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