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 const 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; 260 261 ASSERT_WDEV_LOCK(wdev); 262 263 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 264 wdev->conn->params.bssid, 265 wdev->conn->params.ssid, 266 wdev->conn->params.ssid_len, 267 wdev->conn_bss_type, 268 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 269 if (!bss) 270 return NULL; 271 272 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 273 wdev->conn->params.bssid = wdev->conn->bssid; 274 wdev->conn->params.channel = bss->channel; 275 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 276 schedule_work(&rdev->conn_work); 277 278 return bss; 279 } 280 281 static void __cfg80211_sme_scan_done(struct net_device *dev) 282 { 283 struct wireless_dev *wdev = dev->ieee80211_ptr; 284 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 285 struct cfg80211_bss *bss; 286 287 ASSERT_WDEV_LOCK(wdev); 288 289 if (!wdev->conn) 290 return; 291 292 if (wdev->conn->state != CFG80211_CONN_SCANNING && 293 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 294 return; 295 296 bss = cfg80211_get_conn_bss(wdev); 297 if (bss) 298 cfg80211_put_bss(&rdev->wiphy, bss); 299 else 300 schedule_work(&rdev->conn_work); 301 } 302 303 void cfg80211_sme_scan_done(struct net_device *dev) 304 { 305 struct wireless_dev *wdev = dev->ieee80211_ptr; 306 307 wdev_lock(wdev); 308 __cfg80211_sme_scan_done(dev); 309 wdev_unlock(wdev); 310 } 311 312 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 313 { 314 struct wiphy *wiphy = wdev->wiphy; 315 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 316 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 317 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 318 319 ASSERT_WDEV_LOCK(wdev); 320 321 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 322 return; 323 324 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 325 wdev->conn->auto_auth && 326 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 327 /* select automatically between only open, shared, leap */ 328 switch (wdev->conn->params.auth_type) { 329 case NL80211_AUTHTYPE_OPEN_SYSTEM: 330 if (wdev->connect_keys) 331 wdev->conn->params.auth_type = 332 NL80211_AUTHTYPE_SHARED_KEY; 333 else 334 wdev->conn->params.auth_type = 335 NL80211_AUTHTYPE_NETWORK_EAP; 336 break; 337 case NL80211_AUTHTYPE_SHARED_KEY: 338 wdev->conn->params.auth_type = 339 NL80211_AUTHTYPE_NETWORK_EAP; 340 break; 341 default: 342 /* huh? */ 343 wdev->conn->params.auth_type = 344 NL80211_AUTHTYPE_OPEN_SYSTEM; 345 break; 346 } 347 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 348 schedule_work(&rdev->conn_work); 349 } else if (status_code != WLAN_STATUS_SUCCESS) { 350 __cfg80211_connect_result(wdev->netdev, mgmt->bssid, 351 NULL, 0, NULL, 0, 352 status_code, false, NULL); 353 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 354 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 355 schedule_work(&rdev->conn_work); 356 } 357 } 358 359 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 360 { 361 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 362 363 if (!wdev->conn) 364 return false; 365 366 if (status == WLAN_STATUS_SUCCESS) { 367 wdev->conn->state = CFG80211_CONN_CONNECTED; 368 return false; 369 } 370 371 if (wdev->conn->prev_bssid_valid) { 372 /* 373 * Some stupid APs don't accept reassoc, so we 374 * need to fall back to trying regular assoc; 375 * return true so no event is sent to userspace. 376 */ 377 wdev->conn->prev_bssid_valid = false; 378 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 379 schedule_work(&rdev->conn_work); 380 return true; 381 } 382 383 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 384 schedule_work(&rdev->conn_work); 385 return false; 386 } 387 388 void cfg80211_sme_deauth(struct wireless_dev *wdev) 389 { 390 cfg80211_sme_free(wdev); 391 } 392 393 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 394 { 395 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 396 397 if (!wdev->conn) 398 return; 399 400 wdev->conn->state = CFG80211_CONN_AUTH_FAILED; 401 schedule_work(&rdev->conn_work); 402 } 403 404 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 405 { 406 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 407 408 if (!wdev->conn) 409 return; 410 411 wdev->conn->state = CFG80211_CONN_DEAUTH; 412 schedule_work(&rdev->conn_work); 413 } 414 415 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 416 { 417 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 418 419 if (!wdev->conn) 420 return; 421 422 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 423 schedule_work(&rdev->conn_work); 424 } 425 426 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 427 const u8 *ies, size_t ies_len, 428 const u8 **out_ies, size_t *out_ies_len) 429 { 430 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 431 u8 *buf; 432 size_t offs; 433 434 if (!rdev->wiphy.extended_capabilities_len || 435 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 436 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 437 if (!*out_ies) 438 return -ENOMEM; 439 *out_ies_len = ies_len; 440 return 0; 441 } 442 443 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 444 GFP_KERNEL); 445 if (!buf) 446 return -ENOMEM; 447 448 if (ies_len) { 449 static const u8 before_extcapa[] = { 450 /* not listing IEs expected to be created by driver */ 451 WLAN_EID_RSN, 452 WLAN_EID_QOS_CAPA, 453 WLAN_EID_RRM_ENABLED_CAPABILITIES, 454 WLAN_EID_MOBILITY_DOMAIN, 455 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 456 WLAN_EID_BSS_COEX_2040, 457 }; 458 459 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 460 ARRAY_SIZE(before_extcapa), 0); 461 memcpy(buf, ies, offs); 462 /* leave a whole for extended capabilities IE */ 463 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 464 ies + offs, ies_len - offs); 465 } else { 466 offs = 0; 467 } 468 469 /* place extended capabilities IE (with only driver capabilities) */ 470 buf[offs] = WLAN_EID_EXT_CAPABILITY; 471 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 472 memcpy(buf + offs + 2, 473 rdev->wiphy.extended_capabilities, 474 rdev->wiphy.extended_capabilities_len); 475 476 *out_ies = buf; 477 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 478 479 return 0; 480 } 481 482 static int cfg80211_sme_connect(struct wireless_dev *wdev, 483 struct cfg80211_connect_params *connect, 484 const u8 *prev_bssid) 485 { 486 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 487 struct cfg80211_bss *bss; 488 int err; 489 490 if (!rdev->ops->auth || !rdev->ops->assoc) 491 return -EOPNOTSUPP; 492 493 if (wdev->current_bss) 494 return -EALREADY; 495 496 if (WARN_ON(wdev->conn)) 497 return -EINPROGRESS; 498 499 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 500 if (!wdev->conn) 501 return -ENOMEM; 502 503 /* 504 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 505 */ 506 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 507 if (connect->bssid) { 508 wdev->conn->params.bssid = wdev->conn->bssid; 509 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 510 } 511 512 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 513 &wdev->conn->ie, 514 &wdev->conn->params.ie_len)) { 515 kfree(wdev->conn); 516 wdev->conn = NULL; 517 return -ENOMEM; 518 } 519 wdev->conn->params.ie = wdev->conn->ie; 520 521 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 522 wdev->conn->auto_auth = true; 523 /* start with open system ... should mostly work */ 524 wdev->conn->params.auth_type = 525 NL80211_AUTHTYPE_OPEN_SYSTEM; 526 } else { 527 wdev->conn->auto_auth = false; 528 } 529 530 wdev->conn->params.ssid = wdev->ssid; 531 wdev->conn->params.ssid_len = wdev->ssid_len; 532 533 /* see if we have the bss already */ 534 bss = cfg80211_get_conn_bss(wdev); 535 536 if (prev_bssid) { 537 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 538 wdev->conn->prev_bssid_valid = true; 539 } 540 541 /* we're good if we have a matching bss struct */ 542 if (bss) { 543 err = cfg80211_conn_do_work(wdev); 544 cfg80211_put_bss(wdev->wiphy, bss); 545 } else { 546 /* otherwise we'll need to scan for the AP first */ 547 err = cfg80211_conn_scan(wdev); 548 549 /* 550 * If we can't scan right now, then we need to scan again 551 * after the current scan finished, since the parameters 552 * changed (unless we find a good AP anyway). 553 */ 554 if (err == -EBUSY) { 555 err = 0; 556 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 557 } 558 } 559 560 if (err) 561 cfg80211_sme_free(wdev); 562 563 return err; 564 } 565 566 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 567 { 568 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 569 int err; 570 571 if (!wdev->conn) 572 return 0; 573 574 if (!rdev->ops->deauth) 575 return -EOPNOTSUPP; 576 577 if (wdev->conn->state == CFG80211_CONN_SCANNING || 578 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 579 err = 0; 580 goto out; 581 } 582 583 /* wdev->conn->params.bssid must be set if > SCANNING */ 584 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 585 wdev->conn->params.bssid, 586 NULL, 0, reason, false); 587 out: 588 cfg80211_sme_free(wdev); 589 return err; 590 } 591 592 /* 593 * code shared for in-device and software SME 594 */ 595 596 static bool cfg80211_is_all_idle(void) 597 { 598 struct cfg80211_registered_device *rdev; 599 struct wireless_dev *wdev; 600 bool is_all_idle = true; 601 602 /* 603 * All devices must be idle as otherwise if you are actively 604 * scanning some new beacon hints could be learned and would 605 * count as new regulatory hints. 606 */ 607 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 608 list_for_each_entry(wdev, &rdev->wdev_list, list) { 609 wdev_lock(wdev); 610 if (wdev->conn || wdev->current_bss) 611 is_all_idle = false; 612 wdev_unlock(wdev); 613 } 614 } 615 616 return is_all_idle; 617 } 618 619 static void disconnect_work(struct work_struct *work) 620 { 621 rtnl_lock(); 622 if (cfg80211_is_all_idle()) 623 regulatory_hint_disconnect(); 624 rtnl_unlock(); 625 } 626 627 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 628 629 630 /* 631 * API calls for drivers implementing connect/disconnect and 632 * SME event handling 633 */ 634 635 /* This method must consume bss one way or another */ 636 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 637 const u8 *req_ie, size_t req_ie_len, 638 const u8 *resp_ie, size_t resp_ie_len, 639 u16 status, bool wextev, 640 struct cfg80211_bss *bss) 641 { 642 struct wireless_dev *wdev = dev->ieee80211_ptr; 643 const u8 *country_ie; 644 #ifdef CONFIG_CFG80211_WEXT 645 union iwreq_data wrqu; 646 #endif 647 648 ASSERT_WDEV_LOCK(wdev); 649 650 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 651 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 652 cfg80211_put_bss(wdev->wiphy, bss); 653 return; 654 } 655 656 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, 657 bssid, req_ie, req_ie_len, 658 resp_ie, resp_ie_len, 659 status, GFP_KERNEL); 660 661 #ifdef CONFIG_CFG80211_WEXT 662 if (wextev) { 663 if (req_ie && status == WLAN_STATUS_SUCCESS) { 664 memset(&wrqu, 0, sizeof(wrqu)); 665 wrqu.data.length = req_ie_len; 666 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 667 } 668 669 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 670 memset(&wrqu, 0, sizeof(wrqu)); 671 wrqu.data.length = resp_ie_len; 672 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 673 } 674 675 memset(&wrqu, 0, sizeof(wrqu)); 676 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 677 if (bssid && status == WLAN_STATUS_SUCCESS) { 678 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 679 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 680 wdev->wext.prev_bssid_valid = true; 681 } 682 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 683 } 684 #endif 685 686 if (!bss && (status == WLAN_STATUS_SUCCESS)) { 687 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 688 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, 689 wdev->ssid, wdev->ssid_len, 690 wdev->conn_bss_type, 691 IEEE80211_PRIVACY_ANY); 692 if (bss) 693 cfg80211_hold_bss(bss_from_pub(bss)); 694 } 695 696 if (wdev->current_bss) { 697 cfg80211_unhold_bss(wdev->current_bss); 698 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 699 wdev->current_bss = NULL; 700 } 701 702 if (status != WLAN_STATUS_SUCCESS) { 703 kzfree(wdev->connect_keys); 704 wdev->connect_keys = NULL; 705 wdev->ssid_len = 0; 706 if (bss) { 707 cfg80211_unhold_bss(bss_from_pub(bss)); 708 cfg80211_put_bss(wdev->wiphy, bss); 709 } 710 cfg80211_sme_free(wdev); 711 return; 712 } 713 714 if (WARN_ON(!bss)) 715 return; 716 717 wdev->current_bss = bss_from_pub(bss); 718 719 cfg80211_upload_connect_keys(wdev); 720 721 rcu_read_lock(); 722 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 723 if (!country_ie) { 724 rcu_read_unlock(); 725 return; 726 } 727 728 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 729 rcu_read_unlock(); 730 731 if (!country_ie) 732 return; 733 734 /* 735 * ieee80211_bss_get_ie() ensures we can access: 736 * - country_ie + 2, the start of the country ie data, and 737 * - and country_ie[1] which is the IE length 738 */ 739 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band, 740 country_ie + 2, country_ie[1]); 741 kfree(country_ie); 742 } 743 744 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 745 const u8 *req_ie, size_t req_ie_len, 746 const u8 *resp_ie, size_t resp_ie_len, 747 u16 status, gfp_t gfp) 748 { 749 struct wireless_dev *wdev = dev->ieee80211_ptr; 750 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 751 struct cfg80211_event *ev; 752 unsigned long flags; 753 754 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 755 if (!ev) 756 return; 757 758 ev->type = EVENT_CONNECT_RESULT; 759 if (bssid) 760 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 761 if (req_ie_len) { 762 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 763 ev->cr.req_ie_len = req_ie_len; 764 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 765 } 766 if (resp_ie_len) { 767 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 768 ev->cr.resp_ie_len = resp_ie_len; 769 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 770 } 771 ev->cr.status = status; 772 773 spin_lock_irqsave(&wdev->event_lock, flags); 774 list_add_tail(&ev->list, &wdev->event_list); 775 spin_unlock_irqrestore(&wdev->event_lock, flags); 776 queue_work(cfg80211_wq, &rdev->event_work); 777 } 778 EXPORT_SYMBOL(cfg80211_connect_result); 779 780 /* Consumes bss object one way or another */ 781 void __cfg80211_roamed(struct wireless_dev *wdev, 782 struct cfg80211_bss *bss, 783 const u8 *req_ie, size_t req_ie_len, 784 const u8 *resp_ie, size_t resp_ie_len) 785 { 786 #ifdef CONFIG_CFG80211_WEXT 787 union iwreq_data wrqu; 788 #endif 789 ASSERT_WDEV_LOCK(wdev); 790 791 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 792 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 793 goto out; 794 795 if (WARN_ON(!wdev->current_bss)) 796 goto out; 797 798 cfg80211_unhold_bss(wdev->current_bss); 799 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 800 wdev->current_bss = NULL; 801 802 cfg80211_hold_bss(bss_from_pub(bss)); 803 wdev->current_bss = bss_from_pub(bss); 804 805 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 806 wdev->netdev, bss->bssid, 807 req_ie, req_ie_len, resp_ie, resp_ie_len, 808 GFP_KERNEL); 809 810 #ifdef CONFIG_CFG80211_WEXT 811 if (req_ie) { 812 memset(&wrqu, 0, sizeof(wrqu)); 813 wrqu.data.length = req_ie_len; 814 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 815 &wrqu, req_ie); 816 } 817 818 if (resp_ie) { 819 memset(&wrqu, 0, sizeof(wrqu)); 820 wrqu.data.length = resp_ie_len; 821 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 822 &wrqu, resp_ie); 823 } 824 825 memset(&wrqu, 0, sizeof(wrqu)); 826 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 827 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 828 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 829 wdev->wext.prev_bssid_valid = true; 830 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 831 #endif 832 833 return; 834 out: 835 cfg80211_put_bss(wdev->wiphy, bss); 836 } 837 838 void cfg80211_roamed(struct net_device *dev, 839 struct ieee80211_channel *channel, 840 const u8 *bssid, 841 const u8 *req_ie, size_t req_ie_len, 842 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 843 { 844 struct wireless_dev *wdev = dev->ieee80211_ptr; 845 struct cfg80211_bss *bss; 846 847 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 848 wdev->ssid_len, 849 wdev->conn_bss_type, IEEE80211_PRIVACY_ANY); 850 if (WARN_ON(!bss)) 851 return; 852 853 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 854 resp_ie_len, gfp); 855 } 856 EXPORT_SYMBOL(cfg80211_roamed); 857 858 /* Consumes bss object one way or another */ 859 void cfg80211_roamed_bss(struct net_device *dev, 860 struct cfg80211_bss *bss, const u8 *req_ie, 861 size_t req_ie_len, const u8 *resp_ie, 862 size_t resp_ie_len, gfp_t gfp) 863 { 864 struct wireless_dev *wdev = dev->ieee80211_ptr; 865 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 866 struct cfg80211_event *ev; 867 unsigned long flags; 868 869 if (WARN_ON(!bss)) 870 return; 871 872 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 873 if (!ev) { 874 cfg80211_put_bss(wdev->wiphy, bss); 875 return; 876 } 877 878 ev->type = EVENT_ROAMED; 879 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 880 ev->rm.req_ie_len = req_ie_len; 881 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 882 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 883 ev->rm.resp_ie_len = resp_ie_len; 884 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 885 ev->rm.bss = bss; 886 887 spin_lock_irqsave(&wdev->event_lock, flags); 888 list_add_tail(&ev->list, &wdev->event_list); 889 spin_unlock_irqrestore(&wdev->event_lock, flags); 890 queue_work(cfg80211_wq, &rdev->event_work); 891 } 892 EXPORT_SYMBOL(cfg80211_roamed_bss); 893 894 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 895 size_t ie_len, u16 reason, bool from_ap) 896 { 897 struct wireless_dev *wdev = dev->ieee80211_ptr; 898 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 899 int i; 900 #ifdef CONFIG_CFG80211_WEXT 901 union iwreq_data wrqu; 902 #endif 903 904 ASSERT_WDEV_LOCK(wdev); 905 906 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 907 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 908 return; 909 910 if (wdev->current_bss) { 911 cfg80211_unhold_bss(wdev->current_bss); 912 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 913 } 914 915 wdev->current_bss = NULL; 916 wdev->ssid_len = 0; 917 918 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 919 920 /* stop critical protocol if supported */ 921 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 922 rdev->crit_proto_nlportid = 0; 923 rdev_crit_proto_stop(rdev, wdev); 924 } 925 926 /* 927 * Delete all the keys ... pairwise keys can't really 928 * exist any more anyway, but default keys might. 929 */ 930 if (rdev->ops->del_key) 931 for (i = 0; i < 6; i++) 932 rdev_del_key(rdev, dev, i, false, NULL); 933 934 rdev_set_qos_map(rdev, dev, NULL); 935 936 #ifdef CONFIG_CFG80211_WEXT 937 memset(&wrqu, 0, sizeof(wrqu)); 938 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 939 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 940 wdev->wext.connect.ssid_len = 0; 941 #endif 942 943 schedule_work(&cfg80211_disconnect_work); 944 } 945 946 void cfg80211_disconnected(struct net_device *dev, u16 reason, 947 const u8 *ie, size_t ie_len, 948 bool locally_generated, gfp_t gfp) 949 { 950 struct wireless_dev *wdev = dev->ieee80211_ptr; 951 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 952 struct cfg80211_event *ev; 953 unsigned long flags; 954 955 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 956 if (!ev) 957 return; 958 959 ev->type = EVENT_DISCONNECTED; 960 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 961 ev->dc.ie_len = ie_len; 962 memcpy((void *)ev->dc.ie, ie, ie_len); 963 ev->dc.reason = reason; 964 ev->dc.locally_generated = locally_generated; 965 966 spin_lock_irqsave(&wdev->event_lock, flags); 967 list_add_tail(&ev->list, &wdev->event_list); 968 spin_unlock_irqrestore(&wdev->event_lock, flags); 969 queue_work(cfg80211_wq, &rdev->event_work); 970 } 971 EXPORT_SYMBOL(cfg80211_disconnected); 972 973 /* 974 * API calls for nl80211/wext compatibility code 975 */ 976 int cfg80211_connect(struct cfg80211_registered_device *rdev, 977 struct net_device *dev, 978 struct cfg80211_connect_params *connect, 979 struct cfg80211_cached_keys *connkeys, 980 const u8 *prev_bssid) 981 { 982 struct wireless_dev *wdev = dev->ieee80211_ptr; 983 int err; 984 985 ASSERT_WDEV_LOCK(wdev); 986 987 if (WARN_ON(wdev->connect_keys)) { 988 kzfree(wdev->connect_keys); 989 wdev->connect_keys = NULL; 990 } 991 992 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 993 rdev->wiphy.ht_capa_mod_mask); 994 995 if (connkeys && connkeys->def >= 0) { 996 int idx; 997 u32 cipher; 998 999 idx = connkeys->def; 1000 cipher = connkeys->params[idx].cipher; 1001 /* If given a WEP key we may need it for shared key auth */ 1002 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1003 cipher == WLAN_CIPHER_SUITE_WEP104) { 1004 connect->key_idx = idx; 1005 connect->key = connkeys->params[idx].key; 1006 connect->key_len = connkeys->params[idx].key_len; 1007 1008 /* 1009 * If ciphers are not set (e.g. when going through 1010 * iwconfig), we have to set them appropriately here. 1011 */ 1012 if (connect->crypto.cipher_group == 0) 1013 connect->crypto.cipher_group = cipher; 1014 1015 if (connect->crypto.n_ciphers_pairwise == 0) { 1016 connect->crypto.n_ciphers_pairwise = 1; 1017 connect->crypto.ciphers_pairwise[0] = cipher; 1018 } 1019 } 1020 } 1021 1022 wdev->connect_keys = connkeys; 1023 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 1024 wdev->ssid_len = connect->ssid_len; 1025 1026 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1027 IEEE80211_BSS_TYPE_ESS; 1028 1029 if (!rdev->ops->connect) 1030 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1031 else 1032 err = rdev_connect(rdev, dev, connect); 1033 1034 if (err) { 1035 wdev->connect_keys = NULL; 1036 wdev->ssid_len = 0; 1037 return err; 1038 } 1039 1040 return 0; 1041 } 1042 1043 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1044 struct net_device *dev, u16 reason, bool wextev) 1045 { 1046 struct wireless_dev *wdev = dev->ieee80211_ptr; 1047 int err = 0; 1048 1049 ASSERT_WDEV_LOCK(wdev); 1050 1051 kzfree(wdev->connect_keys); 1052 wdev->connect_keys = NULL; 1053 1054 if (wdev->conn) 1055 err = cfg80211_sme_disconnect(wdev, reason); 1056 else if (!rdev->ops->disconnect) 1057 cfg80211_mlme_down(rdev, dev); 1058 else if (wdev->current_bss) 1059 err = rdev_disconnect(rdev, dev, reason); 1060 1061 return err; 1062 } 1063