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   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 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_RTNL();
  71         ASSERT_WDEV_LOCK(wdev);
  72
  73         if (rdev->scan_req || rdev->scan_msg)
  74                 return -EBUSY;
  75
  76         if (wdev->conn->params.channel)
  77                 n_channels = 1;
  78         else
  79                 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
  80
  81         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  82                           sizeof(request->channels[0]) * n_channels,
  83                           GFP_KERNEL);
  84         if (!request)
  85                 return -ENOMEM;
  86
  87         if (wdev->conn->params.channel) {
  88                 enum nl80211_band band = wdev->conn->params.channel->band;
  89                 struct ieee80211_supported_band *sband =
  90                         wdev->wiphy->bands[band];
  91
  92                 if (!sband) {
  93                         kfree(request);
  94                         return -EINVAL;
  95                 }
  96                 request->channels[0] = wdev->conn->params.channel;
  97                 request->rates[band] = (1 << sband->n_bitrates) - 1;
  98         } else {
  99                 int i = 0, j;
 100                 enum nl80211_band band;
 101                 struct ieee80211_supported_band *bands;
 102                 struct ieee80211_channel *channel;
 103
 104                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
 105                         bands = wdev->wiphy->bands[band];
 106                         if (!bands)
 107                                 continue;
 108                         for (j = 0; j < bands->n_channels; j++) {
 109                                 channel = &bands->channels[j];
 110                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 111                                         continue;
 112                                 request->channels[i++] = channel;
 113                         }
 114                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 115                 }
 116                 n_channels = i;
 117         }
 118         request->n_channels = n_channels;
 119         request->ssids = (void *)&request->channels[n_channels];
 120         request->n_ssids = 1;
 121
 122         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 123                 wdev->conn->params.ssid_len);
 124         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 125
 126         eth_broadcast_addr(request->bssid);
 127
 128         request->wdev = wdev;
 129         request->wiphy = &rdev->wiphy;
 130         request->scan_start = jiffies;
 131
 132         rdev->scan_req = request;
 133
 134         err = rdev_scan(rdev, request);
 135         if (!err) {
 136                 wdev->conn->state = CFG80211_CONN_SCANNING;
 137                 nl80211_send_scan_start(rdev, wdev);
 138                 dev_hold(wdev->netdev);
 139         } else {
 140                 rdev->scan_req = NULL;
 141                 kfree(request);
 142         }
 143         return err;
 144 }
 145
 146 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 147                                  enum nl80211_timeout_reason *treason)
 148 {
 149         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 150         struct cfg80211_connect_params *params;
 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                 return cfg80211_mlme_auth(rdev, wdev->netdev,
 172                                           params->channel, params->auth_type,
 173                                           params->bssid,
 174                                           params->ssid, params->ssid_len,
 175                                           NULL, 0,
 176                                           params->key, params->key_len,
 177                                           params->key_idx, NULL, 0);
 178         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 179                 *treason = NL80211_TIMEOUT_AUTH;
 180                 return -ENOTCONN;
 181         case CFG80211_CONN_ASSOCIATE_NEXT:
 182                 if (WARN_ON(!rdev->ops->assoc))
 183                         return -EOPNOTSUPP;
 184                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 185                 if (wdev->conn->prev_bssid_valid)
 186                         req.prev_bssid = wdev->conn->prev_bssid;
 187                 req.ie = params->ie;
 188                 req.ie_len = params->ie_len;
 189                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 190                 req.crypto = params->crypto;
 191                 req.flags = params->flags;
 192                 req.ht_capa = params->ht_capa;
 193                 req.ht_capa_mask = params->ht_capa_mask;
 194                 req.vht_capa = params->vht_capa;
 195                 req.vht_capa_mask = params->vht_capa_mask;
 196
 197                 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,
 198                                           params->bssid, params->ssid,
 199                                           params->ssid_len, &req);
 200                 if (err)
 201                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 202                                              NULL, 0,
 203                                              WLAN_REASON_DEAUTH_LEAVING,
 204                                              false);
 205                 return err;
 206         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 207                 *treason = NL80211_TIMEOUT_ASSOC;
 208                 /* fall through */
 209         case CFG80211_CONN_ASSOC_FAILED:
 210                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 211                                      NULL, 0,
 212                                      WLAN_REASON_DEAUTH_LEAVING, false);
 213                 return -ENOTCONN;
 214         case CFG80211_CONN_DEAUTH:
 215                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 216                                      NULL, 0,
 217                                      WLAN_REASON_DEAUTH_LEAVING, false);
 218                 /* fall through */
 219         case CFG80211_CONN_ABANDON:
 220                 /* free directly, disconnected event already sent */
 221                 cfg80211_sme_free(wdev);
 222                 return 0;
 223         default:
 224                 return 0;
 225         }
 226 }
 227
 228 void cfg80211_conn_work(struct work_struct *work)
 229 {
 230         struct cfg80211_registered_device *rdev =
 231                 container_of(work, struct cfg80211_registered_device, conn_work);
 232         struct wireless_dev *wdev;
 233         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 234         enum nl80211_timeout_reason treason;
 235
 236         rtnl_lock();
 237
 238         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 239                 if (!wdev->netdev)
 240                         continue;
 241
 242                 wdev_lock(wdev);
 243                 if (!netif_running(wdev->netdev)) {
 244                         wdev_unlock(wdev);
 245                         continue;
 246                 }
 247                 if (!wdev->conn ||
 248                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
 249                         wdev_unlock(wdev);
 250                         continue;
 251                 }
 252                 if (wdev->conn->params.bssid) {
 253                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 254                         bssid = bssid_buf;
 255                 }
 256                 treason = NL80211_TIMEOUT_UNSPECIFIED;
 257                 if (cfg80211_conn_do_work(wdev, &treason)) {
 258                         struct cfg80211_connect_resp_params cr;
 259
 260                         memset(&cr, 0, sizeof(cr));
 261                         cr.status = -1;
 262                         cr.bssid = bssid;
 263                         cr.timeout_reason = treason;
 264                         __cfg80211_connect_result(wdev->netdev, &cr, false);
 265                 }
 266                 wdev_unlock(wdev);
 267         }
 268
 269         rtnl_unlock();
 270 }
 271
 272 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
 273                                     struct cfg80211_bss *bss)
 274 {
 275         memcpy(conn->bssid, bss->bssid, ETH_ALEN);
 276         conn->params.bssid = conn->bssid;
 277         conn->params.channel = bss->channel;
 278         conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 279 }
 280
 281 /* Returned bss is reference counted and must be cleaned up appropriately. */
 282 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 283 {
 284         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 285         struct cfg80211_bss *bss;
 286
 287         ASSERT_WDEV_LOCK(wdev);
 288
 289         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 290                                wdev->conn->params.bssid,
 291                                wdev->conn->params.ssid,
 292                                wdev->conn->params.ssid_len,
 293                                wdev->conn_bss_type,
 294                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 295         if (!bss)
 296                 return NULL;
 297
 298         cfg80211_step_auth_next(wdev->conn, bss);
 299         schedule_work(&rdev->conn_work);
 300
 301         return bss;
 302 }
 303
 304 static void __cfg80211_sme_scan_done(struct net_device *dev)
 305 {
 306         struct wireless_dev *wdev = dev->ieee80211_ptr;
 307         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 308         struct cfg80211_bss *bss;
 309
 310         ASSERT_WDEV_LOCK(wdev);
 311
 312         if (!wdev->conn)
 313                 return;
 314
 315         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 316             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 317                 return;
 318
 319         bss = cfg80211_get_conn_bss(wdev);
 320         if (bss)
 321                 cfg80211_put_bss(&rdev->wiphy, bss);
 322         else
 323                 schedule_work(&rdev->conn_work);
 324 }
 325
 326 void cfg80211_sme_scan_done(struct net_device *dev)
 327 {
 328         struct wireless_dev *wdev = dev->ieee80211_ptr;
 329
 330         wdev_lock(wdev);
 331         __cfg80211_sme_scan_done(dev);
 332         wdev_unlock(wdev);
 333 }
 334
 335 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 336 {
 337         struct wiphy *wiphy = wdev->wiphy;
 338         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 339         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 340         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 341
 342         ASSERT_WDEV_LOCK(wdev);
 343
 344         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 345                 return;
 346
 347         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 348             wdev->conn->auto_auth &&
 349             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 350                 /* select automatically between only open, shared, leap */
 351                 switch (wdev->conn->params.auth_type) {
 352                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 353                         if (wdev->connect_keys)
 354                                 wdev->conn->params.auth_type =
 355                                         NL80211_AUTHTYPE_SHARED_KEY;
 356                         else
 357                                 wdev->conn->params.auth_type =
 358                                         NL80211_AUTHTYPE_NETWORK_EAP;
 359                         break;
 360                 case NL80211_AUTHTYPE_SHARED_KEY:
 361                         wdev->conn->params.auth_type =
 362                                 NL80211_AUTHTYPE_NETWORK_EAP;
 363                         break;
 364                 default:
 365                         /* huh? */
 366                         wdev->conn->params.auth_type =
 367                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 368                         break;
 369                 }
 370                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 371                 schedule_work(&rdev->conn_work);
 372         } else if (status_code != WLAN_STATUS_SUCCESS) {
 373                 struct cfg80211_connect_resp_params cr;
 374
 375                 memset(&cr, 0, sizeof(cr));
 376                 cr.status = status_code;
 377                 cr.bssid = mgmt->bssid;
 378                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 379                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 380         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 381                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 382                 schedule_work(&rdev->conn_work);
 383         }
 384 }
 385
 386 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 387 {
 388         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 389
 390         if (!wdev->conn)
 391                 return false;
 392
 393         if (status == WLAN_STATUS_SUCCESS) {
 394                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 395                 return false;
 396         }
 397
 398         if (wdev->conn->prev_bssid_valid) {
 399                 /*
 400                  * Some stupid APs don't accept reassoc, so we
 401                  * need to fall back to trying regular assoc;
 402                  * return true so no event is sent to userspace.
 403                  */
 404                 wdev->conn->prev_bssid_valid = false;
 405                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 406                 schedule_work(&rdev->conn_work);
 407                 return true;
 408         }
 409
 410         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 411         schedule_work(&rdev->conn_work);
 412         return false;
 413 }
 414
 415 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 416 {
 417         cfg80211_sme_free(wdev);
 418 }
 419
 420 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 421 {
 422         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 423
 424         if (!wdev->conn)
 425                 return;
 426
 427         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 428         schedule_work(&rdev->conn_work);
 429 }
 430
 431 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 432 {
 433         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 434
 435         if (!wdev->conn)
 436                 return;
 437
 438         wdev->conn->state = CFG80211_CONN_DEAUTH;
 439         schedule_work(&rdev->conn_work);
 440 }
 441
 442 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 443 {
 444         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 445
 446         if (!wdev->conn)
 447                 return;
 448
 449         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 450         schedule_work(&rdev->conn_work);
 451 }
 452
 453 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 454 {
 455         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 456
 457         if (!wdev->conn)
 458                 return;
 459
 460         wdev->conn->state = CFG80211_CONN_ABANDON;
 461         schedule_work(&rdev->conn_work);
 462 }
 463
 464 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 465                                      const u8 *ies, size_t ies_len,
 466                                      const u8 **out_ies, size_t *out_ies_len)
 467 {
 468         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 469         u8 *buf;
 470         size_t offs;
 471
 472         if (!rdev->wiphy.extended_capabilities_len ||
 473             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 474                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 475                 if (!*out_ies)
 476                         return -ENOMEM;
 477                 *out_ies_len = ies_len;
 478                 return 0;
 479         }
 480
 481         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 482                       GFP_KERNEL);
 483         if (!buf)
 484                 return -ENOMEM;
 485
 486         if (ies_len) {
 487                 static const u8 before_extcapa[] = {
 488                         /* not listing IEs expected to be created by driver */
 489                         WLAN_EID_RSN,
 490                         WLAN_EID_QOS_CAPA,
 491                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 492                         WLAN_EID_MOBILITY_DOMAIN,
 493                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 494                         WLAN_EID_BSS_COEX_2040,
 495                 };
 496
 497                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 498                                           ARRAY_SIZE(before_extcapa), 0);
 499                 memcpy(buf, ies, offs);
 500                 /* leave a whole for extended capabilities IE */
 501                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 502                        ies + offs, ies_len - offs);
 503         } else {
 504                 offs = 0;
 505         }
 506
 507         /* place extended capabilities IE (with only driver capabilities) */
 508         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 509         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 510         memcpy(buf + offs + 2,
 511                rdev->wiphy.extended_capabilities,
 512                rdev->wiphy.extended_capabilities_len);
 513
 514         *out_ies = buf;
 515         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 516
 517         return 0;
 518 }
 519
 520 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 521                                 struct cfg80211_connect_params *connect,
 522                                 const u8 *prev_bssid)
 523 {
 524         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 525         struct cfg80211_bss *bss;
 526         int err;
 527
 528         if (!rdev->ops->auth || !rdev->ops->assoc)
 529                 return -EOPNOTSUPP;
 530
 531         if (wdev->current_bss) {
 532                 cfg80211_unhold_bss(wdev->current_bss);
 533                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 534                 wdev->current_bss = NULL;
 535
 536                 cfg80211_sme_free(wdev);
 537         }
 538
 539         if (wdev->conn)
 540                 return -EINPROGRESS;
 541
 542         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 543         if (!wdev->conn)
 544                 return -ENOMEM;
 545
 546         /*
 547          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 548          */
 549         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 550         if (connect->bssid) {
 551                 wdev->conn->params.bssid = wdev->conn->bssid;
 552                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 553         }
 554
 555         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 556                                       &wdev->conn->ie,
 557                                       &wdev->conn->params.ie_len)) {
 558                 kfree(wdev->conn);
 559                 wdev->conn = NULL;
 560                 return -ENOMEM;
 561         }
 562         wdev->conn->params.ie = wdev->conn->ie;
 563
 564         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 565                 wdev->conn->auto_auth = true;
 566                 /* start with open system ... should mostly work */
 567                 wdev->conn->params.auth_type =
 568                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 569         } else {
 570                 wdev->conn->auto_auth = false;
 571         }
 572
 573         wdev->conn->params.ssid = wdev->ssid;
 574         wdev->conn->params.ssid_len = wdev->ssid_len;
 575
 576         /* see if we have the bss already */
 577         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 578                                wdev->conn->params.bssid,
 579                                wdev->conn->params.ssid,
 580                                wdev->conn->params.ssid_len,
 581                                wdev->conn_bss_type,
 582                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 583
 584         if (prev_bssid) {
 585                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 586                 wdev->conn->prev_bssid_valid = true;
 587         }
 588
 589         /* we're good if we have a matching bss struct */
 590         if (bss) {
 591                 enum nl80211_timeout_reason treason;
 592
 593                 cfg80211_step_auth_next(wdev->conn, bss);
 594                 err = cfg80211_conn_do_work(wdev, &treason);
 595                 cfg80211_put_bss(wdev->wiphy, bss);
 596         } else {
 597                 /* otherwise we'll need to scan for the AP first */
 598                 err = cfg80211_conn_scan(wdev);
 599
 600                 /*
 601                  * If we can't scan right now, then we need to scan again
 602                  * after the current scan finished, since the parameters
 603                  * changed (unless we find a good AP anyway).
 604                  */
 605                 if (err == -EBUSY) {
 606                         err = 0;
 607                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 608                 }
 609         }
 610
 611         if (err)
 612                 cfg80211_sme_free(wdev);
 613
 614         return err;
 615 }
 616
 617 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 618 {
 619         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 620         int err;
 621
 622         if (!wdev->conn)
 623                 return 0;
 624
 625         if (!rdev->ops->deauth)
 626                 return -EOPNOTSUPP;
 627
 628         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 629             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 630                 err = 0;
 631                 goto out;
 632         }
 633
 634         /* wdev->conn->params.bssid must be set if > SCANNING */
 635         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 636                                    wdev->conn->params.bssid,
 637                                    NULL, 0, reason, false);
 638  out:
 639         cfg80211_sme_free(wdev);
 640         return err;
 641 }
 642
 643 /*
 644  * code shared for in-device and software SME
 645  */
 646
 647 static bool cfg80211_is_all_idle(void)
 648 {
 649         struct cfg80211_registered_device *rdev;
 650         struct wireless_dev *wdev;
 651         bool is_all_idle = true;
 652
 653         /*
 654          * All devices must be idle as otherwise if you are actively
 655          * scanning some new beacon hints could be learned and would
 656          * count as new regulatory hints.
 657          * Also if there is any other active beaconing interface we
 658          * need not issue a disconnect hint and reset any info such
 659          * as chan dfs state, etc.
 660          */
 661         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 662                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 663                         wdev_lock(wdev);
 664                         if (wdev->conn || wdev->current_bss ||
 665                             cfg80211_beaconing_iface_active(wdev))
 666                                 is_all_idle = false;
 667                         wdev_unlock(wdev);
 668                 }
 669         }
 670
 671         return is_all_idle;
 672 }
 673
 674 static void disconnect_work(struct work_struct *work)
 675 {
 676         rtnl_lock();
 677         if (cfg80211_is_all_idle())
 678                 regulatory_hint_disconnect();
 679         rtnl_unlock();
 680 }
 681
 682 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 683
 684
 685 /*
 686  * API calls for drivers implementing connect/disconnect and
 687  * SME event handling
 688  */
 689
 690 /* This method must consume bss one way or another */
 691 void __cfg80211_connect_result(struct net_device *dev,
 692                                struct cfg80211_connect_resp_params *cr,
 693                                bool wextev)
 694 {
 695         struct wireless_dev *wdev = dev->ieee80211_ptr;
 696         const u8 *country_ie;
 697 #ifdef CONFIG_CFG80211_WEXT
 698         union iwreq_data wrqu;
 699 #endif
 700
 701         ASSERT_WDEV_LOCK(wdev);
 702
 703         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 704                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
 705                 cfg80211_put_bss(wdev->wiphy, cr->bss);
 706                 return;
 707         }
 708
 709         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 710                                     GFP_KERNEL);
 711
 712 #ifdef CONFIG_CFG80211_WEXT
 713         if (wextev) {
 714                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 715                         memset(&wrqu, 0, sizeof(wrqu));
 716                         wrqu.data.length = cr->req_ie_len;
 717                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 718                                             cr->req_ie);
 719                 }
 720
 721                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 722                         memset(&wrqu, 0, sizeof(wrqu));
 723                         wrqu.data.length = cr->resp_ie_len;
 724                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 725                                             cr->resp_ie);
 726                 }
 727
 728                 memset(&wrqu, 0, sizeof(wrqu));
 729                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 730                 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
 731                         memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
 732                         memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
 733                         wdev->wext.prev_bssid_valid = true;
 734                 }
 735                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 736         }
 737 #endif
 738
 739         if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
 740                 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
 741                 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
 742                                            wdev->ssid, wdev->ssid_len,
 743                                            wdev->conn_bss_type,
 744                                            IEEE80211_PRIVACY_ANY);
 745                 if (cr->bss)
 746                         cfg80211_hold_bss(bss_from_pub(cr->bss));
 747         }
 748
 749         if (wdev->current_bss) {
 750                 cfg80211_unhold_bss(wdev->current_bss);
 751                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 752                 wdev->current_bss = NULL;
 753         }
 754
 755         if (cr->status != WLAN_STATUS_SUCCESS) {
 756                 kzfree(wdev->connect_keys);
 757                 wdev->connect_keys = NULL;
 758                 wdev->ssid_len = 0;
 759                 wdev->conn_owner_nlportid = 0;
 760                 if (cr->bss) {
 761                         cfg80211_unhold_bss(bss_from_pub(cr->bss));
 762                         cfg80211_put_bss(wdev->wiphy, cr->bss);
 763                 }
 764                 cfg80211_sme_free(wdev);
 765                 return;
 766         }
 767
 768         if (WARN_ON(!cr->bss))
 769                 return;
 770
 771         wdev->current_bss = bss_from_pub(cr->bss);
 772
 773         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 774                 cfg80211_upload_connect_keys(wdev);
 775
 776         rcu_read_lock();
 777         country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
 778         if (!country_ie) {
 779                 rcu_read_unlock();
 780                 return;
 781         }
 782
 783         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
 784         rcu_read_unlock();
 785
 786         if (!country_ie)
 787                 return;
 788
 789         /*
 790          * ieee80211_bss_get_ie() ensures we can access:
 791          * - country_ie + 2, the start of the country ie data, and
 792          * - and country_ie[1] which is the IE length
 793          */
 794         regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
 795                                    country_ie + 2, country_ie[1]);
 796         kfree(country_ie);
 797 }
 798
 799 /* Consumes bss object one way or another */
 800 void cfg80211_connect_done(struct net_device *dev,
 801                            struct cfg80211_connect_resp_params *params,
 802                            gfp_t gfp)
 803 {
 804         struct wireless_dev *wdev = dev->ieee80211_ptr;
 805         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 806         struct cfg80211_event *ev;
 807         unsigned long flags;
 808         u8 *next;
 809
 810         if (params->bss) {
 811                 /* Make sure the bss entry provided by the driver is valid. */
 812                 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
 813
 814                 if (WARN_ON(list_empty(&ibss->list))) {
 815                         cfg80211_put_bss(wdev->wiphy, params->bss);
 816                         return;
 817                 }
 818         }
 819
 820         ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
 821                      params->req_ie_len + params->resp_ie_len +
 822                      params->fils_kek_len + params->pmk_len +
 823                      (params->pmkid ? WLAN_PMKID_LEN : 0), gfp);
 824         if (!ev) {
 825                 cfg80211_put_bss(wdev->wiphy, params->bss);
 826                 return;
 827         }
 828
 829         ev->type = EVENT_CONNECT_RESULT;
 830         next = ((u8 *)ev) + sizeof(*ev);
 831         if (params->bssid) {
 832                 ev->cr.bssid = next;
 833                 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
 834                 next += ETH_ALEN;
 835         }
 836         if (params->req_ie_len) {
 837                 ev->cr.req_ie = next;
 838                 ev->cr.req_ie_len = params->req_ie_len;
 839                 memcpy((void *)ev->cr.req_ie, params->req_ie,
 840                        params->req_ie_len);
 841                 next += params->req_ie_len;
 842         }
 843         if (params->resp_ie_len) {
 844                 ev->cr.resp_ie = next;
 845                 ev->cr.resp_ie_len = params->resp_ie_len;
 846                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
 847                        params->resp_ie_len);
 848                 next += params->resp_ie_len;
 849         }
 850         if (params->fils_kek_len) {
 851                 ev->cr.fils_kek = next;
 852                 ev->cr.fils_kek_len = params->fils_kek_len;
 853                 memcpy((void *)ev->cr.fils_kek, params->fils_kek,
 854                        params->fils_kek_len);
 855                 next += params->fils_kek_len;
 856         }
 857         if (params->pmk_len) {
 858                 ev->cr.pmk = next;
 859                 ev->cr.pmk_len = params->pmk_len;
 860                 memcpy((void *)ev->cr.pmk, params->pmk, params->pmk_len);
 861                 next += params->pmk_len;
 862         }
 863         if (params->pmkid) {
 864                 ev->cr.pmkid = next;
 865                 memcpy((void *)ev->cr.pmkid, params->pmkid, WLAN_PMKID_LEN);
 866                 next += WLAN_PMKID_LEN;
 867         }
 868         ev->cr.update_erp_next_seq_num = params->update_erp_next_seq_num;
 869         if (params->update_erp_next_seq_num)
 870                 ev->cr.fils_erp_next_seq_num = params->fils_erp_next_seq_num;
 871         if (params->bss)
 872                 cfg80211_hold_bss(bss_from_pub(params->bss));
 873         ev->cr.bss = params->bss;
 874         ev->cr.status = params->status;
 875         ev->cr.timeout_reason = params->timeout_reason;
 876
 877         spin_lock_irqsave(&wdev->event_lock, flags);
 878         list_add_tail(&ev->list, &wdev->event_list);
 879         spin_unlock_irqrestore(&wdev->event_lock, flags);
 880         queue_work(cfg80211_wq, &rdev->event_work);
 881 }
 882 EXPORT_SYMBOL(cfg80211_connect_done);
 883
 884 /* Consumes bss object one way or another */
 885 void __cfg80211_roamed(struct wireless_dev *wdev,
 886                        struct cfg80211_roam_info *info)
 887 {
 888 #ifdef CONFIG_CFG80211_WEXT
 889         union iwreq_data wrqu;
 890 #endif
 891         ASSERT_WDEV_LOCK(wdev);
 892
 893         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 894                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 895                 goto out;
 896
 897         if (WARN_ON(!wdev->current_bss))
 898                 goto out;
 899
 900         cfg80211_unhold_bss(wdev->current_bss);
 901         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 902         wdev->current_bss = NULL;
 903
 904         if (WARN_ON(!info->bss))
 905                 return;
 906
 907         cfg80211_hold_bss(bss_from_pub(info->bss));
 908         wdev->current_bss = bss_from_pub(info->bss);
 909
 910         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
 911                             wdev->netdev, info, GFP_KERNEL);
 912
 913 #ifdef CONFIG_CFG80211_WEXT
 914         if (info->req_ie) {
 915                 memset(&wrqu, 0, sizeof(wrqu));
 916                 wrqu.data.length = info->req_ie_len;
 917                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 918                                     &wrqu, info->req_ie);
 919         }
 920
 921         if (info->resp_ie) {
 922                 memset(&wrqu, 0, sizeof(wrqu));
 923                 wrqu.data.length = info->resp_ie_len;
 924                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 925                                     &wrqu, info->resp_ie);
 926         }
 927
 928         memset(&wrqu, 0, sizeof(wrqu));
 929         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 930         memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
 931         memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
 932         wdev->wext.prev_bssid_valid = true;
 933         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 934 #endif
 935
 936         return;
 937 out:
 938         cfg80211_put_bss(wdev->wiphy, info->bss);
 939 }
 940
 941 /* Consumes info->bss object one way or another */
 942 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
 943                      gfp_t gfp)
 944 {
 945         struct wireless_dev *wdev = dev->ieee80211_ptr;
 946         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 947         struct cfg80211_event *ev;
 948         unsigned long flags;
 949
 950         if (!info->bss) {
 951                 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
 952                                              info->bssid, wdev->ssid,
 953                                              wdev->ssid_len,
 954                                              wdev->conn_bss_type,
 955                                              IEEE80211_PRIVACY_ANY);
 956         }
 957
 958         if (WARN_ON(!info->bss))
 959                 return;
 960
 961         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len, gfp);
 962         if (!ev) {
 963                 cfg80211_put_bss(wdev->wiphy, info->bss);
 964                 return;
 965         }
 966
 967         ev->type = EVENT_ROAMED;
 968         ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev);
 969         ev->rm.req_ie_len = info->req_ie_len;
 970         memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
 971         ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + info->req_ie_len;
 972         ev->rm.resp_ie_len = info->resp_ie_len;
 973         memcpy((void *)ev->rm.resp_ie, info->resp_ie, info->resp_ie_len);
 974         ev->rm.bss = info->bss;
 975         ev->rm.authorized = info->authorized;
 976
 977         spin_lock_irqsave(&wdev->event_lock, flags);
 978         list_add_tail(&ev->list, &wdev->event_list);
 979         spin_unlock_irqrestore(&wdev->event_lock, flags);
 980         queue_work(cfg80211_wq, &rdev->event_work);
 981 }
 982 EXPORT_SYMBOL(cfg80211_roamed);
 983
 984 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 985                              size_t ie_len, u16 reason, bool from_ap)
 986 {
 987         struct wireless_dev *wdev = dev->ieee80211_ptr;
 988         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 989         int i;
 990 #ifdef CONFIG_CFG80211_WEXT
 991         union iwreq_data wrqu;
 992 #endif
 993
 994         ASSERT_WDEV_LOCK(wdev);
 995
 996         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 997                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 998                 return;
 999
1000         if (wdev->current_bss) {
1001                 cfg80211_unhold_bss(wdev->current_bss);
1002                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1003         }
1004
1005         wdev->current_bss = NULL;
1006         wdev->ssid_len = 0;
1007         wdev->conn_owner_nlportid = 0;
1008         kzfree(wdev->connect_keys);
1009         wdev->connect_keys = NULL;
1010
1011         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1012
1013         /* stop critical protocol if supported */
1014         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1015                 rdev->crit_proto_nlportid = 0;
1016                 rdev_crit_proto_stop(rdev, wdev);
1017         }
1018
1019         /*
1020          * Delete all the keys ... pairwise keys can't really
1021          * exist any more anyway, but default keys might.
1022          */
1023         if (rdev->ops->del_key)
1024                 for (i = 0; i < 6; i++)
1025                         rdev_del_key(rdev, dev, i, false, NULL);
1026
1027         rdev_set_qos_map(rdev, dev, NULL);
1028
1029 #ifdef CONFIG_CFG80211_WEXT
1030         memset(&wrqu, 0, sizeof(wrqu));
1031         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1032         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1033         wdev->wext.connect.ssid_len = 0;
1034 #endif
1035
1036         schedule_work(&cfg80211_disconnect_work);
1037 }
1038
1039 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1040                            const u8 *ie, size_t ie_len,
1041                            bool locally_generated, gfp_t gfp)
1042 {
1043         struct wireless_dev *wdev = dev->ieee80211_ptr;
1044         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1045         struct cfg80211_event *ev;
1046         unsigned long flags;
1047
1048         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1049         if (!ev)
1050                 return;
1051
1052         ev->type = EVENT_DISCONNECTED;
1053         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1054         ev->dc.ie_len = ie_len;
1055         memcpy((void *)ev->dc.ie, ie, ie_len);
1056         ev->dc.reason = reason;
1057         ev->dc.locally_generated = locally_generated;
1058
1059         spin_lock_irqsave(&wdev->event_lock, flags);
1060         list_add_tail(&ev->list, &wdev->event_list);
1061         spin_unlock_irqrestore(&wdev->event_lock, flags);
1062         queue_work(cfg80211_wq, &rdev->event_work);
1063 }
1064 EXPORT_SYMBOL(cfg80211_disconnected);
1065
1066 /*
1067  * API calls for nl80211/wext compatibility code
1068  */
1069 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1070                      struct net_device *dev,
1071                      struct cfg80211_connect_params *connect,
1072                      struct cfg80211_cached_keys *connkeys,
1073                      const u8 *prev_bssid)
1074 {
1075         struct wireless_dev *wdev = dev->ieee80211_ptr;
1076         int err;
1077
1078         ASSERT_WDEV_LOCK(wdev);
1079
1080         /*
1081          * If we have an ssid_len, we're trying to connect or are
1082          * already connected, so reject a new SSID unless it's the
1083          * same (which is the case for re-association.)
1084          */
1085         if (wdev->ssid_len &&
1086             (wdev->ssid_len != connect->ssid_len ||
1087              memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1088                 return -EALREADY;
1089
1090         /*
1091          * If connected, reject (re-)association unless prev_bssid
1092          * matches the current BSSID.
1093          */
1094         if (wdev->current_bss) {
1095                 if (!prev_bssid)
1096                         return -EALREADY;
1097                 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1098                         return -ENOTCONN;
1099         }
1100
1101         /*
1102          * Reject if we're in the process of connecting with WEP,
1103          * this case isn't very interesting and trying to handle
1104          * it would make the code much more complex.
1105          */
1106         if (wdev->connect_keys)
1107                 return -EINPROGRESS;
1108
1109         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1110                                   rdev->wiphy.ht_capa_mod_mask);
1111
1112         if (connkeys && connkeys->def >= 0) {
1113                 int idx;
1114                 u32 cipher;
1115
1116                 idx = connkeys->def;
1117                 cipher = connkeys->params[idx].cipher;
1118                 /* If given a WEP key we may need it for shared key auth */
1119                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1120                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1121                         connect->key_idx = idx;
1122                         connect->key = connkeys->params[idx].key;
1123                         connect->key_len = connkeys->params[idx].key_len;
1124
1125                         /*
1126                          * If ciphers are not set (e.g. when going through
1127                          * iwconfig), we have to set them appropriately here.
1128                          */
1129                         if (connect->crypto.cipher_group == 0)
1130                                 connect->crypto.cipher_group = cipher;
1131
1132                         if (connect->crypto.n_ciphers_pairwise == 0) {
1133                                 connect->crypto.n_ciphers_pairwise = 1;
1134                                 connect->crypto.ciphers_pairwise[0] = cipher;
1135                         }
1136                 }
1137
1138                 connect->crypto.wep_keys = connkeys->params;
1139                 connect->crypto.wep_tx_key = connkeys->def;
1140         } else {
1141                 if (WARN_ON(connkeys))
1142                         return -EINVAL;
1143
1144                 /* connect can point to wdev->wext.connect which
1145                  * can hold key data from a previous connection
1146                  */
1147                 connect->key = NULL;
1148                 connect->key_len = 0;
1149                 connect->key_idx = 0;
1150         }
1151
1152         wdev->connect_keys = connkeys;
1153         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1154         wdev->ssid_len = connect->ssid_len;
1155
1156         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1157                                               IEEE80211_BSS_TYPE_ESS;
1158
1159         if (!rdev->ops->connect)
1160                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1161         else
1162                 err = rdev_connect(rdev, dev, connect);
1163
1164         if (err) {
1165                 wdev->connect_keys = NULL;
1166                 /*
1167                  * This could be reassoc getting refused, don't clear
1168                  * ssid_len in that case.
1169                  */
1170                 if (!wdev->current_bss)
1171                         wdev->ssid_len = 0;
1172                 return err;
1173         }
1174
1175         return 0;
1176 }
1177
1178 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1179                         struct net_device *dev, u16 reason, bool wextev)
1180 {
1181         struct wireless_dev *wdev = dev->ieee80211_ptr;
1182         int err = 0;
1183
1184         ASSERT_WDEV_LOCK(wdev);
1185
1186         kzfree(wdev->connect_keys);
1187         wdev->connect_keys = NULL;
1188
1189         wdev->conn_owner_nlportid = 0;
1190
1191         if (wdev->conn)
1192                 err = cfg80211_sme_disconnect(wdev, reason);
1193         else if (!rdev->ops->disconnect)
1194                 cfg80211_mlme_down(rdev, dev);
1195         else if (wdev->ssid_len)
1196                 err = rdev_disconnect(rdev, dev, reason);
1197
1198         /*
1199          * Clear ssid_len unless we actually were fully connected,
1200          * in which case cfg80211_disconnected() will take care of
1201          * this later.
1202          */
1203         if (!wdev->current_bss)
1204                 wdev->ssid_len = 0;
1205
1206         return err;
1207 }
1208
1209 /*
1210  * Used to clean up after the connection / connection attempt owner socket
1211  * disconnects
1212  */
1213 void cfg80211_autodisconnect_wk(struct work_struct *work)
1214 {
1215         struct wireless_dev *wdev =
1216                 container_of(work, struct wireless_dev, disconnect_wk);
1217         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1218
1219         wdev_lock(wdev);
1220
1221         if (wdev->conn_owner_nlportid) {
1222                 /*
1223                  * Use disconnect_bssid if still connecting and ops->disconnect
1224                  * not implemented.  Otherwise we can use cfg80211_disconnect.
1225                  */
1226                 if (rdev->ops->disconnect || wdev->current_bss)
1227                         cfg80211_disconnect(rdev, wdev->netdev,
1228                                             WLAN_REASON_DEAUTH_LEAVING, true);
1229                 else
1230                         cfg80211_mlme_deauth(rdev, wdev->netdev,
1231                                              wdev->disconnect_bssid, NULL, 0,
1232                                              WLAN_REASON_DEAUTH_LEAVING, false);
1233         }
1234
1235         wdev_unlock(wdev);
1236 }