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_rdev(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 enum ieee80211_band band = wdev->conn->params.channel->band; 85 struct ieee80211_supported_band *sband = 86 wdev->wiphy->bands[band]; 87 88 if (!sband) { 89 kfree(request); 90 return -EINVAL; 91 } 92 request->channels[0] = wdev->conn->params.channel; 93 request->rates[band] = (1 << sband->n_bitrates) - 1; 94 } else { 95 int i = 0, j; 96 enum ieee80211_band band; 97 struct ieee80211_supported_band *bands; 98 struct ieee80211_channel *channel; 99 100 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 101 bands = wdev->wiphy->bands[band]; 102 if (!bands) 103 continue; 104 for (j = 0; j < bands->n_channels; j++) { 105 channel = &bands->channels[j]; 106 if (channel->flags & IEEE80211_CHAN_DISABLED) 107 continue; 108 request->channels[i++] = channel; 109 } 110 request->rates[band] = (1 << bands->n_bitrates) - 1; 111 } 112 n_channels = i; 113 } 114 request->n_channels = n_channels; 115 request->ssids = (void *)&request->channels[n_channels]; 116 request->n_ssids = 1; 117 118 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 119 wdev->conn->params.ssid_len); 120 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 121 122 request->wdev = wdev; 123 request->wiphy = &rdev->wiphy; 124 request->scan_start = jiffies; 125 126 rdev->scan_req = request; 127 128 err = rdev_scan(rdev, request); 129 if (!err) { 130 wdev->conn->state = CFG80211_CONN_SCANNING; 131 nl80211_send_scan_start(rdev, wdev); 132 dev_hold(wdev->netdev); 133 } else { 134 rdev->scan_req = NULL; 135 kfree(request); 136 } 137 return err; 138 } 139 140 static int cfg80211_conn_do_work(struct wireless_dev *wdev) 141 { 142 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 143 struct cfg80211_connect_params *params; 144 struct cfg80211_assoc_request req = {}; 145 int err; 146 147 ASSERT_WDEV_LOCK(wdev); 148 149 if (!wdev->conn) 150 return 0; 151 152 params = &wdev->conn->params; 153 154 switch (wdev->conn->state) { 155 case CFG80211_CONN_SCANNING: 156 /* didn't find it during scan ... */ 157 return -ENOENT; 158 case CFG80211_CONN_SCAN_AGAIN: 159 return cfg80211_conn_scan(wdev); 160 case CFG80211_CONN_AUTHENTICATE_NEXT: 161 if (WARN_ON(!rdev->ops->auth)) 162 return -EOPNOTSUPP; 163 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 164 return cfg80211_mlme_auth(rdev, wdev->netdev, 165 params->channel, params->auth_type, 166 params->bssid, 167 params->ssid, params->ssid_len, 168 NULL, 0, 169 params->key, params->key_len, 170 params->key_idx, NULL, 0); 171 case CFG80211_CONN_AUTH_FAILED: 172 return -ENOTCONN; 173 case CFG80211_CONN_ASSOCIATE_NEXT: 174 if (WARN_ON(!rdev->ops->assoc)) 175 return -EOPNOTSUPP; 176 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 177 if (wdev->conn->prev_bssid_valid) 178 req.prev_bssid = wdev->conn->prev_bssid; 179 req.ie = params->ie; 180 req.ie_len = params->ie_len; 181 req.use_mfp = params->mfp != NL80211_MFP_NO; 182 req.crypto = params->crypto; 183 req.flags = params->flags; 184 req.ht_capa = params->ht_capa; 185 req.ht_capa_mask = params->ht_capa_mask; 186 req.vht_capa = params->vht_capa; 187 req.vht_capa_mask = params->vht_capa_mask; 188 189 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 190 params->bssid, params->ssid, 191 params->ssid_len, &req); 192 if (err) 193 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 194 NULL, 0, 195 WLAN_REASON_DEAUTH_LEAVING, 196 false); 197 return err; 198 case CFG80211_CONN_ASSOC_FAILED: 199 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 200 NULL, 0, 201 WLAN_REASON_DEAUTH_LEAVING, false); 202 return -ENOTCONN; 203 case CFG80211_CONN_DEAUTH: 204 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 205 NULL, 0, 206 WLAN_REASON_DEAUTH_LEAVING, false); 207 /* free directly, disconnected event already sent */ 208 cfg80211_sme_free(wdev); 209 return 0; 210 default: 211 return 0; 212 } 213 } 214 215 void cfg80211_conn_work(struct work_struct *work) 216 { 217 struct cfg80211_registered_device *rdev = 218 container_of(work, struct cfg80211_registered_device, conn_work); 219 struct wireless_dev *wdev; 220 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 221 222 rtnl_lock(); 223 224 list_for_each_entry(wdev, &rdev->wdev_list, list) { 225 if (!wdev->netdev) 226 continue; 227 228 wdev_lock(wdev); 229 if (!netif_running(wdev->netdev)) { 230 wdev_unlock(wdev); 231 continue; 232 } 233 if (!wdev->conn || 234 wdev->conn->state == CFG80211_CONN_CONNECTED) { 235 wdev_unlock(wdev); 236 continue; 237 } 238 if (wdev->conn->params.bssid) { 239 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 240 bssid = bssid_buf; 241 } 242 if (cfg80211_conn_do_work(wdev)) { 243 __cfg80211_connect_result( 244 wdev->netdev, bssid, 245 NULL, 0, NULL, 0, 246 WLAN_STATUS_UNSPECIFIED_FAILURE, 247 false, NULL); 248 } 249 wdev_unlock(wdev); 250 } 251 252 rtnl_unlock(); 253 } 254 255 /* Returned bss is reference counted and must be cleaned up appropriately. */ 256 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 257 { 258 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 259 struct cfg80211_bss *bss; 260 u16 capa = WLAN_CAPABILITY_ESS; 261 262 ASSERT_WDEV_LOCK(wdev); 263 264 if (wdev->conn->params.privacy) 265 capa |= WLAN_CAPABILITY_PRIVACY; 266 267 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 268 wdev->conn->params.bssid, 269 wdev->conn->params.ssid, 270 wdev->conn->params.ssid_len, 271 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 272 capa); 273 if (!bss) 274 return NULL; 275 276 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 277 wdev->conn->params.bssid = wdev->conn->bssid; 278 wdev->conn->params.channel = bss->channel; 279 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 280 schedule_work(&rdev->conn_work); 281 282 return bss; 283 } 284 285 static void __cfg80211_sme_scan_done(struct net_device *dev) 286 { 287 struct wireless_dev *wdev = dev->ieee80211_ptr; 288 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 289 struct cfg80211_bss *bss; 290 291 ASSERT_WDEV_LOCK(wdev); 292 293 if (!wdev->conn) 294 return; 295 296 if (wdev->conn->state != CFG80211_CONN_SCANNING && 297 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 298 return; 299 300 bss = cfg80211_get_conn_bss(wdev); 301 if (bss) 302 cfg80211_put_bss(&rdev->wiphy, bss); 303 else 304 schedule_work(&rdev->conn_work); 305 } 306 307 void cfg80211_sme_scan_done(struct net_device *dev) 308 { 309 struct wireless_dev *wdev = dev->ieee80211_ptr; 310 311 wdev_lock(wdev); 312 __cfg80211_sme_scan_done(dev); 313 wdev_unlock(wdev); 314 } 315 316 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 317 { 318 struct wiphy *wiphy = wdev->wiphy; 319 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 320 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 321 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 322 323 ASSERT_WDEV_LOCK(wdev); 324 325 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 326 return; 327 328 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 329 wdev->conn->auto_auth && 330 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 331 /* select automatically between only open, shared, leap */ 332 switch (wdev->conn->params.auth_type) { 333 case NL80211_AUTHTYPE_OPEN_SYSTEM: 334 if (wdev->connect_keys) 335 wdev->conn->params.auth_type = 336 NL80211_AUTHTYPE_SHARED_KEY; 337 else 338 wdev->conn->params.auth_type = 339 NL80211_AUTHTYPE_NETWORK_EAP; 340 break; 341 case NL80211_AUTHTYPE_SHARED_KEY: 342 wdev->conn->params.auth_type = 343 NL80211_AUTHTYPE_NETWORK_EAP; 344 break; 345 default: 346 /* huh? */ 347 wdev->conn->params.auth_type = 348 NL80211_AUTHTYPE_OPEN_SYSTEM; 349 break; 350 } 351 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 352 schedule_work(&rdev->conn_work); 353 } else if (status_code != WLAN_STATUS_SUCCESS) { 354 __cfg80211_connect_result(wdev->netdev, mgmt->bssid, 355 NULL, 0, NULL, 0, 356 status_code, false, NULL); 357 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 358 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 359 schedule_work(&rdev->conn_work); 360 } 361 } 362 363 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 364 { 365 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 366 367 if (!wdev->conn) 368 return false; 369 370 if (status == WLAN_STATUS_SUCCESS) { 371 wdev->conn->state = CFG80211_CONN_CONNECTED; 372 return false; 373 } 374 375 if (wdev->conn->prev_bssid_valid) { 376 /* 377 * Some stupid APs don't accept reassoc, so we 378 * need to fall back to trying regular assoc; 379 * return true so no event is sent to userspace. 380 */ 381 wdev->conn->prev_bssid_valid = false; 382 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 383 schedule_work(&rdev->conn_work); 384 return true; 385 } 386 387 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 388 schedule_work(&rdev->conn_work); 389 return false; 390 } 391 392 void cfg80211_sme_deauth(struct wireless_dev *wdev) 393 { 394 cfg80211_sme_free(wdev); 395 } 396 397 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 398 { 399 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 400 401 if (!wdev->conn) 402 return; 403 404 wdev->conn->state = CFG80211_CONN_AUTH_FAILED; 405 schedule_work(&rdev->conn_work); 406 } 407 408 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 409 { 410 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 411 412 if (!wdev->conn) 413 return; 414 415 wdev->conn->state = CFG80211_CONN_DEAUTH; 416 schedule_work(&rdev->conn_work); 417 } 418 419 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 420 { 421 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 422 423 if (!wdev->conn) 424 return; 425 426 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 427 schedule_work(&rdev->conn_work); 428 } 429 430 static int cfg80211_sme_connect(struct wireless_dev *wdev, 431 struct cfg80211_connect_params *connect, 432 const u8 *prev_bssid) 433 { 434 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 435 struct cfg80211_bss *bss; 436 int err; 437 438 if (!rdev->ops->auth || !rdev->ops->assoc) 439 return -EOPNOTSUPP; 440 441 if (wdev->current_bss) 442 return -EALREADY; 443 444 if (WARN_ON(wdev->conn)) 445 return -EINPROGRESS; 446 447 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 448 if (!wdev->conn) 449 return -ENOMEM; 450 451 /* 452 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 453 */ 454 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 455 if (connect->bssid) { 456 wdev->conn->params.bssid = wdev->conn->bssid; 457 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 458 } 459 460 if (connect->ie) { 461 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 462 GFP_KERNEL); 463 wdev->conn->params.ie = wdev->conn->ie; 464 if (!wdev->conn->ie) { 465 kfree(wdev->conn); 466 wdev->conn = NULL; 467 return -ENOMEM; 468 } 469 } 470 471 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 472 wdev->conn->auto_auth = true; 473 /* start with open system ... should mostly work */ 474 wdev->conn->params.auth_type = 475 NL80211_AUTHTYPE_OPEN_SYSTEM; 476 } else { 477 wdev->conn->auto_auth = false; 478 } 479 480 wdev->conn->params.ssid = wdev->ssid; 481 wdev->conn->params.ssid_len = wdev->ssid_len; 482 483 /* see if we have the bss already */ 484 bss = cfg80211_get_conn_bss(wdev); 485 486 if (prev_bssid) { 487 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 488 wdev->conn->prev_bssid_valid = true; 489 } 490 491 /* we're good if we have a matching bss struct */ 492 if (bss) { 493 err = cfg80211_conn_do_work(wdev); 494 cfg80211_put_bss(wdev->wiphy, bss); 495 } else { 496 /* otherwise we'll need to scan for the AP first */ 497 err = cfg80211_conn_scan(wdev); 498 499 /* 500 * If we can't scan right now, then we need to scan again 501 * after the current scan finished, since the parameters 502 * changed (unless we find a good AP anyway). 503 */ 504 if (err == -EBUSY) { 505 err = 0; 506 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 507 } 508 } 509 510 if (err) 511 cfg80211_sme_free(wdev); 512 513 return err; 514 } 515 516 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 517 { 518 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 519 int err; 520 521 if (!wdev->conn) 522 return 0; 523 524 if (!rdev->ops->deauth) 525 return -EOPNOTSUPP; 526 527 if (wdev->conn->state == CFG80211_CONN_SCANNING || 528 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 529 err = 0; 530 goto out; 531 } 532 533 /* wdev->conn->params.bssid must be set if > SCANNING */ 534 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 535 wdev->conn->params.bssid, 536 NULL, 0, reason, false); 537 out: 538 cfg80211_sme_free(wdev); 539 return err; 540 } 541 542 /* 543 * code shared for in-device and software SME 544 */ 545 546 static bool cfg80211_is_all_idle(void) 547 { 548 struct cfg80211_registered_device *rdev; 549 struct wireless_dev *wdev; 550 bool is_all_idle = true; 551 552 /* 553 * All devices must be idle as otherwise if you are actively 554 * scanning some new beacon hints could be learned and would 555 * count as new regulatory hints. 556 */ 557 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 558 list_for_each_entry(wdev, &rdev->wdev_list, list) { 559 wdev_lock(wdev); 560 if (wdev->conn || wdev->current_bss) 561 is_all_idle = false; 562 wdev_unlock(wdev); 563 } 564 } 565 566 return is_all_idle; 567 } 568 569 static void disconnect_work(struct work_struct *work) 570 { 571 rtnl_lock(); 572 if (cfg80211_is_all_idle()) 573 regulatory_hint_disconnect(); 574 rtnl_unlock(); 575 } 576 577 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 578 579 580 /* 581 * API calls for drivers implementing connect/disconnect and 582 * SME event handling 583 */ 584 585 /* This method must consume bss one way or another */ 586 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 587 const u8 *req_ie, size_t req_ie_len, 588 const u8 *resp_ie, size_t resp_ie_len, 589 u16 status, bool wextev, 590 struct cfg80211_bss *bss) 591 { 592 struct wireless_dev *wdev = dev->ieee80211_ptr; 593 const u8 *country_ie; 594 #ifdef CONFIG_CFG80211_WEXT 595 union iwreq_data wrqu; 596 #endif 597 598 ASSERT_WDEV_LOCK(wdev); 599 600 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 601 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 602 cfg80211_put_bss(wdev->wiphy, bss); 603 return; 604 } 605 606 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, 607 bssid, req_ie, req_ie_len, 608 resp_ie, resp_ie_len, 609 status, GFP_KERNEL); 610 611 #ifdef CONFIG_CFG80211_WEXT 612 if (wextev) { 613 if (req_ie && status == WLAN_STATUS_SUCCESS) { 614 memset(&wrqu, 0, sizeof(wrqu)); 615 wrqu.data.length = req_ie_len; 616 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 617 } 618 619 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 620 memset(&wrqu, 0, sizeof(wrqu)); 621 wrqu.data.length = resp_ie_len; 622 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 623 } 624 625 memset(&wrqu, 0, sizeof(wrqu)); 626 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 627 if (bssid && status == WLAN_STATUS_SUCCESS) { 628 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 629 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 630 wdev->wext.prev_bssid_valid = true; 631 } 632 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 633 } 634 #endif 635 636 if (!bss && (status == WLAN_STATUS_SUCCESS)) { 637 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 638 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, 639 wdev->ssid, wdev->ssid_len, 640 WLAN_CAPABILITY_ESS, 641 WLAN_CAPABILITY_ESS); 642 if (bss) 643 cfg80211_hold_bss(bss_from_pub(bss)); 644 } 645 646 if (wdev->current_bss) { 647 cfg80211_unhold_bss(wdev->current_bss); 648 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 649 wdev->current_bss = NULL; 650 } 651 652 if (status != WLAN_STATUS_SUCCESS) { 653 kzfree(wdev->connect_keys); 654 wdev->connect_keys = NULL; 655 wdev->ssid_len = 0; 656 if (bss) { 657 cfg80211_unhold_bss(bss_from_pub(bss)); 658 cfg80211_put_bss(wdev->wiphy, bss); 659 } 660 cfg80211_sme_free(wdev); 661 return; 662 } 663 664 if (WARN_ON(!bss)) 665 return; 666 667 wdev->current_bss = bss_from_pub(bss); 668 669 cfg80211_upload_connect_keys(wdev); 670 671 rcu_read_lock(); 672 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 673 if (!country_ie) { 674 rcu_read_unlock(); 675 return; 676 } 677 678 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 679 rcu_read_unlock(); 680 681 if (!country_ie) 682 return; 683 684 /* 685 * ieee80211_bss_get_ie() ensures we can access: 686 * - country_ie + 2, the start of the country ie data, and 687 * - and country_ie[1] which is the IE length 688 */ 689 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band, 690 country_ie + 2, country_ie[1]); 691 kfree(country_ie); 692 } 693 694 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 695 const u8 *req_ie, size_t req_ie_len, 696 const u8 *resp_ie, size_t resp_ie_len, 697 u16 status, gfp_t gfp) 698 { 699 struct wireless_dev *wdev = dev->ieee80211_ptr; 700 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 701 struct cfg80211_event *ev; 702 unsigned long flags; 703 704 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 705 if (!ev) 706 return; 707 708 ev->type = EVENT_CONNECT_RESULT; 709 if (bssid) 710 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 711 if (req_ie_len) { 712 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 713 ev->cr.req_ie_len = req_ie_len; 714 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 715 } 716 if (resp_ie_len) { 717 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 718 ev->cr.resp_ie_len = resp_ie_len; 719 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 720 } 721 ev->cr.status = status; 722 723 spin_lock_irqsave(&wdev->event_lock, flags); 724 list_add_tail(&ev->list, &wdev->event_list); 725 spin_unlock_irqrestore(&wdev->event_lock, flags); 726 queue_work(cfg80211_wq, &rdev->event_work); 727 } 728 EXPORT_SYMBOL(cfg80211_connect_result); 729 730 /* Consumes bss object one way or another */ 731 void __cfg80211_roamed(struct wireless_dev *wdev, 732 struct cfg80211_bss *bss, 733 const u8 *req_ie, size_t req_ie_len, 734 const u8 *resp_ie, size_t resp_ie_len) 735 { 736 #ifdef CONFIG_CFG80211_WEXT 737 union iwreq_data wrqu; 738 #endif 739 ASSERT_WDEV_LOCK(wdev); 740 741 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 742 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 743 goto out; 744 745 if (WARN_ON(!wdev->current_bss)) 746 goto out; 747 748 cfg80211_unhold_bss(wdev->current_bss); 749 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 750 wdev->current_bss = NULL; 751 752 cfg80211_hold_bss(bss_from_pub(bss)); 753 wdev->current_bss = bss_from_pub(bss); 754 755 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 756 wdev->netdev, bss->bssid, 757 req_ie, req_ie_len, resp_ie, resp_ie_len, 758 GFP_KERNEL); 759 760 #ifdef CONFIG_CFG80211_WEXT 761 if (req_ie) { 762 memset(&wrqu, 0, sizeof(wrqu)); 763 wrqu.data.length = req_ie_len; 764 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 765 &wrqu, req_ie); 766 } 767 768 if (resp_ie) { 769 memset(&wrqu, 0, sizeof(wrqu)); 770 wrqu.data.length = resp_ie_len; 771 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 772 &wrqu, resp_ie); 773 } 774 775 memset(&wrqu, 0, sizeof(wrqu)); 776 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 777 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 778 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 779 wdev->wext.prev_bssid_valid = true; 780 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 781 #endif 782 783 return; 784 out: 785 cfg80211_put_bss(wdev->wiphy, bss); 786 } 787 788 void cfg80211_roamed(struct net_device *dev, 789 struct ieee80211_channel *channel, 790 const u8 *bssid, 791 const u8 *req_ie, size_t req_ie_len, 792 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 793 { 794 struct wireless_dev *wdev = dev->ieee80211_ptr; 795 struct cfg80211_bss *bss; 796 797 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 798 wdev->ssid_len, WLAN_CAPABILITY_ESS, 799 WLAN_CAPABILITY_ESS); 800 if (WARN_ON(!bss)) 801 return; 802 803 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 804 resp_ie_len, gfp); 805 } 806 EXPORT_SYMBOL(cfg80211_roamed); 807 808 /* Consumes bss object one way or another */ 809 void cfg80211_roamed_bss(struct net_device *dev, 810 struct cfg80211_bss *bss, const u8 *req_ie, 811 size_t req_ie_len, const u8 *resp_ie, 812 size_t resp_ie_len, gfp_t gfp) 813 { 814 struct wireless_dev *wdev = dev->ieee80211_ptr; 815 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 816 struct cfg80211_event *ev; 817 unsigned long flags; 818 819 if (WARN_ON(!bss)) 820 return; 821 822 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 823 if (!ev) { 824 cfg80211_put_bss(wdev->wiphy, bss); 825 return; 826 } 827 828 ev->type = EVENT_ROAMED; 829 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 830 ev->rm.req_ie_len = req_ie_len; 831 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 832 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 833 ev->rm.resp_ie_len = resp_ie_len; 834 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 835 ev->rm.bss = bss; 836 837 spin_lock_irqsave(&wdev->event_lock, flags); 838 list_add_tail(&ev->list, &wdev->event_list); 839 spin_unlock_irqrestore(&wdev->event_lock, flags); 840 queue_work(cfg80211_wq, &rdev->event_work); 841 } 842 EXPORT_SYMBOL(cfg80211_roamed_bss); 843 844 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 845 size_t ie_len, u16 reason, bool from_ap) 846 { 847 struct wireless_dev *wdev = dev->ieee80211_ptr; 848 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 849 int i; 850 #ifdef CONFIG_CFG80211_WEXT 851 union iwreq_data wrqu; 852 #endif 853 854 ASSERT_WDEV_LOCK(wdev); 855 856 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 857 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 858 return; 859 860 if (wdev->current_bss) { 861 cfg80211_unhold_bss(wdev->current_bss); 862 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 863 } 864 865 wdev->current_bss = NULL; 866 wdev->ssid_len = 0; 867 868 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 869 870 /* 871 * Delete all the keys ... pairwise keys can't really 872 * exist any more anyway, but default keys might. 873 */ 874 if (rdev->ops->del_key) 875 for (i = 0; i < 6; i++) 876 rdev_del_key(rdev, dev, i, false, NULL); 877 878 rdev_set_qos_map(rdev, dev, NULL); 879 880 #ifdef CONFIG_CFG80211_WEXT 881 memset(&wrqu, 0, sizeof(wrqu)); 882 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 883 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 884 wdev->wext.connect.ssid_len = 0; 885 #endif 886 887 schedule_work(&cfg80211_disconnect_work); 888 } 889 890 void cfg80211_disconnected(struct net_device *dev, u16 reason, 891 const u8 *ie, size_t ie_len, gfp_t gfp) 892 { 893 struct wireless_dev *wdev = dev->ieee80211_ptr; 894 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 895 struct cfg80211_event *ev; 896 unsigned long flags; 897 898 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 899 if (!ev) 900 return; 901 902 ev->type = EVENT_DISCONNECTED; 903 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 904 ev->dc.ie_len = ie_len; 905 memcpy((void *)ev->dc.ie, ie, ie_len); 906 ev->dc.reason = reason; 907 908 spin_lock_irqsave(&wdev->event_lock, flags); 909 list_add_tail(&ev->list, &wdev->event_list); 910 spin_unlock_irqrestore(&wdev->event_lock, flags); 911 queue_work(cfg80211_wq, &rdev->event_work); 912 } 913 EXPORT_SYMBOL(cfg80211_disconnected); 914 915 /* 916 * API calls for nl80211/wext compatibility code 917 */ 918 int cfg80211_connect(struct cfg80211_registered_device *rdev, 919 struct net_device *dev, 920 struct cfg80211_connect_params *connect, 921 struct cfg80211_cached_keys *connkeys, 922 const u8 *prev_bssid) 923 { 924 struct wireless_dev *wdev = dev->ieee80211_ptr; 925 int err; 926 927 ASSERT_WDEV_LOCK(wdev); 928 929 if (WARN_ON(wdev->connect_keys)) { 930 kzfree(wdev->connect_keys); 931 wdev->connect_keys = NULL; 932 } 933 934 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 935 rdev->wiphy.ht_capa_mod_mask); 936 937 if (connkeys && connkeys->def >= 0) { 938 int idx; 939 u32 cipher; 940 941 idx = connkeys->def; 942 cipher = connkeys->params[idx].cipher; 943 /* If given a WEP key we may need it for shared key auth */ 944 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 945 cipher == WLAN_CIPHER_SUITE_WEP104) { 946 connect->key_idx = idx; 947 connect->key = connkeys->params[idx].key; 948 connect->key_len = connkeys->params[idx].key_len; 949 950 /* 951 * If ciphers are not set (e.g. when going through 952 * iwconfig), we have to set them appropriately here. 953 */ 954 if (connect->crypto.cipher_group == 0) 955 connect->crypto.cipher_group = cipher; 956 957 if (connect->crypto.n_ciphers_pairwise == 0) { 958 connect->crypto.n_ciphers_pairwise = 1; 959 connect->crypto.ciphers_pairwise[0] = cipher; 960 } 961 } 962 } 963 964 wdev->connect_keys = connkeys; 965 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 966 wdev->ssid_len = connect->ssid_len; 967 968 if (!rdev->ops->connect) 969 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 970 else 971 err = rdev_connect(rdev, dev, connect); 972 973 if (err) { 974 wdev->connect_keys = NULL; 975 wdev->ssid_len = 0; 976 return err; 977 } 978 979 return 0; 980 } 981 982 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 983 struct net_device *dev, u16 reason, bool wextev) 984 { 985 struct wireless_dev *wdev = dev->ieee80211_ptr; 986 int err = 0; 987 988 ASSERT_WDEV_LOCK(wdev); 989 990 kzfree(wdev->connect_keys); 991 wdev->connect_keys = NULL; 992 993 if (wdev->conn) 994 err = cfg80211_sme_disconnect(wdev, reason); 995 else if (!rdev->ops->disconnect) 996 cfg80211_mlme_down(rdev, dev); 997 else if (wdev->current_bss) 998 err = rdev_disconnect(rdev, dev, reason); 999 1000 return err; 1001 } 1002