sme.c revision fa9ffc745610f31c6bc136d5a6a1782e00870e72
1/* 2 * SME code for cfg80211 3 * both driver SME event handling and the SME implementation 4 * (for nl80211's connect() and wext) 5 * 6 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> 7 * Copyright (C) 2009 Intel Corporation. All rights reserved. 8 */ 9 10#include <linux/etherdevice.h> 11#include <linux/if_arp.h> 12#include <linux/slab.h> 13#include <linux/workqueue.h> 14#include <linux/wireless.h> 15#include <linux/export.h> 16#include <net/iw_handler.h> 17#include <net/cfg80211.h> 18#include <net/rtnetlink.h> 19#include "nl80211.h" 20#include "reg.h" 21#include "rdev-ops.h" 22 23/* 24 * Software SME in cfg80211, using auth/assoc/deauth calls to the 25 * driver. This is is for implementing nl80211's connect/disconnect 26 * and wireless extensions (if configured.) 27 */ 28 29struct cfg80211_conn { 30 struct cfg80211_connect_params params; 31 /* these are sub-states of the _CONNECTING sme_state */ 32 enum { 33 CFG80211_CONN_SCANNING, 34 CFG80211_CONN_SCAN_AGAIN, 35 CFG80211_CONN_AUTHENTICATE_NEXT, 36 CFG80211_CONN_AUTHENTICATING, 37 CFG80211_CONN_AUTH_FAILED, 38 CFG80211_CONN_ASSOCIATE_NEXT, 39 CFG80211_CONN_ASSOCIATING, 40 CFG80211_CONN_ASSOC_FAILED, 41 CFG80211_CONN_DEAUTH, 42 CFG80211_CONN_CONNECTED, 43 } state; 44 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; 45 u8 *ie; 46 size_t ie_len; 47 bool auto_auth, prev_bssid_valid; 48}; 49 50static void cfg80211_sme_free(struct wireless_dev *wdev) 51{ 52 if (!wdev->conn) 53 return; 54 55 kfree(wdev->conn->ie); 56 kfree(wdev->conn); 57 wdev->conn = NULL; 58} 59 60static int cfg80211_conn_scan(struct wireless_dev *wdev) 61{ 62 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 63 struct cfg80211_scan_request *request; 64 int n_channels, err; 65 66 ASSERT_RTNL(); 67 ASSERT_RDEV_LOCK(rdev); 68 ASSERT_WDEV_LOCK(wdev); 69 70 if (rdev->scan_req) 71 return -EBUSY; 72 73 if (wdev->conn->params.channel) { 74 n_channels = 1; 75 } else { 76 enum ieee80211_band band; 77 n_channels = 0; 78 79 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 80 if (!wdev->wiphy->bands[band]) 81 continue; 82 n_channels += wdev->wiphy->bands[band]->n_channels; 83 } 84 } 85 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 86 sizeof(request->channels[0]) * n_channels, 87 GFP_KERNEL); 88 if (!request) 89 return -ENOMEM; 90 91 if (wdev->conn->params.channel) 92 request->channels[0] = wdev->conn->params.channel; 93 else { 94 int i = 0, j; 95 enum ieee80211_band band; 96 struct ieee80211_supported_band *bands; 97 struct ieee80211_channel *channel; 98 99 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 100 bands = wdev->wiphy->bands[band]; 101 if (!bands) 102 continue; 103 for (j = 0; j < bands->n_channels; j++) { 104 channel = &bands->channels[j]; 105 if (channel->flags & IEEE80211_CHAN_DISABLED) 106 continue; 107 request->channels[i++] = channel; 108 } 109 request->rates[band] = (1 << bands->n_bitrates) - 1; 110 } 111 n_channels = i; 112 } 113 request->n_channels = n_channels; 114 request->ssids = (void *)&request->channels[n_channels]; 115 request->n_ssids = 1; 116 117 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 118 wdev->conn->params.ssid_len); 119 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 120 121 request->wdev = wdev; 122 request->wiphy = &rdev->wiphy; 123 request->scan_start = jiffies; 124 125 rdev->scan_req = request; 126 127 err = rdev_scan(rdev, request); 128 if (!err) { 129 wdev->conn->state = CFG80211_CONN_SCANNING; 130 nl80211_send_scan_start(rdev, wdev); 131 dev_hold(wdev->netdev); 132 } else { 133 rdev->scan_req = NULL; 134 kfree(request); 135 } 136 return err; 137} 138 139static int cfg80211_conn_do_work(struct wireless_dev *wdev) 140{ 141 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 142 struct cfg80211_connect_params *params; 143 struct cfg80211_assoc_request req = {}; 144 int err; 145 146 ASSERT_WDEV_LOCK(wdev); 147 148 if (!wdev->conn) 149 return 0; 150 151 params = &wdev->conn->params; 152 153 switch (wdev->conn->state) { 154 case CFG80211_CONN_SCANNING: 155 /* didn't find it during scan ... */ 156 return -ENOENT; 157 case CFG80211_CONN_SCAN_AGAIN: 158 return cfg80211_conn_scan(wdev); 159 case CFG80211_CONN_AUTHENTICATE_NEXT: 160 BUG_ON(!rdev->ops->auth); 161 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 162 return cfg80211_mlme_auth(rdev, wdev->netdev, 163 params->channel, params->auth_type, 164 params->bssid, 165 params->ssid, params->ssid_len, 166 NULL, 0, 167 params->key, params->key_len, 168 params->key_idx, NULL, 0); 169 case CFG80211_CONN_AUTH_FAILED: 170 return -ENOTCONN; 171 case CFG80211_CONN_ASSOCIATE_NEXT: 172 BUG_ON(!rdev->ops->assoc); 173 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 174 if (wdev->conn->prev_bssid_valid) 175 req.prev_bssid = wdev->conn->prev_bssid; 176 req.ie = params->ie; 177 req.ie_len = params->ie_len; 178 req.use_mfp = params->mfp != NL80211_MFP_NO; 179 req.crypto = params->crypto; 180 req.flags = params->flags; 181 req.ht_capa = params->ht_capa; 182 req.ht_capa_mask = params->ht_capa_mask; 183 req.vht_capa = params->vht_capa; 184 req.vht_capa_mask = params->vht_capa_mask; 185 186 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 187 params->bssid, params->ssid, 188 params->ssid_len, &req); 189 if (err) 190 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 191 NULL, 0, 192 WLAN_REASON_DEAUTH_LEAVING, 193 false); 194 return err; 195 case CFG80211_CONN_ASSOC_FAILED: 196 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 197 NULL, 0, 198 WLAN_REASON_DEAUTH_LEAVING, false); 199 return -ENOTCONN; 200 case CFG80211_CONN_DEAUTH: 201 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 202 NULL, 0, 203 WLAN_REASON_DEAUTH_LEAVING, false); 204 /* free directly, disconnected event already sent */ 205 cfg80211_sme_free(wdev); 206 return 0; 207 default: 208 return 0; 209 } 210} 211 212void cfg80211_conn_work(struct work_struct *work) 213{ 214 struct cfg80211_registered_device *rdev = 215 container_of(work, struct cfg80211_registered_device, conn_work); 216 struct wireless_dev *wdev; 217 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 218 219 rtnl_lock(); 220 221 list_for_each_entry(wdev, &rdev->wdev_list, list) { 222 if (!wdev->netdev) 223 continue; 224 225 wdev_lock(wdev); 226 if (!netif_running(wdev->netdev)) { 227 wdev_unlock(wdev); 228 continue; 229 } 230 if (!wdev->conn || 231 wdev->conn->state == CFG80211_CONN_CONNECTED) { 232 wdev_unlock(wdev); 233 continue; 234 } 235 if (wdev->conn->params.bssid) { 236 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 237 bssid = bssid_buf; 238 } 239 if (cfg80211_conn_do_work(wdev)) { 240 __cfg80211_connect_result( 241 wdev->netdev, bssid, 242 NULL, 0, NULL, 0, 243 WLAN_STATUS_UNSPECIFIED_FAILURE, 244 false, NULL); 245 cfg80211_sme_free(wdev); 246 } 247 wdev_unlock(wdev); 248 } 249 250 rtnl_unlock(); 251} 252 253/* Returned bss is reference counted and must be cleaned up appropriately. */ 254static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 255{ 256 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 257 struct cfg80211_bss *bss; 258 u16 capa = WLAN_CAPABILITY_ESS; 259 260 ASSERT_WDEV_LOCK(wdev); 261 262 if (wdev->conn->params.privacy) 263 capa |= WLAN_CAPABILITY_PRIVACY; 264 265 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 266 wdev->conn->params.bssid, 267 wdev->conn->params.ssid, 268 wdev->conn->params.ssid_len, 269 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 270 capa); 271 if (!bss) 272 return NULL; 273 274 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 275 wdev->conn->params.bssid = wdev->conn->bssid; 276 wdev->conn->params.channel = bss->channel; 277 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 278 schedule_work(&rdev->conn_work); 279 280 return bss; 281} 282 283static void __cfg80211_sme_scan_done(struct net_device *dev) 284{ 285 struct wireless_dev *wdev = dev->ieee80211_ptr; 286 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 287 struct cfg80211_bss *bss; 288 289 ASSERT_WDEV_LOCK(wdev); 290 291 if (!wdev->conn) 292 return; 293 294 if (wdev->conn->state != CFG80211_CONN_SCANNING && 295 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 296 return; 297 298 bss = cfg80211_get_conn_bss(wdev); 299 if (bss) 300 cfg80211_put_bss(&rdev->wiphy, bss); 301 else 302 schedule_work(&rdev->conn_work); 303} 304 305void cfg80211_sme_scan_done(struct net_device *dev) 306{ 307 struct wireless_dev *wdev = dev->ieee80211_ptr; 308 309 wdev_lock(wdev); 310 __cfg80211_sme_scan_done(dev); 311 wdev_unlock(wdev); 312} 313 314void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 315{ 316 struct wiphy *wiphy = wdev->wiphy; 317 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 318 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 319 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 320 321 ASSERT_WDEV_LOCK(wdev); 322 323 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 324 return; 325 326 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 327 wdev->conn->auto_auth && 328 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 329 /* select automatically between only open, shared, leap */ 330 switch (wdev->conn->params.auth_type) { 331 case NL80211_AUTHTYPE_OPEN_SYSTEM: 332 if (wdev->connect_keys) 333 wdev->conn->params.auth_type = 334 NL80211_AUTHTYPE_SHARED_KEY; 335 else 336 wdev->conn->params.auth_type = 337 NL80211_AUTHTYPE_NETWORK_EAP; 338 break; 339 case NL80211_AUTHTYPE_SHARED_KEY: 340 wdev->conn->params.auth_type = 341 NL80211_AUTHTYPE_NETWORK_EAP; 342 break; 343 default: 344 /* huh? */ 345 wdev->conn->params.auth_type = 346 NL80211_AUTHTYPE_OPEN_SYSTEM; 347 break; 348 } 349 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 350 schedule_work(&rdev->conn_work); 351 } else if (status_code != WLAN_STATUS_SUCCESS) { 352 __cfg80211_connect_result(wdev->netdev, mgmt->bssid, 353 NULL, 0, NULL, 0, 354 status_code, false, NULL); 355 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 356 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 357 schedule_work(&rdev->conn_work); 358 } 359} 360 361bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 362{ 363 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 364 365 if (!wdev->conn) 366 return false; 367 368 if (status == WLAN_STATUS_SUCCESS) { 369 wdev->conn->state = CFG80211_CONN_CONNECTED; 370 return false; 371 } 372 373 if (wdev->conn->prev_bssid_valid) { 374 /* 375 * Some stupid APs don't accept reassoc, so we 376 * need to fall back to trying regular assoc; 377 * return true so no event is sent to userspace. 378 */ 379 wdev->conn->prev_bssid_valid = false; 380 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 381 schedule_work(&rdev->conn_work); 382 return true; 383 } 384 385 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 386 schedule_work(&rdev->conn_work); 387 return false; 388} 389 390void cfg80211_sme_deauth(struct wireless_dev *wdev) 391{ 392 cfg80211_sme_free(wdev); 393} 394 395void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 396{ 397 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 398 399 if (!wdev->conn) 400 return; 401 402 wdev->conn->state = CFG80211_CONN_AUTH_FAILED; 403 schedule_work(&rdev->conn_work); 404} 405 406void cfg80211_sme_disassoc(struct wireless_dev *wdev) 407{ 408 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 409 410 if (!wdev->conn) 411 return; 412 413 wdev->conn->state = CFG80211_CONN_DEAUTH; 414 schedule_work(&rdev->conn_work); 415} 416 417void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 418{ 419 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 420 421 if (!wdev->conn) 422 return; 423 424 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 425 schedule_work(&rdev->conn_work); 426} 427 428static int cfg80211_sme_connect(struct wireless_dev *wdev, 429 struct cfg80211_connect_params *connect, 430 const u8 *prev_bssid) 431{ 432 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 433 struct cfg80211_bss *bss; 434 int err; 435 436 if (!rdev->ops->auth || !rdev->ops->assoc) 437 return -EOPNOTSUPP; 438 439 if (wdev->current_bss) 440 return -EALREADY; 441 442 if (WARN_ON(wdev->conn)) 443 return -EINPROGRESS; 444 445 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 446 if (!wdev->conn) 447 return -ENOMEM; 448 449 /* 450 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 451 */ 452 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 453 if (connect->bssid) { 454 wdev->conn->params.bssid = wdev->conn->bssid; 455 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 456 } 457 458 if (connect->ie) { 459 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 460 GFP_KERNEL); 461 wdev->conn->params.ie = wdev->conn->ie; 462 if (!wdev->conn->ie) { 463 kfree(wdev->conn); 464 wdev->conn = NULL; 465 return -ENOMEM; 466 } 467 } 468 469 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 470 wdev->conn->auto_auth = true; 471 /* start with open system ... should mostly work */ 472 wdev->conn->params.auth_type = 473 NL80211_AUTHTYPE_OPEN_SYSTEM; 474 } else { 475 wdev->conn->auto_auth = false; 476 } 477 478 wdev->conn->params.ssid = wdev->ssid; 479 wdev->conn->params.ssid_len = connect->ssid_len; 480 481 /* see if we have the bss already */ 482 bss = cfg80211_get_conn_bss(wdev); 483 484 if (prev_bssid) { 485 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 486 wdev->conn->prev_bssid_valid = true; 487 } 488 489 /* we're good if we have a matching bss struct */ 490 if (bss) { 491 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 492 err = cfg80211_conn_do_work(wdev); 493 cfg80211_put_bss(wdev->wiphy, bss); 494 } else { 495 /* otherwise we'll need to scan for the AP first */ 496 err = cfg80211_conn_scan(wdev); 497 498 /* 499 * If we can't scan right now, then we need to scan again 500 * after the current scan finished, since the parameters 501 * changed (unless we find a good AP anyway). 502 */ 503 if (err == -EBUSY) { 504 err = 0; 505 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 506 } 507 } 508 509 if (err) 510 cfg80211_sme_free(wdev); 511 512 return err; 513} 514 515static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 516{ 517 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 518 int err; 519 520 if (!wdev->conn) 521 return 0; 522 523 if (!rdev->ops->deauth) 524 return -EOPNOTSUPP; 525 526 if (wdev->conn->state == CFG80211_CONN_SCANNING || 527 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 528 err = 0; 529 goto out; 530 } 531 532 /* wdev->conn->params.bssid must be set if > SCANNING */ 533 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 534 wdev->conn->params.bssid, 535 NULL, 0, reason, false); 536 out: 537 cfg80211_sme_free(wdev); 538 return err; 539} 540 541/* 542 * code shared for in-device and software SME 543 */ 544 545static bool cfg80211_is_all_idle(void) 546{ 547 struct cfg80211_registered_device *rdev; 548 struct wireless_dev *wdev; 549 bool is_all_idle = true; 550 551 /* 552 * All devices must be idle as otherwise if you are actively 553 * scanning some new beacon hints could be learned and would 554 * count as new regulatory hints. 555 */ 556 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 557 list_for_each_entry(wdev, &rdev->wdev_list, list) { 558 wdev_lock(wdev); 559 if (wdev->conn || wdev->current_bss) 560 is_all_idle = false; 561 wdev_unlock(wdev); 562 } 563 } 564 565 return is_all_idle; 566} 567 568static void disconnect_work(struct work_struct *work) 569{ 570 rtnl_lock(); 571 if (cfg80211_is_all_idle()) 572 regulatory_hint_disconnect(); 573 rtnl_unlock(); 574} 575 576static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 577 578 579/* 580 * API calls for drivers implementing connect/disconnect and 581 * SME event handling 582 */ 583 584/* This method must consume bss one way or another */ 585void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 586 const u8 *req_ie, size_t req_ie_len, 587 const u8 *resp_ie, size_t resp_ie_len, 588 u16 status, bool wextev, 589 struct cfg80211_bss *bss) 590{ 591 struct wireless_dev *wdev = dev->ieee80211_ptr; 592 const u8 *country_ie; 593#ifdef CONFIG_CFG80211_WEXT 594 union iwreq_data wrqu; 595#endif 596 597 ASSERT_WDEV_LOCK(wdev); 598 599 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 600 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 601 cfg80211_put_bss(wdev->wiphy, bss); 602 return; 603 } 604 605 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 606 bssid, req_ie, req_ie_len, 607 resp_ie, resp_ie_len, 608 status, GFP_KERNEL); 609 610#ifdef CONFIG_CFG80211_WEXT 611 if (wextev) { 612 if (req_ie && status == WLAN_STATUS_SUCCESS) { 613 memset(&wrqu, 0, sizeof(wrqu)); 614 wrqu.data.length = req_ie_len; 615 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 616 } 617 618 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 619 memset(&wrqu, 0, sizeof(wrqu)); 620 wrqu.data.length = resp_ie_len; 621 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 622 } 623 624 memset(&wrqu, 0, sizeof(wrqu)); 625 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 626 if (bssid && status == WLAN_STATUS_SUCCESS) { 627 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 628 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 629 wdev->wext.prev_bssid_valid = true; 630 } 631 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 632 } 633#endif 634 635 if (wdev->current_bss) { 636 cfg80211_unhold_bss(wdev->current_bss); 637 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 638 wdev->current_bss = NULL; 639 } 640 641 if (status != WLAN_STATUS_SUCCESS) { 642 kfree(wdev->connect_keys); 643 wdev->connect_keys = NULL; 644 wdev->ssid_len = 0; 645 if (bss) { 646 cfg80211_unhold_bss(bss_from_pub(bss)); 647 cfg80211_put_bss(wdev->wiphy, bss); 648 } 649 return; 650 } 651 652 if (!bss) { 653 WARN_ON_ONCE(!wiphy_to_dev(wdev->wiphy)->ops->connect); 654 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, 655 wdev->ssid, wdev->ssid_len, 656 WLAN_CAPABILITY_ESS, 657 WLAN_CAPABILITY_ESS); 658 if (WARN_ON(!bss)) 659 return; 660 cfg80211_hold_bss(bss_from_pub(bss)); 661 } 662 663 wdev->current_bss = bss_from_pub(bss); 664 665 cfg80211_upload_connect_keys(wdev); 666 667 rcu_read_lock(); 668 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 669 if (!country_ie) { 670 rcu_read_unlock(); 671 return; 672 } 673 674 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 675 rcu_read_unlock(); 676 677 if (!country_ie) 678 return; 679 680 /* 681 * ieee80211_bss_get_ie() ensures we can access: 682 * - country_ie + 2, the start of the country ie data, and 683 * - and country_ie[1] which is the IE length 684 */ 685 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band, 686 country_ie + 2, country_ie[1]); 687 kfree(country_ie); 688} 689 690void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 691 const u8 *req_ie, size_t req_ie_len, 692 const u8 *resp_ie, size_t resp_ie_len, 693 u16 status, gfp_t gfp) 694{ 695 struct wireless_dev *wdev = dev->ieee80211_ptr; 696 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 697 struct cfg80211_event *ev; 698 unsigned long flags; 699 700 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 701 if (!ev) 702 return; 703 704 ev->type = EVENT_CONNECT_RESULT; 705 if (bssid) 706 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 707 if (req_ie_len) { 708 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 709 ev->cr.req_ie_len = req_ie_len; 710 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 711 } 712 if (resp_ie_len) { 713 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 714 ev->cr.resp_ie_len = resp_ie_len; 715 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 716 } 717 ev->cr.status = status; 718 719 spin_lock_irqsave(&wdev->event_lock, flags); 720 list_add_tail(&ev->list, &wdev->event_list); 721 spin_unlock_irqrestore(&wdev->event_lock, flags); 722 queue_work(cfg80211_wq, &rdev->event_work); 723} 724EXPORT_SYMBOL(cfg80211_connect_result); 725 726/* Consumes bss object one way or another */ 727void __cfg80211_roamed(struct wireless_dev *wdev, 728 struct cfg80211_bss *bss, 729 const u8 *req_ie, size_t req_ie_len, 730 const u8 *resp_ie, size_t resp_ie_len) 731{ 732#ifdef CONFIG_CFG80211_WEXT 733 union iwreq_data wrqu; 734#endif 735 ASSERT_WDEV_LOCK(wdev); 736 737 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 738 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 739 goto out; 740 741 if (WARN_ON(!wdev->current_bss)) 742 goto out; 743 744 cfg80211_unhold_bss(wdev->current_bss); 745 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 746 wdev->current_bss = NULL; 747 748 cfg80211_hold_bss(bss_from_pub(bss)); 749 wdev->current_bss = bss_from_pub(bss); 750 751 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 752 req_ie, req_ie_len, resp_ie, resp_ie_len, 753 GFP_KERNEL); 754 755#ifdef CONFIG_CFG80211_WEXT 756 if (req_ie) { 757 memset(&wrqu, 0, sizeof(wrqu)); 758 wrqu.data.length = req_ie_len; 759 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 760 &wrqu, req_ie); 761 } 762 763 if (resp_ie) { 764 memset(&wrqu, 0, sizeof(wrqu)); 765 wrqu.data.length = resp_ie_len; 766 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 767 &wrqu, resp_ie); 768 } 769 770 memset(&wrqu, 0, sizeof(wrqu)); 771 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 772 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 773 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 774 wdev->wext.prev_bssid_valid = true; 775 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 776#endif 777 778 return; 779out: 780 cfg80211_put_bss(wdev->wiphy, bss); 781} 782 783void cfg80211_roamed(struct net_device *dev, 784 struct ieee80211_channel *channel, 785 const u8 *bssid, 786 const u8 *req_ie, size_t req_ie_len, 787 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 788{ 789 struct wireless_dev *wdev = dev->ieee80211_ptr; 790 struct cfg80211_bss *bss; 791 792 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 793 wdev->ssid_len, WLAN_CAPABILITY_ESS, 794 WLAN_CAPABILITY_ESS); 795 if (WARN_ON(!bss)) 796 return; 797 798 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 799 resp_ie_len, gfp); 800} 801EXPORT_SYMBOL(cfg80211_roamed); 802 803/* Consumes bss object one way or another */ 804void cfg80211_roamed_bss(struct net_device *dev, 805 struct cfg80211_bss *bss, const u8 *req_ie, 806 size_t req_ie_len, const u8 *resp_ie, 807 size_t resp_ie_len, gfp_t gfp) 808{ 809 struct wireless_dev *wdev = dev->ieee80211_ptr; 810 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 811 struct cfg80211_event *ev; 812 unsigned long flags; 813 814 if (WARN_ON(!bss)) 815 return; 816 817 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 818 if (!ev) { 819 cfg80211_put_bss(wdev->wiphy, bss); 820 return; 821 } 822 823 ev->type = EVENT_ROAMED; 824 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 825 ev->rm.req_ie_len = req_ie_len; 826 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 827 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 828 ev->rm.resp_ie_len = resp_ie_len; 829 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 830 ev->rm.bss = bss; 831 832 spin_lock_irqsave(&wdev->event_lock, flags); 833 list_add_tail(&ev->list, &wdev->event_list); 834 spin_unlock_irqrestore(&wdev->event_lock, flags); 835 queue_work(cfg80211_wq, &rdev->event_work); 836} 837EXPORT_SYMBOL(cfg80211_roamed_bss); 838 839void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 840 size_t ie_len, u16 reason, bool from_ap) 841{ 842 struct wireless_dev *wdev = dev->ieee80211_ptr; 843 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 844 int i; 845#ifdef CONFIG_CFG80211_WEXT 846 union iwreq_data wrqu; 847#endif 848 849 ASSERT_WDEV_LOCK(wdev); 850 851 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 852 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 853 return; 854 855 if (wdev->current_bss) { 856 cfg80211_unhold_bss(wdev->current_bss); 857 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 858 } 859 860 wdev->current_bss = NULL; 861 wdev->ssid_len = 0; 862 863 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 864 865 /* 866 * Delete all the keys ... pairwise keys can't really 867 * exist any more anyway, but default keys might. 868 */ 869 if (rdev->ops->del_key) 870 for (i = 0; i < 6; i++) 871 rdev_del_key(rdev, dev, i, false, NULL); 872 873 rdev_set_qos_map(rdev, dev, NULL); 874 875#ifdef CONFIG_CFG80211_WEXT 876 memset(&wrqu, 0, sizeof(wrqu)); 877 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 878 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 879 wdev->wext.connect.ssid_len = 0; 880#endif 881 882 schedule_work(&cfg80211_disconnect_work); 883} 884 885void cfg80211_disconnected(struct net_device *dev, u16 reason, 886 u8 *ie, size_t ie_len, gfp_t gfp) 887{ 888 struct wireless_dev *wdev = dev->ieee80211_ptr; 889 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 890 struct cfg80211_event *ev; 891 unsigned long flags; 892 893 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 894 if (!ev) 895 return; 896 897 ev->type = EVENT_DISCONNECTED; 898 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 899 ev->dc.ie_len = ie_len; 900 memcpy((void *)ev->dc.ie, ie, ie_len); 901 ev->dc.reason = reason; 902 903 spin_lock_irqsave(&wdev->event_lock, flags); 904 list_add_tail(&ev->list, &wdev->event_list); 905 spin_unlock_irqrestore(&wdev->event_lock, flags); 906 queue_work(cfg80211_wq, &rdev->event_work); 907} 908EXPORT_SYMBOL(cfg80211_disconnected); 909 910/* 911 * API calls for nl80211/wext compatibility code 912 */ 913int cfg80211_connect(struct cfg80211_registered_device *rdev, 914 struct net_device *dev, 915 struct cfg80211_connect_params *connect, 916 struct cfg80211_cached_keys *connkeys, 917 const u8 *prev_bssid) 918{ 919 struct wireless_dev *wdev = dev->ieee80211_ptr; 920 int err; 921 922 ASSERT_WDEV_LOCK(wdev); 923 924 if (WARN_ON(wdev->connect_keys)) { 925 kfree(wdev->connect_keys); 926 wdev->connect_keys = NULL; 927 } 928 929 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 930 rdev->wiphy.ht_capa_mod_mask); 931 932 if (connkeys && connkeys->def >= 0) { 933 int idx; 934 u32 cipher; 935 936 idx = connkeys->def; 937 cipher = connkeys->params[idx].cipher; 938 /* If given a WEP key we may need it for shared key auth */ 939 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 940 cipher == WLAN_CIPHER_SUITE_WEP104) { 941 connect->key_idx = idx; 942 connect->key = connkeys->params[idx].key; 943 connect->key_len = connkeys->params[idx].key_len; 944 945 /* 946 * If ciphers are not set (e.g. when going through 947 * iwconfig), we have to set them appropriately here. 948 */ 949 if (connect->crypto.cipher_group == 0) 950 connect->crypto.cipher_group = cipher; 951 952 if (connect->crypto.n_ciphers_pairwise == 0) { 953 connect->crypto.n_ciphers_pairwise = 1; 954 connect->crypto.ciphers_pairwise[0] = cipher; 955 } 956 } 957 } 958 959 wdev->connect_keys = connkeys; 960 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 961 wdev->ssid_len = connect->ssid_len; 962 963 if (!rdev->ops->connect) 964 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 965 else 966 err = rdev_connect(rdev, dev, connect); 967 968 if (err) { 969 wdev->connect_keys = NULL; 970 wdev->ssid_len = 0; 971 return err; 972 } 973 974 return 0; 975} 976 977int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 978 struct net_device *dev, u16 reason, bool wextev) 979{ 980 struct wireless_dev *wdev = dev->ieee80211_ptr; 981 int err = 0; 982 983 ASSERT_WDEV_LOCK(wdev); 984 985 kfree(wdev->connect_keys); 986 wdev->connect_keys = NULL; 987 988 if (wdev->conn) 989 err = cfg80211_sme_disconnect(wdev, reason); 990 else if (!rdev->ops->disconnect) 991 cfg80211_mlme_down(rdev, dev); 992 else if (wdev->current_bss) 993 err = rdev_disconnect(rdev, dev, reason); 994 995 return err; 996} 997