net/wireless/sme.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * SME code for cfg80211
   4  * both driver SME event handling and the SME implementation
   5  * (for nl80211's connect() and wext)
   6  *
   7  * Copyright 2009       Johannes Berg <johannes@sipsolutions.net>
   8  * Copyright (C) 2009, 2020, 2022-2023 Intel Corporation. All rights reserved.
   9  * Copyright 2017       Intel Deutschland GmbH
  10  */
  11
  12 #include <linux/etherdevice.h>
  13 #include <linux/if_arp.h>
  14 #include <linux/slab.h>
  15 #include <linux/workqueue.h>
  16 #include <linux/wireless.h>
  17 #include <linux/export.h>
  18 #include <net/iw_handler.h>
  19 #include <net/cfg80211.h>
  20 #include <net/rtnetlink.h>
  21 #include "nl80211.h"
  22 #include "reg.h"
  23 #include "rdev-ops.h"
  24
  25 /*
  26  * Software SME in cfg80211, using auth/assoc/deauth calls to the
  27  * driver. This is for implementing nl80211's connect/disconnect
  28  * and wireless extensions (if configured.)
  29  */
  30
  31 struct cfg80211_conn {
  32         struct cfg80211_connect_params params;
  33         /* these are sub-states of the _CONNECTING sme_state */
  34         enum {
  35                 CFG80211_CONN_SCANNING,
  36                 CFG80211_CONN_SCAN_AGAIN,
  37                 CFG80211_CONN_AUTHENTICATE_NEXT,
  38                 CFG80211_CONN_AUTHENTICATING,
  39                 CFG80211_CONN_AUTH_FAILED_TIMEOUT,
  40                 CFG80211_CONN_ASSOCIATE_NEXT,
  41                 CFG80211_CONN_ASSOCIATING,
  42                 CFG80211_CONN_ASSOC_FAILED,
  43                 CFG80211_CONN_ASSOC_FAILED_TIMEOUT,
  44                 CFG80211_CONN_DEAUTH,
  45                 CFG80211_CONN_ABANDON,
  46                 CFG80211_CONN_CONNECTED,
  47         } state;
  48         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
  49         const u8 *ie;
  50         size_t ie_len;
  51         bool auto_auth, prev_bssid_valid;
  52 };
  53
  54 static void cfg80211_sme_free(struct wireless_dev *wdev)
  55 {
  56         if (!wdev->conn)
  57                 return;
  58
  59         kfree(wdev->conn->ie);
  60         kfree(wdev->conn);
  61         wdev->conn = NULL;
  62 }
  63
  64 static int cfg80211_conn_scan(struct wireless_dev *wdev)
  65 {
  66         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
  67         struct cfg80211_scan_request *request;
  68         int n_channels, err;
  69
  70         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->channels[n_channels];
 119         request->n_ssids = 1;
 120
 121         memcpy(request->ssids[0].ssid, wdev->conn->params.ssid,
 122                 wdev->conn->params.ssid_len);
 123         request->ssids[0].ssid_len = wdev->conn->params.ssid_len;
 124
 125         eth_broadcast_addr(request->bssid);
 126
 127         request->wdev = wdev;
 128         request->wiphy = &rdev->wiphy;
 129         request->scan_start = jiffies;
 130
 131         rdev->scan_req = request;
 132
 133         err = rdev_scan(rdev, request);
 134         if (!err) {
 135                 wdev->conn->state = CFG80211_CONN_SCANNING;
 136                 nl80211_send_scan_start(rdev, wdev);
 137                 dev_hold(wdev->netdev);
 138         } else {
 139                 rdev->scan_req = NULL;
 140                 kfree(request);
 141         }
 142         return err;
 143 }
 144
 145 static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 146                                  enum nl80211_timeout_reason *treason)
 147 {
 148         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 149         struct cfg80211_connect_params *params;
 150         struct cfg80211_auth_request auth_req = {};
 151         struct cfg80211_assoc_request req = {};
 152         int err;
 153
 154         lockdep_assert_wiphy(wdev->wiphy);
 155
 156         if (!wdev->conn)
 157                 return 0;
 158
 159         params = &wdev->conn->params;
 160
 161         switch (wdev->conn->state) {
 162         case CFG80211_CONN_SCANNING:
 163                 /* didn't find it during scan ... */
 164                 return -ENOENT;
 165         case CFG80211_CONN_SCAN_AGAIN:
 166                 return cfg80211_conn_scan(wdev);
 167         case CFG80211_CONN_AUTHENTICATE_NEXT:
 168                 if (WARN_ON(!rdev->ops->auth))
 169                         return -EOPNOTSUPP;
 170                 wdev->conn->state = CFG80211_CONN_AUTHENTICATING;
 171                 auth_req.key = params->key;
 172                 auth_req.key_len = params->key_len;
 173                 auth_req.key_idx = params->key_idx;
 174                 auth_req.auth_type = params->auth_type;
 175                 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 176                                                 params->bssid,
 177                                                 params->ssid, params->ssid_len,
 178                                                 IEEE80211_BSS_TYPE_ESS,
 179                                                 IEEE80211_PRIVACY_ANY);
 180                 auth_req.link_id = -1;
 181                 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req);
 182                 cfg80211_put_bss(&rdev->wiphy, auth_req.bss);
 183                 return err;
 184         case CFG80211_CONN_AUTH_FAILED_TIMEOUT:
 185                 *treason = NL80211_TIMEOUT_AUTH;
 186                 return -ENOTCONN;
 187         case CFG80211_CONN_ASSOCIATE_NEXT:
 188                 if (WARN_ON(!rdev->ops->assoc))
 189                         return -EOPNOTSUPP;
 190                 wdev->conn->state = CFG80211_CONN_ASSOCIATING;
 191                 if (wdev->conn->prev_bssid_valid)
 192                         req.prev_bssid = wdev->conn->prev_bssid;
 193                 req.ie = params->ie;
 194                 req.ie_len = params->ie_len;
 195                 req.use_mfp = params->mfp != NL80211_MFP_NO;
 196                 req.crypto = params->crypto;
 197                 req.flags = params->flags;
 198                 req.ht_capa = params->ht_capa;
 199                 req.ht_capa_mask = params->ht_capa_mask;
 200                 req.vht_capa = params->vht_capa;
 201                 req.vht_capa_mask = params->vht_capa_mask;
 202                 req.link_id = -1;
 203
 204                 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel,
 205                                            params->bssid,
 206                                            params->ssid, params->ssid_len,
 207                                            IEEE80211_BSS_TYPE_ESS,
 208                                            IEEE80211_PRIVACY_ANY);
 209                 if (!req.bss) {
 210                         err = -ENOENT;
 211                 } else {
 212                         err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req);
 213                         cfg80211_put_bss(&rdev->wiphy, req.bss);
 214                 }
 215
 216                 if (err)
 217                         cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 218                                              NULL, 0,
 219                                              WLAN_REASON_DEAUTH_LEAVING,
 220                                              false);
 221                 return err;
 222         case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 223                 *treason = NL80211_TIMEOUT_ASSOC;
 224                 fallthrough;
 225         case CFG80211_CONN_ASSOC_FAILED:
 226                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 227                                      NULL, 0,
 228                                      WLAN_REASON_DEAUTH_LEAVING, false);
 229                 return -ENOTCONN;
 230         case CFG80211_CONN_DEAUTH:
 231                 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 232                                      NULL, 0,
 233                                      WLAN_REASON_DEAUTH_LEAVING, false);
 234                 fallthrough;
 235         case CFG80211_CONN_ABANDON:
 236                 /* free directly, disconnected event already sent */
 237                 cfg80211_sme_free(wdev);
 238                 return 0;
 239         default:
 240                 return 0;
 241         }
 242 }
 243
 244 void cfg80211_conn_work(struct work_struct *work)
 245 {
 246         struct cfg80211_registered_device *rdev =
 247                 container_of(work, struct cfg80211_registered_device, conn_work);
 248         struct wireless_dev *wdev;
 249         u8 bssid_buf[ETH_ALEN], *bssid = NULL;
 250         enum nl80211_timeout_reason treason;
 251
 252         wiphy_lock(&rdev->wiphy);
 253
 254         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 255                 if (!wdev->netdev)
 256                         continue;
 257
 258                 if (!netif_running(wdev->netdev))
 259                         continue;
 260
 261                 if (!wdev->conn ||
 262                     wdev->conn->state == CFG80211_CONN_CONNECTED)
 263                         continue;
 264
 265                 if (wdev->conn->params.bssid) {
 266                         memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN);
 267                         bssid = bssid_buf;
 268                 }
 269                 treason = NL80211_TIMEOUT_UNSPECIFIED;
 270                 if (cfg80211_conn_do_work(wdev, &treason)) {
 271                         struct cfg80211_connect_resp_params cr;
 272
 273                         memset(&cr, 0, sizeof(cr));
 274                         cr.status = -1;
 275                         cr.links[0].bssid = bssid;
 276                         cr.timeout_reason = treason;
 277                         __cfg80211_connect_result(wdev->netdev, &cr, false);
 278                 }
 279         }
 280
 281         wiphy_unlock(&rdev->wiphy);
 282 }
 283
 284 static void cfg80211_step_auth_next(struct cfg80211_conn *conn,
 285                                     struct cfg80211_bss *bss)
 286 {
 287         memcpy(conn->bssid, bss->bssid, ETH_ALEN);
 288         conn->params.bssid = conn->bssid;
 289         conn->params.channel = bss->channel;
 290         conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 291 }
 292
 293 /* Returned bss is reference counted and must be cleaned up appropriately. */
 294 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev)
 295 {
 296         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 297         struct cfg80211_bss *bss;
 298
 299         lockdep_assert_wiphy(wdev->wiphy);
 300
 301         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 302                                wdev->conn->params.bssid,
 303                                wdev->conn->params.ssid,
 304                                wdev->conn->params.ssid_len,
 305                                wdev->conn_bss_type,
 306                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 307         if (!bss)
 308                 return NULL;
 309
 310         cfg80211_step_auth_next(wdev->conn, bss);
 311         schedule_work(&rdev->conn_work);
 312
 313         return bss;
 314 }
 315
 316 void cfg80211_sme_scan_done(struct net_device *dev)
 317 {
 318         struct wireless_dev *wdev = dev->ieee80211_ptr;
 319         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 320         struct cfg80211_bss *bss;
 321
 322         lockdep_assert_wiphy(wdev->wiphy);
 323
 324         if (!wdev->conn)
 325                 return;
 326
 327         if (wdev->conn->state != CFG80211_CONN_SCANNING &&
 328             wdev->conn->state != CFG80211_CONN_SCAN_AGAIN)
 329                 return;
 330
 331         bss = cfg80211_get_conn_bss(wdev);
 332         if (bss)
 333                 cfg80211_put_bss(&rdev->wiphy, bss);
 334         else
 335                 schedule_work(&rdev->conn_work);
 336 }
 337
 338 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len)
 339 {
 340         struct wiphy *wiphy = wdev->wiphy;
 341         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 342         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 343         u16 status_code = le16_to_cpu(mgmt->u.auth.status_code);
 344
 345         lockdep_assert_wiphy(wdev->wiphy);
 346
 347         if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED)
 348                 return;
 349
 350         if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG &&
 351             wdev->conn->auto_auth &&
 352             wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) {
 353                 /* select automatically between only open, shared, leap */
 354                 switch (wdev->conn->params.auth_type) {
 355                 case NL80211_AUTHTYPE_OPEN_SYSTEM:
 356                         if (wdev->connect_keys)
 357                                 wdev->conn->params.auth_type =
 358                                         NL80211_AUTHTYPE_SHARED_KEY;
 359                         else
 360                                 wdev->conn->params.auth_type =
 361                                         NL80211_AUTHTYPE_NETWORK_EAP;
 362                         break;
 363                 case NL80211_AUTHTYPE_SHARED_KEY:
 364                         wdev->conn->params.auth_type =
 365                                 NL80211_AUTHTYPE_NETWORK_EAP;
 366                         break;
 367                 default:
 368                         /* huh? */
 369                         wdev->conn->params.auth_type =
 370                                 NL80211_AUTHTYPE_OPEN_SYSTEM;
 371                         break;
 372                 }
 373                 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT;
 374                 schedule_work(&rdev->conn_work);
 375         } else if (status_code != WLAN_STATUS_SUCCESS) {
 376                 struct cfg80211_connect_resp_params cr;
 377
 378                 memset(&cr, 0, sizeof(cr));
 379                 cr.status = status_code;
 380                 cr.links[0].bssid = mgmt->bssid;
 381                 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED;
 382                 __cfg80211_connect_result(wdev->netdev, &cr, false);
 383         } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) {
 384                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 385                 schedule_work(&rdev->conn_work);
 386         }
 387 }
 388
 389 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status)
 390 {
 391         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 392
 393         if (!wdev->conn)
 394                 return false;
 395
 396         if (status == WLAN_STATUS_SUCCESS) {
 397                 wdev->conn->state = CFG80211_CONN_CONNECTED;
 398                 return false;
 399         }
 400
 401         if (wdev->conn->prev_bssid_valid) {
 402                 /*
 403                  * Some stupid APs don't accept reassoc, so we
 404                  * need to fall back to trying regular assoc;
 405                  * return true so no event is sent to userspace.
 406                  */
 407                 wdev->conn->prev_bssid_valid = false;
 408                 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT;
 409                 schedule_work(&rdev->conn_work);
 410                 return true;
 411         }
 412
 413         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED;
 414         schedule_work(&rdev->conn_work);
 415         return false;
 416 }
 417
 418 void cfg80211_sme_deauth(struct wireless_dev *wdev)
 419 {
 420         cfg80211_sme_free(wdev);
 421 }
 422
 423 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev)
 424 {
 425         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 426
 427         if (!wdev->conn)
 428                 return;
 429
 430         wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT;
 431         schedule_work(&rdev->conn_work);
 432 }
 433
 434 void cfg80211_sme_disassoc(struct wireless_dev *wdev)
 435 {
 436         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 437
 438         if (!wdev->conn)
 439                 return;
 440
 441         wdev->conn->state = CFG80211_CONN_DEAUTH;
 442         schedule_work(&rdev->conn_work);
 443 }
 444
 445 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev)
 446 {
 447         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 448
 449         if (!wdev->conn)
 450                 return;
 451
 452         wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT;
 453         schedule_work(&rdev->conn_work);
 454 }
 455
 456 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev)
 457 {
 458         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 459
 460         if (!wdev->conn)
 461                 return;
 462
 463         wdev->conn->state = CFG80211_CONN_ABANDON;
 464         schedule_work(&rdev->conn_work);
 465 }
 466
 467 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev)
 468 {
 469         unsigned int link;
 470
 471         for_each_valid_link(wdev, link) {
 472                 if (!wdev->links[link].client.current_bss)
 473                         continue;
 474                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 475                 cfg80211_put_bss(wdev->wiphy,
 476                                  &wdev->links[link].client.current_bss->pub);
 477                 wdev->links[link].client.current_bss = NULL;
 478         }
 479 }
 480
 481 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask)
 482 {
 483         unsigned int link;
 484
 485         for_each_valid_link(wdev, link) {
 486                 if (!wdev->links[link].client.current_bss ||
 487                     !(link_mask & BIT(link)))
 488                         continue;
 489                 cfg80211_unhold_bss(wdev->links[link].client.current_bss);
 490                 cfg80211_put_bss(wdev->wiphy,
 491                                  &wdev->links[link].client.current_bss->pub);
 492                 wdev->links[link].client.current_bss = NULL;
 493         }
 494 }
 495
 496 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev,
 497                                      const u8 *ies, size_t ies_len,
 498                                      const u8 **out_ies, size_t *out_ies_len)
 499 {
 500         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 501         u8 *buf;
 502         size_t offs;
 503
 504         if (!rdev->wiphy.extended_capabilities_len ||
 505             (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) {
 506                 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL);
 507                 if (!*out_ies)
 508                         return -ENOMEM;
 509                 *out_ies_len = ies_len;
 510                 return 0;
 511         }
 512
 513         buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2,
 514                       GFP_KERNEL);
 515         if (!buf)
 516                 return -ENOMEM;
 517
 518         if (ies_len) {
 519                 static const u8 before_extcapa[] = {
 520                         /* not listing IEs expected to be created by driver */
 521                         WLAN_EID_RSN,
 522                         WLAN_EID_QOS_CAPA,
 523                         WLAN_EID_RRM_ENABLED_CAPABILITIES,
 524                         WLAN_EID_MOBILITY_DOMAIN,
 525                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 526                         WLAN_EID_BSS_COEX_2040,
 527                 };
 528
 529                 offs = ieee80211_ie_split(ies, ies_len, before_extcapa,
 530                                           ARRAY_SIZE(before_extcapa), 0);
 531                 memcpy(buf, ies, offs);
 532                 /* leave a whole for extended capabilities IE */
 533                 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2,
 534                        ies + offs, ies_len - offs);
 535         } else {
 536                 offs = 0;
 537         }
 538
 539         /* place extended capabilities IE (with only driver capabilities) */
 540         buf[offs] = WLAN_EID_EXT_CAPABILITY;
 541         buf[offs + 1] = rdev->wiphy.extended_capabilities_len;
 542         memcpy(buf + offs + 2,
 543                rdev->wiphy.extended_capabilities,
 544                rdev->wiphy.extended_capabilities_len);
 545
 546         *out_ies = buf;
 547         *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2;
 548
 549         return 0;
 550 }
 551
 552 static int cfg80211_sme_connect(struct wireless_dev *wdev,
 553                                 struct cfg80211_connect_params *connect,
 554                                 const u8 *prev_bssid)
 555 {
 556         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 557         struct cfg80211_bss *bss;
 558         int err;
 559
 560         if (!rdev->ops->auth || !rdev->ops->assoc)
 561                 return -EOPNOTSUPP;
 562
 563         cfg80211_wdev_release_bsses(wdev);
 564
 565         if (wdev->connected) {
 566                 cfg80211_sme_free(wdev);
 567                 wdev->connected = false;
 568         }
 569
 570         if (wdev->conn)
 571                 return -EINPROGRESS;
 572
 573         wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);
 574         if (!wdev->conn)
 575                 return -ENOMEM;
 576
 577         /*
 578          * Copy all parameters, and treat explicitly IEs, BSSID, SSID.
 579          */
 580         memcpy(&wdev->conn->params, connect, sizeof(*connect));
 581         if (connect->bssid) {
 582                 wdev->conn->params.bssid = wdev->conn->bssid;
 583                 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN);
 584         }
 585
 586         if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len,
 587                                       &wdev->conn->ie,
 588                                       &wdev->conn->params.ie_len)) {
 589                 kfree(wdev->conn);
 590                 wdev->conn = NULL;
 591                 return -ENOMEM;
 592         }
 593         wdev->conn->params.ie = wdev->conn->ie;
 594
 595         if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) {
 596                 wdev->conn->auto_auth = true;
 597                 /* start with open system ... should mostly work */
 598                 wdev->conn->params.auth_type =
 599                         NL80211_AUTHTYPE_OPEN_SYSTEM;
 600         } else {
 601                 wdev->conn->auto_auth = false;
 602         }
 603
 604         wdev->conn->params.ssid = wdev->u.client.ssid;
 605         wdev->conn->params.ssid_len = wdev->u.client.ssid_len;
 606
 607         /* see if we have the bss already */
 608         bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel,
 609                                wdev->conn->params.bssid,
 610                                wdev->conn->params.ssid,
 611                                wdev->conn->params.ssid_len,
 612                                wdev->conn_bss_type,
 613                                IEEE80211_PRIVACY(wdev->conn->params.privacy));
 614
 615         if (prev_bssid) {
 616                 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN);
 617                 wdev->conn->prev_bssid_valid = true;
 618         }
 619
 620         /* we're good if we have a matching bss struct */
 621         if (bss) {
 622                 enum nl80211_timeout_reason treason;
 623
 624                 cfg80211_step_auth_next(wdev->conn, bss);
 625                 err = cfg80211_conn_do_work(wdev, &treason);
 626                 cfg80211_put_bss(wdev->wiphy, bss);
 627         } else {
 628                 /* otherwise we'll need to scan for the AP first */
 629                 err = cfg80211_conn_scan(wdev);
 630
 631                 /*
 632                  * If we can't scan right now, then we need to scan again
 633                  * after the current scan finished, since the parameters
 634                  * changed (unless we find a good AP anyway).
 635                  */
 636                 if (err == -EBUSY) {
 637                         err = 0;
 638                         wdev->conn->state = CFG80211_CONN_SCAN_AGAIN;
 639                 }
 640         }
 641
 642         if (err)
 643                 cfg80211_sme_free(wdev);
 644
 645         return err;
 646 }
 647
 648 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason)
 649 {
 650         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 651         int err;
 652
 653         if (!wdev->conn)
 654                 return 0;
 655
 656         if (!rdev->ops->deauth)
 657                 return -EOPNOTSUPP;
 658
 659         if (wdev->conn->state == CFG80211_CONN_SCANNING ||
 660             wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) {
 661                 err = 0;
 662                 goto out;
 663         }
 664
 665         /* wdev->conn->params.bssid must be set if > SCANNING */
 666         err = cfg80211_mlme_deauth(rdev, wdev->netdev,
 667                                    wdev->conn->params.bssid,
 668                                    NULL, 0, reason, false);
 669  out:
 670         cfg80211_sme_free(wdev);
 671         return err;
 672 }
 673
 674 /*
 675  * code shared for in-device and software SME
 676  */
 677
 678 static bool cfg80211_is_all_idle(void)
 679 {
 680         struct cfg80211_registered_device *rdev;
 681         struct wireless_dev *wdev;
 682         bool is_all_idle = true;
 683
 684         /*
 685          * All devices must be idle as otherwise if you are actively
 686          * scanning some new beacon hints could be learned and would
 687          * count as new regulatory hints.
 688          * Also if there is any other active beaconing interface we
 689          * need not issue a disconnect hint and reset any info such
 690          * as chan dfs state, etc.
 691          */
 692         for_each_rdev(rdev) {
 693                 wiphy_lock(&rdev->wiphy);
 694                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 695                         if (wdev->conn || wdev->connected ||
 696                             cfg80211_beaconing_iface_active(wdev))
 697                                 is_all_idle = false;
 698                 }
 699                 wiphy_unlock(&rdev->wiphy);
 700         }
 701
 702         return is_all_idle;
 703 }
 704
 705 static void disconnect_work(struct work_struct *work)
 706 {
 707         rtnl_lock();
 708         if (cfg80211_is_all_idle())
 709                 regulatory_hint_disconnect();
 710         rtnl_unlock();
 711 }
 712
 713 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 714
 715 static void
 716 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev,
 717                                       struct cfg80211_connect_resp_params *cr)
 718 {
 719         unsigned int link;
 720
 721         for_each_valid_link(cr, link) {
 722                 if (!cr->links[link].bss)
 723                         continue;
 724                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 725                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 726         }
 727 }
 728
 729 /*
 730  * API calls for drivers implementing connect/disconnect and
 731  * SME event handling
 732  */
 733
 734 /* This method must consume bss one way or another */
 735 void __cfg80211_connect_result(struct net_device *dev,
 736                                struct cfg80211_connect_resp_params *cr,
 737                                bool wextev)
 738 {
 739         struct wireless_dev *wdev = dev->ieee80211_ptr;
 740         const struct element *country_elem = NULL;
 741         const struct element *ssid;
 742         const u8 *country_data;
 743         u8 country_datalen;
 744 #ifdef CONFIG_CFG80211_WEXT
 745         union iwreq_data wrqu;
 746 #endif
 747         unsigned int link;
 748         const u8 *connected_addr;
 749         bool bss_not_found = false;
 750
 751         lockdep_assert_wiphy(wdev->wiphy);
 752
 753         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
 754                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
 755                 goto out;
 756
 757         if (cr->valid_links) {
 758                 if (WARN_ON(!cr->ap_mld_addr))
 759                         goto out;
 760
 761                 for_each_valid_link(cr, link) {
 762                         if (WARN_ON(!cr->links[link].addr))
 763                                 goto out;
 764                 }
 765
 766                 if (WARN_ON(wdev->connect_keys))
 767                         goto out;
 768         }
 769
 770         wdev->unprot_beacon_reported = 0;
 771         nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr,
 772                                     GFP_KERNEL);
 773         connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid;
 774
 775 #ifdef CONFIG_CFG80211_WEXT
 776         if (wextev && !cr->valid_links) {
 777                 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) {
 778                         memset(&wrqu, 0, sizeof(wrqu));
 779                         wrqu.data.length = cr->req_ie_len;
 780                         wireless_send_event(dev, IWEVASSOCREQIE, &wrqu,
 781                                             cr->req_ie);
 782                 }
 783
 784                 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) {
 785                         memset(&wrqu, 0, sizeof(wrqu));
 786                         wrqu.data.length = cr->resp_ie_len;
 787                         wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu,
 788                                             cr->resp_ie);
 789                 }
 790
 791                 memset(&wrqu, 0, sizeof(wrqu));
 792                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
 793                 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) {
 794                         memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
 795                         memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
 796                         wdev->wext.prev_bssid_valid = true;
 797                 }
 798                 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
 799         }
 800 #endif
 801
 802         if (cr->status == WLAN_STATUS_SUCCESS) {
 803                 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) {
 804                         for_each_valid_link(cr, link) {
 805                                 if (WARN_ON_ONCE(!cr->links[link].bss))
 806                                         break;
 807                         }
 808                 }
 809
 810                 for_each_valid_link(cr, link) {
 811                         /* don't do extra lookups for failures */
 812                         if (cr->links[link].status != WLAN_STATUS_SUCCESS)
 813                                 continue;
 814
 815                         if (cr->links[link].bss)
 816                                 continue;
 817
 818                         cr->links[link].bss =
 819                                 cfg80211_get_bss(wdev->wiphy, NULL,
 820                                                  cr->links[link].bssid,
 821                                                  wdev->u.client.ssid,
 822                                                  wdev->u.client.ssid_len,
 823                                                  wdev->conn_bss_type,
 824                                                  IEEE80211_PRIVACY_ANY);
 825                         if (!cr->links[link].bss) {
 826                                 bss_not_found = true;
 827                                 break;
 828                         }
 829                         cfg80211_hold_bss(bss_from_pub(cr->links[link].bss));
 830                 }
 831         }
 832
 833         cfg80211_wdev_release_bsses(wdev);
 834
 835         if (cr->status != WLAN_STATUS_SUCCESS) {
 836                 kfree_sensitive(wdev->connect_keys);
 837                 wdev->connect_keys = NULL;
 838                 wdev->u.client.ssid_len = 0;
 839                 wdev->conn_owner_nlportid = 0;
 840                 cfg80211_connect_result_release_bsses(wdev, cr);
 841                 cfg80211_sme_free(wdev);
 842                 return;
 843         }
 844
 845         if (WARN_ON(bss_not_found)) {
 846                 cfg80211_connect_result_release_bsses(wdev, cr);
 847                 return;
 848         }
 849
 850         memset(wdev->links, 0, sizeof(wdev->links));
 851         for_each_valid_link(cr, link) {
 852                 if (cr->links[link].status == WLAN_STATUS_SUCCESS)
 853                         continue;
 854                 cr->valid_links &= ~BIT(link);
 855                 /* don't require bss pointer for failed links */
 856                 if (!cr->links[link].bss)
 857                         continue;
 858                 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss));
 859                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 860         }
 861         wdev->valid_links = cr->valid_links;
 862         for_each_valid_link(cr, link)
 863                 wdev->links[link].client.current_bss =
 864                         bss_from_pub(cr->links[link].bss);
 865         wdev->connected = true;
 866         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
 867         if (cr->valid_links) {
 868                 for_each_valid_link(cr, link)
 869                         memcpy(wdev->links[link].addr, cr->links[link].addr,
 870                                ETH_ALEN);
 871         }
 872
 873         cfg80211_upload_connect_keys(wdev);
 874
 875         rcu_read_lock();
 876         for_each_valid_link(cr, link) {
 877                 country_elem =
 878                         ieee80211_bss_get_elem(cr->links[link].bss,
 879                                                WLAN_EID_COUNTRY);
 880                 if (country_elem)
 881                         break;
 882         }
 883         if (!country_elem) {
 884                 rcu_read_unlock();
 885                 return;
 886         }
 887
 888         country_datalen = country_elem->datalen;
 889         country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC);
 890         rcu_read_unlock();
 891
 892         if (!country_data)
 893                 return;
 894
 895         regulatory_hint_country_ie(wdev->wiphy,
 896                                    cr->links[link].bss->channel->band,
 897                                    country_data, country_datalen);
 898         kfree(country_data);
 899
 900         if (!wdev->u.client.ssid_len) {
 901                 rcu_read_lock();
 902                 for_each_valid_link(cr, link) {
 903                         ssid = ieee80211_bss_get_elem(cr->links[link].bss,
 904                                                       WLAN_EID_SSID);
 905
 906                         if (!ssid || !ssid->datalen)
 907                                 continue;
 908
 909                         memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen);
 910                         wdev->u.client.ssid_len = ssid->datalen;
 911                         break;
 912                 }
 913                 rcu_read_unlock();
 914         }
 915
 916         return;
 917 out:
 918         for_each_valid_link(cr, link)
 919                 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss);
 920 }
 921
 922 static void cfg80211_update_link_bss(struct wireless_dev *wdev,
 923                                      struct cfg80211_bss **bss)
 924 {
 925         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 926         struct cfg80211_internal_bss *ibss;
 927
 928         if (!*bss)
 929                 return;
 930
 931         ibss = bss_from_pub(*bss);
 932         if (list_empty(&ibss->list)) {
 933                 struct cfg80211_bss *found = NULL, *tmp = *bss;
 934
 935                 found = cfg80211_get_bss(wdev->wiphy, NULL,
 936                                          (*bss)->bssid,
 937                                          wdev->u.client.ssid,
 938                                          wdev->u.client.ssid_len,
 939                                          wdev->conn_bss_type,
 940                                          IEEE80211_PRIVACY_ANY);
 941                 if (found) {
 942                         /* The same BSS is already updated so use it
 943                          * instead, as it has latest info.
 944                          */
 945                         *bss = found;
 946                 } else {
 947                         /* Update with BSS provided by driver, it will
 948                          * be freshly added and ref cnted, we can free
 949                          * the old one.
 950                          *
 951                          * signal_valid can be false, as we are not
 952                          * expecting the BSS to be found.
 953                          *
 954                          * keep the old timestamp to avoid confusion
 955                          */
 956                         cfg80211_bss_update(rdev, ibss, false,
 957                                             ibss->ts);
 958                 }
 959
 960                 cfg80211_put_bss(wdev->wiphy, tmp);
 961         }
 962 }
 963
 964 /* Consumes bss object(s) one way or another */
 965 void cfg80211_connect_done(struct net_device *dev,
 966                            struct cfg80211_connect_resp_params *params,
 967                            gfp_t gfp)
 968 {
 969         struct wireless_dev *wdev = dev->ieee80211_ptr;
 970         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
 971         struct cfg80211_event *ev;
 972         unsigned long flags;
 973         u8 *next;
 974         size_t link_info_size = 0;
 975         unsigned int link;
 976
 977         for_each_valid_link(params, link) {
 978                 cfg80211_update_link_bss(wdev, &params->links[link].bss);
 979                 link_info_size += params->links[link].bssid ? ETH_ALEN : 0;
 980                 link_info_size += params->links[link].addr ? ETH_ALEN : 0;
 981         }
 982
 983         ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) +
 984                      params->req_ie_len + params->resp_ie_len +
 985                      params->fils.kek_len + params->fils.pmk_len +
 986                      (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
 987                      gfp);
 988
 989         if (!ev) {
 990                 for_each_valid_link(params, link)
 991                         cfg80211_put_bss(wdev->wiphy,
 992                                          params->links[link].bss);
 993                 return;
 994         }
 995
 996         ev->type = EVENT_CONNECT_RESULT;
 997         next = ((u8 *)ev) + sizeof(*ev);
 998         if (params->ap_mld_addr) {
 999                 ev->cr.ap_mld_addr = next;
1000                 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr,
1001                        ETH_ALEN);
1002                 next += ETH_ALEN;
1003         }
1004         if (params->req_ie_len) {
1005                 ev->cr.req_ie = next;
1006                 ev->cr.req_ie_len = params->req_ie_len;
1007                 memcpy((void *)ev->cr.req_ie, params->req_ie,
1008                        params->req_ie_len);
1009                 next += params->req_ie_len;
1010         }
1011         if (params->resp_ie_len) {
1012                 ev->cr.resp_ie = next;
1013                 ev->cr.resp_ie_len = params->resp_ie_len;
1014                 memcpy((void *)ev->cr.resp_ie, params->resp_ie,
1015                        params->resp_ie_len);
1016                 next += params->resp_ie_len;
1017         }
1018         if (params->fils.kek_len) {
1019                 ev->cr.fils.kek = next;
1020                 ev->cr.fils.kek_len = params->fils.kek_len;
1021                 memcpy((void *)ev->cr.fils.kek, params->fils.kek,
1022                        params->fils.kek_len);
1023                 next += params->fils.kek_len;
1024         }
1025         if (params->fils.pmk_len) {
1026                 ev->cr.fils.pmk = next;
1027                 ev->cr.fils.pmk_len = params->fils.pmk_len;
1028                 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk,
1029                        params->fils.pmk_len);
1030                 next += params->fils.pmk_len;
1031         }
1032         if (params->fils.pmkid) {
1033                 ev->cr.fils.pmkid = next;
1034                 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid,
1035                        WLAN_PMKID_LEN);
1036                 next += WLAN_PMKID_LEN;
1037         }
1038         ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num;
1039         if (params->fils.update_erp_next_seq_num)
1040                 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num;
1041         ev->cr.valid_links = params->valid_links;
1042         for_each_valid_link(params, link) {
1043                 if (params->links[link].bss)
1044                         cfg80211_hold_bss(
1045                                 bss_from_pub(params->links[link].bss));
1046                 ev->cr.links[link].bss = params->links[link].bss;
1047
1048                 if (params->links[link].addr) {
1049                         ev->cr.links[link].addr = next;
1050                         memcpy((void *)ev->cr.links[link].addr,
1051                                params->links[link].addr,
1052                                ETH_ALEN);
1053                         next += ETH_ALEN;
1054                 }
1055                 if (params->links[link].bssid) {
1056                         ev->cr.links[link].bssid = next;
1057                         memcpy((void *)ev->cr.links[link].bssid,
1058                                params->links[link].bssid,
1059                                ETH_ALEN);
1060                         next += ETH_ALEN;
1061                 }
1062         }
1063         ev->cr.status = params->status;
1064         ev->cr.timeout_reason = params->timeout_reason;
1065
1066         spin_lock_irqsave(&wdev->event_lock, flags);
1067         list_add_tail(&ev->list, &wdev->event_list);
1068         spin_unlock_irqrestore(&wdev->event_lock, flags);
1069         queue_work(cfg80211_wq, &rdev->event_work);
1070 }
1071 EXPORT_SYMBOL(cfg80211_connect_done);
1072
1073 /* Consumes bss object one way or another */
1074 void __cfg80211_roamed(struct wireless_dev *wdev,
1075                        struct cfg80211_roam_info *info)
1076 {
1077 #ifdef CONFIG_CFG80211_WEXT
1078         union iwreq_data wrqu;
1079 #endif
1080         unsigned int link;
1081         const u8 *connected_addr;
1082
1083         lockdep_assert_wiphy(wdev->wiphy);
1084
1085         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1086                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1087                 goto out;
1088
1089         if (WARN_ON(!wdev->connected))
1090                 goto out;
1091
1092         if (info->valid_links) {
1093                 if (WARN_ON(!info->ap_mld_addr))
1094                         goto out;
1095
1096                 for_each_valid_link(info, link) {
1097                         if (WARN_ON(!info->links[link].addr))
1098                                 goto out;
1099                 }
1100         }
1101
1102         cfg80211_wdev_release_bsses(wdev);
1103
1104         for_each_valid_link(info, link) {
1105                 if (WARN_ON(!info->links[link].bss))
1106                         goto out;
1107         }
1108
1109         memset(wdev->links, 0, sizeof(wdev->links));
1110         wdev->valid_links = info->valid_links;
1111         for_each_valid_link(info, link) {
1112                 cfg80211_hold_bss(bss_from_pub(info->links[link].bss));
1113                 wdev->links[link].client.current_bss =
1114                         bss_from_pub(info->links[link].bss);
1115         }
1116
1117         connected_addr = info->valid_links ?
1118                          info->ap_mld_addr :
1119                          info->links[0].bss->bssid;
1120         ether_addr_copy(wdev->u.client.connected_addr, connected_addr);
1121         if (info->valid_links) {
1122                 for_each_valid_link(info, link)
1123                         memcpy(wdev->links[link].addr, info->links[link].addr,
1124                                ETH_ALEN);
1125         }
1126         wdev->unprot_beacon_reported = 0;
1127         nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy),
1128                             wdev->netdev, info, GFP_KERNEL);
1129
1130 #ifdef CONFIG_CFG80211_WEXT
1131         if (!info->valid_links) {
1132                 if (info->req_ie) {
1133                         memset(&wrqu, 0, sizeof(wrqu));
1134                         wrqu.data.length = info->req_ie_len;
1135                         wireless_send_event(wdev->netdev, IWEVASSOCREQIE,
1136                                             &wrqu, info->req_ie);
1137                 }
1138
1139                 if (info->resp_ie) {
1140                         memset(&wrqu, 0, sizeof(wrqu));
1141                         wrqu.data.length = info->resp_ie_len;
1142                         wireless_send_event(wdev->netdev, IWEVASSOCRESPIE,
1143                                             &wrqu, info->resp_ie);
1144                 }
1145
1146                 memset(&wrqu, 0, sizeof(wrqu));
1147                 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1148                 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN);
1149                 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN);
1150                 wdev->wext.prev_bssid_valid = true;
1151                 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL);
1152         }
1153 #endif
1154
1155         return;
1156 out:
1157         for_each_valid_link(info, link)
1158                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1159 }
1160
1161 /* Consumes info->links.bss object(s) one way or another */
1162 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
1163                      gfp_t gfp)
1164 {
1165         struct wireless_dev *wdev = dev->ieee80211_ptr;
1166         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1167         struct cfg80211_event *ev;
1168         unsigned long flags;
1169         u8 *next;
1170         unsigned int link;
1171         size_t link_info_size = 0;
1172         bool bss_not_found = false;
1173
1174         for_each_valid_link(info, link) {
1175                 link_info_size += info->links[link].addr ? ETH_ALEN : 0;
1176                 link_info_size += info->links[link].bssid ? ETH_ALEN : 0;
1177
1178                 if (info->links[link].bss)
1179                         continue;
1180
1181                 info->links[link].bss =
1182                         cfg80211_get_bss(wdev->wiphy,
1183                                          info->links[link].channel,
1184                                          info->links[link].bssid,
1185                                          wdev->u.client.ssid,
1186                                          wdev->u.client.ssid_len,
1187                                          wdev->conn_bss_type,
1188                                          IEEE80211_PRIVACY_ANY);
1189
1190                 if (!info->links[link].bss) {
1191                         bss_not_found = true;
1192                         break;
1193                 }
1194         }
1195
1196         if (WARN_ON(bss_not_found))
1197                 goto out;
1198
1199         ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len +
1200                      info->fils.kek_len + info->fils.pmk_len +
1201                      (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
1202                      (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp);
1203         if (!ev)
1204                 goto out;
1205
1206         ev->type = EVENT_ROAMED;
1207         next = ((u8 *)ev) + sizeof(*ev);
1208         if (info->req_ie_len) {
1209                 ev->rm.req_ie = next;
1210                 ev->rm.req_ie_len = info->req_ie_len;
1211                 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len);
1212                 next += info->req_ie_len;
1213         }
1214         if (info->resp_ie_len) {
1215                 ev->rm.resp_ie = next;
1216                 ev->rm.resp_ie_len = info->resp_ie_len;
1217                 memcpy((void *)ev->rm.resp_ie, info->resp_ie,
1218                        info->resp_ie_len);
1219                 next += info->resp_ie_len;
1220         }
1221         if (info->fils.kek_len) {
1222                 ev->rm.fils.kek = next;
1223                 ev->rm.fils.kek_len = info->fils.kek_len;
1224                 memcpy((void *)ev->rm.fils.kek, info->fils.kek,
1225                        info->fils.kek_len);
1226                 next += info->fils.kek_len;
1227         }
1228         if (info->fils.pmk_len) {
1229                 ev->rm.fils.pmk = next;
1230                 ev->rm.fils.pmk_len = info->fils.pmk_len;
1231                 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk,
1232                        info->fils.pmk_len);
1233                 next += info->fils.pmk_len;
1234         }
1235         if (info->fils.pmkid) {
1236                 ev->rm.fils.pmkid = next;
1237                 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid,
1238                        WLAN_PMKID_LEN);
1239                 next += WLAN_PMKID_LEN;
1240         }
1241         ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num;
1242         if (info->fils.update_erp_next_seq_num)
1243                 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num;
1244         if (info->ap_mld_addr) {
1245                 ev->rm.ap_mld_addr = next;
1246                 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr,
1247                        ETH_ALEN);
1248                 next += ETH_ALEN;
1249         }
1250         ev->rm.valid_links = info->valid_links;
1251         for_each_valid_link(info, link) {
1252                 ev->rm.links[link].bss = info->links[link].bss;
1253
1254                 if (info->links[link].addr) {
1255                         ev->rm.links[link].addr = next;
1256                         memcpy((void *)ev->rm.links[link].addr,
1257                                info->links[link].addr,
1258                                ETH_ALEN);
1259                         next += ETH_ALEN;
1260                 }
1261
1262                 if (info->links[link].bssid) {
1263                         ev->rm.links[link].bssid = next;
1264                         memcpy((void *)ev->rm.links[link].bssid,
1265                                info->links[link].bssid,
1266                                ETH_ALEN);
1267                         next += ETH_ALEN;
1268                 }
1269         }
1270
1271         spin_lock_irqsave(&wdev->event_lock, flags);
1272         list_add_tail(&ev->list, &wdev->event_list);
1273         spin_unlock_irqrestore(&wdev->event_lock, flags);
1274         queue_work(cfg80211_wq, &rdev->event_work);
1275
1276         return;
1277 out:
1278         for_each_valid_link(info, link)
1279                 cfg80211_put_bss(wdev->wiphy, info->links[link].bss);
1280
1281 }
1282 EXPORT_SYMBOL(cfg80211_roamed);
1283
1284 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr,
1285                                         const u8 *td_bitmap, u8 td_bitmap_len)
1286 {
1287         lockdep_assert_wiphy(wdev->wiphy);
1288
1289         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1290                 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT &&
1291                 wdev->iftype != NL80211_IFTYPE_AP &&
1292                 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1293                 return;
1294
1295         if (wdev->iftype == NL80211_IFTYPE_STATION ||
1296                 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1297                 if (WARN_ON(!wdev->connected) ||
1298                         WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr)))
1299                         return;
1300         }
1301
1302         nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev,
1303                                      peer_addr, td_bitmap, td_bitmap_len);
1304 }
1305
1306 void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
1307                               const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp)
1308 {
1309         struct wireless_dev *wdev = dev->ieee80211_ptr;
1310         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1311         struct cfg80211_event *ev;
1312         unsigned long flags;
1313
1314         if (WARN_ON(!peer_addr))
1315                 return;
1316
1317         ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp);
1318         if (!ev)
1319                 return;
1320
1321         ev->type = EVENT_PORT_AUTHORIZED;
1322         memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN);
1323         ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev);
1324         ev->pa.td_bitmap_len = td_bitmap_len;
1325         memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len);
1326
1327         /*
1328          * Use the wdev event list so that if there are pending
1329          * connected/roamed events, they will be reported first.
1330          */
1331         spin_lock_irqsave(&wdev->event_lock, flags);
1332         list_add_tail(&ev->list, &wdev->event_list);
1333         spin_unlock_irqrestore(&wdev->event_lock, flags);
1334         queue_work(cfg80211_wq, &rdev->event_work);
1335 }
1336 EXPORT_SYMBOL(cfg80211_port_authorized);
1337
1338 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
1339                              size_t ie_len, u16 reason, bool from_ap)
1340 {
1341         struct wireless_dev *wdev = dev->ieee80211_ptr;
1342         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1343         int i;
1344 #ifdef CONFIG_CFG80211_WEXT
1345         union iwreq_data wrqu;
1346 #endif
1347
1348         lockdep_assert_wiphy(wdev->wiphy);
1349
1350         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
1351                     wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
1352                 return;
1353
1354         cfg80211_wdev_release_bsses(wdev);
1355         wdev->connected = false;
1356         wdev->u.client.ssid_len = 0;
1357         wdev->conn_owner_nlportid = 0;
1358         kfree_sensitive(wdev->connect_keys);
1359         wdev->connect_keys = NULL;
1360
1361         nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap);
1362
1363         /* stop critical protocol if supported */
1364         if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) {
1365                 rdev->crit_proto_nlportid = 0;
1366                 rdev_crit_proto_stop(rdev, wdev);
1367         }
1368
1369         /*
1370          * Delete all the keys ... pairwise keys can't really
1371          * exist any more anyway, but default keys might.
1372          */
1373         if (rdev->ops->del_key) {
1374                 int max_key_idx = 5;
1375
1376                 if (wiphy_ext_feature_isset(
1377                             wdev->wiphy,
1378                             NL80211_EXT_FEATURE_BEACON_PROTECTION) ||
1379                     wiphy_ext_feature_isset(
1380                             wdev->wiphy,
1381                             NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
1382                         max_key_idx = 7;
1383                 for (i = 0; i <= max_key_idx; i++)
1384                         rdev_del_key(rdev, dev, -1, i, false, NULL);
1385         }
1386
1387         rdev_set_qos_map(rdev, dev, NULL);
1388
1389 #ifdef CONFIG_CFG80211_WEXT
1390         memset(&wrqu, 0, sizeof(wrqu));
1391         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1392         wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
1393         wdev->wext.connect.ssid_len = 0;
1394 #endif
1395
1396         schedule_work(&cfg80211_disconnect_work);
1397 }
1398
1399 void cfg80211_disconnected(struct net_device *dev, u16 reason,
1400                            const u8 *ie, size_t ie_len,
1401                            bool locally_generated, gfp_t gfp)
1402 {
1403         struct wireless_dev *wdev = dev->ieee80211_ptr;
1404         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1405         struct cfg80211_event *ev;
1406         unsigned long flags;
1407
1408         ev = kzalloc(sizeof(*ev) + ie_len, gfp);
1409         if (!ev)
1410                 return;
1411
1412         ev->type = EVENT_DISCONNECTED;
1413         ev->dc.ie = ((u8 *)ev) + sizeof(*ev);
1414         ev->dc.ie_len = ie_len;
1415         memcpy((void *)ev->dc.ie, ie, ie_len);
1416         ev->dc.reason = reason;
1417         ev->dc.locally_generated = locally_generated;
1418
1419         spin_lock_irqsave(&wdev->event_lock, flags);
1420         list_add_tail(&ev->list, &wdev->event_list);
1421         spin_unlock_irqrestore(&wdev->event_lock, flags);
1422         queue_work(cfg80211_wq, &rdev->event_work);
1423 }
1424 EXPORT_SYMBOL(cfg80211_disconnected);
1425
1426 /*
1427  * API calls for nl80211/wext compatibility code
1428  */
1429 int cfg80211_connect(struct cfg80211_registered_device *rdev,
1430                      struct net_device *dev,
1431                      struct cfg80211_connect_params *connect,
1432                      struct cfg80211_cached_keys *connkeys,
1433                      const u8 *prev_bssid)
1434 {
1435         struct wireless_dev *wdev = dev->ieee80211_ptr;
1436         int err;
1437
1438         lockdep_assert_wiphy(wdev->wiphy);
1439
1440         /*
1441          * If we have an ssid_len, we're trying to connect or are
1442          * already connected, so reject a new SSID unless it's the
1443          * same (which is the case for re-association.)
1444          */
1445         if (wdev->u.client.ssid_len &&
1446             (wdev->u.client.ssid_len != connect->ssid_len ||
1447              memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len)))
1448                 return -EALREADY;
1449
1450         /*
1451          * If connected, reject (re-)association unless prev_bssid
1452          * matches the current BSSID.
1453          */
1454         if (wdev->connected) {
1455                 if (!prev_bssid)
1456                         return -EALREADY;
1457                 if (!ether_addr_equal(prev_bssid,
1458                                       wdev->u.client.connected_addr))
1459                         return -ENOTCONN;
1460         }
1461
1462         /*
1463          * Reject if we're in the process of connecting with WEP,
1464          * this case isn't very interesting and trying to handle
1465          * it would make the code much more complex.
1466          */
1467         if (wdev->connect_keys)
1468                 return -EINPROGRESS;
1469
1470         cfg80211_oper_and_ht_capa(&connect->ht_capa_mask,
1471                                   rdev->wiphy.ht_capa_mod_mask);
1472         cfg80211_oper_and_vht_capa(&connect->vht_capa_mask,
1473                                    rdev->wiphy.vht_capa_mod_mask);
1474
1475         if (connkeys && connkeys->def >= 0) {
1476                 int idx;
1477                 u32 cipher;
1478
1479                 idx = connkeys->def;
1480                 cipher = connkeys->params[idx].cipher;
1481                 /* If given a WEP key we may need it for shared key auth */
1482                 if (cipher == WLAN_CIPHER_SUITE_WEP40 ||
1483                     cipher == WLAN_CIPHER_SUITE_WEP104) {
1484                         connect->key_idx = idx;
1485                         connect->key = connkeys->params[idx].key;
1486                         connect->key_len = connkeys->params[idx].key_len;
1487
1488                         /*
1489                          * If ciphers are not set (e.g. when going through
1490                          * iwconfig), we have to set them appropriately here.
1491                          */
1492                         if (connect->crypto.cipher_group == 0)
1493                                 connect->crypto.cipher_group = cipher;
1494
1495                         if (connect->crypto.n_ciphers_pairwise == 0) {
1496                                 connect->crypto.n_ciphers_pairwise = 1;
1497                                 connect->crypto.ciphers_pairwise[0] = cipher;
1498                         }
1499                 }
1500         } else {
1501                 if (WARN_ON(connkeys))
1502                         return -EINVAL;
1503
1504                 /* connect can point to wdev->wext.connect which
1505                  * can hold key data from a previous connection
1506                  */
1507                 connect->key = NULL;
1508                 connect->key_len = 0;
1509                 connect->key_idx = 0;
1510         }
1511
1512         wdev->connect_keys = connkeys;
1513         memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len);
1514         wdev->u.client.ssid_len = connect->ssid_len;
1515
1516         wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS :
1517                                               IEEE80211_BSS_TYPE_ESS;
1518
1519         if (!rdev->ops->connect)
1520                 err = cfg80211_sme_connect(wdev, connect, prev_bssid);
1521         else
1522                 err = rdev_connect(rdev, dev, connect);
1523
1524         if (err) {
1525                 wdev->connect_keys = NULL;
1526                 /*
1527                  * This could be reassoc getting refused, don't clear
1528                  * ssid_len in that case.
1529                  */
1530                 if (!wdev->connected)
1531                         wdev->u.client.ssid_len = 0;
1532                 return err;
1533         }
1534
1535         return 0;
1536 }
1537
1538 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
1539                         struct net_device *dev, u16 reason, bool wextev)
1540 {
1541         struct wireless_dev *wdev = dev->ieee80211_ptr;
1542         int err = 0;
1543
1544         lockdep_assert_wiphy(wdev->wiphy);
1545
1546         kfree_sensitive(wdev->connect_keys);
1547         wdev->connect_keys = NULL;
1548
1549         wdev->conn_owner_nlportid = 0;
1550
1551         if (wdev->conn)
1552                 err = cfg80211_sme_disconnect(wdev, reason);
1553         else if (!rdev->ops->disconnect)
1554                 cfg80211_mlme_down(rdev, dev);
1555         else if (wdev->u.client.ssid_len)
1556                 err = rdev_disconnect(rdev, dev, reason);
1557
1558         /*
1559          * Clear ssid_len unless we actually were fully connected,
1560          * in which case cfg80211_disconnected() will take care of
1561          * this later.
1562          */
1563         if (!wdev->connected)
1564                 wdev->u.client.ssid_len = 0;
1565
1566         return err;
1567 }
1568
1569 /*
1570  * Used to clean up after the connection / connection attempt owner socket
1571  * disconnects
1572  */
1573 void cfg80211_autodisconnect_wk(struct work_struct *work)
1574 {
1575         struct wireless_dev *wdev =
1576                 container_of(work, struct wireless_dev, disconnect_wk);
1577         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1578
1579         wiphy_lock(wdev->wiphy);
1580
1581         if (wdev->conn_owner_nlportid) {
1582                 switch (wdev->iftype) {
1583                 case NL80211_IFTYPE_ADHOC:
1584                         cfg80211_leave_ibss(rdev, wdev->netdev, false);
1585                         break;
1586                 case NL80211_IFTYPE_AP:
1587                 case NL80211_IFTYPE_P2P_GO:
1588                         cfg80211_stop_ap(rdev, wdev->netdev, -1, false);
1589                         break;
1590                 case NL80211_IFTYPE_MESH_POINT:
1591                         cfg80211_leave_mesh(rdev, wdev->netdev);
1592                         break;
1593                 case NL80211_IFTYPE_STATION:
1594                 case NL80211_IFTYPE_P2P_CLIENT:
1595                         /*
1596                          * Use disconnect_bssid if still connecting and
1597                          * ops->disconnect not implemented.  Otherwise we can
1598                          * use cfg80211_disconnect.
1599                          */
1600                         if (rdev->ops->disconnect || wdev->connected)
1601                                 cfg80211_disconnect(rdev, wdev->netdev,
1602                                                     WLAN_REASON_DEAUTH_LEAVING,
1603                                                     true);
1604                         else
1605                                 cfg80211_mlme_deauth(rdev, wdev->netdev,
1606                                                      wdev->disconnect_bssid,
1607                                                      NULL, 0,
1608                                                      WLAN_REASON_DEAUTH_LEAVING,
1609                                                      false);
1610                         break;
1611                 default:
1612                         break;
1613                 }
1614         }
1615
1616         wiphy_unlock(wdev->wiphy);
1617 }