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 } 751 752 wdev->unprot_beacon_reported = 0; 753 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 754 GFP_KERNEL); 755 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid; 756 757 #ifdef CONFIG_CFG80211_WEXT 758 if (wextev && !cr->valid_links) { 759 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 760 memset(&wrqu, 0, sizeof(wrqu)); 761 wrqu.data.length = cr->req_ie_len; 762 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 763 cr->req_ie); 764 } 765 766 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 767 memset(&wrqu, 0, sizeof(wrqu)); 768 wrqu.data.length = cr->resp_ie_len; 769 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 770 cr->resp_ie); 771 } 772 773 memset(&wrqu, 0, sizeof(wrqu)); 774 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 775 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) { 776 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 777 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 778 wdev->wext.prev_bssid_valid = true; 779 } 780 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 781 } 782 #endif 783 784 if (cr->status == WLAN_STATUS_SUCCESS) { 785 for_each_valid_link(cr, link) { 786 if (WARN_ON_ONCE(!cr->links[link].bss)) 787 break; 788 } 789 790 for_each_valid_link(cr, link) { 791 if (cr->links[link].bss) 792 continue; 793 794 cr->links[link].bss = 795 cfg80211_get_bss(wdev->wiphy, NULL, 796 cr->links[link].bssid, 797 wdev->u.client.ssid, 798 wdev->u.client.ssid_len, 799 wdev->conn_bss_type, 800 IEEE80211_PRIVACY_ANY); 801 if (!cr->links[link].bss) { 802 bss_not_found = true; 803 break; 804 } 805 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss)); 806 } 807 } 808 809 cfg80211_wdev_release_bsses(wdev); 810 811 if (cr->status != WLAN_STATUS_SUCCESS) { 812 kfree_sensitive(wdev->connect_keys); 813 wdev->connect_keys = NULL; 814 wdev->u.client.ssid_len = 0; 815 wdev->conn_owner_nlportid = 0; 816 cfg80211_connect_result_release_bsses(wdev, cr); 817 cfg80211_sme_free(wdev); 818 return; 819 } 820 821 if (WARN_ON(bss_not_found)) { 822 cfg80211_connect_result_release_bsses(wdev, cr); 823 return; 824 } 825 826 memset(wdev->links, 0, sizeof(wdev->links)); 827 wdev->valid_links = cr->valid_links; 828 for_each_valid_link(cr, link) 829 wdev->links[link].client.current_bss = 830 bss_from_pub(cr->links[link].bss); 831 wdev->connected = true; 832 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 833 if (cr->valid_links) { 834 for_each_valid_link(cr, link) 835 memcpy(wdev->links[link].addr, cr->links[link].addr, 836 ETH_ALEN); 837 } 838 839 if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP)) 840 cfg80211_upload_connect_keys(wdev); 841 842 rcu_read_lock(); 843 for_each_valid_link(cr, link) { 844 country_elem = 845 ieee80211_bss_get_elem(cr->links[link].bss, 846 WLAN_EID_COUNTRY); 847 if (country_elem) 848 break; 849 } 850 if (!country_elem) { 851 rcu_read_unlock(); 852 return; 853 } 854 855 country_datalen = country_elem->datalen; 856 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 857 rcu_read_unlock(); 858 859 if (!country_data) 860 return; 861 862 regulatory_hint_country_ie(wdev->wiphy, 863 cr->links[link].bss->channel->band, 864 country_data, country_datalen); 865 kfree(country_data); 866 867 return; 868 out: 869 for_each_valid_link(cr, link) 870 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 871 } 872 873 static void cfg80211_update_link_bss(struct wireless_dev *wdev, 874 struct cfg80211_bss **bss) 875 { 876 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 877 struct cfg80211_internal_bss *ibss; 878 879 if (!*bss) 880 return; 881 882 ibss = bss_from_pub(*bss); 883 if (list_empty(&ibss->list)) { 884 struct cfg80211_bss *found = NULL, *tmp = *bss; 885 886 found = cfg80211_get_bss(wdev->wiphy, NULL, 887 (*bss)->bssid, 888 wdev->u.client.ssid, 889 wdev->u.client.ssid_len, 890 wdev->conn_bss_type, 891 IEEE80211_PRIVACY_ANY); 892 if (found) { 893 /* The same BSS is already updated so use it 894 * instead, as it has latest info. 895 */ 896 *bss = found; 897 } else { 898 /* Update with BSS provided by driver, it will 899 * be freshly added and ref cnted, we can free 900 * the old one. 901 * 902 * signal_valid can be false, as we are not 903 * expecting the BSS to be found. 904 * 905 * keep the old timestamp to avoid confusion 906 */ 907 cfg80211_bss_update(rdev, ibss, false, 908 ibss->ts); 909 } 910 911 cfg80211_put_bss(wdev->wiphy, tmp); 912 } 913 } 914 915 /* Consumes bss object(s) one way or another */ 916 void cfg80211_connect_done(struct net_device *dev, 917 struct cfg80211_connect_resp_params *params, 918 gfp_t gfp) 919 { 920 struct wireless_dev *wdev = dev->ieee80211_ptr; 921 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 922 struct cfg80211_event *ev; 923 unsigned long flags; 924 u8 *next; 925 size_t link_info_size = 0; 926 unsigned int link; 927 928 for_each_valid_link(params, link) { 929 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss); 930 link_info_size += params->links[link].bssid ? ETH_ALEN : 0; 931 link_info_size += params->links[link].addr ? ETH_ALEN : 0; 932 } 933 934 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) + 935 params->req_ie_len + params->resp_ie_len + 936 params->fils.kek_len + params->fils.pmk_len + 937 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size, 938 gfp); 939 940 if (!ev) { 941 for_each_valid_link(params, link) 942 cfg80211_put_bss(wdev->wiphy, 943 params->links[link].bss); 944 return; 945 } 946 947 ev->type = EVENT_CONNECT_RESULT; 948 next = ((u8 *)ev) + sizeof(*ev); 949 if (params->ap_mld_addr) { 950 ev->cr.ap_mld_addr = next; 951 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr, 952 ETH_ALEN); 953 next += ETH_ALEN; 954 } 955 if (params->req_ie_len) { 956 ev->cr.req_ie = next; 957 ev->cr.req_ie_len = params->req_ie_len; 958 memcpy((void *)ev->cr.req_ie, params->req_ie, 959 params->req_ie_len); 960 next += params->req_ie_len; 961 } 962 if (params->resp_ie_len) { 963 ev->cr.resp_ie = next; 964 ev->cr.resp_ie_len = params->resp_ie_len; 965 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 966 params->resp_ie_len); 967 next += params->resp_ie_len; 968 } 969 if (params->fils.kek_len) { 970 ev->cr.fils.kek = next; 971 ev->cr.fils.kek_len = params->fils.kek_len; 972 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 973 params->fils.kek_len); 974 next += params->fils.kek_len; 975 } 976 if (params->fils.pmk_len) { 977 ev->cr.fils.pmk = next; 978 ev->cr.fils.pmk_len = params->fils.pmk_len; 979 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 980 params->fils.pmk_len); 981 next += params->fils.pmk_len; 982 } 983 if (params->fils.pmkid) { 984 ev->cr.fils.pmkid = next; 985 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 986 WLAN_PMKID_LEN); 987 next += WLAN_PMKID_LEN; 988 } 989 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 990 if (params->fils.update_erp_next_seq_num) 991 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 992 ev->cr.valid_links = params->valid_links; 993 for_each_valid_link(params, link) { 994 if (params->links[link].bss) 995 cfg80211_hold_bss( 996 bss_from_pub(params->links[link].bss)); 997 ev->cr.links[link].bss = params->links[link].bss; 998 999 if (params->links[link].addr) { 1000 ev->cr.links[link].addr = next; 1001 memcpy((void *)ev->cr.links[link].addr, 1002 params->links[link].addr, 1003 ETH_ALEN); 1004 next += ETH_ALEN; 1005 } 1006 if (params->links[link].bssid) { 1007 ev->cr.links[link].bssid = next; 1008 memcpy((void *)ev->cr.links[link].bssid, 1009 params->links[link].bssid, 1010 ETH_ALEN); 1011 next += ETH_ALEN; 1012 } 1013 } 1014 ev->cr.status = params->status; 1015 ev->cr.timeout_reason = params->timeout_reason; 1016 1017 spin_lock_irqsave(&wdev->event_lock, flags); 1018 list_add_tail(&ev->list, &wdev->event_list); 1019 spin_unlock_irqrestore(&wdev->event_lock, flags); 1020 queue_work(cfg80211_wq, &rdev->event_work); 1021 } 1022 EXPORT_SYMBOL(cfg80211_connect_done); 1023 1024 /* Consumes bss object one way or another */ 1025 void __cfg80211_roamed(struct wireless_dev *wdev, 1026 struct cfg80211_roam_info *info) 1027 { 1028 #ifdef CONFIG_CFG80211_WEXT 1029 union iwreq_data wrqu; 1030 #endif 1031 unsigned int link; 1032 const u8 *connected_addr; 1033 1034 ASSERT_WDEV_LOCK(wdev); 1035 1036 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1037 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1038 goto out; 1039 1040 if (WARN_ON(!wdev->connected)) 1041 goto out; 1042 1043 if (info->valid_links) { 1044 if (WARN_ON(!info->ap_mld_addr)) 1045 goto out; 1046 1047 for_each_valid_link(info, link) { 1048 if (WARN_ON(!info->links[link].addr)) 1049 goto out; 1050 } 1051 } 1052 1053 cfg80211_wdev_release_bsses(wdev); 1054 1055 for_each_valid_link(info, link) { 1056 if (WARN_ON(!info->links[link].bss)) 1057 goto out; 1058 } 1059 1060 memset(wdev->links, 0, sizeof(wdev->links)); 1061 wdev->valid_links = info->valid_links; 1062 for_each_valid_link(info, link) { 1063 cfg80211_hold_bss(bss_from_pub(info->links[link].bss)); 1064 wdev->links[link].client.current_bss = 1065 bss_from_pub(info->links[link].bss); 1066 } 1067 1068 connected_addr = info->valid_links ? 1069 info->ap_mld_addr : 1070 info->links[0].bss->bssid; 1071 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 1072 if (info->valid_links) { 1073 for_each_valid_link(info, link) 1074 memcpy(wdev->links[link].addr, info->links[link].addr, 1075 ETH_ALEN); 1076 } 1077 wdev->unprot_beacon_reported = 0; 1078 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 1079 wdev->netdev, info, GFP_KERNEL); 1080 1081 #ifdef CONFIG_CFG80211_WEXT 1082 if (!info->valid_links) { 1083 if (info->req_ie) { 1084 memset(&wrqu, 0, sizeof(wrqu)); 1085 wrqu.data.length = info->req_ie_len; 1086 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 1087 &wrqu, info->req_ie); 1088 } 1089 1090 if (info->resp_ie) { 1091 memset(&wrqu, 0, sizeof(wrqu)); 1092 wrqu.data.length = info->resp_ie_len; 1093 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 1094 &wrqu, info->resp_ie); 1095 } 1096 1097 memset(&wrqu, 0, sizeof(wrqu)); 1098 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1099 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 1100 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 1101 wdev->wext.prev_bssid_valid = true; 1102 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 1103 } 1104 #endif 1105 1106 return; 1107 out: 1108 for_each_valid_link(info, link) 1109 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1110 } 1111 1112 /* Consumes info->links.bss object(s) one way or another */ 1113 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 1114 gfp_t gfp) 1115 { 1116 struct wireless_dev *wdev = dev->ieee80211_ptr; 1117 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1118 struct cfg80211_event *ev; 1119 unsigned long flags; 1120 u8 *next; 1121 unsigned int link; 1122 size_t link_info_size = 0; 1123 bool bss_not_found = false; 1124 1125 for_each_valid_link(info, link) { 1126 link_info_size += info->links[link].addr ? ETH_ALEN : 0; 1127 link_info_size += info->links[link].bssid ? ETH_ALEN : 0; 1128 1129 if (info->links[link].bss) 1130 continue; 1131 1132 info->links[link].bss = 1133 cfg80211_get_bss(wdev->wiphy, 1134 info->links[link].channel, 1135 info->links[link].bssid, 1136 wdev->u.client.ssid, 1137 wdev->u.client.ssid_len, 1138 wdev->conn_bss_type, 1139 IEEE80211_PRIVACY_ANY); 1140 1141 if (!info->links[link].bss) { 1142 bss_not_found = true; 1143 break; 1144 } 1145 } 1146 1147 if (WARN_ON(bss_not_found)) 1148 goto out; 1149 1150 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 1151 info->fils.kek_len + info->fils.pmk_len + 1152 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) + 1153 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp); 1154 if (!ev) 1155 goto out; 1156 1157 ev->type = EVENT_ROAMED; 1158 next = ((u8 *)ev) + sizeof(*ev); 1159 if (info->req_ie_len) { 1160 ev->rm.req_ie = next; 1161 ev->rm.req_ie_len = info->req_ie_len; 1162 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 1163 next += info->req_ie_len; 1164 } 1165 if (info->resp_ie_len) { 1166 ev->rm.resp_ie = next; 1167 ev->rm.resp_ie_len = info->resp_ie_len; 1168 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1169 info->resp_ie_len); 1170 next += info->resp_ie_len; 1171 } 1172 if (info->fils.kek_len) { 1173 ev->rm.fils.kek = next; 1174 ev->rm.fils.kek_len = info->fils.kek_len; 1175 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1176 info->fils.kek_len); 1177 next += info->fils.kek_len; 1178 } 1179 if (info->fils.pmk_len) { 1180 ev->rm.fils.pmk = next; 1181 ev->rm.fils.pmk_len = info->fils.pmk_len; 1182 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1183 info->fils.pmk_len); 1184 next += info->fils.pmk_len; 1185 } 1186 if (info->fils.pmkid) { 1187 ev->rm.fils.pmkid = next; 1188 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1189 WLAN_PMKID_LEN); 1190 next += WLAN_PMKID_LEN; 1191 } 1192 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1193 if (info->fils.update_erp_next_seq_num) 1194 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1195 if (info->ap_mld_addr) { 1196 ev->rm.ap_mld_addr = next; 1197 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr, 1198 ETH_ALEN); 1199 next += ETH_ALEN; 1200 } 1201 ev->rm.valid_links = info->valid_links; 1202 for_each_valid_link(info, link) { 1203 ev->rm.links[link].bss = info->links[link].bss; 1204 1205 if (info->links[link].addr) { 1206 ev->rm.links[link].addr = next; 1207 memcpy((void *)ev->rm.links[link].addr, 1208 info->links[link].addr, 1209 ETH_ALEN); 1210 next += ETH_ALEN; 1211 } 1212 1213 if (info->links[link].bssid) { 1214 ev->rm.links[link].bssid = next; 1215 memcpy((void *)ev->rm.links[link].bssid, 1216 info->links[link].bssid, 1217 ETH_ALEN); 1218 next += ETH_ALEN; 1219 } 1220 } 1221 1222 spin_lock_irqsave(&wdev->event_lock, flags); 1223 list_add_tail(&ev->list, &wdev->event_list); 1224 spin_unlock_irqrestore(&wdev->event_lock, flags); 1225 queue_work(cfg80211_wq, &rdev->event_work); 1226 1227 return; 1228 out: 1229 for_each_valid_link(info, link) 1230 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1231 1232 } 1233 EXPORT_SYMBOL(cfg80211_roamed); 1234 1235 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid) 1236 { 1237 ASSERT_WDEV_LOCK(wdev); 1238 1239 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1240 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1241 return; 1242 1243 if (WARN_ON(!wdev->connected) || 1244 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid))) 1245 return; 1246 1247 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1248 bssid); 1249 } 1250 1251 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1252 gfp_t gfp) 1253 { 1254 struct wireless_dev *wdev = dev->ieee80211_ptr; 1255 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1256 struct cfg80211_event *ev; 1257 unsigned long flags; 1258 1259 if (WARN_ON(!bssid)) 1260 return; 1261 1262 ev = kzalloc(sizeof(*ev), gfp); 1263 if (!ev) 1264 return; 1265 1266 ev->type = EVENT_PORT_AUTHORIZED; 1267 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1268 1269 /* 1270 * Use the wdev event list so that if there are pending 1271 * connected/roamed events, they will be reported first. 1272 */ 1273 spin_lock_irqsave(&wdev->event_lock, flags); 1274 list_add_tail(&ev->list, &wdev->event_list); 1275 spin_unlock_irqrestore(&wdev->event_lock, flags); 1276 queue_work(cfg80211_wq, &rdev->event_work); 1277 } 1278 EXPORT_SYMBOL(cfg80211_port_authorized); 1279 1280 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1281 size_t ie_len, u16 reason, bool from_ap) 1282 { 1283 struct wireless_dev *wdev = dev->ieee80211_ptr; 1284 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1285 int i; 1286 #ifdef CONFIG_CFG80211_WEXT 1287 union iwreq_data wrqu; 1288 #endif 1289 1290 ASSERT_WDEV_LOCK(wdev); 1291 1292 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1293 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1294 return; 1295 1296 cfg80211_wdev_release_bsses(wdev); 1297 wdev->connected = false; 1298 wdev->u.client.ssid_len = 0; 1299 wdev->conn_owner_nlportid = 0; 1300 kfree_sensitive(wdev->connect_keys); 1301 wdev->connect_keys = NULL; 1302 1303 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1304 1305 /* stop critical protocol if supported */ 1306 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1307 rdev->crit_proto_nlportid = 0; 1308 rdev_crit_proto_stop(rdev, wdev); 1309 } 1310 1311 /* 1312 * Delete all the keys ... pairwise keys can't really 1313 * exist any more anyway, but default keys might. 1314 */ 1315 if (rdev->ops->del_key) { 1316 int max_key_idx = 5; 1317 1318 if (wiphy_ext_feature_isset( 1319 wdev->wiphy, 1320 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1321 wiphy_ext_feature_isset( 1322 wdev->wiphy, 1323 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1324 max_key_idx = 7; 1325 for (i = 0; i <= max_key_idx; i++) 1326 rdev_del_key(rdev, dev, i, false, NULL); 1327 } 1328 1329 rdev_set_qos_map(rdev, dev, NULL); 1330 1331 #ifdef CONFIG_CFG80211_WEXT 1332 memset(&wrqu, 0, sizeof(wrqu)); 1333 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1334 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1335 wdev->wext.connect.ssid_len = 0; 1336 #endif 1337 1338 schedule_work(&cfg80211_disconnect_work); 1339 } 1340 1341 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1342 const u8 *ie, size_t ie_len, 1343 bool locally_generated, gfp_t gfp) 1344 { 1345 struct wireless_dev *wdev = dev->ieee80211_ptr; 1346 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1347 struct cfg80211_event *ev; 1348 unsigned long flags; 1349 1350 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1351 if (!ev) 1352 return; 1353 1354 ev->type = EVENT_DISCONNECTED; 1355 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1356 ev->dc.ie_len = ie_len; 1357 memcpy((void *)ev->dc.ie, ie, ie_len); 1358 ev->dc.reason = reason; 1359 ev->dc.locally_generated = locally_generated; 1360 1361 spin_lock_irqsave(&wdev->event_lock, flags); 1362 list_add_tail(&ev->list, &wdev->event_list); 1363 spin_unlock_irqrestore(&wdev->event_lock, flags); 1364 queue_work(cfg80211_wq, &rdev->event_work); 1365 } 1366 EXPORT_SYMBOL(cfg80211_disconnected); 1367 1368 /* 1369 * API calls for nl80211/wext compatibility code 1370 */ 1371 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1372 struct net_device *dev, 1373 struct cfg80211_connect_params *connect, 1374 struct cfg80211_cached_keys *connkeys, 1375 const u8 *prev_bssid) 1376 { 1377 struct wireless_dev *wdev = dev->ieee80211_ptr; 1378 int err; 1379 1380 ASSERT_WDEV_LOCK(wdev); 1381 1382 /* 1383 * If we have an ssid_len, we're trying to connect or are 1384 * already connected, so reject a new SSID unless it's the 1385 * same (which is the case for re-association.) 1386 */ 1387 if (wdev->u.client.ssid_len && 1388 (wdev->u.client.ssid_len != connect->ssid_len || 1389 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) 1390 return -EALREADY; 1391 1392 /* 1393 * If connected, reject (re-)association unless prev_bssid 1394 * matches the current BSSID. 1395 */ 1396 if (wdev->connected) { 1397 if (!prev_bssid) 1398 return -EALREADY; 1399 if (!ether_addr_equal(prev_bssid, 1400 wdev->u.client.connected_addr)) 1401 return -ENOTCONN; 1402 } 1403 1404 /* 1405 * Reject if we're in the process of connecting with WEP, 1406 * this case isn't very interesting and trying to handle 1407 * it would make the code much more complex. 1408 */ 1409 if (wdev->connect_keys) 1410 return -EINPROGRESS; 1411 1412 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1413 rdev->wiphy.ht_capa_mod_mask); 1414 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1415 rdev->wiphy.vht_capa_mod_mask); 1416 1417 if (connkeys && connkeys->def >= 0) { 1418 int idx; 1419 u32 cipher; 1420 1421 idx = connkeys->def; 1422 cipher = connkeys->params[idx].cipher; 1423 /* If given a WEP key we may need it for shared key auth */ 1424 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1425 cipher == WLAN_CIPHER_SUITE_WEP104) { 1426 connect->key_idx = idx; 1427 connect->key = connkeys->params[idx].key; 1428 connect->key_len = connkeys->params[idx].key_len; 1429 1430 /* 1431 * If ciphers are not set (e.g. when going through 1432 * iwconfig), we have to set them appropriately here. 1433 */ 1434 if (connect->crypto.cipher_group == 0) 1435 connect->crypto.cipher_group = cipher; 1436 1437 if (connect->crypto.n_ciphers_pairwise == 0) { 1438 connect->crypto.n_ciphers_pairwise = 1; 1439 connect->crypto.ciphers_pairwise[0] = cipher; 1440 } 1441 } 1442 1443 connect->crypto.wep_keys = connkeys->params; 1444 connect->crypto.wep_tx_key = connkeys->def; 1445 } else { 1446 if (WARN_ON(connkeys)) 1447 return -EINVAL; 1448 } 1449 1450 wdev->connect_keys = connkeys; 1451 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); 1452 wdev->u.client.ssid_len = connect->ssid_len; 1453 1454 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1455 IEEE80211_BSS_TYPE_ESS; 1456 1457 if (!rdev->ops->connect) 1458 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1459 else 1460 err = rdev_connect(rdev, dev, connect); 1461 1462 if (err) { 1463 wdev->connect_keys = NULL; 1464 /* 1465 * This could be reassoc getting refused, don't clear 1466 * ssid_len in that case. 1467 */ 1468 if (!wdev->connected) 1469 wdev->u.client.ssid_len = 0; 1470 return err; 1471 } 1472 1473 return 0; 1474 } 1475 1476 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1477 struct net_device *dev, u16 reason, bool wextev) 1478 { 1479 struct wireless_dev *wdev = dev->ieee80211_ptr; 1480 int err = 0; 1481 1482 ASSERT_WDEV_LOCK(wdev); 1483 1484 kfree_sensitive(wdev->connect_keys); 1485 wdev->connect_keys = NULL; 1486 1487 wdev->conn_owner_nlportid = 0; 1488 1489 if (wdev->conn) 1490 err = cfg80211_sme_disconnect(wdev, reason); 1491 else if (!rdev->ops->disconnect) 1492 cfg80211_mlme_down(rdev, dev); 1493 else if (wdev->u.client.ssid_len) 1494 err = rdev_disconnect(rdev, dev, reason); 1495 1496 /* 1497 * Clear ssid_len unless we actually were fully connected, 1498 * in which case cfg80211_disconnected() will take care of 1499 * this later. 1500 */ 1501 if (!wdev->connected) 1502 wdev->u.client.ssid_len = 0; 1503 1504 return err; 1505 } 1506 1507 /* 1508 * Used to clean up after the connection / connection attempt owner socket 1509 * disconnects 1510 */ 1511 void cfg80211_autodisconnect_wk(struct work_struct *work) 1512 { 1513 struct wireless_dev *wdev = 1514 container_of(work, struct wireless_dev, disconnect_wk); 1515 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1516 1517 wdev_lock(wdev); 1518 1519 if (wdev->conn_owner_nlportid) { 1520 switch (wdev->iftype) { 1521 case NL80211_IFTYPE_ADHOC: 1522 __cfg80211_leave_ibss(rdev, wdev->netdev, false); 1523 break; 1524 case NL80211_IFTYPE_AP: 1525 case NL80211_IFTYPE_P2P_GO: 1526 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false); 1527 break; 1528 case NL80211_IFTYPE_MESH_POINT: 1529 __cfg80211_leave_mesh(rdev, wdev->netdev); 1530 break; 1531 case NL80211_IFTYPE_STATION: 1532 case NL80211_IFTYPE_P2P_CLIENT: 1533 /* 1534 * Use disconnect_bssid if still connecting and 1535 * ops->disconnect not implemented. Otherwise we can 1536 * use cfg80211_disconnect. 1537 */ 1538 if (rdev->ops->disconnect || wdev->connected) 1539 cfg80211_disconnect(rdev, wdev->netdev, 1540 WLAN_REASON_DEAUTH_LEAVING, 1541 true); 1542 else 1543 cfg80211_mlme_deauth(rdev, wdev->netdev, 1544 wdev->disconnect_bssid, 1545 NULL, 0, 1546 WLAN_REASON_DEAUTH_LEAVING, 1547 false); 1548 break; 1549 default: 1550 break; 1551 } 1552 } 1553 1554 wdev_unlock(wdev); 1555 } 1556