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, 2022-2024 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         lockdep_assert_wiphy(wdev->wiphy);
  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 +
 119                 struct_size(request, channels, n_channels);
 120         request->n_ssids = 1;
 121
 122         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 123                 wdev->conn->params.ssid_len);
 124         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 125
 126         eth_broadcast_addr(request->bssid);
 127
 128         request->wdev = wdev;
 129         request->wiphy = &rdev->wiphy;
 130         request->scan_start = jiffies;
 131
 132         rdev->scan_req = request;
 133
 134         err = cfg80211_scan(rdev);
 135         if (!err) {
 136                 wdev->conn->state = CFG80211_CONN_SCANNING;
 137                 nl80211_send_scan_start(rdev, wdev);
 138                 dev_hold(wdev->netdev);
 139         } else {
 140                 rdev->scan_req = NULL;
 141                 kfree(request);
 142         }
 143         return err;
 144 }
 145
 146 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 147                                  enum nl80211_timeout_reason *treason)
 148 {
 149         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 150         struct cfg80211_connect_params *params;
 151         struct cfg80211_auth_request auth_req = {};
 152         struct cfg80211_assoc_request req = {};
 153         int err;
 154
 155         lockdep_assert_wiphy(wdev->wiphy);
 156
 157         if (!wdev->conn)
 158                 return 0;
 159
 160         params = &wdev->conn->params;
 161
 162         switch (wdev->conn->state) {
 163         case CFG80211_CONN_SCANNING:
 164                 /* didn't find it during scan ... */
 165                 return -ENOENT;
 166         case CFG80211_CONN_SCAN_AGAIN:
 167                 return cfg80211_conn_scan(wdev);
 168         case CFG80211_CONN_AUTHENTICATE_NEXT:
 169                 if (WARN_ON(!rdev->ops->auth))
 170                         return -EOPNOTSUPP;
 171                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 172                 auth_req.key = params->key;
 173                 auth_req.key_len = params->key_len;
 174                 auth_req.key_idx = params->key_idx;
 175                 auth_req.auth_type = params->auth_type;
 176                 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 177                                                 params->bssid,
 178                                                 params->ssid, params->ssid_len,
 179                                                 IEEE80211_BSS_TYPE_ESS,
 180                                                 IEEE80211_PRIVACY_ANY);
 181                 auth_req.link_id = -1;
 182                 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
 183                 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
 184                 return err;
 185         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 186                 *treason = NL80211_TIMEOUT_AUTH;
 187                 return -ENOTCONN;
 188         case CFG80211_CONN_ASSOCIATE_NEXT:
 189                 if (WARN_ON(!rdev->ops->assoc))
 190                         return -EOPNOTSUPP;
 191                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 192                 if (wdev->conn->prev_bssid_valid)
 193                         req.prev_bssid = wdev->conn->prev_bssid;
 194                 req.ie = params->ie;
 195                 req.ie_len = params->ie_len;
 196                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 197                 req.crypto = params->crypto;
 198                 req.flags = params->flags;
 199                 req.ht_capa = params->ht_capa;
 200                 req.ht_capa_mask = params->ht_capa_mask;
 201                 req.vht_capa = params->vht_capa;
 202                 req.vht_capa_mask = params->vht_capa_mask;
 203                 req.link_id = -1;
 204
 205                 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 206                                            params->bssid,
 207                                            params->ssid, params->ssid_len,
 208                                            IEEE80211_BSS_TYPE_ESS,
 209                                            IEEE80211_PRIVACY_ANY);
 210                 if (!req.bss) {
 211                         err = -ENOENT;
 212                 } else {
 213                         err = cfg80211_mlme_assoc(rdev, wdev->netdev,
 214                                                   &req, NULL);
 215                         cfg80211_put_bss(&rdev->wiphy, req.bss);
 216                 }
 217
 218                 if (err)
 219                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 220                                              NULL, 0,
 221                                              WLAN_REASON_DEAUTH_LEAVING,
 222                                              false);
 223                 return err;
 224         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 225                 *treason = NL80211_TIMEOUT_ASSOC;
 226                 fallthrough;
 227         case CFG80211_CONN_ASSOC_FAILED:
 228                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 229                                      NULL, 0,
 230                                      WLAN_REASON_DEAUTH_LEAVING, false);
 231                 return -ENOTCONN;
 232         case CFG80211_CONN_DEAUTH:
 233                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 234                                      NULL, 0,
 235                                      WLAN_REASON_DEAUTH_LEAVING, false);
 236                 fallthrough;
 237         case CFG80211_CONN_ABANDON:
 238                 /* free directly, disconnected event already sent */
 239                 cfg80211_sme_free(wdev);
 240                 return 0;
 241         default:
 242                 return 0;
 243         }
 244 }
 245
 246 void cfg80211_conn_work(struct work_struct *work)
 247 {
 248         struct cfg80211_registered_device *rdev =
 249                 container_of(work, struct cfg80211_registered_device, conn_work);
 250         struct wireless_dev *wdev;
 251         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 252         enum nl80211_timeout_reason treason;
 253
 254         wiphy_lock(&rdev->wiphy);
 255
 256         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 257                 if (!wdev->netdev)
 258                         continue;
 259
 260                 if (!netif_running(wdev->netdev))
 261                         continue;
 262
 263                 if (!wdev->conn ||
 264                     wdev->conn->state == CFG80211_CONN_CONNECTED)
 265                         continue;
 266
 267                 if (wdev->conn->params.bssid) {
 268                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 269                         bssid = bssid_buf;
 270                 }
 271                 treason = NL80211_TIMEOUT_UNSPECIFIED;
 272                 if (cfg80211_conn_do_work(wdev, &treason)) {
 273                         struct cfg80211_connect_resp_params cr;
 274
 275                         memset(&cr, 0, sizeof(cr));
 276                         cr.status = -1;
 277                         cr.links[0].bssid = bssid;
 278                         cr.timeout_reason = treason;
 279                         __cfg80211_connect_result(wdev->netdev, &cr, false);
 280                 }
 281         }
 282
 283         wiphy_unlock(&rdev->wiphy);
 284 }
 285
 286 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
 287                                     struct cfg80211_bss *bss)
 288 {
 289         memcpy(conn->bssid, bss->bssid, ETH_ALEN);
 290         conn->params.bssid = conn->bssid;
 291         conn->params.channel = bss->channel;
 292         conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 293 }
 294
 295 /* Returned bss is reference counted and must be cleaned up appropriately. */
 296 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 297 {
 298         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 299         struct cfg80211_bss *bss;
 300
 301         lockdep_assert_wiphy(wdev->wiphy);
 302
 303         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 304                                wdev->conn->params.bssid,
 305                                wdev->conn->params.ssid,
 306                                wdev->conn->params.ssid_len,
 307                                wdev->conn_bss_type,
 308                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 309         if (!bss)
 310                 return NULL;
 311
 312         cfg80211_step_auth_next(wdev->conn, bss);
 313         schedule_work(&rdev->conn_work);
 314
 315         return bss;
 316 }
 317
 318 void cfg80211_sme_scan_done(struct net_device *dev)
 319 {
 320         struct wireless_dev *wdev = dev->ieee80211_ptr;
 321         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 322         struct cfg80211_bss *bss;
 323
 324         lockdep_assert_wiphy(wdev->wiphy);
 325
 326         if (!wdev->conn)
 327                 return;
 328
 329         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 330             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 331                 return;
 332
 333         bss = cfg80211_get_conn_bss(wdev);
 334         if (bss)
 335                 cfg80211_put_bss(&rdev->wiphy, bss);
 336         else
 337                 schedule_work(&rdev->conn_work);
 338 }
 339
 340 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 341 {
 342         struct wiphy *wiphy = wdev->wiphy;
 343         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 344         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 345         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 346
 347         lockdep_assert_wiphy(wdev->wiphy);
 348
 349         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 350                 return;
 351
 352         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 353             wdev->conn->auto_auth &&
 354             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 355                 /* select automatically between only open, shared, leap */
 356                 switch (wdev->conn->params.auth_type) {
 357                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 358                         if (wdev->connect_keys)
 359                                 wdev->conn->params.auth_type =
 360                                         NL80211_AUTHTYPE_SHARED_KEY;
 361                         else
 362                                 wdev->conn->params.auth_type =
 363                                         NL80211_AUTHTYPE_NETWORK_EAP;
 364                         break;
 365                 case NL80211_AUTHTYPE_SHARED_KEY:
 366                         wdev->conn->params.auth_type =
 367                                 NL80211_AUTHTYPE_NETWORK_EAP;
 368                         break;
 369                 default:
 370                         /* huh? */
 371                         wdev->conn->params.auth_type =
 372                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 373                         break;
 374                 }
 375                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 376                 schedule_work(&rdev->conn_work);
 377         } else if (status_code != WLAN_STATUS_SUCCESS) {
 378                 struct cfg80211_connect_resp_params cr;
 379
 380                 memset(&cr, 0, sizeof(cr));
 381                 cr.status = status_code;
 382                 cr.links[0].bssid = mgmt->bssid;
 383                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 384                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 385         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 386                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 387                 schedule_work(&rdev->conn_work);
 388         }
 389 }
 390
 391 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 392 {
 393         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 394
 395         if (!wdev->conn)
 396                 return false;
 397
 398         if (status == WLAN_STATUS_SUCCESS) {
 399                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 400                 return false;
 401         }
 402
 403         if (wdev->conn->prev_bssid_valid) {
 404                 /*
 405                  * Some stupid APs don't accept reassoc, so we
 406                  * need to fall back to trying regular assoc;
 407                  * return true so no event is sent to userspace.
 408                  */
 409                 wdev->conn->prev_bssid_valid = false;
 410                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 411                 schedule_work(&rdev->conn_work);
 412                 return true;
 413         }
 414
 415         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 416         schedule_work(&rdev->conn_work);
 417         return false;
 418 }
 419
 420 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 421 {
 422         cfg80211_sme_free(wdev);
 423 }
 424
 425 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 426 {
 427         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 428
 429         if (!wdev->conn)
 430                 return;
 431
 432         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 433         schedule_work(&rdev->conn_work);
 434 }
 435
 436 void cfg80211_sme_disassoc(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_DEAUTH;
 444         schedule_work(&rdev->conn_work);
 445 }
 446
 447 void cfg80211_sme_assoc_timeout(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_ASSOC_FAILED_TIMEOUT;
 455         schedule_work(&rdev->conn_work);
 456 }
 457
 458 void cfg80211_sme_abandon_assoc(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_ABANDON;
 466         schedule_work(&rdev->conn_work);
 467 }
 468
 469 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
 470 {
 471         unsigned int link;
 472
 473         for_each_valid_link(wdev, link) {
 474                 if (!wdev->links[link].client.current_bss)
 475                         continue;
 476                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 477                 cfg80211_put_bss(wdev->wiphy,
 478                                  &wdev->links[link].client.current_bss->pub);
 479                 wdev->links[link].client.current_bss = NULL;
 480         }
 481 }
 482
 483 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
 484 {
 485         unsigned int link;
 486
 487         for_each_valid_link(wdev, link) {
 488                 if (!wdev->links[link].client.current_bss ||
 489                     !(link_mask & BIT(link)))
 490                         continue;
 491                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 492                 cfg80211_put_bss(wdev->wiphy,
 493                                  &wdev->links[link].client.current_bss->pub);
 494                 wdev->links[link].client.current_bss = NULL;
 495         }
 496 }
 497
 498 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 499                                      const u8 *ies, size_t ies_len,
 500                                      const u8 **out_ies, size_t *out_ies_len)
 501 {
 502         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 503         u8 *buf;
 504         size_t offs;
 505
 506         if (!rdev->wiphy.extended_capabilities_len ||
 507             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 508                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 509                 if (!*out_ies)
 510                         return -ENOMEM;
 511                 *out_ies_len = ies_len;
 512                 return 0;
 513         }
 514
 515         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 516                       GFP_KERNEL);
 517         if (!buf)
 518                 return -ENOMEM;
 519
 520         if (ies_len) {
 521                 static const u8 before_extcapa[] = {
 522                         /* not listing IEs expected to be created by driver */
 523                         WLAN_EID_RSN,
 524                         WLAN_EID_QOS_CAPA,
 525                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 526                         WLAN_EID_MOBILITY_DOMAIN,
 527                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 528                         WLAN_EID_BSS_COEX_2040,
 529                 };
 530
 531                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 532                                           ARRAY_SIZE(before_extcapa), 0);
 533                 memcpy(buf, ies, offs);
 534                 /* leave a whole for extended capabilities IE */
 535                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 536                        ies + offs, ies_len - offs);
 537         } else {
 538                 offs = 0;
 539         }
 540
 541         /* place extended capabilities IE (with only driver capabilities) */
 542         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 543         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 544         memcpy(buf + offs + 2,
 545                rdev->wiphy.extended_capabilities,
 546                rdev->wiphy.extended_capabilities_len);
 547
 548         *out_ies = buf;
 549         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 550
 551         return 0;
 552 }
 553
 554 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 555                                 struct cfg80211_connect_params *connect,
 556                                 const u8 *prev_bssid)
 557 {
 558         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 559         struct cfg80211_bss *bss;
 560         int err;
 561
 562         if (!rdev->ops->auth || !rdev->ops->assoc)
 563                 return -EOPNOTSUPP;
 564
 565         cfg80211_wdev_release_bsses(wdev);
 566
 567         if (wdev->connected) {
 568                 cfg80211_sme_free(wdev);
 569                 wdev->connected = false;
 570         }
 571
 572         if (wdev->conn)
 573                 return -EINPROGRESS;
 574
 575         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 576         if (!wdev->conn)
 577                 return -ENOMEM;
 578
 579         /*
 580          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 581          */
 582         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 583         if (connect->bssid) {
 584                 wdev->conn->params.bssid = wdev->conn->bssid;
 585                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 586         }
 587
 588         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 589                                       &wdev->conn->ie,
 590                                       &wdev->conn->params.ie_len)) {
 591                 kfree(wdev->conn);
 592                 wdev->conn = NULL;
 593                 return -ENOMEM;
 594         }
 595         wdev->conn->params.ie = wdev->conn->ie;
 596
 597         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 598                 wdev->conn->auto_auth = true;
 599                 /* start with open system ... should mostly work */
 600                 wdev->conn->params.auth_type =
 601                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 602         } else {
 603                 wdev->conn->auto_auth = false;
 604         }
 605
 606         wdev->conn->params.ssid = wdev->u.client.ssid;
 607         wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
 608
 609         /* see if we have the bss already */
 610         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 611                                wdev->conn->params.bssid,
 612                                wdev->conn->params.ssid,
 613                                wdev->conn->params.ssid_len,
 614                                wdev->conn_bss_type,
 615                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 616
 617         if (prev_bssid) {
 618                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 619                 wdev->conn->prev_bssid_valid = true;
 620         }
 621
 622         /* we're good if we have a matching bss struct */
 623         if (bss) {
 624                 enum nl80211_timeout_reason treason;
 625
 626                 cfg80211_step_auth_next(wdev->conn, bss);
 627                 err = cfg80211_conn_do_work(wdev, &treason);
 628                 cfg80211_put_bss(wdev->wiphy, bss);
 629         } else {
 630                 /* otherwise we'll need to scan for the AP first */
 631                 err = cfg80211_conn_scan(wdev);
 632
 633                 /*
 634                  * If we can't scan right now, then we need to scan again
 635                  * after the current scan finished, since the parameters
 636                  * changed (unless we find a good AP anyway).
 637                  */
 638                 if (err == -EBUSY) {
 639                         err = 0;
 640                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 641                 }
 642         }
 643
 644         if (err)
 645                 cfg80211_sme_free(wdev);
 646
 647         return err;
 648 }
 649
 650 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 651 {
 652         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 653         int err;
 654
 655         if (!wdev->conn)
 656                 return 0;
 657
 658         if (!rdev->ops->deauth)
 659                 return -EOPNOTSUPP;
 660
 661         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 662             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 663                 err = 0;
 664                 goto out;
 665         }
 666
 667         /* wdev->conn->params.bssid must be set if > SCANNING */
 668         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 669                                    wdev->conn->params.bssid,
 670                                    NULL, 0, reason, false);
 671  out:
 672         cfg80211_sme_free(wdev);
 673         return err;
 674 }
 675
 676 /*
 677  * code shared for in-device and software SME
 678  */
 679
 680 static bool cfg80211_is_all_idle(void)
 681 {
 682         struct cfg80211_registered_device *rdev;
 683         struct wireless_dev *wdev;
 684         bool is_all_idle = true;
 685
 686         /*
 687          * All devices must be idle as otherwise if you are actively
 688          * scanning some new beacon hints could be learned and would
 689          * count as new regulatory hints.
 690          * Also if there is any other active beaconing interface we
 691          * need not issue a disconnect hint and reset any info such
 692          * as chan dfs state, etc.
 693          */
 694         for_each_rdev(rdev) {
 695                 wiphy_lock(&rdev->wiphy);
 696                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 697                         if (wdev->conn || wdev->connected ||
 698                             cfg80211_beaconing_iface_active(wdev))
 699                                 is_all_idle = false;
 700                 }
 701                 wiphy_unlock(&rdev->wiphy);
 702         }
 703
 704         return is_all_idle;
 705 }
 706
 707 static void disconnect_work(struct work_struct *work)
 708 {
 709         rtnl_lock();
 710         if (cfg80211_is_all_idle())
 711                 regulatory_hint_disconnect();
 712         rtnl_unlock();
 713 }
 714
 715 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 716
 717 static void
 718 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
 719                                       struct cfg80211_connect_resp_params *cr)
 720 {
 721         unsigned int link;
 722
 723         for_each_valid_link(cr, link) {
 724                 if (!cr->links[link].bss)
 725                         continue;
 726                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 727                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 728         }
 729 }
 730
 731 /*
 732  * API calls for drivers implementing connect/disconnect and
 733  * SME event handling
 734  */
 735
 736 /* This method must consume bss one way or another */
 737 void __cfg80211_connect_result(struct net_device *dev,
 738                                struct cfg80211_connect_resp_params *cr,
 739                                bool wextev)
 740 {
 741         struct wireless_dev *wdev = dev->ieee80211_ptr;
 742         const struct element *country_elem = NULL;
 743         const struct element *ssid;
 744         const u8 *country_data;
 745         u8 country_datalen;
 746 #ifdef CONFIG_CFG80211_WEXT
 747         union iwreq_data wrqu;
 748 #endif
 749         unsigned int link;
 750         const u8 *connected_addr;
 751         bool bss_not_found = false;
 752
 753         lockdep_assert_wiphy(wdev->wiphy);
 754
 755         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 756                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 757                 goto out;
 758
 759         if (cr->valid_links) {
 760                 if (WARN_ON(!cr->ap_mld_addr))
 761                         goto out;
 762
 763                 for_each_valid_link(cr, link) {
 764                         if (WARN_ON(!cr->links[link].addr))
 765                                 goto out;
 766                 }
 767
 768                 if (WARN_ON(wdev->connect_keys))
 769                         goto out;
 770         }
 771
 772         wdev->unprot_beacon_reported = 0;
 773         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 774                                     GFP_KERNEL);
 775         connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
 776
 777 #ifdef CONFIG_CFG80211_WEXT
 778         if (wextev && !cr->valid_links) {
 779                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 780                         memset(&wrqu, 0, sizeof(wrqu));
 781                         wrqu.data.length = cr->req_ie_len;
 782                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 783                                             cr->req_ie);
 784                 }
 785
 786                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 787                         memset(&wrqu, 0, sizeof(wrqu));
 788                         wrqu.data.length = cr->resp_ie_len;
 789                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 790                                             cr->resp_ie);
 791                 }
 792
 793                 memset(&wrqu, 0, sizeof(wrqu));
 794                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 795                 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
 796                         memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
 797                         memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
 798                         wdev->wext.prev_bssid_valid = true;
 799                 }
 800                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 801         }
 802 #endif
 803
 804         if (cr->status == WLAN_STATUS_SUCCESS) {
 805                 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
 806                         for_each_valid_link(cr, link) {
 807                                 if (WARN_ON_ONCE(!cr->links[link].bss))
 808                                         break;
 809                         }
 810                 }
 811
 812                 for_each_valid_link(cr, link) {
 813                         /* don't do extra lookups for failures */
 814                         if (cr->links[link].status != WLAN_STATUS_SUCCESS)
 815                                 continue;
 816
 817                         if (cr->links[link].bss)
 818                                 continue;
 819
 820                         cr->links[link].bss =
 821                                 cfg80211_get_bss(wdev->wiphy, NULL,
 822                                                  cr->links[link].bssid,
 823                                                  wdev->u.client.ssid,
 824                                                  wdev->u.client.ssid_len,
 825                                                  wdev->conn_bss_type,
 826                                                  IEEE80211_PRIVACY_ANY);
 827                         if (!cr->links[link].bss) {
 828                                 bss_not_found = true;
 829                                 break;
 830                         }
 831                         cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
 832                 }
 833         }
 834
 835         cfg80211_wdev_release_bsses(wdev);
 836
 837         if (cr->status != WLAN_STATUS_SUCCESS) {
 838                 kfree_sensitive(wdev->connect_keys);
 839                 wdev->connect_keys = NULL;
 840                 wdev->u.client.ssid_len = 0;
 841                 wdev->conn_owner_nlportid = 0;
 842                 cfg80211_connect_result_release_bsses(wdev, cr);
 843                 cfg80211_sme_free(wdev);
 844                 return;
 845         }
 846
 847         if (WARN_ON(bss_not_found)) {
 848                 cfg80211_connect_result_release_bsses(wdev, cr);
 849                 return;
 850         }
 851
 852         memset(wdev->links, 0, sizeof(wdev->links));
 853         for_each_valid_link(cr, link) {
 854                 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
 855                         continue;
 856                 cr->valid_links &= ~BIT(link);
 857                 /* don't require bss pointer for failed links */
 858                 if (!cr->links[link].bss)
 859                         continue;
 860                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 861                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 862         }
 863         wdev->valid_links = cr->valid_links;
 864         for_each_valid_link(cr, link)
 865                 wdev->links[link].client.current_bss =
 866                         bss_from_pub(cr->links[link].bss);
 867         wdev->connected = true;
 868         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
 869         if (cr->valid_links) {
 870                 for_each_valid_link(cr, link)
 871                         memcpy(wdev->links[link].addr, cr->links[link].addr,
 872                                ETH_ALEN);
 873         }
 874
 875         cfg80211_upload_connect_keys(wdev);
 876
 877         rcu_read_lock();
 878         for_each_valid_link(cr, link) {
 879                 country_elem =
 880                         ieee80211_bss_get_elem(cr->links[link].bss,
 881                                                WLAN_EID_COUNTRY);
 882                 if (country_elem)
 883                         break;
 884         }
 885         if (!country_elem) {
 886                 rcu_read_unlock();
 887                 return;
 888         }
 889
 890         country_datalen = country_elem->datalen;
 891         country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
 892         rcu_read_unlock();
 893
 894         if (!country_data)
 895                 return;
 896
 897         regulatory_hint_country_ie(wdev->wiphy,
 898                                    cr->links[link].bss->channel->band,
 899                                    country_data, country_datalen);
 900         kfree(country_data);
 901
 902         if (!wdev->u.client.ssid_len) {
 903                 rcu_read_lock();
 904                 for_each_valid_link(cr, link) {
 905                         ssid = ieee80211_bss_get_elem(cr->links[link].bss,
 906                                                       WLAN_EID_SSID);
 907
 908                         if (!ssid || !ssid->datalen)
 909                                 continue;
 910
 911                         memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
 912                         wdev->u.client.ssid_len = ssid->datalen;
 913                         break;
 914                 }
 915                 rcu_read_unlock();
 916         }
 917
 918         return;
 919 out:
 920         for_each_valid_link(cr, link)
 921                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 922 }
 923
 924 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
 925                                      struct cfg80211_bss **bss)
 926 {
 927         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 928         struct cfg80211_internal_bss *ibss;
 929
 930         if (!*bss)
 931                 return;
 932
 933         ibss = bss_from_pub(*bss);
 934         if (list_empty(&ibss->list)) {
 935                 struct cfg80211_bss *found = NULL, *tmp = *bss;
 936
 937                 found = cfg80211_get_bss(wdev->wiphy, NULL,
 938                                          (*bss)->bssid,
 939                                          wdev->u.client.ssid,
 940                                          wdev->u.client.ssid_len,
 941                                          wdev->conn_bss_type,
 942                                          IEEE80211_PRIVACY_ANY);
 943                 if (found) {
 944                         /* The same BSS is already updated so use it
 945                          * instead, as it has latest info.
 946                          */
 947                         *bss = found;
 948                 } else {
 949                         /* Update with BSS provided by driver, it will
 950                          * be freshly added and ref cnted, we can free
 951                          * the old one.
 952                          *
 953                          * signal_valid can be false, as we are not
 954                          * expecting the BSS to be found.
 955                          *
 956                          * keep the old timestamp to avoid confusion
 957                          */
 958                         cfg80211_bss_update(rdev, ibss, false,
 959                                             ibss->ts);
 960                 }
 961
 962                 cfg80211_put_bss(wdev->wiphy, tmp);
 963         }
 964 }
 965
 966 /* Consumes bss object(s) one way or another */
 967 void cfg80211_connect_done(struct net_device *dev,
 968                            struct cfg80211_connect_resp_params *params,
 969                            gfp_t gfp)
 970 {
 971         struct wireless_dev *wdev = dev->ieee80211_ptr;
 972         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 973         struct cfg80211_event *ev;
 974         unsigned long flags;
 975         u8 *next;
 976         size_t link_info_size = 0;
 977         unsigned int link;
 978
 979         for_each_valid_link(params, link) {
 980                 cfg80211_update_link_bss(wdev, &params->links[link].bss);
 981                 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
 982                 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
 983         }
 984
 985         ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
 986                      params->req_ie_len + params->resp_ie_len +
 987                      params->fils.kek_len + params->fils.pmk_len +
 988                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
 989                      gfp);
 990
 991         if (!ev) {
 992                 for_each_valid_link(params, link)
 993                         cfg80211_put_bss(wdev->wiphy,
 994                                          params->links[link].bss);
 995                 return;
 996         }
 997
 998         ev->type = EVENT_CONNECT_RESULT;
 999         next = ((u8 *)ev) + sizeof(*ev);
1000         if (params->ap_mld_addr) {
1001                 ev->cr.ap_mld_addr = next;
1002                 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1003                        ETH_ALEN);
1004                 next += ETH_ALEN;
1005         }
1006         if (params->req_ie_len) {
1007                 ev->cr.req_ie = next;
1008                 ev->cr.req_ie_len = params->req_ie_len;
1009                 memcpy((void *)ev->cr.req_ie, params->req_ie,
1010                        params->req_ie_len);
1011                 next += params->req_ie_len;
1012         }
1013         if (params->resp_ie_len) {
1014                 ev->cr.resp_ie = next;
1015                 ev->cr.resp_ie_len = params->resp_ie_len;
1016                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1017                        params->resp_ie_len);
1018                 next += params->resp_ie_len;
1019         }
1020         if (params->fils.kek_len) {
1021                 ev->cr.fils.kek = next;
1022                 ev->cr.fils.kek_len = params->fils.kek_len;
1023                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1024                        params->fils.kek_len);
1025                 next += params->fils.kek_len;
1026         }
1027         if (params->fils.pmk_len) {
1028                 ev->cr.fils.pmk = next;
1029                 ev->cr.fils.pmk_len = params->fils.pmk_len;
1030                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1031                        params->fils.pmk_len);
1032                 next += params->fils.pmk_len;
1033         }
1034         if (params->fils.pmkid) {
1035                 ev->cr.fils.pmkid = next;
1036                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1037                        WLAN_PMKID_LEN);
1038                 next += WLAN_PMKID_LEN;
1039         }
1040         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1041         if (params->fils.update_erp_next_seq_num)
1042                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1043         ev->cr.valid_links = params->valid_links;
1044         for_each_valid_link(params, link) {
1045                 if (params->links[link].bss)
1046                         cfg80211_hold_bss(
1047                                 bss_from_pub(params->links[link].bss));
1048                 ev->cr.links[link].bss = params->links[link].bss;
1049                 ev->cr.links[link].status = params->links[link].status;
1050
1051                 if (params->links[link].addr) {
1052                         ev->cr.links[link].addr = next;
1053                         memcpy((void *)ev->cr.links[link].addr,
1054                                params->links[link].addr,
1055                                ETH_ALEN);
1056                         next += ETH_ALEN;
1057                 }
1058                 if (params->links[link].bssid) {
1059                         ev->cr.links[link].bssid = next;
1060                         memcpy((void *)ev->cr.links[link].bssid,
1061                                params->links[link].bssid,
1062                                ETH_ALEN);
1063                         next += ETH_ALEN;
1064                 }
1065         }
1066         ev->cr.status = params->status;
1067         ev->cr.timeout_reason = params->timeout_reason;
1068
1069         spin_lock_irqsave(&wdev->event_lock, flags);
1070         list_add_tail(&ev->list, &wdev->event_list);
1071         spin_unlock_irqrestore(&wdev->event_lock, flags);
1072         queue_work(cfg80211_wq, &rdev->event_work);
1073 }
1074 EXPORT_SYMBOL(cfg80211_connect_done);
1075
1076 /* Consumes bss object one way or another */
1077 void __cfg80211_roamed(struct wireless_dev *wdev,
1078                        struct cfg80211_roam_info *info)
1079 {
1080 #ifdef CONFIG_CFG80211_WEXT
1081         union iwreq_data wrqu;
1082 #endif
1083         unsigned int link;
1084         const u8 *connected_addr;
1085
1086         lockdep_assert_wiphy(wdev->wiphy);
1087
1088         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1089                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1090                 goto out;
1091
1092         if (WARN_ON(!wdev->connected))
1093                 goto out;
1094
1095         if (info->valid_links) {
1096                 if (WARN_ON(!info->ap_mld_addr))
1097                         goto out;
1098
1099                 for_each_valid_link(info, link) {
1100                         if (WARN_ON(!info->links[link].addr))
1101                                 goto out;
1102                 }
1103         }
1104
1105         cfg80211_wdev_release_bsses(wdev);
1106
1107         for_each_valid_link(info, link) {
1108                 if (WARN_ON(!info->links[link].bss))
1109                         goto out;
1110         }
1111
1112         memset(wdev->links, 0, sizeof(wdev->links));
1113         wdev->valid_links = info->valid_links;
1114         for_each_valid_link(info, link) {
1115                 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1116                 wdev->links[link].client.current_bss =
1117                         bss_from_pub(info->links[link].bss);
1118         }
1119
1120         connected_addr = info->valid_links ?
1121                          info->ap_mld_addr :
1122                          info->links[0].bss->bssid;
1123         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1124         if (info->valid_links) {
1125                 for_each_valid_link(info, link)
1126                         memcpy(wdev->links[link].addr, info->links[link].addr,
1127                                ETH_ALEN);
1128         }
1129         wdev->unprot_beacon_reported = 0;
1130         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1131                             wdev->netdev, info, GFP_KERNEL);
1132
1133 #ifdef CONFIG_CFG80211_WEXT
1134         if (!info->valid_links) {
1135                 if (info->req_ie) {
1136                         memset(&wrqu, 0, sizeof(wrqu));
1137                         wrqu.data.length = info->req_ie_len;
1138                         wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1139                                             &wrqu, info->req_ie);
1140                 }
1141
1142                 if (info->resp_ie) {
1143                         memset(&wrqu, 0, sizeof(wrqu));
1144                         wrqu.data.length = info->resp_ie_len;
1145                         wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1146                                             &wrqu, info->resp_ie);
1147                 }
1148
1149                 memset(&wrqu, 0, sizeof(wrqu));
1150                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1151                 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1152                 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1153                 wdev->wext.prev_bssid_valid = true;
1154                 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1155         }
1156 #endif
1157
1158         return;
1159 out:
1160         for_each_valid_link(info, link)
1161                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1162 }
1163
1164 /* Consumes info->links.bss object(s) one way or another */
1165 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1166                      gfp_t gfp)
1167 {
1168         struct wireless_dev *wdev = dev->ieee80211_ptr;
1169         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1170         struct cfg80211_event *ev;
1171         unsigned long flags;
1172         u8 *next;
1173         unsigned int link;
1174         size_t link_info_size = 0;
1175         bool bss_not_found = false;
1176
1177         for_each_valid_link(info, link) {
1178                 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1179                 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1180
1181                 if (info->links[link].bss)
1182                         continue;
1183
1184                 info->links[link].bss =
1185                         cfg80211_get_bss(wdev->wiphy,
1186                                          info->links[link].channel,
1187                                          info->links[link].bssid,
1188                                          wdev->u.client.ssid,
1189                                          wdev->u.client.ssid_len,
1190                                          wdev->conn_bss_type,
1191                                          IEEE80211_PRIVACY_ANY);
1192
1193                 if (!info->links[link].bss) {
1194                         bss_not_found = true;
1195                         break;
1196                 }
1197         }
1198
1199         if (WARN_ON(bss_not_found))
1200                 goto out;
1201
1202         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1203                      info->fils.kek_len + info->fils.pmk_len +
1204                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1205                      (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1206         if (!ev)
1207                 goto out;
1208
1209         ev->type = EVENT_ROAMED;
1210         next = ((u8 *)ev) + sizeof(*ev);
1211         if (info->req_ie_len) {
1212                 ev->rm.req_ie = next;
1213                 ev->rm.req_ie_len = info->req_ie_len;
1214                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1215                 next += info->req_ie_len;
1216         }
1217         if (info->resp_ie_len) {
1218                 ev->rm.resp_ie = next;
1219                 ev->rm.resp_ie_len = info->resp_ie_len;
1220                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1221                        info->resp_ie_len);
1222                 next += info->resp_ie_len;
1223         }
1224         if (info->fils.kek_len) {
1225                 ev->rm.fils.kek = next;
1226                 ev->rm.fils.kek_len = info->fils.kek_len;
1227                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1228                        info->fils.kek_len);
1229                 next += info->fils.kek_len;
1230         }
1231         if (info->fils.pmk_len) {
1232                 ev->rm.fils.pmk = next;
1233                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1234                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1235                        info->fils.pmk_len);
1236                 next += info->fils.pmk_len;
1237         }
1238         if (info->fils.pmkid) {
1239                 ev->rm.fils.pmkid = next;
1240                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1241                        WLAN_PMKID_LEN);
1242                 next += WLAN_PMKID_LEN;
1243         }
1244         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1245         if (info->fils.update_erp_next_seq_num)
1246                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1247         if (info->ap_mld_addr) {
1248                 ev->rm.ap_mld_addr = next;
1249                 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1250                        ETH_ALEN);
1251                 next += ETH_ALEN;
1252         }
1253         ev->rm.valid_links = info->valid_links;
1254         for_each_valid_link(info, link) {
1255                 ev->rm.links[link].bss = info->links[link].bss;
1256
1257                 if (info->links[link].addr) {
1258                         ev->rm.links[link].addr = next;
1259                         memcpy((void *)ev->rm.links[link].addr,
1260                                info->links[link].addr,
1261                                ETH_ALEN);
1262                         next += ETH_ALEN;
1263                 }
1264
1265                 if (info->links[link].bssid) {
1266                         ev->rm.links[link].bssid = next;
1267                         memcpy((void *)ev->rm.links[link].bssid,
1268                                info->links[link].bssid,
1269                                ETH_ALEN);
1270                         next += ETH_ALEN;
1271                 }
1272         }
1273
1274         spin_lock_irqsave(&wdev->event_lock, flags);
1275         list_add_tail(&ev->list, &wdev->event_list);
1276         spin_unlock_irqrestore(&wdev->event_lock, flags);
1277         queue_work(cfg80211_wq, &rdev->event_work);
1278
1279         return;
1280 out:
1281         for_each_valid_link(info, link)
1282                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1283
1284 }
1285 EXPORT_SYMBOL(cfg80211_roamed);
1286
1287 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1288                                         const u8 *td_bitmap, u8 td_bitmap_len)
1289 {
1290         lockdep_assert_wiphy(wdev->wiphy);
1291
1292         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1293                 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1294                 wdev->iftype != NL80211_IFTYPE_AP &&
1295                 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1296                 return;
1297
1298         if (wdev->iftype == NL80211_IFTYPE_STATION ||
1299                 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1300                 if (WARN_ON(!wdev->connected) ||
1301                         WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1302                         return;
1303         }
1304
1305         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1306                                      peer_addr, td_bitmap, td_bitmap_len);
1307 }
1308
1309 void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1310                               const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1311 {
1312         struct wireless_dev *wdev = dev->ieee80211_ptr;
1313         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1314         struct cfg80211_event *ev;
1315         unsigned long flags;
1316
1317         if (WARN_ON(!peer_addr))
1318                 return;
1319
1320         ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1321         if (!ev)
1322                 return;
1323
1324         ev->type = EVENT_PORT_AUTHORIZED;
1325         memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1326         ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1327         ev->pa.td_bitmap_len = td_bitmap_len;
1328         memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1329
1330         /*
1331          * Use the wdev event list so that if there are pending
1332          * connected/roamed events, they will be reported first.
1333          */
1334         spin_lock_irqsave(&wdev->event_lock, flags);
1335         list_add_tail(&ev->list, &wdev->event_list);
1336         spin_unlock_irqrestore(&wdev->event_lock, flags);
1337         queue_work(cfg80211_wq, &rdev->event_work);
1338 }
1339 EXPORT_SYMBOL(cfg80211_port_authorized);
1340
1341 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1342                              size_t ie_len, u16 reason, bool from_ap)
1343 {
1344         struct wireless_dev *wdev = dev->ieee80211_ptr;
1345         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1346         int i;
1347 #ifdef CONFIG_CFG80211_WEXT
1348         union iwreq_data wrqu;
1349 #endif
1350
1351         lockdep_assert_wiphy(wdev->wiphy);
1352
1353         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1354                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1355                 return;
1356
1357         cfg80211_wdev_release_bsses(wdev);
1358         wdev->valid_links = 0;
1359         wdev->connected = false;
1360         wdev->u.client.ssid_len = 0;
1361         wdev->conn_owner_nlportid = 0;
1362         kfree_sensitive(wdev->connect_keys);
1363         wdev->connect_keys = NULL;
1364
1365         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1366
1367         /* stop critical protocol if supported */
1368         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1369                 rdev->crit_proto_nlportid = 0;
1370                 rdev_crit_proto_stop(rdev, wdev);
1371         }
1372
1373         /*
1374          * Delete all the keys ... pairwise keys can't really
1375          * exist any more anyway, but default keys might.
1376          */
1377         if (rdev->ops->del_key) {
1378                 int max_key_idx = 5;
1379
1380                 if (wiphy_ext_feature_isset(
1381                             wdev->wiphy,
1382                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1383                     wiphy_ext_feature_isset(
1384                             wdev->wiphy,
1385                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1386                         max_key_idx = 7;
1387                 for (i = 0; i <= max_key_idx; i++)
1388                         rdev_del_key(rdev, dev, -1, i, false, NULL);
1389         }
1390
1391         rdev_set_qos_map(rdev, dev, NULL);
1392
1393 #ifdef CONFIG_CFG80211_WEXT
1394         memset(&wrqu, 0, sizeof(wrqu));
1395         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1396         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1397         wdev->wext.connect.ssid_len = 0;
1398 #endif
1399
1400         schedule_work(&cfg80211_disconnect_work);
1401
1402         cfg80211_schedule_channels_check(wdev);
1403 }
1404
1405 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1406                            const u8 *ie, size_t ie_len,
1407                            bool locally_generated, gfp_t gfp)
1408 {
1409         struct wireless_dev *wdev = dev->ieee80211_ptr;
1410         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1411         struct cfg80211_event *ev;
1412         unsigned long flags;
1413
1414         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1415         if (!ev)
1416                 return;
1417
1418         ev->type = EVENT_DISCONNECTED;
1419         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1420         ev->dc.ie_len = ie_len;
1421         memcpy((void *)ev->dc.ie, ie, ie_len);
1422         ev->dc.reason = reason;
1423         ev->dc.locally_generated = locally_generated;
1424
1425         spin_lock_irqsave(&wdev->event_lock, flags);
1426         list_add_tail(&ev->list, &wdev->event_list);
1427         spin_unlock_irqrestore(&wdev->event_lock, flags);
1428         queue_work(cfg80211_wq, &rdev->event_work);
1429 }
1430 EXPORT_SYMBOL(cfg80211_disconnected);
1431
1432 /*
1433  * API calls for nl80211/wext compatibility code
1434  */
1435 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1436                      struct net_device *dev,
1437                      struct cfg80211_connect_params *connect,
1438                      struct cfg80211_cached_keys *connkeys,
1439                      const u8 *prev_bssid)
1440 {
1441         struct wireless_dev *wdev = dev->ieee80211_ptr;
1442         int err;
1443
1444         lockdep_assert_wiphy(wdev->wiphy);
1445
1446         /*
1447          * If we have an ssid_len, we're trying to connect or are
1448          * already connected, so reject a new SSID unless it's the
1449          * same (which is the case for re-association.)
1450          */
1451         if (wdev->u.client.ssid_len &&
1452             (wdev->u.client.ssid_len != connect->ssid_len ||
1453              memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1454                 return -EALREADY;
1455
1456         /*
1457          * If connected, reject (re-)association unless prev_bssid
1458          * matches the current BSSID.
1459          */
1460         if (wdev->connected) {
1461                 if (!prev_bssid)
1462                         return -EALREADY;
1463                 if (!ether_addr_equal(prev_bssid,
1464                                       wdev->u.client.connected_addr))
1465                         return -ENOTCONN;
1466         }
1467
1468         /*
1469          * Reject if we're in the process of connecting with WEP,
1470          * this case isn't very interesting and trying to handle
1471          * it would make the code much more complex.
1472          */
1473         if (wdev->connect_keys)
1474                 return -EINPROGRESS;
1475
1476         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1477                                   rdev->wiphy.ht_capa_mod_mask);
1478         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1479                                    rdev->wiphy.vht_capa_mod_mask);
1480
1481         if (connkeys && connkeys->def >= 0) {
1482                 int idx;
1483                 u32 cipher;
1484
1485                 idx = connkeys->def;
1486                 cipher = connkeys->params[idx].cipher;
1487                 /* If given a WEP key we may need it for shared key auth */
1488                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1489                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1490                         connect->key_idx = idx;
1491                         connect->key = connkeys->params[idx].key;
1492                         connect->key_len = connkeys->params[idx].key_len;
1493
1494                         /*
1495                          * If ciphers are not set (e.g. when going through
1496                          * iwconfig), we have to set them appropriately here.
1497                          */
1498                         if (connect->crypto.cipher_group == 0)
1499                                 connect->crypto.cipher_group = cipher;
1500
1501                         if (connect->crypto.n_ciphers_pairwise == 0) {
1502                                 connect->crypto.n_ciphers_pairwise = 1;
1503                                 connect->crypto.ciphers_pairwise[0] = cipher;
1504                         }
1505                 }
1506         } else {
1507                 if (WARN_ON(connkeys))
1508                         return -EINVAL;
1509
1510                 /* connect can point to wdev->wext.connect which
1511                  * can hold key data from a previous connection
1512                  */
1513                 connect->key = NULL;
1514                 connect->key_len = 0;
1515                 connect->key_idx = 0;
1516         }
1517
1518         wdev->connect_keys = connkeys;
1519         memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1520         wdev->u.client.ssid_len = connect->ssid_len;
1521
1522         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1523                                               IEEE80211_BSS_TYPE_ESS;
1524
1525         if (!rdev->ops->connect)
1526                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1527         else
1528                 err = rdev_connect(rdev, dev, connect);
1529
1530         if (err) {
1531                 wdev->connect_keys = NULL;
1532                 /*
1533                  * This could be reassoc getting refused, don't clear
1534                  * ssid_len in that case.
1535                  */
1536                 if (!wdev->connected)
1537                         wdev->u.client.ssid_len = 0;
1538                 return err;
1539         }
1540
1541         return 0;
1542 }
1543
1544 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1545                         struct net_device *dev, u16 reason, bool wextev)
1546 {
1547         struct wireless_dev *wdev = dev->ieee80211_ptr;
1548         int err = 0;
1549
1550         lockdep_assert_wiphy(wdev->wiphy);
1551
1552         kfree_sensitive(wdev->connect_keys);
1553         wdev->connect_keys = NULL;
1554
1555         wdev->conn_owner_nlportid = 0;
1556
1557         if (wdev->conn)
1558                 err = cfg80211_sme_disconnect(wdev, reason);
1559         else if (!rdev->ops->disconnect)
1560                 cfg80211_mlme_down(rdev, dev);
1561         else if (wdev->u.client.ssid_len)
1562                 err = rdev_disconnect(rdev, dev, reason);
1563
1564         /*
1565          * Clear ssid_len unless we actually were fully connected,
1566          * in which case cfg80211_disconnected() will take care of
1567          * this later.
1568          */
1569         if (!wdev->connected)
1570                 wdev->u.client.ssid_len = 0;
1571
1572         return err;
1573 }
1574
1575 /*
1576  * Used to clean up after the connection / connection attempt owner socket
1577  * disconnects
1578  */
1579 void cfg80211_autodisconnect_wk(struct work_struct *work)
1580 {
1581         struct wireless_dev *wdev =
1582                 container_of(work, struct wireless_dev, disconnect_wk);
1583         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1584
1585         wiphy_lock(wdev->wiphy);
1586
1587         if (wdev->conn_owner_nlportid) {
1588                 switch (wdev->iftype) {
1589                 case NL80211_IFTYPE_ADHOC:
1590                         cfg80211_leave_ibss(rdev, wdev->netdev, false);
1591                         break;
1592                 case NL80211_IFTYPE_AP:
1593                 case NL80211_IFTYPE_P2P_GO:
1594                         cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1595                         break;
1596                 case NL80211_IFTYPE_MESH_POINT:
1597                         cfg80211_leave_mesh(rdev, wdev->netdev);
1598                         break;
1599                 case NL80211_IFTYPE_STATION:
1600                 case NL80211_IFTYPE_P2P_CLIENT:
1601                         /*
1602                          * Use disconnect_bssid if still connecting and
1603                          * ops->disconnect not implemented.  Otherwise we can
1604                          * use cfg80211_disconnect.
1605                          */
1606                         if (rdev->ops->disconnect || wdev->connected)
1607                                 cfg80211_disconnect(rdev, wdev->netdev,
1608                                                     WLAN_REASON_DEAUTH_LEAVING,
1609                                                     true);
1610                         else
1611                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1612                                                      wdev->disconnect_bssid,
1613                                                      NULL, 0,
1614                                                      WLAN_REASON_DEAUTH_LEAVING,
1615                                                      false);
1616                         break;
1617                 default:
1618                         break;
1619                 }
1620         }
1621
1622         wiphy_unlock(wdev->wiphy);
1623 }