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 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 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_RTNL(); 71 ASSERT_WDEV_LOCK(wdev); 72 73 if (rdev->scan_req || rdev->scan_msg) 74 return -EBUSY; 75 76 if (wdev->conn->params.channel) 77 n_channels = 1; 78 else 79 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy); 80 81 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 82 sizeof(request->channels[0]) * n_channels, 83 GFP_KERNEL); 84 if (!request) 85 return -ENOMEM; 86 87 if (wdev->conn->params.channel) { 88 enum nl80211_band band = wdev->conn->params.channel->band; 89 struct ieee80211_supported_band *sband = 90 wdev->wiphy->bands[band]; 91 92 if (!sband) { 93 kfree(request); 94 return -EINVAL; 95 } 96 request->channels[0] = wdev->conn->params.channel; 97 request->rates[band] = (1 << sband->n_bitrates) - 1; 98 } else { 99 int i = 0, j; 100 enum nl80211_band band; 101 struct ieee80211_supported_band *bands; 102 struct ieee80211_channel *channel; 103 104 for (band = 0; band < NUM_NL80211_BANDS; band++) { 105 bands = wdev->wiphy->bands[band]; 106 if (!bands) 107 continue; 108 for (j = 0; j < bands->n_channels; j++) { 109 channel = &bands->channels[j]; 110 if (channel->flags & IEEE80211_CHAN_DISABLED) 111 continue; 112 request->channels[i++] = channel; 113 } 114 request->rates[band] = (1 << bands->n_bitrates) - 1; 115 } 116 n_channels = i; 117 } 118 request->n_channels = n_channels; 119 request->ssids = (void *)&request->channels[n_channels]; 120 request->n_ssids = 1; 121 122 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 123 wdev->conn->params.ssid_len); 124 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 125 126 eth_broadcast_addr(request->bssid); 127 128 request->wdev = wdev; 129 request->wiphy = &rdev->wiphy; 130 request->scan_start = jiffies; 131 132 rdev->scan_req = request; 133 134 err = rdev_scan(rdev, request); 135 if (!err) { 136 wdev->conn->state = CFG80211_CONN_SCANNING; 137 nl80211_send_scan_start(rdev, wdev); 138 dev_hold(wdev->netdev); 139 } else { 140 rdev->scan_req = NULL; 141 kfree(request); 142 } 143 return err; 144 } 145 146 static int cfg80211_conn_do_work(struct wireless_dev *wdev, 147 enum nl80211_timeout_reason *treason) 148 { 149 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 150 struct cfg80211_connect_params *params; 151 struct cfg80211_assoc_request req = {}; 152 int err; 153 154 ASSERT_WDEV_LOCK(wdev); 155 156 if (!wdev->conn) 157 return 0; 158 159 params = &wdev->conn->params; 160 161 switch (wdev->conn->state) { 162 case CFG80211_CONN_SCANNING: 163 /* didn't find it during scan ... */ 164 return -ENOENT; 165 case CFG80211_CONN_SCAN_AGAIN: 166 return cfg80211_conn_scan(wdev); 167 case CFG80211_CONN_AUTHENTICATE_NEXT: 168 if (WARN_ON(!rdev->ops->auth)) 169 return -EOPNOTSUPP; 170 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 171 return cfg80211_mlme_auth(rdev, wdev->netdev, 172 params->channel, params->auth_type, 173 params->bssid, 174 params->ssid, params->ssid_len, 175 NULL, 0, 176 params->key, params->key_len, 177 params->key_idx, NULL, 0); 178 case CFG80211_CONN_AUTH_FAILED_TIMEOUT: 179 *treason = NL80211_TIMEOUT_AUTH; 180 return -ENOTCONN; 181 case CFG80211_CONN_ASSOCIATE_NEXT: 182 if (WARN_ON(!rdev->ops->assoc)) 183 return -EOPNOTSUPP; 184 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 185 if (wdev->conn->prev_bssid_valid) 186 req.prev_bssid = wdev->conn->prev_bssid; 187 req.ie = params->ie; 188 req.ie_len = params->ie_len; 189 req.use_mfp = params->mfp != NL80211_MFP_NO; 190 req.crypto = params->crypto; 191 req.flags = params->flags; 192 req.ht_capa = params->ht_capa; 193 req.ht_capa_mask = params->ht_capa_mask; 194 req.vht_capa = params->vht_capa; 195 req.vht_capa_mask = params->vht_capa_mask; 196 197 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 198 params->bssid, params->ssid, 199 params->ssid_len, &req); 200 if (err) 201 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 202 NULL, 0, 203 WLAN_REASON_DEAUTH_LEAVING, 204 false); 205 return err; 206 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT: 207 *treason = NL80211_TIMEOUT_ASSOC; 208 /* fall through */ 209 case CFG80211_CONN_ASSOC_FAILED: 210 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 211 NULL, 0, 212 WLAN_REASON_DEAUTH_LEAVING, false); 213 return -ENOTCONN; 214 case CFG80211_CONN_DEAUTH: 215 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 216 NULL, 0, 217 WLAN_REASON_DEAUTH_LEAVING, false); 218 /* fall through */ 219 case CFG80211_CONN_ABANDON: 220 /* free directly, disconnected event already sent */ 221 cfg80211_sme_free(wdev); 222 return 0; 223 default: 224 return 0; 225 } 226 } 227 228 void cfg80211_conn_work(struct work_struct *work) 229 { 230 struct cfg80211_registered_device *rdev = 231 container_of(work, struct cfg80211_registered_device, conn_work); 232 struct wireless_dev *wdev; 233 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 234 enum nl80211_timeout_reason treason; 235 236 rtnl_lock(); 237 238 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 239 if (!wdev->netdev) 240 continue; 241 242 wdev_lock(wdev); 243 if (!netif_running(wdev->netdev)) { 244 wdev_unlock(wdev); 245 continue; 246 } 247 if (!wdev->conn || 248 wdev->conn->state == CFG80211_CONN_CONNECTED) { 249 wdev_unlock(wdev); 250 continue; 251 } 252 if (wdev->conn->params.bssid) { 253 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 254 bssid = bssid_buf; 255 } 256 treason = NL80211_TIMEOUT_UNSPECIFIED; 257 if (cfg80211_conn_do_work(wdev, &treason)) { 258 struct cfg80211_connect_resp_params cr; 259 260 memset(&cr, 0, sizeof(cr)); 261 cr.status = -1; 262 cr.bssid = bssid; 263 cr.timeout_reason = treason; 264 __cfg80211_connect_result(wdev->netdev, &cr, false); 265 } 266 wdev_unlock(wdev); 267 } 268 269 rtnl_unlock(); 270 } 271 272 /* Returned bss is reference counted and must be cleaned up appropriately. */ 273 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 274 { 275 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 276 struct cfg80211_bss *bss; 277 278 ASSERT_WDEV_LOCK(wdev); 279 280 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 281 wdev->conn->params.bssid, 282 wdev->conn->params.ssid, 283 wdev->conn->params.ssid_len, 284 wdev->conn_bss_type, 285 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 286 if (!bss) 287 return NULL; 288 289 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 290 wdev->conn->params.bssid = wdev->conn->bssid; 291 wdev->conn->params.channel = bss->channel; 292 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 293 schedule_work(&rdev->conn_work); 294 295 return bss; 296 } 297 298 static void __cfg80211_sme_scan_done(struct net_device *dev) 299 { 300 struct wireless_dev *wdev = dev->ieee80211_ptr; 301 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 302 struct cfg80211_bss *bss; 303 304 ASSERT_WDEV_LOCK(wdev); 305 306 if (!wdev->conn) 307 return; 308 309 if (wdev->conn->state != CFG80211_CONN_SCANNING && 310 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 311 return; 312 313 bss = cfg80211_get_conn_bss(wdev); 314 if (bss) 315 cfg80211_put_bss(&rdev->wiphy, bss); 316 else 317 schedule_work(&rdev->conn_work); 318 } 319 320 void cfg80211_sme_scan_done(struct net_device *dev) 321 { 322 struct wireless_dev *wdev = dev->ieee80211_ptr; 323 324 wdev_lock(wdev); 325 __cfg80211_sme_scan_done(dev); 326 wdev_unlock(wdev); 327 } 328 329 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 330 { 331 struct wiphy *wiphy = wdev->wiphy; 332 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 333 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 334 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 335 336 ASSERT_WDEV_LOCK(wdev); 337 338 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 339 return; 340 341 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 342 wdev->conn->auto_auth && 343 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 344 /* select automatically between only open, shared, leap */ 345 switch (wdev->conn->params.auth_type) { 346 case NL80211_AUTHTYPE_OPEN_SYSTEM: 347 if (wdev->connect_keys) 348 wdev->conn->params.auth_type = 349 NL80211_AUTHTYPE_SHARED_KEY; 350 else 351 wdev->conn->params.auth_type = 352 NL80211_AUTHTYPE_NETWORK_EAP; 353 break; 354 case NL80211_AUTHTYPE_SHARED_KEY: 355 wdev->conn->params.auth_type = 356 NL80211_AUTHTYPE_NETWORK_EAP; 357 break; 358 default: 359 /* huh? */ 360 wdev->conn->params.auth_type = 361 NL80211_AUTHTYPE_OPEN_SYSTEM; 362 break; 363 } 364 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 365 schedule_work(&rdev->conn_work); 366 } else if (status_code != WLAN_STATUS_SUCCESS) { 367 struct cfg80211_connect_resp_params cr; 368 369 memset(&cr, 0, sizeof(cr)); 370 cr.status = status_code; 371 cr.bssid = mgmt->bssid; 372 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 373 __cfg80211_connect_result(wdev->netdev, &cr, false); 374 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 375 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 376 schedule_work(&rdev->conn_work); 377 } 378 } 379 380 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 381 { 382 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 383 384 if (!wdev->conn) 385 return false; 386 387 if (status == WLAN_STATUS_SUCCESS) { 388 wdev->conn->state = CFG80211_CONN_CONNECTED; 389 return false; 390 } 391 392 if (wdev->conn->prev_bssid_valid) { 393 /* 394 * Some stupid APs don't accept reassoc, so we 395 * need to fall back to trying regular assoc; 396 * return true so no event is sent to userspace. 397 */ 398 wdev->conn->prev_bssid_valid = false; 399 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 400 schedule_work(&rdev->conn_work); 401 return true; 402 } 403 404 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 405 schedule_work(&rdev->conn_work); 406 return false; 407 } 408 409 void cfg80211_sme_deauth(struct wireless_dev *wdev) 410 { 411 cfg80211_sme_free(wdev); 412 } 413 414 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 415 { 416 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 417 418 if (!wdev->conn) 419 return; 420 421 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 422 schedule_work(&rdev->conn_work); 423 } 424 425 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 426 { 427 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 428 429 if (!wdev->conn) 430 return; 431 432 wdev->conn->state = CFG80211_CONN_DEAUTH; 433 schedule_work(&rdev->conn_work); 434 } 435 436 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 437 { 438 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 439 440 if (!wdev->conn) 441 return; 442 443 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; 444 schedule_work(&rdev->conn_work); 445 } 446 447 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) 448 { 449 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 450 451 if (!wdev->conn) 452 return; 453 454 wdev->conn->state = CFG80211_CONN_ABANDON; 455 schedule_work(&rdev->conn_work); 456 } 457 458 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 459 const u8 *ies, size_t ies_len, 460 const u8 **out_ies, size_t *out_ies_len) 461 { 462 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 463 u8 *buf; 464 size_t offs; 465 466 if (!rdev->wiphy.extended_capabilities_len || 467 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 468 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 469 if (!*out_ies) 470 return -ENOMEM; 471 *out_ies_len = ies_len; 472 return 0; 473 } 474 475 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 476 GFP_KERNEL); 477 if (!buf) 478 return -ENOMEM; 479 480 if (ies_len) { 481 static const u8 before_extcapa[] = { 482 /* not listing IEs expected to be created by driver */ 483 WLAN_EID_RSN, 484 WLAN_EID_QOS_CAPA, 485 WLAN_EID_RRM_ENABLED_CAPABILITIES, 486 WLAN_EID_MOBILITY_DOMAIN, 487 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 488 WLAN_EID_BSS_COEX_2040, 489 }; 490 491 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 492 ARRAY_SIZE(before_extcapa), 0); 493 memcpy(buf, ies, offs); 494 /* leave a whole for extended capabilities IE */ 495 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 496 ies + offs, ies_len - offs); 497 } else { 498 offs = 0; 499 } 500 501 /* place extended capabilities IE (with only driver capabilities) */ 502 buf[offs] = WLAN_EID_EXT_CAPABILITY; 503 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 504 memcpy(buf + offs + 2, 505 rdev->wiphy.extended_capabilities, 506 rdev->wiphy.extended_capabilities_len); 507 508 *out_ies = buf; 509 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 510 511 return 0; 512 } 513 514 static int cfg80211_sme_connect(struct wireless_dev *wdev, 515 struct cfg80211_connect_params *connect, 516 const u8 *prev_bssid) 517 { 518 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 519 struct cfg80211_bss *bss; 520 int err; 521 522 if (!rdev->ops->auth || !rdev->ops->assoc) 523 return -EOPNOTSUPP; 524 525 if (wdev->current_bss) { 526 cfg80211_unhold_bss(wdev->current_bss); 527 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 528 wdev->current_bss = NULL; 529 530 cfg80211_sme_free(wdev); 531 } 532 533 if (WARN_ON(wdev->conn)) 534 return -EINPROGRESS; 535 536 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 537 if (!wdev->conn) 538 return -ENOMEM; 539 540 /* 541 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 542 */ 543 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 544 if (connect->bssid) { 545 wdev->conn->params.bssid = wdev->conn->bssid; 546 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 547 } 548 549 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 550 &wdev->conn->ie, 551 &wdev->conn->params.ie_len)) { 552 kfree(wdev->conn); 553 wdev->conn = NULL; 554 return -ENOMEM; 555 } 556 wdev->conn->params.ie = wdev->conn->ie; 557 558 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 559 wdev->conn->auto_auth = true; 560 /* start with open system ... should mostly work */ 561 wdev->conn->params.auth_type = 562 NL80211_AUTHTYPE_OPEN_SYSTEM; 563 } else { 564 wdev->conn->auto_auth = false; 565 } 566 567 wdev->conn->params.ssid = wdev->ssid; 568 wdev->conn->params.ssid_len = wdev->ssid_len; 569 570 /* see if we have the bss already */ 571 bss = cfg80211_get_conn_bss(wdev); 572 573 if (prev_bssid) { 574 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 575 wdev->conn->prev_bssid_valid = true; 576 } 577 578 /* we're good if we have a matching bss struct */ 579 if (bss) { 580 enum nl80211_timeout_reason treason; 581 582 err = cfg80211_conn_do_work(wdev, &treason); 583 cfg80211_put_bss(wdev->wiphy, bss); 584 } else { 585 /* otherwise we'll need to scan for the AP first */ 586 err = cfg80211_conn_scan(wdev); 587 588 /* 589 * If we can't scan right now, then we need to scan again 590 * after the current scan finished, since the parameters 591 * changed (unless we find a good AP anyway). 592 */ 593 if (err == -EBUSY) { 594 err = 0; 595 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 596 } 597 } 598 599 if (err) 600 cfg80211_sme_free(wdev); 601 602 return err; 603 } 604 605 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 606 { 607 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 608 int err; 609 610 if (!wdev->conn) 611 return 0; 612 613 if (!rdev->ops->deauth) 614 return -EOPNOTSUPP; 615 616 if (wdev->conn->state == CFG80211_CONN_SCANNING || 617 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 618 err = 0; 619 goto out; 620 } 621 622 /* wdev->conn->params.bssid must be set if > SCANNING */ 623 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 624 wdev->conn->params.bssid, 625 NULL, 0, reason, false); 626 out: 627 cfg80211_sme_free(wdev); 628 return err; 629 } 630 631 /* 632 * code shared for in-device and software SME 633 */ 634 635 static bool cfg80211_is_all_idle(void) 636 { 637 struct cfg80211_registered_device *rdev; 638 struct wireless_dev *wdev; 639 bool is_all_idle = true; 640 641 /* 642 * All devices must be idle as otherwise if you are actively 643 * scanning some new beacon hints could be learned and would 644 * count as new regulatory hints. 645 * Also if there is any other active beaconing interface we 646 * need not issue a disconnect hint and reset any info such 647 * as chan dfs state, etc. 648 */ 649 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 650 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 651 wdev_lock(wdev); 652 if (wdev->conn || wdev->current_bss || 653 cfg80211_beaconing_iface_active(wdev)) 654 is_all_idle = false; 655 wdev_unlock(wdev); 656 } 657 } 658 659 return is_all_idle; 660 } 661 662 static void disconnect_work(struct work_struct *work) 663 { 664 rtnl_lock(); 665 if (cfg80211_is_all_idle()) 666 regulatory_hint_disconnect(); 667 rtnl_unlock(); 668 } 669 670 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 671 672 673 /* 674 * API calls for drivers implementing connect/disconnect and 675 * SME event handling 676 */ 677 678 /* This method must consume bss one way or another */ 679 void __cfg80211_connect_result(struct net_device *dev, 680 struct cfg80211_connect_resp_params *cr, 681 bool wextev) 682 { 683 struct wireless_dev *wdev = dev->ieee80211_ptr; 684 const u8 *country_ie; 685 #ifdef CONFIG_CFG80211_WEXT 686 union iwreq_data wrqu; 687 #endif 688 689 ASSERT_WDEV_LOCK(wdev); 690 691 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 692 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 693 cfg80211_put_bss(wdev->wiphy, cr->bss); 694 return; 695 } 696 697 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 698 GFP_KERNEL); 699 700 #ifdef CONFIG_CFG80211_WEXT 701 if (wextev) { 702 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 703 memset(&wrqu, 0, sizeof(wrqu)); 704 wrqu.data.length = cr->req_ie_len; 705 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 706 cr->req_ie); 707 } 708 709 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 710 memset(&wrqu, 0, sizeof(wrqu)); 711 wrqu.data.length = cr->resp_ie_len; 712 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 713 cr->resp_ie); 714 } 715 716 memset(&wrqu, 0, sizeof(wrqu)); 717 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 718 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) { 719 memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN); 720 memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN); 721 wdev->wext.prev_bssid_valid = true; 722 } 723 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 724 } 725 #endif 726 727 if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) { 728 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 729 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid, 730 wdev->ssid, wdev->ssid_len, 731 wdev->conn_bss_type, 732 IEEE80211_PRIVACY_ANY); 733 if (cr->bss) 734 cfg80211_hold_bss(bss_from_pub(cr->bss)); 735 } 736 737 if (wdev->current_bss) { 738 cfg80211_unhold_bss(wdev->current_bss); 739 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 740 wdev->current_bss = NULL; 741 } 742 743 if (cr->status != WLAN_STATUS_SUCCESS) { 744 kzfree(wdev->connect_keys); 745 wdev->connect_keys = NULL; 746 wdev->ssid_len = 0; 747 wdev->conn_owner_nlportid = 0; 748 if (cr->bss) { 749 cfg80211_unhold_bss(bss_from_pub(cr->bss)); 750 cfg80211_put_bss(wdev->wiphy, cr->bss); 751 } 752 cfg80211_sme_free(wdev); 753 return; 754 } 755 756 if (WARN_ON(!cr->bss)) 757 return; 758 759 wdev->current_bss = bss_from_pub(cr->bss); 760 761 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP)) 762 cfg80211_upload_connect_keys(wdev); 763 764 rcu_read_lock(); 765 country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY); 766 if (!country_ie) { 767 rcu_read_unlock(); 768 return; 769 } 770 771 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 772 rcu_read_unlock(); 773 774 if (!country_ie) 775 return; 776 777 /* 778 * ieee80211_bss_get_ie() ensures we can access: 779 * - country_ie + 2, the start of the country ie data, and 780 * - and country_ie[1] which is the IE length 781 */ 782 regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band, 783 country_ie + 2, country_ie[1]); 784 kfree(country_ie); 785 } 786 787 /* Consumes bss object one way or another */ 788 void cfg80211_connect_done(struct net_device *dev, 789 struct cfg80211_connect_resp_params *params, 790 gfp_t gfp) 791 { 792 struct wireless_dev *wdev = dev->ieee80211_ptr; 793 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 794 struct cfg80211_event *ev; 795 unsigned long flags; 796 u8 *next; 797 798 if (params->bss) { 799 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss); 800 801 if (list_empty(&ibss->list)) { 802 struct cfg80211_bss *found = NULL, *tmp = params->bss; 803 804 found = cfg80211_get_bss(wdev->wiphy, NULL, 805 params->bss->bssid, 806 wdev->ssid, wdev->ssid_len, 807 wdev->conn_bss_type, 808 IEEE80211_PRIVACY_ANY); 809 if (found) { 810 /* The same BSS is already updated so use it 811 * instead, as it has latest info. 812 */ 813 params->bss = found; 814 } else { 815 /* Update with BSS provided by driver, it will 816 * be freshly added and ref cnted, we can free 817 * the old one. 818 * 819 * signal_valid can be false, as we are not 820 * expecting the BSS to be found. 821 * 822 * keep the old timestamp to avoid confusion 823 */ 824 cfg80211_bss_update(rdev, ibss, false, 825 ibss->ts); 826 } 827 828 cfg80211_put_bss(wdev->wiphy, tmp); 829 } 830 } 831 832 ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) + 833 params->req_ie_len + params->resp_ie_len + 834 params->fils.kek_len + params->fils.pmk_len + 835 (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 836 if (!ev) { 837 cfg80211_put_bss(wdev->wiphy, params->bss); 838 return; 839 } 840 841 ev->type = EVENT_CONNECT_RESULT; 842 next = ((u8 *)ev) + sizeof(*ev); 843 if (params->bssid) { 844 ev->cr.bssid = next; 845 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN); 846 next += ETH_ALEN; 847 } 848 if (params->req_ie_len) { 849 ev->cr.req_ie = next; 850 ev->cr.req_ie_len = params->req_ie_len; 851 memcpy((void *)ev->cr.req_ie, params->req_ie, 852 params->req_ie_len); 853 next += params->req_ie_len; 854 } 855 if (params->resp_ie_len) { 856 ev->cr.resp_ie = next; 857 ev->cr.resp_ie_len = params->resp_ie_len; 858 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 859 params->resp_ie_len); 860 next += params->resp_ie_len; 861 } 862 if (params->fils.kek_len) { 863 ev->cr.fils.kek = next; 864 ev->cr.fils.kek_len = params->fils.kek_len; 865 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 866 params->fils.kek_len); 867 next += params->fils.kek_len; 868 } 869 if (params->fils.pmk_len) { 870 ev->cr.fils.pmk = next; 871 ev->cr.fils.pmk_len = params->fils.pmk_len; 872 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 873 params->fils.pmk_len); 874 next += params->fils.pmk_len; 875 } 876 if (params->fils.pmkid) { 877 ev->cr.fils.pmkid = next; 878 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 879 WLAN_PMKID_LEN); 880 next += WLAN_PMKID_LEN; 881 } 882 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 883 if (params->fils.update_erp_next_seq_num) 884 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 885 if (params->bss) 886 cfg80211_hold_bss(bss_from_pub(params->bss)); 887 ev->cr.bss = params->bss; 888 ev->cr.status = params->status; 889 ev->cr.timeout_reason = params->timeout_reason; 890 891 spin_lock_irqsave(&wdev->event_lock, flags); 892 list_add_tail(&ev->list, &wdev->event_list); 893 spin_unlock_irqrestore(&wdev->event_lock, flags); 894 queue_work(cfg80211_wq, &rdev->event_work); 895 } 896 EXPORT_SYMBOL(cfg80211_connect_done); 897 898 /* Consumes bss object one way or another */ 899 void __cfg80211_roamed(struct wireless_dev *wdev, 900 struct cfg80211_roam_info *info) 901 { 902 #ifdef CONFIG_CFG80211_WEXT 903 union iwreq_data wrqu; 904 #endif 905 ASSERT_WDEV_LOCK(wdev); 906 907 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 908 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 909 goto out; 910 911 if (WARN_ON(!wdev->current_bss)) 912 goto out; 913 914 cfg80211_unhold_bss(wdev->current_bss); 915 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 916 wdev->current_bss = NULL; 917 918 if (WARN_ON(!info->bss)) 919 return; 920 921 cfg80211_hold_bss(bss_from_pub(info->bss)); 922 wdev->current_bss = bss_from_pub(info->bss); 923 924 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 925 wdev->netdev, info, GFP_KERNEL); 926 927 #ifdef CONFIG_CFG80211_WEXT 928 if (info->req_ie) { 929 memset(&wrqu, 0, sizeof(wrqu)); 930 wrqu.data.length = info->req_ie_len; 931 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 932 &wrqu, info->req_ie); 933 } 934 935 if (info->resp_ie) { 936 memset(&wrqu, 0, sizeof(wrqu)); 937 wrqu.data.length = info->resp_ie_len; 938 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 939 &wrqu, info->resp_ie); 940 } 941 942 memset(&wrqu, 0, sizeof(wrqu)); 943 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 944 memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN); 945 memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN); 946 wdev->wext.prev_bssid_valid = true; 947 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 948 #endif 949 950 return; 951 out: 952 cfg80211_put_bss(wdev->wiphy, info->bss); 953 } 954 955 /* Consumes info->bss object one way or another */ 956 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 957 gfp_t gfp) 958 { 959 struct wireless_dev *wdev = dev->ieee80211_ptr; 960 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 961 struct cfg80211_event *ev; 962 unsigned long flags; 963 u8 *next; 964 965 if (!info->bss) { 966 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel, 967 info->bssid, wdev->ssid, 968 wdev->ssid_len, 969 wdev->conn_bss_type, 970 IEEE80211_PRIVACY_ANY); 971 } 972 973 if (WARN_ON(!info->bss)) 974 return; 975 976 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 977 info->fils.kek_len + info->fils.pmk_len + 978 (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 979 if (!ev) { 980 cfg80211_put_bss(wdev->wiphy, info->bss); 981 return; 982 } 983 984 ev->type = EVENT_ROAMED; 985 next = ((u8 *)ev) + sizeof(*ev); 986 if (info->req_ie_len) { 987 ev->rm.req_ie = next; 988 ev->rm.req_ie_len = info->req_ie_len; 989 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 990 next += info->req_ie_len; 991 } 992 if (info->resp_ie_len) { 993 ev->rm.resp_ie = next; 994 ev->rm.resp_ie_len = info->resp_ie_len; 995 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 996 info->resp_ie_len); 997 next += info->resp_ie_len; 998 } 999 if (info->fils.kek_len) { 1000 ev->rm.fils.kek = next; 1001 ev->rm.fils.kek_len = info->fils.kek_len; 1002 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1003 info->fils.kek_len); 1004 next += info->fils.kek_len; 1005 } 1006 if (info->fils.pmk_len) { 1007 ev->rm.fils.pmk = next; 1008 ev->rm.fils.pmk_len = info->fils.pmk_len; 1009 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1010 info->fils.pmk_len); 1011 next += info->fils.pmk_len; 1012 } 1013 if (info->fils.pmkid) { 1014 ev->rm.fils.pmkid = next; 1015 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1016 WLAN_PMKID_LEN); 1017 next += WLAN_PMKID_LEN; 1018 } 1019 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1020 if (info->fils.update_erp_next_seq_num) 1021 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1022 ev->rm.bss = info->bss; 1023 1024 spin_lock_irqsave(&wdev->event_lock, flags); 1025 list_add_tail(&ev->list, &wdev->event_list); 1026 spin_unlock_irqrestore(&wdev->event_lock, flags); 1027 queue_work(cfg80211_wq, &rdev->event_work); 1028 } 1029 EXPORT_SYMBOL(cfg80211_roamed); 1030 1031 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid) 1032 { 1033 ASSERT_WDEV_LOCK(wdev); 1034 1035 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) 1036 return; 1037 1038 if (WARN_ON(!wdev->current_bss) || 1039 WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) 1040 return; 1041 1042 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1043 bssid); 1044 } 1045 1046 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1047 gfp_t gfp) 1048 { 1049 struct wireless_dev *wdev = dev->ieee80211_ptr; 1050 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1051 struct cfg80211_event *ev; 1052 unsigned long flags; 1053 1054 if (WARN_ON(!bssid)) 1055 return; 1056 1057 ev = kzalloc(sizeof(*ev), gfp); 1058 if (!ev) 1059 return; 1060 1061 ev->type = EVENT_PORT_AUTHORIZED; 1062 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1063 1064 /* 1065 * Use the wdev event list so that if there are pending 1066 * connected/roamed events, they will be reported first. 1067 */ 1068 spin_lock_irqsave(&wdev->event_lock, flags); 1069 list_add_tail(&ev->list, &wdev->event_list); 1070 spin_unlock_irqrestore(&wdev->event_lock, flags); 1071 queue_work(cfg80211_wq, &rdev->event_work); 1072 } 1073 EXPORT_SYMBOL(cfg80211_port_authorized); 1074 1075 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1076 size_t ie_len, u16 reason, bool from_ap) 1077 { 1078 struct wireless_dev *wdev = dev->ieee80211_ptr; 1079 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1080 int i; 1081 #ifdef CONFIG_CFG80211_WEXT 1082 union iwreq_data wrqu; 1083 #endif 1084 1085 ASSERT_WDEV_LOCK(wdev); 1086 1087 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1088 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1089 return; 1090 1091 if (wdev->current_bss) { 1092 cfg80211_unhold_bss(wdev->current_bss); 1093 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1094 } 1095 1096 wdev->current_bss = NULL; 1097 wdev->ssid_len = 0; 1098 wdev->conn_owner_nlportid = 0; 1099 kzfree(wdev->connect_keys); 1100 wdev->connect_keys = NULL; 1101 1102 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1103 1104 /* stop critical protocol if supported */ 1105 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1106 rdev->crit_proto_nlportid = 0; 1107 rdev_crit_proto_stop(rdev, wdev); 1108 } 1109 1110 /* 1111 * Delete all the keys ... pairwise keys can't really 1112 * exist any more anyway, but default keys might. 1113 */ 1114 if (rdev->ops->del_key) 1115 for (i = 0; i < 6; i++) 1116 rdev_del_key(rdev, dev, i, false, NULL); 1117 1118 rdev_set_qos_map(rdev, dev, NULL); 1119 1120 #ifdef CONFIG_CFG80211_WEXT 1121 memset(&wrqu, 0, sizeof(wrqu)); 1122 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1123 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1124 wdev->wext.connect.ssid_len = 0; 1125 #endif 1126 1127 schedule_work(&cfg80211_disconnect_work); 1128 } 1129 1130 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1131 const u8 *ie, size_t ie_len, 1132 bool locally_generated, gfp_t gfp) 1133 { 1134 struct wireless_dev *wdev = dev->ieee80211_ptr; 1135 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1136 struct cfg80211_event *ev; 1137 unsigned long flags; 1138 1139 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1140 if (!ev) 1141 return; 1142 1143 ev->type = EVENT_DISCONNECTED; 1144 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1145 ev->dc.ie_len = ie_len; 1146 memcpy((void *)ev->dc.ie, ie, ie_len); 1147 ev->dc.reason = reason; 1148 ev->dc.locally_generated = locally_generated; 1149 1150 spin_lock_irqsave(&wdev->event_lock, flags); 1151 list_add_tail(&ev->list, &wdev->event_list); 1152 spin_unlock_irqrestore(&wdev->event_lock, flags); 1153 queue_work(cfg80211_wq, &rdev->event_work); 1154 } 1155 EXPORT_SYMBOL(cfg80211_disconnected); 1156 1157 /* 1158 * API calls for nl80211/wext compatibility code 1159 */ 1160 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1161 struct net_device *dev, 1162 struct cfg80211_connect_params *connect, 1163 struct cfg80211_cached_keys *connkeys, 1164 const u8 *prev_bssid) 1165 { 1166 struct wireless_dev *wdev = dev->ieee80211_ptr; 1167 int err; 1168 1169 ASSERT_WDEV_LOCK(wdev); 1170 1171 /* 1172 * If we have an ssid_len, we're trying to connect or are 1173 * already connected, so reject a new SSID unless it's the 1174 * same (which is the case for re-association.) 1175 */ 1176 if (wdev->ssid_len && 1177 (wdev->ssid_len != connect->ssid_len || 1178 memcmp(wdev->ssid, connect->ssid, wdev->ssid_len))) 1179 return -EALREADY; 1180 1181 /* 1182 * If connected, reject (re-)association unless prev_bssid 1183 * matches the current BSSID. 1184 */ 1185 if (wdev->current_bss) { 1186 if (!prev_bssid) 1187 return -EALREADY; 1188 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid)) 1189 return -ENOTCONN; 1190 } 1191 1192 /* 1193 * Reject if we're in the process of connecting with WEP, 1194 * this case isn't very interesting and trying to handle 1195 * it would make the code much more complex. 1196 */ 1197 if (wdev->connect_keys) 1198 return -EINPROGRESS; 1199 1200 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1201 rdev->wiphy.ht_capa_mod_mask); 1202 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1203 rdev->wiphy.vht_capa_mod_mask); 1204 1205 if (connkeys && connkeys->def >= 0) { 1206 int idx; 1207 u32 cipher; 1208 1209 idx = connkeys->def; 1210 cipher = connkeys->params[idx].cipher; 1211 /* If given a WEP key we may need it for shared key auth */ 1212 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1213 cipher == WLAN_CIPHER_SUITE_WEP104) { 1214 connect->key_idx = idx; 1215 connect->key = connkeys->params[idx].key; 1216 connect->key_len = connkeys->params[idx].key_len; 1217 1218 /* 1219 * If ciphers are not set (e.g. when going through 1220 * iwconfig), we have to set them appropriately here. 1221 */ 1222 if (connect->crypto.cipher_group == 0) 1223 connect->crypto.cipher_group = cipher; 1224 1225 if (connect->crypto.n_ciphers_pairwise == 0) { 1226 connect->crypto.n_ciphers_pairwise = 1; 1227 connect->crypto.ciphers_pairwise[0] = cipher; 1228 } 1229 } 1230 1231 connect->crypto.wep_keys = connkeys->params; 1232 connect->crypto.wep_tx_key = connkeys->def; 1233 } else { 1234 if (WARN_ON(connkeys)) 1235 return -EINVAL; 1236 } 1237 1238 wdev->connect_keys = connkeys; 1239 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 1240 wdev->ssid_len = connect->ssid_len; 1241 1242 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1243 IEEE80211_BSS_TYPE_ESS; 1244 1245 if (!rdev->ops->connect) 1246 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1247 else 1248 err = rdev_connect(rdev, dev, connect); 1249 1250 if (err) { 1251 wdev->connect_keys = NULL; 1252 /* 1253 * This could be reassoc getting refused, don't clear 1254 * ssid_len in that case. 1255 */ 1256 if (!wdev->current_bss) 1257 wdev->ssid_len = 0; 1258 return err; 1259 } 1260 1261 return 0; 1262 } 1263 1264 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1265 struct net_device *dev, u16 reason, bool wextev) 1266 { 1267 struct wireless_dev *wdev = dev->ieee80211_ptr; 1268 int err = 0; 1269 1270 ASSERT_WDEV_LOCK(wdev); 1271 1272 kzfree(wdev->connect_keys); 1273 wdev->connect_keys = NULL; 1274 1275 wdev->conn_owner_nlportid = 0; 1276 1277 if (wdev->conn) 1278 err = cfg80211_sme_disconnect(wdev, reason); 1279 else if (!rdev->ops->disconnect) 1280 cfg80211_mlme_down(rdev, dev); 1281 else if (wdev->ssid_len) 1282 err = rdev_disconnect(rdev, dev, reason); 1283 1284 /* 1285 * Clear ssid_len unless we actually were fully connected, 1286 * in which case cfg80211_disconnected() will take care of 1287 * this later. 1288 */ 1289 if (!wdev->current_bss) 1290 wdev->ssid_len = 0; 1291 1292 return err; 1293 } 1294 1295 /* 1296 * Used to clean up after the connection / connection attempt owner socket 1297 * disconnects 1298 */ 1299 void cfg80211_autodisconnect_wk(struct work_struct *work) 1300 { 1301 struct wireless_dev *wdev = 1302 container_of(work, struct wireless_dev, disconnect_wk); 1303 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1304 1305 wdev_lock(wdev); 1306 1307 if (wdev->conn_owner_nlportid) { 1308 switch (wdev->iftype) { 1309 case NL80211_IFTYPE_ADHOC: 1310 cfg80211_leave_ibss(rdev, wdev->netdev, false); 1311 break; 1312 case NL80211_IFTYPE_AP: 1313 case NL80211_IFTYPE_P2P_GO: 1314 cfg80211_stop_ap(rdev, wdev->netdev, false); 1315 break; 1316 case NL80211_IFTYPE_MESH_POINT: 1317 cfg80211_leave_mesh(rdev, wdev->netdev); 1318 break; 1319 case NL80211_IFTYPE_STATION: 1320 case NL80211_IFTYPE_P2P_CLIENT: 1321 /* 1322 * Use disconnect_bssid if still connecting and 1323 * ops->disconnect not implemented. Otherwise we can 1324 * use cfg80211_disconnect. 1325 */ 1326 if (rdev->ops->disconnect || wdev->current_bss) 1327 cfg80211_disconnect(rdev, wdev->netdev, 1328 WLAN_REASON_DEAUTH_LEAVING, 1329 true); 1330 else 1331 cfg80211_mlme_deauth(rdev, wdev->netdev, 1332 wdev->disconnect_bssid, 1333 NULL, 0, 1334 WLAN_REASON_DEAUTH_LEAVING, 1335 false); 1336 break; 1337 default: 1338 break; 1339 } 1340 } 1341 1342 wdev_unlock(wdev); 1343 } 1344