net/wireless/sme.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SME code for cfg80211
   4  * both driver SME event handling and the SME implementation
   5  * (for nl80211's connect() and wext)
   6  *
   7  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   8  * Copyright (C) 2009, 2020, 2022 Intel Corporation. All rights reserved.
   9  * Copyright 2017       Intel Deutschland GmbH
  10  */
  11
  12 #include <linux/etherdevice.h>
  13 #include <linux/if_arp.h>
  14 #include <linux/slab.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/wireless.h>
  17 #include <linux/export.h>
  18 #include <net/iw_handler.h>
  19 #include <net/cfg80211.h>
  20 #include <net/rtnetlink.h>
  21 #include "nl80211.h"
  22 #include "reg.h"
  23 #include "rdev-ops.h"
  24
  25 /*
  26  * Software SME in cfg80211, using auth/assoc/deauth calls to the
  27  * driver. This is for implementing nl80211's connect/disconnect
  28  * and wireless extensions (if configured.)
  29  */
  30
  31 struct cfg80211_conn {
  32         struct cfg80211_connect_params params;
  33         /* these are sub-states of the _CONNECTING sme_state */
  34         enum {
  35                 CFG80211_CONN_SCANNING,
  36                 CFG80211_CONN_SCAN_AGAIN,
  37                 CFG80211_CONN_AUTHENTICATE_NEXT,
  38                 CFG80211_CONN_AUTHENTICATING,
  39                 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
  40                 CFG80211_CONN_ASSOCIATE_NEXT,
  41                 CFG80211_CONN_ASSOCIATING,
  42                 CFG80211_CONN_ASSOC_FAILED,
  43                 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
  44                 CFG80211_CONN_DEAUTH,
  45                 CFG80211_CONN_ABANDON,
  46                 CFG80211_CONN_CONNECTED,
  47         } state;
  48         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  49         const u8 *ie;
  50         size_t ie_len;
  51         bool auto_auth, prev_bssid_valid;
  52 };
  53
  54 static void cfg80211_sme_free(struct wireless_dev *wdev)
  55 {
  56         if (!wdev->conn)
  57                 return;
  58
  59         kfree(wdev->conn->ie);
  60         kfree(wdev->conn);
  61         wdev->conn = NULL;
  62 }
  63
  64 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  65 {
  66         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
  67         struct cfg80211_scan_request *request;
  68         int n_channels, err;
  69
  70         ASSERT_WDEV_LOCK(wdev);
  71
  72         if (rdev->scan_req || rdev->scan_msg)
  73                 return -EBUSY;
  74
  75         if (wdev->conn->params.channel)
  76                 n_channels = 1;
  77         else
  78                 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy);
  79
  80         request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) +
  81                           sizeof(request->channels[0]) * n_channels,
  82                           GFP_KERNEL);
  83         if (!request)
  84                 return -ENOMEM;
  85
  86         if (wdev->conn->params.channel) {
  87                 enum nl80211_band band = wdev->conn->params.channel->band;
  88                 struct ieee80211_supported_band *sband =
  89                         wdev->wiphy->bands[band];
  90
  91                 if (!sband) {
  92                         kfree(request);
  93                         return -EINVAL;
  94                 }
  95                 request->channels[0] = wdev->conn->params.channel;
  96                 request->rates[band] = (1 << sband->n_bitrates) - 1;
  97         } else {
  98                 int i = 0, j;
  99                 enum nl80211_band band;
 100                 struct ieee80211_supported_band *bands;
 101                 struct ieee80211_channel *channel;
 102
 103                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
 104                         bands = wdev->wiphy->bands[band];
 105                         if (!bands)
 106                                 continue;
 107                         for (j = 0; j < bands->n_channels; j++) {
 108                                 channel = &bands->channels[j];
 109                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 110                                         continue;
 111                                 request->channels[i++] = channel;
 112                         }
 113                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 114                 }
 115                 n_channels = i;
 116         }
 117         request->n_channels = n_channels;
 118         request->ssids = (void *)&request->channels[n_channels];
 119         request->n_ssids = 1;
 120
 121         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 122                 wdev->conn->params.ssid_len);
 123         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 124
 125         eth_broadcast_addr(request->bssid);
 126
 127         request->wdev = wdev;
 128         request->wiphy = &rdev->wiphy;
 129         request->scan_start = jiffies;
 130
 131         rdev->scan_req = request;
 132
 133         err = rdev_scan(rdev, request);
 134         if (!err) {
 135                 wdev->conn->state = CFG80211_CONN_SCANNING;
 136                 nl80211_send_scan_start(rdev, wdev);
 137                 dev_hold(wdev->netdev);
 138         } else {
 139                 rdev->scan_req = NULL;
 140                 kfree(request);
 141         }
 142         return err;
 143 }
 144
 145 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 146                                  enum nl80211_timeout_reason *treason)
 147 {
 148         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 149         struct cfg80211_connect_params *params;
 150         struct cfg80211_auth_request auth_req = {};
 151         struct cfg80211_assoc_request req = {};
 152         int err;
 153
 154         ASSERT_WDEV_LOCK(wdev);
 155
 156         if (!wdev->conn)
 157                 return 0;
 158
 159         params = &wdev->conn->params;
 160
 161         switch (wdev->conn->state) {
 162         case CFG80211_CONN_SCANNING:
 163                 /* didn't find it during scan ... */
 164                 return -ENOENT;
 165         case CFG80211_CONN_SCAN_AGAIN:
 166                 return cfg80211_conn_scan(wdev);
 167         case CFG80211_CONN_AUTHENTICATE_NEXT:
 168                 if (WARN_ON(!rdev->ops->auth))
 169                         return -EOPNOTSUPP;
 170                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 171                 auth_req.key = params->key;
 172                 auth_req.key_len = params->key_len;
 173                 auth_req.key_idx = params->key_idx;
 174                 auth_req.auth_type = params->auth_type;
 175                 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 176                                                 params->bssid,
 177                                                 params->ssid, params->ssid_len,
 178                                                 IEEE80211_BSS_TYPE_ESS,
 179                                                 IEEE80211_PRIVACY_ANY);
 180                 auth_req.link_id = -1;
 181                 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
 182                 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
 183                 return err;
 184         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 185                 *treason = NL80211_TIMEOUT_AUTH;
 186                 return -ENOTCONN;
 187         case CFG80211_CONN_ASSOCIATE_NEXT:
 188                 if (WARN_ON(!rdev->ops->assoc))
 189                         return -EOPNOTSUPP;
 190                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 191                 if (wdev->conn->prev_bssid_valid)
 192                         req.prev_bssid = wdev->conn->prev_bssid;
 193                 req.ie = params->ie;
 194                 req.ie_len = params->ie_len;
 195                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 196                 req.crypto = params->crypto;
 197                 req.flags = params->flags;
 198                 req.ht_capa = params->ht_capa;
 199                 req.ht_capa_mask = params->ht_capa_mask;
 200                 req.vht_capa = params->vht_capa;
 201                 req.vht_capa_mask = params->vht_capa_mask;
 202                 req.link_id = -1;
 203
 204                 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 205                                            params->bssid,
 206                                            params->ssid, params->ssid_len,
 207                                            IEEE80211_BSS_TYPE_ESS,
 208                                            IEEE80211_PRIVACY_ANY);
 209                 if (!req.bss) {
 210                         err = -ENOENT;
 211                 } else {
 212                         err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req);
 213                         cfg80211_put_bss(&rdev->wiphy, req.bss);
 214                 }
 215
 216                 if (err)
 217                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 218                                              NULL, 0,
 219                                              WLAN_REASON_DEAUTH_LEAVING,
 220                                              false);
 221                 return err;
 222         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 223                 *treason = NL80211_TIMEOUT_ASSOC;
 224                 fallthrough;
 225         case CFG80211_CONN_ASSOC_FAILED:
 226                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 227                                      NULL, 0,
 228                                      WLAN_REASON_DEAUTH_LEAVING, false);
 229                 return -ENOTCONN;
 230         case CFG80211_CONN_DEAUTH:
 231                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 232                                      NULL, 0,
 233                                      WLAN_REASON_DEAUTH_LEAVING, false);
 234                 fallthrough;
 235         case CFG80211_CONN_ABANDON:
 236                 /* free directly, disconnected event already sent */
 237                 cfg80211_sme_free(wdev);
 238                 return 0;
 239         default:
 240                 return 0;
 241         }
 242 }
 243
 244 void cfg80211_conn_work(struct work_struct *work)
 245 {
 246         struct cfg80211_registered_device *rdev =
 247                 container_of(work, struct cfg80211_registered_device, conn_work);
 248         struct wireless_dev *wdev;
 249         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 250         enum nl80211_timeout_reason treason;
 251
 252         wiphy_lock(&rdev->wiphy);
 253
 254         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 255                 if (!wdev->netdev)
 256                         continue;
 257
 258                 wdev_lock(wdev);
 259                 if (!netif_running(wdev->netdev)) {
 260                         wdev_unlock(wdev);
 261                         continue;
 262                 }
 263                 if (!wdev->conn ||
 264                     wdev->conn->state == CFG80211_CONN_CONNECTED) {
 265                         wdev_unlock(wdev);
 266                         continue;
 267                 }
 268                 if (wdev->conn->params.bssid) {
 269                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 270                         bssid = bssid_buf;
 271                 }
 272                 treason = NL80211_TIMEOUT_UNSPECIFIED;
 273                 if (cfg80211_conn_do_work(wdev, &treason)) {
 274                         struct cfg80211_connect_resp_params cr;
 275
 276                         memset(&cr, 0, sizeof(cr));
 277                         cr.status = -1;
 278                         cr.links[0].bssid = bssid;
 279                         cr.timeout_reason = treason;
 280                         __cfg80211_connect_result(wdev->netdev, &cr, false);
 281                 }
 282                 wdev_unlock(wdev);
 283         }
 284
 285         wiphy_unlock(&rdev->wiphy);
 286 }
 287
 288 /* Returned bss is reference counted and must be cleaned up appropriately. */
 289 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 290 {
 291         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 292         struct cfg80211_bss *bss;
 293
 294         ASSERT_WDEV_LOCK(wdev);
 295
 296         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 297                                wdev->conn->params.bssid,
 298                                wdev->conn->params.ssid,
 299                                wdev->conn->params.ssid_len,
 300                                wdev->conn_bss_type,
 301                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 302         if (!bss)
 303                 return NULL;
 304
 305         memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN);
 306         wdev->conn->params.bssid = wdev->conn->bssid;
 307         wdev->conn->params.channel = bss->channel;
 308         wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 309         schedule_work(&rdev->conn_work);
 310
 311         return bss;
 312 }
 313
 314 static void __cfg80211_sme_scan_done(struct net_device *dev)
 315 {
 316         struct wireless_dev *wdev = dev->ieee80211_ptr;
 317         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 318         struct cfg80211_bss *bss;
 319
 320         ASSERT_WDEV_LOCK(wdev);
 321
 322         if (!wdev->conn)
 323                 return;
 324
 325         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 326             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 327                 return;
 328
 329         bss = cfg80211_get_conn_bss(wdev);
 330         if (bss)
 331                 cfg80211_put_bss(&rdev->wiphy, bss);
 332         else
 333                 schedule_work(&rdev->conn_work);
 334 }
 335
 336 void cfg80211_sme_scan_done(struct net_device *dev)
 337 {
 338         struct wireless_dev *wdev = dev->ieee80211_ptr;
 339
 340         wdev_lock(wdev);
 341         __cfg80211_sme_scan_done(dev);
 342         wdev_unlock(wdev);
 343 }
 344
 345 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 346 {
 347         struct wiphy *wiphy = wdev->wiphy;
 348         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 349         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 350         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 351
 352         ASSERT_WDEV_LOCK(wdev);
 353
 354         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 355                 return;
 356
 357         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 358             wdev->conn->auto_auth &&
 359             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 360                 /* select automatically between only open, shared, leap */
 361                 switch (wdev->conn->params.auth_type) {
 362                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 363                         if (wdev->connect_keys)
 364                                 wdev->conn->params.auth_type =
 365                                         NL80211_AUTHTYPE_SHARED_KEY;
 366                         else
 367                                 wdev->conn->params.auth_type =
 368                                         NL80211_AUTHTYPE_NETWORK_EAP;
 369                         break;
 370                 case NL80211_AUTHTYPE_SHARED_KEY:
 371                         wdev->conn->params.auth_type =
 372                                 NL80211_AUTHTYPE_NETWORK_EAP;
 373                         break;
 374                 default:
 375                         /* huh? */
 376                         wdev->conn->params.auth_type =
 377                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 378                         break;
 379                 }
 380                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 381                 schedule_work(&rdev->conn_work);
 382         } else if (status_code != WLAN_STATUS_SUCCESS) {
 383                 struct cfg80211_connect_resp_params cr;
 384
 385                 memset(&cr, 0, sizeof(cr));
 386                 cr.status = status_code;
 387                 cr.links[0].bssid = mgmt->bssid;
 388                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 389                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 390         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 391                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 392                 schedule_work(&rdev->conn_work);
 393         }
 394 }
 395
 396 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 397 {
 398         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 399
 400         if (!wdev->conn)
 401                 return false;
 402
 403         if (status == WLAN_STATUS_SUCCESS) {
 404                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 405                 return false;
 406         }
 407
 408         if (wdev->conn->prev_bssid_valid) {
 409                 /*
 410                  * Some stupid APs don't accept reassoc, so we
 411                  * need to fall back to trying regular assoc;
 412                  * return true so no event is sent to userspace.
 413                  */
 414                 wdev->conn->prev_bssid_valid = false;
 415                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 416                 schedule_work(&rdev->conn_work);
 417                 return true;
 418         }
 419
 420         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 421         schedule_work(&rdev->conn_work);
 422         return false;
 423 }
 424
 425 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 426 {
 427         cfg80211_sme_free(wdev);
 428 }
 429
 430 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 431 {
 432         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 433
 434         if (!wdev->conn)
 435                 return;
 436
 437         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 438         schedule_work(&rdev->conn_work);
 439 }
 440
 441 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 442 {
 443         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 444
 445         if (!wdev->conn)
 446                 return;
 447
 448         wdev->conn->state = CFG80211_CONN_DEAUTH;
 449         schedule_work(&rdev->conn_work);
 450 }
 451
 452 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 453 {
 454         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 455
 456         if (!wdev->conn)
 457                 return;
 458
 459         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 460         schedule_work(&rdev->conn_work);
 461 }
 462
 463 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 464 {
 465         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 466
 467         if (!wdev->conn)
 468                 return;
 469
 470         wdev->conn->state = CFG80211_CONN_ABANDON;
 471         schedule_work(&rdev->conn_work);
 472 }
 473
 474 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
 475 {
 476         unsigned int link;
 477
 478         for_each_valid_link(wdev, link) {
 479                 if (!wdev->links[link].client.current_bss)
 480                         continue;
 481                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 482                 cfg80211_put_bss(wdev->wiphy,
 483                                  &wdev->links[link].client.current_bss->pub);
 484                 wdev->links[link].client.current_bss = NULL;
 485         }
 486 }
 487
 488 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 489                                      const u8 *ies, size_t ies_len,
 490                                      const u8 **out_ies, size_t *out_ies_len)
 491 {
 492         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 493         u8 *buf;
 494         size_t offs;
 495
 496         if (!rdev->wiphy.extended_capabilities_len ||
 497             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 498                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 499                 if (!*out_ies)
 500                         return -ENOMEM;
 501                 *out_ies_len = ies_len;
 502                 return 0;
 503         }
 504
 505         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 506                       GFP_KERNEL);
 507         if (!buf)
 508                 return -ENOMEM;
 509
 510         if (ies_len) {
 511                 static const u8 before_extcapa[] = {
 512                         /* not listing IEs expected to be created by driver */
 513                         WLAN_EID_RSN,
 514                         WLAN_EID_QOS_CAPA,
 515                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 516                         WLAN_EID_MOBILITY_DOMAIN,
 517                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 518                         WLAN_EID_BSS_COEX_2040,
 519                 };
 520
 521                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 522                                           ARRAY_SIZE(before_extcapa), 0);
 523                 memcpy(buf, ies, offs);
 524                 /* leave a whole for extended capabilities IE */
 525                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 526                        ies + offs, ies_len - offs);
 527         } else {
 528                 offs = 0;
 529         }
 530
 531         /* place extended capabilities IE (with only driver capabilities) */
 532         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 533         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 534         memcpy(buf + offs + 2,
 535                rdev->wiphy.extended_capabilities,
 536                rdev->wiphy.extended_capabilities_len);
 537
 538         *out_ies = buf;
 539         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 540
 541         return 0;
 542 }
 543
 544 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 545                                 struct cfg80211_connect_params *connect,
 546                                 const u8 *prev_bssid)
 547 {
 548         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 549         struct cfg80211_bss *bss;
 550         int err;
 551
 552         if (!rdev->ops->auth || !rdev->ops->assoc)
 553                 return -EOPNOTSUPP;
 554
 555         cfg80211_wdev_release_bsses(wdev);
 556
 557         if (wdev->connected) {
 558                 cfg80211_sme_free(wdev);
 559                 wdev->connected = false;
 560         }
 561
 562         if (wdev->conn)
 563                 return -EINPROGRESS;
 564
 565         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 566         if (!wdev->conn)
 567                 return -ENOMEM;
 568
 569         /*
 570          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 571          */
 572         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 573         if (connect->bssid) {
 574                 wdev->conn->params.bssid = wdev->conn->bssid;
 575                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 576         }
 577
 578         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 579                                       &wdev->conn->ie,
 580                                       &wdev->conn->params.ie_len)) {
 581                 kfree(wdev->conn);
 582                 wdev->conn = NULL;
 583                 return -ENOMEM;
 584         }
 585         wdev->conn->params.ie = wdev->conn->ie;
 586
 587         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 588                 wdev->conn->auto_auth = true;
 589                 /* start with open system ... should mostly work */
 590                 wdev->conn->params.auth_type =
 591                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 592         } else {
 593                 wdev->conn->auto_auth = false;
 594         }
 595
 596         wdev->conn->params.ssid = wdev->u.client.ssid;
 597         wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
 598
 599         /* see if we have the bss already */
 600         bss = cfg80211_get_conn_bss(wdev);
 601
 602         if (prev_bssid) {
 603                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 604                 wdev->conn->prev_bssid_valid = true;
 605         }
 606
 607         /* we're good if we have a matching bss struct */
 608         if (bss) {
 609                 enum nl80211_timeout_reason treason;
 610
 611                 err = cfg80211_conn_do_work(wdev, &treason);
 612                 cfg80211_put_bss(wdev->wiphy, bss);
 613         } else {
 614                 /* otherwise we'll need to scan for the AP first */
 615                 err = cfg80211_conn_scan(wdev);
 616
 617                 /*
 618                  * If we can't scan right now, then we need to scan again
 619                  * after the current scan finished, since the parameters
 620                  * changed (unless we find a good AP anyway).
 621                  */
 622                 if (err == -EBUSY) {
 623                         err = 0;
 624                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 625                 }
 626         }
 627
 628         if (err)
 629                 cfg80211_sme_free(wdev);
 630
 631         return err;
 632 }
 633
 634 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 635 {
 636         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 637         int err;
 638
 639         if (!wdev->conn)
 640                 return 0;
 641
 642         if (!rdev->ops->deauth)
 643                 return -EOPNOTSUPP;
 644
 645         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 646             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 647                 err = 0;
 648                 goto out;
 649         }
 650
 651         /* wdev->conn->params.bssid must be set if > SCANNING */
 652         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 653                                    wdev->conn->params.bssid,
 654                                    NULL, 0, reason, false);
 655  out:
 656         cfg80211_sme_free(wdev);
 657         return err;
 658 }
 659
 660 /*
 661  * code shared for in-device and software SME
 662  */
 663
 664 static bool cfg80211_is_all_idle(void)
 665 {
 666         struct cfg80211_registered_device *rdev;
 667         struct wireless_dev *wdev;
 668         bool is_all_idle = true;
 669
 670         /*
 671          * All devices must be idle as otherwise if you are actively
 672          * scanning some new beacon hints could be learned and would
 673          * count as new regulatory hints.
 674          * Also if there is any other active beaconing interface we
 675          * need not issue a disconnect hint and reset any info such
 676          * as chan dfs state, etc.
 677          */
 678         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 679                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 680                         wdev_lock(wdev);
 681                         if (wdev->conn || wdev->connected ||
 682                             cfg80211_beaconing_iface_active(wdev))
 683                                 is_all_idle = false;
 684                         wdev_unlock(wdev);
 685                 }
 686         }
 687
 688         return is_all_idle;
 689 }
 690
 691 static void disconnect_work(struct work_struct *work)
 692 {
 693         rtnl_lock();
 694         if (cfg80211_is_all_idle())
 695                 regulatory_hint_disconnect();
 696         rtnl_unlock();
 697 }
 698
 699 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 700
 701 static void
 702 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
 703                                       struct cfg80211_connect_resp_params *cr)
 704 {
 705         unsigned int link;
 706
 707         for_each_valid_link(cr, link) {
 708                 if (!cr->links[link].bss)
 709                         continue;
 710                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 711                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 712         }
 713 }
 714
 715 /*
 716  * API calls for drivers implementing connect/disconnect and
 717  * SME event handling
 718  */
 719
 720 /* This method must consume bss one way or another */
 721 void __cfg80211_connect_result(struct net_device *dev,
 722                                struct cfg80211_connect_resp_params *cr,
 723                                bool wextev)
 724 {
 725         struct wireless_dev *wdev = dev->ieee80211_ptr;
 726         const struct element *country_elem = NULL;
 727         const u8 *country_data;
 728         u8 country_datalen;
 729 #ifdef CONFIG_CFG80211_WEXT
 730         union iwreq_data wrqu;
 731 #endif
 732         unsigned int link;
 733         const u8 *connected_addr;
 734         bool bss_not_found = false;
 735
 736         ASSERT_WDEV_LOCK(wdev);
 737
 738         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 739                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 740                 goto out;
 741
 742         if (cr->valid_links) {
 743                 if (WARN_ON(!cr->ap_mld_addr))
 744                         goto out;
 745
 746                 for_each_valid_link(cr, link) {
 747                         if (WARN_ON(!cr->links[link].addr))
 748                                 goto out;
 749                 }
 750
 751                 if (WARN_ON(wdev->connect_keys))
 752                         goto out;
 753         }
 754
 755         wdev->unprot_beacon_reported = 0;
 756         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 757                                     GFP_KERNEL);
 758         connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
 759
 760 #ifdef CONFIG_CFG80211_WEXT
 761         if (wextev && !cr->valid_links) {
 762                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 763                         memset(&wrqu, 0, sizeof(wrqu));
 764                         wrqu.data.length = cr->req_ie_len;
 765                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 766                                             cr->req_ie);
 767                 }
 768
 769                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 770                         memset(&wrqu, 0, sizeof(wrqu));
 771                         wrqu.data.length = cr->resp_ie_len;
 772                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 773                                             cr->resp_ie);
 774                 }
 775
 776                 memset(&wrqu, 0, sizeof(wrqu));
 777                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 778                 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
 779                         memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
 780                         memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
 781                         wdev->wext.prev_bssid_valid = true;
 782                 }
 783                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 784         }
 785 #endif
 786
 787         if (cr->status == WLAN_STATUS_SUCCESS) {
 788                 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
 789                         for_each_valid_link(cr, link) {
 790                                 if (WARN_ON_ONCE(!cr->links[link].bss))
 791                                         break;
 792                         }
 793                 }
 794
 795                 for_each_valid_link(cr, link) {
 796                         if (cr->links[link].bss)
 797                                 continue;
 798
 799                         cr->links[link].bss =
 800                                 cfg80211_get_bss(wdev->wiphy, NULL,
 801                                                  cr->links[link].bssid,
 802                                                  wdev->u.client.ssid,
 803                                                  wdev->u.client.ssid_len,
 804                                                  wdev->conn_bss_type,
 805                                                  IEEE80211_PRIVACY_ANY);
 806                         if (!cr->links[link].bss) {
 807                                 bss_not_found = true;
 808                                 break;
 809                         }
 810                         cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
 811                 }
 812         }
 813
 814         cfg80211_wdev_release_bsses(wdev);
 815
 816         if (cr->status != WLAN_STATUS_SUCCESS) {
 817                 kfree_sensitive(wdev->connect_keys);
 818                 wdev->connect_keys = NULL;
 819                 wdev->u.client.ssid_len = 0;
 820                 wdev->conn_owner_nlportid = 0;
 821                 cfg80211_connect_result_release_bsses(wdev, cr);
 822                 cfg80211_sme_free(wdev);
 823                 return;
 824         }
 825
 826         if (WARN_ON(bss_not_found)) {
 827                 cfg80211_connect_result_release_bsses(wdev, cr);
 828                 return;
 829         }
 830
 831         memset(wdev->links, 0, sizeof(wdev->links));
 832         wdev->valid_links = cr->valid_links;
 833         for_each_valid_link(cr, link)
 834                 wdev->links[link].client.current_bss =
 835                         bss_from_pub(cr->links[link].bss);
 836         wdev->connected = true;
 837         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
 838         if (cr->valid_links) {
 839                 for_each_valid_link(cr, link)
 840                         memcpy(wdev->links[link].addr, cr->links[link].addr,
 841                                ETH_ALEN);
 842         }
 843
 844         if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
 845                 cfg80211_upload_connect_keys(wdev);
 846
 847         rcu_read_lock();
 848         for_each_valid_link(cr, link) {
 849                 country_elem =
 850                         ieee80211_bss_get_elem(cr->links[link].bss,
 851                                                WLAN_EID_COUNTRY);
 852                 if (country_elem)
 853                         break;
 854         }
 855         if (!country_elem) {
 856                 rcu_read_unlock();
 857                 return;
 858         }
 859
 860         country_datalen = country_elem->datalen;
 861         country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
 862         rcu_read_unlock();
 863
 864         if (!country_data)
 865                 return;
 866
 867         regulatory_hint_country_ie(wdev->wiphy,
 868                                    cr->links[link].bss->channel->band,
 869                                    country_data, country_datalen);
 870         kfree(country_data);
 871
 872         return;
 873 out:
 874         for_each_valid_link(cr, link)
 875                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 876 }
 877
 878 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
 879                                      struct cfg80211_bss **bss)
 880 {
 881         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 882         struct cfg80211_internal_bss *ibss;
 883
 884         if (!*bss)
 885                 return;
 886
 887         ibss = bss_from_pub(*bss);
 888         if (list_empty(&ibss->list)) {
 889                 struct cfg80211_bss *found = NULL, *tmp = *bss;
 890
 891                 found = cfg80211_get_bss(wdev->wiphy, NULL,
 892                                          (*bss)->bssid,
 893                                          wdev->u.client.ssid,
 894                                          wdev->u.client.ssid_len,
 895                                          wdev->conn_bss_type,
 896                                          IEEE80211_PRIVACY_ANY);
 897                 if (found) {
 898                         /* The same BSS is already updated so use it
 899                          * instead, as it has latest info.
 900                          */
 901                         *bss = found;
 902                 } else {
 903                         /* Update with BSS provided by driver, it will
 904                          * be freshly added and ref cnted, we can free
 905                          * the old one.
 906                          *
 907                          * signal_valid can be false, as we are not
 908                          * expecting the BSS to be found.
 909                          *
 910                          * keep the old timestamp to avoid confusion
 911                          */
 912                         cfg80211_bss_update(rdev, ibss, false,
 913                                             ibss->ts);
 914                 }
 915
 916                 cfg80211_put_bss(wdev->wiphy, tmp);
 917         }
 918 }
 919
 920 /* Consumes bss object(s) one way or another */
 921 void cfg80211_connect_done(struct net_device *dev,
 922                            struct cfg80211_connect_resp_params *params,
 923                            gfp_t gfp)
 924 {
 925         struct wireless_dev *wdev = dev->ieee80211_ptr;
 926         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 927         struct cfg80211_event *ev;
 928         unsigned long flags;
 929         u8 *next;
 930         size_t link_info_size = 0;
 931         unsigned int link;
 932
 933         for_each_valid_link(params, link) {
 934                 cfg80211_update_link_bss(wdev, &params->links[link].bss);
 935                 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
 936                 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
 937         }
 938
 939         ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
 940                      params->req_ie_len + params->resp_ie_len +
 941                      params->fils.kek_len + params->fils.pmk_len +
 942                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
 943                      gfp);
 944
 945         if (!ev) {
 946                 for_each_valid_link(params, link)
 947                         cfg80211_put_bss(wdev->wiphy,
 948                                          params->links[link].bss);
 949                 return;
 950         }
 951
 952         ev->type = EVENT_CONNECT_RESULT;
 953         next = ((u8 *)ev) + sizeof(*ev);
 954         if (params->ap_mld_addr) {
 955                 ev->cr.ap_mld_addr = next;
 956                 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
 957                        ETH_ALEN);
 958                 next += ETH_ALEN;
 959         }
 960         if (params->req_ie_len) {
 961                 ev->cr.req_ie = next;
 962                 ev->cr.req_ie_len = params->req_ie_len;
 963                 memcpy((void *)ev->cr.req_ie, params->req_ie,
 964                        params->req_ie_len);
 965                 next += params->req_ie_len;
 966         }
 967         if (params->resp_ie_len) {
 968                 ev->cr.resp_ie = next;
 969                 ev->cr.resp_ie_len = params->resp_ie_len;
 970                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
 971                        params->resp_ie_len);
 972                 next += params->resp_ie_len;
 973         }
 974         if (params->fils.kek_len) {
 975                 ev->cr.fils.kek = next;
 976                 ev->cr.fils.kek_len = params->fils.kek_len;
 977                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
 978                        params->fils.kek_len);
 979                 next += params->fils.kek_len;
 980         }
 981         if (params->fils.pmk_len) {
 982                 ev->cr.fils.pmk = next;
 983                 ev->cr.fils.pmk_len = params->fils.pmk_len;
 984                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
 985                        params->fils.pmk_len);
 986                 next += params->fils.pmk_len;
 987         }
 988         if (params->fils.pmkid) {
 989                 ev->cr.fils.pmkid = next;
 990                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
 991                        WLAN_PMKID_LEN);
 992                 next += WLAN_PMKID_LEN;
 993         }
 994         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
 995         if (params->fils.update_erp_next_seq_num)
 996                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
 997         ev->cr.valid_links = params->valid_links;
 998         for_each_valid_link(params, link) {
 999                 if (params->links[link].bss)
1000                         cfg80211_hold_bss(
1001                                 bss_from_pub(params->links[link].bss));
1002                 ev->cr.links[link].bss = params->links[link].bss;
1003
1004                 if (params->links[link].addr) {
1005                         ev->cr.links[link].addr = next;
1006                         memcpy((void *)ev->cr.links[link].addr,
1007                                params->links[link].addr,
1008                                ETH_ALEN);
1009                         next += ETH_ALEN;
1010                 }
1011                 if (params->links[link].bssid) {
1012                         ev->cr.links[link].bssid = next;
1013                         memcpy((void *)ev->cr.links[link].bssid,
1014                                params->links[link].bssid,
1015                                ETH_ALEN);
1016                         next += ETH_ALEN;
1017                 }
1018         }
1019         ev->cr.status = params->status;
1020         ev->cr.timeout_reason = params->timeout_reason;
1021
1022         spin_lock_irqsave(&wdev->event_lock, flags);
1023         list_add_tail(&ev->list, &wdev->event_list);
1024         spin_unlock_irqrestore(&wdev->event_lock, flags);
1025         queue_work(cfg80211_wq, &rdev->event_work);
1026 }
1027 EXPORT_SYMBOL(cfg80211_connect_done);
1028
1029 /* Consumes bss object one way or another */
1030 void __cfg80211_roamed(struct wireless_dev *wdev,
1031                        struct cfg80211_roam_info *info)
1032 {
1033 #ifdef CONFIG_CFG80211_WEXT
1034         union iwreq_data wrqu;
1035 #endif
1036         unsigned int link;
1037         const u8 *connected_addr;
1038
1039         ASSERT_WDEV_LOCK(wdev);
1040
1041         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1042                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1043                 goto out;
1044
1045         if (WARN_ON(!wdev->connected))
1046                 goto out;
1047
1048         if (info->valid_links) {
1049                 if (WARN_ON(!info->ap_mld_addr))
1050                         goto out;
1051
1052                 for_each_valid_link(info, link) {
1053                         if (WARN_ON(!info->links[link].addr))
1054                                 goto out;
1055                 }
1056         }
1057
1058         cfg80211_wdev_release_bsses(wdev);
1059
1060         for_each_valid_link(info, link) {
1061                 if (WARN_ON(!info->links[link].bss))
1062                         goto out;
1063         }
1064
1065         memset(wdev->links, 0, sizeof(wdev->links));
1066         wdev->valid_links = info->valid_links;
1067         for_each_valid_link(info, link) {
1068                 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1069                 wdev->links[link].client.current_bss =
1070                         bss_from_pub(info->links[link].bss);
1071         }
1072
1073         connected_addr = info->valid_links ?
1074                          info->ap_mld_addr :
1075                          info->links[0].bss->bssid;
1076         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1077         if (info->valid_links) {
1078                 for_each_valid_link(info, link)
1079                         memcpy(wdev->links[link].addr, info->links[link].addr,
1080                                ETH_ALEN);
1081         }
1082         wdev->unprot_beacon_reported = 0;
1083         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1084                             wdev->netdev, info, GFP_KERNEL);
1085
1086 #ifdef CONFIG_CFG80211_WEXT
1087         if (!info->valid_links) {
1088                 if (info->req_ie) {
1089                         memset(&wrqu, 0, sizeof(wrqu));
1090                         wrqu.data.length = info->req_ie_len;
1091                         wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1092                                             &wrqu, info->req_ie);
1093                 }
1094
1095                 if (info->resp_ie) {
1096                         memset(&wrqu, 0, sizeof(wrqu));
1097                         wrqu.data.length = info->resp_ie_len;
1098                         wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1099                                             &wrqu, info->resp_ie);
1100                 }
1101
1102                 memset(&wrqu, 0, sizeof(wrqu));
1103                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1104                 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1105                 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1106                 wdev->wext.prev_bssid_valid = true;
1107                 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1108         }
1109 #endif
1110
1111         return;
1112 out:
1113         for_each_valid_link(info, link)
1114                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1115 }
1116
1117 /* Consumes info->links.bss object(s) one way or another */
1118 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1119                      gfp_t gfp)
1120 {
1121         struct wireless_dev *wdev = dev->ieee80211_ptr;
1122         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1123         struct cfg80211_event *ev;
1124         unsigned long flags;
1125         u8 *next;
1126         unsigned int link;
1127         size_t link_info_size = 0;
1128         bool bss_not_found = false;
1129
1130         for_each_valid_link(info, link) {
1131                 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1132                 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1133
1134                 if (info->links[link].bss)
1135                         continue;
1136
1137                 info->links[link].bss =
1138                         cfg80211_get_bss(wdev->wiphy,
1139                                          info->links[link].channel,
1140                                          info->links[link].bssid,
1141                                          wdev->u.client.ssid,
1142                                          wdev->u.client.ssid_len,
1143                                          wdev->conn_bss_type,
1144                                          IEEE80211_PRIVACY_ANY);
1145
1146                 if (!info->links[link].bss) {
1147                         bss_not_found = true;
1148                         break;
1149                 }
1150         }
1151
1152         if (WARN_ON(bss_not_found))
1153                 goto out;
1154
1155         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1156                      info->fils.kek_len + info->fils.pmk_len +
1157                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1158                      (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1159         if (!ev)
1160                 goto out;
1161
1162         ev->type = EVENT_ROAMED;
1163         next = ((u8 *)ev) + sizeof(*ev);
1164         if (info->req_ie_len) {
1165                 ev->rm.req_ie = next;
1166                 ev->rm.req_ie_len = info->req_ie_len;
1167                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1168                 next += info->req_ie_len;
1169         }
1170         if (info->resp_ie_len) {
1171                 ev->rm.resp_ie = next;
1172                 ev->rm.resp_ie_len = info->resp_ie_len;
1173                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1174                        info->resp_ie_len);
1175                 next += info->resp_ie_len;
1176         }
1177         if (info->fils.kek_len) {
1178                 ev->rm.fils.kek = next;
1179                 ev->rm.fils.kek_len = info->fils.kek_len;
1180                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1181                        info->fils.kek_len);
1182                 next += info->fils.kek_len;
1183         }
1184         if (info->fils.pmk_len) {
1185                 ev->rm.fils.pmk = next;
1186                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1187                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1188                        info->fils.pmk_len);
1189                 next += info->fils.pmk_len;
1190         }
1191         if (info->fils.pmkid) {
1192                 ev->rm.fils.pmkid = next;
1193                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1194                        WLAN_PMKID_LEN);
1195                 next += WLAN_PMKID_LEN;
1196         }
1197         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1198         if (info->fils.update_erp_next_seq_num)
1199                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1200         if (info->ap_mld_addr) {
1201                 ev->rm.ap_mld_addr = next;
1202                 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1203                        ETH_ALEN);
1204                 next += ETH_ALEN;
1205         }
1206         ev->rm.valid_links = info->valid_links;
1207         for_each_valid_link(info, link) {
1208                 ev->rm.links[link].bss = info->links[link].bss;
1209
1210                 if (info->links[link].addr) {
1211                         ev->rm.links[link].addr = next;
1212                         memcpy((void *)ev->rm.links[link].addr,
1213                                info->links[link].addr,
1214                                ETH_ALEN);
1215                         next += ETH_ALEN;
1216                 }
1217
1218                 if (info->links[link].bssid) {
1219                         ev->rm.links[link].bssid = next;
1220                         memcpy((void *)ev->rm.links[link].bssid,
1221                                info->links[link].bssid,
1222                                ETH_ALEN);
1223                         next += ETH_ALEN;
1224                 }
1225         }
1226
1227         spin_lock_irqsave(&wdev->event_lock, flags);
1228         list_add_tail(&ev->list, &wdev->event_list);
1229         spin_unlock_irqrestore(&wdev->event_lock, flags);
1230         queue_work(cfg80211_wq, &rdev->event_work);
1231
1232         return;
1233 out:
1234         for_each_valid_link(info, link)
1235                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1236
1237 }
1238 EXPORT_SYMBOL(cfg80211_roamed);
1239
1240 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid)
1241 {
1242         ASSERT_WDEV_LOCK(wdev);
1243
1244         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1245                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1246                 return;
1247
1248         if (WARN_ON(!wdev->connected) ||
1249             WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid)))
1250                 return;
1251
1252         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1253                                      bssid);
1254 }
1255
1256 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1257                               gfp_t gfp)
1258 {
1259         struct wireless_dev *wdev = dev->ieee80211_ptr;
1260         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1261         struct cfg80211_event *ev;
1262         unsigned long flags;
1263
1264         if (WARN_ON(!bssid))
1265                 return;
1266
1267         ev = kzalloc(sizeof(*ev), gfp);
1268         if (!ev)
1269                 return;
1270
1271         ev->type = EVENT_PORT_AUTHORIZED;
1272         memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1273
1274         /*
1275          * Use the wdev event list so that if there are pending
1276          * connected/roamed events, they will be reported first.
1277          */
1278         spin_lock_irqsave(&wdev->event_lock, flags);
1279         list_add_tail(&ev->list, &wdev->event_list);
1280         spin_unlock_irqrestore(&wdev->event_lock, flags);
1281         queue_work(cfg80211_wq, &rdev->event_work);
1282 }
1283 EXPORT_SYMBOL(cfg80211_port_authorized);
1284
1285 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1286                              size_t ie_len, u16 reason, bool from_ap)
1287 {
1288         struct wireless_dev *wdev = dev->ieee80211_ptr;
1289         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1290         int i;
1291 #ifdef CONFIG_CFG80211_WEXT
1292         union iwreq_data wrqu;
1293 #endif
1294
1295         ASSERT_WDEV_LOCK(wdev);
1296
1297         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1298                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1299                 return;
1300
1301         cfg80211_wdev_release_bsses(wdev);
1302         wdev->connected = false;
1303         wdev->u.client.ssid_len = 0;
1304         wdev->conn_owner_nlportid = 0;
1305         kfree_sensitive(wdev->connect_keys);
1306         wdev->connect_keys = NULL;
1307
1308         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1309
1310         /* stop critical protocol if supported */
1311         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1312                 rdev->crit_proto_nlportid = 0;
1313                 rdev_crit_proto_stop(rdev, wdev);
1314         }
1315
1316         /*
1317          * Delete all the keys ... pairwise keys can't really
1318          * exist any more anyway, but default keys might.
1319          */
1320         if (rdev->ops->del_key) {
1321                 int max_key_idx = 5;
1322
1323                 if (wiphy_ext_feature_isset(
1324                             wdev->wiphy,
1325                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1326                     wiphy_ext_feature_isset(
1327                             wdev->wiphy,
1328                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1329                         max_key_idx = 7;
1330                 for (i = 0; i <= max_key_idx; i++)
1331                         rdev_del_key(rdev, dev, -1, i, false, NULL);
1332         }
1333
1334         rdev_set_qos_map(rdev, dev, NULL);
1335
1336 #ifdef CONFIG_CFG80211_WEXT
1337         memset(&wrqu, 0, sizeof(wrqu));
1338         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1339         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1340         wdev->wext.connect.ssid_len = 0;
1341 #endif
1342
1343         schedule_work(&cfg80211_disconnect_work);
1344 }
1345
1346 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1347                            const u8 *ie, size_t ie_len,
1348                            bool locally_generated, gfp_t gfp)
1349 {
1350         struct wireless_dev *wdev = dev->ieee80211_ptr;
1351         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1352         struct cfg80211_event *ev;
1353         unsigned long flags;
1354
1355         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1356         if (!ev)
1357                 return;
1358
1359         ev->type = EVENT_DISCONNECTED;
1360         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1361         ev->dc.ie_len = ie_len;
1362         memcpy((void *)ev->dc.ie, ie, ie_len);
1363         ev->dc.reason = reason;
1364         ev->dc.locally_generated = locally_generated;
1365
1366         spin_lock_irqsave(&wdev->event_lock, flags);
1367         list_add_tail(&ev->list, &wdev->event_list);
1368         spin_unlock_irqrestore(&wdev->event_lock, flags);
1369         queue_work(cfg80211_wq, &rdev->event_work);
1370 }
1371 EXPORT_SYMBOL(cfg80211_disconnected);
1372
1373 /*
1374  * API calls for nl80211/wext compatibility code
1375  */
1376 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1377                      struct net_device *dev,
1378                      struct cfg80211_connect_params *connect,
1379                      struct cfg80211_cached_keys *connkeys,
1380                      const u8 *prev_bssid)
1381 {
1382         struct wireless_dev *wdev = dev->ieee80211_ptr;
1383         int err;
1384
1385         ASSERT_WDEV_LOCK(wdev);
1386
1387         /*
1388          * If we have an ssid_len, we're trying to connect or are
1389          * already connected, so reject a new SSID unless it's the
1390          * same (which is the case for re-association.)
1391          */
1392         if (wdev->u.client.ssid_len &&
1393             (wdev->u.client.ssid_len != connect->ssid_len ||
1394              memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1395                 return -EALREADY;
1396
1397         /*
1398          * If connected, reject (re-)association unless prev_bssid
1399          * matches the current BSSID.
1400          */
1401         if (wdev->connected) {
1402                 if (!prev_bssid)
1403                         return -EALREADY;
1404                 if (!ether_addr_equal(prev_bssid,
1405                                       wdev->u.client.connected_addr))
1406                         return -ENOTCONN;
1407         }
1408
1409         /*
1410          * Reject if we're in the process of connecting with WEP,
1411          * this case isn't very interesting and trying to handle
1412          * it would make the code much more complex.
1413          */
1414         if (wdev->connect_keys)
1415                 return -EINPROGRESS;
1416
1417         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1418                                   rdev->wiphy.ht_capa_mod_mask);
1419         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1420                                    rdev->wiphy.vht_capa_mod_mask);
1421
1422         if (connkeys && connkeys->def >= 0) {
1423                 int idx;
1424                 u32 cipher;
1425
1426                 idx = connkeys->def;
1427                 cipher = connkeys->params[idx].cipher;
1428                 /* If given a WEP key we may need it for shared key auth */
1429                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1430                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1431                         connect->key_idx = idx;
1432                         connect->key = connkeys->params[idx].key;
1433                         connect->key_len = connkeys->params[idx].key_len;
1434
1435                         /*
1436                          * If ciphers are not set (e.g. when going through
1437                          * iwconfig), we have to set them appropriately here.
1438                          */
1439                         if (connect->crypto.cipher_group == 0)
1440                                 connect->crypto.cipher_group = cipher;
1441
1442                         if (connect->crypto.n_ciphers_pairwise == 0) {
1443                                 connect->crypto.n_ciphers_pairwise = 1;
1444                                 connect->crypto.ciphers_pairwise[0] = cipher;
1445                         }
1446                 }
1447
1448                 connect->crypto.wep_keys = connkeys->params;
1449                 connect->crypto.wep_tx_key = connkeys->def;
1450         } else {
1451                 if (WARN_ON(connkeys))
1452                         return -EINVAL;
1453         }
1454
1455         wdev->connect_keys = connkeys;
1456         memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1457         wdev->u.client.ssid_len = connect->ssid_len;
1458
1459         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1460                                               IEEE80211_BSS_TYPE_ESS;
1461
1462         if (!rdev->ops->connect)
1463                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1464         else
1465                 err = rdev_connect(rdev, dev, connect);
1466
1467         if (err) {
1468                 wdev->connect_keys = NULL;
1469                 /*
1470                  * This could be reassoc getting refused, don't clear
1471                  * ssid_len in that case.
1472                  */
1473                 if (!wdev->connected)
1474                         wdev->u.client.ssid_len = 0;
1475                 return err;
1476         }
1477
1478         return 0;
1479 }
1480
1481 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1482                         struct net_device *dev, u16 reason, bool wextev)
1483 {
1484         struct wireless_dev *wdev = dev->ieee80211_ptr;
1485         int err = 0;
1486
1487         ASSERT_WDEV_LOCK(wdev);
1488
1489         kfree_sensitive(wdev->connect_keys);
1490         wdev->connect_keys = NULL;
1491
1492         wdev->conn_owner_nlportid = 0;
1493
1494         if (wdev->conn)
1495                 err = cfg80211_sme_disconnect(wdev, reason);
1496         else if (!rdev->ops->disconnect)
1497                 cfg80211_mlme_down(rdev, dev);
1498         else if (wdev->u.client.ssid_len)
1499                 err = rdev_disconnect(rdev, dev, reason);
1500
1501         /*
1502          * Clear ssid_len unless we actually were fully connected,
1503          * in which case cfg80211_disconnected() will take care of
1504          * this later.
1505          */
1506         if (!wdev->connected)
1507                 wdev->u.client.ssid_len = 0;
1508
1509         return err;
1510 }
1511
1512 /*
1513  * Used to clean up after the connection / connection attempt owner socket
1514  * disconnects
1515  */
1516 void cfg80211_autodisconnect_wk(struct work_struct *work)
1517 {
1518         struct wireless_dev *wdev =
1519                 container_of(work, struct wireless_dev, disconnect_wk);
1520         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1521
1522         wdev_lock(wdev);
1523
1524         if (wdev->conn_owner_nlportid) {
1525                 switch (wdev->iftype) {
1526                 case NL80211_IFTYPE_ADHOC:
1527                         __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1528                         break;
1529                 case NL80211_IFTYPE_AP:
1530                 case NL80211_IFTYPE_P2P_GO:
1531                         __cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1532                         break;
1533                 case NL80211_IFTYPE_MESH_POINT:
1534                         __cfg80211_leave_mesh(rdev, wdev->netdev);
1535                         break;
1536                 case NL80211_IFTYPE_STATION:
1537                 case NL80211_IFTYPE_P2P_CLIENT:
1538                         /*
1539                          * Use disconnect_bssid if still connecting and
1540                          * ops->disconnect not implemented.  Otherwise we can
1541                          * use cfg80211_disconnect.
1542                          */
1543                         if (rdev->ops->disconnect || wdev->connected)
1544                                 cfg80211_disconnect(rdev, wdev->netdev,
1545                                                     WLAN_REASON_DEAUTH_LEAVING,
1546                                                     true);
1547                         else
1548                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1549                                                      wdev->disconnect_bssid,
1550                                                      NULL, 0,
1551                                                      WLAN_REASON_DEAUTH_LEAVING,
1552                                                      false);
1553                         break;
1554                 default:
1555                         break;
1556                 }
1557         }
1558
1559         wdev_unlock(wdev);
1560 }