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 struct cfg80211_assoc_request req = {}; 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 req.prev_bssid = wdev->conn->prev_bssid; 191 req.ie = params->ie; 192 req.ie_len = params->ie_len; 193 req.use_mfp = params->mfp != NL80211_MFP_NO; 194 req.crypto = params->crypto; 195 req.flags = params->flags; 196 req.ht_capa = params->ht_capa; 197 req.ht_capa_mask = params->ht_capa_mask; 198 req.vht_capa = params->vht_capa; 199 req.vht_capa_mask = params->vht_capa_mask; 200 201 err = __cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 202 params->bssid, params->ssid, 203 params->ssid_len, &req); 204 if (err) 205 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 206 NULL, 0, 207 WLAN_REASON_DEAUTH_LEAVING, 208 false); 209 return err; 210 case CFG80211_CONN_DEAUTH_ASSOC_FAIL: 211 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 212 NULL, 0, 213 WLAN_REASON_DEAUTH_LEAVING, false); 214 /* return an error so that we call __cfg80211_connect_result() */ 215 return -EINVAL; 216 default: 217 return 0; 218 } 219 } 220 221 void cfg80211_conn_work(struct work_struct *work) 222 { 223 struct cfg80211_registered_device *rdev = 224 container_of(work, struct cfg80211_registered_device, conn_work); 225 struct wireless_dev *wdev; 226 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 227 228 rtnl_lock(); 229 cfg80211_lock_rdev(rdev); 230 mutex_lock(&rdev->devlist_mtx); 231 mutex_lock(&rdev->sched_scan_mtx); 232 233 list_for_each_entry(wdev, &rdev->wdev_list, list) { 234 wdev_lock(wdev); 235 if (!netif_running(wdev->netdev)) { 236 wdev_unlock(wdev); 237 continue; 238 } 239 if (wdev->sme_state != CFG80211_SME_CONNECTING || !wdev->conn) { 240 wdev_unlock(wdev); 241 continue; 242 } 243 if (wdev->conn->params.bssid) { 244 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 245 bssid = bssid_buf; 246 } 247 if (cfg80211_conn_do_work(wdev)) 248 __cfg80211_connect_result( 249 wdev->netdev, bssid, 250 NULL, 0, NULL, 0, 251 WLAN_STATUS_UNSPECIFIED_FAILURE, 252 false, NULL); 253 wdev_unlock(wdev); 254 } 255 256 mutex_unlock(&rdev->sched_scan_mtx); 257 mutex_unlock(&rdev->devlist_mtx); 258 cfg80211_unlock_rdev(rdev); 259 rtnl_unlock(); 260 } 261 262 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 263 { 264 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 265 struct cfg80211_bss *bss; 266 u16 capa = WLAN_CAPABILITY_ESS; 267 268 ASSERT_WDEV_LOCK(wdev); 269 270 if (wdev->conn->params.privacy) 271 capa |= WLAN_CAPABILITY_PRIVACY; 272 273 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 274 wdev->conn->params.bssid, 275 wdev->conn->params.ssid, 276 wdev->conn->params.ssid_len, 277 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 278 capa); 279 if (!bss) 280 return NULL; 281 282 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 283 wdev->conn->params.bssid = wdev->conn->bssid; 284 wdev->conn->params.channel = bss->channel; 285 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 286 schedule_work(&rdev->conn_work); 287 288 return bss; 289 } 290 291 static void __cfg80211_sme_scan_done(struct net_device *dev) 292 { 293 struct wireless_dev *wdev = dev->ieee80211_ptr; 294 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 295 struct cfg80211_bss *bss; 296 297 ASSERT_WDEV_LOCK(wdev); 298 299 if (wdev->sme_state != CFG80211_SME_CONNECTING) 300 return; 301 302 if (!wdev->conn) 303 return; 304 305 if (wdev->conn->state != CFG80211_CONN_SCANNING && 306 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 307 return; 308 309 bss = cfg80211_get_conn_bss(wdev); 310 if (bss) { 311 cfg80211_put_bss(&rdev->wiphy, bss); 312 } else { 313 /* not found */ 314 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) 315 schedule_work(&rdev->conn_work); 316 else 317 __cfg80211_connect_result( 318 wdev->netdev, 319 wdev->conn->params.bssid, 320 NULL, 0, NULL, 0, 321 WLAN_STATUS_UNSPECIFIED_FAILURE, 322 false, NULL); 323 } 324 } 325 326 void cfg80211_sme_scan_done(struct net_device *dev) 327 { 328 struct wireless_dev *wdev = dev->ieee80211_ptr; 329 330 wdev_lock(wdev); 331 __cfg80211_sme_scan_done(dev); 332 wdev_unlock(wdev); 333 } 334 335 void cfg80211_sme_rx_auth(struct net_device *dev, 336 const u8 *buf, size_t len) 337 { 338 struct wireless_dev *wdev = dev->ieee80211_ptr; 339 struct wiphy *wiphy = wdev->wiphy; 340 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 341 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 342 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 343 344 ASSERT_WDEV_LOCK(wdev); 345 346 /* should only RX auth frames when connecting */ 347 if (wdev->sme_state != CFG80211_SME_CONNECTING) 348 return; 349 350 if (WARN_ON(!wdev->conn)) 351 return; 352 353 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 354 wdev->conn->auto_auth && 355 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 356 /* select automatically between only open, shared, leap */ 357 switch (wdev->conn->params.auth_type) { 358 case NL80211_AUTHTYPE_OPEN_SYSTEM: 359 if (wdev->connect_keys) 360 wdev->conn->params.auth_type = 361 NL80211_AUTHTYPE_SHARED_KEY; 362 else 363 wdev->conn->params.auth_type = 364 NL80211_AUTHTYPE_NETWORK_EAP; 365 break; 366 case NL80211_AUTHTYPE_SHARED_KEY: 367 wdev->conn->params.auth_type = 368 NL80211_AUTHTYPE_NETWORK_EAP; 369 break; 370 default: 371 /* huh? */ 372 wdev->conn->params.auth_type = 373 NL80211_AUTHTYPE_OPEN_SYSTEM; 374 break; 375 } 376 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 377 schedule_work(&rdev->conn_work); 378 } else if (status_code != WLAN_STATUS_SUCCESS) { 379 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, 380 status_code, false, NULL); 381 } else if (wdev->sme_state == CFG80211_SME_CONNECTING && 382 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 383 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 384 schedule_work(&rdev->conn_work); 385 } 386 } 387 388 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) 389 { 390 struct wiphy *wiphy = wdev->wiphy; 391 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 392 393 if (WARN_ON(!wdev->conn)) 394 return false; 395 396 if (!wdev->conn->prev_bssid_valid) 397 return false; 398 399 /* 400 * Some stupid APs don't accept reassoc, so we 401 * need to fall back to trying regular assoc. 402 */ 403 wdev->conn->prev_bssid_valid = false; 404 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 405 schedule_work(&rdev->conn_work); 406 407 return true; 408 } 409 410 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) 411 { 412 struct wiphy *wiphy = wdev->wiphy; 413 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 414 415 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; 416 schedule_work(&rdev->conn_work); 417 } 418 419 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 420 const u8 *req_ie, size_t req_ie_len, 421 const u8 *resp_ie, size_t resp_ie_len, 422 u16 status, bool wextev, 423 struct cfg80211_bss *bss) 424 { 425 struct wireless_dev *wdev = dev->ieee80211_ptr; 426 const u8 *country_ie; 427 #ifdef CONFIG_CFG80211_WEXT 428 union iwreq_data wrqu; 429 #endif 430 431 ASSERT_WDEV_LOCK(wdev); 432 433 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 434 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 435 return; 436 437 if (wdev->sme_state != CFG80211_SME_CONNECTING) 438 return; 439 440 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 441 bssid, req_ie, req_ie_len, 442 resp_ie, resp_ie_len, 443 status, GFP_KERNEL); 444 445 #ifdef CONFIG_CFG80211_WEXT 446 if (wextev) { 447 if (req_ie && status == WLAN_STATUS_SUCCESS) { 448 memset(&wrqu, 0, sizeof(wrqu)); 449 wrqu.data.length = req_ie_len; 450 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 451 } 452 453 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 454 memset(&wrqu, 0, sizeof(wrqu)); 455 wrqu.data.length = resp_ie_len; 456 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 457 } 458 459 memset(&wrqu, 0, sizeof(wrqu)); 460 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 461 if (bssid && status == WLAN_STATUS_SUCCESS) { 462 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 463 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 464 wdev->wext.prev_bssid_valid = true; 465 } 466 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 467 } 468 #endif 469 470 if (wdev->current_bss) { 471 cfg80211_unhold_bss(wdev->current_bss); 472 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 473 wdev->current_bss = NULL; 474 } 475 476 if (wdev->conn) 477 wdev->conn->state = CFG80211_CONN_IDLE; 478 479 if (status != WLAN_STATUS_SUCCESS) { 480 wdev->sme_state = CFG80211_SME_IDLE; 481 if (wdev->conn) 482 kfree(wdev->conn->ie); 483 kfree(wdev->conn); 484 wdev->conn = NULL; 485 kfree(wdev->connect_keys); 486 wdev->connect_keys = NULL; 487 wdev->ssid_len = 0; 488 cfg80211_put_bss(wdev->wiphy, bss); 489 return; 490 } 491 492 if (!bss) 493 bss = cfg80211_get_bss(wdev->wiphy, 494 wdev->conn ? wdev->conn->params.channel : 495 NULL, 496 bssid, 497 wdev->ssid, wdev->ssid_len, 498 WLAN_CAPABILITY_ESS, 499 WLAN_CAPABILITY_ESS); 500 501 if (WARN_ON(!bss)) 502 return; 503 504 cfg80211_hold_bss(bss_from_pub(bss)); 505 wdev->current_bss = bss_from_pub(bss); 506 507 wdev->sme_state = CFG80211_SME_CONNECTED; 508 cfg80211_upload_connect_keys(wdev); 509 510 rcu_read_lock(); 511 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 512 if (!country_ie) { 513 rcu_read_unlock(); 514 return; 515 } 516 517 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 518 rcu_read_unlock(); 519 520 if (!country_ie) 521 return; 522 523 /* 524 * ieee80211_bss_get_ie() ensures we can access: 525 * - country_ie + 2, the start of the country ie data, and 526 * - and country_ie[1] which is the IE length 527 */ 528 regulatory_hint_11d(wdev->wiphy, bss->channel->band, 529 country_ie + 2, country_ie[1]); 530 kfree(country_ie); 531 } 532 533 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 534 const u8 *req_ie, size_t req_ie_len, 535 const u8 *resp_ie, size_t resp_ie_len, 536 u16 status, gfp_t gfp) 537 { 538 struct wireless_dev *wdev = dev->ieee80211_ptr; 539 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 540 struct cfg80211_event *ev; 541 unsigned long flags; 542 543 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); 544 545 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 546 if (!ev) 547 return; 548 549 ev->type = EVENT_CONNECT_RESULT; 550 if (bssid) 551 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 552 if (req_ie_len) { 553 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 554 ev->cr.req_ie_len = req_ie_len; 555 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 556 } 557 if (resp_ie_len) { 558 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 559 ev->cr.resp_ie_len = resp_ie_len; 560 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 561 } 562 ev->cr.status = status; 563 564 spin_lock_irqsave(&wdev->event_lock, flags); 565 list_add_tail(&ev->list, &wdev->event_list); 566 spin_unlock_irqrestore(&wdev->event_lock, flags); 567 queue_work(cfg80211_wq, &rdev->event_work); 568 } 569 EXPORT_SYMBOL(cfg80211_connect_result); 570 571 void __cfg80211_roamed(struct wireless_dev *wdev, 572 struct cfg80211_bss *bss, 573 const u8 *req_ie, size_t req_ie_len, 574 const u8 *resp_ie, size_t resp_ie_len) 575 { 576 #ifdef CONFIG_CFG80211_WEXT 577 union iwreq_data wrqu; 578 #endif 579 ASSERT_WDEV_LOCK(wdev); 580 581 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 582 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 583 goto out; 584 585 if (wdev->sme_state != CFG80211_SME_CONNECTED) 586 goto out; 587 588 /* internal error -- how did we get to CONNECTED w/o BSS? */ 589 if (WARN_ON(!wdev->current_bss)) { 590 goto out; 591 } 592 593 cfg80211_unhold_bss(wdev->current_bss); 594 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 595 wdev->current_bss = NULL; 596 597 cfg80211_hold_bss(bss_from_pub(bss)); 598 wdev->current_bss = bss_from_pub(bss); 599 600 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 601 req_ie, req_ie_len, resp_ie, resp_ie_len, 602 GFP_KERNEL); 603 604 #ifdef CONFIG_CFG80211_WEXT 605 if (req_ie) { 606 memset(&wrqu, 0, sizeof(wrqu)); 607 wrqu.data.length = req_ie_len; 608 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 609 &wrqu, req_ie); 610 } 611 612 if (resp_ie) { 613 memset(&wrqu, 0, sizeof(wrqu)); 614 wrqu.data.length = resp_ie_len; 615 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 616 &wrqu, resp_ie); 617 } 618 619 memset(&wrqu, 0, sizeof(wrqu)); 620 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 621 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 622 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 623 wdev->wext.prev_bssid_valid = true; 624 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 625 #endif 626 627 return; 628 out: 629 cfg80211_put_bss(wdev->wiphy, bss); 630 } 631 632 void cfg80211_roamed(struct net_device *dev, 633 struct ieee80211_channel *channel, 634 const u8 *bssid, 635 const u8 *req_ie, size_t req_ie_len, 636 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 637 { 638 struct wireless_dev *wdev = dev->ieee80211_ptr; 639 struct cfg80211_bss *bss; 640 641 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 642 643 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 644 wdev->ssid_len, WLAN_CAPABILITY_ESS, 645 WLAN_CAPABILITY_ESS); 646 if (WARN_ON(!bss)) 647 return; 648 649 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 650 resp_ie_len, gfp); 651 } 652 EXPORT_SYMBOL(cfg80211_roamed); 653 654 void cfg80211_roamed_bss(struct net_device *dev, 655 struct cfg80211_bss *bss, const u8 *req_ie, 656 size_t req_ie_len, const u8 *resp_ie, 657 size_t resp_ie_len, gfp_t gfp) 658 { 659 struct wireless_dev *wdev = dev->ieee80211_ptr; 660 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 661 struct cfg80211_event *ev; 662 unsigned long flags; 663 664 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 665 666 if (WARN_ON(!bss)) 667 return; 668 669 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 670 if (!ev) { 671 cfg80211_put_bss(wdev->wiphy, bss); 672 return; 673 } 674 675 ev->type = EVENT_ROAMED; 676 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 677 ev->rm.req_ie_len = req_ie_len; 678 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 679 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 680 ev->rm.resp_ie_len = resp_ie_len; 681 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 682 ev->rm.bss = bss; 683 684 spin_lock_irqsave(&wdev->event_lock, flags); 685 list_add_tail(&ev->list, &wdev->event_list); 686 spin_unlock_irqrestore(&wdev->event_lock, flags); 687 queue_work(cfg80211_wq, &rdev->event_work); 688 } 689 EXPORT_SYMBOL(cfg80211_roamed_bss); 690 691 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 692 size_t ie_len, u16 reason, bool from_ap) 693 { 694 struct wireless_dev *wdev = dev->ieee80211_ptr; 695 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 696 int i; 697 #ifdef CONFIG_CFG80211_WEXT 698 union iwreq_data wrqu; 699 #endif 700 701 ASSERT_WDEV_LOCK(wdev); 702 703 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 704 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 705 return; 706 707 if (wdev->sme_state != CFG80211_SME_CONNECTED) 708 return; 709 710 if (wdev->current_bss) { 711 cfg80211_unhold_bss(wdev->current_bss); 712 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 713 } 714 715 wdev->current_bss = NULL; 716 wdev->sme_state = CFG80211_SME_IDLE; 717 wdev->ssid_len = 0; 718 719 if (wdev->conn) { 720 kfree(wdev->conn->ie); 721 wdev->conn->ie = NULL; 722 kfree(wdev->conn); 723 wdev->conn = NULL; 724 } 725 726 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 727 728 /* 729 * Delete all the keys ... pairwise keys can't really 730 * exist any more anyway, but default keys might. 731 */ 732 if (rdev->ops->del_key) 733 for (i = 0; i < 6; i++) 734 rdev_del_key(rdev, dev, i, false, NULL); 735 736 #ifdef CONFIG_CFG80211_WEXT 737 memset(&wrqu, 0, sizeof(wrqu)); 738 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 739 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 740 wdev->wext.connect.ssid_len = 0; 741 #endif 742 743 schedule_work(&cfg80211_disconnect_work); 744 } 745 746 void cfg80211_disconnected(struct net_device *dev, u16 reason, 747 u8 *ie, size_t ie_len, gfp_t gfp) 748 { 749 struct wireless_dev *wdev = dev->ieee80211_ptr; 750 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 751 struct cfg80211_event *ev; 752 unsigned long flags; 753 754 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 755 756 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 757 if (!ev) 758 return; 759 760 ev->type = EVENT_DISCONNECTED; 761 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 762 ev->dc.ie_len = ie_len; 763 memcpy((void *)ev->dc.ie, ie, ie_len); 764 ev->dc.reason = reason; 765 766 spin_lock_irqsave(&wdev->event_lock, flags); 767 list_add_tail(&ev->list, &wdev->event_list); 768 spin_unlock_irqrestore(&wdev->event_lock, flags); 769 queue_work(cfg80211_wq, &rdev->event_work); 770 } 771 EXPORT_SYMBOL(cfg80211_disconnected); 772 773 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 774 struct net_device *dev, 775 struct cfg80211_connect_params *connect, 776 struct cfg80211_cached_keys *connkeys, 777 const u8 *prev_bssid) 778 { 779 struct wireless_dev *wdev = dev->ieee80211_ptr; 780 struct cfg80211_bss *bss = NULL; 781 int err; 782 783 ASSERT_WDEV_LOCK(wdev); 784 785 if (wdev->sme_state != CFG80211_SME_IDLE) 786 return -EALREADY; 787 788 if (WARN_ON(wdev->connect_keys)) { 789 kfree(wdev->connect_keys); 790 wdev->connect_keys = NULL; 791 } 792 793 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 794 rdev->wiphy.ht_capa_mod_mask); 795 796 if (connkeys && connkeys->def >= 0) { 797 int idx; 798 u32 cipher; 799 800 idx = connkeys->def; 801 cipher = connkeys->params[idx].cipher; 802 /* If given a WEP key we may need it for shared key auth */ 803 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 804 cipher == WLAN_CIPHER_SUITE_WEP104) { 805 connect->key_idx = idx; 806 connect->key = connkeys->params[idx].key; 807 connect->key_len = connkeys->params[idx].key_len; 808 809 /* 810 * If ciphers are not set (e.g. when going through 811 * iwconfig), we have to set them appropriately here. 812 */ 813 if (connect->crypto.cipher_group == 0) 814 connect->crypto.cipher_group = cipher; 815 816 if (connect->crypto.n_ciphers_pairwise == 0) { 817 connect->crypto.n_ciphers_pairwise = 1; 818 connect->crypto.ciphers_pairwise[0] = cipher; 819 } 820 } 821 } 822 823 if (!rdev->ops->connect) { 824 if (!rdev->ops->auth || !rdev->ops->assoc) 825 return -EOPNOTSUPP; 826 827 if (WARN_ON(wdev->conn)) 828 return -EINPROGRESS; 829 830 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 831 if (!wdev->conn) 832 return -ENOMEM; 833 834 /* 835 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 836 */ 837 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 838 if (connect->bssid) { 839 wdev->conn->params.bssid = wdev->conn->bssid; 840 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 841 } 842 843 if (connect->ie) { 844 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 845 GFP_KERNEL); 846 wdev->conn->params.ie = wdev->conn->ie; 847 if (!wdev->conn->ie) { 848 kfree(wdev->conn); 849 wdev->conn = NULL; 850 return -ENOMEM; 851 } 852 } 853 854 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 855 wdev->conn->auto_auth = true; 856 /* start with open system ... should mostly work */ 857 wdev->conn->params.auth_type = 858 NL80211_AUTHTYPE_OPEN_SYSTEM; 859 } else { 860 wdev->conn->auto_auth = false; 861 } 862 863 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 864 wdev->ssid_len = connect->ssid_len; 865 wdev->conn->params.ssid = wdev->ssid; 866 wdev->conn->params.ssid_len = connect->ssid_len; 867 868 /* see if we have the bss already */ 869 bss = cfg80211_get_conn_bss(wdev); 870 871 wdev->sme_state = CFG80211_SME_CONNECTING; 872 wdev->connect_keys = connkeys; 873 874 if (prev_bssid) { 875 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 876 wdev->conn->prev_bssid_valid = true; 877 } 878 879 /* we're good if we have a matching bss struct */ 880 if (bss) { 881 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 882 err = cfg80211_conn_do_work(wdev); 883 cfg80211_put_bss(wdev->wiphy, bss); 884 } else { 885 /* otherwise we'll need to scan for the AP first */ 886 err = cfg80211_conn_scan(wdev); 887 /* 888 * If we can't scan right now, then we need to scan again 889 * after the current scan finished, since the parameters 890 * changed (unless we find a good AP anyway). 891 */ 892 if (err == -EBUSY) { 893 err = 0; 894 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 895 } 896 } 897 if (err) { 898 kfree(wdev->conn->ie); 899 kfree(wdev->conn); 900 wdev->conn = NULL; 901 wdev->sme_state = CFG80211_SME_IDLE; 902 wdev->connect_keys = NULL; 903 wdev->ssid_len = 0; 904 } 905 906 return err; 907 } else { 908 wdev->sme_state = CFG80211_SME_CONNECTING; 909 wdev->connect_keys = connkeys; 910 err = rdev_connect(rdev, dev, connect); 911 if (err) { 912 wdev->connect_keys = NULL; 913 wdev->sme_state = CFG80211_SME_IDLE; 914 return err; 915 } 916 917 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 918 wdev->ssid_len = connect->ssid_len; 919 920 return 0; 921 } 922 } 923 924 int cfg80211_connect(struct cfg80211_registered_device *rdev, 925 struct net_device *dev, 926 struct cfg80211_connect_params *connect, 927 struct cfg80211_cached_keys *connkeys) 928 { 929 int err; 930 931 mutex_lock(&rdev->devlist_mtx); 932 /* might request scan - scan_mtx -> wdev_mtx dependency */ 933 mutex_lock(&rdev->sched_scan_mtx); 934 wdev_lock(dev->ieee80211_ptr); 935 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL); 936 wdev_unlock(dev->ieee80211_ptr); 937 mutex_unlock(&rdev->sched_scan_mtx); 938 mutex_unlock(&rdev->devlist_mtx); 939 940 return err; 941 } 942 943 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 944 struct net_device *dev, u16 reason, bool wextev) 945 { 946 struct wireless_dev *wdev = dev->ieee80211_ptr; 947 int err; 948 949 ASSERT_WDEV_LOCK(wdev); 950 951 if (wdev->sme_state == CFG80211_SME_IDLE) 952 return -EINVAL; 953 954 kfree(wdev->connect_keys); 955 wdev->connect_keys = NULL; 956 957 if (!rdev->ops->disconnect) { 958 if (!rdev->ops->deauth) 959 return -EOPNOTSUPP; 960 961 /* was it connected by userspace SME? */ 962 if (!wdev->conn) { 963 cfg80211_mlme_down(rdev, dev); 964 return 0; 965 } 966 967 if (wdev->sme_state == CFG80211_SME_CONNECTING && 968 (wdev->conn->state == CFG80211_CONN_SCANNING || 969 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { 970 wdev->sme_state = CFG80211_SME_IDLE; 971 kfree(wdev->conn->ie); 972 kfree(wdev->conn); 973 wdev->conn = NULL; 974 wdev->ssid_len = 0; 975 return 0; 976 } 977 978 /* wdev->conn->params.bssid must be set if > SCANNING */ 979 err = __cfg80211_mlme_deauth(rdev, dev, 980 wdev->conn->params.bssid, 981 NULL, 0, reason, false); 982 if (err) 983 return err; 984 } else { 985 err = rdev_disconnect(rdev, dev, reason); 986 if (err) 987 return err; 988 } 989 990 if (wdev->sme_state == CFG80211_SME_CONNECTED) 991 __cfg80211_disconnected(dev, NULL, 0, 0, false); 992 else if (wdev->sme_state == CFG80211_SME_CONNECTING) 993 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, 994 WLAN_STATUS_UNSPECIFIED_FAILURE, 995 wextev, NULL); 996 997 return 0; 998 } 999 1000 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1001 struct net_device *dev, 1002 u16 reason, bool wextev) 1003 { 1004 int err; 1005 1006 wdev_lock(dev->ieee80211_ptr); 1007 err = __cfg80211_disconnect(rdev, dev, reason, wextev); 1008 wdev_unlock(dev->ieee80211_ptr); 1009 1010 return err; 1011 } 1012 1013 void cfg80211_sme_disassoc(struct net_device *dev, 1014 struct cfg80211_internal_bss *bss) 1015 { 1016 struct wireless_dev *wdev = dev->ieee80211_ptr; 1017 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 1018 u8 bssid[ETH_ALEN]; 1019 1020 ASSERT_WDEV_LOCK(wdev); 1021 1022 if (!wdev->conn) 1023 return; 1024 1025 if (wdev->conn->state == CFG80211_CONN_IDLE) 1026 return; 1027 1028 /* 1029 * Ok, so the association was made by this SME -- we don't 1030 * want it any more so deauthenticate too. 1031 */ 1032 1033 memcpy(bssid, bss->pub.bssid, ETH_ALEN); 1034 1035 __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 1036 WLAN_REASON_DEAUTH_LEAVING, false); 1037 } 1038