sme.c revision 83739b03de97049181d711c95200b94a14d3f693
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 /* 47 * All devices must be idle as otherwise if you are actively 48 * scanning some new beacon hints could be learned and would 49 * count as new regulatory hints. 50 */ 51 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 52 list_for_each_entry(wdev, &rdev->wdev_list, list) { 53 wdev_lock(wdev); 54 if (wdev->sme_state != CFG80211_SME_IDLE) 55 is_all_idle = false; 56 wdev_unlock(wdev); 57 } 58 } 59 60 return is_all_idle; 61} 62 63static void disconnect_work(struct work_struct *work) 64{ 65 rtnl_lock(); 66 if (cfg80211_is_all_idle()) 67 regulatory_hint_disconnect(); 68 rtnl_unlock(); 69} 70 71static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 72 73static int cfg80211_conn_scan(struct wireless_dev *wdev) 74{ 75 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 76 struct cfg80211_scan_request *request; 77 int n_channels, err; 78 79 ASSERT_RTNL(); 80 ASSERT_RDEV_LOCK(rdev); 81 ASSERT_WDEV_LOCK(wdev); 82 83 if (rdev->scan_req) 84 return -EBUSY; 85 86 if (wdev->conn->params.channel) { 87 n_channels = 1; 88 } else { 89 enum ieee80211_band band; 90 n_channels = 0; 91 92 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 93 if (!wdev->wiphy->bands[band]) 94 continue; 95 n_channels += wdev->wiphy->bands[band]->n_channels; 96 } 97 } 98 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 99 sizeof(request->channels[0]) * n_channels, 100 GFP_KERNEL); 101 if (!request) 102 return -ENOMEM; 103 104 if (wdev->conn->params.channel) 105 request->channels[0] = wdev->conn->params.channel; 106 else { 107 int i = 0, j; 108 enum ieee80211_band band; 109 struct ieee80211_supported_band *bands; 110 struct ieee80211_channel *channel; 111 112 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 113 bands = wdev->wiphy->bands[band]; 114 if (!bands) 115 continue; 116 for (j = 0; j < bands->n_channels; j++) { 117 channel = &bands->channels[j]; 118 if (channel->flags & IEEE80211_CHAN_DISABLED) 119 continue; 120 request->channels[i++] = channel; 121 } 122 request->rates[band] = (1 << bands->n_bitrates) - 1; 123 } 124 n_channels = i; 125 } 126 request->n_channels = n_channels; 127 request->ssids = (void *)&request->channels[n_channels]; 128 request->n_ssids = 1; 129 130 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 131 wdev->conn->params.ssid_len); 132 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 133 134 request->wdev = wdev; 135 request->wiphy = &rdev->wiphy; 136 request->scan_start = jiffies; 137 138 rdev->scan_req = request; 139 140 err = rdev_scan(rdev, request); 141 if (!err) { 142 wdev->conn->state = CFG80211_CONN_SCANNING; 143 nl80211_send_scan_start(rdev, wdev); 144 dev_hold(wdev->netdev); 145 } else { 146 rdev->scan_req = NULL; 147 kfree(request); 148 } 149 return err; 150} 151 152static int cfg80211_conn_do_work(struct wireless_dev *wdev) 153{ 154 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 155 struct cfg80211_connect_params *params; 156 struct cfg80211_assoc_request req = {}; 157 int err; 158 159 ASSERT_WDEV_LOCK(wdev); 160 161 if (!wdev->conn) 162 return 0; 163 164 params = &wdev->conn->params; 165 166 switch (wdev->conn->state) { 167 case CFG80211_CONN_SCAN_AGAIN: 168 return cfg80211_conn_scan(wdev); 169 case CFG80211_CONN_AUTHENTICATE_NEXT: 170 BUG_ON(!rdev->ops->auth); 171 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 172 return cfg80211_mlme_auth(rdev, wdev->netdev, 173 params->channel, params->auth_type, 174 params->bssid, 175 params->ssid, params->ssid_len, 176 NULL, 0, 177 params->key, params->key_len, 178 params->key_idx, NULL, 0); 179 case CFG80211_CONN_ASSOCIATE_NEXT: 180 BUG_ON(!rdev->ops->assoc); 181 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 182 if (wdev->conn->prev_bssid_valid) 183 req.prev_bssid = wdev->conn->prev_bssid; 184 req.ie = params->ie; 185 req.ie_len = params->ie_len; 186 req.use_mfp = params->mfp != NL80211_MFP_NO; 187 req.crypto = params->crypto; 188 req.flags = params->flags; 189 req.ht_capa = params->ht_capa; 190 req.ht_capa_mask = params->ht_capa_mask; 191 req.vht_capa = params->vht_capa; 192 req.vht_capa_mask = params->vht_capa_mask; 193 194 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 195 params->bssid, params->ssid, 196 params->ssid_len, &req); 197 if (err) 198 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 199 NULL, 0, 200 WLAN_REASON_DEAUTH_LEAVING, 201 false); 202 return err; 203 case CFG80211_CONN_DEAUTH_ASSOC_FAIL: 204 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 205 NULL, 0, 206 WLAN_REASON_DEAUTH_LEAVING, false); 207 /* return an error so that we call __cfg80211_connect_result() */ 208 return -EINVAL; 209 default: 210 return 0; 211 } 212} 213 214void cfg80211_conn_work(struct work_struct *work) 215{ 216 struct cfg80211_registered_device *rdev = 217 container_of(work, struct cfg80211_registered_device, conn_work); 218 struct wireless_dev *wdev; 219 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 220 221 rtnl_lock(); 222 223 list_for_each_entry(wdev, &rdev->wdev_list, list) { 224 if (!wdev->netdev) 225 continue; 226 227 wdev_lock(wdev); 228 if (!netif_running(wdev->netdev)) { 229 wdev_unlock(wdev); 230 continue; 231 } 232 if (wdev->sme_state != CFG80211_SME_CONNECTING || !wdev->conn) { 233 wdev_unlock(wdev); 234 continue; 235 } 236 if (wdev->conn->params.bssid) { 237 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 238 bssid = bssid_buf; 239 } 240 if (cfg80211_conn_do_work(wdev)) 241 __cfg80211_connect_result( 242 wdev->netdev, bssid, 243 NULL, 0, NULL, 0, 244 WLAN_STATUS_UNSPECIFIED_FAILURE, 245 false, NULL); 246 wdev_unlock(wdev); 247 } 248 249 rtnl_unlock(); 250} 251 252static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 253{ 254 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 255 struct cfg80211_bss *bss; 256 u16 capa = WLAN_CAPABILITY_ESS; 257 258 ASSERT_WDEV_LOCK(wdev); 259 260 if (wdev->conn->params.privacy) 261 capa |= WLAN_CAPABILITY_PRIVACY; 262 263 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 264 wdev->conn->params.bssid, 265 wdev->conn->params.ssid, 266 wdev->conn->params.ssid_len, 267 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 268 capa); 269 if (!bss) 270 return NULL; 271 272 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 273 wdev->conn->params.bssid = wdev->conn->bssid; 274 wdev->conn->params.channel = bss->channel; 275 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 276 schedule_work(&rdev->conn_work); 277 278 return bss; 279} 280 281static void __cfg80211_sme_scan_done(struct net_device *dev) 282{ 283 struct wireless_dev *wdev = dev->ieee80211_ptr; 284 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 285 struct cfg80211_bss *bss; 286 287 ASSERT_WDEV_LOCK(wdev); 288 289 if (wdev->sme_state != CFG80211_SME_CONNECTING) 290 return; 291 292 if (!wdev->conn) 293 return; 294 295 if (wdev->conn->state != CFG80211_CONN_SCANNING && 296 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 297 return; 298 299 bss = cfg80211_get_conn_bss(wdev); 300 if (bss) { 301 cfg80211_put_bss(&rdev->wiphy, bss); 302 } else { 303 /* not found */ 304 if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) 305 schedule_work(&rdev->conn_work); 306 else 307 __cfg80211_connect_result( 308 wdev->netdev, 309 wdev->conn->params.bssid, 310 NULL, 0, NULL, 0, 311 WLAN_STATUS_UNSPECIFIED_FAILURE, 312 false, NULL); 313 } 314} 315 316void cfg80211_sme_scan_done(struct net_device *dev) 317{ 318 struct wireless_dev *wdev = dev->ieee80211_ptr; 319 320 wdev_lock(wdev); 321 __cfg80211_sme_scan_done(dev); 322 wdev_unlock(wdev); 323} 324 325void cfg80211_sme_rx_auth(struct net_device *dev, 326 const u8 *buf, size_t len) 327{ 328 struct wireless_dev *wdev = dev->ieee80211_ptr; 329 struct wiphy *wiphy = wdev->wiphy; 330 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 331 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 332 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 333 334 ASSERT_WDEV_LOCK(wdev); 335 336 /* should only RX auth frames when connecting */ 337 if (wdev->sme_state != CFG80211_SME_CONNECTING) 338 return; 339 340 if (WARN_ON(!wdev->conn)) 341 return; 342 343 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 344 wdev->conn->auto_auth && 345 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 346 /* select automatically between only open, shared, leap */ 347 switch (wdev->conn->params.auth_type) { 348 case NL80211_AUTHTYPE_OPEN_SYSTEM: 349 if (wdev->connect_keys) 350 wdev->conn->params.auth_type = 351 NL80211_AUTHTYPE_SHARED_KEY; 352 else 353 wdev->conn->params.auth_type = 354 NL80211_AUTHTYPE_NETWORK_EAP; 355 break; 356 case NL80211_AUTHTYPE_SHARED_KEY: 357 wdev->conn->params.auth_type = 358 NL80211_AUTHTYPE_NETWORK_EAP; 359 break; 360 default: 361 /* huh? */ 362 wdev->conn->params.auth_type = 363 NL80211_AUTHTYPE_OPEN_SYSTEM; 364 break; 365 } 366 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 367 schedule_work(&rdev->conn_work); 368 } else if (status_code != WLAN_STATUS_SUCCESS) { 369 __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, 370 status_code, false, NULL); 371 } else if (wdev->sme_state == CFG80211_SME_CONNECTING && 372 wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 373 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 374 schedule_work(&rdev->conn_work); 375 } 376} 377 378bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) 379{ 380 struct wiphy *wiphy = wdev->wiphy; 381 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 382 383 if (WARN_ON(!wdev->conn)) 384 return false; 385 386 if (!wdev->conn->prev_bssid_valid) 387 return false; 388 389 /* 390 * Some stupid APs don't accept reassoc, so we 391 * need to fall back to trying regular assoc. 392 */ 393 wdev->conn->prev_bssid_valid = false; 394 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 395 schedule_work(&rdev->conn_work); 396 397 return true; 398} 399 400void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) 401{ 402 struct wiphy *wiphy = wdev->wiphy; 403 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 404 405 wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; 406 schedule_work(&rdev->conn_work); 407} 408 409void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 410 const u8 *req_ie, size_t req_ie_len, 411 const u8 *resp_ie, size_t resp_ie_len, 412 u16 status, bool wextev, 413 struct cfg80211_bss *bss) 414{ 415 struct wireless_dev *wdev = dev->ieee80211_ptr; 416 const u8 *country_ie; 417#ifdef CONFIG_CFG80211_WEXT 418 union iwreq_data wrqu; 419#endif 420 421 ASSERT_WDEV_LOCK(wdev); 422 423 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 424 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 425 return; 426 427 if (wdev->sme_state != CFG80211_SME_CONNECTING) 428 return; 429 430 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 431 bssid, req_ie, req_ie_len, 432 resp_ie, resp_ie_len, 433 status, GFP_KERNEL); 434 435#ifdef CONFIG_CFG80211_WEXT 436 if (wextev) { 437 if (req_ie && status == WLAN_STATUS_SUCCESS) { 438 memset(&wrqu, 0, sizeof(wrqu)); 439 wrqu.data.length = req_ie_len; 440 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 441 } 442 443 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 444 memset(&wrqu, 0, sizeof(wrqu)); 445 wrqu.data.length = resp_ie_len; 446 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 447 } 448 449 memset(&wrqu, 0, sizeof(wrqu)); 450 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 451 if (bssid && status == WLAN_STATUS_SUCCESS) { 452 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 453 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 454 wdev->wext.prev_bssid_valid = true; 455 } 456 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 457 } 458#endif 459 460 if (wdev->current_bss) { 461 cfg80211_unhold_bss(wdev->current_bss); 462 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 463 wdev->current_bss = NULL; 464 } 465 466 if (wdev->conn) 467 wdev->conn->state = CFG80211_CONN_IDLE; 468 469 if (status != WLAN_STATUS_SUCCESS) { 470 wdev->sme_state = CFG80211_SME_IDLE; 471 if (wdev->conn) 472 kfree(wdev->conn->ie); 473 kfree(wdev->conn); 474 wdev->conn = NULL; 475 kfree(wdev->connect_keys); 476 wdev->connect_keys = NULL; 477 wdev->ssid_len = 0; 478 cfg80211_put_bss(wdev->wiphy, bss); 479 return; 480 } 481 482 if (!bss) 483 bss = cfg80211_get_bss(wdev->wiphy, 484 wdev->conn ? wdev->conn->params.channel : 485 NULL, 486 bssid, 487 wdev->ssid, wdev->ssid_len, 488 WLAN_CAPABILITY_ESS, 489 WLAN_CAPABILITY_ESS); 490 491 if (WARN_ON(!bss)) 492 return; 493 494 cfg80211_hold_bss(bss_from_pub(bss)); 495 wdev->current_bss = bss_from_pub(bss); 496 497 wdev->sme_state = CFG80211_SME_CONNECTED; 498 cfg80211_upload_connect_keys(wdev); 499 500 rcu_read_lock(); 501 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 502 if (!country_ie) { 503 rcu_read_unlock(); 504 return; 505 } 506 507 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 508 rcu_read_unlock(); 509 510 if (!country_ie) 511 return; 512 513 /* 514 * ieee80211_bss_get_ie() ensures we can access: 515 * - country_ie + 2, the start of the country ie data, and 516 * - and country_ie[1] which is the IE length 517 */ 518 regulatory_hint_11d(wdev->wiphy, bss->channel->band, 519 country_ie + 2, country_ie[1]); 520 kfree(country_ie); 521} 522 523void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 524 const u8 *req_ie, size_t req_ie_len, 525 const u8 *resp_ie, size_t resp_ie_len, 526 u16 status, gfp_t gfp) 527{ 528 struct wireless_dev *wdev = dev->ieee80211_ptr; 529 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 530 struct cfg80211_event *ev; 531 unsigned long flags; 532 533 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); 534 535 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 536 if (!ev) 537 return; 538 539 ev->type = EVENT_CONNECT_RESULT; 540 if (bssid) 541 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 542 if (req_ie_len) { 543 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 544 ev->cr.req_ie_len = req_ie_len; 545 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 546 } 547 if (resp_ie_len) { 548 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 549 ev->cr.resp_ie_len = resp_ie_len; 550 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 551 } 552 ev->cr.status = status; 553 554 spin_lock_irqsave(&wdev->event_lock, flags); 555 list_add_tail(&ev->list, &wdev->event_list); 556 spin_unlock_irqrestore(&wdev->event_lock, flags); 557 queue_work(cfg80211_wq, &rdev->event_work); 558} 559EXPORT_SYMBOL(cfg80211_connect_result); 560 561void __cfg80211_roamed(struct wireless_dev *wdev, 562 struct cfg80211_bss *bss, 563 const u8 *req_ie, size_t req_ie_len, 564 const u8 *resp_ie, size_t resp_ie_len) 565{ 566#ifdef CONFIG_CFG80211_WEXT 567 union iwreq_data wrqu; 568#endif 569 ASSERT_WDEV_LOCK(wdev); 570 571 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 572 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 573 goto out; 574 575 if (wdev->sme_state != CFG80211_SME_CONNECTED) 576 goto out; 577 578 /* internal error -- how did we get to CONNECTED w/o BSS? */ 579 if (WARN_ON(!wdev->current_bss)) { 580 goto out; 581 } 582 583 cfg80211_unhold_bss(wdev->current_bss); 584 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 585 wdev->current_bss = NULL; 586 587 cfg80211_hold_bss(bss_from_pub(bss)); 588 wdev->current_bss = bss_from_pub(bss); 589 590 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 591 req_ie, req_ie_len, resp_ie, resp_ie_len, 592 GFP_KERNEL); 593 594#ifdef CONFIG_CFG80211_WEXT 595 if (req_ie) { 596 memset(&wrqu, 0, sizeof(wrqu)); 597 wrqu.data.length = req_ie_len; 598 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 599 &wrqu, req_ie); 600 } 601 602 if (resp_ie) { 603 memset(&wrqu, 0, sizeof(wrqu)); 604 wrqu.data.length = resp_ie_len; 605 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 606 &wrqu, resp_ie); 607 } 608 609 memset(&wrqu, 0, sizeof(wrqu)); 610 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 611 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 612 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 613 wdev->wext.prev_bssid_valid = true; 614 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 615#endif 616 617 return; 618out: 619 cfg80211_put_bss(wdev->wiphy, bss); 620} 621 622void cfg80211_roamed(struct net_device *dev, 623 struct ieee80211_channel *channel, 624 const u8 *bssid, 625 const u8 *req_ie, size_t req_ie_len, 626 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 627{ 628 struct wireless_dev *wdev = dev->ieee80211_ptr; 629 struct cfg80211_bss *bss; 630 631 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 632 633 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 634 wdev->ssid_len, WLAN_CAPABILITY_ESS, 635 WLAN_CAPABILITY_ESS); 636 if (WARN_ON(!bss)) 637 return; 638 639 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 640 resp_ie_len, gfp); 641} 642EXPORT_SYMBOL(cfg80211_roamed); 643 644void cfg80211_roamed_bss(struct net_device *dev, 645 struct cfg80211_bss *bss, const u8 *req_ie, 646 size_t req_ie_len, const u8 *resp_ie, 647 size_t resp_ie_len, gfp_t gfp) 648{ 649 struct wireless_dev *wdev = dev->ieee80211_ptr; 650 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 651 struct cfg80211_event *ev; 652 unsigned long flags; 653 654 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 655 656 if (WARN_ON(!bss)) 657 return; 658 659 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 660 if (!ev) { 661 cfg80211_put_bss(wdev->wiphy, bss); 662 return; 663 } 664 665 ev->type = EVENT_ROAMED; 666 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 667 ev->rm.req_ie_len = req_ie_len; 668 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 669 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 670 ev->rm.resp_ie_len = resp_ie_len; 671 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 672 ev->rm.bss = bss; 673 674 spin_lock_irqsave(&wdev->event_lock, flags); 675 list_add_tail(&ev->list, &wdev->event_list); 676 spin_unlock_irqrestore(&wdev->event_lock, flags); 677 queue_work(cfg80211_wq, &rdev->event_work); 678} 679EXPORT_SYMBOL(cfg80211_roamed_bss); 680 681void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 682 size_t ie_len, u16 reason, bool from_ap) 683{ 684 struct wireless_dev *wdev = dev->ieee80211_ptr; 685 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 686 int i; 687#ifdef CONFIG_CFG80211_WEXT 688 union iwreq_data wrqu; 689#endif 690 691 ASSERT_WDEV_LOCK(wdev); 692 693 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 694 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 695 return; 696 697 if (wdev->sme_state != CFG80211_SME_CONNECTED) 698 return; 699 700 if (wdev->current_bss) { 701 cfg80211_unhold_bss(wdev->current_bss); 702 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 703 } 704 705 wdev->current_bss = NULL; 706 wdev->sme_state = CFG80211_SME_IDLE; 707 wdev->ssid_len = 0; 708 709 if (wdev->conn) { 710 kfree(wdev->conn->ie); 711 wdev->conn->ie = NULL; 712 kfree(wdev->conn); 713 wdev->conn = NULL; 714 } 715 716 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 717 718 /* 719 * Delete all the keys ... pairwise keys can't really 720 * exist any more anyway, but default keys might. 721 */ 722 if (rdev->ops->del_key) 723 for (i = 0; i < 6; i++) 724 rdev_del_key(rdev, dev, i, false, NULL); 725 726#ifdef CONFIG_CFG80211_WEXT 727 memset(&wrqu, 0, sizeof(wrqu)); 728 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 729 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 730 wdev->wext.connect.ssid_len = 0; 731#endif 732 733 schedule_work(&cfg80211_disconnect_work); 734} 735 736void cfg80211_disconnected(struct net_device *dev, u16 reason, 737 u8 *ie, size_t ie_len, gfp_t gfp) 738{ 739 struct wireless_dev *wdev = dev->ieee80211_ptr; 740 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 741 struct cfg80211_event *ev; 742 unsigned long flags; 743 744 CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 745 746 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 747 if (!ev) 748 return; 749 750 ev->type = EVENT_DISCONNECTED; 751 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 752 ev->dc.ie_len = ie_len; 753 memcpy((void *)ev->dc.ie, ie, ie_len); 754 ev->dc.reason = reason; 755 756 spin_lock_irqsave(&wdev->event_lock, flags); 757 list_add_tail(&ev->list, &wdev->event_list); 758 spin_unlock_irqrestore(&wdev->event_lock, flags); 759 queue_work(cfg80211_wq, &rdev->event_work); 760} 761EXPORT_SYMBOL(cfg80211_disconnected); 762 763int cfg80211_connect(struct cfg80211_registered_device *rdev, 764 struct net_device *dev, 765 struct cfg80211_connect_params *connect, 766 struct cfg80211_cached_keys *connkeys, 767 const u8 *prev_bssid) 768{ 769 struct wireless_dev *wdev = dev->ieee80211_ptr; 770 struct cfg80211_bss *bss = NULL; 771 int err; 772 773 ASSERT_WDEV_LOCK(wdev); 774 775 if (wdev->sme_state != CFG80211_SME_IDLE) 776 return -EALREADY; 777 778 if (WARN_ON(wdev->connect_keys)) { 779 kfree(wdev->connect_keys); 780 wdev->connect_keys = NULL; 781 } 782 783 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 784 rdev->wiphy.ht_capa_mod_mask); 785 786 if (connkeys && connkeys->def >= 0) { 787 int idx; 788 u32 cipher; 789 790 idx = connkeys->def; 791 cipher = connkeys->params[idx].cipher; 792 /* If given a WEP key we may need it for shared key auth */ 793 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 794 cipher == WLAN_CIPHER_SUITE_WEP104) { 795 connect->key_idx = idx; 796 connect->key = connkeys->params[idx].key; 797 connect->key_len = connkeys->params[idx].key_len; 798 799 /* 800 * If ciphers are not set (e.g. when going through 801 * iwconfig), we have to set them appropriately here. 802 */ 803 if (connect->crypto.cipher_group == 0) 804 connect->crypto.cipher_group = cipher; 805 806 if (connect->crypto.n_ciphers_pairwise == 0) { 807 connect->crypto.n_ciphers_pairwise = 1; 808 connect->crypto.ciphers_pairwise[0] = cipher; 809 } 810 } 811 } 812 813 if (!rdev->ops->connect) { 814 if (!rdev->ops->auth || !rdev->ops->assoc) 815 return -EOPNOTSUPP; 816 817 if (WARN_ON(wdev->conn)) 818 return -EINPROGRESS; 819 820 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 821 if (!wdev->conn) 822 return -ENOMEM; 823 824 /* 825 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 826 */ 827 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 828 if (connect->bssid) { 829 wdev->conn->params.bssid = wdev->conn->bssid; 830 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 831 } 832 833 if (connect->ie) { 834 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 835 GFP_KERNEL); 836 wdev->conn->params.ie = wdev->conn->ie; 837 if (!wdev->conn->ie) { 838 kfree(wdev->conn); 839 wdev->conn = NULL; 840 return -ENOMEM; 841 } 842 } 843 844 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 845 wdev->conn->auto_auth = true; 846 /* start with open system ... should mostly work */ 847 wdev->conn->params.auth_type = 848 NL80211_AUTHTYPE_OPEN_SYSTEM; 849 } else { 850 wdev->conn->auto_auth = false; 851 } 852 853 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 854 wdev->ssid_len = connect->ssid_len; 855 wdev->conn->params.ssid = wdev->ssid; 856 wdev->conn->params.ssid_len = connect->ssid_len; 857 858 /* see if we have the bss already */ 859 bss = cfg80211_get_conn_bss(wdev); 860 861 wdev->sme_state = CFG80211_SME_CONNECTING; 862 wdev->connect_keys = connkeys; 863 864 if (prev_bssid) { 865 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 866 wdev->conn->prev_bssid_valid = true; 867 } 868 869 /* we're good if we have a matching bss struct */ 870 if (bss) { 871 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 872 err = cfg80211_conn_do_work(wdev); 873 cfg80211_put_bss(wdev->wiphy, bss); 874 } else { 875 /* otherwise we'll need to scan for the AP first */ 876 err = cfg80211_conn_scan(wdev); 877 /* 878 * If we can't scan right now, then we need to scan again 879 * after the current scan finished, since the parameters 880 * changed (unless we find a good AP anyway). 881 */ 882 if (err == -EBUSY) { 883 err = 0; 884 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 885 } 886 } 887 if (err) { 888 kfree(wdev->conn->ie); 889 kfree(wdev->conn); 890 wdev->conn = NULL; 891 wdev->sme_state = CFG80211_SME_IDLE; 892 wdev->connect_keys = NULL; 893 wdev->ssid_len = 0; 894 } 895 896 return err; 897 } else { 898 wdev->sme_state = CFG80211_SME_CONNECTING; 899 wdev->connect_keys = connkeys; 900 err = rdev_connect(rdev, dev, connect); 901 if (err) { 902 wdev->connect_keys = NULL; 903 wdev->sme_state = CFG80211_SME_IDLE; 904 return err; 905 } 906 907 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 908 wdev->ssid_len = connect->ssid_len; 909 910 return 0; 911 } 912} 913 914int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 915 struct net_device *dev, u16 reason, bool wextev) 916{ 917 struct wireless_dev *wdev = dev->ieee80211_ptr; 918 int err; 919 920 ASSERT_WDEV_LOCK(wdev); 921 922 if (wdev->sme_state == CFG80211_SME_IDLE) 923 return -EINVAL; 924 925 kfree(wdev->connect_keys); 926 wdev->connect_keys = NULL; 927 928 if (!rdev->ops->disconnect) { 929 if (!rdev->ops->deauth) 930 return -EOPNOTSUPP; 931 932 /* was it connected by userspace SME? */ 933 if (!wdev->conn) { 934 cfg80211_mlme_down(rdev, dev); 935 goto disconnect; 936 } 937 938 if (wdev->sme_state == CFG80211_SME_CONNECTING && 939 (wdev->conn->state == CFG80211_CONN_SCANNING || 940 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { 941 wdev->sme_state = CFG80211_SME_IDLE; 942 kfree(wdev->conn->ie); 943 kfree(wdev->conn); 944 wdev->conn = NULL; 945 wdev->ssid_len = 0; 946 return 0; 947 } 948 949 /* wdev->conn->params.bssid must be set if > SCANNING */ 950 err = cfg80211_mlme_deauth(rdev, dev, 951 wdev->conn->params.bssid, 952 NULL, 0, reason, false); 953 if (err) 954 return err; 955 } else { 956 err = rdev_disconnect(rdev, dev, reason); 957 if (err) 958 return err; 959 } 960 961 disconnect: 962 if (wdev->sme_state == CFG80211_SME_CONNECTED) 963 __cfg80211_disconnected(dev, NULL, 0, 0, false); 964 else if (wdev->sme_state == CFG80211_SME_CONNECTING) 965 __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, 966 WLAN_STATUS_UNSPECIFIED_FAILURE, 967 wextev, NULL); 968 969 return 0; 970} 971 972void cfg80211_sme_disassoc(struct net_device *dev, 973 struct cfg80211_internal_bss *bss) 974{ 975 struct wireless_dev *wdev = dev->ieee80211_ptr; 976 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 977 u8 bssid[ETH_ALEN]; 978 979 ASSERT_WDEV_LOCK(wdev); 980 981 if (!wdev->conn) 982 return; 983 984 if (wdev->conn->state == CFG80211_CONN_IDLE) 985 return; 986 987 /* 988 * Ok, so the association was made by this SME -- we don't 989 * want it any more so deauthenticate too. 990 */ 991 992 memcpy(bssid, bss->pub.bssid, ETH_ALEN); 993 994 cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, 995 WLAN_REASON_DEAUTH_LEAVING, false); 996} 997