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 31struct 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 54static 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 64static 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 146static 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 fallthrough; 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 fallthrough; 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 228void 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 272static void cfg80211_step_auth_next(struct cfg80211_conn *conn, 273 struct cfg80211_bss *bss) 274{ 275 memcpy(conn->bssid, bss->bssid, ETH_ALEN); 276 conn->params.bssid = conn->bssid; 277 conn->params.channel = bss->channel; 278 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 279} 280 281/* Returned bss is reference counted and must be cleaned up appropriately. */ 282static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 283{ 284 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 285 struct cfg80211_bss *bss; 286 287 ASSERT_WDEV_LOCK(wdev); 288 289 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 290 wdev->conn->params.bssid, 291 wdev->conn->params.ssid, 292 wdev->conn->params.ssid_len, 293 wdev->conn_bss_type, 294 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 295 if (!bss) 296 return NULL; 297 298 cfg80211_step_auth_next(wdev->conn, bss); 299 schedule_work(&rdev->conn_work); 300 301 return bss; 302} 303 304static void __cfg80211_sme_scan_done(struct net_device *dev) 305{ 306 struct wireless_dev *wdev = dev->ieee80211_ptr; 307 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 308 struct cfg80211_bss *bss; 309 310 ASSERT_WDEV_LOCK(wdev); 311 312 if (!wdev->conn) 313 return; 314 315 if (wdev->conn->state != CFG80211_CONN_SCANNING && 316 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 317 return; 318 319 bss = cfg80211_get_conn_bss(wdev); 320 if (bss) 321 cfg80211_put_bss(&rdev->wiphy, bss); 322 else 323 schedule_work(&rdev->conn_work); 324} 325 326void cfg80211_sme_scan_done(struct net_device *dev) 327{ 328 struct wireless_dev *wdev = dev->ieee80211_ptr; 329 330 wdev_lock(wdev); 331 __cfg80211_sme_scan_done(dev); 332 wdev_unlock(wdev); 333} 334 335void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 336{ 337 struct wiphy *wiphy = wdev->wiphy; 338 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 339 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 340 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 341 342 ASSERT_WDEV_LOCK(wdev); 343 344 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 345 return; 346 347 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 348 wdev->conn->auto_auth && 349 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 350 /* select automatically between only open, shared, leap */ 351 switch (wdev->conn->params.auth_type) { 352 case NL80211_AUTHTYPE_OPEN_SYSTEM: 353 if (wdev->connect_keys) 354 wdev->conn->params.auth_type = 355 NL80211_AUTHTYPE_SHARED_KEY; 356 else 357 wdev->conn->params.auth_type = 358 NL80211_AUTHTYPE_NETWORK_EAP; 359 break; 360 case NL80211_AUTHTYPE_SHARED_KEY: 361 wdev->conn->params.auth_type = 362 NL80211_AUTHTYPE_NETWORK_EAP; 363 break; 364 default: 365 /* huh? */ 366 wdev->conn->params.auth_type = 367 NL80211_AUTHTYPE_OPEN_SYSTEM; 368 break; 369 } 370 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 371 schedule_work(&rdev->conn_work); 372 } else if (status_code != WLAN_STATUS_SUCCESS) { 373 struct cfg80211_connect_resp_params cr; 374 375 memset(&cr, 0, sizeof(cr)); 376 cr.status = status_code; 377 cr.bssid = mgmt->bssid; 378 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 379 __cfg80211_connect_result(wdev->netdev, &cr, false); 380 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 381 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 382 schedule_work(&rdev->conn_work); 383 } 384} 385 386bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 387{ 388 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 389 390 if (!wdev->conn) 391 return false; 392 393 if (status == WLAN_STATUS_SUCCESS) { 394 wdev->conn->state = CFG80211_CONN_CONNECTED; 395 return false; 396 } 397 398 if (wdev->conn->prev_bssid_valid) { 399 /* 400 * Some stupid APs don't accept reassoc, so we 401 * need to fall back to trying regular assoc; 402 * return true so no event is sent to userspace. 403 */ 404 wdev->conn->prev_bssid_valid = false; 405 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 406 schedule_work(&rdev->conn_work); 407 return true; 408 } 409 410 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 411 schedule_work(&rdev->conn_work); 412 return false; 413} 414 415void cfg80211_sme_deauth(struct wireless_dev *wdev) 416{ 417 cfg80211_sme_free(wdev); 418} 419 420void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 421{ 422 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 423 424 if (!wdev->conn) 425 return; 426 427 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 428 schedule_work(&rdev->conn_work); 429} 430 431void cfg80211_sme_disassoc(struct wireless_dev *wdev) 432{ 433 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 434 435 if (!wdev->conn) 436 return; 437 438 wdev->conn->state = CFG80211_CONN_DEAUTH; 439 schedule_work(&rdev->conn_work); 440} 441 442void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 443{ 444 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 445 446 if (!wdev->conn) 447 return; 448 449 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; 450 schedule_work(&rdev->conn_work); 451} 452 453void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) 454{ 455 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 456 457 if (!wdev->conn) 458 return; 459 460 wdev->conn->state = CFG80211_CONN_ABANDON; 461 schedule_work(&rdev->conn_work); 462} 463 464static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 465 const u8 *ies, size_t ies_len, 466 const u8 **out_ies, size_t *out_ies_len) 467{ 468 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 469 u8 *buf; 470 size_t offs; 471 472 if (!rdev->wiphy.extended_capabilities_len || 473 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 474 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 475 if (!*out_ies) 476 return -ENOMEM; 477 *out_ies_len = ies_len; 478 return 0; 479 } 480 481 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 482 GFP_KERNEL); 483 if (!buf) 484 return -ENOMEM; 485 486 if (ies_len) { 487 static const u8 before_extcapa[] = { 488 /* not listing IEs expected to be created by driver */ 489 WLAN_EID_RSN, 490 WLAN_EID_QOS_CAPA, 491 WLAN_EID_RRM_ENABLED_CAPABILITIES, 492 WLAN_EID_MOBILITY_DOMAIN, 493 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 494 WLAN_EID_BSS_COEX_2040, 495 }; 496 497 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 498 ARRAY_SIZE(before_extcapa), 0); 499 memcpy(buf, ies, offs); 500 /* leave a whole for extended capabilities IE */ 501 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 502 ies + offs, ies_len - offs); 503 } else { 504 offs = 0; 505 } 506 507 /* place extended capabilities IE (with only driver capabilities) */ 508 buf[offs] = WLAN_EID_EXT_CAPABILITY; 509 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 510 memcpy(buf + offs + 2, 511 rdev->wiphy.extended_capabilities, 512 rdev->wiphy.extended_capabilities_len); 513 514 *out_ies = buf; 515 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 516 517 return 0; 518} 519 520static int cfg80211_sme_connect(struct wireless_dev *wdev, 521 struct cfg80211_connect_params *connect, 522 const u8 *prev_bssid) 523{ 524 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 525 struct cfg80211_bss *bss; 526 int err; 527 528 if (!rdev->ops->auth || !rdev->ops->assoc) 529 return -EOPNOTSUPP; 530 531 if (wdev->current_bss) { 532 cfg80211_unhold_bss(wdev->current_bss); 533 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 534 wdev->current_bss = NULL; 535 536 cfg80211_sme_free(wdev); 537 } 538 539 if (wdev->conn) 540 return -EINPROGRESS; 541 542 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 543 if (!wdev->conn) 544 return -ENOMEM; 545 546 /* 547 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 548 */ 549 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 550 if (connect->bssid) { 551 wdev->conn->params.bssid = wdev->conn->bssid; 552 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 553 } 554 555 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 556 &wdev->conn->ie, 557 &wdev->conn->params.ie_len)) { 558 kfree(wdev->conn); 559 wdev->conn = NULL; 560 return -ENOMEM; 561 } 562 wdev->conn->params.ie = wdev->conn->ie; 563 564 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 565 wdev->conn->auto_auth = true; 566 /* start with open system ... should mostly work */ 567 wdev->conn->params.auth_type = 568 NL80211_AUTHTYPE_OPEN_SYSTEM; 569 } else { 570 wdev->conn->auto_auth = false; 571 } 572 573 wdev->conn->params.ssid = wdev->ssid; 574 wdev->conn->params.ssid_len = wdev->ssid_len; 575 576 /* see if we have the bss already */ 577 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 578 wdev->conn->params.bssid, 579 wdev->conn->params.ssid, 580 wdev->conn->params.ssid_len, 581 wdev->conn_bss_type, 582 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 583 584 if (prev_bssid) { 585 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 586 wdev->conn->prev_bssid_valid = true; 587 } 588 589 /* we're good if we have a matching bss struct */ 590 if (bss) { 591 enum nl80211_timeout_reason treason; 592 593 cfg80211_step_auth_next(wdev->conn, bss); 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 617static 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 647static 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->current_bss || 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 674static 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 682DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 683 684 685/* 686 * API calls for drivers implementing connect/disconnect and 687 * SME event handling 688 */ 689 690/* This method must consume bss one way or another */ 691void __cfg80211_connect_result(struct net_device *dev, 692 struct cfg80211_connect_resp_params *cr, 693 bool wextev) 694{ 695 struct wireless_dev *wdev = dev->ieee80211_ptr; 696 const u8 *country_ie; 697#ifdef CONFIG_CFG80211_WEXT 698 union iwreq_data wrqu; 699#endif 700 701 ASSERT_WDEV_LOCK(wdev); 702 703 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 704 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 705 cfg80211_put_bss(wdev->wiphy, cr->bss); 706 return; 707 } 708 709 wdev->unprot_beacon_reported = 0; 710 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 711 GFP_KERNEL); 712 713#ifdef CONFIG_CFG80211_WEXT 714 if (wextev) { 715 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 716 memset(&wrqu, 0, sizeof(wrqu)); 717 wrqu.data.length = cr->req_ie_len; 718 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 719 cr->req_ie); 720 } 721 722 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 723 memset(&wrqu, 0, sizeof(wrqu)); 724 wrqu.data.length = cr->resp_ie_len; 725 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 726 cr->resp_ie); 727 } 728 729 memset(&wrqu, 0, sizeof(wrqu)); 730 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 731 if (cr->bssid && cr->status == WLAN_STATUS_SUCCESS) { 732 memcpy(wrqu.ap_addr.sa_data, cr->bssid, ETH_ALEN); 733 memcpy(wdev->wext.prev_bssid, cr->bssid, ETH_ALEN); 734 wdev->wext.prev_bssid_valid = true; 735 } 736 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 737 } 738#endif 739 740 if (!cr->bss && (cr->status == WLAN_STATUS_SUCCESS)) { 741 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 742 cr->bss = cfg80211_get_bss(wdev->wiphy, NULL, cr->bssid, 743 wdev->ssid, wdev->ssid_len, 744 wdev->conn_bss_type, 745 IEEE80211_PRIVACY_ANY); 746 if (cr->bss) 747 cfg80211_hold_bss(bss_from_pub(cr->bss)); 748 } 749 750 if (wdev->current_bss) { 751 cfg80211_unhold_bss(wdev->current_bss); 752 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 753 wdev->current_bss = NULL; 754 } 755 756 if (cr->status != WLAN_STATUS_SUCCESS) { 757 kfree_sensitive(wdev->connect_keys); 758 wdev->connect_keys = NULL; 759 wdev->ssid_len = 0; 760 wdev->conn_owner_nlportid = 0; 761 if (cr->bss) { 762 cfg80211_unhold_bss(bss_from_pub(cr->bss)); 763 cfg80211_put_bss(wdev->wiphy, cr->bss); 764 } 765 cfg80211_sme_free(wdev); 766 return; 767 } 768 769 if (WARN_ON(!cr->bss)) 770 return; 771 772 wdev->current_bss = bss_from_pub(cr->bss); 773 774 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP)) 775 cfg80211_upload_connect_keys(wdev); 776 777 rcu_read_lock(); 778 country_ie = ieee80211_bss_get_ie(cr->bss, WLAN_EID_COUNTRY); 779 if (!country_ie) { 780 rcu_read_unlock(); 781 return; 782 } 783 784 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 785 rcu_read_unlock(); 786 787 if (!country_ie) 788 return; 789 790 /* 791 * ieee80211_bss_get_ie() ensures we can access: 792 * - country_ie + 2, the start of the country ie data, and 793 * - and country_ie[1] which is the IE length 794 */ 795 regulatory_hint_country_ie(wdev->wiphy, cr->bss->channel->band, 796 country_ie + 2, country_ie[1]); 797 kfree(country_ie); 798} 799 800/* Consumes bss object one way or another */ 801void cfg80211_connect_done(struct net_device *dev, 802 struct cfg80211_connect_resp_params *params, 803 gfp_t gfp) 804{ 805 struct wireless_dev *wdev = dev->ieee80211_ptr; 806 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 807 struct cfg80211_event *ev; 808 unsigned long flags; 809 u8 *next; 810 811 if (params->bss) { 812 struct cfg80211_internal_bss *ibss = bss_from_pub(params->bss); 813 814 if (list_empty(&ibss->list)) { 815 struct cfg80211_bss *found = NULL, *tmp = params->bss; 816 817 found = cfg80211_get_bss(wdev->wiphy, NULL, 818 params->bss->bssid, 819 wdev->ssid, wdev->ssid_len, 820 wdev->conn_bss_type, 821 IEEE80211_PRIVACY_ANY); 822 if (found) { 823 /* The same BSS is already updated so use it 824 * instead, as it has latest info. 825 */ 826 params->bss = found; 827 } else { 828 /* Update with BSS provided by driver, it will 829 * be freshly added and ref cnted, we can free 830 * the old one. 831 * 832 * signal_valid can be false, as we are not 833 * expecting the BSS to be found. 834 * 835 * keep the old timestamp to avoid confusion 836 */ 837 cfg80211_bss_update(rdev, ibss, false, 838 ibss->ts); 839 } 840 841 cfg80211_put_bss(wdev->wiphy, tmp); 842 } 843 } 844 845 ev = kzalloc(sizeof(*ev) + (params->bssid ? ETH_ALEN : 0) + 846 params->req_ie_len + params->resp_ie_len + 847 params->fils.kek_len + params->fils.pmk_len + 848 (params->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 849 if (!ev) { 850 cfg80211_put_bss(wdev->wiphy, params->bss); 851 return; 852 } 853 854 ev->type = EVENT_CONNECT_RESULT; 855 next = ((u8 *)ev) + sizeof(*ev); 856 if (params->bssid) { 857 ev->cr.bssid = next; 858 memcpy((void *)ev->cr.bssid, params->bssid, ETH_ALEN); 859 next += ETH_ALEN; 860 } 861 if (params->req_ie_len) { 862 ev->cr.req_ie = next; 863 ev->cr.req_ie_len = params->req_ie_len; 864 memcpy((void *)ev->cr.req_ie, params->req_ie, 865 params->req_ie_len); 866 next += params->req_ie_len; 867 } 868 if (params->resp_ie_len) { 869 ev->cr.resp_ie = next; 870 ev->cr.resp_ie_len = params->resp_ie_len; 871 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 872 params->resp_ie_len); 873 next += params->resp_ie_len; 874 } 875 if (params->fils.kek_len) { 876 ev->cr.fils.kek = next; 877 ev->cr.fils.kek_len = params->fils.kek_len; 878 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 879 params->fils.kek_len); 880 next += params->fils.kek_len; 881 } 882 if (params->fils.pmk_len) { 883 ev->cr.fils.pmk = next; 884 ev->cr.fils.pmk_len = params->fils.pmk_len; 885 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 886 params->fils.pmk_len); 887 next += params->fils.pmk_len; 888 } 889 if (params->fils.pmkid) { 890 ev->cr.fils.pmkid = next; 891 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 892 WLAN_PMKID_LEN); 893 next += WLAN_PMKID_LEN; 894 } 895 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 896 if (params->fils.update_erp_next_seq_num) 897 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 898 if (params->bss) 899 cfg80211_hold_bss(bss_from_pub(params->bss)); 900 ev->cr.bss = params->bss; 901 ev->cr.status = params->status; 902 ev->cr.timeout_reason = params->timeout_reason; 903 904 spin_lock_irqsave(&wdev->event_lock, flags); 905 list_add_tail(&ev->list, &wdev->event_list); 906 spin_unlock_irqrestore(&wdev->event_lock, flags); 907 queue_work(cfg80211_wq, &rdev->event_work); 908} 909EXPORT_SYMBOL(cfg80211_connect_done); 910 911/* Consumes bss object one way or another */ 912void __cfg80211_roamed(struct wireless_dev *wdev, 913 struct cfg80211_roam_info *info) 914{ 915#ifdef CONFIG_CFG80211_WEXT 916 union iwreq_data wrqu; 917#endif 918 ASSERT_WDEV_LOCK(wdev); 919 920 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 921 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 922 goto out; 923 924 if (WARN_ON(!wdev->current_bss)) 925 goto out; 926 927 cfg80211_unhold_bss(wdev->current_bss); 928 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 929 wdev->current_bss = NULL; 930 931 if (WARN_ON(!info->bss)) 932 return; 933 934 cfg80211_hold_bss(bss_from_pub(info->bss)); 935 wdev->current_bss = bss_from_pub(info->bss); 936 937 wdev->unprot_beacon_reported = 0; 938 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 939 wdev->netdev, info, GFP_KERNEL); 940 941#ifdef CONFIG_CFG80211_WEXT 942 if (info->req_ie) { 943 memset(&wrqu, 0, sizeof(wrqu)); 944 wrqu.data.length = info->req_ie_len; 945 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 946 &wrqu, info->req_ie); 947 } 948 949 if (info->resp_ie) { 950 memset(&wrqu, 0, sizeof(wrqu)); 951 wrqu.data.length = info->resp_ie_len; 952 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 953 &wrqu, info->resp_ie); 954 } 955 956 memset(&wrqu, 0, sizeof(wrqu)); 957 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 958 memcpy(wrqu.ap_addr.sa_data, info->bss->bssid, ETH_ALEN); 959 memcpy(wdev->wext.prev_bssid, info->bss->bssid, ETH_ALEN); 960 wdev->wext.prev_bssid_valid = true; 961 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 962#endif 963 964 return; 965out: 966 cfg80211_put_bss(wdev->wiphy, info->bss); 967} 968 969/* Consumes info->bss object one way or another */ 970void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 971 gfp_t gfp) 972{ 973 struct wireless_dev *wdev = dev->ieee80211_ptr; 974 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 975 struct cfg80211_event *ev; 976 unsigned long flags; 977 u8 *next; 978 979 if (!info->bss) { 980 info->bss = cfg80211_get_bss(wdev->wiphy, info->channel, 981 info->bssid, wdev->ssid, 982 wdev->ssid_len, 983 wdev->conn_bss_type, 984 IEEE80211_PRIVACY_ANY); 985 } 986 987 if (WARN_ON(!info->bss)) 988 return; 989 990 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 991 info->fils.kek_len + info->fils.pmk_len + 992 (info->fils.pmkid ? WLAN_PMKID_LEN : 0), gfp); 993 if (!ev) { 994 cfg80211_put_bss(wdev->wiphy, info->bss); 995 return; 996 } 997 998 ev->type = EVENT_ROAMED; 999 next = ((u8 *)ev) + sizeof(*ev); 1000 if (info->req_ie_len) { 1001 ev->rm.req_ie = next; 1002 ev->rm.req_ie_len = info->req_ie_len; 1003 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 1004 next += info->req_ie_len; 1005 } 1006 if (info->resp_ie_len) { 1007 ev->rm.resp_ie = next; 1008 ev->rm.resp_ie_len = info->resp_ie_len; 1009 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1010 info->resp_ie_len); 1011 next += info->resp_ie_len; 1012 } 1013 if (info->fils.kek_len) { 1014 ev->rm.fils.kek = next; 1015 ev->rm.fils.kek_len = info->fils.kek_len; 1016 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1017 info->fils.kek_len); 1018 next += info->fils.kek_len; 1019 } 1020 if (info->fils.pmk_len) { 1021 ev->rm.fils.pmk = next; 1022 ev->rm.fils.pmk_len = info->fils.pmk_len; 1023 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1024 info->fils.pmk_len); 1025 next += info->fils.pmk_len; 1026 } 1027 if (info->fils.pmkid) { 1028 ev->rm.fils.pmkid = next; 1029 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1030 WLAN_PMKID_LEN); 1031 next += WLAN_PMKID_LEN; 1032 } 1033 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1034 if (info->fils.update_erp_next_seq_num) 1035 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1036 ev->rm.bss = info->bss; 1037 1038 spin_lock_irqsave(&wdev->event_lock, flags); 1039 list_add_tail(&ev->list, &wdev->event_list); 1040 spin_unlock_irqrestore(&wdev->event_lock, flags); 1041 queue_work(cfg80211_wq, &rdev->event_work); 1042} 1043EXPORT_SYMBOL(cfg80211_roamed); 1044 1045void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid) 1046{ 1047 ASSERT_WDEV_LOCK(wdev); 1048 1049 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION)) 1050 return; 1051 1052 if (WARN_ON(!wdev->current_bss) || 1053 WARN_ON(!ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) 1054 return; 1055 1056 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1057 bssid); 1058} 1059 1060void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1061 gfp_t gfp) 1062{ 1063 struct wireless_dev *wdev = dev->ieee80211_ptr; 1064 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1065 struct cfg80211_event *ev; 1066 unsigned long flags; 1067 1068 if (WARN_ON(!bssid)) 1069 return; 1070 1071 ev = kzalloc(sizeof(*ev), gfp); 1072 if (!ev) 1073 return; 1074 1075 ev->type = EVENT_PORT_AUTHORIZED; 1076 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1077 1078 /* 1079 * Use the wdev event list so that if there are pending 1080 * connected/roamed events, they will be reported first. 1081 */ 1082 spin_lock_irqsave(&wdev->event_lock, flags); 1083 list_add_tail(&ev->list, &wdev->event_list); 1084 spin_unlock_irqrestore(&wdev->event_lock, flags); 1085 queue_work(cfg80211_wq, &rdev->event_work); 1086} 1087EXPORT_SYMBOL(cfg80211_port_authorized); 1088 1089void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1090 size_t ie_len, u16 reason, bool from_ap) 1091{ 1092 struct wireless_dev *wdev = dev->ieee80211_ptr; 1093 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1094 int i; 1095#ifdef CONFIG_CFG80211_WEXT 1096 union iwreq_data wrqu; 1097#endif 1098 1099 ASSERT_WDEV_LOCK(wdev); 1100 1101 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1102 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1103 return; 1104 1105 if (wdev->current_bss) { 1106 cfg80211_unhold_bss(wdev->current_bss); 1107 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 1108 } 1109 1110 wdev->current_bss = NULL; 1111 wdev->ssid_len = 0; 1112 wdev->conn_owner_nlportid = 0; 1113 kfree_sensitive(wdev->connect_keys); 1114 wdev->connect_keys = NULL; 1115 1116 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1117 1118 /* stop critical protocol if supported */ 1119 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1120 rdev->crit_proto_nlportid = 0; 1121 rdev_crit_proto_stop(rdev, wdev); 1122 } 1123 1124 /* 1125 * Delete all the keys ... pairwise keys can't really 1126 * exist any more anyway, but default keys might. 1127 */ 1128 if (rdev->ops->del_key) { 1129 int max_key_idx = 5; 1130 1131 if (wiphy_ext_feature_isset( 1132 wdev->wiphy, 1133 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1134 wiphy_ext_feature_isset( 1135 wdev->wiphy, 1136 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1137 max_key_idx = 7; 1138 for (i = 0; i <= max_key_idx; i++) 1139 rdev_del_key(rdev, dev, i, false, NULL); 1140 } 1141 1142 rdev_set_qos_map(rdev, dev, NULL); 1143 1144#ifdef CONFIG_CFG80211_WEXT 1145 memset(&wrqu, 0, sizeof(wrqu)); 1146 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1147 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1148 wdev->wext.connect.ssid_len = 0; 1149#endif 1150 1151 schedule_work(&cfg80211_disconnect_work); 1152} 1153 1154void cfg80211_disconnected(struct net_device *dev, u16 reason, 1155 const u8 *ie, size_t ie_len, 1156 bool locally_generated, gfp_t gfp) 1157{ 1158 struct wireless_dev *wdev = dev->ieee80211_ptr; 1159 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1160 struct cfg80211_event *ev; 1161 unsigned long flags; 1162 1163 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1164 if (!ev) 1165 return; 1166 1167 ev->type = EVENT_DISCONNECTED; 1168 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1169 ev->dc.ie_len = ie_len; 1170 memcpy((void *)ev->dc.ie, ie, ie_len); 1171 ev->dc.reason = reason; 1172 ev->dc.locally_generated = locally_generated; 1173 1174 spin_lock_irqsave(&wdev->event_lock, flags); 1175 list_add_tail(&ev->list, &wdev->event_list); 1176 spin_unlock_irqrestore(&wdev->event_lock, flags); 1177 queue_work(cfg80211_wq, &rdev->event_work); 1178} 1179EXPORT_SYMBOL(cfg80211_disconnected); 1180 1181/* 1182 * API calls for nl80211/wext compatibility code 1183 */ 1184int cfg80211_connect(struct cfg80211_registered_device *rdev, 1185 struct net_device *dev, 1186 struct cfg80211_connect_params *connect, 1187 struct cfg80211_cached_keys *connkeys, 1188 const u8 *prev_bssid) 1189{ 1190 struct wireless_dev *wdev = dev->ieee80211_ptr; 1191 int err; 1192 1193 ASSERT_WDEV_LOCK(wdev); 1194 1195 /* 1196 * If we have an ssid_len, we're trying to connect or are 1197 * already connected, so reject a new SSID unless it's the 1198 * same (which is the case for re-association.) 1199 */ 1200 if (wdev->ssid_len && 1201 (wdev->ssid_len != connect->ssid_len || 1202 memcmp(wdev->ssid, connect->ssid, wdev->ssid_len))) 1203 return -EALREADY; 1204 1205 /* 1206 * If connected, reject (re-)association unless prev_bssid 1207 * matches the current BSSID. 1208 */ 1209 if (wdev->current_bss) { 1210 if (!prev_bssid) 1211 return -EALREADY; 1212 if (!ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid)) 1213 return -ENOTCONN; 1214 } 1215 1216 /* 1217 * Reject if we're in the process of connecting with WEP, 1218 * this case isn't very interesting and trying to handle 1219 * it would make the code much more complex. 1220 */ 1221 if (wdev->connect_keys) 1222 return -EINPROGRESS; 1223 1224 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1225 rdev->wiphy.ht_capa_mod_mask); 1226 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1227 rdev->wiphy.vht_capa_mod_mask); 1228 1229 if (connkeys && connkeys->def >= 0) { 1230 int idx; 1231 u32 cipher; 1232 1233 idx = connkeys->def; 1234 cipher = connkeys->params[idx].cipher; 1235 /* If given a WEP key we may need it for shared key auth */ 1236 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1237 cipher == WLAN_CIPHER_SUITE_WEP104) { 1238 connect->key_idx = idx; 1239 connect->key = connkeys->params[idx].key; 1240 connect->key_len = connkeys->params[idx].key_len; 1241 1242 /* 1243 * If ciphers are not set (e.g. when going through 1244 * iwconfig), we have to set them appropriately here. 1245 */ 1246 if (connect->crypto.cipher_group == 0) 1247 connect->crypto.cipher_group = cipher; 1248 1249 if (connect->crypto.n_ciphers_pairwise == 0) { 1250 connect->crypto.n_ciphers_pairwise = 1; 1251 connect->crypto.ciphers_pairwise[0] = cipher; 1252 } 1253 } 1254 1255 connect->crypto.wep_keys = connkeys->params; 1256 connect->crypto.wep_tx_key = connkeys->def; 1257 } else { 1258 if (WARN_ON(connkeys)) 1259 return -EINVAL; 1260 1261 /* connect can point to wdev->wext.connect which 1262 * can hold key data from a previous connection 1263 */ 1264 connect->key = NULL; 1265 connect->key_len = 0; 1266 connect->key_idx = 0; 1267 } 1268 1269 wdev->connect_keys = connkeys; 1270 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 1271 wdev->ssid_len = connect->ssid_len; 1272 1273 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1274 IEEE80211_BSS_TYPE_ESS; 1275 1276 if (!rdev->ops->connect) 1277 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1278 else 1279 err = rdev_connect(rdev, dev, connect); 1280 1281 if (err) { 1282 wdev->connect_keys = NULL; 1283 /* 1284 * This could be reassoc getting refused, don't clear 1285 * ssid_len in that case. 1286 */ 1287 if (!wdev->current_bss) 1288 wdev->ssid_len = 0; 1289 return err; 1290 } 1291 1292 return 0; 1293} 1294 1295int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1296 struct net_device *dev, u16 reason, bool wextev) 1297{ 1298 struct wireless_dev *wdev = dev->ieee80211_ptr; 1299 int err = 0; 1300 1301 ASSERT_WDEV_LOCK(wdev); 1302 1303 kfree_sensitive(wdev->connect_keys); 1304 wdev->connect_keys = NULL; 1305 1306 wdev->conn_owner_nlportid = 0; 1307 1308 if (wdev->conn) 1309 err = cfg80211_sme_disconnect(wdev, reason); 1310 else if (!rdev->ops->disconnect) 1311 cfg80211_mlme_down(rdev, dev); 1312 else if (wdev->ssid_len) 1313 err = rdev_disconnect(rdev, dev, reason); 1314 1315 /* 1316 * Clear ssid_len unless we actually were fully connected, 1317 * in which case cfg80211_disconnected() will take care of 1318 * this later. 1319 */ 1320 if (!wdev->current_bss) 1321 wdev->ssid_len = 0; 1322 1323 return err; 1324} 1325 1326/* 1327 * Used to clean up after the connection / connection attempt owner socket 1328 * disconnects 1329 */ 1330void cfg80211_autodisconnect_wk(struct work_struct *work) 1331{ 1332 struct wireless_dev *wdev = 1333 container_of(work, struct wireless_dev, disconnect_wk); 1334 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1335 1336 wdev_lock(wdev); 1337 1338 if (wdev->conn_owner_nlportid) { 1339 switch (wdev->iftype) { 1340 case NL80211_IFTYPE_ADHOC: 1341 __cfg80211_leave_ibss(rdev, wdev->netdev, false); 1342 break; 1343 case NL80211_IFTYPE_AP: 1344 case NL80211_IFTYPE_P2P_GO: 1345 __cfg80211_stop_ap(rdev, wdev->netdev, false); 1346 break; 1347 case NL80211_IFTYPE_MESH_POINT: 1348 __cfg80211_leave_mesh(rdev, wdev->netdev); 1349 break; 1350 case NL80211_IFTYPE_STATION: 1351 case NL80211_IFTYPE_P2P_CLIENT: 1352 /* 1353 * Use disconnect_bssid if still connecting and 1354 * ops->disconnect not implemented. Otherwise we can 1355 * use cfg80211_disconnect. 1356 */ 1357 if (rdev->ops->disconnect || wdev->current_bss) 1358 cfg80211_disconnect(rdev, wdev->netdev, 1359 WLAN_REASON_DEAUTH_LEAVING, 1360 true); 1361 else 1362 cfg80211_mlme_deauth(rdev, wdev->netdev, 1363 wdev->disconnect_bssid, 1364 NULL, 0, 1365 WLAN_REASON_DEAUTH_LEAVING, 1366 false); 1367 break; 1368 default: 1369 break; 1370 } 1371 } 1372 1373 wdev_unlock(wdev); 1374} 1375