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 struct cfg80211_assoc_request req = {}; 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 req.prev_bssid = wdev->conn->prev_bssid; 190 req.ie = params->ie; 191 req.ie_len = params->ie_len; 192 req.use_mfp = params->mfp != NL80211_MFP_NO; 193 req.crypto = params->crypto; 194 req.flags = params->flags; 195 req.ht_capa = params->ht_capa; 196 req.ht_capa_mask = params->ht_capa_mask; 197 req.vht_capa = params->vht_capa; 198 req.vht_capa_mask = params->vht_capa_mask; 199 200 err = __cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 201 params->bssid, params->ssid, 202 params->ssid_len, &req); 203 if (err) 204 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 205 NULL, 0, 206 WLAN_REASON_DEAUTH_LEAVING, 207 false); 208 return err; 209 case CFG80211_CONN_DEAUTH_ASSOC_FAIL: 210 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 211 NULL, 0, 212 WLAN_REASON_DEAUTH_LEAVING, false); 213 /* return an error so that we call __cfg80211_connect_result() */ 214 return -EINVAL; 215 default: 216 return 0; 217 } 218 } 219 220 void cfg80211_conn_work(struct work_struct *work) 221 { 222 struct cfg80211_registered_device *rdev = 223 container_of(work, struct cfg80211_registered_device, conn_work); 224 struct wireless_dev *wdev; 225 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 226 227 rtnl_lock(); 228 cfg80211_lock_rdev(rdev); 229 mutex_lock(&rdev->devlist_mtx); 230 231 list_for_each_entry(wdev, &rdev->wdev_list, list) { 232 wdev_lock(wdev); 233 if (!netif_running(wdev->netdev)) { 234 wdev_unlock(wdev); 235 continue; 236 } 237 if (wdev->sme_state != CFG80211_SME_CONNECTING) { 238 wdev_unlock(wdev); 239 continue; 240 } 241 if (wdev->conn->params.bssid) { 242 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 243 bssid = bssid_buf; 244 } 245 if (cfg80211_conn_do_work(wdev)) 246 __cfg80211_connect_result( 247 wdev->netdev, bssid, 248 NULL, 0, NULL, 0, 249 WLAN_STATUS_UNSPECIFIED_FAILURE, 250 false, NULL); 251 wdev_unlock(wdev); 252 } 253 254 mutex_unlock(&rdev->devlist_mtx); 255 cfg80211_unlock_rdev(rdev); 256 rtnl_unlock(); 257 } 258 259 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 260 { 261 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 262 struct cfg80211_bss *bss; 263 u16 capa = WLAN_CAPABILITY_ESS; 264 265 ASSERT_WDEV_LOCK(wdev); 266 267 if (wdev->conn->params.privacy) 268 capa |= WLAN_CAPABILITY_PRIVACY; 269 270 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 271 wdev->conn->params.bssid, 272 wdev->conn->params.ssid, 273 wdev->conn->params.ssid_len, 274 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 275 capa); 276 if (!bss) 277 return NULL; 278 279 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 280 wdev->conn->params.bssid = wdev->conn->bssid; 281 wdev->conn->params.channel = bss->channel; 282 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 283 schedule_work(&rdev->conn_work); 284 285 return bss; 286 } 287 288 static void __cfg80211_sme_scan_done(struct net_device *dev) 289 { 290 struct wireless_dev *wdev = dev->ieee80211_ptr; 291 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 292 struct cfg80211_bss *bss; 293 294 ASSERT_WDEV_LOCK(wdev); 295 296 if (wdev->sme_state != CFG80211_SME_CONNECTING) 297 return; 298 299 if (!wdev->conn) 300 return; 301 302 if (wdev->conn->state != CFG80211_CONN_SCANNING && 303 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 304 return; 305 306 bss = cfg80211_get_conn_bss(wdev); 307 if (bss) { 308 cfg80211_put_bss(&rdev->wiphy, bss); 309 } else { 310 /* not found */ 311 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) 312 schedule_work(&rdev->conn_work); 313 else 314 __cfg80211_connect_result( 315 wdev->netdev, 316 wdev->conn->params.bssid, 317 NULL, 0, NULL, 0, 318 WLAN_STATUS_UNSPECIFIED_FAILURE, 319 false, NULL); 320 } 321 } 322 323 void cfg80211_sme_scan_done(struct net_device *dev) 324 { 325 struct wireless_dev *wdev = dev->ieee80211_ptr; 326 327 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); 328 wdev_lock(wdev); 329 __cfg80211_sme_scan_done(dev); 330 wdev_unlock(wdev); 331 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); 332 } 333 334 void cfg80211_sme_rx_auth(struct net_device *dev, 335 const u8 *buf, size_t len) 336 { 337 struct wireless_dev *wdev = dev->ieee80211_ptr; 338 struct wiphy *wiphy = wdev->wiphy; 339 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 340 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 341 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 342 343 ASSERT_WDEV_LOCK(wdev); 344 345 /* should only RX auth frames when connecting */ 346 if (wdev->sme_state != CFG80211_SME_CONNECTING) 347 return; 348 349 if (WARN_ON(!wdev->conn)) 350 return; 351 352 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 353 wdev->conn->auto_auth && 354 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 355 /* select automatically between only open, shared, leap */ 356 switch (wdev->conn->params.auth_type) { 357 case NL80211_AUTHTYPE_OPEN_SYSTEM: 358 if (wdev->connect_keys) 359 wdev->conn->params.auth_type = 360 NL80211_AUTHTYPE_SHARED_KEY; 361 else 362 wdev->conn->params.auth_type = 363 NL80211_AUTHTYPE_NETWORK_EAP; 364 break; 365 case NL80211_AUTHTYPE_SHARED_KEY: 366 wdev->conn->params.auth_type = 367 NL80211_AUTHTYPE_NETWORK_EAP; 368 break; 369 default: 370 /* huh? */ 371 wdev->conn->params.auth_type = 372 NL80211_AUTHTYPE_OPEN_SYSTEM; 373 break; 374 } 375 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 376 schedule_work(&rdev->conn_work); 377 } else if (status_code != WLAN_STATUS_SUCCESS) { 378 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, 379 status_code, false, NULL); 380 } else if (wdev->sme_state == CFG80211_SME_CONNECTING && 381 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 382 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 383 schedule_work(&rdev->conn_work); 384 } 385 } 386 387 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) 388 { 389 struct wiphy *wiphy = wdev->wiphy; 390 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 391 392 if (WARN_ON(!wdev->conn)) 393 return false; 394 395 if (!wdev->conn->prev_bssid_valid) 396 return false; 397 398 /* 399 * Some stupid APs don't accept reassoc, so we 400 * need to fall back to trying regular assoc. 401 */ 402 wdev->conn->prev_bssid_valid = false; 403 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 404 schedule_work(&rdev->conn_work); 405 406 return true; 407 } 408 409 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) 410 { 411 struct wiphy *wiphy = wdev->wiphy; 412 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 413 414 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; 415 schedule_work(&rdev->conn_work); 416 } 417 418 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 419 const u8 *req_ie, size_t req_ie_len, 420 const u8 *resp_ie, size_t resp_ie_len, 421 u16 status, bool wextev, 422 struct cfg80211_bss *bss) 423 { 424 struct wireless_dev *wdev = dev->ieee80211_ptr; 425 const u8 *country_ie; 426 #ifdef CONFIG_CFG80211_WEXT 427 union iwreq_data wrqu; 428 #endif 429 430 ASSERT_WDEV_LOCK(wdev); 431 432 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 433 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 434 return; 435 436 if (wdev->sme_state != CFG80211_SME_CONNECTING) 437 return; 438 439 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 440 bssid, req_ie, req_ie_len, 441 resp_ie, resp_ie_len, 442 status, GFP_KERNEL); 443 444 #ifdef CONFIG_CFG80211_WEXT 445 if (wextev) { 446 if (req_ie && status == WLAN_STATUS_SUCCESS) { 447 memset(&wrqu, 0, sizeof(wrqu)); 448 wrqu.data.length = req_ie_len; 449 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 450 } 451 452 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 453 memset(&wrqu, 0, sizeof(wrqu)); 454 wrqu.data.length = resp_ie_len; 455 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 456 } 457 458 memset(&wrqu, 0, sizeof(wrqu)); 459 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 460 if (bssid && status == WLAN_STATUS_SUCCESS) { 461 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 462 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 463 wdev->wext.prev_bssid_valid = true; 464 } 465 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 466 } 467 #endif 468 469 if (wdev->current_bss) { 470 cfg80211_unhold_bss(wdev->current_bss); 471 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 472 wdev->current_bss = NULL; 473 } 474 475 if (wdev->conn) 476 wdev->conn->state = CFG80211_CONN_IDLE; 477 478 if (status != WLAN_STATUS_SUCCESS) { 479 wdev->sme_state = CFG80211_SME_IDLE; 480 if (wdev->conn) 481 kfree(wdev->conn->ie); 482 kfree(wdev->conn); 483 wdev->conn = NULL; 484 kfree(wdev->connect_keys); 485 wdev->connect_keys = NULL; 486 wdev->ssid_len = 0; 487 cfg80211_put_bss(wdev->wiphy, bss); 488 return; 489 } 490 491 if (!bss) 492 bss = cfg80211_get_bss(wdev->wiphy, 493 wdev->conn ? wdev->conn->params.channel : 494 NULL, 495 bssid, 496 wdev->ssid, wdev->ssid_len, 497 WLAN_CAPABILITY_ESS, 498 WLAN_CAPABILITY_ESS); 499 500 if (WARN_ON(!bss)) 501 return; 502 503 cfg80211_hold_bss(bss_from_pub(bss)); 504 wdev->current_bss = bss_from_pub(bss); 505 506 wdev->sme_state = CFG80211_SME_CONNECTED; 507 cfg80211_upload_connect_keys(wdev); 508 509 rcu_read_lock(); 510 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 511 if (!country_ie) { 512 rcu_read_unlock(); 513 return; 514 } 515 516 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 517 rcu_read_unlock(); 518 519 if (!country_ie) 520 return; 521 522 /* 523 * ieee80211_bss_get_ie() ensures we can access: 524 * - country_ie + 2, the start of the country ie data, and 525 * - and country_ie[1] which is the IE length 526 */ 527 regulatory_hint_11d(wdev->wiphy, bss->channel->band, 528 country_ie + 2, country_ie[1]); 529 kfree(country_ie); 530 } 531 532 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 533 const u8 *req_ie, size_t req_ie_len, 534 const u8 *resp_ie, size_t resp_ie_len, 535 u16 status, gfp_t gfp) 536 { 537 struct wireless_dev *wdev = dev->ieee80211_ptr; 538 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 539 struct cfg80211_event *ev; 540 unsigned long flags; 541 542 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); 543 544 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 545 if (!ev) 546 return; 547 548 ev->type = EVENT_CONNECT_RESULT; 549 if (bssid) 550 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 551 if (req_ie_len) { 552 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 553 ev->cr.req_ie_len = req_ie_len; 554 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 555 } 556 if (resp_ie_len) { 557 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 558 ev->cr.resp_ie_len = resp_ie_len; 559 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 560 } 561 ev->cr.status = status; 562 563 spin_lock_irqsave(&wdev->event_lock, flags); 564 list_add_tail(&ev->list, &wdev->event_list); 565 spin_unlock_irqrestore(&wdev->event_lock, flags); 566 queue_work(cfg80211_wq, &rdev->event_work); 567 } 568 EXPORT_SYMBOL(cfg80211_connect_result); 569 570 void __cfg80211_roamed(struct wireless_dev *wdev, 571 struct cfg80211_bss *bss, 572 const u8 *req_ie, size_t req_ie_len, 573 const u8 *resp_ie, size_t resp_ie_len) 574 { 575 #ifdef CONFIG_CFG80211_WEXT 576 union iwreq_data wrqu; 577 #endif 578 ASSERT_WDEV_LOCK(wdev); 579 580 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 581 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 582 goto out; 583 584 if (wdev->sme_state != CFG80211_SME_CONNECTED) 585 goto out; 586 587 /* internal error -- how did we get to CONNECTED w/o BSS? */ 588 if (WARN_ON(!wdev->current_bss)) { 589 goto out; 590 } 591 592 cfg80211_unhold_bss(wdev->current_bss); 593 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 594 wdev->current_bss = NULL; 595 596 cfg80211_hold_bss(bss_from_pub(bss)); 597 wdev->current_bss = bss_from_pub(bss); 598 599 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 600 req_ie, req_ie_len, resp_ie, resp_ie_len, 601 GFP_KERNEL); 602 603 #ifdef CONFIG_CFG80211_WEXT 604 if (req_ie) { 605 memset(&wrqu, 0, sizeof(wrqu)); 606 wrqu.data.length = req_ie_len; 607 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 608 &wrqu, req_ie); 609 } 610 611 if (resp_ie) { 612 memset(&wrqu, 0, sizeof(wrqu)); 613 wrqu.data.length = resp_ie_len; 614 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 615 &wrqu, resp_ie); 616 } 617 618 memset(&wrqu, 0, sizeof(wrqu)); 619 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 620 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 621 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 622 wdev->wext.prev_bssid_valid = true; 623 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 624 #endif 625 626 return; 627 out: 628 cfg80211_put_bss(wdev->wiphy, bss); 629 } 630 631 void cfg80211_roamed(struct net_device *dev, 632 struct ieee80211_channel *channel, 633 const u8 *bssid, 634 const u8 *req_ie, size_t req_ie_len, 635 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 636 { 637 struct wireless_dev *wdev = dev->ieee80211_ptr; 638 struct cfg80211_bss *bss; 639 640 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 641 642 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 643 wdev->ssid_len, WLAN_CAPABILITY_ESS, 644 WLAN_CAPABILITY_ESS); 645 if (WARN_ON(!bss)) 646 return; 647 648 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 649 resp_ie_len, gfp); 650 } 651 EXPORT_SYMBOL(cfg80211_roamed); 652 653 void cfg80211_roamed_bss(struct net_device *dev, 654 struct cfg80211_bss *bss, const u8 *req_ie, 655 size_t req_ie_len, const u8 *resp_ie, 656 size_t resp_ie_len, gfp_t gfp) 657 { 658 struct wireless_dev *wdev = dev->ieee80211_ptr; 659 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 660 struct cfg80211_event *ev; 661 unsigned long flags; 662 663 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 664 665 if (WARN_ON(!bss)) 666 return; 667 668 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 669 if (!ev) { 670 cfg80211_put_bss(wdev->wiphy, bss); 671 return; 672 } 673 674 ev->type = EVENT_ROAMED; 675 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 676 ev->rm.req_ie_len = req_ie_len; 677 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 678 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 679 ev->rm.resp_ie_len = resp_ie_len; 680 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 681 ev->rm.bss = bss; 682 683 spin_lock_irqsave(&wdev->event_lock, flags); 684 list_add_tail(&ev->list, &wdev->event_list); 685 spin_unlock_irqrestore(&wdev->event_lock, flags); 686 queue_work(cfg80211_wq, &rdev->event_work); 687 } 688 EXPORT_SYMBOL(cfg80211_roamed_bss); 689 690 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 691 size_t ie_len, u16 reason, bool from_ap) 692 { 693 struct wireless_dev *wdev = dev->ieee80211_ptr; 694 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 695 int i; 696 #ifdef CONFIG_CFG80211_WEXT 697 union iwreq_data wrqu; 698 #endif 699 700 ASSERT_WDEV_LOCK(wdev); 701 702 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 703 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 704 return; 705 706 if (wdev->sme_state != CFG80211_SME_CONNECTED) 707 return; 708 709 if (wdev->current_bss) { 710 cfg80211_unhold_bss(wdev->current_bss); 711 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 712 } 713 714 wdev->current_bss = NULL; 715 wdev->sme_state = CFG80211_SME_IDLE; 716 wdev->ssid_len = 0; 717 718 if (wdev->conn) { 719 kfree(wdev->conn->ie); 720 wdev->conn->ie = NULL; 721 kfree(wdev->conn); 722 wdev->conn = NULL; 723 } 724 725 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 726 727 /* 728 * Delete all the keys ... pairwise keys can't really 729 * exist any more anyway, but default keys might. 730 */ 731 if (rdev->ops->del_key) 732 for (i = 0; i < 6; i++) 733 rdev_del_key(rdev, dev, i, false, NULL); 734 735 #ifdef CONFIG_CFG80211_WEXT 736 memset(&wrqu, 0, sizeof(wrqu)); 737 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 738 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 739 wdev->wext.connect.ssid_len = 0; 740 #endif 741 742 schedule_work(&cfg80211_disconnect_work); 743 } 744 745 void cfg80211_disconnected(struct net_device *dev, u16 reason, 746 u8 *ie, size_t ie_len, gfp_t gfp) 747 { 748 struct wireless_dev *wdev = dev->ieee80211_ptr; 749 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 750 struct cfg80211_event *ev; 751 unsigned long flags; 752 753 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 754 755 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 756 if (!ev) 757 return; 758 759 ev->type = EVENT_DISCONNECTED; 760 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 761 ev->dc.ie_len = ie_len; 762 memcpy((void *)ev->dc.ie, ie, ie_len); 763 ev->dc.reason = reason; 764 765 spin_lock_irqsave(&wdev->event_lock, flags); 766 list_add_tail(&ev->list, &wdev->event_list); 767 spin_unlock_irqrestore(&wdev->event_lock, flags); 768 queue_work(cfg80211_wq, &rdev->event_work); 769 } 770 EXPORT_SYMBOL(cfg80211_disconnected); 771 772 int __cfg80211_connect(struct cfg80211_registered_device *rdev, 773 struct net_device *dev, 774 struct cfg80211_connect_params *connect, 775 struct cfg80211_cached_keys *connkeys, 776 const u8 *prev_bssid) 777 { 778 struct wireless_dev *wdev = dev->ieee80211_ptr; 779 struct cfg80211_bss *bss = NULL; 780 int err; 781 782 ASSERT_WDEV_LOCK(wdev); 783 784 if (wdev->sme_state != CFG80211_SME_IDLE) 785 return -EALREADY; 786 787 if (WARN_ON(wdev->connect_keys)) { 788 kfree(wdev->connect_keys); 789 wdev->connect_keys = NULL; 790 } 791 792 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 793 rdev->wiphy.ht_capa_mod_mask); 794 795 if (connkeys && connkeys->def >= 0) { 796 int idx; 797 u32 cipher; 798 799 idx = connkeys->def; 800 cipher = connkeys->params[idx].cipher; 801 /* If given a WEP key we may need it for shared key auth */ 802 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 803 cipher == WLAN_CIPHER_SUITE_WEP104) { 804 connect->key_idx = idx; 805 connect->key = connkeys->params[idx].key; 806 connect->key_len = connkeys->params[idx].key_len; 807 808 /* 809 * If ciphers are not set (e.g. when going through 810 * iwconfig), we have to set them appropriately here. 811 */ 812 if (connect->crypto.cipher_group == 0) 813 connect->crypto.cipher_group = cipher; 814 815 if (connect->crypto.n_ciphers_pairwise == 0) { 816 connect->crypto.n_ciphers_pairwise = 1; 817 connect->crypto.ciphers_pairwise[0] = cipher; 818 } 819 } 820 } 821 822 if (!rdev->ops->connect) { 823 if (!rdev->ops->auth || !rdev->ops->assoc) 824 return -EOPNOTSUPP; 825 826 if (WARN_ON(wdev->conn)) 827 return -EINPROGRESS; 828 829 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 830 if (!wdev->conn) 831 return -ENOMEM; 832 833 /* 834 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 835 */ 836 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 837 if (connect->bssid) { 838 wdev->conn->params.bssid = wdev->conn->bssid; 839 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 840 } 841 842 if (connect->ie) { 843 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 844 GFP_KERNEL); 845 wdev->conn->params.ie = wdev->conn->ie; 846 if (!wdev->conn->ie) { 847 kfree(wdev->conn); 848 wdev->conn = NULL; 849 return -ENOMEM; 850 } 851 } 852 853 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 854 wdev->conn->auto_auth = true; 855 /* start with open system ... should mostly work */ 856 wdev->conn->params.auth_type = 857 NL80211_AUTHTYPE_OPEN_SYSTEM; 858 } else { 859 wdev->conn->auto_auth = false; 860 } 861 862 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 863 wdev->ssid_len = connect->ssid_len; 864 wdev->conn->params.ssid = wdev->ssid; 865 wdev->conn->params.ssid_len = connect->ssid_len; 866 867 /* see if we have the bss already */ 868 bss = cfg80211_get_conn_bss(wdev); 869 870 wdev->sme_state = CFG80211_SME_CONNECTING; 871 wdev->connect_keys = connkeys; 872 873 if (prev_bssid) { 874 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 875 wdev->conn->prev_bssid_valid = true; 876 } 877 878 /* we're good if we have a matching bss struct */ 879 if (bss) { 880 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 881 err = cfg80211_conn_do_work(wdev); 882 cfg80211_put_bss(wdev->wiphy, bss); 883 } else { 884 /* otherwise we'll need to scan for the AP first */ 885 err = cfg80211_conn_scan(wdev); 886 /* 887 * If we can't scan right now, then we need to scan again 888 * after the current scan finished, since the parameters 889 * changed (unless we find a good AP anyway). 890 */ 891 if (err == -EBUSY) { 892 err = 0; 893 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 894 } 895 } 896 if (err) { 897 kfree(wdev->conn->ie); 898 kfree(wdev->conn); 899 wdev->conn = NULL; 900 wdev->sme_state = CFG80211_SME_IDLE; 901 wdev->connect_keys = NULL; 902 wdev->ssid_len = 0; 903 } 904 905 return err; 906 } else { 907 wdev->sme_state = CFG80211_SME_CONNECTING; 908 wdev->connect_keys = connkeys; 909 err = rdev_connect(rdev, dev, connect); 910 if (err) { 911 wdev->connect_keys = NULL; 912 wdev->sme_state = CFG80211_SME_IDLE; 913 return err; 914 } 915 916 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 917 wdev->ssid_len = connect->ssid_len; 918 919 return 0; 920 } 921 } 922 923 int cfg80211_connect(struct cfg80211_registered_device *rdev, 924 struct net_device *dev, 925 struct cfg80211_connect_params *connect, 926 struct cfg80211_cached_keys *connkeys) 927 { 928 int err; 929 930 mutex_lock(&rdev->devlist_mtx); 931 wdev_lock(dev->ieee80211_ptr); 932 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL); 933 wdev_unlock(dev->ieee80211_ptr); 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