sme.c revision 5b112d3d098c97b867cc580f590395cd1e72f18c
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 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 158static 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 params->mfp != NL80211_MFP_NO, 196 ¶ms->crypto, 197 params->flags, ¶ms->ht_capa, 198 ¶ms->ht_capa_mask); 199 if (err) 200 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 201 NULL, 0, 202 WLAN_REASON_DEAUTH_LEAVING, 203 false); 204 return err; 205 case CFG80211_CONN_DEAUTH_ASSOC_FAIL: 206 __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 207 NULL, 0, 208 WLAN_REASON_DEAUTH_LEAVING, false); 209 /* return an error so that we call __cfg80211_connect_result() */ 210 return -EINVAL; 211 default: 212 return 0; 213 } 214} 215 216void cfg80211_conn_work(struct work_struct *work) 217{ 218 struct cfg80211_registered_device *rdev = 219 container_of(work, struct cfg80211_registered_device, conn_work); 220 struct wireless_dev *wdev; 221 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 222 223 rtnl_lock(); 224 cfg80211_lock_rdev(rdev); 225 mutex_lock(&rdev->devlist_mtx); 226 227 list_for_each_entry(wdev, &rdev->wdev_list, list) { 228 wdev_lock(wdev); 229 if (!netif_running(wdev->netdev)) { 230 wdev_unlock(wdev); 231 continue; 232 } 233 if (wdev->sme_state != CFG80211_SME_CONNECTING) { 234 wdev_unlock(wdev); 235 continue; 236 } 237 if (wdev->conn->params.bssid) { 238 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 239 bssid = bssid_buf; 240 } 241 if (cfg80211_conn_do_work(wdev)) 242 __cfg80211_connect_result( 243 wdev->netdev, bssid, 244 NULL, 0, NULL, 0, 245 WLAN_STATUS_UNSPECIFIED_FAILURE, 246 false, NULL); 247 wdev_unlock(wdev); 248 } 249 250 mutex_unlock(&rdev->devlist_mtx); 251 cfg80211_unlock_rdev(rdev); 252 rtnl_unlock(); 253} 254 255static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 256{ 257 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 258 struct cfg80211_bss *bss; 259 u16 capa = WLAN_CAPABILITY_ESS; 260 261 ASSERT_WDEV_LOCK(wdev); 262 263 if (wdev->conn->params.privacy) 264 capa |= WLAN_CAPABILITY_PRIVACY; 265 266 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 267 wdev->conn->params.bssid, 268 wdev->conn->params.ssid, 269 wdev->conn->params.ssid_len, 270 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 271 capa); 272 if (!bss) 273 return NULL; 274 275 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 276 wdev->conn->params.bssid = wdev->conn->bssid; 277 wdev->conn->params.channel = bss->channel; 278 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 279 schedule_work(&rdev->conn_work); 280 281 return bss; 282} 283 284static void __cfg80211_sme_scan_done(struct net_device *dev) 285{ 286 struct wireless_dev *wdev = dev->ieee80211_ptr; 287 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 288 struct cfg80211_bss *bss; 289 290 ASSERT_WDEV_LOCK(wdev); 291 292 if (wdev->sme_state != CFG80211_SME_CONNECTING) 293 return; 294 295 if (!wdev->conn) 296 return; 297 298 if (wdev->conn->state != CFG80211_CONN_SCANNING && 299 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 300 return; 301 302 bss = cfg80211_get_conn_bss(wdev); 303 if (bss) { 304 cfg80211_put_bss(&rdev->wiphy, bss); 305 } else { 306 /* not found */ 307 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) 308 schedule_work(&rdev->conn_work); 309 else 310 __cfg80211_connect_result( 311 wdev->netdev, 312 wdev->conn->params.bssid, 313 NULL, 0, NULL, 0, 314 WLAN_STATUS_UNSPECIFIED_FAILURE, 315 false, NULL); 316 } 317} 318 319void cfg80211_sme_scan_done(struct net_device *dev) 320{ 321 struct wireless_dev *wdev = dev->ieee80211_ptr; 322 323 mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); 324 wdev_lock(wdev); 325 __cfg80211_sme_scan_done(dev); 326 wdev_unlock(wdev); 327 mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); 328} 329 330void cfg80211_sme_rx_auth(struct net_device *dev, 331 const u8 *buf, size_t len) 332{ 333 struct wireless_dev *wdev = dev->ieee80211_ptr; 334 struct wiphy *wiphy = wdev->wiphy; 335 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 336 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 337 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 338 339 ASSERT_WDEV_LOCK(wdev); 340 341 /* should only RX auth frames when connecting */ 342 if (wdev->sme_state != CFG80211_SME_CONNECTING) 343 return; 344 345 if (WARN_ON(!wdev->conn)) 346 return; 347 348 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 349 wdev->conn->auto_auth && 350 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 351 /* select automatically between only open, shared, leap */ 352 switch (wdev->conn->params.auth_type) { 353 case NL80211_AUTHTYPE_OPEN_SYSTEM: 354 if (wdev->connect_keys) 355 wdev->conn->params.auth_type = 356 NL80211_AUTHTYPE_SHARED_KEY; 357 else 358 wdev->conn->params.auth_type = 359 NL80211_AUTHTYPE_NETWORK_EAP; 360 break; 361 case NL80211_AUTHTYPE_SHARED_KEY: 362 wdev->conn->params.auth_type = 363 NL80211_AUTHTYPE_NETWORK_EAP; 364 break; 365 default: 366 /* huh? */ 367 wdev->conn->params.auth_type = 368 NL80211_AUTHTYPE_OPEN_SYSTEM; 369 break; 370 } 371 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 372 schedule_work(&rdev->conn_work); 373 } else if (status_code != WLAN_STATUS_SUCCESS) { 374 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, 375 status_code, false, NULL); 376 } else if (wdev->sme_state == CFG80211_SME_CONNECTING && 377 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 378 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 379 schedule_work(&rdev->conn_work); 380 } 381} 382 383bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) 384{ 385 struct wiphy *wiphy = wdev->wiphy; 386 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 387 388 if (WARN_ON(!wdev->conn)) 389 return false; 390 391 if (!wdev->conn->prev_bssid_valid) 392 return false; 393 394 /* 395 * Some stupid APs don't accept reassoc, so we 396 * need to fall back to trying regular assoc. 397 */ 398 wdev->conn->prev_bssid_valid = false; 399 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 400 schedule_work(&rdev->conn_work); 401 402 return true; 403} 404 405void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) 406{ 407 struct wiphy *wiphy = wdev->wiphy; 408 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 409 410 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; 411 schedule_work(&rdev->conn_work); 412} 413 414void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 415 const u8 *req_ie, size_t req_ie_len, 416 const u8 *resp_ie, size_t resp_ie_len, 417 u16 status, bool wextev, 418 struct cfg80211_bss *bss) 419{ 420 struct wireless_dev *wdev = dev->ieee80211_ptr; 421 const u8 *country_ie; 422#ifdef CONFIG_CFG80211_WEXT 423 union iwreq_data wrqu; 424#endif 425 426 ASSERT_WDEV_LOCK(wdev); 427 428 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 429 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 430 return; 431 432 if (wdev->sme_state != CFG80211_SME_CONNECTING) 433 return; 434 435 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 436 bssid, req_ie, req_ie_len, 437 resp_ie, resp_ie_len, 438 status, GFP_KERNEL); 439 440#ifdef CONFIG_CFG80211_WEXT 441 if (wextev) { 442 if (req_ie && status == WLAN_STATUS_SUCCESS) { 443 memset(&wrqu, 0, sizeof(wrqu)); 444 wrqu.data.length = req_ie_len; 445 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 446 } 447 448 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 449 memset(&wrqu, 0, sizeof(wrqu)); 450 wrqu.data.length = resp_ie_len; 451 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 452 } 453 454 memset(&wrqu, 0, sizeof(wrqu)); 455 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 456 if (bssid && status == WLAN_STATUS_SUCCESS) { 457 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 458 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 459 wdev->wext.prev_bssid_valid = true; 460 } 461 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 462 } 463#endif 464 465 if (wdev->current_bss) { 466 cfg80211_unhold_bss(wdev->current_bss); 467 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 468 wdev->current_bss = NULL; 469 } 470 471 if (wdev->conn) 472 wdev->conn->state = CFG80211_CONN_IDLE; 473 474 if (status != WLAN_STATUS_SUCCESS) { 475 wdev->sme_state = CFG80211_SME_IDLE; 476 if (wdev->conn) 477 kfree(wdev->conn->ie); 478 kfree(wdev->conn); 479 wdev->conn = NULL; 480 kfree(wdev->connect_keys); 481 wdev->connect_keys = NULL; 482 wdev->ssid_len = 0; 483 cfg80211_put_bss(wdev->wiphy, bss); 484 return; 485 } 486 487 if (!bss) 488 bss = cfg80211_get_bss(wdev->wiphy, 489 wdev->conn ? wdev->conn->params.channel : 490 NULL, 491 bssid, 492 wdev->ssid, wdev->ssid_len, 493 WLAN_CAPABILITY_ESS, 494 WLAN_CAPABILITY_ESS); 495 496 if (WARN_ON(!bss)) 497 return; 498 499 cfg80211_hold_bss(bss_from_pub(bss)); 500 wdev->current_bss = bss_from_pub(bss); 501 502 wdev->sme_state = CFG80211_SME_CONNECTED; 503 cfg80211_upload_connect_keys(wdev); 504 505 rcu_read_lock(); 506 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 507 if (!country_ie) { 508 rcu_read_unlock(); 509 return; 510 } 511 512 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 513 rcu_read_unlock(); 514 515 if (!country_ie) 516 return; 517 518 /* 519 * ieee80211_bss_get_ie() ensures we can access: 520 * - country_ie + 2, the start of the country ie data, and 521 * - and country_ie[1] which is the IE length 522 */ 523 regulatory_hint_11d(wdev->wiphy, bss->channel->band, 524 country_ie + 2, country_ie[1]); 525 kfree(country_ie); 526} 527 528void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 529 const u8 *req_ie, size_t req_ie_len, 530 const u8 *resp_ie, size_t resp_ie_len, 531 u16 status, gfp_t gfp) 532{ 533 struct wireless_dev *wdev = dev->ieee80211_ptr; 534 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 535 struct cfg80211_event *ev; 536 unsigned long flags; 537 538 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); 539 540 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 541 if (!ev) 542 return; 543 544 ev->type = EVENT_CONNECT_RESULT; 545 if (bssid) 546 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 547 if (req_ie_len) { 548 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 549 ev->cr.req_ie_len = req_ie_len; 550 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 551 } 552 if (resp_ie_len) { 553 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 554 ev->cr.resp_ie_len = resp_ie_len; 555 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 556 } 557 ev->cr.status = status; 558 559 spin_lock_irqsave(&wdev->event_lock, flags); 560 list_add_tail(&ev->list, &wdev->event_list); 561 spin_unlock_irqrestore(&wdev->event_lock, flags); 562 queue_work(cfg80211_wq, &rdev->event_work); 563} 564EXPORT_SYMBOL(cfg80211_connect_result); 565 566void __cfg80211_roamed(struct wireless_dev *wdev, 567 struct cfg80211_bss *bss, 568 const u8 *req_ie, size_t req_ie_len, 569 const u8 *resp_ie, size_t resp_ie_len) 570{ 571#ifdef CONFIG_CFG80211_WEXT 572 union iwreq_data wrqu; 573#endif 574 ASSERT_WDEV_LOCK(wdev); 575 576 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 577 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 578 goto out; 579 580 if (wdev->sme_state != CFG80211_SME_CONNECTED) 581 goto out; 582 583 /* internal error -- how did we get to CONNECTED w/o BSS? */ 584 if (WARN_ON(!wdev->current_bss)) { 585 goto out; 586 } 587 588 cfg80211_unhold_bss(wdev->current_bss); 589 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 590 wdev->current_bss = NULL; 591 592 cfg80211_hold_bss(bss_from_pub(bss)); 593 wdev->current_bss = bss_from_pub(bss); 594 595 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 596 req_ie, req_ie_len, resp_ie, resp_ie_len, 597 GFP_KERNEL); 598 599#ifdef CONFIG_CFG80211_WEXT 600 if (req_ie) { 601 memset(&wrqu, 0, sizeof(wrqu)); 602 wrqu.data.length = req_ie_len; 603 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 604 &wrqu, req_ie); 605 } 606 607 if (resp_ie) { 608 memset(&wrqu, 0, sizeof(wrqu)); 609 wrqu.data.length = resp_ie_len; 610 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 611 &wrqu, resp_ie); 612 } 613 614 memset(&wrqu, 0, sizeof(wrqu)); 615 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 616 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 617 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 618 wdev->wext.prev_bssid_valid = true; 619 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 620#endif 621 622 return; 623out: 624 cfg80211_put_bss(wdev->wiphy, bss); 625} 626 627void cfg80211_roamed(struct net_device *dev, 628 struct ieee80211_channel *channel, 629 const u8 *bssid, 630 const u8 *req_ie, size_t req_ie_len, 631 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 632{ 633 struct wireless_dev *wdev = dev->ieee80211_ptr; 634 struct cfg80211_bss *bss; 635 636 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 637 638 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 639 wdev->ssid_len, WLAN_CAPABILITY_ESS, 640 WLAN_CAPABILITY_ESS); 641 if (WARN_ON(!bss)) 642 return; 643 644 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 645 resp_ie_len, gfp); 646} 647EXPORT_SYMBOL(cfg80211_roamed); 648 649void cfg80211_roamed_bss(struct net_device *dev, 650 struct cfg80211_bss *bss, const u8 *req_ie, 651 size_t req_ie_len, const u8 *resp_ie, 652 size_t resp_ie_len, gfp_t gfp) 653{ 654 struct wireless_dev *wdev = dev->ieee80211_ptr; 655 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 656 struct cfg80211_event *ev; 657 unsigned long flags; 658 659 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 660 661 if (WARN_ON(!bss)) 662 return; 663 664 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 665 if (!ev) { 666 cfg80211_put_bss(wdev->wiphy, bss); 667 return; 668 } 669 670 ev->type = EVENT_ROAMED; 671 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 672 ev->rm.req_ie_len = req_ie_len; 673 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 674 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 675 ev->rm.resp_ie_len = resp_ie_len; 676 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 677 ev->rm.bss = bss; 678 679 spin_lock_irqsave(&wdev->event_lock, flags); 680 list_add_tail(&ev->list, &wdev->event_list); 681 spin_unlock_irqrestore(&wdev->event_lock, flags); 682 queue_work(cfg80211_wq, &rdev->event_work); 683} 684EXPORT_SYMBOL(cfg80211_roamed_bss); 685 686void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 687 size_t ie_len, u16 reason, bool from_ap) 688{ 689 struct wireless_dev *wdev = dev->ieee80211_ptr; 690 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 691 int i; 692#ifdef CONFIG_CFG80211_WEXT 693 union iwreq_data wrqu; 694#endif 695 696 ASSERT_WDEV_LOCK(wdev); 697 698 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 699 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 700 return; 701 702 if (wdev->sme_state != CFG80211_SME_CONNECTED) 703 return; 704 705 if (wdev->current_bss) { 706 cfg80211_unhold_bss(wdev->current_bss); 707 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 708 } 709 710 wdev->current_bss = NULL; 711 wdev->sme_state = CFG80211_SME_IDLE; 712 wdev->ssid_len = 0; 713 714 if (wdev->conn) { 715 kfree(wdev->conn->ie); 716 wdev->conn->ie = NULL; 717 kfree(wdev->conn); 718 wdev->conn = NULL; 719 } 720 721 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 722 723 /* 724 * Delete all the keys ... pairwise keys can't really 725 * exist any more anyway, but default keys might. 726 */ 727 if (rdev->ops->del_key) 728 for (i = 0; i < 6; i++) 729 rdev_del_key(rdev, dev, i, false, NULL); 730 731#ifdef CONFIG_CFG80211_WEXT 732 memset(&wrqu, 0, sizeof(wrqu)); 733 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 734 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 735 wdev->wext.connect.ssid_len = 0; 736#endif 737 738 schedule_work(&cfg80211_disconnect_work); 739} 740 741void cfg80211_disconnected(struct net_device *dev, u16 reason, 742 u8 *ie, size_t ie_len, gfp_t gfp) 743{ 744 struct wireless_dev *wdev = dev->ieee80211_ptr; 745 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 746 struct cfg80211_event *ev; 747 unsigned long flags; 748 749 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 750 751 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 752 if (!ev) 753 return; 754 755 ev->type = EVENT_DISCONNECTED; 756 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 757 ev->dc.ie_len = ie_len; 758 memcpy((void *)ev->dc.ie, ie, ie_len); 759 ev->dc.reason = reason; 760 761 spin_lock_irqsave(&wdev->event_lock, flags); 762 list_add_tail(&ev->list, &wdev->event_list); 763 spin_unlock_irqrestore(&wdev->event_lock, flags); 764 queue_work(cfg80211_wq, &rdev->event_work); 765} 766EXPORT_SYMBOL(cfg80211_disconnected); 767 768int __cfg80211_connect(struct cfg80211_registered_device *rdev, 769 struct net_device *dev, 770 struct cfg80211_connect_params *connect, 771 struct cfg80211_cached_keys *connkeys, 772 const u8 *prev_bssid) 773{ 774 struct wireless_dev *wdev = dev->ieee80211_ptr; 775 struct cfg80211_bss *bss = NULL; 776 int err; 777 778 ASSERT_WDEV_LOCK(wdev); 779 780 if (wdev->sme_state != CFG80211_SME_IDLE) 781 return -EALREADY; 782 783 if (WARN_ON(wdev->connect_keys)) { 784 kfree(wdev->connect_keys); 785 wdev->connect_keys = NULL; 786 } 787 788 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 789 rdev->wiphy.ht_capa_mod_mask); 790 791 if (connkeys && connkeys->def >= 0) { 792 int idx; 793 u32 cipher; 794 795 idx = connkeys->def; 796 cipher = connkeys->params[idx].cipher; 797 /* If given a WEP key we may need it for shared key auth */ 798 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 799 cipher == WLAN_CIPHER_SUITE_WEP104) { 800 connect->key_idx = idx; 801 connect->key = connkeys->params[idx].key; 802 connect->key_len = connkeys->params[idx].key_len; 803 804 /* 805 * If ciphers are not set (e.g. when going through 806 * iwconfig), we have to set them appropriately here. 807 */ 808 if (connect->crypto.cipher_group == 0) 809 connect->crypto.cipher_group = cipher; 810 811 if (connect->crypto.n_ciphers_pairwise == 0) { 812 connect->crypto.n_ciphers_pairwise = 1; 813 connect->crypto.ciphers_pairwise[0] = cipher; 814 } 815 } 816 } 817 818 if (!rdev->ops->connect) { 819 if (!rdev->ops->auth || !rdev->ops->assoc) 820 return -EOPNOTSUPP; 821 822 if (WARN_ON(wdev->conn)) 823 return -EINPROGRESS; 824 825 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 826 if (!wdev->conn) 827 return -ENOMEM; 828 829 /* 830 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 831 */ 832 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 833 if (connect->bssid) { 834 wdev->conn->params.bssid = wdev->conn->bssid; 835 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 836 } 837 838 if (connect->ie) { 839 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 840 GFP_KERNEL); 841 wdev->conn->params.ie = wdev->conn->ie; 842 if (!wdev->conn->ie) { 843 kfree(wdev->conn); 844 wdev->conn = NULL; 845 return -ENOMEM; 846 } 847 } 848 849 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 850 wdev->conn->auto_auth = true; 851 /* start with open system ... should mostly work */ 852 wdev->conn->params.auth_type = 853 NL80211_AUTHTYPE_OPEN_SYSTEM; 854 } else { 855 wdev->conn->auto_auth = false; 856 } 857 858 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 859 wdev->ssid_len = connect->ssid_len; 860 wdev->conn->params.ssid = wdev->ssid; 861 wdev->conn->params.ssid_len = connect->ssid_len; 862 863 /* see if we have the bss already */ 864 bss = cfg80211_get_conn_bss(wdev); 865 866 wdev->sme_state = CFG80211_SME_CONNECTING; 867 wdev->connect_keys = connkeys; 868 869 if (prev_bssid) { 870 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 871 wdev->conn->prev_bssid_valid = true; 872 } 873 874 /* we're good if we have a matching bss struct */ 875 if (bss) { 876 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 877 err = cfg80211_conn_do_work(wdev); 878 cfg80211_put_bss(wdev->wiphy, bss); 879 } else { 880 /* otherwise we'll need to scan for the AP first */ 881 err = cfg80211_conn_scan(wdev); 882 /* 883 * If we can't scan right now, then we need to scan again 884 * after the current scan finished, since the parameters 885 * changed (unless we find a good AP anyway). 886 */ 887 if (err == -EBUSY) { 888 err = 0; 889 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 890 } 891 } 892 if (err) { 893 kfree(wdev->conn->ie); 894 kfree(wdev->conn); 895 wdev->conn = NULL; 896 wdev->sme_state = CFG80211_SME_IDLE; 897 wdev->connect_keys = NULL; 898 wdev->ssid_len = 0; 899 } 900 901 return err; 902 } else { 903 wdev->sme_state = CFG80211_SME_CONNECTING; 904 wdev->connect_keys = connkeys; 905 err = rdev_connect(rdev, dev, connect); 906 if (err) { 907 wdev->connect_keys = NULL; 908 wdev->sme_state = CFG80211_SME_IDLE; 909 return err; 910 } 911 912 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 913 wdev->ssid_len = connect->ssid_len; 914 915 return 0; 916 } 917} 918 919int cfg80211_connect(struct cfg80211_registered_device *rdev, 920 struct net_device *dev, 921 struct cfg80211_connect_params *connect, 922 struct cfg80211_cached_keys *connkeys) 923{ 924 int err; 925 926 mutex_lock(&rdev->devlist_mtx); 927 wdev_lock(dev->ieee80211_ptr); 928 err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL); 929 wdev_unlock(dev->ieee80211_ptr); 930 mutex_unlock(&rdev->devlist_mtx); 931 932 return err; 933} 934 935int __cfg80211_disconnect(struct cfg80211_registered_device *rdev, 936 struct net_device *dev, u16 reason, bool wextev) 937{ 938 struct wireless_dev *wdev = dev->ieee80211_ptr; 939 int err; 940 941 ASSERT_WDEV_LOCK(wdev); 942 943 if (wdev->sme_state == CFG80211_SME_IDLE) 944 return -EINVAL; 945 946 kfree(wdev->connect_keys); 947 wdev->connect_keys = NULL; 948 949 if (!rdev->ops->disconnect) { 950 if (!rdev->ops->deauth) 951 return -EOPNOTSUPP; 952 953 /* was it connected by userspace SME? */ 954 if (!wdev->conn) { 955 cfg80211_mlme_down(rdev, dev); 956 return 0; 957 } 958 959 if (wdev->sme_state == CFG80211_SME_CONNECTING && 960 (wdev->conn->state == CFG80211_CONN_SCANNING || 961 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { 962 wdev->sme_state = CFG80211_SME_IDLE; 963 kfree(wdev->conn->ie); 964 kfree(wdev->conn); 965 wdev->conn = NULL; 966 wdev->ssid_len = 0; 967 return 0; 968 } 969 970 /* wdev->conn->params.bssid must be set if > SCANNING */ 971 err = __cfg80211_mlme_deauth(rdev, dev, 972 wdev->conn->params.bssid, 973 NULL, 0, reason, false); 974 if (err) 975 return err; 976 } else { 977 err = rdev_disconnect(rdev, dev, reason); 978 if (err) 979 return err; 980 } 981 982 if (wdev->sme_state == CFG80211_SME_CONNECTED) 983 __cfg80211_disconnected(dev, NULL, 0, 0, false); 984 else if (wdev->sme_state == CFG80211_SME_CONNECTING) 985 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, 986 WLAN_STATUS_UNSPECIFIED_FAILURE, 987 wextev, NULL); 988 989 return 0; 990} 991 992int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 993 struct net_device *dev, 994 u16 reason, bool wextev) 995{ 996 int err; 997 998 wdev_lock(dev->ieee80211_ptr); 999 err = __cfg80211_disconnect(rdev, dev, reason, wextev); 1000 wdev_unlock(dev->ieee80211_ptr); 1001 1002 return err; 1003} 1004 1005void cfg80211_sme_disassoc(struct net_device *dev, 1006 struct cfg80211_internal_bss *bss) 1007{ 1008 struct wireless_dev *wdev = dev->ieee80211_ptr; 1009 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 1010 u8 bssid[ETH_ALEN]; 1011 1012 ASSERT_WDEV_LOCK(wdev); 1013 1014 if (!wdev->conn) 1015 return; 1016 1017 if (wdev->conn->state == CFG80211_CONN_IDLE) 1018 return; 1019 1020 /* 1021 * Ok, so the association was made by this SME -- we don't 1022 * want it any more so deauthenticate too. 1023 */ 1024 1025 memcpy(bssid, bss->pub.bssid, ETH_ALEN); 1026 1027 __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 1028 WLAN_REASON_DEAUTH_LEAVING, false); 1029} 1030