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_auth_request auth_req = {}; 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 auth_req.key = params->key; 172 auth_req.key_len = params->key_len; 173 auth_req.key_idx = params->key_idx; 174 auth_req.auth_type = params->auth_type; 175 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, 176 params->bssid, 177 params->ssid, params->ssid_len, 178 IEEE80211_BSS_TYPE_ESS, 179 IEEE80211_PRIVACY_ANY); 180 auth_req.link_id = -1; 181 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req); 182 cfg80211_put_bss(&rdev->wiphy, auth_req.bss); 183 return err; 184 case CFG80211_CONN_AUTH_FAILED_TIMEOUT: 185 *treason = NL80211_TIMEOUT_AUTH; 186 return -ENOTCONN; 187 case CFG80211_CONN_ASSOCIATE_NEXT: 188 if (WARN_ON(!rdev->ops->assoc)) 189 return -EOPNOTSUPP; 190 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 191 if (wdev->conn->prev_bssid_valid) 192 req.prev_bssid = wdev->conn->prev_bssid; 193 req.ie = params->ie; 194 req.ie_len = params->ie_len; 195 req.use_mfp = params->mfp != NL80211_MFP_NO; 196 req.crypto = params->crypto; 197 req.flags = params->flags; 198 req.ht_capa = params->ht_capa; 199 req.ht_capa_mask = params->ht_capa_mask; 200 req.vht_capa = params->vht_capa; 201 req.vht_capa_mask = params->vht_capa_mask; 202 req.link_id = -1; 203 204 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, 205 params->bssid, 206 params->ssid, params->ssid_len, 207 IEEE80211_BSS_TYPE_ESS, 208 IEEE80211_PRIVACY_ANY); 209 if (!req.bss) { 210 err = -ENOENT; 211 } else { 212 err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req); 213 cfg80211_put_bss(&rdev->wiphy, req.bss); 214 } 215 216 if (err) 217 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 218 NULL, 0, 219 WLAN_REASON_DEAUTH_LEAVING, 220 false); 221 return err; 222 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT: 223 *treason = NL80211_TIMEOUT_ASSOC; 224 fallthrough; 225 case CFG80211_CONN_ASSOC_FAILED: 226 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 227 NULL, 0, 228 WLAN_REASON_DEAUTH_LEAVING, false); 229 return -ENOTCONN; 230 case CFG80211_CONN_DEAUTH: 231 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 232 NULL, 0, 233 WLAN_REASON_DEAUTH_LEAVING, false); 234 fallthrough; 235 case CFG80211_CONN_ABANDON: 236 /* free directly, disconnected event already sent */ 237 cfg80211_sme_free(wdev); 238 return 0; 239 default: 240 return 0; 241 } 242 } 243 244 void cfg80211_conn_work(struct work_struct *work) 245 { 246 struct cfg80211_registered_device *rdev = 247 container_of(work, struct cfg80211_registered_device, conn_work); 248 struct wireless_dev *wdev; 249 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 250 enum nl80211_timeout_reason treason; 251 252 wiphy_lock(&rdev->wiphy); 253 254 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 255 if (!wdev->netdev) 256 continue; 257 258 wdev_lock(wdev); 259 if (!netif_running(wdev->netdev)) { 260 wdev_unlock(wdev); 261 continue; 262 } 263 if (!wdev->conn || 264 wdev->conn->state == CFG80211_CONN_CONNECTED) { 265 wdev_unlock(wdev); 266 continue; 267 } 268 if (wdev->conn->params.bssid) { 269 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 270 bssid = bssid_buf; 271 } 272 treason = NL80211_TIMEOUT_UNSPECIFIED; 273 if (cfg80211_conn_do_work(wdev, &treason)) { 274 struct cfg80211_connect_resp_params cr; 275 276 memset(&cr, 0, sizeof(cr)); 277 cr.status = -1; 278 cr.links[0].bssid = bssid; 279 cr.timeout_reason = treason; 280 __cfg80211_connect_result(wdev->netdev, &cr, false); 281 } 282 wdev_unlock(wdev); 283 } 284 285 wiphy_unlock(&rdev->wiphy); 286 } 287 288 /* Returned bss is reference counted and must be cleaned up appropriately. */ 289 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 290 { 291 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 292 struct cfg80211_bss *bss; 293 294 ASSERT_WDEV_LOCK(wdev); 295 296 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 297 wdev->conn->params.bssid, 298 wdev->conn->params.ssid, 299 wdev->conn->params.ssid_len, 300 wdev->conn_bss_type, 301 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 302 if (!bss) 303 return NULL; 304 305 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 306 wdev->conn->params.bssid = wdev->conn->bssid; 307 wdev->conn->params.channel = bss->channel; 308 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 309 schedule_work(&rdev->conn_work); 310 311 return bss; 312 } 313 314 static void __cfg80211_sme_scan_done(struct net_device *dev) 315 { 316 struct wireless_dev *wdev = dev->ieee80211_ptr; 317 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 318 struct cfg80211_bss *bss; 319 320 ASSERT_WDEV_LOCK(wdev); 321 322 if (!wdev->conn) 323 return; 324 325 if (wdev->conn->state != CFG80211_CONN_SCANNING && 326 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 327 return; 328 329 bss = cfg80211_get_conn_bss(wdev); 330 if (bss) 331 cfg80211_put_bss(&rdev->wiphy, bss); 332 else 333 schedule_work(&rdev->conn_work); 334 } 335 336 void cfg80211_sme_scan_done(struct net_device *dev) 337 { 338 struct wireless_dev *wdev = dev->ieee80211_ptr; 339 340 wdev_lock(wdev); 341 __cfg80211_sme_scan_done(dev); 342 wdev_unlock(wdev); 343 } 344 345 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 346 { 347 struct wiphy *wiphy = wdev->wiphy; 348 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 349 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 350 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 351 352 ASSERT_WDEV_LOCK(wdev); 353 354 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 355 return; 356 357 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 358 wdev->conn->auto_auth && 359 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 360 /* select automatically between only open, shared, leap */ 361 switch (wdev->conn->params.auth_type) { 362 case NL80211_AUTHTYPE_OPEN_SYSTEM: 363 if (wdev->connect_keys) 364 wdev->conn->params.auth_type = 365 NL80211_AUTHTYPE_SHARED_KEY; 366 else 367 wdev->conn->params.auth_type = 368 NL80211_AUTHTYPE_NETWORK_EAP; 369 break; 370 case NL80211_AUTHTYPE_SHARED_KEY: 371 wdev->conn->params.auth_type = 372 NL80211_AUTHTYPE_NETWORK_EAP; 373 break; 374 default: 375 /* huh? */ 376 wdev->conn->params.auth_type = 377 NL80211_AUTHTYPE_OPEN_SYSTEM; 378 break; 379 } 380 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 381 schedule_work(&rdev->conn_work); 382 } else if (status_code != WLAN_STATUS_SUCCESS) { 383 struct cfg80211_connect_resp_params cr; 384 385 memset(&cr, 0, sizeof(cr)); 386 cr.status = status_code; 387 cr.links[0].bssid = mgmt->bssid; 388 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 389 __cfg80211_connect_result(wdev->netdev, &cr, false); 390 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 391 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 392 schedule_work(&rdev->conn_work); 393 } 394 } 395 396 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 397 { 398 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 399 400 if (!wdev->conn) 401 return false; 402 403 if (status == WLAN_STATUS_SUCCESS) { 404 wdev->conn->state = CFG80211_CONN_CONNECTED; 405 return false; 406 } 407 408 if (wdev->conn->prev_bssid_valid) { 409 /* 410 * Some stupid APs don't accept reassoc, so we 411 * need to fall back to trying regular assoc; 412 * return true so no event is sent to userspace. 413 */ 414 wdev->conn->prev_bssid_valid = false; 415 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 416 schedule_work(&rdev->conn_work); 417 return true; 418 } 419 420 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 421 schedule_work(&rdev->conn_work); 422 return false; 423 } 424 425 void cfg80211_sme_deauth(struct wireless_dev *wdev) 426 { 427 cfg80211_sme_free(wdev); 428 } 429 430 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 431 { 432 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 433 434 if (!wdev->conn) 435 return; 436 437 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 438 schedule_work(&rdev->conn_work); 439 } 440 441 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 442 { 443 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 444 445 if (!wdev->conn) 446 return; 447 448 wdev->conn->state = CFG80211_CONN_DEAUTH; 449 schedule_work(&rdev->conn_work); 450 } 451 452 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 453 { 454 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 455 456 if (!wdev->conn) 457 return; 458 459 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; 460 schedule_work(&rdev->conn_work); 461 } 462 463 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) 464 { 465 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 466 467 if (!wdev->conn) 468 return; 469 470 wdev->conn->state = CFG80211_CONN_ABANDON; 471 schedule_work(&rdev->conn_work); 472 } 473 474 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev) 475 { 476 unsigned int link; 477 478 for_each_valid_link(wdev, link) { 479 if (!wdev->links[link].client.current_bss) 480 continue; 481 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 482 cfg80211_put_bss(wdev->wiphy, 483 &wdev->links[link].client.current_bss->pub); 484 wdev->links[link].client.current_bss = NULL; 485 } 486 } 487 488 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 489 const u8 *ies, size_t ies_len, 490 const u8 **out_ies, size_t *out_ies_len) 491 { 492 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 493 u8 *buf; 494 size_t offs; 495 496 if (!rdev->wiphy.extended_capabilities_len || 497 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 498 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 499 if (!*out_ies) 500 return -ENOMEM; 501 *out_ies_len = ies_len; 502 return 0; 503 } 504 505 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 506 GFP_KERNEL); 507 if (!buf) 508 return -ENOMEM; 509 510 if (ies_len) { 511 static const u8 before_extcapa[] = { 512 /* not listing IEs expected to be created by driver */ 513 WLAN_EID_RSN, 514 WLAN_EID_QOS_CAPA, 515 WLAN_EID_RRM_ENABLED_CAPABILITIES, 516 WLAN_EID_MOBILITY_DOMAIN, 517 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 518 WLAN_EID_BSS_COEX_2040, 519 }; 520 521 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 522 ARRAY_SIZE(before_extcapa), 0); 523 memcpy(buf, ies, offs); 524 /* leave a whole for extended capabilities IE */ 525 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 526 ies + offs, ies_len - offs); 527 } else { 528 offs = 0; 529 } 530 531 /* place extended capabilities IE (with only driver capabilities) */ 532 buf[offs] = WLAN_EID_EXT_CAPABILITY; 533 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 534 memcpy(buf + offs + 2, 535 rdev->wiphy.extended_capabilities, 536 rdev->wiphy.extended_capabilities_len); 537 538 *out_ies = buf; 539 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 540 541 return 0; 542 } 543 544 static int cfg80211_sme_connect(struct wireless_dev *wdev, 545 struct cfg80211_connect_params *connect, 546 const u8 *prev_bssid) 547 { 548 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 549 struct cfg80211_bss *bss; 550 int err; 551 552 if (!rdev->ops->auth || !rdev->ops->assoc) 553 return -EOPNOTSUPP; 554 555 cfg80211_wdev_release_bsses(wdev); 556 557 if (wdev->connected) { 558 cfg80211_sme_free(wdev); 559 wdev->connected = false; 560 } 561 562 if (wdev->conn) 563 return -EINPROGRESS; 564 565 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 566 if (!wdev->conn) 567 return -ENOMEM; 568 569 /* 570 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 571 */ 572 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 573 if (connect->bssid) { 574 wdev->conn->params.bssid = wdev->conn->bssid; 575 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 576 } 577 578 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 579 &wdev->conn->ie, 580 &wdev->conn->params.ie_len)) { 581 kfree(wdev->conn); 582 wdev->conn = NULL; 583 return -ENOMEM; 584 } 585 wdev->conn->params.ie = wdev->conn->ie; 586 587 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 588 wdev->conn->auto_auth = true; 589 /* start with open system ... should mostly work */ 590 wdev->conn->params.auth_type = 591 NL80211_AUTHTYPE_OPEN_SYSTEM; 592 } else { 593 wdev->conn->auto_auth = false; 594 } 595 596 wdev->conn->params.ssid = wdev->u.client.ssid; 597 wdev->conn->params.ssid_len = wdev->u.client.ssid_len; 598 599 /* see if we have the bss already */ 600 bss = cfg80211_get_conn_bss(wdev); 601 602 if (prev_bssid) { 603 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 604 wdev->conn->prev_bssid_valid = true; 605 } 606 607 /* we're good if we have a matching bss struct */ 608 if (bss) { 609 enum nl80211_timeout_reason treason; 610 611 err = cfg80211_conn_do_work(wdev, &treason); 612 cfg80211_put_bss(wdev->wiphy, bss); 613 } else { 614 /* otherwise we'll need to scan for the AP first */ 615 err = cfg80211_conn_scan(wdev); 616 617 /* 618 * If we can't scan right now, then we need to scan again 619 * after the current scan finished, since the parameters 620 * changed (unless we find a good AP anyway). 621 */ 622 if (err == -EBUSY) { 623 err = 0; 624 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 625 } 626 } 627 628 if (err) 629 cfg80211_sme_free(wdev); 630 631 return err; 632 } 633 634 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 635 { 636 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 637 int err; 638 639 if (!wdev->conn) 640 return 0; 641 642 if (!rdev->ops->deauth) 643 return -EOPNOTSUPP; 644 645 if (wdev->conn->state == CFG80211_CONN_SCANNING || 646 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 647 err = 0; 648 goto out; 649 } 650 651 /* wdev->conn->params.bssid must be set if > SCANNING */ 652 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 653 wdev->conn->params.bssid, 654 NULL, 0, reason, false); 655 out: 656 cfg80211_sme_free(wdev); 657 return err; 658 } 659 660 /* 661 * code shared for in-device and software SME 662 */ 663 664 static bool cfg80211_is_all_idle(void) 665 { 666 struct cfg80211_registered_device *rdev; 667 struct wireless_dev *wdev; 668 bool is_all_idle = true; 669 670 /* 671 * All devices must be idle as otherwise if you are actively 672 * scanning some new beacon hints could be learned and would 673 * count as new regulatory hints. 674 * Also if there is any other active beaconing interface we 675 * need not issue a disconnect hint and reset any info such 676 * as chan dfs state, etc. 677 */ 678 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 679 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 680 wdev_lock(wdev); 681 if (wdev->conn || wdev->connected || 682 cfg80211_beaconing_iface_active(wdev)) 683 is_all_idle = false; 684 wdev_unlock(wdev); 685 } 686 } 687 688 return is_all_idle; 689 } 690 691 static void disconnect_work(struct work_struct *work) 692 { 693 rtnl_lock(); 694 if (cfg80211_is_all_idle()) 695 regulatory_hint_disconnect(); 696 rtnl_unlock(); 697 } 698 699 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 700 701 static void 702 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev, 703 struct cfg80211_connect_resp_params *cr) 704 { 705 unsigned int link; 706 707 for_each_valid_link(cr, link) { 708 if (!cr->links[link].bss) 709 continue; 710 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 711 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 712 } 713 } 714 715 /* 716 * API calls for drivers implementing connect/disconnect and 717 * SME event handling 718 */ 719 720 /* This method must consume bss one way or another */ 721 void __cfg80211_connect_result(struct net_device *dev, 722 struct cfg80211_connect_resp_params *cr, 723 bool wextev) 724 { 725 struct wireless_dev *wdev = dev->ieee80211_ptr; 726 const struct element *country_elem = NULL; 727 const u8 *country_data; 728 u8 country_datalen; 729 #ifdef CONFIG_CFG80211_WEXT 730 union iwreq_data wrqu; 731 #endif 732 unsigned int link; 733 const u8 *connected_addr; 734 bool bss_not_found = false; 735 736 ASSERT_WDEV_LOCK(wdev); 737 738 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 739 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 740 goto out; 741 742 if (cr->valid_links) { 743 if (WARN_ON(!cr->ap_mld_addr)) 744 goto out; 745 746 for_each_valid_link(cr, link) { 747 if (WARN_ON(!cr->links[link].addr)) 748 goto out; 749 } 750 751 if (WARN_ON(wdev->connect_keys)) 752 goto out; 753 } 754 755 wdev->unprot_beacon_reported = 0; 756 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 757 GFP_KERNEL); 758 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid; 759 760 #ifdef CONFIG_CFG80211_WEXT 761 if (wextev && !cr->valid_links) { 762 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 763 memset(&wrqu, 0, sizeof(wrqu)); 764 wrqu.data.length = cr->req_ie_len; 765 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 766 cr->req_ie); 767 } 768 769 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 770 memset(&wrqu, 0, sizeof(wrqu)); 771 wrqu.data.length = cr->resp_ie_len; 772 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 773 cr->resp_ie); 774 } 775 776 memset(&wrqu, 0, sizeof(wrqu)); 777 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 778 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) { 779 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 780 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 781 wdev->wext.prev_bssid_valid = true; 782 } 783 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 784 } 785 #endif 786 787 if (cr->status == WLAN_STATUS_SUCCESS) { 788 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) { 789 for_each_valid_link(cr, link) { 790 if (WARN_ON_ONCE(!cr->links[link].bss)) 791 break; 792 } 793 } 794 795 for_each_valid_link(cr, link) { 796 if (cr->links[link].bss) 797 continue; 798 799 cr->links[link].bss = 800 cfg80211_get_bss(wdev->wiphy, NULL, 801 cr->links[link].bssid, 802 wdev->u.client.ssid, 803 wdev->u.client.ssid_len, 804 wdev->conn_bss_type, 805 IEEE80211_PRIVACY_ANY); 806 if (!cr->links[link].bss) { 807 bss_not_found = true; 808 break; 809 } 810 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss)); 811 } 812 } 813 814 cfg80211_wdev_release_bsses(wdev); 815 816 if (cr->status != WLAN_STATUS_SUCCESS) { 817 kfree_sensitive(wdev->connect_keys); 818 wdev->connect_keys = NULL; 819 wdev->u.client.ssid_len = 0; 820 wdev->conn_owner_nlportid = 0; 821 cfg80211_connect_result_release_bsses(wdev, cr); 822 cfg80211_sme_free(wdev); 823 return; 824 } 825 826 if (WARN_ON(bss_not_found)) { 827 cfg80211_connect_result_release_bsses(wdev, cr); 828 return; 829 } 830 831 memset(wdev->links, 0, sizeof(wdev->links)); 832 wdev->valid_links = cr->valid_links; 833 for_each_valid_link(cr, link) 834 wdev->links[link].client.current_bss = 835 bss_from_pub(cr->links[link].bss); 836 wdev->connected = true; 837 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 838 if (cr->valid_links) { 839 for_each_valid_link(cr, link) 840 memcpy(wdev->links[link].addr, cr->links[link].addr, 841 ETH_ALEN); 842 } 843 844 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP)) 845 cfg80211_upload_connect_keys(wdev); 846 847 rcu_read_lock(); 848 for_each_valid_link(cr, link) { 849 country_elem = 850 ieee80211_bss_get_elem(cr->links[link].bss, 851 WLAN_EID_COUNTRY); 852 if (country_elem) 853 break; 854 } 855 if (!country_elem) { 856 rcu_read_unlock(); 857 return; 858 } 859 860 country_datalen = country_elem->datalen; 861 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 862 rcu_read_unlock(); 863 864 if (!country_data) 865 return; 866 867 regulatory_hint_country_ie(wdev->wiphy, 868 cr->links[link].bss->channel->band, 869 country_data, country_datalen); 870 kfree(country_data); 871 872 return; 873 out: 874 for_each_valid_link(cr, link) 875 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 876 } 877 878 static void cfg80211_update_link_bss(struct wireless_dev *wdev, 879 struct cfg80211_bss **bss) 880 { 881 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 882 struct cfg80211_internal_bss *ibss; 883 884 if (!*bss) 885 return; 886 887 ibss = bss_from_pub(*bss); 888 if (list_empty(&ibss->list)) { 889 struct cfg80211_bss *found = NULL, *tmp = *bss; 890 891 found = cfg80211_get_bss(wdev->wiphy, NULL, 892 (*bss)->bssid, 893 wdev->u.client.ssid, 894 wdev->u.client.ssid_len, 895 wdev->conn_bss_type, 896 IEEE80211_PRIVACY_ANY); 897 if (found) { 898 /* The same BSS is already updated so use it 899 * instead, as it has latest info. 900 */ 901 *bss = found; 902 } else { 903 /* Update with BSS provided by driver, it will 904 * be freshly added and ref cnted, we can free 905 * the old one. 906 * 907 * signal_valid can be false, as we are not 908 * expecting the BSS to be found. 909 * 910 * keep the old timestamp to avoid confusion 911 */ 912 cfg80211_bss_update(rdev, ibss, false, 913 ibss->ts); 914 } 915 916 cfg80211_put_bss(wdev->wiphy, tmp); 917 } 918 } 919 920 /* Consumes bss object(s) one way or another */ 921 void cfg80211_connect_done(struct net_device *dev, 922 struct cfg80211_connect_resp_params *params, 923 gfp_t gfp) 924 { 925 struct wireless_dev *wdev = dev->ieee80211_ptr; 926 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 927 struct cfg80211_event *ev; 928 unsigned long flags; 929 u8 *next; 930 size_t link_info_size = 0; 931 unsigned int link; 932 933 for_each_valid_link(params, link) { 934 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss); 935 link_info_size += params->links[link].bssid ? ETH_ALEN : 0; 936 link_info_size += params->links[link].addr ? ETH_ALEN : 0; 937 } 938 939 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) + 940 params->req_ie_len + params->resp_ie_len + 941 params->fils.kek_len + params->fils.pmk_len + 942 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size, 943 gfp); 944 945 if (!ev) { 946 for_each_valid_link(params, link) 947 cfg80211_put_bss(wdev->wiphy, 948 params->links[link].bss); 949 return; 950 } 951 952 ev->type = EVENT_CONNECT_RESULT; 953 next = ((u8 *)ev) + sizeof(*ev); 954 if (params->ap_mld_addr) { 955 ev->cr.ap_mld_addr = next; 956 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr, 957 ETH_ALEN); 958 next += ETH_ALEN; 959 } 960 if (params->req_ie_len) { 961 ev->cr.req_ie = next; 962 ev->cr.req_ie_len = params->req_ie_len; 963 memcpy((void *)ev->cr.req_ie, params->req_ie, 964 params->req_ie_len); 965 next += params->req_ie_len; 966 } 967 if (params->resp_ie_len) { 968 ev->cr.resp_ie = next; 969 ev->cr.resp_ie_len = params->resp_ie_len; 970 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 971 params->resp_ie_len); 972 next += params->resp_ie_len; 973 } 974 if (params->fils.kek_len) { 975 ev->cr.fils.kek = next; 976 ev->cr.fils.kek_len = params->fils.kek_len; 977 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 978 params->fils.kek_len); 979 next += params->fils.kek_len; 980 } 981 if (params->fils.pmk_len) { 982 ev->cr.fils.pmk = next; 983 ev->cr.fils.pmk_len = params->fils.pmk_len; 984 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 985 params->fils.pmk_len); 986 next += params->fils.pmk_len; 987 } 988 if (params->fils.pmkid) { 989 ev->cr.fils.pmkid = next; 990 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 991 WLAN_PMKID_LEN); 992 next += WLAN_PMKID_LEN; 993 } 994 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 995 if (params->fils.update_erp_next_seq_num) 996 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 997 ev->cr.valid_links = params->valid_links; 998 for_each_valid_link(params, link) { 999 if (params->links[link].bss) 1000 cfg80211_hold_bss( 1001 bss_from_pub(params->links[link].bss)); 1002 ev->cr.links[link].bss = params->links[link].bss; 1003 1004 if (params->links[link].addr) { 1005 ev->cr.links[link].addr = next; 1006 memcpy((void *)ev->cr.links[link].addr, 1007 params->links[link].addr, 1008 ETH_ALEN); 1009 next += ETH_ALEN; 1010 } 1011 if (params->links[link].bssid) { 1012 ev->cr.links[link].bssid = next; 1013 memcpy((void *)ev->cr.links[link].bssid, 1014 params->links[link].bssid, 1015 ETH_ALEN); 1016 next += ETH_ALEN; 1017 } 1018 } 1019 ev->cr.status = params->status; 1020 ev->cr.timeout_reason = params->timeout_reason; 1021 1022 spin_lock_irqsave(&wdev->event_lock, flags); 1023 list_add_tail(&ev->list, &wdev->event_list); 1024 spin_unlock_irqrestore(&wdev->event_lock, flags); 1025 queue_work(cfg80211_wq, &rdev->event_work); 1026 } 1027 EXPORT_SYMBOL(cfg80211_connect_done); 1028 1029 /* Consumes bss object one way or another */ 1030 void __cfg80211_roamed(struct wireless_dev *wdev, 1031 struct cfg80211_roam_info *info) 1032 { 1033 #ifdef CONFIG_CFG80211_WEXT 1034 union iwreq_data wrqu; 1035 #endif 1036 unsigned int link; 1037 const u8 *connected_addr; 1038 1039 ASSERT_WDEV_LOCK(wdev); 1040 1041 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1042 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1043 goto out; 1044 1045 if (WARN_ON(!wdev->connected)) 1046 goto out; 1047 1048 if (info->valid_links) { 1049 if (WARN_ON(!info->ap_mld_addr)) 1050 goto out; 1051 1052 for_each_valid_link(info, link) { 1053 if (WARN_ON(!info->links[link].addr)) 1054 goto out; 1055 } 1056 } 1057 1058 cfg80211_wdev_release_bsses(wdev); 1059 1060 for_each_valid_link(info, link) { 1061 if (WARN_ON(!info->links[link].bss)) 1062 goto out; 1063 } 1064 1065 memset(wdev->links, 0, sizeof(wdev->links)); 1066 wdev->valid_links = info->valid_links; 1067 for_each_valid_link(info, link) { 1068 cfg80211_hold_bss(bss_from_pub(info->links[link].bss)); 1069 wdev->links[link].client.current_bss = 1070 bss_from_pub(info->links[link].bss); 1071 } 1072 1073 connected_addr = info->valid_links ? 1074 info->ap_mld_addr : 1075 info->links[0].bss->bssid; 1076 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 1077 if (info->valid_links) { 1078 for_each_valid_link(info, link) 1079 memcpy(wdev->links[link].addr, info->links[link].addr, 1080 ETH_ALEN); 1081 } 1082 wdev->unprot_beacon_reported = 0; 1083 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 1084 wdev->netdev, info, GFP_KERNEL); 1085 1086 #ifdef CONFIG_CFG80211_WEXT 1087 if (!info->valid_links) { 1088 if (info->req_ie) { 1089 memset(&wrqu, 0, sizeof(wrqu)); 1090 wrqu.data.length = info->req_ie_len; 1091 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 1092 &wrqu, info->req_ie); 1093 } 1094 1095 if (info->resp_ie) { 1096 memset(&wrqu, 0, sizeof(wrqu)); 1097 wrqu.data.length = info->resp_ie_len; 1098 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 1099 &wrqu, info->resp_ie); 1100 } 1101 1102 memset(&wrqu, 0, sizeof(wrqu)); 1103 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1104 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 1105 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 1106 wdev->wext.prev_bssid_valid = true; 1107 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 1108 } 1109 #endif 1110 1111 return; 1112 out: 1113 for_each_valid_link(info, link) 1114 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1115 } 1116 1117 /* Consumes info->links.bss object(s) one way or another */ 1118 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 1119 gfp_t gfp) 1120 { 1121 struct wireless_dev *wdev = dev->ieee80211_ptr; 1122 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1123 struct cfg80211_event *ev; 1124 unsigned long flags; 1125 u8 *next; 1126 unsigned int link; 1127 size_t link_info_size = 0; 1128 bool bss_not_found = false; 1129 1130 for_each_valid_link(info, link) { 1131 link_info_size += info->links[link].addr ? ETH_ALEN : 0; 1132 link_info_size += info->links[link].bssid ? ETH_ALEN : 0; 1133 1134 if (info->links[link].bss) 1135 continue; 1136 1137 info->links[link].bss = 1138 cfg80211_get_bss(wdev->wiphy, 1139 info->links[link].channel, 1140 info->links[link].bssid, 1141 wdev->u.client.ssid, 1142 wdev->u.client.ssid_len, 1143 wdev->conn_bss_type, 1144 IEEE80211_PRIVACY_ANY); 1145 1146 if (!info->links[link].bss) { 1147 bss_not_found = true; 1148 break; 1149 } 1150 } 1151 1152 if (WARN_ON(bss_not_found)) 1153 goto out; 1154 1155 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 1156 info->fils.kek_len + info->fils.pmk_len + 1157 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) + 1158 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp); 1159 if (!ev) 1160 goto out; 1161 1162 ev->type = EVENT_ROAMED; 1163 next = ((u8 *)ev) + sizeof(*ev); 1164 if (info->req_ie_len) { 1165 ev->rm.req_ie = next; 1166 ev->rm.req_ie_len = info->req_ie_len; 1167 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 1168 next += info->req_ie_len; 1169 } 1170 if (info->resp_ie_len) { 1171 ev->rm.resp_ie = next; 1172 ev->rm.resp_ie_len = info->resp_ie_len; 1173 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1174 info->resp_ie_len); 1175 next += info->resp_ie_len; 1176 } 1177 if (info->fils.kek_len) { 1178 ev->rm.fils.kek = next; 1179 ev->rm.fils.kek_len = info->fils.kek_len; 1180 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1181 info->fils.kek_len); 1182 next += info->fils.kek_len; 1183 } 1184 if (info->fils.pmk_len) { 1185 ev->rm.fils.pmk = next; 1186 ev->rm.fils.pmk_len = info->fils.pmk_len; 1187 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1188 info->fils.pmk_len); 1189 next += info->fils.pmk_len; 1190 } 1191 if (info->fils.pmkid) { 1192 ev->rm.fils.pmkid = next; 1193 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1194 WLAN_PMKID_LEN); 1195 next += WLAN_PMKID_LEN; 1196 } 1197 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1198 if (info->fils.update_erp_next_seq_num) 1199 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1200 if (info->ap_mld_addr) { 1201 ev->rm.ap_mld_addr = next; 1202 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr, 1203 ETH_ALEN); 1204 next += ETH_ALEN; 1205 } 1206 ev->rm.valid_links = info->valid_links; 1207 for_each_valid_link(info, link) { 1208 ev->rm.links[link].bss = info->links[link].bss; 1209 1210 if (info->links[link].addr) { 1211 ev->rm.links[link].addr = next; 1212 memcpy((void *)ev->rm.links[link].addr, 1213 info->links[link].addr, 1214 ETH_ALEN); 1215 next += ETH_ALEN; 1216 } 1217 1218 if (info->links[link].bssid) { 1219 ev->rm.links[link].bssid = next; 1220 memcpy((void *)ev->rm.links[link].bssid, 1221 info->links[link].bssid, 1222 ETH_ALEN); 1223 next += ETH_ALEN; 1224 } 1225 } 1226 1227 spin_lock_irqsave(&wdev->event_lock, flags); 1228 list_add_tail(&ev->list, &wdev->event_list); 1229 spin_unlock_irqrestore(&wdev->event_lock, flags); 1230 queue_work(cfg80211_wq, &rdev->event_work); 1231 1232 return; 1233 out: 1234 for_each_valid_link(info, link) 1235 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1236 1237 } 1238 EXPORT_SYMBOL(cfg80211_roamed); 1239 1240 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid) 1241 { 1242 ASSERT_WDEV_LOCK(wdev); 1243 1244 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1245 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1246 return; 1247 1248 if (WARN_ON(!wdev->connected) || 1249 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid))) 1250 return; 1251 1252 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1253 bssid); 1254 } 1255 1256 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1257 gfp_t gfp) 1258 { 1259 struct wireless_dev *wdev = dev->ieee80211_ptr; 1260 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1261 struct cfg80211_event *ev; 1262 unsigned long flags; 1263 1264 if (WARN_ON(!bssid)) 1265 return; 1266 1267 ev = kzalloc(sizeof(*ev), gfp); 1268 if (!ev) 1269 return; 1270 1271 ev->type = EVENT_PORT_AUTHORIZED; 1272 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1273 1274 /* 1275 * Use the wdev event list so that if there are pending 1276 * connected/roamed events, they will be reported first. 1277 */ 1278 spin_lock_irqsave(&wdev->event_lock, flags); 1279 list_add_tail(&ev->list, &wdev->event_list); 1280 spin_unlock_irqrestore(&wdev->event_lock, flags); 1281 queue_work(cfg80211_wq, &rdev->event_work); 1282 } 1283 EXPORT_SYMBOL(cfg80211_port_authorized); 1284 1285 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1286 size_t ie_len, u16 reason, bool from_ap) 1287 { 1288 struct wireless_dev *wdev = dev->ieee80211_ptr; 1289 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1290 int i; 1291 #ifdef CONFIG_CFG80211_WEXT 1292 union iwreq_data wrqu; 1293 #endif 1294 1295 ASSERT_WDEV_LOCK(wdev); 1296 1297 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1298 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1299 return; 1300 1301 cfg80211_wdev_release_bsses(wdev); 1302 wdev->connected = false; 1303 wdev->u.client.ssid_len = 0; 1304 wdev->conn_owner_nlportid = 0; 1305 kfree_sensitive(wdev->connect_keys); 1306 wdev->connect_keys = NULL; 1307 1308 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1309 1310 /* stop critical protocol if supported */ 1311 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1312 rdev->crit_proto_nlportid = 0; 1313 rdev_crit_proto_stop(rdev, wdev); 1314 } 1315 1316 /* 1317 * Delete all the keys ... pairwise keys can't really 1318 * exist any more anyway, but default keys might. 1319 */ 1320 if (rdev->ops->del_key) { 1321 int max_key_idx = 5; 1322 1323 if (wiphy_ext_feature_isset( 1324 wdev->wiphy, 1325 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1326 wiphy_ext_feature_isset( 1327 wdev->wiphy, 1328 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1329 max_key_idx = 7; 1330 for (i = 0; i <= max_key_idx; i++) 1331 rdev_del_key(rdev, dev, -1, i, false, NULL); 1332 } 1333 1334 rdev_set_qos_map(rdev, dev, NULL); 1335 1336 #ifdef CONFIG_CFG80211_WEXT 1337 memset(&wrqu, 0, sizeof(wrqu)); 1338 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1339 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1340 wdev->wext.connect.ssid_len = 0; 1341 #endif 1342 1343 schedule_work(&cfg80211_disconnect_work); 1344 } 1345 1346 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1347 const u8 *ie, size_t ie_len, 1348 bool locally_generated, gfp_t gfp) 1349 { 1350 struct wireless_dev *wdev = dev->ieee80211_ptr; 1351 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1352 struct cfg80211_event *ev; 1353 unsigned long flags; 1354 1355 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1356 if (!ev) 1357 return; 1358 1359 ev->type = EVENT_DISCONNECTED; 1360 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1361 ev->dc.ie_len = ie_len; 1362 memcpy((void *)ev->dc.ie, ie, ie_len); 1363 ev->dc.reason = reason; 1364 ev->dc.locally_generated = locally_generated; 1365 1366 spin_lock_irqsave(&wdev->event_lock, flags); 1367 list_add_tail(&ev->list, &wdev->event_list); 1368 spin_unlock_irqrestore(&wdev->event_lock, flags); 1369 queue_work(cfg80211_wq, &rdev->event_work); 1370 } 1371 EXPORT_SYMBOL(cfg80211_disconnected); 1372 1373 /* 1374 * API calls for nl80211/wext compatibility code 1375 */ 1376 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1377 struct net_device *dev, 1378 struct cfg80211_connect_params *connect, 1379 struct cfg80211_cached_keys *connkeys, 1380 const u8 *prev_bssid) 1381 { 1382 struct wireless_dev *wdev = dev->ieee80211_ptr; 1383 int err; 1384 1385 ASSERT_WDEV_LOCK(wdev); 1386 1387 /* 1388 * If we have an ssid_len, we're trying to connect or are 1389 * already connected, so reject a new SSID unless it's the 1390 * same (which is the case for re-association.) 1391 */ 1392 if (wdev->u.client.ssid_len && 1393 (wdev->u.client.ssid_len != connect->ssid_len || 1394 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) 1395 return -EALREADY; 1396 1397 /* 1398 * If connected, reject (re-)association unless prev_bssid 1399 * matches the current BSSID. 1400 */ 1401 if (wdev->connected) { 1402 if (!prev_bssid) 1403 return -EALREADY; 1404 if (!ether_addr_equal(prev_bssid, 1405 wdev->u.client.connected_addr)) 1406 return -ENOTCONN; 1407 } 1408 1409 /* 1410 * Reject if we're in the process of connecting with WEP, 1411 * this case isn't very interesting and trying to handle 1412 * it would make the code much more complex. 1413 */ 1414 if (wdev->connect_keys) 1415 return -EINPROGRESS; 1416 1417 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1418 rdev->wiphy.ht_capa_mod_mask); 1419 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1420 rdev->wiphy.vht_capa_mod_mask); 1421 1422 if (connkeys && connkeys->def >= 0) { 1423 int idx; 1424 u32 cipher; 1425 1426 idx = connkeys->def; 1427 cipher = connkeys->params[idx].cipher; 1428 /* If given a WEP key we may need it for shared key auth */ 1429 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1430 cipher == WLAN_CIPHER_SUITE_WEP104) { 1431 connect->key_idx = idx; 1432 connect->key = connkeys->params[idx].key; 1433 connect->key_len = connkeys->params[idx].key_len; 1434 1435 /* 1436 * If ciphers are not set (e.g. when going through 1437 * iwconfig), we have to set them appropriately here. 1438 */ 1439 if (connect->crypto.cipher_group == 0) 1440 connect->crypto.cipher_group = cipher; 1441 1442 if (connect->crypto.n_ciphers_pairwise == 0) { 1443 connect->crypto.n_ciphers_pairwise = 1; 1444 connect->crypto.ciphers_pairwise[0] = cipher; 1445 } 1446 } 1447 1448 connect->crypto.wep_keys = connkeys->params; 1449 connect->crypto.wep_tx_key = connkeys->def; 1450 } else { 1451 if (WARN_ON(connkeys)) 1452 return -EINVAL; 1453 } 1454 1455 wdev->connect_keys = connkeys; 1456 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); 1457 wdev->u.client.ssid_len = connect->ssid_len; 1458 1459 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1460 IEEE80211_BSS_TYPE_ESS; 1461 1462 if (!rdev->ops->connect) 1463 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1464 else 1465 err = rdev_connect(rdev, dev, connect); 1466 1467 if (err) { 1468 wdev->connect_keys = NULL; 1469 /* 1470 * This could be reassoc getting refused, don't clear 1471 * ssid_len in that case. 1472 */ 1473 if (!wdev->connected) 1474 wdev->u.client.ssid_len = 0; 1475 return err; 1476 } 1477 1478 return 0; 1479 } 1480 1481 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1482 struct net_device *dev, u16 reason, bool wextev) 1483 { 1484 struct wireless_dev *wdev = dev->ieee80211_ptr; 1485 int err = 0; 1486 1487 ASSERT_WDEV_LOCK(wdev); 1488 1489 kfree_sensitive(wdev->connect_keys); 1490 wdev->connect_keys = NULL; 1491 1492 wdev->conn_owner_nlportid = 0; 1493 1494 if (wdev->conn) 1495 err = cfg80211_sme_disconnect(wdev, reason); 1496 else if (!rdev->ops->disconnect) 1497 cfg80211_mlme_down(rdev, dev); 1498 else if (wdev->u.client.ssid_len) 1499 err = rdev_disconnect(rdev, dev, reason); 1500 1501 /* 1502 * Clear ssid_len unless we actually were fully connected, 1503 * in which case cfg80211_disconnected() will take care of 1504 * this later. 1505 */ 1506 if (!wdev->connected) 1507 wdev->u.client.ssid_len = 0; 1508 1509 return err; 1510 } 1511 1512 /* 1513 * Used to clean up after the connection / connection attempt owner socket 1514 * disconnects 1515 */ 1516 void cfg80211_autodisconnect_wk(struct work_struct *work) 1517 { 1518 struct wireless_dev *wdev = 1519 container_of(work, struct wireless_dev, disconnect_wk); 1520 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1521 1522 wdev_lock(wdev); 1523 1524 if (wdev->conn_owner_nlportid) { 1525 switch (wdev->iftype) { 1526 case NL80211_IFTYPE_ADHOC: 1527 __cfg80211_leave_ibss(rdev, wdev->netdev, false); 1528 break; 1529 case NL80211_IFTYPE_AP: 1530 case NL80211_IFTYPE_P2P_GO: 1531 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false); 1532 break; 1533 case NL80211_IFTYPE_MESH_POINT: 1534 __cfg80211_leave_mesh(rdev, wdev->netdev); 1535 break; 1536 case NL80211_IFTYPE_STATION: 1537 case NL80211_IFTYPE_P2P_CLIENT: 1538 /* 1539 * Use disconnect_bssid if still connecting and 1540 * ops->disconnect not implemented. Otherwise we can 1541 * use cfg80211_disconnect. 1542 */ 1543 if (rdev->ops->disconnect || wdev->connected) 1544 cfg80211_disconnect(rdev, wdev->netdev, 1545 WLAN_REASON_DEAUTH_LEAVING, 1546 true); 1547 else 1548 cfg80211_mlme_deauth(rdev, wdev->netdev, 1549 wdev->disconnect_bssid, 1550 NULL, 0, 1551 WLAN_REASON_DEAUTH_LEAVING, 1552 false); 1553 break; 1554 default: 1555 break; 1556 } 1557 } 1558 1559 wdev_unlock(wdev); 1560 } 1561