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