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, 2022-2023 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 request->n_channels = n_channels; 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 + 120 struct_size(request, channels, n_channels); 121 request->n_ssids = 1; 122 123 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 124 wdev->conn->params.ssid_len); 125 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 126 127 eth_broadcast_addr(request->bssid); 128 129 request->wdev = wdev; 130 request->wiphy = &rdev->wiphy; 131 request->scan_start = jiffies; 132 133 rdev->scan_req = request; 134 135 err = rdev_scan(rdev, request); 136 if (!err) { 137 wdev->conn->state = CFG80211_CONN_SCANNING; 138 nl80211_send_scan_start(rdev, wdev); 139 dev_hold(wdev->netdev); 140 } else { 141 rdev->scan_req = NULL; 142 kfree(request); 143 } 144 return err; 145 } 146 147 static int cfg80211_conn_do_work(struct wireless_dev *wdev, 148 enum nl80211_timeout_reason *treason) 149 { 150 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 151 struct cfg80211_connect_params *params; 152 struct cfg80211_auth_request auth_req = {}; 153 struct cfg80211_assoc_request req = {}; 154 int err; 155 156 ASSERT_WDEV_LOCK(wdev); 157 158 if (!wdev->conn) 159 return 0; 160 161 params = &wdev->conn->params; 162 163 switch (wdev->conn->state) { 164 case CFG80211_CONN_SCANNING: 165 /* didn't find it during scan ... */ 166 return -ENOENT; 167 case CFG80211_CONN_SCAN_AGAIN: 168 return cfg80211_conn_scan(wdev); 169 case CFG80211_CONN_AUTHENTICATE_NEXT: 170 if (WARN_ON(!rdev->ops->auth)) 171 return -EOPNOTSUPP; 172 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 173 auth_req.key = params->key; 174 auth_req.key_len = params->key_len; 175 auth_req.key_idx = params->key_idx; 176 auth_req.auth_type = params->auth_type; 177 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, 178 params->bssid, 179 params->ssid, params->ssid_len, 180 IEEE80211_BSS_TYPE_ESS, 181 IEEE80211_PRIVACY_ANY); 182 auth_req.link_id = -1; 183 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req); 184 cfg80211_put_bss(&rdev->wiphy, auth_req.bss); 185 return err; 186 case CFG80211_CONN_AUTH_FAILED_TIMEOUT: 187 *treason = NL80211_TIMEOUT_AUTH; 188 return -ENOTCONN; 189 case CFG80211_CONN_ASSOCIATE_NEXT: 190 if (WARN_ON(!rdev->ops->assoc)) 191 return -EOPNOTSUPP; 192 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 193 if (wdev->conn->prev_bssid_valid) 194 req.prev_bssid = wdev->conn->prev_bssid; 195 req.ie = params->ie; 196 req.ie_len = params->ie_len; 197 req.use_mfp = params->mfp != NL80211_MFP_NO; 198 req.crypto = params->crypto; 199 req.flags = params->flags; 200 req.ht_capa = params->ht_capa; 201 req.ht_capa_mask = params->ht_capa_mask; 202 req.vht_capa = params->vht_capa; 203 req.vht_capa_mask = params->vht_capa_mask; 204 req.link_id = -1; 205 206 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, 207 params->bssid, 208 params->ssid, params->ssid_len, 209 IEEE80211_BSS_TYPE_ESS, 210 IEEE80211_PRIVACY_ANY); 211 if (!req.bss) { 212 err = -ENOENT; 213 } else { 214 err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req); 215 cfg80211_put_bss(&rdev->wiphy, req.bss); 216 } 217 218 if (err) 219 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 220 NULL, 0, 221 WLAN_REASON_DEAUTH_LEAVING, 222 false); 223 return err; 224 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT: 225 *treason = NL80211_TIMEOUT_ASSOC; 226 fallthrough; 227 case CFG80211_CONN_ASSOC_FAILED: 228 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 229 NULL, 0, 230 WLAN_REASON_DEAUTH_LEAVING, false); 231 return -ENOTCONN; 232 case CFG80211_CONN_DEAUTH: 233 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 234 NULL, 0, 235 WLAN_REASON_DEAUTH_LEAVING, false); 236 fallthrough; 237 case CFG80211_CONN_ABANDON: 238 /* free directly, disconnected event already sent */ 239 cfg80211_sme_free(wdev); 240 return 0; 241 default: 242 return 0; 243 } 244 } 245 246 void cfg80211_conn_work(struct work_struct *work) 247 { 248 struct cfg80211_registered_device *rdev = 249 container_of(work, struct cfg80211_registered_device, conn_work); 250 struct wireless_dev *wdev; 251 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 252 enum nl80211_timeout_reason treason; 253 254 wiphy_lock(&rdev->wiphy); 255 256 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 257 if (!wdev->netdev) 258 continue; 259 260 wdev_lock(wdev); 261 if (!netif_running(wdev->netdev)) { 262 wdev_unlock(wdev); 263 continue; 264 } 265 if (!wdev->conn || 266 wdev->conn->state == CFG80211_CONN_CONNECTED) { 267 wdev_unlock(wdev); 268 continue; 269 } 270 if (wdev->conn->params.bssid) { 271 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 272 bssid = bssid_buf; 273 } 274 treason = NL80211_TIMEOUT_UNSPECIFIED; 275 if (cfg80211_conn_do_work(wdev, &treason)) { 276 struct cfg80211_connect_resp_params cr; 277 278 memset(&cr, 0, sizeof(cr)); 279 cr.status = -1; 280 cr.links[0].bssid = bssid; 281 cr.timeout_reason = treason; 282 __cfg80211_connect_result(wdev->netdev, &cr, false); 283 } 284 wdev_unlock(wdev); 285 } 286 287 wiphy_unlock(&rdev->wiphy); 288 } 289 290 static void cfg80211_step_auth_next(struct cfg80211_conn *conn, 291 struct cfg80211_bss *bss) 292 { 293 memcpy(conn->bssid, bss->bssid, ETH_ALEN); 294 conn->params.bssid = conn->bssid; 295 conn->params.channel = bss->channel; 296 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 297 } 298 299 /* Returned bss is reference counted and must be cleaned up appropriately. */ 300 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 301 { 302 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 303 struct cfg80211_bss *bss; 304 305 ASSERT_WDEV_LOCK(wdev); 306 307 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 308 wdev->conn->params.bssid, 309 wdev->conn->params.ssid, 310 wdev->conn->params.ssid_len, 311 wdev->conn_bss_type, 312 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 313 if (!bss) 314 return NULL; 315 316 cfg80211_step_auth_next(wdev->conn, bss); 317 schedule_work(&rdev->conn_work); 318 319 return bss; 320 } 321 322 static void __cfg80211_sme_scan_done(struct net_device *dev) 323 { 324 struct wireless_dev *wdev = dev->ieee80211_ptr; 325 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 326 struct cfg80211_bss *bss; 327 328 ASSERT_WDEV_LOCK(wdev); 329 330 if (!wdev->conn) 331 return; 332 333 if (wdev->conn->state != CFG80211_CONN_SCANNING && 334 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 335 return; 336 337 bss = cfg80211_get_conn_bss(wdev); 338 if (bss) 339 cfg80211_put_bss(&rdev->wiphy, bss); 340 else 341 schedule_work(&rdev->conn_work); 342 } 343 344 void cfg80211_sme_scan_done(struct net_device *dev) 345 { 346 struct wireless_dev *wdev = dev->ieee80211_ptr; 347 348 wdev_lock(wdev); 349 __cfg80211_sme_scan_done(dev); 350 wdev_unlock(wdev); 351 } 352 353 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 354 { 355 struct wiphy *wiphy = wdev->wiphy; 356 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 357 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 358 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 359 360 ASSERT_WDEV_LOCK(wdev); 361 362 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 363 return; 364 365 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 366 wdev->conn->auto_auth && 367 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 368 /* select automatically between only open, shared, leap */ 369 switch (wdev->conn->params.auth_type) { 370 case NL80211_AUTHTYPE_OPEN_SYSTEM: 371 if (wdev->connect_keys) 372 wdev->conn->params.auth_type = 373 NL80211_AUTHTYPE_SHARED_KEY; 374 else 375 wdev->conn->params.auth_type = 376 NL80211_AUTHTYPE_NETWORK_EAP; 377 break; 378 case NL80211_AUTHTYPE_SHARED_KEY: 379 wdev->conn->params.auth_type = 380 NL80211_AUTHTYPE_NETWORK_EAP; 381 break; 382 default: 383 /* huh? */ 384 wdev->conn->params.auth_type = 385 NL80211_AUTHTYPE_OPEN_SYSTEM; 386 break; 387 } 388 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 389 schedule_work(&rdev->conn_work); 390 } else if (status_code != WLAN_STATUS_SUCCESS) { 391 struct cfg80211_connect_resp_params cr; 392 393 memset(&cr, 0, sizeof(cr)); 394 cr.status = status_code; 395 cr.links[0].bssid = mgmt->bssid; 396 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 397 __cfg80211_connect_result(wdev->netdev, &cr, false); 398 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 399 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 400 schedule_work(&rdev->conn_work); 401 } 402 } 403 404 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 405 { 406 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 407 408 if (!wdev->conn) 409 return false; 410 411 if (status == WLAN_STATUS_SUCCESS) { 412 wdev->conn->state = CFG80211_CONN_CONNECTED; 413 return false; 414 } 415 416 if (wdev->conn->prev_bssid_valid) { 417 /* 418 * Some stupid APs don't accept reassoc, so we 419 * need to fall back to trying regular assoc; 420 * return true so no event is sent to userspace. 421 */ 422 wdev->conn->prev_bssid_valid = false; 423 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 424 schedule_work(&rdev->conn_work); 425 return true; 426 } 427 428 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 429 schedule_work(&rdev->conn_work); 430 return false; 431 } 432 433 void cfg80211_sme_deauth(struct wireless_dev *wdev) 434 { 435 cfg80211_sme_free(wdev); 436 } 437 438 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 439 { 440 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 441 442 if (!wdev->conn) 443 return; 444 445 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 446 schedule_work(&rdev->conn_work); 447 } 448 449 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 450 { 451 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 452 453 if (!wdev->conn) 454 return; 455 456 wdev->conn->state = CFG80211_CONN_DEAUTH; 457 schedule_work(&rdev->conn_work); 458 } 459 460 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 461 { 462 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 463 464 if (!wdev->conn) 465 return; 466 467 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; 468 schedule_work(&rdev->conn_work); 469 } 470 471 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) 472 { 473 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 474 475 if (!wdev->conn) 476 return; 477 478 wdev->conn->state = CFG80211_CONN_ABANDON; 479 schedule_work(&rdev->conn_work); 480 } 481 482 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev) 483 { 484 unsigned int link; 485 486 for_each_valid_link(wdev, link) { 487 if (!wdev->links[link].client.current_bss) 488 continue; 489 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 490 cfg80211_put_bss(wdev->wiphy, 491 &wdev->links[link].client.current_bss->pub); 492 wdev->links[link].client.current_bss = NULL; 493 } 494 } 495 496 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask) 497 { 498 unsigned int link; 499 500 for_each_valid_link(wdev, link) { 501 if (!wdev->links[link].client.current_bss || 502 !(link_mask & BIT(link))) 503 continue; 504 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 505 cfg80211_put_bss(wdev->wiphy, 506 &wdev->links[link].client.current_bss->pub); 507 wdev->links[link].client.current_bss = NULL; 508 } 509 } 510 511 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 512 const u8 *ies, size_t ies_len, 513 const u8 **out_ies, size_t *out_ies_len) 514 { 515 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 516 u8 *buf; 517 size_t offs; 518 519 if (!rdev->wiphy.extended_capabilities_len || 520 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 521 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 522 if (!*out_ies) 523 return -ENOMEM; 524 *out_ies_len = ies_len; 525 return 0; 526 } 527 528 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 529 GFP_KERNEL); 530 if (!buf) 531 return -ENOMEM; 532 533 if (ies_len) { 534 static const u8 before_extcapa[] = { 535 /* not listing IEs expected to be created by driver */ 536 WLAN_EID_RSN, 537 WLAN_EID_QOS_CAPA, 538 WLAN_EID_RRM_ENABLED_CAPABILITIES, 539 WLAN_EID_MOBILITY_DOMAIN, 540 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 541 WLAN_EID_BSS_COEX_2040, 542 }; 543 544 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 545 ARRAY_SIZE(before_extcapa), 0); 546 memcpy(buf, ies, offs); 547 /* leave a whole for extended capabilities IE */ 548 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 549 ies + offs, ies_len - offs); 550 } else { 551 offs = 0; 552 } 553 554 /* place extended capabilities IE (with only driver capabilities) */ 555 buf[offs] = WLAN_EID_EXT_CAPABILITY; 556 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 557 memcpy(buf + offs + 2, 558 rdev->wiphy.extended_capabilities, 559 rdev->wiphy.extended_capabilities_len); 560 561 *out_ies = buf; 562 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 563 564 return 0; 565 } 566 567 static int cfg80211_sme_connect(struct wireless_dev *wdev, 568 struct cfg80211_connect_params *connect, 569 const u8 *prev_bssid) 570 { 571 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 572 struct cfg80211_bss *bss; 573 int err; 574 575 if (!rdev->ops->auth || !rdev->ops->assoc) 576 return -EOPNOTSUPP; 577 578 cfg80211_wdev_release_bsses(wdev); 579 580 if (wdev->connected) { 581 cfg80211_sme_free(wdev); 582 wdev->connected = false; 583 } 584 585 if (wdev->conn) 586 return -EINPROGRESS; 587 588 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 589 if (!wdev->conn) 590 return -ENOMEM; 591 592 /* 593 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 594 */ 595 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 596 if (connect->bssid) { 597 wdev->conn->params.bssid = wdev->conn->bssid; 598 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 599 } 600 601 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 602 &wdev->conn->ie, 603 &wdev->conn->params.ie_len)) { 604 kfree(wdev->conn); 605 wdev->conn = NULL; 606 return -ENOMEM; 607 } 608 wdev->conn->params.ie = wdev->conn->ie; 609 610 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 611 wdev->conn->auto_auth = true; 612 /* start with open system ... should mostly work */ 613 wdev->conn->params.auth_type = 614 NL80211_AUTHTYPE_OPEN_SYSTEM; 615 } else { 616 wdev->conn->auto_auth = false; 617 } 618 619 wdev->conn->params.ssid = wdev->u.client.ssid; 620 wdev->conn->params.ssid_len = wdev->u.client.ssid_len; 621 622 /* see if we have the bss already */ 623 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 624 wdev->conn->params.bssid, 625 wdev->conn->params.ssid, 626 wdev->conn->params.ssid_len, 627 wdev->conn_bss_type, 628 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 629 630 if (prev_bssid) { 631 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 632 wdev->conn->prev_bssid_valid = true; 633 } 634 635 /* we're good if we have a matching bss struct */ 636 if (bss) { 637 enum nl80211_timeout_reason treason; 638 639 cfg80211_step_auth_next(wdev->conn, bss); 640 err = cfg80211_conn_do_work(wdev, &treason); 641 cfg80211_put_bss(wdev->wiphy, bss); 642 } else { 643 /* otherwise we'll need to scan for the AP first */ 644 err = cfg80211_conn_scan(wdev); 645 646 /* 647 * If we can't scan right now, then we need to scan again 648 * after the current scan finished, since the parameters 649 * changed (unless we find a good AP anyway). 650 */ 651 if (err == -EBUSY) { 652 err = 0; 653 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 654 } 655 } 656 657 if (err) 658 cfg80211_sme_free(wdev); 659 660 return err; 661 } 662 663 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 664 { 665 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 666 int err; 667 668 if (!wdev->conn) 669 return 0; 670 671 if (!rdev->ops->deauth) 672 return -EOPNOTSUPP; 673 674 if (wdev->conn->state == CFG80211_CONN_SCANNING || 675 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 676 err = 0; 677 goto out; 678 } 679 680 /* wdev->conn->params.bssid must be set if > SCANNING */ 681 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 682 wdev->conn->params.bssid, 683 NULL, 0, reason, false); 684 out: 685 cfg80211_sme_free(wdev); 686 return err; 687 } 688 689 /* 690 * code shared for in-device and software SME 691 */ 692 693 static bool cfg80211_is_all_idle(void) 694 { 695 struct cfg80211_registered_device *rdev; 696 struct wireless_dev *wdev; 697 bool is_all_idle = true; 698 699 /* 700 * All devices must be idle as otherwise if you are actively 701 * scanning some new beacon hints could be learned and would 702 * count as new regulatory hints. 703 * Also if there is any other active beaconing interface we 704 * need not issue a disconnect hint and reset any info such 705 * as chan dfs state, etc. 706 */ 707 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 708 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 709 wdev_lock(wdev); 710 if (wdev->conn || wdev->connected || 711 cfg80211_beaconing_iface_active(wdev)) 712 is_all_idle = false; 713 wdev_unlock(wdev); 714 } 715 } 716 717 return is_all_idle; 718 } 719 720 static void disconnect_work(struct work_struct *work) 721 { 722 rtnl_lock(); 723 if (cfg80211_is_all_idle()) 724 regulatory_hint_disconnect(); 725 rtnl_unlock(); 726 } 727 728 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 729 730 static void 731 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev, 732 struct cfg80211_connect_resp_params *cr) 733 { 734 unsigned int link; 735 736 for_each_valid_link(cr, link) { 737 if (!cr->links[link].bss) 738 continue; 739 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 740 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 741 } 742 } 743 744 /* 745 * API calls for drivers implementing connect/disconnect and 746 * SME event handling 747 */ 748 749 /* This method must consume bss one way or another */ 750 void __cfg80211_connect_result(struct net_device *dev, 751 struct cfg80211_connect_resp_params *cr, 752 bool wextev) 753 { 754 struct wireless_dev *wdev = dev->ieee80211_ptr; 755 const struct element *country_elem = NULL; 756 const struct element *ssid; 757 const u8 *country_data; 758 u8 country_datalen; 759 #ifdef CONFIG_CFG80211_WEXT 760 union iwreq_data wrqu; 761 #endif 762 unsigned int link; 763 const u8 *connected_addr; 764 bool bss_not_found = false; 765 766 ASSERT_WDEV_LOCK(wdev); 767 768 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 769 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 770 goto out; 771 772 if (cr->valid_links) { 773 if (WARN_ON(!cr->ap_mld_addr)) 774 goto out; 775 776 for_each_valid_link(cr, link) { 777 if (WARN_ON(!cr->links[link].addr)) 778 goto out; 779 } 780 781 if (WARN_ON(wdev->connect_keys)) 782 goto out; 783 } 784 785 wdev->unprot_beacon_reported = 0; 786 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 787 GFP_KERNEL); 788 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid; 789 790 #ifdef CONFIG_CFG80211_WEXT 791 if (wextev && !cr->valid_links) { 792 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 793 memset(&wrqu, 0, sizeof(wrqu)); 794 wrqu.data.length = cr->req_ie_len; 795 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 796 cr->req_ie); 797 } 798 799 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 800 memset(&wrqu, 0, sizeof(wrqu)); 801 wrqu.data.length = cr->resp_ie_len; 802 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 803 cr->resp_ie); 804 } 805 806 memset(&wrqu, 0, sizeof(wrqu)); 807 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 808 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) { 809 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 810 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 811 wdev->wext.prev_bssid_valid = true; 812 } 813 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 814 } 815 #endif 816 817 if (cr->status == WLAN_STATUS_SUCCESS) { 818 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) { 819 for_each_valid_link(cr, link) { 820 if (WARN_ON_ONCE(!cr->links[link].bss)) 821 break; 822 } 823 } 824 825 for_each_valid_link(cr, link) { 826 /* don't do extra lookups for failures */ 827 if (cr->links[link].status != WLAN_STATUS_SUCCESS) 828 continue; 829 830 if (cr->links[link].bss) 831 continue; 832 833 cr->links[link].bss = 834 cfg80211_get_bss(wdev->wiphy, NULL, 835 cr->links[link].bssid, 836 wdev->u.client.ssid, 837 wdev->u.client.ssid_len, 838 wdev->conn_bss_type, 839 IEEE80211_PRIVACY_ANY); 840 if (!cr->links[link].bss) { 841 bss_not_found = true; 842 break; 843 } 844 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss)); 845 } 846 } 847 848 cfg80211_wdev_release_bsses(wdev); 849 850 if (cr->status != WLAN_STATUS_SUCCESS) { 851 kfree_sensitive(wdev->connect_keys); 852 wdev->connect_keys = NULL; 853 wdev->u.client.ssid_len = 0; 854 wdev->conn_owner_nlportid = 0; 855 cfg80211_connect_result_release_bsses(wdev, cr); 856 cfg80211_sme_free(wdev); 857 return; 858 } 859 860 if (WARN_ON(bss_not_found)) { 861 cfg80211_connect_result_release_bsses(wdev, cr); 862 return; 863 } 864 865 memset(wdev->links, 0, sizeof(wdev->links)); 866 for_each_valid_link(cr, link) { 867 if (cr->links[link].status == WLAN_STATUS_SUCCESS) 868 continue; 869 cr->valid_links &= ~BIT(link); 870 /* don't require bss pointer for failed links */ 871 if (!cr->links[link].bss) 872 continue; 873 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 874 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 875 } 876 wdev->valid_links = cr->valid_links; 877 for_each_valid_link(cr, link) 878 wdev->links[link].client.current_bss = 879 bss_from_pub(cr->links[link].bss); 880 wdev->connected = true; 881 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 882 if (cr->valid_links) { 883 for_each_valid_link(cr, link) 884 memcpy(wdev->links[link].addr, cr->links[link].addr, 885 ETH_ALEN); 886 } 887 888 cfg80211_upload_connect_keys(wdev); 889 890 rcu_read_lock(); 891 for_each_valid_link(cr, link) { 892 country_elem = 893 ieee80211_bss_get_elem(cr->links[link].bss, 894 WLAN_EID_COUNTRY); 895 if (country_elem) 896 break; 897 } 898 if (!country_elem) { 899 rcu_read_unlock(); 900 return; 901 } 902 903 country_datalen = country_elem->datalen; 904 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 905 rcu_read_unlock(); 906 907 if (!country_data) 908 return; 909 910 regulatory_hint_country_ie(wdev->wiphy, 911 cr->links[link].bss->channel->band, 912 country_data, country_datalen); 913 kfree(country_data); 914 915 if (!wdev->u.client.ssid_len) { 916 rcu_read_lock(); 917 for_each_valid_link(cr, link) { 918 ssid = ieee80211_bss_get_elem(cr->links[link].bss, 919 WLAN_EID_SSID); 920 921 if (!ssid || !ssid->datalen) 922 continue; 923 924 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen); 925 wdev->u.client.ssid_len = ssid->datalen; 926 break; 927 } 928 rcu_read_unlock(); 929 } 930 931 return; 932 out: 933 for_each_valid_link(cr, link) 934 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 935 } 936 937 static void cfg80211_update_link_bss(struct wireless_dev *wdev, 938 struct cfg80211_bss **bss) 939 { 940 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 941 struct cfg80211_internal_bss *ibss; 942 943 if (!*bss) 944 return; 945 946 ibss = bss_from_pub(*bss); 947 if (list_empty(&ibss->list)) { 948 struct cfg80211_bss *found = NULL, *tmp = *bss; 949 950 found = cfg80211_get_bss(wdev->wiphy, NULL, 951 (*bss)->bssid, 952 wdev->u.client.ssid, 953 wdev->u.client.ssid_len, 954 wdev->conn_bss_type, 955 IEEE80211_PRIVACY_ANY); 956 if (found) { 957 /* The same BSS is already updated so use it 958 * instead, as it has latest info. 959 */ 960 *bss = found; 961 } else { 962 /* Update with BSS provided by driver, it will 963 * be freshly added and ref cnted, we can free 964 * the old one. 965 * 966 * signal_valid can be false, as we are not 967 * expecting the BSS to be found. 968 * 969 * keep the old timestamp to avoid confusion 970 */ 971 cfg80211_bss_update(rdev, ibss, false, 972 ibss->ts); 973 } 974 975 cfg80211_put_bss(wdev->wiphy, tmp); 976 } 977 } 978 979 /* Consumes bss object(s) one way or another */ 980 void cfg80211_connect_done(struct net_device *dev, 981 struct cfg80211_connect_resp_params *params, 982 gfp_t gfp) 983 { 984 struct wireless_dev *wdev = dev->ieee80211_ptr; 985 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 986 struct cfg80211_event *ev; 987 unsigned long flags; 988 u8 *next; 989 size_t link_info_size = 0; 990 unsigned int link; 991 992 for_each_valid_link(params, link) { 993 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss); 994 link_info_size += params->links[link].bssid ? ETH_ALEN : 0; 995 link_info_size += params->links[link].addr ? ETH_ALEN : 0; 996 } 997 998 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) + 999 params->req_ie_len + params->resp_ie_len + 1000 params->fils.kek_len + params->fils.pmk_len + 1001 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size, 1002 gfp); 1003 1004 if (!ev) { 1005 for_each_valid_link(params, link) 1006 cfg80211_put_bss(wdev->wiphy, 1007 params->links[link].bss); 1008 return; 1009 } 1010 1011 ev->type = EVENT_CONNECT_RESULT; 1012 next = ((u8 *)ev) + sizeof(*ev); 1013 if (params->ap_mld_addr) { 1014 ev->cr.ap_mld_addr = next; 1015 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr, 1016 ETH_ALEN); 1017 next += ETH_ALEN; 1018 } 1019 if (params->req_ie_len) { 1020 ev->cr.req_ie = next; 1021 ev->cr.req_ie_len = params->req_ie_len; 1022 memcpy((void *)ev->cr.req_ie, params->req_ie, 1023 params->req_ie_len); 1024 next += params->req_ie_len; 1025 } 1026 if (params->resp_ie_len) { 1027 ev->cr.resp_ie = next; 1028 ev->cr.resp_ie_len = params->resp_ie_len; 1029 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 1030 params->resp_ie_len); 1031 next += params->resp_ie_len; 1032 } 1033 if (params->fils.kek_len) { 1034 ev->cr.fils.kek = next; 1035 ev->cr.fils.kek_len = params->fils.kek_len; 1036 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 1037 params->fils.kek_len); 1038 next += params->fils.kek_len; 1039 } 1040 if (params->fils.pmk_len) { 1041 ev->cr.fils.pmk = next; 1042 ev->cr.fils.pmk_len = params->fils.pmk_len; 1043 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 1044 params->fils.pmk_len); 1045 next += params->fils.pmk_len; 1046 } 1047 if (params->fils.pmkid) { 1048 ev->cr.fils.pmkid = next; 1049 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 1050 WLAN_PMKID_LEN); 1051 next += WLAN_PMKID_LEN; 1052 } 1053 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 1054 if (params->fils.update_erp_next_seq_num) 1055 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 1056 ev->cr.valid_links = params->valid_links; 1057 for_each_valid_link(params, link) { 1058 if (params->links[link].bss) 1059 cfg80211_hold_bss( 1060 bss_from_pub(params->links[link].bss)); 1061 ev->cr.links[link].bss = params->links[link].bss; 1062 ev->cr.links[link].status = params->links[link].status; 1063 1064 if (params->links[link].addr) { 1065 ev->cr.links[link].addr = next; 1066 memcpy((void *)ev->cr.links[link].addr, 1067 params->links[link].addr, 1068 ETH_ALEN); 1069 next += ETH_ALEN; 1070 } 1071 if (params->links[link].bssid) { 1072 ev->cr.links[link].bssid = next; 1073 memcpy((void *)ev->cr.links[link].bssid, 1074 params->links[link].bssid, 1075 ETH_ALEN); 1076 next += ETH_ALEN; 1077 } 1078 } 1079 ev->cr.status = params->status; 1080 ev->cr.timeout_reason = params->timeout_reason; 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 } 1087 EXPORT_SYMBOL(cfg80211_connect_done); 1088 1089 /* Consumes bss object one way or another */ 1090 void __cfg80211_roamed(struct wireless_dev *wdev, 1091 struct cfg80211_roam_info *info) 1092 { 1093 #ifdef CONFIG_CFG80211_WEXT 1094 union iwreq_data wrqu; 1095 #endif 1096 unsigned int link; 1097 const u8 *connected_addr; 1098 1099 ASSERT_WDEV_LOCK(wdev); 1100 1101 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1102 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1103 goto out; 1104 1105 if (WARN_ON(!wdev->connected)) 1106 goto out; 1107 1108 if (info->valid_links) { 1109 if (WARN_ON(!info->ap_mld_addr)) 1110 goto out; 1111 1112 for_each_valid_link(info, link) { 1113 if (WARN_ON(!info->links[link].addr)) 1114 goto out; 1115 } 1116 } 1117 1118 cfg80211_wdev_release_bsses(wdev); 1119 1120 for_each_valid_link(info, link) { 1121 if (WARN_ON(!info->links[link].bss)) 1122 goto out; 1123 } 1124 1125 memset(wdev->links, 0, sizeof(wdev->links)); 1126 wdev->valid_links = info->valid_links; 1127 for_each_valid_link(info, link) { 1128 cfg80211_hold_bss(bss_from_pub(info->links[link].bss)); 1129 wdev->links[link].client.current_bss = 1130 bss_from_pub(info->links[link].bss); 1131 } 1132 1133 connected_addr = info->valid_links ? 1134 info->ap_mld_addr : 1135 info->links[0].bss->bssid; 1136 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 1137 if (info->valid_links) { 1138 for_each_valid_link(info, link) 1139 memcpy(wdev->links[link].addr, info->links[link].addr, 1140 ETH_ALEN); 1141 } 1142 wdev->unprot_beacon_reported = 0; 1143 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 1144 wdev->netdev, info, GFP_KERNEL); 1145 1146 #ifdef CONFIG_CFG80211_WEXT 1147 if (!info->valid_links) { 1148 if (info->req_ie) { 1149 memset(&wrqu, 0, sizeof(wrqu)); 1150 wrqu.data.length = info->req_ie_len; 1151 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 1152 &wrqu, info->req_ie); 1153 } 1154 1155 if (info->resp_ie) { 1156 memset(&wrqu, 0, sizeof(wrqu)); 1157 wrqu.data.length = info->resp_ie_len; 1158 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 1159 &wrqu, info->resp_ie); 1160 } 1161 1162 memset(&wrqu, 0, sizeof(wrqu)); 1163 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1164 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 1165 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 1166 wdev->wext.prev_bssid_valid = true; 1167 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 1168 } 1169 #endif 1170 1171 return; 1172 out: 1173 for_each_valid_link(info, link) 1174 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1175 } 1176 1177 /* Consumes info->links.bss object(s) one way or another */ 1178 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 1179 gfp_t gfp) 1180 { 1181 struct wireless_dev *wdev = dev->ieee80211_ptr; 1182 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1183 struct cfg80211_event *ev; 1184 unsigned long flags; 1185 u8 *next; 1186 unsigned int link; 1187 size_t link_info_size = 0; 1188 bool bss_not_found = false; 1189 1190 for_each_valid_link(info, link) { 1191 link_info_size += info->links[link].addr ? ETH_ALEN : 0; 1192 link_info_size += info->links[link].bssid ? ETH_ALEN : 0; 1193 1194 if (info->links[link].bss) 1195 continue; 1196 1197 info->links[link].bss = 1198 cfg80211_get_bss(wdev->wiphy, 1199 info->links[link].channel, 1200 info->links[link].bssid, 1201 wdev->u.client.ssid, 1202 wdev->u.client.ssid_len, 1203 wdev->conn_bss_type, 1204 IEEE80211_PRIVACY_ANY); 1205 1206 if (!info->links[link].bss) { 1207 bss_not_found = true; 1208 break; 1209 } 1210 } 1211 1212 if (WARN_ON(bss_not_found)) 1213 goto out; 1214 1215 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 1216 info->fils.kek_len + info->fils.pmk_len + 1217 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) + 1218 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp); 1219 if (!ev) 1220 goto out; 1221 1222 ev->type = EVENT_ROAMED; 1223 next = ((u8 *)ev) + sizeof(*ev); 1224 if (info->req_ie_len) { 1225 ev->rm.req_ie = next; 1226 ev->rm.req_ie_len = info->req_ie_len; 1227 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 1228 next += info->req_ie_len; 1229 } 1230 if (info->resp_ie_len) { 1231 ev->rm.resp_ie = next; 1232 ev->rm.resp_ie_len = info->resp_ie_len; 1233 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1234 info->resp_ie_len); 1235 next += info->resp_ie_len; 1236 } 1237 if (info->fils.kek_len) { 1238 ev->rm.fils.kek = next; 1239 ev->rm.fils.kek_len = info->fils.kek_len; 1240 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1241 info->fils.kek_len); 1242 next += info->fils.kek_len; 1243 } 1244 if (info->fils.pmk_len) { 1245 ev->rm.fils.pmk = next; 1246 ev->rm.fils.pmk_len = info->fils.pmk_len; 1247 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1248 info->fils.pmk_len); 1249 next += info->fils.pmk_len; 1250 } 1251 if (info->fils.pmkid) { 1252 ev->rm.fils.pmkid = next; 1253 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1254 WLAN_PMKID_LEN); 1255 next += WLAN_PMKID_LEN; 1256 } 1257 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1258 if (info->fils.update_erp_next_seq_num) 1259 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1260 if (info->ap_mld_addr) { 1261 ev->rm.ap_mld_addr = next; 1262 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr, 1263 ETH_ALEN); 1264 next += ETH_ALEN; 1265 } 1266 ev->rm.valid_links = info->valid_links; 1267 for_each_valid_link(info, link) { 1268 ev->rm.links[link].bss = info->links[link].bss; 1269 1270 if (info->links[link].addr) { 1271 ev->rm.links[link].addr = next; 1272 memcpy((void *)ev->rm.links[link].addr, 1273 info->links[link].addr, 1274 ETH_ALEN); 1275 next += ETH_ALEN; 1276 } 1277 1278 if (info->links[link].bssid) { 1279 ev->rm.links[link].bssid = next; 1280 memcpy((void *)ev->rm.links[link].bssid, 1281 info->links[link].bssid, 1282 ETH_ALEN); 1283 next += ETH_ALEN; 1284 } 1285 } 1286 1287 spin_lock_irqsave(&wdev->event_lock, flags); 1288 list_add_tail(&ev->list, &wdev->event_list); 1289 spin_unlock_irqrestore(&wdev->event_lock, flags); 1290 queue_work(cfg80211_wq, &rdev->event_work); 1291 1292 return; 1293 out: 1294 for_each_valid_link(info, link) 1295 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1296 1297 } 1298 EXPORT_SYMBOL(cfg80211_roamed); 1299 1300 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid, 1301 const u8 *td_bitmap, u8 td_bitmap_len) 1302 { 1303 ASSERT_WDEV_LOCK(wdev); 1304 1305 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1306 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1307 return; 1308 1309 if (WARN_ON(!wdev->connected) || 1310 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid))) 1311 return; 1312 1313 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1314 bssid, td_bitmap, td_bitmap_len); 1315 } 1316 1317 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1318 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp) 1319 { 1320 struct wireless_dev *wdev = dev->ieee80211_ptr; 1321 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1322 struct cfg80211_event *ev; 1323 unsigned long flags; 1324 1325 if (WARN_ON(!bssid)) 1326 return; 1327 1328 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp); 1329 if (!ev) 1330 return; 1331 1332 ev->type = EVENT_PORT_AUTHORIZED; 1333 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1334 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev); 1335 ev->pa.td_bitmap_len = td_bitmap_len; 1336 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len); 1337 1338 /* 1339 * Use the wdev event list so that if there are pending 1340 * connected/roamed events, they will be reported first. 1341 */ 1342 spin_lock_irqsave(&wdev->event_lock, flags); 1343 list_add_tail(&ev->list, &wdev->event_list); 1344 spin_unlock_irqrestore(&wdev->event_lock, flags); 1345 queue_work(cfg80211_wq, &rdev->event_work); 1346 } 1347 EXPORT_SYMBOL(cfg80211_port_authorized); 1348 1349 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1350 size_t ie_len, u16 reason, bool from_ap) 1351 { 1352 struct wireless_dev *wdev = dev->ieee80211_ptr; 1353 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1354 int i; 1355 #ifdef CONFIG_CFG80211_WEXT 1356 union iwreq_data wrqu; 1357 #endif 1358 1359 ASSERT_WDEV_LOCK(wdev); 1360 1361 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1362 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1363 return; 1364 1365 cfg80211_wdev_release_bsses(wdev); 1366 wdev->connected = false; 1367 wdev->u.client.ssid_len = 0; 1368 wdev->conn_owner_nlportid = 0; 1369 kfree_sensitive(wdev->connect_keys); 1370 wdev->connect_keys = NULL; 1371 1372 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1373 1374 /* stop critical protocol if supported */ 1375 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1376 rdev->crit_proto_nlportid = 0; 1377 rdev_crit_proto_stop(rdev, wdev); 1378 } 1379 1380 /* 1381 * Delete all the keys ... pairwise keys can't really 1382 * exist any more anyway, but default keys might. 1383 */ 1384 if (rdev->ops->del_key) { 1385 int max_key_idx = 5; 1386 1387 if (wiphy_ext_feature_isset( 1388 wdev->wiphy, 1389 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1390 wiphy_ext_feature_isset( 1391 wdev->wiphy, 1392 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1393 max_key_idx = 7; 1394 for (i = 0; i <= max_key_idx; i++) 1395 rdev_del_key(rdev, dev, -1, i, false, NULL); 1396 } 1397 1398 rdev_set_qos_map(rdev, dev, NULL); 1399 1400 #ifdef CONFIG_CFG80211_WEXT 1401 memset(&wrqu, 0, sizeof(wrqu)); 1402 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1403 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1404 wdev->wext.connect.ssid_len = 0; 1405 #endif 1406 1407 schedule_work(&cfg80211_disconnect_work); 1408 } 1409 1410 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1411 const u8 *ie, size_t ie_len, 1412 bool locally_generated, gfp_t gfp) 1413 { 1414 struct wireless_dev *wdev = dev->ieee80211_ptr; 1415 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1416 struct cfg80211_event *ev; 1417 unsigned long flags; 1418 1419 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1420 if (!ev) 1421 return; 1422 1423 ev->type = EVENT_DISCONNECTED; 1424 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1425 ev->dc.ie_len = ie_len; 1426 memcpy((void *)ev->dc.ie, ie, ie_len); 1427 ev->dc.reason = reason; 1428 ev->dc.locally_generated = locally_generated; 1429 1430 spin_lock_irqsave(&wdev->event_lock, flags); 1431 list_add_tail(&ev->list, &wdev->event_list); 1432 spin_unlock_irqrestore(&wdev->event_lock, flags); 1433 queue_work(cfg80211_wq, &rdev->event_work); 1434 } 1435 EXPORT_SYMBOL(cfg80211_disconnected); 1436 1437 /* 1438 * API calls for nl80211/wext compatibility code 1439 */ 1440 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1441 struct net_device *dev, 1442 struct cfg80211_connect_params *connect, 1443 struct cfg80211_cached_keys *connkeys, 1444 const u8 *prev_bssid) 1445 { 1446 struct wireless_dev *wdev = dev->ieee80211_ptr; 1447 int err; 1448 1449 ASSERT_WDEV_LOCK(wdev); 1450 1451 /* 1452 * If we have an ssid_len, we're trying to connect or are 1453 * already connected, so reject a new SSID unless it's the 1454 * same (which is the case for re-association.) 1455 */ 1456 if (wdev->u.client.ssid_len && 1457 (wdev->u.client.ssid_len != connect->ssid_len || 1458 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) 1459 return -EALREADY; 1460 1461 /* 1462 * If connected, reject (re-)association unless prev_bssid 1463 * matches the current BSSID. 1464 */ 1465 if (wdev->connected) { 1466 if (!prev_bssid) 1467 return -EALREADY; 1468 if (!ether_addr_equal(prev_bssid, 1469 wdev->u.client.connected_addr)) 1470 return -ENOTCONN; 1471 } 1472 1473 /* 1474 * Reject if we're in the process of connecting with WEP, 1475 * this case isn't very interesting and trying to handle 1476 * it would make the code much more complex. 1477 */ 1478 if (wdev->connect_keys) 1479 return -EINPROGRESS; 1480 1481 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1482 rdev->wiphy.ht_capa_mod_mask); 1483 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1484 rdev->wiphy.vht_capa_mod_mask); 1485 1486 if (connkeys && connkeys->def >= 0) { 1487 int idx; 1488 u32 cipher; 1489 1490 idx = connkeys->def; 1491 cipher = connkeys->params[idx].cipher; 1492 /* If given a WEP key we may need it for shared key auth */ 1493 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1494 cipher == WLAN_CIPHER_SUITE_WEP104) { 1495 connect->key_idx = idx; 1496 connect->key = connkeys->params[idx].key; 1497 connect->key_len = connkeys->params[idx].key_len; 1498 1499 /* 1500 * If ciphers are not set (e.g. when going through 1501 * iwconfig), we have to set them appropriately here. 1502 */ 1503 if (connect->crypto.cipher_group == 0) 1504 connect->crypto.cipher_group = cipher; 1505 1506 if (connect->crypto.n_ciphers_pairwise == 0) { 1507 connect->crypto.n_ciphers_pairwise = 1; 1508 connect->crypto.ciphers_pairwise[0] = cipher; 1509 } 1510 } 1511 } else { 1512 if (WARN_ON(connkeys)) 1513 return -EINVAL; 1514 1515 /* connect can point to wdev->wext.connect which 1516 * can hold key data from a previous connection 1517 */ 1518 connect->key = NULL; 1519 connect->key_len = 0; 1520 connect->key_idx = 0; 1521 } 1522 1523 wdev->connect_keys = connkeys; 1524 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); 1525 wdev->u.client.ssid_len = connect->ssid_len; 1526 1527 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1528 IEEE80211_BSS_TYPE_ESS; 1529 1530 if (!rdev->ops->connect) 1531 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1532 else 1533 err = rdev_connect(rdev, dev, connect); 1534 1535 if (err) { 1536 wdev->connect_keys = NULL; 1537 /* 1538 * This could be reassoc getting refused, don't clear 1539 * ssid_len in that case. 1540 */ 1541 if (!wdev->connected) 1542 wdev->u.client.ssid_len = 0; 1543 return err; 1544 } 1545 1546 return 0; 1547 } 1548 1549 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1550 struct net_device *dev, u16 reason, bool wextev) 1551 { 1552 struct wireless_dev *wdev = dev->ieee80211_ptr; 1553 int err = 0; 1554 1555 ASSERT_WDEV_LOCK(wdev); 1556 1557 kfree_sensitive(wdev->connect_keys); 1558 wdev->connect_keys = NULL; 1559 1560 wdev->conn_owner_nlportid = 0; 1561 1562 if (wdev->conn) 1563 err = cfg80211_sme_disconnect(wdev, reason); 1564 else if (!rdev->ops->disconnect) 1565 cfg80211_mlme_down(rdev, dev); 1566 else if (wdev->u.client.ssid_len) 1567 err = rdev_disconnect(rdev, dev, reason); 1568 1569 /* 1570 * Clear ssid_len unless we actually were fully connected, 1571 * in which case cfg80211_disconnected() will take care of 1572 * this later. 1573 */ 1574 if (!wdev->connected) 1575 wdev->u.client.ssid_len = 0; 1576 1577 return err; 1578 } 1579 1580 /* 1581 * Used to clean up after the connection / connection attempt owner socket 1582 * disconnects 1583 */ 1584 void cfg80211_autodisconnect_wk(struct work_struct *work) 1585 { 1586 struct wireless_dev *wdev = 1587 container_of(work, struct wireless_dev, disconnect_wk); 1588 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1589 1590 wiphy_lock(wdev->wiphy); 1591 wdev_lock(wdev); 1592 1593 if (wdev->conn_owner_nlportid) { 1594 switch (wdev->iftype) { 1595 case NL80211_IFTYPE_ADHOC: 1596 __cfg80211_leave_ibss(rdev, wdev->netdev, false); 1597 break; 1598 case NL80211_IFTYPE_AP: 1599 case NL80211_IFTYPE_P2P_GO: 1600 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false); 1601 break; 1602 case NL80211_IFTYPE_MESH_POINT: 1603 __cfg80211_leave_mesh(rdev, wdev->netdev); 1604 break; 1605 case NL80211_IFTYPE_STATION: 1606 case NL80211_IFTYPE_P2P_CLIENT: 1607 /* 1608 * Use disconnect_bssid if still connecting and 1609 * ops->disconnect not implemented. Otherwise we can 1610 * use cfg80211_disconnect. 1611 */ 1612 if (rdev->ops->disconnect || wdev->connected) 1613 cfg80211_disconnect(rdev, wdev->netdev, 1614 WLAN_REASON_DEAUTH_LEAVING, 1615 true); 1616 else 1617 cfg80211_mlme_deauth(rdev, wdev->netdev, 1618 wdev->disconnect_bssid, 1619 NULL, 0, 1620 WLAN_REASON_DEAUTH_LEAVING, 1621 false); 1622 break; 1623 default: 1624 break; 1625 } 1626 } 1627 1628 wdev_unlock(wdev); 1629 wiphy_unlock(wdev->wiphy); 1630 } 1631