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 29 struct 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 50 static 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 60 static 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_WDEV_LOCK(wdev); 68 69 if (rdev->scan_req || rdev->scan_msg) 70 return -EBUSY; 71 72 if (wdev->conn->params.channel) 73 n_channels = 1; 74 else 75 n_channels = ieee80211_get_num_supported_channels(wdev->wiphy); 76 77 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 78 sizeof(request->channels[0]) * n_channels, 79 GFP_KERNEL); 80 if (!request) 81 return -ENOMEM; 82 83 if (wdev->conn->params.channel) 84 request->channels[0] = wdev->conn->params.channel; 85 else { 86 int i = 0, j; 87 enum ieee80211_band band; 88 struct ieee80211_supported_band *bands; 89 struct ieee80211_channel *channel; 90 91 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 92 bands = wdev->wiphy->bands[band]; 93 if (!bands) 94 continue; 95 for (j = 0; j < bands->n_channels; j++) { 96 channel = &bands->channels[j]; 97 if (channel->flags & IEEE80211_CHAN_DISABLED) 98 continue; 99 request->channels[i++] = channel; 100 } 101 request->rates[band] = (1 << bands->n_bitrates) - 1; 102 } 103 n_channels = i; 104 } 105 request->n_channels = n_channels; 106 request->ssids = (void *)&request->channels[n_channels]; 107 request->n_ssids = 1; 108 109 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 110 wdev->conn->params.ssid_len); 111 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 112 113 request->wdev = wdev; 114 request->wiphy = &rdev->wiphy; 115 request->scan_start = jiffies; 116 117 rdev->scan_req = request; 118 119 err = rdev_scan(rdev, request); 120 if (!err) { 121 wdev->conn->state = CFG80211_CONN_SCANNING; 122 nl80211_send_scan_start(rdev, wdev); 123 dev_hold(wdev->netdev); 124 } else { 125 rdev->scan_req = NULL; 126 kfree(request); 127 } 128 return err; 129 } 130 131 static int cfg80211_conn_do_work(struct wireless_dev *wdev) 132 { 133 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 134 struct cfg80211_connect_params *params; 135 struct cfg80211_assoc_request req = {}; 136 int err; 137 138 ASSERT_WDEV_LOCK(wdev); 139 140 if (!wdev->conn) 141 return 0; 142 143 params = &wdev->conn->params; 144 145 switch (wdev->conn->state) { 146 case CFG80211_CONN_SCANNING: 147 /* didn't find it during scan ... */ 148 return -ENOENT; 149 case CFG80211_CONN_SCAN_AGAIN: 150 return cfg80211_conn_scan(wdev); 151 case CFG80211_CONN_AUTHENTICATE_NEXT: 152 BUG_ON(!rdev->ops->auth); 153 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 154 return cfg80211_mlme_auth(rdev, wdev->netdev, 155 params->channel, params->auth_type, 156 params->bssid, 157 params->ssid, params->ssid_len, 158 NULL, 0, 159 params->key, params->key_len, 160 params->key_idx, NULL, 0); 161 case CFG80211_CONN_AUTH_FAILED: 162 return -ENOTCONN; 163 case CFG80211_CONN_ASSOCIATE_NEXT: 164 BUG_ON(!rdev->ops->assoc); 165 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 166 if (wdev->conn->prev_bssid_valid) 167 req.prev_bssid = wdev->conn->prev_bssid; 168 req.ie = params->ie; 169 req.ie_len = params->ie_len; 170 req.use_mfp = params->mfp != NL80211_MFP_NO; 171 req.crypto = params->crypto; 172 req.flags = params->flags; 173 req.ht_capa = params->ht_capa; 174 req.ht_capa_mask = params->ht_capa_mask; 175 req.vht_capa = params->vht_capa; 176 req.vht_capa_mask = params->vht_capa_mask; 177 178 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 179 params->bssid, params->ssid, 180 params->ssid_len, &req); 181 if (err) 182 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 183 NULL, 0, 184 WLAN_REASON_DEAUTH_LEAVING, 185 false); 186 return err; 187 case CFG80211_CONN_ASSOC_FAILED: 188 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 189 NULL, 0, 190 WLAN_REASON_DEAUTH_LEAVING, false); 191 return -ENOTCONN; 192 case CFG80211_CONN_DEAUTH: 193 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 194 NULL, 0, 195 WLAN_REASON_DEAUTH_LEAVING, false); 196 /* free directly, disconnected event already sent */ 197 cfg80211_sme_free(wdev); 198 return 0; 199 default: 200 return 0; 201 } 202 } 203 204 void cfg80211_conn_work(struct work_struct *work) 205 { 206 struct cfg80211_registered_device *rdev = 207 container_of(work, struct cfg80211_registered_device, conn_work); 208 struct wireless_dev *wdev; 209 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 210 211 rtnl_lock(); 212 213 list_for_each_entry(wdev, &rdev->wdev_list, list) { 214 if (!wdev->netdev) 215 continue; 216 217 wdev_lock(wdev); 218 if (!netif_running(wdev->netdev)) { 219 wdev_unlock(wdev); 220 continue; 221 } 222 if (!wdev->conn || 223 wdev->conn->state == CFG80211_CONN_CONNECTED) { 224 wdev_unlock(wdev); 225 continue; 226 } 227 if (wdev->conn->params.bssid) { 228 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 229 bssid = bssid_buf; 230 } 231 if (cfg80211_conn_do_work(wdev)) { 232 __cfg80211_connect_result( 233 wdev->netdev, bssid, 234 NULL, 0, NULL, 0, 235 WLAN_STATUS_UNSPECIFIED_FAILURE, 236 false, NULL); 237 cfg80211_sme_free(wdev); 238 } 239 wdev_unlock(wdev); 240 } 241 242 rtnl_unlock(); 243 } 244 245 /* Returned bss is reference counted and must be cleaned up appropriately. */ 246 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 247 { 248 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 249 struct cfg80211_bss *bss; 250 u16 capa = WLAN_CAPABILITY_ESS; 251 252 ASSERT_WDEV_LOCK(wdev); 253 254 if (wdev->conn->params.privacy) 255 capa |= WLAN_CAPABILITY_PRIVACY; 256 257 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 258 wdev->conn->params.bssid, 259 wdev->conn->params.ssid, 260 wdev->conn->params.ssid_len, 261 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 262 capa); 263 if (!bss) 264 return NULL; 265 266 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 267 wdev->conn->params.bssid = wdev->conn->bssid; 268 wdev->conn->params.channel = bss->channel; 269 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 270 schedule_work(&rdev->conn_work); 271 272 return bss; 273 } 274 275 static void __cfg80211_sme_scan_done(struct net_device *dev) 276 { 277 struct wireless_dev *wdev = dev->ieee80211_ptr; 278 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 279 struct cfg80211_bss *bss; 280 281 ASSERT_WDEV_LOCK(wdev); 282 283 if (!wdev->conn) 284 return; 285 286 if (wdev->conn->state != CFG80211_CONN_SCANNING && 287 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 288 return; 289 290 bss = cfg80211_get_conn_bss(wdev); 291 if (bss) 292 cfg80211_put_bss(&rdev->wiphy, bss); 293 else 294 schedule_work(&rdev->conn_work); 295 } 296 297 void cfg80211_sme_scan_done(struct net_device *dev) 298 { 299 struct wireless_dev *wdev = dev->ieee80211_ptr; 300 301 wdev_lock(wdev); 302 __cfg80211_sme_scan_done(dev); 303 wdev_unlock(wdev); 304 } 305 306 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 307 { 308 struct wiphy *wiphy = wdev->wiphy; 309 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 310 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 311 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 312 313 ASSERT_WDEV_LOCK(wdev); 314 315 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 316 return; 317 318 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 319 wdev->conn->auto_auth && 320 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 321 /* select automatically between only open, shared, leap */ 322 switch (wdev->conn->params.auth_type) { 323 case NL80211_AUTHTYPE_OPEN_SYSTEM: 324 if (wdev->connect_keys) 325 wdev->conn->params.auth_type = 326 NL80211_AUTHTYPE_SHARED_KEY; 327 else 328 wdev->conn->params.auth_type = 329 NL80211_AUTHTYPE_NETWORK_EAP; 330 break; 331 case NL80211_AUTHTYPE_SHARED_KEY: 332 wdev->conn->params.auth_type = 333 NL80211_AUTHTYPE_NETWORK_EAP; 334 break; 335 default: 336 /* huh? */ 337 wdev->conn->params.auth_type = 338 NL80211_AUTHTYPE_OPEN_SYSTEM; 339 break; 340 } 341 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 342 schedule_work(&rdev->conn_work); 343 } else if (status_code != WLAN_STATUS_SUCCESS) { 344 __cfg80211_connect_result(wdev->netdev, mgmt->bssid, 345 NULL, 0, NULL, 0, 346 status_code, false, NULL); 347 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 348 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 349 schedule_work(&rdev->conn_work); 350 } 351 } 352 353 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 354 { 355 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 356 357 if (!wdev->conn) 358 return false; 359 360 if (status == WLAN_STATUS_SUCCESS) { 361 wdev->conn->state = CFG80211_CONN_CONNECTED; 362 return false; 363 } 364 365 if (wdev->conn->prev_bssid_valid) { 366 /* 367 * Some stupid APs don't accept reassoc, so we 368 * need to fall back to trying regular assoc; 369 * return true so no event is sent to userspace. 370 */ 371 wdev->conn->prev_bssid_valid = false; 372 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 373 schedule_work(&rdev->conn_work); 374 return true; 375 } 376 377 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 378 schedule_work(&rdev->conn_work); 379 return false; 380 } 381 382 void cfg80211_sme_deauth(struct wireless_dev *wdev) 383 { 384 cfg80211_sme_free(wdev); 385 } 386 387 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 388 { 389 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 390 391 if (!wdev->conn) 392 return; 393 394 wdev->conn->state = CFG80211_CONN_AUTH_FAILED; 395 schedule_work(&rdev->conn_work); 396 } 397 398 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 399 { 400 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 401 402 if (!wdev->conn) 403 return; 404 405 wdev->conn->state = CFG80211_CONN_DEAUTH; 406 schedule_work(&rdev->conn_work); 407 } 408 409 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 410 { 411 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 412 413 if (!wdev->conn) 414 return; 415 416 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 417 schedule_work(&rdev->conn_work); 418 } 419 420 static int cfg80211_sme_connect(struct wireless_dev *wdev, 421 struct cfg80211_connect_params *connect, 422 const u8 *prev_bssid) 423 { 424 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 425 struct cfg80211_bss *bss; 426 int err; 427 428 if (!rdev->ops->auth || !rdev->ops->assoc) 429 return -EOPNOTSUPP; 430 431 if (wdev->current_bss) 432 return -EALREADY; 433 434 if (WARN_ON(wdev->conn)) 435 return -EINPROGRESS; 436 437 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 438 if (!wdev->conn) 439 return -ENOMEM; 440 441 /* 442 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 443 */ 444 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 445 if (connect->bssid) { 446 wdev->conn->params.bssid = wdev->conn->bssid; 447 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 448 } 449 450 if (connect->ie) { 451 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 452 GFP_KERNEL); 453 wdev->conn->params.ie = wdev->conn->ie; 454 if (!wdev->conn->ie) { 455 kfree(wdev->conn); 456 wdev->conn = NULL; 457 return -ENOMEM; 458 } 459 } 460 461 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 462 wdev->conn->auto_auth = true; 463 /* start with open system ... should mostly work */ 464 wdev->conn->params.auth_type = 465 NL80211_AUTHTYPE_OPEN_SYSTEM; 466 } else { 467 wdev->conn->auto_auth = false; 468 } 469 470 wdev->conn->params.ssid = wdev->ssid; 471 wdev->conn->params.ssid_len = connect->ssid_len; 472 473 /* see if we have the bss already */ 474 bss = cfg80211_get_conn_bss(wdev); 475 476 if (prev_bssid) { 477 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 478 wdev->conn->prev_bssid_valid = true; 479 } 480 481 /* we're good if we have a matching bss struct */ 482 if (bss) { 483 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 484 err = cfg80211_conn_do_work(wdev); 485 cfg80211_put_bss(wdev->wiphy, bss); 486 } else { 487 /* otherwise we'll need to scan for the AP first */ 488 err = cfg80211_conn_scan(wdev); 489 490 /* 491 * If we can't scan right now, then we need to scan again 492 * after the current scan finished, since the parameters 493 * changed (unless we find a good AP anyway). 494 */ 495 if (err == -EBUSY) { 496 err = 0; 497 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 498 } 499 } 500 501 if (err) 502 cfg80211_sme_free(wdev); 503 504 return err; 505 } 506 507 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 508 { 509 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 510 int err; 511 512 if (!wdev->conn) 513 return 0; 514 515 if (!rdev->ops->deauth) 516 return -EOPNOTSUPP; 517 518 if (wdev->conn->state == CFG80211_CONN_SCANNING || 519 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 520 err = 0; 521 goto out; 522 } 523 524 /* wdev->conn->params.bssid must be set if > SCANNING */ 525 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 526 wdev->conn->params.bssid, 527 NULL, 0, reason, false); 528 out: 529 cfg80211_sme_free(wdev); 530 return err; 531 } 532 533 /* 534 * code shared for in-device and software SME 535 */ 536 537 static bool cfg80211_is_all_idle(void) 538 { 539 struct cfg80211_registered_device *rdev; 540 struct wireless_dev *wdev; 541 bool is_all_idle = true; 542 543 /* 544 * All devices must be idle as otherwise if you are actively 545 * scanning some new beacon hints could be learned and would 546 * count as new regulatory hints. 547 */ 548 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 549 list_for_each_entry(wdev, &rdev->wdev_list, list) { 550 wdev_lock(wdev); 551 if (wdev->conn || wdev->current_bss) 552 is_all_idle = false; 553 wdev_unlock(wdev); 554 } 555 } 556 557 return is_all_idle; 558 } 559 560 static void disconnect_work(struct work_struct *work) 561 { 562 rtnl_lock(); 563 if (cfg80211_is_all_idle()) 564 regulatory_hint_disconnect(); 565 rtnl_unlock(); 566 } 567 568 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 569 570 571 /* 572 * API calls for drivers implementing connect/disconnect and 573 * SME event handling 574 */ 575 576 /* This method must consume bss one way or another */ 577 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 578 const u8 *req_ie, size_t req_ie_len, 579 const u8 *resp_ie, size_t resp_ie_len, 580 u16 status, bool wextev, 581 struct cfg80211_bss *bss) 582 { 583 struct wireless_dev *wdev = dev->ieee80211_ptr; 584 const u8 *country_ie; 585 #ifdef CONFIG_CFG80211_WEXT 586 union iwreq_data wrqu; 587 #endif 588 589 ASSERT_WDEV_LOCK(wdev); 590 591 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 592 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 593 cfg80211_put_bss(wdev->wiphy, bss); 594 return; 595 } 596 597 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 598 bssid, req_ie, req_ie_len, 599 resp_ie, resp_ie_len, 600 status, GFP_KERNEL); 601 602 #ifdef CONFIG_CFG80211_WEXT 603 if (wextev) { 604 if (req_ie && status == WLAN_STATUS_SUCCESS) { 605 memset(&wrqu, 0, sizeof(wrqu)); 606 wrqu.data.length = req_ie_len; 607 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 608 } 609 610 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 611 memset(&wrqu, 0, sizeof(wrqu)); 612 wrqu.data.length = resp_ie_len; 613 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 614 } 615 616 memset(&wrqu, 0, sizeof(wrqu)); 617 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 618 if (bssid && status == WLAN_STATUS_SUCCESS) { 619 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 620 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 621 wdev->wext.prev_bssid_valid = true; 622 } 623 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 624 } 625 #endif 626 627 if (!bss && (status == WLAN_STATUS_SUCCESS)) { 628 WARN_ON_ONCE(!wiphy_to_dev(wdev->wiphy)->ops->connect); 629 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, 630 wdev->ssid, wdev->ssid_len, 631 WLAN_CAPABILITY_ESS, 632 WLAN_CAPABILITY_ESS); 633 if (bss) 634 cfg80211_hold_bss(bss_from_pub(bss)); 635 } 636 637 if (wdev->current_bss) { 638 cfg80211_unhold_bss(wdev->current_bss); 639 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 640 wdev->current_bss = NULL; 641 } 642 643 if (status != WLAN_STATUS_SUCCESS) { 644 kfree(wdev->connect_keys); 645 wdev->connect_keys = NULL; 646 wdev->ssid_len = 0; 647 if (bss) { 648 cfg80211_unhold_bss(bss_from_pub(bss)); 649 cfg80211_put_bss(wdev->wiphy, bss); 650 } 651 return; 652 } 653 654 if (WARN_ON(!bss)) 655 return; 656 657 wdev->current_bss = bss_from_pub(bss); 658 659 cfg80211_upload_connect_keys(wdev); 660 661 rcu_read_lock(); 662 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 663 if (!country_ie) { 664 rcu_read_unlock(); 665 return; 666 } 667 668 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 669 rcu_read_unlock(); 670 671 if (!country_ie) 672 return; 673 674 /* 675 * ieee80211_bss_get_ie() ensures we can access: 676 * - country_ie + 2, the start of the country ie data, and 677 * - and country_ie[1] which is the IE length 678 */ 679 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band, 680 country_ie + 2, country_ie[1]); 681 kfree(country_ie); 682 } 683 684 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 685 const u8 *req_ie, size_t req_ie_len, 686 const u8 *resp_ie, size_t resp_ie_len, 687 u16 status, gfp_t gfp) 688 { 689 struct wireless_dev *wdev = dev->ieee80211_ptr; 690 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 691 struct cfg80211_event *ev; 692 unsigned long flags; 693 694 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 695 if (!ev) 696 return; 697 698 ev->type = EVENT_CONNECT_RESULT; 699 if (bssid) 700 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 701 if (req_ie_len) { 702 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 703 ev->cr.req_ie_len = req_ie_len; 704 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 705 } 706 if (resp_ie_len) { 707 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 708 ev->cr.resp_ie_len = resp_ie_len; 709 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 710 } 711 ev->cr.status = status; 712 713 spin_lock_irqsave(&wdev->event_lock, flags); 714 list_add_tail(&ev->list, &wdev->event_list); 715 spin_unlock_irqrestore(&wdev->event_lock, flags); 716 queue_work(cfg80211_wq, &rdev->event_work); 717 } 718 EXPORT_SYMBOL(cfg80211_connect_result); 719 720 /* Consumes bss object one way or another */ 721 void __cfg80211_roamed(struct wireless_dev *wdev, 722 struct cfg80211_bss *bss, 723 const u8 *req_ie, size_t req_ie_len, 724 const u8 *resp_ie, size_t resp_ie_len) 725 { 726 #ifdef CONFIG_CFG80211_WEXT 727 union iwreq_data wrqu; 728 #endif 729 ASSERT_WDEV_LOCK(wdev); 730 731 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 732 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 733 goto out; 734 735 if (WARN_ON(!wdev->current_bss)) 736 goto out; 737 738 cfg80211_unhold_bss(wdev->current_bss); 739 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 740 wdev->current_bss = NULL; 741 742 cfg80211_hold_bss(bss_from_pub(bss)); 743 wdev->current_bss = bss_from_pub(bss); 744 745 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 746 req_ie, req_ie_len, resp_ie, resp_ie_len, 747 GFP_KERNEL); 748 749 #ifdef CONFIG_CFG80211_WEXT 750 if (req_ie) { 751 memset(&wrqu, 0, sizeof(wrqu)); 752 wrqu.data.length = req_ie_len; 753 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 754 &wrqu, req_ie); 755 } 756 757 if (resp_ie) { 758 memset(&wrqu, 0, sizeof(wrqu)); 759 wrqu.data.length = resp_ie_len; 760 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 761 &wrqu, resp_ie); 762 } 763 764 memset(&wrqu, 0, sizeof(wrqu)); 765 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 766 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 767 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 768 wdev->wext.prev_bssid_valid = true; 769 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 770 #endif 771 772 return; 773 out: 774 cfg80211_put_bss(wdev->wiphy, bss); 775 } 776 777 void cfg80211_roamed(struct net_device *dev, 778 struct ieee80211_channel *channel, 779 const u8 *bssid, 780 const u8 *req_ie, size_t req_ie_len, 781 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 782 { 783 struct wireless_dev *wdev = dev->ieee80211_ptr; 784 struct cfg80211_bss *bss; 785 786 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 787 wdev->ssid_len, WLAN_CAPABILITY_ESS, 788 WLAN_CAPABILITY_ESS); 789 if (WARN_ON(!bss)) 790 return; 791 792 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 793 resp_ie_len, gfp); 794 } 795 EXPORT_SYMBOL(cfg80211_roamed); 796 797 /* Consumes bss object one way or another */ 798 void cfg80211_roamed_bss(struct net_device *dev, 799 struct cfg80211_bss *bss, const u8 *req_ie, 800 size_t req_ie_len, const u8 *resp_ie, 801 size_t resp_ie_len, gfp_t gfp) 802 { 803 struct wireless_dev *wdev = dev->ieee80211_ptr; 804 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 805 struct cfg80211_event *ev; 806 unsigned long flags; 807 808 if (WARN_ON(!bss)) 809 return; 810 811 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 812 if (!ev) { 813 cfg80211_put_bss(wdev->wiphy, bss); 814 return; 815 } 816 817 ev->type = EVENT_ROAMED; 818 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 819 ev->rm.req_ie_len = req_ie_len; 820 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 821 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 822 ev->rm.resp_ie_len = resp_ie_len; 823 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 824 ev->rm.bss = bss; 825 826 spin_lock_irqsave(&wdev->event_lock, flags); 827 list_add_tail(&ev->list, &wdev->event_list); 828 spin_unlock_irqrestore(&wdev->event_lock, flags); 829 queue_work(cfg80211_wq, &rdev->event_work); 830 } 831 EXPORT_SYMBOL(cfg80211_roamed_bss); 832 833 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 834 size_t ie_len, u16 reason, bool from_ap) 835 { 836 struct wireless_dev *wdev = dev->ieee80211_ptr; 837 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 838 int i; 839 #ifdef CONFIG_CFG80211_WEXT 840 union iwreq_data wrqu; 841 #endif 842 843 ASSERT_WDEV_LOCK(wdev); 844 845 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 846 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 847 return; 848 849 if (wdev->current_bss) { 850 cfg80211_unhold_bss(wdev->current_bss); 851 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 852 } 853 854 wdev->current_bss = NULL; 855 wdev->ssid_len = 0; 856 857 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 858 859 /* 860 * Delete all the keys ... pairwise keys can't really 861 * exist any more anyway, but default keys might. 862 */ 863 if (rdev->ops->del_key) 864 for (i = 0; i < 6; i++) 865 rdev_del_key(rdev, dev, i, false, NULL); 866 867 rdev_set_qos_map(rdev, dev, NULL); 868 869 #ifdef CONFIG_CFG80211_WEXT 870 memset(&wrqu, 0, sizeof(wrqu)); 871 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 872 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 873 wdev->wext.connect.ssid_len = 0; 874 #endif 875 876 schedule_work(&cfg80211_disconnect_work); 877 } 878 879 void cfg80211_disconnected(struct net_device *dev, u16 reason, 880 u8 *ie, size_t ie_len, gfp_t gfp) 881 { 882 struct wireless_dev *wdev = dev->ieee80211_ptr; 883 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 884 struct cfg80211_event *ev; 885 unsigned long flags; 886 887 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 888 if (!ev) 889 return; 890 891 ev->type = EVENT_DISCONNECTED; 892 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 893 ev->dc.ie_len = ie_len; 894 memcpy((void *)ev->dc.ie, ie, ie_len); 895 ev->dc.reason = reason; 896 897 spin_lock_irqsave(&wdev->event_lock, flags); 898 list_add_tail(&ev->list, &wdev->event_list); 899 spin_unlock_irqrestore(&wdev->event_lock, flags); 900 queue_work(cfg80211_wq, &rdev->event_work); 901 } 902 EXPORT_SYMBOL(cfg80211_disconnected); 903 904 /* 905 * API calls for nl80211/wext compatibility code 906 */ 907 int cfg80211_connect(struct cfg80211_registered_device *rdev, 908 struct net_device *dev, 909 struct cfg80211_connect_params *connect, 910 struct cfg80211_cached_keys *connkeys, 911 const u8 *prev_bssid) 912 { 913 struct wireless_dev *wdev = dev->ieee80211_ptr; 914 int err; 915 916 ASSERT_WDEV_LOCK(wdev); 917 918 if (WARN_ON(wdev->connect_keys)) { 919 kfree(wdev->connect_keys); 920 wdev->connect_keys = NULL; 921 } 922 923 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 924 rdev->wiphy.ht_capa_mod_mask); 925 926 if (connkeys && connkeys->def >= 0) { 927 int idx; 928 u32 cipher; 929 930 idx = connkeys->def; 931 cipher = connkeys->params[idx].cipher; 932 /* If given a WEP key we may need it for shared key auth */ 933 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 934 cipher == WLAN_CIPHER_SUITE_WEP104) { 935 connect->key_idx = idx; 936 connect->key = connkeys->params[idx].key; 937 connect->key_len = connkeys->params[idx].key_len; 938 939 /* 940 * If ciphers are not set (e.g. when going through 941 * iwconfig), we have to set them appropriately here. 942 */ 943 if (connect->crypto.cipher_group == 0) 944 connect->crypto.cipher_group = cipher; 945 946 if (connect->crypto.n_ciphers_pairwise == 0) { 947 connect->crypto.n_ciphers_pairwise = 1; 948 connect->crypto.ciphers_pairwise[0] = cipher; 949 } 950 } 951 } 952 953 wdev->connect_keys = connkeys; 954 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 955 wdev->ssid_len = connect->ssid_len; 956 957 if (!rdev->ops->connect) 958 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 959 else 960 err = rdev_connect(rdev, dev, connect); 961 962 if (err) { 963 wdev->connect_keys = NULL; 964 wdev->ssid_len = 0; 965 return err; 966 } 967 968 return 0; 969 } 970 971 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 972 struct net_device *dev, u16 reason, bool wextev) 973 { 974 struct wireless_dev *wdev = dev->ieee80211_ptr; 975 int err = 0; 976 977 ASSERT_WDEV_LOCK(wdev); 978 979 kfree(wdev->connect_keys); 980 wdev->connect_keys = NULL; 981 982 if (wdev->conn) 983 err = cfg80211_sme_disconnect(wdev, reason); 984 else if (!rdev->ops->disconnect) 985 cfg80211_mlme_down(rdev, dev); 986 else if (wdev->current_bss) 987 err = rdev_disconnect(rdev, dev, reason); 988 989 return err; 990 } 991