1 /* 2 * SME code for cfg80211's connect emulation. 3 * 4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> 5 * Copyright (C) 2009 Intel Corporation. All rights reserved. 6 */ 7 8 #include <linux/etherdevice.h> 9 #include <linux/if_arp.h> 10 #include <linux/slab.h> 11 #include <linux/workqueue.h> 12 #include <linux/wireless.h> 13 #include <linux/export.h> 14 #include <net/iw_handler.h> 15 #include <net/cfg80211.h> 16 #include <net/rtnetlink.h> 17 #include "nl80211.h" 18 #include "reg.h" 19 #include "rdev-ops.h" 20 21 struct cfg80211_conn { 22 struct cfg80211_connect_params params; 23 /* these are sub-states of the _CONNECTING sme_state */ 24 enum { 25 CFG80211_CONN_IDLE, 26 CFG80211_CONN_SCANNING, 27 CFG80211_CONN_SCAN_AGAIN, 28 CFG80211_CONN_AUTHENTICATE_NEXT, 29 CFG80211_CONN_AUTHENTICATING, 30 CFG80211_CONN_ASSOCIATE_NEXT, 31 CFG80211_CONN_ASSOCIATING, 32 CFG80211_CONN_DEAUTH_ASSOC_FAIL, 33 } state; 34 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; 35 u8 *ie; 36 size_t ie_len; 37 bool auto_auth, prev_bssid_valid; 38 }; 39 40 static bool cfg80211_is_all_idle(void) 41 { 42 struct cfg80211_registered_device *rdev; 43 struct wireless_dev *wdev; 44 bool is_all_idle = true; 45 46 mutex_lock(&cfg80211_mutex); 47 48 /* 49 * All devices must be idle as otherwise if you are actively 50 * scanning some new beacon hints could be learned and would 51 * count as new regulatory hints. 52 */ 53 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 54 cfg80211_lock_rdev(rdev); 55 list_for_each_entry(wdev, &rdev->wdev_list, list) { 56 wdev_lock(wdev); 57 if (wdev->sme_state != CFG80211_SME_IDLE) 58 is_all_idle = false; 59 wdev_unlock(wdev); 60 } 61 cfg80211_unlock_rdev(rdev); 62 } 63 64 mutex_unlock(&cfg80211_mutex); 65 66 return is_all_idle; 67 } 68 69 static void disconnect_work(struct work_struct *work) 70 { 71 if (!cfg80211_is_all_idle()) 72 return; 73 74 regulatory_hint_disconnect(); 75 } 76 77 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 78 79 static int cfg80211_conn_scan(struct wireless_dev *wdev) 80 { 81 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 82 struct cfg80211_scan_request *request; 83 int n_channels, err; 84 85 ASSERT_RTNL(); 86 ASSERT_RDEV_LOCK(rdev); 87 ASSERT_WDEV_LOCK(wdev); 88 lockdep_assert_held(&rdev->sched_scan_mtx); 89 90 if (rdev->scan_req) 91 return -EBUSY; 92 93 if (wdev->conn->params.channel) { 94 n_channels = 1; 95 } else { 96 enum ieee80211_band band; 97 n_channels = 0; 98 99 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 100 if (!wdev->wiphy->bands[band]) 101 continue; 102 n_channels += wdev->wiphy->bands[band]->n_channels; 103 } 104 } 105 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 106 sizeof(request->channels[0]) * n_channels, 107 GFP_KERNEL); 108 if (!request) 109 return -ENOMEM; 110 111 if (wdev->conn->params.channel) 112 request->channels[0] = wdev->conn->params.channel; 113 else { 114 int i = 0, j; 115 enum ieee80211_band band; 116 struct ieee80211_supported_band *bands; 117 struct ieee80211_channel *channel; 118 119 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 120 bands = wdev->wiphy->bands[band]; 121 if (!bands) 122 continue; 123 for (j = 0; j < bands->n_channels; j++) { 124 channel = &bands->channels[j]; 125 if (channel->flags & IEEE80211_CHAN_DISABLED) 126 continue; 127 request->channels[i++] = channel; 128 } 129 request->rates[band] = (1 << bands->n_bitrates) - 1; 130 } 131 n_channels = i; 132 } 133 request->n_channels = n_channels; 134 request->ssids = (void *)&request->channels[n_channels]; 135 request->n_ssids = 1; 136 137 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 138 wdev->conn->params.ssid_len); 139 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 140 141 request->wdev = wdev; 142 request->wiphy = &rdev->wiphy; 143 request->scan_start = jiffies; 144 145 rdev->scan_req = request; 146 147 err = rdev_scan(rdev, request); 148 if (!err) { 149 wdev->conn->state = CFG80211_CONN_SCANNING; 150 nl80211_send_scan_start(rdev, wdev); 151 dev_hold(wdev->netdev); 152 } else { 153 rdev->scan_req = NULL; 154 kfree(request); 155 } 156 return err; 157 } 158 159 static int cfg80211_conn_do_work(struct wireless_dev *wdev) 160 { 161 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 162 struct cfg80211_connect_params *params; 163 const u8 *prev_bssid = NULL; 164 int err; 165 166 ASSERT_WDEV_LOCK(wdev); 167 168 if (!wdev->conn) 169 return 0; 170 171 params = &wdev->conn->params; 172 173 switch (wdev->conn->state) { 174 case CFG80211_CONN_SCAN_AGAIN: 175 return cfg80211_conn_scan(wdev); 176 case CFG80211_CONN_AUTHENTICATE_NEXT: 177 BUG_ON(!rdev->ops->auth); 178 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 179 return __cfg80211_mlme_auth(rdev, wdev->netdev, 180 params->channel, params->auth_type, 181 params->bssid, 182 params->ssid, params->ssid_len, 183 NULL, 0, 184 params->key, params->key_len, 185 params->key_idx, NULL, 0); 186 case CFG80211_CONN_ASSOCIATE_NEXT: 187 BUG_ON(!rdev->ops->assoc); 188 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 189 if (wdev->conn->prev_bssid_valid) 190 prev_bssid = wdev->conn->prev_bssid; 191 err = __cfg80211_mlme_assoc(rdev, wdev->netdev, 192 params->channel, params->bssid, 193 prev_bssid, 194 params->ssid, params->ssid_len, 195 params->ie, params->ie_len, 196 params->mfp != NL80211_MFP_NO, 197 ¶ms->crypto, 198 params->flags, ¶ms->ht_capa, 199 ¶ms->ht_capa_mask); 200 if (err) 201 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 202 NULL, 0, 203 WLAN_REASON_DEAUTH_LEAVING, 204 false); 205 return err; 206 case CFG80211_CONN_DEAUTH_ASSOC_FAIL: 207 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 208 NULL, 0, 209 WLAN_REASON_DEAUTH_LEAVING, false); 210 /* return an error so that we call __cfg80211_connect_result() */ 211 return -EINVAL; 212 default: 213 return 0; 214 } 215 } 216 217 void cfg80211_conn_work(struct work_struct *work) 218 { 219 struct cfg80211_registered_device *rdev = 220 container_of(work, struct cfg80211_registered_device, conn_work); 221 struct wireless_dev *wdev; 222 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 223 224 rtnl_lock(); 225 cfg80211_lock_rdev(rdev); 226 mutex_lock(&rdev->devlist_mtx); 227 mutex_lock(&rdev->sched_scan_mtx); 228 229 list_for_each_entry(wdev, &rdev->wdev_list, list) { 230 wdev_lock(wdev); 231 if (!netif_running(wdev->netdev)) { 232 wdev_unlock(wdev); 233 continue; 234 } 235 if (wdev->sme_state != CFG80211_SME_CONNECTING) { 236 wdev_unlock(wdev); 237 continue; 238 } 239 if (wdev->conn->params.bssid) { 240 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 241 bssid = bssid_buf; 242 } 243 if (cfg80211_conn_do_work(wdev)) 244 __cfg80211_connect_result( 245 wdev->netdev, bssid, 246 NULL, 0, NULL, 0, 247 WLAN_STATUS_UNSPECIFIED_FAILURE, 248 false, NULL); 249 wdev_unlock(wdev); 250 } 251 252 mutex_unlock(&rdev->sched_scan_mtx); 253 mutex_unlock(&rdev->devlist_mtx); 254 cfg80211_unlock_rdev(rdev); 255 rtnl_unlock(); 256 } 257 258 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 259 { 260 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 261 struct cfg80211_bss *bss; 262 u16 capa = WLAN_CAPABILITY_ESS; 263 264 ASSERT_WDEV_LOCK(wdev); 265 266 if (wdev->conn->params.privacy) 267 capa |= WLAN_CAPABILITY_PRIVACY; 268 269 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 270 wdev->conn->params.bssid, 271 wdev->conn->params.ssid, 272 wdev->conn->params.ssid_len, 273 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 274 capa); 275 if (!bss) 276 return NULL; 277 278 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 279 wdev->conn->params.bssid = wdev->conn->bssid; 280 wdev->conn->params.channel = bss->channel; 281 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 282 schedule_work(&rdev->conn_work); 283 284 return bss; 285 } 286 287 static void __cfg80211_sme_scan_done(struct net_device *dev) 288 { 289 struct wireless_dev *wdev = dev->ieee80211_ptr; 290 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 291 struct cfg80211_bss *bss; 292 293 ASSERT_WDEV_LOCK(wdev); 294 295 if (wdev->sme_state != CFG80211_SME_CONNECTING) 296 return; 297 298 if (!wdev->conn) 299 return; 300 301 if (wdev->conn->state != CFG80211_CONN_SCANNING && 302 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 303 return; 304 305 bss = cfg80211_get_conn_bss(wdev); 306 if (bss) { 307 cfg80211_put_bss(&rdev->wiphy, bss); 308 } else { 309 /* not found */ 310 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) 311 schedule_work(&rdev->conn_work); 312 else 313 __cfg80211_connect_result( 314 wdev->netdev, 315 wdev->conn->params.bssid, 316 NULL, 0, NULL, 0, 317 WLAN_STATUS_UNSPECIFIED_FAILURE, 318 false, NULL); 319 } 320 } 321 322 void cfg80211_sme_scan_done(struct net_device *dev) 323 { 324 struct wireless_dev *wdev = dev->ieee80211_ptr; 325 326 wdev_lock(wdev); 327 __cfg80211_sme_scan_done(dev); 328 wdev_unlock(wdev); 329 } 330 331 void cfg80211_sme_rx_auth(struct net_device *dev, 332 const u8 *buf, size_t len) 333 { 334 struct wireless_dev *wdev = dev->ieee80211_ptr; 335 struct wiphy *wiphy = wdev->wiphy; 336 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 337 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 338 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 339 340 ASSERT_WDEV_LOCK(wdev); 341 342 /* should only RX auth frames when connecting */ 343 if (wdev->sme_state != CFG80211_SME_CONNECTING) 344 return; 345 346 if (WARN_ON(!wdev->conn)) 347 return; 348 349 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 350 wdev->conn->auto_auth && 351 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 352 /* select automatically between only open, shared, leap */ 353 switch (wdev->conn->params.auth_type) { 354 case NL80211_AUTHTYPE_OPEN_SYSTEM: 355 if (wdev->connect_keys) 356 wdev->conn->params.auth_type = 357 NL80211_AUTHTYPE_SHARED_KEY; 358 else 359 wdev->conn->params.auth_type = 360 NL80211_AUTHTYPE_NETWORK_EAP; 361 break; 362 case NL80211_AUTHTYPE_SHARED_KEY: 363 wdev->conn->params.auth_type = 364 NL80211_AUTHTYPE_NETWORK_EAP; 365 break; 366 default: 367 /* huh? */ 368 wdev->conn->params.auth_type = 369 NL80211_AUTHTYPE_OPEN_SYSTEM; 370 break; 371 } 372 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 373 schedule_work(&rdev->conn_work); 374 } else if (status_code != WLAN_STATUS_SUCCESS) { 375 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, 376 status_code, false, NULL); 377 } else if (wdev->sme_state == CFG80211_SME_CONNECTING && 378 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 379 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 380 schedule_work(&rdev->conn_work); 381 } 382 } 383 384 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) 385 { 386 struct wiphy *wiphy = wdev->wiphy; 387 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 388 389 if (WARN_ON(!wdev->conn)) 390 return false; 391 392 if (!wdev->conn->prev_bssid_valid) 393 return false; 394 395 /* 396 * Some stupid APs don't accept reassoc, so we 397 * need to fall back to trying regular assoc. 398 */ 399 wdev->conn->prev_bssid_valid = false; 400 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 401 schedule_work(&rdev->conn_work); 402 403 return true; 404 } 405 406 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) 407 { 408 struct wiphy *wiphy = wdev->wiphy; 409 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 410 411 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; 412 schedule_work(&rdev->conn_work); 413 } 414 415 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 416 const u8 *req_ie, size_t req_ie_len, 417 const u8 *resp_ie, size_t resp_ie_len, 418 u16 status, bool wextev, 419 struct cfg80211_bss *bss) 420 { 421 struct wireless_dev *wdev = dev->ieee80211_ptr; 422 const u8 *country_ie; 423 #ifdef CONFIG_CFG80211_WEXT 424 union iwreq_data wrqu; 425 #endif 426 427 ASSERT_WDEV_LOCK(wdev); 428 429 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 430 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 431 return; 432 433 if (wdev->sme_state != CFG80211_SME_CONNECTING) 434 return; 435 436 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 437 bssid, req_ie, req_ie_len, 438 resp_ie, resp_ie_len, 439 status, GFP_KERNEL); 440 441 #ifdef CONFIG_CFG80211_WEXT 442 if (wextev) { 443 if (req_ie && status == WLAN_STATUS_SUCCESS) { 444 memset(&wrqu, 0, sizeof(wrqu)); 445 wrqu.data.length = req_ie_len; 446 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 447 } 448 449 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 450 memset(&wrqu, 0, sizeof(wrqu)); 451 wrqu.data.length = resp_ie_len; 452 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 453 } 454 455 memset(&wrqu, 0, sizeof(wrqu)); 456 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 457 if (bssid && status == WLAN_STATUS_SUCCESS) { 458 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 459 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 460 wdev->wext.prev_bssid_valid = true; 461 } 462 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 463 } 464 #endif 465 466 if (wdev->current_bss) { 467 cfg80211_unhold_bss(wdev->current_bss); 468 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 469 wdev->current_bss = NULL; 470 } 471 472 if (wdev->conn) 473 wdev->conn->state = CFG80211_CONN_IDLE; 474 475 if (status != WLAN_STATUS_SUCCESS) { 476 wdev->sme_state = CFG80211_SME_IDLE; 477 if (wdev->conn) 478 kfree(wdev->conn->ie); 479 kfree(wdev->conn); 480 wdev->conn = NULL; 481 kfree(wdev->connect_keys); 482 wdev->connect_keys = NULL; 483 wdev->ssid_len = 0; 484 cfg80211_put_bss(wdev->wiphy, bss); 485 return; 486 } 487 488 if (!bss) 489 bss = cfg80211_get_bss(wdev->wiphy, 490 wdev->conn ? wdev->conn->params.channel : 491 NULL, 492 bssid, 493 wdev->ssid, wdev->ssid_len, 494 WLAN_CAPABILITY_ESS, 495 WLAN_CAPABILITY_ESS); 496 497 if (WARN_ON(!bss)) 498 return; 499 500 cfg80211_hold_bss(bss_from_pub(bss)); 501 wdev->current_bss = bss_from_pub(bss); 502 503 wdev->sme_state = CFG80211_SME_CONNECTED; 504 cfg80211_upload_connect_keys(wdev); 505 506 rcu_read_lock(); 507 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 508 if (!country_ie) { 509 rcu_read_unlock(); 510 return; 511 } 512 513 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 514 rcu_read_unlock(); 515 516 if (!country_ie) 517 return; 518 519 /* 520 * ieee80211_bss_get_ie() ensures we can access: 521 * - country_ie + 2, the start of the country ie data, and 522 * - and country_ie[1] which is the IE length 523 */ 524 regulatory_hint_11d(wdev->wiphy, bss->channel->band, 525 country_ie + 2, country_ie[1]); 526 kfree(country_ie); 527 } 528 529 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 530 const u8 *req_ie, size_t req_ie_len, 531 const u8 *resp_ie, size_t resp_ie_len, 532 u16 status, gfp_t gfp) 533 { 534 struct wireless_dev *wdev = dev->ieee80211_ptr; 535 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 536 struct cfg80211_event *ev; 537 unsigned long flags; 538 539 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); 540 541 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 542 if (!ev) 543 return; 544 545 ev->type = EVENT_CONNECT_RESULT; 546 if (bssid) 547 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 548 if (req_ie_len) { 549 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 550 ev->cr.req_ie_len = req_ie_len; 551 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 552 } 553 if (resp_ie_len) { 554 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 555 ev->cr.resp_ie_len = resp_ie_len; 556 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 557 } 558 ev->cr.status = status; 559 560 spin_lock_irqsave(&wdev->event_lock, flags); 561 list_add_tail(&ev->list, &wdev->event_list); 562 spin_unlock_irqrestore(&wdev->event_lock, flags); 563 queue_work(cfg80211_wq, &rdev->event_work); 564 } 565 EXPORT_SYMBOL(cfg80211_connect_result); 566 567 void __cfg80211_roamed(struct wireless_dev *wdev, 568 struct cfg80211_bss *bss, 569 const u8 *req_ie, size_t req_ie_len, 570 const u8 *resp_ie, size_t resp_ie_len) 571 { 572 #ifdef CONFIG_CFG80211_WEXT 573 union iwreq_data wrqu; 574 #endif 575 ASSERT_WDEV_LOCK(wdev); 576 577 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 578 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 579 goto out; 580 581 if (wdev->sme_state != CFG80211_SME_CONNECTED) 582 goto out; 583 584 /* internal error -- how did we get to CONNECTED w/o BSS? */ 585 if (WARN_ON(!wdev->current_bss)) { 586 goto out; 587 } 588 589 cfg80211_unhold_bss(wdev->current_bss); 590 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 591 wdev->current_bss = NULL; 592 593 cfg80211_hold_bss(bss_from_pub(bss)); 594 wdev->current_bss = bss_from_pub(bss); 595 596 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 597 req_ie, req_ie_len, resp_ie, resp_ie_len, 598 GFP_KERNEL); 599 600 #ifdef CONFIG_CFG80211_WEXT 601 if (req_ie) { 602 memset(&wrqu, 0, sizeof(wrqu)); 603 wrqu.data.length = req_ie_len; 604 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 605 &wrqu, req_ie); 606 } 607 608 if (resp_ie) { 609 memset(&wrqu, 0, sizeof(wrqu)); 610 wrqu.data.length = resp_ie_len; 611 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 612 &wrqu, resp_ie); 613 } 614 615 memset(&wrqu, 0, sizeof(wrqu)); 616 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 617 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 618 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 619 wdev->wext.prev_bssid_valid = true; 620 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 621 #endif 622 623 return; 624 out: 625 cfg80211_put_bss(wdev->wiphy, bss); 626 } 627 628 void cfg80211_roamed(struct net_device *dev, 629 struct ieee80211_channel *channel, 630 const u8 *bssid, 631 const u8 *req_ie, size_t req_ie_len, 632 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 633 { 634 struct wireless_dev *wdev = dev->ieee80211_ptr; 635 struct cfg80211_bss *bss; 636 637 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 638 639 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 640 wdev->ssid_len, WLAN_CAPABILITY_ESS, 641 WLAN_CAPABILITY_ESS); 642 if (WARN_ON(!bss)) 643 return; 644 645 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 646 resp_ie_len, gfp); 647 } 648 EXPORT_SYMBOL(cfg80211_roamed); 649 650 void cfg80211_roamed_bss(struct net_device *dev, 651 struct cfg80211_bss *bss, const u8 *req_ie, 652 size_t req_ie_len, const u8 *resp_ie, 653 size_t resp_ie_len, gfp_t gfp) 654 { 655 struct wireless_dev *wdev = dev->ieee80211_ptr; 656 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 657 struct cfg80211_event *ev; 658 unsigned long flags; 659 660 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 661 662 if (WARN_ON(!bss)) 663 return; 664 665 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 666 if (!ev) { 667 cfg80211_put_bss(wdev->wiphy, bss); 668 return; 669 } 670 671 ev->type = EVENT_ROAMED; 672 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 673 ev->rm.req_ie_len = req_ie_len; 674 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 675 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 676 ev->rm.resp_ie_len = resp_ie_len; 677 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 678 ev->rm.bss = bss; 679 680 spin_lock_irqsave(&wdev->event_lock, flags); 681 list_add_tail(&ev->list, &wdev->event_list); 682 spin_unlock_irqrestore(&wdev->event_lock, flags); 683 queue_work(cfg80211_wq, &rdev->event_work); 684 } 685 EXPORT_SYMBOL(cfg80211_roamed_bss); 686 687 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 688 size_t ie_len, u16 reason, bool from_ap) 689 { 690 struct wireless_dev *wdev = dev->ieee80211_ptr; 691 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 692 int i; 693 #ifdef CONFIG_CFG80211_WEXT 694 union iwreq_data wrqu; 695 #endif 696 697 ASSERT_WDEV_LOCK(wdev); 698 699 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 700 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 701 return; 702 703 if (wdev->sme_state != CFG80211_SME_CONNECTED) 704 return; 705 706 if (wdev->current_bss) { 707 cfg80211_unhold_bss(wdev->current_bss); 708 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 709 } 710 711 wdev->current_bss = NULL; 712 wdev->sme_state = CFG80211_SME_IDLE; 713 wdev->ssid_len = 0; 714 715 if (wdev->conn) { 716 kfree(wdev->conn->ie); 717 wdev->conn->ie = NULL; 718 kfree(wdev->conn); 719 wdev->conn = NULL; 720 } 721 722 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 723 724 /* 725 * Delete all the keys ... pairwise keys can't really 726 * exist any more anyway, but default keys might. 727 */ 728 if (rdev->ops->del_key) 729 for (i = 0; i < 6; i++) 730 rdev_del_key(rdev, dev, i, false, NULL); 731 732 #ifdef CONFIG_CFG80211_WEXT 733 memset(&wrqu, 0, sizeof(wrqu)); 734 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 735 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 736 wdev->wext.connect.ssid_len = 0; 737 #endif 738 739 schedule_work(&cfg80211_disconnect_work); 740 } 741 742 void cfg80211_disconnected(struct net_device *dev, u16 reason, 743 u8 *ie, size_t ie_len, gfp_t gfp) 744 { 745 struct wireless_dev *wdev = dev->ieee80211_ptr; 746 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 747 struct cfg80211_event *ev; 748 unsigned long flags; 749 750 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 751 752 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 753 if (!ev) 754 return; 755 756 ev->type = EVENT_DISCONNECTED; 757 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 758 ev->dc.ie_len = ie_len; 759 memcpy((void *)ev->dc.ie, ie, ie_len); 760 ev->dc.reason = reason; 761 762 spin_lock_irqsave(&wdev->event_lock, flags); 763 list_add_tail(&ev->list, &wdev->event_list); 764 spin_unlock_irqrestore(&wdev->event_lock, flags); 765 queue_work(cfg80211_wq, &rdev->event_work); 766 } 767 EXPORT_SYMBOL(cfg80211_disconnected); 768 769 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 770 struct net_device *dev, 771 struct cfg80211_connect_params *connect, 772 struct cfg80211_cached_keys *connkeys, 773 const u8 *prev_bssid) 774 { 775 struct wireless_dev *wdev = dev->ieee80211_ptr; 776 struct cfg80211_bss *bss = NULL; 777 int err; 778 779 ASSERT_WDEV_LOCK(wdev); 780 781 if (wdev->sme_state != CFG80211_SME_IDLE) 782 return -EALREADY; 783 784 if (WARN_ON(wdev->connect_keys)) { 785 kfree(wdev->connect_keys); 786 wdev->connect_keys = NULL; 787 } 788 789 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 790 rdev->wiphy.ht_capa_mod_mask); 791 792 if (connkeys && connkeys->def >= 0) { 793 int idx; 794 u32 cipher; 795 796 idx = connkeys->def; 797 cipher = connkeys->params[idx].cipher; 798 /* If given a WEP key we may need it for shared key auth */ 799 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 800 cipher == WLAN_CIPHER_SUITE_WEP104) { 801 connect->key_idx = idx; 802 connect->key = connkeys->params[idx].key; 803 connect->key_len = connkeys->params[idx].key_len; 804 805 /* 806 * If ciphers are not set (e.g. when going through 807 * iwconfig), we have to set them appropriately here. 808 */ 809 if (connect->crypto.cipher_group == 0) 810 connect->crypto.cipher_group = cipher; 811 812 if (connect->crypto.n_ciphers_pairwise == 0) { 813 connect->crypto.n_ciphers_pairwise = 1; 814 connect->crypto.ciphers_pairwise[0] = cipher; 815 } 816 } 817 } 818 819 if (!rdev->ops->connect) { 820 if (!rdev->ops->auth || !rdev->ops->assoc) 821 return -EOPNOTSUPP; 822 823 if (WARN_ON(wdev->conn)) 824 return -EINPROGRESS; 825 826 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 827 if (!wdev->conn) 828 return -ENOMEM; 829 830 /* 831 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 832 */ 833 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 834 if (connect->bssid) { 835 wdev->conn->params.bssid = wdev->conn->bssid; 836 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 837 } 838 839 if (connect->ie) { 840 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 841 GFP_KERNEL); 842 wdev->conn->params.ie = wdev->conn->ie; 843 if (!wdev->conn->ie) { 844 kfree(wdev->conn); 845 wdev->conn = NULL; 846 return -ENOMEM; 847 } 848 } 849 850 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 851 wdev->conn->auto_auth = true; 852 /* start with open system ... should mostly work */ 853 wdev->conn->params.auth_type = 854 NL80211_AUTHTYPE_OPEN_SYSTEM; 855 } else { 856 wdev->conn->auto_auth = false; 857 } 858 859 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 860 wdev->ssid_len = connect->ssid_len; 861 wdev->conn->params.ssid = wdev->ssid; 862 wdev->conn->params.ssid_len = connect->ssid_len; 863 864 /* see if we have the bss already */ 865 bss = cfg80211_get_conn_bss(wdev); 866 867 wdev->sme_state = CFG80211_SME_CONNECTING; 868 wdev->connect_keys = connkeys; 869 870 if (prev_bssid) { 871 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 872 wdev->conn->prev_bssid_valid = true; 873 } 874 875 /* we're good if we have a matching bss struct */ 876 if (bss) { 877 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 878 err = cfg80211_conn_do_work(wdev); 879 cfg80211_put_bss(wdev->wiphy, bss); 880 } else { 881 /* otherwise we'll need to scan for the AP first */ 882 err = cfg80211_conn_scan(wdev); 883 /* 884 * If we can't scan right now, then we need to scan again 885 * after the current scan finished, since the parameters 886 * changed (unless we find a good AP anyway). 887 */ 888 if (err == -EBUSY) { 889 err = 0; 890 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 891 } 892 } 893 if (err) { 894 kfree(wdev->conn->ie); 895 kfree(wdev->conn); 896 wdev->conn = NULL; 897 wdev->sme_state = CFG80211_SME_IDLE; 898 wdev->connect_keys = NULL; 899 wdev->ssid_len = 0; 900 } 901 902 return err; 903 } else { 904 wdev->sme_state = CFG80211_SME_CONNECTING; 905 wdev->connect_keys = connkeys; 906 err = rdev_connect(rdev, dev, connect); 907 if (err) { 908 wdev->connect_keys = NULL; 909 wdev->sme_state = CFG80211_SME_IDLE; 910 return err; 911 } 912 913 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 914 wdev->ssid_len = connect->ssid_len; 915 916 return 0; 917 } 918 } 919 920 int cfg80211_connect(struct cfg80211_registered_device *rdev, 921 struct net_device *dev, 922 struct cfg80211_connect_params *connect, 923 struct cfg80211_cached_keys *connkeys) 924 { 925 int err; 926 927 mutex_lock(&rdev->devlist_mtx); 928 /* might request scan - scan_mtx -> wdev_mtx dependency */ 929 mutex_lock(&rdev->sched_scan_mtx); 930 wdev_lock(dev->ieee80211_ptr); 931 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL); 932 wdev_unlock(dev->ieee80211_ptr); 933 mutex_unlock(&rdev->sched_scan_mtx); 934 mutex_unlock(&rdev->devlist_mtx); 935 936 return err; 937 } 938 939 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 940 struct net_device *dev, u16 reason, bool wextev) 941 { 942 struct wireless_dev *wdev = dev->ieee80211_ptr; 943 int err; 944 945 ASSERT_WDEV_LOCK(wdev); 946 947 if (wdev->sme_state == CFG80211_SME_IDLE) 948 return -EINVAL; 949 950 kfree(wdev->connect_keys); 951 wdev->connect_keys = NULL; 952 953 if (!rdev->ops->disconnect) { 954 if (!rdev->ops->deauth) 955 return -EOPNOTSUPP; 956 957 /* was it connected by userspace SME? */ 958 if (!wdev->conn) { 959 cfg80211_mlme_down(rdev, dev); 960 return 0; 961 } 962 963 if (wdev->sme_state == CFG80211_SME_CONNECTING && 964 (wdev->conn->state == CFG80211_CONN_SCANNING || 965 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { 966 wdev->sme_state = CFG80211_SME_IDLE; 967 kfree(wdev->conn->ie); 968 kfree(wdev->conn); 969 wdev->conn = NULL; 970 wdev->ssid_len = 0; 971 return 0; 972 } 973 974 /* wdev->conn->params.bssid must be set if > SCANNING */ 975 err = __cfg80211_mlme_deauth(rdev, dev, 976 wdev->conn->params.bssid, 977 NULL, 0, reason, false); 978 if (err) 979 return err; 980 } else { 981 err = rdev_disconnect(rdev, dev, reason); 982 if (err) 983 return err; 984 } 985 986 if (wdev->sme_state == CFG80211_SME_CONNECTED) 987 __cfg80211_disconnected(dev, NULL, 0, 0, false); 988 else if (wdev->sme_state == CFG80211_SME_CONNECTING) 989 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, 990 WLAN_STATUS_UNSPECIFIED_FAILURE, 991 wextev, NULL); 992 993 return 0; 994 } 995 996 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 997 struct net_device *dev, 998 u16 reason, bool wextev) 999 { 1000 int err; 1001 1002 wdev_lock(dev->ieee80211_ptr); 1003 err = __cfg80211_disconnect(rdev, dev, reason, wextev); 1004 wdev_unlock(dev->ieee80211_ptr); 1005 1006 return err; 1007 } 1008 1009 void cfg80211_sme_disassoc(struct net_device *dev, 1010 struct cfg80211_internal_bss *bss) 1011 { 1012 struct wireless_dev *wdev = dev->ieee80211_ptr; 1013 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 1014 u8 bssid[ETH_ALEN]; 1015 1016 ASSERT_WDEV_LOCK(wdev); 1017 1018 if (!wdev->conn) 1019 return; 1020 1021 if (wdev->conn->state == CFG80211_CONN_IDLE) 1022 return; 1023 1024 /* 1025 * Ok, so the association was made by this SME -- we don't 1026 * want it any more so deauthenticate too. 1027 */ 1028 1029 memcpy(bssid, bss->pub.bssid, ETH_ALEN); 1030 1031 __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 1032 WLAN_REASON_DEAUTH_LEAVING, false); 1033 } 1034