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 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 void cfg80211_wdev_release_bsses(struct wireless_dev *wdev) 458 { 459 unsigned int link; 460 461 for_each_valid_link(wdev, link) { 462 if (!wdev->links[link].client.current_bss) 463 continue; 464 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 465 cfg80211_put_bss(wdev->wiphy, 466 &wdev->links[link].client.current_bss->pub); 467 wdev->links[link].client.current_bss = NULL; 468 } 469 } 470 471 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 472 const u8 *ies, size_t ies_len, 473 const u8 **out_ies, size_t *out_ies_len) 474 { 475 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 476 u8 *buf; 477 size_t offs; 478 479 if (!rdev->wiphy.extended_capabilities_len || 480 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 481 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 482 if (!*out_ies) 483 return -ENOMEM; 484 *out_ies_len = ies_len; 485 return 0; 486 } 487 488 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 489 GFP_KERNEL); 490 if (!buf) 491 return -ENOMEM; 492 493 if (ies_len) { 494 static const u8 before_extcapa[] = { 495 /* not listing IEs expected to be created by driver */ 496 WLAN_EID_RSN, 497 WLAN_EID_QOS_CAPA, 498 WLAN_EID_RRM_ENABLED_CAPABILITIES, 499 WLAN_EID_MOBILITY_DOMAIN, 500 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 501 WLAN_EID_BSS_COEX_2040, 502 }; 503 504 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 505 ARRAY_SIZE(before_extcapa), 0); 506 memcpy(buf, ies, offs); 507 /* leave a whole for extended capabilities IE */ 508 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 509 ies + offs, ies_len - offs); 510 } else { 511 offs = 0; 512 } 513 514 /* place extended capabilities IE (with only driver capabilities) */ 515 buf[offs] = WLAN_EID_EXT_CAPABILITY; 516 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 517 memcpy(buf + offs + 2, 518 rdev->wiphy.extended_capabilities, 519 rdev->wiphy.extended_capabilities_len); 520 521 *out_ies = buf; 522 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 523 524 return 0; 525 } 526 527 static int cfg80211_sme_connect(struct wireless_dev *wdev, 528 struct cfg80211_connect_params *connect, 529 const u8 *prev_bssid) 530 { 531 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 532 struct cfg80211_bss *bss; 533 int err; 534 535 if (!rdev->ops->auth || !rdev->ops->assoc) 536 return -EOPNOTSUPP; 537 538 cfg80211_wdev_release_bsses(wdev); 539 540 if (wdev->connected) { 541 cfg80211_sme_free(wdev); 542 wdev->connected = false; 543 } 544 545 if (wdev->conn) 546 return -EINPROGRESS; 547 548 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 549 if (!wdev->conn) 550 return -ENOMEM; 551 552 /* 553 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 554 */ 555 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 556 if (connect->bssid) { 557 wdev->conn->params.bssid = wdev->conn->bssid; 558 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 559 } 560 561 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 562 &wdev->conn->ie, 563 &wdev->conn->params.ie_len)) { 564 kfree(wdev->conn); 565 wdev->conn = NULL; 566 return -ENOMEM; 567 } 568 wdev->conn->params.ie = wdev->conn->ie; 569 570 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 571 wdev->conn->auto_auth = true; 572 /* start with open system ... should mostly work */ 573 wdev->conn->params.auth_type = 574 NL80211_AUTHTYPE_OPEN_SYSTEM; 575 } else { 576 wdev->conn->auto_auth = false; 577 } 578 579 wdev->conn->params.ssid = wdev->u.client.ssid; 580 wdev->conn->params.ssid_len = wdev->u.client.ssid_len; 581 582 /* see if we have the bss already */ 583 bss = cfg80211_get_conn_bss(wdev); 584 585 if (prev_bssid) { 586 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 587 wdev->conn->prev_bssid_valid = true; 588 } 589 590 /* we're good if we have a matching bss struct */ 591 if (bss) { 592 enum nl80211_timeout_reason treason; 593 594 err = cfg80211_conn_do_work(wdev, &treason); 595 cfg80211_put_bss(wdev->wiphy, bss); 596 } else { 597 /* otherwise we'll need to scan for the AP first */ 598 err = cfg80211_conn_scan(wdev); 599 600 /* 601 * If we can't scan right now, then we need to scan again 602 * after the current scan finished, since the parameters 603 * changed (unless we find a good AP anyway). 604 */ 605 if (err == -EBUSY) { 606 err = 0; 607 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 608 } 609 } 610 611 if (err) 612 cfg80211_sme_free(wdev); 613 614 return err; 615 } 616 617 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 618 { 619 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 620 int err; 621 622 if (!wdev->conn) 623 return 0; 624 625 if (!rdev->ops->deauth) 626 return -EOPNOTSUPP; 627 628 if (wdev->conn->state == CFG80211_CONN_SCANNING || 629 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 630 err = 0; 631 goto out; 632 } 633 634 /* wdev->conn->params.bssid must be set if > SCANNING */ 635 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 636 wdev->conn->params.bssid, 637 NULL, 0, reason, false); 638 out: 639 cfg80211_sme_free(wdev); 640 return err; 641 } 642 643 /* 644 * code shared for in-device and software SME 645 */ 646 647 static bool cfg80211_is_all_idle(void) 648 { 649 struct cfg80211_registered_device *rdev; 650 struct wireless_dev *wdev; 651 bool is_all_idle = true; 652 653 /* 654 * All devices must be idle as otherwise if you are actively 655 * scanning some new beacon hints could be learned and would 656 * count as new regulatory hints. 657 * Also if there is any other active beaconing interface we 658 * need not issue a disconnect hint and reset any info such 659 * as chan dfs state, etc. 660 */ 661 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 662 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 663 wdev_lock(wdev); 664 if (wdev->conn || wdev->connected || 665 cfg80211_beaconing_iface_active(wdev)) 666 is_all_idle = false; 667 wdev_unlock(wdev); 668 } 669 } 670 671 return is_all_idle; 672 } 673 674 static void disconnect_work(struct work_struct *work) 675 { 676 rtnl_lock(); 677 if (cfg80211_is_all_idle()) 678 regulatory_hint_disconnect(); 679 rtnl_unlock(); 680 } 681 682 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 683 684 /* 685 * API calls for drivers implementing connect/disconnect and 686 * SME event handling 687 */ 688 689 /* This method must consume bss one way or another */ 690 void __cfg80211_connect_result(struct net_device *dev, 691 struct cfg80211_connect_resp_params *cr, 692 bool wextev) 693 { 694 struct wireless_dev *wdev = dev->ieee80211_ptr; 695 const struct element *country_elem; 696 const u8 *country_data; 697 u8 country_datalen; 698 #ifdef CONFIG_CFG80211_WEXT 699 union iwreq_data wrqu; 700 #endif 701 702 ASSERT_WDEV_LOCK(wdev); 703 704 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 705 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 706 cfg80211_put_bss(wdev->wiphy, cr->bss); 707 return; 708 } 709 710 wdev->unprot_beacon_reported = 0; 711 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 712 GFP_KERNEL); 713 714 #ifdef CONFIG_CFG80211_WEXT 715 if (wextev) { 716 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 717 memset(&wrqu, 0, sizeof(wrqu)); 718 wrqu.data.length = cr->req_ie_len; 719 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 720 cr->req_ie); 721 } 722 723 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 724 memset(&wrqu, 0, sizeof(wrqu)); 725 wrqu.data.length = cr->resp_ie_len; 726 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 727 cr->resp_ie); 728 } 729 730 memset(&wrqu, 0, sizeof(wrqu)); 731 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 732 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) { 733 memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN); 734 memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN); 735 wdev->wext.prev_bssid_valid = true; 736 } 737 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 738 } 739 #endif 740 741 if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) { 742 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 743 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid, 744 wdev->u.client.ssid, wdev->u.client.ssid_len, 745 wdev->conn_bss_type, 746 IEEE80211_PRIVACY_ANY); 747 if (cr->bss) 748 cfg80211_hold_bss(bss_from_pub(cr->bss)); 749 } 750 751 cfg80211_wdev_release_bsses(wdev); 752 753 if (cr->status != WLAN_STATUS_SUCCESS) { 754 kfree_sensitive(wdev->connect_keys); 755 wdev->connect_keys = NULL; 756 wdev->u.client.ssid_len = 0; 757 wdev->conn_owner_nlportid = 0; 758 if (cr->bss) { 759 cfg80211_unhold_bss(bss_from_pub(cr->bss)); 760 cfg80211_put_bss(wdev->wiphy, cr->bss); 761 } 762 cfg80211_sme_free(wdev); 763 return; 764 } 765 766 if (WARN_ON(!cr->bss)) 767 return; 768 769 wdev->links[0].client.current_bss = bss_from_pub(cr->bss); 770 wdev->connected = true; 771 ether_addr_copy(wdev->u.client.connected_addr, cr->bss->bssid); 772 773 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP)) 774 cfg80211_upload_connect_keys(wdev); 775 776 rcu_read_lock(); 777 country_elem = ieee80211_bss_get_elem(cr->bss, WLAN_EID_COUNTRY); 778 if (!country_elem) { 779 rcu_read_unlock(); 780 return; 781 } 782 783 country_datalen = country_elem->datalen; 784 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 785 rcu_read_unlock(); 786 787 if (!country_data) 788 return; 789 790 regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band, 791 country_data, country_datalen); 792 kfree(country_data); 793 } 794 795 /* Consumes bss object one way or another */ 796 void cfg80211_connect_done(struct net_device *dev, 797 struct cfg80211_connect_resp_params *params, 798 gfp_t gfp) 799 { 800 struct wireless_dev *wdev = dev->ieee80211_ptr; 801 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 802 struct cfg80211_event *ev; 803 unsigned long flags; 804 u8 *next; 805 806 if (params->bss) { 807 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss); 808 809 if (list_empty(&ibss->list)) { 810 struct cfg80211_bss *found = NULL, *tmp = params->bss; 811 812 found = cfg80211_get_bss(wdev->wiphy, NULL, 813 params->bss->bssid, 814 wdev->u.client.ssid, wdev->u.client.ssid_len, 815 wdev->conn_bss_type, 816 IEEE80211_PRIVACY_ANY); 817 if (found) { 818 /* The same BSS is already updated so use it 819 * instead, as it has latest info. 820 */ 821 params->bss = found; 822 } else { 823 /* Update with BSS provided by driver, it will 824 * be freshly added and ref cnted, we can free 825 * the old one. 826 * 827 * signal_valid can be false, as we are not 828 * expecting the BSS to be found. 829 * 830 * keep the old timestamp to avoid confusion 831 */ 832 cfg80211_bss_update(rdev, ibss, false, 833 ibss->ts); 834 } 835 836 cfg80211_put_bss(wdev->wiphy, tmp); 837 } 838 } 839 840 ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) + 841 params->req_ie_len + params->resp_ie_len + 842 params->fils.kek_len + params->fils.pmk_len + 843 (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 844 if (!ev) { 845 cfg80211_put_bss(wdev->wiphy, params->bss); 846 return; 847 } 848 849 ev->type = EVENT_CONNECT_RESULT; 850 next = ((u8 *)ev) + sizeof(*ev); 851 if (params->bssid) { 852 ev->cr.bssid = next; 853 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN); 854 next += ETH_ALEN; 855 } 856 if (params->req_ie_len) { 857 ev->cr.req_ie = next; 858 ev->cr.req_ie_len = params->req_ie_len; 859 memcpy((void *)ev->cr.req_ie, params->req_ie, 860 params->req_ie_len); 861 next += params->req_ie_len; 862 } 863 if (params->resp_ie_len) { 864 ev->cr.resp_ie = next; 865 ev->cr.resp_ie_len = params->resp_ie_len; 866 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 867 params->resp_ie_len); 868 next += params->resp_ie_len; 869 } 870 if (params->fils.kek_len) { 871 ev->cr.fils.kek = next; 872 ev->cr.fils.kek_len = params->fils.kek_len; 873 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 874 params->fils.kek_len); 875 next += params->fils.kek_len; 876 } 877 if (params->fils.pmk_len) { 878 ev->cr.fils.pmk = next; 879 ev->cr.fils.pmk_len = params->fils.pmk_len; 880 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 881 params->fils.pmk_len); 882 next += params->fils.pmk_len; 883 } 884 if (params->fils.pmkid) { 885 ev->cr.fils.pmkid = next; 886 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 887 WLAN_PMKID_LEN); 888 next += WLAN_PMKID_LEN; 889 } 890 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 891 if (params->fils.update_erp_next_seq_num) 892 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 893 if (params->bss) 894 cfg80211_hold_bss(bss_from_pub(params->bss)); 895 ev->cr.bss = params->bss; 896 ev->cr.status = params->status; 897 ev->cr.timeout_reason = params->timeout_reason; 898 899 spin_lock_irqsave(&wdev->event_lock, flags); 900 list_add_tail(&ev->list, &wdev->event_list); 901 spin_unlock_irqrestore(&wdev->event_lock, flags); 902 queue_work(cfg80211_wq, &rdev->event_work); 903 } 904 EXPORT_SYMBOL(cfg80211_connect_done); 905 906 /* Consumes bss object one way or another */ 907 void __cfg80211_roamed(struct wireless_dev *wdev, 908 struct cfg80211_roam_info *info) 909 { 910 #ifdef CONFIG_CFG80211_WEXT 911 union iwreq_data wrqu; 912 #endif 913 ASSERT_WDEV_LOCK(wdev); 914 915 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 916 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 917 goto out; 918 919 if (WARN_ON(!wdev->connected)) 920 goto out; 921 922 cfg80211_wdev_release_bsses(wdev); 923 924 if (WARN_ON(!info->bss)) 925 return; 926 927 cfg80211_hold_bss(bss_from_pub(info->bss)); 928 wdev->links[0].client.current_bss = bss_from_pub(info->bss); 929 ether_addr_copy(wdev->u.client.connected_addr, info->bss->bssid); 930 931 wdev->unprot_beacon_reported = 0; 932 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 933 wdev->netdev, info, GFP_KERNEL); 934 935 #ifdef CONFIG_CFG80211_WEXT 936 if (info->req_ie) { 937 memset(&wrqu, 0, sizeof(wrqu)); 938 wrqu.data.length = info->req_ie_len; 939 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 940 &wrqu, info->req_ie); 941 } 942 943 if (info->resp_ie) { 944 memset(&wrqu, 0, sizeof(wrqu)); 945 wrqu.data.length = info->resp_ie_len; 946 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 947 &wrqu, info->resp_ie); 948 } 949 950 memset(&wrqu, 0, sizeof(wrqu)); 951 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 952 memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN); 953 memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN); 954 wdev->wext.prev_bssid_valid = true; 955 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 956 #endif 957 958 return; 959 out: 960 cfg80211_put_bss(wdev->wiphy, info->bss); 961 } 962 963 /* Consumes info->bss object one way or another */ 964 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 965 gfp_t gfp) 966 { 967 struct wireless_dev *wdev = dev->ieee80211_ptr; 968 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 969 struct cfg80211_event *ev; 970 unsigned long flags; 971 u8 *next; 972 973 if (!info->bss) { 974 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel, 975 info->bssid, wdev->u.client.ssid, 976 wdev->u.client.ssid_len, 977 wdev->conn_bss_type, 978 IEEE80211_PRIVACY_ANY); 979 } 980 981 if (WARN_ON(!info->bss)) 982 return; 983 984 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 985 info->fils.kek_len + info->fils.pmk_len + 986 (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 987 if (!ev) { 988 cfg80211_put_bss(wdev->wiphy, info->bss); 989 return; 990 } 991 992 ev->type = EVENT_ROAMED; 993 next = ((u8 *)ev) + sizeof(*ev); 994 if (info->req_ie_len) { 995 ev->rm.req_ie = next; 996 ev->rm.req_ie_len = info->req_ie_len; 997 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 998 next += info->req_ie_len; 999 } 1000 if (info->resp_ie_len) { 1001 ev->rm.resp_ie = next; 1002 ev->rm.resp_ie_len = info->resp_ie_len; 1003 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1004 info->resp_ie_len); 1005 next += info->resp_ie_len; 1006 } 1007 if (info->fils.kek_len) { 1008 ev->rm.fils.kek = next; 1009 ev->rm.fils.kek_len = info->fils.kek_len; 1010 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1011 info->fils.kek_len); 1012 next += info->fils.kek_len; 1013 } 1014 if (info->fils.pmk_len) { 1015 ev->rm.fils.pmk = next; 1016 ev->rm.fils.pmk_len = info->fils.pmk_len; 1017 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1018 info->fils.pmk_len); 1019 next += info->fils.pmk_len; 1020 } 1021 if (info->fils.pmkid) { 1022 ev->rm.fils.pmkid = next; 1023 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1024 WLAN_PMKID_LEN); 1025 next += WLAN_PMKID_LEN; 1026 } 1027 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1028 if (info->fils.update_erp_next_seq_num) 1029 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1030 ev->rm.bss = info->bss; 1031 1032 spin_lock_irqsave(&wdev->event_lock, flags); 1033 list_add_tail(&ev->list, &wdev->event_list); 1034 spin_unlock_irqrestore(&wdev->event_lock, flags); 1035 queue_work(cfg80211_wq, &rdev->event_work); 1036 } 1037 EXPORT_SYMBOL(cfg80211_roamed); 1038 1039 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid) 1040 { 1041 ASSERT_WDEV_LOCK(wdev); 1042 1043 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) 1044 return; 1045 1046 if (WARN_ON(!wdev->connected) || 1047 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid))) 1048 return; 1049 1050 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1051 bssid); 1052 } 1053 1054 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1055 gfp_t gfp) 1056 { 1057 struct wireless_dev *wdev = dev->ieee80211_ptr; 1058 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1059 struct cfg80211_event *ev; 1060 unsigned long flags; 1061 1062 if (WARN_ON(!bssid)) 1063 return; 1064 1065 ev = kzalloc(sizeof(*ev), gfp); 1066 if (!ev) 1067 return; 1068 1069 ev->type = EVENT_PORT_AUTHORIZED; 1070 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1071 1072 /* 1073 * Use the wdev event list so that if there are pending 1074 * connected/roamed events, they will be reported first. 1075 */ 1076 spin_lock_irqsave(&wdev->event_lock, flags); 1077 list_add_tail(&ev->list, &wdev->event_list); 1078 spin_unlock_irqrestore(&wdev->event_lock, flags); 1079 queue_work(cfg80211_wq, &rdev->event_work); 1080 } 1081 EXPORT_SYMBOL(cfg80211_port_authorized); 1082 1083 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1084 size_t ie_len, u16 reason, bool from_ap) 1085 { 1086 struct wireless_dev *wdev = dev->ieee80211_ptr; 1087 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1088 int i; 1089 #ifdef CONFIG_CFG80211_WEXT 1090 union iwreq_data wrqu; 1091 #endif 1092 1093 ASSERT_WDEV_LOCK(wdev); 1094 1095 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1096 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1097 return; 1098 1099 cfg80211_wdev_release_bsses(wdev); 1100 wdev->connected = false; 1101 wdev->u.client.ssid_len = 0; 1102 wdev->conn_owner_nlportid = 0; 1103 kfree_sensitive(wdev->connect_keys); 1104 wdev->connect_keys = NULL; 1105 1106 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1107 1108 /* stop critical protocol if supported */ 1109 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1110 rdev->crit_proto_nlportid = 0; 1111 rdev_crit_proto_stop(rdev, wdev); 1112 } 1113 1114 /* 1115 * Delete all the keys ... pairwise keys can't really 1116 * exist any more anyway, but default keys might. 1117 */ 1118 if (rdev->ops->del_key) { 1119 int max_key_idx = 5; 1120 1121 if (wiphy_ext_feature_isset( 1122 wdev->wiphy, 1123 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1124 wiphy_ext_feature_isset( 1125 wdev->wiphy, 1126 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1127 max_key_idx = 7; 1128 for (i = 0; i <= max_key_idx; i++) 1129 rdev_del_key(rdev, dev, i, false, NULL); 1130 } 1131 1132 rdev_set_qos_map(rdev, dev, NULL); 1133 1134 #ifdef CONFIG_CFG80211_WEXT 1135 memset(&wrqu, 0, sizeof(wrqu)); 1136 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1137 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1138 wdev->wext.connect.ssid_len = 0; 1139 #endif 1140 1141 schedule_work(&cfg80211_disconnect_work); 1142 } 1143 1144 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1145 const u8 *ie, size_t ie_len, 1146 bool locally_generated, gfp_t gfp) 1147 { 1148 struct wireless_dev *wdev = dev->ieee80211_ptr; 1149 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1150 struct cfg80211_event *ev; 1151 unsigned long flags; 1152 1153 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1154 if (!ev) 1155 return; 1156 1157 ev->type = EVENT_DISCONNECTED; 1158 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1159 ev->dc.ie_len = ie_len; 1160 memcpy((void *)ev->dc.ie, ie, ie_len); 1161 ev->dc.reason = reason; 1162 ev->dc.locally_generated = locally_generated; 1163 1164 spin_lock_irqsave(&wdev->event_lock, flags); 1165 list_add_tail(&ev->list, &wdev->event_list); 1166 spin_unlock_irqrestore(&wdev->event_lock, flags); 1167 queue_work(cfg80211_wq, &rdev->event_work); 1168 } 1169 EXPORT_SYMBOL(cfg80211_disconnected); 1170 1171 /* 1172 * API calls for nl80211/wext compatibility code 1173 */ 1174 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1175 struct net_device *dev, 1176 struct cfg80211_connect_params *connect, 1177 struct cfg80211_cached_keys *connkeys, 1178 const u8 *prev_bssid) 1179 { 1180 struct wireless_dev *wdev = dev->ieee80211_ptr; 1181 int err; 1182 1183 ASSERT_WDEV_LOCK(wdev); 1184 1185 /* 1186 * If we have an ssid_len, we're trying to connect or are 1187 * already connected, so reject a new SSID unless it's the 1188 * same (which is the case for re-association.) 1189 */ 1190 if (wdev->u.client.ssid_len && 1191 (wdev->u.client.ssid_len != connect->ssid_len || 1192 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) 1193 return -EALREADY; 1194 1195 /* 1196 * If connected, reject (re-)association unless prev_bssid 1197 * matches the current BSSID. 1198 */ 1199 if (wdev->connected) { 1200 if (!prev_bssid) 1201 return -EALREADY; 1202 if (!ether_addr_equal(prev_bssid, 1203 wdev->u.client.connected_addr)) 1204 return -ENOTCONN; 1205 } 1206 1207 /* 1208 * Reject if we're in the process of connecting with WEP, 1209 * this case isn't very interesting and trying to handle 1210 * it would make the code much more complex. 1211 */ 1212 if (wdev->connect_keys) 1213 return -EINPROGRESS; 1214 1215 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1216 rdev->wiphy.ht_capa_mod_mask); 1217 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1218 rdev->wiphy.vht_capa_mod_mask); 1219 1220 if (connkeys && connkeys->def >= 0) { 1221 int idx; 1222 u32 cipher; 1223 1224 idx = connkeys->def; 1225 cipher = connkeys->params[idx].cipher; 1226 /* If given a WEP key we may need it for shared key auth */ 1227 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1228 cipher == WLAN_CIPHER_SUITE_WEP104) { 1229 connect->key_idx = idx; 1230 connect->key = connkeys->params[idx].key; 1231 connect->key_len = connkeys->params[idx].key_len; 1232 1233 /* 1234 * If ciphers are not set (e.g. when going through 1235 * iwconfig), we have to set them appropriately here. 1236 */ 1237 if (connect->crypto.cipher_group == 0) 1238 connect->crypto.cipher_group = cipher; 1239 1240 if (connect->crypto.n_ciphers_pairwise == 0) { 1241 connect->crypto.n_ciphers_pairwise = 1; 1242 connect->crypto.ciphers_pairwise[0] = cipher; 1243 } 1244 } 1245 1246 connect->crypto.wep_keys = connkeys->params; 1247 connect->crypto.wep_tx_key = connkeys->def; 1248 } else { 1249 if (WARN_ON(connkeys)) 1250 return -EINVAL; 1251 } 1252 1253 wdev->connect_keys = connkeys; 1254 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); 1255 wdev->u.client.ssid_len = connect->ssid_len; 1256 1257 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1258 IEEE80211_BSS_TYPE_ESS; 1259 1260 if (!rdev->ops->connect) 1261 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1262 else 1263 err = rdev_connect(rdev, dev, connect); 1264 1265 if (err) { 1266 wdev->connect_keys = NULL; 1267 /* 1268 * This could be reassoc getting refused, don't clear 1269 * ssid_len in that case. 1270 */ 1271 if (!wdev->connected) 1272 wdev->u.client.ssid_len = 0; 1273 return err; 1274 } 1275 1276 return 0; 1277 } 1278 1279 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1280 struct net_device *dev, u16 reason, bool wextev) 1281 { 1282 struct wireless_dev *wdev = dev->ieee80211_ptr; 1283 int err = 0; 1284 1285 ASSERT_WDEV_LOCK(wdev); 1286 1287 kfree_sensitive(wdev->connect_keys); 1288 wdev->connect_keys = NULL; 1289 1290 wdev->conn_owner_nlportid = 0; 1291 1292 if (wdev->conn) 1293 err = cfg80211_sme_disconnect(wdev, reason); 1294 else if (!rdev->ops->disconnect) 1295 cfg80211_mlme_down(rdev, dev); 1296 else if (wdev->u.client.ssid_len) 1297 err = rdev_disconnect(rdev, dev, reason); 1298 1299 /* 1300 * Clear ssid_len unless we actually were fully connected, 1301 * in which case cfg80211_disconnected() will take care of 1302 * this later. 1303 */ 1304 if (!wdev->connected) 1305 wdev->u.client.ssid_len = 0; 1306 1307 return err; 1308 } 1309 1310 /* 1311 * Used to clean up after the connection / connection attempt owner socket 1312 * disconnects 1313 */ 1314 void cfg80211_autodisconnect_wk(struct work_struct *work) 1315 { 1316 struct wireless_dev *wdev = 1317 container_of(work, struct wireless_dev, disconnect_wk); 1318 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1319 1320 wdev_lock(wdev); 1321 1322 if (wdev->conn_owner_nlportid) { 1323 switch (wdev->iftype) { 1324 case NL80211_IFTYPE_ADHOC: 1325 __cfg80211_leave_ibss(rdev, wdev->netdev, false); 1326 break; 1327 case NL80211_IFTYPE_AP: 1328 case NL80211_IFTYPE_P2P_GO: 1329 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false); 1330 break; 1331 case NL80211_IFTYPE_MESH_POINT: 1332 __cfg80211_leave_mesh(rdev, wdev->netdev); 1333 break; 1334 case NL80211_IFTYPE_STATION: 1335 case NL80211_IFTYPE_P2P_CLIENT: 1336 /* 1337 * Use disconnect_bssid if still connecting and 1338 * ops->disconnect not implemented. Otherwise we can 1339 * use cfg80211_disconnect. 1340 */ 1341 if (rdev->ops->disconnect || wdev->connected) 1342 cfg80211_disconnect(rdev, wdev->netdev, 1343 WLAN_REASON_DEAUTH_LEAVING, 1344 true); 1345 else 1346 cfg80211_mlme_deauth(rdev, wdev->netdev, 1347 wdev->disconnect_bssid, 1348 NULL, 0, 1349 WLAN_REASON_DEAUTH_LEAVING, 1350 false); 1351 break; 1352 default: 1353 break; 1354 } 1355 } 1356 1357 wdev_unlock(wdev); 1358 } 1359