sme.c revision f9f475292dbb0e7035fb6661d1524761ea0888d9
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 21struct 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 40static 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 69static void disconnect_work(struct work_struct *work) 70{ 71 if (!cfg80211_is_all_idle()) 72 return; 73 74 regulatory_hint_disconnect(); 75} 76 77static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 78 79static 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 159static int cfg80211_conn_do_work(struct wireless_dev *wdev) 160{ 161 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 162 struct cfg80211_connect_params *params; 163 const u8 *prev_bssid = NULL; 164 int err; 165 166 ASSERT_WDEV_LOCK(wdev); 167 168 if (!wdev->conn) 169 return 0; 170 171 params = &wdev->conn->params; 172 173 switch (wdev->conn->state) { 174 case CFG80211_CONN_SCAN_AGAIN: 175 return cfg80211_conn_scan(wdev); 176 case CFG80211_CONN_AUTHENTICATE_NEXT: 177 BUG_ON(!rdev->ops->auth); 178 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 179 return __cfg80211_mlme_auth(rdev, wdev->netdev, 180 params->channel, params->auth_type, 181 params->bssid, 182 params->ssid, params->ssid_len, 183 NULL, 0, 184 params->key, params->key_len, 185 params->key_idx, NULL, 0); 186 case CFG80211_CONN_ASSOCIATE_NEXT: 187 BUG_ON(!rdev->ops->assoc); 188 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 189 if (wdev->conn->prev_bssid_valid) 190 prev_bssid = wdev->conn->prev_bssid; 191 err = __cfg80211_mlme_assoc(rdev, wdev->netdev, 192 params->channel, params->bssid, 193 prev_bssid, 194 params->ssid, params->ssid_len, 195 params->ie, params->ie_len, 196 params->mfp != NL80211_MFP_NO, 197 ¶ms->crypto, 198 params->flags, ¶ms->ht_capa, 199 ¶ms->ht_capa_mask); 200 if (err) 201 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 202 NULL, 0, 203 WLAN_REASON_DEAUTH_LEAVING, 204 false); 205 return err; 206 case CFG80211_CONN_DEAUTH_ASSOC_FAIL: 207 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 208 NULL, 0, 209 WLAN_REASON_DEAUTH_LEAVING, false); 210 /* return an error so that we call __cfg80211_connect_result() */ 211 return -EINVAL; 212 default: 213 return 0; 214 } 215} 216 217void cfg80211_conn_work(struct work_struct *work) 218{ 219 struct cfg80211_registered_device *rdev = 220 container_of(work, struct cfg80211_registered_device, conn_work); 221 struct wireless_dev *wdev; 222 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 223 224 rtnl_lock(); 225 cfg80211_lock_rdev(rdev); 226 mutex_lock(&rdev->devlist_mtx); 227 228 list_for_each_entry(wdev, &rdev->wdev_list, list) { 229 wdev_lock(wdev); 230 if (!netif_running(wdev->netdev)) { 231 wdev_unlock(wdev); 232 continue; 233 } 234 if (wdev->sme_state != CFG80211_SME_CONNECTING) { 235 wdev_unlock(wdev); 236 continue; 237 } 238 if (wdev->conn->params.bssid) { 239 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 240 bssid = bssid_buf; 241 } 242 if (cfg80211_conn_do_work(wdev)) 243 __cfg80211_connect_result( 244 wdev->netdev, bssid, 245 NULL, 0, NULL, 0, 246 WLAN_STATUS_UNSPECIFIED_FAILURE, 247 false, NULL); 248 wdev_unlock(wdev); 249 } 250 251 mutex_unlock(&rdev->devlist_mtx); 252 cfg80211_unlock_rdev(rdev); 253 rtnl_unlock(); 254} 255 256static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 257{ 258 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 259 struct cfg80211_bss *bss; 260 u16 capa = WLAN_CAPABILITY_ESS; 261 262 ASSERT_WDEV_LOCK(wdev); 263 264 if (wdev->conn->params.privacy) 265 capa |= WLAN_CAPABILITY_PRIVACY; 266 267 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 268 wdev->conn->params.bssid, 269 wdev->conn->params.ssid, 270 wdev->conn->params.ssid_len, 271 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 272 capa); 273 if (!bss) 274 return NULL; 275 276 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 277 wdev->conn->params.bssid = wdev->conn->bssid; 278 wdev->conn->params.channel = bss->channel; 279 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 280 schedule_work(&rdev->conn_work); 281 282 return bss; 283} 284 285static void __cfg80211_sme_scan_done(struct net_device *dev) 286{ 287 struct wireless_dev *wdev = dev->ieee80211_ptr; 288 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 289 struct cfg80211_bss *bss; 290 291 ASSERT_WDEV_LOCK(wdev); 292 293 if (wdev->sme_state != CFG80211_SME_CONNECTING) 294 return; 295 296 if (!wdev->conn) 297 return; 298 299 if (wdev->conn->state != CFG80211_CONN_SCANNING && 300 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 301 return; 302 303 bss = cfg80211_get_conn_bss(wdev); 304 if (bss) { 305 cfg80211_put_bss(&rdev->wiphy, bss); 306 } else { 307 /* not found */ 308 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) 309 schedule_work(&rdev->conn_work); 310 else 311 __cfg80211_connect_result( 312 wdev->netdev, 313 wdev->conn->params.bssid, 314 NULL, 0, NULL, 0, 315 WLAN_STATUS_UNSPECIFIED_FAILURE, 316 false, NULL); 317 } 318} 319 320void cfg80211_sme_scan_done(struct net_device *dev) 321{ 322 struct wireless_dev *wdev = dev->ieee80211_ptr; 323 324 wdev_lock(wdev); 325 __cfg80211_sme_scan_done(dev); 326 wdev_unlock(wdev); 327} 328 329void 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 382bool 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 404void 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 413void __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->wiphy, &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(wdev->wiphy, 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, bss->channel->band, 523 country_ie + 2, country_ie[1]); 524 kfree(country_ie); 525} 526 527void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 528 const u8 *req_ie, size_t req_ie_len, 529 const u8 *resp_ie, size_t resp_ie_len, 530 u16 status, gfp_t gfp) 531{ 532 struct wireless_dev *wdev = dev->ieee80211_ptr; 533 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 534 struct cfg80211_event *ev; 535 unsigned long flags; 536 537 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); 538 539 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 540 if (!ev) 541 return; 542 543 ev->type = EVENT_CONNECT_RESULT; 544 if (bssid) 545 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 546 if (req_ie_len) { 547 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 548 ev->cr.req_ie_len = req_ie_len; 549 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 550 } 551 if (resp_ie_len) { 552 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 553 ev->cr.resp_ie_len = resp_ie_len; 554 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 555 } 556 ev->cr.status = status; 557 558 spin_lock_irqsave(&wdev->event_lock, flags); 559 list_add_tail(&ev->list, &wdev->event_list); 560 spin_unlock_irqrestore(&wdev->event_lock, flags); 561 queue_work(cfg80211_wq, &rdev->event_work); 562} 563EXPORT_SYMBOL(cfg80211_connect_result); 564 565void __cfg80211_roamed(struct wireless_dev *wdev, 566 struct cfg80211_bss *bss, 567 const u8 *req_ie, size_t req_ie_len, 568 const u8 *resp_ie, size_t resp_ie_len) 569{ 570#ifdef CONFIG_CFG80211_WEXT 571 union iwreq_data wrqu; 572#endif 573 ASSERT_WDEV_LOCK(wdev); 574 575 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 576 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 577 goto out; 578 579 if (wdev->sme_state != CFG80211_SME_CONNECTED) 580 goto out; 581 582 /* internal error -- how did we get to CONNECTED w/o BSS? */ 583 if (WARN_ON(!wdev->current_bss)) { 584 goto out; 585 } 586 587 cfg80211_unhold_bss(wdev->current_bss); 588 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 589 wdev->current_bss = NULL; 590 591 cfg80211_hold_bss(bss_from_pub(bss)); 592 wdev->current_bss = bss_from_pub(bss); 593 594 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 595 req_ie, req_ie_len, resp_ie, resp_ie_len, 596 GFP_KERNEL); 597 598#ifdef CONFIG_CFG80211_WEXT 599 if (req_ie) { 600 memset(&wrqu, 0, sizeof(wrqu)); 601 wrqu.data.length = req_ie_len; 602 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 603 &wrqu, req_ie); 604 } 605 606 if (resp_ie) { 607 memset(&wrqu, 0, sizeof(wrqu)); 608 wrqu.data.length = resp_ie_len; 609 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 610 &wrqu, resp_ie); 611 } 612 613 memset(&wrqu, 0, sizeof(wrqu)); 614 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 615 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 616 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 617 wdev->wext.prev_bssid_valid = true; 618 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 619#endif 620 621 return; 622out: 623 cfg80211_put_bss(wdev->wiphy, bss); 624} 625 626void cfg80211_roamed(struct net_device *dev, 627 struct ieee80211_channel *channel, 628 const u8 *bssid, 629 const u8 *req_ie, size_t req_ie_len, 630 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 631{ 632 struct wireless_dev *wdev = dev->ieee80211_ptr; 633 struct cfg80211_bss *bss; 634 635 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 636 637 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 638 wdev->ssid_len, WLAN_CAPABILITY_ESS, 639 WLAN_CAPABILITY_ESS); 640 if (WARN_ON(!bss)) 641 return; 642 643 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 644 resp_ie_len, gfp); 645} 646EXPORT_SYMBOL(cfg80211_roamed); 647 648void cfg80211_roamed_bss(struct net_device *dev, 649 struct cfg80211_bss *bss, const u8 *req_ie, 650 size_t req_ie_len, const u8 *resp_ie, 651 size_t resp_ie_len, gfp_t gfp) 652{ 653 struct wireless_dev *wdev = dev->ieee80211_ptr; 654 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 655 struct cfg80211_event *ev; 656 unsigned long flags; 657 658 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 659 660 if (WARN_ON(!bss)) 661 return; 662 663 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 664 if (!ev) { 665 cfg80211_put_bss(wdev->wiphy, bss); 666 return; 667 } 668 669 ev->type = EVENT_ROAMED; 670 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 671 ev->rm.req_ie_len = req_ie_len; 672 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 673 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 674 ev->rm.resp_ie_len = resp_ie_len; 675 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 676 ev->rm.bss = bss; 677 678 spin_lock_irqsave(&wdev->event_lock, flags); 679 list_add_tail(&ev->list, &wdev->event_list); 680 spin_unlock_irqrestore(&wdev->event_lock, flags); 681 queue_work(cfg80211_wq, &rdev->event_work); 682} 683EXPORT_SYMBOL(cfg80211_roamed_bss); 684 685void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 686 size_t ie_len, u16 reason, bool from_ap) 687{ 688 struct wireless_dev *wdev = dev->ieee80211_ptr; 689 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 690 int i; 691#ifdef CONFIG_CFG80211_WEXT 692 union iwreq_data wrqu; 693#endif 694 695 ASSERT_WDEV_LOCK(wdev); 696 697 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 698 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 699 return; 700 701 if (wdev->sme_state != CFG80211_SME_CONNECTED) 702 return; 703 704 if (wdev->current_bss) { 705 cfg80211_unhold_bss(wdev->current_bss); 706 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 707 } 708 709 wdev->current_bss = NULL; 710 wdev->sme_state = CFG80211_SME_IDLE; 711 wdev->ssid_len = 0; 712 713 if (wdev->conn) { 714 kfree(wdev->conn->ie); 715 wdev->conn->ie = NULL; 716 kfree(wdev->conn); 717 wdev->conn = NULL; 718 } 719 720 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 721 722 /* 723 * Delete all the keys ... pairwise keys can't really 724 * exist any more anyway, but default keys might. 725 */ 726 if (rdev->ops->del_key) 727 for (i = 0; i < 6; i++) 728 rdev_del_key(rdev, dev, i, false, NULL); 729 730#ifdef CONFIG_CFG80211_WEXT 731 memset(&wrqu, 0, sizeof(wrqu)); 732 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 733 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 734 wdev->wext.connect.ssid_len = 0; 735#endif 736 737 schedule_work(&cfg80211_disconnect_work); 738} 739 740void cfg80211_disconnected(struct net_device *dev, u16 reason, 741 u8 *ie, size_t ie_len, gfp_t gfp) 742{ 743 struct wireless_dev *wdev = dev->ieee80211_ptr; 744 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 745 struct cfg80211_event *ev; 746 unsigned long flags; 747 748 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 749 750 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 751 if (!ev) 752 return; 753 754 ev->type = EVENT_DISCONNECTED; 755 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 756 ev->dc.ie_len = ie_len; 757 memcpy((void *)ev->dc.ie, ie, ie_len); 758 ev->dc.reason = reason; 759 760 spin_lock_irqsave(&wdev->event_lock, flags); 761 list_add_tail(&ev->list, &wdev->event_list); 762 spin_unlock_irqrestore(&wdev->event_lock, flags); 763 queue_work(cfg80211_wq, &rdev->event_work); 764} 765EXPORT_SYMBOL(cfg80211_disconnected); 766 767int __cfg80211_connect(struct cfg80211_registered_device *rdev, 768 struct net_device *dev, 769 struct cfg80211_connect_params *connect, 770 struct cfg80211_cached_keys *connkeys, 771 const u8 *prev_bssid) 772{ 773 struct wireless_dev *wdev = dev->ieee80211_ptr; 774 struct cfg80211_bss *bss = NULL; 775 int err; 776 777 ASSERT_WDEV_LOCK(wdev); 778 779 if (wdev->sme_state != CFG80211_SME_IDLE) 780 return -EALREADY; 781 782 if (WARN_ON(wdev->connect_keys)) { 783 kfree(wdev->connect_keys); 784 wdev->connect_keys = NULL; 785 } 786 787 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 788 rdev->wiphy.ht_capa_mod_mask); 789 790 if (connkeys && connkeys->def >= 0) { 791 int idx; 792 u32 cipher; 793 794 idx = connkeys->def; 795 cipher = connkeys->params[idx].cipher; 796 /* If given a WEP key we may need it for shared key auth */ 797 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 798 cipher == WLAN_CIPHER_SUITE_WEP104) { 799 connect->key_idx = idx; 800 connect->key = connkeys->params[idx].key; 801 connect->key_len = connkeys->params[idx].key_len; 802 803 /* 804 * If ciphers are not set (e.g. when going through 805 * iwconfig), we have to set them appropriately here. 806 */ 807 if (connect->crypto.cipher_group == 0) 808 connect->crypto.cipher_group = cipher; 809 810 if (connect->crypto.n_ciphers_pairwise == 0) { 811 connect->crypto.n_ciphers_pairwise = 1; 812 connect->crypto.ciphers_pairwise[0] = cipher; 813 } 814 } 815 } 816 817 if (!rdev->ops->connect) { 818 if (!rdev->ops->auth || !rdev->ops->assoc) 819 return -EOPNOTSUPP; 820 821 if (WARN_ON(wdev->conn)) 822 return -EINPROGRESS; 823 824 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 825 if (!wdev->conn) 826 return -ENOMEM; 827 828 /* 829 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 830 */ 831 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 832 if (connect->bssid) { 833 wdev->conn->params.bssid = wdev->conn->bssid; 834 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 835 } 836 837 if (connect->ie) { 838 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 839 GFP_KERNEL); 840 wdev->conn->params.ie = wdev->conn->ie; 841 if (!wdev->conn->ie) { 842 kfree(wdev->conn); 843 wdev->conn = NULL; 844 return -ENOMEM; 845 } 846 } 847 848 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 849 wdev->conn->auto_auth = true; 850 /* start with open system ... should mostly work */ 851 wdev->conn->params.auth_type = 852 NL80211_AUTHTYPE_OPEN_SYSTEM; 853 } else { 854 wdev->conn->auto_auth = false; 855 } 856 857 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 858 wdev->ssid_len = connect->ssid_len; 859 wdev->conn->params.ssid = wdev->ssid; 860 wdev->conn->params.ssid_len = connect->ssid_len; 861 862 /* see if we have the bss already */ 863 bss = cfg80211_get_conn_bss(wdev); 864 865 wdev->sme_state = CFG80211_SME_CONNECTING; 866 wdev->connect_keys = connkeys; 867 868 if (prev_bssid) { 869 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 870 wdev->conn->prev_bssid_valid = true; 871 } 872 873 /* we're good if we have a matching bss struct */ 874 if (bss) { 875 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 876 err = cfg80211_conn_do_work(wdev); 877 cfg80211_put_bss(wdev->wiphy, bss); 878 } else { 879 /* otherwise we'll need to scan for the AP first */ 880 err = cfg80211_conn_scan(wdev); 881 /* 882 * If we can't scan right now, then we need to scan again 883 * after the current scan finished, since the parameters 884 * changed (unless we find a good AP anyway). 885 */ 886 if (err == -EBUSY) { 887 err = 0; 888 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 889 } 890 } 891 if (err) { 892 kfree(wdev->conn->ie); 893 kfree(wdev->conn); 894 wdev->conn = NULL; 895 wdev->sme_state = CFG80211_SME_IDLE; 896 wdev->connect_keys = NULL; 897 wdev->ssid_len = 0; 898 } 899 900 return err; 901 } else { 902 wdev->sme_state = CFG80211_SME_CONNECTING; 903 wdev->connect_keys = connkeys; 904 err = rdev_connect(rdev, dev, connect); 905 if (err) { 906 wdev->connect_keys = NULL; 907 wdev->sme_state = CFG80211_SME_IDLE; 908 return err; 909 } 910 911 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 912 wdev->ssid_len = connect->ssid_len; 913 914 return 0; 915 } 916} 917 918int cfg80211_connect(struct cfg80211_registered_device *rdev, 919 struct net_device *dev, 920 struct cfg80211_connect_params *connect, 921 struct cfg80211_cached_keys *connkeys) 922{ 923 int err; 924 925 mutex_lock(&rdev->devlist_mtx); 926 /* might request scan - scan_mtx -> wdev_mtx dependency */ 927 mutex_lock(&rdev->sched_scan_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->sched_scan_mtx); 932 mutex_unlock(&rdev->devlist_mtx); 933 934 return err; 935} 936 937int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 938 struct net_device *dev, u16 reason, bool wextev) 939{ 940 struct wireless_dev *wdev = dev->ieee80211_ptr; 941 int err; 942 943 ASSERT_WDEV_LOCK(wdev); 944 945 if (wdev->sme_state == CFG80211_SME_IDLE) 946 return -EINVAL; 947 948 kfree(wdev->connect_keys); 949 wdev->connect_keys = NULL; 950 951 if (!rdev->ops->disconnect) { 952 if (!rdev->ops->deauth) 953 return -EOPNOTSUPP; 954 955 /* was it connected by userspace SME? */ 956 if (!wdev->conn) { 957 cfg80211_mlme_down(rdev, dev); 958 return 0; 959 } 960 961 if (wdev->sme_state == CFG80211_SME_CONNECTING && 962 (wdev->conn->state == CFG80211_CONN_SCANNING || 963 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { 964 wdev->sme_state = CFG80211_SME_IDLE; 965 kfree(wdev->conn->ie); 966 kfree(wdev->conn); 967 wdev->conn = NULL; 968 wdev->ssid_len = 0; 969 return 0; 970 } 971 972 /* wdev->conn->params.bssid must be set if > SCANNING */ 973 err = __cfg80211_mlme_deauth(rdev, dev, 974 wdev->conn->params.bssid, 975 NULL, 0, reason, false); 976 if (err) 977 return err; 978 } else { 979 err = rdev_disconnect(rdev, dev, reason); 980 if (err) 981 return err; 982 } 983 984 if (wdev->sme_state == CFG80211_SME_CONNECTED) 985 __cfg80211_disconnected(dev, NULL, 0, 0, false); 986 else if (wdev->sme_state == CFG80211_SME_CONNECTING) 987 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, 988 WLAN_STATUS_UNSPECIFIED_FAILURE, 989 wextev, NULL); 990 991 return 0; 992} 993 994int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 995 struct net_device *dev, 996 u16 reason, bool wextev) 997{ 998 int err; 999 1000 wdev_lock(dev->ieee80211_ptr); 1001 err = __cfg80211_disconnect(rdev, dev, reason, wextev); 1002 wdev_unlock(dev->ieee80211_ptr); 1003 1004 return err; 1005} 1006 1007void cfg80211_sme_disassoc(struct net_device *dev, 1008 struct cfg80211_internal_bss *bss) 1009{ 1010 struct wireless_dev *wdev = dev->ieee80211_ptr; 1011 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 1012 u8 bssid[ETH_ALEN]; 1013 1014 ASSERT_WDEV_LOCK(wdev); 1015 1016 if (!wdev->conn) 1017 return; 1018 1019 if (wdev->conn->state == CFG80211_CONN_IDLE) 1020 return; 1021 1022 /* 1023 * Ok, so the association was made by this SME -- we don't 1024 * want it any more so deauthenticate too. 1025 */ 1026 1027 memcpy(bssid, bss->pub.bssid, ETH_ALEN); 1028 1029 __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 1030 WLAN_REASON_DEAUTH_LEAVING, false); 1031} 1032