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 Intel Corporation. All rights reserved. 9 * Copyright 2017 Intel Deutschland GmbH 10 */ 11 12 #include <linux/etherdevice.h> 13 #include <linux/if_arp.h> 14 #include <linux/slab.h> 15 #include <linux/workqueue.h> 16 #include <linux/wireless.h> 17 #include <linux/export.h> 18 #include <net/iw_handler.h> 19 #include <net/cfg80211.h> 20 #include <net/rtnetlink.h> 21 #include "nl80211.h" 22 #include "reg.h" 23 #include "rdev-ops.h" 24 25 /* 26 * Software SME in cfg80211, using auth/assoc/deauth calls to the 27 * driver. This is for implementing nl80211's connect/disconnect 28 * and wireless extensions (if configured.) 29 */ 30 31 struct cfg80211_conn { 32 struct cfg80211_connect_params params; 33 /* these are sub-states of the _CONNECTING sme_state */ 34 enum { 35 CFG80211_CONN_SCANNING, 36 CFG80211_CONN_SCAN_AGAIN, 37 CFG80211_CONN_AUTHENTICATE_NEXT, 38 CFG80211_CONN_AUTHENTICATING, 39 CFG80211_CONN_AUTH_FAILED_TIMEOUT, 40 CFG80211_CONN_ASSOCIATE_NEXT, 41 CFG80211_CONN_ASSOCIATING, 42 CFG80211_CONN_ASSOC_FAILED, 43 CFG80211_CONN_ASSOC_FAILED_TIMEOUT, 44 CFG80211_CONN_DEAUTH, 45 CFG80211_CONN_ABANDON, 46 CFG80211_CONN_CONNECTED, 47 } state; 48 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; 49 const u8 *ie; 50 size_t ie_len; 51 bool auto_auth, prev_bssid_valid; 52 }; 53 54 static void cfg80211_sme_free(struct wireless_dev *wdev) 55 { 56 if (!wdev->conn) 57 return; 58 59 kfree(wdev->conn->ie); 60 kfree(wdev->conn); 61 wdev->conn = NULL; 62 } 63 64 static int cfg80211_conn_scan(struct wireless_dev *wdev) 65 { 66 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 67 struct cfg80211_scan_request *request; 68 int n_channels, err; 69 70 ASSERT_WDEV_LOCK(wdev); 71 72 if (rdev->scan_req || rdev->scan_msg) 73 return -EBUSY; 74 75 if (wdev->conn->params.channel) 76 n_channels = 1; 77 else 78 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy); 79 80 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 81 sizeof(request->channels[0]) * n_channels, 82 GFP_KERNEL); 83 if (!request) 84 return -ENOMEM; 85 86 if (wdev->conn->params.channel) { 87 enum nl80211_band band = wdev->conn->params.channel->band; 88 struct ieee80211_supported_band *sband = 89 wdev->wiphy->bands[band]; 90 91 if (!sband) { 92 kfree(request); 93 return -EINVAL; 94 } 95 request->channels[0] = wdev->conn->params.channel; 96 request->rates[band] = (1 << sband->n_bitrates) - 1; 97 } else { 98 int i = 0, j; 99 enum nl80211_band band; 100 struct ieee80211_supported_band *bands; 101 struct ieee80211_channel *channel; 102 103 for (band = 0; band < NUM_NL80211_BANDS; band++) { 104 bands = wdev->wiphy->bands[band]; 105 if (!bands) 106 continue; 107 for (j = 0; j < bands->n_channels; j++) { 108 channel = &bands->channels[j]; 109 if (channel->flags & IEEE80211_CHAN_DISABLED) 110 continue; 111 request->channels[i++] = channel; 112 } 113 request->rates[band] = (1 << bands->n_bitrates) - 1; 114 } 115 n_channels = i; 116 } 117 request->n_channels = n_channels; 118 request->ssids = (void *)&request->channels[n_channels]; 119 request->n_ssids = 1; 120 121 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 122 wdev->conn->params.ssid_len); 123 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 124 125 eth_broadcast_addr(request->bssid); 126 127 request->wdev = wdev; 128 request->wiphy = &rdev->wiphy; 129 request->scan_start = jiffies; 130 131 rdev->scan_req = request; 132 133 err = rdev_scan(rdev, request); 134 if (!err) { 135 wdev->conn->state = CFG80211_CONN_SCANNING; 136 nl80211_send_scan_start(rdev, wdev); 137 dev_hold(wdev->netdev); 138 } else { 139 rdev->scan_req = NULL; 140 kfree(request); 141 } 142 return err; 143 } 144 145 static int cfg80211_conn_do_work(struct wireless_dev *wdev, 146 enum nl80211_timeout_reason *treason) 147 { 148 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 149 struct cfg80211_connect_params *params; 150 struct cfg80211_assoc_request req = {}; 151 int err; 152 153 ASSERT_WDEV_LOCK(wdev); 154 155 if (!wdev->conn) 156 return 0; 157 158 params = &wdev->conn->params; 159 160 switch (wdev->conn->state) { 161 case CFG80211_CONN_SCANNING: 162 /* didn't find it during scan ... */ 163 return -ENOENT; 164 case CFG80211_CONN_SCAN_AGAIN: 165 return cfg80211_conn_scan(wdev); 166 case CFG80211_CONN_AUTHENTICATE_NEXT: 167 if (WARN_ON(!rdev->ops->auth)) 168 return -EOPNOTSUPP; 169 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 170 return cfg80211_mlme_auth(rdev, wdev->netdev, 171 params->channel, params->auth_type, 172 params->bssid, 173 params->ssid, params->ssid_len, 174 NULL, 0, 175 params->key, params->key_len, 176 params->key_idx, NULL, 0); 177 case CFG80211_CONN_AUTH_FAILED_TIMEOUT: 178 *treason = NL80211_TIMEOUT_AUTH; 179 return -ENOTCONN; 180 case CFG80211_CONN_ASSOCIATE_NEXT: 181 if (WARN_ON(!rdev->ops->assoc)) 182 return -EOPNOTSUPP; 183 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 184 if (wdev->conn->prev_bssid_valid) 185 req.prev_bssid = wdev->conn->prev_bssid; 186 req.ie = params->ie; 187 req.ie_len = params->ie_len; 188 req.use_mfp = params->mfp != NL80211_MFP_NO; 189 req.crypto = params->crypto; 190 req.flags = params->flags; 191 req.ht_capa = params->ht_capa; 192 req.ht_capa_mask = params->ht_capa_mask; 193 req.vht_capa = params->vht_capa; 194 req.vht_capa_mask = params->vht_capa_mask; 195 196 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 197 params->bssid, params->ssid, 198 params->ssid_len, &req); 199 if (err) 200 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 201 NULL, 0, 202 WLAN_REASON_DEAUTH_LEAVING, 203 false); 204 return err; 205 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT: 206 *treason = NL80211_TIMEOUT_ASSOC; 207 fallthrough; 208 case CFG80211_CONN_ASSOC_FAILED: 209 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 210 NULL, 0, 211 WLAN_REASON_DEAUTH_LEAVING, false); 212 return -ENOTCONN; 213 case CFG80211_CONN_DEAUTH: 214 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 215 NULL, 0, 216 WLAN_REASON_DEAUTH_LEAVING, false); 217 fallthrough; 218 case CFG80211_CONN_ABANDON: 219 /* free directly, disconnected event already sent */ 220 cfg80211_sme_free(wdev); 221 return 0; 222 default: 223 return 0; 224 } 225 } 226 227 void cfg80211_conn_work(struct work_struct *work) 228 { 229 struct cfg80211_registered_device *rdev = 230 container_of(work, struct cfg80211_registered_device, conn_work); 231 struct wireless_dev *wdev; 232 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 233 enum nl80211_timeout_reason treason; 234 235 wiphy_lock(&rdev->wiphy); 236 237 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 238 if (!wdev->netdev) 239 continue; 240 241 wdev_lock(wdev); 242 if (!netif_running(wdev->netdev)) { 243 wdev_unlock(wdev); 244 continue; 245 } 246 if (!wdev->conn || 247 wdev->conn->state == CFG80211_CONN_CONNECTED) { 248 wdev_unlock(wdev); 249 continue; 250 } 251 if (wdev->conn->params.bssid) { 252 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 253 bssid = bssid_buf; 254 } 255 treason = NL80211_TIMEOUT_UNSPECIFIED; 256 if (cfg80211_conn_do_work(wdev, &treason)) { 257 struct cfg80211_connect_resp_params cr; 258 259 memset(&cr, 0, sizeof(cr)); 260 cr.status = -1; 261 cr.bssid = bssid; 262 cr.timeout_reason = treason; 263 __cfg80211_connect_result(wdev->netdev, &cr, false); 264 } 265 wdev_unlock(wdev); 266 } 267 268 wiphy_unlock(&rdev->wiphy); 269 } 270 271 /* Returned bss is reference counted and must be cleaned up appropriately. */ 272 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 273 { 274 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 275 struct cfg80211_bss *bss; 276 277 ASSERT_WDEV_LOCK(wdev); 278 279 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 280 wdev->conn->params.bssid, 281 wdev->conn->params.ssid, 282 wdev->conn->params.ssid_len, 283 wdev->conn_bss_type, 284 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 285 if (!bss) 286 return NULL; 287 288 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 289 wdev->conn->params.bssid = wdev->conn->bssid; 290 wdev->conn->params.channel = bss->channel; 291 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 292 schedule_work(&rdev->conn_work); 293 294 return bss; 295 } 296 297 static void __cfg80211_sme_scan_done(struct net_device *dev) 298 { 299 struct wireless_dev *wdev = dev->ieee80211_ptr; 300 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 301 struct cfg80211_bss *bss; 302 303 ASSERT_WDEV_LOCK(wdev); 304 305 if (!wdev->conn) 306 return; 307 308 if (wdev->conn->state != CFG80211_CONN_SCANNING && 309 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 310 return; 311 312 bss = cfg80211_get_conn_bss(wdev); 313 if (bss) 314 cfg80211_put_bss(&rdev->wiphy, bss); 315 else 316 schedule_work(&rdev->conn_work); 317 } 318 319 void cfg80211_sme_scan_done(struct net_device *dev) 320 { 321 struct wireless_dev *wdev = dev->ieee80211_ptr; 322 323 wdev_lock(wdev); 324 __cfg80211_sme_scan_done(dev); 325 wdev_unlock(wdev); 326 } 327 328 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 329 { 330 struct wiphy *wiphy = wdev->wiphy; 331 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 332 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 333 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 334 335 ASSERT_WDEV_LOCK(wdev); 336 337 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 338 return; 339 340 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 341 wdev->conn->auto_auth && 342 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 343 /* select automatically between only open, shared, leap */ 344 switch (wdev->conn->params.auth_type) { 345 case NL80211_AUTHTYPE_OPEN_SYSTEM: 346 if (wdev->connect_keys) 347 wdev->conn->params.auth_type = 348 NL80211_AUTHTYPE_SHARED_KEY; 349 else 350 wdev->conn->params.auth_type = 351 NL80211_AUTHTYPE_NETWORK_EAP; 352 break; 353 case NL80211_AUTHTYPE_SHARED_KEY: 354 wdev->conn->params.auth_type = 355 NL80211_AUTHTYPE_NETWORK_EAP; 356 break; 357 default: 358 /* huh? */ 359 wdev->conn->params.auth_type = 360 NL80211_AUTHTYPE_OPEN_SYSTEM; 361 break; 362 } 363 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 364 schedule_work(&rdev->conn_work); 365 } else if (status_code != WLAN_STATUS_SUCCESS) { 366 struct cfg80211_connect_resp_params cr; 367 368 memset(&cr, 0, sizeof(cr)); 369 cr.status = status_code; 370 cr.bssid = mgmt->bssid; 371 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 372 __cfg80211_connect_result(wdev->netdev, &cr, false); 373 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 374 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 375 schedule_work(&rdev->conn_work); 376 } 377 } 378 379 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 380 { 381 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 382 383 if (!wdev->conn) 384 return false; 385 386 if (status == WLAN_STATUS_SUCCESS) { 387 wdev->conn->state = CFG80211_CONN_CONNECTED; 388 return false; 389 } 390 391 if (wdev->conn->prev_bssid_valid) { 392 /* 393 * Some stupid APs don't accept reassoc, so we 394 * need to fall back to trying regular assoc; 395 * return true so no event is sent to userspace. 396 */ 397 wdev->conn->prev_bssid_valid = false; 398 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 399 schedule_work(&rdev->conn_work); 400 return true; 401 } 402 403 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 404 schedule_work(&rdev->conn_work); 405 return false; 406 } 407 408 void cfg80211_sme_deauth(struct wireless_dev *wdev) 409 { 410 cfg80211_sme_free(wdev); 411 } 412 413 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 414 { 415 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 416 417 if (!wdev->conn) 418 return; 419 420 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 421 schedule_work(&rdev->conn_work); 422 } 423 424 void cfg80211_sme_disassoc(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_DEAUTH; 432 schedule_work(&rdev->conn_work); 433 } 434 435 void cfg80211_sme_assoc_timeout(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_ASSOC_FAILED_TIMEOUT; 443 schedule_work(&rdev->conn_work); 444 } 445 446 void cfg80211_sme_abandon_assoc(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_ABANDON; 454 schedule_work(&rdev->conn_work); 455 } 456 457 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 458 const u8 *ies, size_t ies_len, 459 const u8 **out_ies, size_t *out_ies_len) 460 { 461 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 462 u8 *buf; 463 size_t offs; 464 465 if (!rdev->wiphy.extended_capabilities_len || 466 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 467 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 468 if (!*out_ies) 469 return -ENOMEM; 470 *out_ies_len = ies_len; 471 return 0; 472 } 473 474 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 475 GFP_KERNEL); 476 if (!buf) 477 return -ENOMEM; 478 479 if (ies_len) { 480 static const u8 before_extcapa[] = { 481 /* not listing IEs expected to be created by driver */ 482 WLAN_EID_RSN, 483 WLAN_EID_QOS_CAPA, 484 WLAN_EID_RRM_ENABLED_CAPABILITIES, 485 WLAN_EID_MOBILITY_DOMAIN, 486 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 487 WLAN_EID_BSS_COEX_2040, 488 }; 489 490 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 491 ARRAY_SIZE(before_extcapa), 0); 492 memcpy(buf, ies, offs); 493 /* leave a whole for extended capabilities IE */ 494 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 495 ies + offs, ies_len - offs); 496 } else { 497 offs = 0; 498 } 499 500 /* place extended capabilities IE (with only driver capabilities) */ 501 buf[offs] = WLAN_EID_EXT_CAPABILITY; 502 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 503 memcpy(buf + offs + 2, 504 rdev->wiphy.extended_capabilities, 505 rdev->wiphy.extended_capabilities_len); 506 507 *out_ies = buf; 508 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 509 510 return 0; 511 } 512 513 static int cfg80211_sme_connect(struct wireless_dev *wdev, 514 struct cfg80211_connect_params *connect, 515 const u8 *prev_bssid) 516 { 517 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 518 struct cfg80211_bss *bss; 519 int err; 520 521 if (!rdev->ops->auth || !rdev->ops->assoc) 522 return -EOPNOTSUPP; 523 524 if (wdev->current_bss) { 525 cfg80211_unhold_bss(wdev->current_bss); 526 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 527 wdev->current_bss = NULL; 528 529 cfg80211_sme_free(wdev); 530 } 531 532 if (wdev->conn) 533 return -EINPROGRESS; 534 535 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 536 if (!wdev->conn) 537 return -ENOMEM; 538 539 /* 540 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 541 */ 542 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 543 if (connect->bssid) { 544 wdev->conn->params.bssid = wdev->conn->bssid; 545 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 546 } 547 548 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 549 &wdev->conn->ie, 550 &wdev->conn->params.ie_len)) { 551 kfree(wdev->conn); 552 wdev->conn = NULL; 553 return -ENOMEM; 554 } 555 wdev->conn->params.ie = wdev->conn->ie; 556 557 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 558 wdev->conn->auto_auth = true; 559 /* start with open system ... should mostly work */ 560 wdev->conn->params.auth_type = 561 NL80211_AUTHTYPE_OPEN_SYSTEM; 562 } else { 563 wdev->conn->auto_auth = false; 564 } 565 566 wdev->conn->params.ssid = wdev->ssid; 567 wdev->conn->params.ssid_len = wdev->ssid_len; 568 569 /* see if we have the bss already */ 570 bss = cfg80211_get_conn_bss(wdev); 571 572 if (prev_bssid) { 573 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 574 wdev->conn->prev_bssid_valid = true; 575 } 576 577 /* we're good if we have a matching bss struct */ 578 if (bss) { 579 enum nl80211_timeout_reason treason; 580 581 err = cfg80211_conn_do_work(wdev, &treason); 582 cfg80211_put_bss(wdev->wiphy, bss); 583 } else { 584 /* otherwise we'll need to scan for the AP first */ 585 err = cfg80211_conn_scan(wdev); 586 587 /* 588 * If we can't scan right now, then we need to scan again 589 * after the current scan finished, since the parameters 590 * changed (unless we find a good AP anyway). 591 */ 592 if (err == -EBUSY) { 593 err = 0; 594 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 595 } 596 } 597 598 if (err) 599 cfg80211_sme_free(wdev); 600 601 return err; 602 } 603 604 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 605 { 606 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 607 int err; 608 609 if (!wdev->conn) 610 return 0; 611 612 if (!rdev->ops->deauth) 613 return -EOPNOTSUPP; 614 615 if (wdev->conn->state == CFG80211_CONN_SCANNING || 616 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 617 err = 0; 618 goto out; 619 } 620 621 /* wdev->conn->params.bssid must be set if > SCANNING */ 622 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 623 wdev->conn->params.bssid, 624 NULL, 0, reason, false); 625 out: 626 cfg80211_sme_free(wdev); 627 return err; 628 } 629 630 /* 631 * code shared for in-device and software SME 632 */ 633 634 static bool cfg80211_is_all_idle(void) 635 { 636 struct cfg80211_registered_device *rdev; 637 struct wireless_dev *wdev; 638 bool is_all_idle = true; 639 640 /* 641 * All devices must be idle as otherwise if you are actively 642 * scanning some new beacon hints could be learned and would 643 * count as new regulatory hints. 644 * Also if there is any other active beaconing interface we 645 * need not issue a disconnect hint and reset any info such 646 * as chan dfs state, etc. 647 */ 648 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 649 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 650 wdev_lock(wdev); 651 if (wdev->conn || wdev->current_bss || 652 cfg80211_beaconing_iface_active(wdev)) 653 is_all_idle = false; 654 wdev_unlock(wdev); 655 } 656 } 657 658 return is_all_idle; 659 } 660 661 static void disconnect_work(struct work_struct *work) 662 { 663 rtnl_lock(); 664 if (cfg80211_is_all_idle()) 665 regulatory_hint_disconnect(); 666 rtnl_unlock(); 667 } 668 669 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 670 671 672 /* 673 * API calls for drivers implementing connect/disconnect and 674 * SME event handling 675 */ 676 677 /* This method must consume bss one way or another */ 678 void __cfg80211_connect_result(struct net_device *dev, 679 struct cfg80211_connect_resp_params *cr, 680 bool wextev) 681 { 682 struct wireless_dev *wdev = dev->ieee80211_ptr; 683 const struct element *country_elem; 684 const u8 *country_data; 685 u8 country_datalen; 686 #ifdef CONFIG_CFG80211_WEXT 687 union iwreq_data wrqu; 688 #endif 689 690 ASSERT_WDEV_LOCK(wdev); 691 692 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 693 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 694 cfg80211_put_bss(wdev->wiphy, cr->bss); 695 return; 696 } 697 698 wdev->unprot_beacon_reported = 0; 699 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 700 GFP_KERNEL); 701 702 #ifdef CONFIG_CFG80211_WEXT 703 if (wextev) { 704 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 705 memset(&wrqu, 0, sizeof(wrqu)); 706 wrqu.data.length = cr->req_ie_len; 707 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 708 cr->req_ie); 709 } 710 711 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 712 memset(&wrqu, 0, sizeof(wrqu)); 713 wrqu.data.length = cr->resp_ie_len; 714 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 715 cr->resp_ie); 716 } 717 718 memset(&wrqu, 0, sizeof(wrqu)); 719 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 720 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) { 721 memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN); 722 memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN); 723 wdev->wext.prev_bssid_valid = true; 724 } 725 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 726 } 727 #endif 728 729 if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) { 730 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 731 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid, 732 wdev->ssid, wdev->ssid_len, 733 wdev->conn_bss_type, 734 IEEE80211_PRIVACY_ANY); 735 if (cr->bss) 736 cfg80211_hold_bss(bss_from_pub(cr->bss)); 737 } 738 739 if (wdev->current_bss) { 740 cfg80211_unhold_bss(wdev->current_bss); 741 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 742 wdev->current_bss = NULL; 743 } 744 745 if (cr->status != WLAN_STATUS_SUCCESS) { 746 kfree_sensitive(wdev->connect_keys); 747 wdev->connect_keys = NULL; 748 wdev->ssid_len = 0; 749 wdev->conn_owner_nlportid = 0; 750 if (cr->bss) { 751 cfg80211_unhold_bss(bss_from_pub(cr->bss)); 752 cfg80211_put_bss(wdev->wiphy, cr->bss); 753 } 754 cfg80211_sme_free(wdev); 755 return; 756 } 757 758 if (WARN_ON(!cr->bss)) 759 return; 760 761 wdev->current_bss = bss_from_pub(cr->bss); 762 763 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP)) 764 cfg80211_upload_connect_keys(wdev); 765 766 rcu_read_lock(); 767 country_elem = ieee80211_bss_get_elem(cr->bss, WLAN_EID_COUNTRY); 768 if (!country_elem) { 769 rcu_read_unlock(); 770 return; 771 } 772 773 country_datalen = country_elem->datalen; 774 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 775 rcu_read_unlock(); 776 777 if (!country_data) 778 return; 779 780 regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band, 781 country_data, country_datalen); 782 kfree(country_data); 783 } 784 785 /* Consumes bss object one way or another */ 786 void cfg80211_connect_done(struct net_device *dev, 787 struct cfg80211_connect_resp_params *params, 788 gfp_t gfp) 789 { 790 struct wireless_dev *wdev = dev->ieee80211_ptr; 791 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 792 struct cfg80211_event *ev; 793 unsigned long flags; 794 u8 *next; 795 796 if (params->bss) { 797 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss); 798 799 if (list_empty(&ibss->list)) { 800 struct cfg80211_bss *found = NULL, *tmp = params->bss; 801 802 found = cfg80211_get_bss(wdev->wiphy, NULL, 803 params->bss->bssid, 804 wdev->ssid, wdev->ssid_len, 805 wdev->conn_bss_type, 806 IEEE80211_PRIVACY_ANY); 807 if (found) { 808 /* The same BSS is already updated so use it 809 * instead, as it has latest info. 810 */ 811 params->bss = found; 812 } else { 813 /* Update with BSS provided by driver, it will 814 * be freshly added and ref cnted, we can free 815 * the old one. 816 * 817 * signal_valid can be false, as we are not 818 * expecting the BSS to be found. 819 * 820 * keep the old timestamp to avoid confusion 821 */ 822 cfg80211_bss_update(rdev, ibss, false, 823 ibss->ts); 824 } 825 826 cfg80211_put_bss(wdev->wiphy, tmp); 827 } 828 } 829 830 ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) + 831 params->req_ie_len + params->resp_ie_len + 832 params->fils.kek_len + params->fils.pmk_len + 833 (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 834 if (!ev) { 835 cfg80211_put_bss(wdev->wiphy, params->bss); 836 return; 837 } 838 839 ev->type = EVENT_CONNECT_RESULT; 840 next = ((u8 *)ev) + sizeof(*ev); 841 if (params->bssid) { 842 ev->cr.bssid = next; 843 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN); 844 next += ETH_ALEN; 845 } 846 if (params->req_ie_len) { 847 ev->cr.req_ie = next; 848 ev->cr.req_ie_len = params->req_ie_len; 849 memcpy((void *)ev->cr.req_ie, params->req_ie, 850 params->req_ie_len); 851 next += params->req_ie_len; 852 } 853 if (params->resp_ie_len) { 854 ev->cr.resp_ie = next; 855 ev->cr.resp_ie_len = params->resp_ie_len; 856 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 857 params->resp_ie_len); 858 next += params->resp_ie_len; 859 } 860 if (params->fils.kek_len) { 861 ev->cr.fils.kek = next; 862 ev->cr.fils.kek_len = params->fils.kek_len; 863 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 864 params->fils.kek_len); 865 next += params->fils.kek_len; 866 } 867 if (params->fils.pmk_len) { 868 ev->cr.fils.pmk = next; 869 ev->cr.fils.pmk_len = params->fils.pmk_len; 870 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 871 params->fils.pmk_len); 872 next += params->fils.pmk_len; 873 } 874 if (params->fils.pmkid) { 875 ev->cr.fils.pmkid = next; 876 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 877 WLAN_PMKID_LEN); 878 next += WLAN_PMKID_LEN; 879 } 880 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 881 if (params->fils.update_erp_next_seq_num) 882 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 883 if (params->bss) 884 cfg80211_hold_bss(bss_from_pub(params->bss)); 885 ev->cr.bss = params->bss; 886 ev->cr.status = params->status; 887 ev->cr.timeout_reason = params->timeout_reason; 888 889 spin_lock_irqsave(&wdev->event_lock, flags); 890 list_add_tail(&ev->list, &wdev->event_list); 891 spin_unlock_irqrestore(&wdev->event_lock, flags); 892 queue_work(cfg80211_wq, &rdev->event_work); 893 } 894 EXPORT_SYMBOL(cfg80211_connect_done); 895 896 /* Consumes bss object one way or another */ 897 void __cfg80211_roamed(struct wireless_dev *wdev, 898 struct cfg80211_roam_info *info) 899 { 900 #ifdef CONFIG_CFG80211_WEXT 901 union iwreq_data wrqu; 902 #endif 903 ASSERT_WDEV_LOCK(wdev); 904 905 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 906 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 907 goto out; 908 909 if (WARN_ON(!wdev->current_bss)) 910 goto out; 911 912 cfg80211_unhold_bss(wdev->current_bss); 913 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 914 wdev->current_bss = NULL; 915 916 if (WARN_ON(!info->bss)) 917 return; 918 919 cfg80211_hold_bss(bss_from_pub(info->bss)); 920 wdev->current_bss = bss_from_pub(info->bss); 921 922 wdev->unprot_beacon_reported = 0; 923 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 924 wdev->netdev, info, GFP_KERNEL); 925 926 #ifdef CONFIG_CFG80211_WEXT 927 if (info->req_ie) { 928 memset(&wrqu, 0, sizeof(wrqu)); 929 wrqu.data.length = info->req_ie_len; 930 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 931 &wrqu, info->req_ie); 932 } 933 934 if (info->resp_ie) { 935 memset(&wrqu, 0, sizeof(wrqu)); 936 wrqu.data.length = info->resp_ie_len; 937 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 938 &wrqu, info->resp_ie); 939 } 940 941 memset(&wrqu, 0, sizeof(wrqu)); 942 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 943 memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN); 944 memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN); 945 wdev->wext.prev_bssid_valid = true; 946 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 947 #endif 948 949 return; 950 out: 951 cfg80211_put_bss(wdev->wiphy, info->bss); 952 } 953 954 /* Consumes info->bss object one way or another */ 955 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 956 gfp_t gfp) 957 { 958 struct wireless_dev *wdev = dev->ieee80211_ptr; 959 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 960 struct cfg80211_event *ev; 961 unsigned long flags; 962 u8 *next; 963 964 if (!info->bss) { 965 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel, 966 info->bssid, wdev->ssid, 967 wdev->ssid_len, 968 wdev->conn_bss_type, 969 IEEE80211_PRIVACY_ANY); 970 } 971 972 if (WARN_ON(!info->bss)) 973 return; 974 975 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 976 info->fils.kek_len + info->fils.pmk_len + 977 (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 978 if (!ev) { 979 cfg80211_put_bss(wdev->wiphy, info->bss); 980 return; 981 } 982 983 ev->type = EVENT_ROAMED; 984 next = ((u8 *)ev) + sizeof(*ev); 985 if (info->req_ie_len) { 986 ev->rm.req_ie = next; 987 ev->rm.req_ie_len = info->req_ie_len; 988 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 989 next += info->req_ie_len; 990 } 991 if (info->resp_ie_len) { 992 ev->rm.resp_ie = next; 993 ev->rm.resp_ie_len = info->resp_ie_len; 994 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 995 info->resp_ie_len); 996 next += info->resp_ie_len; 997 } 998 if (info->fils.kek_len) { 999 ev->rm.fils.kek = next; 1000 ev->rm.fils.kek_len = info->fils.kek_len; 1001 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1002 info->fils.kek_len); 1003 next += info->fils.kek_len; 1004 } 1005 if (info->fils.pmk_len) { 1006 ev->rm.fils.pmk = next; 1007 ev->rm.fils.pmk_len = info->fils.pmk_len; 1008 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1009 info->fils.pmk_len); 1010 next += info->fils.pmk_len; 1011 } 1012 if (info->fils.pmkid) { 1013 ev->rm.fils.pmkid = next; 1014 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1015 WLAN_PMKID_LEN); 1016 next += WLAN_PMKID_LEN; 1017 } 1018 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1019 if (info->fils.update_erp_next_seq_num) 1020 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1021 ev->rm.bss = info->bss; 1022 1023 spin_lock_irqsave(&wdev->event_lock, flags); 1024 list_add_tail(&ev->list, &wdev->event_list); 1025 spin_unlock_irqrestore(&wdev->event_lock, flags); 1026 queue_work(cfg80211_wq, &rdev->event_work); 1027 } 1028 EXPORT_SYMBOL(cfg80211_roamed); 1029 1030 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid) 1031 { 1032 ASSERT_WDEV_LOCK(wdev); 1033 1034 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) 1035 return; 1036 1037 if (WARN_ON(!wdev->current_bss) || 1038 WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) 1039 return; 1040 1041 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1042 bssid); 1043 } 1044 1045 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1046 gfp_t gfp) 1047 { 1048 struct wireless_dev *wdev = dev->ieee80211_ptr; 1049 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1050 struct cfg80211_event *ev; 1051 unsigned long flags; 1052 1053 if (WARN_ON(!bssid)) 1054 return; 1055 1056 ev = kzalloc(sizeof(*ev), gfp); 1057 if (!ev) 1058 return; 1059 1060 ev->type = EVENT_PORT_AUTHORIZED; 1061 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1062 1063 /* 1064 * Use the wdev event list so that if there are pending 1065 * connected/roamed events, they will be reported first. 1066 */ 1067 spin_lock_irqsave(&wdev->event_lock, flags); 1068 list_add_tail(&ev->list, &wdev->event_list); 1069 spin_unlock_irqrestore(&wdev->event_lock, flags); 1070 queue_work(cfg80211_wq, &rdev->event_work); 1071 } 1072 EXPORT_SYMBOL(cfg80211_port_authorized); 1073 1074 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1075 size_t ie_len, u16 reason, bool from_ap) 1076 { 1077 struct wireless_dev *wdev = dev->ieee80211_ptr; 1078 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1079 int i; 1080 #ifdef CONFIG_CFG80211_WEXT 1081 union iwreq_data wrqu; 1082 #endif 1083 1084 ASSERT_WDEV_LOCK(wdev); 1085 1086 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1087 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1088 return; 1089 1090 if (wdev->current_bss) { 1091 cfg80211_unhold_bss(wdev->current_bss); 1092 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1093 } 1094 1095 wdev->current_bss = NULL; 1096 wdev->ssid_len = 0; 1097 wdev->conn_owner_nlportid = 0; 1098 kfree_sensitive(wdev->connect_keys); 1099 wdev->connect_keys = NULL; 1100 1101 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1102 1103 /* stop critical protocol if supported */ 1104 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1105 rdev->crit_proto_nlportid = 0; 1106 rdev_crit_proto_stop(rdev, wdev); 1107 } 1108 1109 /* 1110 * Delete all the keys ... pairwise keys can't really 1111 * exist any more anyway, but default keys might. 1112 */ 1113 if (rdev->ops->del_key) { 1114 int max_key_idx = 5; 1115 1116 if (wiphy_ext_feature_isset( 1117 wdev->wiphy, 1118 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1119 wiphy_ext_feature_isset( 1120 wdev->wiphy, 1121 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1122 max_key_idx = 7; 1123 for (i = 0; i <= max_key_idx; i++) 1124 rdev_del_key(rdev, dev, i, false, NULL); 1125 } 1126 1127 rdev_set_qos_map(rdev, dev, NULL); 1128 1129 #ifdef CONFIG_CFG80211_WEXT 1130 memset(&wrqu, 0, sizeof(wrqu)); 1131 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1132 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1133 wdev->wext.connect.ssid_len = 0; 1134 #endif 1135 1136 schedule_work(&cfg80211_disconnect_work); 1137 } 1138 1139 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1140 const u8 *ie, size_t ie_len, 1141 bool locally_generated, gfp_t gfp) 1142 { 1143 struct wireless_dev *wdev = dev->ieee80211_ptr; 1144 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1145 struct cfg80211_event *ev; 1146 unsigned long flags; 1147 1148 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1149 if (!ev) 1150 return; 1151 1152 ev->type = EVENT_DISCONNECTED; 1153 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1154 ev->dc.ie_len = ie_len; 1155 memcpy((void *)ev->dc.ie, ie, ie_len); 1156 ev->dc.reason = reason; 1157 ev->dc.locally_generated = locally_generated; 1158 1159 spin_lock_irqsave(&wdev->event_lock, flags); 1160 list_add_tail(&ev->list, &wdev->event_list); 1161 spin_unlock_irqrestore(&wdev->event_lock, flags); 1162 queue_work(cfg80211_wq, &rdev->event_work); 1163 } 1164 EXPORT_SYMBOL(cfg80211_disconnected); 1165 1166 /* 1167 * API calls for nl80211/wext compatibility code 1168 */ 1169 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1170 struct net_device *dev, 1171 struct cfg80211_connect_params *connect, 1172 struct cfg80211_cached_keys *connkeys, 1173 const u8 *prev_bssid) 1174 { 1175 struct wireless_dev *wdev = dev->ieee80211_ptr; 1176 int err; 1177 1178 ASSERT_WDEV_LOCK(wdev); 1179 1180 /* 1181 * If we have an ssid_len, we're trying to connect or are 1182 * already connected, so reject a new SSID unless it's the 1183 * same (which is the case for re-association.) 1184 */ 1185 if (wdev->ssid_len && 1186 (wdev->ssid_len != connect->ssid_len || 1187 memcmp(wdev->ssid, connect->ssid, wdev->ssid_len))) 1188 return -EALREADY; 1189 1190 /* 1191 * If connected, reject (re-)association unless prev_bssid 1192 * matches the current BSSID. 1193 */ 1194 if (wdev->current_bss) { 1195 if (!prev_bssid) 1196 return -EALREADY; 1197 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid)) 1198 return -ENOTCONN; 1199 } 1200 1201 /* 1202 * Reject if we're in the process of connecting with WEP, 1203 * this case isn't very interesting and trying to handle 1204 * it would make the code much more complex. 1205 */ 1206 if (wdev->connect_keys) 1207 return -EINPROGRESS; 1208 1209 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1210 rdev->wiphy.ht_capa_mod_mask); 1211 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1212 rdev->wiphy.vht_capa_mod_mask); 1213 1214 if (connkeys && connkeys->def >= 0) { 1215 int idx; 1216 u32 cipher; 1217 1218 idx = connkeys->def; 1219 cipher = connkeys->params[idx].cipher; 1220 /* If given a WEP key we may need it for shared key auth */ 1221 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1222 cipher == WLAN_CIPHER_SUITE_WEP104) { 1223 connect->key_idx = idx; 1224 connect->key = connkeys->params[idx].key; 1225 connect->key_len = connkeys->params[idx].key_len; 1226 1227 /* 1228 * If ciphers are not set (e.g. when going through 1229 * iwconfig), we have to set them appropriately here. 1230 */ 1231 if (connect->crypto.cipher_group == 0) 1232 connect->crypto.cipher_group = cipher; 1233 1234 if (connect->crypto.n_ciphers_pairwise == 0) { 1235 connect->crypto.n_ciphers_pairwise = 1; 1236 connect->crypto.ciphers_pairwise[0] = cipher; 1237 } 1238 } 1239 1240 connect->crypto.wep_keys = connkeys->params; 1241 connect->crypto.wep_tx_key = connkeys->def; 1242 } else { 1243 if (WARN_ON(connkeys)) 1244 return -EINVAL; 1245 } 1246 1247 wdev->connect_keys = connkeys; 1248 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 1249 wdev->ssid_len = connect->ssid_len; 1250 1251 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1252 IEEE80211_BSS_TYPE_ESS; 1253 1254 if (!rdev->ops->connect) 1255 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1256 else 1257 err = rdev_connect(rdev, dev, connect); 1258 1259 if (err) { 1260 wdev->connect_keys = NULL; 1261 /* 1262 * This could be reassoc getting refused, don't clear 1263 * ssid_len in that case. 1264 */ 1265 if (!wdev->current_bss) 1266 wdev->ssid_len = 0; 1267 return err; 1268 } 1269 1270 return 0; 1271 } 1272 1273 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1274 struct net_device *dev, u16 reason, bool wextev) 1275 { 1276 struct wireless_dev *wdev = dev->ieee80211_ptr; 1277 int err = 0; 1278 1279 ASSERT_WDEV_LOCK(wdev); 1280 1281 kfree_sensitive(wdev->connect_keys); 1282 wdev->connect_keys = NULL; 1283 1284 wdev->conn_owner_nlportid = 0; 1285 1286 if (wdev->conn) 1287 err = cfg80211_sme_disconnect(wdev, reason); 1288 else if (!rdev->ops->disconnect) 1289 cfg80211_mlme_down(rdev, dev); 1290 else if (wdev->ssid_len) 1291 err = rdev_disconnect(rdev, dev, reason); 1292 1293 /* 1294 * Clear ssid_len unless we actually were fully connected, 1295 * in which case cfg80211_disconnected() will take care of 1296 * this later. 1297 */ 1298 if (!wdev->current_bss) 1299 wdev->ssid_len = 0; 1300 1301 return err; 1302 } 1303 1304 /* 1305 * Used to clean up after the connection / connection attempt owner socket 1306 * disconnects 1307 */ 1308 void cfg80211_autodisconnect_wk(struct work_struct *work) 1309 { 1310 struct wireless_dev *wdev = 1311 container_of(work, struct wireless_dev, disconnect_wk); 1312 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1313 1314 wdev_lock(wdev); 1315 1316 if (wdev->conn_owner_nlportid) { 1317 switch (wdev->iftype) { 1318 case NL80211_IFTYPE_ADHOC: 1319 __cfg80211_leave_ibss(rdev, wdev->netdev, false); 1320 break; 1321 case NL80211_IFTYPE_AP: 1322 case NL80211_IFTYPE_P2P_GO: 1323 __cfg80211_stop_ap(rdev, wdev->netdev, false); 1324 break; 1325 case NL80211_IFTYPE_MESH_POINT: 1326 __cfg80211_leave_mesh(rdev, wdev->netdev); 1327 break; 1328 case NL80211_IFTYPE_STATION: 1329 case NL80211_IFTYPE_P2P_CLIENT: 1330 /* 1331 * Use disconnect_bssid if still connecting and 1332 * ops->disconnect not implemented. Otherwise we can 1333 * use cfg80211_disconnect. 1334 */ 1335 if (rdev->ops->disconnect || wdev->current_bss) 1336 cfg80211_disconnect(rdev, wdev->netdev, 1337 WLAN_REASON_DEAUTH_LEAVING, 1338 true); 1339 else 1340 cfg80211_mlme_deauth(rdev, wdev->netdev, 1341 wdev->disconnect_bssid, 1342 NULL, 0, 1343 WLAN_REASON_DEAUTH_LEAVING, 1344 false); 1345 break; 1346 default: 1347 break; 1348 } 1349 } 1350 1351 wdev_unlock(wdev); 1352 } 1353