net/wireless/sme.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SME code for cfg80211
   4  * both driver SME event handling and the SME implementation
   5  * (for nl80211's connect() and wext)
   6  *
   7  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   8  * Copyright (C) 2009, 2020, 2022 Intel Corporation. All rights reserved.
   9  * Copyright 2017       Intel Deutschland GmbH
  10  */
  11
  12 #include <linux/etherdevice.h>
  13 #include <linux/if_arp.h>
  14 #include <linux/slab.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/wireless.h>
  17 #include <linux/export.h>
  18 #include <net/iw_handler.h>
  19 #include <net/cfg80211.h>
  20 #include <net/rtnetlink.h>
  21 #include "nl80211.h"
  22 #include "reg.h"
  23 #include "rdev-ops.h"
  24
  25 /*
  26  * Software SME in cfg80211, using auth/assoc/deauth calls to the
  27  * driver. This is for implementing nl80211's connect/disconnect
  28  * and wireless extensions (if configured.)
  29  */
  30
  31 struct cfg80211_conn {
  32         struct cfg80211_connect_params params;
  33         /* these are sub-states of the _CONNECTING sme_state */
  34         enum {
  35                 CFG80211_CONN_SCANNING,
  36                 CFG80211_CONN_SCAN_AGAIN,
  37                 CFG80211_CONN_AUTHENTICATE_NEXT,
  38                 CFG80211_CONN_AUTHENTICATING,
  39                 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
  40                 CFG80211_CONN_ASSOCIATE_NEXT,
  41                 CFG80211_CONN_ASSOCIATING,
  42                 CFG80211_CONN_ASSOC_FAILED,
  43                 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
  44                 CFG80211_CONN_DEAUTH,
  45                 CFG80211_CONN_ABANDON,
  46                 CFG80211_CONN_CONNECTED,
  47         } state;
  48         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  49         const u8 *ie;
  50         size_t ie_len;
  51         bool auto_auth, prev_bssid_valid;
  52 };
  53
  54 static void cfg80211_sme_free(struct wireless_dev *wdev)
  55 {
  56         if (!wdev->conn)
  57                 return;
  58
  59         kfree(wdev->conn->ie);
  60         kfree(wdev->conn);
  61         wdev->conn = NULL;
  62 }
  63
  64 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  65 {
  66         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
  67         struct cfg80211_scan_request *request;
  68         int n_channels, err;
  69
  70         ASSERT_WDEV_LOCK(wdev);
  71
  72         if (rdev->scan_req || rdev->scan_msg)
  73                 return -EBUSY;
  74
  75         if (wdev->conn->params.channel)
  76                 n_channels = 1;
  77         else
  78                 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
  79
  80         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  81                           sizeof(request->channels[0]) * n_channels,
  82                           GFP_KERNEL);
  83         if (!request)
  84                 return -ENOMEM;
  85
  86         if (wdev->conn->params.channel) {
  87                 enum nl80211_band band = wdev->conn->params.channel->band;
  88                 struct ieee80211_supported_band *sband =
  89                         wdev->wiphy->bands[band];
  90
  91                 if (!sband) {
  92                         kfree(request);
  93                         return -EINVAL;
  94                 }
  95                 request->channels[0] = wdev->conn->params.channel;
  96                 request->rates[band] = (1 << sband->n_bitrates) - 1;
  97         } else {
  98                 int i = 0, j;
  99                 enum nl80211_band band;
 100                 struct ieee80211_supported_band *bands;
 101                 struct ieee80211_channel *channel;
 102
 103                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
 104                         bands = wdev->wiphy->bands[band];
 105                         if (!bands)
 106                                 continue;
 107                         for (j = 0; j < bands->n_channels; j++) {
 108                                 channel = &bands->channels[j];
 109                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 110                                         continue;
 111                                 request->channels[i++] = channel;
 112                         }
 113                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 114                 }
 115                 n_channels = i;
 116         }
 117         request->n_channels = n_channels;
 118         request->ssids = (void *)&request->channels[n_channels];
 119         request->n_ssids = 1;
 120
 121         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 122                 wdev->conn->params.ssid_len);
 123         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 124
 125         eth_broadcast_addr(request->bssid);
 126
 127         request->wdev = wdev;
 128         request->wiphy = &rdev->wiphy;
 129         request->scan_start = jiffies;
 130
 131         rdev->scan_req = request;
 132
 133         err = rdev_scan(rdev, request);
 134         if (!err) {
 135                 wdev->conn->state = CFG80211_CONN_SCANNING;
 136                 nl80211_send_scan_start(rdev, wdev);
 137                 dev_hold(wdev->netdev);
 138         } else {
 139                 rdev->scan_req = NULL;
 140                 kfree(request);
 141         }
 142         return err;
 143 }
 144
 145 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 146                                  enum nl80211_timeout_reason *treason)
 147 {
 148         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 149         struct cfg80211_connect_params *params;
 150         struct cfg80211_auth_request auth_req = {};
 151         struct cfg80211_assoc_request req = {};
 152         int err;
 153
 154         ASSERT_WDEV_LOCK(wdev);
 155
 156         if (!wdev->conn)
 157                 return 0;
 158
 159         params = &wdev->conn->params;
 160
 161         switch (wdev->conn->state) {
 162         case CFG80211_CONN_SCANNING:
 163                 /* didn't find it during scan ... */
 164                 return -ENOENT;
 165         case CFG80211_CONN_SCAN_AGAIN:
 166                 return cfg80211_conn_scan(wdev);
 167         case CFG80211_CONN_AUTHENTICATE_NEXT:
 168                 if (WARN_ON(!rdev->ops->auth))
 169                         return -EOPNOTSUPP;
 170                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 171                 auth_req.key = params->key;
 172                 auth_req.key_len = params->key_len;
 173                 auth_req.key_idx = params->key_idx;
 174                 auth_req.auth_type = params->auth_type;
 175                 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 176                                                 params->bssid,
 177                                                 params->ssid, params->ssid_len,
 178                                                 IEEE80211_BSS_TYPE_ESS,
 179                                                 IEEE80211_PRIVACY_ANY);
 180                 auth_req.link_id = -1;
 181                 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
 182                 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
 183                 return err;
 184         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 185                 *treason = NL80211_TIMEOUT_AUTH;
 186                 return -ENOTCONN;
 187         case CFG80211_CONN_ASSOCIATE_NEXT:
 188                 if (WARN_ON(!rdev->ops->assoc))
 189                         return -EOPNOTSUPP;
 190                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 191                 if (wdev->conn->prev_bssid_valid)
 192                         req.prev_bssid = wdev->conn->prev_bssid;
 193                 req.ie = params->ie;
 194                 req.ie_len = params->ie_len;
 195                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 196                 req.crypto = params->crypto;
 197                 req.flags = params->flags;
 198                 req.ht_capa = params->ht_capa;
 199                 req.ht_capa_mask = params->ht_capa_mask;
 200                 req.vht_capa = params->vht_capa;
 201                 req.vht_capa_mask = params->vht_capa_mask;
 202                 req.link_id = -1;
 203
 204                 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 205                                            params->bssid,
 206                                            params->ssid, params->ssid_len,
 207                                            IEEE80211_BSS_TYPE_ESS,
 208                                            IEEE80211_PRIVACY_ANY);
 209                 if (!req.bss) {
 210                         err = -ENOENT;
 211                 } else {
 212                         err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req);
 213                         cfg80211_put_bss(&rdev->wiphy, req.bss);
 214                 }
 215
 216                 if (err)
 217                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 218                                              NULL, 0,
 219                                              WLAN_REASON_DEAUTH_LEAVING,
 220                                              false);
 221                 return err;
 222         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 223                 *treason = NL80211_TIMEOUT_ASSOC;
 224                 fallthrough;
 225         case CFG80211_CONN_ASSOC_FAILED:
 226                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 227                                      NULL, 0,
 228                                      WLAN_REASON_DEAUTH_LEAVING, false);
 229                 return -ENOTCONN;
 230         case CFG80211_CONN_DEAUTH:
 231                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 232                                      NULL, 0,
 233                                      WLAN_REASON_DEAUTH_LEAVING, false);
 234                 fallthrough;
 235         case CFG80211_CONN_ABANDON:
 236                 /* free directly, disconnected event already sent */
 237                 cfg80211_sme_free(wdev);
 238                 return 0;
 239         default:
 240                 return 0;
 241         }
 242 }
 243
 244 void cfg80211_conn_work(struct work_struct *work)
 245 {
 246         struct cfg80211_registered_device *rdev =
 247                 container_of(work, struct cfg80211_registered_device, conn_work);
 248         struct wireless_dev *wdev;
 249         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 250         enum nl80211_timeout_reason treason;
 251
 252         wiphy_lock(&rdev->wiphy);
 253
 254         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 255                 if (!wdev->netdev)
 256                         continue;
 257
 258                 wdev_lock(wdev);
 259                 if (!netif_running(wdev->netdev)) {
 260                         wdev_unlock(wdev);
 261                         continue;
 262                 }
 263                 if (!wdev->conn ||
 264                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
 265                         wdev_unlock(wdev);
 266                         continue;
 267                 }
 268                 if (wdev->conn->params.bssid) {
 269                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 270                         bssid = bssid_buf;
 271                 }
 272                 treason = NL80211_TIMEOUT_UNSPECIFIED;
 273                 if (cfg80211_conn_do_work(wdev, &treason)) {
 274                         struct cfg80211_connect_resp_params cr;
 275
 276                         memset(&cr, 0, sizeof(cr));
 277                         cr.status = -1;
 278                         cr.links[0].bssid = bssid;
 279                         cr.timeout_reason = treason;
 280                         __cfg80211_connect_result(wdev->netdev, &cr, false);
 281                 }
 282                 wdev_unlock(wdev);
 283         }
 284
 285         wiphy_unlock(&rdev->wiphy);
 286 }
 287
 288 /* Returned bss is reference counted and must be cleaned up appropriately. */
 289 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 290 {
 291         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 292         struct cfg80211_bss *bss;
 293
 294         ASSERT_WDEV_LOCK(wdev);
 295
 296         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 297                                wdev->conn->params.bssid,
 298                                wdev->conn->params.ssid,
 299                                wdev->conn->params.ssid_len,
 300                                wdev->conn_bss_type,
 301                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 302         if (!bss)
 303                 return NULL;
 304
 305         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 306         wdev->conn->params.bssid = wdev->conn->bssid;
 307         wdev->conn->params.channel = bss->channel;
 308         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 309         schedule_work(&rdev->conn_work);
 310
 311         return bss;
 312 }
 313
 314 static void __cfg80211_sme_scan_done(struct net_device *dev)
 315 {
 316         struct wireless_dev *wdev = dev->ieee80211_ptr;
 317         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 318         struct cfg80211_bss *bss;
 319
 320         ASSERT_WDEV_LOCK(wdev);
 321
 322         if (!wdev->conn)
 323                 return;
 324
 325         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 326             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 327                 return;
 328
 329         bss = cfg80211_get_conn_bss(wdev);
 330         if (bss)
 331                 cfg80211_put_bss(&rdev->wiphy, bss);
 332         else
 333                 schedule_work(&rdev->conn_work);
 334 }
 335
 336 void cfg80211_sme_scan_done(struct net_device *dev)
 337 {
 338         struct wireless_dev *wdev = dev->ieee80211_ptr;
 339
 340         wdev_lock(wdev);
 341         __cfg80211_sme_scan_done(dev);
 342         wdev_unlock(wdev);
 343 }
 344
 345 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 346 {
 347         struct wiphy *wiphy = wdev->wiphy;
 348         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 349         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 350         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 351
 352         ASSERT_WDEV_LOCK(wdev);
 353
 354         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 355                 return;
 356
 357         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 358             wdev->conn->auto_auth &&
 359             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 360                 /* select automatically between only open, shared, leap */
 361                 switch (wdev->conn->params.auth_type) {
 362                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 363                         if (wdev->connect_keys)
 364                                 wdev->conn->params.auth_type =
 365                                         NL80211_AUTHTYPE_SHARED_KEY;
 366                         else
 367                                 wdev->conn->params.auth_type =
 368                                         NL80211_AUTHTYPE_NETWORK_EAP;
 369                         break;
 370                 case NL80211_AUTHTYPE_SHARED_KEY:
 371                         wdev->conn->params.auth_type =
 372                                 NL80211_AUTHTYPE_NETWORK_EAP;
 373                         break;
 374                 default:
 375                         /* huh? */
 376                         wdev->conn->params.auth_type =
 377                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 378                         break;
 379                 }
 380                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 381                 schedule_work(&rdev->conn_work);
 382         } else if (status_code != WLAN_STATUS_SUCCESS) {
 383                 struct cfg80211_connect_resp_params cr;
 384
 385                 memset(&cr, 0, sizeof(cr));
 386                 cr.status = status_code;
 387                 cr.links[0].bssid = mgmt->bssid;
 388                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 389                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 390         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 391                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 392                 schedule_work(&rdev->conn_work);
 393         }
 394 }
 395
 396 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 397 {
 398         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 399
 400         if (!wdev->conn)
 401                 return false;
 402
 403         if (status == WLAN_STATUS_SUCCESS) {
 404                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 405                 return false;
 406         }
 407
 408         if (wdev->conn->prev_bssid_valid) {
 409                 /*
 410                  * Some stupid APs don't accept reassoc, so we
 411                  * need to fall back to trying regular assoc;
 412                  * return true so no event is sent to userspace.
 413                  */
 414                 wdev->conn->prev_bssid_valid = false;
 415                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 416                 schedule_work(&rdev->conn_work);
 417                 return true;
 418         }
 419
 420         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 421         schedule_work(&rdev->conn_work);
 422         return false;
 423 }
 424
 425 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 426 {
 427         cfg80211_sme_free(wdev);
 428 }
 429
 430 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 431 {
 432         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 433
 434         if (!wdev->conn)
 435                 return;
 436
 437         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 438         schedule_work(&rdev->conn_work);
 439 }
 440
 441 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 442 {
 443         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 444
 445         if (!wdev->conn)
 446                 return;
 447
 448         wdev->conn->state = CFG80211_CONN_DEAUTH;
 449         schedule_work(&rdev->conn_work);
 450 }
 451
 452 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 453 {
 454         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 455
 456         if (!wdev->conn)
 457                 return;
 458
 459         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 460         schedule_work(&rdev->conn_work);
 461 }
 462
 463 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 464 {
 465         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 466
 467         if (!wdev->conn)
 468                 return;
 469
 470         wdev->conn->state = CFG80211_CONN_ABANDON;
 471         schedule_work(&rdev->conn_work);
 472 }
 473
 474 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
 475 {
 476         unsigned int link;
 477
 478         for_each_valid_link(wdev, link) {
 479                 if (!wdev->links[link].client.current_bss)
 480                         continue;
 481                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 482                 cfg80211_put_bss(wdev->wiphy,
 483                                  &wdev->links[link].client.current_bss->pub);
 484                 wdev->links[link].client.current_bss = NULL;
 485         }
 486 }
 487
 488 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 489                                      const u8 *ies, size_t ies_len,
 490                                      const u8 **out_ies, size_t *out_ies_len)
 491 {
 492         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 493         u8 *buf;
 494         size_t offs;
 495
 496         if (!rdev->wiphy.extended_capabilities_len ||
 497             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 498                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 499                 if (!*out_ies)
 500                         return -ENOMEM;
 501                 *out_ies_len = ies_len;
 502                 return 0;
 503         }
 504
 505         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 506                       GFP_KERNEL);
 507         if (!buf)
 508                 return -ENOMEM;
 509
 510         if (ies_len) {
 511                 static const u8 before_extcapa[] = {
 512                         /* not listing IEs expected to be created by driver */
 513                         WLAN_EID_RSN,
 514                         WLAN_EID_QOS_CAPA,
 515                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 516                         WLAN_EID_MOBILITY_DOMAIN,
 517                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 518                         WLAN_EID_BSS_COEX_2040,
 519                 };
 520
 521                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 522                                           ARRAY_SIZE(before_extcapa), 0);
 523                 memcpy(buf, ies, offs);
 524                 /* leave a whole for extended capabilities IE */
 525                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 526                        ies + offs, ies_len - offs);
 527         } else {
 528                 offs = 0;
 529         }
 530
 531         /* place extended capabilities IE (with only driver capabilities) */
 532         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 533         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 534         memcpy(buf + offs + 2,
 535                rdev->wiphy.extended_capabilities,
 536                rdev->wiphy.extended_capabilities_len);
 537
 538         *out_ies = buf;
 539         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 540
 541         return 0;
 542 }
 543
 544 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 545                                 struct cfg80211_connect_params *connect,
 546                                 const u8 *prev_bssid)
 547 {
 548         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 549         struct cfg80211_bss *bss;
 550         int err;
 551
 552         if (!rdev->ops->auth || !rdev->ops->assoc)
 553                 return -EOPNOTSUPP;
 554
 555         cfg80211_wdev_release_bsses(wdev);
 556
 557         if (wdev->connected) {
 558                 cfg80211_sme_free(wdev);
 559                 wdev->connected = false;
 560         }
 561
 562         if (wdev->conn)
 563                 return -EINPROGRESS;
 564
 565         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 566         if (!wdev->conn)
 567                 return -ENOMEM;
 568
 569         /*
 570          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 571          */
 572         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 573         if (connect->bssid) {
 574                 wdev->conn->params.bssid = wdev->conn->bssid;
 575                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 576         }
 577
 578         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 579                                       &wdev->conn->ie,
 580                                       &wdev->conn->params.ie_len)) {
 581                 kfree(wdev->conn);
 582                 wdev->conn = NULL;
 583                 return -ENOMEM;
 584         }
 585         wdev->conn->params.ie = wdev->conn->ie;
 586
 587         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 588                 wdev->conn->auto_auth = true;
 589                 /* start with open system ... should mostly work */
 590                 wdev->conn->params.auth_type =
 591                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 592         } else {
 593                 wdev->conn->auto_auth = false;
 594         }
 595
 596         wdev->conn->params.ssid = wdev->u.client.ssid;
 597         wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
 598
 599         /* see if we have the bss already */
 600         bss = cfg80211_get_conn_bss(wdev);
 601
 602         if (prev_bssid) {
 603                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 604                 wdev->conn->prev_bssid_valid = true;
 605         }
 606
 607         /* we're good if we have a matching bss struct */
 608         if (bss) {
 609                 enum nl80211_timeout_reason treason;
 610
 611                 err = cfg80211_conn_do_work(wdev, &treason);
 612                 cfg80211_put_bss(wdev->wiphy, bss);
 613         } else {
 614                 /* otherwise we'll need to scan for the AP first */
 615                 err = cfg80211_conn_scan(wdev);
 616
 617                 /*
 618                  * If we can't scan right now, then we need to scan again
 619                  * after the current scan finished, since the parameters
 620                  * changed (unless we find a good AP anyway).
 621                  */
 622                 if (err == -EBUSY) {
 623                         err = 0;
 624                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 625                 }
 626         }
 627
 628         if (err)
 629                 cfg80211_sme_free(wdev);
 630
 631         return err;
 632 }
 633
 634 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 635 {
 636         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 637         int err;
 638
 639         if (!wdev->conn)
 640                 return 0;
 641
 642         if (!rdev->ops->deauth)
 643                 return -EOPNOTSUPP;
 644
 645         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 646             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 647                 err = 0;
 648                 goto out;
 649         }
 650
 651         /* wdev->conn->params.bssid must be set if > SCANNING */
 652         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 653                                    wdev->conn->params.bssid,
 654                                    NULL, 0, reason, false);
 655  out:
 656         cfg80211_sme_free(wdev);
 657         return err;
 658 }
 659
 660 /*
 661  * code shared for in-device and software SME
 662  */
 663
 664 static bool cfg80211_is_all_idle(void)
 665 {
 666         struct cfg80211_registered_device *rdev;
 667         struct wireless_dev *wdev;
 668         bool is_all_idle = true;
 669
 670         /*
 671          * All devices must be idle as otherwise if you are actively
 672          * scanning some new beacon hints could be learned and would
 673          * count as new regulatory hints.
 674          * Also if there is any other active beaconing interface we
 675          * need not issue a disconnect hint and reset any info such
 676          * as chan dfs state, etc.
 677          */
 678         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 679                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 680                         wdev_lock(wdev);
 681                         if (wdev->conn || wdev->connected ||
 682                             cfg80211_beaconing_iface_active(wdev))
 683                                 is_all_idle = false;
 684                         wdev_unlock(wdev);
 685                 }
 686         }
 687
 688         return is_all_idle;
 689 }
 690
 691 static void disconnect_work(struct work_struct *work)
 692 {
 693         rtnl_lock();
 694         if (cfg80211_is_all_idle())
 695                 regulatory_hint_disconnect();
 696         rtnl_unlock();
 697 }
 698
 699 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 700
 701 static void
 702 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
 703                                       struct cfg80211_connect_resp_params *cr)
 704 {
 705         unsigned int link;
 706
 707         for_each_valid_link(cr, link) {
 708                 if (!cr->links[link].bss)
 709                         continue;
 710                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 711                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 712         }
 713 }
 714
 715 /*
 716  * API calls for drivers implementing connect/disconnect and
 717  * SME event handling
 718  */
 719
 720 /* This method must consume bss one way or another */
 721 void __cfg80211_connect_result(struct net_device *dev,
 722                                struct cfg80211_connect_resp_params *cr,
 723                                bool wextev)
 724 {
 725         struct wireless_dev *wdev = dev->ieee80211_ptr;
 726         const struct element *country_elem = NULL;
 727         const u8 *country_data;
 728         u8 country_datalen;
 729 #ifdef CONFIG_CFG80211_WEXT
 730         union iwreq_data wrqu;
 731 #endif
 732         unsigned int link;
 733         const u8 *connected_addr;
 734         bool bss_not_found = false;
 735
 736         ASSERT_WDEV_LOCK(wdev);
 737
 738         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 739                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 740                 goto out;
 741
 742         if (cr->valid_links) {
 743                 if (WARN_ON(!cr->ap_mld_addr))
 744                         goto out;
 745
 746                 for_each_valid_link(cr, link) {
 747                         if (WARN_ON(!cr->links[link].addr))
 748                                 goto out;
 749                 }
 750         }
 751
 752         wdev->unprot_beacon_reported = 0;
 753         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 754                                     GFP_KERNEL);
 755         connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
 756
 757 #ifdef CONFIG_CFG80211_WEXT
 758         if (wextev && !cr->valid_links) {
 759                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 760                         memset(&wrqu, 0, sizeof(wrqu));
 761                         wrqu.data.length = cr->req_ie_len;
 762                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 763                                             cr->req_ie);
 764                 }
 765
 766                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 767                         memset(&wrqu, 0, sizeof(wrqu));
 768                         wrqu.data.length = cr->resp_ie_len;
 769                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 770                                             cr->resp_ie);
 771                 }
 772
 773                 memset(&wrqu, 0, sizeof(wrqu));
 774                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 775                 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
 776                         memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
 777                         memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
 778                         wdev->wext.prev_bssid_valid = true;
 779                 }
 780                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 781         }
 782 #endif
 783
 784         if (cr->status == WLAN_STATUS_SUCCESS) {
 785                 for_each_valid_link(cr, link) {
 786                         if (WARN_ON_ONCE(!cr->links[link].bss))
 787                                 break;
 788                 }
 789
 790                 for_each_valid_link(cr, link) {
 791                         if (cr->links[link].bss)
 792                                 continue;
 793
 794                         cr->links[link].bss =
 795                                 cfg80211_get_bss(wdev->wiphy, NULL,
 796                                                  cr->links[link].bssid,
 797                                                  wdev->u.client.ssid,
 798                                                  wdev->u.client.ssid_len,
 799                                                  wdev->conn_bss_type,
 800                                                  IEEE80211_PRIVACY_ANY);
 801                         if (!cr->links[link].bss) {
 802                                 bss_not_found = true;
 803                                 break;
 804                         }
 805                         cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
 806                 }
 807         }
 808
 809         cfg80211_wdev_release_bsses(wdev);
 810
 811         if (cr->status != WLAN_STATUS_SUCCESS) {
 812                 kfree_sensitive(wdev->connect_keys);
 813                 wdev->connect_keys = NULL;
 814                 wdev->u.client.ssid_len = 0;
 815                 wdev->conn_owner_nlportid = 0;
 816                 cfg80211_connect_result_release_bsses(wdev, cr);
 817                 cfg80211_sme_free(wdev);
 818                 return;
 819         }
 820
 821         if (WARN_ON(bss_not_found)) {
 822                 cfg80211_connect_result_release_bsses(wdev, cr);
 823                 return;
 824         }
 825
 826         memset(wdev->links, 0, sizeof(wdev->links));
 827         wdev->valid_links = cr->valid_links;
 828         for_each_valid_link(cr, link)
 829                 wdev->links[link].client.current_bss =
 830                         bss_from_pub(cr->links[link].bss);
 831         wdev->connected = true;
 832         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
 833         if (cr->valid_links) {
 834                 for_each_valid_link(cr, link)
 835                         memcpy(wdev->links[link].addr, cr->links[link].addr,
 836                                ETH_ALEN);
 837         }
 838
 839         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 840                 cfg80211_upload_connect_keys(wdev);
 841
 842         rcu_read_lock();
 843         for_each_valid_link(cr, link) {
 844                 country_elem =
 845                         ieee80211_bss_get_elem(cr->links[link].bss,
 846                                                WLAN_EID_COUNTRY);
 847                 if (country_elem)
 848                         break;
 849         }
 850         if (!country_elem) {
 851                 rcu_read_unlock();
 852                 return;
 853         }
 854
 855         country_datalen = country_elem->datalen;
 856         country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
 857         rcu_read_unlock();
 858
 859         if (!country_data)
 860                 return;
 861
 862         regulatory_hint_country_ie(wdev->wiphy,
 863                                    cr->links[link].bss->channel->band,
 864                                    country_data, country_datalen);
 865         kfree(country_data);
 866
 867         return;
 868 out:
 869         for_each_valid_link(cr, link)
 870                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 871 }
 872
 873 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
 874                                      struct cfg80211_bss **bss)
 875 {
 876         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 877         struct cfg80211_internal_bss *ibss;
 878
 879         if (!*bss)
 880                 return;
 881
 882         ibss = bss_from_pub(*bss);
 883         if (list_empty(&ibss->list)) {
 884                 struct cfg80211_bss *found = NULL, *tmp = *bss;
 885
 886                 found = cfg80211_get_bss(wdev->wiphy, NULL,
 887                                          (*bss)->bssid,
 888                                          wdev->u.client.ssid,
 889                                          wdev->u.client.ssid_len,
 890                                          wdev->conn_bss_type,
 891                                          IEEE80211_PRIVACY_ANY);
 892                 if (found) {
 893                         /* The same BSS is already updated so use it
 894                          * instead, as it has latest info.
 895                          */
 896                         *bss = found;
 897                 } else {
 898                         /* Update with BSS provided by driver, it will
 899                          * be freshly added and ref cnted, we can free
 900                          * the old one.
 901                          *
 902                          * signal_valid can be false, as we are not
 903                          * expecting the BSS to be found.
 904                          *
 905                          * keep the old timestamp to avoid confusion
 906                          */
 907                         cfg80211_bss_update(rdev, ibss, false,
 908                                             ibss->ts);
 909                 }
 910
 911                 cfg80211_put_bss(wdev->wiphy, tmp);
 912         }
 913 }
 914
 915 /* Consumes bss object(s) one way or another */
 916 void cfg80211_connect_done(struct net_device *dev,
 917                            struct cfg80211_connect_resp_params *params,
 918                            gfp_t gfp)
 919 {
 920         struct wireless_dev *wdev = dev->ieee80211_ptr;
 921         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 922         struct cfg80211_event *ev;
 923         unsigned long flags;
 924         u8 *next;
 925         size_t link_info_size = 0;
 926         unsigned int link;
 927
 928         for_each_valid_link(params, link) {
 929                 cfg80211_update_link_bss(wdev, &params->links[link].bss);
 930                 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
 931                 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
 932         }
 933
 934         ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
 935                      params->req_ie_len + params->resp_ie_len +
 936                      params->fils.kek_len + params->fils.pmk_len +
 937                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
 938                      gfp);
 939
 940         if (!ev) {
 941                 for_each_valid_link(params, link)
 942                         cfg80211_put_bss(wdev->wiphy,
 943                                          params->links[link].bss);
 944                 return;
 945         }
 946
 947         ev->type = EVENT_CONNECT_RESULT;
 948         next = ((u8 *)ev) + sizeof(*ev);
 949         if (params->ap_mld_addr) {
 950                 ev->cr.ap_mld_addr = next;
 951                 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
 952                        ETH_ALEN);
 953                 next += ETH_ALEN;
 954         }
 955         if (params->req_ie_len) {
 956                 ev->cr.req_ie = next;
 957                 ev->cr.req_ie_len = params->req_ie_len;
 958                 memcpy((void *)ev->cr.req_ie, params->req_ie,
 959                        params->req_ie_len);
 960                 next += params->req_ie_len;
 961         }
 962         if (params->resp_ie_len) {
 963                 ev->cr.resp_ie = next;
 964                 ev->cr.resp_ie_len = params->resp_ie_len;
 965                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
 966                        params->resp_ie_len);
 967                 next += params->resp_ie_len;
 968         }
 969         if (params->fils.kek_len) {
 970                 ev->cr.fils.kek = next;
 971                 ev->cr.fils.kek_len = params->fils.kek_len;
 972                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
 973                        params->fils.kek_len);
 974                 next += params->fils.kek_len;
 975         }
 976         if (params->fils.pmk_len) {
 977                 ev->cr.fils.pmk = next;
 978                 ev->cr.fils.pmk_len = params->fils.pmk_len;
 979                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
 980                        params->fils.pmk_len);
 981                 next += params->fils.pmk_len;
 982         }
 983         if (params->fils.pmkid) {
 984                 ev->cr.fils.pmkid = next;
 985                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
 986                        WLAN_PMKID_LEN);
 987                 next += WLAN_PMKID_LEN;
 988         }
 989         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
 990         if (params->fils.update_erp_next_seq_num)
 991                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
 992         ev->cr.valid_links = params->valid_links;
 993         for_each_valid_link(params, link) {
 994                 if (params->links[link].bss)
 995                         cfg80211_hold_bss(
 996                                 bss_from_pub(params->links[link].bss));
 997                 ev->cr.links[link].bss = params->links[link].bss;
 998
 999                 if (params->links[link].addr) {
1000                         ev->cr.links[link].addr = next;
1001                         memcpy((void *)ev->cr.links[link].addr,
1002                                params->links[link].addr,
1003                                ETH_ALEN);
1004                         next += ETH_ALEN;
1005                 }
1006                 if (params->links[link].bssid) {
1007                         ev->cr.links[link].bssid = next;
1008                         memcpy((void *)ev->cr.links[link].bssid,
1009                                params->links[link].bssid,
1010                                ETH_ALEN);
1011                         next += ETH_ALEN;
1012                 }
1013         }
1014         ev->cr.status = params->status;
1015         ev->cr.timeout_reason = params->timeout_reason;
1016
1017         spin_lock_irqsave(&wdev->event_lock, flags);
1018         list_add_tail(&ev->list, &wdev->event_list);
1019         spin_unlock_irqrestore(&wdev->event_lock, flags);
1020         queue_work(cfg80211_wq, &rdev->event_work);
1021 }
1022 EXPORT_SYMBOL(cfg80211_connect_done);
1023
1024 /* Consumes bss object one way or another */
1025 void __cfg80211_roamed(struct wireless_dev *wdev,
1026                        struct cfg80211_roam_info *info)
1027 {
1028 #ifdef CONFIG_CFG80211_WEXT
1029         union iwreq_data wrqu;
1030 #endif
1031         unsigned int link;
1032         const u8 *connected_addr;
1033
1034         ASSERT_WDEV_LOCK(wdev);
1035
1036         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1037                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1038                 goto out;
1039
1040         if (WARN_ON(!wdev->connected))
1041                 goto out;
1042
1043         if (info->valid_links) {
1044                 if (WARN_ON(!info->ap_mld_addr))
1045                         goto out;
1046
1047                 for_each_valid_link(info, link) {
1048                         if (WARN_ON(!info->links[link].addr))
1049                                 goto out;
1050                 }
1051         }
1052
1053         cfg80211_wdev_release_bsses(wdev);
1054
1055         for_each_valid_link(info, link) {
1056                 if (WARN_ON(!info->links[link].bss))
1057                         goto out;
1058         }
1059
1060         memset(wdev->links, 0, sizeof(wdev->links));
1061         wdev->valid_links = info->valid_links;
1062         for_each_valid_link(info, link) {
1063                 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1064                 wdev->links[link].client.current_bss =
1065                         bss_from_pub(info->links[link].bss);
1066         }
1067
1068         connected_addr = info->valid_links ?
1069                          info->ap_mld_addr :
1070                          info->links[0].bss->bssid;
1071         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1072         if (info->valid_links) {
1073                 for_each_valid_link(info, link)
1074                         memcpy(wdev->links[link].addr, info->links[link].addr,
1075                                ETH_ALEN);
1076         }
1077         wdev->unprot_beacon_reported = 0;
1078         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1079                             wdev->netdev, info, GFP_KERNEL);
1080
1081 #ifdef CONFIG_CFG80211_WEXT
1082         if (!info->valid_links) {
1083                 if (info->req_ie) {
1084                         memset(&wrqu, 0, sizeof(wrqu));
1085                         wrqu.data.length = info->req_ie_len;
1086                         wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1087                                             &wrqu, info->req_ie);
1088                 }
1089
1090                 if (info->resp_ie) {
1091                         memset(&wrqu, 0, sizeof(wrqu));
1092                         wrqu.data.length = info->resp_ie_len;
1093                         wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1094                                             &wrqu, info->resp_ie);
1095                 }
1096
1097                 memset(&wrqu, 0, sizeof(wrqu));
1098                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1099                 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1100                 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1101                 wdev->wext.prev_bssid_valid = true;
1102                 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1103         }
1104 #endif
1105
1106         return;
1107 out:
1108         for_each_valid_link(info, link)
1109                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1110 }
1111
1112 /* Consumes info->links.bss object(s) one way or another */
1113 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1114                      gfp_t gfp)
1115 {
1116         struct wireless_dev *wdev = dev->ieee80211_ptr;
1117         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1118         struct cfg80211_event *ev;
1119         unsigned long flags;
1120         u8 *next;
1121         unsigned int link;
1122         size_t link_info_size = 0;
1123         bool bss_not_found = false;
1124
1125         for_each_valid_link(info, link) {
1126                 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1127                 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1128
1129                 if (info->links[link].bss)
1130                         continue;
1131
1132                 info->links[link].bss =
1133                         cfg80211_get_bss(wdev->wiphy,
1134                                          info->links[link].channel,
1135                                          info->links[link].bssid,
1136                                          wdev->u.client.ssid,
1137                                          wdev->u.client.ssid_len,
1138                                          wdev->conn_bss_type,
1139                                          IEEE80211_PRIVACY_ANY);
1140
1141                 if (!info->links[link].bss) {
1142                         bss_not_found = true;
1143                         break;
1144                 }
1145         }
1146
1147         if (WARN_ON(bss_not_found))
1148                 goto out;
1149
1150         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1151                      info->fils.kek_len + info->fils.pmk_len +
1152                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1153                      (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1154         if (!ev)
1155                 goto out;
1156
1157         ev->type = EVENT_ROAMED;
1158         next = ((u8 *)ev) + sizeof(*ev);
1159         if (info->req_ie_len) {
1160                 ev->rm.req_ie = next;
1161                 ev->rm.req_ie_len = info->req_ie_len;
1162                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1163                 next += info->req_ie_len;
1164         }
1165         if (info->resp_ie_len) {
1166                 ev->rm.resp_ie = next;
1167                 ev->rm.resp_ie_len = info->resp_ie_len;
1168                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1169                        info->resp_ie_len);
1170                 next += info->resp_ie_len;
1171         }
1172         if (info->fils.kek_len) {
1173                 ev->rm.fils.kek = next;
1174                 ev->rm.fils.kek_len = info->fils.kek_len;
1175                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1176                        info->fils.kek_len);
1177                 next += info->fils.kek_len;
1178         }
1179         if (info->fils.pmk_len) {
1180                 ev->rm.fils.pmk = next;
1181                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1182                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1183                        info->fils.pmk_len);
1184                 next += info->fils.pmk_len;
1185         }
1186         if (info->fils.pmkid) {
1187                 ev->rm.fils.pmkid = next;
1188                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1189                        WLAN_PMKID_LEN);
1190                 next += WLAN_PMKID_LEN;
1191         }
1192         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1193         if (info->fils.update_erp_next_seq_num)
1194                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1195         if (info->ap_mld_addr) {
1196                 ev->rm.ap_mld_addr = next;
1197                 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1198                        ETH_ALEN);
1199                 next += ETH_ALEN;
1200         }
1201         ev->rm.valid_links = info->valid_links;
1202         for_each_valid_link(info, link) {
1203                 ev->rm.links[link].bss = info->links[link].bss;
1204
1205                 if (info->links[link].addr) {
1206                         ev->rm.links[link].addr = next;
1207                         memcpy((void *)ev->rm.links[link].addr,
1208                                info->links[link].addr,
1209                                ETH_ALEN);
1210                         next += ETH_ALEN;
1211                 }
1212
1213                 if (info->links[link].bssid) {
1214                         ev->rm.links[link].bssid = next;
1215                         memcpy((void *)ev->rm.links[link].bssid,
1216                                info->links[link].bssid,
1217                                ETH_ALEN);
1218                         next += ETH_ALEN;
1219                 }
1220         }
1221
1222         spin_lock_irqsave(&wdev->event_lock, flags);
1223         list_add_tail(&ev->list, &wdev->event_list);
1224         spin_unlock_irqrestore(&wdev->event_lock, flags);
1225         queue_work(cfg80211_wq, &rdev->event_work);
1226
1227         return;
1228 out:
1229         for_each_valid_link(info, link)
1230                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1231
1232 }
1233 EXPORT_SYMBOL(cfg80211_roamed);
1234
1235 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1236 {
1237         ASSERT_WDEV_LOCK(wdev);
1238
1239         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1240                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1241                 return;
1242
1243         if (WARN_ON(!wdev->connected) ||
1244             WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid)))
1245                 return;
1246
1247         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1248                                      bssid);
1249 }
1250
1251 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1252                               gfp_t gfp)
1253 {
1254         struct wireless_dev *wdev = dev->ieee80211_ptr;
1255         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1256         struct cfg80211_event *ev;
1257         unsigned long flags;
1258
1259         if (WARN_ON(!bssid))
1260                 return;
1261
1262         ev = kzalloc(sizeof(*ev), gfp);
1263         if (!ev)
1264                 return;
1265
1266         ev->type = EVENT_PORT_AUTHORIZED;
1267         memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1268
1269         /*
1270          * Use the wdev event list so that if there are pending
1271          * connected/roamed events, they will be reported first.
1272          */
1273         spin_lock_irqsave(&wdev->event_lock, flags);
1274         list_add_tail(&ev->list, &wdev->event_list);
1275         spin_unlock_irqrestore(&wdev->event_lock, flags);
1276         queue_work(cfg80211_wq, &rdev->event_work);
1277 }
1278 EXPORT_SYMBOL(cfg80211_port_authorized);
1279
1280 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1281                              size_t ie_len, u16 reason, bool from_ap)
1282 {
1283         struct wireless_dev *wdev = dev->ieee80211_ptr;
1284         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1285         int i;
1286 #ifdef CONFIG_CFG80211_WEXT
1287         union iwreq_data wrqu;
1288 #endif
1289
1290         ASSERT_WDEV_LOCK(wdev);
1291
1292         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1293                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1294                 return;
1295
1296         cfg80211_wdev_release_bsses(wdev);
1297         wdev->connected = false;
1298         wdev->u.client.ssid_len = 0;
1299         wdev->conn_owner_nlportid = 0;
1300         kfree_sensitive(wdev->connect_keys);
1301         wdev->connect_keys = NULL;
1302
1303         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1304
1305         /* stop critical protocol if supported */
1306         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1307                 rdev->crit_proto_nlportid = 0;
1308                 rdev_crit_proto_stop(rdev, wdev);
1309         }
1310
1311         /*
1312          * Delete all the keys ... pairwise keys can't really
1313          * exist any more anyway, but default keys might.
1314          */
1315         if (rdev->ops->del_key) {
1316                 int max_key_idx = 5;
1317
1318                 if (wiphy_ext_feature_isset(
1319                             wdev->wiphy,
1320                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1321                     wiphy_ext_feature_isset(
1322                             wdev->wiphy,
1323                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1324                         max_key_idx = 7;
1325                 for (i = 0; i <= max_key_idx; i++)
1326                         rdev_del_key(rdev, dev, i, false, NULL);
1327         }
1328
1329         rdev_set_qos_map(rdev, dev, NULL);
1330
1331 #ifdef CONFIG_CFG80211_WEXT
1332         memset(&wrqu, 0, sizeof(wrqu));
1333         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1334         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1335         wdev->wext.connect.ssid_len = 0;
1336 #endif
1337
1338         schedule_work(&cfg80211_disconnect_work);
1339 }
1340
1341 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1342                            const u8 *ie, size_t ie_len,
1343                            bool locally_generated, gfp_t gfp)
1344 {
1345         struct wireless_dev *wdev = dev->ieee80211_ptr;
1346         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1347         struct cfg80211_event *ev;
1348         unsigned long flags;
1349
1350         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1351         if (!ev)
1352                 return;
1353
1354         ev->type = EVENT_DISCONNECTED;
1355         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1356         ev->dc.ie_len = ie_len;
1357         memcpy((void *)ev->dc.ie, ie, ie_len);
1358         ev->dc.reason = reason;
1359         ev->dc.locally_generated = locally_generated;
1360
1361         spin_lock_irqsave(&wdev->event_lock, flags);
1362         list_add_tail(&ev->list, &wdev->event_list);
1363         spin_unlock_irqrestore(&wdev->event_lock, flags);
1364         queue_work(cfg80211_wq, &rdev->event_work);
1365 }
1366 EXPORT_SYMBOL(cfg80211_disconnected);
1367
1368 /*
1369  * API calls for nl80211/wext compatibility code
1370  */
1371 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1372                      struct net_device *dev,
1373                      struct cfg80211_connect_params *connect,
1374                      struct cfg80211_cached_keys *connkeys,
1375                      const u8 *prev_bssid)
1376 {
1377         struct wireless_dev *wdev = dev->ieee80211_ptr;
1378         int err;
1379
1380         ASSERT_WDEV_LOCK(wdev);
1381
1382         /*
1383          * If we have an ssid_len, we're trying to connect or are
1384          * already connected, so reject a new SSID unless it's the
1385          * same (which is the case for re-association.)
1386          */
1387         if (wdev->u.client.ssid_len &&
1388             (wdev->u.client.ssid_len != connect->ssid_len ||
1389              memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1390                 return -EALREADY;
1391
1392         /*
1393          * If connected, reject (re-)association unless prev_bssid
1394          * matches the current BSSID.
1395          */
1396         if (wdev->connected) {
1397                 if (!prev_bssid)
1398                         return -EALREADY;
1399                 if (!ether_addr_equal(prev_bssid,
1400                                       wdev->u.client.connected_addr))
1401                         return -ENOTCONN;
1402         }
1403
1404         /*
1405          * Reject if we're in the process of connecting with WEP,
1406          * this case isn't very interesting and trying to handle
1407          * it would make the code much more complex.
1408          */
1409         if (wdev->connect_keys)
1410                 return -EINPROGRESS;
1411
1412         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1413                                   rdev->wiphy.ht_capa_mod_mask);
1414         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1415                                    rdev->wiphy.vht_capa_mod_mask);
1416
1417         if (connkeys && connkeys->def >= 0) {
1418                 int idx;
1419                 u32 cipher;
1420
1421                 idx = connkeys->def;
1422                 cipher = connkeys->params[idx].cipher;
1423                 /* If given a WEP key we may need it for shared key auth */
1424                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1425                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1426                         connect->key_idx = idx;
1427                         connect->key = connkeys->params[idx].key;
1428                         connect->key_len = connkeys->params[idx].key_len;
1429
1430                         /*
1431                          * If ciphers are not set (e.g. when going through
1432                          * iwconfig), we have to set them appropriately here.
1433                          */
1434                         if (connect->crypto.cipher_group == 0)
1435                                 connect->crypto.cipher_group = cipher;
1436
1437                         if (connect->crypto.n_ciphers_pairwise == 0) {
1438                                 connect->crypto.n_ciphers_pairwise = 1;
1439                                 connect->crypto.ciphers_pairwise[0] = cipher;
1440                         }
1441                 }
1442
1443                 connect->crypto.wep_keys = connkeys->params;
1444                 connect->crypto.wep_tx_key = connkeys->def;
1445         } else {
1446                 if (WARN_ON(connkeys))
1447                         return -EINVAL;
1448         }
1449
1450         wdev->connect_keys = connkeys;
1451         memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1452         wdev->u.client.ssid_len = connect->ssid_len;
1453
1454         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1455                                               IEEE80211_BSS_TYPE_ESS;
1456
1457         if (!rdev->ops->connect)
1458                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1459         else
1460                 err = rdev_connect(rdev, dev, connect);
1461
1462         if (err) {
1463                 wdev->connect_keys = NULL;
1464                 /*
1465                  * This could be reassoc getting refused, don't clear
1466                  * ssid_len in that case.
1467                  */
1468                 if (!wdev->connected)
1469                         wdev->u.client.ssid_len = 0;
1470                 return err;
1471         }
1472
1473         return 0;
1474 }
1475
1476 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1477                         struct net_device *dev, u16 reason, bool wextev)
1478 {
1479         struct wireless_dev *wdev = dev->ieee80211_ptr;
1480         int err = 0;
1481
1482         ASSERT_WDEV_LOCK(wdev);
1483
1484         kfree_sensitive(wdev->connect_keys);
1485         wdev->connect_keys = NULL;
1486
1487         wdev->conn_owner_nlportid = 0;
1488
1489         if (wdev->conn)
1490                 err = cfg80211_sme_disconnect(wdev, reason);
1491         else if (!rdev->ops->disconnect)
1492                 cfg80211_mlme_down(rdev, dev);
1493         else if (wdev->u.client.ssid_len)
1494                 err = rdev_disconnect(rdev, dev, reason);
1495
1496         /*
1497          * Clear ssid_len unless we actually were fully connected,
1498          * in which case cfg80211_disconnected() will take care of
1499          * this later.
1500          */
1501         if (!wdev->connected)
1502                 wdev->u.client.ssid_len = 0;
1503
1504         return err;
1505 }
1506
1507 /*
1508  * Used to clean up after the connection / connection attempt owner socket
1509  * disconnects
1510  */
1511 void cfg80211_autodisconnect_wk(struct work_struct *work)
1512 {
1513         struct wireless_dev *wdev =
1514                 container_of(work, struct wireless_dev, disconnect_wk);
1515         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1516
1517         wdev_lock(wdev);
1518
1519         if (wdev->conn_owner_nlportid) {
1520                 switch (wdev->iftype) {
1521                 case NL80211_IFTYPE_ADHOC:
1522                         __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1523                         break;
1524                 case NL80211_IFTYPE_AP:
1525                 case NL80211_IFTYPE_P2P_GO:
1526                         __cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1527                         break;
1528                 case NL80211_IFTYPE_MESH_POINT:
1529                         __cfg80211_leave_mesh(rdev, wdev->netdev);
1530                         break;
1531                 case NL80211_IFTYPE_STATION:
1532                 case NL80211_IFTYPE_P2P_CLIENT:
1533                         /*
1534                          * Use disconnect_bssid if still connecting and
1535                          * ops->disconnect not implemented.  Otherwise we can
1536                          * use cfg80211_disconnect.
1537                          */
1538                         if (rdev->ops->disconnect || wdev->connected)
1539                                 cfg80211_disconnect(rdev, wdev->netdev,
1540                                                     WLAN_REASON_DEAUTH_LEAVING,
1541                                                     true);
1542                         else
1543                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1544                                                      wdev->disconnect_bssid,
1545                                                      NULL, 0,
1546                                                      WLAN_REASON_DEAUTH_LEAVING,
1547                                                      false);
1548                         break;
1549                 default:
1550                         break;
1551                 }
1552         }
1553
1554         wdev_unlock(wdev);
1555 }