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 /* Returned bss is reference counted and must be cleaned up appropriately. */
 273 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 274 {
 275         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 276         struct cfg80211_bss *bss;
 277
 278         ASSERT_WDEV_LOCK(wdev);
 279
 280         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 281                                wdev->conn->params.bssid,
 282                                wdev->conn->params.ssid,
 283                                wdev->conn->params.ssid_len,
 284                                wdev->conn_bss_type,
 285                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 286         if (!bss)
 287                 return NULL;
 288
 289         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 290         wdev->conn->params.bssid = wdev->conn->bssid;
 291         wdev->conn->params.channel = bss->channel;
 292         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 293         schedule_work(&rdev->conn_work);
 294
 295         return bss;
 296 }
 297
 298 static void __cfg80211_sme_scan_done(struct net_device *dev)
 299 {
 300         struct wireless_dev *wdev = dev->ieee80211_ptr;
 301         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 302         struct cfg80211_bss *bss;
 303
 304         ASSERT_WDEV_LOCK(wdev);
 305
 306         if (!wdev->conn)
 307                 return;
 308
 309         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 310             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 311                 return;
 312
 313         bss = cfg80211_get_conn_bss(wdev);
 314         if (bss)
 315                 cfg80211_put_bss(&rdev->wiphy, bss);
 316         else
 317                 schedule_work(&rdev->conn_work);
 318 }
 319
 320 void cfg80211_sme_scan_done(struct net_device *dev)
 321 {
 322         struct wireless_dev *wdev = dev->ieee80211_ptr;
 323
 324         wdev_lock(wdev);
 325         __cfg80211_sme_scan_done(dev);
 326         wdev_unlock(wdev);
 327 }
 328
 329 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 330 {
 331         struct wiphy *wiphy = wdev->wiphy;
 332         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 333         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 334         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 335
 336         ASSERT_WDEV_LOCK(wdev);
 337
 338         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 339                 return;
 340
 341         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 342             wdev->conn->auto_auth &&
 343             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 344                 /* select automatically between only open, shared, leap */
 345                 switch (wdev->conn->params.auth_type) {
 346                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 347                         if (wdev->connect_keys)
 348                                 wdev->conn->params.auth_type =
 349                                         NL80211_AUTHTYPE_SHARED_KEY;
 350                         else
 351                                 wdev->conn->params.auth_type =
 352                                         NL80211_AUTHTYPE_NETWORK_EAP;
 353                         break;
 354                 case NL80211_AUTHTYPE_SHARED_KEY:
 355                         wdev->conn->params.auth_type =
 356                                 NL80211_AUTHTYPE_NETWORK_EAP;
 357                         break;
 358                 default:
 359                         /* huh? */
 360                         wdev->conn->params.auth_type =
 361                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 362                         break;
 363                 }
 364                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 365                 schedule_work(&rdev->conn_work);
 366         } else if (status_code != WLAN_STATUS_SUCCESS) {
 367                 struct cfg80211_connect_resp_params cr;
 368
 369                 memset(&cr, 0, sizeof(cr));
 370                 cr.status = status_code;
 371                 cr.bssid = mgmt->bssid;
 372                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 373                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 374         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 375                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 376                 schedule_work(&rdev->conn_work);
 377         }
 378 }
 379
 380 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 381 {
 382         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 383
 384         if (!wdev->conn)
 385                 return false;
 386
 387         if (status == WLAN_STATUS_SUCCESS) {
 388                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 389                 return false;
 390         }
 391
 392         if (wdev->conn->prev_bssid_valid) {
 393                 /*
 394                  * Some stupid APs don't accept reassoc, so we
 395                  * need to fall back to trying regular assoc;
 396                  * return true so no event is sent to userspace.
 397                  */
 398                 wdev->conn->prev_bssid_valid = false;
 399                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 400                 schedule_work(&rdev->conn_work);
 401                 return true;
 402         }
 403
 404         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 405         schedule_work(&rdev->conn_work);
 406         return false;
 407 }
 408
 409 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 410 {
 411         cfg80211_sme_free(wdev);
 412 }
 413
 414 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 415 {
 416         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 417
 418         if (!wdev->conn)
 419                 return;
 420
 421         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 422         schedule_work(&rdev->conn_work);
 423 }
 424
 425 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 426 {
 427         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 428
 429         if (!wdev->conn)
 430                 return;
 431
 432         wdev->conn->state = CFG80211_CONN_DEAUTH;
 433         schedule_work(&rdev->conn_work);
 434 }
 435
 436 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 437 {
 438         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 439
 440         if (!wdev->conn)
 441                 return;
 442
 443         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 444         schedule_work(&rdev->conn_work);
 445 }
 446
 447 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 448 {
 449         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 450
 451         if (!wdev->conn)
 452                 return;
 453
 454         wdev->conn->state = CFG80211_CONN_ABANDON;
 455         schedule_work(&rdev->conn_work);
 456 }
 457
 458 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 459                                      const u8 *ies, size_t ies_len,
 460                                      const u8 **out_ies, size_t *out_ies_len)
 461 {
 462         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 463         u8 *buf;
 464         size_t offs;
 465
 466         if (!rdev->wiphy.extended_capabilities_len ||
 467             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 468                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 469                 if (!*out_ies)
 470                         return -ENOMEM;
 471                 *out_ies_len = ies_len;
 472                 return 0;
 473         }
 474
 475         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 476                       GFP_KERNEL);
 477         if (!buf)
 478                 return -ENOMEM;
 479
 480         if (ies_len) {
 481                 static const u8 before_extcapa[] = {
 482                         /* not listing IEs expected to be created by driver */
 483                         WLAN_EID_RSN,
 484                         WLAN_EID_QOS_CAPA,
 485                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 486                         WLAN_EID_MOBILITY_DOMAIN,
 487                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 488                         WLAN_EID_BSS_COEX_2040,
 489                 };
 490
 491                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 492                                           ARRAY_SIZE(before_extcapa), 0);
 493                 memcpy(buf, ies, offs);
 494                 /* leave a whole for extended capabilities IE */
 495                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 496                        ies + offs, ies_len - offs);
 497         } else {
 498                 offs = 0;
 499         }
 500
 501         /* place extended capabilities IE (with only driver capabilities) */
 502         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 503         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 504         memcpy(buf + offs + 2,
 505                rdev->wiphy.extended_capabilities,
 506                rdev->wiphy.extended_capabilities_len);
 507
 508         *out_ies = buf;
 509         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 510
 511         return 0;
 512 }
 513
 514 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 515                                 struct cfg80211_connect_params *connect,
 516                                 const u8 *prev_bssid)
 517 {
 518         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 519         struct cfg80211_bss *bss;
 520         int err;
 521
 522         if (!rdev->ops->auth || !rdev->ops->assoc)
 523                 return -EOPNOTSUPP;
 524
 525         if (wdev->current_bss) {
 526                 cfg80211_unhold_bss(wdev->current_bss);
 527                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 528                 wdev->current_bss = NULL;
 529
 530                 cfg80211_sme_free(wdev);
 531         }
 532
 533         if (WARN_ON(wdev->conn))
 534                 return -EINPROGRESS;
 535
 536         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 537         if (!wdev->conn)
 538                 return -ENOMEM;
 539
 540         /*
 541          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 542          */
 543         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 544         if (connect->bssid) {
 545                 wdev->conn->params.bssid = wdev->conn->bssid;
 546                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 547         }
 548
 549         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 550                                       &wdev->conn->ie,
 551                                       &wdev->conn->params.ie_len)) {
 552                 kfree(wdev->conn);
 553                 wdev->conn = NULL;
 554                 return -ENOMEM;
 555         }
 556         wdev->conn->params.ie = wdev->conn->ie;
 557
 558         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 559                 wdev->conn->auto_auth = true;
 560                 /* start with open system ... should mostly work */
 561                 wdev->conn->params.auth_type =
 562                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 563         } else {
 564                 wdev->conn->auto_auth = false;
 565         }
 566
 567         wdev->conn->params.ssid = wdev->ssid;
 568         wdev->conn->params.ssid_len = wdev->ssid_len;
 569
 570         /* see if we have the bss already */
 571         bss = cfg80211_get_conn_bss(wdev);
 572
 573         if (prev_bssid) {
 574                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 575                 wdev->conn->prev_bssid_valid = true;
 576         }
 577
 578         /* we're good if we have a matching bss struct */
 579         if (bss) {
 580                 enum nl80211_timeout_reason treason;
 581
 582                 err = cfg80211_conn_do_work(wdev, &treason);
 583                 cfg80211_put_bss(wdev->wiphy, bss);
 584         } else {
 585                 /* otherwise we'll need to scan for the AP first */
 586                 err = cfg80211_conn_scan(wdev);
 587
 588                 /*
 589                  * If we can't scan right now, then we need to scan again
 590                  * after the current scan finished, since the parameters
 591                  * changed (unless we find a good AP anyway).
 592                  */
 593                 if (err == -EBUSY) {
 594                         err = 0;
 595                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 596                 }
 597         }
 598
 599         if (err)
 600                 cfg80211_sme_free(wdev);
 601
 602         return err;
 603 }
 604
 605 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 606 {
 607         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 608         int err;
 609
 610         if (!wdev->conn)
 611                 return 0;
 612
 613         if (!rdev->ops->deauth)
 614                 return -EOPNOTSUPP;
 615
 616         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 617             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 618                 err = 0;
 619                 goto out;
 620         }
 621
 622         /* wdev->conn->params.bssid must be set if > SCANNING */
 623         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 624                                    wdev->conn->params.bssid,
 625                                    NULL, 0, reason, false);
 626  out:
 627         cfg80211_sme_free(wdev);
 628         return err;
 629 }
 630
 631 /*
 632  * code shared for in-device and software SME
 633  */
 634
 635 static bool cfg80211_is_all_idle(void)
 636 {
 637         struct cfg80211_registered_device *rdev;
 638         struct wireless_dev *wdev;
 639         bool is_all_idle = true;
 640
 641         /*
 642          * All devices must be idle as otherwise if you are actively
 643          * scanning some new beacon hints could be learned and would
 644          * count as new regulatory hints.
 645          */
 646         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 647                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 648                         wdev_lock(wdev);
 649                         if (wdev->conn || wdev->current_bss)
 650                                 is_all_idle = false;
 651                         wdev_unlock(wdev);
 652                 }
 653         }
 654
 655         return is_all_idle;
 656 }
 657
 658 static void disconnect_work(struct work_struct *work)
 659 {
 660         rtnl_lock();
 661         if (cfg80211_is_all_idle())
 662                 regulatory_hint_disconnect();
 663         rtnl_unlock();
 664 }
 665
 666 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 667
 668
 669 /*
 670  * API calls for drivers implementing connect/disconnect and
 671  * SME event handling
 672  */
 673
 674 /* This method must consume bss one way or another */
 675 void __cfg80211_connect_result(struct net_device *dev,
 676                                struct cfg80211_connect_resp_params *cr,
 677                                bool wextev)
 678 {
 679         struct wireless_dev *wdev = dev->ieee80211_ptr;
 680         const u8 *country_ie;
 681 #ifdef CONFIG_CFG80211_WEXT
 682         union iwreq_data wrqu;
 683 #endif
 684
 685         ASSERT_WDEV_LOCK(wdev);
 686
 687         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 688                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
 689                 cfg80211_put_bss(wdev->wiphy, cr->bss);
 690                 return;
 691         }
 692
 693         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 694                                     GFP_KERNEL);
 695
 696 #ifdef CONFIG_CFG80211_WEXT
 697         if (wextev) {
 698                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 699                         memset(&wrqu, 0, sizeof(wrqu));
 700                         wrqu.data.length = cr->req_ie_len;
 701                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 702                                             cr->req_ie);
 703                 }
 704
 705                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 706                         memset(&wrqu, 0, sizeof(wrqu));
 707                         wrqu.data.length = cr->resp_ie_len;
 708                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 709                                             cr->resp_ie);
 710                 }
 711
 712                 memset(&wrqu, 0, sizeof(wrqu));
 713                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 714                 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
 715                         memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
 716                         memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
 717                         wdev->wext.prev_bssid_valid = true;
 718                 }
 719                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 720         }
 721 #endif
 722
 723         if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
 724                 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
 725                 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
 726                                            wdev->ssid, wdev->ssid_len,
 727                                            wdev->conn_bss_type,
 728                                            IEEE80211_PRIVACY_ANY);
 729                 if (cr->bss)
 730                         cfg80211_hold_bss(bss_from_pub(cr->bss));
 731         }
 732
 733         if (wdev->current_bss) {
 734                 cfg80211_unhold_bss(wdev->current_bss);
 735                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 736                 wdev->current_bss = NULL;
 737         }
 738
 739         if (cr->status != WLAN_STATUS_SUCCESS) {
 740                 kzfree(wdev->connect_keys);
 741                 wdev->connect_keys = NULL;
 742                 wdev->ssid_len = 0;
 743                 wdev->conn_owner_nlportid = 0;
 744                 if (cr->bss) {
 745                         cfg80211_unhold_bss(bss_from_pub(cr->bss));
 746                         cfg80211_put_bss(wdev->wiphy, cr->bss);
 747                 }
 748                 cfg80211_sme_free(wdev);
 749                 return;
 750         }
 751
 752         if (WARN_ON(!cr->bss))
 753                 return;
 754
 755         wdev->current_bss = bss_from_pub(cr->bss);
 756
 757         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 758                 cfg80211_upload_connect_keys(wdev);
 759
 760         rcu_read_lock();
 761         country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
 762         if (!country_ie) {
 763                 rcu_read_unlock();
 764                 return;
 765         }
 766
 767         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
 768         rcu_read_unlock();
 769
 770         if (!country_ie)
 771                 return;
 772
 773         /*
 774          * ieee80211_bss_get_ie() ensures we can access:
 775          * - country_ie + 2, the start of the country ie data, and
 776          * - and country_ie[1] which is the IE length
 777          */
 778         regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
 779                                    country_ie + 2, country_ie[1]);
 780         kfree(country_ie);
 781 }
 782
 783 /* Consumes bss object one way or another */
 784 void cfg80211_connect_done(struct net_device *dev,
 785                            struct cfg80211_connect_resp_params *params,
 786                            gfp_t gfp)
 787 {
 788         struct wireless_dev *wdev = dev->ieee80211_ptr;
 789         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 790         struct cfg80211_event *ev;
 791         unsigned long flags;
 792         u8 *next;
 793
 794         if (params->bss) {
 795                 /* Make sure the bss entry provided by the driver is valid. */
 796                 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
 797
 798                 if (WARN_ON(list_empty(&ibss->list))) {
 799                         cfg80211_put_bss(wdev->wiphy, params->bss);
 800                         return;
 801                 }
 802         }
 803
 804         ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
 805                      params->req_ie_len + params->resp_ie_len +
 806                      params->fils.kek_len + params->fils.pmk_len +
 807                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
 808         if (!ev) {
 809                 cfg80211_put_bss(wdev->wiphy, params->bss);
 810                 return;
 811         }
 812
 813         ev->type = EVENT_CONNECT_RESULT;
 814         next = ((u8 *)ev) + sizeof(*ev);
 815         if (params->bssid) {
 816                 ev->cr.bssid = next;
 817                 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
 818                 next += ETH_ALEN;
 819         }
 820         if (params->req_ie_len) {
 821                 ev->cr.req_ie = next;
 822                 ev->cr.req_ie_len = params->req_ie_len;
 823                 memcpy((void *)ev->cr.req_ie, params->req_ie,
 824                        params->req_ie_len);
 825                 next += params->req_ie_len;
 826         }
 827         if (params->resp_ie_len) {
 828                 ev->cr.resp_ie = next;
 829                 ev->cr.resp_ie_len = params->resp_ie_len;
 830                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
 831                        params->resp_ie_len);
 832                 next += params->resp_ie_len;
 833         }
 834         if (params->fils.kek_len) {
 835                 ev->cr.fils.kek = next;
 836                 ev->cr.fils.kek_len = params->fils.kek_len;
 837                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
 838                        params->fils.kek_len);
 839                 next += params->fils.kek_len;
 840         }
 841         if (params->fils.pmk_len) {
 842                 ev->cr.fils.pmk = next;
 843                 ev->cr.fils.pmk_len = params->fils.pmk_len;
 844                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
 845                        params->fils.pmk_len);
 846                 next += params->fils.pmk_len;
 847         }
 848         if (params->fils.pmkid) {
 849                 ev->cr.fils.pmkid = next;
 850                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
 851                        WLAN_PMKID_LEN);
 852                 next += WLAN_PMKID_LEN;
 853         }
 854         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
 855         if (params->fils.update_erp_next_seq_num)
 856                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
 857         if (params->bss)
 858                 cfg80211_hold_bss(bss_from_pub(params->bss));
 859         ev->cr.bss = params->bss;
 860         ev->cr.status = params->status;
 861         ev->cr.timeout_reason = params->timeout_reason;
 862
 863         spin_lock_irqsave(&wdev->event_lock, flags);
 864         list_add_tail(&ev->list, &wdev->event_list);
 865         spin_unlock_irqrestore(&wdev->event_lock, flags);
 866         queue_work(cfg80211_wq, &rdev->event_work);
 867 }
 868 EXPORT_SYMBOL(cfg80211_connect_done);
 869
 870 /* Consumes bss object one way or another */
 871 void __cfg80211_roamed(struct wireless_dev *wdev,
 872                        struct cfg80211_roam_info *info)
 873 {
 874 #ifdef CONFIG_CFG80211_WEXT
 875         union iwreq_data wrqu;
 876 #endif
 877         ASSERT_WDEV_LOCK(wdev);
 878
 879         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 880                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 881                 goto out;
 882
 883         if (WARN_ON(!wdev->current_bss))
 884                 goto out;
 885
 886         cfg80211_unhold_bss(wdev->current_bss);
 887         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 888         wdev->current_bss = NULL;
 889
 890         if (WARN_ON(!info->bss))
 891                 return;
 892
 893         cfg80211_hold_bss(bss_from_pub(info->bss));
 894         wdev->current_bss = bss_from_pub(info->bss);
 895
 896         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
 897                             wdev->netdev, info, GFP_KERNEL);
 898
 899 #ifdef CONFIG_CFG80211_WEXT
 900         if (info->req_ie) {
 901                 memset(&wrqu, 0, sizeof(wrqu));
 902                 wrqu.data.length = info->req_ie_len;
 903                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 904                                     &wrqu, info->req_ie);
 905         }
 906
 907         if (info->resp_ie) {
 908                 memset(&wrqu, 0, sizeof(wrqu));
 909                 wrqu.data.length = info->resp_ie_len;
 910                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 911                                     &wrqu, info->resp_ie);
 912         }
 913
 914         memset(&wrqu, 0, sizeof(wrqu));
 915         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 916         memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
 917         memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
 918         wdev->wext.prev_bssid_valid = true;
 919         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 920 #endif
 921
 922         return;
 923 out:
 924         cfg80211_put_bss(wdev->wiphy, info->bss);
 925 }
 926
 927 /* Consumes info->bss object one way or another */
 928 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
 929                      gfp_t gfp)
 930 {
 931         struct wireless_dev *wdev = dev->ieee80211_ptr;
 932         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 933         struct cfg80211_event *ev;
 934         unsigned long flags;
 935         u8 *next;
 936
 937         if (!info->bss) {
 938                 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
 939                                              info->bssid, wdev->ssid,
 940                                              wdev->ssid_len,
 941                                              wdev->conn_bss_type,
 942                                              IEEE80211_PRIVACY_ANY);
 943         }
 944
 945         if (WARN_ON(!info->bss))
 946                 return;
 947
 948         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
 949                      info->fils.kek_len + info->fils.pmk_len +
 950                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
 951         if (!ev) {
 952                 cfg80211_put_bss(wdev->wiphy, info->bss);
 953                 return;
 954         }
 955
 956         ev->type = EVENT_ROAMED;
 957         next = ((u8 *)ev) + sizeof(*ev);
 958         if (info->req_ie_len) {
 959                 ev->rm.req_ie = next;
 960                 ev->rm.req_ie_len = info->req_ie_len;
 961                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
 962                 next += info->req_ie_len;
 963         }
 964         if (info->resp_ie_len) {
 965                 ev->rm.resp_ie = next;
 966                 ev->rm.resp_ie_len = info->resp_ie_len;
 967                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
 968                        info->resp_ie_len);
 969                 next += info->resp_ie_len;
 970         }
 971         if (info->fils.kek_len) {
 972                 ev->rm.fils.kek = next;
 973                 ev->rm.fils.kek_len = info->fils.kek_len;
 974                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
 975                        info->fils.kek_len);
 976                 next += info->fils.kek_len;
 977         }
 978         if (info->fils.pmk_len) {
 979                 ev->rm.fils.pmk = next;
 980                 ev->rm.fils.pmk_len = info->fils.pmk_len;
 981                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
 982                        info->fils.pmk_len);
 983                 next += info->fils.pmk_len;
 984         }
 985         if (info->fils.pmkid) {
 986                 ev->rm.fils.pmkid = next;
 987                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
 988                        WLAN_PMKID_LEN);
 989                 next += WLAN_PMKID_LEN;
 990         }
 991         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
 992         if (info->fils.update_erp_next_seq_num)
 993                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
 994         ev->rm.bss = info->bss;
 995
 996         spin_lock_irqsave(&wdev->event_lock, flags);
 997         list_add_tail(&ev->list, &wdev->event_list);
 998         spin_unlock_irqrestore(&wdev->event_lock, flags);
 999         queue_work(cfg80211_wq, &rdev->event_work);
1000 }
1001 EXPORT_SYMBOL(cfg80211_roamed);
1002
1003 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1004 {
1005         ASSERT_WDEV_LOCK(wdev);
1006
1007         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
1008                 return;
1009
1010         if (WARN_ON(!wdev->current_bss) ||
1011             WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
1012                 return;
1013
1014         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1015                                      bssid);
1016 }
1017
1018 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1019                               gfp_t gfp)
1020 {
1021         struct wireless_dev *wdev = dev->ieee80211_ptr;
1022         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1023         struct cfg80211_event *ev;
1024         unsigned long flags;
1025
1026         if (WARN_ON(!bssid))
1027                 return;
1028
1029         ev = kzalloc(sizeof(*ev), gfp);
1030         if (!ev)
1031                 return;
1032
1033         ev->type = EVENT_PORT_AUTHORIZED;
1034         memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1035
1036         /*
1037          * Use the wdev event list so that if there are pending
1038          * connected/roamed events, they will be reported first.
1039          */
1040         spin_lock_irqsave(&wdev->event_lock, flags);
1041         list_add_tail(&ev->list, &wdev->event_list);
1042         spin_unlock_irqrestore(&wdev->event_lock, flags);
1043         queue_work(cfg80211_wq, &rdev->event_work);
1044 }
1045 EXPORT_SYMBOL(cfg80211_port_authorized);
1046
1047 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1048                              size_t ie_len, u16 reason, bool from_ap)
1049 {
1050         struct wireless_dev *wdev = dev->ieee80211_ptr;
1051         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1052         int i;
1053 #ifdef CONFIG_CFG80211_WEXT
1054         union iwreq_data wrqu;
1055 #endif
1056
1057         ASSERT_WDEV_LOCK(wdev);
1058
1059         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1060                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1061                 return;
1062
1063         if (wdev->current_bss) {
1064                 cfg80211_unhold_bss(wdev->current_bss);
1065                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1066         }
1067
1068         wdev->current_bss = NULL;
1069         wdev->ssid_len = 0;
1070         wdev->conn_owner_nlportid = 0;
1071         kzfree(wdev->connect_keys);
1072         wdev->connect_keys = NULL;
1073
1074         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1075
1076         /* stop critical protocol if supported */
1077         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1078                 rdev->crit_proto_nlportid = 0;
1079                 rdev_crit_proto_stop(rdev, wdev);
1080         }
1081
1082         /*
1083          * Delete all the keys ... pairwise keys can't really
1084          * exist any more anyway, but default keys might.
1085          */
1086         if (rdev->ops->del_key)
1087                 for (i = 0; i < 6; i++)
1088                         rdev_del_key(rdev, dev, i, false, NULL);
1089
1090         rdev_set_qos_map(rdev, dev, NULL);
1091
1092 #ifdef CONFIG_CFG80211_WEXT
1093         memset(&wrqu, 0, sizeof(wrqu));
1094         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1095         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1096         wdev->wext.connect.ssid_len = 0;
1097 #endif
1098
1099         schedule_work(&cfg80211_disconnect_work);
1100 }
1101
1102 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1103                            const u8 *ie, size_t ie_len,
1104                            bool locally_generated, gfp_t gfp)
1105 {
1106         struct wireless_dev *wdev = dev->ieee80211_ptr;
1107         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1108         struct cfg80211_event *ev;
1109         unsigned long flags;
1110
1111         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1112         if (!ev)
1113                 return;
1114
1115         ev->type = EVENT_DISCONNECTED;
1116         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1117         ev->dc.ie_len = ie_len;
1118         memcpy((void *)ev->dc.ie, ie, ie_len);
1119         ev->dc.reason = reason;
1120         ev->dc.locally_generated = locally_generated;
1121
1122         spin_lock_irqsave(&wdev->event_lock, flags);
1123         list_add_tail(&ev->list, &wdev->event_list);
1124         spin_unlock_irqrestore(&wdev->event_lock, flags);
1125         queue_work(cfg80211_wq, &rdev->event_work);
1126 }
1127 EXPORT_SYMBOL(cfg80211_disconnected);
1128
1129 /*
1130  * API calls for nl80211/wext compatibility code
1131  */
1132 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1133                      struct net_device *dev,
1134                      struct cfg80211_connect_params *connect,
1135                      struct cfg80211_cached_keys *connkeys,
1136                      const u8 *prev_bssid)
1137 {
1138         struct wireless_dev *wdev = dev->ieee80211_ptr;
1139         int err;
1140
1141         ASSERT_WDEV_LOCK(wdev);
1142
1143         /*
1144          * If we have an ssid_len, we're trying to connect or are
1145          * already connected, so reject a new SSID unless it's the
1146          * same (which is the case for re-association.)
1147          */
1148         if (wdev->ssid_len &&
1149             (wdev->ssid_len != connect->ssid_len ||
1150              memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1151                 return -EALREADY;
1152
1153         /*
1154          * If connected, reject (re-)association unless prev_bssid
1155          * matches the current BSSID.
1156          */
1157         if (wdev->current_bss) {
1158                 if (!prev_bssid)
1159                         return -EALREADY;
1160                 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1161                         return -ENOTCONN;
1162         }
1163
1164         /*
1165          * Reject if we're in the process of connecting with WEP,
1166          * this case isn't very interesting and trying to handle
1167          * it would make the code much more complex.
1168          */
1169         if (wdev->connect_keys)
1170                 return -EINPROGRESS;
1171
1172         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1173                                   rdev->wiphy.ht_capa_mod_mask);
1174
1175         if (connkeys && connkeys->def >= 0) {
1176                 int idx;
1177                 u32 cipher;
1178
1179                 idx = connkeys->def;
1180                 cipher = connkeys->params[idx].cipher;
1181                 /* If given a WEP key we may need it for shared key auth */
1182                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1183                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1184                         connect->key_idx = idx;
1185                         connect->key = connkeys->params[idx].key;
1186                         connect->key_len = connkeys->params[idx].key_len;
1187
1188                         /*
1189                          * If ciphers are not set (e.g. when going through
1190                          * iwconfig), we have to set them appropriately here.
1191                          */
1192                         if (connect->crypto.cipher_group == 0)
1193                                 connect->crypto.cipher_group = cipher;
1194
1195                         if (connect->crypto.n_ciphers_pairwise == 0) {
1196                                 connect->crypto.n_ciphers_pairwise = 1;
1197                                 connect->crypto.ciphers_pairwise[0] = cipher;
1198                         }
1199                 }
1200
1201                 connect->crypto.wep_keys = connkeys->params;
1202                 connect->crypto.wep_tx_key = connkeys->def;
1203         } else {
1204                 if (WARN_ON(connkeys))
1205                         return -EINVAL;
1206         }
1207
1208         wdev->connect_keys = connkeys;
1209         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1210         wdev->ssid_len = connect->ssid_len;
1211
1212         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1213                                               IEEE80211_BSS_TYPE_ESS;
1214
1215         if (!rdev->ops->connect)
1216                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1217         else
1218                 err = rdev_connect(rdev, dev, connect);
1219
1220         if (err) {
1221                 wdev->connect_keys = NULL;
1222                 /*
1223                  * This could be reassoc getting refused, don't clear
1224                  * ssid_len in that case.
1225                  */
1226                 if (!wdev->current_bss)
1227                         wdev->ssid_len = 0;
1228                 return err;
1229         }
1230
1231         return 0;
1232 }
1233
1234 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1235                         struct net_device *dev, u16 reason, bool wextev)
1236 {
1237         struct wireless_dev *wdev = dev->ieee80211_ptr;
1238         int err = 0;
1239
1240         ASSERT_WDEV_LOCK(wdev);
1241
1242         kzfree(wdev->connect_keys);
1243         wdev->connect_keys = NULL;
1244
1245         wdev->conn_owner_nlportid = 0;
1246
1247         if (wdev->conn)
1248                 err = cfg80211_sme_disconnect(wdev, reason);
1249         else if (!rdev->ops->disconnect)
1250                 cfg80211_mlme_down(rdev, dev);
1251         else if (wdev->ssid_len)
1252                 err = rdev_disconnect(rdev, dev, reason);
1253
1254         /*
1255          * Clear ssid_len unless we actually were fully connected,
1256          * in which case cfg80211_disconnected() will take care of
1257          * this later.
1258          */
1259         if (!wdev->current_bss)
1260                 wdev->ssid_len = 0;
1261
1262         return err;
1263 }
1264
1265 /*
1266  * Used to clean up after the connection / connection attempt owner socket
1267  * disconnects
1268  */
1269 void cfg80211_autodisconnect_wk(struct work_struct *work)
1270 {
1271         struct wireless_dev *wdev =
1272                 container_of(work, struct wireless_dev, disconnect_wk);
1273         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1274
1275         wdev_lock(wdev);
1276
1277         if (wdev->conn_owner_nlportid) {
1278                 switch (wdev->iftype) {
1279                 case NL80211_IFTYPE_ADHOC:
1280                         cfg80211_leave_ibss(rdev, wdev->netdev, false);
1281                         break;
1282                 case NL80211_IFTYPE_AP:
1283                 case NL80211_IFTYPE_P2P_GO:
1284                         cfg80211_stop_ap(rdev, wdev->netdev, false);
1285                         break;
1286                 case NL80211_IFTYPE_MESH_POINT:
1287                         cfg80211_leave_mesh(rdev, wdev->netdev);
1288                         break;
1289                 case NL80211_IFTYPE_STATION:
1290                 case NL80211_IFTYPE_P2P_CLIENT:
1291                         /*
1292                          * Use disconnect_bssid if still connecting and
1293                          * ops->disconnect not implemented.  Otherwise we can
1294                          * use cfg80211_disconnect.
1295                          */
1296                         if (rdev->ops->disconnect || wdev->current_bss)
1297                                 cfg80211_disconnect(rdev, wdev->netdev,
1298                                                     WLAN_REASON_DEAUTH_LEAVING,
1299                                                     true);
1300                         else
1301                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1302                                                      wdev->disconnect_bssid,
1303                                                      NULL, 0,
1304                                                      WLAN_REASON_DEAUTH_LEAVING,
1305                                                      false);
1306                         break;
1307                 default:
1308                         break;
1309                 }
1310         }
1311
1312         wdev_unlock(wdev);
1313 }