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, 2022-2024 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 lockdep_assert_wiphy(wdev->wiphy); 71 72 if (rdev->scan_req || rdev->scan_msg) 73 return -EBUSY; 74 75 if (wdev->conn->params.channel) 76 n_channels = 1; 77 else 78 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy); 79 80 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 81 sizeof(request->channels[0]) * n_channels, 82 GFP_KERNEL); 83 if (!request) 84 return -ENOMEM; 85 86 request->n_channels = n_channels; 87 if (wdev->conn->params.channel) { 88 enum nl80211_band band = wdev->conn->params.channel->band; 89 struct ieee80211_supported_band *sband = 90 wdev->wiphy->bands[band]; 91 92 if (!sband) { 93 kfree(request); 94 return -EINVAL; 95 } 96 request->channels[0] = wdev->conn->params.channel; 97 request->rates[band] = (1 << sband->n_bitrates) - 1; 98 } else { 99 int i = 0, j; 100 enum nl80211_band band; 101 struct ieee80211_supported_band *bands; 102 struct ieee80211_channel *channel; 103 104 for (band = 0; band < NUM_NL80211_BANDS; band++) { 105 bands = wdev->wiphy->bands[band]; 106 if (!bands) 107 continue; 108 for (j = 0; j < bands->n_channels; j++) { 109 channel = &bands->channels[j]; 110 if (channel->flags & IEEE80211_CHAN_DISABLED) 111 continue; 112 request->channels[i++] = channel; 113 } 114 request->rates[band] = (1 << bands->n_bitrates) - 1; 115 } 116 n_channels = i; 117 } 118 request->n_channels = n_channels; 119 request->ssids = (void *)request + 120 struct_size(request, channels, n_channels); 121 request->n_ssids = 1; 122 123 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 124 wdev->conn->params.ssid_len); 125 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 126 127 eth_broadcast_addr(request->bssid); 128 129 request->wdev = wdev; 130 request->wiphy = &rdev->wiphy; 131 request->scan_start = jiffies; 132 133 rdev->scan_req = request; 134 135 err = cfg80211_scan(rdev); 136 if (!err) { 137 wdev->conn->state = CFG80211_CONN_SCANNING; 138 nl80211_send_scan_start(rdev, wdev); 139 dev_hold(wdev->netdev); 140 } else { 141 rdev->scan_req = NULL; 142 kfree(request); 143 } 144 return err; 145 } 146 147 static int cfg80211_conn_do_work(struct wireless_dev *wdev, 148 enum nl80211_timeout_reason *treason) 149 { 150 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 151 struct cfg80211_connect_params *params; 152 struct cfg80211_auth_request auth_req = {}; 153 struct cfg80211_assoc_request req = {}; 154 int err; 155 156 lockdep_assert_wiphy(wdev->wiphy); 157 158 if (!wdev->conn) 159 return 0; 160 161 params = &wdev->conn->params; 162 163 switch (wdev->conn->state) { 164 case CFG80211_CONN_SCANNING: 165 /* didn't find it during scan ... */ 166 return -ENOENT; 167 case CFG80211_CONN_SCAN_AGAIN: 168 return cfg80211_conn_scan(wdev); 169 case CFG80211_CONN_AUTHENTICATE_NEXT: 170 if (WARN_ON(!rdev->ops->auth)) 171 return -EOPNOTSUPP; 172 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 173 auth_req.key = params->key; 174 auth_req.key_len = params->key_len; 175 auth_req.key_idx = params->key_idx; 176 auth_req.auth_type = params->auth_type; 177 auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, 178 params->bssid, 179 params->ssid, params->ssid_len, 180 IEEE80211_BSS_TYPE_ESS, 181 IEEE80211_PRIVACY_ANY); 182 auth_req.link_id = -1; 183 err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req); 184 cfg80211_put_bss(&rdev->wiphy, auth_req.bss); 185 return err; 186 case CFG80211_CONN_AUTH_FAILED_TIMEOUT: 187 *treason = NL80211_TIMEOUT_AUTH; 188 return -ENOTCONN; 189 case CFG80211_CONN_ASSOCIATE_NEXT: 190 if (WARN_ON(!rdev->ops->assoc)) 191 return -EOPNOTSUPP; 192 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 193 if (wdev->conn->prev_bssid_valid) 194 req.prev_bssid = wdev->conn->prev_bssid; 195 req.ie = params->ie; 196 req.ie_len = params->ie_len; 197 req.use_mfp = params->mfp != NL80211_MFP_NO; 198 req.crypto = params->crypto; 199 req.flags = params->flags; 200 req.ht_capa = params->ht_capa; 201 req.ht_capa_mask = params->ht_capa_mask; 202 req.vht_capa = params->vht_capa; 203 req.vht_capa_mask = params->vht_capa_mask; 204 req.link_id = -1; 205 206 req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, 207 params->bssid, 208 params->ssid, params->ssid_len, 209 IEEE80211_BSS_TYPE_ESS, 210 IEEE80211_PRIVACY_ANY); 211 if (!req.bss) { 212 err = -ENOENT; 213 } else { 214 err = cfg80211_mlme_assoc(rdev, wdev->netdev, 215 &req, NULL); 216 cfg80211_put_bss(&rdev->wiphy, req.bss); 217 } 218 219 if (err) 220 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 221 NULL, 0, 222 WLAN_REASON_DEAUTH_LEAVING, 223 false); 224 return err; 225 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT: 226 *treason = NL80211_TIMEOUT_ASSOC; 227 fallthrough; 228 case CFG80211_CONN_ASSOC_FAILED: 229 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 230 NULL, 0, 231 WLAN_REASON_DEAUTH_LEAVING, false); 232 return -ENOTCONN; 233 case CFG80211_CONN_DEAUTH: 234 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 235 NULL, 0, 236 WLAN_REASON_DEAUTH_LEAVING, false); 237 fallthrough; 238 case CFG80211_CONN_ABANDON: 239 /* free directly, disconnected event already sent */ 240 cfg80211_sme_free(wdev); 241 return 0; 242 default: 243 return 0; 244 } 245 } 246 247 void cfg80211_conn_work(struct work_struct *work) 248 { 249 struct cfg80211_registered_device *rdev = 250 container_of(work, struct cfg80211_registered_device, conn_work); 251 struct wireless_dev *wdev; 252 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 253 enum nl80211_timeout_reason treason; 254 255 wiphy_lock(&rdev->wiphy); 256 257 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 258 if (!wdev->netdev) 259 continue; 260 261 if (!netif_running(wdev->netdev)) 262 continue; 263 264 if (!wdev->conn || 265 wdev->conn->state == CFG80211_CONN_CONNECTED) 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 } 283 284 wiphy_unlock(&rdev->wiphy); 285 } 286 287 static void cfg80211_step_auth_next(struct cfg80211_conn *conn, 288 struct cfg80211_bss *bss) 289 { 290 memcpy(conn->bssid, bss->bssid, ETH_ALEN); 291 conn->params.bssid = conn->bssid; 292 conn->params.channel = bss->channel; 293 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 294 } 295 296 /* Returned bss is reference counted and must be cleaned up appropriately. */ 297 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 298 { 299 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 300 struct cfg80211_bss *bss; 301 302 lockdep_assert_wiphy(wdev->wiphy); 303 304 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 305 wdev->conn->params.bssid, 306 wdev->conn->params.ssid, 307 wdev->conn->params.ssid_len, 308 wdev->conn_bss_type, 309 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 310 if (!bss) 311 return NULL; 312 313 cfg80211_step_auth_next(wdev->conn, bss); 314 schedule_work(&rdev->conn_work); 315 316 return bss; 317 } 318 319 void cfg80211_sme_scan_done(struct net_device *dev) 320 { 321 struct wireless_dev *wdev = dev->ieee80211_ptr; 322 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 323 struct cfg80211_bss *bss; 324 325 lockdep_assert_wiphy(wdev->wiphy); 326 327 if (!wdev->conn) 328 return; 329 330 if (wdev->conn->state != CFG80211_CONN_SCANNING && 331 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 332 return; 333 334 bss = cfg80211_get_conn_bss(wdev); 335 if (bss) 336 cfg80211_put_bss(&rdev->wiphy, bss); 337 else 338 schedule_work(&rdev->conn_work); 339 } 340 341 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 342 { 343 struct wiphy *wiphy = wdev->wiphy; 344 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 345 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 346 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 347 348 lockdep_assert_wiphy(wdev->wiphy); 349 350 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 351 return; 352 353 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 354 wdev->conn->auto_auth && 355 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 356 /* select automatically between only open, shared, leap */ 357 switch (wdev->conn->params.auth_type) { 358 case NL80211_AUTHTYPE_OPEN_SYSTEM: 359 if (wdev->connect_keys) 360 wdev->conn->params.auth_type = 361 NL80211_AUTHTYPE_SHARED_KEY; 362 else 363 wdev->conn->params.auth_type = 364 NL80211_AUTHTYPE_NETWORK_EAP; 365 break; 366 case NL80211_AUTHTYPE_SHARED_KEY: 367 wdev->conn->params.auth_type = 368 NL80211_AUTHTYPE_NETWORK_EAP; 369 break; 370 default: 371 /* huh? */ 372 wdev->conn->params.auth_type = 373 NL80211_AUTHTYPE_OPEN_SYSTEM; 374 break; 375 } 376 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 377 schedule_work(&rdev->conn_work); 378 } else if (status_code != WLAN_STATUS_SUCCESS) { 379 struct cfg80211_connect_resp_params cr; 380 381 memset(&cr, 0, sizeof(cr)); 382 cr.status = status_code; 383 cr.links[0].bssid = mgmt->bssid; 384 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 385 __cfg80211_connect_result(wdev->netdev, &cr, false); 386 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 387 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 388 schedule_work(&rdev->conn_work); 389 } 390 } 391 392 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 393 { 394 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 395 396 if (!wdev->conn) 397 return false; 398 399 if (status == WLAN_STATUS_SUCCESS) { 400 wdev->conn->state = CFG80211_CONN_CONNECTED; 401 return false; 402 } 403 404 if (wdev->conn->prev_bssid_valid) { 405 /* 406 * Some stupid APs don't accept reassoc, so we 407 * need to fall back to trying regular assoc; 408 * return true so no event is sent to userspace. 409 */ 410 wdev->conn->prev_bssid_valid = false; 411 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 412 schedule_work(&rdev->conn_work); 413 return true; 414 } 415 416 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 417 schedule_work(&rdev->conn_work); 418 return false; 419 } 420 421 void cfg80211_sme_deauth(struct wireless_dev *wdev) 422 { 423 cfg80211_sme_free(wdev); 424 } 425 426 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 427 { 428 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 429 430 if (!wdev->conn) 431 return; 432 433 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 434 schedule_work(&rdev->conn_work); 435 } 436 437 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 438 { 439 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 440 441 if (!wdev->conn) 442 return; 443 444 wdev->conn->state = CFG80211_CONN_DEAUTH; 445 schedule_work(&rdev->conn_work); 446 } 447 448 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 449 { 450 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 451 452 if (!wdev->conn) 453 return; 454 455 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; 456 schedule_work(&rdev->conn_work); 457 } 458 459 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) 460 { 461 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 462 463 if (!wdev->conn) 464 return; 465 466 wdev->conn->state = CFG80211_CONN_ABANDON; 467 schedule_work(&rdev->conn_work); 468 } 469 470 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev) 471 { 472 unsigned int link; 473 474 for_each_valid_link(wdev, link) { 475 if (!wdev->links[link].client.current_bss) 476 continue; 477 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 478 cfg80211_put_bss(wdev->wiphy, 479 &wdev->links[link].client.current_bss->pub); 480 wdev->links[link].client.current_bss = NULL; 481 } 482 } 483 484 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask) 485 { 486 unsigned int link; 487 488 for_each_valid_link(wdev, link) { 489 if (!wdev->links[link].client.current_bss || 490 !(link_mask & BIT(link))) 491 continue; 492 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 493 cfg80211_put_bss(wdev->wiphy, 494 &wdev->links[link].client.current_bss->pub); 495 wdev->links[link].client.current_bss = NULL; 496 } 497 } 498 499 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 500 const u8 *ies, size_t ies_len, 501 const u8 **out_ies, size_t *out_ies_len) 502 { 503 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 504 u8 *buf; 505 size_t offs; 506 507 if (!rdev->wiphy.extended_capabilities_len || 508 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 509 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 510 if (!*out_ies) 511 return -ENOMEM; 512 *out_ies_len = ies_len; 513 return 0; 514 } 515 516 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 517 GFP_KERNEL); 518 if (!buf) 519 return -ENOMEM; 520 521 if (ies_len) { 522 static const u8 before_extcapa[] = { 523 /* not listing IEs expected to be created by driver */ 524 WLAN_EID_RSN, 525 WLAN_EID_QOS_CAPA, 526 WLAN_EID_RRM_ENABLED_CAPABILITIES, 527 WLAN_EID_MOBILITY_DOMAIN, 528 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 529 WLAN_EID_BSS_COEX_2040, 530 }; 531 532 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 533 ARRAY_SIZE(before_extcapa), 0); 534 memcpy(buf, ies, offs); 535 /* leave a whole for extended capabilities IE */ 536 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 537 ies + offs, ies_len - offs); 538 } else { 539 offs = 0; 540 } 541 542 /* place extended capabilities IE (with only driver capabilities) */ 543 buf[offs] = WLAN_EID_EXT_CAPABILITY; 544 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 545 memcpy(buf + offs + 2, 546 rdev->wiphy.extended_capabilities, 547 rdev->wiphy.extended_capabilities_len); 548 549 *out_ies = buf; 550 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 551 552 return 0; 553 } 554 555 static int cfg80211_sme_connect(struct wireless_dev *wdev, 556 struct cfg80211_connect_params *connect, 557 const u8 *prev_bssid) 558 { 559 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 560 struct cfg80211_bss *bss; 561 int err; 562 563 if (!rdev->ops->auth || !rdev->ops->assoc) 564 return -EOPNOTSUPP; 565 566 cfg80211_wdev_release_bsses(wdev); 567 568 if (wdev->connected) { 569 cfg80211_sme_free(wdev); 570 wdev->connected = false; 571 } 572 573 if (wdev->conn) 574 return -EINPROGRESS; 575 576 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 577 if (!wdev->conn) 578 return -ENOMEM; 579 580 /* 581 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 582 */ 583 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 584 if (connect->bssid) { 585 wdev->conn->params.bssid = wdev->conn->bssid; 586 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 587 } 588 589 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 590 &wdev->conn->ie, 591 &wdev->conn->params.ie_len)) { 592 kfree(wdev->conn); 593 wdev->conn = NULL; 594 return -ENOMEM; 595 } 596 wdev->conn->params.ie = wdev->conn->ie; 597 598 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 599 wdev->conn->auto_auth = true; 600 /* start with open system ... should mostly work */ 601 wdev->conn->params.auth_type = 602 NL80211_AUTHTYPE_OPEN_SYSTEM; 603 } else { 604 wdev->conn->auto_auth = false; 605 } 606 607 wdev->conn->params.ssid = wdev->u.client.ssid; 608 wdev->conn->params.ssid_len = wdev->u.client.ssid_len; 609 610 /* see if we have the bss already */ 611 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 612 wdev->conn->params.bssid, 613 wdev->conn->params.ssid, 614 wdev->conn->params.ssid_len, 615 wdev->conn_bss_type, 616 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 617 618 if (prev_bssid) { 619 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 620 wdev->conn->prev_bssid_valid = true; 621 } 622 623 /* we're good if we have a matching bss struct */ 624 if (bss) { 625 enum nl80211_timeout_reason treason; 626 627 cfg80211_step_auth_next(wdev->conn, bss); 628 err = cfg80211_conn_do_work(wdev, &treason); 629 cfg80211_put_bss(wdev->wiphy, bss); 630 } else { 631 /* otherwise we'll need to scan for the AP first */ 632 err = cfg80211_conn_scan(wdev); 633 634 /* 635 * If we can't scan right now, then we need to scan again 636 * after the current scan finished, since the parameters 637 * changed (unless we find a good AP anyway). 638 */ 639 if (err == -EBUSY) { 640 err = 0; 641 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 642 } 643 } 644 645 if (err) 646 cfg80211_sme_free(wdev); 647 648 return err; 649 } 650 651 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 652 { 653 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 654 int err; 655 656 if (!wdev->conn) 657 return 0; 658 659 if (!rdev->ops->deauth) 660 return -EOPNOTSUPP; 661 662 if (wdev->conn->state == CFG80211_CONN_SCANNING || 663 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 664 err = 0; 665 goto out; 666 } 667 668 /* wdev->conn->params.bssid must be set if > SCANNING */ 669 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 670 wdev->conn->params.bssid, 671 NULL, 0, reason, false); 672 out: 673 cfg80211_sme_free(wdev); 674 return err; 675 } 676 677 /* 678 * code shared for in-device and software SME 679 */ 680 681 static bool cfg80211_is_all_idle(void) 682 { 683 struct cfg80211_registered_device *rdev; 684 struct wireless_dev *wdev; 685 bool is_all_idle = true; 686 687 /* 688 * All devices must be idle as otherwise if you are actively 689 * scanning some new beacon hints could be learned and would 690 * count as new regulatory hints. 691 * Also if there is any other active beaconing interface we 692 * need not issue a disconnect hint and reset any info such 693 * as chan dfs state, etc. 694 */ 695 for_each_rdev(rdev) { 696 wiphy_lock(&rdev->wiphy); 697 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 698 if (wdev->conn || wdev->connected || 699 cfg80211_beaconing_iface_active(wdev)) 700 is_all_idle = false; 701 } 702 wiphy_unlock(&rdev->wiphy); 703 } 704 705 return is_all_idle; 706 } 707 708 static void disconnect_work(struct work_struct *work) 709 { 710 rtnl_lock(); 711 if (cfg80211_is_all_idle()) 712 regulatory_hint_disconnect(); 713 rtnl_unlock(); 714 } 715 716 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 717 718 static void 719 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev, 720 struct cfg80211_connect_resp_params *cr) 721 { 722 unsigned int link; 723 724 for_each_valid_link(cr, link) { 725 if (!cr->links[link].bss) 726 continue; 727 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 728 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 729 } 730 } 731 732 /* 733 * API calls for drivers implementing connect/disconnect and 734 * SME event handling 735 */ 736 737 /* This method must consume bss one way or another */ 738 void __cfg80211_connect_result(struct net_device *dev, 739 struct cfg80211_connect_resp_params *cr, 740 bool wextev) 741 { 742 struct wireless_dev *wdev = dev->ieee80211_ptr; 743 const struct element *country_elem = NULL; 744 const struct element *ssid; 745 const u8 *country_data; 746 u8 country_datalen; 747 #ifdef CONFIG_CFG80211_WEXT 748 union iwreq_data wrqu; 749 #endif 750 unsigned int link; 751 const u8 *connected_addr; 752 bool bss_not_found = false; 753 754 lockdep_assert_wiphy(wdev->wiphy); 755 756 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 757 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 758 goto out; 759 760 if (cr->valid_links) { 761 if (WARN_ON(!cr->ap_mld_addr)) 762 goto out; 763 764 for_each_valid_link(cr, link) { 765 if (WARN_ON(!cr->links[link].addr)) 766 goto out; 767 } 768 769 if (WARN_ON(wdev->connect_keys)) 770 goto out; 771 } 772 773 wdev->unprot_beacon_reported = 0; 774 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 775 GFP_KERNEL); 776 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid; 777 778 #ifdef CONFIG_CFG80211_WEXT 779 if (wextev && !cr->valid_links) { 780 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 781 memset(&wrqu, 0, sizeof(wrqu)); 782 wrqu.data.length = cr->req_ie_len; 783 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 784 cr->req_ie); 785 } 786 787 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 788 memset(&wrqu, 0, sizeof(wrqu)); 789 wrqu.data.length = cr->resp_ie_len; 790 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 791 cr->resp_ie); 792 } 793 794 memset(&wrqu, 0, sizeof(wrqu)); 795 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 796 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) { 797 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 798 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 799 wdev->wext.prev_bssid_valid = true; 800 } 801 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 802 } 803 #endif 804 805 if (cr->status == WLAN_STATUS_SUCCESS) { 806 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) { 807 for_each_valid_link(cr, link) { 808 if (WARN_ON_ONCE(!cr->links[link].bss)) 809 break; 810 } 811 } 812 813 for_each_valid_link(cr, link) { 814 /* don't do extra lookups for failures */ 815 if (cr->links[link].status != WLAN_STATUS_SUCCESS) 816 continue; 817 818 if (cr->links[link].bss) 819 continue; 820 821 cr->links[link].bss = 822 cfg80211_get_bss(wdev->wiphy, NULL, 823 cr->links[link].bssid, 824 wdev->u.client.ssid, 825 wdev->u.client.ssid_len, 826 wdev->conn_bss_type, 827 IEEE80211_PRIVACY_ANY); 828 if (!cr->links[link].bss) { 829 bss_not_found = true; 830 break; 831 } 832 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss)); 833 } 834 } 835 836 cfg80211_wdev_release_bsses(wdev); 837 838 if (cr->status != WLAN_STATUS_SUCCESS) { 839 kfree_sensitive(wdev->connect_keys); 840 wdev->connect_keys = NULL; 841 wdev->u.client.ssid_len = 0; 842 wdev->conn_owner_nlportid = 0; 843 cfg80211_connect_result_release_bsses(wdev, cr); 844 cfg80211_sme_free(wdev); 845 return; 846 } 847 848 if (WARN_ON(bss_not_found)) { 849 cfg80211_connect_result_release_bsses(wdev, cr); 850 return; 851 } 852 853 memset(wdev->links, 0, sizeof(wdev->links)); 854 for_each_valid_link(cr, link) { 855 if (cr->links[link].status == WLAN_STATUS_SUCCESS) 856 continue; 857 cr->valid_links &= ~BIT(link); 858 /* don't require bss pointer for failed links */ 859 if (!cr->links[link].bss) 860 continue; 861 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 862 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 863 } 864 wdev->valid_links = cr->valid_links; 865 for_each_valid_link(cr, link) 866 wdev->links[link].client.current_bss = 867 bss_from_pub(cr->links[link].bss); 868 wdev->connected = true; 869 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 870 if (cr->valid_links) { 871 for_each_valid_link(cr, link) 872 memcpy(wdev->links[link].addr, cr->links[link].addr, 873 ETH_ALEN); 874 } 875 876 cfg80211_upload_connect_keys(wdev); 877 878 rcu_read_lock(); 879 for_each_valid_link(cr, link) { 880 country_elem = 881 ieee80211_bss_get_elem(cr->links[link].bss, 882 WLAN_EID_COUNTRY); 883 if (country_elem) 884 break; 885 } 886 if (!country_elem) { 887 rcu_read_unlock(); 888 return; 889 } 890 891 country_datalen = country_elem->datalen; 892 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 893 rcu_read_unlock(); 894 895 if (!country_data) 896 return; 897 898 regulatory_hint_country_ie(wdev->wiphy, 899 cr->links[link].bss->channel->band, 900 country_data, country_datalen); 901 kfree(country_data); 902 903 if (!wdev->u.client.ssid_len) { 904 rcu_read_lock(); 905 for_each_valid_link(cr, link) { 906 ssid = ieee80211_bss_get_elem(cr->links[link].bss, 907 WLAN_EID_SSID); 908 909 if (!ssid || !ssid->datalen) 910 continue; 911 912 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen); 913 wdev->u.client.ssid_len = ssid->datalen; 914 break; 915 } 916 rcu_read_unlock(); 917 } 918 919 return; 920 out: 921 for_each_valid_link(cr, link) 922 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 923 } 924 925 static void cfg80211_update_link_bss(struct wireless_dev *wdev, 926 struct cfg80211_bss **bss) 927 { 928 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 929 struct cfg80211_internal_bss *ibss; 930 931 if (!*bss) 932 return; 933 934 ibss = bss_from_pub(*bss); 935 if (list_empty(&ibss->list)) { 936 struct cfg80211_bss *found = NULL, *tmp = *bss; 937 938 found = cfg80211_get_bss(wdev->wiphy, NULL, 939 (*bss)->bssid, 940 wdev->u.client.ssid, 941 wdev->u.client.ssid_len, 942 wdev->conn_bss_type, 943 IEEE80211_PRIVACY_ANY); 944 if (found) { 945 /* The same BSS is already updated so use it 946 * instead, as it has latest info. 947 */ 948 *bss = found; 949 } else { 950 /* Update with BSS provided by driver, it will 951 * be freshly added and ref cnted, we can free 952 * the old one. 953 * 954 * signal_valid can be false, as we are not 955 * expecting the BSS to be found. 956 * 957 * keep the old timestamp to avoid confusion 958 */ 959 cfg80211_bss_update(rdev, ibss, false, 960 ibss->ts); 961 } 962 963 cfg80211_put_bss(wdev->wiphy, tmp); 964 } 965 } 966 967 /* Consumes bss object(s) one way or another */ 968 void cfg80211_connect_done(struct net_device *dev, 969 struct cfg80211_connect_resp_params *params, 970 gfp_t gfp) 971 { 972 struct wireless_dev *wdev = dev->ieee80211_ptr; 973 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 974 struct cfg80211_event *ev; 975 unsigned long flags; 976 u8 *next; 977 size_t link_info_size = 0; 978 unsigned int link; 979 980 for_each_valid_link(params, link) { 981 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss); 982 link_info_size += params->links[link].bssid ? ETH_ALEN : 0; 983 link_info_size += params->links[link].addr ? ETH_ALEN : 0; 984 } 985 986 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) + 987 params->req_ie_len + params->resp_ie_len + 988 params->fils.kek_len + params->fils.pmk_len + 989 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size, 990 gfp); 991 992 if (!ev) { 993 for_each_valid_link(params, link) 994 cfg80211_put_bss(wdev->wiphy, 995 params->links[link].bss); 996 return; 997 } 998 999 ev->type = EVENT_CONNECT_RESULT; 1000 next = ((u8 *)ev) + sizeof(*ev); 1001 if (params->ap_mld_addr) { 1002 ev->cr.ap_mld_addr = next; 1003 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr, 1004 ETH_ALEN); 1005 next += ETH_ALEN; 1006 } 1007 if (params->req_ie_len) { 1008 ev->cr.req_ie = next; 1009 ev->cr.req_ie_len = params->req_ie_len; 1010 memcpy((void *)ev->cr.req_ie, params->req_ie, 1011 params->req_ie_len); 1012 next += params->req_ie_len; 1013 } 1014 if (params->resp_ie_len) { 1015 ev->cr.resp_ie = next; 1016 ev->cr.resp_ie_len = params->resp_ie_len; 1017 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 1018 params->resp_ie_len); 1019 next += params->resp_ie_len; 1020 } 1021 if (params->fils.kek_len) { 1022 ev->cr.fils.kek = next; 1023 ev->cr.fils.kek_len = params->fils.kek_len; 1024 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 1025 params->fils.kek_len); 1026 next += params->fils.kek_len; 1027 } 1028 if (params->fils.pmk_len) { 1029 ev->cr.fils.pmk = next; 1030 ev->cr.fils.pmk_len = params->fils.pmk_len; 1031 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 1032 params->fils.pmk_len); 1033 next += params->fils.pmk_len; 1034 } 1035 if (params->fils.pmkid) { 1036 ev->cr.fils.pmkid = next; 1037 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 1038 WLAN_PMKID_LEN); 1039 next += WLAN_PMKID_LEN; 1040 } 1041 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 1042 if (params->fils.update_erp_next_seq_num) 1043 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 1044 ev->cr.valid_links = params->valid_links; 1045 for_each_valid_link(params, link) { 1046 if (params->links[link].bss) 1047 cfg80211_hold_bss( 1048 bss_from_pub(params->links[link].bss)); 1049 ev->cr.links[link].bss = params->links[link].bss; 1050 ev->cr.links[link].status = params->links[link].status; 1051 1052 if (params->links[link].addr) { 1053 ev->cr.links[link].addr = next; 1054 memcpy((void *)ev->cr.links[link].addr, 1055 params->links[link].addr, 1056 ETH_ALEN); 1057 next += ETH_ALEN; 1058 } 1059 if (params->links[link].bssid) { 1060 ev->cr.links[link].bssid = next; 1061 memcpy((void *)ev->cr.links[link].bssid, 1062 params->links[link].bssid, 1063 ETH_ALEN); 1064 next += ETH_ALEN; 1065 } 1066 } 1067 ev->cr.status = params->status; 1068 ev->cr.timeout_reason = params->timeout_reason; 1069 1070 spin_lock_irqsave(&wdev->event_lock, flags); 1071 list_add_tail(&ev->list, &wdev->event_list); 1072 spin_unlock_irqrestore(&wdev->event_lock, flags); 1073 queue_work(cfg80211_wq, &rdev->event_work); 1074 } 1075 EXPORT_SYMBOL(cfg80211_connect_done); 1076 1077 /* Consumes bss object one way or another */ 1078 void __cfg80211_roamed(struct wireless_dev *wdev, 1079 struct cfg80211_roam_info *info) 1080 { 1081 #ifdef CONFIG_CFG80211_WEXT 1082 union iwreq_data wrqu; 1083 #endif 1084 unsigned int link; 1085 const u8 *connected_addr; 1086 1087 lockdep_assert_wiphy(wdev->wiphy); 1088 1089 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1090 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1091 goto out; 1092 1093 if (WARN_ON(!wdev->connected)) 1094 goto out; 1095 1096 if (info->valid_links) { 1097 if (WARN_ON(!info->ap_mld_addr)) 1098 goto out; 1099 1100 for_each_valid_link(info, link) { 1101 if (WARN_ON(!info->links[link].addr)) 1102 goto out; 1103 } 1104 } 1105 1106 cfg80211_wdev_release_bsses(wdev); 1107 1108 for_each_valid_link(info, link) { 1109 if (WARN_ON(!info->links[link].bss)) 1110 goto out; 1111 } 1112 1113 memset(wdev->links, 0, sizeof(wdev->links)); 1114 wdev->valid_links = info->valid_links; 1115 for_each_valid_link(info, link) { 1116 cfg80211_hold_bss(bss_from_pub(info->links[link].bss)); 1117 wdev->links[link].client.current_bss = 1118 bss_from_pub(info->links[link].bss); 1119 } 1120 1121 connected_addr = info->valid_links ? 1122 info->ap_mld_addr : 1123 info->links[0].bss->bssid; 1124 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 1125 if (info->valid_links) { 1126 for_each_valid_link(info, link) 1127 memcpy(wdev->links[link].addr, info->links[link].addr, 1128 ETH_ALEN); 1129 } 1130 wdev->unprot_beacon_reported = 0; 1131 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 1132 wdev->netdev, info, GFP_KERNEL); 1133 1134 #ifdef CONFIG_CFG80211_WEXT 1135 if (!info->valid_links) { 1136 if (info->req_ie) { 1137 memset(&wrqu, 0, sizeof(wrqu)); 1138 wrqu.data.length = info->req_ie_len; 1139 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 1140 &wrqu, info->req_ie); 1141 } 1142 1143 if (info->resp_ie) { 1144 memset(&wrqu, 0, sizeof(wrqu)); 1145 wrqu.data.length = info->resp_ie_len; 1146 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 1147 &wrqu, info->resp_ie); 1148 } 1149 1150 memset(&wrqu, 0, sizeof(wrqu)); 1151 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1152 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 1153 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 1154 wdev->wext.prev_bssid_valid = true; 1155 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 1156 } 1157 #endif 1158 1159 return; 1160 out: 1161 for_each_valid_link(info, link) 1162 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1163 } 1164 1165 /* Consumes info->links.bss object(s) one way or another */ 1166 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 1167 gfp_t gfp) 1168 { 1169 struct wireless_dev *wdev = dev->ieee80211_ptr; 1170 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1171 struct cfg80211_event *ev; 1172 unsigned long flags; 1173 u8 *next; 1174 unsigned int link; 1175 size_t link_info_size = 0; 1176 bool bss_not_found = false; 1177 1178 for_each_valid_link(info, link) { 1179 link_info_size += info->links[link].addr ? ETH_ALEN : 0; 1180 link_info_size += info->links[link].bssid ? ETH_ALEN : 0; 1181 1182 if (info->links[link].bss) 1183 continue; 1184 1185 info->links[link].bss = 1186 cfg80211_get_bss(wdev->wiphy, 1187 info->links[link].channel, 1188 info->links[link].bssid, 1189 wdev->u.client.ssid, 1190 wdev->u.client.ssid_len, 1191 wdev->conn_bss_type, 1192 IEEE80211_PRIVACY_ANY); 1193 1194 if (!info->links[link].bss) { 1195 bss_not_found = true; 1196 break; 1197 } 1198 } 1199 1200 if (WARN_ON(bss_not_found)) 1201 goto out; 1202 1203 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 1204 info->fils.kek_len + info->fils.pmk_len + 1205 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) + 1206 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp); 1207 if (!ev) 1208 goto out; 1209 1210 ev->type = EVENT_ROAMED; 1211 next = ((u8 *)ev) + sizeof(*ev); 1212 if (info->req_ie_len) { 1213 ev->rm.req_ie = next; 1214 ev->rm.req_ie_len = info->req_ie_len; 1215 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 1216 next += info->req_ie_len; 1217 } 1218 if (info->resp_ie_len) { 1219 ev->rm.resp_ie = next; 1220 ev->rm.resp_ie_len = info->resp_ie_len; 1221 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1222 info->resp_ie_len); 1223 next += info->resp_ie_len; 1224 } 1225 if (info->fils.kek_len) { 1226 ev->rm.fils.kek = next; 1227 ev->rm.fils.kek_len = info->fils.kek_len; 1228 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1229 info->fils.kek_len); 1230 next += info->fils.kek_len; 1231 } 1232 if (info->fils.pmk_len) { 1233 ev->rm.fils.pmk = next; 1234 ev->rm.fils.pmk_len = info->fils.pmk_len; 1235 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1236 info->fils.pmk_len); 1237 next += info->fils.pmk_len; 1238 } 1239 if (info->fils.pmkid) { 1240 ev->rm.fils.pmkid = next; 1241 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1242 WLAN_PMKID_LEN); 1243 next += WLAN_PMKID_LEN; 1244 } 1245 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1246 if (info->fils.update_erp_next_seq_num) 1247 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1248 if (info->ap_mld_addr) { 1249 ev->rm.ap_mld_addr = next; 1250 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr, 1251 ETH_ALEN); 1252 next += ETH_ALEN; 1253 } 1254 ev->rm.valid_links = info->valid_links; 1255 for_each_valid_link(info, link) { 1256 ev->rm.links[link].bss = info->links[link].bss; 1257 1258 if (info->links[link].addr) { 1259 ev->rm.links[link].addr = next; 1260 memcpy((void *)ev->rm.links[link].addr, 1261 info->links[link].addr, 1262 ETH_ALEN); 1263 next += ETH_ALEN; 1264 } 1265 1266 if (info->links[link].bssid) { 1267 ev->rm.links[link].bssid = next; 1268 memcpy((void *)ev->rm.links[link].bssid, 1269 info->links[link].bssid, 1270 ETH_ALEN); 1271 next += ETH_ALEN; 1272 } 1273 } 1274 1275 spin_lock_irqsave(&wdev->event_lock, flags); 1276 list_add_tail(&ev->list, &wdev->event_list); 1277 spin_unlock_irqrestore(&wdev->event_lock, flags); 1278 queue_work(cfg80211_wq, &rdev->event_work); 1279 1280 return; 1281 out: 1282 for_each_valid_link(info, link) 1283 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1284 1285 } 1286 EXPORT_SYMBOL(cfg80211_roamed); 1287 1288 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr, 1289 const u8 *td_bitmap, u8 td_bitmap_len) 1290 { 1291 lockdep_assert_wiphy(wdev->wiphy); 1292 1293 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1294 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT && 1295 wdev->iftype != NL80211_IFTYPE_AP && 1296 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1297 return; 1298 1299 if (wdev->iftype == NL80211_IFTYPE_STATION || 1300 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1301 if (WARN_ON(!wdev->connected) || 1302 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr))) 1303 return; 1304 } 1305 1306 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1307 peer_addr, td_bitmap, td_bitmap_len); 1308 } 1309 1310 void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr, 1311 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp) 1312 { 1313 struct wireless_dev *wdev = dev->ieee80211_ptr; 1314 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1315 struct cfg80211_event *ev; 1316 unsigned long flags; 1317 1318 if (WARN_ON(!peer_addr)) 1319 return; 1320 1321 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp); 1322 if (!ev) 1323 return; 1324 1325 ev->type = EVENT_PORT_AUTHORIZED; 1326 memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN); 1327 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev); 1328 ev->pa.td_bitmap_len = td_bitmap_len; 1329 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len); 1330 1331 /* 1332 * Use the wdev event list so that if there are pending 1333 * connected/roamed events, they will be reported first. 1334 */ 1335 spin_lock_irqsave(&wdev->event_lock, flags); 1336 list_add_tail(&ev->list, &wdev->event_list); 1337 spin_unlock_irqrestore(&wdev->event_lock, flags); 1338 queue_work(cfg80211_wq, &rdev->event_work); 1339 } 1340 EXPORT_SYMBOL(cfg80211_port_authorized); 1341 1342 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1343 size_t ie_len, u16 reason, bool from_ap) 1344 { 1345 struct wireless_dev *wdev = dev->ieee80211_ptr; 1346 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1347 int i; 1348 #ifdef CONFIG_CFG80211_WEXT 1349 union iwreq_data wrqu; 1350 #endif 1351 1352 lockdep_assert_wiphy(wdev->wiphy); 1353 1354 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1355 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1356 return; 1357 1358 cfg80211_wdev_release_bsses(wdev); 1359 wdev->valid_links = 0; 1360 wdev->connected = false; 1361 wdev->u.client.ssid_len = 0; 1362 wdev->conn_owner_nlportid = 0; 1363 kfree_sensitive(wdev->connect_keys); 1364 wdev->connect_keys = NULL; 1365 1366 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1367 1368 /* stop critical protocol if supported */ 1369 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1370 rdev->crit_proto_nlportid = 0; 1371 rdev_crit_proto_stop(rdev, wdev); 1372 } 1373 1374 /* 1375 * Delete all the keys ... pairwise keys can't really 1376 * exist any more anyway, but default keys might. 1377 */ 1378 if (rdev->ops->del_key) { 1379 int max_key_idx = 5; 1380 1381 if (wiphy_ext_feature_isset( 1382 wdev->wiphy, 1383 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1384 wiphy_ext_feature_isset( 1385 wdev->wiphy, 1386 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1387 max_key_idx = 7; 1388 for (i = 0; i <= max_key_idx; i++) 1389 rdev_del_key(rdev, dev, -1, i, false, NULL); 1390 } 1391 1392 rdev_set_qos_map(rdev, dev, NULL); 1393 1394 #ifdef CONFIG_CFG80211_WEXT 1395 memset(&wrqu, 0, sizeof(wrqu)); 1396 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1397 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1398 wdev->wext.connect.ssid_len = 0; 1399 #endif 1400 1401 schedule_work(&cfg80211_disconnect_work); 1402 1403 cfg80211_schedule_channels_check(wdev); 1404 } 1405 1406 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1407 const u8 *ie, size_t ie_len, 1408 bool locally_generated, gfp_t gfp) 1409 { 1410 struct wireless_dev *wdev = dev->ieee80211_ptr; 1411 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1412 struct cfg80211_event *ev; 1413 unsigned long flags; 1414 1415 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1416 if (!ev) 1417 return; 1418 1419 ev->type = EVENT_DISCONNECTED; 1420 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1421 ev->dc.ie_len = ie_len; 1422 memcpy((void *)ev->dc.ie, ie, ie_len); 1423 ev->dc.reason = reason; 1424 ev->dc.locally_generated = locally_generated; 1425 1426 spin_lock_irqsave(&wdev->event_lock, flags); 1427 list_add_tail(&ev->list, &wdev->event_list); 1428 spin_unlock_irqrestore(&wdev->event_lock, flags); 1429 queue_work(cfg80211_wq, &rdev->event_work); 1430 } 1431 EXPORT_SYMBOL(cfg80211_disconnected); 1432 1433 /* 1434 * API calls for nl80211/wext compatibility code 1435 */ 1436 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1437 struct net_device *dev, 1438 struct cfg80211_connect_params *connect, 1439 struct cfg80211_cached_keys *connkeys, 1440 const u8 *prev_bssid) 1441 { 1442 struct wireless_dev *wdev = dev->ieee80211_ptr; 1443 int err; 1444 1445 lockdep_assert_wiphy(wdev->wiphy); 1446 1447 /* 1448 * If we have an ssid_len, we're trying to connect or are 1449 * already connected, so reject a new SSID unless it's the 1450 * same (which is the case for re-association.) 1451 */ 1452 if (wdev->u.client.ssid_len && 1453 (wdev->u.client.ssid_len != connect->ssid_len || 1454 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) 1455 return -EALREADY; 1456 1457 /* 1458 * If connected, reject (re-)association unless prev_bssid 1459 * matches the current BSSID. 1460 */ 1461 if (wdev->connected) { 1462 if (!prev_bssid) 1463 return -EALREADY; 1464 if (!ether_addr_equal(prev_bssid, 1465 wdev->u.client.connected_addr)) 1466 return -ENOTCONN; 1467 } 1468 1469 /* 1470 * Reject if we're in the process of connecting with WEP, 1471 * this case isn't very interesting and trying to handle 1472 * it would make the code much more complex. 1473 */ 1474 if (wdev->connect_keys) 1475 return -EINPROGRESS; 1476 1477 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1478 rdev->wiphy.ht_capa_mod_mask); 1479 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1480 rdev->wiphy.vht_capa_mod_mask); 1481 1482 if (connkeys && connkeys->def >= 0) { 1483 int idx; 1484 u32 cipher; 1485 1486 idx = connkeys->def; 1487 cipher = connkeys->params[idx].cipher; 1488 /* If given a WEP key we may need it for shared key auth */ 1489 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1490 cipher == WLAN_CIPHER_SUITE_WEP104) { 1491 connect->key_idx = idx; 1492 connect->key = connkeys->params[idx].key; 1493 connect->key_len = connkeys->params[idx].key_len; 1494 1495 /* 1496 * If ciphers are not set (e.g. when going through 1497 * iwconfig), we have to set them appropriately here. 1498 */ 1499 if (connect->crypto.cipher_group == 0) 1500 connect->crypto.cipher_group = cipher; 1501 1502 if (connect->crypto.n_ciphers_pairwise == 0) { 1503 connect->crypto.n_ciphers_pairwise = 1; 1504 connect->crypto.ciphers_pairwise[0] = cipher; 1505 } 1506 } 1507 } else { 1508 if (WARN_ON(connkeys)) 1509 return -EINVAL; 1510 1511 /* connect can point to wdev->wext.connect which 1512 * can hold key data from a previous connection 1513 */ 1514 connect->key = NULL; 1515 connect->key_len = 0; 1516 connect->key_idx = 0; 1517 } 1518 1519 wdev->connect_keys = connkeys; 1520 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); 1521 wdev->u.client.ssid_len = connect->ssid_len; 1522 1523 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1524 IEEE80211_BSS_TYPE_ESS; 1525 1526 if (!rdev->ops->connect) 1527 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1528 else 1529 err = rdev_connect(rdev, dev, connect); 1530 1531 if (err) { 1532 wdev->connect_keys = NULL; 1533 /* 1534 * This could be reassoc getting refused, don't clear 1535 * ssid_len in that case. 1536 */ 1537 if (!wdev->connected) 1538 wdev->u.client.ssid_len = 0; 1539 return err; 1540 } 1541 1542 return 0; 1543 } 1544 1545 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1546 struct net_device *dev, u16 reason, bool wextev) 1547 { 1548 struct wireless_dev *wdev = dev->ieee80211_ptr; 1549 int err = 0; 1550 1551 lockdep_assert_wiphy(wdev->wiphy); 1552 1553 kfree_sensitive(wdev->connect_keys); 1554 wdev->connect_keys = NULL; 1555 1556 wdev->conn_owner_nlportid = 0; 1557 1558 if (wdev->conn) 1559 err = cfg80211_sme_disconnect(wdev, reason); 1560 else if (!rdev->ops->disconnect) 1561 cfg80211_mlme_down(rdev, dev); 1562 else if (wdev->u.client.ssid_len) 1563 err = rdev_disconnect(rdev, dev, reason); 1564 1565 /* 1566 * Clear ssid_len unless we actually were fully connected, 1567 * in which case cfg80211_disconnected() will take care of 1568 * this later. 1569 */ 1570 if (!wdev->connected) 1571 wdev->u.client.ssid_len = 0; 1572 1573 return err; 1574 } 1575 1576 /* 1577 * Used to clean up after the connection / connection attempt owner socket 1578 * disconnects 1579 */ 1580 void cfg80211_autodisconnect_wk(struct work_struct *work) 1581 { 1582 struct wireless_dev *wdev = 1583 container_of(work, struct wireless_dev, disconnect_wk); 1584 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1585 1586 wiphy_lock(wdev->wiphy); 1587 1588 if (wdev->conn_owner_nlportid) { 1589 switch (wdev->iftype) { 1590 case NL80211_IFTYPE_ADHOC: 1591 cfg80211_leave_ibss(rdev, wdev->netdev, false); 1592 break; 1593 case NL80211_IFTYPE_AP: 1594 case NL80211_IFTYPE_P2P_GO: 1595 cfg80211_stop_ap(rdev, wdev->netdev, -1, false); 1596 break; 1597 case NL80211_IFTYPE_MESH_POINT: 1598 cfg80211_leave_mesh(rdev, wdev->netdev); 1599 break; 1600 case NL80211_IFTYPE_STATION: 1601 case NL80211_IFTYPE_P2P_CLIENT: 1602 /* 1603 * Use disconnect_bssid if still connecting and 1604 * ops->disconnect not implemented. Otherwise we can 1605 * use cfg80211_disconnect. 1606 */ 1607 if (rdev->ops->disconnect || wdev->connected) 1608 cfg80211_disconnect(rdev, wdev->netdev, 1609 WLAN_REASON_DEAUTH_LEAVING, 1610 true); 1611 else 1612 cfg80211_mlme_deauth(rdev, wdev->netdev, 1613 wdev->disconnect_bssid, 1614 NULL, 0, 1615 WLAN_REASON_DEAUTH_LEAVING, 1616 false); 1617 break; 1618 default: 1619 break; 1620 } 1621 } 1622 1623 wiphy_unlock(wdev->wiphy); 1624 } 1625