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, 2022-2023 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 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
 289                                     struct cfg80211_bss *bss)
 290 {
 291         memcpy(conn->bssid, bss->bssid, ETH_ALEN);
 292         conn->params.bssid = conn->bssid;
 293         conn->params.channel = bss->channel;
 294         conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 295 }
 296
 297 /* Returned bss is reference counted and must be cleaned up appropriately. */
 298 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 299 {
 300         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 301         struct cfg80211_bss *bss;
 302
 303         ASSERT_WDEV_LOCK(wdev);
 304
 305         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 306                                wdev->conn->params.bssid,
 307                                wdev->conn->params.ssid,
 308                                wdev->conn->params.ssid_len,
 309                                wdev->conn_bss_type,
 310                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 311         if (!bss)
 312                 return NULL;
 313
 314         cfg80211_step_auth_next(wdev->conn, bss);
 315         schedule_work(&rdev->conn_work);
 316
 317         return bss;
 318 }
 319
 320 static void __cfg80211_sme_scan_done(struct net_device *dev)
 321 {
 322         struct wireless_dev *wdev = dev->ieee80211_ptr;
 323         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 324         struct cfg80211_bss *bss;
 325
 326         ASSERT_WDEV_LOCK(wdev);
 327
 328         if (!wdev->conn)
 329                 return;
 330
 331         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 332             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 333                 return;
 334
 335         bss = cfg80211_get_conn_bss(wdev);
 336         if (bss)
 337                 cfg80211_put_bss(&rdev->wiphy, bss);
 338         else
 339                 schedule_work(&rdev->conn_work);
 340 }
 341
 342 void cfg80211_sme_scan_done(struct net_device *dev)
 343 {
 344         struct wireless_dev *wdev = dev->ieee80211_ptr;
 345
 346         wdev_lock(wdev);
 347         __cfg80211_sme_scan_done(dev);
 348         wdev_unlock(wdev);
 349 }
 350
 351 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 352 {
 353         struct wiphy *wiphy = wdev->wiphy;
 354         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 355         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 356         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 357
 358         ASSERT_WDEV_LOCK(wdev);
 359
 360         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 361                 return;
 362
 363         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 364             wdev->conn->auto_auth &&
 365             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 366                 /* select automatically between only open, shared, leap */
 367                 switch (wdev->conn->params.auth_type) {
 368                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 369                         if (wdev->connect_keys)
 370                                 wdev->conn->params.auth_type =
 371                                         NL80211_AUTHTYPE_SHARED_KEY;
 372                         else
 373                                 wdev->conn->params.auth_type =
 374                                         NL80211_AUTHTYPE_NETWORK_EAP;
 375                         break;
 376                 case NL80211_AUTHTYPE_SHARED_KEY:
 377                         wdev->conn->params.auth_type =
 378                                 NL80211_AUTHTYPE_NETWORK_EAP;
 379                         break;
 380                 default:
 381                         /* huh? */
 382                         wdev->conn->params.auth_type =
 383                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 384                         break;
 385                 }
 386                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 387                 schedule_work(&rdev->conn_work);
 388         } else if (status_code != WLAN_STATUS_SUCCESS) {
 389                 struct cfg80211_connect_resp_params cr;
 390
 391                 memset(&cr, 0, sizeof(cr));
 392                 cr.status = status_code;
 393                 cr.links[0].bssid = mgmt->bssid;
 394                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 395                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 396         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 397                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 398                 schedule_work(&rdev->conn_work);
 399         }
 400 }
 401
 402 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 403 {
 404         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 405
 406         if (!wdev->conn)
 407                 return false;
 408
 409         if (status == WLAN_STATUS_SUCCESS) {
 410                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 411                 return false;
 412         }
 413
 414         if (wdev->conn->prev_bssid_valid) {
 415                 /*
 416                  * Some stupid APs don't accept reassoc, so we
 417                  * need to fall back to trying regular assoc;
 418                  * return true so no event is sent to userspace.
 419                  */
 420                 wdev->conn->prev_bssid_valid = false;
 421                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 422                 schedule_work(&rdev->conn_work);
 423                 return true;
 424         }
 425
 426         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 427         schedule_work(&rdev->conn_work);
 428         return false;
 429 }
 430
 431 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 432 {
 433         cfg80211_sme_free(wdev);
 434 }
 435
 436 void cfg80211_sme_auth_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_AUTH_FAILED_TIMEOUT;
 444         schedule_work(&rdev->conn_work);
 445 }
 446
 447 void cfg80211_sme_disassoc(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_DEAUTH;
 455         schedule_work(&rdev->conn_work);
 456 }
 457
 458 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 459 {
 460         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 461
 462         if (!wdev->conn)
 463                 return;
 464
 465         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 466         schedule_work(&rdev->conn_work);
 467 }
 468
 469 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 470 {
 471         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 472
 473         if (!wdev->conn)
 474                 return;
 475
 476         wdev->conn->state = CFG80211_CONN_ABANDON;
 477         schedule_work(&rdev->conn_work);
 478 }
 479
 480 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
 481 {
 482         unsigned int link;
 483
 484         for_each_valid_link(wdev, link) {
 485                 if (!wdev->links[link].client.current_bss)
 486                         continue;
 487                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 488                 cfg80211_put_bss(wdev->wiphy,
 489                                  &wdev->links[link].client.current_bss->pub);
 490                 wdev->links[link].client.current_bss = NULL;
 491         }
 492 }
 493
 494 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
 495 {
 496         unsigned int link;
 497
 498         for_each_valid_link(wdev, link) {
 499                 if (!wdev->links[link].client.current_bss ||
 500                     !(link_mask & BIT(link)))
 501                         continue;
 502                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 503                 cfg80211_put_bss(wdev->wiphy,
 504                                  &wdev->links[link].client.current_bss->pub);
 505                 wdev->links[link].client.current_bss = NULL;
 506         }
 507 }
 508
 509 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 510                                      const u8 *ies, size_t ies_len,
 511                                      const u8 **out_ies, size_t *out_ies_len)
 512 {
 513         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 514         u8 *buf;
 515         size_t offs;
 516
 517         if (!rdev->wiphy.extended_capabilities_len ||
 518             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 519                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 520                 if (!*out_ies)
 521                         return -ENOMEM;
 522                 *out_ies_len = ies_len;
 523                 return 0;
 524         }
 525
 526         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 527                       GFP_KERNEL);
 528         if (!buf)
 529                 return -ENOMEM;
 530
 531         if (ies_len) {
 532                 static const u8 before_extcapa[] = {
 533                         /* not listing IEs expected to be created by driver */
 534                         WLAN_EID_RSN,
 535                         WLAN_EID_QOS_CAPA,
 536                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 537                         WLAN_EID_MOBILITY_DOMAIN,
 538                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 539                         WLAN_EID_BSS_COEX_2040,
 540                 };
 541
 542                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 543                                           ARRAY_SIZE(before_extcapa), 0);
 544                 memcpy(buf, ies, offs);
 545                 /* leave a whole for extended capabilities IE */
 546                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 547                        ies + offs, ies_len - offs);
 548         } else {
 549                 offs = 0;
 550         }
 551
 552         /* place extended capabilities IE (with only driver capabilities) */
 553         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 554         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 555         memcpy(buf + offs + 2,
 556                rdev->wiphy.extended_capabilities,
 557                rdev->wiphy.extended_capabilities_len);
 558
 559         *out_ies = buf;
 560         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 561
 562         return 0;
 563 }
 564
 565 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 566                                 struct cfg80211_connect_params *connect,
 567                                 const u8 *prev_bssid)
 568 {
 569         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 570         struct cfg80211_bss *bss;
 571         int err;
 572
 573         if (!rdev->ops->auth || !rdev->ops->assoc)
 574                 return -EOPNOTSUPP;
 575
 576         cfg80211_wdev_release_bsses(wdev);
 577
 578         if (wdev->connected) {
 579                 cfg80211_sme_free(wdev);
 580                 wdev->connected = false;
 581         }
 582
 583         if (wdev->conn)
 584                 return -EINPROGRESS;
 585
 586         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 587         if (!wdev->conn)
 588                 return -ENOMEM;
 589
 590         /*
 591          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 592          */
 593         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 594         if (connect->bssid) {
 595                 wdev->conn->params.bssid = wdev->conn->bssid;
 596                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 597         }
 598
 599         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 600                                       &wdev->conn->ie,
 601                                       &wdev->conn->params.ie_len)) {
 602                 kfree(wdev->conn);
 603                 wdev->conn = NULL;
 604                 return -ENOMEM;
 605         }
 606         wdev->conn->params.ie = wdev->conn->ie;
 607
 608         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 609                 wdev->conn->auto_auth = true;
 610                 /* start with open system ... should mostly work */
 611                 wdev->conn->params.auth_type =
 612                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 613         } else {
 614                 wdev->conn->auto_auth = false;
 615         }
 616
 617         wdev->conn->params.ssid = wdev->u.client.ssid;
 618         wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
 619
 620         /* see if we have the bss already */
 621         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 622                                wdev->conn->params.bssid,
 623                                wdev->conn->params.ssid,
 624                                wdev->conn->params.ssid_len,
 625                                wdev->conn_bss_type,
 626                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 627
 628         if (prev_bssid) {
 629                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 630                 wdev->conn->prev_bssid_valid = true;
 631         }
 632
 633         /* we're good if we have a matching bss struct */
 634         if (bss) {
 635                 enum nl80211_timeout_reason treason;
 636
 637                 cfg80211_step_auth_next(wdev->conn, bss);
 638                 err = cfg80211_conn_do_work(wdev, &treason);
 639                 cfg80211_put_bss(wdev->wiphy, bss);
 640         } else {
 641                 /* otherwise we'll need to scan for the AP first */
 642                 err = cfg80211_conn_scan(wdev);
 643
 644                 /*
 645                  * If we can't scan right now, then we need to scan again
 646                  * after the current scan finished, since the parameters
 647                  * changed (unless we find a good AP anyway).
 648                  */
 649                 if (err == -EBUSY) {
 650                         err = 0;
 651                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 652                 }
 653         }
 654
 655         if (err)
 656                 cfg80211_sme_free(wdev);
 657
 658         return err;
 659 }
 660
 661 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 662 {
 663         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 664         int err;
 665
 666         if (!wdev->conn)
 667                 return 0;
 668
 669         if (!rdev->ops->deauth)
 670                 return -EOPNOTSUPP;
 671
 672         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 673             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 674                 err = 0;
 675                 goto out;
 676         }
 677
 678         /* wdev->conn->params.bssid must be set if > SCANNING */
 679         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 680                                    wdev->conn->params.bssid,
 681                                    NULL, 0, reason, false);
 682  out:
 683         cfg80211_sme_free(wdev);
 684         return err;
 685 }
 686
 687 /*
 688  * code shared for in-device and software SME
 689  */
 690
 691 static bool cfg80211_is_all_idle(void)
 692 {
 693         struct cfg80211_registered_device *rdev;
 694         struct wireless_dev *wdev;
 695         bool is_all_idle = true;
 696
 697         /*
 698          * All devices must be idle as otherwise if you are actively
 699          * scanning some new beacon hints could be learned and would
 700          * count as new regulatory hints.
 701          * Also if there is any other active beaconing interface we
 702          * need not issue a disconnect hint and reset any info such
 703          * as chan dfs state, etc.
 704          */
 705         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 706                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 707                         wdev_lock(wdev);
 708                         if (wdev->conn || wdev->connected ||
 709                             cfg80211_beaconing_iface_active(wdev))
 710                                 is_all_idle = false;
 711                         wdev_unlock(wdev);
 712                 }
 713         }
 714
 715         return is_all_idle;
 716 }
 717
 718 static void disconnect_work(struct work_struct *work)
 719 {
 720         rtnl_lock();
 721         if (cfg80211_is_all_idle())
 722                 regulatory_hint_disconnect();
 723         rtnl_unlock();
 724 }
 725
 726 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 727
 728 static void
 729 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
 730                                       struct cfg80211_connect_resp_params *cr)
 731 {
 732         unsigned int link;
 733
 734         for_each_valid_link(cr, link) {
 735                 if (!cr->links[link].bss)
 736                         continue;
 737                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 738                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 739         }
 740 }
 741
 742 /*
 743  * API calls for drivers implementing connect/disconnect and
 744  * SME event handling
 745  */
 746
 747 /* This method must consume bss one way or another */
 748 void __cfg80211_connect_result(struct net_device *dev,
 749                                struct cfg80211_connect_resp_params *cr,
 750                                bool wextev)
 751 {
 752         struct wireless_dev *wdev = dev->ieee80211_ptr;
 753         const struct element *country_elem = NULL;
 754         const struct element *ssid;
 755         const u8 *country_data;
 756         u8 country_datalen;
 757 #ifdef CONFIG_CFG80211_WEXT
 758         union iwreq_data wrqu;
 759 #endif
 760         unsigned int link;
 761         const u8 *connected_addr;
 762         bool bss_not_found = false;
 763
 764         ASSERT_WDEV_LOCK(wdev);
 765
 766         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 767                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 768                 goto out;
 769
 770         if (cr->valid_links) {
 771                 if (WARN_ON(!cr->ap_mld_addr))
 772                         goto out;
 773
 774                 for_each_valid_link(cr, link) {
 775                         if (WARN_ON(!cr->links[link].addr))
 776                                 goto out;
 777                 }
 778
 779                 if (WARN_ON(wdev->connect_keys))
 780                         goto out;
 781         }
 782
 783         wdev->unprot_beacon_reported = 0;
 784         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 785                                     GFP_KERNEL);
 786         connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
 787
 788 #ifdef CONFIG_CFG80211_WEXT
 789         if (wextev && !cr->valid_links) {
 790                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 791                         memset(&wrqu, 0, sizeof(wrqu));
 792                         wrqu.data.length = cr->req_ie_len;
 793                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 794                                             cr->req_ie);
 795                 }
 796
 797                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 798                         memset(&wrqu, 0, sizeof(wrqu));
 799                         wrqu.data.length = cr->resp_ie_len;
 800                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 801                                             cr->resp_ie);
 802                 }
 803
 804                 memset(&wrqu, 0, sizeof(wrqu));
 805                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 806                 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
 807                         memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
 808                         memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
 809                         wdev->wext.prev_bssid_valid = true;
 810                 }
 811                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 812         }
 813 #endif
 814
 815         if (cr->status == WLAN_STATUS_SUCCESS) {
 816                 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
 817                         for_each_valid_link(cr, link) {
 818                                 if (WARN_ON_ONCE(!cr->links[link].bss))
 819                                         break;
 820                         }
 821                 }
 822
 823                 for_each_valid_link(cr, link) {
 824                         /* don't do extra lookups for failures */
 825                         if (cr->links[link].status != WLAN_STATUS_SUCCESS)
 826                                 continue;
 827
 828                         if (cr->links[link].bss)
 829                                 continue;
 830
 831                         cr->links[link].bss =
 832                                 cfg80211_get_bss(wdev->wiphy, NULL,
 833                                                  cr->links[link].bssid,
 834                                                  wdev->u.client.ssid,
 835                                                  wdev->u.client.ssid_len,
 836                                                  wdev->conn_bss_type,
 837                                                  IEEE80211_PRIVACY_ANY);
 838                         if (!cr->links[link].bss) {
 839                                 bss_not_found = true;
 840                                 break;
 841                         }
 842                         cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
 843                 }
 844         }
 845
 846         cfg80211_wdev_release_bsses(wdev);
 847
 848         if (cr->status != WLAN_STATUS_SUCCESS) {
 849                 kfree_sensitive(wdev->connect_keys);
 850                 wdev->connect_keys = NULL;
 851                 wdev->u.client.ssid_len = 0;
 852                 wdev->conn_owner_nlportid = 0;
 853                 cfg80211_connect_result_release_bsses(wdev, cr);
 854                 cfg80211_sme_free(wdev);
 855                 return;
 856         }
 857
 858         if (WARN_ON(bss_not_found)) {
 859                 cfg80211_connect_result_release_bsses(wdev, cr);
 860                 return;
 861         }
 862
 863         memset(wdev->links, 0, sizeof(wdev->links));
 864         for_each_valid_link(cr, link) {
 865                 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
 866                         continue;
 867                 cr->valid_links &= ~BIT(link);
 868                 /* don't require bss pointer for failed links */
 869                 if (!cr->links[link].bss)
 870                         continue;
 871                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 872                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 873         }
 874         wdev->valid_links = cr->valid_links;
 875         for_each_valid_link(cr, link)
 876                 wdev->links[link].client.current_bss =
 877                         bss_from_pub(cr->links[link].bss);
 878         wdev->connected = true;
 879         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
 880         if (cr->valid_links) {
 881                 for_each_valid_link(cr, link)
 882                         memcpy(wdev->links[link].addr, cr->links[link].addr,
 883                                ETH_ALEN);
 884         }
 885
 886         cfg80211_upload_connect_keys(wdev);
 887
 888         rcu_read_lock();
 889         for_each_valid_link(cr, link) {
 890                 country_elem =
 891                         ieee80211_bss_get_elem(cr->links[link].bss,
 892                                                WLAN_EID_COUNTRY);
 893                 if (country_elem)
 894                         break;
 895         }
 896         if (!country_elem) {
 897                 rcu_read_unlock();
 898                 return;
 899         }
 900
 901         country_datalen = country_elem->datalen;
 902         country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
 903         rcu_read_unlock();
 904
 905         if (!country_data)
 906                 return;
 907
 908         regulatory_hint_country_ie(wdev->wiphy,
 909                                    cr->links[link].bss->channel->band,
 910                                    country_data, country_datalen);
 911         kfree(country_data);
 912
 913         if (!wdev->u.client.ssid_len) {
 914                 rcu_read_lock();
 915                 for_each_valid_link(cr, link) {
 916                         ssid = ieee80211_bss_get_elem(cr->links[link].bss,
 917                                                       WLAN_EID_SSID);
 918
 919                         if (!ssid || !ssid->datalen)
 920                                 continue;
 921
 922                         memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
 923                         wdev->u.client.ssid_len = ssid->datalen;
 924                         break;
 925                 }
 926                 rcu_read_unlock();
 927         }
 928
 929         return;
 930 out:
 931         for_each_valid_link(cr, link)
 932                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 933 }
 934
 935 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
 936                                      struct cfg80211_bss **bss)
 937 {
 938         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 939         struct cfg80211_internal_bss *ibss;
 940
 941         if (!*bss)
 942                 return;
 943
 944         ibss = bss_from_pub(*bss);
 945         if (list_empty(&ibss->list)) {
 946                 struct cfg80211_bss *found = NULL, *tmp = *bss;
 947
 948                 found = cfg80211_get_bss(wdev->wiphy, NULL,
 949                                          (*bss)->bssid,
 950                                          wdev->u.client.ssid,
 951                                          wdev->u.client.ssid_len,
 952                                          wdev->conn_bss_type,
 953                                          IEEE80211_PRIVACY_ANY);
 954                 if (found) {
 955                         /* The same BSS is already updated so use it
 956                          * instead, as it has latest info.
 957                          */
 958                         *bss = found;
 959                 } else {
 960                         /* Update with BSS provided by driver, it will
 961                          * be freshly added and ref cnted, we can free
 962                          * the old one.
 963                          *
 964                          * signal_valid can be false, as we are not
 965                          * expecting the BSS to be found.
 966                          *
 967                          * keep the old timestamp to avoid confusion
 968                          */
 969                         cfg80211_bss_update(rdev, ibss, false,
 970                                             ibss->ts);
 971                 }
 972
 973                 cfg80211_put_bss(wdev->wiphy, tmp);
 974         }
 975 }
 976
 977 /* Consumes bss object(s) one way or another */
 978 void cfg80211_connect_done(struct net_device *dev,
 979                            struct cfg80211_connect_resp_params *params,
 980                            gfp_t gfp)
 981 {
 982         struct wireless_dev *wdev = dev->ieee80211_ptr;
 983         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 984         struct cfg80211_event *ev;
 985         unsigned long flags;
 986         u8 *next;
 987         size_t link_info_size = 0;
 988         unsigned int link;
 989
 990         for_each_valid_link(params, link) {
 991                 cfg80211_update_link_bss(wdev, &params->links[link].bss);
 992                 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
 993                 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
 994         }
 995
 996         ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
 997                      params->req_ie_len + params->resp_ie_len +
 998                      params->fils.kek_len + params->fils.pmk_len +
 999                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
1000                      gfp);
1001
1002         if (!ev) {
1003                 for_each_valid_link(params, link)
1004                         cfg80211_put_bss(wdev->wiphy,
1005                                          params->links[link].bss);
1006                 return;
1007         }
1008
1009         ev->type = EVENT_CONNECT_RESULT;
1010         next = ((u8 *)ev) + sizeof(*ev);
1011         if (params->ap_mld_addr) {
1012                 ev->cr.ap_mld_addr = next;
1013                 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1014                        ETH_ALEN);
1015                 next += ETH_ALEN;
1016         }
1017         if (params->req_ie_len) {
1018                 ev->cr.req_ie = next;
1019                 ev->cr.req_ie_len = params->req_ie_len;
1020                 memcpy((void *)ev->cr.req_ie, params->req_ie,
1021                        params->req_ie_len);
1022                 next += params->req_ie_len;
1023         }
1024         if (params->resp_ie_len) {
1025                 ev->cr.resp_ie = next;
1026                 ev->cr.resp_ie_len = params->resp_ie_len;
1027                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1028                        params->resp_ie_len);
1029                 next += params->resp_ie_len;
1030         }
1031         if (params->fils.kek_len) {
1032                 ev->cr.fils.kek = next;
1033                 ev->cr.fils.kek_len = params->fils.kek_len;
1034                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1035                        params->fils.kek_len);
1036                 next += params->fils.kek_len;
1037         }
1038         if (params->fils.pmk_len) {
1039                 ev->cr.fils.pmk = next;
1040                 ev->cr.fils.pmk_len = params->fils.pmk_len;
1041                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1042                        params->fils.pmk_len);
1043                 next += params->fils.pmk_len;
1044         }
1045         if (params->fils.pmkid) {
1046                 ev->cr.fils.pmkid = next;
1047                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1048                        WLAN_PMKID_LEN);
1049                 next += WLAN_PMKID_LEN;
1050         }
1051         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1052         if (params->fils.update_erp_next_seq_num)
1053                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1054         ev->cr.valid_links = params->valid_links;
1055         for_each_valid_link(params, link) {
1056                 if (params->links[link].bss)
1057                         cfg80211_hold_bss(
1058                                 bss_from_pub(params->links[link].bss));
1059                 ev->cr.links[link].bss = params->links[link].bss;
1060
1061                 if (params->links[link].addr) {
1062                         ev->cr.links[link].addr = next;
1063                         memcpy((void *)ev->cr.links[link].addr,
1064                                params->links[link].addr,
1065                                ETH_ALEN);
1066                         next += ETH_ALEN;
1067                 }
1068                 if (params->links[link].bssid) {
1069                         ev->cr.links[link].bssid = next;
1070                         memcpy((void *)ev->cr.links[link].bssid,
1071                                params->links[link].bssid,
1072                                ETH_ALEN);
1073                         next += ETH_ALEN;
1074                 }
1075         }
1076         ev->cr.status = params->status;
1077         ev->cr.timeout_reason = params->timeout_reason;
1078
1079         spin_lock_irqsave(&wdev->event_lock, flags);
1080         list_add_tail(&ev->list, &wdev->event_list);
1081         spin_unlock_irqrestore(&wdev->event_lock, flags);
1082         queue_work(cfg80211_wq, &rdev->event_work);
1083 }
1084 EXPORT_SYMBOL(cfg80211_connect_done);
1085
1086 /* Consumes bss object one way or another */
1087 void __cfg80211_roamed(struct wireless_dev *wdev,
1088                        struct cfg80211_roam_info *info)
1089 {
1090 #ifdef CONFIG_CFG80211_WEXT
1091         union iwreq_data wrqu;
1092 #endif
1093         unsigned int link;
1094         const u8 *connected_addr;
1095
1096         ASSERT_WDEV_LOCK(wdev);
1097
1098         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1099                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1100                 goto out;
1101
1102         if (WARN_ON(!wdev->connected))
1103                 goto out;
1104
1105         if (info->valid_links) {
1106                 if (WARN_ON(!info->ap_mld_addr))
1107                         goto out;
1108
1109                 for_each_valid_link(info, link) {
1110                         if (WARN_ON(!info->links[link].addr))
1111                                 goto out;
1112                 }
1113         }
1114
1115         cfg80211_wdev_release_bsses(wdev);
1116
1117         for_each_valid_link(info, link) {
1118                 if (WARN_ON(!info->links[link].bss))
1119                         goto out;
1120         }
1121
1122         memset(wdev->links, 0, sizeof(wdev->links));
1123         wdev->valid_links = info->valid_links;
1124         for_each_valid_link(info, link) {
1125                 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1126                 wdev->links[link].client.current_bss =
1127                         bss_from_pub(info->links[link].bss);
1128         }
1129
1130         connected_addr = info->valid_links ?
1131                          info->ap_mld_addr :
1132                          info->links[0].bss->bssid;
1133         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1134         if (info->valid_links) {
1135                 for_each_valid_link(info, link)
1136                         memcpy(wdev->links[link].addr, info->links[link].addr,
1137                                ETH_ALEN);
1138         }
1139         wdev->unprot_beacon_reported = 0;
1140         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1141                             wdev->netdev, info, GFP_KERNEL);
1142
1143 #ifdef CONFIG_CFG80211_WEXT
1144         if (!info->valid_links) {
1145                 if (info->req_ie) {
1146                         memset(&wrqu, 0, sizeof(wrqu));
1147                         wrqu.data.length = info->req_ie_len;
1148                         wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1149                                             &wrqu, info->req_ie);
1150                 }
1151
1152                 if (info->resp_ie) {
1153                         memset(&wrqu, 0, sizeof(wrqu));
1154                         wrqu.data.length = info->resp_ie_len;
1155                         wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1156                                             &wrqu, info->resp_ie);
1157                 }
1158
1159                 memset(&wrqu, 0, sizeof(wrqu));
1160                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1161                 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1162                 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1163                 wdev->wext.prev_bssid_valid = true;
1164                 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1165         }
1166 #endif
1167
1168         return;
1169 out:
1170         for_each_valid_link(info, link)
1171                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1172 }
1173
1174 /* Consumes info->links.bss object(s) one way or another */
1175 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1176                      gfp_t gfp)
1177 {
1178         struct wireless_dev *wdev = dev->ieee80211_ptr;
1179         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1180         struct cfg80211_event *ev;
1181         unsigned long flags;
1182         u8 *next;
1183         unsigned int link;
1184         size_t link_info_size = 0;
1185         bool bss_not_found = false;
1186
1187         for_each_valid_link(info, link) {
1188                 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1189                 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1190
1191                 if (info->links[link].bss)
1192                         continue;
1193
1194                 info->links[link].bss =
1195                         cfg80211_get_bss(wdev->wiphy,
1196                                          info->links[link].channel,
1197                                          info->links[link].bssid,
1198                                          wdev->u.client.ssid,
1199                                          wdev->u.client.ssid_len,
1200                                          wdev->conn_bss_type,
1201                                          IEEE80211_PRIVACY_ANY);
1202
1203                 if (!info->links[link].bss) {
1204                         bss_not_found = true;
1205                         break;
1206                 }
1207         }
1208
1209         if (WARN_ON(bss_not_found))
1210                 goto out;
1211
1212         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1213                      info->fils.kek_len + info->fils.pmk_len +
1214                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1215                      (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1216         if (!ev)
1217                 goto out;
1218
1219         ev->type = EVENT_ROAMED;
1220         next = ((u8 *)ev) + sizeof(*ev);
1221         if (info->req_ie_len) {
1222                 ev->rm.req_ie = next;
1223                 ev->rm.req_ie_len = info->req_ie_len;
1224                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1225                 next += info->req_ie_len;
1226         }
1227         if (info->resp_ie_len) {
1228                 ev->rm.resp_ie = next;
1229                 ev->rm.resp_ie_len = info->resp_ie_len;
1230                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1231                        info->resp_ie_len);
1232                 next += info->resp_ie_len;
1233         }
1234         if (info->fils.kek_len) {
1235                 ev->rm.fils.kek = next;
1236                 ev->rm.fils.kek_len = info->fils.kek_len;
1237                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1238                        info->fils.kek_len);
1239                 next += info->fils.kek_len;
1240         }
1241         if (info->fils.pmk_len) {
1242                 ev->rm.fils.pmk = next;
1243                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1244                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1245                        info->fils.pmk_len);
1246                 next += info->fils.pmk_len;
1247         }
1248         if (info->fils.pmkid) {
1249                 ev->rm.fils.pmkid = next;
1250                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1251                        WLAN_PMKID_LEN);
1252                 next += WLAN_PMKID_LEN;
1253         }
1254         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1255         if (info->fils.update_erp_next_seq_num)
1256                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1257         if (info->ap_mld_addr) {
1258                 ev->rm.ap_mld_addr = next;
1259                 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1260                        ETH_ALEN);
1261                 next += ETH_ALEN;
1262         }
1263         ev->rm.valid_links = info->valid_links;
1264         for_each_valid_link(info, link) {
1265                 ev->rm.links[link].bss = info->links[link].bss;
1266
1267                 if (info->links[link].addr) {
1268                         ev->rm.links[link].addr = next;
1269                         memcpy((void *)ev->rm.links[link].addr,
1270                                info->links[link].addr,
1271                                ETH_ALEN);
1272                         next += ETH_ALEN;
1273                 }
1274
1275                 if (info->links[link].bssid) {
1276                         ev->rm.links[link].bssid = next;
1277                         memcpy((void *)ev->rm.links[link].bssid,
1278                                info->links[link].bssid,
1279                                ETH_ALEN);
1280                         next += ETH_ALEN;
1281                 }
1282         }
1283
1284         spin_lock_irqsave(&wdev->event_lock, flags);
1285         list_add_tail(&ev->list, &wdev->event_list);
1286         spin_unlock_irqrestore(&wdev->event_lock, flags);
1287         queue_work(cfg80211_wq, &rdev->event_work);
1288
1289         return;
1290 out:
1291         for_each_valid_link(info, link)
1292                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1293
1294 }
1295 EXPORT_SYMBOL(cfg80211_roamed);
1296
1297 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid,
1298                                         const u8 *td_bitmap, u8 td_bitmap_len)
1299 {
1300         ASSERT_WDEV_LOCK(wdev);
1301
1302         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1303                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1304                 return;
1305
1306         if (WARN_ON(!wdev->connected) ||
1307             WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid)))
1308                 return;
1309
1310         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1311                                      bssid, td_bitmap, td_bitmap_len);
1312 }
1313
1314 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid,
1315                               const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1316 {
1317         struct wireless_dev *wdev = dev->ieee80211_ptr;
1318         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1319         struct cfg80211_event *ev;
1320         unsigned long flags;
1321
1322         if (WARN_ON(!bssid))
1323                 return;
1324
1325         ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1326         if (!ev)
1327                 return;
1328
1329         ev->type = EVENT_PORT_AUTHORIZED;
1330         memcpy(ev->pa.bssid, bssid, ETH_ALEN);
1331         ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1332         ev->pa.td_bitmap_len = td_bitmap_len;
1333         memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1334
1335         /*
1336          * Use the wdev event list so that if there are pending
1337          * connected/roamed events, they will be reported first.
1338          */
1339         spin_lock_irqsave(&wdev->event_lock, flags);
1340         list_add_tail(&ev->list, &wdev->event_list);
1341         spin_unlock_irqrestore(&wdev->event_lock, flags);
1342         queue_work(cfg80211_wq, &rdev->event_work);
1343 }
1344 EXPORT_SYMBOL(cfg80211_port_authorized);
1345
1346 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1347                              size_t ie_len, u16 reason, bool from_ap)
1348 {
1349         struct wireless_dev *wdev = dev->ieee80211_ptr;
1350         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1351         int i;
1352 #ifdef CONFIG_CFG80211_WEXT
1353         union iwreq_data wrqu;
1354 #endif
1355
1356         ASSERT_WDEV_LOCK(wdev);
1357
1358         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1359                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1360                 return;
1361
1362         cfg80211_wdev_release_bsses(wdev);
1363         wdev->connected = false;
1364         wdev->u.client.ssid_len = 0;
1365         wdev->conn_owner_nlportid = 0;
1366         kfree_sensitive(wdev->connect_keys);
1367         wdev->connect_keys = NULL;
1368
1369         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1370
1371         /* stop critical protocol if supported */
1372         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1373                 rdev->crit_proto_nlportid = 0;
1374                 rdev_crit_proto_stop(rdev, wdev);
1375         }
1376
1377         /*
1378          * Delete all the keys ... pairwise keys can't really
1379          * exist any more anyway, but default keys might.
1380          */
1381         if (rdev->ops->del_key) {
1382                 int max_key_idx = 5;
1383
1384                 if (wiphy_ext_feature_isset(
1385                             wdev->wiphy,
1386                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1387                     wiphy_ext_feature_isset(
1388                             wdev->wiphy,
1389                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1390                         max_key_idx = 7;
1391                 for (i = 0; i <= max_key_idx; i++)
1392                         rdev_del_key(rdev, dev, -1, i, false, NULL);
1393         }
1394
1395         rdev_set_qos_map(rdev, dev, NULL);
1396
1397 #ifdef CONFIG_CFG80211_WEXT
1398         memset(&wrqu, 0, sizeof(wrqu));
1399         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1400         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1401         wdev->wext.connect.ssid_len = 0;
1402 #endif
1403
1404         schedule_work(&cfg80211_disconnect_work);
1405 }
1406
1407 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1408                            const u8 *ie, size_t ie_len,
1409                            bool locally_generated, gfp_t gfp)
1410 {
1411         struct wireless_dev *wdev = dev->ieee80211_ptr;
1412         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1413         struct cfg80211_event *ev;
1414         unsigned long flags;
1415
1416         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1417         if (!ev)
1418                 return;
1419
1420         ev->type = EVENT_DISCONNECTED;
1421         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1422         ev->dc.ie_len = ie_len;
1423         memcpy((void *)ev->dc.ie, ie, ie_len);
1424         ev->dc.reason = reason;
1425         ev->dc.locally_generated = locally_generated;
1426
1427         spin_lock_irqsave(&wdev->event_lock, flags);
1428         list_add_tail(&ev->list, &wdev->event_list);
1429         spin_unlock_irqrestore(&wdev->event_lock, flags);
1430         queue_work(cfg80211_wq, &rdev->event_work);
1431 }
1432 EXPORT_SYMBOL(cfg80211_disconnected);
1433
1434 /*
1435  * API calls for nl80211/wext compatibility code
1436  */
1437 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1438                      struct net_device *dev,
1439                      struct cfg80211_connect_params *connect,
1440                      struct cfg80211_cached_keys *connkeys,
1441                      const u8 *prev_bssid)
1442 {
1443         struct wireless_dev *wdev = dev->ieee80211_ptr;
1444         int err;
1445
1446         ASSERT_WDEV_LOCK(wdev);
1447
1448         /*
1449          * If we have an ssid_len, we're trying to connect or are
1450          * already connected, so reject a new SSID unless it's the
1451          * same (which is the case for re-association.)
1452          */
1453         if (wdev->u.client.ssid_len &&
1454             (wdev->u.client.ssid_len != connect->ssid_len ||
1455              memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1456                 return -EALREADY;
1457
1458         /*
1459          * If connected, reject (re-)association unless prev_bssid
1460          * matches the current BSSID.
1461          */
1462         if (wdev->connected) {
1463                 if (!prev_bssid)
1464                         return -EALREADY;
1465                 if (!ether_addr_equal(prev_bssid,
1466                                       wdev->u.client.connected_addr))
1467                         return -ENOTCONN;
1468         }
1469
1470         /*
1471          * Reject if we're in the process of connecting with WEP,
1472          * this case isn't very interesting and trying to handle
1473          * it would make the code much more complex.
1474          */
1475         if (wdev->connect_keys)
1476                 return -EINPROGRESS;
1477
1478         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1479                                   rdev->wiphy.ht_capa_mod_mask);
1480         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1481                                    rdev->wiphy.vht_capa_mod_mask);
1482
1483         if (connkeys && connkeys->def >= 0) {
1484                 int idx;
1485                 u32 cipher;
1486
1487                 idx = connkeys->def;
1488                 cipher = connkeys->params[idx].cipher;
1489                 /* If given a WEP key we may need it for shared key auth */
1490                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1491                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1492                         connect->key_idx = idx;
1493                         connect->key = connkeys->params[idx].key;
1494                         connect->key_len = connkeys->params[idx].key_len;
1495
1496                         /*
1497                          * If ciphers are not set (e.g. when going through
1498                          * iwconfig), we have to set them appropriately here.
1499                          */
1500                         if (connect->crypto.cipher_group == 0)
1501                                 connect->crypto.cipher_group = cipher;
1502
1503                         if (connect->crypto.n_ciphers_pairwise == 0) {
1504                                 connect->crypto.n_ciphers_pairwise = 1;
1505                                 connect->crypto.ciphers_pairwise[0] = cipher;
1506                         }
1507                 }
1508         } else {
1509                 if (WARN_ON(connkeys))
1510                         return -EINVAL;
1511
1512                 /* connect can point to wdev->wext.connect which
1513                  * can hold key data from a previous connection
1514                  */
1515                 connect->key = NULL;
1516                 connect->key_len = 0;
1517                 connect->key_idx = 0;
1518         }
1519
1520         wdev->connect_keys = connkeys;
1521         memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1522         wdev->u.client.ssid_len = connect->ssid_len;
1523
1524         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1525                                               IEEE80211_BSS_TYPE_ESS;
1526
1527         if (!rdev->ops->connect)
1528                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1529         else
1530                 err = rdev_connect(rdev, dev, connect);
1531
1532         if (err) {
1533                 wdev->connect_keys = NULL;
1534                 /*
1535                  * This could be reassoc getting refused, don't clear
1536                  * ssid_len in that case.
1537                  */
1538                 if (!wdev->connected)
1539                         wdev->u.client.ssid_len = 0;
1540                 return err;
1541         }
1542
1543         return 0;
1544 }
1545
1546 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1547                         struct net_device *dev, u16 reason, bool wextev)
1548 {
1549         struct wireless_dev *wdev = dev->ieee80211_ptr;
1550         int err = 0;
1551
1552         ASSERT_WDEV_LOCK(wdev);
1553
1554         kfree_sensitive(wdev->connect_keys);
1555         wdev->connect_keys = NULL;
1556
1557         wdev->conn_owner_nlportid = 0;
1558
1559         if (wdev->conn)
1560                 err = cfg80211_sme_disconnect(wdev, reason);
1561         else if (!rdev->ops->disconnect)
1562                 cfg80211_mlme_down(rdev, dev);
1563         else if (wdev->u.client.ssid_len)
1564                 err = rdev_disconnect(rdev, dev, reason);
1565
1566         /*
1567          * Clear ssid_len unless we actually were fully connected,
1568          * in which case cfg80211_disconnected() will take care of
1569          * this later.
1570          */
1571         if (!wdev->connected)
1572                 wdev->u.client.ssid_len = 0;
1573
1574         return err;
1575 }
1576
1577 /*
1578  * Used to clean up after the connection / connection attempt owner socket
1579  * disconnects
1580  */
1581 void cfg80211_autodisconnect_wk(struct work_struct *work)
1582 {
1583         struct wireless_dev *wdev =
1584                 container_of(work, struct wireless_dev, disconnect_wk);
1585         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1586
1587         wiphy_lock(wdev->wiphy);
1588         wdev_lock(wdev);
1589
1590         if (wdev->conn_owner_nlportid) {
1591                 switch (wdev->iftype) {
1592                 case NL80211_IFTYPE_ADHOC:
1593                         __cfg80211_leave_ibss(rdev, wdev->netdev, false);
1594                         break;
1595                 case NL80211_IFTYPE_AP:
1596                 case NL80211_IFTYPE_P2P_GO:
1597                         __cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1598                         break;
1599                 case NL80211_IFTYPE_MESH_POINT:
1600                         __cfg80211_leave_mesh(rdev, wdev->netdev);
1601                         break;
1602                 case NL80211_IFTYPE_STATION:
1603                 case NL80211_IFTYPE_P2P_CLIENT:
1604                         /*
1605                          * Use disconnect_bssid if still connecting and
1606                          * ops->disconnect not implemented.  Otherwise we can
1607                          * use cfg80211_disconnect.
1608                          */
1609                         if (rdev->ops->disconnect || wdev->connected)
1610                                 cfg80211_disconnect(rdev, wdev->netdev,
1611                                                     WLAN_REASON_DEAUTH_LEAVING,
1612                                                     true);
1613                         else
1614                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1615                                                      wdev->disconnect_bssid,
1616                                                      NULL, 0,
1617                                                      WLAN_REASON_DEAUTH_LEAVING,
1618                                                      false);
1619                         break;
1620                 default:
1621                         break;
1622                 }
1623         }
1624
1625         wdev_unlock(wdev);
1626         wiphy_unlock(wdev->wiphy);
1627 }