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       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/nospec.h>
  20 #include <linux/etherdevice.h>
  21 #include <net/net_namespace.h>
  22 #include <net/genetlink.h>
  23 #include <net/cfg80211.h>
  24 #include <net/sock.h>
  25 #include <net/inet_connection_sock.h>
  26 #include "core.h"
  27 #include "nl80211.h"
  28 #include "reg.h"
  29 #include "rdev-ops.h"
  30
  31 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  32                                    struct genl_info *info,
  33                                    struct cfg80211_crypto_settings *settings,
  34                                    int cipher_limit);
  35
  36 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
  37                             struct genl_info *info);
  38 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
  39                               struct genl_info *info);
  40
  41 /* the netlink family */
  42 static struct genl_family nl80211_fam = {
  43         .id = GENL_ID_GENERATE,         /* don't bother with a hardcoded ID */
  44         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
  45         .hdrsize = 0,                   /* no private header */
  46         .version = 1,                   /* no particular meaning now */
  47         .maxattr = NL80211_ATTR_MAX,
  48         .netnsok = true,
  49         .pre_doit = nl80211_pre_doit,
  50         .post_doit = nl80211_post_doit,
  51 };
  52
  53 /* multicast groups */
  54 enum nl80211_multicast_groups {
  55         NL80211_MCGRP_CONFIG,
  56         NL80211_MCGRP_SCAN,
  57         NL80211_MCGRP_REGULATORY,
  58         NL80211_MCGRP_MLME,
  59         NL80211_MCGRP_VENDOR,
  60         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  61 };
  62
  63 static const struct genl_multicast_group nl80211_mcgrps[] = {
  64         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  65         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  66         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  67         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  68         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  69 #ifdef CONFIG_NL80211_TESTMODE
  70         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  71 #endif
  72 };
  73
  74 /* returns ERR_PTR values */
  75 static struct wireless_dev *
  76 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  77 {
  78         struct cfg80211_registered_device *rdev;
  79         struct wireless_dev *result = NULL;
  80         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  81         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  82         u64 wdev_id;
  83         int wiphy_idx = -1;
  84         int ifidx = -1;
  85
  86         ASSERT_RTNL();
  87
  88         if (!have_ifidx && !have_wdev_id)
  89                 return ERR_PTR(-EINVAL);
  90
  91         if (have_ifidx)
  92                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  93         if (have_wdev_id) {
  94                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  95                 wiphy_idx = wdev_id >> 32;
  96         }
  97
  98         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  99                 struct wireless_dev *wdev;
 100
 101                 if (wiphy_net(&rdev->wiphy) != netns)
 102                         continue;
 103
 104                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
 105                         continue;
 106
 107                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
 108                         if (have_ifidx && wdev->netdev &&
 109                             wdev->netdev->ifindex == ifidx) {
 110                                 result = wdev;
 111                                 break;
 112                         }
 113                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 114                                 result = wdev;
 115                                 break;
 116                         }
 117                 }
 118
 119                 if (result)
 120                         break;
 121         }
 122
 123         if (result)
 124                 return result;
 125         return ERR_PTR(-ENODEV);
 126 }
 127
 128 static struct cfg80211_registered_device *
 129 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 130 {
 131         struct cfg80211_registered_device *rdev = NULL, *tmp;
 132         struct net_device *netdev;
 133
 134         ASSERT_RTNL();
 135
 136         if (!attrs[NL80211_ATTR_WIPHY] &&
 137             !attrs[NL80211_ATTR_IFINDEX] &&
 138             !attrs[NL80211_ATTR_WDEV])
 139                 return ERR_PTR(-EINVAL);
 140
 141         if (attrs[NL80211_ATTR_WIPHY])
 142                 rdev = cfg80211_rdev_by_wiphy_idx(
 143                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 144
 145         if (attrs[NL80211_ATTR_WDEV]) {
 146                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 147                 struct wireless_dev *wdev;
 148                 bool found = false;
 149
 150                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 151                 if (tmp) {
 152                         /* make sure wdev exists */
 153                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 154                                 if (wdev->identifier != (u32)wdev_id)
 155                                         continue;
 156                                 found = true;
 157                                 break;
 158                         }
 159
 160                         if (!found)
 161                                 tmp = NULL;
 162
 163                         if (rdev && tmp != rdev)
 164                                 return ERR_PTR(-EINVAL);
 165                         rdev = tmp;
 166                 }
 167         }
 168
 169         if (attrs[NL80211_ATTR_IFINDEX]) {
 170                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 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 static int validate_beacon_head(const struct nlattr *attr)
 214 {
 215         const u8 *data = nla_data(attr);
 216         unsigned int len = nla_len(attr);
 217         const struct element *elem;
 218         const struct ieee80211_mgmt *mgmt = (void *)data;
 219         unsigned int fixedlen = offsetof(struct ieee80211_mgmt,
 220                                          u.beacon.variable);
 221
 222         if (len < fixedlen)
 223                 goto err;
 224
 225         if (ieee80211_hdrlen(mgmt->frame_control) !=
 226             offsetof(struct ieee80211_mgmt, u.beacon))
 227                 goto err;
 228
 229         data += fixedlen;
 230         len -= fixedlen;
 231
 232         for_each_element(elem, data, len) {
 233                 /* nothing */
 234         }
 235
 236         if (for_each_element_completed(elem, data, len))
 237                 return 0;
 238
 239 err:
 240         return -EINVAL;
 241 }
 242
 243 /* policy for the attributes */
 244 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 245         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 246         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 247                                       .len = 20-1 },
 248         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 249
 250         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 251         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 252         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 253         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 254         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 255
 256         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 257         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 258         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 259         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 260         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 261         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 262
 263         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 264         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 265         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 266
 267         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 268         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 269
 270         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 271         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 272                                     .len = WLAN_MAX_KEY_LEN },
 273         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 274         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 275         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 276         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 277         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 278
 279         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 280         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 281         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 282                                        .len = IEEE80211_MAX_DATA_LEN },
 283         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 284                                        .len = IEEE80211_MAX_DATA_LEN },
 285         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 286         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 287         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 288         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 289                                                .len = NL80211_MAX_SUPP_RATES },
 290         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 291         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 292         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 293         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 294                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 295         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_BINARY,
 296                                           .len = ETH_ALEN },
 297
 298         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 299         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 300
 301         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 302         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 303         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 304         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 305                                            .len = NL80211_MAX_SUPP_RATES },
 306         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 307
 308         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 309         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 310
 311         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 312
 313         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 314         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 315                               .len = IEEE80211_MAX_DATA_LEN },
 316         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 317         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 318
 319         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 320                                 .len = IEEE80211_MAX_SSID_LEN },
 321         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 323         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 325         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 326         [NL80211_ATTR_STA_FLAGS2] = {
 327                 .len = sizeof(struct nl80211_sta_flag_update),
 328         },
 329         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 330         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 331         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_STATUS_CODE] = { .type = NLA_U16 },
 334         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 335         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 336         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 337         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 338         [NL80211_ATTR_PMKID] = { .len = WLAN_PMKID_LEN },
 339         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 340         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 341         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 342         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 343                                  .len = IEEE80211_MAX_DATA_LEN },
 344         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 345         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 346         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 347         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 348         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 349         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 350         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 351         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 352         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 353         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 354         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 355         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 356         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 357         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 358         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 359         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 360         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 361         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 362         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 363         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 364                                          .len = IEEE80211_MAX_DATA_LEN },
 365         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 366                                          .len = IEEE80211_MAX_DATA_LEN },
 367         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 368         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 369         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 370         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 371         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 372         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 373         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 374         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 375         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 376         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 377         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 378                                       .len = IEEE80211_MAX_DATA_LEN },
 379         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 380         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 381         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 382                 .len = NL80211_HT_CAPABILITY_LEN
 383         },
 384         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 385         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 386         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 387         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 388         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 389         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 390         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 391         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 392         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 393         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 394         [NL80211_ATTR_LOCAL_MESH_POWER_MODE] = {. type = NLA_U32 },
 395         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 396         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 397         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 398         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 399         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 400         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 401         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 402                 .len = NL80211_VHT_CAPABILITY_LEN,
 403         },
 404         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 405         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 406                                   .len = IEEE80211_MAX_DATA_LEN },
 407         [NL80211_ATTR_CRIT_PROT_ID] = { .type = NLA_U16 },
 408         [NL80211_ATTR_MAX_CRIT_PROT_DURATION] = { .type = NLA_U16 },
 409         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 410         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 411         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 412         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 413         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 414         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 415         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 416         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 417         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 418         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 419         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 420         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 421         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 422         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 423                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 424         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 425         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 426         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 427         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 428         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 429         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 430         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 431         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 432         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 433         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 434         [NL80211_ATTR_OPER_CLASS] = { .type = NLA_U8 },
 435         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 436         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 437         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 438         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 439         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 440 };
 441
 442 /* policy for the key attributes */
 443 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 444         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 445         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 446         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 447         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 448         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 449         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 450         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 451         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 452 };
 453
 454 /* policy for the key default flags */
 455 static const struct nla_policy
 456 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 457         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 458         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 459 };
 460
 461 /* policy for WoWLAN attributes */
 462 static const struct nla_policy
 463 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 464         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 465         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 466         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 467         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 468         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 469         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 470         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 471         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 472         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 473         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 474 };
 475
 476 static const struct nla_policy
 477 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 478         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 479         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 480         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 481         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 482         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 483         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 484         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 485                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 486         },
 487         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 488                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 489         },
 490         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 491         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 492         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 493 };
 494
 495 /* policy for coalesce rule attributes */
 496 static const struct nla_policy
 497 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 498         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 499         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 500         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 501 };
 502
 503 /* policy for GTK rekey offload attributes */
 504 static const struct nla_policy
 505 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 506         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 507         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 508         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 509 };
 510
 511 static const struct nla_policy
 512 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 513         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 514                                                  .len = IEEE80211_MAX_SSID_LEN },
 515         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 516 };
 517
 518 static const struct nla_policy
 519 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 520         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 521         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 522 };
 523
 524 /* policy for packet pattern attributes */
 525 static const struct nla_policy
 526 nl80211_packet_pattern_policy[MAX_NL80211_PKTPAT + 1] = {
 527         [NL80211_PKTPAT_MASK] = { .type = NLA_BINARY, },
 528         [NL80211_PKTPAT_PATTERN] = { .type = NLA_BINARY, },
 529         [NL80211_PKTPAT_OFFSET] = { .type = NLA_U32 },
 530 };
 531
 532 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 533                                      struct netlink_callback *cb,
 534                                      struct cfg80211_registered_device **rdev,
 535                                      struct wireless_dev **wdev)
 536 {
 537         int err;
 538
 539         if (!cb->args[0]) {
 540                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 541                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
 542                                   nl80211_policy);
 543                 if (err)
 544                         return err;
 545
 546                 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
 547                                                    nl80211_fam.attrbuf);
 548                 if (IS_ERR(*wdev))
 549                         return PTR_ERR(*wdev);
 550                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 551                 /* 0 is the first index - add 1 to parse only once */
 552                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 553                 cb->args[1] = (*wdev)->identifier;
 554         } else {
 555                 /* subtract the 1 again here */
 556                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 557                 struct wireless_dev *tmp;
 558
 559                 if (!wiphy)
 560                         return -ENODEV;
 561                 *rdev = wiphy_to_rdev(wiphy);
 562                 *wdev = NULL;
 563
 564                 list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
 565                         if (tmp->identifier == cb->args[1]) {
 566                                 *wdev = tmp;
 567                                 break;
 568                         }
 569                 }
 570
 571                 if (!*wdev)
 572                         return -ENODEV;
 573         }
 574
 575         return 0;
 576 }
 577
 578 /* IE validation */
 579 static bool is_valid_ie_attr(const struct nlattr *attr)
 580 {
 581         const u8 *pos;
 582         int len;
 583
 584         if (!attr)
 585                 return true;
 586
 587         pos = nla_data(attr);
 588         len = nla_len(attr);
 589
 590         while (len) {
 591                 u8 elemlen;
 592
 593                 if (len < 2)
 594                         return false;
 595                 len -= 2;
 596
 597                 elemlen = pos[1];
 598                 if (elemlen > len)
 599                         return false;
 600
 601                 len -= elemlen;
 602                 pos += 2 + elemlen;
 603         }
 604
 605         return true;
 606 }
 607
 608 /* message building helper */
 609 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 610                                    int flags, u8 cmd)
 611 {
 612         /* since there is no private header just add the generic one */
 613         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 614 }
 615
 616 static int nl80211_msg_put_channel(struct sk_buff *msg,
 617                                    struct ieee80211_channel *chan,
 618                                    bool large)
 619 {
 620         /* Some channels must be completely excluded from the
 621          * list to protect old user-space tools from breaking
 622          */
 623         if (!large && chan->flags &
 624             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 625                 return 0;
 626
 627         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 628                         chan->center_freq))
 629                 goto nla_put_failure;
 630
 631         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 632             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 633                 goto nla_put_failure;
 634         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 635                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 636                         goto nla_put_failure;
 637                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 638                         goto nla_put_failure;
 639         }
 640         if (chan->flags & IEEE80211_CHAN_RADAR) {
 641                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 642                         goto nla_put_failure;
 643                 if (large) {
 644                         u32 time;
 645
 646                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 647
 648                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 649                                         chan->dfs_state))
 650                                 goto nla_put_failure;
 651                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 652                                         time))
 653                                 goto nla_put_failure;
 654                         if (nla_put_u32(msg,
 655                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 656                                         chan->dfs_cac_ms))
 657                                 goto nla_put_failure;
 658                 }
 659         }
 660
 661         if (large) {
 662                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 663                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 664                         goto nla_put_failure;
 665                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 666                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 667                         goto nla_put_failure;
 668                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 669                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 670                         goto nla_put_failure;
 671                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 672                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 673                         goto nla_put_failure;
 674                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 675                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 676                         goto nla_put_failure;
 677                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 678                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 679                         goto nla_put_failure;
 680                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 681                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 682                         goto nla_put_failure;
 683                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 684                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 685                         goto nla_put_failure;
 686         }
 687
 688         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 689                         DBM_TO_MBM(chan->max_power)))
 690                 goto nla_put_failure;
 691
 692         return 0;
 693
 694  nla_put_failure:
 695         return -ENOBUFS;
 696 }
 697
 698 /* netlink command implementations */
 699
 700 struct key_parse {
 701         struct key_params p;
 702         int idx;
 703         int type;
 704         bool def, defmgmt;
 705         bool def_uni, def_multi;
 706 };
 707
 708 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 709 {
 710         struct nlattr *tb[NL80211_KEY_MAX + 1];
 711         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 712                                    nl80211_key_policy);
 713         if (err)
 714                 return err;
 715
 716         k->def = !!tb[NL80211_KEY_DEFAULT];
 717         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 718
 719         if (k->def) {
 720                 k->def_uni = true;
 721                 k->def_multi = true;
 722         }
 723         if (k->defmgmt)
 724                 k->def_multi = true;
 725
 726         if (tb[NL80211_KEY_IDX])
 727                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 728
 729         if (tb[NL80211_KEY_DATA]) {
 730                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 731                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 732         }
 733
 734         if (tb[NL80211_KEY_SEQ]) {
 735                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 736                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 737         }
 738
 739         if (tb[NL80211_KEY_CIPHER])
 740                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 741
 742         if (tb[NL80211_KEY_TYPE]) {
 743                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 744                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 745                         return -EINVAL;
 746         }
 747
 748         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 749                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 750                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 751                                        tb[NL80211_KEY_DEFAULT_TYPES],
 752                                        nl80211_key_default_policy);
 753                 if (err)
 754                         return err;
 755
 756                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 757                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 764 {
 765         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 766                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 767                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 768         }
 769
 770         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 771                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 772                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 773         }
 774
 775         if (info->attrs[NL80211_ATTR_KEY_IDX])
 776                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 777
 778         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 779                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 780
 781         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 782         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 783
 784         if (k->def) {
 785                 k->def_uni = true;
 786                 k->def_multi = true;
 787         }
 788         if (k->defmgmt)
 789                 k->def_multi = true;
 790
 791         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 792                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 793                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 794                         return -EINVAL;
 795         }
 796
 797         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 798                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 799                 int err = nla_parse_nested(
 800                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 801                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 802                                 nl80211_key_default_policy);
 803                 if (err)
 804                         return err;
 805
 806                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 807                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 808         }
 809
 810         return 0;
 811 }
 812
 813 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 814 {
 815         int err;
 816
 817         memset(k, 0, sizeof(*k));
 818         k->idx = -1;
 819         k->type = -1;
 820
 821         if (info->attrs[NL80211_ATTR_KEY])
 822                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 823         else
 824                 err = nl80211_parse_key_old(info, k);
 825
 826         if (err)
 827                 return err;
 828
 829         if (k->def && k->defmgmt)
 830                 return -EINVAL;
 831
 832         if (k->defmgmt) {
 833                 if (k->def_uni || !k->def_multi)
 834                         return -EINVAL;
 835         }
 836
 837         if (k->idx != -1) {
 838                 if (k->defmgmt) {
 839                         if (k->idx < 4 || k->idx > 5)
 840                                 return -EINVAL;
 841                 } else if (k->def) {
 842                         if (k->idx < 0 || k->idx > 3)
 843                                 return -EINVAL;
 844                 } else {
 845                         if (k->idx < 0 || k->idx > 5)
 846                                 return -EINVAL;
 847                 }
 848         }
 849
 850         return 0;
 851 }
 852
 853 static struct cfg80211_cached_keys *
 854 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 855                        struct nlattr *keys, bool *no_ht)
 856 {
 857         struct key_parse parse;
 858         struct nlattr *key;
 859         struct cfg80211_cached_keys *result;
 860         int rem, err, def = 0;
 861
 862         result = kzalloc(sizeof(*result), GFP_KERNEL);
 863         if (!result)
 864                 return ERR_PTR(-ENOMEM);
 865
 866         result->def = -1;
 867         result->defmgmt = -1;
 868
 869         nla_for_each_nested(key, keys, rem) {
 870                 memset(&parse, 0, sizeof(parse));
 871                 parse.idx = -1;
 872
 873                 err = nl80211_parse_key_new(key, &parse);
 874                 if (err)
 875                         goto error;
 876                 err = -EINVAL;
 877                 if (!parse.p.key)
 878                         goto error;
 879                 if (parse.idx < 0 || parse.idx > 4)
 880                         goto error;
 881                 if (parse.def) {
 882                         if (def)
 883                                 goto error;
 884                         def = 1;
 885                         result->def = parse.idx;
 886                         if (!parse.def_uni || !parse.def_multi)
 887                                 goto error;
 888                 } else if (parse.defmgmt)
 889                         goto error;
 890                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 891                                                      parse.idx, false, NULL);
 892                 if (err)
 893                         goto error;
 894                 result->params[parse.idx].cipher = parse.p.cipher;
 895                 result->params[parse.idx].key_len = parse.p.key_len;
 896                 result->params[parse.idx].key = result->data[parse.idx];
 897                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 898
 899                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 900                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 901                         if (no_ht)
 902                                 *no_ht = true;
 903                 }
 904         }
 905
 906         return result;
 907  error:
 908         kfree(result);
 909         return ERR_PTR(err);
 910 }
 911
 912 static int nl80211_key_allowed(struct wireless_dev *wdev)
 913 {
 914         ASSERT_WDEV_LOCK(wdev);
 915
 916         switch (wdev->iftype) {
 917         case NL80211_IFTYPE_AP:
 918         case NL80211_IFTYPE_AP_VLAN:
 919         case NL80211_IFTYPE_P2P_GO:
 920         case NL80211_IFTYPE_MESH_POINT:
 921                 break;
 922         case NL80211_IFTYPE_ADHOC:
 923         case NL80211_IFTYPE_STATION:
 924         case NL80211_IFTYPE_P2P_CLIENT:
 925                 if (!wdev->current_bss)
 926                         return -ENOLINK;
 927                 break;
 928         case NL80211_IFTYPE_UNSPECIFIED:
 929         case NL80211_IFTYPE_OCB:
 930         case NL80211_IFTYPE_MONITOR:
 931         case NL80211_IFTYPE_P2P_DEVICE:
 932         case NL80211_IFTYPE_WDS:
 933         case NUM_NL80211_IFTYPES:
 934                 return -EINVAL;
 935         }
 936
 937         return 0;
 938 }
 939
 940 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 941                                                         struct nlattr *tb)
 942 {
 943         struct ieee80211_channel *chan;
 944
 945         if (tb == NULL)
 946                 return NULL;
 947         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 948         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 949                 return NULL;
 950         return chan;
 951 }
 952
 953 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 954 {
 955         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 956         int i;
 957
 958         if (!nl_modes)
 959                 goto nla_put_failure;
 960
 961         i = 0;
 962         while (ifmodes) {
 963                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 964                         goto nla_put_failure;
 965                 ifmodes >>= 1;
 966                 i++;
 967         }
 968
 969         nla_nest_end(msg, nl_modes);
 970         return 0;
 971
 972 nla_put_failure:
 973         return -ENOBUFS;
 974 }
 975
 976 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 977                                           struct sk_buff *msg,
 978                                           bool large)
 979 {
 980         struct nlattr *nl_combis;
 981         int i, j;
 982
 983         nl_combis = nla_nest_start(msg,
 984                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 985         if (!nl_combis)
 986                 goto nla_put_failure;
 987
 988         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 989                 const struct ieee80211_iface_combination *c;
 990                 struct nlattr *nl_combi, *nl_limits;
 991
 992                 c = &wiphy->iface_combinations[i];
 993
 994                 nl_combi = nla_nest_start(msg, i + 1);
 995                 if (!nl_combi)
 996                         goto nla_put_failure;
 997
 998                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 999                 if (!nl_limits)
1000                         goto nla_put_failure;
1001
1002                 for (j = 0; j < c->n_limits; j++) {
1003                         struct nlattr *nl_limit;
1004
1005                         nl_limit = nla_nest_start(msg, j + 1);
1006                         if (!nl_limit)
1007                                 goto nla_put_failure;
1008                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1009                                         c->limits[j].max))
1010                                 goto nla_put_failure;
1011                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1012                                                 c->limits[j].types))
1013                                 goto nla_put_failure;
1014                         nla_nest_end(msg, nl_limit);
1015                 }
1016
1017                 nla_nest_end(msg, nl_limits);
1018
1019                 if (c->beacon_int_infra_match &&
1020                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1021                         goto nla_put_failure;
1022                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1023                                 c->num_different_channels) ||
1024                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1025                                 c->max_interfaces))
1026                         goto nla_put_failure;
1027                 if (large &&
1028                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1029                                 c->radar_detect_widths) ||
1030                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1031                                 c->radar_detect_regions)))
1032                         goto nla_put_failure;
1033
1034                 nla_nest_end(msg, nl_combi);
1035         }
1036
1037         nla_nest_end(msg, nl_combis);
1038
1039         return 0;
1040 nla_put_failure:
1041         return -ENOBUFS;
1042 }
1043
1044 #ifdef CONFIG_PM
1045 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1046                                         struct sk_buff *msg)
1047 {
1048         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1049         struct nlattr *nl_tcp;
1050
1051         if (!tcp)
1052                 return 0;
1053
1054         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1055         if (!nl_tcp)
1056                 return -ENOBUFS;
1057
1058         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1059                         tcp->data_payload_max))
1060                 return -ENOBUFS;
1061
1062         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1063                         tcp->data_payload_max))
1064                 return -ENOBUFS;
1065
1066         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1067                 return -ENOBUFS;
1068
1069         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1070                                 sizeof(*tcp->tok), tcp->tok))
1071                 return -ENOBUFS;
1072
1073         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1074                         tcp->data_interval_max))
1075                 return -ENOBUFS;
1076
1077         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1078                         tcp->wake_payload_max))
1079                 return -ENOBUFS;
1080
1081         nla_nest_end(msg, nl_tcp);
1082         return 0;
1083 }
1084
1085 static int nl80211_send_wowlan(struct sk_buff *msg,
1086                                struct cfg80211_registered_device *rdev,
1087                                bool large)
1088 {
1089         struct nlattr *nl_wowlan;
1090
1091         if (!rdev->wiphy.wowlan)
1092                 return 0;
1093
1094         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1095         if (!nl_wowlan)
1096                 return -ENOBUFS;
1097
1098         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1099              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1100             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1101              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1102             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1103              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1104             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1105              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1106             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1107              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1108             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1109              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1110             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1111              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1112             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1113              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1114                 return -ENOBUFS;
1115
1116         if (rdev->wiphy.wowlan->n_patterns) {
1117                 struct nl80211_pattern_support pat = {
1118                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1119                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1120                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1121                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1122                 };
1123
1124                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1125                             sizeof(pat), &pat))
1126                         return -ENOBUFS;
1127         }
1128
1129         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1130             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1131                         rdev->wiphy.wowlan->max_nd_match_sets))
1132                 return -ENOBUFS;
1133
1134         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1135                 return -ENOBUFS;
1136
1137         nla_nest_end(msg, nl_wowlan);
1138
1139         return 0;
1140 }
1141 #endif
1142
1143 static int nl80211_send_coalesce(struct sk_buff *msg,
1144                                  struct cfg80211_registered_device *rdev)
1145 {
1146         struct nl80211_coalesce_rule_support rule;
1147
1148         if (!rdev->wiphy.coalesce)
1149                 return 0;
1150
1151         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1152         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1153         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1154         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1155         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1156         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1157
1158         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1159                 return -ENOBUFS;
1160
1161         return 0;
1162 }
1163
1164 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1165                                       struct ieee80211_supported_band *sband)
1166 {
1167         struct nlattr *nl_rates, *nl_rate;
1168         struct ieee80211_rate *rate;
1169         int i;
1170
1171         /* add HT info */
1172         if (sband->ht_cap.ht_supported &&
1173             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1174                      sizeof(sband->ht_cap.mcs),
1175                      &sband->ht_cap.mcs) ||
1176              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1177                          sband->ht_cap.cap) ||
1178              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1179                         sband->ht_cap.ampdu_factor) ||
1180              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1181                         sband->ht_cap.ampdu_density)))
1182                 return -ENOBUFS;
1183
1184         /* add VHT info */
1185         if (sband->vht_cap.vht_supported &&
1186             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1187                      sizeof(sband->vht_cap.vht_mcs),
1188                      &sband->vht_cap.vht_mcs) ||
1189              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1190                          sband->vht_cap.cap)))
1191                 return -ENOBUFS;
1192
1193         /* add bitrates */
1194         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1195         if (!nl_rates)
1196                 return -ENOBUFS;
1197
1198         for (i = 0; i < sband->n_bitrates; i++) {
1199                 nl_rate = nla_nest_start(msg, i);
1200                 if (!nl_rate)
1201                         return -ENOBUFS;
1202
1203                 rate = &sband->bitrates[i];
1204                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1205                                 rate->bitrate))
1206                         return -ENOBUFS;
1207                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1208                     nla_put_flag(msg,
1209                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1210                         return -ENOBUFS;
1211
1212                 nla_nest_end(msg, nl_rate);
1213         }
1214
1215         nla_nest_end(msg, nl_rates);
1216
1217         return 0;
1218 }
1219
1220 static int
1221 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1222                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1223 {
1224         u16 stypes;
1225         struct nlattr *nl_ftypes, *nl_ifs;
1226         enum nl80211_iftype ift;
1227         int i;
1228
1229         if (!mgmt_stypes)
1230                 return 0;
1231
1232         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1233         if (!nl_ifs)
1234                 return -ENOBUFS;
1235
1236         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1237                 nl_ftypes = nla_nest_start(msg, ift);
1238                 if (!nl_ftypes)
1239                         return -ENOBUFS;
1240                 i = 0;
1241                 stypes = mgmt_stypes[ift].tx;
1242                 while (stypes) {
1243                         if ((stypes & 1) &&
1244                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1245                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1246                                 return -ENOBUFS;
1247                         stypes >>= 1;
1248                         i++;
1249                 }
1250                 nla_nest_end(msg, nl_ftypes);
1251         }
1252
1253         nla_nest_end(msg, nl_ifs);
1254
1255         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1256         if (!nl_ifs)
1257                 return -ENOBUFS;
1258
1259         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1260                 nl_ftypes = nla_nest_start(msg, ift);
1261                 if (!nl_ftypes)
1262                         return -ENOBUFS;
1263                 i = 0;
1264                 stypes = mgmt_stypes[ift].rx;
1265                 while (stypes) {
1266                         if ((stypes & 1) &&
1267                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1268                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1269                                 return -ENOBUFS;
1270                         stypes >>= 1;
1271                         i++;
1272                 }
1273                 nla_nest_end(msg, nl_ftypes);
1274         }
1275         nla_nest_end(msg, nl_ifs);
1276
1277         return 0;
1278 }
1279
1280 struct nl80211_dump_wiphy_state {
1281         s64 filter_wiphy;
1282         long start;
1283         long split_start, band_start, chan_start;
1284         bool split;
1285 };
1286
1287 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1288                               enum nl80211_commands cmd,
1289                               struct sk_buff *msg, u32 portid, u32 seq,
1290                               int flags, struct nl80211_dump_wiphy_state *state)
1291 {
1292         void *hdr;
1293         struct nlattr *nl_bands, *nl_band;
1294         struct nlattr *nl_freqs, *nl_freq;
1295         struct nlattr *nl_cmds;
1296         enum ieee80211_band band;
1297         struct ieee80211_channel *chan;
1298         int i;
1299         const struct ieee80211_txrx_stypes *mgmt_stypes =
1300                                 rdev->wiphy.mgmt_stypes;
1301         u32 features;
1302
1303         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1304         if (!hdr)
1305                 return -ENOBUFS;
1306
1307         if (WARN_ON(!state))
1308                 return -EINVAL;
1309
1310         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1311             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1312                            wiphy_name(&rdev->wiphy)) ||
1313             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1314                         cfg80211_rdev_list_generation))
1315                 goto nla_put_failure;
1316
1317         if (cmd != NL80211_CMD_NEW_WIPHY)
1318                 goto finish;
1319
1320         switch (state->split_start) {
1321         case 0:
1322                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1323                                rdev->wiphy.retry_short) ||
1324                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1325                                rdev->wiphy.retry_long) ||
1326                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1327                                 rdev->wiphy.frag_threshold) ||
1328                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1329                                 rdev->wiphy.rts_threshold) ||
1330                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1331                                rdev->wiphy.coverage_class) ||
1332                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1333                                rdev->wiphy.max_scan_ssids) ||
1334                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1335                                rdev->wiphy.max_sched_scan_ssids) ||
1336                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1337                                 rdev->wiphy.max_scan_ie_len) ||
1338                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1339                                 rdev->wiphy.max_sched_scan_ie_len) ||
1340                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1341                                rdev->wiphy.max_match_sets) ||
1342                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1343                                 rdev->wiphy.max_sched_scan_plans) ||
1344                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1345                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1346                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1347                                 rdev->wiphy.max_sched_scan_plan_iterations))
1348                         goto nla_put_failure;
1349
1350                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1351                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1352                         goto nla_put_failure;
1353                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1354                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1355                         goto nla_put_failure;
1356                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1357                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1358                         goto nla_put_failure;
1359                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1360                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1361                         goto nla_put_failure;
1362                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1363                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1364                         goto nla_put_failure;
1365                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1366                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1367                         goto nla_put_failure;
1368                 state->split_start++;
1369                 if (state->split)
1370                         break;
1371         case 1:
1372                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1373                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1374                             rdev->wiphy.cipher_suites))
1375                         goto nla_put_failure;
1376
1377                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1378                                rdev->wiphy.max_num_pmkids))
1379                         goto nla_put_failure;
1380
1381                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1382                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1383                         goto nla_put_failure;
1384
1385                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1386                                 rdev->wiphy.available_antennas_tx) ||
1387                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1388                                 rdev->wiphy.available_antennas_rx))
1389                         goto nla_put_failure;
1390
1391                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1392                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1393                                 rdev->wiphy.probe_resp_offload))
1394                         goto nla_put_failure;
1395
1396                 if ((rdev->wiphy.available_antennas_tx ||
1397                      rdev->wiphy.available_antennas_rx) &&
1398                     rdev->ops->get_antenna) {
1399                         u32 tx_ant = 0, rx_ant = 0;
1400                         int res;
1401                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1402                         if (!res) {
1403                                 if (nla_put_u32(msg,
1404                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1405                                                 tx_ant) ||
1406                                     nla_put_u32(msg,
1407                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1408                                                 rx_ant))
1409                                         goto nla_put_failure;
1410                         }
1411                 }
1412
1413                 state->split_start++;
1414                 if (state->split)
1415                         break;
1416         case 2:
1417                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1418                                         rdev->wiphy.interface_modes))
1419                                 goto nla_put_failure;
1420                 state->split_start++;
1421                 if (state->split)
1422                         break;
1423         case 3:
1424                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1425                 if (!nl_bands)
1426                         goto nla_put_failure;
1427
1428                 for (band = state->band_start;
1429                      band < IEEE80211_NUM_BANDS; band++) {
1430                         struct ieee80211_supported_band *sband;
1431
1432                         sband = rdev->wiphy.bands[band];
1433
1434                         if (!sband)
1435                                 continue;
1436
1437                         nl_band = nla_nest_start(msg, band);
1438                         if (!nl_band)
1439                                 goto nla_put_failure;
1440
1441                         switch (state->chan_start) {
1442                         case 0:
1443                                 if (nl80211_send_band_rateinfo(msg, sband))
1444                                         goto nla_put_failure;
1445                                 state->chan_start++;
1446                                 if (state->split)
1447                                         break;
1448                         default:
1449                                 /* add frequencies */
1450                                 nl_freqs = nla_nest_start(
1451                                         msg, NL80211_BAND_ATTR_FREQS);
1452                                 if (!nl_freqs)
1453                                         goto nla_put_failure;
1454
1455                                 for (i = state->chan_start - 1;
1456                                      i < sband->n_channels;
1457                                      i++) {
1458                                         nl_freq = nla_nest_start(msg, i);
1459                                         if (!nl_freq)
1460                                                 goto nla_put_failure;
1461
1462                                         chan = &sband->channels[i];
1463
1464                                         if (nl80211_msg_put_channel(
1465                                                         msg, chan,
1466                                                         state->split))
1467                                                 goto nla_put_failure;
1468
1469                                         nla_nest_end(msg, nl_freq);
1470                                         if (state->split)
1471                                                 break;
1472                                 }
1473                                 if (i < sband->n_channels)
1474                                         state->chan_start = i + 2;
1475                                 else
1476                                         state->chan_start = 0;
1477                                 nla_nest_end(msg, nl_freqs);
1478                         }
1479
1480                         nla_nest_end(msg, nl_band);
1481
1482                         if (state->split) {
1483                                 /* start again here */
1484                                 if (state->chan_start)
1485                                         band--;
1486                                 break;
1487                         }
1488                 }
1489                 nla_nest_end(msg, nl_bands);
1490
1491                 if (band < IEEE80211_NUM_BANDS)
1492                         state->band_start = band + 1;
1493                 else
1494                         state->band_start = 0;
1495
1496                 /* if bands & channels are done, continue outside */
1497                 if (state->band_start == 0 && state->chan_start == 0)
1498                         state->split_start++;
1499                 if (state->split)
1500                         break;
1501         case 4:
1502                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1503                 if (!nl_cmds)
1504                         goto nla_put_failure;
1505
1506                 i = 0;
1507 #define CMD(op, n)                                                      \
1508                  do {                                                   \
1509                         if (rdev->ops->op) {                            \
1510                                 i++;                                    \
1511                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1512                                         goto nla_put_failure;           \
1513                         }                                               \
1514                 } while (0)
1515
1516                 CMD(add_virtual_intf, NEW_INTERFACE);
1517                 CMD(change_virtual_intf, SET_INTERFACE);
1518                 CMD(add_key, NEW_KEY);
1519                 CMD(start_ap, START_AP);
1520                 CMD(add_station, NEW_STATION);
1521                 CMD(add_mpath, NEW_MPATH);
1522                 CMD(update_mesh_config, SET_MESH_CONFIG);
1523                 CMD(change_bss, SET_BSS);
1524                 CMD(auth, AUTHENTICATE);
1525                 CMD(assoc, ASSOCIATE);
1526                 CMD(deauth, DEAUTHENTICATE);
1527                 CMD(disassoc, DISASSOCIATE);
1528                 CMD(join_ibss, JOIN_IBSS);
1529                 CMD(join_mesh, JOIN_MESH);
1530                 CMD(set_pmksa, SET_PMKSA);
1531                 CMD(del_pmksa, DEL_PMKSA);
1532                 CMD(flush_pmksa, FLUSH_PMKSA);
1533                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1534                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1535                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1536                 CMD(mgmt_tx, FRAME);
1537                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1538                 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1539                         i++;
1540                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1541                                 goto nla_put_failure;
1542                 }
1543                 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1544                     rdev->ops->join_mesh) {
1545                         i++;
1546                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1547                                 goto nla_put_failure;
1548                 }
1549                 CMD(set_wds_peer, SET_WDS_PEER);
1550                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1551                         CMD(tdls_mgmt, TDLS_MGMT);
1552                         CMD(tdls_oper, TDLS_OPER);
1553                 }
1554                 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1555                         CMD(sched_scan_start, START_SCHED_SCAN);
1556                 CMD(probe_client, PROBE_CLIENT);
1557                 CMD(set_noack_map, SET_NOACK_MAP);
1558                 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1559                         i++;
1560                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1561                                 goto nla_put_failure;
1562                 }
1563                 CMD(start_p2p_device, START_P2P_DEVICE);
1564                 CMD(set_mcast_rate, SET_MCAST_RATE);
1565 #ifdef CONFIG_NL80211_TESTMODE
1566                 CMD(testmode_cmd, TESTMODE);
1567 #endif
1568                 if (state->split) {
1569                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1570                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1571                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1572                                 CMD(channel_switch, CHANNEL_SWITCH);
1573                         CMD(set_qos_map, SET_QOS_MAP);
1574                         if (rdev->wiphy.features &
1575                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1576                                 CMD(add_tx_ts, ADD_TX_TS);
1577                 }
1578                 /* add into the if now */
1579 #undef CMD
1580
1581                 if (rdev->ops->connect || rdev->ops->auth) {
1582                         i++;
1583                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1584                                 goto nla_put_failure;
1585                 }
1586
1587                 if (rdev->ops->disconnect || rdev->ops->deauth) {
1588                         i++;
1589                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1590                                 goto nla_put_failure;
1591                 }
1592
1593                 nla_nest_end(msg, nl_cmds);
1594                 state->split_start++;
1595                 if (state->split)
1596                         break;
1597         case 5:
1598                 if (rdev->ops->remain_on_channel &&
1599                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1600                     nla_put_u32(msg,
1601                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1602                                 rdev->wiphy.max_remain_on_channel_duration))
1603                         goto nla_put_failure;
1604
1605                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1606                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1607                         goto nla_put_failure;
1608
1609                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1610                         goto nla_put_failure;
1611                 state->split_start++;
1612                 if (state->split)
1613                         break;
1614         case 6:
1615 #ifdef CONFIG_PM
1616                 if (nl80211_send_wowlan(msg, rdev, state->split))
1617                         goto nla_put_failure;
1618                 state->split_start++;
1619                 if (state->split)
1620                         break;
1621 #else
1622                 state->split_start++;
1623 #endif
1624         case 7:
1625                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1626                                         rdev->wiphy.software_iftypes))
1627                         goto nla_put_failure;
1628
1629                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1630                                                    state->split))
1631                         goto nla_put_failure;
1632
1633                 state->split_start++;
1634                 if (state->split)
1635                         break;
1636         case 8:
1637                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1638                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1639                                 rdev->wiphy.ap_sme_capa))
1640                         goto nla_put_failure;
1641
1642                 features = rdev->wiphy.features;
1643                 /*
1644                  * We can only add the per-channel limit information if the
1645                  * dump is split, otherwise it makes it too big. Therefore
1646                  * only advertise it in that case.
1647                  */
1648                 if (state->split)
1649                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1650                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1651                         goto nla_put_failure;
1652
1653                 if (rdev->wiphy.ht_capa_mod_mask &&
1654                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1655                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1656                             rdev->wiphy.ht_capa_mod_mask))
1657                         goto nla_put_failure;
1658
1659                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1660                     rdev->wiphy.max_acl_mac_addrs &&
1661                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1662                                 rdev->wiphy.max_acl_mac_addrs))
1663                         goto nla_put_failure;
1664
1665                 /*
1666                  * Any information below this point is only available to
1667                  * applications that can deal with it being split. This
1668                  * helps ensure that newly added capabilities don't break
1669                  * older tools by overrunning their buffers.
1670                  *
1671                  * We still increment split_start so that in the split
1672                  * case we'll continue with more data in the next round,
1673                  * but break unconditionally so unsplit data stops here.
1674                  */
1675                 if (state->split)
1676                         state->split_start++;
1677                 else
1678                         state->split_start = 0;
1679                 break;
1680         case 9:
1681                 if (rdev->wiphy.extended_capabilities &&
1682                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1683                              rdev->wiphy.extended_capabilities_len,
1684                              rdev->wiphy.extended_capabilities) ||
1685                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1686                              rdev->wiphy.extended_capabilities_len,
1687                              rdev->wiphy.extended_capabilities_mask)))
1688                         goto nla_put_failure;
1689
1690                 if (rdev->wiphy.vht_capa_mod_mask &&
1691                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1692                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1693                             rdev->wiphy.vht_capa_mod_mask))
1694                         goto nla_put_failure;
1695
1696                 state->split_start++;
1697                 break;
1698         case 10:
1699                 if (nl80211_send_coalesce(msg, rdev))
1700                         goto nla_put_failure;
1701
1702                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1703                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1704                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1705                         goto nla_put_failure;
1706
1707                 if (rdev->wiphy.max_ap_assoc_sta &&
1708                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1709                                 rdev->wiphy.max_ap_assoc_sta))
1710                         goto nla_put_failure;
1711
1712                 state->split_start++;
1713                 break;
1714         case 11:
1715                 if (rdev->wiphy.n_vendor_commands) {
1716                         const struct nl80211_vendor_cmd_info *info;
1717                         struct nlattr *nested;
1718
1719                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1720                         if (!nested)
1721                                 goto nla_put_failure;
1722
1723                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1724                                 info = &rdev->wiphy.vendor_commands[i].info;
1725                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1726                                         goto nla_put_failure;
1727                         }
1728                         nla_nest_end(msg, nested);
1729                 }
1730
1731                 if (rdev->wiphy.n_vendor_events) {
1732                         const struct nl80211_vendor_cmd_info *info;
1733                         struct nlattr *nested;
1734
1735                         nested = nla_nest_start(msg,
1736                                                 NL80211_ATTR_VENDOR_EVENTS);
1737                         if (!nested)
1738                                 goto nla_put_failure;
1739
1740                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1741                                 info = &rdev->wiphy.vendor_events[i];
1742                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1743                                         goto nla_put_failure;
1744                         }
1745                         nla_nest_end(msg, nested);
1746                 }
1747                 state->split_start++;
1748                 break;
1749         case 12:
1750                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1751                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1752                                rdev->wiphy.max_num_csa_counters))
1753                         goto nla_put_failure;
1754
1755                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1756                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1757                         goto nla_put_failure;
1758
1759                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1760                             sizeof(rdev->wiphy.ext_features),
1761                             rdev->wiphy.ext_features))
1762                         goto nla_put_failure;
1763
1764                 /* done */
1765                 state->split_start = 0;
1766                 break;
1767         }
1768  finish:
1769         genlmsg_end(msg, hdr);
1770         return 0;
1771
1772  nla_put_failure:
1773         genlmsg_cancel(msg, hdr);
1774         return -EMSGSIZE;
1775 }
1776
1777 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1778                                     struct netlink_callback *cb,
1779                                     struct nl80211_dump_wiphy_state *state)
1780 {
1781         struct nlattr **tb = nl80211_fam.attrbuf;
1782         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1783                               tb, nl80211_fam.maxattr, nl80211_policy);
1784         /* ignore parse errors for backward compatibility */
1785         if (ret)
1786                 return 0;
1787
1788         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1789         if (tb[NL80211_ATTR_WIPHY])
1790                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1791         if (tb[NL80211_ATTR_WDEV])
1792                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1793         if (tb[NL80211_ATTR_IFINDEX]) {
1794                 struct net_device *netdev;
1795                 struct cfg80211_registered_device *rdev;
1796                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1797
1798                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1799                 if (!netdev)
1800                         return -ENODEV;
1801                 if (netdev->ieee80211_ptr) {
1802                         rdev = wiphy_to_rdev(
1803                                 netdev->ieee80211_ptr->wiphy);
1804                         state->filter_wiphy = rdev->wiphy_idx;
1805                 }
1806         }
1807
1808         return 0;
1809 }
1810
1811 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1812 {
1813         int idx = 0, ret;
1814         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1815         struct cfg80211_registered_device *rdev;
1816
1817         rtnl_lock();
1818         if (!state) {
1819                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1820                 if (!state) {
1821                         rtnl_unlock();
1822                         return -ENOMEM;
1823                 }
1824                 state->filter_wiphy = -1;
1825                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1826                 if (ret) {
1827                         kfree(state);
1828                         rtnl_unlock();
1829                         return ret;
1830                 }
1831                 cb->args[0] = (long)state;
1832         }
1833
1834         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1835                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1836                         continue;
1837                 if (++idx <= state->start)
1838                         continue;
1839                 if (state->filter_wiphy != -1 &&
1840                     state->filter_wiphy != rdev->wiphy_idx)
1841                         continue;
1842                 /* attempt to fit multiple wiphy data chunks into the skb */
1843                 do {
1844                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1845                                                  skb,
1846                                                  NETLINK_CB(cb->skb).portid,
1847                                                  cb->nlh->nlmsg_seq,
1848                                                  NLM_F_MULTI, state);
1849                         if (ret < 0) {
1850                                 /*
1851                                  * If sending the wiphy data didn't fit (ENOBUFS
1852                                  * or EMSGSIZE returned), this SKB is still
1853                                  * empty (so it's not too big because another
1854                                  * wiphy dataset is already in the skb) and
1855                                  * we've not tried to adjust the dump allocation
1856                                  * yet ... then adjust the alloc size to be
1857                                  * bigger, and return 1 but with the empty skb.
1858                                  * This results in an empty message being RX'ed
1859                                  * in userspace, but that is ignored.
1860                                  *
1861                                  * We can then retry with the larger buffer.
1862                                  */
1863                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1864                                     !skb->len && !state->split &&
1865                                     cb->min_dump_alloc < 4096) {
1866                                         cb->min_dump_alloc = 4096;
1867                                         state->split_start = 0;
1868                                         rtnl_unlock();
1869                                         return 1;
1870                                 }
1871                                 idx--;
1872                                 break;
1873                         }
1874                 } while (state->split_start > 0);
1875                 break;
1876         }
1877         rtnl_unlock();
1878
1879         state->start = idx;
1880
1881         return skb->len;
1882 }
1883
1884 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
1885 {
1886         kfree((void *)cb->args[0]);
1887         return 0;
1888 }
1889
1890 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1891 {
1892         struct sk_buff *msg;
1893         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1894         struct nl80211_dump_wiphy_state state = {};
1895
1896         msg = nlmsg_new(4096, GFP_KERNEL);
1897         if (!msg)
1898                 return -ENOMEM;
1899
1900         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
1901                                info->snd_portid, info->snd_seq, 0,
1902                                &state) < 0) {
1903                 nlmsg_free(msg);
1904                 return -ENOBUFS;
1905         }
1906
1907         return genlmsg_reply(msg, info);
1908 }
1909
1910 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1911         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1912         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1913         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1914         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1915         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1916 };
1917
1918 static int parse_txq_params(struct nlattr *tb[],
1919                             struct ieee80211_txq_params *txq_params)
1920 {
1921         u8 ac;
1922
1923         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1924             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1925             !tb[NL80211_TXQ_ATTR_AIFS])
1926                 return -EINVAL;
1927
1928         ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1929         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1930         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1931         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1932         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1933
1934         if (ac >= NL80211_NUM_ACS)
1935                 return -EINVAL;
1936         txq_params->ac = array_index_nospec(ac, NL80211_NUM_ACS);
1937         return 0;
1938 }
1939
1940 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1941 {
1942         /*
1943          * You can only set the channel explicitly for WDS interfaces,
1944          * all others have their channel managed via their respective
1945          * "establish a connection" command (connect, join, ...)
1946          *
1947          * For AP/GO and mesh mode, the channel can be set with the
1948          * channel userspace API, but is only stored and passed to the
1949          * low-level driver when the AP starts or the mesh is joined.
1950          * This is for backward compatibility, userspace can also give
1951          * the channel in the start-ap or join-mesh commands instead.
1952          *
1953          * Monitors are special as they are normally slaved to
1954          * whatever else is going on, so they have their own special
1955          * operation to set the monitor channel if possible.
1956          */
1957         return !wdev ||
1958                 wdev->iftype == NL80211_IFTYPE_AP ||
1959                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1960                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1961                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1962 }
1963
1964 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1965                                  struct genl_info *info,
1966                                  struct cfg80211_chan_def *chandef)
1967 {
1968         u32 control_freq;
1969
1970         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1971                 return -EINVAL;
1972
1973         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1974
1975         memset(chandef, 0, sizeof(*chandef));
1976
1977         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1978         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1979         chandef->center_freq1 = control_freq;
1980         chandef->center_freq2 = 0;
1981
1982         /* Primary channel not allowed */
1983         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1984                 return -EINVAL;
1985
1986         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1987                 enum nl80211_channel_type chantype;
1988
1989                 chantype = nla_get_u32(
1990                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1991
1992                 switch (chantype) {
1993                 case NL80211_CHAN_NO_HT:
1994                 case NL80211_CHAN_HT20:
1995                 case NL80211_CHAN_HT40PLUS:
1996                 case NL80211_CHAN_HT40MINUS:
1997                         cfg80211_chandef_create(chandef, chandef->chan,
1998                                                 chantype);
1999                         break;
2000                 default:
2001                         return -EINVAL;
2002                 }
2003         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2004                 chandef->width =
2005                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2006                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2007                         chandef->center_freq1 =
2008                                 nla_get_u32(
2009                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2010                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2011                         chandef->center_freq2 =
2012                                 nla_get_u32(
2013                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2014         }
2015
2016         if (!cfg80211_chandef_valid(chandef))
2017                 return -EINVAL;
2018
2019         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2020                                      IEEE80211_CHAN_DISABLED))
2021                 return -EINVAL;
2022
2023         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2024              chandef->width == NL80211_CHAN_WIDTH_10) &&
2025             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2026                 return -EINVAL;
2027
2028         return 0;
2029 }
2030
2031 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2032                                  struct net_device *dev,
2033                                  struct genl_info *info)
2034 {
2035         struct cfg80211_chan_def chandef;
2036         int result;
2037         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2038         struct wireless_dev *wdev = NULL;
2039
2040         if (dev)
2041                 wdev = dev->ieee80211_ptr;
2042         if (!nl80211_can_set_dev_channel(wdev))
2043                 return -EOPNOTSUPP;
2044         if (wdev)
2045                 iftype = wdev->iftype;
2046
2047         result = nl80211_parse_chandef(rdev, info, &chandef);
2048         if (result)
2049                 return result;
2050
2051         switch (iftype) {
2052         case NL80211_IFTYPE_AP:
2053         case NL80211_IFTYPE_P2P_GO:
2054                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2055                                                    iftype)) {
2056                         result = -EINVAL;
2057                         break;
2058                 }
2059                 if (wdev->beacon_interval) {
2060                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2061                             !(rdev->wiphy.features &
2062                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2063                                 result = -EBUSY;
2064                                 break;
2065                         }
2066
2067                         /* Only allow dynamic channel width changes */
2068                         if (chandef.chan != wdev->preset_chandef.chan) {
2069                                 result = -EBUSY;
2070                                 break;
2071                         }
2072                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2073                         if (result)
2074                                 break;
2075                 }
2076                 wdev->preset_chandef = chandef;
2077                 result = 0;
2078                 break;
2079         case NL80211_IFTYPE_MESH_POINT:
2080                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2081                 break;
2082         case NL80211_IFTYPE_MONITOR:
2083                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2084                 break;
2085         default:
2086                 result = -EINVAL;
2087         }
2088
2089         return result;
2090 }
2091
2092 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2093 {
2094         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2095         struct net_device *netdev = info->user_ptr[1];
2096
2097         return __nl80211_set_channel(rdev, netdev, info);
2098 }
2099
2100 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2101 {
2102         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2103         struct net_device *dev = info->user_ptr[1];
2104         struct wireless_dev *wdev = dev->ieee80211_ptr;
2105         const u8 *bssid;
2106
2107         if (!info->attrs[NL80211_ATTR_MAC])
2108                 return -EINVAL;
2109
2110         if (netif_running(dev))
2111                 return -EBUSY;
2112
2113         if (!rdev->ops->set_wds_peer)
2114                 return -EOPNOTSUPP;
2115
2116         if (wdev->iftype != NL80211_IFTYPE_WDS)
2117                 return -EOPNOTSUPP;
2118
2119         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2120         return rdev_set_wds_peer(rdev, dev, bssid);
2121 }
2122
2123
2124 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2125 {
2126         struct cfg80211_registered_device *rdev;
2127         struct net_device *netdev = NULL;
2128         struct wireless_dev *wdev;
2129         int result = 0, rem_txq_params = 0;
2130         struct nlattr *nl_txq_params;
2131         u32 changed;
2132         u8 retry_short = 0, retry_long = 0;
2133         u32 frag_threshold = 0, rts_threshold = 0;
2134         u8 coverage_class = 0;
2135
2136         ASSERT_RTNL();
2137
2138         /*
2139          * Try to find the wiphy and netdev. Normally this
2140          * function shouldn't need the netdev, but this is
2141          * done for backward compatibility -- previously
2142          * setting the channel was done per wiphy, but now
2143          * it is per netdev. Previous userland like hostapd
2144          * also passed a netdev to set_wiphy, so that it is
2145          * possible to let that go to the right netdev!
2146          */
2147
2148         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2149                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2150
2151                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2152                 if (netdev && netdev->ieee80211_ptr)
2153                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2154                 else
2155                         netdev = NULL;
2156         }
2157
2158         if (!netdev) {
2159                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2160                                                   info->attrs);
2161                 if (IS_ERR(rdev))
2162                         return PTR_ERR(rdev);
2163                 wdev = NULL;
2164                 netdev = NULL;
2165                 result = 0;
2166         } else
2167                 wdev = netdev->ieee80211_ptr;
2168
2169         /*
2170          * end workaround code, by now the rdev is available
2171          * and locked, and wdev may or may not be NULL.
2172          */
2173
2174         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2175                 result = cfg80211_dev_rename(
2176                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2177
2178         if (result)
2179                 return result;
2180
2181         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2182                 struct ieee80211_txq_params txq_params;
2183                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2184
2185                 if (!rdev->ops->set_txq_params)
2186                         return -EOPNOTSUPP;
2187
2188                 if (!netdev)
2189                         return -EINVAL;
2190
2191                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2192                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2193                         return -EINVAL;
2194
2195                 if (!netif_running(netdev))
2196                         return -ENETDOWN;
2197
2198                 nla_for_each_nested(nl_txq_params,
2199                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2200                                     rem_txq_params) {
2201                         result = nla_parse(tb, NL80211_TXQ_ATTR_MAX,
2202                                            nla_data(nl_txq_params),
2203                                            nla_len(nl_txq_params),
2204                                            txq_params_policy);
2205                         if (result)
2206                                 return result;
2207                         result = parse_txq_params(tb, &txq_params);
2208                         if (result)
2209                                 return result;
2210
2211                         result = rdev_set_txq_params(rdev, netdev,
2212                                                      &txq_params);
2213                         if (result)
2214                                 return result;
2215                 }
2216         }
2217
2218         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2219                 result = __nl80211_set_channel(
2220                         rdev,
2221                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2222                         info);
2223                 if (result)
2224                         return result;
2225         }
2226
2227         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2228                 struct wireless_dev *txp_wdev = wdev;
2229                 enum nl80211_tx_power_setting type;
2230                 int idx, mbm = 0;
2231
2232                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2233                         txp_wdev = NULL;
2234
2235                 if (!rdev->ops->set_tx_power)
2236                         return -EOPNOTSUPP;
2237
2238                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2239                 type = nla_get_u32(info->attrs[idx]);
2240
2241                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2242                     (type != NL80211_TX_POWER_AUTOMATIC))
2243                         return -EINVAL;
2244
2245                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2246                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2247                         mbm = nla_get_u32(info->attrs[idx]);
2248                 }
2249
2250                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2251                 if (result)
2252                         return result;
2253         }
2254
2255         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2256             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2257                 u32 tx_ant, rx_ant;
2258                 if ((!rdev->wiphy.available_antennas_tx &&
2259                      !rdev->wiphy.available_antennas_rx) ||
2260                     !rdev->ops->set_antenna)
2261                         return -EOPNOTSUPP;
2262
2263                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2264                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2265
2266                 /* reject antenna configurations which don't match the
2267                  * available antenna masks, except for the "all" mask */
2268                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2269                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2270                         return -EINVAL;
2271
2272                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2273                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2274
2275                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2276                 if (result)
2277                         return result;
2278         }
2279
2280         changed = 0;
2281
2282         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2283                 retry_short = nla_get_u8(
2284                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2285                 if (retry_short == 0)
2286                         return -EINVAL;
2287
2288                 changed |= WIPHY_PARAM_RETRY_SHORT;
2289         }
2290
2291         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2292                 retry_long = nla_get_u8(
2293                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2294                 if (retry_long == 0)
2295                         return -EINVAL;
2296
2297                 changed |= WIPHY_PARAM_RETRY_LONG;
2298         }
2299
2300         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2301                 frag_threshold = nla_get_u32(
2302                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2303                 if (frag_threshold < 256)
2304                         return -EINVAL;
2305
2306                 if (frag_threshold != (u32) -1) {
2307                         /*
2308                          * Fragments (apart from the last one) are required to
2309                          * have even length. Make the fragmentation code
2310                          * simpler by stripping LSB should someone try to use
2311                          * odd threshold value.
2312                          */
2313                         frag_threshold &= ~0x1;
2314                 }
2315                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2316         }
2317
2318         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2319                 rts_threshold = nla_get_u32(
2320                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2321                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2322         }
2323
2324         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2325                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2326                         return -EINVAL;
2327
2328                 coverage_class = nla_get_u8(
2329                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2330                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2331         }
2332
2333         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2334                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2335                         return -EOPNOTSUPP;
2336
2337                 changed |= WIPHY_PARAM_DYN_ACK;
2338         }
2339
2340         if (changed) {
2341                 u8 old_retry_short, old_retry_long;
2342                 u32 old_frag_threshold, old_rts_threshold;
2343                 u8 old_coverage_class;
2344
2345                 if (!rdev->ops->set_wiphy_params)
2346                         return -EOPNOTSUPP;
2347
2348                 old_retry_short = rdev->wiphy.retry_short;
2349                 old_retry_long = rdev->wiphy.retry_long;
2350                 old_frag_threshold = rdev->wiphy.frag_threshold;
2351                 old_rts_threshold = rdev->wiphy.rts_threshold;
2352                 old_coverage_class = rdev->wiphy.coverage_class;
2353
2354                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2355                         rdev->wiphy.retry_short = retry_short;
2356                 if (changed & WIPHY_PARAM_RETRY_LONG)
2357                         rdev->wiphy.retry_long = retry_long;
2358                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2359                         rdev->wiphy.frag_threshold = frag_threshold;
2360                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2361                         rdev->wiphy.rts_threshold = rts_threshold;
2362                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2363                         rdev->wiphy.coverage_class = coverage_class;
2364
2365                 result = rdev_set_wiphy_params(rdev, changed);
2366                 if (result) {
2367                         rdev->wiphy.retry_short = old_retry_short;
2368                         rdev->wiphy.retry_long = old_retry_long;
2369                         rdev->wiphy.frag_threshold = old_frag_threshold;
2370                         rdev->wiphy.rts_threshold = old_rts_threshold;
2371                         rdev->wiphy.coverage_class = old_coverage_class;
2372                         return result;
2373                 }
2374         }
2375         return 0;
2376 }
2377
2378 static inline u64 wdev_id(struct wireless_dev *wdev)
2379 {
2380         return (u64)wdev->identifier |
2381                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2382 }
2383
2384 static int nl80211_send_chandef(struct sk_buff *msg,
2385                                 const struct cfg80211_chan_def *chandef)
2386 {
2387         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2388                 return -EINVAL;
2389
2390         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2391                         chandef->chan->center_freq))
2392                 return -ENOBUFS;
2393         switch (chandef->width) {
2394         case NL80211_CHAN_WIDTH_20_NOHT:
2395         case NL80211_CHAN_WIDTH_20:
2396         case NL80211_CHAN_WIDTH_40:
2397                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2398                                 cfg80211_get_chandef_type(chandef)))
2399                         return -ENOBUFS;
2400                 break;
2401         default:
2402                 break;
2403         }
2404         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2405                 return -ENOBUFS;
2406         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2407                 return -ENOBUFS;
2408         if (chandef->center_freq2 &&
2409             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2410                 return -ENOBUFS;
2411         return 0;
2412 }
2413
2414 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2415                               struct cfg80211_registered_device *rdev,
2416                               struct wireless_dev *wdev, bool removal)
2417 {
2418         struct net_device *dev = wdev->netdev;
2419         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2420         void *hdr;
2421
2422         if (removal)
2423                 cmd = NL80211_CMD_DEL_INTERFACE;
2424
2425         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2426         if (!hdr)
2427                 return -1;
2428
2429         if (dev &&
2430             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2431              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2432                 goto nla_put_failure;
2433
2434         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2435             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2436             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2437             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2438             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2439                         rdev->devlist_generation ^
2440                         (cfg80211_rdev_list_generation << 2)))
2441                 goto nla_put_failure;
2442
2443         if (rdev->ops->get_channel) {
2444                 int ret;
2445                 struct cfg80211_chan_def chandef = {};
2446
2447                 ret = rdev_get_channel(rdev, wdev, &chandef);
2448                 if (ret == 0) {
2449                         if (nl80211_send_chandef(msg, &chandef))
2450                                 goto nla_put_failure;
2451                 }
2452         }
2453
2454         if (rdev->ops->get_tx_power) {
2455                 int dbm, ret;
2456
2457                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2458                 if (ret == 0 &&
2459                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2460                                 DBM_TO_MBM(dbm)))
2461                         goto nla_put_failure;
2462         }
2463
2464         if (wdev->ssid_len) {
2465                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2466                         goto nla_put_failure;
2467         }
2468
2469         genlmsg_end(msg, hdr);
2470         return 0;
2471
2472  nla_put_failure:
2473         genlmsg_cancel(msg, hdr);
2474         return -EMSGSIZE;
2475 }
2476
2477 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2478 {
2479         int wp_idx = 0;
2480         int if_idx = 0;
2481         int wp_start = cb->args[0];
2482         int if_start = cb->args[1];
2483         struct cfg80211_registered_device *rdev;
2484         struct wireless_dev *wdev;
2485
2486         rtnl_lock();
2487         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2488                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2489                         continue;
2490                 if (wp_idx < wp_start) {
2491                         wp_idx++;
2492                         continue;
2493                 }
2494                 if_idx = 0;
2495
2496                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2497                         if (if_idx < if_start) {
2498                                 if_idx++;
2499                                 continue;
2500                         }
2501                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2502                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2503                                                rdev, wdev, false) < 0) {
2504                                 goto out;
2505                         }
2506                         if_idx++;
2507                 }
2508
2509                 wp_idx++;
2510         }
2511  out:
2512         rtnl_unlock();
2513
2514         cb->args[0] = wp_idx;
2515         cb->args[1] = if_idx;
2516
2517         return skb->len;
2518 }
2519
2520 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2521 {
2522         struct sk_buff *msg;
2523         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2524         struct wireless_dev *wdev = info->user_ptr[1];
2525
2526         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2527         if (!msg)
2528                 return -ENOMEM;
2529
2530         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2531                                rdev, wdev, false) < 0) {
2532                 nlmsg_free(msg);
2533                 return -ENOBUFS;
2534         }
2535
2536         return genlmsg_reply(msg, info);
2537 }
2538
2539 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2540         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2541         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2542         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2543         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2544         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2545         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2546 };
2547
2548 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2549 {
2550         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2551         int flag;
2552
2553         *mntrflags = 0;
2554
2555         if (!nla)
2556                 return -EINVAL;
2557
2558         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2559                              nla, mntr_flags_policy))
2560                 return -EINVAL;
2561
2562         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2563                 if (flags[flag])
2564                         *mntrflags |= (1<<flag);
2565
2566         return 0;
2567 }
2568
2569 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2570                                struct net_device *netdev, u8 use_4addr,
2571                                enum nl80211_iftype iftype)
2572 {
2573         if (!use_4addr) {
2574                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2575                         return -EBUSY;
2576                 return 0;
2577         }
2578
2579         switch (iftype) {
2580         case NL80211_IFTYPE_AP_VLAN:
2581                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2582                         return 0;
2583                 break;
2584         case NL80211_IFTYPE_STATION:
2585                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2586                         return 0;
2587                 break;
2588         default:
2589                 break;
2590         }
2591
2592         return -EOPNOTSUPP;
2593 }
2594
2595 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2596 {
2597         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2598         struct vif_params params;
2599         int err;
2600         enum nl80211_iftype otype, ntype;
2601         struct net_device *dev = info->user_ptr[1];
2602         u32 _flags, *flags = NULL;
2603         bool change = false;
2604
2605         memset(&params, 0, sizeof(params));
2606
2607         otype = ntype = dev->ieee80211_ptr->iftype;
2608
2609         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2610                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2611                 if (otype != ntype)
2612                         change = true;
2613                 if (ntype > NL80211_IFTYPE_MAX)
2614                         return -EINVAL;
2615         }
2616
2617         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2618                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2619
2620                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2621                         return -EINVAL;
2622                 if (netif_running(dev))
2623                         return -EBUSY;
2624
2625                 wdev_lock(wdev);
2626                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2627                              IEEE80211_MAX_MESH_ID_LEN);
2628                 wdev->mesh_id_up_len =
2629                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2630                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2631                        wdev->mesh_id_up_len);
2632                 wdev_unlock(wdev);
2633         }
2634
2635         if (info->attrs[NL80211_ATTR_4ADDR]) {
2636                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2637                 change = true;
2638                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2639                 if (err)
2640                         return err;
2641         } else {
2642                 params.use_4addr = -1;
2643         }
2644
2645         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2646                 if (ntype != NL80211_IFTYPE_MONITOR)
2647                         return -EINVAL;
2648                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2649                                           &_flags);
2650                 if (err)
2651                         return err;
2652
2653                 flags = &_flags;
2654                 change = true;
2655         }
2656
2657         if (flags && (*flags & MONITOR_FLAG_ACTIVE) &&
2658             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2659                 return -EOPNOTSUPP;
2660
2661         if (change)
2662                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2663         else
2664                 err = 0;
2665
2666         if (!err && params.use_4addr != -1)
2667                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2668
2669         return err;
2670 }
2671
2672 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2673 {
2674         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2675         struct vif_params params;
2676         struct wireless_dev *wdev;
2677         struct sk_buff *msg, *event;
2678         int err;
2679         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2680         u32 flags;
2681
2682         /* to avoid failing a new interface creation due to pending removal */
2683         cfg80211_destroy_ifaces(rdev);
2684
2685         memset(&params, 0, sizeof(params));
2686
2687         if (!info->attrs[NL80211_ATTR_IFNAME])
2688                 return -EINVAL;
2689
2690         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2691                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2692                 if (type > NL80211_IFTYPE_MAX)
2693                         return -EINVAL;
2694         }
2695
2696         if (!rdev->ops->add_virtual_intf ||
2697             !(rdev->wiphy.interface_modes & (1 << type)))
2698                 return -EOPNOTSUPP;
2699
2700         if ((type == NL80211_IFTYPE_P2P_DEVICE ||
2701              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2702             info->attrs[NL80211_ATTR_MAC]) {
2703                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2704                            ETH_ALEN);
2705                 if (!is_valid_ether_addr(params.macaddr))
2706                         return -EADDRNOTAVAIL;
2707         }
2708
2709         if (info->attrs[NL80211_ATTR_4ADDR]) {
2710                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2711                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2712                 if (err)
2713                         return err;
2714         }
2715
2716         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2717                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2718                                   &flags);
2719
2720         if (!err && (flags & MONITOR_FLAG_ACTIVE) &&
2721             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2722                 return -EOPNOTSUPP;
2723
2724         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2725         if (!msg)
2726                 return -ENOMEM;
2727
2728         wdev = rdev_add_virtual_intf(rdev,
2729                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2730                                 NET_NAME_USER, type, err ? NULL : &flags,
2731                                 &params);
2732         if (WARN_ON(!wdev)) {
2733                 nlmsg_free(msg);
2734                 return -EPROTO;
2735         } else if (IS_ERR(wdev)) {
2736                 nlmsg_free(msg);
2737                 return PTR_ERR(wdev);
2738         }
2739
2740         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2741                 wdev->owner_nlportid = info->snd_portid;
2742
2743         switch (type) {
2744         case NL80211_IFTYPE_MESH_POINT:
2745                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2746                         break;
2747                 wdev_lock(wdev);
2748                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2749                              IEEE80211_MAX_MESH_ID_LEN);
2750                 wdev->mesh_id_up_len =
2751                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2752                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2753                        wdev->mesh_id_up_len);
2754                 wdev_unlock(wdev);
2755                 break;
2756         case NL80211_IFTYPE_P2P_DEVICE:
2757                 /*
2758                  * P2P Device doesn't have a netdev, so doesn't go
2759                  * through the netdev notifier and must be added here
2760                  */
2761                 mutex_init(&wdev->mtx);
2762                 INIT_LIST_HEAD(&wdev->event_list);
2763                 spin_lock_init(&wdev->event_lock);
2764                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2765                 spin_lock_init(&wdev->mgmt_registrations_lock);
2766
2767                 wdev->identifier = ++rdev->wdev_id;
2768                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2769                 rdev->devlist_generation++;
2770                 break;
2771         default:
2772                 break;
2773         }
2774
2775         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2776                                rdev, wdev, false) < 0) {
2777                 nlmsg_free(msg);
2778                 return -ENOBUFS;
2779         }
2780
2781         event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2782         if (event) {
2783                 if (nl80211_send_iface(event, 0, 0, 0,
2784                                        rdev, wdev, false) < 0) {
2785                         nlmsg_free(event);
2786                         goto out;
2787                 }
2788
2789                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2790                                         event, 0, NL80211_MCGRP_CONFIG,
2791                                         GFP_KERNEL);
2792         }
2793
2794 out:
2795         return genlmsg_reply(msg, info);
2796 }
2797
2798 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2799 {
2800         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2801         struct wireless_dev *wdev = info->user_ptr[1];
2802         struct sk_buff *msg;
2803         int status;
2804
2805         if (!rdev->ops->del_virtual_intf)
2806                 return -EOPNOTSUPP;
2807
2808         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2809         if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) {
2810                 nlmsg_free(msg);
2811                 msg = NULL;
2812         }
2813
2814         /*
2815          * If we remove a wireless device without a netdev then clear
2816          * user_ptr[1] so that nl80211_post_doit won't dereference it
2817          * to check if it needs to do dev_put(). Otherwise it crashes
2818          * since the wdev has been freed, unlike with a netdev where
2819          * we need the dev_put() for the netdev to really be freed.
2820          */
2821         if (!wdev->netdev)
2822                 info->user_ptr[1] = NULL;
2823
2824         status = rdev_del_virtual_intf(rdev, wdev);
2825         if (status >= 0 && msg)
2826                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
2827                                         msg, 0, NL80211_MCGRP_CONFIG,
2828                                         GFP_KERNEL);
2829         else
2830                 nlmsg_free(msg);
2831
2832         return status;
2833 }
2834
2835 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2836 {
2837         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2838         struct net_device *dev = info->user_ptr[1];
2839         u16 noack_map;
2840
2841         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2842                 return -EINVAL;
2843
2844         if (!rdev->ops->set_noack_map)
2845                 return -EOPNOTSUPP;
2846
2847         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2848
2849         return rdev_set_noack_map(rdev, dev, noack_map);
2850 }
2851
2852 struct get_key_cookie {
2853         struct sk_buff *msg;
2854         int error;
2855         int idx;
2856 };
2857
2858 static void get_key_callback(void *c, struct key_params *params)
2859 {
2860         struct nlattr *key;
2861         struct get_key_cookie *cookie = c;
2862
2863         if ((params->key &&
2864              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2865                      params->key_len, params->key)) ||
2866             (params->seq &&
2867              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2868                      params->seq_len, params->seq)) ||
2869             (params->cipher &&
2870              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2871                          params->cipher)))
2872                 goto nla_put_failure;
2873
2874         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2875         if (!key)
2876                 goto nla_put_failure;
2877
2878         if ((params->key &&
2879              nla_put(cookie->msg, NL80211_KEY_DATA,
2880                      params->key_len, params->key)) ||
2881             (params->seq &&
2882              nla_put(cookie->msg, NL80211_KEY_SEQ,
2883                      params->seq_len, params->seq)) ||
2884             (params->cipher &&
2885              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2886                          params->cipher)))
2887                 goto nla_put_failure;
2888
2889         if (nla_put_u8(cookie->msg, NL80211_KEY_IDX, cookie->idx))
2890                 goto nla_put_failure;
2891
2892         nla_nest_end(cookie->msg, key);
2893
2894         return;
2895  nla_put_failure:
2896         cookie->error = 1;
2897 }
2898
2899 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2900 {
2901         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2902         int err;
2903         struct net_device *dev = info->user_ptr[1];
2904         u8 key_idx = 0;
2905         const u8 *mac_addr = NULL;
2906         bool pairwise;
2907         struct get_key_cookie cookie = {
2908                 .error = 0,
2909         };
2910         void *hdr;
2911         struct sk_buff *msg;
2912
2913         if (info->attrs[NL80211_ATTR_KEY_IDX])
2914                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2915
2916         if (key_idx > 5)
2917                 return -EINVAL;
2918
2919         if (info->attrs[NL80211_ATTR_MAC])
2920                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2921
2922         pairwise = !!mac_addr;
2923         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2924                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2925                 if (kt >= NUM_NL80211_KEYTYPES)
2926                         return -EINVAL;
2927                 if (kt != NL80211_KEYTYPE_GROUP &&
2928                     kt != NL80211_KEYTYPE_PAIRWISE)
2929                         return -EINVAL;
2930                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2931         }
2932
2933         if (!rdev->ops->get_key)
2934                 return -EOPNOTSUPP;
2935
2936         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2937                 return -ENOENT;
2938
2939         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2940         if (!msg)
2941                 return -ENOMEM;
2942
2943         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2944                              NL80211_CMD_NEW_KEY);
2945         if (!hdr)
2946                 goto nla_put_failure;
2947
2948         cookie.msg = msg;
2949         cookie.idx = key_idx;
2950
2951         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2952             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2953                 goto nla_put_failure;
2954         if (mac_addr &&
2955             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2956                 goto nla_put_failure;
2957
2958         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2959                            get_key_callback);
2960
2961         if (err)
2962                 goto free_msg;
2963
2964         if (cookie.error)
2965                 goto nla_put_failure;
2966
2967         genlmsg_end(msg, hdr);
2968         return genlmsg_reply(msg, info);
2969
2970  nla_put_failure:
2971         err = -ENOBUFS;
2972  free_msg:
2973         nlmsg_free(msg);
2974         return err;
2975 }
2976
2977 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2978 {
2979         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2980         struct key_parse key;
2981         int err;
2982         struct net_device *dev = info->user_ptr[1];
2983
2984         err = nl80211_parse_key(info, &key);
2985         if (err)
2986                 return err;
2987
2988         if (key.idx < 0)
2989                 return -EINVAL;
2990
2991         /* only support setting default key */
2992         if (!key.def && !key.defmgmt)
2993                 return -EINVAL;
2994
2995         wdev_lock(dev->ieee80211_ptr);
2996
2997         if (key.def) {
2998                 if (!rdev->ops->set_default_key) {
2999                         err = -EOPNOTSUPP;
3000                         goto out;
3001                 }
3002
3003                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3004                 if (err)
3005                         goto out;
3006
3007                 err = rdev_set_default_key(rdev, dev, key.idx,
3008                                                  key.def_uni, key.def_multi);
3009
3010                 if (err)
3011                         goto out;
3012
3013 #ifdef CONFIG_CFG80211_WEXT
3014                 dev->ieee80211_ptr->wext.default_key = key.idx;
3015 #endif
3016         } else {
3017                 if (key.def_uni || !key.def_multi) {
3018                         err = -EINVAL;
3019                         goto out;
3020                 }
3021
3022                 if (!rdev->ops->set_default_mgmt_key) {
3023                         err = -EOPNOTSUPP;
3024                         goto out;
3025                 }
3026
3027                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3028                 if (err)
3029                         goto out;
3030
3031                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3032                 if (err)
3033                         goto out;
3034
3035 #ifdef CONFIG_CFG80211_WEXT
3036                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3037 #endif
3038         }
3039
3040  out:
3041         wdev_unlock(dev->ieee80211_ptr);
3042
3043         return err;
3044 }
3045
3046 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3047 {
3048         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3049         int err;
3050         struct net_device *dev = info->user_ptr[1];
3051         struct key_parse key;
3052         const u8 *mac_addr = NULL;
3053
3054         err = nl80211_parse_key(info, &key);
3055         if (err)
3056                 return err;
3057
3058         if (!key.p.key)
3059                 return -EINVAL;
3060
3061         if (info->attrs[NL80211_ATTR_MAC])
3062                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3063
3064         if (key.type == -1) {
3065                 if (mac_addr)
3066                         key.type = NL80211_KEYTYPE_PAIRWISE;
3067                 else
3068                         key.type = NL80211_KEYTYPE_GROUP;
3069         }
3070
3071         /* for now */
3072         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3073             key.type != NL80211_KEYTYPE_GROUP)
3074                 return -EINVAL;
3075
3076         if (!rdev->ops->add_key)
3077                 return -EOPNOTSUPP;
3078
3079         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3080                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3081                                            mac_addr))
3082                 return -EINVAL;
3083
3084         wdev_lock(dev->ieee80211_ptr);
3085         err = nl80211_key_allowed(dev->ieee80211_ptr);
3086         if (!err)
3087                 err = rdev_add_key(rdev, dev, key.idx,
3088                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3089                                     mac_addr, &key.p);
3090         wdev_unlock(dev->ieee80211_ptr);
3091
3092         return err;
3093 }
3094
3095 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3096 {
3097         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3098         int err;
3099         struct net_device *dev = info->user_ptr[1];
3100         u8 *mac_addr = NULL;
3101         struct key_parse key;
3102
3103         err = nl80211_parse_key(info, &key);
3104         if (err)
3105                 return err;
3106
3107         if (key.idx < 0)
3108                 return -EINVAL;
3109
3110         if (info->attrs[NL80211_ATTR_MAC])
3111                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3112
3113         if (key.type == -1) {
3114                 if (mac_addr)
3115                         key.type = NL80211_KEYTYPE_PAIRWISE;
3116                 else
3117                         key.type = NL80211_KEYTYPE_GROUP;
3118         }
3119
3120         /* for now */
3121         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3122             key.type != NL80211_KEYTYPE_GROUP)
3123                 return -EINVAL;
3124
3125         if (!rdev->ops->del_key)
3126                 return -EOPNOTSUPP;
3127
3128         wdev_lock(dev->ieee80211_ptr);
3129         err = nl80211_key_allowed(dev->ieee80211_ptr);
3130
3131         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3132             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3133                 err = -ENOENT;
3134
3135         if (!err)
3136                 err = rdev_del_key(rdev, dev, key.idx,
3137                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3138                                    mac_addr);
3139
3140 #ifdef CONFIG_CFG80211_WEXT
3141         if (!err) {
3142                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3143                         dev->ieee80211_ptr->wext.default_key = -1;
3144                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3145                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3146         }
3147 #endif
3148         wdev_unlock(dev->ieee80211_ptr);
3149
3150         return err;
3151 }
3152
3153 /* This function returns an error or the number of nested attributes */
3154 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3155 {
3156         struct nlattr *attr;
3157         int n_entries = 0, tmp;
3158
3159         nla_for_each_nested(attr, nl_attr, tmp) {
3160                 if (nla_len(attr) != ETH_ALEN)
3161                         return -EINVAL;
3162
3163                 n_entries++;
3164         }
3165
3166         return n_entries;
3167 }
3168
3169 /*
3170  * This function parses ACL information and allocates memory for ACL data.
3171  * On successful return, the calling function is responsible to free the
3172  * ACL buffer returned by this function.
3173  */
3174 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3175                                                 struct genl_info *info)
3176 {
3177         enum nl80211_acl_policy acl_policy;
3178         struct nlattr *attr;
3179         struct cfg80211_acl_data *acl;
3180         int i = 0, n_entries, tmp;
3181
3182         if (!wiphy->max_acl_mac_addrs)
3183                 return ERR_PTR(-EOPNOTSUPP);
3184
3185         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3186                 return ERR_PTR(-EINVAL);
3187
3188         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3189         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3190             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3191                 return ERR_PTR(-EINVAL);
3192
3193         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3194                 return ERR_PTR(-EINVAL);
3195
3196         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3197         if (n_entries < 0)
3198                 return ERR_PTR(n_entries);
3199
3200         if (n_entries > wiphy->max_acl_mac_addrs)
3201                 return ERR_PTR(-ENOTSUPP);
3202
3203         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3204                       GFP_KERNEL);
3205         if (!acl)
3206                 return ERR_PTR(-ENOMEM);
3207
3208         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3209                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3210                 i++;
3211         }
3212
3213         acl->n_acl_entries = n_entries;
3214         acl->acl_policy = acl_policy;
3215
3216         return acl;
3217 }
3218
3219 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3220 {
3221         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3222         struct net_device *dev = info->user_ptr[1];
3223         struct cfg80211_acl_data *acl;
3224         int err;
3225
3226         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3227             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3228                 return -EOPNOTSUPP;
3229
3230         if (!dev->ieee80211_ptr->beacon_interval)
3231                 return -EINVAL;
3232
3233         acl = parse_acl_data(&rdev->wiphy, info);
3234         if (IS_ERR(acl))
3235                 return PTR_ERR(acl);
3236
3237         err = rdev_set_mac_acl(rdev, dev, acl);
3238
3239         kfree(acl);
3240
3241         return err;
3242 }
3243
3244 static int nl80211_parse_beacon(struct nlattr *attrs[],
3245                                 struct cfg80211_beacon_data *bcn)
3246 {
3247         bool haveinfo = false;
3248
3249         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3250             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3251             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3252             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3253                 return -EINVAL;
3254
3255         memset(bcn, 0, sizeof(*bcn));
3256
3257         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3258                 int ret = validate_beacon_head(attrs[NL80211_ATTR_BEACON_HEAD]);
3259
3260                 if (ret)
3261                         return ret;
3262
3263                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3264                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3265                 if (!bcn->head_len)
3266                         return -EINVAL;
3267                 haveinfo = true;
3268         }
3269
3270         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3271                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3272                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3273                 haveinfo = true;
3274         }
3275
3276         if (!haveinfo)
3277                 return -EINVAL;
3278
3279         if (attrs[NL80211_ATTR_IE]) {
3280                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3281                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3282         }
3283
3284         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3285                 bcn->proberesp_ies =
3286                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3287                 bcn->proberesp_ies_len =
3288                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3289         }
3290
3291         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3292                 bcn->assocresp_ies =
3293                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3294                 bcn->assocresp_ies_len =
3295                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3296         }
3297
3298         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3299                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3300                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3301         }
3302
3303         return 0;
3304 }
3305
3306 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3307                                    struct cfg80211_ap_settings *params)
3308 {
3309         struct wireless_dev *wdev;
3310         bool ret = false;
3311
3312         list_for_each_entry(wdev, &rdev->wdev_list, list) {
3313                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3314                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3315                         continue;
3316
3317                 if (!wdev->preset_chandef.chan)
3318                         continue;
3319
3320                 params->chandef = wdev->preset_chandef;
3321                 ret = true;
3322                 break;
3323         }
3324
3325         return ret;
3326 }
3327
3328 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3329                                     enum nl80211_auth_type auth_type,
3330                                     enum nl80211_commands cmd)
3331 {
3332         if (auth_type > NL80211_AUTHTYPE_MAX)
3333                 return false;
3334
3335         switch (cmd) {
3336         case NL80211_CMD_AUTHENTICATE:
3337                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3338                     auth_type == NL80211_AUTHTYPE_SAE)
3339                         return false;
3340                 return true;
3341         case NL80211_CMD_CONNECT:
3342         case NL80211_CMD_START_AP:
3343                 /* SAE not supported yet */
3344                 if (auth_type == NL80211_AUTHTYPE_SAE)
3345                         return false;
3346                 return true;
3347         default:
3348                 return false;
3349         }
3350 }
3351
3352 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3353 {
3354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3355         struct net_device *dev = info->user_ptr[1];
3356         struct wireless_dev *wdev = dev->ieee80211_ptr;
3357         struct cfg80211_ap_settings params;
3358         int err;
3359
3360         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3361             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3362                 return -EOPNOTSUPP;
3363
3364         if (!rdev->ops->start_ap)
3365                 return -EOPNOTSUPP;
3366
3367         if (wdev->beacon_interval)
3368                 return -EALREADY;
3369
3370         memset(&params, 0, sizeof(params));
3371
3372         /* these are required for START_AP */
3373         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3374             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3375             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3376                 return -EINVAL;
3377
3378         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3379         if (err)
3380                 return err;
3381
3382         params.beacon_interval =
3383                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3384         params.dtim_period =
3385                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3386
3387         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3388         if (err)
3389                 return err;
3390
3391         /*
3392          * In theory, some of these attributes should be required here
3393          * but since they were not used when the command was originally
3394          * added, keep them optional for old user space programs to let
3395          * them continue to work with drivers that do not need the
3396          * additional information -- drivers must check!
3397          */
3398         if (info->attrs[NL80211_ATTR_SSID]) {
3399                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3400                 params.ssid_len =
3401                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3402                 if (params.ssid_len == 0 ||
3403                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3404                         return -EINVAL;
3405         }
3406
3407         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3408                 params.hidden_ssid = nla_get_u32(
3409                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3410                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3411                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3412                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3413                         return -EINVAL;
3414         }
3415
3416         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3417
3418         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3419                 params.auth_type = nla_get_u32(
3420                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3421                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3422                                              NL80211_CMD_START_AP))
3423                         return -EINVAL;
3424         } else
3425                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3426
3427         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3428                                       NL80211_MAX_NR_CIPHER_SUITES);
3429         if (err)
3430                 return err;
3431
3432         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3433                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3434                         return -EOPNOTSUPP;
3435                 params.inactivity_timeout = nla_get_u16(
3436                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3437         }
3438
3439         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3440                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3441                         return -EINVAL;
3442                 params.p2p_ctwindow =
3443                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3444                 if (params.p2p_ctwindow > 127)
3445                         return -EINVAL;
3446                 if (params.p2p_ctwindow != 0 &&
3447                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3448                         return -EINVAL;
3449         }
3450
3451         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3452                 u8 tmp;
3453
3454                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3455                         return -EINVAL;
3456                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3457                 if (tmp > 1)
3458                         return -EINVAL;
3459                 params.p2p_opp_ps = tmp;
3460                 if (params.p2p_opp_ps != 0 &&
3461                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3462                         return -EINVAL;
3463         }
3464
3465         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3466                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3467                 if (err)
3468                         return err;
3469         } else if (wdev->preset_chandef.chan) {
3470                 params.chandef = wdev->preset_chandef;
3471         } else if (!nl80211_get_ap_channel(rdev, &params))
3472                 return -EINVAL;
3473
3474         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
3475                                            wdev->iftype))
3476                 return -EINVAL;
3477
3478         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
3479                 params.smps_mode =
3480                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
3481                 switch (params.smps_mode) {
3482                 case NL80211_SMPS_OFF:
3483                         break;
3484                 case NL80211_SMPS_STATIC:
3485                         if (!(rdev->wiphy.features &
3486                               NL80211_FEATURE_STATIC_SMPS))
3487                                 return -EINVAL;
3488                         break;
3489                 case NL80211_SMPS_DYNAMIC:
3490                         if (!(rdev->wiphy.features &
3491                               NL80211_FEATURE_DYNAMIC_SMPS))
3492                                 return -EINVAL;
3493                         break;
3494                 default:
3495                         return -EINVAL;
3496                 }
3497         } else {
3498                 params.smps_mode = NL80211_SMPS_OFF;
3499         }
3500
3501         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3502                 params.acl = parse_acl_data(&rdev->wiphy, info);
3503                 if (IS_ERR(params.acl))
3504                         return PTR_ERR(params.acl);
3505         }
3506
3507         wdev_lock(wdev);
3508         err = rdev_start_ap(rdev, dev, &params);
3509         if (!err) {
3510                 wdev->preset_chandef = params.chandef;
3511                 wdev->beacon_interval = params.beacon_interval;
3512                 wdev->chandef = params.chandef;
3513                 wdev->ssid_len = params.ssid_len;
3514                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3515         }
3516         wdev_unlock(wdev);
3517
3518         kfree(params.acl);
3519
3520         return err;
3521 }
3522
3523 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3524 {
3525         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3526         struct net_device *dev = info->user_ptr[1];
3527         struct wireless_dev *wdev = dev->ieee80211_ptr;
3528         struct cfg80211_beacon_data params;
3529         int err;
3530
3531         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3532             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3533                 return -EOPNOTSUPP;
3534
3535         if (!rdev->ops->change_beacon)
3536                 return -EOPNOTSUPP;
3537
3538         if (!wdev->beacon_interval)
3539                 return -EINVAL;
3540
3541         err = nl80211_parse_beacon(info->attrs, &params);
3542         if (err)
3543                 return err;
3544
3545         wdev_lock(wdev);
3546         err = rdev_change_beacon(rdev, dev, &params);
3547         wdev_unlock(wdev);
3548
3549         return err;
3550 }
3551
3552 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3553 {
3554         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3555         struct net_device *dev = info->user_ptr[1];
3556
3557         return cfg80211_stop_ap(rdev, dev, false);
3558 }
3559
3560 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3561         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3562         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3563         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3564         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3565         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3566         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3567 };
3568
3569 static int parse_station_flags(struct genl_info *info,
3570                                enum nl80211_iftype iftype,
3571                                struct station_parameters *params)
3572 {
3573         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3574         struct nlattr *nla;
3575         int flag;
3576
3577         /*
3578          * Try parsing the new attribute first so userspace
3579          * can specify both for older kernels.
3580          */
3581         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3582         if (nla) {
3583                 struct nl80211_sta_flag_update *sta_flags;
3584
3585                 sta_flags = nla_data(nla);
3586                 params->sta_flags_mask = sta_flags->mask;
3587                 params->sta_flags_set = sta_flags->set;
3588                 params->sta_flags_set &= params->sta_flags_mask;
3589                 if ((params->sta_flags_mask |
3590                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3591                         return -EINVAL;
3592                 return 0;
3593         }
3594
3595         /* if present, parse the old attribute */
3596
3597         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3598         if (!nla)
3599                 return 0;
3600
3601         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3602                              nla, sta_flags_policy))
3603                 return -EINVAL;
3604
3605         /*
3606          * Only allow certain flags for interface types so that
3607          * other attributes are silently ignored. Remember that
3608          * this is backward compatibility code with old userspace
3609          * and shouldn't be hit in other cases anyway.
3610          */
3611         switch (iftype) {
3612         case NL80211_IFTYPE_AP:
3613         case NL80211_IFTYPE_AP_VLAN:
3614         case NL80211_IFTYPE_P2P_GO:
3615                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3616                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3617                                          BIT(NL80211_STA_FLAG_WME) |
3618                                          BIT(NL80211_STA_FLAG_MFP);
3619                 break;
3620         case NL80211_IFTYPE_P2P_CLIENT:
3621         case NL80211_IFTYPE_STATION:
3622                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3623                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3624                 break;
3625         case NL80211_IFTYPE_MESH_POINT:
3626                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3627                                          BIT(NL80211_STA_FLAG_MFP) |
3628                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3629                 break;
3630         default:
3631                 return -EINVAL;
3632         }
3633
3634         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3635                 if (flags[flag]) {
3636                         params->sta_flags_set |= (1<<flag);
3637
3638                         /* no longer support new API additions in old API */
3639                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3640                                 return -EINVAL;
3641                 }
3642         }
3643
3644         return 0;
3645 }
3646
3647 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3648                                  int attr)
3649 {
3650         struct nlattr *rate;
3651         u32 bitrate;
3652         u16 bitrate_compat;
3653         enum nl80211_attrs rate_flg;
3654
3655         rate = nla_nest_start(msg, attr);
3656         if (!rate)
3657                 return false;
3658
3659         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3660         bitrate = cfg80211_calculate_bitrate(info);
3661         /* report 16-bit bitrate only if we can */
3662         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3663         if (bitrate > 0 &&
3664             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3665                 return false;
3666         if (bitrate_compat > 0 &&
3667             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3668                 return false;
3669
3670         switch (info->bw) {
3671         case RATE_INFO_BW_5:
3672                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
3673                 break;
3674         case RATE_INFO_BW_10:
3675                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
3676                 break;
3677         default:
3678                 WARN_ON(1);
3679                 /* fall through */
3680         case RATE_INFO_BW_20:
3681                 rate_flg = 0;
3682                 break;
3683         case RATE_INFO_BW_40:
3684                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
3685                 break;
3686         case RATE_INFO_BW_80:
3687                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
3688                 break;
3689         case RATE_INFO_BW_160:
3690                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
3691                 break;
3692         }
3693
3694         if (rate_flg && nla_put_flag(msg, rate_flg))
3695                 return false;
3696
3697         if (info->flags & RATE_INFO_FLAGS_MCS) {
3698                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3699                         return false;
3700                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3701                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3702                         return false;
3703         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3704                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3705                         return false;
3706                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3707                         return false;
3708                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3709                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3710                         return false;
3711         }
3712
3713         nla_nest_end(msg, rate);
3714         return true;
3715 }
3716
3717 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
3718                                int id)
3719 {
3720         void *attr;
3721         int i = 0;
3722
3723         if (!mask)
3724                 return true;
3725
3726         attr = nla_nest_start(msg, id);
3727         if (!attr)
3728                 return false;
3729
3730         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
3731                 if (!(mask & BIT(i)))
3732                         continue;
3733
3734                 if (nla_put_u8(msg, i, signal[i]))
3735                         return false;
3736         }
3737
3738         nla_nest_end(msg, attr);
3739
3740         return true;
3741 }
3742
3743 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
3744                                 u32 seq, int flags,
3745                                 struct cfg80211_registered_device *rdev,
3746                                 struct net_device *dev,
3747                                 const u8 *mac_addr, struct station_info *sinfo)
3748 {
3749         void *hdr;
3750         struct nlattr *sinfoattr, *bss_param;
3751
3752         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
3753         if (!hdr)
3754                 return -1;
3755
3756         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3757             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3758             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3759                 goto nla_put_failure;
3760
3761         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3762         if (!sinfoattr)
3763                 goto nla_put_failure;
3764
3765 #define PUT_SINFO(attr, memb, type) do {                                \
3766         if (sinfo->filled & BIT(NL80211_STA_INFO_ ## attr) &&           \
3767             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
3768                              sinfo->memb))                              \
3769                 goto nla_put_failure;                                   \
3770         } while (0)
3771
3772         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
3773         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
3774
3775         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
3776                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
3777             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3778                         (u32)sinfo->rx_bytes))
3779                 goto nla_put_failure;
3780
3781         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
3782                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
3783             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3784                         (u32)sinfo->tx_bytes))
3785                 goto nla_put_failure;
3786
3787         PUT_SINFO(RX_BYTES64, rx_bytes, u64);
3788         PUT_SINFO(TX_BYTES64, tx_bytes, u64);
3789         PUT_SINFO(LLID, llid, u16);
3790         PUT_SINFO(PLID, plid, u16);
3791         PUT_SINFO(PLINK_STATE, plink_state, u8);
3792
3793         switch (rdev->wiphy.signal_type) {
3794         case CFG80211_SIGNAL_TYPE_MBM:
3795                 PUT_SINFO(SIGNAL, signal, u8);
3796                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
3797                 break;
3798         default:
3799                 break;
3800         }
3801         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
3802                 if (!nl80211_put_signal(msg, sinfo->chains,
3803                                         sinfo->chain_signal,
3804                                         NL80211_STA_INFO_CHAIN_SIGNAL))
3805                         goto nla_put_failure;
3806         }
3807         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
3808                 if (!nl80211_put_signal(msg, sinfo->chains,
3809                                         sinfo->chain_signal_avg,
3810                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
3811                         goto nla_put_failure;
3812         }
3813         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
3814                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3815                                           NL80211_STA_INFO_TX_BITRATE))
3816                         goto nla_put_failure;
3817         }
3818         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
3819                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3820                                           NL80211_STA_INFO_RX_BITRATE))
3821                         goto nla_put_failure;
3822         }
3823
3824         PUT_SINFO(RX_PACKETS, rx_packets, u32);
3825         PUT_SINFO(TX_PACKETS, tx_packets, u32);
3826         PUT_SINFO(TX_RETRIES, tx_retries, u32);
3827         PUT_SINFO(TX_FAILED, tx_failed, u32);
3828         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
3829         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
3830         PUT_SINFO(LOCAL_PM, local_pm, u32);
3831         PUT_SINFO(PEER_PM, peer_pm, u32);
3832         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
3833
3834         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
3835                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3836                 if (!bss_param)
3837                         goto nla_put_failure;
3838
3839                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3840                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3841                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3842                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3843                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3844                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3845                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3846                                sinfo->bss_param.dtim_period) ||
3847                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3848                                 sinfo->bss_param.beacon_interval))
3849                         goto nla_put_failure;
3850
3851                 nla_nest_end(msg, bss_param);
3852         }
3853         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
3854             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3855                     sizeof(struct nl80211_sta_flag_update),
3856                     &sinfo->sta_flags))
3857                 goto nla_put_failure;
3858
3859         PUT_SINFO(T_OFFSET, t_offset, u64);
3860         PUT_SINFO(RX_DROP_MISC, rx_dropped_misc, u64);
3861         PUT_SINFO(BEACON_RX, rx_beacon, u64);
3862         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
3863
3864 #undef PUT_SINFO
3865
3866         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
3867                 struct nlattr *tidsattr;
3868                 int tid;
3869
3870                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
3871                 if (!tidsattr)
3872                         goto nla_put_failure;
3873
3874                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
3875                         struct cfg80211_tid_stats *tidstats;
3876                         struct nlattr *tidattr;
3877
3878                         tidstats = &sinfo->pertid[tid];
3879
3880                         if (!tidstats->filled)
3881                                 continue;
3882
3883                         tidattr = nla_nest_start(msg, tid + 1);
3884                         if (!tidattr)
3885                                 goto nla_put_failure;
3886
3887 #define PUT_TIDVAL(attr, memb, type) do {                               \
3888         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
3889             nla_put_ ## type(msg, NL80211_TID_STATS_ ## attr,           \
3890                              tidstats->memb))                           \
3891                 goto nla_put_failure;                                   \
3892         } while (0)
3893
3894                         PUT_TIDVAL(RX_MSDU, rx_msdu, u64);
3895                         PUT_TIDVAL(TX_MSDU, tx_msdu, u64);
3896                         PUT_TIDVAL(TX_MSDU_RETRIES, tx_msdu_retries, u64);
3897                         PUT_TIDVAL(TX_MSDU_FAILED, tx_msdu_failed, u64);
3898
3899 #undef PUT_TIDVAL
3900                         nla_nest_end(msg, tidattr);
3901                 }
3902
3903                 nla_nest_end(msg, tidsattr);
3904         }
3905
3906         nla_nest_end(msg, sinfoattr);
3907
3908         if (sinfo->assoc_req_ies_len &&
3909             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3910                     sinfo->assoc_req_ies))
3911                 goto nla_put_failure;
3912
3913         genlmsg_end(msg, hdr);
3914         return 0;
3915
3916  nla_put_failure:
3917         genlmsg_cancel(msg, hdr);
3918         return -EMSGSIZE;
3919 }
3920
3921 static int nl80211_dump_station(struct sk_buff *skb,
3922                                 struct netlink_callback *cb)
3923 {
3924         struct station_info sinfo;
3925         struct cfg80211_registered_device *rdev;
3926         struct wireless_dev *wdev;
3927         u8 mac_addr[ETH_ALEN];
3928         int sta_idx = cb->args[2];
3929         int err;
3930
3931         rtnl_lock();
3932         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
3933         if (err)
3934                 goto out_err;
3935
3936         if (!wdev->netdev) {
3937                 err = -EINVAL;
3938                 goto out_err;
3939         }
3940
3941         if (!rdev->ops->dump_station) {
3942                 err = -EOPNOTSUPP;
3943                 goto out_err;
3944         }
3945
3946         while (1) {
3947                 memset(&sinfo, 0, sizeof(sinfo));
3948                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
3949                                         mac_addr, &sinfo);
3950                 if (err == -ENOENT)
3951                         break;
3952                 if (err)
3953                         goto out_err;
3954
3955                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
3956                                 NETLINK_CB(cb->skb).portid,
3957                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3958                                 rdev, wdev->netdev, mac_addr,
3959                                 &sinfo) < 0)
3960                         goto out;
3961
3962                 sta_idx++;
3963         }
3964
3965
3966  out:
3967         cb->args[2] = sta_idx;
3968         err = skb->len;
3969  out_err:
3970         rtnl_unlock();
3971
3972         return err;
3973 }
3974
3975 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3976 {
3977         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3978         struct net_device *dev = info->user_ptr[1];
3979         struct station_info sinfo;
3980         struct sk_buff *msg;
3981         u8 *mac_addr = NULL;
3982         int err;
3983
3984         memset(&sinfo, 0, sizeof(sinfo));
3985
3986         if (!info->attrs[NL80211_ATTR_MAC])
3987                 return -EINVAL;
3988
3989         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3990
3991         if (!rdev->ops->get_station)
3992                 return -EOPNOTSUPP;
3993
3994         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3995         if (err)
3996                 return err;
3997
3998         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3999         if (!msg)
4000                 return -ENOMEM;
4001
4002         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4003                                  info->snd_portid, info->snd_seq, 0,
4004                                  rdev, dev, mac_addr, &sinfo) < 0) {
4005                 nlmsg_free(msg);
4006                 return -ENOBUFS;
4007         }
4008
4009         return genlmsg_reply(msg, info);
4010 }
4011
4012 int cfg80211_check_station_change(struct wiphy *wiphy,
4013                                   struct station_parameters *params,
4014                                   enum cfg80211_station_type statype)
4015 {
4016         if (params->listen_interval != -1 &&
4017             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4018                 return -EINVAL;
4019
4020         if (params->aid &&
4021             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4022             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4023                 return -EINVAL;
4024
4025         /* When you run into this, adjust the code below for the new flag */
4026         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4027
4028         switch (statype) {
4029         case CFG80211_STA_MESH_PEER_KERNEL:
4030         case CFG80211_STA_MESH_PEER_USER:
4031                 /*
4032                  * No ignoring the TDLS flag here -- the userspace mesh
4033                  * code doesn't have the bug of including TDLS in the
4034                  * mask everywhere.
4035                  */
4036                 if (params->sta_flags_mask &
4037                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4038                                   BIT(NL80211_STA_FLAG_MFP) |
4039                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4040                         return -EINVAL;
4041                 break;
4042         case CFG80211_STA_TDLS_PEER_SETUP:
4043         case CFG80211_STA_TDLS_PEER_ACTIVE:
4044                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4045                         return -EINVAL;
4046                 /* ignore since it can't change */
4047                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4048                 break;
4049         default:
4050                 /* disallow mesh-specific things */
4051                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4052                         return -EINVAL;
4053                 if (params->local_pm)
4054                         return -EINVAL;
4055                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4056                         return -EINVAL;
4057         }
4058
4059         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4060             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4061                 /* TDLS can't be set, ... */
4062                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4063                         return -EINVAL;
4064                 /*
4065                  * ... but don't bother the driver with it. This works around
4066                  * a hostapd/wpa_supplicant issue -- it always includes the
4067                  * TLDS_PEER flag in the mask even for AP mode.
4068                  */
4069                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4070         }
4071
4072         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4073             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4074                 /* reject other things that can't change */
4075                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4076                         return -EINVAL;
4077                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4078                         return -EINVAL;
4079                 if (params->supported_rates)
4080                         return -EINVAL;
4081                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4082                         return -EINVAL;
4083         }
4084
4085         if (statype != CFG80211_STA_AP_CLIENT &&
4086             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4087                 if (params->vlan)
4088                         return -EINVAL;
4089         }
4090
4091         switch (statype) {
4092         case CFG80211_STA_AP_MLME_CLIENT:
4093                 /* Use this only for authorizing/unauthorizing a station */
4094                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4095                         return -EOPNOTSUPP;
4096                 break;
4097         case CFG80211_STA_AP_CLIENT:
4098         case CFG80211_STA_AP_CLIENT_UNASSOC:
4099                 /* accept only the listed bits */
4100                 if (params->sta_flags_mask &
4101                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4102                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4103                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4104                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4105                                   BIT(NL80211_STA_FLAG_WME) |
4106                                   BIT(NL80211_STA_FLAG_MFP)))
4107                         return -EINVAL;
4108
4109                 /* but authenticated/associated only if driver handles it */
4110                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4111                     params->sta_flags_mask &
4112                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4113                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4114                         return -EINVAL;
4115                 break;
4116         case CFG80211_STA_IBSS:
4117         case CFG80211_STA_AP_STA:
4118                 /* reject any changes other than AUTHORIZED */
4119                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4120                         return -EINVAL;
4121                 break;
4122         case CFG80211_STA_TDLS_PEER_SETUP:
4123                 /* reject any changes other than AUTHORIZED or WME */
4124                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4125                                                BIT(NL80211_STA_FLAG_WME)))
4126                         return -EINVAL;
4127                 /* force (at least) rates when authorizing */
4128                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4129                     !params->supported_rates)
4130                         return -EINVAL;
4131                 break;
4132         case CFG80211_STA_TDLS_PEER_ACTIVE:
4133                 /* reject any changes */
4134                 return -EINVAL;
4135         case CFG80211_STA_MESH_PEER_KERNEL:
4136                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4137                         return -EINVAL;
4138                 break;
4139         case CFG80211_STA_MESH_PEER_USER:
4140                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4141                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4142                         return -EINVAL;
4143                 break;
4144         }
4145
4146         return 0;
4147 }
4148 EXPORT_SYMBOL(cfg80211_check_station_change);
4149
4150 /*
4151  * Get vlan interface making sure it is running and on the right wiphy.
4152  */
4153 static struct net_device *get_vlan(struct genl_info *info,
4154                                    struct cfg80211_registered_device *rdev)
4155 {
4156         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4157         struct net_device *v;
4158         int ret;
4159
4160         if (!vlanattr)
4161                 return NULL;
4162
4163         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4164         if (!v)
4165                 return ERR_PTR(-ENODEV);
4166
4167         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4168                 ret = -EINVAL;
4169                 goto error;
4170         }
4171
4172         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4173             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4174             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4175                 ret = -EINVAL;
4176                 goto error;
4177         }
4178
4179         if (!netif_running(v)) {
4180                 ret = -ENETDOWN;
4181                 goto error;
4182         }
4183
4184         return v;
4185  error:
4186         dev_put(v);
4187         return ERR_PTR(ret);
4188 }
4189
4190 static const struct nla_policy
4191 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4192         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4193         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4194 };
4195
4196 static int nl80211_parse_sta_wme(struct genl_info *info,
4197                                  struct station_parameters *params)
4198 {
4199         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4200         struct nlattr *nla;
4201         int err;
4202
4203         /* parse WME attributes if present */
4204         if (!info->attrs[NL80211_ATTR_STA_WME])
4205                 return 0;
4206
4207         nla = info->attrs[NL80211_ATTR_STA_WME];
4208         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4209                                nl80211_sta_wme_policy);
4210         if (err)
4211                 return err;
4212
4213         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4214                 params->uapsd_queues = nla_get_u8(
4215                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4216         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4217                 return -EINVAL;
4218
4219         if (tb[NL80211_STA_WME_MAX_SP])
4220                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4221
4222         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4223                 return -EINVAL;
4224
4225         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4226
4227         return 0;
4228 }
4229
4230 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4231                                       struct station_parameters *params)
4232 {
4233         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4234                 params->supported_channels =
4235                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4236                 params->supported_channels_len =
4237                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4238                 /*
4239                  * Need to include at least one (first channel, number of
4240                  * channels) tuple for each subband, and must have proper
4241                  * tuples for the rest of the data as well.
4242                  */
4243                 if (params->supported_channels_len < 2)
4244                         return -EINVAL;
4245                 if (params->supported_channels_len % 2)
4246                         return -EINVAL;
4247         }
4248
4249         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4250                 params->supported_oper_classes =
4251                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4252                 params->supported_oper_classes_len =
4253                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4254                 /*
4255                  * The value of the Length field of the Supported Operating
4256                  * Classes element is between 2 and 253.
4257                  */
4258                 if (params->supported_oper_classes_len < 2 ||
4259                     params->supported_oper_classes_len > 253)
4260                         return -EINVAL;
4261         }
4262         return 0;
4263 }
4264
4265 static int nl80211_set_station_tdls(struct genl_info *info,
4266                                     struct station_parameters *params)
4267 {
4268         int err;
4269         /* Dummy STA entry gets updated once the peer capabilities are known */
4270         if (info->attrs[NL80211_ATTR_PEER_AID])
4271                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4272         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4273                 params->ht_capa =
4274                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4275         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4276                 params->vht_capa =
4277                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4278
4279         err = nl80211_parse_sta_channel_info(info, params);
4280         if (err)
4281                 return err;
4282
4283         return nl80211_parse_sta_wme(info, params);
4284 }
4285
4286 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4287 {
4288         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4289         struct net_device *dev = info->user_ptr[1];
4290         struct station_parameters params;
4291         u8 *mac_addr;
4292         int err;
4293
4294         memset(&params, 0, sizeof(params));
4295
4296         if (!rdev->ops->change_station)
4297                 return -EOPNOTSUPP;
4298
4299         /*
4300          * AID and listen_interval properties can be set only for unassociated
4301          * station. Include these parameters here and will check them in
4302          * cfg80211_check_station_change().
4303          */
4304         if (info->attrs[NL80211_ATTR_PEER_AID])
4305                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4306
4307         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4308                 params.listen_interval =
4309                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4310         else
4311                 params.listen_interval = -1;
4312
4313         if (!info->attrs[NL80211_ATTR_MAC])
4314                 return -EINVAL;
4315
4316         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4317
4318         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4319                 params.supported_rates =
4320                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4321                 params.supported_rates_len =
4322                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4323         }
4324
4325         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4326                 params.capability =
4327                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4328                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4329         }
4330
4331         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4332                 params.ext_capab =
4333                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4334                 params.ext_capab_len =
4335                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4336         }
4337
4338         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4339                 return -EINVAL;
4340
4341         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4342                 params.plink_action =
4343                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4344                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4345                         return -EINVAL;
4346         }
4347
4348         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4349                 params.plink_state =
4350                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4351                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4352                         return -EINVAL;
4353                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4354         }
4355
4356         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4357                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4358                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4359
4360                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4361                     pm > NL80211_MESH_POWER_MAX)
4362                         return -EINVAL;
4363
4364                 params.local_pm = pm;
4365         }
4366
4367         /* Include parameters for TDLS peer (will check later) */
4368         err = nl80211_set_station_tdls(info, &params);
4369         if (err)
4370                 return err;
4371
4372         params.vlan = get_vlan(info, rdev);
4373         if (IS_ERR(params.vlan))
4374                 return PTR_ERR(params.vlan);
4375
4376         switch (dev->ieee80211_ptr->iftype) {
4377         case NL80211_IFTYPE_AP:
4378         case NL80211_IFTYPE_AP_VLAN:
4379         case NL80211_IFTYPE_P2P_GO:
4380         case NL80211_IFTYPE_P2P_CLIENT:
4381         case NL80211_IFTYPE_STATION:
4382         case NL80211_IFTYPE_ADHOC:
4383         case NL80211_IFTYPE_MESH_POINT:
4384                 break;
4385         default:
4386                 err = -EOPNOTSUPP;
4387                 goto out_put_vlan;
4388         }
4389
4390         /* driver will call cfg80211_check_station_change() */
4391         err = rdev_change_station(rdev, dev, mac_addr, &params);
4392
4393  out_put_vlan:
4394         if (params.vlan)
4395                 dev_put(params.vlan);
4396
4397         return err;
4398 }
4399
4400 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4401 {
4402         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4403         int err;
4404         struct net_device *dev = info->user_ptr[1];
4405         struct station_parameters params;
4406         u8 *mac_addr = NULL;
4407
4408         memset(&params, 0, sizeof(params));
4409
4410         if (!rdev->ops->add_station)
4411                 return -EOPNOTSUPP;
4412
4413         if (!info->attrs[NL80211_ATTR_MAC])
4414                 return -EINVAL;
4415
4416         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4417                 return -EINVAL;
4418
4419         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
4420                 return -EINVAL;
4421
4422         if (!info->attrs[NL80211_ATTR_STA_AID] &&
4423             !info->attrs[NL80211_ATTR_PEER_AID])
4424                 return -EINVAL;
4425
4426         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4427         params.supported_rates =
4428                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4429         params.supported_rates_len =
4430                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4431         params.listen_interval =
4432                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4433
4434         if (info->attrs[NL80211_ATTR_PEER_AID])
4435                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4436         else
4437                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4438         if (!params.aid || params.aid > IEEE80211_MAX_AID)
4439                 return -EINVAL;
4440
4441         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4442                 params.capability =
4443                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4444                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4445         }
4446
4447         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4448                 params.ext_capab =
4449                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4450                 params.ext_capab_len =
4451                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4452         }
4453
4454         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4455                 params.ht_capa =
4456                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4457
4458         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4459                 params.vht_capa =
4460                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4461
4462         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4463                 params.opmode_notif_used = true;
4464                 params.opmode_notif =
4465                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4466         }
4467
4468         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4469                 params.plink_action =
4470                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4471                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4472                         return -EINVAL;
4473         }
4474
4475         err = nl80211_parse_sta_channel_info(info, &params);
4476         if (err)
4477                 return err;
4478
4479         err = nl80211_parse_sta_wme(info, &params);
4480         if (err)
4481                 return err;
4482
4483         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4484                 return -EINVAL;
4485
4486         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
4487          * as userspace might just pass through the capabilities from the IEs
4488          * directly, rather than enforcing this restriction and returning an
4489          * error in this case.
4490          */
4491         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
4492                 params.ht_capa = NULL;
4493                 params.vht_capa = NULL;
4494         }
4495
4496         /* When you run into this, adjust the code below for the new flag */
4497         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4498
4499         switch (dev->ieee80211_ptr->iftype) {
4500         case NL80211_IFTYPE_AP:
4501         case NL80211_IFTYPE_AP_VLAN:
4502         case NL80211_IFTYPE_P2P_GO:
4503                 /* ignore WME attributes if iface/sta is not capable */
4504                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
4505                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
4506                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4507
4508                 /* TDLS peers cannot be added */
4509                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4510                     info->attrs[NL80211_ATTR_PEER_AID])
4511                         return -EINVAL;
4512                 /* but don't bother the driver with it */
4513                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4514
4515                 /* allow authenticated/associated only if driver handles it */
4516                 if (!(rdev->wiphy.features &
4517                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4518                     params.sta_flags_mask &
4519                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4520                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4521                         return -EINVAL;
4522
4523                 /* must be last in here for error handling */
4524                 params.vlan = get_vlan(info, rdev);
4525                 if (IS_ERR(params.vlan))
4526                         return PTR_ERR(params.vlan);
4527                 break;
4528         case NL80211_IFTYPE_MESH_POINT:
4529                 /* ignore uAPSD data */
4530                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4531
4532                 /* associated is disallowed */
4533                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4534                         return -EINVAL;
4535                 /* TDLS peers cannot be added */
4536                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
4537                     info->attrs[NL80211_ATTR_PEER_AID])
4538                         return -EINVAL;
4539                 break;
4540         case NL80211_IFTYPE_STATION:
4541         case NL80211_IFTYPE_P2P_CLIENT:
4542                 /* ignore uAPSD data */
4543                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4544
4545                 /* these are disallowed */
4546                 if (params.sta_flags_mask &
4547                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4548                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4549                         return -EINVAL;
4550                 /* Only TDLS peers can be added */
4551                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4552                         return -EINVAL;
4553                 /* Can only add if TDLS ... */
4554                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4555                         return -EOPNOTSUPP;
4556                 /* ... with external setup is supported */
4557                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4558                         return -EOPNOTSUPP;
4559                 /*
4560                  * Older wpa_supplicant versions always mark the TDLS peer
4561                  * as authorized, but it shouldn't yet be.
4562                  */
4563                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4564                 break;
4565         default:
4566                 return -EOPNOTSUPP;
4567         }
4568
4569         /* be aware of params.vlan when changing code here */
4570
4571         err = rdev_add_station(rdev, dev, mac_addr, &params);
4572
4573         if (params.vlan)
4574                 dev_put(params.vlan);
4575         return err;
4576 }
4577
4578 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4579 {
4580         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4581         struct net_device *dev = info->user_ptr[1];
4582         struct station_del_parameters params;
4583
4584         memset(&params, 0, sizeof(params));
4585
4586         if (info->attrs[NL80211_ATTR_MAC])
4587                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
4588
4589         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4590             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4591             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4592             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4593                 return -EINVAL;
4594
4595         if (!rdev->ops->del_station)
4596                 return -EOPNOTSUPP;
4597
4598         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
4599                 params.subtype =
4600                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
4601                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
4602                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
4603                         return -EINVAL;
4604         } else {
4605                 /* Default to Deauthentication frame */
4606                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
4607         }
4608
4609         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
4610                 params.reason_code =
4611                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4612                 if (params.reason_code == 0)
4613                         return -EINVAL; /* 0 is reserved */
4614         } else {
4615                 /* Default to reason code 2 */
4616                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
4617         }
4618
4619         return rdev_del_station(rdev, dev, &params);
4620 }
4621
4622 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4623                                 int flags, struct net_device *dev,
4624                                 u8 *dst, u8 *next_hop,
4625                                 struct mpath_info *pinfo)
4626 {
4627         void *hdr;
4628         struct nlattr *pinfoattr;
4629
4630         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
4631         if (!hdr)
4632                 return -1;
4633
4634         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4635             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4636             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4637             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4638                 goto nla_put_failure;
4639
4640         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4641         if (!pinfoattr)
4642                 goto nla_put_failure;
4643         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4644             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4645                         pinfo->frame_qlen))
4646                 goto nla_put_failure;
4647         if (((pinfo->filled & MPATH_INFO_SN) &&
4648              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4649             ((pinfo->filled & MPATH_INFO_METRIC) &&
4650              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4651                          pinfo->metric)) ||
4652             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4653              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4654                          pinfo->exptime)) ||
4655             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4656              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4657                         pinfo->flags)) ||
4658             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4659              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4660                          pinfo->discovery_timeout)) ||
4661             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4662              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4663                         pinfo->discovery_retries)))
4664                 goto nla_put_failure;
4665
4666         nla_nest_end(msg, pinfoattr);
4667
4668         genlmsg_end(msg, hdr);
4669         return 0;
4670
4671  nla_put_failure:
4672         genlmsg_cancel(msg, hdr);
4673         return -EMSGSIZE;
4674 }
4675
4676 static int nl80211_dump_mpath(struct sk_buff *skb,
4677                               struct netlink_callback *cb)
4678 {
4679         struct mpath_info pinfo;
4680         struct cfg80211_registered_device *rdev;
4681         struct wireless_dev *wdev;
4682         u8 dst[ETH_ALEN];
4683         u8 next_hop[ETH_ALEN];
4684         int path_idx = cb->args[2];
4685         int err;
4686
4687         rtnl_lock();
4688         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4689         if (err)
4690                 goto out_err;
4691
4692         if (!rdev->ops->dump_mpath) {
4693                 err = -EOPNOTSUPP;
4694                 goto out_err;
4695         }
4696
4697         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4698                 err = -EOPNOTSUPP;
4699                 goto out_err;
4700         }
4701
4702         while (1) {
4703                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
4704                                       next_hop, &pinfo);
4705                 if (err == -ENOENT)
4706                         break;
4707                 if (err)
4708                         goto out_err;
4709
4710                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4711                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4712                                        wdev->netdev, dst, next_hop,
4713                                        &pinfo) < 0)
4714                         goto out;
4715
4716                 path_idx++;
4717         }
4718
4719
4720  out:
4721         cb->args[2] = path_idx;
4722         err = skb->len;
4723  out_err:
4724         rtnl_unlock();
4725         return err;
4726 }
4727
4728 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4729 {
4730         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4731         int err;
4732         struct net_device *dev = info->user_ptr[1];
4733         struct mpath_info pinfo;
4734         struct sk_buff *msg;
4735         u8 *dst = NULL;
4736         u8 next_hop[ETH_ALEN];
4737
4738         memset(&pinfo, 0, sizeof(pinfo));
4739
4740         if (!info->attrs[NL80211_ATTR_MAC])
4741                 return -EINVAL;
4742
4743         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4744
4745         if (!rdev->ops->get_mpath)
4746                 return -EOPNOTSUPP;
4747
4748         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4749                 return -EOPNOTSUPP;
4750
4751         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4752         if (err)
4753                 return err;
4754
4755         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4756         if (!msg)
4757                 return -ENOMEM;
4758
4759         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4760                                  dev, dst, next_hop, &pinfo) < 0) {
4761                 nlmsg_free(msg);
4762                 return -ENOBUFS;
4763         }
4764
4765         return genlmsg_reply(msg, info);
4766 }
4767
4768 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4769 {
4770         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4771         struct net_device *dev = info->user_ptr[1];
4772         u8 *dst = NULL;
4773         u8 *next_hop = NULL;
4774
4775         if (!info->attrs[NL80211_ATTR_MAC])
4776                 return -EINVAL;
4777
4778         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4779                 return -EINVAL;
4780
4781         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4782         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4783
4784         if (!rdev->ops->change_mpath)
4785                 return -EOPNOTSUPP;
4786
4787         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4788                 return -EOPNOTSUPP;
4789
4790         return rdev_change_mpath(rdev, dev, dst, next_hop);
4791 }
4792
4793 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4794 {
4795         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4796         struct net_device *dev = info->user_ptr[1];
4797         u8 *dst = NULL;
4798         u8 *next_hop = NULL;
4799
4800         if (!info->attrs[NL80211_ATTR_MAC])
4801                 return -EINVAL;
4802
4803         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4804                 return -EINVAL;
4805
4806         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4807         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4808
4809         if (!rdev->ops->add_mpath)
4810                 return -EOPNOTSUPP;
4811
4812         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4813                 return -EOPNOTSUPP;
4814
4815         return rdev_add_mpath(rdev, dev, dst, next_hop);
4816 }
4817
4818 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4819 {
4820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4821         struct net_device *dev = info->user_ptr[1];
4822         u8 *dst = NULL;
4823
4824         if (info->attrs[NL80211_ATTR_MAC])
4825                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4826
4827         if (!rdev->ops->del_mpath)
4828                 return -EOPNOTSUPP;
4829
4830         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4831                 return -EOPNOTSUPP;
4832
4833         return rdev_del_mpath(rdev, dev, dst);
4834 }
4835
4836 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
4837 {
4838         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4839         int err;
4840         struct net_device *dev = info->user_ptr[1];
4841         struct mpath_info pinfo;
4842         struct sk_buff *msg;
4843         u8 *dst = NULL;
4844         u8 mpp[ETH_ALEN];
4845
4846         memset(&pinfo, 0, sizeof(pinfo));
4847
4848         if (!info->attrs[NL80211_ATTR_MAC])
4849                 return -EINVAL;
4850
4851         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4852
4853         if (!rdev->ops->get_mpp)
4854                 return -EOPNOTSUPP;
4855
4856         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4857                 return -EOPNOTSUPP;
4858
4859         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
4860         if (err)
4861                 return err;
4862
4863         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4864         if (!msg)
4865                 return -ENOMEM;
4866
4867         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4868                                dev, dst, mpp, &pinfo) < 0) {
4869                 nlmsg_free(msg);
4870                 return -ENOBUFS;
4871         }
4872
4873         return genlmsg_reply(msg, info);
4874 }
4875
4876 static int nl80211_dump_mpp(struct sk_buff *skb,
4877                             struct netlink_callback *cb)
4878 {
4879         struct mpath_info pinfo;
4880         struct cfg80211_registered_device *rdev;
4881         struct wireless_dev *wdev;
4882         u8 dst[ETH_ALEN];
4883         u8 mpp[ETH_ALEN];
4884         int path_idx = cb->args[2];
4885         int err;
4886
4887         rtnl_lock();
4888         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4889         if (err)
4890                 goto out_err;
4891
4892         if (!rdev->ops->dump_mpp) {
4893                 err = -EOPNOTSUPP;
4894                 goto out_err;
4895         }
4896
4897         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
4898                 err = -EOPNOTSUPP;
4899                 goto out_err;
4900         }
4901
4902         while (1) {
4903                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
4904                                     mpp, &pinfo);
4905                 if (err == -ENOENT)
4906                         break;
4907                 if (err)
4908                         goto out_err;
4909
4910                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4911                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4912                                        wdev->netdev, dst, mpp,
4913                                        &pinfo) < 0)
4914                         goto out;
4915
4916                 path_idx++;
4917         }
4918
4919  out:
4920         cb->args[2] = path_idx;
4921         err = skb->len;
4922  out_err:
4923         rtnl_unlock();
4924         return err;
4925 }
4926
4927 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4928 {
4929         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4930         struct net_device *dev = info->user_ptr[1];
4931         struct wireless_dev *wdev = dev->ieee80211_ptr;
4932         struct bss_parameters params;
4933         int err;
4934
4935         memset(&params, 0, sizeof(params));
4936         /* default to not changing parameters */
4937         params.use_cts_prot = -1;
4938         params.use_short_preamble = -1;
4939         params.use_short_slot_time = -1;
4940         params.ap_isolate = -1;
4941         params.ht_opmode = -1;
4942         params.p2p_ctwindow = -1;
4943         params.p2p_opp_ps = -1;
4944
4945         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4946                 params.use_cts_prot =
4947                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4948         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4949                 params.use_short_preamble =
4950                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4951         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4952                 params.use_short_slot_time =
4953                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4954         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4955                 params.basic_rates =
4956                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4957                 params.basic_rates_len =
4958                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4959         }
4960         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4961                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4962         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4963                 params.ht_opmode =
4964                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4965
4966         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4967                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4968                         return -EINVAL;
4969                 params.p2p_ctwindow =
4970                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4971                 if (params.p2p_ctwindow < 0)
4972                         return -EINVAL;
4973                 if (params.p2p_ctwindow != 0 &&
4974                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4975                         return -EINVAL;
4976         }
4977
4978         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4979                 u8 tmp;
4980
4981                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4982                         return -EINVAL;
4983                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4984                 if (tmp > 1)
4985                         return -EINVAL;
4986                 params.p2p_opp_ps = tmp;
4987                 if (params.p2p_opp_ps &&
4988                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4989                         return -EINVAL;
4990         }
4991
4992         if (!rdev->ops->change_bss)
4993                 return -EOPNOTSUPP;
4994
4995         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4996             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4997                 return -EOPNOTSUPP;
4998
4999         wdev_lock(wdev);
5000         err = rdev_change_bss(rdev, dev, &params);
5001         wdev_unlock(wdev);
5002
5003         return err;
5004 }
5005
5006 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5007 {
5008         char *data = NULL;
5009         bool is_indoor;
5010         enum nl80211_user_reg_hint_type user_reg_hint_type;
5011         u32 owner_nlportid;
5012
5013
5014         /*
5015          * You should only get this when cfg80211 hasn't yet initialized
5016          * completely when built-in to the kernel right between the time
5017          * window between nl80211_init() and regulatory_init(), if that is
5018          * even possible.
5019          */
5020         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5021                 return -EINPROGRESS;
5022
5023         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5024                 user_reg_hint_type =
5025                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5026         else
5027                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5028
5029         switch (user_reg_hint_type) {
5030         case NL80211_USER_REG_HINT_USER:
5031         case NL80211_USER_REG_HINT_CELL_BASE:
5032                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5033                         return -EINVAL;
5034
5035                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5036                 return regulatory_hint_user(data, user_reg_hint_type);
5037         case NL80211_USER_REG_HINT_INDOOR:
5038                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5039                         owner_nlportid = info->snd_portid;
5040                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5041                 } else {
5042                         owner_nlportid = 0;
5043                         is_indoor = true;
5044                 }
5045
5046                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5047         default:
5048                 return -EINVAL;
5049         }
5050 }
5051
5052 static int nl80211_get_mesh_config(struct sk_buff *skb,
5053                                    struct genl_info *info)
5054 {
5055         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5056         struct net_device *dev = info->user_ptr[1];
5057         struct wireless_dev *wdev = dev->ieee80211_ptr;
5058         struct mesh_config cur_params;
5059         int err = 0;
5060         void *hdr;
5061         struct nlattr *pinfoattr;
5062         struct sk_buff *msg;
5063
5064         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5065                 return -EOPNOTSUPP;
5066
5067         if (!rdev->ops->get_mesh_config)
5068                 return -EOPNOTSUPP;
5069
5070         wdev_lock(wdev);
5071         /* If not connected, get default parameters */
5072         if (!wdev->mesh_id_len)
5073                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5074         else
5075                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5076         wdev_unlock(wdev);
5077
5078         if (err)
5079                 return err;
5080
5081         /* Draw up a netlink message to send back */
5082         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5083         if (!msg)
5084                 return -ENOMEM;
5085         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5086                              NL80211_CMD_GET_MESH_CONFIG);
5087         if (!hdr)
5088                 goto out;
5089         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5090         if (!pinfoattr)
5091                 goto nla_put_failure;
5092         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5093             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5094                         cur_params.dot11MeshRetryTimeout) ||
5095             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5096                         cur_params.dot11MeshConfirmTimeout) ||
5097             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5098                         cur_params.dot11MeshHoldingTimeout) ||
5099             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5100                         cur_params.dot11MeshMaxPeerLinks) ||
5101             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5102                        cur_params.dot11MeshMaxRetries) ||
5103             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5104                        cur_params.dot11MeshTTL) ||
5105             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5106                        cur_params.element_ttl) ||
5107             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5108                        cur_params.auto_open_plinks) ||
5109             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5110                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5111             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5112                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5113             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5114                         cur_params.path_refresh_time) ||
5115             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5116                         cur_params.min_discovery_timeout) ||
5117             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5118                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5119             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5120                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5121             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5122                         cur_params.dot11MeshHWMPperrMinInterval) ||
5123             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5124                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5125             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5126                        cur_params.dot11MeshHWMPRootMode) ||
5127             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5128                         cur_params.dot11MeshHWMPRannInterval) ||
5129             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5130                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5131             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5132                        cur_params.dot11MeshForwarding) ||
5133             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5134                         cur_params.rssi_threshold) ||
5135             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5136                         cur_params.ht_opmode) ||
5137             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5138                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5139             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5140                         cur_params.dot11MeshHWMProotInterval) ||
5141             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5142                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5143             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5144                         cur_params.power_mode) ||
5145             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5146                         cur_params.dot11MeshAwakeWindowDuration) ||
5147             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5148                         cur_params.plink_timeout))
5149                 goto nla_put_failure;
5150         nla_nest_end(msg, pinfoattr);
5151         genlmsg_end(msg, hdr);
5152         return genlmsg_reply(msg, info);
5153
5154  nla_put_failure:
5155         genlmsg_cancel(msg, hdr);
5156  out:
5157         nlmsg_free(msg);
5158         return -ENOBUFS;
5159 }
5160
5161 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5162         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5163         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5164         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5165         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5166         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5167         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5168         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5169         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5170         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5171         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5172         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5173         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5174         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5175         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5176         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5177         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5178         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5179         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5180         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5181         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5182         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5183         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5184         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5185         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5186         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5187         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5188         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5189         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5190 };
5191
5192 static const struct nla_policy
5193         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5194         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5195         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5196         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5197         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5198         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5199         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5200         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5201                                     .len = IEEE80211_MAX_DATA_LEN },
5202         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5203 };
5204
5205 static int nl80211_parse_mesh_config(struct genl_info *info,
5206                                      struct mesh_config *cfg,
5207                                      u32 *mask_out)
5208 {
5209         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5210         u32 mask = 0;
5211
5212 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5213 do {                                                                        \
5214         if (tb[attr]) {                                                     \
5215                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
5216                         return -EINVAL;                                     \
5217                 cfg->param = fn(tb[attr]);                                  \
5218                 mask |= (1 << (attr - 1));                                  \
5219         }                                                                   \
5220 } while (0)
5221
5222
5223         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5224                 return -EINVAL;
5225         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5226                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5227                              nl80211_meshconf_params_policy))
5228                 return -EINVAL;
5229
5230         /* This makes sure that there aren't more than 32 mesh config
5231          * parameters (otherwise our bitfield scheme would not work.) */
5232         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5233
5234         /* Fill in the params struct */
5235         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5236                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5237                                   nla_get_u16);
5238         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5239                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5240                                   nla_get_u16);
5241         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5242                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5243                                   nla_get_u16);
5244         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5245                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5246                                   nla_get_u16);
5247         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5248                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5249                                   nla_get_u8);
5250         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5251                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
5252         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5253                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5254                                   nla_get_u8);
5255         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5256                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5257                                   nla_get_u8);
5258         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5259                                   1, 255, mask,
5260                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5261                                   nla_get_u32);
5262         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5263                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5264                                   nla_get_u8);
5265         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5266                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5267                                   nla_get_u32);
5268         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5269                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5270                                   nla_get_u16);
5271         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5272                                   1, 65535, mask,
5273                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5274                                   nla_get_u32);
5275         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5276                                   1, 65535, mask,
5277                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5278                                   nla_get_u16);
5279         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5280                                   1, 65535, mask,
5281                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5282                                   nla_get_u16);
5283         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5284                                   dot11MeshHWMPnetDiameterTraversalTime,
5285                                   1, 65535, mask,
5286                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5287                                   nla_get_u16);
5288         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5289                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5290                                   nla_get_u8);
5291         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5292                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5293                                   nla_get_u16);
5294         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5295                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5296                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5297                                   nla_get_u8);
5298         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5299                                   mask, NL80211_MESHCONF_FORWARDING,
5300                                   nla_get_u8);
5301         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5302                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5303                                   nla_get_s32);
5304         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
5305                                   mask, NL80211_MESHCONF_HT_OPMODE,
5306                                   nla_get_u16);
5307         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
5308                                   1, 65535, mask,
5309                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5310                                   nla_get_u32);
5311         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
5312                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5313                                   nla_get_u16);
5314         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5315                                   dot11MeshHWMPconfirmationInterval,
5316                                   1, 65535, mask,
5317                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5318                                   nla_get_u16);
5319         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
5320                                   NL80211_MESH_POWER_ACTIVE,
5321                                   NL80211_MESH_POWER_MAX,
5322                                   mask, NL80211_MESHCONF_POWER_MODE,
5323                                   nla_get_u32);
5324         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
5325                                   0, 65535, mask,
5326                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
5327         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
5328                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
5329                                   nla_get_u32);
5330         if (mask_out)
5331                 *mask_out = mask;
5332
5333         return 0;
5334
5335 #undef FILL_IN_MESH_PARAM_IF_SET
5336 }
5337
5338 static int nl80211_parse_mesh_setup(struct genl_info *info,
5339                                      struct mesh_setup *setup)
5340 {
5341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5342         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
5343
5344         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
5345                 return -EINVAL;
5346         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
5347                              info->attrs[NL80211_ATTR_MESH_SETUP],
5348                              nl80211_mesh_setup_params_policy))
5349                 return -EINVAL;
5350
5351         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
5352                 setup->sync_method =
5353                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
5354                  IEEE80211_SYNC_METHOD_VENDOR :
5355                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
5356
5357         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
5358                 setup->path_sel_proto =
5359                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
5360                  IEEE80211_PATH_PROTOCOL_VENDOR :
5361                  IEEE80211_PATH_PROTOCOL_HWMP;
5362
5363         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
5364                 setup->path_metric =
5365                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
5366                  IEEE80211_PATH_METRIC_VENDOR :
5367                  IEEE80211_PATH_METRIC_AIRTIME;
5368
5369
5370         if (tb[NL80211_MESH_SETUP_IE]) {
5371                 struct nlattr *ieattr =
5372                         tb[NL80211_MESH_SETUP_IE];
5373                 if (!is_valid_ie_attr(ieattr))
5374                         return -EINVAL;
5375                 setup->ie = nla_data(ieattr);
5376                 setup->ie_len = nla_len(ieattr);
5377         }
5378         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
5379             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
5380                 return -EINVAL;
5381         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
5382         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
5383         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
5384         if (setup->is_secure)
5385                 setup->user_mpm = true;
5386
5387         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
5388                 if (!setup->user_mpm)
5389                         return -EINVAL;
5390                 setup->auth_id =
5391                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
5392         }
5393
5394         return 0;
5395 }
5396
5397 static int nl80211_update_mesh_config(struct sk_buff *skb,
5398                                       struct genl_info *info)
5399 {
5400         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5401         struct net_device *dev = info->user_ptr[1];
5402         struct wireless_dev *wdev = dev->ieee80211_ptr;
5403         struct mesh_config cfg;
5404         u32 mask;
5405         int err;
5406
5407         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5408                 return -EOPNOTSUPP;
5409
5410         if (!rdev->ops->update_mesh_config)
5411                 return -EOPNOTSUPP;
5412
5413         err = nl80211_parse_mesh_config(info, &cfg, &mask);
5414         if (err)
5415                 return err;
5416
5417         wdev_lock(wdev);
5418         if (!wdev->mesh_id_len)
5419                 err = -ENOLINK;
5420
5421         if (!err)
5422                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
5423
5424         wdev_unlock(wdev);
5425
5426         return err;
5427 }
5428
5429 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
5430                               struct sk_buff *msg)
5431 {
5432         struct nlattr *nl_reg_rules;
5433         unsigned int i;
5434
5435         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
5436             (regdom->dfs_region &&
5437              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
5438                 goto nla_put_failure;
5439
5440         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
5441         if (!nl_reg_rules)
5442                 goto nla_put_failure;
5443
5444         for (i = 0; i < regdom->n_reg_rules; i++) {
5445                 struct nlattr *nl_reg_rule;
5446                 const struct ieee80211_reg_rule *reg_rule;
5447                 const struct ieee80211_freq_range *freq_range;
5448                 const struct ieee80211_power_rule *power_rule;
5449                 unsigned int max_bandwidth_khz;
5450
5451                 reg_rule = &regdom->reg_rules[i];
5452                 freq_range = &reg_rule->freq_range;
5453                 power_rule = &reg_rule->power_rule;
5454
5455                 nl_reg_rule = nla_nest_start(msg, i);
5456                 if (!nl_reg_rule)
5457                         goto nla_put_failure;
5458
5459                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
5460                 if (!max_bandwidth_khz)
5461                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
5462                                                                   reg_rule);
5463
5464                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
5465                                 reg_rule->flags) ||
5466                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
5467                                 freq_range->start_freq_khz) ||
5468                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
5469                                 freq_range->end_freq_khz) ||
5470                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
5471                                 max_bandwidth_khz) ||
5472                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
5473                                 power_rule->max_antenna_gain) ||
5474                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
5475                                 power_rule->max_eirp) ||
5476                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
5477                                 reg_rule->dfs_cac_ms))
5478                         goto nla_put_failure;
5479
5480                 nla_nest_end(msg, nl_reg_rule);
5481         }
5482
5483         nla_nest_end(msg, nl_reg_rules);
5484         return 0;
5485
5486 nla_put_failure:
5487         return -EMSGSIZE;
5488 }
5489
5490 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
5491 {
5492         const struct ieee80211_regdomain *regdom = NULL;
5493         struct cfg80211_registered_device *rdev;
5494         struct wiphy *wiphy = NULL;
5495         struct sk_buff *msg;
5496         void *hdr;
5497
5498         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5499         if (!msg)
5500                 return -ENOBUFS;
5501
5502         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5503                              NL80211_CMD_GET_REG);
5504         if (!hdr)
5505                 goto put_failure;
5506
5507         if (info->attrs[NL80211_ATTR_WIPHY]) {
5508                 bool self_managed;
5509
5510                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
5511                 if (IS_ERR(rdev)) {
5512                         nlmsg_free(msg);
5513                         return PTR_ERR(rdev);
5514                 }
5515
5516                 wiphy = &rdev->wiphy;
5517                 self_managed = wiphy->regulatory_flags &
5518                                REGULATORY_WIPHY_SELF_MANAGED;
5519                 regdom = get_wiphy_regdom(wiphy);
5520
5521                 /* a self-managed-reg device must have a private regdom */
5522                 if (WARN_ON(!regdom && self_managed)) {
5523                         nlmsg_free(msg);
5524                         return -EINVAL;
5525                 }
5526
5527                 if (regdom &&
5528                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5529                         goto nla_put_failure;
5530         }
5531
5532         if (!wiphy && reg_last_request_cell_base() &&
5533             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5534                         NL80211_USER_REG_HINT_CELL_BASE))
5535                 goto nla_put_failure;
5536
5537         rcu_read_lock();
5538
5539         if (!regdom)
5540                 regdom = rcu_dereference(cfg80211_regdomain);
5541
5542         if (nl80211_put_regdom(regdom, msg))
5543                 goto nla_put_failure_rcu;
5544
5545         rcu_read_unlock();
5546
5547         genlmsg_end(msg, hdr);
5548         return genlmsg_reply(msg, info);
5549
5550 nla_put_failure_rcu:
5551         rcu_read_unlock();
5552 nla_put_failure:
5553         genlmsg_cancel(msg, hdr);
5554 put_failure:
5555         nlmsg_free(msg);
5556         return -EMSGSIZE;
5557 }
5558
5559 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
5560                                u32 seq, int flags, struct wiphy *wiphy,
5561                                const struct ieee80211_regdomain *regdom)
5562 {
5563         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5564                                    NL80211_CMD_GET_REG);
5565
5566         if (!hdr)
5567                 return -1;
5568
5569         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5570
5571         if (nl80211_put_regdom(regdom, msg))
5572                 goto nla_put_failure;
5573
5574         if (!wiphy && reg_last_request_cell_base() &&
5575             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
5576                         NL80211_USER_REG_HINT_CELL_BASE))
5577                 goto nla_put_failure;
5578
5579         if (wiphy &&
5580             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
5581                 goto nla_put_failure;
5582
5583         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
5584             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
5585                 goto nla_put_failure;
5586
5587         genlmsg_end(msg, hdr);
5588         return 0;
5589
5590 nla_put_failure:
5591         genlmsg_cancel(msg, hdr);
5592         return -EMSGSIZE;
5593 }
5594
5595 static int nl80211_get_reg_dump(struct sk_buff *skb,
5596                                 struct netlink_callback *cb)
5597 {
5598         const struct ieee80211_regdomain *regdom = NULL;
5599         struct cfg80211_registered_device *rdev;
5600         int err, reg_idx, start = cb->args[2];
5601
5602         rtnl_lock();
5603
5604         if (cfg80211_regdomain && start == 0) {
5605                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5606                                           NLM_F_MULTI, NULL,
5607                                           rtnl_dereference(cfg80211_regdomain));
5608                 if (err < 0)
5609                         goto out_err;
5610         }
5611
5612         /* the global regdom is idx 0 */
5613         reg_idx = 1;
5614         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
5615                 regdom = get_wiphy_regdom(&rdev->wiphy);
5616                 if (!regdom)
5617                         continue;
5618
5619                 if (++reg_idx <= start)
5620                         continue;
5621
5622                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
5623                                           NLM_F_MULTI, &rdev->wiphy, regdom);
5624                 if (err < 0) {
5625                         reg_idx--;
5626                         break;
5627                 }
5628         }
5629
5630         cb->args[2] = reg_idx;
5631         err = skb->len;
5632 out_err:
5633         rtnl_unlock();
5634         return err;
5635 }
5636
5637 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
5638 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
5639         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
5640         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
5641         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
5642         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
5643         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
5644         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
5645         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
5646 };
5647
5648 static int parse_reg_rule(struct nlattr *tb[],
5649         struct ieee80211_reg_rule *reg_rule)
5650 {
5651         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
5652         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
5653
5654         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
5655                 return -EINVAL;
5656         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
5657                 return -EINVAL;
5658         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
5659                 return -EINVAL;
5660         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
5661                 return -EINVAL;
5662         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
5663                 return -EINVAL;
5664
5665         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
5666
5667         freq_range->start_freq_khz =
5668                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
5669         freq_range->end_freq_khz =
5670                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
5671         freq_range->max_bandwidth_khz =
5672                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
5673
5674         power_rule->max_eirp =
5675                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
5676
5677         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
5678                 power_rule->max_antenna_gain =
5679                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
5680
5681         if (tb[NL80211_ATTR_DFS_CAC_TIME])
5682                 reg_rule->dfs_cac_ms =
5683                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
5684
5685         return 0;
5686 }
5687
5688 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
5689 {
5690         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
5691         struct nlattr *nl_reg_rule;
5692         char *alpha2;
5693         int rem_reg_rules, r;
5694         u32 num_rules = 0, rule_idx = 0, size_of_regd;
5695         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
5696         struct ieee80211_regdomain *rd;
5697
5698         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5699                 return -EINVAL;
5700
5701         if (!info->attrs[NL80211_ATTR_REG_RULES])
5702                 return -EINVAL;
5703
5704         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5705
5706         if (info->attrs[NL80211_ATTR_DFS_REGION])
5707                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
5708
5709         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5710                             rem_reg_rules) {
5711                 num_rules++;
5712                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
5713                         return -EINVAL;
5714         }
5715
5716         if (!reg_is_valid_request(alpha2))
5717                 return -EINVAL;
5718
5719         size_of_regd = sizeof(struct ieee80211_regdomain) +
5720                        num_rules * sizeof(struct ieee80211_reg_rule);
5721
5722         rd = kzalloc(size_of_regd, GFP_KERNEL);
5723         if (!rd)
5724                 return -ENOMEM;
5725
5726         rd->n_reg_rules = num_rules;
5727         rd->alpha2[0] = alpha2[0];
5728         rd->alpha2[1] = alpha2[1];
5729
5730         /*
5731          * Disable DFS master mode if the DFS region was
5732          * not supported or known on this kernel.
5733          */
5734         if (reg_supported_dfs_region(dfs_region))
5735                 rd->dfs_region = dfs_region;
5736
5737         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
5738                             rem_reg_rules) {
5739                 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
5740                               nla_data(nl_reg_rule), nla_len(nl_reg_rule),
5741                               reg_rule_policy);
5742                 if (r)
5743                         goto bad_reg;
5744                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
5745                 if (r)
5746                         goto bad_reg;
5747
5748                 rule_idx++;
5749
5750                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
5751                         r = -EINVAL;
5752                         goto bad_reg;
5753                 }
5754         }
5755
5756         r = set_regdom(rd, REGD_SOURCE_CRDA);
5757         /* set_regdom took ownership */
5758         rd = NULL;
5759
5760  bad_reg:
5761         kfree(rd);
5762         return r;
5763 }
5764 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
5765
5766 static int validate_scan_freqs(struct nlattr *freqs)
5767 {
5768         struct nlattr *attr1, *attr2;
5769         int n_channels = 0, tmp1, tmp2;
5770
5771         nla_for_each_nested(attr1, freqs, tmp1)
5772                 if (nla_len(attr1) != sizeof(u32))
5773                         return 0;
5774
5775         nla_for_each_nested(attr1, freqs, tmp1) {
5776                 n_channels++;
5777                 /*
5778                  * Some hardware has a limited channel list for
5779                  * scanning, and it is pretty much nonsensical
5780                  * to scan for a channel twice, so disallow that
5781                  * and don't require drivers to check that the
5782                  * channel list they get isn't longer than what
5783                  * they can scan, as long as they can scan all
5784                  * the channels they registered at once.
5785                  */
5786                 nla_for_each_nested(attr2, freqs, tmp2)
5787                         if (attr1 != attr2 &&
5788                             nla_get_u32(attr1) == nla_get_u32(attr2))
5789                                 return 0;
5790         }
5791
5792         return n_channels;
5793 }
5794
5795 static int nl80211_parse_random_mac(struct nlattr **attrs,
5796                                     u8 *mac_addr, u8 *mac_addr_mask)
5797 {
5798         int i;
5799
5800         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
5801                 eth_zero_addr(mac_addr);
5802                 eth_zero_addr(mac_addr_mask);
5803                 mac_addr[0] = 0x2;
5804                 mac_addr_mask[0] = 0x3;
5805
5806                 return 0;
5807         }
5808
5809         /* need both or none */
5810         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
5811                 return -EINVAL;
5812
5813         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
5814         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
5815
5816         /* don't allow or configure an mcast address */
5817         if (!is_multicast_ether_addr(mac_addr_mask) ||
5818             is_multicast_ether_addr(mac_addr))
5819                 return -EINVAL;
5820
5821         /*
5822          * allow users to pass a MAC address that has bits set outside
5823          * of the mask, but don't bother drivers with having to deal
5824          * with such bits
5825          */
5826         for (i = 0; i < ETH_ALEN; i++)
5827                 mac_addr[i] &= mac_addr_mask[i];
5828
5829         return 0;
5830 }
5831
5832 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
5833 {
5834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5835         struct wireless_dev *wdev = info->user_ptr[1];
5836         struct cfg80211_scan_request *request;
5837         struct nlattr *attr;
5838         struct wiphy *wiphy;
5839         int err, tmp, n_ssids = 0, n_channels, i;
5840         size_t ie_len;
5841
5842         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5843                 return -EINVAL;
5844
5845         wiphy = &rdev->wiphy;
5846
5847         if (!rdev->ops->scan)
5848                 return -EOPNOTSUPP;
5849
5850         if (rdev->scan_req || rdev->scan_msg) {
5851                 err = -EBUSY;
5852                 goto unlock;
5853         }
5854
5855         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5856                 n_channels = validate_scan_freqs(
5857                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5858                 if (!n_channels) {
5859                         err = -EINVAL;
5860                         goto unlock;
5861                 }
5862         } else {
5863                 n_channels = ieee80211_get_num_supported_channels(wiphy);
5864         }
5865
5866         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5867                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5868                         n_ssids++;
5869
5870         if (n_ssids > wiphy->max_scan_ssids) {
5871                 err = -EINVAL;
5872                 goto unlock;
5873         }
5874
5875         if (info->attrs[NL80211_ATTR_IE])
5876                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5877         else
5878                 ie_len = 0;
5879
5880         if (ie_len > wiphy->max_scan_ie_len) {
5881                 err = -EINVAL;
5882                 goto unlock;
5883         }
5884
5885         request = kzalloc(sizeof(*request)
5886                         + sizeof(*request->ssids) * n_ssids
5887                         + sizeof(*request->channels) * n_channels
5888                         + ie_len, GFP_KERNEL);
5889         if (!request) {
5890                 err = -ENOMEM;
5891                 goto unlock;
5892         }
5893
5894         if (n_ssids)
5895                 request->ssids = (void *)&request->channels[n_channels];
5896         request->n_ssids = n_ssids;
5897         if (ie_len) {
5898                 if (n_ssids)
5899                         request->ie = (void *)(request->ssids + n_ssids);
5900                 else
5901                         request->ie = (void *)(request->channels + n_channels);
5902         }
5903
5904         i = 0;
5905         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5906                 /* user specified, bail out if channel not found */
5907                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5908                         struct ieee80211_channel *chan;
5909
5910                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5911
5912                         if (!chan) {
5913                                 err = -EINVAL;
5914                                 goto out_free;
5915                         }
5916
5917                         /* ignore disabled channels */
5918                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5919                                 continue;
5920
5921                         request->channels[i] = chan;
5922                         i++;
5923                 }
5924         } else {
5925                 enum ieee80211_band band;
5926
5927                 /* all channels */
5928                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5929                         int j;
5930                         if (!wiphy->bands[band])
5931                                 continue;
5932                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5933                                 struct ieee80211_channel *chan;
5934
5935                                 chan = &wiphy->bands[band]->channels[j];
5936
5937                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5938                                         continue;
5939
5940                                 request->channels[i] = chan;
5941                                 i++;
5942                         }
5943                 }
5944         }
5945
5946         if (!i) {
5947                 err = -EINVAL;
5948                 goto out_free;
5949         }
5950
5951         request->n_channels = i;
5952
5953         i = 0;
5954         if (n_ssids) {
5955                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5956                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5957                                 err = -EINVAL;
5958                                 goto out_free;
5959                         }
5960                         request->ssids[i].ssid_len = nla_len(attr);
5961                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5962                         i++;
5963                 }
5964         }
5965
5966         if (info->attrs[NL80211_ATTR_IE]) {
5967                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5968                 memcpy((void *)request->ie,
5969                        nla_data(info->attrs[NL80211_ATTR_IE]),
5970                        request->ie_len);
5971         }
5972
5973         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5974                 if (wiphy->bands[i])
5975                         request->rates[i] =
5976                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5977
5978         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5979                 nla_for_each_nested(attr,
5980                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5981                                     tmp) {
5982                         enum ieee80211_band band = nla_type(attr);
5983
5984                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5985                                 err = -EINVAL;
5986                                 goto out_free;
5987                         }
5988
5989                         if (!wiphy->bands[band])
5990                                 continue;
5991
5992                         err = ieee80211_get_ratemask(wiphy->bands[band],
5993                                                      nla_data(attr),
5994                                                      nla_len(attr),
5995                                                      &request->rates[band]);
5996                         if (err)
5997                                 goto out_free;
5998                 }
5999         }
6000
6001         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6002                 request->flags = nla_get_u32(
6003                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6004                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6005                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6006                         err = -EOPNOTSUPP;
6007                         goto out_free;
6008                 }
6009
6010                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6011                         if (!(wiphy->features &
6012                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6013                                 err = -EOPNOTSUPP;
6014                                 goto out_free;
6015                         }
6016
6017                         if (wdev->current_bss) {
6018                                 err = -EOPNOTSUPP;
6019                                 goto out_free;
6020                         }
6021
6022                         err = nl80211_parse_random_mac(info->attrs,
6023                                                        request->mac_addr,
6024                                                        request->mac_addr_mask);
6025                         if (err)
6026                                 goto out_free;
6027                 }
6028         }
6029
6030         request->no_cck =
6031                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6032
6033         request->wdev = wdev;
6034         request->wiphy = &rdev->wiphy;
6035         request->scan_start = jiffies;
6036
6037         rdev->scan_req = request;
6038         err = rdev_scan(rdev, request);
6039
6040         if (!err) {
6041                 nl80211_send_scan_start(rdev, wdev);
6042                 if (wdev->netdev)
6043                         dev_hold(wdev->netdev);
6044         } else {
6045  out_free:
6046                 rdev->scan_req = NULL;
6047                 kfree(request);
6048         }
6049
6050  unlock:
6051         return err;
6052 }
6053
6054 static int
6055 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6056                                struct cfg80211_sched_scan_request *request,
6057                                struct nlattr **attrs)
6058 {
6059         int tmp, err, i = 0;
6060         struct nlattr *attr;
6061
6062         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6063                 u32 interval;
6064
6065                 /*
6066                  * If scan plans are not specified,
6067                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL must be specified. In this
6068                  * case one scan plan will be set with the specified scan
6069                  * interval and infinite number of iterations.
6070                  */
6071                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6072                         return -EINVAL;
6073
6074                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6075                 if (!interval)
6076                         return -EINVAL;
6077
6078                 request->scan_plans[0].interval =
6079                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6080                 if (!request->scan_plans[0].interval)
6081                         return -EINVAL;
6082
6083                 if (request->scan_plans[0].interval >
6084                     wiphy->max_sched_scan_plan_interval)
6085                         request->scan_plans[0].interval =
6086                                 wiphy->max_sched_scan_plan_interval;
6087
6088                 return 0;
6089         }
6090
6091         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6092                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6093
6094                 if (WARN_ON(i >= n_plans))
6095                         return -EINVAL;
6096
6097                 err = nla_parse(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6098                                 nla_data(attr), nla_len(attr),
6099                                 nl80211_plan_policy);
6100                 if (err)
6101                         return err;
6102
6103                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6104                         return -EINVAL;
6105
6106                 request->scan_plans[i].interval =
6107                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6108                 if (!request->scan_plans[i].interval ||
6109                     request->scan_plans[i].interval >
6110                     wiphy->max_sched_scan_plan_interval)
6111                         return -EINVAL;
6112
6113                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6114                         request->scan_plans[i].iterations =
6115                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6116                         if (!request->scan_plans[i].iterations ||
6117                             (request->scan_plans[i].iterations >
6118                              wiphy->max_sched_scan_plan_iterations))
6119                                 return -EINVAL;
6120                 } else if (i < n_plans - 1) {
6121                         /*
6122                          * All scan plans but the last one must specify
6123                          * a finite number of iterations
6124                          */
6125                         return -EINVAL;
6126                 }
6127
6128                 i++;
6129         }
6130
6131         /*
6132          * The last scan plan must not specify the number of
6133          * iterations, it is supposed to run infinitely
6134          */
6135         if (request->scan_plans[n_plans - 1].iterations)
6136                 return  -EINVAL;
6137
6138         return 0;
6139 }
6140
6141 static struct cfg80211_sched_scan_request *
6142 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6143                          struct nlattr **attrs)
6144 {
6145         struct cfg80211_sched_scan_request *request;
6146         struct nlattr *attr;
6147         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6148         enum ieee80211_band band;
6149         size_t ie_len;
6150         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6151         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6152
6153         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
6154                 return ERR_PTR(-EINVAL);
6155
6156         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6157                 n_channels = validate_scan_freqs(
6158                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6159                 if (!n_channels)
6160                         return ERR_PTR(-EINVAL);
6161         } else {
6162                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6163         }
6164
6165         if (attrs[NL80211_ATTR_SCAN_SSIDS])
6166                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6167                                     tmp)
6168                         n_ssids++;
6169
6170         if (n_ssids > wiphy->max_sched_scan_ssids)
6171                 return ERR_PTR(-EINVAL);
6172
6173         /*
6174          * First, count the number of 'real' matchsets. Due to an issue with
6175          * the old implementation, matchsets containing only the RSSI attribute
6176          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
6177          * RSSI for all matchsets, rather than their own matchset for reporting
6178          * all APs with a strong RSSI. This is needed to be compatible with
6179          * older userspace that treated a matchset with only the RSSI as the
6180          * global RSSI for all other matchsets - if there are other matchsets.
6181          */
6182         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6183                 nla_for_each_nested(attr,
6184                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6185                                     tmp) {
6186                         struct nlattr *rssi;
6187
6188                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6189                                         nla_data(attr), nla_len(attr),
6190                                         nl80211_match_policy);
6191                         if (err)
6192                                 return ERR_PTR(err);
6193                         /* add other standalone attributes here */
6194                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID]) {
6195                                 n_match_sets++;
6196                                 continue;
6197                         }
6198                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6199                         if (rssi)
6200                                 default_match_rssi = nla_get_s32(rssi);
6201                 }
6202         }
6203
6204         /* However, if there's no other matchset, add the RSSI one */
6205         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
6206                 n_match_sets = 1;
6207
6208         if (n_match_sets > wiphy->max_match_sets)
6209                 return ERR_PTR(-EINVAL);
6210
6211         if (attrs[NL80211_ATTR_IE])
6212                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
6213         else
6214                 ie_len = 0;
6215
6216         if (ie_len > wiphy->max_sched_scan_ie_len)
6217                 return ERR_PTR(-EINVAL);
6218
6219         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6220                 /*
6221                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
6222                  * each scan plan already specifies its own interval
6223                  */
6224                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6225                         return ERR_PTR(-EINVAL);
6226
6227                 nla_for_each_nested(attr,
6228                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
6229                         n_plans++;
6230         } else {
6231                 /*
6232                  * The scan interval attribute is kept for backward
6233                  * compatibility. If no scan plans are specified and sched scan
6234                  * interval is specified, one scan plan will be set with this
6235                  * scan interval and infinite number of iterations.
6236                  */
6237                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
6238                         return ERR_PTR(-EINVAL);
6239
6240                 n_plans = 1;
6241         }
6242
6243         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
6244                 return ERR_PTR(-EINVAL);
6245
6246         request = kzalloc(sizeof(*request)
6247                         + sizeof(*request->ssids) * n_ssids
6248                         + sizeof(*request->match_sets) * n_match_sets
6249                         + sizeof(*request->scan_plans) * n_plans
6250                         + sizeof(*request->channels) * n_channels
6251                         + ie_len, GFP_KERNEL);
6252         if (!request)
6253                 return ERR_PTR(-ENOMEM);
6254
6255         if (n_ssids)
6256                 request->ssids = (void *)&request->channels[n_channels];
6257         request->n_ssids = n_ssids;
6258         if (ie_len) {
6259                 if (n_ssids)
6260                         request->ie = (void *)(request->ssids + n_ssids);
6261                 else
6262                         request->ie = (void *)(request->channels + n_channels);
6263         }
6264
6265         if (n_match_sets) {
6266                 if (request->ie)
6267                         request->match_sets = (void *)(request->ie + ie_len);
6268                 else if (n_ssids)
6269                         request->match_sets =
6270                                 (void *)(request->ssids + n_ssids);
6271                 else
6272                         request->match_sets =
6273                                 (void *)(request->channels + n_channels);
6274         }
6275         request->n_match_sets = n_match_sets;
6276
6277         if (n_match_sets)
6278                 request->scan_plans = (void *)(request->match_sets +
6279                                                n_match_sets);
6280         else if (request->ie)
6281                 request->scan_plans = (void *)(request->ie + ie_len);
6282         else if (n_ssids)
6283                 request->scan_plans = (void *)(request->ssids + n_ssids);
6284         else
6285                 request->scan_plans = (void *)(request->channels + n_channels);
6286
6287         request->n_scan_plans = n_plans;
6288
6289         i = 0;
6290         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6291                 /* user specified, bail out if channel not found */
6292                 nla_for_each_nested(attr,
6293                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
6294                                     tmp) {
6295                         struct ieee80211_channel *chan;
6296
6297                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6298
6299                         if (!chan) {
6300                                 err = -EINVAL;
6301                                 goto out_free;
6302                         }
6303
6304                         /* ignore disabled channels */
6305                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6306                                 continue;
6307
6308                         request->channels[i] = chan;
6309                         i++;
6310                 }
6311         } else {
6312                 /* all channels */
6313                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6314                         int j;
6315                         if (!wiphy->bands[band])
6316                                 continue;
6317                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6318                                 struct ieee80211_channel *chan;
6319
6320                                 chan = &wiphy->bands[band]->channels[j];
6321
6322                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6323                                         continue;
6324
6325                                 request->channels[i] = chan;
6326                                 i++;
6327                         }
6328                 }
6329         }
6330
6331         if (!i) {
6332                 err = -EINVAL;
6333                 goto out_free;
6334         }
6335
6336         request->n_channels = i;
6337
6338         i = 0;
6339         if (n_ssids) {
6340                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
6341                                     tmp) {
6342                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6343                                 err = -EINVAL;
6344                                 goto out_free;
6345                         }
6346                         request->ssids[i].ssid_len = nla_len(attr);
6347                         memcpy(request->ssids[i].ssid, nla_data(attr),
6348                                nla_len(attr));
6349                         i++;
6350                 }
6351         }
6352
6353         i = 0;
6354         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
6355                 nla_for_each_nested(attr,
6356                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
6357                                     tmp) {
6358                         struct nlattr *ssid, *rssi;
6359
6360                         err = nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
6361                                         nla_data(attr), nla_len(attr),
6362                                         nl80211_match_policy);
6363                         if (err)
6364                                 goto out_free;
6365                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
6366                         if (ssid) {
6367                                 if (WARN_ON(i >= n_match_sets)) {
6368                                         /* this indicates a programming error,
6369                                          * the loop above should have verified
6370                                          * things properly
6371                                          */
6372                                         err = -EINVAL;
6373                                         goto out_free;
6374                                 }
6375
6376                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
6377                                         err = -EINVAL;
6378                                         goto out_free;
6379                                 }
6380                                 memcpy(request->match_sets[i].ssid.ssid,
6381                                        nla_data(ssid), nla_len(ssid));
6382                                 request->match_sets[i].ssid.ssid_len =
6383                                         nla_len(ssid);
6384                                 /* special attribute - old implemenation w/a */
6385                                 request->match_sets[i].rssi_thold =
6386                                         default_match_rssi;
6387                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
6388                                 if (rssi)
6389                                         request->match_sets[i].rssi_thold =
6390                                                 nla_get_s32(rssi);
6391                         }
6392                         i++;
6393                 }
6394
6395                 /* there was no other matchset, so the RSSI one is alone */
6396                 if (i == 0 && n_match_sets)
6397                         request->match_sets[0].rssi_thold = default_match_rssi;
6398
6399                 request->min_rssi_thold = INT_MAX;
6400                 for (i = 0; i < n_match_sets; i++)
6401                         request->min_rssi_thold =
6402                                 min(request->match_sets[i].rssi_thold,
6403                                     request->min_rssi_thold);
6404         } else {
6405                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
6406         }
6407
6408         if (ie_len) {
6409                 request->ie_len = ie_len;
6410                 memcpy((void *)request->ie,
6411                        nla_data(attrs[NL80211_ATTR_IE]),
6412                        request->ie_len);
6413         }
6414
6415         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
6416                 request->flags = nla_get_u32(
6417                         attrs[NL80211_ATTR_SCAN_FLAGS]);
6418                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6419                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6420                         err = -EOPNOTSUPP;
6421                         goto out_free;
6422                 }
6423
6424                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6425                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
6426
6427                         if (!wdev) /* must be net-detect */
6428                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
6429
6430                         if (!(wiphy->features & flg)) {
6431                                 err = -EOPNOTSUPP;
6432                                 goto out_free;
6433                         }
6434
6435                         if (wdev && wdev->current_bss) {
6436                                 err = -EOPNOTSUPP;
6437                                 goto out_free;
6438                         }
6439
6440                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
6441                                                        request->mac_addr_mask);
6442                         if (err)
6443                                 goto out_free;
6444                 }
6445         }
6446
6447         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
6448                 request->delay =
6449                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
6450
6451         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
6452         if (err)
6453                 goto out_free;
6454
6455         request->scan_start = jiffies;
6456
6457         return request;
6458
6459 out_free:
6460         kfree(request);
6461         return ERR_PTR(err);
6462 }
6463
6464 static int nl80211_start_sched_scan(struct sk_buff *skb,
6465                                     struct genl_info *info)
6466 {
6467         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6468         struct net_device *dev = info->user_ptr[1];
6469         struct wireless_dev *wdev = dev->ieee80211_ptr;
6470         struct cfg80211_sched_scan_request *sched_scan_req;
6471         int err;
6472
6473         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6474             !rdev->ops->sched_scan_start)
6475                 return -EOPNOTSUPP;
6476
6477         if (rdev->sched_scan_req)
6478                 return -EINPROGRESS;
6479
6480         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
6481                                                   info->attrs);
6482
6483         err = PTR_ERR_OR_ZERO(sched_scan_req);
6484         if (err)
6485                 goto out_err;
6486
6487         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
6488         if (err)
6489                 goto out_free;
6490
6491         sched_scan_req->dev = dev;
6492         sched_scan_req->wiphy = &rdev->wiphy;
6493
6494         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
6495                 sched_scan_req->owner_nlportid = info->snd_portid;
6496
6497         rcu_assign_pointer(rdev->sched_scan_req, sched_scan_req);
6498
6499         nl80211_send_sched_scan(rdev, dev,
6500                                 NL80211_CMD_START_SCHED_SCAN);
6501         return 0;
6502
6503 out_free:
6504         kfree(sched_scan_req);
6505 out_err:
6506         return err;
6507 }
6508
6509 static int nl80211_stop_sched_scan(struct sk_buff *skb,
6510                                    struct genl_info *info)
6511 {
6512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6513
6514         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
6515             !rdev->ops->sched_scan_stop)
6516                 return -EOPNOTSUPP;
6517
6518         return __cfg80211_stop_sched_scan(rdev, false);
6519 }
6520
6521 static int nl80211_start_radar_detection(struct sk_buff *skb,
6522                                          struct genl_info *info)
6523 {
6524         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6525         struct net_device *dev = info->user_ptr[1];
6526         struct wireless_dev *wdev = dev->ieee80211_ptr;
6527         struct cfg80211_chan_def chandef;
6528         enum nl80211_dfs_regions dfs_region;
6529         unsigned int cac_time_ms;
6530         int err;
6531
6532         dfs_region = reg_get_dfs_region(wdev->wiphy);
6533         if (dfs_region == NL80211_DFS_UNSET)
6534                 return -EINVAL;
6535
6536         err = nl80211_parse_chandef(rdev, info, &chandef);
6537         if (err)
6538                 return err;
6539
6540         if (netif_carrier_ok(dev))
6541                 return -EBUSY;
6542
6543         if (wdev->cac_started)
6544                 return -EBUSY;
6545
6546         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
6547                                             wdev->iftype);
6548         if (err < 0)
6549                 return err;
6550
6551         if (err == 0)
6552                 return -EINVAL;
6553
6554         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
6555                 return -EINVAL;
6556
6557         if (!rdev->ops->start_radar_detection)
6558                 return -EOPNOTSUPP;
6559
6560         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
6561         if (WARN_ON(!cac_time_ms))
6562                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
6563
6564         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef,
6565                                                cac_time_ms);
6566         if (!err) {
6567                 wdev->chandef = chandef;
6568                 wdev->cac_started = true;
6569                 wdev->cac_start_time = jiffies;
6570                 wdev->cac_time_ms = cac_time_ms;
6571         }
6572         return err;
6573 }
6574
6575 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
6576 {
6577         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6578         struct net_device *dev = info->user_ptr[1];
6579         struct wireless_dev *wdev = dev->ieee80211_ptr;
6580         struct cfg80211_csa_settings params;
6581         /* csa_attrs is defined static to avoid waste of stack size - this
6582          * function is called under RTNL lock, so this should not be a problem.
6583          */
6584         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
6585         int err;
6586         bool need_new_beacon = false;
6587         int len, i;
6588         u32 cs_count;
6589
6590         if (!rdev->ops->channel_switch ||
6591             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
6592                 return -EOPNOTSUPP;
6593
6594         switch (dev->ieee80211_ptr->iftype) {
6595         case NL80211_IFTYPE_AP:
6596         case NL80211_IFTYPE_P2P_GO:
6597                 need_new_beacon = true;
6598
6599                 /* useless if AP is not running */
6600                 if (!wdev->beacon_interval)
6601                         return -ENOTCONN;
6602                 break;
6603         case NL80211_IFTYPE_ADHOC:
6604                 if (!wdev->ssid_len)
6605                         return -ENOTCONN;
6606                 break;
6607         case NL80211_IFTYPE_MESH_POINT:
6608                 if (!wdev->mesh_id_len)
6609                         return -ENOTCONN;
6610                 break;
6611         default:
6612                 return -EOPNOTSUPP;
6613         }
6614
6615         memset(&params, 0, sizeof(params));
6616
6617         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6618             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
6619                 return -EINVAL;
6620
6621         /* only important for AP, IBSS and mesh create IEs internally */
6622         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
6623                 return -EINVAL;
6624
6625         /* Even though the attribute is u32, the specification says
6626          * u8, so let's make sure we don't overflow.
6627          */
6628         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
6629         if (cs_count > 255)
6630                 return -EINVAL;
6631
6632         params.count = cs_count;
6633
6634         if (!need_new_beacon)
6635                 goto skip_beacons;
6636
6637         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
6638         if (err)
6639                 return err;
6640
6641         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
6642                                info->attrs[NL80211_ATTR_CSA_IES],
6643                                nl80211_policy);
6644         if (err)
6645                 return err;
6646
6647         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
6648         if (err)
6649                 return err;
6650
6651         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
6652                 return -EINVAL;
6653
6654         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6655         if (!len || (len % sizeof(u16)))
6656                 return -EINVAL;
6657
6658         params.n_counter_offsets_beacon = len / sizeof(u16);
6659         if (rdev->wiphy.max_num_csa_counters &&
6660             (params.n_counter_offsets_beacon >
6661              rdev->wiphy.max_num_csa_counters))
6662                 return -EINVAL;
6663
6664         params.counter_offsets_beacon =
6665                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
6666
6667         /* sanity checks - counters should fit and be the same */
6668         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
6669                 u16 offset = params.counter_offsets_beacon[i];
6670
6671                 if (offset >= params.beacon_csa.tail_len)
6672                         return -EINVAL;
6673
6674                 if (params.beacon_csa.tail[offset] != params.count)
6675                         return -EINVAL;
6676         }
6677
6678         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
6679                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6680                 if (!len || (len % sizeof(u16)))
6681                         return -EINVAL;
6682
6683                 params.n_counter_offsets_presp = len / sizeof(u16);
6684                 if (rdev->wiphy.max_num_csa_counters &&
6685                     (params.n_counter_offsets_presp >
6686                      rdev->wiphy.max_num_csa_counters))
6687                         return -EINVAL;
6688
6689                 params.counter_offsets_presp =
6690                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
6691
6692                 /* sanity checks - counters should fit and be the same */
6693                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
6694                         u16 offset = params.counter_offsets_presp[i];
6695
6696                         if (offset >= params.beacon_csa.probe_resp_len)
6697                                 return -EINVAL;
6698
6699                         if (params.beacon_csa.probe_resp[offset] !=
6700                             params.count)
6701                                 return -EINVAL;
6702                 }
6703         }
6704
6705 skip_beacons:
6706         err = nl80211_parse_chandef(rdev, info, &params.chandef);
6707         if (err)
6708                 return err;
6709
6710         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
6711                                            wdev->iftype))
6712                 return -EINVAL;
6713
6714         err = cfg80211_chandef_dfs_required(wdev->wiphy,
6715                                             &params.chandef,
6716                                             wdev->iftype);
6717         if (err < 0)
6718                 return err;
6719
6720         if (err > 0)
6721                 params.radar_required = true;
6722
6723         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
6724                 params.block_tx = true;
6725
6726         wdev_lock(wdev);
6727         err = rdev_channel_switch(rdev, dev, &params);
6728         wdev_unlock(wdev);
6729
6730         return err;
6731 }
6732
6733 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
6734                             u32 seq, int flags,
6735                             struct cfg80211_registered_device *rdev,
6736                             struct wireless_dev *wdev,
6737                             struct cfg80211_internal_bss *intbss)
6738 {
6739         struct cfg80211_bss *res = &intbss->pub;
6740         const struct cfg80211_bss_ies *ies;
6741         void *hdr;
6742         struct nlattr *bss;
6743
6744         ASSERT_WDEV_LOCK(wdev);
6745
6746         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6747                              NL80211_CMD_NEW_SCAN_RESULTS);
6748         if (!hdr)
6749                 return -1;
6750
6751         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6752
6753         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
6754                 goto nla_put_failure;
6755         if (wdev->netdev &&
6756             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
6757                 goto nla_put_failure;
6758         if (nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
6759                 goto nla_put_failure;
6760
6761         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
6762         if (!bss)
6763                 goto nla_put_failure;
6764         if ((!is_zero_ether_addr(res->bssid) &&
6765              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
6766                 goto nla_put_failure;
6767
6768         rcu_read_lock();
6769         /* indicate whether we have probe response data or not */
6770         if (rcu_access_pointer(res->proberesp_ies) &&
6771             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
6772                 goto fail_unlock_rcu;
6773
6774         /* this pointer prefers to be pointed to probe response data
6775          * but is always valid
6776          */
6777         ies = rcu_dereference(res->ies);
6778         if (ies) {
6779                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
6780                         goto fail_unlock_rcu;
6781                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
6782                                         ies->len, ies->data))
6783                         goto fail_unlock_rcu;
6784         }
6785
6786         /* and this pointer is always (unless driver didn't know) beacon data */
6787         ies = rcu_dereference(res->beacon_ies);
6788         if (ies && ies->from_beacon) {
6789                 if (nla_put_u64(msg, NL80211_BSS_BEACON_TSF, ies->tsf))
6790                         goto fail_unlock_rcu;
6791                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
6792                                         ies->len, ies->data))
6793                         goto fail_unlock_rcu;
6794         }
6795         rcu_read_unlock();
6796
6797         if (res->beacon_interval &&
6798             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
6799                 goto nla_put_failure;
6800         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
6801             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
6802             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
6803             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
6804                         jiffies_to_msecs(jiffies - intbss->ts)))
6805                 goto nla_put_failure;
6806
6807         if (intbss->ts_boottime &&
6808             nla_put_u64(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
6809                         intbss->ts_boottime))
6810                 goto nla_put_failure;
6811
6812         switch (rdev->wiphy.signal_type) {
6813         case CFG80211_SIGNAL_TYPE_MBM:
6814                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
6815                         goto nla_put_failure;
6816                 break;
6817         case CFG80211_SIGNAL_TYPE_UNSPEC:
6818                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
6819                         goto nla_put_failure;
6820                 break;
6821         default:
6822                 break;
6823         }
6824
6825         switch (wdev->iftype) {
6826         case NL80211_IFTYPE_P2P_CLIENT:
6827         case NL80211_IFTYPE_STATION:
6828                 if (intbss == wdev->current_bss &&
6829                     nla_put_u32(msg, NL80211_BSS_STATUS,
6830                                 NL80211_BSS_STATUS_ASSOCIATED))
6831                         goto nla_put_failure;
6832                 break;
6833         case NL80211_IFTYPE_ADHOC:
6834                 if (intbss == wdev->current_bss &&
6835                     nla_put_u32(msg, NL80211_BSS_STATUS,
6836                                 NL80211_BSS_STATUS_IBSS_JOINED))
6837                         goto nla_put_failure;
6838                 break;
6839         default:
6840                 break;
6841         }
6842
6843         nla_nest_end(msg, bss);
6844
6845         genlmsg_end(msg, hdr);
6846         return 0;
6847
6848  fail_unlock_rcu:
6849         rcu_read_unlock();
6850  nla_put_failure:
6851         genlmsg_cancel(msg, hdr);
6852         return -EMSGSIZE;
6853 }
6854
6855 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
6856 {
6857         struct cfg80211_registered_device *rdev;
6858         struct cfg80211_internal_bss *scan;
6859         struct wireless_dev *wdev;
6860         int start = cb->args[2], idx = 0;
6861         int err;
6862
6863         rtnl_lock();
6864         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6865         if (err) {
6866                 rtnl_unlock();
6867                 return err;
6868         }
6869
6870         wdev_lock(wdev);
6871         spin_lock_bh(&rdev->bss_lock);
6872         cfg80211_bss_expire(rdev);
6873
6874         cb->seq = rdev->bss_generation;
6875
6876         list_for_each_entry(scan, &rdev->bss_list, list) {
6877                 if (++idx <= start)
6878                         continue;
6879                 if (nl80211_send_bss(skb, cb,
6880                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
6881                                 rdev, wdev, scan) < 0) {
6882                         idx--;
6883                         break;
6884                 }
6885         }
6886
6887         spin_unlock_bh(&rdev->bss_lock);
6888         wdev_unlock(wdev);
6889
6890         cb->args[2] = idx;
6891         rtnl_unlock();
6892
6893         return skb->len;
6894 }
6895
6896 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
6897                                int flags, struct net_device *dev,
6898                                bool allow_radio_stats,
6899                                struct survey_info *survey)
6900 {
6901         void *hdr;
6902         struct nlattr *infoattr;
6903
6904         /* skip radio stats if userspace didn't request them */
6905         if (!survey->channel && !allow_radio_stats)
6906                 return 0;
6907
6908         hdr = nl80211hdr_put(msg, portid, seq, flags,
6909                              NL80211_CMD_NEW_SURVEY_RESULTS);
6910         if (!hdr)
6911                 return -ENOMEM;
6912
6913         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
6914                 goto nla_put_failure;
6915
6916         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
6917         if (!infoattr)
6918                 goto nla_put_failure;
6919
6920         if (survey->channel &&
6921             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
6922                         survey->channel->center_freq))
6923                 goto nla_put_failure;
6924
6925         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
6926             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
6927                 goto nla_put_failure;
6928         if ((survey->filled & SURVEY_INFO_IN_USE) &&
6929             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
6930                 goto nla_put_failure;
6931         if ((survey->filled & SURVEY_INFO_TIME) &&
6932             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME,
6933                         survey->time))
6934                 goto nla_put_failure;
6935         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
6936             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_BUSY,
6937                         survey->time_busy))
6938                 goto nla_put_failure;
6939         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
6940             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
6941                         survey->time_ext_busy))
6942                 goto nla_put_failure;
6943         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
6944             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_RX,
6945                         survey->time_rx))
6946                 goto nla_put_failure;
6947         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
6948             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_TX,
6949                         survey->time_tx))
6950                 goto nla_put_failure;
6951         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
6952             nla_put_u64(msg, NL80211_SURVEY_INFO_TIME_SCAN,
6953                         survey->time_scan))
6954                 goto nla_put_failure;
6955
6956         nla_nest_end(msg, infoattr);
6957
6958         genlmsg_end(msg, hdr);
6959         return 0;
6960
6961  nla_put_failure:
6962         genlmsg_cancel(msg, hdr);
6963         return -EMSGSIZE;
6964 }
6965
6966 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
6967 {
6968         struct survey_info survey;
6969         struct cfg80211_registered_device *rdev;
6970         struct wireless_dev *wdev;
6971         int survey_idx = cb->args[2];
6972         int res;
6973         bool radio_stats;
6974
6975         rtnl_lock();
6976         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
6977         if (res)
6978                 goto out_err;
6979
6980         /* prepare_wdev_dump parsed the attributes */
6981         radio_stats = nl80211_fam.attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
6982
6983         if (!wdev->netdev) {
6984                 res = -EINVAL;
6985                 goto out_err;
6986         }
6987
6988         if (!rdev->ops->dump_survey) {
6989                 res = -EOPNOTSUPP;
6990                 goto out_err;
6991         }
6992
6993         while (1) {
6994                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
6995                 if (res == -ENOENT)
6996                         break;
6997                 if (res)
6998                         goto out_err;
6999
7000                 /* don't send disabled channels, but do send non-channel data */
7001                 if (survey.channel &&
7002                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7003                         survey_idx++;
7004                         continue;
7005                 }
7006
7007                 if (nl80211_send_survey(skb,
7008                                 NETLINK_CB(cb->skb).portid,
7009                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7010                                 wdev->netdev, radio_stats, &survey) < 0)
7011                         goto out;
7012                 survey_idx++;
7013         }
7014
7015  out:
7016         cb->args[2] = survey_idx;
7017         res = skb->len;
7018  out_err:
7019         rtnl_unlock();
7020         return res;
7021 }
7022
7023 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7024 {
7025         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7026                                   NL80211_WPA_VERSION_2));
7027 }
7028
7029 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7030 {
7031         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7032         struct net_device *dev = info->user_ptr[1];
7033         struct ieee80211_channel *chan;
7034         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
7035         int err, ssid_len, ie_len = 0, sae_data_len = 0;
7036         enum nl80211_auth_type auth_type;
7037         struct key_parse key;
7038         bool local_state_change;
7039
7040         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7041                 return -EINVAL;
7042
7043         if (!info->attrs[NL80211_ATTR_MAC])
7044                 return -EINVAL;
7045
7046         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7047                 return -EINVAL;
7048
7049         if (!info->attrs[NL80211_ATTR_SSID])
7050                 return -EINVAL;
7051
7052         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7053                 return -EINVAL;
7054
7055         err = nl80211_parse_key(info, &key);
7056         if (err)
7057                 return err;
7058
7059         if (key.idx >= 0) {
7060                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7061                         return -EINVAL;
7062                 if (!key.p.key || !key.p.key_len)
7063                         return -EINVAL;
7064                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7065                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7066                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7067                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7068                         return -EINVAL;
7069                 if (key.idx > 4)
7070                         return -EINVAL;
7071         } else {
7072                 key.p.key_len = 0;
7073                 key.p.key = NULL;
7074         }
7075
7076         if (key.idx >= 0) {
7077                 int i;
7078                 bool ok = false;
7079                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
7080                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
7081                                 ok = true;
7082                                 break;
7083                         }
7084                 }
7085                 if (!ok)
7086                         return -EINVAL;
7087         }
7088
7089         if (!rdev->ops->auth)
7090                 return -EOPNOTSUPP;
7091
7092         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7093             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7094                 return -EOPNOTSUPP;
7095
7096         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7097         chan = nl80211_get_valid_chan(&rdev->wiphy,
7098                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7099         if (!chan)
7100                 return -EINVAL;
7101
7102         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7103         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7104
7105         if (info->attrs[NL80211_ATTR_IE]) {
7106                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7107                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7108         }
7109
7110         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7111         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
7112                 return -EINVAL;
7113
7114         if (auth_type == NL80211_AUTHTYPE_SAE &&
7115             !info->attrs[NL80211_ATTR_SAE_DATA])
7116                 return -EINVAL;
7117
7118         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
7119                 if (auth_type != NL80211_AUTHTYPE_SAE)
7120                         return -EINVAL;
7121                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
7122                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
7123                 /* need to include at least Auth Transaction and Status Code */
7124                 if (sae_data_len < 4)
7125                         return -EINVAL;
7126         }
7127
7128         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7129
7130         /*
7131          * Since we no longer track auth state, ignore
7132          * requests to only change local state.
7133          */
7134         if (local_state_change)
7135                 return 0;
7136
7137         wdev_lock(dev->ieee80211_ptr);
7138         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
7139                                  ssid, ssid_len, ie, ie_len,
7140                                  key.p.key, key.p.key_len, key.idx,
7141                                  sae_data, sae_data_len);
7142         wdev_unlock(dev->ieee80211_ptr);
7143         return err;
7144 }
7145
7146 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
7147                                    struct genl_info *info,
7148                                    struct cfg80211_crypto_settings *settings,
7149                                    int cipher_limit)
7150 {
7151         memset(settings, 0, sizeof(*settings));
7152
7153         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
7154
7155         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
7156                 u16 proto;
7157                 proto = nla_get_u16(
7158                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
7159                 settings->control_port_ethertype = cpu_to_be16(proto);
7160                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
7161                     proto != ETH_P_PAE)
7162                         return -EINVAL;
7163                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
7164                         settings->control_port_no_encrypt = true;
7165         } else
7166                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
7167
7168         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
7169                 void *data;
7170                 int len, i;
7171
7172                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7173                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
7174                 settings->n_ciphers_pairwise = len / sizeof(u32);
7175
7176                 if (len % sizeof(u32))
7177                         return -EINVAL;
7178
7179                 if (settings->n_ciphers_pairwise > cipher_limit)
7180                         return -EINVAL;
7181
7182                 memcpy(settings->ciphers_pairwise, data, len);
7183
7184                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
7185                         if (!cfg80211_supported_cipher_suite(
7186                                         &rdev->wiphy,
7187                                         settings->ciphers_pairwise[i]))
7188                                 return -EINVAL;
7189         }
7190
7191         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
7192                 settings->cipher_group =
7193                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
7194                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
7195                                                      settings->cipher_group))
7196                         return -EINVAL;
7197         }
7198
7199         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
7200                 settings->wpa_versions =
7201                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
7202                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
7203                         return -EINVAL;
7204         }
7205
7206         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
7207                 void *data;
7208                 int len;
7209
7210                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
7211                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
7212                 settings->n_akm_suites = len / sizeof(u32);
7213
7214                 if (len % sizeof(u32))
7215                         return -EINVAL;
7216
7217                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
7218                         return -EINVAL;
7219
7220                 memcpy(settings->akm_suites, data, len);
7221         }
7222
7223         return 0;
7224 }
7225
7226 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
7227 {
7228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7229         struct net_device *dev = info->user_ptr[1];
7230         struct ieee80211_channel *chan;
7231         struct cfg80211_assoc_request req = {};
7232         const u8 *bssid, *ssid;
7233         int err, ssid_len = 0;
7234
7235         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7236                 return -EINVAL;
7237
7238         if (!info->attrs[NL80211_ATTR_MAC] ||
7239             !info->attrs[NL80211_ATTR_SSID] ||
7240             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
7241                 return -EINVAL;
7242
7243         if (!rdev->ops->assoc)
7244                 return -EOPNOTSUPP;
7245
7246         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7247             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7248                 return -EOPNOTSUPP;
7249
7250         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7251
7252         chan = nl80211_get_valid_chan(&rdev->wiphy,
7253                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7254         if (!chan)
7255                 return -EINVAL;
7256
7257         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7258         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7259
7260         if (info->attrs[NL80211_ATTR_IE]) {
7261                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7262                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7263         }
7264
7265         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7266                 enum nl80211_mfp mfp =
7267                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7268                 if (mfp == NL80211_MFP_REQUIRED)
7269                         req.use_mfp = true;
7270                 else if (mfp != NL80211_MFP_NO)
7271                         return -EINVAL;
7272         }
7273
7274         if (info->attrs[NL80211_ATTR_PREV_BSSID])
7275                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
7276
7277         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7278                 req.flags |= ASSOC_REQ_DISABLE_HT;
7279
7280         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7281                 memcpy(&req.ht_capa_mask,
7282                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7283                        sizeof(req.ht_capa_mask));
7284
7285         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7286                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7287                         return -EINVAL;
7288                 memcpy(&req.ht_capa,
7289                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7290                        sizeof(req.ht_capa));
7291         }
7292
7293         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7294                 req.flags |= ASSOC_REQ_DISABLE_VHT;
7295
7296         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7297                 memcpy(&req.vht_capa_mask,
7298                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7299                        sizeof(req.vht_capa_mask));
7300
7301         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7302                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7303                         return -EINVAL;
7304                 memcpy(&req.vht_capa,
7305                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7306                        sizeof(req.vht_capa));
7307         }
7308
7309         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
7310                 if (!(rdev->wiphy.features &
7311                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
7312                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET))
7313                         return -EINVAL;
7314                 req.flags |= ASSOC_REQ_USE_RRM;
7315         }
7316
7317         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
7318         if (!err) {
7319                 wdev_lock(dev->ieee80211_ptr);
7320                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
7321                                           ssid, ssid_len, &req);
7322                 wdev_unlock(dev->ieee80211_ptr);
7323         }
7324
7325         return err;
7326 }
7327
7328 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
7329 {
7330         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7331         struct net_device *dev = info->user_ptr[1];
7332         const u8 *ie = NULL, *bssid;
7333         int ie_len = 0, err;
7334         u16 reason_code;
7335         bool local_state_change;
7336
7337         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7338                 return -EINVAL;
7339
7340         if (!info->attrs[NL80211_ATTR_MAC])
7341                 return -EINVAL;
7342
7343         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7344                 return -EINVAL;
7345
7346         if (!rdev->ops->deauth)
7347                 return -EOPNOTSUPP;
7348
7349         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7350             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7351                 return -EOPNOTSUPP;
7352
7353         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7354
7355         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7356         if (reason_code == 0) {
7357                 /* Reason Code 0 is reserved */
7358                 return -EINVAL;
7359         }
7360
7361         if (info->attrs[NL80211_ATTR_IE]) {
7362                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7363                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7364         }
7365
7366         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7367
7368         wdev_lock(dev->ieee80211_ptr);
7369         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
7370                                    local_state_change);
7371         wdev_unlock(dev->ieee80211_ptr);
7372         return err;
7373 }
7374
7375 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
7376 {
7377         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7378         struct net_device *dev = info->user_ptr[1];
7379         const u8 *ie = NULL, *bssid;
7380         int ie_len = 0, err;
7381         u16 reason_code;
7382         bool local_state_change;
7383
7384         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7385                 return -EINVAL;
7386
7387         if (!info->attrs[NL80211_ATTR_MAC])
7388                 return -EINVAL;
7389
7390         if (!info->attrs[NL80211_ATTR_REASON_CODE])
7391                 return -EINVAL;
7392
7393         if (!rdev->ops->disassoc)
7394                 return -EOPNOTSUPP;
7395
7396         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7397             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7398                 return -EOPNOTSUPP;
7399
7400         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7401
7402         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
7403         if (reason_code == 0) {
7404                 /* Reason Code 0 is reserved */
7405                 return -EINVAL;
7406         }
7407
7408         if (info->attrs[NL80211_ATTR_IE]) {
7409                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7410                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7411         }
7412
7413         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
7414
7415         wdev_lock(dev->ieee80211_ptr);
7416         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
7417                                      local_state_change);
7418         wdev_unlock(dev->ieee80211_ptr);
7419         return err;
7420 }
7421
7422 static bool
7423 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
7424                          int mcast_rate[IEEE80211_NUM_BANDS],
7425                          int rateval)
7426 {
7427         struct wiphy *wiphy = &rdev->wiphy;
7428         bool found = false;
7429         int band, i;
7430
7431         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
7432                 struct ieee80211_supported_band *sband;
7433
7434                 sband = wiphy->bands[band];
7435                 if (!sband)
7436                         continue;
7437
7438                 for (i = 0; i < sband->n_bitrates; i++) {
7439                         if (sband->bitrates[i].bitrate == rateval) {
7440                                 mcast_rate[band] = i + 1;
7441                                 found = true;
7442                                 break;
7443                         }
7444                 }
7445         }
7446
7447         return found;
7448 }
7449
7450 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
7451 {
7452         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7453         struct net_device *dev = info->user_ptr[1];
7454         struct cfg80211_ibss_params ibss;
7455         struct wiphy *wiphy;
7456         struct cfg80211_cached_keys *connkeys = NULL;
7457         int err;
7458
7459         memset(&ibss, 0, sizeof(ibss));
7460
7461         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7462                 return -EINVAL;
7463
7464         if (!info->attrs[NL80211_ATTR_SSID] ||
7465             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7466                 return -EINVAL;
7467
7468         ibss.beacon_interval = 100;
7469
7470         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7471                 ibss.beacon_interval =
7472                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7473                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
7474                         return -EINVAL;
7475         }
7476
7477         if (!rdev->ops->join_ibss)
7478                 return -EOPNOTSUPP;
7479
7480         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7481                 return -EOPNOTSUPP;
7482
7483         wiphy = &rdev->wiphy;
7484
7485         if (info->attrs[NL80211_ATTR_MAC]) {
7486                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7487
7488                 if (!is_valid_ether_addr(ibss.bssid))
7489                         return -EINVAL;
7490         }
7491         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7492         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7493
7494         if (info->attrs[NL80211_ATTR_IE]) {
7495                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7496                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7497         }
7498
7499         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
7500         if (err)
7501                 return err;
7502
7503         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
7504                                      NL80211_IFTYPE_ADHOC))
7505                 return -EINVAL;
7506
7507         switch (ibss.chandef.width) {
7508         case NL80211_CHAN_WIDTH_5:
7509         case NL80211_CHAN_WIDTH_10:
7510         case NL80211_CHAN_WIDTH_20_NOHT:
7511                 break;
7512         case NL80211_CHAN_WIDTH_20:
7513         case NL80211_CHAN_WIDTH_40:
7514                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7515                         return -EINVAL;
7516                 break;
7517         case NL80211_CHAN_WIDTH_80:
7518         case NL80211_CHAN_WIDTH_80P80:
7519         case NL80211_CHAN_WIDTH_160:
7520                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
7521                         return -EINVAL;
7522                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
7523                                              NL80211_EXT_FEATURE_VHT_IBSS))
7524                         return -EINVAL;
7525                 break;
7526         default:
7527                 return -EINVAL;
7528         }
7529
7530         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
7531         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
7532
7533         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
7534                 u8 *rates =
7535                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7536                 int n_rates =
7537                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
7538                 struct ieee80211_supported_band *sband =
7539                         wiphy->bands[ibss.chandef.chan->band];
7540
7541                 err = ieee80211_get_ratemask(sband, rates, n_rates,
7542                                              &ibss.basic_rates);
7543                 if (err)
7544                         return err;
7545         }
7546
7547         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7548                 memcpy(&ibss.ht_capa_mask,
7549                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7550                        sizeof(ibss.ht_capa_mask));
7551
7552         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7553                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7554                         return -EINVAL;
7555                 memcpy(&ibss.ht_capa,
7556                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7557                        sizeof(ibss.ht_capa));
7558         }
7559
7560         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7561             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
7562                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7563                 return -EINVAL;
7564
7565         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7566                 bool no_ht = false;
7567
7568                 connkeys = nl80211_parse_connkeys(rdev,
7569                                           info->attrs[NL80211_ATTR_KEYS],
7570                                           &no_ht);
7571                 if (IS_ERR(connkeys))
7572                         return PTR_ERR(connkeys);
7573
7574                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
7575                     no_ht) {
7576                         kfree(connkeys);
7577                         return -EINVAL;
7578                 }
7579         }
7580
7581         ibss.control_port =
7582                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
7583
7584         ibss.userspace_handles_dfs =
7585                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
7586
7587         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
7588         if (err)
7589                 kzfree(connkeys);
7590         return err;
7591 }
7592
7593 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
7594 {
7595         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7596         struct net_device *dev = info->user_ptr[1];
7597
7598         if (!rdev->ops->leave_ibss)
7599                 return -EOPNOTSUPP;
7600
7601         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
7602                 return -EOPNOTSUPP;
7603
7604         return cfg80211_leave_ibss(rdev, dev, false);
7605 }
7606
7607 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
7608 {
7609         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7610         struct net_device *dev = info->user_ptr[1];
7611         int mcast_rate[IEEE80211_NUM_BANDS];
7612         u32 nla_rate;
7613         int err;
7614
7615         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
7616             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
7617             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
7618                 return -EOPNOTSUPP;
7619
7620         if (!rdev->ops->set_mcast_rate)
7621                 return -EOPNOTSUPP;
7622
7623         memset(mcast_rate, 0, sizeof(mcast_rate));
7624
7625         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
7626                 return -EINVAL;
7627
7628         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
7629         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
7630                 return -EINVAL;
7631
7632         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
7633
7634         return err;
7635 }
7636
7637 static struct sk_buff *
7638 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
7639                             struct wireless_dev *wdev, int approxlen,
7640                             u32 portid, u32 seq, enum nl80211_commands cmd,
7641                             enum nl80211_attrs attr,
7642                             const struct nl80211_vendor_cmd_info *info,
7643                             gfp_t gfp)
7644 {
7645         struct sk_buff *skb;
7646         void *hdr;
7647         struct nlattr *data;
7648
7649         skb = nlmsg_new(approxlen + 100, gfp);
7650         if (!skb)
7651                 return NULL;
7652
7653         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
7654         if (!hdr) {
7655                 kfree_skb(skb);
7656                 return NULL;
7657         }
7658
7659         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
7660                 goto nla_put_failure;
7661
7662         if (info) {
7663                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
7664                                 info->vendor_id))
7665                         goto nla_put_failure;
7666                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
7667                                 info->subcmd))
7668                         goto nla_put_failure;
7669         }
7670
7671         if (wdev) {
7672                 if (nla_put_u64(skb, NL80211_ATTR_WDEV,
7673                                 wdev_id(wdev)))
7674                         goto nla_put_failure;
7675                 if (wdev->netdev &&
7676                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
7677                                 wdev->netdev->ifindex))
7678                         goto nla_put_failure;
7679         }
7680
7681         data = nla_nest_start(skb, attr);
7682
7683         ((void **)skb->cb)[0] = rdev;
7684         ((void **)skb->cb)[1] = hdr;
7685         ((void **)skb->cb)[2] = data;
7686
7687         return skb;
7688
7689  nla_put_failure:
7690         kfree_skb(skb);
7691         return NULL;
7692 }
7693
7694 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
7695                                            struct wireless_dev *wdev,
7696                                            enum nl80211_commands cmd,
7697                                            enum nl80211_attrs attr,
7698                                            int vendor_event_idx,
7699                                            int approxlen, gfp_t gfp)
7700 {
7701         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
7702         const struct nl80211_vendor_cmd_info *info;
7703
7704         switch (cmd) {
7705         case NL80211_CMD_TESTMODE:
7706                 if (WARN_ON(vendor_event_idx != -1))
7707                         return NULL;
7708                 info = NULL;
7709                 break;
7710         case NL80211_CMD_VENDOR:
7711                 if (WARN_ON(vendor_event_idx < 0 ||
7712                             vendor_event_idx >= wiphy->n_vendor_events))
7713                         return NULL;
7714                 info = &wiphy->vendor_events[vendor_event_idx];
7715                 break;
7716         default:
7717                 WARN_ON(1);
7718                 return NULL;
7719         }
7720
7721         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
7722                                            cmd, attr, info, gfp);
7723 }
7724 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
7725
7726 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
7727 {
7728         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
7729         void *hdr = ((void **)skb->cb)[1];
7730         struct nlattr *data = ((void **)skb->cb)[2];
7731         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
7732
7733         /* clear CB data for netlink core to own from now on */
7734         memset(skb->cb, 0, sizeof(skb->cb));
7735
7736         nla_nest_end(skb, data);
7737         genlmsg_end(skb, hdr);
7738
7739         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
7740                 mcgrp = NL80211_MCGRP_VENDOR;
7741
7742         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
7743                                 mcgrp, gfp);
7744 }
7745 EXPORT_SYMBOL(__cfg80211_send_event_skb);
7746
7747 #ifdef CONFIG_NL80211_TESTMODE
7748 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
7749 {
7750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7751         struct wireless_dev *wdev =
7752                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
7753         int err;
7754
7755         if (!rdev->ops->testmode_cmd)
7756                 return -EOPNOTSUPP;
7757
7758         if (IS_ERR(wdev)) {
7759                 err = PTR_ERR(wdev);
7760                 if (err != -EINVAL)
7761                         return err;
7762                 wdev = NULL;
7763         } else if (wdev->wiphy != &rdev->wiphy) {
7764                 return -EINVAL;
7765         }
7766
7767         if (!info->attrs[NL80211_ATTR_TESTDATA])
7768                 return -EINVAL;
7769
7770         rdev->cur_cmd_info = info;
7771         err = rdev_testmode_cmd(rdev, wdev,
7772                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
7773                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
7774         rdev->cur_cmd_info = NULL;
7775
7776         return err;
7777 }
7778
7779 static int nl80211_testmode_dump(struct sk_buff *skb,
7780                                  struct netlink_callback *cb)
7781 {
7782         struct cfg80211_registered_device *rdev;
7783         int err;
7784         long phy_idx;
7785         void *data = NULL;
7786         int data_len = 0;
7787
7788         rtnl_lock();
7789
7790         if (cb->args[0]) {
7791                 /*
7792                  * 0 is a valid index, but not valid for args[0],
7793                  * so we need to offset by 1.
7794                  */
7795                 phy_idx = cb->args[0] - 1;
7796         } else {
7797                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
7798                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
7799                                   nl80211_policy);
7800                 if (err)
7801                         goto out_err;
7802
7803                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
7804                                                   nl80211_fam.attrbuf);
7805                 if (IS_ERR(rdev)) {
7806                         err = PTR_ERR(rdev);
7807                         goto out_err;
7808                 }
7809                 phy_idx = rdev->wiphy_idx;
7810                 rdev = NULL;
7811
7812                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
7813                         cb->args[1] =
7814                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
7815         }
7816
7817         if (cb->args[1]) {
7818                 data = nla_data((void *)cb->args[1]);
7819                 data_len = nla_len((void *)cb->args[1]);
7820         }
7821
7822         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
7823         if (!rdev) {
7824                 err = -ENOENT;
7825                 goto out_err;
7826         }
7827
7828         if (!rdev->ops->testmode_dump) {
7829                 err = -EOPNOTSUPP;
7830                 goto out_err;
7831         }
7832
7833         while (1) {
7834                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
7835                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
7836                                            NL80211_CMD_TESTMODE);
7837                 struct nlattr *tmdata;
7838
7839                 if (!hdr)
7840                         break;
7841
7842                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
7843                         genlmsg_cancel(skb, hdr);
7844                         break;
7845                 }
7846
7847                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
7848                 if (!tmdata) {
7849                         genlmsg_cancel(skb, hdr);
7850                         break;
7851                 }
7852                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
7853                 nla_nest_end(skb, tmdata);
7854
7855                 if (err == -ENOBUFS || err == -ENOENT) {
7856                         genlmsg_cancel(skb, hdr);
7857                         break;
7858                 } else if (err) {
7859                         genlmsg_cancel(skb, hdr);
7860                         goto out_err;
7861                 }
7862
7863                 genlmsg_end(skb, hdr);
7864         }
7865
7866         err = skb->len;
7867         /* see above */
7868         cb->args[0] = phy_idx + 1;
7869  out_err:
7870         rtnl_unlock();
7871         return err;
7872 }
7873 #endif
7874
7875 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
7876 {
7877         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7878         struct net_device *dev = info->user_ptr[1];
7879         struct cfg80211_connect_params connect;
7880         struct wiphy *wiphy;
7881         struct cfg80211_cached_keys *connkeys = NULL;
7882         int err;
7883
7884         memset(&connect, 0, sizeof(connect));
7885
7886         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7887                 return -EINVAL;
7888
7889         if (!info->attrs[NL80211_ATTR_SSID] ||
7890             !nla_len(info->attrs[NL80211_ATTR_SSID]))
7891                 return -EINVAL;
7892
7893         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
7894                 connect.auth_type =
7895                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
7896                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
7897                                              NL80211_CMD_CONNECT))
7898                         return -EINVAL;
7899         } else
7900                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
7901
7902         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
7903
7904         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
7905                                       NL80211_MAX_NR_CIPHER_SUITES);
7906         if (err)
7907                 return err;
7908
7909         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
7910             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
7911                 return -EOPNOTSUPP;
7912
7913         wiphy = &rdev->wiphy;
7914
7915         connect.bg_scan_period = -1;
7916         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
7917                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
7918                 connect.bg_scan_period =
7919                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
7920         }
7921
7922         if (info->attrs[NL80211_ATTR_MAC])
7923                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
7924         else if (info->attrs[NL80211_ATTR_MAC_HINT])
7925                 connect.bssid_hint =
7926                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
7927         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
7928         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
7929
7930         if (info->attrs[NL80211_ATTR_IE]) {
7931                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
7932                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
7933         }
7934
7935         if (info->attrs[NL80211_ATTR_USE_MFP]) {
7936                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
7937                 if (connect.mfp != NL80211_MFP_REQUIRED &&
7938                     connect.mfp != NL80211_MFP_NO)
7939                         return -EINVAL;
7940         } else {
7941                 connect.mfp = NL80211_MFP_NO;
7942         }
7943
7944         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7945                 connect.channel = nl80211_get_valid_chan(
7946                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
7947                 if (!connect.channel)
7948                         return -EINVAL;
7949         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
7950                 connect.channel_hint = nl80211_get_valid_chan(
7951                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
7952                 if (!connect.channel_hint)
7953                         return -EINVAL;
7954         }
7955
7956         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
7957                 connkeys = nl80211_parse_connkeys(rdev,
7958                                           info->attrs[NL80211_ATTR_KEYS], NULL);
7959                 if (IS_ERR(connkeys))
7960                         return PTR_ERR(connkeys);
7961         }
7962
7963         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
7964                 connect.flags |= ASSOC_REQ_DISABLE_HT;
7965
7966         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
7967                 memcpy(&connect.ht_capa_mask,
7968                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
7969                        sizeof(connect.ht_capa_mask));
7970
7971         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
7972                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
7973                         kzfree(connkeys);
7974                         return -EINVAL;
7975                 }
7976                 memcpy(&connect.ht_capa,
7977                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
7978                        sizeof(connect.ht_capa));
7979         }
7980
7981         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
7982                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
7983
7984         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
7985                 memcpy(&connect.vht_capa_mask,
7986                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
7987                        sizeof(connect.vht_capa_mask));
7988
7989         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
7990                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
7991                         kzfree(connkeys);
7992                         return -EINVAL;
7993                 }
7994                 memcpy(&connect.vht_capa,
7995                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
7996                        sizeof(connect.vht_capa));
7997         }
7998
7999         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8000                 if (!(rdev->wiphy.features &
8001                       NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) ||
8002                     !(rdev->wiphy.features & NL80211_FEATURE_QUIET)) {
8003                         kzfree(connkeys);
8004                         return -EINVAL;
8005                 }
8006                 connect.flags |= ASSOC_REQ_USE_RRM;
8007         }
8008
8009         wdev_lock(dev->ieee80211_ptr);
8010         err = cfg80211_connect(rdev, dev, &connect, connkeys, NULL);
8011         wdev_unlock(dev->ieee80211_ptr);
8012         if (err)
8013                 kzfree(connkeys);
8014         return err;
8015 }
8016
8017 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
8018 {
8019         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8020         struct net_device *dev = info->user_ptr[1];
8021         u16 reason;
8022         int ret;
8023
8024         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8025                 reason = WLAN_REASON_DEAUTH_LEAVING;
8026         else
8027                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8028
8029         if (reason == 0)
8030                 return -EINVAL;
8031
8032         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8033             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8034                 return -EOPNOTSUPP;
8035
8036         wdev_lock(dev->ieee80211_ptr);
8037         ret = cfg80211_disconnect(rdev, dev, reason, true);
8038         wdev_unlock(dev->ieee80211_ptr);
8039         return ret;
8040 }
8041
8042 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
8043 {
8044         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8045         struct net *net;
8046         int err;
8047
8048         if (info->attrs[NL80211_ATTR_PID]) {
8049                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
8050
8051                 net = get_net_ns_by_pid(pid);
8052         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
8053                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
8054
8055                 net = get_net_ns_by_fd(fd);
8056         } else {
8057                 return -EINVAL;
8058         }
8059
8060         if (IS_ERR(net))
8061                 return PTR_ERR(net);
8062
8063         err = 0;
8064
8065         /* check if anything to do */
8066         if (!net_eq(wiphy_net(&rdev->wiphy), net))
8067                 err = cfg80211_switch_netns(rdev, net);
8068
8069         put_net(net);
8070         return err;
8071 }
8072
8073 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
8074 {
8075         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8076         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
8077                         struct cfg80211_pmksa *pmksa) = NULL;
8078         struct net_device *dev = info->user_ptr[1];
8079         struct cfg80211_pmksa pmksa;
8080
8081         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
8082
8083         if (!info->attrs[NL80211_ATTR_MAC])
8084                 return -EINVAL;
8085
8086         if (!info->attrs[NL80211_ATTR_PMKID])
8087                 return -EINVAL;
8088
8089         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
8090         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8091
8092         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8093             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8094                 return -EOPNOTSUPP;
8095
8096         switch (info->genlhdr->cmd) {
8097         case NL80211_CMD_SET_PMKSA:
8098                 rdev_ops = rdev->ops->set_pmksa;
8099                 break;
8100         case NL80211_CMD_DEL_PMKSA:
8101                 rdev_ops = rdev->ops->del_pmksa;
8102                 break;
8103         default:
8104                 WARN_ON(1);
8105                 break;
8106         }
8107
8108         if (!rdev_ops)
8109                 return -EOPNOTSUPP;
8110
8111         return rdev_ops(&rdev->wiphy, dev, &pmksa);
8112 }
8113
8114 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
8115 {
8116         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8117         struct net_device *dev = info->user_ptr[1];
8118
8119         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8120             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8121                 return -EOPNOTSUPP;
8122
8123         if (!rdev->ops->flush_pmksa)
8124                 return -EOPNOTSUPP;
8125
8126         return rdev_flush_pmksa(rdev, dev);
8127 }
8128
8129 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
8130 {
8131         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8132         struct net_device *dev = info->user_ptr[1];
8133         u8 action_code, dialog_token;
8134         u32 peer_capability = 0;
8135         u16 status_code;
8136         u8 *peer;
8137         bool initiator;
8138
8139         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8140             !rdev->ops->tdls_mgmt)
8141                 return -EOPNOTSUPP;
8142
8143         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
8144             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
8145             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
8146             !info->attrs[NL80211_ATTR_IE] ||
8147             !info->attrs[NL80211_ATTR_MAC])
8148                 return -EINVAL;
8149
8150         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8151         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
8152         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
8153         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
8154         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
8155         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
8156                 peer_capability =
8157                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
8158
8159         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
8160                               dialog_token, status_code, peer_capability,
8161                               initiator,
8162                               nla_data(info->attrs[NL80211_ATTR_IE]),
8163                               nla_len(info->attrs[NL80211_ATTR_IE]));
8164 }
8165
8166 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
8167 {
8168         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8169         struct net_device *dev = info->user_ptr[1];
8170         enum nl80211_tdls_operation operation;
8171         u8 *peer;
8172
8173         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
8174             !rdev->ops->tdls_oper)
8175                 return -EOPNOTSUPP;
8176
8177         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
8178             !info->attrs[NL80211_ATTR_MAC])
8179                 return -EINVAL;
8180
8181         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
8182         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
8183
8184         return rdev_tdls_oper(rdev, dev, peer, operation);
8185 }
8186
8187 static int nl80211_remain_on_channel(struct sk_buff *skb,
8188                                      struct genl_info *info)
8189 {
8190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8191         struct wireless_dev *wdev = info->user_ptr[1];
8192         struct cfg80211_chan_def chandef;
8193         struct sk_buff *msg;
8194         void *hdr;
8195         u64 cookie;
8196         u32 duration;
8197         int err;
8198
8199         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
8200             !info->attrs[NL80211_ATTR_DURATION])
8201                 return -EINVAL;
8202
8203         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8204
8205         if (!rdev->ops->remain_on_channel ||
8206             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
8207                 return -EOPNOTSUPP;
8208
8209         /*
8210          * We should be on that channel for at least a minimum amount of
8211          * time (10ms) but no longer than the driver supports.
8212          */
8213         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8214             duration > rdev->wiphy.max_remain_on_channel_duration)
8215                 return -EINVAL;
8216
8217         err = nl80211_parse_chandef(rdev, info, &chandef);
8218         if (err)
8219                 return err;
8220
8221         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8222         if (!msg)
8223                 return -ENOMEM;
8224
8225         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8226                              NL80211_CMD_REMAIN_ON_CHANNEL);
8227         if (!hdr) {
8228                 err = -ENOBUFS;
8229                 goto free_msg;
8230         }
8231
8232         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
8233                                      duration, &cookie);
8234
8235         if (err)
8236                 goto free_msg;
8237
8238         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8239                 goto nla_put_failure;
8240
8241         genlmsg_end(msg, hdr);
8242
8243         return genlmsg_reply(msg, info);
8244
8245  nla_put_failure:
8246         err = -ENOBUFS;
8247  free_msg:
8248         nlmsg_free(msg);
8249         return err;
8250 }
8251
8252 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
8253                                             struct genl_info *info)
8254 {
8255         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8256         struct wireless_dev *wdev = info->user_ptr[1];
8257         u64 cookie;
8258
8259         if (!info->attrs[NL80211_ATTR_COOKIE])
8260                 return -EINVAL;
8261
8262         if (!rdev->ops->cancel_remain_on_channel)
8263                 return -EOPNOTSUPP;
8264
8265         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8266
8267         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
8268 }
8269
8270 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
8271                            u8 *rates, u8 rates_len)
8272 {
8273         u8 i;
8274         u32 mask = 0;
8275
8276         for (i = 0; i < rates_len; i++) {
8277                 int rate = (rates[i] & 0x7f) * 5;
8278                 int ridx;
8279                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
8280                         struct ieee80211_rate *srate =
8281                                 &sband->bitrates[ridx];
8282                         if (rate == srate->bitrate) {
8283                                 mask |= 1 << ridx;
8284                                 break;
8285                         }
8286                 }
8287                 if (ridx == sband->n_bitrates)
8288                         return 0; /* rate not found */
8289         }
8290
8291         return mask;
8292 }
8293
8294 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
8295                                u8 *rates, u8 rates_len,
8296                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
8297 {
8298         u8 i;
8299
8300         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
8301
8302         for (i = 0; i < rates_len; i++) {
8303                 int ridx, rbit;
8304
8305                 ridx = rates[i] / 8;
8306                 rbit = BIT(rates[i] % 8);
8307
8308                 /* check validity */
8309                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
8310                         return false;
8311
8312                 /* check availability */
8313                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
8314                         mcs[ridx] |= rbit;
8315                 else
8316                         return false;
8317         }
8318
8319         return true;
8320 }
8321
8322 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
8323 {
8324         u16 mcs_mask = 0;
8325
8326         switch (vht_mcs_map) {
8327         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
8328                 break;
8329         case IEEE80211_VHT_MCS_SUPPORT_0_7:
8330                 mcs_mask = 0x00FF;
8331                 break;
8332         case IEEE80211_VHT_MCS_SUPPORT_0_8:
8333                 mcs_mask = 0x01FF;
8334                 break;
8335         case IEEE80211_VHT_MCS_SUPPORT_0_9:
8336                 mcs_mask = 0x03FF;
8337                 break;
8338         default:
8339                 break;
8340         }
8341
8342         return mcs_mask;
8343 }
8344
8345 static void vht_build_mcs_mask(u16 vht_mcs_map,
8346                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
8347 {
8348         u8 nss;
8349
8350         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
8351                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
8352                 vht_mcs_map >>= 2;
8353         }
8354 }
8355
8356 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
8357                              struct nl80211_txrate_vht *txrate,
8358                              u16 mcs[NL80211_VHT_NSS_MAX])
8359 {
8360         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8361         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
8362         u8 i;
8363
8364         if (!sband->vht_cap.vht_supported)
8365                 return false;
8366
8367         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
8368
8369         /* Build vht_mcs_mask from VHT capabilities */
8370         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
8371
8372         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
8373                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
8374                         mcs[i] = txrate->mcs[i];
8375                 else
8376                         return false;
8377         }
8378
8379         return true;
8380 }
8381
8382 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
8383         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
8384                                     .len = NL80211_MAX_SUPP_RATES },
8385         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
8386                                 .len = NL80211_MAX_SUPP_HT_RATES },
8387         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
8388         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
8389 };
8390
8391 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
8392                                        struct genl_info *info)
8393 {
8394         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
8395         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8396         struct cfg80211_bitrate_mask mask;
8397         int rem, i;
8398         struct net_device *dev = info->user_ptr[1];
8399         struct nlattr *tx_rates;
8400         struct ieee80211_supported_band *sband;
8401         u16 vht_tx_mcs_map;
8402
8403         if (!rdev->ops->set_bitrate_mask)
8404                 return -EOPNOTSUPP;
8405
8406         memset(&mask, 0, sizeof(mask));
8407         /* Default to all rates enabled */
8408         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
8409                 sband = rdev->wiphy.bands[i];
8410
8411                 if (!sband)
8412                         continue;
8413
8414                 mask.control[i].legacy = (1 << sband->n_bitrates) - 1;
8415                 memcpy(mask.control[i].ht_mcs,
8416                        sband->ht_cap.mcs.rx_mask,
8417                        sizeof(mask.control[i].ht_mcs));
8418
8419                 if (!sband->vht_cap.vht_supported)
8420                         continue;
8421
8422                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
8423                 vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
8424         }
8425
8426         /* if no rates are given set it back to the defaults */
8427         if (!info->attrs[NL80211_ATTR_TX_RATES])
8428                 goto out;
8429
8430         /*
8431          * The nested attribute uses enum nl80211_band as the index. This maps
8432          * directly to the enum ieee80211_band values used in cfg80211.
8433          */
8434         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
8435         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
8436                 enum ieee80211_band band = nla_type(tx_rates);
8437                 int err;
8438
8439                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
8440                         return -EINVAL;
8441                 sband = rdev->wiphy.bands[band];
8442                 if (sband == NULL)
8443                         return -EINVAL;
8444                 err = nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
8445                                 nla_len(tx_rates), nl80211_txattr_policy);
8446                 if (err)
8447                         return err;
8448                 if (tb[NL80211_TXRATE_LEGACY]) {
8449                         mask.control[band].legacy = rateset_to_mask(
8450                                 sband,
8451                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
8452                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
8453                         if ((mask.control[band].legacy == 0) &&
8454                             nla_len(tb[NL80211_TXRATE_LEGACY]))
8455                                 return -EINVAL;
8456                 }
8457                 if (tb[NL80211_TXRATE_HT]) {
8458                         if (!ht_rateset_to_mask(
8459                                         sband,
8460                                         nla_data(tb[NL80211_TXRATE_HT]),
8461                                         nla_len(tb[NL80211_TXRATE_HT]),
8462                                         mask.control[band].ht_mcs))
8463                                 return -EINVAL;
8464                 }
8465                 if (tb[NL80211_TXRATE_VHT]) {
8466                         if (!vht_set_mcs_mask(
8467                                         sband,
8468                                         nla_data(tb[NL80211_TXRATE_VHT]),
8469                                         mask.control[band].vht_mcs))
8470                                 return -EINVAL;
8471                 }
8472                 if (tb[NL80211_TXRATE_GI]) {
8473                         mask.control[band].gi =
8474                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
8475                         if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
8476                                 return -EINVAL;
8477                 }
8478
8479                 if (mask.control[band].legacy == 0) {
8480                         /* don't allow empty legacy rates if HT or VHT
8481                          * are not even supported.
8482                          */
8483                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
8484                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
8485                                 return -EINVAL;
8486
8487                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
8488                                 if (mask.control[band].ht_mcs[i])
8489                                         goto out;
8490
8491                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
8492                                 if (mask.control[band].vht_mcs[i])
8493                                         goto out;
8494
8495                         /* legacy and mcs rates may not be both empty */
8496                         return -EINVAL;
8497                 }
8498         }
8499
8500 out:
8501         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
8502 }
8503
8504 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
8505 {
8506         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8507         struct wireless_dev *wdev = info->user_ptr[1];
8508         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
8509
8510         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
8511                 return -EINVAL;
8512
8513         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
8514                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
8515
8516         switch (wdev->iftype) {
8517         case NL80211_IFTYPE_STATION:
8518         case NL80211_IFTYPE_ADHOC:
8519         case NL80211_IFTYPE_P2P_CLIENT:
8520         case NL80211_IFTYPE_AP:
8521         case NL80211_IFTYPE_AP_VLAN:
8522         case NL80211_IFTYPE_MESH_POINT:
8523         case NL80211_IFTYPE_P2P_GO:
8524         case NL80211_IFTYPE_P2P_DEVICE:
8525                 break;
8526         default:
8527                 return -EOPNOTSUPP;
8528         }
8529
8530         /* not much point in registering if we can't reply */
8531         if (!rdev->ops->mgmt_tx)
8532                 return -EOPNOTSUPP;
8533
8534         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
8535                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
8536                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
8537 }
8538
8539 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
8540 {
8541         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8542         struct wireless_dev *wdev = info->user_ptr[1];
8543         struct cfg80211_chan_def chandef;
8544         int err;
8545         void *hdr = NULL;
8546         u64 cookie;
8547         struct sk_buff *msg = NULL;
8548         struct cfg80211_mgmt_tx_params params = {
8549                 .dont_wait_for_ack =
8550                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
8551         };
8552
8553         if (!info->attrs[NL80211_ATTR_FRAME])
8554                 return -EINVAL;
8555
8556         if (!rdev->ops->mgmt_tx)
8557                 return -EOPNOTSUPP;
8558
8559         switch (wdev->iftype) {
8560         case NL80211_IFTYPE_P2P_DEVICE:
8561                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
8562                         return -EINVAL;
8563         case NL80211_IFTYPE_STATION:
8564         case NL80211_IFTYPE_ADHOC:
8565         case NL80211_IFTYPE_P2P_CLIENT:
8566         case NL80211_IFTYPE_AP:
8567         case NL80211_IFTYPE_AP_VLAN:
8568         case NL80211_IFTYPE_MESH_POINT:
8569         case NL80211_IFTYPE_P2P_GO:
8570                 break;
8571         default:
8572                 return -EOPNOTSUPP;
8573         }
8574
8575         if (info->attrs[NL80211_ATTR_DURATION]) {
8576                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8577                         return -EINVAL;
8578                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
8579
8580                 /*
8581                  * We should wait on the channel for at least a minimum amount
8582                  * of time (10ms) but no longer than the driver supports.
8583                  */
8584                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
8585                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
8586                         return -EINVAL;
8587
8588         }
8589
8590         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
8591
8592         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
8593                 return -EINVAL;
8594
8595         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
8596
8597         /* get the channel if any has been specified, otherwise pass NULL to
8598          * the driver. The latter will use the current one
8599          */
8600         chandef.chan = NULL;
8601         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8602                 err = nl80211_parse_chandef(rdev, info, &chandef);
8603                 if (err)
8604                         return err;
8605         }
8606
8607         if (!chandef.chan && params.offchan)
8608                 return -EINVAL;
8609
8610         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
8611         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
8612
8613         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
8614                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8615                 int i;
8616
8617                 if (len % sizeof(u16))
8618                         return -EINVAL;
8619
8620                 params.n_csa_offsets = len / sizeof(u16);
8621                 params.csa_offsets =
8622                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
8623
8624                 /* check that all the offsets fit the frame */
8625                 for (i = 0; i < params.n_csa_offsets; i++) {
8626                         if (params.csa_offsets[i] >= params.len)
8627                                 return -EINVAL;
8628                 }
8629         }
8630
8631         if (!params.dont_wait_for_ack) {
8632                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8633                 if (!msg)
8634                         return -ENOMEM;
8635
8636                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8637                                      NL80211_CMD_FRAME);
8638                 if (!hdr) {
8639                         err = -ENOBUFS;
8640                         goto free_msg;
8641                 }
8642         }
8643
8644         params.chan = chandef.chan;
8645         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
8646         if (err)
8647                 goto free_msg;
8648
8649         if (msg) {
8650                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8651                         goto nla_put_failure;
8652
8653                 genlmsg_end(msg, hdr);
8654                 return genlmsg_reply(msg, info);
8655         }
8656
8657         return 0;
8658
8659  nla_put_failure:
8660         err = -ENOBUFS;
8661  free_msg:
8662         nlmsg_free(msg);
8663         return err;
8664 }
8665
8666 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
8667 {
8668         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8669         struct wireless_dev *wdev = info->user_ptr[1];
8670         u64 cookie;
8671
8672         if (!info->attrs[NL80211_ATTR_COOKIE])
8673                 return -EINVAL;
8674
8675         if (!rdev->ops->mgmt_tx_cancel_wait)
8676                 return -EOPNOTSUPP;
8677
8678         switch (wdev->iftype) {
8679         case NL80211_IFTYPE_STATION:
8680         case NL80211_IFTYPE_ADHOC:
8681         case NL80211_IFTYPE_P2P_CLIENT:
8682         case NL80211_IFTYPE_AP:
8683         case NL80211_IFTYPE_AP_VLAN:
8684         case NL80211_IFTYPE_P2P_GO:
8685         case NL80211_IFTYPE_P2P_DEVICE:
8686                 break;
8687         default:
8688                 return -EOPNOTSUPP;
8689         }
8690
8691         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
8692
8693         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
8694 }
8695
8696 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
8697 {
8698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8699         struct wireless_dev *wdev;
8700         struct net_device *dev = info->user_ptr[1];
8701         u8 ps_state;
8702         bool state;
8703         int err;
8704
8705         if (!info->attrs[NL80211_ATTR_PS_STATE])
8706                 return -EINVAL;
8707
8708         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
8709
8710         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
8711                 return -EINVAL;
8712
8713         wdev = dev->ieee80211_ptr;
8714
8715         if (!rdev->ops->set_power_mgmt)
8716                 return -EOPNOTSUPP;
8717
8718         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
8719
8720         if (state == wdev->ps)
8721                 return 0;
8722
8723         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
8724         if (!err)
8725                 wdev->ps = state;
8726         return err;
8727 }
8728
8729 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
8730 {
8731         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8732         enum nl80211_ps_state ps_state;
8733         struct wireless_dev *wdev;
8734         struct net_device *dev = info->user_ptr[1];
8735         struct sk_buff *msg;
8736         void *hdr;
8737         int err;
8738
8739         wdev = dev->ieee80211_ptr;
8740
8741         if (!rdev->ops->set_power_mgmt)
8742                 return -EOPNOTSUPP;
8743
8744         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8745         if (!msg)
8746                 return -ENOMEM;
8747
8748         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8749                              NL80211_CMD_GET_POWER_SAVE);
8750         if (!hdr) {
8751                 err = -ENOBUFS;
8752                 goto free_msg;
8753         }
8754
8755         if (wdev->ps)
8756                 ps_state = NL80211_PS_ENABLED;
8757         else
8758                 ps_state = NL80211_PS_DISABLED;
8759
8760         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
8761                 goto nla_put_failure;
8762
8763         genlmsg_end(msg, hdr);
8764         return genlmsg_reply(msg, info);
8765
8766  nla_put_failure:
8767         err = -ENOBUFS;
8768  free_msg:
8769         nlmsg_free(msg);
8770         return err;
8771 }
8772
8773 static const struct nla_policy
8774 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
8775         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
8776         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
8777         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
8778         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
8779         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
8780         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
8781 };
8782
8783 static int nl80211_set_cqm_txe(struct genl_info *info,
8784                                u32 rate, u32 pkts, u32 intvl)
8785 {
8786         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8787         struct net_device *dev = info->user_ptr[1];
8788         struct wireless_dev *wdev = dev->ieee80211_ptr;
8789
8790         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
8791                 return -EINVAL;
8792
8793         if (!rdev->ops->set_cqm_txe_config)
8794                 return -EOPNOTSUPP;
8795
8796         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8797             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8798                 return -EOPNOTSUPP;
8799
8800         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
8801 }
8802
8803 static int nl80211_set_cqm_rssi(struct genl_info *info,
8804                                 s32 threshold, u32 hysteresis)
8805 {
8806         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8807         struct net_device *dev = info->user_ptr[1];
8808         struct wireless_dev *wdev = dev->ieee80211_ptr;
8809
8810         if (threshold > 0)
8811                 return -EINVAL;
8812
8813         /* disabling - hysteresis should also be zero then */
8814         if (threshold == 0)
8815                 hysteresis = 0;
8816
8817         if (!rdev->ops->set_cqm_rssi_config)
8818                 return -EOPNOTSUPP;
8819
8820         if (wdev->iftype != NL80211_IFTYPE_STATION &&
8821             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
8822                 return -EOPNOTSUPP;
8823
8824         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
8825 }
8826
8827 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
8828 {
8829         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
8830         struct nlattr *cqm;
8831         int err;
8832
8833         cqm = info->attrs[NL80211_ATTR_CQM];
8834         if (!cqm)
8835                 return -EINVAL;
8836
8837         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
8838                                nl80211_attr_cqm_policy);
8839         if (err)
8840                 return err;
8841
8842         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
8843             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
8844                 s32 threshold = nla_get_s32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
8845                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
8846
8847                 return nl80211_set_cqm_rssi(info, threshold, hysteresis);
8848         }
8849
8850         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
8851             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
8852             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
8853                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
8854                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
8855                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
8856
8857                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
8858         }
8859
8860         return -EINVAL;
8861 }
8862
8863 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
8864 {
8865         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8866         struct net_device *dev = info->user_ptr[1];
8867         struct ocb_setup setup = {};
8868         int err;
8869
8870         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8871         if (err)
8872                 return err;
8873
8874         return cfg80211_join_ocb(rdev, dev, &setup);
8875 }
8876
8877 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
8878 {
8879         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8880         struct net_device *dev = info->user_ptr[1];
8881
8882         return cfg80211_leave_ocb(rdev, dev);
8883 }
8884
8885 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
8886 {
8887         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8888         struct net_device *dev = info->user_ptr[1];
8889         struct mesh_config cfg;
8890         struct mesh_setup setup;
8891         int err;
8892
8893         /* start with default */
8894         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
8895         memcpy(&setup, &default_mesh_setup, sizeof(setup));
8896
8897         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
8898                 /* and parse parameters if given */
8899                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
8900                 if (err)
8901                         return err;
8902         }
8903
8904         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
8905             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
8906                 return -EINVAL;
8907
8908         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
8909         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
8910
8911         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8912             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
8913                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8914                         return -EINVAL;
8915
8916         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
8917                 setup.beacon_interval =
8918                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8919                 if (setup.beacon_interval < 10 ||
8920                     setup.beacon_interval > 10000)
8921                         return -EINVAL;
8922         }
8923
8924         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
8925                 setup.dtim_period =
8926                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
8927                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
8928                         return -EINVAL;
8929         }
8930
8931         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
8932                 /* parse additional setup parameters if given */
8933                 err = nl80211_parse_mesh_setup(info, &setup);
8934                 if (err)
8935                         return err;
8936         }
8937
8938         if (setup.user_mpm)
8939                 cfg.auto_open_plinks = false;
8940
8941         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8942                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
8943                 if (err)
8944                         return err;
8945         } else {
8946                 /* cfg80211_join_mesh() will sort it out */
8947                 setup.chandef.chan = NULL;
8948         }
8949
8950         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8951                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8952                 int n_rates =
8953                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8954                 struct ieee80211_supported_band *sband;
8955
8956                 if (!setup.chandef.chan)
8957                         return -EINVAL;
8958
8959                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
8960
8961                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8962                                              &setup.basic_rates);
8963                 if (err)
8964                         return err;
8965         }
8966
8967         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
8968 }
8969
8970 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
8971 {
8972         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8973         struct net_device *dev = info->user_ptr[1];
8974
8975         return cfg80211_leave_mesh(rdev, dev);
8976 }
8977
8978 #ifdef CONFIG_PM
8979 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
8980                                         struct cfg80211_registered_device *rdev)
8981 {
8982         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
8983         struct nlattr *nl_pats, *nl_pat;
8984         int i, pat_len;
8985
8986         if (!wowlan->n_patterns)
8987                 return 0;
8988
8989         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
8990         if (!nl_pats)
8991                 return -ENOBUFS;
8992
8993         for (i = 0; i < wowlan->n_patterns; i++) {
8994                 nl_pat = nla_nest_start(msg, i + 1);
8995                 if (!nl_pat)
8996                         return -ENOBUFS;
8997                 pat_len = wowlan->patterns[i].pattern_len;
8998                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
8999                             wowlan->patterns[i].mask) ||
9000                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9001                             wowlan->patterns[i].pattern) ||
9002                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9003                                 wowlan->patterns[i].pkt_offset))
9004                         return -ENOBUFS;
9005                 nla_nest_end(msg, nl_pat);
9006         }
9007         nla_nest_end(msg, nl_pats);
9008
9009         return 0;
9010 }
9011
9012 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
9013                                    struct cfg80211_wowlan_tcp *tcp)
9014 {
9015         struct nlattr *nl_tcp;
9016
9017         if (!tcp)
9018                 return 0;
9019
9020         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
9021         if (!nl_tcp)
9022                 return -ENOBUFS;
9023
9024         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
9025             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
9026             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
9027             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
9028             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
9029             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
9030                     tcp->payload_len, tcp->payload) ||
9031             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
9032                         tcp->data_interval) ||
9033             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
9034                     tcp->wake_len, tcp->wake_data) ||
9035             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
9036                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
9037                 return -ENOBUFS;
9038
9039         if (tcp->payload_seq.len &&
9040             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
9041                     sizeof(tcp->payload_seq), &tcp->payload_seq))
9042                 return -ENOBUFS;
9043
9044         if (tcp->payload_tok.len &&
9045             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
9046                     sizeof(tcp->payload_tok) + tcp->tokens_size,
9047                     &tcp->payload_tok))
9048                 return -ENOBUFS;
9049
9050         nla_nest_end(msg, nl_tcp);
9051
9052         return 0;
9053 }
9054
9055 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
9056                                   struct cfg80211_sched_scan_request *req)
9057 {
9058         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
9059         int i;
9060
9061         if (!req)
9062                 return 0;
9063
9064         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
9065         if (!nd)
9066                 return -ENOBUFS;
9067
9068         if (req->n_scan_plans == 1 &&
9069             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
9070                         req->scan_plans[0].interval * 1000))
9071                 return -ENOBUFS;
9072
9073         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
9074                 return -ENOBUFS;
9075
9076         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
9077         if (!freqs)
9078                 return -ENOBUFS;
9079
9080         for (i = 0; i < req->n_channels; i++)
9081                 nla_put_u32(msg, i, req->channels[i]->center_freq);
9082
9083         nla_nest_end(msg, freqs);
9084
9085         if (req->n_match_sets) {
9086                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
9087                 for (i = 0; i < req->n_match_sets; i++) {
9088                         match = nla_nest_start(msg, i);
9089                         nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
9090                                 req->match_sets[i].ssid.ssid_len,
9091                                 req->match_sets[i].ssid.ssid);
9092                         nla_nest_end(msg, match);
9093                 }
9094                 nla_nest_end(msg, matches);
9095         }
9096
9097         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
9098         if (!scan_plans)
9099                 return -ENOBUFS;
9100
9101         for (i = 0; i < req->n_scan_plans; i++) {
9102                 scan_plan = nla_nest_start(msg, i + 1);
9103                 if (!scan_plan ||
9104                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
9105                                 req->scan_plans[i].interval) ||
9106                     (req->scan_plans[i].iterations &&
9107                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
9108                                  req->scan_plans[i].iterations)))
9109                         return -ENOBUFS;
9110                 nla_nest_end(msg, scan_plan);
9111         }
9112         nla_nest_end(msg, scan_plans);
9113
9114         nla_nest_end(msg, nd);
9115
9116         return 0;
9117 }
9118
9119 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
9120 {
9121         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9122         struct sk_buff *msg;
9123         void *hdr;
9124         u32 size = NLMSG_DEFAULT_SIZE;
9125
9126         if (!rdev->wiphy.wowlan)
9127                 return -EOPNOTSUPP;
9128
9129         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
9130                 /* adjust size to have room for all the data */
9131                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
9132                         rdev->wiphy.wowlan_config->tcp->payload_len +
9133                         rdev->wiphy.wowlan_config->tcp->wake_len +
9134                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
9135         }
9136
9137         msg = nlmsg_new(size, GFP_KERNEL);
9138         if (!msg)
9139                 return -ENOMEM;
9140
9141         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9142                              NL80211_CMD_GET_WOWLAN);
9143         if (!hdr)
9144                 goto nla_put_failure;
9145
9146         if (rdev->wiphy.wowlan_config) {
9147                 struct nlattr *nl_wowlan;
9148
9149                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9150                 if (!nl_wowlan)
9151                         goto nla_put_failure;
9152
9153                 if ((rdev->wiphy.wowlan_config->any &&
9154                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
9155                     (rdev->wiphy.wowlan_config->disconnect &&
9156                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
9157                     (rdev->wiphy.wowlan_config->magic_pkt &&
9158                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
9159                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
9160                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
9161                     (rdev->wiphy.wowlan_config->eap_identity_req &&
9162                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
9163                     (rdev->wiphy.wowlan_config->four_way_handshake &&
9164                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
9165                     (rdev->wiphy.wowlan_config->rfkill_release &&
9166                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
9167                         goto nla_put_failure;
9168
9169                 if (nl80211_send_wowlan_patterns(msg, rdev))
9170                         goto nla_put_failure;
9171
9172                 if (nl80211_send_wowlan_tcp(msg,
9173                                             rdev->wiphy.wowlan_config->tcp))
9174                         goto nla_put_failure;
9175
9176                 if (nl80211_send_wowlan_nd(
9177                             msg,
9178                             rdev->wiphy.wowlan_config->nd_config))
9179                         goto nla_put_failure;
9180
9181                 nla_nest_end(msg, nl_wowlan);
9182         }
9183
9184         genlmsg_end(msg, hdr);
9185         return genlmsg_reply(msg, info);
9186
9187 nla_put_failure:
9188         nlmsg_free(msg);
9189         return -ENOBUFS;
9190 }
9191
9192 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
9193                                     struct nlattr *attr,
9194                                     struct cfg80211_wowlan *trig)
9195 {
9196         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
9197         struct cfg80211_wowlan_tcp *cfg;
9198         struct nl80211_wowlan_tcp_data_token *tok = NULL;
9199         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
9200         u32 size;
9201         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
9202         int err, port;
9203
9204         if (!rdev->wiphy.wowlan->tcp)
9205                 return -EINVAL;
9206
9207         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
9208                         nla_data(attr), nla_len(attr),
9209                         nl80211_wowlan_tcp_policy);
9210         if (err)
9211                 return err;
9212
9213         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
9214             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
9215             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
9216             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
9217             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
9218             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
9219             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
9220             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
9221                 return -EINVAL;
9222
9223         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
9224         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
9225                 return -EINVAL;
9226
9227         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
9228                         rdev->wiphy.wowlan->tcp->data_interval_max ||
9229             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
9230                 return -EINVAL;
9231
9232         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
9233         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
9234                 return -EINVAL;
9235
9236         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
9237         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
9238                 return -EINVAL;
9239
9240         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
9241                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9242
9243                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
9244                 tokens_size = tokln - sizeof(*tok);
9245
9246                 if (!tok->len || tokens_size % tok->len)
9247                         return -EINVAL;
9248                 if (!rdev->wiphy.wowlan->tcp->tok)
9249                         return -EINVAL;
9250                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
9251                         return -EINVAL;
9252                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
9253                         return -EINVAL;
9254                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
9255                         return -EINVAL;
9256                 if (tok->offset + tok->len > data_size)
9257                         return -EINVAL;
9258         }
9259
9260         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
9261                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
9262                 if (!rdev->wiphy.wowlan->tcp->seq)
9263                         return -EINVAL;
9264                 if (seq->len == 0 || seq->len > 4)
9265                         return -EINVAL;
9266                 if (seq->len + seq->offset > data_size)
9267                         return -EINVAL;
9268         }
9269
9270         size = sizeof(*cfg);
9271         size += data_size;
9272         size += wake_size + wake_mask_size;
9273         size += tokens_size;
9274
9275         cfg = kzalloc(size, GFP_KERNEL);
9276         if (!cfg)
9277                 return -ENOMEM;
9278         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
9279         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
9280         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
9281                ETH_ALEN);
9282         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
9283                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
9284         else
9285                 port = 0;
9286 #ifdef CONFIG_INET
9287         /* allocate a socket and port for it and use it */
9288         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
9289                             IPPROTO_TCP, &cfg->sock, 1);
9290         if (err) {
9291                 kfree(cfg);
9292                 return err;
9293         }
9294         if (inet_csk_get_port(cfg->sock->sk, port)) {
9295                 sock_release(cfg->sock);
9296                 kfree(cfg);
9297                 return -EADDRINUSE;
9298         }
9299         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
9300 #else
9301         if (!port) {
9302                 kfree(cfg);
9303                 return -EINVAL;
9304         }
9305         cfg->src_port = port;
9306 #endif
9307
9308         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
9309         cfg->payload_len = data_size;
9310         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
9311         memcpy((void *)cfg->payload,
9312                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
9313                data_size);
9314         if (seq)
9315                 cfg->payload_seq = *seq;
9316         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
9317         cfg->wake_len = wake_size;
9318         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
9319         memcpy((void *)cfg->wake_data,
9320                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
9321                wake_size);
9322         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
9323                          data_size + wake_size;
9324         memcpy((void *)cfg->wake_mask,
9325                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
9326                wake_mask_size);
9327         if (tok) {
9328                 cfg->tokens_size = tokens_size;
9329                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
9330         }
9331
9332         trig->tcp = cfg;
9333
9334         return 0;
9335 }
9336
9337 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
9338                                    const struct wiphy_wowlan_support *wowlan,
9339                                    struct nlattr *attr,
9340                                    struct cfg80211_wowlan *trig)
9341 {
9342         struct nlattr **tb;
9343         int err;
9344
9345         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
9346         if (!tb)
9347                 return -ENOMEM;
9348
9349         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
9350                 err = -EOPNOTSUPP;
9351                 goto out;
9352         }
9353
9354         err = nla_parse(tb, NL80211_ATTR_MAX,
9355                         nla_data(attr), nla_len(attr),
9356                         nl80211_policy);
9357         if (err)
9358                 goto out;
9359
9360         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb);
9361         err = PTR_ERR_OR_ZERO(trig->nd_config);
9362         if (err)
9363                 trig->nd_config = NULL;
9364
9365 out:
9366         kfree(tb);
9367         return err;
9368 }
9369
9370 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
9371 {
9372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9373         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
9374         struct cfg80211_wowlan new_triggers = {};
9375         struct cfg80211_wowlan *ntrig;
9376         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
9377         int err, i;
9378         bool prev_enabled = rdev->wiphy.wowlan_config;
9379         bool regular = false;
9380
9381         if (!wowlan)
9382                 return -EOPNOTSUPP;
9383
9384         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
9385                 cfg80211_rdev_free_wowlan(rdev);
9386                 rdev->wiphy.wowlan_config = NULL;
9387                 goto set_wakeup;
9388         }
9389
9390         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
9391                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9392                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
9393                         nl80211_wowlan_policy);
9394         if (err)
9395                 return err;
9396
9397         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
9398                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
9399                         return -EINVAL;
9400                 new_triggers.any = true;
9401         }
9402
9403         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
9404                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
9405                         return -EINVAL;
9406                 new_triggers.disconnect = true;
9407                 regular = true;
9408         }
9409
9410         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
9411                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
9412                         return -EINVAL;
9413                 new_triggers.magic_pkt = true;
9414                 regular = true;
9415         }
9416
9417         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
9418                 return -EINVAL;
9419
9420         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
9421                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
9422                         return -EINVAL;
9423                 new_triggers.gtk_rekey_failure = true;
9424                 regular = true;
9425         }
9426
9427         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
9428                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
9429                         return -EINVAL;
9430                 new_triggers.eap_identity_req = true;
9431                 regular = true;
9432         }
9433
9434         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
9435                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
9436                         return -EINVAL;
9437                 new_triggers.four_way_handshake = true;
9438                 regular = true;
9439         }
9440
9441         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
9442                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
9443                         return -EINVAL;
9444                 new_triggers.rfkill_release = true;
9445                 regular = true;
9446         }
9447
9448         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
9449                 struct nlattr *pat;
9450                 int n_patterns = 0;
9451                 int rem, pat_len, mask_len, pkt_offset;
9452                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9453
9454                 regular = true;
9455
9456                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9457                                     rem)
9458                         n_patterns++;
9459                 if (n_patterns > wowlan->n_patterns)
9460                         return -EINVAL;
9461
9462                 new_triggers.patterns = kcalloc(n_patterns,
9463                                                 sizeof(new_triggers.patterns[0]),
9464                                                 GFP_KERNEL);
9465                 if (!new_triggers.patterns)
9466                         return -ENOMEM;
9467
9468                 new_triggers.n_patterns = n_patterns;
9469                 i = 0;
9470
9471                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
9472                                     rem) {
9473                         u8 *mask_pat;
9474
9475                         nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9476                                   nla_len(pat), nl80211_packet_pattern_policy);
9477                         err = -EINVAL;
9478                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
9479                             !pat_tb[NL80211_PKTPAT_PATTERN])
9480                                 goto error;
9481                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9482                         mask_len = DIV_ROUND_UP(pat_len, 8);
9483                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9484                                 goto error;
9485                         if (pat_len > wowlan->pattern_max_len ||
9486                             pat_len < wowlan->pattern_min_len)
9487                                 goto error;
9488
9489                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
9490                                 pkt_offset = 0;
9491                         else
9492                                 pkt_offset = nla_get_u32(
9493                                         pat_tb[NL80211_PKTPAT_OFFSET]);
9494                         if (pkt_offset > wowlan->max_pkt_offset)
9495                                 goto error;
9496                         new_triggers.patterns[i].pkt_offset = pkt_offset;
9497
9498                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9499                         if (!mask_pat) {
9500                                 err = -ENOMEM;
9501                                 goto error;
9502                         }
9503                         new_triggers.patterns[i].mask = mask_pat;
9504                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9505                                mask_len);
9506                         mask_pat += mask_len;
9507                         new_triggers.patterns[i].pattern = mask_pat;
9508                         new_triggers.patterns[i].pattern_len = pat_len;
9509                         memcpy(mask_pat,
9510                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9511                                pat_len);
9512                         i++;
9513                 }
9514         }
9515
9516         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
9517                 regular = true;
9518                 err = nl80211_parse_wowlan_tcp(
9519                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
9520                         &new_triggers);
9521                 if (err)
9522                         goto error;
9523         }
9524
9525         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
9526                 regular = true;
9527                 err = nl80211_parse_wowlan_nd(
9528                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
9529                         &new_triggers);
9530                 if (err)
9531                         goto error;
9532         }
9533
9534         /* The 'any' trigger means the device continues operating more or less
9535          * as in its normal operation mode and wakes up the host on most of the
9536          * normal interrupts (like packet RX, ...)
9537          * It therefore makes little sense to combine with the more constrained
9538          * wakeup trigger modes.
9539          */
9540         if (new_triggers.any && regular) {
9541                 err = -EINVAL;
9542                 goto error;
9543         }
9544
9545         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
9546         if (!ntrig) {
9547                 err = -ENOMEM;
9548                 goto error;
9549         }
9550         cfg80211_rdev_free_wowlan(rdev);
9551         rdev->wiphy.wowlan_config = ntrig;
9552
9553  set_wakeup:
9554         if (rdev->ops->set_wakeup &&
9555             prev_enabled != !!rdev->wiphy.wowlan_config)
9556                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
9557
9558         return 0;
9559  error:
9560         for (i = 0; i < new_triggers.n_patterns; i++)
9561                 kfree(new_triggers.patterns[i].mask);
9562         kfree(new_triggers.patterns);
9563         if (new_triggers.tcp && new_triggers.tcp->sock)
9564                 sock_release(new_triggers.tcp->sock);
9565         kfree(new_triggers.tcp);
9566         kfree(new_triggers.nd_config);
9567         return err;
9568 }
9569 #endif
9570
9571 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
9572                                        struct cfg80211_registered_device *rdev)
9573 {
9574         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
9575         int i, j, pat_len;
9576         struct cfg80211_coalesce_rules *rule;
9577
9578         if (!rdev->coalesce->n_rules)
9579                 return 0;
9580
9581         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
9582         if (!nl_rules)
9583                 return -ENOBUFS;
9584
9585         for (i = 0; i < rdev->coalesce->n_rules; i++) {
9586                 nl_rule = nla_nest_start(msg, i + 1);
9587                 if (!nl_rule)
9588                         return -ENOBUFS;
9589
9590                 rule = &rdev->coalesce->rules[i];
9591                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
9592                                 rule->delay))
9593                         return -ENOBUFS;
9594
9595                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
9596                                 rule->condition))
9597                         return -ENOBUFS;
9598
9599                 nl_pats = nla_nest_start(msg,
9600                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
9601                 if (!nl_pats)
9602                         return -ENOBUFS;
9603
9604                 for (j = 0; j < rule->n_patterns; j++) {
9605                         nl_pat = nla_nest_start(msg, j + 1);
9606                         if (!nl_pat)
9607                                 return -ENOBUFS;
9608                         pat_len = rule->patterns[j].pattern_len;
9609                         if (nla_put(msg, NL80211_PKTPAT_MASK,
9610                                     DIV_ROUND_UP(pat_len, 8),
9611                                     rule->patterns[j].mask) ||
9612                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9613                                     rule->patterns[j].pattern) ||
9614                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
9615                                         rule->patterns[j].pkt_offset))
9616                                 return -ENOBUFS;
9617                         nla_nest_end(msg, nl_pat);
9618                 }
9619                 nla_nest_end(msg, nl_pats);
9620                 nla_nest_end(msg, nl_rule);
9621         }
9622         nla_nest_end(msg, nl_rules);
9623
9624         return 0;
9625 }
9626
9627 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
9628 {
9629         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9630         struct sk_buff *msg;
9631         void *hdr;
9632
9633         if (!rdev->wiphy.coalesce)
9634                 return -EOPNOTSUPP;
9635
9636         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9637         if (!msg)
9638                 return -ENOMEM;
9639
9640         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9641                              NL80211_CMD_GET_COALESCE);
9642         if (!hdr)
9643                 goto nla_put_failure;
9644
9645         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
9646                 goto nla_put_failure;
9647
9648         genlmsg_end(msg, hdr);
9649         return genlmsg_reply(msg, info);
9650
9651 nla_put_failure:
9652         nlmsg_free(msg);
9653         return -ENOBUFS;
9654 }
9655
9656 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
9657 {
9658         struct cfg80211_coalesce *coalesce = rdev->coalesce;
9659         int i, j;
9660         struct cfg80211_coalesce_rules *rule;
9661
9662         if (!coalesce)
9663                 return;
9664
9665         for (i = 0; i < coalesce->n_rules; i++) {
9666                 rule = &coalesce->rules[i];
9667                 for (j = 0; j < rule->n_patterns; j++)
9668                         kfree(rule->patterns[j].mask);
9669                 kfree(rule->patterns);
9670         }
9671         kfree(coalesce->rules);
9672         kfree(coalesce);
9673         rdev->coalesce = NULL;
9674 }
9675
9676 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
9677                                        struct nlattr *rule,
9678                                        struct cfg80211_coalesce_rules *new_rule)
9679 {
9680         int err, i;
9681         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9682         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
9683         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
9684         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
9685
9686         err = nla_parse(tb, NL80211_ATTR_COALESCE_RULE_MAX, nla_data(rule),
9687                         nla_len(rule), nl80211_coalesce_policy);
9688         if (err)
9689                 return err;
9690
9691         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
9692                 new_rule->delay =
9693                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
9694         if (new_rule->delay > coalesce->max_delay)
9695                 return -EINVAL;
9696
9697         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
9698                 new_rule->condition =
9699                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
9700         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
9701             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
9702                 return -EINVAL;
9703
9704         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
9705                 return -EINVAL;
9706
9707         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9708                             rem)
9709                 n_patterns++;
9710         if (n_patterns > coalesce->n_patterns)
9711                 return -EINVAL;
9712
9713         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
9714                                      GFP_KERNEL);
9715         if (!new_rule->patterns)
9716                 return -ENOMEM;
9717
9718         new_rule->n_patterns = n_patterns;
9719         i = 0;
9720
9721         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
9722                             rem) {
9723                 u8 *mask_pat;
9724
9725                 nla_parse(pat_tb, MAX_NL80211_PKTPAT, nla_data(pat),
9726                           nla_len(pat), nl80211_packet_pattern_policy);
9727                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
9728                     !pat_tb[NL80211_PKTPAT_PATTERN])
9729                         return -EINVAL;
9730                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
9731                 mask_len = DIV_ROUND_UP(pat_len, 8);
9732                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
9733                         return -EINVAL;
9734                 if (pat_len > coalesce->pattern_max_len ||
9735                     pat_len < coalesce->pattern_min_len)
9736                         return -EINVAL;
9737
9738                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
9739                         pkt_offset = 0;
9740                 else
9741                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
9742                 if (pkt_offset > coalesce->max_pkt_offset)
9743                         return -EINVAL;
9744                 new_rule->patterns[i].pkt_offset = pkt_offset;
9745
9746                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
9747                 if (!mask_pat)
9748                         return -ENOMEM;
9749
9750                 new_rule->patterns[i].mask = mask_pat;
9751                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
9752                        mask_len);
9753
9754                 mask_pat += mask_len;
9755                 new_rule->patterns[i].pattern = mask_pat;
9756                 new_rule->patterns[i].pattern_len = pat_len;
9757                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
9758                        pat_len);
9759                 i++;
9760         }
9761
9762         return 0;
9763 }
9764
9765 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
9766 {
9767         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9768         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
9769         struct cfg80211_coalesce new_coalesce = {};
9770         struct cfg80211_coalesce *n_coalesce;
9771         int err, rem_rule, n_rules = 0, i, j;
9772         struct nlattr *rule;
9773         struct cfg80211_coalesce_rules *tmp_rule;
9774
9775         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
9776                 return -EOPNOTSUPP;
9777
9778         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
9779                 cfg80211_rdev_free_coalesce(rdev);
9780                 rdev->ops->set_coalesce(&rdev->wiphy, NULL);
9781                 return 0;
9782         }
9783
9784         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9785                             rem_rule)
9786                 n_rules++;
9787         if (n_rules > coalesce->n_rules)
9788                 return -EINVAL;
9789
9790         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
9791                                      GFP_KERNEL);
9792         if (!new_coalesce.rules)
9793                 return -ENOMEM;
9794
9795         new_coalesce.n_rules = n_rules;
9796         i = 0;
9797
9798         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
9799                             rem_rule) {
9800                 err = nl80211_parse_coalesce_rule(rdev, rule,
9801                                                   &new_coalesce.rules[i]);
9802                 if (err)
9803                         goto error;
9804
9805                 i++;
9806         }
9807
9808         err = rdev->ops->set_coalesce(&rdev->wiphy, &new_coalesce);
9809         if (err)
9810                 goto error;
9811
9812         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
9813         if (!n_coalesce) {
9814                 err = -ENOMEM;
9815                 goto error;
9816         }
9817         cfg80211_rdev_free_coalesce(rdev);
9818         rdev->coalesce = n_coalesce;
9819
9820         return 0;
9821 error:
9822         for (i = 0; i < new_coalesce.n_rules; i++) {
9823                 tmp_rule = &new_coalesce.rules[i];
9824                 for (j = 0; j < tmp_rule->n_patterns; j++)
9825                         kfree(tmp_rule->patterns[j].mask);
9826                 kfree(tmp_rule->patterns);
9827         }
9828         kfree(new_coalesce.rules);
9829
9830         return err;
9831 }
9832
9833 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
9834 {
9835         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9836         struct net_device *dev = info->user_ptr[1];
9837         struct wireless_dev *wdev = dev->ieee80211_ptr;
9838         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
9839         struct cfg80211_gtk_rekey_data rekey_data = {};
9840         int err;
9841
9842         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
9843                 return -EINVAL;
9844
9845         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
9846                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
9847                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
9848                         nl80211_rekey_policy);
9849         if (err)
9850                 return err;
9851
9852         if (!tb[NL80211_REKEY_DATA_REPLAY_CTR] || !tb[NL80211_REKEY_DATA_KEK] ||
9853             !tb[NL80211_REKEY_DATA_KCK])
9854                 return -EINVAL;
9855         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
9856                 return -ERANGE;
9857         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
9858                 return -ERANGE;
9859         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
9860                 return -ERANGE;
9861
9862         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
9863         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
9864         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
9865
9866         wdev_lock(wdev);
9867         if (!wdev->current_bss) {
9868                 err = -ENOTCONN;
9869                 goto out;
9870         }
9871
9872         if (!rdev->ops->set_rekey_data) {
9873                 err = -EOPNOTSUPP;
9874                 goto out;
9875         }
9876
9877         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
9878  out:
9879         wdev_unlock(wdev);
9880         return err;
9881 }
9882
9883 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
9884                                              struct genl_info *info)
9885 {
9886         struct net_device *dev = info->user_ptr[1];
9887         struct wireless_dev *wdev = dev->ieee80211_ptr;
9888
9889         if (wdev->iftype != NL80211_IFTYPE_AP &&
9890             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9891                 return -EINVAL;
9892
9893         if (wdev->ap_unexpected_nlportid)
9894                 return -EBUSY;
9895
9896         wdev->ap_unexpected_nlportid = info->snd_portid;
9897         return 0;
9898 }
9899
9900 static int nl80211_probe_client(struct sk_buff *skb,
9901                                 struct genl_info *info)
9902 {
9903         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9904         struct net_device *dev = info->user_ptr[1];
9905         struct wireless_dev *wdev = dev->ieee80211_ptr;
9906         struct sk_buff *msg;
9907         void *hdr;
9908         const u8 *addr;
9909         u64 cookie;
9910         int err;
9911
9912         if (wdev->iftype != NL80211_IFTYPE_AP &&
9913             wdev->iftype != NL80211_IFTYPE_P2P_GO)
9914                 return -EOPNOTSUPP;
9915
9916         if (!info->attrs[NL80211_ATTR_MAC])
9917                 return -EINVAL;
9918
9919         if (!rdev->ops->probe_client)
9920                 return -EOPNOTSUPP;
9921
9922         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9923         if (!msg)
9924                 return -ENOMEM;
9925
9926         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9927                              NL80211_CMD_PROBE_CLIENT);
9928         if (!hdr) {
9929                 err = -ENOBUFS;
9930                 goto free_msg;
9931         }
9932
9933         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
9934
9935         err = rdev_probe_client(rdev, dev, addr, &cookie);
9936         if (err)
9937                 goto free_msg;
9938
9939         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9940                 goto nla_put_failure;
9941
9942         genlmsg_end(msg, hdr);
9943
9944         return genlmsg_reply(msg, info);
9945
9946  nla_put_failure:
9947         err = -ENOBUFS;
9948  free_msg:
9949         nlmsg_free(msg);
9950         return err;
9951 }
9952
9953 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
9954 {
9955         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9956         struct cfg80211_beacon_registration *reg, *nreg;
9957         int rv;
9958
9959         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
9960                 return -EOPNOTSUPP;
9961
9962         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
9963         if (!nreg)
9964                 return -ENOMEM;
9965
9966         /* First, check if already registered. */
9967         spin_lock_bh(&rdev->beacon_registrations_lock);
9968         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9969                 if (reg->nlportid == info->snd_portid) {
9970                         rv = -EALREADY;
9971                         goto out_err;
9972                 }
9973         }
9974         /* Add it to the list */
9975         nreg->nlportid = info->snd_portid;
9976         list_add(&nreg->list, &rdev->beacon_registrations);
9977
9978         spin_unlock_bh(&rdev->beacon_registrations_lock);
9979
9980         return 0;
9981 out_err:
9982         spin_unlock_bh(&rdev->beacon_registrations_lock);
9983         kfree(nreg);
9984         return rv;
9985 }
9986
9987 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
9988 {
9989         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9990         struct wireless_dev *wdev = info->user_ptr[1];
9991         int err;
9992
9993         if (!rdev->ops->start_p2p_device)
9994                 return -EOPNOTSUPP;
9995
9996         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
9997                 return -EOPNOTSUPP;
9998
9999         if (wdev->p2p_started)
10000                 return 0;
10001
10002         if (rfkill_blocked(rdev->rfkill))
10003                 return -ERFKILL;
10004
10005         err = rdev_start_p2p_device(rdev, wdev);
10006         if (err)
10007                 return err;
10008
10009         wdev->p2p_started = true;
10010         rdev->opencount++;
10011
10012         return 0;
10013 }
10014
10015 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
10016 {
10017         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10018         struct wireless_dev *wdev = info->user_ptr[1];
10019
10020         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
10021                 return -EOPNOTSUPP;
10022
10023         if (!rdev->ops->stop_p2p_device)
10024                 return -EOPNOTSUPP;
10025
10026         cfg80211_stop_p2p_device(rdev, wdev);
10027
10028         return 0;
10029 }
10030
10031 static int nl80211_get_protocol_features(struct sk_buff *skb,
10032                                          struct genl_info *info)
10033 {
10034         void *hdr;
10035         struct sk_buff *msg;
10036
10037         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10038         if (!msg)
10039                 return -ENOMEM;
10040
10041         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10042                              NL80211_CMD_GET_PROTOCOL_FEATURES);
10043         if (!hdr)
10044                 goto nla_put_failure;
10045
10046         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
10047                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
10048                 goto nla_put_failure;
10049
10050         genlmsg_end(msg, hdr);
10051         return genlmsg_reply(msg, info);
10052
10053  nla_put_failure:
10054         kfree_skb(msg);
10055         return -ENOBUFS;
10056 }
10057
10058 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
10059 {
10060         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10061         struct cfg80211_update_ft_ies_params ft_params;
10062         struct net_device *dev = info->user_ptr[1];
10063
10064         if (!rdev->ops->update_ft_ies)
10065                 return -EOPNOTSUPP;
10066
10067         if (!info->attrs[NL80211_ATTR_MDID] ||
10068             !info->attrs[NL80211_ATTR_IE] ||
10069             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
10070                 return -EINVAL;
10071
10072         memset(&ft_params, 0, sizeof(ft_params));
10073         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
10074         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
10075         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
10076
10077         return rdev_update_ft_ies(rdev, dev, &ft_params);
10078 }
10079
10080 static int nl80211_crit_protocol_start(struct sk_buff *skb,
10081                                        struct genl_info *info)
10082 {
10083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10084         struct wireless_dev *wdev = info->user_ptr[1];
10085         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
10086         u16 duration;
10087         int ret;
10088
10089         if (!rdev->ops->crit_proto_start)
10090                 return -EOPNOTSUPP;
10091
10092         if (WARN_ON(!rdev->ops->crit_proto_stop))
10093                 return -EINVAL;
10094
10095         if (rdev->crit_proto_nlportid)
10096                 return -EBUSY;
10097
10098         /* determine protocol if provided */
10099         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
10100                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
10101
10102         if (proto >= NUM_NL80211_CRIT_PROTO)
10103                 return -EINVAL;
10104
10105         /* timeout must be provided */
10106         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
10107                 return -EINVAL;
10108
10109         duration =
10110                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
10111
10112         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
10113                 return -ERANGE;
10114
10115         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
10116         if (!ret)
10117                 rdev->crit_proto_nlportid = info->snd_portid;
10118
10119         return ret;
10120 }
10121
10122 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
10123                                       struct genl_info *info)
10124 {
10125         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10126         struct wireless_dev *wdev = info->user_ptr[1];
10127
10128         if (!rdev->ops->crit_proto_stop)
10129                 return -EOPNOTSUPP;
10130
10131         if (rdev->crit_proto_nlportid) {
10132                 rdev->crit_proto_nlportid = 0;
10133                 rdev_crit_proto_stop(rdev, wdev);
10134         }
10135         return 0;
10136 }
10137
10138 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
10139 {
10140         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10141         struct wireless_dev *wdev =
10142                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
10143         int i, err;
10144         u32 vid, subcmd;
10145
10146         if (!rdev->wiphy.vendor_commands)
10147                 return -EOPNOTSUPP;
10148
10149         if (IS_ERR(wdev)) {
10150                 err = PTR_ERR(wdev);
10151                 if (err != -EINVAL)
10152                         return err;
10153                 wdev = NULL;
10154         } else if (wdev->wiphy != &rdev->wiphy) {
10155                 return -EINVAL;
10156         }
10157
10158         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
10159             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
10160                 return -EINVAL;
10161
10162         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
10163         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
10164         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
10165                 const struct wiphy_vendor_command *vcmd;
10166                 void *data = NULL;
10167                 int len = 0;
10168
10169                 vcmd = &rdev->wiphy.vendor_commands[i];
10170
10171                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10172                         continue;
10173
10174                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10175                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10176                         if (!wdev)
10177                                 return -EINVAL;
10178                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10179                             !wdev->netdev)
10180                                 return -EINVAL;
10181
10182                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10183                                 if (wdev->netdev &&
10184                                     !netif_running(wdev->netdev))
10185                                         return -ENETDOWN;
10186                                 if (!wdev->netdev && !wdev->p2p_started)
10187                                         return -ENETDOWN;
10188                         }
10189                 } else {
10190                         wdev = NULL;
10191                 }
10192
10193                 if (!vcmd->doit)
10194                         return -EOPNOTSUPP;
10195
10196                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
10197                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10198                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
10199                 }
10200
10201                 rdev->cur_cmd_info = info;
10202                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
10203                                                           data, len);
10204                 rdev->cur_cmd_info = NULL;
10205                 return err;
10206         }
10207
10208         return -EOPNOTSUPP;
10209 }
10210
10211 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
10212                                        struct netlink_callback *cb,
10213                                        struct cfg80211_registered_device **rdev,
10214                                        struct wireless_dev **wdev)
10215 {
10216         u32 vid, subcmd;
10217         unsigned int i;
10218         int vcmd_idx = -1;
10219         int err;
10220         void *data = NULL;
10221         unsigned int data_len = 0;
10222
10223         if (cb->args[0]) {
10224                 /* subtract the 1 again here */
10225                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
10226                 struct wireless_dev *tmp;
10227
10228                 if (!wiphy)
10229                         return -ENODEV;
10230                 *rdev = wiphy_to_rdev(wiphy);
10231                 *wdev = NULL;
10232
10233                 if (cb->args[1]) {
10234                         list_for_each_entry(tmp, &(*rdev)->wdev_list, list) {
10235                                 if (tmp->identifier == cb->args[1] - 1) {
10236                                         *wdev = tmp;
10237                                         break;
10238                                 }
10239                         }
10240                 }
10241
10242                 /* keep rtnl locked in successful case */
10243                 return 0;
10244         }
10245
10246         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
10247                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
10248                           nl80211_policy);
10249         if (err)
10250                 return err;
10251
10252         if (!nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID] ||
10253             !nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD])
10254                 return -EINVAL;
10255
10256         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk),
10257                                            nl80211_fam.attrbuf);
10258         if (IS_ERR(*wdev))
10259                 *wdev = NULL;
10260
10261         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
10262                                            nl80211_fam.attrbuf);
10263         if (IS_ERR(*rdev))
10264                 return PTR_ERR(*rdev);
10265
10266         vid = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_ID]);
10267         subcmd = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
10268
10269         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
10270                 const struct wiphy_vendor_command *vcmd;
10271
10272                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
10273
10274                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
10275                         continue;
10276
10277                 if (!vcmd->dumpit)
10278                         return -EOPNOTSUPP;
10279
10280                 vcmd_idx = i;
10281                 break;
10282         }
10283
10284         if (vcmd_idx < 0)
10285                 return -EOPNOTSUPP;
10286
10287         if (nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]) {
10288                 data = nla_data(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10289                 data_len = nla_len(nl80211_fam.attrbuf[NL80211_ATTR_VENDOR_DATA]);
10290         }
10291
10292         /* 0 is the first index - add 1 to parse only once */
10293         cb->args[0] = (*rdev)->wiphy_idx + 1;
10294         /* add 1 to know if it was NULL */
10295         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
10296         cb->args[2] = vcmd_idx;
10297         cb->args[3] = (unsigned long)data;
10298         cb->args[4] = data_len;
10299
10300         /* keep rtnl locked in successful case */
10301         return 0;
10302 }
10303
10304 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
10305                                    struct netlink_callback *cb)
10306 {
10307         struct cfg80211_registered_device *rdev;
10308         struct wireless_dev *wdev;
10309         unsigned int vcmd_idx;
10310         const struct wiphy_vendor_command *vcmd;
10311         void *data;
10312         int data_len;
10313         int err;
10314         struct nlattr *vendor_data;
10315
10316         rtnl_lock();
10317         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
10318         if (err)
10319                 goto out;
10320
10321         vcmd_idx = cb->args[2];
10322         data = (void *)cb->args[3];
10323         data_len = cb->args[4];
10324         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
10325
10326         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
10327                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
10328                 if (!wdev) {
10329                         err = -EINVAL;
10330                         goto out;
10331                 }
10332                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
10333                     !wdev->netdev) {
10334                         err = -EINVAL;
10335                         goto out;
10336                 }
10337
10338                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
10339                         if (wdev->netdev &&
10340                             !netif_running(wdev->netdev)) {
10341                                 err = -ENETDOWN;
10342                                 goto out;
10343                         }
10344                         if (!wdev->netdev && !wdev->p2p_started) {
10345                                 err = -ENETDOWN;
10346                                 goto out;
10347                         }
10348                 }
10349         }
10350
10351         while (1) {
10352                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
10353                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
10354                                            NL80211_CMD_VENDOR);
10355                 if (!hdr)
10356                         break;
10357
10358                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10359                     (wdev && nla_put_u64(skb, NL80211_ATTR_WDEV,
10360                                          wdev_id(wdev)))) {
10361                         genlmsg_cancel(skb, hdr);
10362                         break;
10363                 }
10364
10365                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
10366                 if (!vendor_data) {
10367                         genlmsg_cancel(skb, hdr);
10368                         break;
10369                 }
10370
10371                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
10372                                    (unsigned long *)&cb->args[5]);
10373                 nla_nest_end(skb, vendor_data);
10374
10375                 if (err == -ENOBUFS || err == -ENOENT) {
10376                         genlmsg_cancel(skb, hdr);
10377                         break;
10378                 } else if (err) {
10379                         genlmsg_cancel(skb, hdr);
10380                         goto out;
10381                 }
10382
10383                 genlmsg_end(skb, hdr);
10384         }
10385
10386         err = skb->len;
10387  out:
10388         rtnl_unlock();
10389         return err;
10390 }
10391
10392 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
10393                                            enum nl80211_commands cmd,
10394                                            enum nl80211_attrs attr,
10395                                            int approxlen)
10396 {
10397         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
10398
10399         if (WARN_ON(!rdev->cur_cmd_info))
10400                 return NULL;
10401
10402         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
10403                                            rdev->cur_cmd_info->snd_portid,
10404                                            rdev->cur_cmd_info->snd_seq,
10405                                            cmd, attr, NULL, GFP_KERNEL);
10406 }
10407 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
10408
10409 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
10410 {
10411         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
10412         void *hdr = ((void **)skb->cb)[1];
10413         struct nlattr *data = ((void **)skb->cb)[2];
10414
10415         /* clear CB data for netlink core to own from now on */
10416         memset(skb->cb, 0, sizeof(skb->cb));
10417
10418         if (WARN_ON(!rdev->cur_cmd_info)) {
10419                 kfree_skb(skb);
10420                 return -EINVAL;
10421         }
10422
10423         nla_nest_end(skb, data);
10424         genlmsg_end(skb, hdr);
10425         return genlmsg_reply(skb, rdev->cur_cmd_info);
10426 }
10427 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
10428
10429
10430 static int nl80211_set_qos_map(struct sk_buff *skb,
10431                                struct genl_info *info)
10432 {
10433         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10434         struct cfg80211_qos_map *qos_map = NULL;
10435         struct net_device *dev = info->user_ptr[1];
10436         u8 *pos, len, num_des, des_len, des;
10437         int ret;
10438
10439         if (!rdev->ops->set_qos_map)
10440                 return -EOPNOTSUPP;
10441
10442         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
10443                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
10444                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
10445
10446                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
10447                     len > IEEE80211_QOS_MAP_LEN_MAX)
10448                         return -EINVAL;
10449
10450                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
10451                 if (!qos_map)
10452                         return -ENOMEM;
10453
10454                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
10455                 if (num_des) {
10456                         des_len = num_des *
10457                                 sizeof(struct cfg80211_dscp_exception);
10458                         memcpy(qos_map->dscp_exception, pos, des_len);
10459                         qos_map->num_des = num_des;
10460                         for (des = 0; des < num_des; des++) {
10461                                 if (qos_map->dscp_exception[des].up > 7) {
10462                                         kfree(qos_map);
10463                                         return -EINVAL;
10464                                 }
10465                         }
10466                         pos += des_len;
10467                 }
10468                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
10469         }
10470
10471         wdev_lock(dev->ieee80211_ptr);
10472         ret = nl80211_key_allowed(dev->ieee80211_ptr);
10473         if (!ret)
10474                 ret = rdev_set_qos_map(rdev, dev, qos_map);
10475         wdev_unlock(dev->ieee80211_ptr);
10476
10477         kfree(qos_map);
10478         return ret;
10479 }
10480
10481 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
10482 {
10483         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10484         struct net_device *dev = info->user_ptr[1];
10485         struct wireless_dev *wdev = dev->ieee80211_ptr;
10486         const u8 *peer;
10487         u8 tsid, up;
10488         u16 admitted_time = 0;
10489         int err;
10490
10491         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
10492                 return -EOPNOTSUPP;
10493
10494         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
10495             !info->attrs[NL80211_ATTR_USER_PRIO])
10496                 return -EINVAL;
10497
10498         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10499         if (tsid >= IEEE80211_NUM_TIDS)
10500                 return -EINVAL;
10501
10502         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
10503         if (up >= IEEE80211_NUM_UPS)
10504                 return -EINVAL;
10505
10506         /* WMM uses TIDs 0-7 even for TSPEC */
10507         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
10508                 /* TODO: handle 802.11 TSPEC/admission control
10509                  * need more attributes for that (e.g. BA session requirement);
10510                  * change the WMM adminssion test above to allow both then
10511                  */
10512                 return -EINVAL;
10513         }
10514
10515         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10516
10517         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
10518                 admitted_time =
10519                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
10520                 if (!admitted_time)
10521                         return -EINVAL;
10522         }
10523
10524         wdev_lock(wdev);
10525         switch (wdev->iftype) {
10526         case NL80211_IFTYPE_STATION:
10527         case NL80211_IFTYPE_P2P_CLIENT:
10528                 if (wdev->current_bss)
10529                         break;
10530                 err = -ENOTCONN;
10531                 goto out;
10532         default:
10533                 err = -EOPNOTSUPP;
10534                 goto out;
10535         }
10536
10537         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
10538
10539  out:
10540         wdev_unlock(wdev);
10541         return err;
10542 }
10543
10544 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
10545 {
10546         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10547         struct net_device *dev = info->user_ptr[1];
10548         struct wireless_dev *wdev = dev->ieee80211_ptr;
10549         const u8 *peer;
10550         u8 tsid;
10551         int err;
10552
10553         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
10554                 return -EINVAL;
10555
10556         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
10557         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
10558
10559         wdev_lock(wdev);
10560         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
10561         wdev_unlock(wdev);
10562
10563         return err;
10564 }
10565
10566 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
10567                                        struct genl_info *info)
10568 {
10569         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10570         struct net_device *dev = info->user_ptr[1];
10571         struct wireless_dev *wdev = dev->ieee80211_ptr;
10572         struct cfg80211_chan_def chandef = {};
10573         const u8 *addr;
10574         u8 oper_class;
10575         int err;
10576
10577         if (!rdev->ops->tdls_channel_switch ||
10578             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10579                 return -EOPNOTSUPP;
10580
10581         switch (dev->ieee80211_ptr->iftype) {
10582         case NL80211_IFTYPE_STATION:
10583         case NL80211_IFTYPE_P2P_CLIENT:
10584                 break;
10585         default:
10586                 return -EOPNOTSUPP;
10587         }
10588
10589         if (!info->attrs[NL80211_ATTR_MAC] ||
10590             !info->attrs[NL80211_ATTR_OPER_CLASS])
10591                 return -EINVAL;
10592
10593         err = nl80211_parse_chandef(rdev, info, &chandef);
10594         if (err)
10595                 return err;
10596
10597         /*
10598          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
10599          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
10600          * specification is not defined for them.
10601          */
10602         if (chandef.chan->band == IEEE80211_BAND_2GHZ &&
10603             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
10604             chandef.width != NL80211_CHAN_WIDTH_20)
10605                 return -EINVAL;
10606
10607         /* we will be active on the TDLS link */
10608         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
10609                                            wdev->iftype))
10610                 return -EINVAL;
10611
10612         /* don't allow switching to DFS channels */
10613         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
10614                 return -EINVAL;
10615
10616         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10617         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
10618
10619         wdev_lock(wdev);
10620         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
10621         wdev_unlock(wdev);
10622
10623         return err;
10624 }
10625
10626 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
10627                                               struct genl_info *info)
10628 {
10629         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10630         struct net_device *dev = info->user_ptr[1];
10631         struct wireless_dev *wdev = dev->ieee80211_ptr;
10632         const u8 *addr;
10633
10634         if (!rdev->ops->tdls_channel_switch ||
10635             !rdev->ops->tdls_cancel_channel_switch ||
10636             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
10637                 return -EOPNOTSUPP;
10638
10639         switch (dev->ieee80211_ptr->iftype) {
10640         case NL80211_IFTYPE_STATION:
10641         case NL80211_IFTYPE_P2P_CLIENT:
10642                 break;
10643         default:
10644                 return -EOPNOTSUPP;
10645         }
10646
10647         if (!info->attrs[NL80211_ATTR_MAC])
10648                 return -EINVAL;
10649
10650         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10651
10652         wdev_lock(wdev);
10653         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
10654         wdev_unlock(wdev);
10655
10656         return 0;
10657 }
10658
10659 #define NL80211_FLAG_NEED_WIPHY         0x01
10660 #define NL80211_FLAG_NEED_NETDEV        0x02
10661 #define NL80211_FLAG_NEED_RTNL          0x04
10662 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
10663 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
10664                                          NL80211_FLAG_CHECK_NETDEV_UP)
10665 #define NL80211_FLAG_NEED_WDEV          0x10
10666 /* If a netdev is associated, it must be UP, P2P must be started */
10667 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
10668                                          NL80211_FLAG_CHECK_NETDEV_UP)
10669 #define NL80211_FLAG_CLEAR_SKB          0x20
10670
10671 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
10672                             struct genl_info *info)
10673 {
10674         struct cfg80211_registered_device *rdev;
10675         struct wireless_dev *wdev;
10676         struct net_device *dev;
10677         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
10678
10679         if (rtnl)
10680                 rtnl_lock();
10681
10682         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
10683                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
10684                 if (IS_ERR(rdev)) {
10685                         if (rtnl)
10686                                 rtnl_unlock();
10687                         return PTR_ERR(rdev);
10688                 }
10689                 info->user_ptr[0] = rdev;
10690         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
10691                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10692                 ASSERT_RTNL();
10693
10694                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
10695                                                   info->attrs);
10696                 if (IS_ERR(wdev)) {
10697                         if (rtnl)
10698                                 rtnl_unlock();
10699                         return PTR_ERR(wdev);
10700                 }
10701
10702                 dev = wdev->netdev;
10703                 rdev = wiphy_to_rdev(wdev->wiphy);
10704
10705                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
10706                         if (!dev) {
10707                                 if (rtnl)
10708                                         rtnl_unlock();
10709                                 return -EINVAL;
10710                         }
10711
10712                         info->user_ptr[1] = dev;
10713                 } else {
10714                         info->user_ptr[1] = wdev;
10715                 }
10716
10717                 if (dev) {
10718                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
10719                             !netif_running(dev)) {
10720                                 if (rtnl)
10721                                         rtnl_unlock();
10722                                 return -ENETDOWN;
10723                         }
10724
10725                         dev_hold(dev);
10726                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
10727                         if (!wdev->p2p_started) {
10728                                 if (rtnl)
10729                                         rtnl_unlock();
10730                                 return -ENETDOWN;
10731                         }
10732                 }
10733
10734                 info->user_ptr[0] = rdev;
10735         }
10736
10737         return 0;
10738 }
10739
10740 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
10741                               struct genl_info *info)
10742 {
10743         if (info->user_ptr[1]) {
10744                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
10745                         struct wireless_dev *wdev = info->user_ptr[1];
10746
10747                         if (wdev->netdev)
10748                                 dev_put(wdev->netdev);
10749                 } else {
10750                         dev_put(info->user_ptr[1]);
10751                 }
10752         }
10753
10754         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
10755                 rtnl_unlock();
10756
10757         /* If needed, clear the netlink message payload from the SKB
10758          * as it might contain key data that shouldn't stick around on
10759          * the heap after the SKB is freed. The netlink message header
10760          * is still needed for further processing, so leave it intact.
10761          */
10762         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
10763                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
10764
10765                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
10766         }
10767 }
10768
10769 static const struct genl_ops nl80211_ops[] = {
10770         {
10771                 .cmd = NL80211_CMD_GET_WIPHY,
10772                 .doit = nl80211_get_wiphy,
10773                 .dumpit = nl80211_dump_wiphy,
10774                 .done = nl80211_dump_wiphy_done,
10775                 .policy = nl80211_policy,
10776                 /* can be retrieved by unprivileged users */
10777                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10778                                   NL80211_FLAG_NEED_RTNL,
10779         },
10780         {
10781                 .cmd = NL80211_CMD_SET_WIPHY,
10782                 .doit = nl80211_set_wiphy,
10783                 .policy = nl80211_policy,
10784                 .flags = GENL_ADMIN_PERM,
10785                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10786         },
10787         {
10788                 .cmd = NL80211_CMD_GET_INTERFACE,
10789                 .doit = nl80211_get_interface,
10790                 .dumpit = nl80211_dump_interface,
10791                 .policy = nl80211_policy,
10792                 /* can be retrieved by unprivileged users */
10793                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10794                                   NL80211_FLAG_NEED_RTNL,
10795         },
10796         {
10797                 .cmd = NL80211_CMD_SET_INTERFACE,
10798                 .doit = nl80211_set_interface,
10799                 .policy = nl80211_policy,
10800                 .flags = GENL_ADMIN_PERM,
10801                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10802                                   NL80211_FLAG_NEED_RTNL,
10803         },
10804         {
10805                 .cmd = NL80211_CMD_NEW_INTERFACE,
10806                 .doit = nl80211_new_interface,
10807                 .policy = nl80211_policy,
10808                 .flags = GENL_ADMIN_PERM,
10809                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
10810                                   NL80211_FLAG_NEED_RTNL,
10811         },
10812         {
10813                 .cmd = NL80211_CMD_DEL_INTERFACE,
10814                 .doit = nl80211_del_interface,
10815                 .policy = nl80211_policy,
10816                 .flags = GENL_ADMIN_PERM,
10817                 .internal_flags = NL80211_FLAG_NEED_WDEV |
10818                                   NL80211_FLAG_NEED_RTNL,
10819         },
10820         {
10821                 .cmd = NL80211_CMD_GET_KEY,
10822                 .doit = nl80211_get_key,
10823                 .policy = nl80211_policy,
10824                 .flags = GENL_ADMIN_PERM,
10825                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10826                                   NL80211_FLAG_NEED_RTNL,
10827         },
10828         {
10829                 .cmd = NL80211_CMD_SET_KEY,
10830                 .doit = nl80211_set_key,
10831                 .policy = nl80211_policy,
10832                 .flags = GENL_ADMIN_PERM,
10833                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10834                                   NL80211_FLAG_NEED_RTNL |
10835                                   NL80211_FLAG_CLEAR_SKB,
10836         },
10837         {
10838                 .cmd = NL80211_CMD_NEW_KEY,
10839                 .doit = nl80211_new_key,
10840                 .policy = nl80211_policy,
10841                 .flags = GENL_ADMIN_PERM,
10842                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10843                                   NL80211_FLAG_NEED_RTNL |
10844                                   NL80211_FLAG_CLEAR_SKB,
10845         },
10846         {
10847                 .cmd = NL80211_CMD_DEL_KEY,
10848                 .doit = nl80211_del_key,
10849                 .policy = nl80211_policy,
10850                 .flags = GENL_ADMIN_PERM,
10851                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10852                                   NL80211_FLAG_NEED_RTNL,
10853         },
10854         {
10855                 .cmd = NL80211_CMD_SET_BEACON,
10856                 .policy = nl80211_policy,
10857                 .flags = GENL_ADMIN_PERM,
10858                 .doit = nl80211_set_beacon,
10859                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10860                                   NL80211_FLAG_NEED_RTNL,
10861         },
10862         {
10863                 .cmd = NL80211_CMD_START_AP,
10864                 .policy = nl80211_policy,
10865                 .flags = GENL_ADMIN_PERM,
10866                 .doit = nl80211_start_ap,
10867                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10868                                   NL80211_FLAG_NEED_RTNL,
10869         },
10870         {
10871                 .cmd = NL80211_CMD_STOP_AP,
10872                 .policy = nl80211_policy,
10873                 .flags = GENL_ADMIN_PERM,
10874                 .doit = nl80211_stop_ap,
10875                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10876                                   NL80211_FLAG_NEED_RTNL,
10877         },
10878         {
10879                 .cmd = NL80211_CMD_GET_STATION,
10880                 .doit = nl80211_get_station,
10881                 .dumpit = nl80211_dump_station,
10882                 .policy = nl80211_policy,
10883                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
10884                                   NL80211_FLAG_NEED_RTNL,
10885         },
10886         {
10887                 .cmd = NL80211_CMD_SET_STATION,
10888                 .doit = nl80211_set_station,
10889                 .policy = nl80211_policy,
10890                 .flags = GENL_ADMIN_PERM,
10891                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10892                                   NL80211_FLAG_NEED_RTNL,
10893         },
10894         {
10895                 .cmd = NL80211_CMD_NEW_STATION,
10896                 .doit = nl80211_new_station,
10897                 .policy = nl80211_policy,
10898                 .flags = GENL_ADMIN_PERM,
10899                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10900                                   NL80211_FLAG_NEED_RTNL,
10901         },
10902         {
10903                 .cmd = NL80211_CMD_DEL_STATION,
10904                 .doit = nl80211_del_station,
10905                 .policy = nl80211_policy,
10906                 .flags = GENL_ADMIN_PERM,
10907                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10908                                   NL80211_FLAG_NEED_RTNL,
10909         },
10910         {
10911                 .cmd = NL80211_CMD_GET_MPATH,
10912                 .doit = nl80211_get_mpath,
10913                 .dumpit = nl80211_dump_mpath,
10914                 .policy = nl80211_policy,
10915                 .flags = GENL_ADMIN_PERM,
10916                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10917                                   NL80211_FLAG_NEED_RTNL,
10918         },
10919         {
10920                 .cmd = NL80211_CMD_GET_MPP,
10921                 .doit = nl80211_get_mpp,
10922                 .dumpit = nl80211_dump_mpp,
10923                 .policy = nl80211_policy,
10924                 .flags = GENL_ADMIN_PERM,
10925                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10926                                   NL80211_FLAG_NEED_RTNL,
10927         },
10928         {
10929                 .cmd = NL80211_CMD_SET_MPATH,
10930                 .doit = nl80211_set_mpath,
10931                 .policy = nl80211_policy,
10932                 .flags = GENL_ADMIN_PERM,
10933                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10934                                   NL80211_FLAG_NEED_RTNL,
10935         },
10936         {
10937                 .cmd = NL80211_CMD_NEW_MPATH,
10938                 .doit = nl80211_new_mpath,
10939                 .policy = nl80211_policy,
10940                 .flags = GENL_ADMIN_PERM,
10941                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10942                                   NL80211_FLAG_NEED_RTNL,
10943         },
10944         {
10945                 .cmd = NL80211_CMD_DEL_MPATH,
10946                 .doit = nl80211_del_mpath,
10947                 .policy = nl80211_policy,
10948                 .flags = GENL_ADMIN_PERM,
10949                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10950                                   NL80211_FLAG_NEED_RTNL,
10951         },
10952         {
10953                 .cmd = NL80211_CMD_SET_BSS,
10954                 .doit = nl80211_set_bss,
10955                 .policy = nl80211_policy,
10956                 .flags = GENL_ADMIN_PERM,
10957                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10958                                   NL80211_FLAG_NEED_RTNL,
10959         },
10960         {
10961                 .cmd = NL80211_CMD_GET_REG,
10962                 .doit = nl80211_get_reg_do,
10963                 .dumpit = nl80211_get_reg_dump,
10964                 .policy = nl80211_policy,
10965                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10966                 /* can be retrieved by unprivileged users */
10967         },
10968 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
10969         {
10970                 .cmd = NL80211_CMD_SET_REG,
10971                 .doit = nl80211_set_reg,
10972                 .policy = nl80211_policy,
10973                 .flags = GENL_ADMIN_PERM,
10974                 .internal_flags = NL80211_FLAG_NEED_RTNL,
10975         },
10976 #endif
10977         {
10978                 .cmd = NL80211_CMD_REQ_SET_REG,
10979                 .doit = nl80211_req_set_reg,
10980                 .policy = nl80211_policy,
10981                 .flags = GENL_ADMIN_PERM,
10982         },
10983         {
10984                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
10985                 .doit = nl80211_get_mesh_config,
10986                 .policy = nl80211_policy,
10987                 /* can be retrieved by unprivileged users */
10988                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10989                                   NL80211_FLAG_NEED_RTNL,
10990         },
10991         {
10992                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
10993                 .doit = nl80211_update_mesh_config,
10994                 .policy = nl80211_policy,
10995                 .flags = GENL_ADMIN_PERM,
10996                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
10997                                   NL80211_FLAG_NEED_RTNL,
10998         },
10999         {
11000                 .cmd = NL80211_CMD_TRIGGER_SCAN,
11001                 .doit = nl80211_trigger_scan,
11002                 .policy = nl80211_policy,
11003                 .flags = GENL_ADMIN_PERM,
11004                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11005                                   NL80211_FLAG_NEED_RTNL,
11006         },
11007         {
11008                 .cmd = NL80211_CMD_GET_SCAN,
11009                 .policy = nl80211_policy,
11010                 .dumpit = nl80211_dump_scan,
11011         },
11012         {
11013                 .cmd = NL80211_CMD_START_SCHED_SCAN,
11014                 .doit = nl80211_start_sched_scan,
11015                 .policy = nl80211_policy,
11016                 .flags = GENL_ADMIN_PERM,
11017                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11018                                   NL80211_FLAG_NEED_RTNL,
11019         },
11020         {
11021                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
11022                 .doit = nl80211_stop_sched_scan,
11023                 .policy = nl80211_policy,
11024                 .flags = GENL_ADMIN_PERM,
11025                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11026                                   NL80211_FLAG_NEED_RTNL,
11027         },
11028         {
11029                 .cmd = NL80211_CMD_AUTHENTICATE,
11030                 .doit = nl80211_authenticate,
11031                 .policy = nl80211_policy,
11032                 .flags = GENL_ADMIN_PERM,
11033                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11034                                   NL80211_FLAG_NEED_RTNL |
11035                                   NL80211_FLAG_CLEAR_SKB,
11036         },
11037         {
11038                 .cmd = NL80211_CMD_ASSOCIATE,
11039                 .doit = nl80211_associate,
11040                 .policy = nl80211_policy,
11041                 .flags = GENL_ADMIN_PERM,
11042                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11043                                   NL80211_FLAG_NEED_RTNL,
11044         },
11045         {
11046                 .cmd = NL80211_CMD_DEAUTHENTICATE,
11047                 .doit = nl80211_deauthenticate,
11048                 .policy = nl80211_policy,
11049                 .flags = GENL_ADMIN_PERM,
11050                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11051                                   NL80211_FLAG_NEED_RTNL,
11052         },
11053         {
11054                 .cmd = NL80211_CMD_DISASSOCIATE,
11055                 .doit = nl80211_disassociate,
11056                 .policy = nl80211_policy,
11057                 .flags = GENL_ADMIN_PERM,
11058                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11059                                   NL80211_FLAG_NEED_RTNL,
11060         },
11061         {
11062                 .cmd = NL80211_CMD_JOIN_IBSS,
11063                 .doit = nl80211_join_ibss,
11064                 .policy = nl80211_policy,
11065                 .flags = GENL_ADMIN_PERM,
11066                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11067                                   NL80211_FLAG_NEED_RTNL,
11068         },
11069         {
11070                 .cmd = NL80211_CMD_LEAVE_IBSS,
11071                 .doit = nl80211_leave_ibss,
11072                 .policy = nl80211_policy,
11073                 .flags = GENL_ADMIN_PERM,
11074                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11075                                   NL80211_FLAG_NEED_RTNL,
11076         },
11077 #ifdef CONFIG_NL80211_TESTMODE
11078         {
11079                 .cmd = NL80211_CMD_TESTMODE,
11080                 .doit = nl80211_testmode_do,
11081                 .dumpit = nl80211_testmode_dump,
11082                 .policy = nl80211_policy,
11083                 .flags = GENL_ADMIN_PERM,
11084                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11085                                   NL80211_FLAG_NEED_RTNL,
11086         },
11087 #endif
11088         {
11089                 .cmd = NL80211_CMD_CONNECT,
11090                 .doit = nl80211_connect,
11091                 .policy = nl80211_policy,
11092                 .flags = GENL_ADMIN_PERM,
11093                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11094                                   NL80211_FLAG_NEED_RTNL,
11095         },
11096         {
11097                 .cmd = NL80211_CMD_DISCONNECT,
11098                 .doit = nl80211_disconnect,
11099                 .policy = nl80211_policy,
11100                 .flags = GENL_ADMIN_PERM,
11101                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11102                                   NL80211_FLAG_NEED_RTNL,
11103         },
11104         {
11105                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
11106                 .doit = nl80211_wiphy_netns,
11107                 .policy = nl80211_policy,
11108                 .flags = GENL_ADMIN_PERM,
11109                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11110                                   NL80211_FLAG_NEED_RTNL,
11111         },
11112         {
11113                 .cmd = NL80211_CMD_GET_SURVEY,
11114                 .policy = nl80211_policy,
11115                 .dumpit = nl80211_dump_survey,
11116         },
11117         {
11118                 .cmd = NL80211_CMD_SET_PMKSA,
11119                 .doit = nl80211_setdel_pmksa,
11120                 .policy = nl80211_policy,
11121                 .flags = GENL_ADMIN_PERM,
11122                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11123                                   NL80211_FLAG_NEED_RTNL,
11124         },
11125         {
11126                 .cmd = NL80211_CMD_DEL_PMKSA,
11127                 .doit = nl80211_setdel_pmksa,
11128                 .policy = nl80211_policy,
11129                 .flags = GENL_ADMIN_PERM,
11130                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11131                                   NL80211_FLAG_NEED_RTNL,
11132         },
11133         {
11134                 .cmd = NL80211_CMD_FLUSH_PMKSA,
11135                 .doit = nl80211_flush_pmksa,
11136                 .policy = nl80211_policy,
11137                 .flags = GENL_ADMIN_PERM,
11138                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11139                                   NL80211_FLAG_NEED_RTNL,
11140         },
11141         {
11142                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
11143                 .doit = nl80211_remain_on_channel,
11144                 .policy = nl80211_policy,
11145                 .flags = GENL_ADMIN_PERM,
11146                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11147                                   NL80211_FLAG_NEED_RTNL,
11148         },
11149         {
11150                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
11151                 .doit = nl80211_cancel_remain_on_channel,
11152                 .policy = nl80211_policy,
11153                 .flags = GENL_ADMIN_PERM,
11154                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11155                                   NL80211_FLAG_NEED_RTNL,
11156         },
11157         {
11158                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
11159                 .doit = nl80211_set_tx_bitrate_mask,
11160                 .policy = nl80211_policy,
11161                 .flags = GENL_ADMIN_PERM,
11162                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11163                                   NL80211_FLAG_NEED_RTNL,
11164         },
11165         {
11166                 .cmd = NL80211_CMD_REGISTER_FRAME,
11167                 .doit = nl80211_register_mgmt,
11168                 .policy = nl80211_policy,
11169                 .flags = GENL_ADMIN_PERM,
11170                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11171                                   NL80211_FLAG_NEED_RTNL,
11172         },
11173         {
11174                 .cmd = NL80211_CMD_FRAME,
11175                 .doit = nl80211_tx_mgmt,
11176                 .policy = nl80211_policy,
11177                 .flags = GENL_ADMIN_PERM,
11178                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11179                                   NL80211_FLAG_NEED_RTNL,
11180         },
11181         {
11182                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
11183                 .doit = nl80211_tx_mgmt_cancel_wait,
11184                 .policy = nl80211_policy,
11185                 .flags = GENL_ADMIN_PERM,
11186                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11187                                   NL80211_FLAG_NEED_RTNL,
11188         },
11189         {
11190                 .cmd = NL80211_CMD_SET_POWER_SAVE,
11191                 .doit = nl80211_set_power_save,
11192                 .policy = nl80211_policy,
11193                 .flags = GENL_ADMIN_PERM,
11194                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11195                                   NL80211_FLAG_NEED_RTNL,
11196         },
11197         {
11198                 .cmd = NL80211_CMD_GET_POWER_SAVE,
11199                 .doit = nl80211_get_power_save,
11200                 .policy = nl80211_policy,
11201                 /* can be retrieved by unprivileged users */
11202                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11203                                   NL80211_FLAG_NEED_RTNL,
11204         },
11205         {
11206                 .cmd = NL80211_CMD_SET_CQM,
11207                 .doit = nl80211_set_cqm,
11208                 .policy = nl80211_policy,
11209                 .flags = GENL_ADMIN_PERM,
11210                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11211                                   NL80211_FLAG_NEED_RTNL,
11212         },
11213         {
11214                 .cmd = NL80211_CMD_SET_CHANNEL,
11215                 .doit = nl80211_set_channel,
11216                 .policy = nl80211_policy,
11217                 .flags = GENL_ADMIN_PERM,
11218                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11219                                   NL80211_FLAG_NEED_RTNL,
11220         },
11221         {
11222                 .cmd = NL80211_CMD_SET_WDS_PEER,
11223                 .doit = nl80211_set_wds_peer,
11224                 .policy = nl80211_policy,
11225                 .flags = GENL_ADMIN_PERM,
11226                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11227                                   NL80211_FLAG_NEED_RTNL,
11228         },
11229         {
11230                 .cmd = NL80211_CMD_JOIN_MESH,
11231                 .doit = nl80211_join_mesh,
11232                 .policy = nl80211_policy,
11233                 .flags = GENL_ADMIN_PERM,
11234                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11235                                   NL80211_FLAG_NEED_RTNL,
11236         },
11237         {
11238                 .cmd = NL80211_CMD_LEAVE_MESH,
11239                 .doit = nl80211_leave_mesh,
11240                 .policy = nl80211_policy,
11241                 .flags = GENL_ADMIN_PERM,
11242                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11243                                   NL80211_FLAG_NEED_RTNL,
11244         },
11245         {
11246                 .cmd = NL80211_CMD_JOIN_OCB,
11247                 .doit = nl80211_join_ocb,
11248                 .policy = nl80211_policy,
11249                 .flags = GENL_ADMIN_PERM,
11250                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11251                                   NL80211_FLAG_NEED_RTNL,
11252         },
11253         {
11254                 .cmd = NL80211_CMD_LEAVE_OCB,
11255                 .doit = nl80211_leave_ocb,
11256                 .policy = nl80211_policy,
11257                 .flags = GENL_ADMIN_PERM,
11258                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11259                                   NL80211_FLAG_NEED_RTNL,
11260         },
11261 #ifdef CONFIG_PM
11262         {
11263                 .cmd = NL80211_CMD_GET_WOWLAN,
11264                 .doit = nl80211_get_wowlan,
11265                 .policy = nl80211_policy,
11266                 /* can be retrieved by unprivileged users */
11267                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11268                                   NL80211_FLAG_NEED_RTNL,
11269         },
11270         {
11271                 .cmd = NL80211_CMD_SET_WOWLAN,
11272                 .doit = nl80211_set_wowlan,
11273                 .policy = nl80211_policy,
11274                 .flags = GENL_ADMIN_PERM,
11275                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11276                                   NL80211_FLAG_NEED_RTNL,
11277         },
11278 #endif
11279         {
11280                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
11281                 .doit = nl80211_set_rekey_data,
11282                 .policy = nl80211_policy,
11283                 .flags = GENL_ADMIN_PERM,
11284                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11285                                   NL80211_FLAG_NEED_RTNL |
11286                                   NL80211_FLAG_CLEAR_SKB,
11287         },
11288         {
11289                 .cmd = NL80211_CMD_TDLS_MGMT,
11290                 .doit = nl80211_tdls_mgmt,
11291                 .policy = nl80211_policy,
11292                 .flags = GENL_ADMIN_PERM,
11293                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11294                                   NL80211_FLAG_NEED_RTNL,
11295         },
11296         {
11297                 .cmd = NL80211_CMD_TDLS_OPER,
11298                 .doit = nl80211_tdls_oper,
11299                 .policy = nl80211_policy,
11300                 .flags = GENL_ADMIN_PERM,
11301                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11302                                   NL80211_FLAG_NEED_RTNL,
11303         },
11304         {
11305                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
11306                 .doit = nl80211_register_unexpected_frame,
11307                 .policy = nl80211_policy,
11308                 .flags = GENL_ADMIN_PERM,
11309                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11310                                   NL80211_FLAG_NEED_RTNL,
11311         },
11312         {
11313                 .cmd = NL80211_CMD_PROBE_CLIENT,
11314                 .doit = nl80211_probe_client,
11315                 .policy = nl80211_policy,
11316                 .flags = GENL_ADMIN_PERM,
11317                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11318                                   NL80211_FLAG_NEED_RTNL,
11319         },
11320         {
11321                 .cmd = NL80211_CMD_REGISTER_BEACONS,
11322                 .doit = nl80211_register_beacons,
11323                 .policy = nl80211_policy,
11324                 .flags = GENL_ADMIN_PERM,
11325                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11326                                   NL80211_FLAG_NEED_RTNL,
11327         },
11328         {
11329                 .cmd = NL80211_CMD_SET_NOACK_MAP,
11330                 .doit = nl80211_set_noack_map,
11331                 .policy = nl80211_policy,
11332                 .flags = GENL_ADMIN_PERM,
11333                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11334                                   NL80211_FLAG_NEED_RTNL,
11335         },
11336         {
11337                 .cmd = NL80211_CMD_START_P2P_DEVICE,
11338                 .doit = nl80211_start_p2p_device,
11339                 .policy = nl80211_policy,
11340                 .flags = GENL_ADMIN_PERM,
11341                 .internal_flags = NL80211_FLAG_NEED_WDEV |
11342                                   NL80211_FLAG_NEED_RTNL,
11343         },
11344         {
11345                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
11346                 .doit = nl80211_stop_p2p_device,
11347                 .policy = nl80211_policy,
11348                 .flags = GENL_ADMIN_PERM,
11349                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11350                                   NL80211_FLAG_NEED_RTNL,
11351         },
11352         {
11353                 .cmd = NL80211_CMD_SET_MCAST_RATE,
11354                 .doit = nl80211_set_mcast_rate,
11355                 .policy = nl80211_policy,
11356                 .flags = GENL_ADMIN_PERM,
11357                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11358                                   NL80211_FLAG_NEED_RTNL,
11359         },
11360         {
11361                 .cmd = NL80211_CMD_SET_MAC_ACL,
11362                 .doit = nl80211_set_mac_acl,
11363                 .policy = nl80211_policy,
11364                 .flags = GENL_ADMIN_PERM,
11365                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
11366                                   NL80211_FLAG_NEED_RTNL,
11367         },
11368         {
11369                 .cmd = NL80211_CMD_RADAR_DETECT,
11370                 .doit = nl80211_start_radar_detection,
11371                 .policy = nl80211_policy,
11372                 .flags = GENL_ADMIN_PERM,
11373                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11374                                   NL80211_FLAG_NEED_RTNL,
11375         },
11376         {
11377                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
11378                 .doit = nl80211_get_protocol_features,
11379                 .policy = nl80211_policy,
11380         },
11381         {
11382                 .cmd = NL80211_CMD_UPDATE_FT_IES,
11383                 .doit = nl80211_update_ft_ies,
11384                 .policy = nl80211_policy,
11385                 .flags = GENL_ADMIN_PERM,
11386                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11387                                   NL80211_FLAG_NEED_RTNL,
11388         },
11389         {
11390                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
11391                 .doit = nl80211_crit_protocol_start,
11392                 .policy = nl80211_policy,
11393                 .flags = GENL_ADMIN_PERM,
11394                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11395                                   NL80211_FLAG_NEED_RTNL,
11396         },
11397         {
11398                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
11399                 .doit = nl80211_crit_protocol_stop,
11400                 .policy = nl80211_policy,
11401                 .flags = GENL_ADMIN_PERM,
11402                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
11403                                   NL80211_FLAG_NEED_RTNL,
11404         },
11405         {
11406                 .cmd = NL80211_CMD_GET_COALESCE,
11407                 .doit = nl80211_get_coalesce,
11408                 .policy = nl80211_policy,
11409                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11410                                   NL80211_FLAG_NEED_RTNL,
11411         },
11412         {
11413                 .cmd = NL80211_CMD_SET_COALESCE,
11414                 .doit = nl80211_set_coalesce,
11415                 .policy = nl80211_policy,
11416                 .flags = GENL_ADMIN_PERM,
11417                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11418                                   NL80211_FLAG_NEED_RTNL,
11419         },
11420         {
11421                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
11422                 .doit = nl80211_channel_switch,
11423                 .policy = nl80211_policy,
11424                 .flags = GENL_ADMIN_PERM,
11425                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11426                                   NL80211_FLAG_NEED_RTNL,
11427         },
11428         {
11429                 .cmd = NL80211_CMD_VENDOR,
11430                 .doit = nl80211_vendor_cmd,
11431                 .dumpit = nl80211_vendor_cmd_dump,
11432                 .policy = nl80211_policy,
11433                 .flags = GENL_ADMIN_PERM,
11434                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
11435                                   NL80211_FLAG_NEED_RTNL,
11436         },
11437         {
11438                 .cmd = NL80211_CMD_SET_QOS_MAP,
11439                 .doit = nl80211_set_qos_map,
11440                 .policy = nl80211_policy,
11441                 .flags = GENL_ADMIN_PERM,
11442                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11443                                   NL80211_FLAG_NEED_RTNL,
11444         },
11445         {
11446                 .cmd = NL80211_CMD_ADD_TX_TS,
11447                 .doit = nl80211_add_tx_ts,
11448                 .policy = nl80211_policy,
11449                 .flags = GENL_ADMIN_PERM,
11450                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11451                                   NL80211_FLAG_NEED_RTNL,
11452         },
11453         {
11454                 .cmd = NL80211_CMD_DEL_TX_TS,
11455                 .doit = nl80211_del_tx_ts,
11456                 .policy = nl80211_policy,
11457                 .flags = GENL_ADMIN_PERM,
11458                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11459                                   NL80211_FLAG_NEED_RTNL,
11460         },
11461         {
11462                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
11463                 .doit = nl80211_tdls_channel_switch,
11464                 .policy = nl80211_policy,
11465                 .flags = GENL_ADMIN_PERM,
11466                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11467                                   NL80211_FLAG_NEED_RTNL,
11468         },
11469         {
11470                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
11471                 .doit = nl80211_tdls_cancel_channel_switch,
11472                 .policy = nl80211_policy,
11473                 .flags = GENL_ADMIN_PERM,
11474                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
11475                                   NL80211_FLAG_NEED_RTNL,
11476         },
11477 };
11478
11479 /* notification functions */
11480
11481 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
11482                           enum nl80211_commands cmd)
11483 {
11484         struct sk_buff *msg;
11485         struct nl80211_dump_wiphy_state state = {};
11486
11487         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
11488                 cmd != NL80211_CMD_DEL_WIPHY);
11489
11490         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11491         if (!msg)
11492                 return;
11493
11494         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
11495                 nlmsg_free(msg);
11496                 return;
11497         }
11498
11499         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11500                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
11501 }
11502
11503 static int nl80211_add_scan_req(struct sk_buff *msg,
11504                                 struct cfg80211_registered_device *rdev)
11505 {
11506         struct cfg80211_scan_request *req = rdev->scan_req;
11507         struct nlattr *nest;
11508         int i;
11509
11510         if (WARN_ON(!req))
11511                 return 0;
11512
11513         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
11514         if (!nest)
11515                 goto nla_put_failure;
11516         for (i = 0; i < req->n_ssids; i++) {
11517                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
11518                         goto nla_put_failure;
11519         }
11520         nla_nest_end(msg, nest);
11521
11522         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
11523         if (!nest)
11524                 goto nla_put_failure;
11525         for (i = 0; i < req->n_channels; i++) {
11526                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
11527                         goto nla_put_failure;
11528         }
11529         nla_nest_end(msg, nest);
11530
11531         if (req->ie &&
11532             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
11533                 goto nla_put_failure;
11534
11535         if (req->flags &&
11536             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
11537                 goto nla_put_failure;
11538
11539         return 0;
11540  nla_put_failure:
11541         return -ENOBUFS;
11542 }
11543
11544 static int nl80211_send_scan_msg(struct sk_buff *msg,
11545                                  struct cfg80211_registered_device *rdev,
11546                                  struct wireless_dev *wdev,
11547                                  u32 portid, u32 seq, int flags,
11548                                  u32 cmd)
11549 {
11550         void *hdr;
11551
11552         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11553         if (!hdr)
11554                 return -1;
11555
11556         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11557             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11558                                          wdev->netdev->ifindex)) ||
11559             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
11560                 goto nla_put_failure;
11561
11562         /* ignore errors and send incomplete event anyway */
11563         nl80211_add_scan_req(msg, rdev);
11564
11565         genlmsg_end(msg, hdr);
11566         return 0;
11567
11568  nla_put_failure:
11569         genlmsg_cancel(msg, hdr);
11570         return -EMSGSIZE;
11571 }
11572
11573 static int
11574 nl80211_send_sched_scan_msg(struct sk_buff *msg,
11575                             struct cfg80211_registered_device *rdev,
11576                             struct net_device *netdev,
11577                             u32 portid, u32 seq, int flags, u32 cmd)
11578 {
11579         void *hdr;
11580
11581         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
11582         if (!hdr)
11583                 return -1;
11584
11585         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11586             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
11587                 goto nla_put_failure;
11588
11589         genlmsg_end(msg, hdr);
11590         return 0;
11591
11592  nla_put_failure:
11593         genlmsg_cancel(msg, hdr);
11594         return -EMSGSIZE;
11595 }
11596
11597 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
11598                              struct wireless_dev *wdev)
11599 {
11600         struct sk_buff *msg;
11601
11602         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11603         if (!msg)
11604                 return;
11605
11606         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11607                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
11608                 nlmsg_free(msg);
11609                 return;
11610         }
11611
11612         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11613                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11614 }
11615
11616 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
11617                                        struct wireless_dev *wdev, bool aborted)
11618 {
11619         struct sk_buff *msg;
11620
11621         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11622         if (!msg)
11623                 return NULL;
11624
11625         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
11626                                   aborted ? NL80211_CMD_SCAN_ABORTED :
11627                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
11628                 nlmsg_free(msg);
11629                 return NULL;
11630         }
11631
11632         return msg;
11633 }
11634
11635 void nl80211_send_scan_result(struct cfg80211_registered_device *rdev,
11636                               struct sk_buff *msg)
11637 {
11638         if (!msg)
11639                 return;
11640
11641         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11642                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11643 }
11644
11645 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
11646                                      struct net_device *netdev)
11647 {
11648         struct sk_buff *msg;
11649
11650         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11651         if (!msg)
11652                 return;
11653
11654         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
11655                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
11656                 nlmsg_free(msg);
11657                 return;
11658         }
11659
11660         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11661                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11662 }
11663
11664 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
11665                              struct net_device *netdev, u32 cmd)
11666 {
11667         struct sk_buff *msg;
11668
11669         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11670         if (!msg)
11671                 return;
11672
11673         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
11674                 nlmsg_free(msg);
11675                 return;
11676         }
11677
11678         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11679                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
11680 }
11681
11682 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
11683                                           struct regulatory_request *request)
11684 {
11685         /* Userspace can always count this one always being set */
11686         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
11687                 goto nla_put_failure;
11688
11689         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
11690                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11691                                NL80211_REGDOM_TYPE_WORLD))
11692                         goto nla_put_failure;
11693         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
11694                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11695                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
11696                         goto nla_put_failure;
11697         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
11698                    request->intersect) {
11699                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11700                                NL80211_REGDOM_TYPE_INTERSECTION))
11701                         goto nla_put_failure;
11702         } else {
11703                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
11704                                NL80211_REGDOM_TYPE_COUNTRY) ||
11705                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
11706                                    request->alpha2))
11707                         goto nla_put_failure;
11708         }
11709
11710         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
11711                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
11712
11713                 if (wiphy &&
11714                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
11715                         goto nla_put_failure;
11716
11717                 if (wiphy &&
11718                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
11719                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
11720                         goto nla_put_failure;
11721         }
11722
11723         return true;
11724
11725 nla_put_failure:
11726         return false;
11727 }
11728
11729 /*
11730  * This can happen on global regulatory changes or device specific settings
11731  * based on custom regulatory domains.
11732  */
11733 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
11734                                      struct regulatory_request *request)
11735 {
11736         struct sk_buff *msg;
11737         void *hdr;
11738
11739         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11740         if (!msg)
11741                 return;
11742
11743         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
11744         if (!hdr) {
11745                 nlmsg_free(msg);
11746                 return;
11747         }
11748
11749         if (nl80211_reg_change_event_fill(msg, request) == false)
11750                 goto nla_put_failure;
11751
11752         genlmsg_end(msg, hdr);
11753
11754         rcu_read_lock();
11755         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
11756                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
11757         rcu_read_unlock();
11758
11759         return;
11760
11761 nla_put_failure:
11762         genlmsg_cancel(msg, hdr);
11763         nlmsg_free(msg);
11764 }
11765
11766 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
11767                                     struct net_device *netdev,
11768                                     const u8 *buf, size_t len,
11769                                     enum nl80211_commands cmd, gfp_t gfp,
11770                                     int uapsd_queues)
11771 {
11772         struct sk_buff *msg;
11773         void *hdr;
11774
11775         msg = nlmsg_new(100 + len, gfp);
11776         if (!msg)
11777                 return;
11778
11779         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11780         if (!hdr) {
11781                 nlmsg_free(msg);
11782                 return;
11783         }
11784
11785         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11786             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11787             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
11788                 goto nla_put_failure;
11789
11790         if (uapsd_queues >= 0) {
11791                 struct nlattr *nla_wmm =
11792                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
11793                 if (!nla_wmm)
11794                         goto nla_put_failure;
11795
11796                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
11797                                uapsd_queues))
11798                         goto nla_put_failure;
11799
11800                 nla_nest_end(msg, nla_wmm);
11801         }
11802
11803         genlmsg_end(msg, hdr);
11804
11805         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11806                                 NL80211_MCGRP_MLME, gfp);
11807         return;
11808
11809  nla_put_failure:
11810         genlmsg_cancel(msg, hdr);
11811         nlmsg_free(msg);
11812 }
11813
11814 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
11815                           struct net_device *netdev, const u8 *buf,
11816                           size_t len, gfp_t gfp)
11817 {
11818         nl80211_send_mlme_event(rdev, netdev, buf, len,
11819                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
11820 }
11821
11822 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
11823                            struct net_device *netdev, const u8 *buf,
11824                            size_t len, gfp_t gfp, int uapsd_queues)
11825 {
11826         nl80211_send_mlme_event(rdev, netdev, buf, len,
11827                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
11828 }
11829
11830 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
11831                          struct net_device *netdev, const u8 *buf,
11832                          size_t len, gfp_t gfp)
11833 {
11834         nl80211_send_mlme_event(rdev, netdev, buf, len,
11835                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
11836 }
11837
11838 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
11839                            struct net_device *netdev, const u8 *buf,
11840                            size_t len, gfp_t gfp)
11841 {
11842         nl80211_send_mlme_event(rdev, netdev, buf, len,
11843                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
11844 }
11845
11846 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
11847                                   size_t len)
11848 {
11849         struct wireless_dev *wdev = dev->ieee80211_ptr;
11850         struct wiphy *wiphy = wdev->wiphy;
11851         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11852         const struct ieee80211_mgmt *mgmt = (void *)buf;
11853         u32 cmd;
11854
11855         if (WARN_ON(len < 2))
11856                 return;
11857
11858         if (ieee80211_is_deauth(mgmt->frame_control))
11859                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
11860         else
11861                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
11862
11863         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
11864         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
11865 }
11866 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
11867
11868 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
11869                                       struct net_device *netdev, int cmd,
11870                                       const u8 *addr, gfp_t gfp)
11871 {
11872         struct sk_buff *msg;
11873         void *hdr;
11874
11875         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11876         if (!msg)
11877                 return;
11878
11879         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
11880         if (!hdr) {
11881                 nlmsg_free(msg);
11882                 return;
11883         }
11884
11885         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11886             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11887             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
11888             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
11889                 goto nla_put_failure;
11890
11891         genlmsg_end(msg, hdr);
11892
11893         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11894                                 NL80211_MCGRP_MLME, gfp);
11895         return;
11896
11897  nla_put_failure:
11898         genlmsg_cancel(msg, hdr);
11899         nlmsg_free(msg);
11900 }
11901
11902 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
11903                                struct net_device *netdev, const u8 *addr,
11904                                gfp_t gfp)
11905 {
11906         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
11907                                   addr, gfp);
11908 }
11909
11910 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
11911                                 struct net_device *netdev, const u8 *addr,
11912                                 gfp_t gfp)
11913 {
11914         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
11915                                   addr, gfp);
11916 }
11917
11918 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
11919                                  struct net_device *netdev, const u8 *bssid,
11920                                  const u8 *req_ie, size_t req_ie_len,
11921                                  const u8 *resp_ie, size_t resp_ie_len,
11922                                  u16 status, gfp_t gfp)
11923 {
11924         struct sk_buff *msg;
11925         void *hdr;
11926
11927         msg = nlmsg_new(100 + req_ie_len + resp_ie_len, gfp);
11928         if (!msg)
11929                 return;
11930
11931         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
11932         if (!hdr) {
11933                 nlmsg_free(msg);
11934                 return;
11935         }
11936
11937         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11938             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11939             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
11940             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
11941             (req_ie &&
11942              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11943             (resp_ie &&
11944              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11945                 goto nla_put_failure;
11946
11947         genlmsg_end(msg, hdr);
11948
11949         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11950                                 NL80211_MCGRP_MLME, gfp);
11951         return;
11952
11953  nla_put_failure:
11954         genlmsg_cancel(msg, hdr);
11955         nlmsg_free(msg);
11956
11957 }
11958
11959 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
11960                          struct net_device *netdev, const u8 *bssid,
11961                          const u8 *req_ie, size_t req_ie_len,
11962                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
11963 {
11964         struct sk_buff *msg;
11965         void *hdr;
11966
11967         msg = nlmsg_new(100 + req_ie_len + resp_ie_len, gfp);
11968         if (!msg)
11969                 return;
11970
11971         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
11972         if (!hdr) {
11973                 nlmsg_free(msg);
11974                 return;
11975         }
11976
11977         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11978             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
11979             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
11980             (req_ie &&
11981              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
11982             (resp_ie &&
11983              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
11984                 goto nla_put_failure;
11985
11986         genlmsg_end(msg, hdr);
11987
11988         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
11989                                 NL80211_MCGRP_MLME, gfp);
11990         return;
11991
11992  nla_put_failure:
11993         genlmsg_cancel(msg, hdr);
11994         nlmsg_free(msg);
11995
11996 }
11997
11998 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
11999                                struct net_device *netdev, u16 reason,
12000                                const u8 *ie, size_t ie_len, bool from_ap)
12001 {
12002         struct sk_buff *msg;
12003         void *hdr;
12004
12005         msg = nlmsg_new(100 + ie_len, GFP_KERNEL);
12006         if (!msg)
12007                 return;
12008
12009         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
12010         if (!hdr) {
12011                 nlmsg_free(msg);
12012                 return;
12013         }
12014
12015         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12016             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12017             (from_ap && reason &&
12018              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
12019             (from_ap &&
12020              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
12021             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
12022                 goto nla_put_failure;
12023
12024         genlmsg_end(msg, hdr);
12025
12026         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12027                                 NL80211_MCGRP_MLME, GFP_KERNEL);
12028         return;
12029
12030  nla_put_failure:
12031         genlmsg_cancel(msg, hdr);
12032         nlmsg_free(msg);
12033
12034 }
12035
12036 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
12037                              struct net_device *netdev, const u8 *bssid,
12038                              gfp_t gfp)
12039 {
12040         struct sk_buff *msg;
12041         void *hdr;
12042
12043         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12044         if (!msg)
12045                 return;
12046
12047         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
12048         if (!hdr) {
12049                 nlmsg_free(msg);
12050                 return;
12051         }
12052
12053         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12054             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12055             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12056                 goto nla_put_failure;
12057
12058         genlmsg_end(msg, hdr);
12059
12060         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12061                                 NL80211_MCGRP_MLME, gfp);
12062         return;
12063
12064  nla_put_failure:
12065         genlmsg_cancel(msg, hdr);
12066         nlmsg_free(msg);
12067 }
12068
12069 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
12070                                         const u8* ie, u8 ie_len, gfp_t gfp)
12071 {
12072         struct wireless_dev *wdev = dev->ieee80211_ptr;
12073         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12074         struct sk_buff *msg;
12075         void *hdr;
12076
12077         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
12078                 return;
12079
12080         trace_cfg80211_notify_new_peer_candidate(dev, addr);
12081
12082         msg = nlmsg_new(100 + ie_len, gfp);
12083         if (!msg)
12084                 return;
12085
12086         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
12087         if (!hdr) {
12088                 nlmsg_free(msg);
12089                 return;
12090         }
12091
12092         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12093             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12094             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12095             (ie_len && ie &&
12096              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
12097                 goto nla_put_failure;
12098
12099         genlmsg_end(msg, hdr);
12100
12101         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12102                                 NL80211_MCGRP_MLME, gfp);
12103         return;
12104
12105  nla_put_failure:
12106         genlmsg_cancel(msg, hdr);
12107         nlmsg_free(msg);
12108 }
12109 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
12110
12111 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
12112                                  struct net_device *netdev, const u8 *addr,
12113                                  enum nl80211_key_type key_type, int key_id,
12114                                  const u8 *tsc, gfp_t gfp)
12115 {
12116         struct sk_buff *msg;
12117         void *hdr;
12118
12119         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12120         if (!msg)
12121                 return;
12122
12123         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
12124         if (!hdr) {
12125                 nlmsg_free(msg);
12126                 return;
12127         }
12128
12129         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12130             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12131             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
12132             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
12133             (key_id != -1 &&
12134              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
12135             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
12136                 goto nla_put_failure;
12137
12138         genlmsg_end(msg, hdr);
12139
12140         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12141                                 NL80211_MCGRP_MLME, gfp);
12142         return;
12143
12144  nla_put_failure:
12145         genlmsg_cancel(msg, hdr);
12146         nlmsg_free(msg);
12147 }
12148
12149 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
12150                                     struct ieee80211_channel *channel_before,
12151                                     struct ieee80211_channel *channel_after)
12152 {
12153         struct sk_buff *msg;
12154         void *hdr;
12155         struct nlattr *nl_freq;
12156
12157         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
12158         if (!msg)
12159                 return;
12160
12161         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
12162         if (!hdr) {
12163                 nlmsg_free(msg);
12164                 return;
12165         }
12166
12167         /*
12168          * Since we are applying the beacon hint to a wiphy we know its
12169          * wiphy_idx is valid
12170          */
12171         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
12172                 goto nla_put_failure;
12173
12174         /* Before */
12175         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
12176         if (!nl_freq)
12177                 goto nla_put_failure;
12178         if (nl80211_msg_put_channel(msg, channel_before, false))
12179                 goto nla_put_failure;
12180         nla_nest_end(msg, nl_freq);
12181
12182         /* After */
12183         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
12184         if (!nl_freq)
12185                 goto nla_put_failure;
12186         if (nl80211_msg_put_channel(msg, channel_after, false))
12187                 goto nla_put_failure;
12188         nla_nest_end(msg, nl_freq);
12189
12190         genlmsg_end(msg, hdr);
12191
12192         rcu_read_lock();
12193         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
12194                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
12195         rcu_read_unlock();
12196
12197         return;
12198
12199 nla_put_failure:
12200         genlmsg_cancel(msg, hdr);
12201         nlmsg_free(msg);
12202 }
12203
12204 static void nl80211_send_remain_on_chan_event(
12205         int cmd, struct cfg80211_registered_device *rdev,
12206         struct wireless_dev *wdev, u64 cookie,
12207         struct ieee80211_channel *chan,
12208         unsigned int duration, gfp_t gfp)
12209 {
12210         struct sk_buff *msg;
12211         void *hdr;
12212
12213         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12214         if (!msg)
12215                 return;
12216
12217         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12218         if (!hdr) {
12219                 nlmsg_free(msg);
12220                 return;
12221         }
12222
12223         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12224             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12225                                          wdev->netdev->ifindex)) ||
12226             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12227             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
12228             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
12229                         NL80211_CHAN_NO_HT) ||
12230             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
12231                 goto nla_put_failure;
12232
12233         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
12234             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
12235                 goto nla_put_failure;
12236
12237         genlmsg_end(msg, hdr);
12238
12239         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12240                                 NL80211_MCGRP_MLME, gfp);
12241         return;
12242
12243  nla_put_failure:
12244         genlmsg_cancel(msg, hdr);
12245         nlmsg_free(msg);
12246 }
12247
12248 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
12249                                struct ieee80211_channel *chan,
12250                                unsigned int duration, gfp_t gfp)
12251 {
12252         struct wiphy *wiphy = wdev->wiphy;
12253         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12254
12255         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
12256         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
12257                                           rdev, wdev, cookie, chan,
12258                                           duration, gfp);
12259 }
12260 EXPORT_SYMBOL(cfg80211_ready_on_channel);
12261
12262 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
12263                                         struct ieee80211_channel *chan,
12264                                         gfp_t gfp)
12265 {
12266         struct wiphy *wiphy = wdev->wiphy;
12267         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12268
12269         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
12270         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12271                                           rdev, wdev, cookie, chan, 0, gfp);
12272 }
12273 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
12274
12275 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
12276                       struct station_info *sinfo, gfp_t gfp)
12277 {
12278         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12279         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12280         struct sk_buff *msg;
12281
12282         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
12283
12284         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12285         if (!msg)
12286                 return;
12287
12288         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
12289                                  rdev, dev, mac_addr, sinfo) < 0) {
12290                 nlmsg_free(msg);
12291                 return;
12292         }
12293
12294         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12295                                 NL80211_MCGRP_MLME, gfp);
12296 }
12297 EXPORT_SYMBOL(cfg80211_new_sta);
12298
12299 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
12300                             struct station_info *sinfo, gfp_t gfp)
12301 {
12302         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12303         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12304         struct sk_buff *msg;
12305         struct station_info empty_sinfo = {};
12306
12307         if (!sinfo)
12308                 sinfo = &empty_sinfo;
12309
12310         trace_cfg80211_del_sta(dev, mac_addr);
12311
12312         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12313         if (!msg)
12314                 return;
12315
12316         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
12317                                  rdev, dev, mac_addr, sinfo) < 0) {
12318                 nlmsg_free(msg);
12319                 return;
12320         }
12321
12322         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12323                                 NL80211_MCGRP_MLME, gfp);
12324 }
12325 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
12326
12327 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
12328                           enum nl80211_connect_failed_reason reason,
12329                           gfp_t gfp)
12330 {
12331         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
12332         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12333         struct sk_buff *msg;
12334         void *hdr;
12335
12336         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
12337         if (!msg)
12338                 return;
12339
12340         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
12341         if (!hdr) {
12342                 nlmsg_free(msg);
12343                 return;
12344         }
12345
12346         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12347             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
12348             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
12349                 goto nla_put_failure;
12350
12351         genlmsg_end(msg, hdr);
12352
12353         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12354                                 NL80211_MCGRP_MLME, gfp);
12355         return;
12356
12357  nla_put_failure:
12358         genlmsg_cancel(msg, hdr);
12359         nlmsg_free(msg);
12360 }
12361 EXPORT_SYMBOL(cfg80211_conn_failed);
12362
12363 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
12364                                        const u8 *addr, gfp_t gfp)
12365 {
12366         struct wireless_dev *wdev = dev->ieee80211_ptr;
12367         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12368         struct sk_buff *msg;
12369         void *hdr;
12370         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
12371
12372         if (!nlportid)
12373                 return false;
12374
12375         msg = nlmsg_new(100, gfp);
12376         if (!msg)
12377                 return true;
12378
12379         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
12380         if (!hdr) {
12381                 nlmsg_free(msg);
12382                 return true;
12383         }
12384
12385         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12386             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12387             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
12388                 goto nla_put_failure;
12389
12390         genlmsg_end(msg, hdr);
12391         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12392         return true;
12393
12394  nla_put_failure:
12395         genlmsg_cancel(msg, hdr);
12396         nlmsg_free(msg);
12397         return true;
12398 }
12399
12400 bool cfg80211_rx_spurious_frame(struct net_device *dev,
12401                                 const u8 *addr, gfp_t gfp)
12402 {
12403         struct wireless_dev *wdev = dev->ieee80211_ptr;
12404         bool ret;
12405
12406         trace_cfg80211_rx_spurious_frame(dev, addr);
12407
12408         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12409                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
12410                 trace_cfg80211_return_bool(false);
12411                 return false;
12412         }
12413         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
12414                                          addr, gfp);
12415         trace_cfg80211_return_bool(ret);
12416         return ret;
12417 }
12418 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
12419
12420 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
12421                                         const u8 *addr, gfp_t gfp)
12422 {
12423         struct wireless_dev *wdev = dev->ieee80211_ptr;
12424         bool ret;
12425
12426         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
12427
12428         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
12429                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
12430                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
12431                 trace_cfg80211_return_bool(false);
12432                 return false;
12433         }
12434         ret = __nl80211_unexpected_frame(dev,
12435                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
12436                                          addr, gfp);
12437         trace_cfg80211_return_bool(ret);
12438         return ret;
12439 }
12440 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
12441
12442 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
12443                       struct wireless_dev *wdev, u32 nlportid,
12444                       int freq, int sig_dbm,
12445                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
12446 {
12447         struct net_device *netdev = wdev->netdev;
12448         struct sk_buff *msg;
12449         void *hdr;
12450
12451         msg = nlmsg_new(100 + len, gfp);
12452         if (!msg)
12453                 return -ENOMEM;
12454
12455         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12456         if (!hdr) {
12457                 nlmsg_free(msg);
12458                 return -ENOMEM;
12459         }
12460
12461         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12462             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12463                                         netdev->ifindex)) ||
12464             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12465             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
12466             (sig_dbm &&
12467              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12468             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12469             (flags &&
12470              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
12471                 goto nla_put_failure;
12472
12473         genlmsg_end(msg, hdr);
12474
12475         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
12476
12477  nla_put_failure:
12478         genlmsg_cancel(msg, hdr);
12479         nlmsg_free(msg);
12480         return -ENOBUFS;
12481 }
12482
12483 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
12484                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
12485 {
12486         struct wiphy *wiphy = wdev->wiphy;
12487         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12488         struct net_device *netdev = wdev->netdev;
12489         struct sk_buff *msg;
12490         void *hdr;
12491
12492         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
12493
12494         msg = nlmsg_new(100 + len, gfp);
12495         if (!msg)
12496                 return;
12497
12498         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
12499         if (!hdr) {
12500                 nlmsg_free(msg);
12501                 return;
12502         }
12503
12504         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12505             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
12506                                    netdev->ifindex)) ||
12507             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
12508             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
12509             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12510             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
12511                 goto nla_put_failure;
12512
12513         genlmsg_end(msg, hdr);
12514
12515         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12516                                 NL80211_MCGRP_MLME, gfp);
12517         return;
12518
12519  nla_put_failure:
12520         genlmsg_cancel(msg, hdr);
12521         nlmsg_free(msg);
12522 }
12523 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
12524
12525 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
12526                                             const char *mac, gfp_t gfp)
12527 {
12528         struct wireless_dev *wdev = dev->ieee80211_ptr;
12529         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12530         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12531         void **cb;
12532
12533         if (!msg)
12534                 return NULL;
12535
12536         cb = (void **)msg->cb;
12537
12538         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
12539         if (!cb[0]) {
12540                 nlmsg_free(msg);
12541                 return NULL;
12542         }
12543
12544         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12545             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
12546                 goto nla_put_failure;
12547
12548         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
12549                 goto nla_put_failure;
12550
12551         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
12552         if (!cb[1])
12553                 goto nla_put_failure;
12554
12555         cb[2] = rdev;
12556
12557         return msg;
12558  nla_put_failure:
12559         nlmsg_free(msg);
12560         return NULL;
12561 }
12562
12563 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
12564 {
12565         void **cb = (void **)msg->cb;
12566         struct cfg80211_registered_device *rdev = cb[2];
12567
12568         nla_nest_end(msg, cb[1]);
12569         genlmsg_end(msg, cb[0]);
12570
12571         memset(msg->cb, 0, sizeof(msg->cb));
12572
12573         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12574                                 NL80211_MCGRP_MLME, gfp);
12575 }
12576
12577 void cfg80211_cqm_rssi_notify(struct net_device *dev,
12578                               enum nl80211_cqm_rssi_threshold_event rssi_event,
12579                               gfp_t gfp)
12580 {
12581         struct sk_buff *msg;
12582
12583         trace_cfg80211_cqm_rssi_notify(dev, rssi_event);
12584
12585         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
12586                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
12587                 return;
12588
12589         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12590         if (!msg)
12591                 return;
12592
12593         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
12594                         rssi_event))
12595                 goto nla_put_failure;
12596
12597         cfg80211_send_cqm(msg, gfp);
12598
12599         return;
12600
12601  nla_put_failure:
12602         nlmsg_free(msg);
12603 }
12604 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
12605
12606 void cfg80211_cqm_txe_notify(struct net_device *dev,
12607                              const u8 *peer, u32 num_packets,
12608                              u32 rate, u32 intvl, gfp_t gfp)
12609 {
12610         struct sk_buff *msg;
12611
12612         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12613         if (!msg)
12614                 return;
12615
12616         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
12617                 goto nla_put_failure;
12618
12619         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
12620                 goto nla_put_failure;
12621
12622         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
12623                 goto nla_put_failure;
12624
12625         cfg80211_send_cqm(msg, gfp);
12626         return;
12627
12628  nla_put_failure:
12629         nlmsg_free(msg);
12630 }
12631 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
12632
12633 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
12634                                  const u8 *peer, u32 num_packets, gfp_t gfp)
12635 {
12636         struct sk_buff *msg;
12637
12638         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
12639
12640         msg = cfg80211_prepare_cqm(dev, peer, gfp);
12641         if (!msg)
12642                 return;
12643
12644         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
12645                 goto nla_put_failure;
12646
12647         cfg80211_send_cqm(msg, gfp);
12648         return;
12649
12650  nla_put_failure:
12651         nlmsg_free(msg);
12652 }
12653 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
12654
12655 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
12656 {
12657         struct sk_buff *msg;
12658
12659         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
12660         if (!msg)
12661                 return;
12662
12663         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
12664                 goto nla_put_failure;
12665
12666         cfg80211_send_cqm(msg, gfp);
12667         return;
12668
12669  nla_put_failure:
12670         nlmsg_free(msg);
12671 }
12672 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
12673
12674 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
12675                                      struct net_device *netdev, const u8 *bssid,
12676                                      const u8 *replay_ctr, gfp_t gfp)
12677 {
12678         struct sk_buff *msg;
12679         struct nlattr *rekey_attr;
12680         void *hdr;
12681
12682         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12683         if (!msg)
12684                 return;
12685
12686         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
12687         if (!hdr) {
12688                 nlmsg_free(msg);
12689                 return;
12690         }
12691
12692         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12693             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12694             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
12695                 goto nla_put_failure;
12696
12697         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
12698         if (!rekey_attr)
12699                 goto nla_put_failure;
12700
12701         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
12702                     NL80211_REPLAY_CTR_LEN, replay_ctr))
12703                 goto nla_put_failure;
12704
12705         nla_nest_end(msg, rekey_attr);
12706
12707         genlmsg_end(msg, hdr);
12708
12709         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12710                                 NL80211_MCGRP_MLME, gfp);
12711         return;
12712
12713  nla_put_failure:
12714         genlmsg_cancel(msg, hdr);
12715         nlmsg_free(msg);
12716 }
12717
12718 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
12719                                const u8 *replay_ctr, gfp_t gfp)
12720 {
12721         struct wireless_dev *wdev = dev->ieee80211_ptr;
12722         struct wiphy *wiphy = wdev->wiphy;
12723         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12724
12725         trace_cfg80211_gtk_rekey_notify(dev, bssid);
12726         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
12727 }
12728 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
12729
12730 static void
12731 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
12732                                struct net_device *netdev, int index,
12733                                const u8 *bssid, bool preauth, gfp_t gfp)
12734 {
12735         struct sk_buff *msg;
12736         struct nlattr *attr;
12737         void *hdr;
12738
12739         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12740         if (!msg)
12741                 return;
12742
12743         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
12744         if (!hdr) {
12745                 nlmsg_free(msg);
12746                 return;
12747         }
12748
12749         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12750             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12751                 goto nla_put_failure;
12752
12753         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
12754         if (!attr)
12755                 goto nla_put_failure;
12756
12757         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
12758             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
12759             (preauth &&
12760              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
12761                 goto nla_put_failure;
12762
12763         nla_nest_end(msg, attr);
12764
12765         genlmsg_end(msg, hdr);
12766
12767         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12768                                 NL80211_MCGRP_MLME, gfp);
12769         return;
12770
12771  nla_put_failure:
12772         genlmsg_cancel(msg, hdr);
12773         nlmsg_free(msg);
12774 }
12775
12776 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
12777                                      const u8 *bssid, bool preauth, gfp_t gfp)
12778 {
12779         struct wireless_dev *wdev = dev->ieee80211_ptr;
12780         struct wiphy *wiphy = wdev->wiphy;
12781         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12782
12783         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
12784         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
12785 }
12786 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
12787
12788 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
12789                                      struct net_device *netdev,
12790                                      struct cfg80211_chan_def *chandef,
12791                                      gfp_t gfp,
12792                                      enum nl80211_commands notif,
12793                                      u8 count)
12794 {
12795         struct sk_buff *msg;
12796         void *hdr;
12797
12798         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12799         if (!msg)
12800                 return;
12801
12802         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
12803         if (!hdr) {
12804                 nlmsg_free(msg);
12805                 return;
12806         }
12807
12808         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
12809                 goto nla_put_failure;
12810
12811         if (nl80211_send_chandef(msg, chandef))
12812                 goto nla_put_failure;
12813
12814         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
12815             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
12816                         goto nla_put_failure;
12817
12818         genlmsg_end(msg, hdr);
12819
12820         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12821                                 NL80211_MCGRP_MLME, gfp);
12822         return;
12823
12824  nla_put_failure:
12825         genlmsg_cancel(msg, hdr);
12826         nlmsg_free(msg);
12827 }
12828
12829 void cfg80211_ch_switch_notify(struct net_device *dev,
12830                                struct cfg80211_chan_def *chandef)
12831 {
12832         struct wireless_dev *wdev = dev->ieee80211_ptr;
12833         struct wiphy *wiphy = wdev->wiphy;
12834         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12835
12836         ASSERT_WDEV_LOCK(wdev);
12837
12838         trace_cfg80211_ch_switch_notify(dev, chandef);
12839
12840         wdev->chandef = *chandef;
12841         wdev->preset_chandef = *chandef;
12842
12843         if (wdev->iftype == NL80211_IFTYPE_STATION &&
12844             !WARN_ON(!wdev->current_bss))
12845                 wdev->current_bss->pub.channel = chandef->chan;
12846
12847         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12848                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
12849 }
12850 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
12851
12852 void cfg80211_ch_switch_started_notify(struct net_device *dev,
12853                                        struct cfg80211_chan_def *chandef,
12854                                        u8 count)
12855 {
12856         struct wireless_dev *wdev = dev->ieee80211_ptr;
12857         struct wiphy *wiphy = wdev->wiphy;
12858         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12859
12860         trace_cfg80211_ch_switch_started_notify(dev, chandef);
12861
12862         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
12863                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
12864 }
12865 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
12866
12867 void
12868 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
12869                      const struct cfg80211_chan_def *chandef,
12870                      enum nl80211_radar_event event,
12871                      struct net_device *netdev, gfp_t gfp)
12872 {
12873         struct sk_buff *msg;
12874         void *hdr;
12875
12876         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12877         if (!msg)
12878                 return;
12879
12880         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
12881         if (!hdr) {
12882                 nlmsg_free(msg);
12883                 return;
12884         }
12885
12886         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
12887                 goto nla_put_failure;
12888
12889         /* NOP and radar events don't need a netdev parameter */
12890         if (netdev) {
12891                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
12892
12893                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
12894                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
12895                         goto nla_put_failure;
12896         }
12897
12898         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
12899                 goto nla_put_failure;
12900
12901         if (nl80211_send_chandef(msg, chandef))
12902                 goto nla_put_failure;
12903
12904         genlmsg_end(msg, hdr);
12905
12906         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12907                                 NL80211_MCGRP_MLME, gfp);
12908         return;
12909
12910  nla_put_failure:
12911         genlmsg_cancel(msg, hdr);
12912         nlmsg_free(msg);
12913 }
12914
12915 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
12916                            u64 cookie, bool acked, gfp_t gfp)
12917 {
12918         struct wireless_dev *wdev = dev->ieee80211_ptr;
12919         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
12920         struct sk_buff *msg;
12921         void *hdr;
12922
12923         trace_cfg80211_probe_status(dev, addr, cookie, acked);
12924
12925         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
12926
12927         if (!msg)
12928                 return;
12929
12930         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
12931         if (!hdr) {
12932                 nlmsg_free(msg);
12933                 return;
12934         }
12935
12936         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12937             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
12938             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
12939             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
12940             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
12941                 goto nla_put_failure;
12942
12943         genlmsg_end(msg, hdr);
12944
12945         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
12946                                 NL80211_MCGRP_MLME, gfp);
12947         return;
12948
12949  nla_put_failure:
12950         genlmsg_cancel(msg, hdr);
12951         nlmsg_free(msg);
12952 }
12953 EXPORT_SYMBOL(cfg80211_probe_status);
12954
12955 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
12956                                  const u8 *frame, size_t len,
12957                                  int freq, int sig_dbm)
12958 {
12959         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
12960         struct sk_buff *msg;
12961         void *hdr;
12962         struct cfg80211_beacon_registration *reg;
12963
12964         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
12965
12966         spin_lock_bh(&rdev->beacon_registrations_lock);
12967         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
12968                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
12969                 if (!msg) {
12970                         spin_unlock_bh(&rdev->beacon_registrations_lock);
12971                         return;
12972                 }
12973
12974                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
12975                 if (!hdr)
12976                         goto nla_put_failure;
12977
12978                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
12979                     (freq &&
12980                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
12981                     (sig_dbm &&
12982                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
12983                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
12984                         goto nla_put_failure;
12985
12986                 genlmsg_end(msg, hdr);
12987
12988                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
12989         }
12990         spin_unlock_bh(&rdev->beacon_registrations_lock);
12991         return;
12992
12993  nla_put_failure:
12994         spin_unlock_bh(&rdev->beacon_registrations_lock);
12995         if (hdr)
12996                 genlmsg_cancel(msg, hdr);
12997         nlmsg_free(msg);
12998 }
12999 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
13000
13001 #ifdef CONFIG_PM
13002 static int cfg80211_net_detect_results(struct sk_buff *msg,
13003                                        struct cfg80211_wowlan_wakeup *wakeup)
13004 {
13005         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
13006         struct nlattr *nl_results, *nl_match, *nl_freqs;
13007         int i, j;
13008
13009         nl_results = nla_nest_start(
13010                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
13011         if (!nl_results)
13012                 return -EMSGSIZE;
13013
13014         for (i = 0; i < nd->n_matches; i++) {
13015                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
13016
13017                 nl_match = nla_nest_start(msg, i);
13018                 if (!nl_match)
13019                         break;
13020
13021                 /* The SSID attribute is optional in nl80211, but for
13022                  * simplicity reasons it's always present in the
13023                  * cfg80211 structure.  If a driver can't pass the
13024                  * SSID, that needs to be changed.  A zero length SSID
13025                  * is still a valid SSID (wildcard), so it cannot be
13026                  * used for this purpose.
13027                  */
13028                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
13029                             match->ssid.ssid)) {
13030                         nla_nest_cancel(msg, nl_match);
13031                         goto out;
13032                 }
13033
13034                 if (match->n_channels) {
13035                         nl_freqs = nla_nest_start(
13036                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
13037                         if (!nl_freqs) {
13038                                 nla_nest_cancel(msg, nl_match);
13039                                 goto out;
13040                         }
13041
13042                         for (j = 0; j < match->n_channels; j++) {
13043                                 if (nla_put_u32(msg, j, match->channels[j])) {
13044                                         nla_nest_cancel(msg, nl_freqs);
13045                                         nla_nest_cancel(msg, nl_match);
13046                                         goto out;
13047                                 }
13048                         }
13049
13050                         nla_nest_end(msg, nl_freqs);
13051                 }
13052
13053                 nla_nest_end(msg, nl_match);
13054         }
13055
13056 out:
13057         nla_nest_end(msg, nl_results);
13058         return 0;
13059 }
13060
13061 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
13062                                    struct cfg80211_wowlan_wakeup *wakeup,
13063                                    gfp_t gfp)
13064 {
13065         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13066         struct sk_buff *msg;
13067         void *hdr;
13068         int size = 200;
13069
13070         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
13071
13072         if (wakeup)
13073                 size += wakeup->packet_present_len;
13074
13075         msg = nlmsg_new(size, gfp);
13076         if (!msg)
13077                 return;
13078
13079         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
13080         if (!hdr)
13081                 goto free_msg;
13082
13083         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13084             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13085                 goto free_msg;
13086
13087         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13088                                         wdev->netdev->ifindex))
13089                 goto free_msg;
13090
13091         if (wakeup) {
13092                 struct nlattr *reasons;
13093
13094                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
13095                 if (!reasons)
13096                         goto free_msg;
13097
13098                 if (wakeup->disconnect &&
13099                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
13100                         goto free_msg;
13101                 if (wakeup->magic_pkt &&
13102                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
13103                         goto free_msg;
13104                 if (wakeup->gtk_rekey_failure &&
13105                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
13106                         goto free_msg;
13107                 if (wakeup->eap_identity_req &&
13108                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
13109                         goto free_msg;
13110                 if (wakeup->four_way_handshake &&
13111                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
13112                         goto free_msg;
13113                 if (wakeup->rfkill_release &&
13114                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
13115                         goto free_msg;
13116
13117                 if (wakeup->pattern_idx >= 0 &&
13118                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
13119                                 wakeup->pattern_idx))
13120                         goto free_msg;
13121
13122                 if (wakeup->tcp_match &&
13123                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
13124                         goto free_msg;
13125
13126                 if (wakeup->tcp_connlost &&
13127                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
13128                         goto free_msg;
13129
13130                 if (wakeup->tcp_nomoretokens &&
13131                     nla_put_flag(msg,
13132                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
13133                         goto free_msg;
13134
13135                 if (wakeup->packet) {
13136                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
13137                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
13138
13139                         if (!wakeup->packet_80211) {
13140                                 pkt_attr =
13141                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
13142                                 len_attr =
13143                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
13144                         }
13145
13146                         if (wakeup->packet_len &&
13147                             nla_put_u32(msg, len_attr, wakeup->packet_len))
13148                                 goto free_msg;
13149
13150                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
13151                                     wakeup->packet))
13152                                 goto free_msg;
13153                 }
13154
13155                 if (wakeup->net_detect &&
13156                     cfg80211_net_detect_results(msg, wakeup))
13157                                 goto free_msg;
13158
13159                 nla_nest_end(msg, reasons);
13160         }
13161
13162         genlmsg_end(msg, hdr);
13163
13164         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13165                                 NL80211_MCGRP_MLME, gfp);
13166         return;
13167
13168  free_msg:
13169         nlmsg_free(msg);
13170 }
13171 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
13172 #endif
13173
13174 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
13175                                 enum nl80211_tdls_operation oper,
13176                                 u16 reason_code, gfp_t gfp)
13177 {
13178         struct wireless_dev *wdev = dev->ieee80211_ptr;
13179         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13180         struct sk_buff *msg;
13181         void *hdr;
13182
13183         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
13184                                          reason_code);
13185
13186         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13187         if (!msg)
13188                 return;
13189
13190         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
13191         if (!hdr) {
13192                 nlmsg_free(msg);
13193                 return;
13194         }
13195
13196         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13197             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13198             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
13199             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
13200             (reason_code > 0 &&
13201              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
13202                 goto nla_put_failure;
13203
13204         genlmsg_end(msg, hdr);
13205
13206         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13207                                 NL80211_MCGRP_MLME, gfp);
13208         return;
13209
13210  nla_put_failure:
13211         genlmsg_cancel(msg, hdr);
13212         nlmsg_free(msg);
13213 }
13214 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
13215
13216 static int nl80211_netlink_notify(struct notifier_block * nb,
13217                                   unsigned long state,
13218                                   void *_notify)
13219 {
13220         struct netlink_notify *notify = _notify;
13221         struct cfg80211_registered_device *rdev;
13222         struct wireless_dev *wdev;
13223         struct cfg80211_beacon_registration *reg, *tmp;
13224
13225         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
13226                 return NOTIFY_DONE;
13227
13228         rcu_read_lock();
13229
13230         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
13231                 bool schedule_destroy_work = false;
13232                 struct cfg80211_sched_scan_request *sched_scan_req =
13233                         rcu_dereference(rdev->sched_scan_req);
13234
13235                 if (sched_scan_req && notify->portid &&
13236                     sched_scan_req->owner_nlportid == notify->portid) {
13237                         sched_scan_req->owner_nlportid = 0;
13238
13239                         if (rdev->ops->sched_scan_stop &&
13240                             rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
13241                                 schedule_work(&rdev->sched_scan_stop_wk);
13242                 }
13243
13244                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list) {
13245                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
13246
13247                         if (wdev->owner_nlportid == notify->portid)
13248                                 schedule_destroy_work = true;
13249                 }
13250
13251                 spin_lock_bh(&rdev->beacon_registrations_lock);
13252                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
13253                                          list) {
13254                         if (reg->nlportid == notify->portid) {
13255                                 list_del(&reg->list);
13256                                 kfree(reg);
13257                                 break;
13258                         }
13259                 }
13260                 spin_unlock_bh(&rdev->beacon_registrations_lock);
13261
13262                 if (schedule_destroy_work) {
13263                         struct cfg80211_iface_destroy *destroy;
13264
13265                         destroy = kzalloc(sizeof(*destroy), GFP_ATOMIC);
13266                         if (destroy) {
13267                                 destroy->nlportid = notify->portid;
13268                                 spin_lock(&rdev->destroy_list_lock);
13269                                 list_add(&destroy->list, &rdev->destroy_list);
13270                                 spin_unlock(&rdev->destroy_list_lock);
13271                                 schedule_work(&rdev->destroy_work);
13272                         }
13273                 }
13274         }
13275
13276         rcu_read_unlock();
13277
13278         /*
13279          * It is possible that the user space process that is controlling the
13280          * indoor setting disappeared, so notify the regulatory core.
13281          */
13282         regulatory_netlink_notify(notify->portid);
13283         return NOTIFY_OK;
13284 }
13285
13286 static struct notifier_block nl80211_netlink_notifier = {
13287         .notifier_call = nl80211_netlink_notify,
13288 };
13289
13290 void cfg80211_ft_event(struct net_device *netdev,
13291                        struct cfg80211_ft_event_params *ft_event)
13292 {
13293         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
13294         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13295         struct sk_buff *msg;
13296         void *hdr;
13297
13298         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
13299
13300         if (!ft_event->target_ap)
13301                 return;
13302
13303         msg = nlmsg_new(100 + ft_event->ric_ies_len, GFP_KERNEL);
13304         if (!msg)
13305                 return;
13306
13307         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
13308         if (!hdr)
13309                 goto out;
13310
13311         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13312             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13313             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
13314                 goto out;
13315
13316         if (ft_event->ies &&
13317             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
13318                 goto out;
13319         if (ft_event->ric_ies &&
13320             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
13321                     ft_event->ric_ies))
13322                 goto out;
13323
13324         genlmsg_end(msg, hdr);
13325
13326         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13327                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13328         return;
13329  out:
13330         nlmsg_free(msg);
13331 }
13332 EXPORT_SYMBOL(cfg80211_ft_event);
13333
13334 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
13335 {
13336         struct cfg80211_registered_device *rdev;
13337         struct sk_buff *msg;
13338         void *hdr;
13339         u32 nlportid;
13340
13341         rdev = wiphy_to_rdev(wdev->wiphy);
13342         if (!rdev->crit_proto_nlportid)
13343                 return;
13344
13345         nlportid = rdev->crit_proto_nlportid;
13346         rdev->crit_proto_nlportid = 0;
13347
13348         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13349         if (!msg)
13350                 return;
13351
13352         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
13353         if (!hdr)
13354                 goto nla_put_failure;
13355
13356         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13357             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13358                 goto nla_put_failure;
13359
13360         genlmsg_end(msg, hdr);
13361
13362         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
13363         return;
13364
13365  nla_put_failure:
13366         if (hdr)
13367                 genlmsg_cancel(msg, hdr);
13368         nlmsg_free(msg);
13369
13370 }
13371 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
13372
13373 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
13374 {
13375         struct wiphy *wiphy = wdev->wiphy;
13376         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13377         struct sk_buff *msg;
13378         void *hdr;
13379
13380         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13381         if (!msg)
13382                 return;
13383
13384         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
13385         if (!hdr)
13386                 goto out;
13387
13388         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13389             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
13390             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
13391                 goto out;
13392
13393         genlmsg_end(msg, hdr);
13394
13395         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
13396                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13397         return;
13398  out:
13399         nlmsg_free(msg);
13400 }
13401
13402 /* initialisation/exit functions */
13403
13404 int nl80211_init(void)
13405 {
13406         int err;
13407
13408         err = genl_register_family_with_ops_groups(&nl80211_fam, nl80211_ops,
13409                                                    nl80211_mcgrps);
13410         if (err)
13411                 return err;
13412
13413         err = netlink_register_notifier(&nl80211_netlink_notifier);
13414         if (err)
13415                 goto err_out;
13416
13417         return 0;
13418  err_out:
13419         genl_unregister_family(&nl80211_fam);
13420         return err;
13421 }
13422
13423 void nl80211_exit(void)
13424 {
13425         netlink_unregister_notifier(&nl80211_netlink_notifier);
13426         genl_unregister_family(&nl80211_fam);
13427 }