net/wireless/sme.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SME code for cfg80211
   4  * both driver SME event handling and the SME implementation
   5  * (for nl80211's connect() and wext)
   6  *
   7  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   8  * Copyright (C) 2009, 2020 Intel Corporation. All rights reserved.
   9  * Copyright 2017       Intel Deutschland GmbH
  10  */
  11
  12 #include <linux/etherdevice.h>
  13 #include <linux/if_arp.h>
  14 #include <linux/slab.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/wireless.h>
  17 #include <linux/export.h>
  18 #include <net/iw_handler.h>
  19 #include <net/cfg80211.h>
  20 #include <net/rtnetlink.h>
  21 #include "nl80211.h"
  22 #include "reg.h"
  23 #include "rdev-ops.h"
  24
  25 /*
  26  * Software SME in cfg80211, using auth/assoc/deauth calls to the
  27  * driver. This is for implementing nl80211's connect/disconnect
  28  * and wireless extensions (if configured.)
  29  */
  30
  31 struct cfg80211_conn {
  32         struct cfg80211_connect_params params;
  33         /* these are sub-states of the _CONNECTING sme_state */
  34         enum {
  35                 CFG80211_CONN_SCANNING,
  36                 CFG80211_CONN_SCAN_AGAIN,
  37                 CFG80211_CONN_AUTHENTICATE_NEXT,
  38                 CFG80211_CONN_AUTHENTICATING,
  39                 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
  40                 CFG80211_CONN_ASSOCIATE_NEXT,
  41                 CFG80211_CONN_ASSOCIATING,
  42                 CFG80211_CONN_ASSOC_FAILED,
  43                 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
  44                 CFG80211_CONN_DEAUTH,
  45                 CFG80211_CONN_ABANDON,
  46                 CFG80211_CONN_CONNECTED,
  47         } state;
  48         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  49         const u8 *ie;
  50         size_t ie_len;
  51         bool auto_auth, prev_bssid_valid;
  52 };
  53
  54 static void cfg80211_sme_free(struct wireless_dev *wdev)
  55 {
  56         if (!wdev->conn)
  57                 return;
  58
  59         kfree(wdev->conn->ie);
  60         kfree(wdev->conn);
  61         wdev->conn = NULL;
  62 }
  63
  64 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  65 {
  66         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
  67         struct cfg80211_scan_request *request;
  68         int n_channels, err;
  69
  70         ASSERT_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                 fallthrough;
 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                 fallthrough;
 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          * Also if there is any other active beaconing interface we
 646          * need not issue a disconnect hint and reset any info such
 647          * as chan dfs state, etc.
 648          */
 649         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 650                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 651                         wdev_lock(wdev);
 652                         if (wdev->conn || wdev->current_bss ||
 653                             cfg80211_beaconing_iface_active(wdev))
 654                                 is_all_idle = false;
 655                         wdev_unlock(wdev);
 656                 }
 657         }
 658
 659         return is_all_idle;
 660 }
 661
 662 static void disconnect_work(struct work_struct *work)
 663 {
 664         rtnl_lock();
 665         if (cfg80211_is_all_idle())
 666                 regulatory_hint_disconnect();
 667         rtnl_unlock();
 668 }
 669
 670 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 671
 672
 673 /*
 674  * API calls for drivers implementing connect/disconnect and
 675  * SME event handling
 676  */
 677
 678 /* This method must consume bss one way or another */
 679 void __cfg80211_connect_result(struct net_device *dev,
 680                                struct cfg80211_connect_resp_params *cr,
 681                                bool wextev)
 682 {
 683         struct wireless_dev *wdev = dev->ieee80211_ptr;
 684         const u8 *country_ie;
 685 #ifdef CONFIG_CFG80211_WEXT
 686         union iwreq_data wrqu;
 687 #endif
 688
 689         ASSERT_WDEV_LOCK(wdev);
 690
 691         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 692                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) {
 693                 cfg80211_put_bss(wdev->wiphy, cr->bss);
 694                 return;
 695         }
 696
 697         wdev->unprot_beacon_reported = 0;
 698         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 699                                     GFP_KERNEL);
 700
 701 #ifdef CONFIG_CFG80211_WEXT
 702         if (wextev) {
 703                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 704                         memset(&wrqu, 0, sizeof(wrqu));
 705                         wrqu.data.length = cr->req_ie_len;
 706                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 707                                             cr->req_ie);
 708                 }
 709
 710                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 711                         memset(&wrqu, 0, sizeof(wrqu));
 712                         wrqu.data.length = cr->resp_ie_len;
 713                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 714                                             cr->resp_ie);
 715                 }
 716
 717                 memset(&wrqu, 0, sizeof(wrqu));
 718                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 719                 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) {
 720                         memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN);
 721                         memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN);
 722                         wdev->wext.prev_bssid_valid = true;
 723                 }
 724                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 725         }
 726 #endif
 727
 728         if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) {
 729                 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect);
 730                 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid,
 731                                            wdev->ssid, wdev->ssid_len,
 732                                            wdev->conn_bss_type,
 733                                            IEEE80211_PRIVACY_ANY);
 734                 if (cr->bss)
 735                         cfg80211_hold_bss(bss_from_pub(cr->bss));
 736         }
 737
 738         if (wdev->current_bss) {
 739                 cfg80211_unhold_bss(wdev->current_bss);
 740                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 741                 wdev->current_bss = NULL;
 742         }
 743
 744         if (cr->status != WLAN_STATUS_SUCCESS) {
 745                 kfree_sensitive(wdev->connect_keys);
 746                 wdev->connect_keys = NULL;
 747                 wdev->ssid_len = 0;
 748                 wdev->conn_owner_nlportid = 0;
 749                 if (cr->bss) {
 750                         cfg80211_unhold_bss(bss_from_pub(cr->bss));
 751                         cfg80211_put_bss(wdev->wiphy, cr->bss);
 752                 }
 753                 cfg80211_sme_free(wdev);
 754                 return;
 755         }
 756
 757         if (WARN_ON(!cr->bss))
 758                 return;
 759
 760         wdev->current_bss = bss_from_pub(cr->bss);
 761
 762         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 763                 cfg80211_upload_connect_keys(wdev);
 764
 765         rcu_read_lock();
 766         country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY);
 767         if (!country_ie) {
 768                 rcu_read_unlock();
 769                 return;
 770         }
 771
 772         country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC);
 773         rcu_read_unlock();
 774
 775         if (!country_ie)
 776                 return;
 777
 778         /*
 779          * ieee80211_bss_get_ie() ensures we can access:
 780          * - country_ie + 2, the start of the country ie data, and
 781          * - and country_ie[1] which is the IE length
 782          */
 783         regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band,
 784                                    country_ie + 2, country_ie[1]);
 785         kfree(country_ie);
 786 }
 787
 788 /* Consumes bss object one way or another */
 789 void cfg80211_connect_done(struct net_device *dev,
 790                            struct cfg80211_connect_resp_params *params,
 791                            gfp_t gfp)
 792 {
 793         struct wireless_dev *wdev = dev->ieee80211_ptr;
 794         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 795         struct cfg80211_event *ev;
 796         unsigned long flags;
 797         u8 *next;
 798
 799         if (params->bss) {
 800                 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss);
 801
 802                 if (list_empty(&ibss->list)) {
 803                         struct cfg80211_bss *found = NULL, *tmp = params->bss;
 804
 805                         found = cfg80211_get_bss(wdev->wiphy, NULL,
 806                                                  params->bss->bssid,
 807                                                  wdev->ssid, wdev->ssid_len,
 808                                                  wdev->conn_bss_type,
 809                                                  IEEE80211_PRIVACY_ANY);
 810                         if (found) {
 811                                 /* The same BSS is already updated so use it
 812                                  * instead, as it has latest info.
 813                                  */
 814                                 params->bss = found;
 815                         } else {
 816                                 /* Update with BSS provided by driver, it will
 817                                  * be freshly added and ref cnted, we can free
 818                                  * the old one.
 819                                  *
 820                                  * signal_valid can be false, as we are not
 821                                  * expecting the BSS to be found.
 822                                  *
 823                                  * keep the old timestamp to avoid confusion
 824                                  */
 825                                 cfg80211_bss_update(rdev, ibss, false,
 826                                                     ibss->ts);
 827                         }
 828
 829                         cfg80211_put_bss(wdev->wiphy, tmp);
 830                 }
 831         }
 832
 833         ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) +
 834                      params->req_ie_len + params->resp_ie_len +
 835                      params->fils.kek_len + params->fils.pmk_len +
 836                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
 837         if (!ev) {
 838                 cfg80211_put_bss(wdev->wiphy, params->bss);
 839                 return;
 840         }
 841
 842         ev->type = EVENT_CONNECT_RESULT;
 843         next = ((u8 *)ev) + sizeof(*ev);
 844         if (params->bssid) {
 845                 ev->cr.bssid = next;
 846                 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN);
 847                 next += ETH_ALEN;
 848         }
 849         if (params->req_ie_len) {
 850                 ev->cr.req_ie = next;
 851                 ev->cr.req_ie_len = params->req_ie_len;
 852                 memcpy((void *)ev->cr.req_ie, params->req_ie,
 853                        params->req_ie_len);
 854                 next += params->req_ie_len;
 855         }
 856         if (params->resp_ie_len) {
 857                 ev->cr.resp_ie = next;
 858                 ev->cr.resp_ie_len = params->resp_ie_len;
 859                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
 860                        params->resp_ie_len);
 861                 next += params->resp_ie_len;
 862         }
 863         if (params->fils.kek_len) {
 864                 ev->cr.fils.kek = next;
 865                 ev->cr.fils.kek_len = params->fils.kek_len;
 866                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
 867                        params->fils.kek_len);
 868                 next += params->fils.kek_len;
 869         }
 870         if (params->fils.pmk_len) {
 871                 ev->cr.fils.pmk = next;
 872                 ev->cr.fils.pmk_len = params->fils.pmk_len;
 873                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
 874                        params->fils.pmk_len);
 875                 next += params->fils.pmk_len;
 876         }
 877         if (params->fils.pmkid) {
 878                 ev->cr.fils.pmkid = next;
 879                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
 880                        WLAN_PMKID_LEN);
 881                 next += WLAN_PMKID_LEN;
 882         }
 883         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
 884         if (params->fils.update_erp_next_seq_num)
 885                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
 886         if (params->bss)
 887                 cfg80211_hold_bss(bss_from_pub(params->bss));
 888         ev->cr.bss = params->bss;
 889         ev->cr.status = params->status;
 890         ev->cr.timeout_reason = params->timeout_reason;
 891
 892         spin_lock_irqsave(&wdev->event_lock, flags);
 893         list_add_tail(&ev->list, &wdev->event_list);
 894         spin_unlock_irqrestore(&wdev->event_lock, flags);
 895         queue_work(cfg80211_wq, &rdev->event_work);
 896 }
 897 EXPORT_SYMBOL(cfg80211_connect_done);
 898
 899 /* Consumes bss object one way or another */
 900 void __cfg80211_roamed(struct wireless_dev *wdev,
 901                        struct cfg80211_roam_info *info)
 902 {
 903 #ifdef CONFIG_CFG80211_WEXT
 904         union iwreq_data wrqu;
 905 #endif
 906         ASSERT_WDEV_LOCK(wdev);
 907
 908         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 909                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 910                 goto out;
 911
 912         if (WARN_ON(!wdev->current_bss))
 913                 goto out;
 914
 915         cfg80211_unhold_bss(wdev->current_bss);
 916         cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
 917         wdev->current_bss = NULL;
 918
 919         if (WARN_ON(!info->bss))
 920                 return;
 921
 922         cfg80211_hold_bss(bss_from_pub(info->bss));
 923         wdev->current_bss = bss_from_pub(info->bss);
 924
 925         wdev->unprot_beacon_reported = 0;
 926         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
 927                             wdev->netdev, info, GFP_KERNEL);
 928
 929 #ifdef CONFIG_CFG80211_WEXT
 930         if (info->req_ie) {
 931                 memset(&wrqu, 0, sizeof(wrqu));
 932                 wrqu.data.length = info->req_ie_len;
 933                 wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
 934                                     &wrqu, info->req_ie);
 935         }
 936
 937         if (info->resp_ie) {
 938                 memset(&wrqu, 0, sizeof(wrqu));
 939                 wrqu.data.length = info->resp_ie_len;
 940                 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
 941                                     &wrqu, info->resp_ie);
 942         }
 943
 944         memset(&wrqu, 0, sizeof(wrqu));
 945         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 946         memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN);
 947         memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN);
 948         wdev->wext.prev_bssid_valid = true;
 949         wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
 950 #endif
 951
 952         return;
 953 out:
 954         cfg80211_put_bss(wdev->wiphy, info->bss);
 955 }
 956
 957 /* Consumes info->bss object one way or another */
 958 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
 959                      gfp_t gfp)
 960 {
 961         struct wireless_dev *wdev = dev->ieee80211_ptr;
 962         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 963         struct cfg80211_event *ev;
 964         unsigned long flags;
 965         u8 *next;
 966
 967         if (!info->bss) {
 968                 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel,
 969                                              info->bssid, wdev->ssid,
 970                                              wdev->ssid_len,
 971                                              wdev->conn_bss_type,
 972                                              IEEE80211_PRIVACY_ANY);
 973         }
 974
 975         if (WARN_ON(!info->bss))
 976                 return;
 977
 978         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
 979                      info->fils.kek_len + info->fils.pmk_len +
 980                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp);
 981         if (!ev) {
 982                 cfg80211_put_bss(wdev->wiphy, info->bss);
 983                 return;
 984         }
 985
 986         ev->type = EVENT_ROAMED;
 987         next = ((u8 *)ev) + sizeof(*ev);
 988         if (info->req_ie_len) {
 989                 ev->rm.req_ie = next;
 990                 ev->rm.req_ie_len = info->req_ie_len;
 991                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
 992                 next += info->req_ie_len;
 993         }
 994         if (info->resp_ie_len) {
 995                 ev->rm.resp_ie = next;
 996                 ev->rm.resp_ie_len = info->resp_ie_len;
 997                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
 998                        info->resp_ie_len);
 999                 next += info->resp_ie_len;
1000         }
1001         if (info->fils.kek_len) {
1002                 ev->rm.fils.kek = next;
1003                 ev->rm.fils.kek_len = info->fils.kek_len;
1004                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1005                        info->fils.kek_len);
1006                 next += info->fils.kek_len;
1007         }
1008         if (info->fils.pmk_len) {
1009                 ev->rm.fils.pmk = next;
1010                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1011                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1012                        info->fils.pmk_len);
1013                 next += info->fils.pmk_len;
1014         }
1015         if (info->fils.pmkid) {
1016                 ev->rm.fils.pmkid = next;
1017                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1018                        WLAN_PMKID_LEN);
1019                 next += WLAN_PMKID_LEN;
1020         }
1021         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1022         if (info->fils.update_erp_next_seq_num)
1023                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1024         ev->rm.bss = info->bss;
1025
1026         spin_lock_irqsave(&wdev->event_lock, flags);
1027         list_add_tail(&ev->list, &wdev->event_list);
1028         spin_unlock_irqrestore(&wdev->event_lock, flags);
1029         queue_work(cfg80211_wq, &rdev->event_work);
1030 }
1031 EXPORT_SYMBOL(cfg80211_roamed);
1032
1033 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1034 {
1035         ASSERT_WDEV_LOCK(wdev);
1036
1037         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
1038                 return;
1039
1040         if (WARN_ON(!wdev->current_bss) ||
1041             WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
1042                 return;
1043
1044         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1045                                      bssid);
1046 }
1047
1048 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1049                               gfp_t gfp)
1050 {
1051         struct wireless_dev *wdev = dev->ieee80211_ptr;
1052         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1053         struct cfg80211_event *ev;
1054         unsigned long flags;
1055
1056         if (WARN_ON(!bssid))
1057                 return;
1058
1059         ev = kzalloc(sizeof(*ev), gfp);
1060         if (!ev)
1061                 return;
1062
1063         ev->type = EVENT_PORT_AUTHORIZED;
1064         memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1065
1066         /*
1067          * Use the wdev event list so that if there are pending
1068          * connected/roamed events, they will be reported first.
1069          */
1070         spin_lock_irqsave(&wdev->event_lock, flags);
1071         list_add_tail(&ev->list, &wdev->event_list);
1072         spin_unlock_irqrestore(&wdev->event_lock, flags);
1073         queue_work(cfg80211_wq, &rdev->event_work);
1074 }
1075 EXPORT_SYMBOL(cfg80211_port_authorized);
1076
1077 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1078                              size_t ie_len, u16 reason, bool from_ap)
1079 {
1080         struct wireless_dev *wdev = dev->ieee80211_ptr;
1081         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1082         int i;
1083 #ifdef CONFIG_CFG80211_WEXT
1084         union iwreq_data wrqu;
1085 #endif
1086
1087         ASSERT_WDEV_LOCK(wdev);
1088
1089         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1090                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1091                 return;
1092
1093         if (wdev->current_bss) {
1094                 cfg80211_unhold_bss(wdev->current_bss);
1095                 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1096         }
1097
1098         wdev->current_bss = NULL;
1099         wdev->ssid_len = 0;
1100         wdev->conn_owner_nlportid = 0;
1101         kfree_sensitive(wdev->connect_keys);
1102         wdev->connect_keys = NULL;
1103
1104         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1105
1106         /* stop critical protocol if supported */
1107         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1108                 rdev->crit_proto_nlportid = 0;
1109                 rdev_crit_proto_stop(rdev, wdev);
1110         }
1111
1112         /*
1113          * Delete all the keys ... pairwise keys can't really
1114          * exist any more anyway, but default keys might.
1115          */
1116         if (rdev->ops->del_key) {
1117                 int max_key_idx = 5;
1118
1119                 if (wiphy_ext_feature_isset(
1120                             wdev->wiphy,
1121                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1122                     wiphy_ext_feature_isset(
1123                             wdev->wiphy,
1124                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1125                         max_key_idx = 7;
1126                 for (i = 0; i <= max_key_idx; i++)
1127                         rdev_del_key(rdev, dev, i, false, NULL);
1128         }
1129
1130         rdev_set_qos_map(rdev, dev, NULL);
1131
1132 #ifdef CONFIG_CFG80211_WEXT
1133         memset(&wrqu, 0, sizeof(wrqu));
1134         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1135         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1136         wdev->wext.connect.ssid_len = 0;
1137 #endif
1138
1139         schedule_work(&cfg80211_disconnect_work);
1140 }
1141
1142 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1143                            const u8 *ie, size_t ie_len,
1144                            bool locally_generated, gfp_t gfp)
1145 {
1146         struct wireless_dev *wdev = dev->ieee80211_ptr;
1147         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1148         struct cfg80211_event *ev;
1149         unsigned long flags;
1150
1151         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1152         if (!ev)
1153                 return;
1154
1155         ev->type = EVENT_DISCONNECTED;
1156         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1157         ev->dc.ie_len = ie_len;
1158         memcpy((void *)ev->dc.ie, ie, ie_len);
1159         ev->dc.reason = reason;
1160         ev->dc.locally_generated = locally_generated;
1161
1162         spin_lock_irqsave(&wdev->event_lock, flags);
1163         list_add_tail(&ev->list, &wdev->event_list);
1164         spin_unlock_irqrestore(&wdev->event_lock, flags);
1165         queue_work(cfg80211_wq, &rdev->event_work);
1166 }
1167 EXPORT_SYMBOL(cfg80211_disconnected);
1168
1169 /*
1170  * API calls for nl80211/wext compatibility code
1171  */
1172 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1173                      struct net_device *dev,
1174                      struct cfg80211_connect_params *connect,
1175                      struct cfg80211_cached_keys *connkeys,
1176                      const u8 *prev_bssid)
1177 {
1178         struct wireless_dev *wdev = dev->ieee80211_ptr;
1179         int err;
1180
1181         ASSERT_WDEV_LOCK(wdev);
1182
1183         /*
1184          * If we have an ssid_len, we're trying to connect or are
1185          * already connected, so reject a new SSID unless it's the
1186          * same (which is the case for re-association.)
1187          */
1188         if (wdev->ssid_len &&
1189             (wdev->ssid_len != connect->ssid_len ||
1190              memcmp(wdev->ssid, connect->ssid, wdev->ssid_len)))
1191                 return -EALREADY;
1192
1193         /*
1194          * If connected, reject (re-)association unless prev_bssid
1195          * matches the current BSSID.
1196          */
1197         if (wdev->current_bss) {
1198                 if (!prev_bssid)
1199                         return -EALREADY;
1200                 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid))
1201                         return -ENOTCONN;
1202         }
1203
1204         /*
1205          * Reject if we're in the process of connecting with WEP,
1206          * this case isn't very interesting and trying to handle
1207          * it would make the code much more complex.
1208          */
1209         if (wdev->connect_keys)
1210                 return -EINPROGRESS;
1211
1212         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1213                                   rdev->wiphy.ht_capa_mod_mask);
1214         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1215                                    rdev->wiphy.vht_capa_mod_mask);
1216
1217         if (connkeys && connkeys->def >= 0) {
1218                 int idx;
1219                 u32 cipher;
1220
1221                 idx = connkeys->def;
1222                 cipher = connkeys->params[idx].cipher;
1223                 /* If given a WEP key we may need it for shared key auth */
1224                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1225                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1226                         connect->key_idx = idx;
1227                         connect->key = connkeys->params[idx].key;
1228                         connect->key_len = connkeys->params[idx].key_len;
1229
1230                         /*
1231                          * If ciphers are not set (e.g. when going through
1232                          * iwconfig), we have to set them appropriately here.
1233                          */
1234                         if (connect->crypto.cipher_group == 0)
1235                                 connect->crypto.cipher_group = cipher;
1236
1237                         if (connect->crypto.n_ciphers_pairwise == 0) {
1238                                 connect->crypto.n_ciphers_pairwise = 1;
1239                                 connect->crypto.ciphers_pairwise[0] = cipher;
1240                         }
1241                 }
1242
1243                 connect->crypto.wep_keys = connkeys->params;
1244                 connect->crypto.wep_tx_key = connkeys->def;
1245         } else {
1246                 if (WARN_ON(connkeys))
1247                         return -EINVAL;
1248         }
1249
1250         wdev->connect_keys = connkeys;
1251         memcpy(wdev->ssid, connect->ssid, connect->ssid_len);
1252         wdev->ssid_len = connect->ssid_len;
1253
1254         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1255                                               IEEE80211_BSS_TYPE_ESS;
1256
1257         if (!rdev->ops->connect)
1258                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1259         else
1260                 err = rdev_connect(rdev, dev, connect);
1261
1262         if (err) {
1263                 wdev->connect_keys = NULL;
1264                 /*
1265                  * This could be reassoc getting refused, don't clear
1266                  * ssid_len in that case.
1267                  */
1268                 if (!wdev->current_bss)
1269                         wdev->ssid_len = 0;
1270                 return err;
1271         }
1272
1273         return 0;
1274 }
1275
1276 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1277                         struct net_device *dev, u16 reason, bool wextev)
1278 {
1279         struct wireless_dev *wdev = dev->ieee80211_ptr;
1280         int err = 0;
1281
1282         ASSERT_WDEV_LOCK(wdev);
1283
1284         kfree_sensitive(wdev->connect_keys);
1285         wdev->connect_keys = NULL;
1286
1287         wdev->conn_owner_nlportid = 0;
1288
1289         if (wdev->conn)
1290                 err = cfg80211_sme_disconnect(wdev, reason);
1291         else if (!rdev->ops->disconnect)
1292                 cfg80211_mlme_down(rdev, dev);
1293         else if (wdev->ssid_len)
1294                 err = rdev_disconnect(rdev, dev, reason);
1295
1296         /*
1297          * Clear ssid_len unless we actually were fully connected,
1298          * in which case cfg80211_disconnected() will take care of
1299          * this later.
1300          */
1301         if (!wdev->current_bss)
1302                 wdev->ssid_len = 0;
1303
1304         return err;
1305 }
1306
1307 /*
1308  * Used to clean up after the connection / connection attempt owner socket
1309  * disconnects
1310  */
1311 void cfg80211_autodisconnect_wk(struct work_struct *work)
1312 {
1313         struct wireless_dev *wdev =
1314                 container_of(work, struct wireless_dev, disconnect_wk);
1315         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1316
1317         wdev_lock(wdev);
1318
1319         if (wdev->conn_owner_nlportid) {
1320                 switch (wdev->iftype) {
1321                 case NL80211_IFTYPE_ADHOC:
1322                         __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1323                         break;
1324                 case NL80211_IFTYPE_AP:
1325                 case NL80211_IFTYPE_P2P_GO:
1326                         __cfg80211_stop_ap(rdev, wdev->netdev, false);
1327                         break;
1328                 case NL80211_IFTYPE_MESH_POINT:
1329                         __cfg80211_leave_mesh(rdev, wdev->netdev);
1330                         break;
1331                 case NL80211_IFTYPE_STATION:
1332                 case NL80211_IFTYPE_P2P_CLIENT:
1333                         /*
1334                          * Use disconnect_bssid if still connecting and
1335                          * ops->disconnect not implemented.  Otherwise we can
1336                          * use cfg80211_disconnect.
1337                          */
1338                         if (rdev->ops->disconnect || wdev->current_bss)
1339                                 cfg80211_disconnect(rdev, wdev->netdev,
1340                                                     WLAN_REASON_DEAUTH_LEAVING,
1341                                                     true);
1342                         else
1343                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1344                                                      wdev->disconnect_bssid,
1345                                                      NULL, 0,
1346                                                      WLAN_REASON_DEAUTH_LEAVING,
1347                                                      false);
1348                         break;
1349                 default:
1350                         break;
1351                 }
1352         }
1353
1354         wdev_unlock(wdev);
1355 }