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 89 if (rdev->scan_req) 90 return -EBUSY; 91 92 if (wdev->conn->params.channel) { 93 n_channels = 1; 94 } else { 95 enum ieee80211_band band; 96 n_channels = 0; 97 98 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 99 if (!wdev->wiphy->bands[band]) 100 continue; 101 n_channels += wdev->wiphy->bands[band]->n_channels; 102 } 103 } 104 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 105 sizeof(request->channels[0]) * n_channels, 106 GFP_KERNEL); 107 if (!request) 108 return -ENOMEM; 109 110 if (wdev->conn->params.channel) 111 request->channels[0] = wdev->conn->params.channel; 112 else { 113 int i = 0, j; 114 enum ieee80211_band band; 115 struct ieee80211_supported_band *bands; 116 struct ieee80211_channel *channel; 117 118 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 119 bands = wdev->wiphy->bands[band]; 120 if (!bands) 121 continue; 122 for (j = 0; j < bands->n_channels; j++) { 123 channel = &bands->channels[j]; 124 if (channel->flags & IEEE80211_CHAN_DISABLED) 125 continue; 126 request->channels[i++] = channel; 127 } 128 request->rates[band] = (1 << bands->n_bitrates) - 1; 129 } 130 n_channels = i; 131 } 132 request->n_channels = n_channels; 133 request->ssids = (void *)&request->channels[n_channels]; 134 request->n_ssids = 1; 135 136 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 137 wdev->conn->params.ssid_len); 138 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 139 140 request->wdev = wdev; 141 request->wiphy = &rdev->wiphy; 142 request->scan_start = jiffies; 143 144 rdev->scan_req = request; 145 146 err = rdev_scan(rdev, request); 147 if (!err) { 148 wdev->conn->state = CFG80211_CONN_SCANNING; 149 nl80211_send_scan_start(rdev, wdev); 150 dev_hold(wdev->netdev); 151 } else { 152 rdev->scan_req = NULL; 153 kfree(request); 154 } 155 return err; 156 } 157 158 static int cfg80211_conn_do_work(struct wireless_dev *wdev) 159 { 160 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 161 struct cfg80211_connect_params *params; 162 const u8 *prev_bssid = NULL; 163 int err; 164 165 ASSERT_WDEV_LOCK(wdev); 166 167 if (!wdev->conn) 168 return 0; 169 170 params = &wdev->conn->params; 171 172 switch (wdev->conn->state) { 173 case CFG80211_CONN_SCAN_AGAIN: 174 return cfg80211_conn_scan(wdev); 175 case CFG80211_CONN_AUTHENTICATE_NEXT: 176 BUG_ON(!rdev->ops->auth); 177 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 178 return __cfg80211_mlme_auth(rdev, wdev->netdev, 179 params->channel, params->auth_type, 180 params->bssid, 181 params->ssid, params->ssid_len, 182 NULL, 0, 183 params->key, params->key_len, 184 params->key_idx, NULL, 0); 185 case CFG80211_CONN_ASSOCIATE_NEXT: 186 BUG_ON(!rdev->ops->assoc); 187 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 188 if (wdev->conn->prev_bssid_valid) 189 prev_bssid = wdev->conn->prev_bssid; 190 err = __cfg80211_mlme_assoc(rdev, wdev->netdev, 191 params->channel, params->bssid, 192 prev_bssid, 193 params->ssid, params->ssid_len, 194 params->ie, params->ie_len, 195 false, ¶ms->crypto, 196 params->flags, ¶ms->ht_capa, 197 ¶ms->ht_capa_mask); 198 if (err) 199 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 200 NULL, 0, 201 WLAN_REASON_DEAUTH_LEAVING, 202 false); 203 return err; 204 case CFG80211_CONN_DEAUTH_ASSOC_FAIL: 205 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 206 NULL, 0, 207 WLAN_REASON_DEAUTH_LEAVING, false); 208 /* return an error so that we call __cfg80211_connect_result() */ 209 return -EINVAL; 210 default: 211 return 0; 212 } 213 } 214 215 void cfg80211_conn_work(struct work_struct *work) 216 { 217 struct cfg80211_registered_device *rdev = 218 container_of(work, struct cfg80211_registered_device, conn_work); 219 struct wireless_dev *wdev; 220 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 221 222 rtnl_lock(); 223 cfg80211_lock_rdev(rdev); 224 mutex_lock(&rdev->devlist_mtx); 225 226 list_for_each_entry(wdev, &rdev->wdev_list, list) { 227 wdev_lock(wdev); 228 if (!netif_running(wdev->netdev)) { 229 wdev_unlock(wdev); 230 continue; 231 } 232 if (wdev->sme_state != CFG80211_SME_CONNECTING) { 233 wdev_unlock(wdev); 234 continue; 235 } 236 if (wdev->conn->params.bssid) { 237 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 238 bssid = bssid_buf; 239 } 240 if (cfg80211_conn_do_work(wdev)) 241 __cfg80211_connect_result( 242 wdev->netdev, bssid, 243 NULL, 0, NULL, 0, 244 WLAN_STATUS_UNSPECIFIED_FAILURE, 245 false, NULL); 246 wdev_unlock(wdev); 247 } 248 249 mutex_unlock(&rdev->devlist_mtx); 250 cfg80211_unlock_rdev(rdev); 251 rtnl_unlock(); 252 } 253 254 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 255 { 256 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 257 struct cfg80211_bss *bss; 258 u16 capa = WLAN_CAPABILITY_ESS; 259 260 ASSERT_WDEV_LOCK(wdev); 261 262 if (wdev->conn->params.privacy) 263 capa |= WLAN_CAPABILITY_PRIVACY; 264 265 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 266 wdev->conn->params.bssid, 267 wdev->conn->params.ssid, 268 wdev->conn->params.ssid_len, 269 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 270 capa); 271 if (!bss) 272 return NULL; 273 274 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 275 wdev->conn->params.bssid = wdev->conn->bssid; 276 wdev->conn->params.channel = bss->channel; 277 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 278 schedule_work(&rdev->conn_work); 279 280 return bss; 281 } 282 283 static void __cfg80211_sme_scan_done(struct net_device *dev) 284 { 285 struct wireless_dev *wdev = dev->ieee80211_ptr; 286 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 287 struct cfg80211_bss *bss; 288 289 ASSERT_WDEV_LOCK(wdev); 290 291 if (wdev->sme_state != CFG80211_SME_CONNECTING) 292 return; 293 294 if (!wdev->conn) 295 return; 296 297 if (wdev->conn->state != CFG80211_CONN_SCANNING && 298 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 299 return; 300 301 bss = cfg80211_get_conn_bss(wdev); 302 if (bss) { 303 cfg80211_put_bss(bss); 304 } else { 305 /* not found */ 306 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) 307 schedule_work(&rdev->conn_work); 308 else 309 __cfg80211_connect_result( 310 wdev->netdev, 311 wdev->conn->params.bssid, 312 NULL, 0, NULL, 0, 313 WLAN_STATUS_UNSPECIFIED_FAILURE, 314 false, NULL); 315 } 316 } 317 318 void cfg80211_sme_scan_done(struct net_device *dev) 319 { 320 struct wireless_dev *wdev = dev->ieee80211_ptr; 321 322 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); 323 wdev_lock(wdev); 324 __cfg80211_sme_scan_done(dev); 325 wdev_unlock(wdev); 326 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); 327 } 328 329 void cfg80211_sme_rx_auth(struct net_device *dev, 330 const u8 *buf, size_t len) 331 { 332 struct wireless_dev *wdev = dev->ieee80211_ptr; 333 struct wiphy *wiphy = wdev->wiphy; 334 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 335 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 336 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 337 338 ASSERT_WDEV_LOCK(wdev); 339 340 /* should only RX auth frames when connecting */ 341 if (wdev->sme_state != CFG80211_SME_CONNECTING) 342 return; 343 344 if (WARN_ON(!wdev->conn)) 345 return; 346 347 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 348 wdev->conn->auto_auth && 349 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 350 /* select automatically between only open, shared, leap */ 351 switch (wdev->conn->params.auth_type) { 352 case NL80211_AUTHTYPE_OPEN_SYSTEM: 353 if (wdev->connect_keys) 354 wdev->conn->params.auth_type = 355 NL80211_AUTHTYPE_SHARED_KEY; 356 else 357 wdev->conn->params.auth_type = 358 NL80211_AUTHTYPE_NETWORK_EAP; 359 break; 360 case NL80211_AUTHTYPE_SHARED_KEY: 361 wdev->conn->params.auth_type = 362 NL80211_AUTHTYPE_NETWORK_EAP; 363 break; 364 default: 365 /* huh? */ 366 wdev->conn->params.auth_type = 367 NL80211_AUTHTYPE_OPEN_SYSTEM; 368 break; 369 } 370 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 371 schedule_work(&rdev->conn_work); 372 } else if (status_code != WLAN_STATUS_SUCCESS) { 373 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, 374 status_code, false, NULL); 375 } else if (wdev->sme_state == CFG80211_SME_CONNECTING && 376 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 377 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 378 schedule_work(&rdev->conn_work); 379 } 380 } 381 382 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) 383 { 384 struct wiphy *wiphy = wdev->wiphy; 385 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 386 387 if (WARN_ON(!wdev->conn)) 388 return false; 389 390 if (!wdev->conn->prev_bssid_valid) 391 return false; 392 393 /* 394 * Some stupid APs don't accept reassoc, so we 395 * need to fall back to trying regular assoc. 396 */ 397 wdev->conn->prev_bssid_valid = false; 398 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 399 schedule_work(&rdev->conn_work); 400 401 return true; 402 } 403 404 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) 405 { 406 struct wiphy *wiphy = wdev->wiphy; 407 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 408 409 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; 410 schedule_work(&rdev->conn_work); 411 } 412 413 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 414 const u8 *req_ie, size_t req_ie_len, 415 const u8 *resp_ie, size_t resp_ie_len, 416 u16 status, bool wextev, 417 struct cfg80211_bss *bss) 418 { 419 struct wireless_dev *wdev = dev->ieee80211_ptr; 420 const u8 *country_ie; 421 #ifdef CONFIG_CFG80211_WEXT 422 union iwreq_data wrqu; 423 #endif 424 425 ASSERT_WDEV_LOCK(wdev); 426 427 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 428 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 429 return; 430 431 if (wdev->sme_state != CFG80211_SME_CONNECTING) 432 return; 433 434 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 435 bssid, req_ie, req_ie_len, 436 resp_ie, resp_ie_len, 437 status, GFP_KERNEL); 438 439 #ifdef CONFIG_CFG80211_WEXT 440 if (wextev) { 441 if (req_ie && status == WLAN_STATUS_SUCCESS) { 442 memset(&wrqu, 0, sizeof(wrqu)); 443 wrqu.data.length = req_ie_len; 444 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 445 } 446 447 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 448 memset(&wrqu, 0, sizeof(wrqu)); 449 wrqu.data.length = resp_ie_len; 450 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 451 } 452 453 memset(&wrqu, 0, sizeof(wrqu)); 454 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 455 if (bssid && status == WLAN_STATUS_SUCCESS) { 456 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 457 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 458 wdev->wext.prev_bssid_valid = true; 459 } 460 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 461 } 462 #endif 463 464 if (wdev->current_bss) { 465 cfg80211_unhold_bss(wdev->current_bss); 466 cfg80211_put_bss(&wdev->current_bss->pub); 467 wdev->current_bss = NULL; 468 } 469 470 if (wdev->conn) 471 wdev->conn->state = CFG80211_CONN_IDLE; 472 473 if (status != WLAN_STATUS_SUCCESS) { 474 wdev->sme_state = CFG80211_SME_IDLE; 475 if (wdev->conn) 476 kfree(wdev->conn->ie); 477 kfree(wdev->conn); 478 wdev->conn = NULL; 479 kfree(wdev->connect_keys); 480 wdev->connect_keys = NULL; 481 wdev->ssid_len = 0; 482 cfg80211_put_bss(bss); 483 return; 484 } 485 486 if (!bss) 487 bss = cfg80211_get_bss(wdev->wiphy, 488 wdev->conn ? wdev->conn->params.channel : 489 NULL, 490 bssid, 491 wdev->ssid, wdev->ssid_len, 492 WLAN_CAPABILITY_ESS, 493 WLAN_CAPABILITY_ESS); 494 495 if (WARN_ON(!bss)) 496 return; 497 498 cfg80211_hold_bss(bss_from_pub(bss)); 499 wdev->current_bss = bss_from_pub(bss); 500 501 wdev->sme_state = CFG80211_SME_CONNECTED; 502 cfg80211_upload_connect_keys(wdev); 503 504 rcu_read_lock(); 505 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 506 if (!country_ie) { 507 rcu_read_unlock(); 508 return; 509 } 510 511 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 512 rcu_read_unlock(); 513 514 if (!country_ie) 515 return; 516 517 /* 518 * ieee80211_bss_get_ie() ensures we can access: 519 * - country_ie + 2, the start of the country ie data, and 520 * - and country_ie[1] which is the IE length 521 */ 522 regulatory_hint_11d(wdev->wiphy, 523 bss->channel->band, 524 country_ie + 2, 525 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->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(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(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->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(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 wdev_lock(dev->ieee80211_ptr); 929 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL); 930 wdev_unlock(dev->ieee80211_ptr); 931 mutex_unlock(&rdev->devlist_mtx); 932 933 return err; 934 } 935 936 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 937 struct net_device *dev, u16 reason, bool wextev) 938 { 939 struct wireless_dev *wdev = dev->ieee80211_ptr; 940 int err; 941 942 ASSERT_WDEV_LOCK(wdev); 943 944 if (wdev->sme_state == CFG80211_SME_IDLE) 945 return -EINVAL; 946 947 kfree(wdev->connect_keys); 948 wdev->connect_keys = NULL; 949 950 if (!rdev->ops->disconnect) { 951 if (!rdev->ops->deauth) 952 return -EOPNOTSUPP; 953 954 /* was it connected by userspace SME? */ 955 if (!wdev->conn) { 956 cfg80211_mlme_down(rdev, dev); 957 return 0; 958 } 959 960 if (wdev->sme_state == CFG80211_SME_CONNECTING && 961 (wdev->conn->state == CFG80211_CONN_SCANNING || 962 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { 963 wdev->sme_state = CFG80211_SME_IDLE; 964 kfree(wdev->conn->ie); 965 kfree(wdev->conn); 966 wdev->conn = NULL; 967 wdev->ssid_len = 0; 968 return 0; 969 } 970 971 /* wdev->conn->params.bssid must be set if > SCANNING */ 972 err = __cfg80211_mlme_deauth(rdev, dev, 973 wdev->conn->params.bssid, 974 NULL, 0, reason, false); 975 if (err) 976 return err; 977 } else { 978 err = rdev_disconnect(rdev, dev, reason); 979 if (err) 980 return err; 981 } 982 983 if (wdev->sme_state == CFG80211_SME_CONNECTED) 984 __cfg80211_disconnected(dev, NULL, 0, 0, false); 985 else if (wdev->sme_state == CFG80211_SME_CONNECTING) 986 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, 987 WLAN_STATUS_UNSPECIFIED_FAILURE, 988 wextev, NULL); 989 990 return 0; 991 } 992 993 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 994 struct net_device *dev, 995 u16 reason, bool wextev) 996 { 997 int err; 998 999 wdev_lock(dev->ieee80211_ptr); 1000 err = __cfg80211_disconnect(rdev, dev, reason, wextev); 1001 wdev_unlock(dev->ieee80211_ptr); 1002 1003 return err; 1004 } 1005 1006 void cfg80211_sme_disassoc(struct net_device *dev, 1007 struct cfg80211_internal_bss *bss) 1008 { 1009 struct wireless_dev *wdev = dev->ieee80211_ptr; 1010 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 1011 u8 bssid[ETH_ALEN]; 1012 1013 ASSERT_WDEV_LOCK(wdev); 1014 1015 if (!wdev->conn) 1016 return; 1017 1018 if (wdev->conn->state == CFG80211_CONN_IDLE) 1019 return; 1020 1021 /* 1022 * Ok, so the association was made by this SME -- we don't 1023 * want it any more so deauthenticate too. 1024 */ 1025 1026 memcpy(bssid, bss->pub.bssid, ETH_ALEN); 1027 1028 __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 1029 WLAN_REASON_DEAUTH_LEAVING, false); 1030 } 1031