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         request->n_channels = n_channels;
  87         if (wdev->conn->params.channel) {
  88                 enum nl80211_band band = wdev->conn->params.channel->band;
  89                 struct ieee80211_supported_band *sband =
  90                         wdev->wiphy->bands[band];
  91
  92                 if (!sband) {
  93                         kfree(request);
  94                         return -EINVAL;
  95                 }
  96                 request->channels[0] = wdev->conn->params.channel;
  97                 request->rates[band] = (1 << sband->n_bitrates) - 1;
  98         } else {
  99                 int i = 0, j;
 100                 enum nl80211_band band;
 101                 struct ieee80211_supported_band *bands;
 102                 struct ieee80211_channel *channel;
 103
 104                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
 105                         bands = wdev->wiphy->bands[band];
 106                         if (!bands)
 107                                 continue;
 108                         for (j = 0; j < bands->n_channels; j++) {
 109                                 channel = &bands->channels[j];
 110                                 if (channel->flags & IEEE80211_CHAN_DISABLED)
 111                                         continue;
 112                                 request->channels[i++] = channel;
 113                         }
 114                         request->rates[band] = (1 << bands->n_bitrates) - 1;
 115                 }
 116                 n_channels = i;
 117         }
 118         request->n_channels = n_channels;
 119         request->ssids = (void *)request +
 120                 struct_size(request, channels, n_channels);
 121         request->n_ssids = 1;
 122
 123         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 124                 wdev->conn->params.ssid_len);
 125         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 126
 127         eth_broadcast_addr(request->bssid);
 128
 129         request->wdev = wdev;
 130         request->wiphy = &rdev->wiphy;
 131         request->scan_start = jiffies;
 132
 133         rdev->scan_req = request;
 134
 135         err = cfg80211_scan(rdev);
 136         if (!err) {
 137                 wdev->conn->state = CFG80211_CONN_SCANNING;
 138                 nl80211_send_scan_start(rdev, wdev);
 139                 dev_hold(wdev->netdev);
 140         } else {
 141                 rdev->scan_req = NULL;
 142                 kfree(request);
 143         }
 144         return err;
 145 }
 146
 147 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 148                                  enum nl80211_timeout_reason *treason)
 149 {
 150         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 151         struct cfg80211_connect_params *params;
 152         struct cfg80211_auth_request auth_req = {};
 153         struct cfg80211_assoc_request req = {};
 154         int err;
 155
 156         lockdep_assert_wiphy(wdev->wiphy);
 157
 158         if (!wdev->conn)
 159                 return 0;
 160
 161         params = &wdev->conn->params;
 162
 163         switch (wdev->conn->state) {
 164         case CFG80211_CONN_SCANNING:
 165                 /* didn't find it during scan ... */
 166                 return -ENOENT;
 167         case CFG80211_CONN_SCAN_AGAIN:
 168                 return cfg80211_conn_scan(wdev);
 169         case CFG80211_CONN_AUTHENTICATE_NEXT:
 170                 if (WARN_ON(!rdev->ops->auth))
 171                         return -EOPNOTSUPP;
 172                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 173                 auth_req.key = params->key;
 174                 auth_req.key_len = params->key_len;
 175                 auth_req.key_idx = params->key_idx;
 176                 auth_req.auth_type = params->auth_type;
 177                 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 178                                                 params->bssid,
 179                                                 params->ssid, params->ssid_len,
 180                                                 IEEE80211_BSS_TYPE_ESS,
 181                                                 IEEE80211_PRIVACY_ANY);
 182                 auth_req.link_id = -1;
 183                 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
 184                 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
 185                 return err;
 186         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 187                 *treason = NL80211_TIMEOUT_AUTH;
 188                 return -ENOTCONN;
 189         case CFG80211_CONN_ASSOCIATE_NEXT:
 190                 if (WARN_ON(!rdev->ops->assoc))
 191                         return -EOPNOTSUPP;
 192                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 193                 if (wdev->conn->prev_bssid_valid)
 194                         req.prev_bssid = wdev->conn->prev_bssid;
 195                 req.ie = params->ie;
 196                 req.ie_len = params->ie_len;
 197                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 198                 req.crypto = params->crypto;
 199                 req.flags = params->flags;
 200                 req.ht_capa = params->ht_capa;
 201                 req.ht_capa_mask = params->ht_capa_mask;
 202                 req.vht_capa = params->vht_capa;
 203                 req.vht_capa_mask = params->vht_capa_mask;
 204                 req.link_id = -1;
 205
 206                 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 207                                            params->bssid,
 208                                            params->ssid, params->ssid_len,
 209                                            IEEE80211_BSS_TYPE_ESS,
 210                                            IEEE80211_PRIVACY_ANY);
 211                 if (!req.bss) {
 212                         err = -ENOENT;
 213                 } else {
 214                         err = cfg80211_mlme_assoc(rdev, wdev->netdev,
 215                                                   &req, NULL);
 216                         cfg80211_put_bss(&rdev->wiphy, req.bss);
 217                 }
 218
 219                 if (err)
 220                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 221                                              NULL, 0,
 222                                              WLAN_REASON_DEAUTH_LEAVING,
 223                                              false);
 224                 return err;
 225         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 226                 *treason = NL80211_TIMEOUT_ASSOC;
 227                 fallthrough;
 228         case CFG80211_CONN_ASSOC_FAILED:
 229                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 230                                      NULL, 0,
 231                                      WLAN_REASON_DEAUTH_LEAVING, false);
 232                 return -ENOTCONN;
 233         case CFG80211_CONN_DEAUTH:
 234                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 235                                      NULL, 0,
 236                                      WLAN_REASON_DEAUTH_LEAVING, false);
 237                 fallthrough;
 238         case CFG80211_CONN_ABANDON:
 239                 /* free directly, disconnected event already sent */
 240                 cfg80211_sme_free(wdev);
 241                 return 0;
 242         default:
 243                 return 0;
 244         }
 245 }
 246
 247 void cfg80211_conn_work(struct work_struct *work)
 248 {
 249         struct cfg80211_registered_device *rdev =
 250                 container_of(work, struct cfg80211_registered_device, conn_work);
 251         struct wireless_dev *wdev;
 252         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 253         enum nl80211_timeout_reason treason;
 254
 255         guard(wiphy)(&rdev->wiphy);
 256
 257         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 258                 if (!wdev->netdev)
 259                         continue;
 260
 261                 if (!netif_running(wdev->netdev))
 262                         continue;
 263
 264                 if (!wdev->conn ||
 265                     wdev->conn->state == CFG80211_CONN_CONNECTED)
 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         }
 283 }
 284
 285 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
 286                                     struct cfg80211_bss *bss)
 287 {
 288         memcpy(conn->bssid, bss->bssid, ETH_ALEN);
 289         conn->params.bssid = conn->bssid;
 290         conn->params.channel = bss->channel;
 291         conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 292 }
 293
 294 /* Returned bss is reference counted and must be cleaned up appropriately. */
 295 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 296 {
 297         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 298         struct cfg80211_bss *bss;
 299
 300         lockdep_assert_wiphy(wdev->wiphy);
 301
 302         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 303                                wdev->conn->params.bssid,
 304                                wdev->conn->params.ssid,
 305                                wdev->conn->params.ssid_len,
 306                                wdev->conn_bss_type,
 307                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 308         if (!bss)
 309                 return NULL;
 310
 311         cfg80211_step_auth_next(wdev->conn, bss);
 312         schedule_work(&rdev->conn_work);
 313
 314         return bss;
 315 }
 316
 317 void cfg80211_sme_scan_done(struct net_device *dev)
 318 {
 319         struct wireless_dev *wdev = dev->ieee80211_ptr;
 320         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 321         struct cfg80211_bss *bss;
 322
 323         lockdep_assert_wiphy(wdev->wiphy);
 324
 325         if (!wdev->conn)
 326                 return;
 327
 328         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 329             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 330                 return;
 331
 332         bss = cfg80211_get_conn_bss(wdev);
 333         if (bss)
 334                 cfg80211_put_bss(&rdev->wiphy, bss);
 335         else
 336                 schedule_work(&rdev->conn_work);
 337 }
 338
 339 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 340 {
 341         struct wiphy *wiphy = wdev->wiphy;
 342         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 343         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 344         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 345
 346         lockdep_assert_wiphy(wdev->wiphy);
 347
 348         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 349                 return;
 350
 351         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 352             wdev->conn->auto_auth &&
 353             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 354                 /* select automatically between only open, shared, leap */
 355                 switch (wdev->conn->params.auth_type) {
 356                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 357                         if (wdev->connect_keys)
 358                                 wdev->conn->params.auth_type =
 359                                         NL80211_AUTHTYPE_SHARED_KEY;
 360                         else
 361                                 wdev->conn->params.auth_type =
 362                                         NL80211_AUTHTYPE_NETWORK_EAP;
 363                         break;
 364                 case NL80211_AUTHTYPE_SHARED_KEY:
 365                         wdev->conn->params.auth_type =
 366                                 NL80211_AUTHTYPE_NETWORK_EAP;
 367                         break;
 368                 default:
 369                         /* huh? */
 370                         wdev->conn->params.auth_type =
 371                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 372                         break;
 373                 }
 374                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 375                 schedule_work(&rdev->conn_work);
 376         } else if (status_code != WLAN_STATUS_SUCCESS) {
 377                 struct cfg80211_connect_resp_params cr;
 378
 379                 memset(&cr, 0, sizeof(cr));
 380                 cr.status = status_code;
 381                 cr.links[0].bssid = mgmt->bssid;
 382                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 383                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 384         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 385                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 386                 schedule_work(&rdev->conn_work);
 387         }
 388 }
 389
 390 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 391 {
 392         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 393
 394         if (!wdev->conn)
 395                 return false;
 396
 397         if (status == WLAN_STATUS_SUCCESS) {
 398                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 399                 return false;
 400         }
 401
 402         if (wdev->conn->prev_bssid_valid) {
 403                 /*
 404                  * Some stupid APs don't accept reassoc, so we
 405                  * need to fall back to trying regular assoc;
 406                  * return true so no event is sent to userspace.
 407                  */
 408                 wdev->conn->prev_bssid_valid = false;
 409                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 410                 schedule_work(&rdev->conn_work);
 411                 return true;
 412         }
 413
 414         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 415         schedule_work(&rdev->conn_work);
 416         return false;
 417 }
 418
 419 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 420 {
 421         cfg80211_sme_free(wdev);
 422 }
 423
 424 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 425 {
 426         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 427
 428         if (!wdev->conn)
 429                 return;
 430
 431         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 432         schedule_work(&rdev->conn_work);
 433 }
 434
 435 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 436 {
 437         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 438
 439         if (!wdev->conn)
 440                 return;
 441
 442         wdev->conn->state = CFG80211_CONN_DEAUTH;
 443         schedule_work(&rdev->conn_work);
 444 }
 445
 446 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 447 {
 448         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 449
 450         if (!wdev->conn)
 451                 return;
 452
 453         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 454         schedule_work(&rdev->conn_work);
 455 }
 456
 457 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 458 {
 459         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 460
 461         if (!wdev->conn)
 462                 return;
 463
 464         wdev->conn->state = CFG80211_CONN_ABANDON;
 465         schedule_work(&rdev->conn_work);
 466 }
 467
 468 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
 469 {
 470         unsigned int link;
 471
 472         for_each_valid_link(wdev, link) {
 473                 if (!wdev->links[link].client.current_bss)
 474                         continue;
 475                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 476                 cfg80211_put_bss(wdev->wiphy,
 477                                  &wdev->links[link].client.current_bss->pub);
 478                 wdev->links[link].client.current_bss = NULL;
 479         }
 480 }
 481
 482 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
 483 {
 484         unsigned int link;
 485
 486         for_each_valid_link(wdev, link) {
 487                 if (!wdev->links[link].client.current_bss ||
 488                     !(link_mask & BIT(link)))
 489                         continue;
 490                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 491                 cfg80211_put_bss(wdev->wiphy,
 492                                  &wdev->links[link].client.current_bss->pub);
 493                 wdev->links[link].client.current_bss = NULL;
 494         }
 495 }
 496
 497 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 498                                      const u8 *ies, size_t ies_len,
 499                                      const u8 **out_ies, size_t *out_ies_len)
 500 {
 501         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 502         u8 *buf;
 503         size_t offs;
 504
 505         if (!rdev->wiphy.extended_capabilities_len ||
 506             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 507                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 508                 if (!*out_ies)
 509                         return -ENOMEM;
 510                 *out_ies_len = ies_len;
 511                 return 0;
 512         }
 513
 514         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 515                       GFP_KERNEL);
 516         if (!buf)
 517                 return -ENOMEM;
 518
 519         if (ies_len) {
 520                 static const u8 before_extcapa[] = {
 521                         /* not listing IEs expected to be created by driver */
 522                         WLAN_EID_RSN,
 523                         WLAN_EID_QOS_CAPA,
 524                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 525                         WLAN_EID_MOBILITY_DOMAIN,
 526                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 527                         WLAN_EID_BSS_COEX_2040,
 528                 };
 529
 530                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 531                                           ARRAY_SIZE(before_extcapa), 0);
 532                 memcpy(buf, ies, offs);
 533                 /* leave a whole for extended capabilities IE */
 534                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 535                        ies + offs, ies_len - offs);
 536         } else {
 537                 offs = 0;
 538         }
 539
 540         /* place extended capabilities IE (with only driver capabilities) */
 541         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 542         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 543         memcpy(buf + offs + 2,
 544                rdev->wiphy.extended_capabilities,
 545                rdev->wiphy.extended_capabilities_len);
 546
 547         *out_ies = buf;
 548         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 549
 550         return 0;
 551 }
 552
 553 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 554                                 struct cfg80211_connect_params *connect,
 555                                 const u8 *prev_bssid)
 556 {
 557         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 558         struct cfg80211_bss *bss;
 559         int err;
 560
 561         if (!rdev->ops->auth || !rdev->ops->assoc)
 562                 return -EOPNOTSUPP;
 563
 564         cfg80211_wdev_release_bsses(wdev);
 565
 566         if (wdev->connected) {
 567                 cfg80211_sme_free(wdev);
 568                 wdev->connected = false;
 569         }
 570
 571         if (wdev->conn)
 572                 return -EINPROGRESS;
 573
 574         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 575         if (!wdev->conn)
 576                 return -ENOMEM;
 577
 578         /*
 579          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 580          */
 581         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 582         if (connect->bssid) {
 583                 wdev->conn->params.bssid = wdev->conn->bssid;
 584                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 585         }
 586
 587         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 588                                       &wdev->conn->ie,
 589                                       &wdev->conn->params.ie_len)) {
 590                 kfree(wdev->conn);
 591                 wdev->conn = NULL;
 592                 return -ENOMEM;
 593         }
 594         wdev->conn->params.ie = wdev->conn->ie;
 595
 596         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 597                 wdev->conn->auto_auth = true;
 598                 /* start with open system ... should mostly work */
 599                 wdev->conn->params.auth_type =
 600                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 601         } else {
 602                 wdev->conn->auto_auth = false;
 603         }
 604
 605         wdev->conn->params.ssid = wdev->u.client.ssid;
 606         wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
 607
 608         /* see if we have the bss already */
 609         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 610                                wdev->conn->params.bssid,
 611                                wdev->conn->params.ssid,
 612                                wdev->conn->params.ssid_len,
 613                                wdev->conn_bss_type,
 614                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 615
 616         if (prev_bssid) {
 617                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 618                 wdev->conn->prev_bssid_valid = true;
 619         }
 620
 621         /* we're good if we have a matching bss struct */
 622         if (bss) {
 623                 enum nl80211_timeout_reason treason;
 624
 625                 cfg80211_step_auth_next(wdev->conn, bss);
 626                 err = cfg80211_conn_do_work(wdev, &treason);
 627                 cfg80211_put_bss(wdev->wiphy, bss);
 628         } else {
 629                 /* otherwise we'll need to scan for the AP first */
 630                 err = cfg80211_conn_scan(wdev);
 631
 632                 /*
 633                  * If we can't scan right now, then we need to scan again
 634                  * after the current scan finished, since the parameters
 635                  * changed (unless we find a good AP anyway).
 636                  */
 637                 if (err == -EBUSY) {
 638                         err = 0;
 639                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 640                 }
 641         }
 642
 643         if (err)
 644                 cfg80211_sme_free(wdev);
 645
 646         return err;
 647 }
 648
 649 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 650 {
 651         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 652         int err;
 653
 654         if (!wdev->conn)
 655                 return 0;
 656
 657         if (!rdev->ops->deauth)
 658                 return -EOPNOTSUPP;
 659
 660         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 661             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 662                 err = 0;
 663                 goto out;
 664         }
 665
 666         /* wdev->conn->params.bssid must be set if > SCANNING */
 667         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 668                                    wdev->conn->params.bssid,
 669                                    NULL, 0, reason, false);
 670  out:
 671         cfg80211_sme_free(wdev);
 672         return err;
 673 }
 674
 675 /*
 676  * code shared for in-device and software SME
 677  */
 678
 679 static bool cfg80211_is_all_idle(void)
 680 {
 681         struct cfg80211_registered_device *rdev;
 682         struct wireless_dev *wdev;
 683         bool is_all_idle = true;
 684
 685         /*
 686          * All devices must be idle as otherwise if you are actively
 687          * scanning some new beacon hints could be learned and would
 688          * count as new regulatory hints.
 689          * Also if there is any other active beaconing interface we
 690          * need not issue a disconnect hint and reset any info such
 691          * as chan dfs state, etc.
 692          */
 693         for_each_rdev(rdev) {
 694                 guard(wiphy)(&rdev->wiphy);
 695
 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         }
 702
 703         return is_all_idle;
 704 }
 705
 706 static void disconnect_work(struct work_struct *work)
 707 {
 708         rtnl_lock();
 709         if (cfg80211_is_all_idle())
 710                 regulatory_hint_disconnect();
 711         rtnl_unlock();
 712 }
 713
 714 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 715
 716 static void
 717 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
 718                                       struct cfg80211_connect_resp_params *cr)
 719 {
 720         unsigned int link;
 721
 722         for_each_valid_link(cr, link) {
 723                 if (!cr->links[link].bss)
 724                         continue;
 725                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 726                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 727         }
 728 }
 729
 730 /*
 731  * API calls for drivers implementing connect/disconnect and
 732  * SME event handling
 733  */
 734
 735 /* This method must consume bss one way or another */
 736 void __cfg80211_connect_result(struct net_device *dev,
 737                                struct cfg80211_connect_resp_params *cr,
 738                                bool wextev)
 739 {
 740         struct wireless_dev *wdev = dev->ieee80211_ptr;
 741         const struct element *country_elem = NULL;
 742         const struct element *ssid;
 743         const u8 *country_data;
 744         u8 country_datalen;
 745 #ifdef CONFIG_CFG80211_WEXT
 746         union iwreq_data wrqu;
 747 #endif
 748         unsigned int link;
 749         const u8 *connected_addr;
 750         bool bss_not_found = false;
 751
 752         lockdep_assert_wiphy(wdev->wiphy);
 753
 754         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 755                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 756                 goto out;
 757
 758         if (cr->valid_links) {
 759                 if (WARN_ON(!cr->ap_mld_addr))
 760                         goto out;
 761
 762                 for_each_valid_link(cr, link) {
 763                         if (WARN_ON(!cr->links[link].addr))
 764                                 goto out;
 765                 }
 766
 767                 if (WARN_ON(wdev->connect_keys))
 768                         goto out;
 769         }
 770
 771         wdev->unprot_beacon_reported = 0;
 772         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 773                                     GFP_KERNEL);
 774         connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
 775
 776 #ifdef CONFIG_CFG80211_WEXT
 777         if (wextev && !cr->valid_links) {
 778                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 779                         memset(&wrqu, 0, sizeof(wrqu));
 780                         wrqu.data.length = cr->req_ie_len;
 781                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 782                                             cr->req_ie);
 783                 }
 784
 785                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 786                         memset(&wrqu, 0, sizeof(wrqu));
 787                         wrqu.data.length = cr->resp_ie_len;
 788                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 789                                             cr->resp_ie);
 790                 }
 791
 792                 memset(&wrqu, 0, sizeof(wrqu));
 793                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 794                 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
 795                         memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
 796                         memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
 797                         wdev->wext.prev_bssid_valid = true;
 798                 }
 799                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 800         }
 801 #endif
 802
 803         if (cr->status == WLAN_STATUS_SUCCESS) {
 804                 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
 805                         for_each_valid_link(cr, link) {
 806                                 if (WARN_ON_ONCE(!cr->links[link].bss))
 807                                         break;
 808                         }
 809                 }
 810
 811                 for_each_valid_link(cr, link) {
 812                         /* don't do extra lookups for failures */
 813                         if (cr->links[link].status != WLAN_STATUS_SUCCESS)
 814                                 continue;
 815
 816                         if (cr->links[link].bss)
 817                                 continue;
 818
 819                         cr->links[link].bss =
 820                                 cfg80211_get_bss(wdev->wiphy, NULL,
 821                                                  cr->links[link].bssid,
 822                                                  wdev->u.client.ssid,
 823                                                  wdev->u.client.ssid_len,
 824                                                  wdev->conn_bss_type,
 825                                                  IEEE80211_PRIVACY_ANY);
 826                         if (!cr->links[link].bss) {
 827                                 bss_not_found = true;
 828                                 break;
 829                         }
 830                         cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
 831                 }
 832         }
 833
 834         cfg80211_wdev_release_bsses(wdev);
 835
 836         if (cr->status != WLAN_STATUS_SUCCESS) {
 837                 kfree_sensitive(wdev->connect_keys);
 838                 wdev->connect_keys = NULL;
 839                 wdev->u.client.ssid_len = 0;
 840                 wdev->conn_owner_nlportid = 0;
 841                 cfg80211_connect_result_release_bsses(wdev, cr);
 842                 cfg80211_sme_free(wdev);
 843                 return;
 844         }
 845
 846         if (WARN_ON(bss_not_found)) {
 847                 cfg80211_connect_result_release_bsses(wdev, cr);
 848                 return;
 849         }
 850
 851         memset(wdev->links, 0, sizeof(wdev->links));
 852         for_each_valid_link(cr, link) {
 853                 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
 854                         continue;
 855                 cr->valid_links &= ~BIT(link);
 856                 /* don't require bss pointer for failed links */
 857                 if (!cr->links[link].bss)
 858                         continue;
 859                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 860                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 861         }
 862         wdev->valid_links = cr->valid_links;
 863         for_each_valid_link(cr, link)
 864                 wdev->links[link].client.current_bss =
 865                         bss_from_pub(cr->links[link].bss);
 866         wdev->connected = true;
 867         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
 868         if (cr->valid_links) {
 869                 for_each_valid_link(cr, link)
 870                         memcpy(wdev->links[link].addr, cr->links[link].addr,
 871                                ETH_ALEN);
 872         }
 873
 874         cfg80211_upload_connect_keys(wdev);
 875
 876         rcu_read_lock();
 877         for_each_valid_link(cr, link) {
 878                 country_elem =
 879                         ieee80211_bss_get_elem(cr->links[link].bss,
 880                                                WLAN_EID_COUNTRY);
 881                 if (country_elem)
 882                         break;
 883         }
 884         if (!country_elem) {
 885                 rcu_read_unlock();
 886                 return;
 887         }
 888
 889         country_datalen = country_elem->datalen;
 890         country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
 891         rcu_read_unlock();
 892
 893         if (!country_data)
 894                 return;
 895
 896         regulatory_hint_country_ie(wdev->wiphy,
 897                                    cr->links[link].bss->channel->band,
 898                                    country_data, country_datalen);
 899         kfree(country_data);
 900
 901         if (!wdev->u.client.ssid_len) {
 902                 rcu_read_lock();
 903                 for_each_valid_link(cr, link) {
 904                         ssid = ieee80211_bss_get_elem(cr->links[link].bss,
 905                                                       WLAN_EID_SSID);
 906
 907                         if (!ssid || !ssid->datalen)
 908                                 continue;
 909
 910                         memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
 911                         wdev->u.client.ssid_len = ssid->datalen;
 912                         break;
 913                 }
 914                 rcu_read_unlock();
 915         }
 916
 917         return;
 918 out:
 919         for_each_valid_link(cr, link)
 920                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 921 }
 922
 923 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
 924                                      struct cfg80211_bss **bss)
 925 {
 926         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 927         struct cfg80211_internal_bss *ibss;
 928
 929         if (!*bss)
 930                 return;
 931
 932         ibss = bss_from_pub(*bss);
 933         if (list_empty(&ibss->list)) {
 934                 struct cfg80211_bss *found = NULL, *tmp = *bss;
 935
 936                 found = cfg80211_get_bss(wdev->wiphy, NULL,
 937                                          (*bss)->bssid,
 938                                          wdev->u.client.ssid,
 939                                          wdev->u.client.ssid_len,
 940                                          wdev->conn_bss_type,
 941                                          IEEE80211_PRIVACY_ANY);
 942                 if (found) {
 943                         /* The same BSS is already updated so use it
 944                          * instead, as it has latest info.
 945                          */
 946                         *bss = found;
 947                 } else {
 948                         /* Update with BSS provided by driver, it will
 949                          * be freshly added and ref cnted, we can free
 950                          * the old one.
 951                          *
 952                          * signal_valid can be false, as we are not
 953                          * expecting the BSS to be found.
 954                          *
 955                          * keep the old timestamp to avoid confusion
 956                          */
 957                         cfg80211_bss_update(rdev, ibss, false,
 958                                             ibss->ts);
 959                 }
 960
 961                 cfg80211_put_bss(wdev->wiphy, tmp);
 962         }
 963 }
 964
 965 /* Consumes bss object(s) one way or another */
 966 void cfg80211_connect_done(struct net_device *dev,
 967                            struct cfg80211_connect_resp_params *params,
 968                            gfp_t gfp)
 969 {
 970         struct wireless_dev *wdev = dev->ieee80211_ptr;
 971         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 972         struct cfg80211_event *ev;
 973         unsigned long flags;
 974         u8 *next;
 975         size_t link_info_size = 0;
 976         unsigned int link;
 977
 978         for_each_valid_link(params, link) {
 979                 cfg80211_update_link_bss(wdev, &params->links[link].bss);
 980                 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
 981                 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
 982         }
 983
 984         ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
 985                      params->req_ie_len + params->resp_ie_len +
 986                      params->fils.kek_len + params->fils.pmk_len +
 987                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
 988                      gfp);
 989
 990         if (!ev) {
 991                 for_each_valid_link(params, link)
 992                         cfg80211_put_bss(wdev->wiphy,
 993                                          params->links[link].bss);
 994                 return;
 995         }
 996
 997         ev->type = EVENT_CONNECT_RESULT;
 998         next = ((u8 *)ev) + sizeof(*ev);
 999         if (params->ap_mld_addr) {
1000                 ev->cr.ap_mld_addr = next;
1001                 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1002                        ETH_ALEN);
1003                 next += ETH_ALEN;
1004         }
1005         if (params->req_ie_len) {
1006                 ev->cr.req_ie = next;
1007                 ev->cr.req_ie_len = params->req_ie_len;
1008                 memcpy((void *)ev->cr.req_ie, params->req_ie,
1009                        params->req_ie_len);
1010                 next += params->req_ie_len;
1011         }
1012         if (params->resp_ie_len) {
1013                 ev->cr.resp_ie = next;
1014                 ev->cr.resp_ie_len = params->resp_ie_len;
1015                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1016                        params->resp_ie_len);
1017                 next += params->resp_ie_len;
1018         }
1019         if (params->fils.kek_len) {
1020                 ev->cr.fils.kek = next;
1021                 ev->cr.fils.kek_len = params->fils.kek_len;
1022                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1023                        params->fils.kek_len);
1024                 next += params->fils.kek_len;
1025         }
1026         if (params->fils.pmk_len) {
1027                 ev->cr.fils.pmk = next;
1028                 ev->cr.fils.pmk_len = params->fils.pmk_len;
1029                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1030                        params->fils.pmk_len);
1031                 next += params->fils.pmk_len;
1032         }
1033         if (params->fils.pmkid) {
1034                 ev->cr.fils.pmkid = next;
1035                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1036                        WLAN_PMKID_LEN);
1037                 next += WLAN_PMKID_LEN;
1038         }
1039         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1040         if (params->fils.update_erp_next_seq_num)
1041                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1042         ev->cr.valid_links = params->valid_links;
1043         for_each_valid_link(params, link) {
1044                 if (params->links[link].bss)
1045                         cfg80211_hold_bss(
1046                                 bss_from_pub(params->links[link].bss));
1047                 ev->cr.links[link].bss = params->links[link].bss;
1048                 ev->cr.links[link].status = params->links[link].status;
1049
1050                 if (params->links[link].addr) {
1051                         ev->cr.links[link].addr = next;
1052                         memcpy((void *)ev->cr.links[link].addr,
1053                                params->links[link].addr,
1054                                ETH_ALEN);
1055                         next += ETH_ALEN;
1056                 }
1057                 if (params->links[link].bssid) {
1058                         ev->cr.links[link].bssid = next;
1059                         memcpy((void *)ev->cr.links[link].bssid,
1060                                params->links[link].bssid,
1061                                ETH_ALEN);
1062                         next += ETH_ALEN;
1063                 }
1064         }
1065         ev->cr.status = params->status;
1066         ev->cr.timeout_reason = params->timeout_reason;
1067
1068         spin_lock_irqsave(&wdev->event_lock, flags);
1069         list_add_tail(&ev->list, &wdev->event_list);
1070         spin_unlock_irqrestore(&wdev->event_lock, flags);
1071         queue_work(cfg80211_wq, &rdev->event_work);
1072 }
1073 EXPORT_SYMBOL(cfg80211_connect_done);
1074
1075 /* Consumes bss object one way or another */
1076 void __cfg80211_roamed(struct wireless_dev *wdev,
1077                        struct cfg80211_roam_info *info)
1078 {
1079 #ifdef CONFIG_CFG80211_WEXT
1080         union iwreq_data wrqu;
1081 #endif
1082         unsigned int link;
1083         const u8 *connected_addr;
1084
1085         lockdep_assert_wiphy(wdev->wiphy);
1086
1087         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1088                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1089                 goto out;
1090
1091         if (WARN_ON(!wdev->connected))
1092                 goto out;
1093
1094         if (info->valid_links) {
1095                 if (WARN_ON(!info->ap_mld_addr))
1096                         goto out;
1097
1098                 for_each_valid_link(info, link) {
1099                         if (WARN_ON(!info->links[link].addr))
1100                                 goto out;
1101                 }
1102         }
1103
1104         cfg80211_wdev_release_bsses(wdev);
1105
1106         for_each_valid_link(info, link) {
1107                 if (WARN_ON(!info->links[link].bss))
1108                         goto out;
1109         }
1110
1111         memset(wdev->links, 0, sizeof(wdev->links));
1112         wdev->valid_links = info->valid_links;
1113         for_each_valid_link(info, link) {
1114                 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1115                 wdev->links[link].client.current_bss =
1116                         bss_from_pub(info->links[link].bss);
1117         }
1118
1119         connected_addr = info->valid_links ?
1120                          info->ap_mld_addr :
1121                          info->links[0].bss->bssid;
1122         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1123         if (info->valid_links) {
1124                 for_each_valid_link(info, link)
1125                         memcpy(wdev->links[link].addr, info->links[link].addr,
1126                                ETH_ALEN);
1127         }
1128         wdev->unprot_beacon_reported = 0;
1129         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1130                             wdev->netdev, info, GFP_KERNEL);
1131
1132 #ifdef CONFIG_CFG80211_WEXT
1133         if (!info->valid_links) {
1134                 if (info->req_ie) {
1135                         memset(&wrqu, 0, sizeof(wrqu));
1136                         wrqu.data.length = info->req_ie_len;
1137                         wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1138                                             &wrqu, info->req_ie);
1139                 }
1140
1141                 if (info->resp_ie) {
1142                         memset(&wrqu, 0, sizeof(wrqu));
1143                         wrqu.data.length = info->resp_ie_len;
1144                         wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1145                                             &wrqu, info->resp_ie);
1146                 }
1147
1148                 memset(&wrqu, 0, sizeof(wrqu));
1149                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1150                 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1151                 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1152                 wdev->wext.prev_bssid_valid = true;
1153                 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1154         }
1155 #endif
1156
1157         return;
1158 out:
1159         for_each_valid_link(info, link)
1160                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1161 }
1162
1163 /* Consumes info->links.bss object(s) one way or another */
1164 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1165                      gfp_t gfp)
1166 {
1167         struct wireless_dev *wdev = dev->ieee80211_ptr;
1168         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1169         struct cfg80211_event *ev;
1170         unsigned long flags;
1171         u8 *next;
1172         unsigned int link;
1173         size_t link_info_size = 0;
1174         bool bss_not_found = false;
1175
1176         for_each_valid_link(info, link) {
1177                 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1178                 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1179
1180                 if (info->links[link].bss)
1181                         continue;
1182
1183                 info->links[link].bss =
1184                         cfg80211_get_bss(wdev->wiphy,
1185                                          info->links[link].channel,
1186                                          info->links[link].bssid,
1187                                          wdev->u.client.ssid,
1188                                          wdev->u.client.ssid_len,
1189                                          wdev->conn_bss_type,
1190                                          IEEE80211_PRIVACY_ANY);
1191
1192                 if (!info->links[link].bss) {
1193                         bss_not_found = true;
1194                         break;
1195                 }
1196         }
1197
1198         if (WARN_ON(bss_not_found))
1199                 goto out;
1200
1201         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1202                      info->fils.kek_len + info->fils.pmk_len +
1203                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1204                      (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1205         if (!ev)
1206                 goto out;
1207
1208         ev->type = EVENT_ROAMED;
1209         next = ((u8 *)ev) + sizeof(*ev);
1210         if (info->req_ie_len) {
1211                 ev->rm.req_ie = next;
1212                 ev->rm.req_ie_len = info->req_ie_len;
1213                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1214                 next += info->req_ie_len;
1215         }
1216         if (info->resp_ie_len) {
1217                 ev->rm.resp_ie = next;
1218                 ev->rm.resp_ie_len = info->resp_ie_len;
1219                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1220                        info->resp_ie_len);
1221                 next += info->resp_ie_len;
1222         }
1223         if (info->fils.kek_len) {
1224                 ev->rm.fils.kek = next;
1225                 ev->rm.fils.kek_len = info->fils.kek_len;
1226                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1227                        info->fils.kek_len);
1228                 next += info->fils.kek_len;
1229         }
1230         if (info->fils.pmk_len) {
1231                 ev->rm.fils.pmk = next;
1232                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1233                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1234                        info->fils.pmk_len);
1235                 next += info->fils.pmk_len;
1236         }
1237         if (info->fils.pmkid) {
1238                 ev->rm.fils.pmkid = next;
1239                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1240                        WLAN_PMKID_LEN);
1241                 next += WLAN_PMKID_LEN;
1242         }
1243         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1244         if (info->fils.update_erp_next_seq_num)
1245                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1246         if (info->ap_mld_addr) {
1247                 ev->rm.ap_mld_addr = next;
1248                 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1249                        ETH_ALEN);
1250                 next += ETH_ALEN;
1251         }
1252         ev->rm.valid_links = info->valid_links;
1253         for_each_valid_link(info, link) {
1254                 ev->rm.links[link].bss = info->links[link].bss;
1255
1256                 if (info->links[link].addr) {
1257                         ev->rm.links[link].addr = next;
1258                         memcpy((void *)ev->rm.links[link].addr,
1259                                info->links[link].addr,
1260                                ETH_ALEN);
1261                         next += ETH_ALEN;
1262                 }
1263
1264                 if (info->links[link].bssid) {
1265                         ev->rm.links[link].bssid = next;
1266                         memcpy((void *)ev->rm.links[link].bssid,
1267                                info->links[link].bssid,
1268                                ETH_ALEN);
1269                         next += ETH_ALEN;
1270                 }
1271         }
1272
1273         spin_lock_irqsave(&wdev->event_lock, flags);
1274         list_add_tail(&ev->list, &wdev->event_list);
1275         spin_unlock_irqrestore(&wdev->event_lock, flags);
1276         queue_work(cfg80211_wq, &rdev->event_work);
1277
1278         return;
1279 out:
1280         for_each_valid_link(info, link)
1281                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1282
1283 }
1284 EXPORT_SYMBOL(cfg80211_roamed);
1285
1286 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1287                                         const u8 *td_bitmap, u8 td_bitmap_len)
1288 {
1289         lockdep_assert_wiphy(wdev->wiphy);
1290
1291         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1292                 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1293                 wdev->iftype != NL80211_IFTYPE_AP &&
1294                 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1295                 return;
1296
1297         if (wdev->iftype == NL80211_IFTYPE_STATION ||
1298                 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1299                 if (WARN_ON(!wdev->connected) ||
1300                         WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1301                         return;
1302         }
1303
1304         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1305                                      peer_addr, td_bitmap, td_bitmap_len);
1306 }
1307
1308 void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1309                               const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1310 {
1311         struct wireless_dev *wdev = dev->ieee80211_ptr;
1312         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1313         struct cfg80211_event *ev;
1314         unsigned long flags;
1315
1316         if (WARN_ON(!peer_addr))
1317                 return;
1318
1319         ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1320         if (!ev)
1321                 return;
1322
1323         ev->type = EVENT_PORT_AUTHORIZED;
1324         memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1325         ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1326         ev->pa.td_bitmap_len = td_bitmap_len;
1327         memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1328
1329         /*
1330          * Use the wdev event list so that if there are pending
1331          * connected/roamed events, they will be reported first.
1332          */
1333         spin_lock_irqsave(&wdev->event_lock, flags);
1334         list_add_tail(&ev->list, &wdev->event_list);
1335         spin_unlock_irqrestore(&wdev->event_lock, flags);
1336         queue_work(cfg80211_wq, &rdev->event_work);
1337 }
1338 EXPORT_SYMBOL(cfg80211_port_authorized);
1339
1340 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1341                              size_t ie_len, u16 reason, bool from_ap)
1342 {
1343         struct wireless_dev *wdev = dev->ieee80211_ptr;
1344         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1345         int i;
1346 #ifdef CONFIG_CFG80211_WEXT
1347         union iwreq_data wrqu;
1348 #endif
1349
1350         lockdep_assert_wiphy(wdev->wiphy);
1351
1352         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1353                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1354                 return;
1355
1356         cfg80211_wdev_release_bsses(wdev);
1357         wdev->valid_links = 0;
1358         wdev->connected = false;
1359         wdev->u.client.ssid_len = 0;
1360         wdev->conn_owner_nlportid = 0;
1361         kfree_sensitive(wdev->connect_keys);
1362         wdev->connect_keys = NULL;
1363
1364         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1365
1366         /* stop critical protocol if supported */
1367         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1368                 rdev->crit_proto_nlportid = 0;
1369                 rdev_crit_proto_stop(rdev, wdev);
1370         }
1371
1372         /*
1373          * Delete all the keys ... pairwise keys can't really
1374          * exist any more anyway, but default keys might.
1375          */
1376         if (rdev->ops->del_key) {
1377                 int max_key_idx = 5;
1378
1379                 if (wiphy_ext_feature_isset(
1380                             wdev->wiphy,
1381                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1382                     wiphy_ext_feature_isset(
1383                             wdev->wiphy,
1384                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1385                         max_key_idx = 7;
1386                 for (i = 0; i <= max_key_idx; i++)
1387                         rdev_del_key(rdev, dev, -1, i, false, NULL);
1388         }
1389
1390         rdev_set_qos_map(rdev, dev, NULL);
1391
1392 #ifdef CONFIG_CFG80211_WEXT
1393         memset(&wrqu, 0, sizeof(wrqu));
1394         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1395         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1396         wdev->wext.connect.ssid_len = 0;
1397 #endif
1398
1399         schedule_work(&cfg80211_disconnect_work);
1400
1401         cfg80211_schedule_channels_check(wdev);
1402 }
1403
1404 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1405                            const u8 *ie, size_t ie_len,
1406                            bool locally_generated, gfp_t gfp)
1407 {
1408         struct wireless_dev *wdev = dev->ieee80211_ptr;
1409         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1410         struct cfg80211_event *ev;
1411         unsigned long flags;
1412
1413         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1414         if (!ev)
1415                 return;
1416
1417         ev->type = EVENT_DISCONNECTED;
1418         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1419         ev->dc.ie_len = ie_len;
1420         memcpy((void *)ev->dc.ie, ie, ie_len);
1421         ev->dc.reason = reason;
1422         ev->dc.locally_generated = locally_generated;
1423
1424         spin_lock_irqsave(&wdev->event_lock, flags);
1425         list_add_tail(&ev->list, &wdev->event_list);
1426         spin_unlock_irqrestore(&wdev->event_lock, flags);
1427         queue_work(cfg80211_wq, &rdev->event_work);
1428 }
1429 EXPORT_SYMBOL(cfg80211_disconnected);
1430
1431 /*
1432  * API calls for nl80211/wext compatibility code
1433  */
1434 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1435                      struct net_device *dev,
1436                      struct cfg80211_connect_params *connect,
1437                      struct cfg80211_cached_keys *connkeys,
1438                      const u8 *prev_bssid)
1439 {
1440         struct wireless_dev *wdev = dev->ieee80211_ptr;
1441         int err;
1442
1443         lockdep_assert_wiphy(wdev->wiphy);
1444
1445         /*
1446          * If we have an ssid_len, we're trying to connect or are
1447          * already connected, so reject a new SSID unless it's the
1448          * same (which is the case for re-association.)
1449          */
1450         if (wdev->u.client.ssid_len &&
1451             (wdev->u.client.ssid_len != connect->ssid_len ||
1452              memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1453                 return -EALREADY;
1454
1455         /*
1456          * If connected, reject (re-)association unless prev_bssid
1457          * matches the current BSSID.
1458          */
1459         if (wdev->connected) {
1460                 if (!prev_bssid)
1461                         return -EALREADY;
1462                 if (!ether_addr_equal(prev_bssid,
1463                                       wdev->u.client.connected_addr))
1464                         return -ENOTCONN;
1465         }
1466
1467         /*
1468          * Reject if we're in the process of connecting with WEP,
1469          * this case isn't very interesting and trying to handle
1470          * it would make the code much more complex.
1471          */
1472         if (wdev->connect_keys)
1473                 return -EINPROGRESS;
1474
1475         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1476                                   rdev->wiphy.ht_capa_mod_mask);
1477         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1478                                    rdev->wiphy.vht_capa_mod_mask);
1479
1480         if (connkeys && connkeys->def >= 0) {
1481                 int idx;
1482                 u32 cipher;
1483
1484                 idx = connkeys->def;
1485                 cipher = connkeys->params[idx].cipher;
1486                 /* If given a WEP key we may need it for shared key auth */
1487                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1488                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1489                         connect->key_idx = idx;
1490                         connect->key = connkeys->params[idx].key;
1491                         connect->key_len = connkeys->params[idx].key_len;
1492
1493                         /*
1494                          * If ciphers are not set (e.g. when going through
1495                          * iwconfig), we have to set them appropriately here.
1496                          */
1497                         if (connect->crypto.cipher_group == 0)
1498                                 connect->crypto.cipher_group = cipher;
1499
1500                         if (connect->crypto.n_ciphers_pairwise == 0) {
1501                                 connect->crypto.n_ciphers_pairwise = 1;
1502                                 connect->crypto.ciphers_pairwise[0] = cipher;
1503                         }
1504                 }
1505         } else {
1506                 if (WARN_ON(connkeys))
1507                         return -EINVAL;
1508
1509                 /* connect can point to wdev->wext.connect which
1510                  * can hold key data from a previous connection
1511                  */
1512                 connect->key = NULL;
1513                 connect->key_len = 0;
1514                 connect->key_idx = 0;
1515         }
1516
1517         wdev->connect_keys = connkeys;
1518         memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1519         wdev->u.client.ssid_len = connect->ssid_len;
1520
1521         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1522                                               IEEE80211_BSS_TYPE_ESS;
1523
1524         if (!rdev->ops->connect)
1525                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1526         else
1527                 err = rdev_connect(rdev, dev, connect);
1528
1529         if (err) {
1530                 wdev->connect_keys = NULL;
1531                 /*
1532                  * This could be reassoc getting refused, don't clear
1533                  * ssid_len in that case.
1534                  */
1535                 if (!wdev->connected)
1536                         wdev->u.client.ssid_len = 0;
1537                 return err;
1538         }
1539
1540         return 0;
1541 }
1542
1543 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1544                         struct net_device *dev, u16 reason, bool wextev)
1545 {
1546         struct wireless_dev *wdev = dev->ieee80211_ptr;
1547         int err = 0;
1548
1549         lockdep_assert_wiphy(wdev->wiphy);
1550
1551         kfree_sensitive(wdev->connect_keys);
1552         wdev->connect_keys = NULL;
1553
1554         wdev->conn_owner_nlportid = 0;
1555
1556         if (wdev->conn)
1557                 err = cfg80211_sme_disconnect(wdev, reason);
1558         else if (!rdev->ops->disconnect)
1559                 cfg80211_mlme_down(rdev, dev);
1560         else if (wdev->u.client.ssid_len)
1561                 err = rdev_disconnect(rdev, dev, reason);
1562
1563         /*
1564          * Clear ssid_len unless we actually were fully connected,
1565          * in which case cfg80211_disconnected() will take care of
1566          * this later.
1567          */
1568         if (!wdev->connected)
1569                 wdev->u.client.ssid_len = 0;
1570
1571         return err;
1572 }
1573
1574 /*
1575  * Used to clean up after the connection / connection attempt owner socket
1576  * disconnects
1577  */
1578 void cfg80211_autodisconnect_wk(struct work_struct *work)
1579 {
1580         struct wireless_dev *wdev =
1581                 container_of(work, struct wireless_dev, disconnect_wk);
1582         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1583
1584         guard(wiphy)(wdev->wiphy);
1585
1586         if (wdev->conn_owner_nlportid) {
1587                 switch (wdev->iftype) {
1588                 case NL80211_IFTYPE_ADHOC:
1589                         cfg80211_leave_ibss(rdev, wdev->netdev, false);
1590                         break;
1591                 case NL80211_IFTYPE_AP:
1592                 case NL80211_IFTYPE_P2P_GO:
1593                         cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1594                         break;
1595                 case NL80211_IFTYPE_MESH_POINT:
1596                         cfg80211_leave_mesh(rdev, wdev->netdev);
1597                         break;
1598                 case NL80211_IFTYPE_STATION:
1599                 case NL80211_IFTYPE_P2P_CLIENT:
1600                         /*
1601                          * Use disconnect_bssid if still connecting and
1602                          * ops->disconnect not implemented.  Otherwise we can
1603                          * use cfg80211_disconnect.
1604                          */
1605                         if (rdev->ops->disconnect || wdev->connected)
1606                                 cfg80211_disconnect(rdev, wdev->netdev,
1607                                                     WLAN_REASON_DEAUTH_LEAVING,
1608                                                     true);
1609                         else
1610                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1611                                                      wdev->disconnect_bssid,
1612                                                      NULL, 0,
1613                                                      WLAN_REASON_DEAUTH_LEAVING,
1614                                                      false);
1615                         break;
1616                 default:
1617                         break;
1618                 }
1619         }
1620 }