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 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_rdev(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 if (WARN_ON(!rdev->ops->auth)) 153 return -EOPNOTSUPP; 154 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 155 return cfg80211_mlme_auth(rdev, wdev->netdev, 156 params->channel, params->auth_type, 157 params->bssid, 158 params->ssid, params->ssid_len, 159 NULL, 0, 160 params->key, params->key_len, 161 params->key_idx, NULL, 0); 162 case CFG80211_CONN_AUTH_FAILED: 163 return -ENOTCONN; 164 case CFG80211_CONN_ASSOCIATE_NEXT: 165 if (WARN_ON(!rdev->ops->assoc)) 166 return -EOPNOTSUPP; 167 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 168 if (wdev->conn->prev_bssid_valid) 169 req.prev_bssid = wdev->conn->prev_bssid; 170 req.ie = params->ie; 171 req.ie_len = params->ie_len; 172 req.use_mfp = params->mfp != NL80211_MFP_NO; 173 req.crypto = params->crypto; 174 req.flags = params->flags; 175 req.ht_capa = params->ht_capa; 176 req.ht_capa_mask = params->ht_capa_mask; 177 req.vht_capa = params->vht_capa; 178 req.vht_capa_mask = params->vht_capa_mask; 179 180 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 181 params->bssid, params->ssid, 182 params->ssid_len, &req); 183 if (err) 184 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 185 NULL, 0, 186 WLAN_REASON_DEAUTH_LEAVING, 187 false); 188 return err; 189 case CFG80211_CONN_ASSOC_FAILED: 190 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 191 NULL, 0, 192 WLAN_REASON_DEAUTH_LEAVING, false); 193 return -ENOTCONN; 194 case CFG80211_CONN_DEAUTH: 195 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 196 NULL, 0, 197 WLAN_REASON_DEAUTH_LEAVING, false); 198 /* free directly, disconnected event already sent */ 199 cfg80211_sme_free(wdev); 200 return 0; 201 default: 202 return 0; 203 } 204 } 205 206 void cfg80211_conn_work(struct work_struct *work) 207 { 208 struct cfg80211_registered_device *rdev = 209 container_of(work, struct cfg80211_registered_device, conn_work); 210 struct wireless_dev *wdev; 211 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 212 213 rtnl_lock(); 214 215 list_for_each_entry(wdev, &rdev->wdev_list, list) { 216 if (!wdev->netdev) 217 continue; 218 219 wdev_lock(wdev); 220 if (!netif_running(wdev->netdev)) { 221 wdev_unlock(wdev); 222 continue; 223 } 224 if (!wdev->conn || 225 wdev->conn->state == CFG80211_CONN_CONNECTED) { 226 wdev_unlock(wdev); 227 continue; 228 } 229 if (wdev->conn->params.bssid) { 230 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 231 bssid = bssid_buf; 232 } 233 if (cfg80211_conn_do_work(wdev)) { 234 __cfg80211_connect_result( 235 wdev->netdev, bssid, 236 NULL, 0, NULL, 0, 237 WLAN_STATUS_UNSPECIFIED_FAILURE, 238 false, NULL); 239 } 240 wdev_unlock(wdev); 241 } 242 243 rtnl_unlock(); 244 } 245 246 /* Returned bss is reference counted and must be cleaned up appropriately. */ 247 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 248 { 249 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 250 struct cfg80211_bss *bss; 251 u16 capa = WLAN_CAPABILITY_ESS; 252 253 ASSERT_WDEV_LOCK(wdev); 254 255 if (wdev->conn->params.privacy) 256 capa |= WLAN_CAPABILITY_PRIVACY; 257 258 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 259 wdev->conn->params.bssid, 260 wdev->conn->params.ssid, 261 wdev->conn->params.ssid_len, 262 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 263 capa); 264 if (!bss) 265 return NULL; 266 267 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 268 wdev->conn->params.bssid = wdev->conn->bssid; 269 wdev->conn->params.channel = bss->channel; 270 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 271 schedule_work(&rdev->conn_work); 272 273 return bss; 274 } 275 276 static void __cfg80211_sme_scan_done(struct net_device *dev) 277 { 278 struct wireless_dev *wdev = dev->ieee80211_ptr; 279 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 280 struct cfg80211_bss *bss; 281 282 ASSERT_WDEV_LOCK(wdev); 283 284 if (!wdev->conn) 285 return; 286 287 if (wdev->conn->state != CFG80211_CONN_SCANNING && 288 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 289 return; 290 291 bss = cfg80211_get_conn_bss(wdev); 292 if (bss) 293 cfg80211_put_bss(&rdev->wiphy, bss); 294 else 295 schedule_work(&rdev->conn_work); 296 } 297 298 void cfg80211_sme_scan_done(struct net_device *dev) 299 { 300 struct wireless_dev *wdev = dev->ieee80211_ptr; 301 302 wdev_lock(wdev); 303 __cfg80211_sme_scan_done(dev); 304 wdev_unlock(wdev); 305 } 306 307 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 308 { 309 struct wiphy *wiphy = wdev->wiphy; 310 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 311 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 312 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 313 314 ASSERT_WDEV_LOCK(wdev); 315 316 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 317 return; 318 319 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 320 wdev->conn->auto_auth && 321 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 322 /* select automatically between only open, shared, leap */ 323 switch (wdev->conn->params.auth_type) { 324 case NL80211_AUTHTYPE_OPEN_SYSTEM: 325 if (wdev->connect_keys) 326 wdev->conn->params.auth_type = 327 NL80211_AUTHTYPE_SHARED_KEY; 328 else 329 wdev->conn->params.auth_type = 330 NL80211_AUTHTYPE_NETWORK_EAP; 331 break; 332 case NL80211_AUTHTYPE_SHARED_KEY: 333 wdev->conn->params.auth_type = 334 NL80211_AUTHTYPE_NETWORK_EAP; 335 break; 336 default: 337 /* huh? */ 338 wdev->conn->params.auth_type = 339 NL80211_AUTHTYPE_OPEN_SYSTEM; 340 break; 341 } 342 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 343 schedule_work(&rdev->conn_work); 344 } else if (status_code != WLAN_STATUS_SUCCESS) { 345 __cfg80211_connect_result(wdev->netdev, mgmt->bssid, 346 NULL, 0, NULL, 0, 347 status_code, false, NULL); 348 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 349 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 350 schedule_work(&rdev->conn_work); 351 } 352 } 353 354 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 355 { 356 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 357 358 if (!wdev->conn) 359 return false; 360 361 if (status == WLAN_STATUS_SUCCESS) { 362 wdev->conn->state = CFG80211_CONN_CONNECTED; 363 return false; 364 } 365 366 if (wdev->conn->prev_bssid_valid) { 367 /* 368 * Some stupid APs don't accept reassoc, so we 369 * need to fall back to trying regular assoc; 370 * return true so no event is sent to userspace. 371 */ 372 wdev->conn->prev_bssid_valid = false; 373 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 374 schedule_work(&rdev->conn_work); 375 return true; 376 } 377 378 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 379 schedule_work(&rdev->conn_work); 380 return false; 381 } 382 383 void cfg80211_sme_deauth(struct wireless_dev *wdev) 384 { 385 cfg80211_sme_free(wdev); 386 } 387 388 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 389 { 390 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 391 392 if (!wdev->conn) 393 return; 394 395 wdev->conn->state = CFG80211_CONN_AUTH_FAILED; 396 schedule_work(&rdev->conn_work); 397 } 398 399 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 400 { 401 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 402 403 if (!wdev->conn) 404 return; 405 406 wdev->conn->state = CFG80211_CONN_DEAUTH; 407 schedule_work(&rdev->conn_work); 408 } 409 410 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 411 { 412 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 413 414 if (!wdev->conn) 415 return; 416 417 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 418 schedule_work(&rdev->conn_work); 419 } 420 421 static int cfg80211_sme_connect(struct wireless_dev *wdev, 422 struct cfg80211_connect_params *connect, 423 const u8 *prev_bssid) 424 { 425 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 426 struct cfg80211_bss *bss; 427 int err; 428 429 if (!rdev->ops->auth || !rdev->ops->assoc) 430 return -EOPNOTSUPP; 431 432 if (wdev->current_bss) 433 return -EALREADY; 434 435 if (WARN_ON(wdev->conn)) 436 return -EINPROGRESS; 437 438 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 439 if (!wdev->conn) 440 return -ENOMEM; 441 442 /* 443 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 444 */ 445 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 446 if (connect->bssid) { 447 wdev->conn->params.bssid = wdev->conn->bssid; 448 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 449 } 450 451 if (connect->ie) { 452 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 453 GFP_KERNEL); 454 wdev->conn->params.ie = wdev->conn->ie; 455 if (!wdev->conn->ie) { 456 kfree(wdev->conn); 457 wdev->conn = NULL; 458 return -ENOMEM; 459 } 460 } 461 462 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 463 wdev->conn->auto_auth = true; 464 /* start with open system ... should mostly work */ 465 wdev->conn->params.auth_type = 466 NL80211_AUTHTYPE_OPEN_SYSTEM; 467 } else { 468 wdev->conn->auto_auth = false; 469 } 470 471 wdev->conn->params.ssid = wdev->ssid; 472 wdev->conn->params.ssid_len = wdev->ssid_len; 473 474 /* see if we have the bss already */ 475 bss = cfg80211_get_conn_bss(wdev); 476 477 if (prev_bssid) { 478 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 479 wdev->conn->prev_bssid_valid = true; 480 } 481 482 /* we're good if we have a matching bss struct */ 483 if (bss) { 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_rdev(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_rdev(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_rdev(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 kzfree(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 cfg80211_sme_free(wdev); 652 return; 653 } 654 655 if (WARN_ON(!bss)) 656 return; 657 658 wdev->current_bss = bss_from_pub(bss); 659 660 cfg80211_upload_connect_keys(wdev); 661 662 rcu_read_lock(); 663 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 664 if (!country_ie) { 665 rcu_read_unlock(); 666 return; 667 } 668 669 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 670 rcu_read_unlock(); 671 672 if (!country_ie) 673 return; 674 675 /* 676 * ieee80211_bss_get_ie() ensures we can access: 677 * - country_ie + 2, the start of the country ie data, and 678 * - and country_ie[1] which is the IE length 679 */ 680 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band, 681 country_ie + 2, country_ie[1]); 682 kfree(country_ie); 683 } 684 685 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 686 const u8 *req_ie, size_t req_ie_len, 687 const u8 *resp_ie, size_t resp_ie_len, 688 u16 status, gfp_t gfp) 689 { 690 struct wireless_dev *wdev = dev->ieee80211_ptr; 691 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 692 struct cfg80211_event *ev; 693 unsigned long flags; 694 695 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 696 if (!ev) 697 return; 698 699 ev->type = EVENT_CONNECT_RESULT; 700 if (bssid) 701 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 702 if (req_ie_len) { 703 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 704 ev->cr.req_ie_len = req_ie_len; 705 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 706 } 707 if (resp_ie_len) { 708 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 709 ev->cr.resp_ie_len = resp_ie_len; 710 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 711 } 712 ev->cr.status = status; 713 714 spin_lock_irqsave(&wdev->event_lock, flags); 715 list_add_tail(&ev->list, &wdev->event_list); 716 spin_unlock_irqrestore(&wdev->event_lock, flags); 717 queue_work(cfg80211_wq, &rdev->event_work); 718 } 719 EXPORT_SYMBOL(cfg80211_connect_result); 720 721 /* Consumes bss object one way or another */ 722 void __cfg80211_roamed(struct wireless_dev *wdev, 723 struct cfg80211_bss *bss, 724 const u8 *req_ie, size_t req_ie_len, 725 const u8 *resp_ie, size_t resp_ie_len) 726 { 727 #ifdef CONFIG_CFG80211_WEXT 728 union iwreq_data wrqu; 729 #endif 730 ASSERT_WDEV_LOCK(wdev); 731 732 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 733 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 734 goto out; 735 736 if (WARN_ON(!wdev->current_bss)) 737 goto out; 738 739 cfg80211_unhold_bss(wdev->current_bss); 740 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 741 wdev->current_bss = NULL; 742 743 cfg80211_hold_bss(bss_from_pub(bss)); 744 wdev->current_bss = bss_from_pub(bss); 745 746 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 747 wdev->netdev, bss->bssid, 748 req_ie, req_ie_len, resp_ie, resp_ie_len, 749 GFP_KERNEL); 750 751 #ifdef CONFIG_CFG80211_WEXT 752 if (req_ie) { 753 memset(&wrqu, 0, sizeof(wrqu)); 754 wrqu.data.length = req_ie_len; 755 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 756 &wrqu, req_ie); 757 } 758 759 if (resp_ie) { 760 memset(&wrqu, 0, sizeof(wrqu)); 761 wrqu.data.length = resp_ie_len; 762 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 763 &wrqu, resp_ie); 764 } 765 766 memset(&wrqu, 0, sizeof(wrqu)); 767 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 768 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 769 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 770 wdev->wext.prev_bssid_valid = true; 771 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 772 #endif 773 774 return; 775 out: 776 cfg80211_put_bss(wdev->wiphy, bss); 777 } 778 779 void cfg80211_roamed(struct net_device *dev, 780 struct ieee80211_channel *channel, 781 const u8 *bssid, 782 const u8 *req_ie, size_t req_ie_len, 783 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 784 { 785 struct wireless_dev *wdev = dev->ieee80211_ptr; 786 struct cfg80211_bss *bss; 787 788 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 789 wdev->ssid_len, WLAN_CAPABILITY_ESS, 790 WLAN_CAPABILITY_ESS); 791 if (WARN_ON(!bss)) 792 return; 793 794 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 795 resp_ie_len, gfp); 796 } 797 EXPORT_SYMBOL(cfg80211_roamed); 798 799 /* Consumes bss object one way or another */ 800 void cfg80211_roamed_bss(struct net_device *dev, 801 struct cfg80211_bss *bss, const u8 *req_ie, 802 size_t req_ie_len, const u8 *resp_ie, 803 size_t resp_ie_len, gfp_t gfp) 804 { 805 struct wireless_dev *wdev = dev->ieee80211_ptr; 806 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 807 struct cfg80211_event *ev; 808 unsigned long flags; 809 810 if (WARN_ON(!bss)) 811 return; 812 813 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 814 if (!ev) { 815 cfg80211_put_bss(wdev->wiphy, bss); 816 return; 817 } 818 819 ev->type = EVENT_ROAMED; 820 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 821 ev->rm.req_ie_len = req_ie_len; 822 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 823 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 824 ev->rm.resp_ie_len = resp_ie_len; 825 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 826 ev->rm.bss = bss; 827 828 spin_lock_irqsave(&wdev->event_lock, flags); 829 list_add_tail(&ev->list, &wdev->event_list); 830 spin_unlock_irqrestore(&wdev->event_lock, flags); 831 queue_work(cfg80211_wq, &rdev->event_work); 832 } 833 EXPORT_SYMBOL(cfg80211_roamed_bss); 834 835 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 836 size_t ie_len, u16 reason, bool from_ap) 837 { 838 struct wireless_dev *wdev = dev->ieee80211_ptr; 839 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 840 int i; 841 #ifdef CONFIG_CFG80211_WEXT 842 union iwreq_data wrqu; 843 #endif 844 845 ASSERT_WDEV_LOCK(wdev); 846 847 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 848 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 849 return; 850 851 if (wdev->current_bss) { 852 cfg80211_unhold_bss(wdev->current_bss); 853 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 854 } 855 856 wdev->current_bss = NULL; 857 wdev->ssid_len = 0; 858 859 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 860 861 /* 862 * Delete all the keys ... pairwise keys can't really 863 * exist any more anyway, but default keys might. 864 */ 865 if (rdev->ops->del_key) 866 for (i = 0; i < 6; i++) 867 rdev_del_key(rdev, dev, i, false, NULL); 868 869 rdev_set_qos_map(rdev, dev, NULL); 870 871 #ifdef CONFIG_CFG80211_WEXT 872 memset(&wrqu, 0, sizeof(wrqu)); 873 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 874 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 875 wdev->wext.connect.ssid_len = 0; 876 #endif 877 878 schedule_work(&cfg80211_disconnect_work); 879 } 880 881 void cfg80211_disconnected(struct net_device *dev, u16 reason, 882 const u8 *ie, size_t ie_len, gfp_t gfp) 883 { 884 struct wireless_dev *wdev = dev->ieee80211_ptr; 885 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 886 struct cfg80211_event *ev; 887 unsigned long flags; 888 889 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 890 if (!ev) 891 return; 892 893 ev->type = EVENT_DISCONNECTED; 894 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 895 ev->dc.ie_len = ie_len; 896 memcpy((void *)ev->dc.ie, ie, ie_len); 897 ev->dc.reason = reason; 898 899 spin_lock_irqsave(&wdev->event_lock, flags); 900 list_add_tail(&ev->list, &wdev->event_list); 901 spin_unlock_irqrestore(&wdev->event_lock, flags); 902 queue_work(cfg80211_wq, &rdev->event_work); 903 } 904 EXPORT_SYMBOL(cfg80211_disconnected); 905 906 /* 907 * API calls for nl80211/wext compatibility code 908 */ 909 int cfg80211_connect(struct cfg80211_registered_device *rdev, 910 struct net_device *dev, 911 struct cfg80211_connect_params *connect, 912 struct cfg80211_cached_keys *connkeys, 913 const u8 *prev_bssid) 914 { 915 struct wireless_dev *wdev = dev->ieee80211_ptr; 916 int err; 917 918 ASSERT_WDEV_LOCK(wdev); 919 920 if (WARN_ON(wdev->connect_keys)) { 921 kzfree(wdev->connect_keys); 922 wdev->connect_keys = NULL; 923 } 924 925 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 926 rdev->wiphy.ht_capa_mod_mask); 927 928 if (connkeys && connkeys->def >= 0) { 929 int idx; 930 u32 cipher; 931 932 idx = connkeys->def; 933 cipher = connkeys->params[idx].cipher; 934 /* If given a WEP key we may need it for shared key auth */ 935 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 936 cipher == WLAN_CIPHER_SUITE_WEP104) { 937 connect->key_idx = idx; 938 connect->key = connkeys->params[idx].key; 939 connect->key_len = connkeys->params[idx].key_len; 940 941 /* 942 * If ciphers are not set (e.g. when going through 943 * iwconfig), we have to set them appropriately here. 944 */ 945 if (connect->crypto.cipher_group == 0) 946 connect->crypto.cipher_group = cipher; 947 948 if (connect->crypto.n_ciphers_pairwise == 0) { 949 connect->crypto.n_ciphers_pairwise = 1; 950 connect->crypto.ciphers_pairwise[0] = cipher; 951 } 952 } 953 } 954 955 wdev->connect_keys = connkeys; 956 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 957 wdev->ssid_len = connect->ssid_len; 958 959 if (!rdev->ops->connect) 960 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 961 else 962 err = rdev_connect(rdev, dev, connect); 963 964 if (err) { 965 wdev->connect_keys = NULL; 966 wdev->ssid_len = 0; 967 return err; 968 } 969 970 return 0; 971 } 972 973 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 974 struct net_device *dev, u16 reason, bool wextev) 975 { 976 struct wireless_dev *wdev = dev->ieee80211_ptr; 977 int err = 0; 978 979 ASSERT_WDEV_LOCK(wdev); 980 981 kzfree(wdev->connect_keys); 982 wdev->connect_keys = NULL; 983 984 if (wdev->conn) 985 err = cfg80211_sme_disconnect(wdev, reason); 986 else if (!rdev->ops->disconnect) 987 cfg80211_mlme_down(rdev, dev); 988 else if (wdev->current_bss) 989 err = rdev_disconnect(rdev, dev, reason); 990 991 return err; 992 } 993