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 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 = cfg80211_scan(rdev); 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 lockdep_assert_wiphy(wdev->wiphy); 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, 213 &req, NULL); 214 cfg80211_put_bss(&rdev->wiphy, req.bss); 215 } 216 217 if (err) 218 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 219 NULL, 0, 220 WLAN_REASON_DEAUTH_LEAVING, 221 false); 222 return err; 223 case CFG80211_CONN_ASSOC_FAILED_TIMEOUT: 224 *treason = NL80211_TIMEOUT_ASSOC; 225 fallthrough; 226 case CFG80211_CONN_ASSOC_FAILED: 227 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 228 NULL, 0, 229 WLAN_REASON_DEAUTH_LEAVING, false); 230 return -ENOTCONN; 231 case CFG80211_CONN_DEAUTH: 232 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 233 NULL, 0, 234 WLAN_REASON_DEAUTH_LEAVING, false); 235 fallthrough; 236 case CFG80211_CONN_ABANDON: 237 /* free directly, disconnected event already sent */ 238 cfg80211_sme_free(wdev); 239 return 0; 240 default: 241 return 0; 242 } 243 } 244 245 void cfg80211_conn_work(struct work_struct *work) 246 { 247 struct cfg80211_registered_device *rdev = 248 container_of(work, struct cfg80211_registered_device, conn_work); 249 struct wireless_dev *wdev; 250 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 251 enum nl80211_timeout_reason treason; 252 253 wiphy_lock(&rdev->wiphy); 254 255 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 256 if (!wdev->netdev) 257 continue; 258 259 if (!netif_running(wdev->netdev)) 260 continue; 261 262 if (!wdev->conn || 263 wdev->conn->state == CFG80211_CONN_CONNECTED) 264 continue; 265 266 if (wdev->conn->params.bssid) { 267 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 268 bssid = bssid_buf; 269 } 270 treason = NL80211_TIMEOUT_UNSPECIFIED; 271 if (cfg80211_conn_do_work(wdev, &treason)) { 272 struct cfg80211_connect_resp_params cr; 273 274 memset(&cr, 0, sizeof(cr)); 275 cr.status = -1; 276 cr.links[0].bssid = bssid; 277 cr.timeout_reason = treason; 278 __cfg80211_connect_result(wdev->netdev, &cr, false); 279 } 280 } 281 282 wiphy_unlock(&rdev->wiphy); 283 } 284 285 static void cfg80211_step_auth_next(struct cfg80211_conn *conn, 286 struct cfg80211_bss *bss) 287 { 288 memcpy(conn->bssid, bss->bssid, ETH_ALEN); 289 conn->params.bssid = conn->bssid; 290 conn->params.channel = bss->channel; 291 conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 292 } 293 294 /* Returned bss is reference counted and must be cleaned up appropriately. */ 295 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 296 { 297 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 298 struct cfg80211_bss *bss; 299 300 lockdep_assert_wiphy(wdev->wiphy); 301 302 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 303 wdev->conn->params.bssid, 304 wdev->conn->params.ssid, 305 wdev->conn->params.ssid_len, 306 wdev->conn_bss_type, 307 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 308 if (!bss) 309 return NULL; 310 311 cfg80211_step_auth_next(wdev->conn, bss); 312 schedule_work(&rdev->conn_work); 313 314 return bss; 315 } 316 317 void cfg80211_sme_scan_done(struct net_device *dev) 318 { 319 struct wireless_dev *wdev = dev->ieee80211_ptr; 320 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 321 struct cfg80211_bss *bss; 322 323 lockdep_assert_wiphy(wdev->wiphy); 324 325 if (!wdev->conn) 326 return; 327 328 if (wdev->conn->state != CFG80211_CONN_SCANNING && 329 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 330 return; 331 332 bss = cfg80211_get_conn_bss(wdev); 333 if (bss) 334 cfg80211_put_bss(&rdev->wiphy, bss); 335 else 336 schedule_work(&rdev->conn_work); 337 } 338 339 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 340 { 341 struct wiphy *wiphy = wdev->wiphy; 342 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 343 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 344 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 345 346 lockdep_assert_wiphy(wdev->wiphy); 347 348 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 349 return; 350 351 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 352 wdev->conn->auto_auth && 353 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 354 /* select automatically between only open, shared, leap */ 355 switch (wdev->conn->params.auth_type) { 356 case NL80211_AUTHTYPE_OPEN_SYSTEM: 357 if (wdev->connect_keys) 358 wdev->conn->params.auth_type = 359 NL80211_AUTHTYPE_SHARED_KEY; 360 else 361 wdev->conn->params.auth_type = 362 NL80211_AUTHTYPE_NETWORK_EAP; 363 break; 364 case NL80211_AUTHTYPE_SHARED_KEY: 365 wdev->conn->params.auth_type = 366 NL80211_AUTHTYPE_NETWORK_EAP; 367 break; 368 default: 369 /* huh? */ 370 wdev->conn->params.auth_type = 371 NL80211_AUTHTYPE_OPEN_SYSTEM; 372 break; 373 } 374 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 375 schedule_work(&rdev->conn_work); 376 } else if (status_code != WLAN_STATUS_SUCCESS) { 377 struct cfg80211_connect_resp_params cr; 378 379 memset(&cr, 0, sizeof(cr)); 380 cr.status = status_code; 381 cr.links[0].bssid = mgmt->bssid; 382 cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; 383 __cfg80211_connect_result(wdev->netdev, &cr, false); 384 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 385 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 386 schedule_work(&rdev->conn_work); 387 } 388 } 389 390 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 391 { 392 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 393 394 if (!wdev->conn) 395 return false; 396 397 if (status == WLAN_STATUS_SUCCESS) { 398 wdev->conn->state = CFG80211_CONN_CONNECTED; 399 return false; 400 } 401 402 if (wdev->conn->prev_bssid_valid) { 403 /* 404 * Some stupid APs don't accept reassoc, so we 405 * need to fall back to trying regular assoc; 406 * return true so no event is sent to userspace. 407 */ 408 wdev->conn->prev_bssid_valid = false; 409 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 410 schedule_work(&rdev->conn_work); 411 return true; 412 } 413 414 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 415 schedule_work(&rdev->conn_work); 416 return false; 417 } 418 419 void cfg80211_sme_deauth(struct wireless_dev *wdev) 420 { 421 cfg80211_sme_free(wdev); 422 } 423 424 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 425 { 426 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 427 428 if (!wdev->conn) 429 return; 430 431 wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; 432 schedule_work(&rdev->conn_work); 433 } 434 435 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 436 { 437 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 438 439 if (!wdev->conn) 440 return; 441 442 wdev->conn->state = CFG80211_CONN_DEAUTH; 443 schedule_work(&rdev->conn_work); 444 } 445 446 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 447 { 448 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 449 450 if (!wdev->conn) 451 return; 452 453 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; 454 schedule_work(&rdev->conn_work); 455 } 456 457 void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) 458 { 459 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 460 461 if (!wdev->conn) 462 return; 463 464 wdev->conn->state = CFG80211_CONN_ABANDON; 465 schedule_work(&rdev->conn_work); 466 } 467 468 static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev) 469 { 470 unsigned int link; 471 472 for_each_valid_link(wdev, link) { 473 if (!wdev->links[link].client.current_bss) 474 continue; 475 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 476 cfg80211_put_bss(wdev->wiphy, 477 &wdev->links[link].client.current_bss->pub); 478 wdev->links[link].client.current_bss = NULL; 479 } 480 } 481 482 void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask) 483 { 484 unsigned int link; 485 486 for_each_valid_link(wdev, link) { 487 if (!wdev->links[link].client.current_bss || 488 !(link_mask & BIT(link))) 489 continue; 490 cfg80211_unhold_bss(wdev->links[link].client.current_bss); 491 cfg80211_put_bss(wdev->wiphy, 492 &wdev->links[link].client.current_bss->pub); 493 wdev->links[link].client.current_bss = NULL; 494 } 495 } 496 497 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 498 const u8 *ies, size_t ies_len, 499 const u8 **out_ies, size_t *out_ies_len) 500 { 501 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 502 u8 *buf; 503 size_t offs; 504 505 if (!rdev->wiphy.extended_capabilities_len || 506 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 507 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 508 if (!*out_ies) 509 return -ENOMEM; 510 *out_ies_len = ies_len; 511 return 0; 512 } 513 514 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 515 GFP_KERNEL); 516 if (!buf) 517 return -ENOMEM; 518 519 if (ies_len) { 520 static const u8 before_extcapa[] = { 521 /* not listing IEs expected to be created by driver */ 522 WLAN_EID_RSN, 523 WLAN_EID_QOS_CAPA, 524 WLAN_EID_RRM_ENABLED_CAPABILITIES, 525 WLAN_EID_MOBILITY_DOMAIN, 526 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 527 WLAN_EID_BSS_COEX_2040, 528 }; 529 530 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 531 ARRAY_SIZE(before_extcapa), 0); 532 memcpy(buf, ies, offs); 533 /* leave a whole for extended capabilities IE */ 534 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 535 ies + offs, ies_len - offs); 536 } else { 537 offs = 0; 538 } 539 540 /* place extended capabilities IE (with only driver capabilities) */ 541 buf[offs] = WLAN_EID_EXT_CAPABILITY; 542 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 543 memcpy(buf + offs + 2, 544 rdev->wiphy.extended_capabilities, 545 rdev->wiphy.extended_capabilities_len); 546 547 *out_ies = buf; 548 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 549 550 return 0; 551 } 552 553 static int cfg80211_sme_connect(struct wireless_dev *wdev, 554 struct cfg80211_connect_params *connect, 555 const u8 *prev_bssid) 556 { 557 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 558 struct cfg80211_bss *bss; 559 int err; 560 561 if (!rdev->ops->auth || !rdev->ops->assoc) 562 return -EOPNOTSUPP; 563 564 cfg80211_wdev_release_bsses(wdev); 565 566 if (wdev->connected) { 567 cfg80211_sme_free(wdev); 568 wdev->connected = false; 569 } 570 571 if (wdev->conn) 572 return -EINPROGRESS; 573 574 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 575 if (!wdev->conn) 576 return -ENOMEM; 577 578 /* 579 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 580 */ 581 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 582 if (connect->bssid) { 583 wdev->conn->params.bssid = wdev->conn->bssid; 584 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 585 } 586 587 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 588 &wdev->conn->ie, 589 &wdev->conn->params.ie_len)) { 590 kfree(wdev->conn); 591 wdev->conn = NULL; 592 return -ENOMEM; 593 } 594 wdev->conn->params.ie = wdev->conn->ie; 595 596 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 597 wdev->conn->auto_auth = true; 598 /* start with open system ... should mostly work */ 599 wdev->conn->params.auth_type = 600 NL80211_AUTHTYPE_OPEN_SYSTEM; 601 } else { 602 wdev->conn->auto_auth = false; 603 } 604 605 wdev->conn->params.ssid = wdev->u.client.ssid; 606 wdev->conn->params.ssid_len = wdev->u.client.ssid_len; 607 608 /* see if we have the bss already */ 609 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 610 wdev->conn->params.bssid, 611 wdev->conn->params.ssid, 612 wdev->conn->params.ssid_len, 613 wdev->conn_bss_type, 614 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 615 616 if (prev_bssid) { 617 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 618 wdev->conn->prev_bssid_valid = true; 619 } 620 621 /* we're good if we have a matching bss struct */ 622 if (bss) { 623 enum nl80211_timeout_reason treason; 624 625 cfg80211_step_auth_next(wdev->conn, bss); 626 err = cfg80211_conn_do_work(wdev, &treason); 627 cfg80211_put_bss(wdev->wiphy, bss); 628 } else { 629 /* otherwise we'll need to scan for the AP first */ 630 err = cfg80211_conn_scan(wdev); 631 632 /* 633 * If we can't scan right now, then we need to scan again 634 * after the current scan finished, since the parameters 635 * changed (unless we find a good AP anyway). 636 */ 637 if (err == -EBUSY) { 638 err = 0; 639 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 640 } 641 } 642 643 if (err) 644 cfg80211_sme_free(wdev); 645 646 return err; 647 } 648 649 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 650 { 651 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 652 int err; 653 654 if (!wdev->conn) 655 return 0; 656 657 if (!rdev->ops->deauth) 658 return -EOPNOTSUPP; 659 660 if (wdev->conn->state == CFG80211_CONN_SCANNING || 661 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 662 err = 0; 663 goto out; 664 } 665 666 /* wdev->conn->params.bssid must be set if > SCANNING */ 667 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 668 wdev->conn->params.bssid, 669 NULL, 0, reason, false); 670 out: 671 cfg80211_sme_free(wdev); 672 return err; 673 } 674 675 /* 676 * code shared for in-device and software SME 677 */ 678 679 static bool cfg80211_is_all_idle(void) 680 { 681 struct cfg80211_registered_device *rdev; 682 struct wireless_dev *wdev; 683 bool is_all_idle = true; 684 685 /* 686 * All devices must be idle as otherwise if you are actively 687 * scanning some new beacon hints could be learned and would 688 * count as new regulatory hints. 689 * Also if there is any other active beaconing interface we 690 * need not issue a disconnect hint and reset any info such 691 * as chan dfs state, etc. 692 */ 693 for_each_rdev(rdev) { 694 wiphy_lock(&rdev->wiphy); 695 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 696 if (wdev->conn || wdev->connected || 697 cfg80211_beaconing_iface_active(wdev)) 698 is_all_idle = false; 699 } 700 wiphy_unlock(&rdev->wiphy); 701 } 702 703 return is_all_idle; 704 } 705 706 static void disconnect_work(struct work_struct *work) 707 { 708 rtnl_lock(); 709 if (cfg80211_is_all_idle()) 710 regulatory_hint_disconnect(); 711 rtnl_unlock(); 712 } 713 714 DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 715 716 static void 717 cfg80211_connect_result_release_bsses(struct wireless_dev *wdev, 718 struct cfg80211_connect_resp_params *cr) 719 { 720 unsigned int link; 721 722 for_each_valid_link(cr, link) { 723 if (!cr->links[link].bss) 724 continue; 725 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 726 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 727 } 728 } 729 730 /* 731 * API calls for drivers implementing connect/disconnect and 732 * SME event handling 733 */ 734 735 /* This method must consume bss one way or another */ 736 void __cfg80211_connect_result(struct net_device *dev, 737 struct cfg80211_connect_resp_params *cr, 738 bool wextev) 739 { 740 struct wireless_dev *wdev = dev->ieee80211_ptr; 741 const struct element *country_elem = NULL; 742 const struct element *ssid; 743 const u8 *country_data; 744 u8 country_datalen; 745 #ifdef CONFIG_CFG80211_WEXT 746 union iwreq_data wrqu; 747 #endif 748 unsigned int link; 749 const u8 *connected_addr; 750 bool bss_not_found = false; 751 752 lockdep_assert_wiphy(wdev->wiphy); 753 754 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 755 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 756 goto out; 757 758 if (cr->valid_links) { 759 if (WARN_ON(!cr->ap_mld_addr)) 760 goto out; 761 762 for_each_valid_link(cr, link) { 763 if (WARN_ON(!cr->links[link].addr)) 764 goto out; 765 } 766 767 if (WARN_ON(wdev->connect_keys)) 768 goto out; 769 } 770 771 wdev->unprot_beacon_reported = 0; 772 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, 773 GFP_KERNEL); 774 connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid; 775 776 #ifdef CONFIG_CFG80211_WEXT 777 if (wextev && !cr->valid_links) { 778 if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { 779 memset(&wrqu, 0, sizeof(wrqu)); 780 wrqu.data.length = cr->req_ie_len; 781 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, 782 cr->req_ie); 783 } 784 785 if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { 786 memset(&wrqu, 0, sizeof(wrqu)); 787 wrqu.data.length = cr->resp_ie_len; 788 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, 789 cr->resp_ie); 790 } 791 792 memset(&wrqu, 0, sizeof(wrqu)); 793 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 794 if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) { 795 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 796 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 797 wdev->wext.prev_bssid_valid = true; 798 } 799 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 800 } 801 #endif 802 803 if (cr->status == WLAN_STATUS_SUCCESS) { 804 if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) { 805 for_each_valid_link(cr, link) { 806 if (WARN_ON_ONCE(!cr->links[link].bss)) 807 break; 808 } 809 } 810 811 for_each_valid_link(cr, link) { 812 /* don't do extra lookups for failures */ 813 if (cr->links[link].status != WLAN_STATUS_SUCCESS) 814 continue; 815 816 if (cr->links[link].bss) 817 continue; 818 819 cr->links[link].bss = 820 cfg80211_get_bss(wdev->wiphy, NULL, 821 cr->links[link].bssid, 822 wdev->u.client.ssid, 823 wdev->u.client.ssid_len, 824 wdev->conn_bss_type, 825 IEEE80211_PRIVACY_ANY); 826 if (!cr->links[link].bss) { 827 bss_not_found = true; 828 break; 829 } 830 cfg80211_hold_bss(bss_from_pub(cr->links[link].bss)); 831 } 832 } 833 834 cfg80211_wdev_release_bsses(wdev); 835 836 if (cr->status != WLAN_STATUS_SUCCESS) { 837 kfree_sensitive(wdev->connect_keys); 838 wdev->connect_keys = NULL; 839 wdev->u.client.ssid_len = 0; 840 wdev->conn_owner_nlportid = 0; 841 cfg80211_connect_result_release_bsses(wdev, cr); 842 cfg80211_sme_free(wdev); 843 return; 844 } 845 846 if (WARN_ON(bss_not_found)) { 847 cfg80211_connect_result_release_bsses(wdev, cr); 848 return; 849 } 850 851 memset(wdev->links, 0, sizeof(wdev->links)); 852 for_each_valid_link(cr, link) { 853 if (cr->links[link].status == WLAN_STATUS_SUCCESS) 854 continue; 855 cr->valid_links &= ~BIT(link); 856 /* don't require bss pointer for failed links */ 857 if (!cr->links[link].bss) 858 continue; 859 cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); 860 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 861 } 862 wdev->valid_links = cr->valid_links; 863 for_each_valid_link(cr, link) 864 wdev->links[link].client.current_bss = 865 bss_from_pub(cr->links[link].bss); 866 wdev->connected = true; 867 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 868 if (cr->valid_links) { 869 for_each_valid_link(cr, link) 870 memcpy(wdev->links[link].addr, cr->links[link].addr, 871 ETH_ALEN); 872 } 873 874 cfg80211_upload_connect_keys(wdev); 875 876 rcu_read_lock(); 877 for_each_valid_link(cr, link) { 878 country_elem = 879 ieee80211_bss_get_elem(cr->links[link].bss, 880 WLAN_EID_COUNTRY); 881 if (country_elem) 882 break; 883 } 884 if (!country_elem) { 885 rcu_read_unlock(); 886 return; 887 } 888 889 country_datalen = country_elem->datalen; 890 country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); 891 rcu_read_unlock(); 892 893 if (!country_data) 894 return; 895 896 regulatory_hint_country_ie(wdev->wiphy, 897 cr->links[link].bss->channel->band, 898 country_data, country_datalen); 899 kfree(country_data); 900 901 if (!wdev->u.client.ssid_len) { 902 rcu_read_lock(); 903 for_each_valid_link(cr, link) { 904 ssid = ieee80211_bss_get_elem(cr->links[link].bss, 905 WLAN_EID_SSID); 906 907 if (!ssid || !ssid->datalen) 908 continue; 909 910 memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen); 911 wdev->u.client.ssid_len = ssid->datalen; 912 break; 913 } 914 rcu_read_unlock(); 915 } 916 917 return; 918 out: 919 for_each_valid_link(cr, link) 920 cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); 921 } 922 923 static void cfg80211_update_link_bss(struct wireless_dev *wdev, 924 struct cfg80211_bss **bss) 925 { 926 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 927 struct cfg80211_internal_bss *ibss; 928 929 if (!*bss) 930 return; 931 932 ibss = bss_from_pub(*bss); 933 if (list_empty(&ibss->list)) { 934 struct cfg80211_bss *found = NULL, *tmp = *bss; 935 936 found = cfg80211_get_bss(wdev->wiphy, NULL, 937 (*bss)->bssid, 938 wdev->u.client.ssid, 939 wdev->u.client.ssid_len, 940 wdev->conn_bss_type, 941 IEEE80211_PRIVACY_ANY); 942 if (found) { 943 /* The same BSS is already updated so use it 944 * instead, as it has latest info. 945 */ 946 *bss = found; 947 } else { 948 /* Update with BSS provided by driver, it will 949 * be freshly added and ref cnted, we can free 950 * the old one. 951 * 952 * signal_valid can be false, as we are not 953 * expecting the BSS to be found. 954 * 955 * keep the old timestamp to avoid confusion 956 */ 957 cfg80211_bss_update(rdev, ibss, false, 958 ibss->ts); 959 } 960 961 cfg80211_put_bss(wdev->wiphy, tmp); 962 } 963 } 964 965 /* Consumes bss object(s) one way or another */ 966 void cfg80211_connect_done(struct net_device *dev, 967 struct cfg80211_connect_resp_params *params, 968 gfp_t gfp) 969 { 970 struct wireless_dev *wdev = dev->ieee80211_ptr; 971 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 972 struct cfg80211_event *ev; 973 unsigned long flags; 974 u8 *next; 975 size_t link_info_size = 0; 976 unsigned int link; 977 978 for_each_valid_link(params, link) { 979 cfg80211_update_link_bss(wdev, ¶ms->links[link].bss); 980 link_info_size += params->links[link].bssid ? ETH_ALEN : 0; 981 link_info_size += params->links[link].addr ? ETH_ALEN : 0; 982 } 983 984 ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) + 985 params->req_ie_len + params->resp_ie_len + 986 params->fils.kek_len + params->fils.pmk_len + 987 (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size, 988 gfp); 989 990 if (!ev) { 991 for_each_valid_link(params, link) 992 cfg80211_put_bss(wdev->wiphy, 993 params->links[link].bss); 994 return; 995 } 996 997 ev->type = EVENT_CONNECT_RESULT; 998 next = ((u8 *)ev) + sizeof(*ev); 999 if (params->ap_mld_addr) { 1000 ev->cr.ap_mld_addr = next; 1001 memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr, 1002 ETH_ALEN); 1003 next += ETH_ALEN; 1004 } 1005 if (params->req_ie_len) { 1006 ev->cr.req_ie = next; 1007 ev->cr.req_ie_len = params->req_ie_len; 1008 memcpy((void *)ev->cr.req_ie, params->req_ie, 1009 params->req_ie_len); 1010 next += params->req_ie_len; 1011 } 1012 if (params->resp_ie_len) { 1013 ev->cr.resp_ie = next; 1014 ev->cr.resp_ie_len = params->resp_ie_len; 1015 memcpy((void *)ev->cr.resp_ie, params->resp_ie, 1016 params->resp_ie_len); 1017 next += params->resp_ie_len; 1018 } 1019 if (params->fils.kek_len) { 1020 ev->cr.fils.kek = next; 1021 ev->cr.fils.kek_len = params->fils.kek_len; 1022 memcpy((void *)ev->cr.fils.kek, params->fils.kek, 1023 params->fils.kek_len); 1024 next += params->fils.kek_len; 1025 } 1026 if (params->fils.pmk_len) { 1027 ev->cr.fils.pmk = next; 1028 ev->cr.fils.pmk_len = params->fils.pmk_len; 1029 memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, 1030 params->fils.pmk_len); 1031 next += params->fils.pmk_len; 1032 } 1033 if (params->fils.pmkid) { 1034 ev->cr.fils.pmkid = next; 1035 memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, 1036 WLAN_PMKID_LEN); 1037 next += WLAN_PMKID_LEN; 1038 } 1039 ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; 1040 if (params->fils.update_erp_next_seq_num) 1041 ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; 1042 ev->cr.valid_links = params->valid_links; 1043 for_each_valid_link(params, link) { 1044 if (params->links[link].bss) 1045 cfg80211_hold_bss( 1046 bss_from_pub(params->links[link].bss)); 1047 ev->cr.links[link].bss = params->links[link].bss; 1048 ev->cr.links[link].status = params->links[link].status; 1049 1050 if (params->links[link].addr) { 1051 ev->cr.links[link].addr = next; 1052 memcpy((void *)ev->cr.links[link].addr, 1053 params->links[link].addr, 1054 ETH_ALEN); 1055 next += ETH_ALEN; 1056 } 1057 if (params->links[link].bssid) { 1058 ev->cr.links[link].bssid = next; 1059 memcpy((void *)ev->cr.links[link].bssid, 1060 params->links[link].bssid, 1061 ETH_ALEN); 1062 next += ETH_ALEN; 1063 } 1064 } 1065 ev->cr.status = params->status; 1066 ev->cr.timeout_reason = params->timeout_reason; 1067 1068 spin_lock_irqsave(&wdev->event_lock, flags); 1069 list_add_tail(&ev->list, &wdev->event_list); 1070 spin_unlock_irqrestore(&wdev->event_lock, flags); 1071 queue_work(cfg80211_wq, &rdev->event_work); 1072 } 1073 EXPORT_SYMBOL(cfg80211_connect_done); 1074 1075 /* Consumes bss object one way or another */ 1076 void __cfg80211_roamed(struct wireless_dev *wdev, 1077 struct cfg80211_roam_info *info) 1078 { 1079 #ifdef CONFIG_CFG80211_WEXT 1080 union iwreq_data wrqu; 1081 #endif 1082 unsigned int link; 1083 const u8 *connected_addr; 1084 1085 lockdep_assert_wiphy(wdev->wiphy); 1086 1087 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1088 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1089 goto out; 1090 1091 if (WARN_ON(!wdev->connected)) 1092 goto out; 1093 1094 if (info->valid_links) { 1095 if (WARN_ON(!info->ap_mld_addr)) 1096 goto out; 1097 1098 for_each_valid_link(info, link) { 1099 if (WARN_ON(!info->links[link].addr)) 1100 goto out; 1101 } 1102 } 1103 1104 cfg80211_wdev_release_bsses(wdev); 1105 1106 for_each_valid_link(info, link) { 1107 if (WARN_ON(!info->links[link].bss)) 1108 goto out; 1109 } 1110 1111 memset(wdev->links, 0, sizeof(wdev->links)); 1112 wdev->valid_links = info->valid_links; 1113 for_each_valid_link(info, link) { 1114 cfg80211_hold_bss(bss_from_pub(info->links[link].bss)); 1115 wdev->links[link].client.current_bss = 1116 bss_from_pub(info->links[link].bss); 1117 } 1118 1119 connected_addr = info->valid_links ? 1120 info->ap_mld_addr : 1121 info->links[0].bss->bssid; 1122 ether_addr_copy(wdev->u.client.connected_addr, connected_addr); 1123 if (info->valid_links) { 1124 for_each_valid_link(info, link) 1125 memcpy(wdev->links[link].addr, info->links[link].addr, 1126 ETH_ALEN); 1127 } 1128 wdev->unprot_beacon_reported = 0; 1129 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 1130 wdev->netdev, info, GFP_KERNEL); 1131 1132 #ifdef CONFIG_CFG80211_WEXT 1133 if (!info->valid_links) { 1134 if (info->req_ie) { 1135 memset(&wrqu, 0, sizeof(wrqu)); 1136 wrqu.data.length = info->req_ie_len; 1137 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 1138 &wrqu, info->req_ie); 1139 } 1140 1141 if (info->resp_ie) { 1142 memset(&wrqu, 0, sizeof(wrqu)); 1143 wrqu.data.length = info->resp_ie_len; 1144 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 1145 &wrqu, info->resp_ie); 1146 } 1147 1148 memset(&wrqu, 0, sizeof(wrqu)); 1149 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1150 memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); 1151 memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); 1152 wdev->wext.prev_bssid_valid = true; 1153 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 1154 } 1155 #endif 1156 1157 return; 1158 out: 1159 for_each_valid_link(info, link) 1160 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1161 } 1162 1163 /* Consumes info->links.bss object(s) one way or another */ 1164 void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, 1165 gfp_t gfp) 1166 { 1167 struct wireless_dev *wdev = dev->ieee80211_ptr; 1168 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1169 struct cfg80211_event *ev; 1170 unsigned long flags; 1171 u8 *next; 1172 unsigned int link; 1173 size_t link_info_size = 0; 1174 bool bss_not_found = false; 1175 1176 for_each_valid_link(info, link) { 1177 link_info_size += info->links[link].addr ? ETH_ALEN : 0; 1178 link_info_size += info->links[link].bssid ? ETH_ALEN : 0; 1179 1180 if (info->links[link].bss) 1181 continue; 1182 1183 info->links[link].bss = 1184 cfg80211_get_bss(wdev->wiphy, 1185 info->links[link].channel, 1186 info->links[link].bssid, 1187 wdev->u.client.ssid, 1188 wdev->u.client.ssid_len, 1189 wdev->conn_bss_type, 1190 IEEE80211_PRIVACY_ANY); 1191 1192 if (!info->links[link].bss) { 1193 bss_not_found = true; 1194 break; 1195 } 1196 } 1197 1198 if (WARN_ON(bss_not_found)) 1199 goto out; 1200 1201 ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + 1202 info->fils.kek_len + info->fils.pmk_len + 1203 (info->fils.pmkid ? WLAN_PMKID_LEN : 0) + 1204 (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp); 1205 if (!ev) 1206 goto out; 1207 1208 ev->type = EVENT_ROAMED; 1209 next = ((u8 *)ev) + sizeof(*ev); 1210 if (info->req_ie_len) { 1211 ev->rm.req_ie = next; 1212 ev->rm.req_ie_len = info->req_ie_len; 1213 memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); 1214 next += info->req_ie_len; 1215 } 1216 if (info->resp_ie_len) { 1217 ev->rm.resp_ie = next; 1218 ev->rm.resp_ie_len = info->resp_ie_len; 1219 memcpy((void *)ev->rm.resp_ie, info->resp_ie, 1220 info->resp_ie_len); 1221 next += info->resp_ie_len; 1222 } 1223 if (info->fils.kek_len) { 1224 ev->rm.fils.kek = next; 1225 ev->rm.fils.kek_len = info->fils.kek_len; 1226 memcpy((void *)ev->rm.fils.kek, info->fils.kek, 1227 info->fils.kek_len); 1228 next += info->fils.kek_len; 1229 } 1230 if (info->fils.pmk_len) { 1231 ev->rm.fils.pmk = next; 1232 ev->rm.fils.pmk_len = info->fils.pmk_len; 1233 memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, 1234 info->fils.pmk_len); 1235 next += info->fils.pmk_len; 1236 } 1237 if (info->fils.pmkid) { 1238 ev->rm.fils.pmkid = next; 1239 memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, 1240 WLAN_PMKID_LEN); 1241 next += WLAN_PMKID_LEN; 1242 } 1243 ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; 1244 if (info->fils.update_erp_next_seq_num) 1245 ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; 1246 if (info->ap_mld_addr) { 1247 ev->rm.ap_mld_addr = next; 1248 memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr, 1249 ETH_ALEN); 1250 next += ETH_ALEN; 1251 } 1252 ev->rm.valid_links = info->valid_links; 1253 for_each_valid_link(info, link) { 1254 ev->rm.links[link].bss = info->links[link].bss; 1255 1256 if (info->links[link].addr) { 1257 ev->rm.links[link].addr = next; 1258 memcpy((void *)ev->rm.links[link].addr, 1259 info->links[link].addr, 1260 ETH_ALEN); 1261 next += ETH_ALEN; 1262 } 1263 1264 if (info->links[link].bssid) { 1265 ev->rm.links[link].bssid = next; 1266 memcpy((void *)ev->rm.links[link].bssid, 1267 info->links[link].bssid, 1268 ETH_ALEN); 1269 next += ETH_ALEN; 1270 } 1271 } 1272 1273 spin_lock_irqsave(&wdev->event_lock, flags); 1274 list_add_tail(&ev->list, &wdev->event_list); 1275 spin_unlock_irqrestore(&wdev->event_lock, flags); 1276 queue_work(cfg80211_wq, &rdev->event_work); 1277 1278 return; 1279 out: 1280 for_each_valid_link(info, link) 1281 cfg80211_put_bss(wdev->wiphy, info->links[link].bss); 1282 1283 } 1284 EXPORT_SYMBOL(cfg80211_roamed); 1285 1286 void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *peer_addr, 1287 const u8 *td_bitmap, u8 td_bitmap_len) 1288 { 1289 lockdep_assert_wiphy(wdev->wiphy); 1290 1291 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1292 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT && 1293 wdev->iftype != NL80211_IFTYPE_AP && 1294 wdev->iftype != NL80211_IFTYPE_P2P_GO)) 1295 return; 1296 1297 if (wdev->iftype == NL80211_IFTYPE_STATION || 1298 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { 1299 if (WARN_ON(!wdev->connected) || 1300 WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, peer_addr))) 1301 return; 1302 } 1303 1304 nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, 1305 peer_addr, td_bitmap, td_bitmap_len); 1306 } 1307 1308 void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr, 1309 const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp) 1310 { 1311 struct wireless_dev *wdev = dev->ieee80211_ptr; 1312 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1313 struct cfg80211_event *ev; 1314 unsigned long flags; 1315 1316 if (WARN_ON(!peer_addr)) 1317 return; 1318 1319 ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp); 1320 if (!ev) 1321 return; 1322 1323 ev->type = EVENT_PORT_AUTHORIZED; 1324 memcpy(ev->pa.peer_addr, peer_addr, ETH_ALEN); 1325 ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev); 1326 ev->pa.td_bitmap_len = td_bitmap_len; 1327 memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len); 1328 1329 /* 1330 * Use the wdev event list so that if there are pending 1331 * connected/roamed events, they will be reported first. 1332 */ 1333 spin_lock_irqsave(&wdev->event_lock, flags); 1334 list_add_tail(&ev->list, &wdev->event_list); 1335 spin_unlock_irqrestore(&wdev->event_lock, flags); 1336 queue_work(cfg80211_wq, &rdev->event_work); 1337 } 1338 EXPORT_SYMBOL(cfg80211_port_authorized); 1339 1340 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 1341 size_t ie_len, u16 reason, bool from_ap) 1342 { 1343 struct wireless_dev *wdev = dev->ieee80211_ptr; 1344 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1345 int i; 1346 #ifdef CONFIG_CFG80211_WEXT 1347 union iwreq_data wrqu; 1348 #endif 1349 1350 lockdep_assert_wiphy(wdev->wiphy); 1351 1352 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 1353 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 1354 return; 1355 1356 cfg80211_wdev_release_bsses(wdev); 1357 wdev->valid_links = 0; 1358 wdev->connected = false; 1359 wdev->u.client.ssid_len = 0; 1360 wdev->conn_owner_nlportid = 0; 1361 kfree_sensitive(wdev->connect_keys); 1362 wdev->connect_keys = NULL; 1363 1364 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 1365 1366 /* stop critical protocol if supported */ 1367 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 1368 rdev->crit_proto_nlportid = 0; 1369 rdev_crit_proto_stop(rdev, wdev); 1370 } 1371 1372 /* 1373 * Delete all the keys ... pairwise keys can't really 1374 * exist any more anyway, but default keys might. 1375 */ 1376 if (rdev->ops->del_key) { 1377 int max_key_idx = 5; 1378 1379 if (wiphy_ext_feature_isset( 1380 wdev->wiphy, 1381 NL80211_EXT_FEATURE_BEACON_PROTECTION) || 1382 wiphy_ext_feature_isset( 1383 wdev->wiphy, 1384 NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) 1385 max_key_idx = 7; 1386 for (i = 0; i <= max_key_idx; i++) 1387 rdev_del_key(rdev, dev, -1, i, false, NULL); 1388 } 1389 1390 rdev_set_qos_map(rdev, dev, NULL); 1391 1392 #ifdef CONFIG_CFG80211_WEXT 1393 memset(&wrqu, 0, sizeof(wrqu)); 1394 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 1395 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 1396 wdev->wext.connect.ssid_len = 0; 1397 #endif 1398 1399 schedule_work(&cfg80211_disconnect_work); 1400 1401 cfg80211_schedule_channels_check(wdev); 1402 } 1403 1404 void cfg80211_disconnected(struct net_device *dev, u16 reason, 1405 const u8 *ie, size_t ie_len, 1406 bool locally_generated, gfp_t gfp) 1407 { 1408 struct wireless_dev *wdev = dev->ieee80211_ptr; 1409 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1410 struct cfg80211_event *ev; 1411 unsigned long flags; 1412 1413 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 1414 if (!ev) 1415 return; 1416 1417 ev->type = EVENT_DISCONNECTED; 1418 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 1419 ev->dc.ie_len = ie_len; 1420 memcpy((void *)ev->dc.ie, ie, ie_len); 1421 ev->dc.reason = reason; 1422 ev->dc.locally_generated = locally_generated; 1423 1424 spin_lock_irqsave(&wdev->event_lock, flags); 1425 list_add_tail(&ev->list, &wdev->event_list); 1426 spin_unlock_irqrestore(&wdev->event_lock, flags); 1427 queue_work(cfg80211_wq, &rdev->event_work); 1428 } 1429 EXPORT_SYMBOL(cfg80211_disconnected); 1430 1431 /* 1432 * API calls for nl80211/wext compatibility code 1433 */ 1434 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1435 struct net_device *dev, 1436 struct cfg80211_connect_params *connect, 1437 struct cfg80211_cached_keys *connkeys, 1438 const u8 *prev_bssid) 1439 { 1440 struct wireless_dev *wdev = dev->ieee80211_ptr; 1441 int err; 1442 1443 lockdep_assert_wiphy(wdev->wiphy); 1444 1445 /* 1446 * If we have an ssid_len, we're trying to connect or are 1447 * already connected, so reject a new SSID unless it's the 1448 * same (which is the case for re-association.) 1449 */ 1450 if (wdev->u.client.ssid_len && 1451 (wdev->u.client.ssid_len != connect->ssid_len || 1452 memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) 1453 return -EALREADY; 1454 1455 /* 1456 * If connected, reject (re-)association unless prev_bssid 1457 * matches the current BSSID. 1458 */ 1459 if (wdev->connected) { 1460 if (!prev_bssid) 1461 return -EALREADY; 1462 if (!ether_addr_equal(prev_bssid, 1463 wdev->u.client.connected_addr)) 1464 return -ENOTCONN; 1465 } 1466 1467 /* 1468 * Reject if we're in the process of connecting with WEP, 1469 * this case isn't very interesting and trying to handle 1470 * it would make the code much more complex. 1471 */ 1472 if (wdev->connect_keys) 1473 return -EINPROGRESS; 1474 1475 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1476 rdev->wiphy.ht_capa_mod_mask); 1477 cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, 1478 rdev->wiphy.vht_capa_mod_mask); 1479 1480 if (connkeys && connkeys->def >= 0) { 1481 int idx; 1482 u32 cipher; 1483 1484 idx = connkeys->def; 1485 cipher = connkeys->params[idx].cipher; 1486 /* If given a WEP key we may need it for shared key auth */ 1487 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1488 cipher == WLAN_CIPHER_SUITE_WEP104) { 1489 connect->key_idx = idx; 1490 connect->key = connkeys->params[idx].key; 1491 connect->key_len = connkeys->params[idx].key_len; 1492 1493 /* 1494 * If ciphers are not set (e.g. when going through 1495 * iwconfig), we have to set them appropriately here. 1496 */ 1497 if (connect->crypto.cipher_group == 0) 1498 connect->crypto.cipher_group = cipher; 1499 1500 if (connect->crypto.n_ciphers_pairwise == 0) { 1501 connect->crypto.n_ciphers_pairwise = 1; 1502 connect->crypto.ciphers_pairwise[0] = cipher; 1503 } 1504 } 1505 } else { 1506 if (WARN_ON(connkeys)) 1507 return -EINVAL; 1508 1509 /* connect can point to wdev->wext.connect which 1510 * can hold key data from a previous connection 1511 */ 1512 connect->key = NULL; 1513 connect->key_len = 0; 1514 connect->key_idx = 0; 1515 } 1516 1517 wdev->connect_keys = connkeys; 1518 memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); 1519 wdev->u.client.ssid_len = connect->ssid_len; 1520 1521 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1522 IEEE80211_BSS_TYPE_ESS; 1523 1524 if (!rdev->ops->connect) 1525 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1526 else 1527 err = rdev_connect(rdev, dev, connect); 1528 1529 if (err) { 1530 wdev->connect_keys = NULL; 1531 /* 1532 * This could be reassoc getting refused, don't clear 1533 * ssid_len in that case. 1534 */ 1535 if (!wdev->connected) 1536 wdev->u.client.ssid_len = 0; 1537 return err; 1538 } 1539 1540 return 0; 1541 } 1542 1543 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1544 struct net_device *dev, u16 reason, bool wextev) 1545 { 1546 struct wireless_dev *wdev = dev->ieee80211_ptr; 1547 int err = 0; 1548 1549 lockdep_assert_wiphy(wdev->wiphy); 1550 1551 kfree_sensitive(wdev->connect_keys); 1552 wdev->connect_keys = NULL; 1553 1554 wdev->conn_owner_nlportid = 0; 1555 1556 if (wdev->conn) 1557 err = cfg80211_sme_disconnect(wdev, reason); 1558 else if (!rdev->ops->disconnect) 1559 cfg80211_mlme_down(rdev, dev); 1560 else if (wdev->u.client.ssid_len) 1561 err = rdev_disconnect(rdev, dev, reason); 1562 1563 /* 1564 * Clear ssid_len unless we actually were fully connected, 1565 * in which case cfg80211_disconnected() will take care of 1566 * this later. 1567 */ 1568 if (!wdev->connected) 1569 wdev->u.client.ssid_len = 0; 1570 1571 return err; 1572 } 1573 1574 /* 1575 * Used to clean up after the connection / connection attempt owner socket 1576 * disconnects 1577 */ 1578 void cfg80211_autodisconnect_wk(struct work_struct *work) 1579 { 1580 struct wireless_dev *wdev = 1581 container_of(work, struct wireless_dev, disconnect_wk); 1582 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 1583 1584 wiphy_lock(wdev->wiphy); 1585 1586 if (wdev->conn_owner_nlportid) { 1587 switch (wdev->iftype) { 1588 case NL80211_IFTYPE_ADHOC: 1589 cfg80211_leave_ibss(rdev, wdev->netdev, false); 1590 break; 1591 case NL80211_IFTYPE_AP: 1592 case NL80211_IFTYPE_P2P_GO: 1593 cfg80211_stop_ap(rdev, wdev->netdev, -1, false); 1594 break; 1595 case NL80211_IFTYPE_MESH_POINT: 1596 cfg80211_leave_mesh(rdev, wdev->netdev); 1597 break; 1598 case NL80211_IFTYPE_STATION: 1599 case NL80211_IFTYPE_P2P_CLIENT: 1600 /* 1601 * Use disconnect_bssid if still connecting and 1602 * ops->disconnect not implemented. Otherwise we can 1603 * use cfg80211_disconnect. 1604 */ 1605 if (rdev->ops->disconnect || wdev->connected) 1606 cfg80211_disconnect(rdev, wdev->netdev, 1607 WLAN_REASON_DEAUTH_LEAVING, 1608 true); 1609 else 1610 cfg80211_mlme_deauth(rdev, wdev->netdev, 1611 wdev->disconnect_bssid, 1612 NULL, 0, 1613 WLAN_REASON_DEAUTH_LEAVING, 1614 false); 1615 break; 1616 default: 1617 break; 1618 } 1619 } 1620 1621 wiphy_unlock(wdev->wiphy); 1622 } 1623