wdev;
6348         request->wiphy = &rdev->wiphy;
6349         request->scan_start = jiffies;
6350
6351         rdev->scan_req = request;
6352         err = rdev_scan(rdev, request);
6353
6354         if (!err) {
6355                 nl80211_send_scan_start(rdev, wdev);
6356                 if (wdev->netdev)
6357                         dev_hold(wdev->netdev);
6358         } else {
6359  out_free:
6360                 rdev->scan_req = NULL;
6361                 kfree(request);
6362         }
6363
6364  unlock:
6365         return err;
6366 }
6367
6368 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6369 {
6370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6371         struct wireless_dev *wdev = info->user_ptr[1];
6372
6373         if (!rdev->ops->abort_scan)
6374                 return -EOPNOTSUPP;
6375
6376         if (rdev->scan_msg)
6377                 return 0;
6378
6379         if (!rdev->scan_req)
6380                 return -ENOENT;
6381
6382         rdev_abort_scan(rdev, wdev);
6383         return 0;
6384 }
6385
6386 static int
6387 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6388                                struct cfg80211_sched_scan_request *request,
6389                                struct nlattr **attrs)
6390 {
6391         int tmp, err, i = 0;
6392         struct nlattr *attr;
6393
6394         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6395                 u32 interval;
6396
6397                 /*
6398                  * If scan plans are not specified,
6399                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6400                  * case one scan plan will be set with the specified scan
6401                  * interval and infinite number of iterations.
6402                  */
6403                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6404                         return -EINVAL;
6405
6406                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6407                 if (!interval)
6408                         return -EINVAL;
6409
6410                 request->scan_plans[0].interval =
6411                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6412                 if (!request->scan_plans[0].interval)
6413                         return -EINVAL;
6414
6415                 if (request->scan_plans[0].interval >
6416                     wiphy->max_sched_scan_plan_interval)
6417                         request->scan_plans[0].interval =
6418                                 wiphy->max_sched_scan_plan_interval;
6419
6420                 return 0;
6421         }
6422
6423         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6424                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6425
6426                 if (WARN_ON(i >= n_plans))
6427                         return -EINVAL;
6428
6429                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6430                                 nla_data(attr), nla_len(attr),
6431                                 nl80211_plan_policy);
6432                 if (err)
6433                         return err;
6434
6435                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6436                         return -EINVAL;
6437
6438                 request->scan_plans[i].interval =
6439                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6440                 if (!request->scan_plans[i].interval ||
6441                     request->scan_plans[i].interval >
6442                     wiphy->max_sched_scan_plan_interval)
6443                         return -EINVAL;
6444
6445                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6446                         request->scan_plans[i].iterations =
6447                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6448                         if (!request->scan_plans[i].iterations ||
6449                             (request->scan_plans[i].iterations >
6450                              wiphy->max_sched_scan_plan_iterations))
6451                                 return -EINVAL;
6452                 } else if (i < n_plans - 1) {
6453                         /*
6454                          * All scan plans but the last one must specify
6455                          * a finite number of iterations
6456                          */
6457                         return -EINVAL;
6458                 }
6459
6460                 i++;
6461         }
6462
6463         /*
6464          * The last scan plan must not specify the number of
6465          * iterations, it is supposed to run infinitely
6466          */
6467         if (request->scan_plans[n_plans - 1].iterations)
6468                 return  -EINVAL;
6469
6470         return 0;
6471 }
6472
6473 static struct cfg80211_sched_scan_request *
6474 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6475                          struct nlattr **attrs)
6476 {
6477         struct cfg80211_sched_scan_request *request;
6478         struct nlattr *attr;
6479         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6480         enum nl80211_band band;
6481         size_t ie_len;
6482         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6483         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6484
6485         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6486                 return ERR_PTR(-EINVAL);
6487
6488         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6489                 n_channels = validate_scan_freqs(
6490                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6491                 if (!n_channels)
6492                         return ERR_PTR(-EINVAL);
6493         } else {
6494                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6495         }
6496
6497         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6498                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6499                                     tmp)
6500                         n_ssids++;
6501
6502         if (n_ssids > wiphy->max_sched_scan_ssids)
6503                 return ERR_PTR(-EINVAL);
6504
6505         /*
6506          * First, count the number of 'real' matchsets. Due to an issue with
6507          * the old implementation, matchsets containing only the RSSI attribute
6508          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6509          * RSSI for all matchsets, rather than their own matchset for reporting
6510          * all APs with a strong RSSI. This is needed to be compatible with
6511          * older userspace that treated a matchset with only the RSSI as the
6512          * global RSSI for all other matchsets - if there are other matchsets.
6513          */
6514         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6515                 nla_for_each_nested(attr,
6516                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6517                                     tmp) {
6518                         struct nlattr *rssi;
6519
6520                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6521                                         nla_data(attr), nla_len(attr),
6522                                         nl80211_match_policy);
6523                         if (err)
6524                                 return ERR_PTR(err);
6525                         /* add other standalone attributes here */
6526                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6527                                 n_match_sets++;
6528                                 continue;
6529                         }
6530                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6531                         if (rssi)
6532                                 default_match_rssi = nla_get_s32(rssi);
6533                 }
6534         }
6535
6536         /* However, if there's no other matchset, add the RSSI one */
6537         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6538                 n_match_sets = 1;
6539
6540         if (n_match_sets > wiphy->max_match_sets)
6541                 return ERR_PTR(-EINVAL);
6542
6543         if (attrs[NL80211_ATTR_IE])
6544                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6545         else
6546                 ie_len = 0;
6547
6548         if (ie_len > wiphy->max_sched_scan_ie_len)
6549                 return ERR_PTR(-EINVAL);
6550
6551         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6552                 /*
6553                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6554                  * each scan plan already specifies its own interval
6555                  */
6556                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6557                         return ERR_PTR(-EINVAL);
6558
6559                 nla_for_each_nested(attr,
6560                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6561                         n_plans++;
6562         } else {
6563                 /*
6564                  * The scan interval attribute is kept for backward
6565                  * compatibility. If no scan plans are specified and sched scan
6566                  * interval is specified, one scan plan will be set with this
6567                  * scan interval and infinite number of iterations.
6568                  */
6569                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6570                         return ERR_PTR(-EINVAL);
6571
6572                 n_plans = 1;
6573         }
6574
6575         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6576                 return ERR_PTR(-EINVAL);
6577
6578         request = kzalloc(sizeof(*request)
6579                         + sizeof(*request->ssids) * n_ssids
6580                         + sizeof(*request->match_sets) * n_match_sets
6581                         + sizeof(*request->scan_plans) * n_plans
6582                         + sizeof(*request->channels) * n_channels
6583                         + ie_len, GFP_KERNEL);
6584         if (!request)
6585                 return ERR_PTR(-ENOMEM);
6586
6587         if (n_ssids)
6588                 request->ssids = (void *)&request->channels[n_channels];
6589         request->n_ssids = n_ssids;
6590         if (ie_len) {
6591                 if (n_ssids)
6592                         request->ie = (void *)(request->ssids + n_ssids);
6593                 else
6594                         request->ie = (void *)(request->channels + n_channels);
6595         }
6596
6597         if (n_match_sets) {
6598                 if (request->ie)
6599                         request->match_sets = (void *)(request->ie + ie_len);
6600                 else if (n_ssids)
6601                         request->match_sets =
6602                                 (void *)(request->ssids + n_ssids);
6603                 else
6604                         request->match_sets =
6605                                 (void *)(request->channels + n_channels);
6606         }
6607         request->n_match_sets = n_match_sets;
6608
6609         if (n_match_sets)
6610                 request->scan_plans = (void *)(request->match_sets +
6611                                                n_match_sets);
6612         else if (request->ie)
6613                 request->scan_plans = (void *)(request->ie + ie_len);
6614         else if (n_ssids)
6615                 request->scan_plans = (void *)(request->ssids + n_ssids);
6616         else
6617                 request->scan_plans = (void *)(request->channels + n_channels);
6618
6619         request->n_scan_plans = n_plans;
6620
6621         i = 0;
6622         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6623                 /* user specified, bail out if channel not found */
6624                 nla_for_each_nested(attr,
6625                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6626                                     tmp) {
6627                         struct ieee80211_channel *chan;
6628
6629                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6630
6631                         if (!chan) {
6632                                 err = -EINVAL;
6633                                 goto out_free;
6634                         }
6635
6636                         /* ignore disabled channels */
6637                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6638                                 continue;
6639
6640                         request->channels[i] = chan;
6641                         i++;
6642                 }
6643         } else {
6644                 /* all channels */
6645                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6646                         int j;
6647
6648                         if (!wiphy->bands[band])
6649                                 continue;
6650                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6651                                 struct ieee80211_channel *chan;
6652
6653                                 chan = &wiphy->bands[band]->channels[j];
6654
6655                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6656                                         continue;
6657
6658                                 request->channels[i] = chan;
6659                                 i++;
6660                         }
6661                 }
6662         }
6663
6664         if (!i) {
6665                 err = -EINVAL;
6666                 goto out_free;
6667         }
6668
6669         request->n_channels = i;
6670
6671         i = 0;
6672         if (n_ssids) {
6673                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6674                                     tmp) {
6675                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6676                                 err = -EINVAL;
6677                                 goto out_free;
6678                         }
6679                         request->ssids[i].ssid_len = nla_len(attr);
6680                         memcpy(request->ssids[i].ssid, nla_data(attr),
6681                                nla_len(attr));
6682                         i++;
6683                 }
6684         }
6685
6686         i = 0;
6687         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6688                 nla_for_each_nested(attr,
6689                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6690                                     tmp) {
6691                         struct nlattr *ssid, *rssi;
6692
6693                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6694                                         nla_data(attr), nla_len(attr),
6695                                         nl80211_match_policy);
6696                         if (err)
6697                                 goto out_free;
6698                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6699                         if (ssid) {
6700                                 if (WARN_ON(i >= n_match_sets)) {
6701                                         /* this indicates a programming error,
6702                                          * the loop above should have verified
6703                                          * things properly
6704                                          */
6705                                         err = -EINVAL;
6706                                         goto out_free;
6707                                 }
6708
6709                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6710                                         err = -EINVAL;
6711                                         goto out_free;
6712                                 }
6713                                 memcpy(request->match_sets[i].ssid.ssid,
6714                                        nla_data(ssid), nla_len(ssid));
6715                                 request->match_sets[i].ssid.ssid_len =
6716                                         nla_len(ssid);
6717                                 /* special attribute - old implementation w/a */
6718                                 request->match_sets[i].rssi_thold =
6719                                         default_match_rssi;
6720                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6721                                 if (rssi)
6722                                         request->match_sets[i].rssi_thold =
6723                                                 nla_get_s32(rssi);
6724                         }
6725                         i++;
6726                 }
6727
6728                 /* there was no other matchset, so the RSSI one is alone */
6729                 if (i == 0 && n_match_sets)
6730                         request->match_sets[0].rssi_thold = default_match_rssi;
6731
6732                 request->min_rssi_thold = INT_MAX;
6733                 for (i = 0; i < n_match_sets; i++)
6734                         request->min_rssi_thold =
6735                                 min(request->match_sets[i].rssi_thold,
6736                                     request->min_rssi_thold);
6737         } else {
6738                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6739         }
6740
6741         if (ie_len) {
6742                 request->ie_len = ie_len;
6743                 memcpy((void *)request->ie,
6744                        nla_data(attrs[NL80211_ATTR_IE]),
6745                        request->ie_len);
6746         }
6747
6748         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6749                 request->flags = nla_get_u32(
6750                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6751                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6752                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6753                         err = -EOPNOTSUPP;
6754                         goto out_free;
6755                 }
6756
6757                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6758                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6759
6760                         if (!wdev) /* must be net-detect */
6761                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6762
6763                         if (!(wiphy->features & flg)) {
6764                                 err = -EOPNOTSUPP;
6765                                 goto out_free;
6766                         }
6767
6768                         if (wdev && wdev->current_bss) {
6769                                 err = -EOPNOTSUPP;
6770                                 goto out_free;
6771                         }
6772
6773                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6774                                                        request->mac_addr_mask);
6775                         if (err)
6776                                 goto out_free;
6777                 }
6778         }
6779
6780         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6781                 request->delay =
6782                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6783
6784         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6785         if (err)
6786                 goto out_free;
6787
6788         request->scan_start = jiffies;
6789
6790         return request;
6791
6792 out_free:
6793         kfree(request);
6794         return ERR_PTR(err);
6795 }
6796
6797 static int nl80211_start_sched_scan(struct sk_buff *skb,
6798                                     struct genl_info *info)
6799 {
6800         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6801         struct net_device *dev = info->user_ptr[1];
6802         struct wireless_dev *wdev = dev->ieee80211_ptr;
6803         struct cfg80211_sched_scan_request *sched_scan_req;
6804         int err;
6805
6806         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6807             !rdev->ops->sched_scan_start)
6808                 return -EOPNOTSUPP;
6809
6810         if (rdev->sched_scan_req)
6811                 return -EINPROGRESS;
6812
6813         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6814                                                   info->attrs);
6815
6816         err = PTR_ERR_OR_ZERO(sched_scan_req);
6817         if (err)
6818                 goto out_err;
6819
6820         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6821         if (err)
6822                 goto out_free;
6823
6824         sched_scan_req->dev = dev;
6825         sched_scan_req->wiphy = &rdev->wiphy;
6826
6827         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6828                 sched_scan_req->owner_nlportid = info->snd_portid;
6829
6830         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6831
6832         nl80211_send_sched_scan(rdev, dev,
6833                                 NL80211_CMD_START_SCHED_SCAN);
6834         return 0;
6835
6836 out_free:
6837         kfree(sched_scan_req);
6838 out_err:
6839         return err;
6840 }
6841
6842 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6843                                    struct genl_info *info)
6844 {
6845         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6846
6847         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6848             !rdev->ops->sched_scan_stop)
6849                 return -EOPNOTSUPP;
6850
6851         return __cfg80211_stop_sched_scan(rdev, false);
6852 }
6853
6854 static int nl80211_start_radar_detection(struct sk_buff *skb,
6855                                          struct genl_info *info)
6856 {
6857         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6858         struct net_device *dev = info->user_ptr[1];
6859         struct wireless_dev *wdev = dev->ieee80211_ptr;
6860         struct cfg80211_chan_def chandef;
6861         enum nl80211_dfs_regions dfs_region;
6862         unsigned int cac_time_ms;
6863         int err;
6864
6865         dfs_region = reg_get_dfs_region(wdev->wiphy);
6866         if (dfs_region == NL80211_DFS_UNSET)
6867                 return -EINVAL;
6868
6869         err = nl80211_parse_chandef(rdev, info, &chandef);
6870         if (err)
6871                 return err;
6872
6873         if (netif_carrier_ok(dev))
6874                 return -EBUSY;
6875
6876         if (wdev->cac_started)
6877                 return -EBUSY;
6878
6879         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6880                                             wdev->iftype);
6881         if (err < 0)
6882                 return err;
6883
6884         if (err == 0)
6885                 return -EINVAL;
6886
6887         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6888                 return -EINVAL;
6889
6890         if (!rdev->ops->start_radar_detection)
6891                 return -EOPNOTSUPP;
6892
6893         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6894         if (WARN_ON(!cac_time_ms))
6895                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6896
6897         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
6898         if (!err) {
6899                 wdev->chandef = chandef;
6900                 wdev->cac_started = true;
6901                 wdev->cac_start_time = jiffies;
6902                 wdev->cac_time_ms = cac_time_ms;
6903         }
6904         return err;
6905 }
6906
6907 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6908 {
6909         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6910         struct net_device *dev = info->user_ptr[1];
6911         struct wireless_dev *wdev = dev->ieee80211_ptr;
6912         struct cfg80211_csa_settings params;
6913         /* csa_attrs is defined static to avoid waste of stack size - this
6914          * function is called under RTNL lock, so this should not be a problem.
6915          */
6916         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6917         int err;
6918         bool need_new_beacon = false;
6919         int len, i;
6920         u32 cs_count;
6921
6922         if (!rdev->ops->channel_switch ||
6923             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6924                 return -EOPNOTSUPP;
6925
6926         switch (dev->ieee80211_ptr->iftype) {
6927         case NL80211_IFTYPE_AP:
6928         case NL80211_IFTYPE_P2P_GO:
6929                 need_new_beacon = true;
6930
6931                 /* useless if AP is not running */
6932                 if (!wdev->beacon_interval)
6933                         return -ENOTCONN;
6934                 break;
6935         case NL80211_IFTYPE_ADHOC:
6936                 if (!wdev->ssid_len)
6937                         return -ENOTCONN;
6938                 break;
6939         case NL80211_IFTYPE_MESH_POINT:
6940                 if (!wdev->mesh_id_len)
6941                         return -ENOTCONN;
6942                 break;
6943         default:
6944                 return -EOPNOTSUPP;
6945         }
6946
6947         memset(&params, 0, sizeof(params));
6948
6949         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6950             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6951                 return -EINVAL;
6952
6953         /* only important for AP, IBSS and mesh create IEs internally */
6954         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6955                 return -EINVAL;
6956
6957         /* Even though the attribute is u32, the specification says
6958          * u8, so let's make sure we don't overflow.
6959          */
6960         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6961         if (cs_count > 255)
6962                 return -EINVAL;
6963
6964         params.count = cs_count;
6965
6966         if (!need_new_beacon)
6967                 goto skip_beacons;
6968
6969         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6970         if (err)
6971                 return err;
6972
6973         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6974                                info->attrs[NL80211_ATTR_CSA_IES],
6975                                nl80211_policy);
6976         if (err)
6977                 return err;
6978
6979         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6980         if (err)
6981                 return err;
6982
6983         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6984                 return -EINVAL;
6985
6986         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6987         if (!len || (len % sizeof(u16)))
6988                 return -EINVAL;
6989
6990         params.n_counter_offsets_beacon = len / sizeof(u16);
6991         if (rdev->wiphy.max_num_csa_counters &&
6992             (params.n_counter_offsets_beacon >
6993              rdev->wiphy.max_num_csa_counters))
6994                 return -EINVAL;
6995
6996         params.counter_offsets_beacon =
6997                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6998
6999         /* sanity checks - counters should fit and be the same */
7000         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
7001                 u16 offset = params.counter_offsets_beacon[i];
7002
7003                 if (offset >= params.beacon_csa.tail_len)
7004                         return -EINVAL;
7005
7006                 if (params.beacon_csa.tail[offset] != params.count)
7007                         return -EINVAL;
7008         }
7009
7010         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
7011                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7012                 if (!len || (len % sizeof(u16)))
7013                         return -EINVAL;
7014
7015                 params.n_counter_offsets_presp = len / sizeof(u16);
7016                 if (rdev->wiphy.max_num_csa_counters &&
7017                     (params.n_counter_offsets_presp >
7018                      rdev->wiphy.max_num_csa_counters))
7019                         return -EINVAL;
7020
7021                 params.counter_offsets_presp =
7022                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7023
7024                 /* sanity checks - counters should fit and be the same */
7025                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
7026                         u16 offset = params.counter_offsets_presp[i];
7027
7028                         if (offset >= params.beacon_csa.probe_resp_len)
7029                                 return -EINVAL;
7030
7031                         if (params.beacon_csa.probe_resp[offset] !=
7032                             params.count)
7033                                 return -EINVAL;
7034                 }
7035         }
7036
7037 skip_beacons:
7038         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7039         if (err)
7040                 return err;
7041
7042         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7043                                            wdev->iftype))
7044                 return -EINVAL;
7045
7046         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7047                                             &params.chandef,
7048                                             wdev->iftype);
7049         if (err < 0)
7050                 return err;
7051
7052         if (err > 0)
7053                 params.radar_required = true;
7054
7055         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7056                 params.block_tx = true;
7057
7058         wdev_lock(wdev);
7059         err = rdev_channel_switch(rdev, dev, &params);
7060         wdev_unlock(wdev);
7061
7062         return err;
7063 }
7064
7065 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7066                             u32 seq, int flags,
7067                             struct cfg80211_registered_device *rdev,
7068                             struct wireless_dev *wdev,
7069                             struct cfg80211_internal_bss *intbss)
7070 {
7071         struct cfg80211_bss *res = &intbss->pub;
7072         const struct cfg80211_bss_ies *ies;
7073         void *hdr;
7074         struct nlattr *bss;
7075
7076         ASSERT_WDEV_LOCK(wdev);
7077
7078         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7079                              NL80211_CMD_NEW_SCAN_RESULTS);
7080         if (!hdr)
7081                 return -1;
7082
7083         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7084
7085         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7086                 goto nla_put_failure;
7087         if (wdev->netdev &&
7088             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7089                 goto nla_put_failure;
7090         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7091                               NL80211_ATTR_PAD))
7092                 goto nla_put_failure;
7093
7094         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7095         if (!bss)
7096                 goto nla_put_failure;
7097         if ((!is_zero_ether_addr(res->bssid) &&
7098              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7099                 goto nla_put_failure;
7100
7101         rcu_read_lock();
7102         /* indicate whether we have probe response data or not */
7103         if (rcu_access_pointer(res->proberesp_ies) &&
7104             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7105                 goto fail_unlock_rcu;
7106
7107         /* this pointer prefers to be pointed to probe response data
7108          * but is always valid
7109          */
7110         ies = rcu_dereference(res->ies);
7111         if (ies) {
7112                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7113                                       NL80211_BSS_PAD))
7114                         goto fail_unlock_rcu;
7115                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7116                                         ies->len, ies->data))
7117                         goto fail_unlock_rcu;
7118         }
7119
7120         /* and this pointer is always (unless driver didn't know) beacon data */
7121         ies = rcu_dereference(res->beacon_ies);
7122         if (ies && ies->from_beacon) {
7123                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7124                                       NL80211_BSS_PAD))
7125                         goto fail_unlock_rcu;
7126                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7127                                         ies->len, ies->data))
7128                         goto fail_unlock_rcu;
7129         }
7130         rcu_read_unlock();
7131
7132         if (res->beacon_interval &&
7133             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7134                 goto nla_put_failure;
7135         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7136             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7137             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7138             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7139                         jiffies_to_msecs(jiffies - intbss->ts)))
7140                 goto nla_put_failure;
7141
7142         if (intbss->parent_tsf &&
7143             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7144                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7145              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7146                      intbss->parent_bssid)))
7147                 goto nla_put_failure;
7148
7149         if (intbss->ts_boottime &&
7150             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7151                               intbss->ts_boottime, NL80211_BSS_PAD))
7152                 goto nla_put_failure;
7153
7154         switch (rdev->wiphy.signal_type) {
7155         case CFG80211_SIGNAL_TYPE_MBM:
7156                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7157                         goto nla_put_failure;
7158                 break;
7159         case CFG80211_SIGNAL_TYPE_UNSPEC:
7160                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7161                         goto nla_put_failure;
7162                 break;
7163         default:
7164                 break;
7165         }
7166
7167         switch (wdev->iftype) {
7168         case NL80211_IFTYPE_P2P_CLIENT:
7169         case NL80211_IFTYPE_STATION:
7170                 if (intbss == wdev->current_bss &&
7171                     nla_put_u32(msg, NL80211_BSS_STATUS,
7172                                 NL80211_BSS_STATUS_ASSOCIATED))
7173                         goto nla_put_failure;
7174                 break;
7175         case NL80211_IFTYPE_ADHOC:
7176                 if (intbss == wdev->current_bss &&
7177                     nla_put_u32(msg, NL80211_BSS_STATUS,
7178                                 NL80211_BSS_STATUS_IBSS_JOINED))
7179                         goto nla_put_failure;
7180                 break;
7181         default:
7182                 break;
7183         }
7184
7185         nla_nest_end(msg, bss);
7186
7187         genlmsg_end(msg, hdr);
7188         return 0;
7189
7190  fail_unlock_rcu:
7191         rcu_read_unlock();
7192  nla_put_failure:
7193         genlmsg_cancel(msg, hdr);
7194         return -EMSGSIZE;
7195 }
7196
7197 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7198 {
7199         struct cfg80211_registered_device *rdev;
7200         struct cfg80211_internal_bss *scan;
7201         struct wireless_dev *wdev;
7202         int start = cb->args[2], idx = 0;
7203         int err;
7204
7205         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7206         if (err)
7207                 return err;
7208
7209         wdev_lock(wdev);
7210         spin_lock_bh(&rdev->bss_lock);
7211         cfg80211_bss_expire(rdev);
7212
7213         cb->seq = rdev->bss_generation;
7214
7215         list_for_each_entry(scan, &rdev->bss_list, list) {
7216                 if (++idx <= start)
7217                         continue;
7218                 if (nl80211_send_bss(skb, cb,
7219                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7220                                 rdev, wdev, scan) < 0) {
7221                         idx--;
7222                         break;
7223                 }
7224         }
7225
7226         spin_unlock_bh(&rdev->bss_lock);
7227         wdev_unlock(wdev);
7228
7229         cb->args[2] = idx;
7230         nl80211_finish_wdev_dump(rdev);
7231
7232         return skb->len;
7233 }
7234
7235 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7236                                int flags, struct net_device *dev,
7237                                bool allow_radio_stats,
7238                                struct survey_info *survey)
7239 {
7240         void *hdr;
7241         struct nlattr *infoattr;
7242
7243         /* skip radio stats if userspace didn't request them */
7244         if (!survey->channel && !allow_radio_stats)
7245                 return 0;
7246
7247         hdr = nl80211hdr_put(msg, portid, seq, flags,
7248                              NL80211_CMD_NEW_SURVEY_RESULTS);
7249         if (!hdr)
7250                 return -ENOMEM;
7251
7252         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7253                 goto nla_put_failure;
7254
7255         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7256         if (!infoattr)
7257                 goto nla_put_failure;
7258
7259         if (survey->channel &&
7260             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7261                         survey->channel->center_freq))
7262                 goto nla_put_failure;
7263
7264         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7265             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7266                 goto nla_put_failure;
7267         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7268             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7269                 goto nla_put_failure;
7270         if ((survey->filled & SURVEY_INFO_TIME) &&
7271             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7272                         survey->time, NL80211_SURVEY_INFO_PAD))
7273                 goto nla_put_failure;
7274         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7275             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7276                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7277                 goto nla_put_failure;
7278         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7279             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7280                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7281                 goto nla_put_failure;
7282         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7283             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7284                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7285                 goto nla_put_failure;
7286         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7287             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7288                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7289                 goto nla_put_failure;
7290         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7291             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7292                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7293                 goto nla_put_failure;
7294
7295         nla_nest_end(msg, infoattr);
7296
7297         genlmsg_end(msg, hdr);
7298         return 0;
7299
7300  nla_put_failure:
7301         genlmsg_cancel(msg, hdr);
7302         return -EMSGSIZE;
7303 }
7304
7305 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7306 {
7307         struct survey_info survey;
7308         struct cfg80211_registered_device *rdev;
7309         struct wireless_dev *wdev;
7310         int survey_idx = cb->args[2];
7311         int res;
7312         bool radio_stats;
7313
7314         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7315         if (res)
7316                 return res;
7317
7318         /* prepare_wdev_dump parsed the attributes */
7319         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7320
7321         if (!wdev->netdev) {
7322                 res = -EINVAL;
7323                 goto out_err;
7324         }
7325
7326         if (!rdev->ops->dump_survey) {
7327                 res = -EOPNOTSUPP;
7328                 goto out_err;
7329         }
7330
7331         while (1) {
7332                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7333                 if (res == -ENOENT)
7334                         break;
7335                 if (res)
7336                         goto out_err;
7337
7338                 /* don't send disabled channels, but do send non-channel data */
7339                 if (survey.channel &&
7340                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7341                         survey_idx++;
7342                         continue;
7343                 }
7344
7345                 if (nl80211_send_survey(skb,
7346                                 NETLINK_CB(cb->skb).portid,
7347                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7348                                 wdev->netdev, radio_stats, &survey) < 0)
7349                         goto out;
7350                 survey_idx++;
7351         }
7352
7353  out:
7354         cb->args[2] = survey_idx;
7355         res = skb->len;
7356  out_err:
7357         nl80211_finish_wdev_dump(rdev);
7358         return res;
7359 }
7360
7361 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7362 {
7363         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7364                                   NL80211_WPA_VERSION_2));
7365 }
7366
7367 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7368 {
7369         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7370         struct net_device *dev = info->user_ptr[1];
7371         struct ieee80211_channel *chan;
7372         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7373         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7374         enum nl80211_auth_type auth_type;
7375         struct key_parse key;
7376         bool local_state_change;
7377
7378         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7379                 return -EINVAL;
7380
7381         if (!info->attrs[NL80211_ATTR_MAC])
7382                 return -EINVAL;
7383
7384         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7385                 return -EINVAL;
7386
7387         if (!info->attrs[NL80211_ATTR_SSID])
7388                 return -EINVAL;
7389
7390         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7391                 return -EINVAL;
7392
7393         err = nl80211_parse_key(info, &key);
7394         if (err)
7395                 return err;
7396
7397         if (key.idx >= 0) {
7398                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7399                         return -EINVAL;
7400                 if (!key.p.key || !key.p.key_len)
7401                         return -EINVAL;
7402                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7403                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7404                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7405                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7406                         return -EINVAL;
7407                 if (key.idx > 3)
7408                         return -EINVAL;
7409         } else {
7410                 key.p.key_len = 0;
7411                 key.p.key = NULL;
7412         }
7413
7414         if (key.idx >= 0) {
7415                 int i;
7416                 bool ok = false;
7417
7418                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7419                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7420                                 ok = true;
7421                                 break;
7422                         }
7423                 }
7424                 if (!ok)
7425                         return -EINVAL;
7426         }
7427
7428         if (!rdev->ops->auth)
7429                 return -EOPNOTSUPP;
7430
7431         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7432             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7433                 return -EOPNOTSUPP;
7434
7435         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7436         chan = nl80211_get_valid_chan(&rdev->wiphy,
7437                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7438         if (!chan)
7439                 return -EINVAL;
7440
7441         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7442         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7443
7444         if (info->attrs[NL80211_ATTR_IE]) {
7445                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7446                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7447         }
7448
7449         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7450         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7451                 return -EINVAL;
7452
7453         if (auth_type == NL80211_AUTHTYPE_SAE &&
7454             !info->attrs[NL80211_ATTR_SAE_DATA])
7455                 return -EINVAL;
7456
7457         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7458                 if (auth_type != NL80211_AUTHTYPE_SAE)
7459                         return -EINVAL;
7460                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7461                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7462                 /* need to include at least Auth Transaction and Status Code */
7463                 if (sae_data_len < 4)
7464                         return -EINVAL;
7465         }
7466
7467         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7468
7469         /*
7470          * Since we no longer track auth state, ignore
7471          * requests to only change local state.
7472          */
7473         if (local_state_change)
7474                 return 0;
7475
7476         wdev_lock(dev->ieee80211_ptr);
7477         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7478                                  ssid, ssid_len, ie, ie_len,
7479                                  key.p.key, key.p.key_len, key.idx,
7480                                  sae_data, sae_data_len);
7481         wdev_unlock(dev->ieee80211_ptr);
7482         return err;
7483 }
7484
7485 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7486                                    struct genl_info *info,
7487                                    struct cfg80211_crypto_settings *settings,
7488                                    int cipher_limit)
7489 {
7490         memset(settings, 0, sizeof(*settings));
7491
7492         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7493
7494         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7495                 u16 proto;
7496
7497                 proto = nla_get_u16(
7498                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7499                 settings->control_port_ethertype = cpu_to_be16(proto);
7500                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7501                     proto != ETH_P_PAE)
7502                         return -EINVAL;
7503                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7504                         settings->control_port_no_encrypt = true;
7505         } else
7506                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7507
7508         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7509                 void *data;
7510                 int len, i;
7511
7512                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7513                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7514                 settings->n_ciphers_pairwise = len / sizeof(u32);
7515
7516                 if (len % sizeof(u32))
7517                         return -EINVAL;
7518
7519                 if (settings->n_ciphers_pairwise > cipher_limit)
7520                         return -EINVAL;
7521
7522                 memcpy(settings->ciphers_pairwise, data, len);
7523
7524                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7525                         if (!cfg80211_supported_cipher_suite(
7526                                         &rdev->wiphy,
7527                                         settings->ciphers_pairwise[i]))
7528                                 return -EINVAL;
7529         }
7530
7531         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7532                 settings->cipher_group =
7533                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7534                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7535                                                      settings->cipher_group))
7536                         return -EINVAL;
7537         }
7538
7539         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7540                 settings->wpa_versions =
7541                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7542                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7543                         return -EINVAL;
7544         }
7545
7546         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7547                 void *data;
7548                 int len;
7549
7550                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7551                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7552                 settings->n_akm_suites = len / sizeof(u32);
7553
7554                 if (len % sizeof(u32))
7555                         return -EINVAL;
7556
7557                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7558                         return -EINVAL;
7559
7560                 memcpy(settings->akm_suites, data, len);
7561         }
7562
7563         return 0;
7564 }
7565
7566 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7567 {
7568         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7569         struct net_device *dev = info->user_ptr[1];
7570         struct ieee80211_channel *chan;
7571         struct cfg80211_assoc_request req = {};
7572         const u8 *bssid, *ssid;
7573         int err, ssid_len = 0;
7574
7575         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7576                 return -EINVAL;
7577
7578         if (!info->attrs[NL80211_ATTR_MAC] ||
7579             !info->attrs[NL80211_ATTR_SSID] ||
7580             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7581                 return -EINVAL;
7582
7583         if (!rdev->ops->assoc)
7584                 return -EOPNOTSUPP;
7585
7586         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7587             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7588                 return -EOPNOTSUPP;
7589
7590         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7591
7592         chan = nl80211_get_valid_chan(&rdev->wiphy,
7593                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7594         if (!chan)
7595                 return -EINVAL;
7596
7597         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7598         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7599
7600         if (info->attrs[NL80211_ATTR_IE]) {
7601                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7602                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7603         }
7604
7605         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7606                 enum nl80211_mfp mfp =
7607                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7608                 if (mfp == NL80211_MFP_REQUIRED)
7609                         req.use_mfp = true;
7610                 else if (mfp != NL80211_MFP_NO)
7611                         return -EINVAL;
7612         }
7613
7614         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7615                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7616
7617         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7618                 req.flags |= ASSOC_REQ_DISABLE_HT;
7619
7620         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7621                 memcpy(&req.ht_capa_mask,
7622                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7623                        sizeof(req.ht_capa_mask));
7624
7625         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7626                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7627                         return -EINVAL;
7628                 memcpy(&req.ht_capa,
7629                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7630                        sizeof(req.ht_capa));
7631         }
7632
7633         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7634                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7635
7636         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7637                 memcpy(&req.vht_capa_mask,
7638                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7639                        sizeof(req.vht_capa_mask));
7640
7641         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7642                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7643                         return -EINVAL;
7644                 memcpy(&req.vht_capa,
7645                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7646                        sizeof(req.vht_capa));
7647         }
7648
7649         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7650                 if (!((rdev->wiphy.features &
7651                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
7652                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
7653                     !wiphy_ext_feature_isset(&rdev->wiphy,
7654                                              NL80211_EXT_FEATURE_RRM))
7655                         return -EINVAL;
7656                 req.flags |= ASSOC_REQ_USE_RRM;
7657         }
7658
7659         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7660         if (!err) {
7661                 wdev_lock(dev->ieee80211_ptr);
7662                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7663                                           ssid, ssid_len, &req);
7664                 wdev_unlock(dev->ieee80211_ptr);
7665         }
7666
7667         return err;
7668 }
7669
7670 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7671 {
7672         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7673         struct net_device *dev = info->user_ptr[1];
7674         const u8 *ie = NULL, *bssid;
7675         int ie_len = 0, err;
7676         u16 reason_code;
7677         bool local_state_change;
7678
7679         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7680                 return -EINVAL;
7681
7682         if (!info->attrs[NL80211_ATTR_MAC])
7683                 return -EINVAL;
7684
7685         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7686                 return -EINVAL;
7687
7688         if (!rdev->ops->deauth)
7689                 return -EOPNOTSUPP;
7690
7691         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7692             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7693                 return -EOPNOTSUPP;
7694
7695         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7696
7697         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7698         if (reason_code == 0) {
7699                 /* Reason Code 0 is reserved */
7700                 return -EINVAL;
7701         }
7702
7703         if (info->attrs[NL80211_ATTR_IE]) {
7704                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7705                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7706         }
7707
7708         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7709
7710         wdev_lock(dev->ieee80211_ptr);
7711         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7712                                    local_state_change);
7713         wdev_unlock(dev->ieee80211_ptr);
7714         return err;
7715 }
7716
7717 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7718 {
7719         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7720         struct net_device *dev = info->user_ptr[1];
7721         const u8 *ie = NULL, *bssid;
7722         int ie_len = 0, err;
7723         u16 reason_code;
7724         bool local_state_change;
7725
7726         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7727                 return -EINVAL;
7728
7729         if (!info->attrs[NL80211_ATTR_MAC])
7730                 return -EINVAL;
7731
7732         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7733                 return -EINVAL;
7734
7735         if (!rdev->ops->disassoc)
7736                 return -EOPNOTSUPP;
7737
7738         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7739             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7740                 return -EOPNOTSUPP;
7741
7742         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7743
7744         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7745         if (reason_code == 0) {
7746                 /* Reason Code 0 is reserved */
7747                 return -EINVAL;
7748         }
7749
7750         if (info->attrs[NL80211_ATTR_IE]) {
7751                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7752                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7753         }
7754
7755         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7756
7757         wdev_lock(dev->ieee80211_ptr);
7758         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7759                                      local_state_change);
7760         wdev_unlock(dev->ieee80211_ptr);
7761         return err;
7762 }
7763
7764 static bool
7765 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7766                          int mcast_rate[NUM_NL80211_BANDS],
7767                          int rateval)
7768 {
7769         struct wiphy *wiphy = &rdev->wiphy;
7770         bool found = false;
7771         int band, i;
7772
7773         for (band = 0; band < NUM_NL80211_BANDS; band++) {
7774                 struct ieee80211_supported_band *sband;
7775
7776                 sband = wiphy->bands[band];
7777                 if (!sband)
7778                         continue;
7779
7780                 for (i = 0; i < sband->n_bitrates; i++) {
7781                         if (sband->bitrates[i].bitrate == rateval) {
7782                                 mcast_rate[band] = i + 1;
7783                                 found = true;
7784                                 break;
7785                         }
7786                 }
7787         }
7788
7789         return found;
7790 }
7791
7792 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7793 {
7794         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7795         struct net_device *dev = info->user_ptr[1];
7796         struct cfg80211_ibss_params ibss;
7797         struct wiphy *wiphy;
7798         struct cfg80211_cached_keys *connkeys = NULL;
7799         int err;
7800
7801         memset(&ibss, 0, sizeof(ibss));
7802
7803         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7804                 return -EINVAL;
7805
7806         if (!info->attrs[NL80211_ATTR_SSID] ||
7807             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7808                 return -EINVAL;
7809
7810         ibss.beacon_interval = 100;
7811
7812         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
7813                 ibss.beacon_interval =
7814                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7815
7816         err = cfg80211_validate_beacon_int(rdev, ibss.beacon_interval);
7817         if (err)
7818                 return err;
7819
7820         if (!rdev->ops->join_ibss)
7821                 return -EOPNOTSUPP;
7822
7823         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7824                 return -EOPNOTSUPP;
7825
7826         wiphy = &rdev->wiphy;
7827
7828         if (info->attrs[NL80211_ATTR_MAC]) {
7829                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7830
7831                 if (!is_valid_ether_addr(ibss.bssid))
7832                         return -EINVAL;
7833         }
7834         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7835         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7836
7837         if (info->attrs[NL80211_ATTR_IE]) {
7838                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7839                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7840         }
7841
7842         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7843         if (err)
7844                 return err;
7845
7846         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7847                                      NL80211_IFTYPE_ADHOC))
7848                 return -EINVAL;
7849
7850         switch (ibss.chandef.width) {
7851         case NL80211_CHAN_WIDTH_5:
7852         case NL80211_CHAN_WIDTH_10:
7853         case NL80211_CHAN_WIDTH_20_NOHT:
7854                 break;
7855         case NL80211_CHAN_WIDTH_20:
7856         case NL80211_CHAN_WIDTH_40:
7857                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7858                         return -EINVAL;
7859                 break;
7860         case NL80211_CHAN_WIDTH_80:
7861         case NL80211_CHAN_WIDTH_80P80:
7862         case NL80211_CHAN_WIDTH_160:
7863                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7864                         return -EINVAL;
7865                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7866                                              NL80211_EXT_FEATURE_VHT_IBSS))
7867                         return -EINVAL;
7868                 break;
7869         default:
7870                 return -EINVAL;
7871         }
7872
7873         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7874         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7875
7876         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7877                 u8 *rates =
7878                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7879                 int n_rates =
7880                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7881                 struct ieee80211_supported_band *sband =
7882                         wiphy->bands[ibss.chandef.chan->band];
7883
7884                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7885                                              &ibss.basic_rates);
7886                 if (err)
7887                         return err;
7888         }
7889
7890         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7891                 memcpy(&ibss.ht_capa_mask,
7892                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7893                        sizeof(ibss.ht_capa_mask));
7894
7895         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7896                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7897                         return -EINVAL;
7898                 memcpy(&ibss.ht_capa,
7899                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7900                        sizeof(ibss.ht_capa));
7901         }
7902
7903         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7904             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7905                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7906                 return -EINVAL;
7907
7908         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7909                 bool no_ht = false;
7910
7911                 connkeys = nl80211_parse_connkeys(rdev,
7912                                           info->attrs[NL80211_ATTR_KEYS],
7913                                           &no_ht);
7914                 if (IS_ERR(connkeys))
7915                         return PTR_ERR(connkeys);
7916
7917                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7918                     no_ht) {
7919                         kzfree(connkeys);
7920                         return -EINVAL;
7921                 }
7922         }
7923
7924         ibss.control_port =
7925                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7926
7927         ibss.userspace_handles_dfs =
7928                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7929
7930         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7931         if (err)
7932                 kzfree(connkeys);
7933         return err;
7934 }
7935
7936 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7937 {
7938         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7939         struct net_device *dev = info->user_ptr[1];
7940
7941         if (!rdev->ops->leave_ibss)
7942                 return -EOPNOTSUPP;
7943
7944         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7945                 return -EOPNOTSUPP;
7946
7947         return cfg80211_leave_ibss(rdev, dev, false);
7948 }
7949
7950 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7951 {
7952         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7953         struct net_device *dev = info->user_ptr[1];
7954         int mcast_rate[NUM_NL80211_BANDS];
7955         u32 nla_rate;
7956         int err;
7957
7958         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7959             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7960             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7961                 return -EOPNOTSUPP;
7962
7963         if (!rdev->ops->set_mcast_rate)
7964                 return -EOPNOTSUPP;
7965
7966         memset(mcast_rate, 0, sizeof(mcast_rate));
7967
7968         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7969                 return -EINVAL;
7970
7971         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7972         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7973                 return -EINVAL;
7974
7975         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
7976
7977         return err;
7978 }
7979
7980 static struct sk_buff *
7981 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7982                             struct wireless_dev *wdev, int approxlen,
7983                             u32 portid, u32 seq, enum nl80211_commands cmd,
7984                             enum nl80211_attrs attr,
7985                             const struct nl80211_vendor_cmd_info *info,
7986                             gfp_t gfp)
7987 {
7988         struct sk_buff *skb;
7989         void *hdr;
7990         struct nlattr *data;
7991
7992         skb = nlmsg_new(approxlen + 100, gfp);
7993         if (!skb)
7994                 return NULL;
7995
7996         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7997         if (!hdr) {
7998                 kfree_skb(skb);
7999                 return NULL;
8000         }
8001
8002         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
8003                 goto nla_put_failure;
8004
8005         if (info) {
8006                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
8007                                 info->vendor_id))
8008                         goto nla_put_failure;
8009                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
8010                                 info->subcmd))
8011                         goto nla_put_failure;
8012         }
8013
8014         if (wdev) {
8015                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
8016                                       wdev_id(wdev), NL80211_ATTR_PAD))
8017                         goto nla_put_failure;
8018                 if (wdev->netdev &&
8019                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
8020                                 wdev->netdev->ifindex))
8021                         goto nla_put_failure;
8022         }
8023
8024         data = nla_nest_start(skb, attr);
8025         if (!data)
8026                 goto nla_put_failure;
8027
8028         ((void **)skb->cb)[0] = rdev;
8029         ((void **)skb->cb)[1] = hdr;
8030         ((void **)skb->cb)[2] = data;
8031
8032         return skb;
8033
8034  nla_put_failure:
8035         kfree_skb(skb);
8036         return NULL;
8037 }
8038
8039 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8040                                            struct wireless_dev *wdev,
8041                                            enum nl80211_commands cmd,
8042                                            enum nl80211_attrs attr,
8043                                            int vendor_event_idx,
8044                                            int approxlen, gfp_t gfp)
8045 {
8046         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8047         const struct nl80211_vendor_cmd_info *info;
8048
8049         switch (cmd) {
8050         case NL80211_CMD_TESTMODE:
8051                 if (WARN_ON(vendor_event_idx != -1))
8052                         return NULL;
8053                 info = NULL;
8054                 break;
8055         case NL80211_CMD_VENDOR:
8056                 if (WARN_ON(vendor_event_idx < 0 ||
8057                             vendor_event_idx >= wiphy->n_vendor_events))
8058                         return NULL;
8059                 info = &wiphy->vendor_events[vendor_event_idx];
8060                 break;
8061         default:
8062                 WARN_ON(1);
8063                 return NULL;
8064         }
8065
8066         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8067                                            cmd, attr, info, gfp);
8068 }
8069 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8070
8071 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8072 {
8073         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8074         void *hdr = ((void **)skb->cb)[1];
8075         struct nlattr *data = ((void **)skb->cb)[2];
8076         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8077
8078         /* clear CB data for netlink core to own from now on */
8079         memset(skb->cb, 0, sizeof(skb->cb));
8080
8081         nla_nest_end(skb, data);
8082         genlmsg_end(skb, hdr);
8083
8084         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8085                 mcgrp = NL80211_MCGRP_VENDOR;
8086
8087         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8088                                 mcgrp, gfp);
8089 }
8090 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8091
8092 #ifdef CONFIG_NL80211_TESTMODE
8093 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8094 {
8095         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8096         struct wireless_dev *wdev =
8097                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8098         int err;
8099
8100         if (!rdev->ops->testmode_cmd)
8101                 return -EOPNOTSUPP;
8102
8103         if (IS_ERR(wdev)) {
8104                 err = PTR_ERR(wdev);
8105                 if (err != -EINVAL)
8106                         return err;
8107                 wdev = NULL;
8108         } else if (wdev->wiphy != &rdev->wiphy) {
8109                 return -EINVAL;
8110         }
8111
8112         if (!info->attrs[NL80211_ATTR_TESTDATA])
8113                 return -EINVAL;
8114
8115         rdev->cur_cmd_info = info;
8116         err = rdev_testmode_cmd(rdev, wdev,
8117                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8118                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8119         rdev->cur_cmd_info = NULL;
8120
8121         return err;
8122 }
8123
8124 static int nl80211_testmode_dump(struct sk_buff *skb,
8125                                  struct netlink_callback *cb)
8126 {
8127         struct cfg80211_registered_device *rdev;
8128         int err;
8129         long phy_idx;
8130         void *data = NULL;
8131         int data_len = 0;
8132
8133         rtnl_lock();
8134
8135         if (cb->args[0]) {
8136                 /*
8137                  * 0 is a valid index, but not valid for args[0],
8138                  * so we need to offset by 1.
8139                  */
8140                 phy_idx = cb->args[0] - 1;
8141         } else {
8142                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8143                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
8144                                   nl80211_policy);
8145                 if (err)
8146                         goto out_err;
8147
8148                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
8149                                                   nl80211_fam.attrbuf);
8150                 if (IS_ERR(rdev)) {
8151                         err = PTR_ERR(rdev);
8152                         goto out_err;
8153                 }
8154                 phy_idx = rdev->wiphy_idx;
8155                 rdev = NULL;
8156
8157                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
8158                         cb->args[1] =
8159                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
8160         }
8161
8162         if (cb->args[1]) {
8163                 data = nla_data((void *)cb->args[1]);
8164                 data_len = nla_len((void *)cb->args[1]);
8165         }
8166
8167         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8168         if (!rdev) {
8169                 err = -ENOENT;
8170                 goto out_err;
8171         }
8172
8173         if (!rdev->ops->testmode_dump) {
8174                 err = -EOPNOTSUPP;
8175                 goto out_err;
8176         }
8177
8178         while (1) {
8179                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8180                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8181                                            NL80211_CMD_TESTMODE);
8182                 struct nlattr *tmdata;
8183
8184                 if (!hdr)
8185                         break;
8186
8187                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8188                         genlmsg_cancel(skb, hdr);
8189                         break;
8190                 }
8191
8192                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8193                 if (!tmdata) {
8194                         genlmsg_cancel(skb, hdr);
8195                         break;
8196                 }
8197                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8198                 nla_nest_end(skb, tmdata);
8199
8200                 if (err == -ENOBUFS || err == -ENOENT) {
8201                         genlmsg_cancel(skb, hdr);
8202                         break;
8203                 } else if (err) {
8204                         genlmsg_cancel(skb, hdr);
8205                         goto out_err;
8206                 }
8207
8208                 genlmsg_end(skb, hdr);
8209         }
8210
8211         err = skb->len;
8212         /* see above */
8213         cb->args[0] = phy_idx + 1;
8214  out_err:
8215         rtnl_unlock();
8216         return err;
8217 }
8218 #endif
8219
8220 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8221 {
8222         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8223         struct net_device *dev = info->user_ptr[1];
8224         struct cfg80211_connect_params connect;
8225         struct wiphy *wiphy;
8226         struct cfg80211_cached_keys *connkeys = NULL;
8227         int err;
8228
8229         memset(&connect, 0, sizeof(connect));
8230
8231         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8232                 return -EINVAL;
8233
8234         if (!info->attrs[NL80211_ATTR_SSID] ||
8235             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8236                 return -EINVAL;
8237
8238         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8239                 connect.auth_type =
8240                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8241                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8242                                              NL80211_CMD_CONNECT))
8243                         return -EINVAL;
8244         } else
8245                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8246
8247         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8248
8249         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8250                                       NL80211_MAX_NR_CIPHER_SUITES);
8251         if (err)
8252                 return err;
8253
8254         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8255             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8256                 return -EOPNOTSUPP;
8257
8258         wiphy = &rdev->wiphy;
8259
8260         connect.bg_scan_period = -1;
8261         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8262                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8263                 connect.bg_scan_period =
8264                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8265         }
8266
8267         if (info->attrs[NL80211_ATTR_MAC])
8268                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8269         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8270                 connect.bssid_hint =
8271                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8272         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8273         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8274
8275         if (info->attrs[NL80211_ATTR_IE]) {
8276                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8277                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8278         }
8279
8280         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8281                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8282                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8283                     connect.mfp != NL80211_MFP_NO)
8284                         return -EINVAL;
8285         } else {
8286                 connect.mfp = NL80211_MFP_NO;
8287         }
8288
8289         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8290                 connect.prev_bssid =
8291                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8292
8293         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8294                 connect.channel = nl80211_get_valid_chan(
8295                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8296                 if (!connect.channel)
8297                         return -EINVAL;
8298         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8299                 connect.channel_hint = nl80211_get_valid_chan(
8300                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8301                 if (!connect.channel_hint)
8302                         return -EINVAL;
8303         }
8304
8305         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8306                 connkeys = nl80211_parse_connkeys(rdev,
8307                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8308                 if (IS_ERR(connkeys))
8309                         return PTR_ERR(connkeys);
8310         }
8311
8312         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8313                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8314
8315         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8316                 memcpy(&connect.ht_capa_mask,
8317                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8318                        sizeof(connect.ht_capa_mask));
8319
8320         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8321                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8322                         kzfree(connkeys);
8323                         return -EINVAL;
8324                 }
8325                 memcpy(&connect.ht_capa,
8326                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8327                        sizeof(connect.ht_capa));
8328         }
8329
8330         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8331                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8332
8333         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8334                 memcpy(&connect.vht_capa_mask,
8335                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8336                        sizeof(connect.vht_capa_mask));
8337
8338         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8339                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8340                         kzfree(connkeys);
8341                         return -EINVAL;
8342                 }
8343                 memcpy(&connect.vht_capa,
8344                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8345                        sizeof(connect.vht_capa));
8346         }
8347
8348         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8349                 if (!((rdev->wiphy.features &
8350                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8351                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8352                     !wiphy_ext_feature_isset(&rdev->wiphy,
8353                                              NL80211_EXT_FEATURE_RRM)) {
8354                         kzfree(connkeys);
8355                         return -EINVAL;
8356                 }
8357                 connect.flags |= ASSOC_REQ_USE_RRM;
8358         }
8359
8360         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8361         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8362                 kzfree(connkeys);
8363                 return -EOPNOTSUPP;
8364         }
8365
8366         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8367                 /* bss selection makes no sense if bssid is set */
8368                 if (connect.bssid) {
8369                         kzfree(connkeys);
8370                         return -EINVAL;
8371                 }
8372
8373                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8374                                        wiphy, &connect.bss_select);
8375                 if (err) {
8376                         kzfree(connkeys);
8377                         return err;
8378                 }
8379         }
8380
8381         wdev_lock(dev->ieee80211_ptr);
8382         err = cfg80211_connect(rdev, dev, &connect, connkeys,
8383                                connect.prev_bssid);
8384         wdev_unlock(dev->ieee80211_ptr);
8385         if (err)
8386                 kzfree(connkeys);
8387         return err;
8388 }
8389
8390 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8391 {
8392         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8393         struct net_device *dev = info->user_ptr[1];
8394         u16 reason;
8395         int ret;
8396
8397         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8398                 reason = WLAN_REASON_DEAUTH_LEAVING;
8399         else
8400                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8401
8402         if (reason == 0)
8403                 return -EINVAL;
8404
8405         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8406             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8407                 return -EOPNOTSUPP;
8408
8409         wdev_lock(dev->ieee80211_ptr);
8410         ret = cfg80211_disconnect(rdev, dev, reason, true);
8411         wdev_unlock(dev->ieee80211_ptr);
8412         return ret;
8413 }
8414
8415 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8416 {
8417         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8418         struct net *net;
8419         int err;
8420
8421         if (info->attrs[NL80211_ATTR_PID]) {
8422                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8423
8424                 net = get_net_ns_by_pid(pid);
8425         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8426                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8427
8428                 net = get_net_ns_by_fd(fd);
8429         } else {
8430                 return -EINVAL;
8431         }
8432
8433         if (IS_ERR(net))
8434                 return PTR_ERR(net);
8435
8436         err = 0;
8437
8438         /* check if anything to do */
8439         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8440                 err = cfg80211_switch_netns(rdev, net);
8441
8442         put_net(net);
8443         return err;
8444 }
8445
8446 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8447 {
8448         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8449         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8450                         struct cfg80211_pmksa *pmksa) = NULL;
8451         struct net_device *dev = info->user_ptr[1];
8452         struct cfg80211_pmksa pmksa;
8453
8454         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8455
8456         if (!info->attrs[NL80211_ATTR_MAC])
8457                 return -EINVAL;
8458
8459         if (!info->attrs[NL80211_ATTR_PMKID])
8460                 return -EINVAL;
8461
8462         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8463         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8464
8465         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8466             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8467                 return -EOPNOTSUPP;
8468
8469         switch (info->genlhdr->cmd) {
8470         case NL80211_CMD_SET_PMKSA:
8471                 rdev_ops = rdev->ops->set_pmksa;
8472                 break;
8473         case NL80211_CMD_DEL_PMKSA:
8474                 rdev_ops = rdev->ops->del_pmksa;
8475                 break;
8476         default:
8477                 WARN_ON(1);
8478                 break;
8479         }
8480
8481         if (!rdev_ops)
8482                 return -EOPNOTSUPP;
8483
8484         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8485 }
8486
8487 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8488 {
8489         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8490         struct net_device *dev = info->user_ptr[1];
8491
8492         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8493             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8494                 return -EOPNOTSUPP;
8495
8496         if (!rdev->ops->flush_pmksa)
8497                 return -EOPNOTSUPP;
8498
8499         return rdev_flush_pmksa(rdev, dev);
8500 }
8501
8502 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8503 {
8504         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8505         struct net_device *dev = info->user_ptr[1];
8506         u8 action_code, dialog_token;
8507         u32 peer_capability = 0;
8508         u16 status_code;
8509         u8 *peer;
8510         bool initiator;
8511
8512         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8513             !rdev->ops->tdls_mgmt)
8514                 return -EOPNOTSUPP;
8515
8516         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8517             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8518             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8519             !info->attrs[NL80211_ATTR_IE] ||
8520             !info->attrs[NL80211_ATTR_MAC])
8521                 return -EINVAL;
8522
8523         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8524         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8525         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8526         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8527         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8528         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8529                 peer_capability =
8530                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8531
8532         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8533                               dialog_token, status_code, peer_capability,
8534                               initiator,
8535                               nla_data(info->attrs[NL80211_ATTR_IE]),
8536                               nla_len(info->attrs[NL80211_ATTR_IE]));
8537 }
8538
8539 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8540 {
8541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8542         struct net_device *dev = info->user_ptr[1];
8543         enum nl80211_tdls_operation operation;
8544         u8 *peer;
8545
8546         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8547             !rdev->ops->tdls_oper)
8548                 return -EOPNOTSUPP;
8549
8550         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8551             !info->attrs[NL80211_ATTR_MAC])
8552                 return -EINVAL;
8553
8554         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8555         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8556
8557         return rdev_tdls_oper(rdev, dev, peer, operation);
8558 }
8559
8560 static int nl80211_remain_on_channel(struct sk_buff *skb,
8561                                      struct genl_info *info)
8562 {
8563         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8564         struct wireless_dev *wdev = info->user_ptr[1];
8565         struct cfg80211_chan_def chandef;
8566         struct sk_buff *msg;
8567         void *hdr;
8568         u64 cookie;
8569         u32 duration;
8570         int err;
8571
8572         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8573             !info->attrs[NL80211_ATTR_DURATION])
8574                 return -EINVAL;
8575
8576         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8577
8578         if (!rdev->ops->remain_on_channel ||
8579             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8580                 return -EOPNOTSUPP;
8581
8582         /*
8583          * We should be on that channel for at least a minimum amount of
8584          * time (10ms) but no longer than the driver supports.
8585          */
8586         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8587             duration > rdev->wiphy.max_remain_on_channel_duration)
8588                 return -EINVAL;
8589
8590         err = nl80211_parse_chandef(rdev, info, &chandef);
8591         if (err)
8592                 return err;
8593
8594         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8595         if (!msg)
8596                 return -ENOMEM;
8597
8598         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8599                              NL80211_CMD_REMAIN_ON_CHANNEL);
8600         if (!hdr) {
8601                 err = -ENOBUFS;
8602                 goto free_msg;
8603         }
8604
8605         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8606                                      duration, &cookie);
8607
8608         if (err)
8609                 goto free_msg;
8610
8611         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
8612                               NL80211_ATTR_PAD))
8613                 goto nla_put_failure;
8614
8615         genlmsg_end(msg, hdr);
8616
8617         return genlmsg_reply(msg, info);
8618
8619  nla_put_failure:
8620         err = -ENOBUFS;
8621  free_msg:
8622         nlmsg_free(msg);
8623         return err;
8624 }
8625
8626 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8627                                             struct genl_info *info)
8628 {
8629         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8630         struct wireless_dev *wdev = info->user_ptr[1];
8631         u64 cookie;
8632
8633         if (!info->attrs[NL80211_ATTR_COOKIE])
8634                 return -EINVAL;
8635
8636         if (!rdev->ops->cancel_remain_on_channel)
8637                 return -EOPNOTSUPP;
8638
8639         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8640
8641         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8642 }
8643
8644 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8645                            u8 *rates, u8 rates_len)
8646 {
8647         u8 i;
8648         u32 mask = 0;
8649
8650         for (i = 0; i < rates_len; i++) {
8651                 int rate = (rates[i] & 0x7f) * 5;
8652                 int ridx;
8653
8654                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8655                         struct ieee80211_rate *srate =
8656                                 &sband->bitrates[ridx];
8657                         if (rate == srate->bitrate) {
8658                                 mask |= 1 << ridx;
8659                                 break;
8660                         }
8661                 }
8662                 if (ridx == sband->n_bitrates)
8663                         return 0; /* rate not found */
8664         }
8665
8666         return mask;
8667 }
8668
8669 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8670                                u8 *rates, u8 rates_len,
8671                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8672 {
8673         u8 i;
8674
8675         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8676
8677         for (i = 0; i < rates_len; i++) {
8678                 int ridx, rbit;
8679
8680                 ridx = rates[i] / 8;
8681                 rbit = BIT(rates[i] % 8);
8682
8683                 /* check validity */
8684                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8685                         return false;
8686
8687                 /* check availability */
8688                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8689                         mcs[ridx] |= rbit;
8690                 else
8691                         return false;
8692         }
8693
8694         return true;
8695 }
8696
8697 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8698 {
8699         u16 mcs_mask = 0;
8700
8701         switch (vht_mcs_map) {
8702         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8703                 break;
8704         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8705                 mcs_mask = 0x00FF;
8706                 break;
8707         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8708                 mcs_mask = 0x01FF;
8709                 break;
8710         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8711                 mcs_mask = 0x03FF;
8712                 break;
8713         default:
8714                 break;
8715         }
8716
8717         return mcs_mask;
8718 }
8719
8720 static void vht_build_mcs_mask(u16 vht_mcs_map,
8721                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8722 {
8723         u8 nss;
8724
8725         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8726                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8727                 vht_mcs_map >>= 2;
8728         }
8729 }
8730
8731 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8732                              struct nl80211_txrate_vht *txrate,
8733                              u16 mcs[NL80211_VHT_NSS_MAX])
8734 {
8735         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8736         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8737         u8 i;
8738
8739         if (!sband->vht_cap.vht_supported)
8740                 return false;
8741
8742         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8743
8744         /* Build vht_mcs_mask from VHT capabilities */
8745         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8746
8747         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8748                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8749                         mcs[i] = txrate->mcs[i];
8750                 else
8751                         return false;
8752         }
8753
8754         return true;
8755 }
8756
8757 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8758         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8759                                     .len = NL80211_MAX_SUPP_RATES },
8760         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8761                                 .len = NL80211_MAX_SUPP_HT_RATES },
8762         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8763         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8764 };
8765
8766 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8767                                        struct genl_info *info)
8768 {
8769         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8770         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8771         struct cfg80211_bitrate_mask mask;
8772         int rem, i;
8773         struct net_device *dev = info->user_ptr[1];
8774         struct nlattr *tx_rates;
8775         struct ieee80211_supported_band *sband;
8776         u16 vht_tx_mcs_map;
8777
8778         if (!rdev->ops->set_bitrate_mask)
8779                 return -EOPNOTSUPP;
8780
8781         memset(&mask, 0, sizeof(mask));
8782         /* Default to all rates enabled */
8783         for (i = 0; i < NUM_NL80211_BANDS; i++) {
8784                 sband = rdev->wiphy.bands[i];
8785
8786                 if (!sband)
8787                         continue;
8788
8789                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8790                 memcpy(mask.control[i].ht_mcs,
8791                        sband->ht_cap.mcs.rx_mask,
8792                        sizeof(mask.control[i].ht_mcs));
8793
8794                 if (!sband->vht_cap.vht_supported)
8795                         continue;
8796
8797                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8798                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8799         }
8800
8801         /* if no rates are given set it back to the defaults */
8802         if (!info->attrs[NL80211_ATTR_TX_RATES])
8803                 goto out;
8804
8805         /*
8806          * The nested attribute uses enum nl80211_band as the index. This maps
8807          * directly to the enum nl80211_band values used in cfg80211.
8808          */
8809         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8810         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8811                 enum nl80211_band band = nla_type(tx_rates);
8812                 int err;
8813
8814                 if (band < 0 || band >= NUM_NL80211_BANDS)
8815                         return -EINVAL;
8816                 sband = rdev->wiphy.bands[band];
8817                 if (sband == NULL)
8818                         return -EINVAL;
8819                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8820                                 nla_len(tx_rates), nl80211_txattr_policy);
8821                 if (err)
8822                         return err;
8823                 if (tb[NL80211_TXRATE_LEGACY]) {
8824                         mask.control[band].legacy = rateset_to_mask(
8825                                 sband,
8826                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8827                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8828                         if ((mask.control[band].legacy == 0) &&
8829                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8830                                 return -EINVAL;
8831                 }
8832                 if (tb[NL80211_TXRATE_HT]) {
8833                         if (!ht_rateset_to_mask(
8834                                         sband,
8835                                         nla_data(tb[NL80211_TXRATE_HT]),
8836                                         nla_len(tb[NL80211_TXRATE_HT]),
8837                                         mask.control[band].ht_mcs))
8838                                 return -EINVAL;
8839                 }
8840                 if (tb[NL80211_TXRATE_VHT]) {
8841                         if (!vht_set_mcs_mask(
8842                                         sband,
8843                                         nla_data(tb[NL80211_TXRATE_VHT]),
8844                                         mask.control[band].vht_mcs))
8845                                 return -EINVAL;
8846                 }
8847                 if (tb[NL80211_TXRATE_GI]) {
8848                         mask.control[band].gi =
8849                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8850                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8851                                 return -EINVAL;
8852                 }
8853
8854                 if (mask.control[band].legacy == 0) {
8855                         /* don't allow empty legacy rates if HT or VHT
8856                          * are not even supported.
8857                          */
8858                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8859                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8860                                 return -EINVAL;
8861
8862                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8863                                 if (mask.control[band].ht_mcs[i])
8864                                         goto out;
8865
8866                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8867                                 if (mask.control[band].vht_mcs[i])
8868                                         goto out;
8869
8870                         /* legacy and mcs rates may not be both empty */
8871                         return -EINVAL;
8872                 }
8873         }
8874
8875 out:
8876         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8877 }
8878
8879 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8880 {
8881         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8882         struct wireless_dev *wdev = info->user_ptr[1];
8883         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8884
8885         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8886                 return -EINVAL;
8887
8888         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8889                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8890
8891         switch (wdev->iftype) {
8892         case NL80211_IFTYPE_STATION:
8893         case NL80211_IFTYPE_ADHOC:
8894         case NL80211_IFTYPE_P2P_CLIENT:
8895         case NL80211_IFTYPE_AP:
8896         case NL80211_IFTYPE_AP_VLAN:
8897         case NL80211_IFTYPE_MESH_POINT:
8898         case NL80211_IFTYPE_P2P_GO:
8899         case NL80211_IFTYPE_P2P_DEVICE:
8900                 break;
8901         default:
8902                 return -EOPNOTSUPP;
8903         }
8904
8905         /* not much point in registering if we can't reply */
8906         if (!rdev->ops->mgmt_tx)
8907                 return -EOPNOTSUPP;
8908
8909         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8910                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8911                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8912 }
8913
8914 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8915 {
8916         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8917         struct wireless_dev *wdev = info->user_ptr[1];
8918         struct cfg80211_chan_def chandef;
8919         int err;
8920         void *hdr = NULL;
8921         u64 cookie;
8922         struct sk_buff *msg = NULL;
8923         struct cfg80211_mgmt_tx_params params = {
8924                 .dont_wait_for_ack =
8925                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8926         };
8927
8928         if (!info->attrs[NL80211_ATTR_FRAME])
8929                 return -EINVAL;
8930
8931         if (!rdev->ops->mgmt_tx)
8932                 return -EOPNOTSUPP;
8933
8934         switch (wdev->iftype) {
8935         case NL80211_IFTYPE_P2P_DEVICE:
8936                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8937                         return -EINVAL;
8938         case NL80211_IFTYPE_STATION:
8939         case NL80211_IFTYPE_ADHOC:
8940         case NL80211_IFTYPE_P2P_CLIENT:
8941         case NL80211_IFTYPE_AP:
8942         case NL80211_IFTYPE_AP_VLAN:
8943         case NL80211_IFTYPE_MESH_POINT:
8944         case NL80211_IFTYPE_P2P_GO:
8945                 break;
8946         default:
8947                 return -EOPNOTSUPP;
8948         }
8949
8950         if (info->attrs[NL80211_ATTR_DURATION]) {
8951                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8952                         return -EINVAL;
8953                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8954
8955                 /*
8956                  * We should wait on the channel for at least a minimum amount
8957                  * of time (10ms) but no longer than the driver supports.
8958                  */
8959                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8960                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8961                         return -EINVAL;
8962         }
8963
8964         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8965
8966         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8967                 return -EINVAL;
8968
8969         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8970
8971         /* get the channel if any has been specified, otherwise pass NULL to
8972          * the driver. The latter will use the current one
8973          */
8974         chandef.chan = NULL;
8975         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8976                 err = nl80211_parse_chandef(rdev, info, &chandef);
8977                 if (err)
8978                         return err;
8979         }
8980
8981         if (!chandef.chan && params.offchan)
8982                 return -EINVAL;
8983
8984         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8985         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8986
8987         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8988                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8989                 int i;
8990
8991                 if (len % sizeof(u16))
8992                         return -EINVAL;
8993
8994                 params.n_csa_offsets = len / sizeof(u16);
8995                 params.csa_offsets =
8996                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8997
8998                 /* check that all the offsets fit the frame */
8999                 for (i = 0; i < params.n_csa_offsets; i++) {
9000                         if (params.csa_offsets[i] >= params.len)
9001                                 return -EINVAL;
9002                 }
9003         }
9004
9005         if (!params.dont_wait_for_ack) {
9006                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9007                 if (!msg)
9008                         return -ENOMEM;
9009
9010                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9011                                      NL80211_CMD_FRAME);
9012                 if (!hdr) {
9013                         err = -ENOBUFS;
9014                         goto free_msg;
9015                 }
9016         }
9017
9018         params.chan = chandef.chan;
9019         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
9020         if (err)
9021                 goto free_msg;
9022
9023         if (msg) {
9024                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9025                                       NL80211_ATTR_PAD))
9026                         goto nla_put_failure;
9027
9028                 genlmsg_end(msg, hdr);
9029                 return genlmsg_reply(msg, info);
9030         }
9031
9032         return 0;
9033
9034  nla_put_failure:
9035         err = -ENOBUFS;
9036  free_msg:
9037         nlmsg_free(msg);
9038         return err;
9039 }
9040
9041 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9042 {
9043         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9044         struct wireless_dev *wdev = info->user_ptr[1];
9045         u64 cookie;
9046
9047         if (!info->attrs[NL80211_ATTR_COOKIE])
9048                 return -EINVAL;
9049
9050         if (!rdev->ops->mgmt_tx_cancel_wait)
9051                 return -EOPNOTSUPP;
9052
9053         switch (wdev->iftype) {
9054         case NL80211_IFTYPE_STATION:
9055         case NL80211_IFTYPE_ADHOC:
9056         case NL80211_IFTYPE_P2P_CLIENT:
9057         case NL80211_IFTYPE_AP:
9058         case NL80211_IFTYPE_AP_VLAN:
9059         case NL80211_IFTYPE_P2P_GO:
9060         case NL80211_IFTYPE_P2P_DEVICE:
9061                 break;
9062         default:
9063                 return -EOPNOTSUPP;
9064         }
9065
9066         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9067
9068         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9069 }
9070
9071 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9072 {
9073         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9074         struct wireless_dev *wdev;
9075         struct net_device *dev = info->user_ptr[1];
9076         u8 ps_state;
9077         bool state;
9078         int err;
9079
9080         if (!info->attrs[NL80211_ATTR_PS_STATE])
9081                 return -EINVAL;
9082
9083         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9084
9085         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9086                 return -EINVAL;
9087
9088         wdev = dev->ieee80211_ptr;
9089
9090         if (!rdev->ops->set_power_mgmt)
9091                 return -EOPNOTSUPP;
9092
9093         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9094
9095         if (state == wdev->ps)
9096                 return 0;
9097
9098         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9099         if (!err)
9100                 wdev->ps = state;
9101         return err;
9102 }
9103
9104 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9105 {
9106         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9107         enum nl80211_ps_state ps_state;
9108         struct wireless_dev *wdev;
9109         struct net_device *dev = info->user_ptr[1];
9110         struct sk_buff *msg;
9111         void *hdr;
9112         int err;
9113
9114         wdev = dev->ieee80211_ptr;
9115
9116         if (!rdev->ops->set_power_mgmt)
9117                 return -EOPNOTSUPP;
9118
9119         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9120         if (!msg)
9121                 return -ENOMEM;
9122
9123         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9124                              NL80211_CMD_GET_POWER_SAVE);
9125         if (!hdr) {
9126                 err = -ENOBUFS;
9127                 goto free_msg;
9128         }
9129
9130         if (wdev->ps)
9131                 ps_state = NL80211_PS_ENABLED;
9132         else
9133                 ps_state = NL80211_PS_DISABLED;
9134
9135         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9136                 goto nla_put_failure;
9137
9138         genlmsg_end(msg, hdr);
9139         return genlmsg_reply(msg, info);
9140
9141  nla_put_failure:
9142         err = -ENOBUFS;
9143  free_msg:
9144         nlmsg_free(msg);
9145         return err;
9146 }
9147
9148 static const struct nla_policy
9149 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9150         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
9151         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9152         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9153         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9154         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9155         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9156 };
9157
9158 static int nl80211_set_cqm_txe(struct genl_info *info,
9159                                u32 rate, u32 pkts, u32 intvl)
9160 {
9161         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9162         struct net_device *dev = info->user_ptr[1];
9163         struct wireless_dev *wdev = dev->ieee80211_ptr;
9164
9165         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9166                 return -EINVAL;
9167
9168         if (!rdev->ops->set_cqm_txe_config)
9169                 return -EOPNOTSUPP;
9170
9171         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9172             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9173                 return -EOPNOTSUPP;
9174
9175         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9176 }
9177
9178 static int nl80211_set_cqm_rssi(struct genl_info *info,
9179                                 s32 threshold, u32 hysteresis)
9180 {
9181         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9182         struct net_device *dev = info->user_ptr[1];
9183         struct wireless_dev *wdev = dev->ieee80211_ptr;
9184
9185         if (threshold > 0)
9186                 return -EINVAL;
9187
9188         /* disabling - hysteresis should also be zero then */
9189         if (threshold == 0)
9190                 hysteresis = 0;
9191
9192         if (!rdev->ops->set_cqm_rssi_config)
9193                 return -EOPNOTSUPP;
9194
9195         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9196             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9197                 return -EOPNOTSUPP;
9198
9199         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
9200 }
9201
9202 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9203 {
9204         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9205         struct nlattr *cqm;
9206         int err;
9207
9208         cqm = info->attrs[NL80211_ATTR_CQM];
9209         if (!cqm)
9210                 return -EINVAL;
9211
9212         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9213                                nl80211_attr_cqm_policy);
9214         if (err)
9215                 return err;
9216
9217         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9218             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9219                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9220                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9221
9222                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
9223         }
9224
9225         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9226             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9227             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9228                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9229                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9230                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9231
9232                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9233         }
9234
9235         return -EINVAL;
9236 }
9237
9238 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9239 {
9240         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9241         struct net_device *dev = info->user_ptr[1];
9242         struct ocb_setup setup = {};
9243         int err;
9244
9245         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9246         if (err)
9247                 return err;
9248
9249         return cfg80211_join_ocb(rdev, dev, &setup);
9250 }
9251
9252 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9253 {
9254         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9255         struct net_device *dev = info->user_ptr[1];
9256
9257         return cfg80211_leave_ocb(rdev, dev);
9258 }
9259
9260 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9261 {
9262         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9263         struct net_device *dev = info->user_ptr[1];
9264         struct mesh_config cfg;
9265         struct mesh_setup setup;
9266         int err;
9267
9268         /* start with default */
9269         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9270         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9271
9272         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9273                 /* and parse parameters if given */
9274                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9275                 if (err)
9276                         return err;
9277         }
9278
9279         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9280             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9281                 return -EINVAL;
9282
9283         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9284         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9285
9286         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9287             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9288                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9289                         return -EINVAL;
9290
9291         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9292                 setup.beacon_interval =
9293                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9294
9295                 err = cfg80211_validate_beacon_int(rdev, setup.beacon_interval);
9296                 if (err)
9297                         return err;
9298         }
9299
9300         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9301                 setup.dtim_period =
9302                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9303                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9304                         return -EINVAL;
9305         }
9306
9307         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9308                 /* parse additional setup parameters if given */
9309                 err = nl80211_parse_mesh_setup(info, &setup);
9310                 if (err)
9311                         return err;
9312         }
9313
9314         if (setup.user_mpm)
9315                 cfg.auto_open_plinks = false;
9316
9317         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9318                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9319                 if (err)
9320                         return err;
9321         } else {
9322                 /* cfg80211_join_mesh() will sort it out */
9323                 setup.chandef.chan = NULL;
9324         }
9325
9326         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9327                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9328                 int n_rates =
9329                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9330                 struct ieee80211_supported_band *sband;
9331
9332                 if (!setup.chandef.chan)
9333                         return -EINVAL;
9334
9335                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9336
9337                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9338                                              &setup.basic_rates);
9339                 if (err)
9340                         return err;
9341         }
9342
9343         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9344 }
9345
9346 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9347 {
9348         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9349         struct net_device *dev = info->user_ptr[1];
9350
9351         return cfg80211_leave_mesh(rdev, dev);
9352 }
9353
9354 #ifdef CONFIG_PM
9355 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9356                                         struct cfg80211_registered_device *rdev)
9357 {
9358         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9359         struct nlattr *nl_pats, *nl_pat;
9360         int i, pat_len;
9361
9362         if (!wowlan->n_patterns)
9363                 return 0;
9364
9365         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9366         if (!nl_pats)
9367                 return -ENOBUFS;
9368
9369         for (i = 0; i < wowlan->n_patterns; i++) {
9370                 nl_pat = nla_nest_start(msg, i + 1);
9371                 if (!nl_pat)
9372                         return -ENOBUFS;
9373                 pat_len = wowlan->patterns[i].pattern_len;
9374                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9375                             wowlan->patterns[i].mask) ||
9376                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9377                             wowlan->patterns[i].pattern) ||
9378                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9379                                 wowlan->patterns[i].pkt_offset))
9380                         return -ENOBUFS;
9381                 nla_nest_end(msg, nl_pat);
9382         }
9383         nla_nest_end(msg, nl_pats);
9384
9385         return 0;
9386 }
9387
9388 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9389                                    struct cfg80211_wowlan_tcp *tcp)
9390 {
9391         struct nlattr *nl_tcp;
9392
9393         if (!tcp)
9394                 return 0;
9395
9396         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9397         if (!nl_tcp)
9398                 return -ENOBUFS;
9399
9400         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9401             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9402             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9403             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9404             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9405             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9406                     tcp->payload_len, tcp->payload) ||
9407             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9408                         tcp->data_interval) ||
9409             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9410                     tcp->wake_len, tcp->wake_data) ||
9411             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9412                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9413                 return -ENOBUFS;
9414
9415         if (tcp->payload_seq.len &&
9416             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9417                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9418                 return -ENOBUFS;
9419
9420         if (tcp->payload_tok.len &&
9421             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9422                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9423                     &tcp->payload_tok))
9424                 return -ENOBUFS;
9425
9426         nla_nest_end(msg, nl_tcp);
9427
9428         return 0;
9429 }
9430
9431 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9432                                   struct cfg80211_sched_scan_request *req)
9433 {
9434         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9435         int i;
9436
9437         if (!req)
9438                 return 0;
9439
9440         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9441         if (!nd)
9442                 return -ENOBUFS;
9443
9444         if (req->n_scan_plans == 1 &&
9445             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9446                         req->scan_plans[0].interval * 1000))
9447                 return -ENOBUFS;
9448
9449         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9450                 return -ENOBUFS;
9451
9452         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9453         if (!freqs)
9454                 return -ENOBUFS;
9455
9456         for (i = 0; i < req->n_channels; i++) {
9457                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
9458                         return -ENOBUFS;
9459         }
9460
9461         nla_nest_end(msg, freqs);
9462
9463         if (req->n_match_sets) {
9464                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9465                 if (!matches)
9466                         return -ENOBUFS;
9467
9468                 for (i = 0; i < req->n_match_sets; i++) {
9469                         match = nla_nest_start(msg, i);
9470                         if (!match)
9471                                 return -ENOBUFS;
9472
9473                         if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9474                                     req->match_sets[i].ssid.ssid_len,
9475                                     req->match_sets[i].ssid.ssid))
9476                                 return -ENOBUFS;
9477                         nla_nest_end(msg, match);
9478                 }
9479                 nla_nest_end(msg, matches);
9480         }
9481
9482         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9483         if (!scan_plans)
9484                 return -ENOBUFS;
9485
9486         for (i = 0; i < req->n_scan_plans; i++) {
9487                 scan_plan = nla_nest_start(msg, i + 1);
9488                 if (!scan_plan)
9489                         return -ENOBUFS;
9490
9491                 if (!scan_plan ||
9492                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9493                                 req->scan_plans[i].interval) ||
9494                     (req->scan_plans[i].iterations &&
9495                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9496                                  req->scan_plans[i].iterations)))
9497                         return -ENOBUFS;
9498                 nla_nest_end(msg, scan_plan);
9499         }
9500         nla_nest_end(msg, scan_plans);
9501
9502         nla_nest_end(msg, nd);
9503
9504         return 0;
9505 }
9506
9507 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9508 {
9509         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9510         struct sk_buff *msg;
9511         void *hdr;
9512         u32 size = NLMSG_DEFAULT_SIZE;
9513
9514         if (!rdev->wiphy.wowlan)
9515                 return -EOPNOTSUPP;
9516
9517         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9518                 /* adjust size to have room for all the data */
9519                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9520                         rdev->wiphy.wowlan_config->tcp->payload_len +
9521                         rdev->wiphy.wowlan_config->tcp->wake_len +
9522                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9523         }
9524
9525         msg = nlmsg_new(size, GFP_KERNEL);
9526         if (!msg)
9527                 return -ENOMEM;
9528
9529         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9530                              NL80211_CMD_GET_WOWLAN);
9531         if (!hdr)
9532                 goto nla_put_failure;
9533
9534         if (rdev->wiphy.wowlan_config) {
9535                 struct nlattr *nl_wowlan;
9536
9537                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9538                 if (!nl_wowlan)
9539                         goto nla_put_failure;
9540
9541                 if ((rdev->wiphy.wowlan_config->any &&
9542                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9543                     (rdev->wiphy.wowlan_config->disconnect &&
9544                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9545                     (rdev->wiphy.wowlan_config->magic_pkt &&
9546                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9547                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9548                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9549                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9550                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9551                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9552                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9553                     (rdev->wiphy.wowlan_config->rfkill_release &&
9554                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9555                         goto nla_put_failure;
9556
9557                 if (nl80211_send_wowlan_patterns(msg, rdev))
9558                         goto nla_put_failure;
9559
9560                 if (nl80211_send_wowlan_tcp(msg,
9561                                             rdev->wiphy.wowlan_config->tcp))
9562                         goto nla_put_failure;
9563
9564                 if (nl80211_send_wowlan_nd(
9565                             msg,
9566                             rdev->wiphy.wowlan_config->nd_config))
9567                         goto nla_put_failure;
9568
9569                 nla_nest_end(msg, nl_wowlan);
9570         }
9571
9572         genlmsg_end(msg, hdr);
9573         return genlmsg_reply(msg, info);
9574
9575 nla_put_failure:
9576         nlmsg_free(msg);
9577         return -ENOBUFS;
9578 }
9579
9580 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9581                                     struct nlattr *attr,
9582                                     struct cfg80211_wowlan *trig)
9583 {
9584         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9585         struct cfg80211_wowlan_tcp *cfg;
9586         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9587         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9588         u32 size;
9589         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9590         int err, port;
9591
9592         if (!rdev->wiphy.wowlan->tcp)
9593                 return -EINVAL;
9594
9595         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9596                         nla_data(attr), nla_len(attr),
9597                         nl80211_wowlan_tcp_policy);
9598         if (err)
9599                 return err;
9600
9601         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9602             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9603             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9604             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9605             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9606             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9607             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9608             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9609                 return -EINVAL;
9610
9611         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9612         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9613                 return -EINVAL;
9614
9615         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9616                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9617             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9618                 return -EINVAL;
9619
9620         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9621         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9622                 return -EINVAL;
9623
9624         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9625         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9626                 return -EINVAL;
9627
9628         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9629                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9630
9631                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9632                 tokens_size = tokln - sizeof(*tok);
9633
9634                 if (!tok->len || tokens_size % tok->len)
9635                         return -EINVAL;
9636                 if (!rdev->wiphy.wowlan->tcp->tok)
9637                         return -EINVAL;
9638                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9639                         return -EINVAL;
9640                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9641                         return -EINVAL;
9642                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9643                         return -EINVAL;
9644                 if (tok->offset + tok->len > data_size)
9645                         return -EINVAL;
9646         }
9647
9648         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9649                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9650                 if (!rdev->wiphy.wowlan->tcp->seq)
9651                         return -EINVAL;
9652                 if (seq->len == 0 || seq->len > 4)
9653                         return -EINVAL;
9654                 if (seq->len + seq->offset > data_size)
9655                         return -EINVAL;
9656         }
9657
9658         size = sizeof(*cfg);
9659         size += data_size;
9660         size += wake_size + wake_mask_size;
9661         size += tokens_size;
9662
9663         cfg = kzalloc(size, GFP_KERNEL);
9664         if (!cfg)
9665                 return -ENOMEM;
9666         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9667         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9668         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9669                ETH_ALEN);
9670         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9671                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9672         else
9673                 port = 0;
9674 #ifdef CONFIG_INET
9675         /* allocate a socket and port for it and use it */
9676         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9677                             IPPROTO_TCP, &cfg->sock, 1);
9678         if (err) {
9679                 kfree(cfg);
9680                 return err;
9681         }
9682         if (inet_csk_get_port(cfg->sock->sk, port)) {
9683                 sock_release(cfg->sock);
9684                 kfree(cfg);
9685                 return -EADDRINUSE;
9686         }
9687         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9688 #else
9689         if (!port) {
9690                 kfree(cfg);
9691                 return -EINVAL;
9692         }
9693         cfg->src_port = port;
9694 #endif
9695
9696         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9697         cfg->payload_len = data_size;
9698         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9699         memcpy((void *)cfg->payload,
9700                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9701                data_size);
9702         if (seq)
9703                 cfg->payload_seq = *seq;
9704         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9705         cfg->wake_len = wake_size;
9706         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9707         memcpy((void *)cfg->wake_data,
9708                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9709                wake_size);
9710         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9711                          data_size + wake_size;
9712         memcpy((void *)cfg->wake_mask,
9713                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9714                wake_mask_size);
9715         if (tok) {
9716                 cfg->tokens_size = tokens_size;
9717                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9718         }
9719
9720         trig->tcp = cfg;
9721
9722         return 0;
9723 }
9724
9725 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9726                                    const struct wiphy_wowlan_support *wowlan,
9727                                    struct nlattr *attr,
9728                                    struct cfg80211_wowlan *trig)
9729 {
9730         struct nlattr **tb;
9731         int err;
9732
9733         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9734         if (!tb)
9735                 return -ENOMEM;
9736
9737         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9738                 err = -EOPNOTSUPP;
9739                 goto out;
9740         }
9741
9742         err = nla_parse(tb, NL80211_ATTR_MAX,
9743                         nla_data(attr), nla_len(attr),
9744                         nl80211_policy);
9745         if (err)
9746                 goto out;
9747
9748         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9749         err = PTR_ERR_OR_ZERO(trig->nd_config);
9750         if (err)
9751                 trig->nd_config = NULL;
9752
9753 out:
9754         kfree(tb);
9755         return err;
9756 }
9757
9758 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9759 {
9760         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9761         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9762         struct cfg80211_wowlan new_triggers = {};
9763         struct cfg80211_wowlan *ntrig;
9764         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9765         int err, i;
9766         bool prev_enabled = rdev->wiphy.wowlan_config;
9767         bool regular = false;
9768
9769         if (!wowlan)
9770                 return -EOPNOTSUPP;
9771
9772         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9773                 cfg80211_rdev_free_wowlan(rdev);
9774                 rdev->wiphy.wowlan_config = NULL;
9775                 goto set_wakeup;
9776         }
9777
9778         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9779                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9780                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9781                         nl80211_wowlan_policy);
9782         if (err)
9783                 return err;
9784
9785         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9786                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9787                         return -EINVAL;
9788                 new_triggers.any = true;
9789         }
9790
9791         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9792                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9793                         return -EINVAL;
9794                 new_triggers.disconnect = true;
9795                 regular = true;
9796         }
9797
9798         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9799                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9800                         return -EINVAL;
9801                 new_triggers.magic_pkt = true;
9802                 regular = true;
9803         }
9804
9805         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9806                 return -EINVAL;
9807
9808         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9809                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9810                         return -EINVAL;
9811                 new_triggers.gtk_rekey_failure = true;
9812                 regular = true;
9813         }
9814
9815         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9816                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9817                         return -EINVAL;
9818                 new_triggers.eap_identity_req = true;
9819                 regular = true;
9820         }
9821
9822         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9823                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9824                         return -EINVAL;
9825                 new_triggers.four_way_handshake = true;
9826                 regular = true;
9827         }
9828
9829         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9830                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9831                         return -EINVAL;
9832                 new_triggers.rfkill_release = true;
9833                 regular = true;
9834         }
9835
9836         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9837                 struct nlattr *pat;
9838                 int n_patterns = 0;
9839                 int rem, pat_len, mask_len, pkt_offset;
9840                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9841
9842                 regular = true;
9843
9844                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9845                                     rem)
9846                         n_patterns++;
9847                 if (n_patterns > wowlan->n_patterns)
9848                         return -EINVAL;
9849
9850                 new_triggers.patterns = kcalloc(n_patterns,
9851                                                 sizeof(new_triggers.patterns[0]),
9852                                                 GFP_KERNEL);
9853                 if (!new_triggers.patterns)
9854                         return -ENOMEM;
9855
9856                 new_triggers.n_patterns = n_patterns;
9857                 i = 0;
9858
9859                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9860                                     rem) {
9861                         u8 *mask_pat;
9862
9863                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9864                                   nla_len(pat), NULL);
9865                         err = -EINVAL;
9866                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9867                             !pat_tb[NL80211_PKTPAT_PATTERN])
9868                                 goto error;
9869                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9870                         mask_len = DIV_ROUND_UP(pat_len, 8);
9871                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9872                                 goto error;
9873                         if (pat_len > wowlan->pattern_max_len ||
9874                             pat_len < wowlan->pattern_min_len)
9875                                 goto error;
9876
9877                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9878                                 pkt_offset = 0;
9879                         else
9880                                 pkt_offset = nla_get_u32(
9881                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9882                         if (pkt_offset > wowlan->max_pkt_offset)
9883                                 goto error;
9884                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9885
9886                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9887                         if (!mask_pat) {
9888                                 err = -ENOMEM;
9889                                 goto error;
9890                         }
9891                         new_triggers.patterns[i].mask = mask_pat;
9892                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9893                                mask_len);
9894                         mask_pat += mask_len;
9895                         new_triggers.patterns[i].pattern = mask_pat;
9896                         new_triggers.patterns[i].pattern_len = pat_len;
9897                         memcpy(mask_pat,
9898                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9899                                pat_len);
9900                         i++;
9901                 }
9902         }
9903
9904         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9905                 regular = true;
9906                 err = nl80211_parse_wowlan_tcp(
9907                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9908                         &new_triggers);
9909                 if (err)
9910                         goto error;
9911         }
9912
9913         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9914                 regular = true;
9915                 err = nl80211_parse_wowlan_nd(
9916                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9917                         &new_triggers);
9918                 if (err)
9919                         goto error;
9920         }
9921
9922         /* The 'any' trigger means the device continues operating more or less
9923          * as in its normal operation mode and wakes up the host on most of the
9924          * normal interrupts (like packet RX, ...)
9925          * It therefore makes little sense to combine with the more constrained
9926          * wakeup trigger modes.
9927          */
9928         if (new_triggers.any && regular) {
9929                 err = -EINVAL;
9930                 goto error;
9931         }
9932
9933         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9934         if (!ntrig) {
9935                 err = -ENOMEM;
9936                 goto error;
9937         }
9938         cfg80211_rdev_free_wowlan(rdev);
9939         rdev->wiphy.wowlan_config = ntrig;
9940
9941  set_wakeup:
9942         if (rdev->ops->set_wakeup &&
9943             prev_enabled != !!rdev->wiphy.wowlan_config)
9944                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9945
9946         return 0;
9947  error:
9948         for (i = 0; i < new_triggers.n_patterns; i++)
9949                 kfree(new_triggers.patterns[i].mask);
9950         kfree(new_triggers.patterns);
9951         if (new_triggers.tcp && new_triggers.tcp->sock)
9952                 sock_release(new_triggers.tcp->sock);
9953         kfree(new_triggers.tcp);
9954         kfree(new_triggers.nd_config);
9955         return err;
9956 }
9957 #endif
9958
9959 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9960                                        struct cfg80211_registered_device *rdev)
9961 {
9962         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9963         int i, j, pat_len;
9964         struct cfg80211_coalesce_rules *rule;
9965
9966         if (!rdev->coalesce->n_rules)
9967                 return 0;
9968
9969         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9970         if (!nl_rules)
9971                 return -ENOBUFS;
9972
9973         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9974                 nl_rule = nla_nest_start(msg, i + 1);
9975                 if (!nl_rule)
9976                         return -ENOBUFS;
9977
9978                 rule = &rdev->coalesce->rules[i];
9979                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9980                                 rule->delay))
9981                         return -ENOBUFS;
9982
9983                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9984                                 rule->condition))
9985                         return -ENOBUFS;
9986
9987                 nl_pats = nla_nest_start(msg,
9988                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9989                 if (!nl_pats)
9990                         return -ENOBUFS;
9991
9992                 for (j = 0; j < rule->n_patterns; j++) {
9993                         nl_pat = nla_nest_start(msg, j + 1);
9994                         if (!nl_pat)
9995                                 return -ENOBUFS;
9996                         pat_len = rule->patterns[j].pattern_len;
9997                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9998                                     DIV_ROUND_UP(pat_len, 8),
9999                                     rule->patterns[j].mask) ||
10000                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10001                                     rule->patterns[j].pattern) ||
10002                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10003                                         rule->patterns[j].pkt_offset))
10004                                 return -ENOBUFS;
10005                         nla_nest_end(msg, nl_pat);
10006                 }
10007                 nla_nest_end(msg, nl_pats);
10008                 nla_nest_end(msg, nl_rule);
10009         }
10010         nla_nest_end(msg, nl_rules);
10011
10012         return 0;
10013 }
10014
10015 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
10016 {
10017         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10018         struct sk_buff *msg;
10019         void *hdr;
10020
10021         if (!rdev->wiphy.coalesce)
10022                 return -EOPNOTSUPP;
10023
10024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10025         if (!msg)
10026                 return -ENOMEM;
10027
10028         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10029                              NL80211_CMD_GET_COALESCE);
10030         if (!hdr)
10031                 goto nla_put_failure;
10032
10033         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
10034                 goto nla_put_failure;
10035
10036         genlmsg_end(msg, hdr);
10037         return genlmsg_reply(msg, info);
10038
10039 nla_put_failure:
10040         nlmsg_free(msg);
10041         return -ENOBUFS;
10042 }
10043
10044 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
10045 {
10046         struct cfg80211_coalesce *coalesce = rdev->coalesce;
10047         int i, j;
10048         struct cfg80211_coalesce_rules *rule;
10049
10050         if (!coalesce)
10051                 return;
10052
10053         for (i = 0; i < coalesce->n_rules; i++) {
10054                 rule = &coalesce->rules[i];
10055                 for (j = 0; j < rule->n_patterns; j++)
10056                         kfree(rule->patterns[j].mask);
10057                 kfree(rule->patterns);
10058         }
10059         kfree(coalesce->rules);
10060         kfree(coalesce);
10061         rdev->coalesce = NULL;
10062 }
10063
10064 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10065                                        struct nlattr *rule,
10066                                        struct cfg80211_coalesce_rules *new_rule)
10067 {
10068         int err, i;
10069         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10070         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10071         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10072         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10073
10074         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
10075                         nla_len(rule), nl80211_coalesce_policy);
10076         if (err)
10077                 return err;
10078
10079         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10080                 new_rule->delay =
10081                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10082         if (new_rule->delay > coalesce->max_delay)
10083                 return -EINVAL;
10084
10085         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10086                 new_rule->condition =
10087                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10088         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10089             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10090                 return -EINVAL;
10091
10092         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10093                 return -EINVAL;
10094
10095         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10096                             rem)
10097                 n_patterns++;
10098         if (n_patterns > coalesce->n_patterns)
10099                 return -EINVAL;
10100
10101         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10102                                      GFP_KERNEL);
10103         if (!new_rule->patterns)
10104                 return -ENOMEM;
10105
10106         new_rule->n_patterns = n_patterns;
10107         i = 0;
10108
10109         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10110                             rem) {
10111                 u8 *mask_pat;
10112
10113                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
10114                           nla_len(pat), NULL);
10115                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10116                     !pat_tb[NL80211_PKTPAT_PATTERN])
10117                         return -EINVAL;
10118                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10119                 mask_len = DIV_ROUND_UP(pat_len, 8);
10120                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10121                         return -EINVAL;
10122                 if (pat_len > coalesce->pattern_max_len ||
10123                     pat_len < coalesce->pattern_min_len)
10124                         return -EINVAL;
10125
10126                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10127                         pkt_offset = 0;
10128                 else
10129                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10130                 if (pkt_offset > coalesce->max_pkt_offset)
10131                         return -EINVAL;
10132                 new_rule->patterns[i].pkt_offset = pkt_offset;
10133
10134                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10135                 if (!mask_pat)
10136                         return -ENOMEM;
10137
10138                 new_rule->patterns[i].mask = mask_pat;
10139                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10140                        mask_len);
10141
10142                 mask_pat += mask_len;
10143                 new_rule->patterns[i].pattern = mask_pat;
10144                 new_rule->patterns[i].pattern_len = pat_len;
10145                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10146                        pat_len);
10147                 i++;
10148         }
10149
10150         return 0;
10151 }
10152
10153 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10154 {
10155         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10156         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10157         struct cfg80211_coalesce new_coalesce = {};
10158         struct cfg80211_coalesce *n_coalesce;
10159         int err, rem_rule, n_rules = 0, i, j;
10160         struct nlattr *rule;
10161         struct cfg80211_coalesce_rules *tmp_rule;
10162
10163         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10164                 return -EOPNOTSUPP;
10165
10166         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10167                 cfg80211_rdev_free_coalesce(rdev);
10168                 rdev_set_coalesce(rdev, NULL);
10169                 return 0;
10170         }
10171
10172         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10173                             rem_rule)
10174                 n_rules++;
10175         if (n_rules > coalesce->n_rules)
10176                 return -EINVAL;
10177
10178         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10179                                      GFP_KERNEL);
10180         if (!new_coalesce.rules)
10181                 return -ENOMEM;
10182
10183         new_coalesce.n_rules = n_rules;
10184         i = 0;
10185
10186         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10187                             rem_rule) {
10188                 err = nl80211_parse_coalesce_rule(rdev, rule,
10189                                                   &new_coalesce.rules[i]);
10190                 if (err)
10191                         goto error;
10192
10193                 i++;
10194         }
10195
10196         err = rdev_set_coalesce(rdev, &new_coalesce);
10197         if (err)
10198                 goto error;
10199
10200         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10201         if (!n_coalesce) {
10202                 err = -ENOMEM;
10203                 goto error;
10204         }
10205         cfg80211_rdev_free_coalesce(rdev);
10206         rdev->coalesce = n_coalesce;
10207
10208         return 0;
10209 error:
10210         for (i = 0; i < new_coalesce.n_rules; i++) {
10211                 tmp_rule = &new_coalesce.rules[i];
10212                 for (j = 0; j < tmp_rule->n_patterns; j++)
10213                         kfree(tmp_rule->patterns[j].mask);
10214                 kfree(tmp_rule->patterns);
10215         }
10216         kfree(new_coalesce.rules);
10217
10218         return err;
10219 }
10220
10221 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10222 {
10223         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10224         struct net_device *dev = info->user_ptr[1];
10225         struct wireless_dev *wdev = dev->ieee80211_ptr;
10226         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10227         struct cfg80211_gtk_rekey_data rekey_data;
10228         int err;
10229
10230         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10231                 return -EINVAL;
10232
10233         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
10234                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
10235                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
10236                         nl80211_rekey_policy);
10237         if (err)
10238                 return err;
10239
10240         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10241                 return -ERANGE;
10242         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10243                 return -ERANGE;
10244         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10245                 return -ERANGE;
10246
10247         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10248         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10249         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10250
10251         wdev_lock(wdev);
10252         if (!wdev->current_bss) {
10253                 err = -ENOTCONN;
10254                 goto out;
10255         }
10256
10257         if (!rdev->ops->set_rekey_data) {
10258                 err = -EOPNOTSUPP;
10259                 goto out;
10260         }
10261
10262         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10263  out:
10264         wdev_unlock(wdev);
10265         return err;
10266 }
10267
10268 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10269                                              struct genl_info *info)
10270 {
10271         struct net_device *dev = info->user_ptr[1];
10272         struct wireless_dev *wdev = dev->ieee80211_ptr;
10273
10274         if (wdev->iftype != NL80211_IFTYPE_AP &&
10275             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10276                 return -EINVAL;
10277
10278         if (wdev->ap_unexpected_nlportid)
10279                 return -EBUSY;
10280
10281         wdev->ap_unexpected_nlportid = info->snd_portid;
10282         return 0;
10283 }
10284
10285 static int nl80211_probe_client(struct sk_buff *skb,
10286                                 struct genl_info *info)
10287 {
10288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10289         struct net_device *dev = info->user_ptr[1];
10290         struct wireless_dev *wdev = dev->ieee80211_ptr;
10291         struct sk_buff *msg;
10292         void *hdr;
10293         const u8 *addr;
10294         u64 cookie;
10295         int err;
10296
10297         if (wdev->iftype != NL80211_IFTYPE_AP &&
10298             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10299                 return -EOPNOTSUPP;
10300
10301         if (!info->attrs[NL80211_ATTR_MAC])
10302                 return -EINVAL;
10303
10304         if (!rdev->ops->probe_client)
10305                 return -EOPNOTSUPP;
10306
10307         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10308         if (!msg)
10309                 return -ENOMEM;
10310
10311         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10312                              NL80211_CMD_PROBE_CLIENT);
10313         if (!hdr) {
10314                 err = -ENOBUFS;
10315                 goto free_msg;
10316         }
10317
10318         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10319
10320         err = rdev_probe_client(rdev, dev, addr, &cookie);
10321         if (err)
10322                 goto free_msg;
10323
10324         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10325                               NL80211_ATTR_PAD))
10326                 goto nla_put_failure;
10327
10328         genlmsg_end(msg, hdr);
10329
10330         return genlmsg_reply(msg, info);
10331
10332  nla_put_failure:
10333         err = -ENOBUFS;
10334  free_msg:
10335         nlmsg_free(msg);
10336         return err;
10337 }
10338
10339 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10340 {
10341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10342         struct cfg80211_beacon_registration *reg, *nreg;
10343         int rv;
10344
10345         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10346                 return -EOPNOTSUPP;
10347
10348         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10349         if (!nreg)
10350                 return -ENOMEM;
10351
10352         /* First, check if already registered. */
10353         spin_lock_bh(&rdev->beacon_registrations_lock);
10354         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10355                 if (reg->nlportid == info->snd_portid) {
10356                         rv = -EALREADY;
10357                         goto out_err;
10358                 }
10359         }
10360         /* Add it to the list */
10361         nreg->nlportid = info->snd_portid;
10362         list_add(&nreg->list, &rdev->beacon_registrations);
10363
10364         spin_unlock_bh(&rdev->beacon_registrations_lock);
10365
10366         return 0;
10367 out_err:
10368         spin_unlock_bh(&rdev->beacon_registrations_lock);
10369         kfree(nreg);
10370         return rv;
10371 }
10372
10373 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
10374 {
10375         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10376         struct wireless_dev *wdev = info->user_ptr[1];
10377         int err;
10378
10379         if (!rdev->ops->start_p2p_device)
10380                 return -EOPNOTSUPP;
10381
10382         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10383                 return -EOPNOTSUPP;
10384
10385         if (wdev->p2p_started)
10386                 return 0;
10387
10388         if (rfkill_blocked(rdev->rfkill))
10389                 return -ERFKILL;
10390
10391         err = rdev_start_p2p_device(rdev, wdev);
10392         if (err)
10393                 return err;
10394
10395         wdev->p2p_started = true;
10396         rdev->opencount++;
10397
10398         return 0;
10399 }
10400
10401 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10402 {
10403         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10404         struct wireless_dev *wdev = info->user_ptr[1];
10405
10406         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10407                 return -EOPNOTSUPP;
10408
10409         if (!rdev->ops->stop_p2p_device)
10410                 return -EOPNOTSUPP;
10411
10412         cfg80211_stop_p2p_device(rdev, wdev);
10413
10414         return 0;
10415 }
10416
10417 static int nl80211_get_protocol_features(struct sk_buff *skb,
10418                                          struct genl_info *info)
10419 {
10420         void *hdr;
10421         struct sk_buff *msg;
10422
10423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10424         if (!msg)
10425                 return -ENOMEM;
10426
10427         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10428                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10429         if (!hdr)
10430                 goto nla_put_failure;
10431
10432         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10433                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10434                 goto nla_put_failure;
10435
10436         genlmsg_end(msg, hdr);
10437         return genlmsg_reply(msg, info);
10438
10439  nla_put_failure:
10440         kfree_skb(msg);
10441         return -ENOBUFS;
10442 }
10443
10444 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10445 {
10446         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10447         struct cfg80211_update_ft_ies_params ft_params;
10448         struct net_device *dev = info->user_ptr[1];
10449
10450         if (!rdev->ops->update_ft_ies)
10451                 return -EOPNOTSUPP;
10452
10453         if (!info->attrs[NL80211_ATTR_MDID] ||
10454             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10455                 return -EINVAL;
10456
10457         memset(&ft_params, 0, sizeof(ft_params));
10458         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10459         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10460         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10461
10462         return rdev_update_ft_ies(rdev, dev, &ft_params);
10463 }
10464
10465 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10466                                        struct genl_info *info)
10467 {
10468         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10469         struct wireless_dev *wdev = info->user_ptr[1];
10470         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10471         u16 duration;
10472         int ret;
10473
10474         if (!rdev->ops->crit_proto_start)
10475                 return -EOPNOTSUPP;
10476
10477         if (WARN_ON(!rdev->ops->crit_proto_stop))
10478                 return -EINVAL;
10479
10480         if (rdev->crit_proto_nlportid)
10481                 return -EBUSY;
10482
10483         /* determine protocol if provided */
10484         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10485                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10486
10487         if (proto >= NUM_NL80211_CRIT_PROTO)
10488                 return -EINVAL;
10489
10490         /* timeout must be provided */
10491         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10492                 return -EINVAL;
10493
10494         duration =
10495                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10496
10497         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10498                 return -ERANGE;
10499
10500         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10501         if (!ret)
10502                 rdev->crit_proto_nlportid = info->snd_portid;
10503
10504         return ret;
10505 }
10506
10507 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10508                                       struct genl_info *info)
10509 {
10510         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10511         struct wireless_dev *wdev = info->user_ptr[1];
10512
10513         if (!rdev->ops->crit_proto_stop)
10514                 return -EOPNOTSUPP;
10515
10516         if (rdev->crit_proto_nlportid) {
10517                 rdev->crit_proto_nlportid = 0;
10518                 rdev_crit_proto_stop(rdev, wdev);
10519         }
10520         return 0;
10521 }
10522
10523 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10524 {
10525         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10526         struct wireless_dev *wdev =
10527                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10528         int i, err;
10529         u32 vid, subcmd;
10530
10531         if (!rdev->wiphy.vendor_commands)
10532                 return -EOPNOTSUPP;
10533
10534         if (IS_ERR(wdev)) {
10535                 err = PTR_ERR(wdev);
10536                 if (err != -EINVAL)
10537                         return err;
10538                 wdev = NULL;
10539         } else if (wdev->wiphy != &rdev->wiphy) {
10540                 return -EINVAL;
10541         }
10542
10543         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10544             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10545                 return -EINVAL;
10546
10547         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10548         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10549         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10550                 const struct wiphy_vendor_command *vcmd;
10551                 void *data = NULL;
10552                 int len = 0;
10553
10554                 vcmd = &rdev->wiphy.vendor_commands[i];
10555
10556                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10557                         continue;
10558
10559                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10560                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10561                         if (!wdev)
10562                                 return -EINVAL;
10563                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10564                             !wdev->netdev)
10565                                 return -EINVAL;
10566
10567                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10568                                 if (wdev->netdev &&
10569                                     !netif_running(wdev->netdev))
10570                                         return -ENETDOWN;
10571                                 if (!wdev->netdev && !wdev->p2p_started)
10572                                         return -ENETDOWN;
10573                         }
10574
10575                         if (!vcmd->doit)
10576                                 return -EOPNOTSUPP;
10577                 } else {
10578                         wdev = NULL;
10579                 }
10580
10581                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10582                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10583                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10584                 }
10585
10586                 rdev->cur_cmd_info = info;
10587                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10588                                                           data, len);
10589                 rdev->cur_cmd_info = NULL;
10590                 return err;
10591         }
10592
10593         return -EOPNOTSUPP;
10594 }
10595
10596 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10597                                        struct netlink_callback *cb,
10598                                        struct cfg80211_registered_device **rdev,
10599                                        struct wireless_dev **wdev)
10600 {
10601         u32 vid, subcmd;
10602         unsigned int i;
10603         int vcmd_idx = -1;
10604         int err;
10605         void *data = NULL;
10606         unsigned int data_len = 0;
10607
10608         rtnl_lock();
10609
10610         if (cb->args[0]) {
10611                 /* subtract the 1 again here */
10612                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10613                 struct wireless_dev *tmp;
10614
10615                 if (!wiphy) {
10616                         err = -ENODEV;
10617                         goto out_unlock;
10618                 }
10619                 *rdev = wiphy_to_rdev(wiphy);
10620                 *wdev = NULL;
10621
10622                 if (cb->args[1]) {
10623                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
10624                                 if (tmp->identifier == cb->args[1] - 1) {
10625                                         *wdev = tmp;
10626                                         break;
10627                                 }
10628                         }
10629                 }
10630
10631                 /* keep rtnl locked in successful case */
10632                 return 0;
10633         }
10634
10635         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10636                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10637                           nl80211_policy);
10638         if (err)
10639                 goto out_unlock;
10640
10641         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10642             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
10643                 err = -EINVAL;
10644                 goto out_unlock;
10645         }
10646
10647         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10648                                            nl80211_fam.attrbuf);
10649         if (IS_ERR(*wdev))
10650                 *wdev = NULL;
10651
10652         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10653                                            nl80211_fam.attrbuf);
10654         if (IS_ERR(*rdev)) {
10655                 err = PTR_ERR(*rdev);
10656                 goto out_unlock;
10657         }
10658
10659         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10660         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10661
10662         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10663                 const struct wiphy_vendor_command *vcmd;
10664
10665                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10666
10667                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10668                         continue;
10669
10670                 if (!vcmd->dumpit) {
10671                         err = -EOPNOTSUPP;
10672                         goto out_unlock;
10673                 }
10674
10675                 vcmd_idx = i;
10676                 break;
10677         }
10678
10679         if (vcmd_idx < 0) {
10680                 err = -EOPNOTSUPP;
10681                 goto out_unlock;
10682         }
10683
10684         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10685                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10686                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10687         }
10688
10689         /* 0 is the first index - add 1 to parse only once */
10690         cb->args[0] = (*rdev)->wiphy_idx + 1;
10691         /* add 1 to know if it was NULL */
10692         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10693         cb->args[2] = vcmd_idx;
10694         cb->args[3] = (unsigned long)data;
10695         cb->args[4] = data_len;
10696
10697         /* keep rtnl locked in successful case */
10698         return 0;
10699  out_unlock:
10700         rtnl_unlock();
10701         return err;
10702 }
10703
10704 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10705                                    struct netlink_callback *cb)
10706 {
10707         struct cfg80211_registered_device *rdev;
10708         struct wireless_dev *wdev;
10709         unsigned int vcmd_idx;
10710         const struct wiphy_vendor_command *vcmd;
10711         void *data;
10712         int data_len;
10713         int err;
10714         struct nlattr *vendor_data;
10715
10716         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10717         if (err)
10718                 return err;
10719
10720         vcmd_idx = cb->args[2];
10721         data = (void *)cb->args[3];
10722         data_len = cb->args[4];
10723         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10724
10725         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10726                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10727                 if (!wdev)
10728                         return -EINVAL;
10729                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10730                     !wdev->netdev)
10731                         return -EINVAL;
10732
10733                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10734                         if (wdev->netdev &&
10735                             !netif_running(wdev->netdev))
10736                                 return -ENETDOWN;
10737                         if (!wdev->netdev && !wdev->p2p_started)
10738                                 return -ENETDOWN;
10739                 }
10740         }
10741
10742         while (1) {
10743                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10744                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10745                                            NL80211_CMD_VENDOR);
10746                 if (!hdr)
10747                         break;
10748
10749                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10750                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
10751                                                wdev_id(wdev),
10752                                                NL80211_ATTR_PAD))) {
10753                         genlmsg_cancel(skb, hdr);
10754                         break;
10755                 }
10756
10757                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10758                 if (!vendor_data) {
10759                         genlmsg_cancel(skb, hdr);
10760                         break;
10761                 }
10762
10763                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10764                                    (unsigned long *)&cb->args[5]);
10765                 nla_nest_end(skb, vendor_data);
10766
10767                 if (err == -ENOBUFS || err == -ENOENT) {
10768                         genlmsg_cancel(skb, hdr);
10769                         break;
10770                 } else if (err) {
10771                         genlmsg_cancel(skb, hdr);
10772                         goto out;
10773                 }
10774
10775                 genlmsg_end(skb, hdr);
10776         }
10777
10778         err = skb->len;
10779  out:
10780         rtnl_unlock();
10781         return err;
10782 }
10783
10784 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10785                                            enum nl80211_commands cmd,
10786                                            enum nl80211_attrs attr,
10787                                            int approxlen)
10788 {
10789         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10790
10791         if (WARN_ON(!rdev->cur_cmd_info))
10792                 return NULL;
10793
10794         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10795                                            rdev->cur_cmd_info->snd_portid,
10796                                            rdev->cur_cmd_info->snd_seq,
10797                                            cmd, attr, NULL, GFP_KERNEL);
10798 }
10799 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10800
10801 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10802 {
10803         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10804         void *hdr = ((void **)skb->cb)[1];
10805         struct nlattr *data = ((void **)skb->cb)[2];
10806
10807         /* clear CB data for netlink core to own from now on */
10808         memset(skb->cb, 0, sizeof(skb->cb));
10809
10810         if (WARN_ON(!rdev->cur_cmd_info)) {
10811                 kfree_skb(skb);
10812                 return -EINVAL;
10813         }
10814
10815         nla_nest_end(skb, data);
10816         genlmsg_end(skb, hdr);
10817         return genlmsg_reply(skb, rdev->cur_cmd_info);
10818 }
10819 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10820
10821 static int nl80211_set_qos_map(struct sk_buff *skb,
10822                                struct genl_info *info)
10823 {
10824         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10825         struct cfg80211_qos_map *qos_map = NULL;
10826         struct net_device *dev = info->user_ptr[1];
10827         u8 *pos, len, num_des, des_len, des;
10828         int ret;
10829
10830         if (!rdev->ops->set_qos_map)
10831                 return -EOPNOTSUPP;
10832
10833         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10834                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10835                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10836
10837                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10838                     len > IEEE80211_QOS_MAP_LEN_MAX)
10839                         return -EINVAL;
10840
10841                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10842                 if (!qos_map)
10843                         return -ENOMEM;
10844
10845                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10846                 if (num_des) {
10847                         des_len = num_des *
10848                                 sizeof(struct cfg80211_dscp_exception);
10849                         memcpy(qos_map->dscp_exception, pos, des_len);
10850                         qos_map->num_des = num_des;
10851                         for (des = 0; des < num_des; des++) {
10852                                 if (qos_map->dscp_exception[des].up > 7) {
10853                                         kfree(qos_map);
10854                                         return -EINVAL;
10855                                 }
10856                         }
10857                         pos += des_len;
10858                 }
10859                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10860         }
10861
10862         wdev_lock(dev->ieee80211_ptr);
10863         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10864         if (!ret)
10865                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10866         wdev_unlock(dev->ieee80211_ptr);
10867
10868         kfree(qos_map);
10869         return ret;
10870 }
10871
10872 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10873 {
10874         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10875         struct net_device *dev = info->user_ptr[1];
10876         struct wireless_dev *wdev = dev->ieee80211_ptr;
10877         const u8 *peer;
10878         u8 tsid, up;
10879         u16 admitted_time = 0;
10880         int err;
10881
10882         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10883                 return -EOPNOTSUPP;
10884
10885         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10886             !info->attrs[NL80211_ATTR_USER_PRIO])
10887                 return -EINVAL;
10888
10889         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10890         if (tsid >= IEEE80211_NUM_TIDS)
10891                 return -EINVAL;
10892
10893         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10894         if (up >= IEEE80211_NUM_UPS)
10895                 return -EINVAL;
10896
10897         /* WMM uses TIDs 0-7 even for TSPEC */
10898         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10899                 /* TODO: handle 802.11 TSPEC/admission control
10900                  * need more attributes for that (e.g. BA session requirement);
10901                  * change the WMM adminssion test above to allow both then
10902                  */
10903                 return -EINVAL;
10904         }
10905
10906         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10907
10908         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10909                 admitted_time =
10910                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10911                 if (!admitted_time)
10912                         return -EINVAL;
10913         }
10914
10915         wdev_lock(wdev);
10916         switch (wdev->iftype) {
10917         case NL80211_IFTYPE_STATION:
10918         case NL80211_IFTYPE_P2P_CLIENT:
10919                 if (wdev->current_bss)
10920                         break;
10921                 err = -ENOTCONN;
10922                 goto out;
10923         default:
10924                 err = -EOPNOTSUPP;
10925                 goto out;
10926         }
10927
10928         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10929
10930  out:
10931         wdev_unlock(wdev);
10932         return err;
10933 }
10934
10935 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10936 {
10937         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10938         struct net_device *dev = info->user_ptr[1];
10939         struct wireless_dev *wdev = dev->ieee80211_ptr;
10940         const u8 *peer;
10941         u8 tsid;
10942         int err;
10943
10944         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10945                 return -EINVAL;
10946
10947         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10948         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10949
10950         wdev_lock(wdev);
10951         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10952         wdev_unlock(wdev);
10953
10954         return err;
10955 }
10956
10957 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10958                                        struct genl_info *info)
10959 {
10960         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10961         struct net_device *dev = info->user_ptr[1];
10962         struct wireless_dev *wdev = dev->ieee80211_ptr;
10963         struct cfg80211_chan_def chandef = {};
10964         const u8 *addr;
10965         u8 oper_class;
10966         int err;
10967
10968         if (!rdev->ops->tdls_channel_switch ||
10969             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10970                 return -EOPNOTSUPP;
10971
10972         switch (dev->ieee80211_ptr->iftype) {
10973         case NL80211_IFTYPE_STATION:
10974         case NL80211_IFTYPE_P2P_CLIENT:
10975                 break;
10976         default:
10977                 return -EOPNOTSUPP;
10978         }
10979
10980         if (!info->attrs[NL80211_ATTR_MAC] ||
10981             !info->attrs[NL80211_ATTR_OPER_CLASS])
10982                 return -EINVAL;
10983
10984         err = nl80211_parse_chandef(rdev, info, &chandef);
10985         if (err)
10986                 return err;
10987
10988         /*
10989          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10990          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10991          * specification is not defined for them.
10992          */
10993         if (chandef.chan->band == NL80211_BAND_2GHZ &&
10994             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10995             chandef.width != NL80211_CHAN_WIDTH_20)
10996                 return -EINVAL;
10997
10998         /* we will be active on the TDLS link */
10999         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
11000                                            wdev->iftype))
11001                 return -EINVAL;
11002
11003         /* don't allow switching to DFS channels */
11004         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
11005                 return -EINVAL;
11006
11007         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11008         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
11009
11010         wdev_lock(wdev);
11011         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
11012         wdev_unlock(wdev);
11013
11014         return err;
11015 }
11016
11017 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
11018                                               struct genl_info *info)
11019 {
11020         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11021         struct net_device *dev = info->user_ptr[1];
11022         struct wireless_dev *wdev = dev->ieee80211_ptr;
11023         const u8 *addr;
11024
11025         if (!rdev->ops->tdls_channel_switch ||
11026             !rdev->ops->tdls_cancel_channel_switch ||
11027             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
11028                 return -EOPNOTSUPP;
11029
11030         switch (dev->ieee80211_ptr->iftype) {
11031         case NL80211_IFTYPE_STATION:
11032         case NL80211_IFTYPE_P2P_CLIENT:
11033                 break;
11034         default:
11035                 return -EOPNOTSUPP;
11036         }
11037
11038         if (!info->attrs[NL80211_ATTR_MAC])
11039                 return -EINVAL;
11040
11041         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
11042
11043         wdev_lock(wdev);
11044         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
11045         wdev_unlock(wdev);
11046
11047         return 0;
11048 }
11049
11050 #define NL80211_FLAG_NEED_WIPHY         0x01
11051 #define NL80211_FLAG_NEED_NETDEV        0x02
11052 #define NL80211_FLAG_NEED_RTNL          0x04
11053 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
11054 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
11055                                          NL80211_FLAG_CHECK_NETDEV_UP)
11056 #define NL80211_FLAG_NEED_WDEV          0x10
11057 /* If a netdev is associated, it must be UP, P2P must be started */
11058 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
11059                                          NL80211_FLAG_CHECK_NETDEV_UP)
11060 #define NL80211_FLAG_CLEAR_SKB          0x20
11061
11062 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
11063                             struct genl_info *info)
11064 {
11065         struct cfg80211_registered_device *rdev;
11066         struct wireless_dev *wdev;
11067         struct net_device *dev;
11068         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
11069
11070         if (rtnl)
11071                 rtnl_lock();
11072
11073         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
11074                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
11075                 if (IS_ERR(rdev)) {
11076                         if (rtnl)
11077                                 rtnl_unlock();
11078                         return PTR_ERR(rdev);
11079                 }
11080                 info->user_ptr[0] = rdev;
11081         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
11082                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11083                 ASSERT_RTNL();
11084
11085                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
11086                                                   info->attrs);
11087                 if (IS_ERR(wdev)) {
11088                         if (rtnl)
11089                                 rtnl_unlock();
11090                         return PTR_ERR(wdev);
11091                 }
11092
11093                 dev = wdev->netdev;
11094                 rdev = wiphy_to_rdev(wdev->wiphy);
11095
11096                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
11097                         if (!dev) {
11098                                 if (rtnl)
11099                                         rtnl_unlock();
11100                                 return -EINVAL;
11101                         }
11102
11103                         info->user_ptr[1] = dev;
11104                 } else {
11105                         info->user_ptr[1] = wdev;
11106                 }
11107
11108                 if (dev) {
11109                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
11110                             !netif_running(dev)) {
11111                                 if (rtnl)
11112                                         rtnl_unlock();
11113                                 return -ENETDOWN;
11114                         }
11115
11116                         dev_hold(dev);
11117                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
11118                         if (!wdev->p2p_started) {
11119                                 if (rtnl)
11120                                         rtnl_unlock();
11121                                 return -ENETDOWN;
11122                         }
11123                 }
11124
11125                 info->user_ptr[0] = rdev;
11126         }
11127
11128         return 0;
11129 }
11130
11131 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
11132                               struct genl_info *info)
11133 {
11134         if (info->user_ptr[1]) {
11135                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
11136                         struct wireless_dev *wdev = info->user_ptr[1];
11137
11138                         if (wdev->netdev)
11139                                 dev_put(wdev->netdev);
11140                 } else {
11141                         dev_put(info->user_ptr[1]);
11142                 }
11143         }
11144
11145         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
11146                 rtnl_unlock();
11147
11148         /* If needed, clear the netlink message payload from the SKB
11149          * as it might contain key data that shouldn't stick around on
11150          * the heap after the SKB is freed. The netlink message header
11151          * is still needed for further processing, so leave it intact.
11152          */
11153         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
11154                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
11155
11156                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
11157         }
11158 }
11159
11160 static const struct genl_ops nl80211_ops[] = {
11161         {
11162                 .cmd = NL80211_CMD_GET_WIPHY,
11163                 .doit = nl80211_get_wiphy,
11164                 .dumpit = nl80211_dump_wiphy,
11165                 .done = nl80211_dump_wiphy_done,
11166                 .policy = nl80211_policy,
11167                 /* can be retrieved by unprivileged users */
11168                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11169                                   NL80211_FLAG_NEED_RTNL,
11170         },
11171         {
11172                 .cmd = NL80211_CMD_SET_WIPHY,
11173                 .doit = nl80211_set_wiphy,
11174                 .policy = nl80211_policy,
11175                 .flags = GENL_UNS_ADMIN_PERM,
11176                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11177         },
11178         {
11179                 .cmd = NL80211_CMD_GET_INTERFACE,
11180                 .doit = nl80211_get_interface,
11181                 .dumpit = nl80211_dump_interface,
11182                 .policy = nl80211_policy,
11183                 /* can be retrieved by unprivileged users */
11184                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11185                                   NL80211_FLAG_NEED_RTNL,
11186         },
11187         {
11188                 .cmd = NL80211_CMD_SET_INTERFACE,
11189                 .doit = nl80211_set_interface,
11190                 .policy = nl80211_policy,
11191                 .flags = GENL_UNS_ADMIN_PERM,
11192                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11193                                   NL80211_FLAG_NEED_RTNL,
11194         },
11195         {
11196                 .cmd = NL80211_CMD_NEW_INTERFACE,
11197                 .doit = nl80211_new_interface,
11198                 .policy = nl80211_policy,
11199                 .flags = GENL_UNS_ADMIN_PERM,
11200                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11201                                   NL80211_FLAG_NEED_RTNL,
11202         },
11203         {
11204                 .cmd = NL80211_CMD_DEL_INTERFACE,
11205                 .doit = nl80211_del_interface,
11206                 .policy = nl80211_policy,
11207                 .flags = GENL_UNS_ADMIN_PERM,
11208                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11209                                   NL80211_FLAG_NEED_RTNL,
11210         },
11211         {
11212                 .cmd = NL80211_CMD_GET_KEY,
11213                 .doit = nl80211_get_key,
11214                 .policy = nl80211_policy,
11215                 .flags = GENL_UNS_ADMIN_PERM,
11216                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11217                                   NL80211_FLAG_NEED_RTNL,
11218         },
11219         {
11220                 .cmd = NL80211_CMD_SET_KEY,
11221                 .doit = nl80211_set_key,
11222                 .policy = nl80211_policy,
11223                 .flags = GENL_UNS_ADMIN_PERM,
11224                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11225                                   NL80211_FLAG_NEED_RTNL |
11226                                   NL80211_FLAG_CLEAR_SKB,
11227         },
11228         {
11229                 .cmd = NL80211_CMD_NEW_KEY,
11230                 .doit = nl80211_new_key,
11231                 .policy = nl80211_policy,
11232                 .flags = GENL_UNS_ADMIN_PERM,
11233                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11234                                   NL80211_FLAG_NEED_RTNL |
11235                                   NL80211_FLAG_CLEAR_SKB,
11236         },
11237         {
11238                 .cmd = NL80211_CMD_DEL_KEY,
11239                 .doit = nl80211_del_key,
11240                 .policy = nl80211_policy,
11241                 .flags = GENL_UNS_ADMIN_PERM,
11242                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11243                                   NL80211_FLAG_NEED_RTNL,
11244         },
11245         {
11246                 .cmd = NL80211_CMD_SET_BEACON,
11247                 .policy = nl80211_policy,
11248                 .flags = GENL_UNS_ADMIN_PERM,
11249                 .doit = nl80211_set_beacon,
11250                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11251                                   NL80211_FLAG_NEED_RTNL,
11252         },
11253         {
11254                 .cmd = NL80211_CMD_START_AP,
11255                 .policy = nl80211_policy,
11256                 .flags = GENL_UNS_ADMIN_PERM,
11257                 .doit = nl80211_start_ap,
11258                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11259                                   NL80211_FLAG_NEED_RTNL,
11260         },
11261         {
11262                 .cmd = NL80211_CMD_STOP_AP,
11263                 .policy = nl80211_policy,
11264                 .flags = GENL_UNS_ADMIN_PERM,
11265                 .doit = nl80211_stop_ap,
11266                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11267                                   NL80211_FLAG_NEED_RTNL,
11268         },
11269         {
11270                 .cmd = NL80211_CMD_GET_STATION,
11271                 .doit = nl80211_get_station,
11272                 .dumpit = nl80211_dump_station,
11273                 .policy = nl80211_policy,
11274                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11275                                   NL80211_FLAG_NEED_RTNL,
11276         },
11277         {
11278                 .cmd = NL80211_CMD_SET_STATION,
11279                 .doit = nl80211_set_station,
11280                 .policy = nl80211_policy,
11281                 .flags = GENL_UNS_ADMIN_PERM,
11282                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11283                                   NL80211_FLAG_NEED_RTNL,
11284         },
11285         {
11286                 .cmd = NL80211_CMD_NEW_STATION,
11287                 .doit = nl80211_new_station,
11288                 .policy = nl80211_policy,
11289                 .flags = GENL_UNS_ADMIN_PERM,
11290                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11291                                   NL80211_FLAG_NEED_RTNL,
11292         },
11293         {
11294                 .cmd = NL80211_CMD_DEL_STATION,
11295                 .doit = nl80211_del_station,
11296                 .policy = nl80211_policy,
11297                 .flags = GENL_UNS_ADMIN_PERM,
11298                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11299                                   NL80211_FLAG_NEED_RTNL,
11300         },
11301         {
11302                 .cmd = NL80211_CMD_GET_MPATH,
11303                 .doit = nl80211_get_mpath,
11304                 .dumpit = nl80211_dump_mpath,
11305                 .policy = nl80211_policy,
11306                 .flags = GENL_UNS_ADMIN_PERM,
11307                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11308                                   NL80211_FLAG_NEED_RTNL,
11309         },
11310         {
11311                 .cmd = NL80211_CMD_GET_MPP,
11312                 .doit = nl80211_get_mpp,
11313                 .dumpit = nl80211_dump_mpp,
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_MPATH,
11321                 .doit = nl80211_set_mpath,
11322                 .policy = nl80211_policy,
11323                 .flags = GENL_UNS_ADMIN_PERM,
11324                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11325                                   NL80211_FLAG_NEED_RTNL,
11326         },
11327         {
11328                 .cmd = NL80211_CMD_NEW_MPATH,
11329                 .doit = nl80211_new_mpath,
11330                 .policy = nl80211_policy,
11331                 .flags = GENL_UNS_ADMIN_PERM,
11332                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11333                                   NL80211_FLAG_NEED_RTNL,
11334         },
11335         {
11336                 .cmd = NL80211_CMD_DEL_MPATH,
11337                 .doit = nl80211_del_mpath,
11338                 .policy = nl80211_policy,
11339                 .flags = GENL_UNS_ADMIN_PERM,
11340                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11341                                   NL80211_FLAG_NEED_RTNL,
11342         },
11343         {
11344                 .cmd = NL80211_CMD_SET_BSS,
11345                 .doit = nl80211_set_bss,
11346                 .policy = nl80211_policy,
11347                 .flags = GENL_UNS_ADMIN_PERM,
11348                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11349                                   NL80211_FLAG_NEED_RTNL,
11350         },
11351         {
11352                 .cmd = NL80211_CMD_GET_REG,
11353                 .doit = nl80211_get_reg_do,
11354                 .dumpit = nl80211_get_reg_dump,
11355                 .policy = nl80211_policy,
11356                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11357                 /* can be retrieved by unprivileged users */
11358         },
11359 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
11360         {
11361                 .cmd = NL80211_CMD_SET_REG,
11362                 .doit = nl80211_set_reg,
11363                 .policy = nl80211_policy,
11364                 .flags = GENL_ADMIN_PERM,
11365                 .internal_flags = NL80211_FLAG_NEED_RTNL,
11366         },
11367 #endif
11368         {
11369                 .cmd = NL80211_CMD_REQ_SET_REG,
11370                 .doit = nl80211_req_set_reg,
11371                 .policy = nl80211_policy,
11372                 .flags = GENL_ADMIN_PERM,
11373         },
11374         {
11375                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
11376                 .doit = nl80211_get_mesh_config,
11377                 .policy = nl80211_policy,
11378                 /* can be retrieved by unprivileged users */
11379                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11380                                   NL80211_FLAG_NEED_RTNL,
11381         },
11382         {
11383                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
11384                 .doit = nl80211_update_mesh_config,
11385                 .policy = nl80211_policy,
11386                 .flags = GENL_UNS_ADMIN_PERM,
11387                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11388                                   NL80211_FLAG_NEED_RTNL,
11389         },
11390         {
11391                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11392                 .doit = nl80211_trigger_scan,
11393                 .policy = nl80211_policy,
11394                 .flags = GENL_UNS_ADMIN_PERM,
11395                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11396                                   NL80211_FLAG_NEED_RTNL,
11397         },
11398         {
11399                 .cmd = NL80211_CMD_ABORT_SCAN,
11400                 .doit = nl80211_abort_scan,
11401                 .policy = nl80211_policy,
11402                 .flags = GENL_UNS_ADMIN_PERM,
11403                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11404                                   NL80211_FLAG_NEED_RTNL,
11405         },
11406         {
11407                 .cmd = NL80211_CMD_GET_SCAN,
11408                 .policy = nl80211_policy,
11409                 .dumpit = nl80211_dump_scan,
11410         },
11411         {
11412                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11413                 .doit = nl80211_start_sched_scan,
11414                 .policy = nl80211_policy,
11415                 .flags = GENL_UNS_ADMIN_PERM,
11416                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11417                                   NL80211_FLAG_NEED_RTNL,
11418         },
11419         {
11420                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11421                 .doit = nl80211_stop_sched_scan,
11422                 .policy = nl80211_policy,
11423                 .flags = GENL_UNS_ADMIN_PERM,
11424                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11425                                   NL80211_FLAG_NEED_RTNL,
11426         },
11427         {
11428                 .cmd = NL80211_CMD_AUTHENTICATE,
11429                 .doit = nl80211_authenticate,
11430                 .policy = nl80211_policy,
11431                 .flags = GENL_UNS_ADMIN_PERM,
11432                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11433                                   NL80211_FLAG_NEED_RTNL |
11434                                   NL80211_FLAG_CLEAR_SKB,
11435         },
11436         {
11437                 .cmd = NL80211_CMD_ASSOCIATE,
11438                 .doit = nl80211_associate,
11439                 .policy = nl80211_policy,
11440                 .flags = GENL_UNS_ADMIN_PERM,
11441                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11442                                   NL80211_FLAG_NEED_RTNL,
11443         },
11444         {
11445                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11446                 .doit = nl80211_deauthenticate,
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_DISASSOCIATE,
11454                 .doit = nl80211_disassociate,
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_IBSS,
11462                 .doit = nl80211_join_ibss,
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_IBSS,
11470                 .doit = nl80211_leave_ibss,
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_NL80211_TESTMODE
11477         {
11478                 .cmd = NL80211_CMD_TESTMODE,
11479                 .doit = nl80211_testmode_do,
11480                 .dumpit = nl80211_testmode_dump,
11481                 .policy = nl80211_policy,
11482                 .flags = GENL_UNS_ADMIN_PERM,
11483                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11484                                   NL80211_FLAG_NEED_RTNL,
11485         },
11486 #endif
11487         {
11488                 .cmd = NL80211_CMD_CONNECT,
11489                 .doit = nl80211_connect,
11490                 .policy = nl80211_policy,
11491                 .flags = GENL_UNS_ADMIN_PERM,
11492                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11493                                   NL80211_FLAG_NEED_RTNL,
11494         },
11495         {
11496                 .cmd = NL80211_CMD_DISCONNECT,
11497                 .doit = nl80211_disconnect,
11498                 .policy = nl80211_policy,
11499                 .flags = GENL_UNS_ADMIN_PERM,
11500                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11501                                   NL80211_FLAG_NEED_RTNL,
11502         },
11503         {
11504                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11505                 .doit = nl80211_wiphy_netns,
11506                 .policy = nl80211_policy,
11507                 .flags = GENL_UNS_ADMIN_PERM,
11508                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11509                                   NL80211_FLAG_NEED_RTNL,
11510         },
11511         {
11512                 .cmd = NL80211_CMD_GET_SURVEY,
11513                 .policy = nl80211_policy,
11514                 .dumpit = nl80211_dump_survey,
11515         },
11516         {
11517                 .cmd = NL80211_CMD_SET_PMKSA,
11518                 .doit = nl80211_setdel_pmksa,
11519                 .policy = nl80211_policy,
11520                 .flags = GENL_UNS_ADMIN_PERM,
11521                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11522                                   NL80211_FLAG_NEED_RTNL,
11523         },
11524         {
11525                 .cmd = NL80211_CMD_DEL_PMKSA,
11526                 .doit = nl80211_setdel_pmksa,
11527                 .policy = nl80211_policy,
11528                 .flags = GENL_UNS_ADMIN_PERM,
11529                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11530                                   NL80211_FLAG_NEED_RTNL,
11531         },
11532         {
11533                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11534                 .doit = nl80211_flush_pmksa,
11535                 .policy = nl80211_policy,
11536                 .flags = GENL_UNS_ADMIN_PERM,
11537                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11538                                   NL80211_FLAG_NEED_RTNL,
11539         },
11540         {
11541                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11542                 .doit = nl80211_remain_on_channel,
11543                 .policy = nl80211_policy,
11544                 .flags = GENL_UNS_ADMIN_PERM,
11545                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11546                                   NL80211_FLAG_NEED_RTNL,
11547         },
11548         {
11549                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11550                 .doit = nl80211_cancel_remain_on_channel,
11551                 .policy = nl80211_policy,
11552                 .flags = GENL_UNS_ADMIN_PERM,
11553                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11554                                   NL80211_FLAG_NEED_RTNL,
11555         },
11556         {
11557                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11558                 .doit = nl80211_set_tx_bitrate_mask,
11559                 .policy = nl80211_policy,
11560                 .flags = GENL_UNS_ADMIN_PERM,
11561                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11562                                   NL80211_FLAG_NEED_RTNL,
11563         },
11564         {
11565                 .cmd = NL80211_CMD_REGISTER_FRAME,
11566                 .doit = nl80211_register_mgmt,
11567                 .policy = nl80211_policy,
11568                 .flags = GENL_UNS_ADMIN_PERM,
11569                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11570                                   NL80211_FLAG_NEED_RTNL,
11571         },
11572         {
11573                 .cmd = NL80211_CMD_FRAME,
11574                 .doit = nl80211_tx_mgmt,
11575                 .policy = nl80211_policy,
11576                 .flags = GENL_UNS_ADMIN_PERM,
11577                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11578                                   NL80211_FLAG_NEED_RTNL,
11579         },
11580         {
11581                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11582                 .doit = nl80211_tx_mgmt_cancel_wait,
11583                 .policy = nl80211_policy,
11584                 .flags = GENL_UNS_ADMIN_PERM,
11585                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11586                                   NL80211_FLAG_NEED_RTNL,
11587         },
11588         {
11589                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11590                 .doit = nl80211_set_power_save,
11591                 .policy = nl80211_policy,
11592                 .flags = GENL_UNS_ADMIN_PERM,
11593                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11594                                   NL80211_FLAG_NEED_RTNL,
11595         },
11596         {
11597                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11598                 .doit = nl80211_get_power_save,
11599                 .policy = nl80211_policy,
11600                 /* can be retrieved by unprivileged users */
11601                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11602                                   NL80211_FLAG_NEED_RTNL,
11603         },
11604         {
11605                 .cmd = NL80211_CMD_SET_CQM,
11606                 .doit = nl80211_set_cqm,
11607                 .policy = nl80211_policy,
11608                 .flags = GENL_UNS_ADMIN_PERM,
11609                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11610                                   NL80211_FLAG_NEED_RTNL,
11611         },
11612         {
11613                 .cmd = NL80211_CMD_SET_CHANNEL,
11614                 .doit = nl80211_set_channel,
11615                 .policy = nl80211_policy,
11616                 .flags = GENL_UNS_ADMIN_PERM,
11617                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11618                                   NL80211_FLAG_NEED_RTNL,
11619         },
11620         {
11621                 .cmd = NL80211_CMD_SET_WDS_PEER,
11622                 .doit = nl80211_set_wds_peer,
11623                 .policy = nl80211_policy,
11624                 .flags = GENL_UNS_ADMIN_PERM,
11625                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11626                                   NL80211_FLAG_NEED_RTNL,
11627         },
11628         {
11629                 .cmd = NL80211_CMD_JOIN_MESH,
11630                 .doit = nl80211_join_mesh,
11631                 .policy = nl80211_policy,
11632                 .flags = GENL_UNS_ADMIN_PERM,
11633                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11634                                   NL80211_FLAG_NEED_RTNL,
11635         },
11636         {
11637                 .cmd = NL80211_CMD_LEAVE_MESH,
11638                 .doit = nl80211_leave_mesh,
11639                 .policy = nl80211_policy,
11640                 .flags = GENL_UNS_ADMIN_PERM,
11641                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11642                                   NL80211_FLAG_NEED_RTNL,
11643         },
11644         {
11645                 .cmd = NL80211_CMD_JOIN_OCB,
11646                 .doit = nl80211_join_ocb,
11647                 .policy = nl80211_policy,
11648                 .flags = GENL_UNS_ADMIN_PERM,
11649                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11650                                   NL80211_FLAG_NEED_RTNL,
11651         },
11652         {
11653                 .cmd = NL80211_CMD_LEAVE_OCB,
11654                 .doit = nl80211_leave_ocb,
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 #ifdef CONFIG_PM
11661         {
11662                 .cmd = NL80211_CMD_GET_WOWLAN,
11663                 .doit = nl80211_get_wowlan,
11664                 .policy = nl80211_policy,
11665                 /* can be retrieved by unprivileged users */
11666                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11667                                   NL80211_FLAG_NEED_RTNL,
11668         },
11669         {
11670                 .cmd = NL80211_CMD_SET_WOWLAN,
11671                 .doit = nl80211_set_wowlan,
11672                 .policy = nl80211_policy,
11673                 .flags = GENL_UNS_ADMIN_PERM,
11674                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11675                                   NL80211_FLAG_NEED_RTNL,
11676         },
11677 #endif
11678         {
11679                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11680                 .doit = nl80211_set_rekey_data,
11681                 .policy = nl80211_policy,
11682                 .flags = GENL_UNS_ADMIN_PERM,
11683                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11684                                   NL80211_FLAG_NEED_RTNL |
11685                                   NL80211_FLAG_CLEAR_SKB,
11686         },
11687         {
11688                 .cmd = NL80211_CMD_TDLS_MGMT,
11689                 .doit = nl80211_tdls_mgmt,
11690                 .policy = nl80211_policy,
11691                 .flags = GENL_UNS_ADMIN_PERM,
11692                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11693                                   NL80211_FLAG_NEED_RTNL,
11694         },
11695         {
11696                 .cmd = NL80211_CMD_TDLS_OPER,
11697                 .doit = nl80211_tdls_oper,
11698                 .policy = nl80211_policy,
11699                 .flags = GENL_UNS_ADMIN_PERM,
11700                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11701                                   NL80211_FLAG_NEED_RTNL,
11702         },
11703         {
11704                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11705                 .doit = nl80211_register_unexpected_frame,
11706                 .policy = nl80211_policy,
11707                 .flags = GENL_UNS_ADMIN_PERM,
11708                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11709                                   NL80211_FLAG_NEED_RTNL,
11710         },
11711         {
11712                 .cmd = NL80211_CMD_PROBE_CLIENT,
11713                 .doit = nl80211_probe_client,
11714                 .policy = nl80211_policy,
11715                 .flags = GENL_UNS_ADMIN_PERM,
11716                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11717                                   NL80211_FLAG_NEED_RTNL,
11718         },
11719         {
11720                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11721                 .doit = nl80211_register_beacons,
11722                 .policy = nl80211_policy,
11723                 .flags = GENL_UNS_ADMIN_PERM,
11724                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11725                                   NL80211_FLAG_NEED_RTNL,
11726         },
11727         {
11728                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11729                 .doit = nl80211_set_noack_map,
11730                 .policy = nl80211_policy,
11731                 .flags = GENL_UNS_ADMIN_PERM,
11732                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11733                                   NL80211_FLAG_NEED_RTNL,
11734         },
11735         {
11736                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11737                 .doit = nl80211_start_p2p_device,
11738                 .policy = nl80211_policy,
11739                 .flags = GENL_UNS_ADMIN_PERM,
11740                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11741                                   NL80211_FLAG_NEED_RTNL,
11742         },
11743         {
11744                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11745                 .doit = nl80211_stop_p2p_device,
11746                 .policy = nl80211_policy,
11747                 .flags = GENL_UNS_ADMIN_PERM,
11748                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11749                                   NL80211_FLAG_NEED_RTNL,
11750         },
11751         {
11752                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11753                 .doit = nl80211_set_mcast_rate,
11754                 .policy = nl80211_policy,
11755                 .flags = GENL_UNS_ADMIN_PERM,
11756                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11757                                   NL80211_FLAG_NEED_RTNL,
11758         },
11759         {
11760                 .cmd = NL80211_CMD_SET_MAC_ACL,
11761                 .doit = nl80211_set_mac_acl,
11762                 .policy = nl80211_policy,
11763                 .flags = GENL_UNS_ADMIN_PERM,
11764                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11765                                   NL80211_FLAG_NEED_RTNL,
11766         },
11767         {
11768                 .cmd = NL80211_CMD_RADAR_DETECT,
11769                 .doit = nl80211_start_radar_detection,
11770                 .policy = nl80211_policy,
11771                 .flags = GENL_UNS_ADMIN_PERM,
11772                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11773                                   NL80211_FLAG_NEED_RTNL,
11774         },
11775         {
11776                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11777                 .doit = nl80211_get_protocol_features,
11778                 .policy = nl80211_policy,
11779         },
11780         {
11781                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11782                 .doit = nl80211_update_ft_ies,
11783                 .policy = nl80211_policy,
11784                 .flags = GENL_UNS_ADMIN_PERM,
11785                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11786                                   NL80211_FLAG_NEED_RTNL,
11787         },
11788         {
11789                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11790                 .doit = nl80211_crit_protocol_start,
11791                 .policy = nl80211_policy,
11792                 .flags = GENL_UNS_ADMIN_PERM,
11793                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11794                                   NL80211_FLAG_NEED_RTNL,
11795         },
11796         {
11797                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11798                 .doit = nl80211_crit_protocol_stop,
11799                 .policy = nl80211_policy,
11800                 .flags = GENL_UNS_ADMIN_PERM,
11801                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11802                                   NL80211_FLAG_NEED_RTNL,
11803         },
11804         {
11805                 .cmd = NL80211_CMD_GET_COALESCE,
11806                 .doit = nl80211_get_coalesce,
11807                 .policy = nl80211_policy,
11808                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11809                                   NL80211_FLAG_NEED_RTNL,
11810         },
11811         {
11812                 .cmd = NL80211_CMD_SET_COALESCE,
11813                 .doit = nl80211_set_coalesce,
11814                 .policy = nl80211_policy,
11815                 .flags = GENL_UNS_ADMIN_PERM,
11816                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11817                                   NL80211_FLAG_NEED_RTNL,
11818         },
11819         {
11820                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11821                 .doit = nl80211_channel_switch,
11822                 .policy = nl80211_policy,
11823                 .flags = GENL_UNS_ADMIN_PERM,
11824                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11825                                   NL80211_FLAG_NEED_RTNL,
11826         },
11827         {
11828                 .cmd = NL80211_CMD_VENDOR,
11829                 .doit = nl80211_vendor_cmd,
11830                 .dumpit = nl80211_vendor_cmd_dump,
11831                 .policy = nl80211_policy,
11832                 .flags = GENL_UNS_ADMIN_PERM,
11833                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11834                                   NL80211_FLAG_NEED_RTNL,
11835         },
11836         {
11837                 .cmd = NL80211_CMD_SET_QOS_MAP,
11838                 .doit = nl80211_set_qos_map,
11839                 .policy = nl80211_policy,
11840                 .flags = GENL_UNS_ADMIN_PERM,
11841                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11842                                   NL80211_FLAG_NEED_RTNL,
11843         },
11844         {
11845                 .cmd = NL80211_CMD_ADD_TX_TS,
11846                 .doit = nl80211_add_tx_ts,
11847                 .policy = nl80211_policy,
11848                 .flags = GENL_UNS_ADMIN_PERM,
11849                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11850                                   NL80211_FLAG_NEED_RTNL,
11851         },
11852         {
11853                 .cmd = NL80211_CMD_DEL_TX_TS,
11854                 .doit = nl80211_del_tx_ts,
11855                 .policy = nl80211_policy,
11856                 .flags = GENL_UNS_ADMIN_PERM,
11857                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11858                                   NL80211_FLAG_NEED_RTNL,
11859         },
11860         {
11861                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11862                 .doit = nl80211_tdls_channel_switch,
11863                 .policy = nl80211_policy,
11864                 .flags = GENL_UNS_ADMIN_PERM,
11865                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11866                                   NL80211_FLAG_NEED_RTNL,
11867         },
11868         {
11869                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11870                 .doit = nl80211_tdls_cancel_channel_switch,
11871                 .policy = nl80211_policy,
11872                 .flags = GENL_UNS_ADMIN_PERM,
11873                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11874                                   NL80211_FLAG_NEED_RTNL,
11875         },
11876 };
11877
11878 /* notification functions */
11879
11880 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11881                           enum nl80211_commands cmd)
11882 {
11883         struct sk_buff *msg;
11884         struct nl80211_dump_wiphy_state state = {};
11885
11886         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11887                 cmd != NL80211_CMD_DEL_WIPHY);
11888
11889         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11890         if (!msg)
11891                 return;
11892
11893         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11894                 nlmsg_free(msg);
11895                 return;
11896         }
11897
11898         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11899                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11900 }
11901
11902 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
11903                                 struct wireless_dev *wdev,
11904                                 enum nl80211_commands cmd)
11905 {
11906         struct sk_buff *msg;
11907
11908         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
11909                 cmd != NL80211_CMD_DEL_INTERFACE);
11910
11911         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11912         if (!msg)
11913                 return;
11914
11915         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
11916                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
11917                 nlmsg_free(msg);
11918                 return;
11919         }
11920
11921         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11922                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11923 }
11924
11925 static int nl80211_add_scan_req(struct sk_buff *msg,
11926                                 struct cfg80211_registered_device *rdev)
11927 {
11928         struct cfg80211_scan_request *req = rdev->scan_req;
11929         struct nlattr *nest;
11930         int i;
11931
11932         if (WARN_ON(!req))
11933                 return 0;
11934
11935         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11936         if (!nest)
11937                 goto nla_put_failure;
11938         for (i = 0; i < req->n_ssids; i++) {
11939                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11940                         goto nla_put_failure;
11941         }
11942         nla_nest_end(msg, nest);
11943
11944         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11945         if (!nest)
11946                 goto nla_put_failure;
11947         for (i = 0; i < req->n_channels; i++) {
11948                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11949                         goto nla_put_failure;
11950         }
11951         nla_nest_end(msg, nest);
11952
11953         if (req->ie &&
11954             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11955                 goto nla_put_failure;
11956
11957         if (req->flags &&
11958             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11959                 goto nla_put_failure;
11960
11961         if (req->info.scan_start_tsf &&
11962             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
11963                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
11964              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
11965                      req->info.tsf_bssid)))
11966                 goto nla_put_failure;
11967
11968         return 0;
11969  nla_put_failure:
11970         return -ENOBUFS;
11971 }
11972
11973 static int nl80211_send_scan_msg(struct sk_buff *msg,
11974                                  struct cfg80211_registered_device *rdev,
11975                                  struct wireless_dev *wdev,
11976                                  u32 portid, u32 seq, int flags,
11977                                  u32 cmd)
11978 {
11979         void *hdr;
11980
11981         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11982         if (!hdr)
11983                 return -1;
11984
11985         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11986             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11987                                          wdev->netdev->ifindex)) ||
11988             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11989                               NL80211_ATTR_PAD))
11990                 goto nla_put_failure;
11991
11992         /* ignore errors and send incomplete event anyway */
11993         nl80211_add_scan_req(msg, rdev);
11994
11995         genlmsg_end(msg, hdr);
11996         return 0;
11997
11998  nla_put_failure:
11999         genlmsg_cancel(msg, hdr);
12000         return -EMSGSIZE;
12001 }
12002
12003 static int
12004 nl80211_send_sched_scan_msg(struct sk_buff *msg,
12005                             struct cfg80211_registered_device *rdev,
12006                             struct net_device *netdev,
12007                             u32 portid, u32 seq, int flags, u32 cmd)
12008 {
12009         void *hdr;
12010
12011         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
12012         if (!hdr)
12013                 return -1;
12014
12015         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12016             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12017                 goto nla_put_failure;
12018
12019         genlmsg_end(msg, hdr);
12020         return 0;
12021
12022  nla_put_failure:
12023         genlmsg_cancel(msg, hdr);
12024         return -EMSGSIZE;
12025 }
12026
12027 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
12028                              struct wireless_dev *wdev)
12029 {
12030         struct sk_buff *msg;
12031
12032         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12033         if (!msg)
12034                 return;
12035
12036         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
12037                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
12038                 nlmsg_free(msg);
12039                 return;
12040         }
12041
12042         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12043                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12044 }
12045
12046 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
12047                                        struct wireless_dev *wdev, bool aborted)
12048 {
12049         struct sk_buff *msg;
12050
12051         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12052         if (!msg)
12053                 return NULL;
12054
12055         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
12056                                   aborted ? NL80211_CMD_SCAN_ABORTED :
12057                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
12058                 nlmsg_free(msg);
12059                 return NULL;
12060         }
12061
12062         return msg;
12063 }
12064
12065 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
12066                               struct sk_buff *msg)
12067 {
12068         if (!msg)
12069                 return;
12070
12071         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12072                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12073 }
12074
12075 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
12076                                      struct net_device *netdev)
12077 {
12078         struct sk_buff *msg;
12079
12080         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12081         if (!msg)
12082                 return;
12083
12084         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
12085                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
12086                 nlmsg_free(msg);
12087                 return;
12088         }
12089
12090         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12091                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12092 }
12093
12094 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
12095                              struct net_device *netdev, u32 cmd)
12096 {
12097         struct sk_buff *msg;
12098
12099         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12100         if (!msg)
12101                 return;
12102
12103         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
12104                 nlmsg_free(msg);
12105                 return;
12106         }
12107
12108         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12109                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
12110 }
12111
12112 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
12113                                           struct regulatory_request *request)
12114 {
12115         /* Userspace can always count this one always being set */
12116         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
12117                 goto nla_put_failure;
12118
12119         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
12120                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12121                                NL80211_REGDOM_TYPE_WORLD))
12122                         goto nla_put_failure;
12123         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
12124                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12125                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
12126                         goto nla_put_failure;
12127         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
12128                    request->intersect) {
12129                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12130                                NL80211_REGDOM_TYPE_INTERSECTION))
12131                         goto nla_put_failure;
12132         } else {
12133                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
12134                                NL80211_REGDOM_TYPE_COUNTRY) ||
12135                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
12136                                    request->alpha2))
12137                         goto nla_put_failure;
12138         }
12139
12140         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
12141                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
12142
12143                 if (wiphy &&
12144                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
12145                         goto nla_put_failure;
12146
12147                 if (wiphy &&
12148                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
12149                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
12150                         goto nla_put_failure;
12151         }
12152
12153         return true;
12154
12155 nla_put_failure:
12156         return false;
12157 }
12158
12159 /*
12160  * This can happen on global regulatory changes or device specific settings
12161  * based on custom regulatory domains.
12162  */
12163 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
12164                                      struct regulatory_request *request)
12165 {
12166         struct sk_buff *msg;
12167         void *hdr;
12168
12169         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12170         if (!msg)
12171                 return;
12172
12173         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
12174         if (!hdr) {
12175                 nlmsg_free(msg);
12176                 return;
12177         }
12178
12179         if (nl80211_reg_change_event_fill(msg, request) == false)
12180                 goto nla_put_failure;
12181
12182         genlmsg_end(msg, hdr);
12183
12184         rcu_read_lock();
12185         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12186                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12187         rcu_read_unlock();
12188
12189         return;
12190
12191 nla_put_failure:
12192         genlmsg_cancel(msg, hdr);
12193         nlmsg_free(msg);
12194 }
12195
12196 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
12197                                     struct net_device *netdev,
12198                                     const u8 *buf, size_t len,
12199                                     enum nl80211_commands cmd, gfp_t gfp,
12200                                     int uapsd_queues)
12201 {
12202         struct sk_buff *msg;
12203         void *hdr;
12204
12205         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12206         if (!msg)
12207                 return;
12208
12209         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12210         if (!hdr) {
12211                 nlmsg_free(msg);
12212                 return;
12213         }
12214
12215         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12216             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12217             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
12218                 goto nla_put_failure;
12219
12220         if (uapsd_queues >= 0) {
12221                 struct nlattr *nla_wmm =
12222                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
12223                 if (!nla_wmm)
12224                         goto nla_put_failure;
12225
12226                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
12227                                uapsd_queues))
12228                         goto nla_put_failure;
12229
12230                 nla_nest_end(msg, nla_wmm);
12231         }
12232
12233         genlmsg_end(msg, hdr);
12234
12235         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12236                                 NL80211_MCGRP_MLME, gfp);
12237         return;
12238
12239  nla_put_failure:
12240         genlmsg_cancel(msg, hdr);
12241         nlmsg_free(msg);
12242 }
12243
12244 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
12245                           struct net_device *netdev, const u8 *buf,
12246                           size_t len, gfp_t gfp)
12247 {
12248         nl80211_send_mlme_event(rdev, netdev, buf, len,
12249                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
12250 }
12251
12252 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
12253                            struct net_device *netdev, const u8 *buf,
12254                            size_t len, gfp_t gfp, int uapsd_queues)
12255 {
12256         nl80211_send_mlme_event(rdev, netdev, buf, len,
12257                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
12258 }
12259
12260 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
12261                          struct net_device *netdev, const u8 *buf,
12262                          size_t len, gfp_t gfp)
12263 {
12264         nl80211_send_mlme_event(rdev, netdev, buf, len,
12265                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
12266 }
12267
12268 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
12269                            struct net_device *netdev, const u8 *buf,
12270                            size_t len, gfp_t gfp)
12271 {
12272         nl80211_send_mlme_event(rdev, netdev, buf, len,
12273                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
12274 }
12275
12276 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
12277                                   size_t len)
12278 {
12279         struct wireless_dev *wdev = dev->ieee80211_ptr;
12280         struct wiphy *wiphy = wdev->wiphy;
12281         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12282         const struct ieee80211_mgmt *mgmt = (void *)buf;
12283         u32 cmd;
12284
12285         if (WARN_ON(len < 2))
12286                 return;
12287
12288         if (ieee80211_is_deauth(mgmt->frame_control))
12289                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
12290         else
12291                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
12292
12293         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
12294         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
12295 }
12296 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
12297
12298 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
12299                                       struct net_device *netdev, int cmd,
12300                                       const u8 *addr, gfp_t gfp)
12301 {
12302         struct sk_buff *msg;
12303         void *hdr;
12304
12305         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12306         if (!msg)
12307                 return;
12308
12309         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12310         if (!hdr) {
12311                 nlmsg_free(msg);
12312                 return;
12313         }
12314
12315         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12316             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12317             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
12318             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12319                 goto nla_put_failure;
12320
12321         genlmsg_end(msg, hdr);
12322
12323         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12324                                 NL80211_MCGRP_MLME, gfp);
12325         return;
12326
12327  nla_put_failure:
12328         genlmsg_cancel(msg, hdr);
12329         nlmsg_free(msg);
12330 }
12331
12332 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
12333                                struct net_device *netdev, const u8 *addr,
12334                                gfp_t gfp)
12335 {
12336         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
12337                                   addr, gfp);
12338 }
12339
12340 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
12341                                 struct net_device *netdev, const u8 *addr,
12342                                 gfp_t gfp)
12343 {
12344         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
12345                                   addr, gfp);
12346 }
12347
12348 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
12349                                  struct net_device *netdev, const u8 *bssid,
12350                                  const u8 *req_ie, size_t req_ie_len,
12351                                  const u8 *resp_ie, size_t resp_ie_len,
12352                                  int status, gfp_t gfp)
12353 {
12354         struct sk_buff *msg;
12355         void *hdr;
12356
12357         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12358         if (!msg)
12359                 return;
12360
12361         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
12362         if (!hdr) {
12363                 nlmsg_free(msg);
12364                 return;
12365         }
12366
12367         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12368             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12369             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
12370             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
12371                         status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
12372                         status) ||
12373             (status < 0 && nla_put_flag(msg, NL80211_ATTR_TIMED_OUT)) ||
12374             (req_ie &&
12375              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12376             (resp_ie &&
12377              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12378                 goto nla_put_failure;
12379
12380         genlmsg_end(msg, hdr);
12381
12382         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12383                                 NL80211_MCGRP_MLME, gfp);
12384         return;
12385
12386  nla_put_failure:
12387         genlmsg_cancel(msg, hdr);
12388         nlmsg_free(msg);
12389 }
12390
12391 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
12392                          struct net_device *netdev, const u8 *bssid,
12393                          const u8 *req_ie, size_t req_ie_len,
12394                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
12395 {
12396         struct sk_buff *msg;
12397         void *hdr;
12398
12399         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12400         if (!msg)
12401                 return;
12402
12403         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
12404         if (!hdr) {
12405                 nlmsg_free(msg);
12406                 return;
12407         }
12408
12409         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12410             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12411             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
12412             (req_ie &&
12413              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
12414             (resp_ie &&
12415              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
12416                 goto nla_put_failure;
12417
12418         genlmsg_end(msg, hdr);
12419
12420         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12421                                 NL80211_MCGRP_MLME, gfp);
12422         return;
12423
12424  nla_put_failure:
12425         genlmsg_cancel(msg, hdr);
12426         nlmsg_free(msg);
12427 }
12428
12429 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
12430                                struct net_device *netdev, u16 reason,
12431                                const u8 *ie, size_t ie_len, bool from_ap)
12432 {
12433         struct sk_buff *msg;
12434         void *hdr;
12435
12436         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
12437         if (!msg)
12438                 return;
12439
12440         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12441         if (!hdr) {
12442                 nlmsg_free(msg);
12443                 return;
12444         }
12445
12446         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12447             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12448             (from_ap && reason &&
12449              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12450             (from_ap &&
12451              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12452             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
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_KERNEL);
12459         return;
12460
12461  nla_put_failure:
12462         genlmsg_cancel(msg, hdr);
12463         nlmsg_free(msg);
12464 }
12465
12466 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12467                              struct net_device *netdev, const u8 *bssid,
12468                              gfp_t gfp)
12469 {
12470         struct sk_buff *msg;
12471         void *hdr;
12472
12473         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12474         if (!msg)
12475                 return;
12476
12477         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12478         if (!hdr) {
12479                 nlmsg_free(msg);
12480                 return;
12481         }
12482
12483         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12484             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12485             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12486                 goto nla_put_failure;
12487
12488         genlmsg_end(msg, hdr);
12489
12490         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12491                                 NL80211_MCGRP_MLME, gfp);
12492         return;
12493
12494  nla_put_failure:
12495         genlmsg_cancel(msg, hdr);
12496         nlmsg_free(msg);
12497 }
12498
12499 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12500                                         const u8* ie, u8 ie_len, gfp_t gfp)
12501 {
12502         struct wireless_dev *wdev = dev->ieee80211_ptr;
12503         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12504         struct sk_buff *msg;
12505         void *hdr;
12506
12507         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12508                 return;
12509
12510         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12511
12512         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12513         if (!msg)
12514                 return;
12515
12516         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12517         if (!hdr) {
12518                 nlmsg_free(msg);
12519                 return;
12520         }
12521
12522         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12523             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12524             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12525             (ie_len && ie &&
12526              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12527                 goto nla_put_failure;
12528
12529         genlmsg_end(msg, hdr);
12530
12531         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12532                                 NL80211_MCGRP_MLME, gfp);
12533         return;
12534
12535  nla_put_failure:
12536         genlmsg_cancel(msg, hdr);
12537         nlmsg_free(msg);
12538 }
12539 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12540
12541 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12542                                  struct net_device *netdev, const u8 *addr,
12543                                  enum nl80211_key_type key_type, int key_id,
12544                                  const u8 *tsc, gfp_t gfp)
12545 {
12546         struct sk_buff *msg;
12547         void *hdr;
12548
12549         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12550         if (!msg)
12551                 return;
12552
12553         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12554         if (!hdr) {
12555                 nlmsg_free(msg);
12556                 return;
12557         }
12558
12559         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12560             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12561             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12562             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12563             (key_id != -1 &&
12564              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12565             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12566                 goto nla_put_failure;
12567
12568         genlmsg_end(msg, hdr);
12569
12570         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12571                                 NL80211_MCGRP_MLME, gfp);
12572         return;
12573
12574  nla_put_failure:
12575         genlmsg_cancel(msg, hdr);
12576         nlmsg_free(msg);
12577 }
12578
12579 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12580                                     struct ieee80211_channel *channel_before,
12581                                     struct ieee80211_channel *channel_after)
12582 {
12583         struct sk_buff *msg;
12584         void *hdr;
12585         struct nlattr *nl_freq;
12586
12587         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12588         if (!msg)
12589                 return;
12590
12591         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12592         if (!hdr) {
12593                 nlmsg_free(msg);
12594                 return;
12595         }
12596
12597         /*
12598          * Since we are applying the beacon hint to a wiphy we know its
12599          * wiphy_idx is valid
12600          */
12601         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12602                 goto nla_put_failure;
12603
12604         /* Before */
12605         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12606         if (!nl_freq)
12607                 goto nla_put_failure;
12608         if (nl80211_msg_put_channel(msg, channel_before, false))
12609                 goto nla_put_failure;
12610         nla_nest_end(msg, nl_freq);
12611
12612         /* After */
12613         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12614         if (!nl_freq)
12615                 goto nla_put_failure;
12616         if (nl80211_msg_put_channel(msg, channel_after, false))
12617                 goto nla_put_failure;
12618         nla_nest_end(msg, nl_freq);
12619
12620         genlmsg_end(msg, hdr);
12621
12622         rcu_read_lock();
12623         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12624                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12625         rcu_read_unlock();
12626
12627         return;
12628
12629 nla_put_failure:
12630         genlmsg_cancel(msg, hdr);
12631         nlmsg_free(msg);
12632 }
12633
12634 static void nl80211_send_remain_on_chan_event(
12635         int cmd, struct cfg80211_registered_device *rdev,
12636         struct wireless_dev *wdev, u64 cookie,
12637         struct ieee80211_channel *chan,
12638         unsigned int duration, gfp_t gfp)
12639 {
12640         struct sk_buff *msg;
12641         void *hdr;
12642
12643         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12644         if (!msg)
12645                 return;
12646
12647         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12648         if (!hdr) {
12649                 nlmsg_free(msg);
12650                 return;
12651         }
12652
12653         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12654             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12655                                          wdev->netdev->ifindex)) ||
12656             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12657                               NL80211_ATTR_PAD) ||
12658             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12659             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12660                         NL80211_CHAN_NO_HT) ||
12661             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12662                               NL80211_ATTR_PAD))
12663                 goto nla_put_failure;
12664
12665         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12666             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12667                 goto nla_put_failure;
12668
12669         genlmsg_end(msg, hdr);
12670
12671         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12672                                 NL80211_MCGRP_MLME, gfp);
12673         return;
12674
12675  nla_put_failure:
12676         genlmsg_cancel(msg, hdr);
12677         nlmsg_free(msg);
12678 }
12679
12680 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12681                                struct ieee80211_channel *chan,
12682                                unsigned int duration, gfp_t gfp)
12683 {
12684         struct wiphy *wiphy = wdev->wiphy;
12685         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12686
12687         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12688         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12689                                           rdev, wdev, cookie, chan,
12690                                           duration, gfp);
12691 }
12692 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12693
12694 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12695                                         struct ieee80211_channel *chan,
12696                                         gfp_t gfp)
12697 {
12698         struct wiphy *wiphy = wdev->wiphy;
12699         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12700
12701         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12702         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12703                                           rdev, wdev, cookie, chan, 0, gfp);
12704 }
12705 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12706
12707 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12708                       struct station_info *sinfo, gfp_t gfp)
12709 {
12710         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12711         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12712         struct sk_buff *msg;
12713
12714         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12715
12716         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12717         if (!msg)
12718                 return;
12719
12720         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12721                                  rdev, dev, mac_addr, sinfo) < 0) {
12722                 nlmsg_free(msg);
12723                 return;
12724         }
12725
12726         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12727                                 NL80211_MCGRP_MLME, gfp);
12728 }
12729 EXPORT_SYMBOL(cfg80211_new_sta);
12730
12731 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12732                             struct station_info *sinfo, gfp_t gfp)
12733 {
12734         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12735         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12736         struct sk_buff *msg;
12737         struct station_info empty_sinfo = {};
12738
12739         if (!sinfo)
12740                 sinfo = &empty_sinfo;
12741
12742         trace_cfg80211_del_sta(dev, mac_addr);
12743
12744         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12745         if (!msg)
12746                 return;
12747
12748         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12749                                  rdev, dev, mac_addr, sinfo) < 0) {
12750                 nlmsg_free(msg);
12751                 return;
12752         }
12753
12754         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12755                                 NL80211_MCGRP_MLME, gfp);
12756 }
12757 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12758
12759 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12760                           enum nl80211_connect_failed_reason reason,
12761                           gfp_t gfp)
12762 {
12763         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12764         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12765         struct sk_buff *msg;
12766         void *hdr;
12767
12768         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12769         if (!msg)
12770                 return;
12771
12772         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12773         if (!hdr) {
12774                 nlmsg_free(msg);
12775                 return;
12776         }
12777
12778         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12779             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12780             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12781                 goto nla_put_failure;
12782
12783         genlmsg_end(msg, hdr);
12784
12785         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12786                                 NL80211_MCGRP_MLME, gfp);
12787         return;
12788
12789  nla_put_failure:
12790         genlmsg_cancel(msg, hdr);
12791         nlmsg_free(msg);
12792 }
12793 EXPORT_SYMBOL(cfg80211_conn_failed);
12794
12795 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12796                                        const u8 *addr, gfp_t gfp)
12797 {
12798         struct wireless_dev *wdev = dev->ieee80211_ptr;
12799         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12800         struct sk_buff *msg;
12801         void *hdr;
12802         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12803
12804         if (!nlportid)
12805                 return false;
12806
12807         msg = nlmsg_new(100, gfp);
12808         if (!msg)
12809                 return true;
12810
12811         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12812         if (!hdr) {
12813                 nlmsg_free(msg);
12814                 return true;
12815         }
12816
12817         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12818             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12819             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12820                 goto nla_put_failure;
12821
12822         genlmsg_end(msg, hdr);
12823         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12824         return true;
12825
12826  nla_put_failure:
12827         genlmsg_cancel(msg, hdr);
12828         nlmsg_free(msg);
12829         return true;
12830 }
12831
12832 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12833                                 const u8 *addr, gfp_t gfp)
12834 {
12835         struct wireless_dev *wdev = dev->ieee80211_ptr;
12836         bool ret;
12837
12838         trace_cfg80211_rx_spurious_frame(dev, addr);
12839
12840         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12841                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12842                 trace_cfg80211_return_bool(false);
12843                 return false;
12844         }
12845         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12846                                          addr, gfp);
12847         trace_cfg80211_return_bool(ret);
12848         return ret;
12849 }
12850 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12851
12852 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12853                                         const u8 *addr, gfp_t gfp)
12854 {
12855         struct wireless_dev *wdev = dev->ieee80211_ptr;
12856         bool ret;
12857
12858         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12859
12860         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12861                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12862                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12863                 trace_cfg80211_return_bool(false);
12864                 return false;
12865         }
12866         ret = __nl80211_unexpected_frame(dev,
12867                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12868                                          addr, gfp);
12869         trace_cfg80211_return_bool(ret);
12870         return ret;
12871 }
12872 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12873
12874 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12875                       struct wireless_dev *wdev, u32 nlportid,
12876                       int freq, int sig_dbm,
12877                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12878 {
12879         struct net_device *netdev = wdev->netdev;
12880         struct sk_buff *msg;
12881         void *hdr;
12882
12883         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12884         if (!msg)
12885                 return -ENOMEM;
12886
12887         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12888         if (!hdr) {
12889                 nlmsg_free(msg);
12890                 return -ENOMEM;
12891         }
12892
12893         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12894             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12895                                         netdev->ifindex)) ||
12896             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12897                               NL80211_ATTR_PAD) ||
12898             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12899             (sig_dbm &&
12900              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12901             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12902             (flags &&
12903              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12904                 goto nla_put_failure;
12905
12906         genlmsg_end(msg, hdr);
12907
12908         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12909
12910  nla_put_failure:
12911         genlmsg_cancel(msg, hdr);
12912         nlmsg_free(msg);
12913         return -ENOBUFS;
12914 }
12915
12916 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12917                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12918 {
12919         struct wiphy *wiphy = wdev->wiphy;
12920         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12921         struct net_device *netdev = wdev->netdev;
12922         struct sk_buff *msg;
12923         void *hdr;
12924
12925         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12926
12927         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12928         if (!msg)
12929                 return;
12930
12931         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12932         if (!hdr) {
12933                 nlmsg_free(msg);
12934                 return;
12935         }
12936
12937         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12938             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12939                                    netdev->ifindex)) ||
12940             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
12941                               NL80211_ATTR_PAD) ||
12942             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12943             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
12944                               NL80211_ATTR_PAD) ||
12945             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12946                 goto nla_put_failure;
12947
12948         genlmsg_end(msg, hdr);
12949
12950         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12951                                 NL80211_MCGRP_MLME, gfp);
12952         return;
12953
12954  nla_put_failure:
12955         genlmsg_cancel(msg, hdr);
12956         nlmsg_free(msg);
12957 }
12958 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12959
12960 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12961                                             const char *mac, gfp_t gfp)
12962 {
12963         struct wireless_dev *wdev = dev->ieee80211_ptr;
12964         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12965         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12966         void **cb;
12967
12968         if (!msg)
12969                 return NULL;
12970
12971         cb = (void **)msg->cb;
12972
12973         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12974         if (!cb[0]) {
12975                 nlmsg_free(msg);
12976                 return NULL;
12977         }
12978
12979         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12980             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12981                 goto nla_put_failure;
12982
12983         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12984                 goto nla_put_failure;
12985
12986         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12987         if (!cb[1])
12988                 goto nla_put_failure;
12989
12990         cb[2] = rdev;
12991
12992         return msg;
12993  nla_put_failure:
12994         nlmsg_free(msg);
12995         return NULL;
12996 }
12997
12998 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12999 {
13000         void **cb = (void **)msg->cb;
13001         struct cfg80211_registered_device *rdev = cb[2];
13002
13003         nla_nest_end(msg, cb[1]);
13004         genlmsg_end(msg, cb[0]);
13005
13006         memset(msg->cb, 0, sizeof(msg->cb));
13007
13008         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13009                                 NL80211_MCGRP_MLME, gfp);
13010 }
13011
13012 void cfg80211_cqm_rssi_notify(struct net_device *dev,
13013                               enum nl80211_cqm_rssi_threshold_event rssi_event,
13014                               gfp_t gfp)
13015 {
13016         struct sk_buff *msg;
13017
13018         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
13019
13020         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
13021                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
13022                 return;
13023
13024         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13025         if (!msg)
13026                 return;
13027
13028         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
13029                         rssi_event))
13030                 goto nla_put_failure;
13031
13032         cfg80211_send_cqm(msg, gfp);
13033
13034         return;
13035
13036  nla_put_failure:
13037         nlmsg_free(msg);
13038 }
13039 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
13040
13041 void cfg80211_cqm_txe_notify(struct net_device *dev,
13042                              const u8 *peer, u32 num_packets,
13043                              u32 rate, u32 intvl, gfp_t gfp)
13044 {
13045         struct sk_buff *msg;
13046
13047         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13048         if (!msg)
13049                 return;
13050
13051         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
13052                 goto nla_put_failure;
13053
13054         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
13055                 goto nla_put_failure;
13056
13057         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
13058                 goto nla_put_failure;
13059
13060         cfg80211_send_cqm(msg, gfp);
13061         return;
13062
13063  nla_put_failure:
13064         nlmsg_free(msg);
13065 }
13066 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
13067
13068 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
13069                                  const u8 *peer, u32 num_packets, gfp_t gfp)
13070 {
13071         struct sk_buff *msg;
13072
13073         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
13074
13075         msg = cfg80211_prepare_cqm(dev, peer, gfp);
13076         if (!msg)
13077                 return;
13078
13079         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
13080                 goto nla_put_failure;
13081
13082         cfg80211_send_cqm(msg, gfp);
13083         return;
13084
13085  nla_put_failure:
13086         nlmsg_free(msg);
13087 }
13088 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
13089
13090 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
13091 {
13092         struct sk_buff *msg;
13093
13094         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
13095         if (!msg)
13096                 return;
13097
13098         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
13099                 goto nla_put_failure;
13100
13101         cfg80211_send_cqm(msg, gfp);
13102         return;
13103
13104  nla_put_failure:
13105         nlmsg_free(msg);
13106 }
13107 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
13108
13109 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
13110                                      struct net_device *netdev, const u8 *bssid,
13111                                      const u8 *replay_ctr, gfp_t gfp)
13112 {
13113         struct sk_buff *msg;
13114         struct nlattr *rekey_attr;
13115         void *hdr;
13116
13117         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13118         if (!msg)
13119                 return;
13120
13121         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
13122         if (!hdr) {
13123                 nlmsg_free(msg);
13124                 return;
13125         }
13126
13127         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13128             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13129             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13130                 goto nla_put_failure;
13131
13132         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
13133         if (!rekey_attr)
13134                 goto nla_put_failure;
13135
13136         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
13137                     NL80211_REPLAY_CTR_LEN, replay_ctr))
13138                 goto nla_put_failure;
13139
13140         nla_nest_end(msg, rekey_attr);
13141
13142         genlmsg_end(msg, hdr);
13143
13144         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13145                                 NL80211_MCGRP_MLME, gfp);
13146         return;
13147
13148  nla_put_failure:
13149         genlmsg_cancel(msg, hdr);
13150         nlmsg_free(msg);
13151 }
13152
13153 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
13154                                const u8 *replay_ctr, gfp_t gfp)
13155 {
13156         struct wireless_dev *wdev = dev->ieee80211_ptr;
13157         struct wiphy *wiphy = wdev->wiphy;
13158         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13159
13160         trace_cfg80211_gtk_rekey_notify(dev, bssid);
13161         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
13162 }
13163 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
13164
13165 static void
13166 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
13167                                struct net_device *netdev, int index,
13168                                const u8 *bssid, bool preauth, gfp_t gfp)
13169 {
13170         struct sk_buff *msg;
13171         struct nlattr *attr;
13172         void *hdr;
13173
13174         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13175         if (!msg)
13176                 return;
13177
13178         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
13179         if (!hdr) {
13180                 nlmsg_free(msg);
13181                 return;
13182         }
13183
13184         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13185             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13186                 goto nla_put_failure;
13187
13188         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
13189         if (!attr)
13190                 goto nla_put_failure;
13191
13192         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
13193             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
13194             (preauth &&
13195              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
13196                 goto nla_put_failure;
13197
13198         nla_nest_end(msg, attr);
13199
13200         genlmsg_end(msg, hdr);
13201
13202         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13203                                 NL80211_MCGRP_MLME, gfp);
13204         return;
13205
13206  nla_put_failure:
13207         genlmsg_cancel(msg, hdr);
13208         nlmsg_free(msg);
13209 }
13210
13211 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
13212                                      const u8 *bssid, bool preauth, gfp_t gfp)
13213 {
13214         struct wireless_dev *wdev = dev->ieee80211_ptr;
13215         struct wiphy *wiphy = wdev->wiphy;
13216         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13217
13218         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
13219         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
13220 }
13221 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
13222
13223 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
13224                                      struct net_device *netdev,
13225                                      struct cfg80211_chan_def *chandef,
13226                                      gfp_t gfp,
13227                                      enum nl80211_commands notif,
13228                                      u8 count)
13229 {
13230         struct sk_buff *msg;
13231         void *hdr;
13232
13233         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13234         if (!msg)
13235                 return;
13236
13237         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
13238         if (!hdr) {
13239                 nlmsg_free(msg);
13240                 return;
13241         }
13242
13243         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
13244                 goto nla_put_failure;
13245
13246         if (nl80211_send_chandef(msg, chandef))
13247                 goto nla_put_failure;
13248
13249         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
13250             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
13251                         goto nla_put_failure;
13252
13253         genlmsg_end(msg, hdr);
13254
13255         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13256                                 NL80211_MCGRP_MLME, gfp);
13257         return;
13258
13259  nla_put_failure:
13260         genlmsg_cancel(msg, hdr);
13261         nlmsg_free(msg);
13262 }
13263
13264 void cfg80211_ch_switch_notify(struct net_device *dev,
13265                                struct cfg80211_chan_def *chandef)
13266 {
13267         struct wireless_dev *wdev = dev->ieee80211_ptr;
13268         struct wiphy *wiphy = wdev->wiphy;
13269         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13270
13271         ASSERT_WDEV_LOCK(wdev);
13272
13273         trace_cfg80211_ch_switch_notify(dev, chandef);
13274
13275         wdev->chandef = *chandef;
13276         wdev->preset_chandef = *chandef;
13277         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13278                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
13279 }
13280 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
13281
13282 void cfg80211_ch_switch_started_notify(struct net_device *dev,
13283                                        struct cfg80211_chan_def *chandef,
13284                                        u8 count)
13285 {
13286         struct wireless_dev *wdev = dev->ieee80211_ptr;
13287         struct wiphy *wiphy = wdev->wiphy;
13288         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13289
13290         trace_cfg80211_ch_switch_started_notify(dev, chandef);
13291
13292         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
13293                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
13294 }
13295 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
13296
13297 void
13298 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
13299                      const struct cfg80211_chan_def *chandef,
13300                      enum nl80211_radar_event event,
13301                      struct net_device *netdev, gfp_t gfp)
13302 {
13303         struct sk_buff *msg;
13304         void *hdr;
13305
13306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13307         if (!msg)
13308                 return;
13309
13310         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
13311         if (!hdr) {
13312                 nlmsg_free(msg);
13313                 return;
13314         }
13315
13316         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
13317                 goto nla_put_failure;
13318
13319         /* NOP and radar events don't need a netdev parameter */
13320         if (netdev) {
13321                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
13322
13323                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13324                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13325                                       NL80211_ATTR_PAD))
13326                         goto nla_put_failure;
13327         }
13328
13329         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
13330                 goto nla_put_failure;
13331
13332         if (nl80211_send_chandef(msg, chandef))
13333                 goto nla_put_failure;
13334
13335         genlmsg_end(msg, hdr);
13336
13337         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13338                                 NL80211_MCGRP_MLME, gfp);
13339         return;
13340
13341  nla_put_failure:
13342         genlmsg_cancel(msg, hdr);
13343         nlmsg_free(msg);
13344 }
13345
13346 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
13347                            u64 cookie, bool acked, gfp_t gfp)
13348 {
13349         struct wireless_dev *wdev = dev->ieee80211_ptr;
13350         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13351         struct sk_buff *msg;
13352         void *hdr;
13353
13354         trace_cfg80211_probe_status(dev, addr, cookie, acked);
13355
13356         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13357
13358         if (!msg)
13359                 return;
13360
13361         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
13362         if (!hdr) {
13363                 nlmsg_free(msg);
13364                 return;
13365         }
13366
13367         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13368             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13369             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13370             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13371                               NL80211_ATTR_PAD) ||
13372             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
13373                 goto nla_put_failure;
13374
13375         genlmsg_end(msg, hdr);
13376
13377         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13378                                 NL80211_MCGRP_MLME, gfp);
13379         return;
13380
13381  nla_put_failure:
13382         genlmsg_cancel(msg, hdr);
13383         nlmsg_free(msg);
13384 }
13385 EXPORT_SYMBOL(cfg80211_probe_status);
13386
13387 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
13388                                  const u8 *frame, size_t len,
13389                                  int freq, int sig_dbm)
13390 {
13391         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13392         struct sk_buff *msg;
13393         void *hdr;
13394         struct cfg80211_beacon_registration *reg;
13395
13396         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
13397
13398         spin_lock_bh(&rdev->beacon_registrations_lock);
13399         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
13400                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
13401                 if (!msg) {
13402                         spin_unlock_bh(&rdev->beacon_registrations_lock);
13403                         return;
13404                 }
13405
13406                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
13407                 if (!hdr)
13408                         goto nla_put_failure;
13409
13410                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13411                     (freq &&
13412                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
13413                     (sig_dbm &&
13414                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
13415                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
13416                         goto nla_put_failure;
13417
13418                 genlmsg_end(msg, hdr);
13419
13420                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
13421         }
13422         spin_unlock_bh(&rdev->beacon_registrations_lock);
13423         return;
13424
13425  nla_put_failure:
13426         spin_unlock_bh(&rdev->beacon_registrations_lock);
13427         if (hdr)
13428                 genlmsg_cancel(msg, hdr);
13429         nlmsg_free(msg);
13430 }
13431 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13432
13433 #ifdef CONFIG_PM
13434 static int cfg80211_net_detect_results(struct sk_buff *msg,
13435                                        struct cfg80211_wowlan_wakeup *wakeup)
13436 {
13437         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13438         struct nlattr *nl_results, *nl_match, *nl_freqs;
13439         int i, j;
13440
13441         nl_results = nla_nest_start(
13442                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13443         if (!nl_results)
13444                 return -EMSGSIZE;
13445
13446         for (i = 0; i < nd->n_matches; i++) {
13447                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13448
13449                 nl_match = nla_nest_start(msg, i);
13450                 if (!nl_match)
13451                         break;
13452
13453                 /* The SSID attribute is optional in nl80211, but for
13454                  * simplicity reasons it's always present in the
13455                  * cfg80211 structure.  If a driver can't pass the
13456                  * SSID, that needs to be changed.  A zero length SSID
13457                  * is still a valid SSID (wildcard), so it cannot be
13458                  * used for this purpose.
13459                  */
13460                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13461                             match->ssid.ssid)) {
13462                         nla_nest_cancel(msg, nl_match);
13463                         goto out;
13464                 }
13465
13466                 if (match->n_channels) {
13467                         nl_freqs = nla_nest_start(
13468                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13469                         if (!nl_freqs) {
13470                                 nla_nest_cancel(msg, nl_match);
13471                                 goto out;
13472                         }
13473
13474                         for (j = 0; j < match->n_channels; j++) {
13475                                 if (nla_put_u32(msg, j, match->channels[j])) {
13476                                         nla_nest_cancel(msg, nl_freqs);
13477                                         nla_nest_cancel(msg, nl_match);
13478                                         goto out;
13479                                 }
13480                         }
13481
13482                         nla_nest_end(msg, nl_freqs);
13483                 }
13484
13485                 nla_nest_end(msg, nl_match);
13486         }
13487
13488 out:
13489         nla_nest_end(msg, nl_results);
13490         return 0;
13491 }
13492
13493 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13494                                    struct cfg80211_wowlan_wakeup *wakeup,
13495                                    gfp_t gfp)
13496 {
13497         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13498         struct sk_buff *msg;
13499         void *hdr;
13500         int size = 200;
13501
13502         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13503
13504         if (wakeup)
13505                 size += wakeup->packet_present_len;
13506
13507         msg = nlmsg_new(size, gfp);
13508         if (!msg)
13509                 return;
13510
13511         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13512         if (!hdr)
13513                 goto free_msg;
13514
13515         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13516             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13517                               NL80211_ATTR_PAD))
13518                 goto free_msg;
13519
13520         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13521                                         wdev->netdev->ifindex))
13522                 goto free_msg;
13523
13524         if (wakeup) {
13525                 struct nlattr *reasons;
13526
13527                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13528                 if (!reasons)
13529                         goto free_msg;
13530
13531                 if (wakeup->disconnect &&
13532                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13533                         goto free_msg;
13534                 if (wakeup->magic_pkt &&
13535                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13536                         goto free_msg;
13537                 if (wakeup->gtk_rekey_failure &&
13538                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13539                         goto free_msg;
13540                 if (wakeup->eap_identity_req &&
13541                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13542                         goto free_msg;
13543                 if (wakeup->four_way_handshake &&
13544                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13545                         goto free_msg;
13546                 if (wakeup->rfkill_release &&
13547                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13548                         goto free_msg;
13549
13550                 if (wakeup->pattern_idx >= 0 &&
13551                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13552                                 wakeup->pattern_idx))
13553                         goto free_msg;
13554
13555                 if (wakeup->tcp_match &&
13556                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13557                         goto free_msg;
13558
13559                 if (wakeup->tcp_connlost &&
13560                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13561                         goto free_msg;
13562
13563                 if (wakeup->tcp_nomoretokens &&
13564                     nla_put_flag(msg,
13565                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13566                         goto free_msg;
13567
13568                 if (wakeup->packet) {
13569                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13570                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13571
13572                         if (!wakeup->packet_80211) {
13573                                 pkt_attr =
13574                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13575                                 len_attr =
13576                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13577                         }
13578
13579                         if (wakeup->packet_len &&
13580                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13581                                 goto free_msg;
13582
13583                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13584                                     wakeup->packet))
13585                                 goto free_msg;
13586                 }
13587
13588                 if (wakeup->net_detect &&
13589                     cfg80211_net_detect_results(msg, wakeup))
13590                                 goto free_msg;
13591
13592                 nla_nest_end(msg, reasons);
13593         }
13594
13595         genlmsg_end(msg, hdr);
13596
13597         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13598                                 NL80211_MCGRP_MLME, gfp);
13599         return;
13600
13601  free_msg:
13602         nlmsg_free(msg);
13603 }
13604 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13605 #endif
13606
13607 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13608                                 enum nl80211_tdls_operation oper,
13609                                 u16 reason_code, gfp_t gfp)
13610 {
13611         struct wireless_dev *wdev = dev->ieee80211_ptr;
13612         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13613         struct sk_buff *msg;
13614         void *hdr;
13615
13616         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13617                                          reason_code);
13618
13619         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13620         if (!msg)
13621                 return;
13622
13623         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13624         if (!hdr) {
13625                 nlmsg_free(msg);
13626                 return;
13627         }
13628
13629         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13630             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13631             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13632             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13633             (reason_code > 0 &&
13634              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13635                 goto nla_put_failure;
13636
13637         genlmsg_end(msg, hdr);
13638
13639         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13640                                 NL80211_MCGRP_MLME, gfp);
13641         return;
13642
13643  nla_put_failure:
13644         genlmsg_cancel(msg, hdr);
13645         nlmsg_free(msg);
13646 }
13647 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13648
13649 static int nl80211_netlink_notify(struct notifier_block * nb,
13650                                   unsigned long state,
13651                                   void *_notify)
13652 {
13653         struct netlink_notify *notify = _notify;
13654         struct cfg80211_registered_device *rdev;
13655         struct wireless_dev *wdev;
13656         struct cfg80211_beacon_registration *reg, *tmp;
13657
13658         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13659                 return NOTIFY_DONE;
13660
13661         rcu_read_lock();
13662
13663         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13664                 bool schedule_destroy_work = false;
13665                 bool schedule_scan_stop = false;
13666                 struct cfg80211_sched_scan_request *sched_scan_req =
13667                         rcu_dereference(rdev->sched_scan_req);
13668
13669                 if (sched_scan_req && notify->portid &&
13670                     sched_scan_req->owner_nlportid == notify->portid)
13671                         schedule_scan_stop = true;
13672
13673                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
13674                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13675
13676                         if (wdev->owner_nlportid == notify->portid)
13677                                 schedule_destroy_work = true;
13678                 }
13679
13680                 spin_lock_bh(&rdev->beacon_registrations_lock);
13681                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13682                                          list) {
13683                         if (reg->nlportid == notify->portid) {
13684                                 list_del(&reg->list);
13685                                 kfree(reg);
13686                                 break;
13687                         }
13688                 }
13689                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13690
13691                 if (schedule_destroy_work) {
13692                         struct cfg80211_iface_destroy *destroy;
13693
13694                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13695                         if (destroy) {
13696                                 destroy->nlportid = notify->portid;
13697                                 spin_lock(&rdev->destroy_list_lock);
13698                                 list_add(&destroy->list, &rdev->destroy_list);
13699                                 spin_unlock(&rdev->destroy_list_lock);
13700                                 schedule_work(&rdev->destroy_work);
13701                         }
13702                 } else if (schedule_scan_stop) {
13703                         sched_scan_req->owner_nlportid = 0;
13704
13705                         if (rdev->ops->sched_scan_stop &&
13706                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13707                                 schedule_work(&rdev->sched_scan_stop_wk);
13708                 }
13709         }
13710
13711         rcu_read_unlock();
13712
13713         /*
13714          * It is possible that the user space process that is controlling the
13715          * indoor setting disappeared, so notify the regulatory core.
13716          */
13717         regulatory_netlink_notify(notify->portid);
13718         return NOTIFY_OK;
13719 }
13720
13721 static struct notifier_block nl80211_netlink_notifier = {
13722         .notifier_call = nl80211_netlink_notify,
13723 };
13724
13725 void cfg80211_ft_event(struct net_device *netdev,
13726                        struct cfg80211_ft_event_params *ft_event)
13727 {
13728         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13729         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13730         struct sk_buff *msg;
13731         void *hdr;
13732
13733         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13734
13735         if (!ft_event->target_ap)
13736                 return;
13737
13738         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13739         if (!msg)
13740                 return;
13741
13742         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13743         if (!hdr)
13744                 goto out;
13745
13746         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13747             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13748             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13749                 goto out;
13750
13751         if (ft_event->ies &&
13752             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13753                 goto out;
13754         if (ft_event->ric_ies &&
13755             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13756                     ft_event->ric_ies))
13757                 goto out;
13758
13759         genlmsg_end(msg, hdr);
13760
13761         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13762                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13763         return;
13764  out:
13765         nlmsg_free(msg);
13766 }
13767 EXPORT_SYMBOL(cfg80211_ft_event);
13768
13769 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13770 {
13771         struct cfg80211_registered_device *rdev;
13772         struct sk_buff *msg;
13773         void *hdr;
13774         u32 nlportid;
13775
13776         rdev = wiphy_to_rdev(wdev->wiphy);
13777         if (!rdev->crit_proto_nlportid)
13778                 return;
13779
13780         nlportid = rdev->crit_proto_nlportid;
13781         rdev->crit_proto_nlportid = 0;
13782
13783         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13784         if (!msg)
13785                 return;
13786
13787         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13788         if (!hdr)
13789                 goto nla_put_failure;
13790
13791         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13792             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13793                               NL80211_ATTR_PAD))
13794                 goto nla_put_failure;
13795
13796         genlmsg_end(msg, hdr);
13797
13798         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13799         return;
13800
13801  nla_put_failure:
13802         if (hdr)
13803                 genlmsg_cancel(msg, hdr);
13804         nlmsg_free(msg);
13805 }
13806 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13807
13808 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13809 {
13810         struct wiphy *wiphy = wdev->wiphy;
13811         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13812         struct sk_buff *msg;
13813         void *hdr;
13814
13815         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13816         if (!msg)
13817                 return;
13818
13819         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13820         if (!hdr)
13821                 goto out;
13822
13823         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13824             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13825             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13826                               NL80211_ATTR_PAD))
13827                 goto out;
13828
13829         genlmsg_end(msg, hdr);
13830
13831         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13832                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13833         return;
13834  out:
13835         nlmsg_free(msg);
13836 }
13837
13838 /* initialisation/exit functions */
13839
13840 int nl80211_init(void)
13841 {
13842         int err;
13843
13844         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13845                                                    nl80211_mcgrps);
13846         if (err)
13847                 return err;
13848
13849         err = netlink_register_notifier(&nl80211_netlink_notifier);
13850         if (err)
13851                 goto err_out;
13852
13853         return 0;
13854  err_out:
13855         genl_unregister_family(&nl80211_fam);
13856         return err;
13857 }
13858
13859 void nl80211_exit(void)
13860 {
13861         netlink_unregister_notifier(&nl80211_netlink_notifier);
13862         genl_unregister_family(&nl80211_fam);
13863 }