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 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 static void cfg80211_step_auth_next(struct cfg80211_conn *conn, 289 struct cfg80211_bss *bss) 290 { 291 memcpy(conn->bssid, bss->bssid, ETH_ALEN); 292 conn->params.bssid = conn->bssid; 293 conn->params.channel = bss->channel; 294 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 295 } 296 297 /* Returned bss is reference counted and must be cleaned up appropriately. */ 298 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 299 { 300 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 301 struct cfg80211_bss *bss; 302 303 ASSERT_WDEV_LOCK(wdev); 304 305 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 306 wdev->conn->params.bssid, 307 wdev->conn->params.ssid, 308 wdev->conn->params.ssid_len, 309 wdev->conn_bss_type, 310 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 311 if (!bss) 312 return NULL; 313 314 cfg80211_step_auth_next(wdev->conn, bss); 315 schedule_work(&rdev->conn_work); 316 317 return bss; 318 } 319 320 static void __cfg80211_sme_scan_done(struct net_device *dev) 321 { 322 struct wireless_dev *wdev = dev->ieee80211_ptr; 323 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 324 struct cfg80211_bss *bss; 325 326 ASSERT_WDEV_LOCK(wdev); 327 328 if (!wdev->conn) 329 return; 330 331 if (wdev->conn->state != CFG80211_CONN_SCANNING && 332 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 333 return; 334 335 bss = cfg80211_get_conn_bss(wdev); 336 if (bss) 337 cfg80211_put_bss(&rdev->wiphy, bss); 338 else 339 schedule_work(&rdev->conn_work); 340 } 341 342 void cfg80211_sme_scan_done(struct net_device *dev) 343 { 344 struct wireless_dev *wdev = dev->ieee80211_ptr; 345 346 wdev_lock(wdev); 347 __cfg80211_sme_scan_done(dev); 348 wdev_unlock(wdev); 349 } 350 351 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 352 { 353 struct wiphy *wiphy = wdev->wiphy; 354 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 355 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 356 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 357 358 ASSERT_WDEV_LOCK(wdev); 359 360 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 361 return; 362 363 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 364 wdev->conn->auto_auth && 365 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 366 /* select automatically between only open, shared, leap */ 367 switch (wdev->conn->params.auth_type) { 368 case NL80211_AUTHTYPE_OPEN_SYSTEM: 369 if (wdev->connect_keys) 370 wdev->conn->params.auth_type = 371 NL80211_AUTHTYPE_SHARED_KEY; 372 else 373 wdev->conn->params.auth_type = 374 NL80211_AUTHTYPE_NETWORK_EAP; 375 break; 376 case NL80211_AUTHTYPE_SHARED_KEY: 377 wdev->conn->params.auth_type = 378 NL80211_AUTHTYPE_NETWORK_EAP; 379 break; 380 default: 381 /* huh? */ 382 wdev->conn->params.auth_type = 383 NL80211_AUTHTYPE_OPEN_SYSTEM; 384 break; 385 } 386 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 387 schedule_work(&rdev->conn_work); 388 } else if (status_code != WLAN_STATUS_SUCCESS) { 389 struct cfg80211_connect_resp_params cr; 390 391 memset(&cr, 0, sizeof(cr)); 392 cr.status = status_code; 393 cr.links[0].bssid = mgmt->bssid; 394 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 395 __cfg80211_connect_result(wdev->netdev, &cr, false); 396 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 397 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 398 schedule_work(&rdev->conn_work); 399 } 400 } 401 402 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 403 { 404 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 405 406 if (!wdev->conn) 407 return false; 408 409 if (status == WLAN_STATUS_SUCCESS) { 410 wdev->conn->state = CFG80211_CONN_CONNECTED; 411 return false; 412 } 413 414 if (wdev->conn->prev_bssid_valid) { 415 /* 416 * Some stupid APs don't accept reassoc, so we 417 * need to fall back to trying regular assoc; 418 * return true so no event is sent to userspace. 419 */ 420 wdev->conn->prev_bssid_valid = false; 421 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 422 schedule_work(&rdev->conn_work); 423 return true; 424 } 425 426 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 427 schedule_work(&rdev->conn_work); 428 return false; 429 } 430 431 void cfg80211_sme_deauth(struct wireless_dev *wdev) 432 { 433 cfg80211_sme_free(wdev); 434 } 435 436 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 437 { 438 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 439 440 if (!wdev->conn) 441 return; 442 443 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 444 schedule_work(&rdev->conn_work); 445 } 446 447 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 448 { 449 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 450 451 if (!wdev->conn) 452 return; 453 454 wdev->conn->state = CFG80211_CONN_DEAUTH; 455 schedule_work(&rdev->conn_work); 456 } 457 458 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 459 { 460 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 461 462 if (!wdev->conn) 463 return; 464 465 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; 466 schedule_work(&rdev->conn_work); 467 } 468 469 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) 470 { 471 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 472 473 if (!wdev->conn) 474 return; 475 476 wdev->conn->state = CFG80211_CONN_ABANDON; 477 schedule_work(&rdev->conn_work); 478 } 479 480 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev) 481 { 482 unsigned int link; 483 484 for_each_valid_link(wdev, link) { 485 if (!wdev->links[link].client.current_bss) 486 continue; 487 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 488 cfg80211_put_bss(wdev->wiphy, 489 &wdev->links[link].client.current_bss->pub); 490 wdev->links[link].client.current_bss = NULL; 491 } 492 } 493 494 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask) 495 { 496 unsigned int link; 497 498 for_each_valid_link(wdev, link) { 499 if (!wdev->links[link].client.current_bss || 500 !(link_mask & BIT(link))) 501 continue; 502 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 503 cfg80211_put_bss(wdev->wiphy, 504 &wdev->links[link].client.current_bss->pub); 505 wdev->links[link].client.current_bss = NULL; 506 } 507 } 508 509 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 510 const u8 *ies, size_t ies_len, 511 const u8 **out_ies, size_t *out_ies_len) 512 { 513 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 514 u8 *buf; 515 size_t offs; 516 517 if (!rdev->wiphy.extended_capabilities_len || 518 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 519 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 520 if (!*out_ies) 521 return -ENOMEM; 522 *out_ies_len = ies_len; 523 return 0; 524 } 525 526 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 527 GFP_KERNEL); 528 if (!buf) 529 return -ENOMEM; 530 531 if (ies_len) { 532 static const u8 before_extcapa[] = { 533 /* not listing IEs expected to be created by driver */ 534 WLAN_EID_RSN, 535 WLAN_EID_QOS_CAPA, 536 WLAN_EID_RRM_ENABLED_CAPABILITIES, 537 WLAN_EID_MOBILITY_DOMAIN, 538 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 539 WLAN_EID_BSS_COEX_2040, 540 }; 541 542 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 543 ARRAY_SIZE(before_extcapa), 0); 544 memcpy(buf, ies, offs); 545 /* leave a whole for extended capabilities IE */ 546 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 547 ies + offs, ies_len - offs); 548 } else { 549 offs = 0; 550 } 551 552 /* place extended capabilities IE (with only driver capabilities) */ 553 buf[offs] = WLAN_EID_EXT_CAPABILITY; 554 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 555 memcpy(buf + offs + 2, 556 rdev->wiphy.extended_capabilities, 557 rdev->wiphy.extended_capabilities_len); 558 559 *out_ies = buf; 560 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 561 562 return 0; 563 } 564 565 static int cfg80211_sme_connect(struct wireless_dev *wdev, 566 struct cfg80211_connect_params *connect, 567 const u8 *prev_bssid) 568 { 569 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 570 struct cfg80211_bss *bss; 571 int err; 572 573 if (!rdev->ops->auth || !rdev->ops->assoc) 574 return -EOPNOTSUPP; 575 576 cfg80211_wdev_release_bsses(wdev); 577 578 if (wdev->connected) { 579 cfg80211_sme_free(wdev); 580 wdev->connected = false; 581 } 582 583 if (wdev->conn) 584 return -EINPROGRESS; 585 586 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 587 if (!wdev->conn) 588 return -ENOMEM; 589 590 /* 591 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 592 */ 593 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 594 if (connect->bssid) { 595 wdev->conn->params.bssid = wdev->conn->bssid; 596 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 597 } 598 599 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 600 &wdev->conn->ie, 601 &wdev->conn->params.ie_len)) { 602 kfree(wdev->conn); 603 wdev->conn = NULL; 604 return -ENOMEM; 605 } 606 wdev->conn->params.ie = wdev->conn->ie; 607 608 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 609 wdev->conn->auto_auth = true; 610 /* start with open system ... should mostly work */ 611 wdev->conn->params.auth_type = 612 NL80211_AUTHTYPE_OPEN_SYSTEM; 613 } else { 614 wdev->conn->auto_auth = false; 615 } 616 617 wdev->conn->params.ssid = wdev->u.client.ssid; 618 wdev->conn->params.ssid_len = wdev->u.client.ssid_len; 619 620 /* see if we have the bss already */ 621 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 622 wdev->conn->params.bssid, 623 wdev->conn->params.ssid, 624 wdev->conn->params.ssid_len, 625 wdev->conn_bss_type, 626 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 627 628 if (prev_bssid) { 629 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 630 wdev->conn->prev_bssid_valid = true; 631 } 632 633 /* we're good if we have a matching bss struct */ 634 if (bss) { 635 enum nl80211_timeout_reason treason; 636 637 cfg80211_step_auth_next(wdev->conn, bss); 638 err = cfg80211_conn_do_work(wdev, &treason); 639 cfg80211_put_bss(wdev->wiphy, bss); 640 } else { 641 /* otherwise we'll need to scan for the AP first */ 642 err = cfg80211_conn_scan(wdev); 643 644 /* 645 * If we can't scan right now, then we need to scan again 646 * after the current scan finished, since the parameters 647 * changed (unless we find a good AP anyway). 648 */ 649 if (err == -EBUSY) { 650 err = 0; 651 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 652 } 653 } 654 655 if (err) 656 cfg80211_sme_free(wdev); 657 658 return err; 659 } 660 661 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 662 { 663 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 664 int err; 665 666 if (!wdev->conn) 667 return 0; 668 669 if (!rdev->ops->deauth) 670 return -EOPNOTSUPP; 671 672 if (wdev->conn->state == CFG80211_CONN_SCANNING || 673 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 674 err = 0; 675 goto out; 676 } 677 678 /* wdev->conn->params.bssid must be set if > SCANNING */ 679 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 680 wdev->conn->params.bssid, 681 NULL, 0, reason, false); 682 out: 683 cfg80211_sme_free(wdev); 684 return err; 685 } 686 687 /* 688 * code shared for in-device and software SME 689 */ 690 691 static bool cfg80211_is_all_idle(void) 692 { 693 struct cfg80211_registered_device *rdev; 694 struct wireless_dev *wdev; 695 bool is_all_idle = true; 696 697 /* 698 * All devices must be idle as otherwise if you are actively 699 * scanning some new beacon hints could be learned and would 700 * count as new regulatory hints. 701 * Also if there is any other active beaconing interface we 702 * need not issue a disconnect hint and reset any info such 703 * as chan dfs state, etc. 704 */ 705 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 706 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 707 wdev_lock(wdev); 708 if (wdev->conn || wdev->connected || 709 cfg80211_beaconing_iface_active(wdev)) 710 is_all_idle = false; 711 wdev_unlock(wdev); 712 } 713 } 714 715 return is_all_idle; 716 } 717 718 static void disconnect_work(struct work_struct *work) 719 { 720 rtnl_lock(); 721 if (cfg80211_is_all_idle()) 722 regulatory_hint_disconnect(); 723 rtnl_unlock(); 724 } 725 726 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 727 728 static void 729 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev, 730 struct cfg80211_connect_resp_params *cr) 731 { 732 unsigned int link; 733 734 for_each_valid_link(cr, link) { 735 if (!cr->links[link].bss) 736 continue; 737 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 738 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 739 } 740 } 741 742 /* 743 * API calls for drivers implementing connect/disconnect and 744 * SME event handling 745 */ 746 747 /* This method must consume bss one way or another */ 748 void __cfg80211_connect_result(struct net_device *dev, 749 struct cfg80211_connect_resp_params *cr, 750 bool wextev) 751 { 752 struct wireless_dev *wdev = dev->ieee80211_ptr; 753 const struct element *country_elem = NULL; 754 const struct element *ssid; 755 const u8 *country_data; 756 u8 country_datalen; 757 #ifdef CONFIG_CFG80211_WEXT 758 union iwreq_data wrqu; 759 #endif 760 unsigned int link; 761 const u8 *connected_addr; 762 bool bss_not_found = false; 763 764 ASSERT_WDEV_LOCK(wdev); 765 766 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 767 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 768 goto out; 769 770 if (cr->valid_links) { 771 if (WARN_ON(!cr->ap_mld_addr)) 772 goto out; 773 774 for_each_valid_link(cr, link) { 775 if (WARN_ON(!cr->links[link].addr)) 776 goto out; 777 } 778 779 if (WARN_ON(wdev->connect_keys)) 780 goto out; 781 } 782 783 wdev->unprot_beacon_reported = 0; 784 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 785 GFP_KERNEL); 786 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid; 787 788 #ifdef CONFIG_CFG80211_WEXT 789 if (wextev && !cr->valid_links) { 790 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 791 memset(&wrqu, 0, sizeof(wrqu)); 792 wrqu.data.length = cr->req_ie_len; 793 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 794 cr->req_ie); 795 } 796 797 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 798 memset(&wrqu, 0, sizeof(wrqu)); 799 wrqu.data.length = cr->resp_ie_len; 800 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 801 cr->resp_ie); 802 } 803 804 memset(&wrqu, 0, sizeof(wrqu)); 805 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 806 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) { 807 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 808 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 809 wdev->wext.prev_bssid_valid = true; 810 } 811 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 812 } 813 #endif 814 815 if (cr->status == WLAN_STATUS_SUCCESS) { 816 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) { 817 for_each_valid_link(cr, link) { 818 if (WARN_ON_ONCE(!cr->links[link].bss)) 819 break; 820 } 821 } 822 823 for_each_valid_link(cr, link) { 824 /* don't do extra lookups for failures */ 825 if (cr->links[link].status != WLAN_STATUS_SUCCESS) 826 continue; 827 828 if (cr->links[link].bss) 829 continue; 830 831 cr->links[link].bss = 832 cfg80211_get_bss(wdev->wiphy, NULL, 833 cr->links[link].bssid, 834 wdev->u.client.ssid, 835 wdev->u.client.ssid_len, 836 wdev->conn_bss_type, 837 IEEE80211_PRIVACY_ANY); 838 if (!cr->links[link].bss) { 839 bss_not_found = true; 840 break; 841 } 842 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss)); 843 } 844 } 845 846 cfg80211_wdev_release_bsses(wdev); 847 848 if (cr->status != WLAN_STATUS_SUCCESS) { 849 kfree_sensitive(wdev->connect_keys); 850 wdev->connect_keys = NULL; 851 wdev->u.client.ssid_len = 0; 852 wdev->conn_owner_nlportid = 0; 853 cfg80211_connect_result_release_bsses(wdev, cr); 854 cfg80211_sme_free(wdev); 855 return; 856 } 857 858 if (WARN_ON(bss_not_found)) { 859 cfg80211_connect_result_release_bsses(wdev, cr); 860 return; 861 } 862 863 memset(wdev->links, 0, sizeof(wdev->links)); 864 for_each_valid_link(cr, link) { 865 if (cr->links[link].status == WLAN_STATUS_SUCCESS) 866 continue; 867 cr->valid_links &= ~BIT(link); 868 /* don't require bss pointer for failed links */ 869 if (!cr->links[link].bss) 870 continue; 871 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 872 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 873 } 874 wdev->valid_links = cr->valid_links; 875 for_each_valid_link(cr, link) 876 wdev->links[link].client.current_bss = 877 bss_from_pub(cr->links[link].bss); 878 wdev->connected = true; 879 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 880 if (cr->valid_links) { 881 for_each_valid_link(cr, link) 882 memcpy(wdev->links[link].addr, cr->links[link].addr, 883 ETH_ALEN); 884 } 885 886 cfg80211_upload_connect_keys(wdev); 887 888 rcu_read_lock(); 889 for_each_valid_link(cr, link) { 890 country_elem = 891 ieee80211_bss_get_elem(cr->links[link].bss, 892 WLAN_EID_COUNTRY); 893 if (country_elem) 894 break; 895 } 896 if (!country_elem) { 897 rcu_read_unlock(); 898 return; 899 } 900 901 country_datalen = country_elem->datalen; 902 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 903 rcu_read_unlock(); 904 905 if (!country_data) 906 return; 907 908 regulatory_hint_country_ie(wdev->wiphy, 909 cr->links[link].bss->channel->band, 910 country_data, country_datalen); 911 kfree(country_data); 912 913 if (!wdev->u.client.ssid_len) { 914 rcu_read_lock(); 915 for_each_valid_link(cr, link) { 916 ssid = ieee80211_bss_get_elem(cr->links[link].bss, 917 WLAN_EID_SSID); 918 919 if (!ssid || !ssid->datalen) 920 continue; 921 922 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen); 923 wdev->u.client.ssid_len = ssid->datalen; 924 break; 925 } 926 rcu_read_unlock(); 927 } 928 929 return; 930 out: 931 for_each_valid_link(cr, link) 932 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 933 } 934 935 static void cfg80211_update_link_bss(struct wireless_dev *wdev, 936 struct cfg80211_bss **bss) 937 { 938 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 939 struct cfg80211_internal_bss *ibss; 940 941 if (!*bss) 942 return; 943 944 ibss = bss_from_pub(*bss); 945 if (list_empty(&ibss->list)) { 946 struct cfg80211_bss *found = NULL, *tmp = *bss; 947 948 found = cfg80211_get_bss(wdev->wiphy, NULL, 949 (*bss)->bssid, 950 wdev->u.client.ssid, 951 wdev->u.client.ssid_len, 952 wdev->conn_bss_type, 953 IEEE80211_PRIVACY_ANY); 954 if (found) { 955 /* The same BSS is already updated so use it 956 * instead, as it has latest info. 957 */ 958 *bss = found; 959 } else { 960 /* Update with BSS provided by driver, it will 961 * be freshly added and ref cnted, we can free 962 * the old one. 963 * 964 * signal_valid can be false, as we are not 965 * expecting the BSS to be found. 966 * 967 * keep the old timestamp to avoid confusion 968 */ 969 cfg80211_bss_update(rdev, ibss, false, 970 ibss->ts); 971 } 972 973 cfg80211_put_bss(wdev->wiphy, tmp); 974 } 975 } 976 977 /* Consumes bss object(s) one way or another */ 978 void cfg80211_connect_done(struct net_device *dev, 979 struct cfg80211_connect_resp_params *params, 980 gfp_t gfp) 981 { 982 struct wireless_dev *wdev = dev->ieee80211_ptr; 983 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 984 struct cfg80211_event *ev; 985 unsigned long flags; 986 u8 *next; 987 size_t link_info_size = 0; 988 unsigned int link; 989 990 for_each_valid_link(params, link) { 991 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss); 992 link_info_size += params->links[link].bssid ? ETH_ALEN : 0; 993 link_info_size += params->links[link].addr ? ETH_ALEN : 0; 994 } 995 996 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) + 997 params->req_ie_len + params->resp_ie_len + 998 params->fils.kek_len + params->fils.pmk_len + 999 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size, 1000 gfp); 1001 1002 if (!ev) { 1003 for_each_valid_link(params, link) 1004 cfg80211_put_bss(wdev->wiphy, 1005 params->links[link].bss); 1006 return; 1007 } 1008 1009 ev->type = EVENT_CONNECT_RESULT; 1010 next = ((u8 *)ev) + sizeof(*ev); 1011 if (params->ap_mld_addr) { 1012 ev->cr.ap_mld_addr = next; 1013 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr, 1014 ETH_ALEN); 1015 next += ETH_ALEN; 1016 } 1017 if (params->req_ie_len) { 1018 ev->cr.req_ie = next; 1019 ev->cr.req_ie_len = params->req_ie_len; 1020 memcpy((void *)ev->cr.req_ie, params->req_ie, 1021 params->req_ie_len); 1022 next += params->req_ie_len; 1023 } 1024 if (params->resp_ie_len) { 1025 ev->cr.resp_ie = next; 1026 ev->cr.resp_ie_len = params->resp_ie_len; 1027 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 1028 params->resp_ie_len); 1029 next += params->resp_ie_len; 1030 } 1031 if (params->fils.kek_len) { 1032 ev->cr.fils.kek = next; 1033 ev->cr.fils.kek_len = params->fils.kek_len; 1034 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 1035 params->fils.kek_len); 1036 next += params->fils.kek_len; 1037 } 1038 if (params->fils.pmk_len) { 1039 ev->cr.fils.pmk = next; 1040 ev->cr.fils.pmk_len = params->fils.pmk_len; 1041 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 1042 params->fils.pmk_len); 1043 next += params->fils.pmk_len; 1044 } 1045 if (params->fils.pmkid) { 1046 ev->cr.fils.pmkid = next; 1047 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 1048 WLAN_PMKID_LEN); 1049 next += WLAN_PMKID_LEN; 1050 } 1051 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 1052 if (params->fils.update_erp_next_seq_num) 1053 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 1054 ev->cr.valid_links = params->valid_links; 1055 for_each_valid_link(params, link) { 1056 if (params->links[link].bss) 1057 cfg80211_hold_bss( 1058 bss_from_pub(params->links[link].bss)); 1059 ev->cr.links[link].bss = params->links[link].bss; 1060 1061 if (params->links[link].addr) { 1062 ev->cr.links[link].addr = next; 1063 memcpy((void *)ev->cr.links[link].addr, 1064 params->links[link].addr, 1065 ETH_ALEN); 1066 next += ETH_ALEN; 1067 } 1068 if (params->links[link].bssid) { 1069 ev->cr.links[link].bssid = next; 1070 memcpy((void *)ev->cr.links[link].bssid, 1071 params->links[link].bssid, 1072 ETH_ALEN); 1073 next += ETH_ALEN; 1074 } 1075 } 1076 ev->cr.status = params->status; 1077 ev->cr.timeout_reason = params->timeout_reason; 1078 1079 spin_lock_irqsave(&wdev->event_lock, flags); 1080 list_add_tail(&ev->list, &wdev->event_list); 1081 spin_unlock_irqrestore(&wdev->event_lock, flags); 1082 queue_work(cfg80211_wq, &rdev->event_work); 1083 } 1084 EXPORT_SYMBOL(cfg80211_connect_done); 1085 1086 /* Consumes bss object one way or another */ 1087 void __cfg80211_roamed(struct wireless_dev *wdev, 1088 struct cfg80211_roam_info *info) 1089 { 1090 #ifdef CONFIG_CFG80211_WEXT 1091 union iwreq_data wrqu; 1092 #endif 1093 unsigned int link; 1094 const u8 *connected_addr; 1095 1096 ASSERT_WDEV_LOCK(wdev); 1097 1098 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1099 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1100 goto out; 1101 1102 if (WARN_ON(!wdev->connected)) 1103 goto out; 1104 1105 if (info->valid_links) { 1106 if (WARN_ON(!info->ap_mld_addr)) 1107 goto out; 1108 1109 for_each_valid_link(info, link) { 1110 if (WARN_ON(!info->links[link].addr)) 1111 goto out; 1112 } 1113 } 1114 1115 cfg80211_wdev_release_bsses(wdev); 1116 1117 for_each_valid_link(info, link) { 1118 if (WARN_ON(!info->links[link].bss)) 1119 goto out; 1120 } 1121 1122 memset(wdev->links, 0, sizeof(wdev->links)); 1123 wdev->valid_links = info->valid_links; 1124 for_each_valid_link(info, link) { 1125 cfg80211_hold_bss(bss_from_pub(info->links[link].bss)); 1126 wdev->links[link].client.current_bss = 1127 bss_from_pub(info->links[link].bss); 1128 } 1129 1130 connected_addr = info->valid_links ? 1131 info->ap_mld_addr : 1132 info->links[0].bss->bssid; 1133 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 1134 if (info->valid_links) { 1135 for_each_valid_link(info, link) 1136 memcpy(wdev->links[link].addr, info->links[link].addr, 1137 ETH_ALEN); 1138 } 1139 wdev->unprot_beacon_reported = 0; 1140 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 1141 wdev->netdev, info, GFP_KERNEL); 1142 1143 #ifdef CONFIG_CFG80211_WEXT 1144 if (!info->valid_links) { 1145 if (info->req_ie) { 1146 memset(&wrqu, 0, sizeof(wrqu)); 1147 wrqu.data.length = info->req_ie_len; 1148 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 1149 &wrqu, info->req_ie); 1150 } 1151 1152 if (info->resp_ie) { 1153 memset(&wrqu, 0, sizeof(wrqu)); 1154 wrqu.data.length = info->resp_ie_len; 1155 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 1156 &wrqu, info->resp_ie); 1157 } 1158 1159 memset(&wrqu, 0, sizeof(wrqu)); 1160 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1161 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 1162 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 1163 wdev->wext.prev_bssid_valid = true; 1164 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 1165 } 1166 #endif 1167 1168 return; 1169 out: 1170 for_each_valid_link(info, link) 1171 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1172 } 1173 1174 /* Consumes info->links.bss object(s) one way or another */ 1175 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 1176 gfp_t gfp) 1177 { 1178 struct wireless_dev *wdev = dev->ieee80211_ptr; 1179 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1180 struct cfg80211_event *ev; 1181 unsigned long flags; 1182 u8 *next; 1183 unsigned int link; 1184 size_t link_info_size = 0; 1185 bool bss_not_found = false; 1186 1187 for_each_valid_link(info, link) { 1188 link_info_size += info->links[link].addr ? ETH_ALEN : 0; 1189 link_info_size += info->links[link].bssid ? ETH_ALEN : 0; 1190 1191 if (info->links[link].bss) 1192 continue; 1193 1194 info->links[link].bss = 1195 cfg80211_get_bss(wdev->wiphy, 1196 info->links[link].channel, 1197 info->links[link].bssid, 1198 wdev->u.client.ssid, 1199 wdev->u.client.ssid_len, 1200 wdev->conn_bss_type, 1201 IEEE80211_PRIVACY_ANY); 1202 1203 if (!info->links[link].bss) { 1204 bss_not_found = true; 1205 break; 1206 } 1207 } 1208 1209 if (WARN_ON(bss_not_found)) 1210 goto out; 1211 1212 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 1213 info->fils.kek_len + info->fils.pmk_len + 1214 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) + 1215 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp); 1216 if (!ev) 1217 goto out; 1218 1219 ev->type = EVENT_ROAMED; 1220 next = ((u8 *)ev) + sizeof(*ev); 1221 if (info->req_ie_len) { 1222 ev->rm.req_ie = next; 1223 ev->rm.req_ie_len = info->req_ie_len; 1224 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 1225 next += info->req_ie_len; 1226 } 1227 if (info->resp_ie_len) { 1228 ev->rm.resp_ie = next; 1229 ev->rm.resp_ie_len = info->resp_ie_len; 1230 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1231 info->resp_ie_len); 1232 next += info->resp_ie_len; 1233 } 1234 if (info->fils.kek_len) { 1235 ev->rm.fils.kek = next; 1236 ev->rm.fils.kek_len = info->fils.kek_len; 1237 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1238 info->fils.kek_len); 1239 next += info->fils.kek_len; 1240 } 1241 if (info->fils.pmk_len) { 1242 ev->rm.fils.pmk = next; 1243 ev->rm.fils.pmk_len = info->fils.pmk_len; 1244 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1245 info->fils.pmk_len); 1246 next += info->fils.pmk_len; 1247 } 1248 if (info->fils.pmkid) { 1249 ev->rm.fils.pmkid = next; 1250 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1251 WLAN_PMKID_LEN); 1252 next += WLAN_PMKID_LEN; 1253 } 1254 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1255 if (info->fils.update_erp_next_seq_num) 1256 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1257 if (info->ap_mld_addr) { 1258 ev->rm.ap_mld_addr = next; 1259 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr, 1260 ETH_ALEN); 1261 next += ETH_ALEN; 1262 } 1263 ev->rm.valid_links = info->valid_links; 1264 for_each_valid_link(info, link) { 1265 ev->rm.links[link].bss = info->links[link].bss; 1266 1267 if (info->links[link].addr) { 1268 ev->rm.links[link].addr = next; 1269 memcpy((void *)ev->rm.links[link].addr, 1270 info->links[link].addr, 1271 ETH_ALEN); 1272 next += ETH_ALEN; 1273 } 1274 1275 if (info->links[link].bssid) { 1276 ev->rm.links[link].bssid = next; 1277 memcpy((void *)ev->rm.links[link].bssid, 1278 info->links[link].bssid, 1279 ETH_ALEN); 1280 next += ETH_ALEN; 1281 } 1282 } 1283 1284 spin_lock_irqsave(&wdev->event_lock, flags); 1285 list_add_tail(&ev->list, &wdev->event_list); 1286 spin_unlock_irqrestore(&wdev->event_lock, flags); 1287 queue_work(cfg80211_wq, &rdev->event_work); 1288 1289 return; 1290 out: 1291 for_each_valid_link(info, link) 1292 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1293 1294 } 1295 EXPORT_SYMBOL(cfg80211_roamed); 1296 1297 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid, 1298 const u8 *td_bitmap, u8 td_bitmap_len) 1299 { 1300 ASSERT_WDEV_LOCK(wdev); 1301 1302 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1303 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1304 return; 1305 1306 if (WARN_ON(!wdev->connected) || 1307 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid))) 1308 return; 1309 1310 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1311 bssid, td_bitmap, td_bitmap_len); 1312 } 1313 1314 void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, 1315 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp) 1316 { 1317 struct wireless_dev *wdev = dev->ieee80211_ptr; 1318 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1319 struct cfg80211_event *ev; 1320 unsigned long flags; 1321 1322 if (WARN_ON(!bssid)) 1323 return; 1324 1325 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp); 1326 if (!ev) 1327 return; 1328 1329 ev->type = EVENT_PORT_AUTHORIZED; 1330 memcpy(ev->pa.bssid, bssid, ETH_ALEN); 1331 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev); 1332 ev->pa.td_bitmap_len = td_bitmap_len; 1333 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len); 1334 1335 /* 1336 * Use the wdev event list so that if there are pending 1337 * connected/roamed events, they will be reported first. 1338 */ 1339 spin_lock_irqsave(&wdev->event_lock, flags); 1340 list_add_tail(&ev->list, &wdev->event_list); 1341 spin_unlock_irqrestore(&wdev->event_lock, flags); 1342 queue_work(cfg80211_wq, &rdev->event_work); 1343 } 1344 EXPORT_SYMBOL(cfg80211_port_authorized); 1345 1346 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1347 size_t ie_len, u16 reason, bool from_ap) 1348 { 1349 struct wireless_dev *wdev = dev->ieee80211_ptr; 1350 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1351 int i; 1352 #ifdef CONFIG_CFG80211_WEXT 1353 union iwreq_data wrqu; 1354 #endif 1355 1356 ASSERT_WDEV_LOCK(wdev); 1357 1358 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1359 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1360 return; 1361 1362 cfg80211_wdev_release_bsses(wdev); 1363 wdev->connected = false; 1364 wdev->u.client.ssid_len = 0; 1365 wdev->conn_owner_nlportid = 0; 1366 kfree_sensitive(wdev->connect_keys); 1367 wdev->connect_keys = NULL; 1368 1369 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1370 1371 /* stop critical protocol if supported */ 1372 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1373 rdev->crit_proto_nlportid = 0; 1374 rdev_crit_proto_stop(rdev, wdev); 1375 } 1376 1377 /* 1378 * Delete all the keys ... pairwise keys can't really 1379 * exist any more anyway, but default keys might. 1380 */ 1381 if (rdev->ops->del_key) { 1382 int max_key_idx = 5; 1383 1384 if (wiphy_ext_feature_isset( 1385 wdev->wiphy, 1386 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1387 wiphy_ext_feature_isset( 1388 wdev->wiphy, 1389 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1390 max_key_idx = 7; 1391 for (i = 0; i <= max_key_idx; i++) 1392 rdev_del_key(rdev, dev, -1, i, false, NULL); 1393 } 1394 1395 rdev_set_qos_map(rdev, dev, NULL); 1396 1397 #ifdef CONFIG_CFG80211_WEXT 1398 memset(&wrqu, 0, sizeof(wrqu)); 1399 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1400 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1401 wdev->wext.connect.ssid_len = 0; 1402 #endif 1403 1404 schedule_work(&cfg80211_disconnect_work); 1405 } 1406 1407 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1408 const u8 *ie, size_t ie_len, 1409 bool locally_generated, gfp_t gfp) 1410 { 1411 struct wireless_dev *wdev = dev->ieee80211_ptr; 1412 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1413 struct cfg80211_event *ev; 1414 unsigned long flags; 1415 1416 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1417 if (!ev) 1418 return; 1419 1420 ev->type = EVENT_DISCONNECTED; 1421 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1422 ev->dc.ie_len = ie_len; 1423 memcpy((void *)ev->dc.ie, ie, ie_len); 1424 ev->dc.reason = reason; 1425 ev->dc.locally_generated = locally_generated; 1426 1427 spin_lock_irqsave(&wdev->event_lock, flags); 1428 list_add_tail(&ev->list, &wdev->event_list); 1429 spin_unlock_irqrestore(&wdev->event_lock, flags); 1430 queue_work(cfg80211_wq, &rdev->event_work); 1431 } 1432 EXPORT_SYMBOL(cfg80211_disconnected); 1433 1434 /* 1435 * API calls for nl80211/wext compatibility code 1436 */ 1437 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1438 struct net_device *dev, 1439 struct cfg80211_connect_params *connect, 1440 struct cfg80211_cached_keys *connkeys, 1441 const u8 *prev_bssid) 1442 { 1443 struct wireless_dev *wdev = dev->ieee80211_ptr; 1444 int err; 1445 1446 ASSERT_WDEV_LOCK(wdev); 1447 1448 /* 1449 * If we have an ssid_len, we're trying to connect or are 1450 * already connected, so reject a new SSID unless it's the 1451 * same (which is the case for re-association.) 1452 */ 1453 if (wdev->u.client.ssid_len && 1454 (wdev->u.client.ssid_len != connect->ssid_len || 1455 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) 1456 return -EALREADY; 1457 1458 /* 1459 * If connected, reject (re-)association unless prev_bssid 1460 * matches the current BSSID. 1461 */ 1462 if (wdev->connected) { 1463 if (!prev_bssid) 1464 return -EALREADY; 1465 if (!ether_addr_equal(prev_bssid, 1466 wdev->u.client.connected_addr)) 1467 return -ENOTCONN; 1468 } 1469 1470 /* 1471 * Reject if we're in the process of connecting with WEP, 1472 * this case isn't very interesting and trying to handle 1473 * it would make the code much more complex. 1474 */ 1475 if (wdev->connect_keys) 1476 return -EINPROGRESS; 1477 1478 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1479 rdev->wiphy.ht_capa_mod_mask); 1480 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1481 rdev->wiphy.vht_capa_mod_mask); 1482 1483 if (connkeys && connkeys->def >= 0) { 1484 int idx; 1485 u32 cipher; 1486 1487 idx = connkeys->def; 1488 cipher = connkeys->params[idx].cipher; 1489 /* If given a WEP key we may need it for shared key auth */ 1490 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1491 cipher == WLAN_CIPHER_SUITE_WEP104) { 1492 connect->key_idx = idx; 1493 connect->key = connkeys->params[idx].key; 1494 connect->key_len = connkeys->params[idx].key_len; 1495 1496 /* 1497 * If ciphers are not set (e.g. when going through 1498 * iwconfig), we have to set them appropriately here. 1499 */ 1500 if (connect->crypto.cipher_group == 0) 1501 connect->crypto.cipher_group = cipher; 1502 1503 if (connect->crypto.n_ciphers_pairwise == 0) { 1504 connect->crypto.n_ciphers_pairwise = 1; 1505 connect->crypto.ciphers_pairwise[0] = cipher; 1506 } 1507 } 1508 } else { 1509 if (WARN_ON(connkeys)) 1510 return -EINVAL; 1511 1512 /* connect can point to wdev->wext.connect which 1513 * can hold key data from a previous connection 1514 */ 1515 connect->key = NULL; 1516 connect->key_len = 0; 1517 connect->key_idx = 0; 1518 } 1519 1520 wdev->connect_keys = connkeys; 1521 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); 1522 wdev->u.client.ssid_len = connect->ssid_len; 1523 1524 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1525 IEEE80211_BSS_TYPE_ESS; 1526 1527 if (!rdev->ops->connect) 1528 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1529 else 1530 err = rdev_connect(rdev, dev, connect); 1531 1532 if (err) { 1533 wdev->connect_keys = NULL; 1534 /* 1535 * This could be reassoc getting refused, don't clear 1536 * ssid_len in that case. 1537 */ 1538 if (!wdev->connected) 1539 wdev->u.client.ssid_len = 0; 1540 return err; 1541 } 1542 1543 return 0; 1544 } 1545 1546 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1547 struct net_device *dev, u16 reason, bool wextev) 1548 { 1549 struct wireless_dev *wdev = dev->ieee80211_ptr; 1550 int err = 0; 1551 1552 ASSERT_WDEV_LOCK(wdev); 1553 1554 kfree_sensitive(wdev->connect_keys); 1555 wdev->connect_keys = NULL; 1556 1557 wdev->conn_owner_nlportid = 0; 1558 1559 if (wdev->conn) 1560 err = cfg80211_sme_disconnect(wdev, reason); 1561 else if (!rdev->ops->disconnect) 1562 cfg80211_mlme_down(rdev, dev); 1563 else if (wdev->u.client.ssid_len) 1564 err = rdev_disconnect(rdev, dev, reason); 1565 1566 /* 1567 * Clear ssid_len unless we actually were fully connected, 1568 * in which case cfg80211_disconnected() will take care of 1569 * this later. 1570 */ 1571 if (!wdev->connected) 1572 wdev->u.client.ssid_len = 0; 1573 1574 return err; 1575 } 1576 1577 /* 1578 * Used to clean up after the connection / connection attempt owner socket 1579 * disconnects 1580 */ 1581 void cfg80211_autodisconnect_wk(struct work_struct *work) 1582 { 1583 struct wireless_dev *wdev = 1584 container_of(work, struct wireless_dev, disconnect_wk); 1585 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1586 1587 wiphy_lock(wdev->wiphy); 1588 wdev_lock(wdev); 1589 1590 if (wdev->conn_owner_nlportid) { 1591 switch (wdev->iftype) { 1592 case NL80211_IFTYPE_ADHOC: 1593 __cfg80211_leave_ibss(rdev, wdev->netdev, false); 1594 break; 1595 case NL80211_IFTYPE_AP: 1596 case NL80211_IFTYPE_P2P_GO: 1597 __cfg80211_stop_ap(rdev, wdev->netdev, -1, false); 1598 break; 1599 case NL80211_IFTYPE_MESH_POINT: 1600 __cfg80211_leave_mesh(rdev, wdev->netdev); 1601 break; 1602 case NL80211_IFTYPE_STATION: 1603 case NL80211_IFTYPE_P2P_CLIENT: 1604 /* 1605 * Use disconnect_bssid if still connecting and 1606 * ops->disconnect not implemented. Otherwise we can 1607 * use cfg80211_disconnect. 1608 */ 1609 if (rdev->ops->disconnect || wdev->connected) 1610 cfg80211_disconnect(rdev, wdev->netdev, 1611 WLAN_REASON_DEAUTH_LEAVING, 1612 true); 1613 else 1614 cfg80211_mlme_deauth(rdev, wdev->netdev, 1615 wdev->disconnect_bssid, 1616 NULL, 0, 1617 WLAN_REASON_DEAUTH_LEAVING, 1618 false); 1619 break; 1620 default: 1621 break; 1622 } 1623 } 1624 1625 wdev_unlock(wdev); 1626 wiphy_unlock(wdev->wiphy); 1627 } 1628