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