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_ASSOCIATE_NEXT, 38 CFG80211_CONN_ASSOCIATING, 39 CFG80211_CONN_DEAUTH, 40 CFG80211_CONN_CONNECTED, 41 } state; 42 u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; 43 u8 *ie; 44 size_t ie_len; 45 bool auto_auth, prev_bssid_valid; 46 }; 47 48 static void cfg80211_sme_free(struct wireless_dev *wdev) 49 { 50 if (!wdev->conn) 51 return; 52 53 kfree(wdev->conn->ie); 54 kfree(wdev->conn); 55 wdev->conn = NULL; 56 } 57 58 static int cfg80211_conn_scan(struct wireless_dev *wdev) 59 { 60 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 61 struct cfg80211_scan_request *request; 62 int n_channels, err; 63 64 ASSERT_RTNL(); 65 ASSERT_RDEV_LOCK(rdev); 66 ASSERT_WDEV_LOCK(wdev); 67 68 if (rdev->scan_req) 69 return -EBUSY; 70 71 if (wdev->conn->params.channel) { 72 n_channels = 1; 73 } else { 74 enum ieee80211_band band; 75 n_channels = 0; 76 77 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 78 if (!wdev->wiphy->bands[band]) 79 continue; 80 n_channels += wdev->wiphy->bands[band]->n_channels; 81 } 82 } 83 request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + 84 sizeof(request->channels[0]) * n_channels, 85 GFP_KERNEL); 86 if (!request) 87 return -ENOMEM; 88 89 if (wdev->conn->params.channel) 90 request->channels[0] = wdev->conn->params.channel; 91 else { 92 int i = 0, j; 93 enum ieee80211_band band; 94 struct ieee80211_supported_band *bands; 95 struct ieee80211_channel *channel; 96 97 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 98 bands = wdev->wiphy->bands[band]; 99 if (!bands) 100 continue; 101 for (j = 0; j < bands->n_channels; j++) { 102 channel = &bands->channels[j]; 103 if (channel->flags & IEEE80211_CHAN_DISABLED) 104 continue; 105 request->channels[i++] = channel; 106 } 107 request->rates[band] = (1 << bands->n_bitrates) - 1; 108 } 109 n_channels = i; 110 } 111 request->n_channels = n_channels; 112 request->ssids = (void *)&request->channels[n_channels]; 113 request->n_ssids = 1; 114 115 memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, 116 wdev->conn->params.ssid_len); 117 request->ssids[0].ssid_len = wdev->conn->params.ssid_len; 118 119 request->wdev = wdev; 120 request->wiphy = &rdev->wiphy; 121 request->scan_start = jiffies; 122 123 rdev->scan_req = request; 124 125 err = rdev_scan(rdev, request); 126 if (!err) { 127 wdev->conn->state = CFG80211_CONN_SCANNING; 128 nl80211_send_scan_start(rdev, wdev); 129 dev_hold(wdev->netdev); 130 } else { 131 rdev->scan_req = NULL; 132 kfree(request); 133 } 134 return err; 135 } 136 137 static int cfg80211_conn_do_work(struct wireless_dev *wdev) 138 { 139 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 140 struct cfg80211_connect_params *params; 141 struct cfg80211_assoc_request req = {}; 142 int err; 143 144 ASSERT_WDEV_LOCK(wdev); 145 146 if (!wdev->conn) 147 return 0; 148 149 params = &wdev->conn->params; 150 151 switch (wdev->conn->state) { 152 case CFG80211_CONN_SCANNING: 153 /* didn't find it during scan ... */ 154 return -ENOENT; 155 case CFG80211_CONN_SCAN_AGAIN: 156 return cfg80211_conn_scan(wdev); 157 case CFG80211_CONN_AUTHENTICATE_NEXT: 158 BUG_ON(!rdev->ops->auth); 159 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 160 return cfg80211_mlme_auth(rdev, wdev->netdev, 161 params->channel, params->auth_type, 162 params->bssid, 163 params->ssid, params->ssid_len, 164 NULL, 0, 165 params->key, params->key_len, 166 params->key_idx, NULL, 0); 167 case CFG80211_CONN_ASSOCIATE_NEXT: 168 BUG_ON(!rdev->ops->assoc); 169 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 170 if (wdev->conn->prev_bssid_valid) 171 req.prev_bssid = wdev->conn->prev_bssid; 172 req.ie = params->ie; 173 req.ie_len = params->ie_len; 174 req.use_mfp = params->mfp != NL80211_MFP_NO; 175 req.crypto = params->crypto; 176 req.flags = params->flags; 177 req.ht_capa = params->ht_capa; 178 req.ht_capa_mask = params->ht_capa_mask; 179 req.vht_capa = params->vht_capa; 180 req.vht_capa_mask = params->vht_capa_mask; 181 182 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 183 params->bssid, params->ssid, 184 params->ssid_len, &req); 185 if (err) 186 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 187 NULL, 0, 188 WLAN_REASON_DEAUTH_LEAVING, 189 false); 190 return err; 191 case CFG80211_CONN_DEAUTH: 192 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 193 NULL, 0, 194 WLAN_REASON_DEAUTH_LEAVING, false); 195 return 0; 196 default: 197 return 0; 198 } 199 } 200 201 void cfg80211_conn_work(struct work_struct *work) 202 { 203 struct cfg80211_registered_device *rdev = 204 container_of(work, struct cfg80211_registered_device, conn_work); 205 struct wireless_dev *wdev; 206 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 207 208 rtnl_lock(); 209 210 list_for_each_entry(wdev, &rdev->wdev_list, list) { 211 if (!wdev->netdev) 212 continue; 213 214 wdev_lock(wdev); 215 if (!netif_running(wdev->netdev)) { 216 wdev_unlock(wdev); 217 continue; 218 } 219 if (!wdev->conn || 220 wdev->conn->state == CFG80211_CONN_CONNECTED) { 221 wdev_unlock(wdev); 222 continue; 223 } 224 if (wdev->conn->params.bssid) { 225 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 226 bssid = bssid_buf; 227 } 228 if (cfg80211_conn_do_work(wdev)) { 229 __cfg80211_connect_result( 230 wdev->netdev, bssid, 231 NULL, 0, NULL, 0, 232 WLAN_STATUS_UNSPECIFIED_FAILURE, 233 false, NULL); 234 cfg80211_sme_free(wdev); 235 } 236 wdev_unlock(wdev); 237 } 238 239 rtnl_unlock(); 240 } 241 242 /* Returned bss is reference counted and must be cleaned up appropriately. */ 243 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 244 { 245 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 246 struct cfg80211_bss *bss; 247 u16 capa = WLAN_CAPABILITY_ESS; 248 249 ASSERT_WDEV_LOCK(wdev); 250 251 if (wdev->conn->params.privacy) 252 capa |= WLAN_CAPABILITY_PRIVACY; 253 254 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 255 wdev->conn->params.bssid, 256 wdev->conn->params.ssid, 257 wdev->conn->params.ssid_len, 258 WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, 259 capa); 260 if (!bss) 261 return NULL; 262 263 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 264 wdev->conn->params.bssid = wdev->conn->bssid; 265 wdev->conn->params.channel = bss->channel; 266 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 267 schedule_work(&rdev->conn_work); 268 269 return bss; 270 } 271 272 static void __cfg80211_sme_scan_done(struct net_device *dev) 273 { 274 struct wireless_dev *wdev = dev->ieee80211_ptr; 275 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 276 struct cfg80211_bss *bss; 277 278 ASSERT_WDEV_LOCK(wdev); 279 280 if (!wdev->conn) 281 return; 282 283 if (wdev->conn->state != CFG80211_CONN_SCANNING && 284 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 285 return; 286 287 bss = cfg80211_get_conn_bss(wdev); 288 if (bss) 289 cfg80211_put_bss(&rdev->wiphy, bss); 290 else 291 schedule_work(&rdev->conn_work); 292 } 293 294 void cfg80211_sme_scan_done(struct net_device *dev) 295 { 296 struct wireless_dev *wdev = dev->ieee80211_ptr; 297 298 wdev_lock(wdev); 299 __cfg80211_sme_scan_done(dev); 300 wdev_unlock(wdev); 301 } 302 303 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 304 { 305 struct wiphy *wiphy = wdev->wiphy; 306 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); 307 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 308 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 309 310 ASSERT_WDEV_LOCK(wdev); 311 312 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 313 return; 314 315 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 316 wdev->conn->auto_auth && 317 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 318 /* select automatically between only open, shared, leap */ 319 switch (wdev->conn->params.auth_type) { 320 case NL80211_AUTHTYPE_OPEN_SYSTEM: 321 if (wdev->connect_keys) 322 wdev->conn->params.auth_type = 323 NL80211_AUTHTYPE_SHARED_KEY; 324 else 325 wdev->conn->params.auth_type = 326 NL80211_AUTHTYPE_NETWORK_EAP; 327 break; 328 case NL80211_AUTHTYPE_SHARED_KEY: 329 wdev->conn->params.auth_type = 330 NL80211_AUTHTYPE_NETWORK_EAP; 331 break; 332 default: 333 /* huh? */ 334 wdev->conn->params.auth_type = 335 NL80211_AUTHTYPE_OPEN_SYSTEM; 336 break; 337 } 338 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 339 schedule_work(&rdev->conn_work); 340 } else if (status_code != WLAN_STATUS_SUCCESS) { 341 __cfg80211_connect_result(wdev->netdev, mgmt->bssid, 342 NULL, 0, NULL, 0, 343 status_code, false, NULL); 344 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 345 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 346 schedule_work(&rdev->conn_work); 347 } 348 } 349 350 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 351 { 352 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 353 354 if (!wdev->conn) 355 return false; 356 357 if (status == WLAN_STATUS_SUCCESS) { 358 wdev->conn->state = CFG80211_CONN_CONNECTED; 359 return false; 360 } 361 362 if (wdev->conn->prev_bssid_valid) { 363 /* 364 * Some stupid APs don't accept reassoc, so we 365 * need to fall back to trying regular assoc; 366 * return true so no event is sent to userspace. 367 */ 368 wdev->conn->prev_bssid_valid = false; 369 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 370 schedule_work(&rdev->conn_work); 371 return true; 372 } 373 374 wdev->conn->state = CFG80211_CONN_DEAUTH; 375 schedule_work(&rdev->conn_work); 376 return false; 377 } 378 379 void cfg80211_sme_deauth(struct wireless_dev *wdev) 380 { 381 cfg80211_sme_free(wdev); 382 } 383 384 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 385 { 386 cfg80211_sme_free(wdev); 387 } 388 389 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 390 { 391 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 392 393 if (!wdev->conn) 394 return; 395 396 wdev->conn->state = CFG80211_CONN_DEAUTH; 397 schedule_work(&rdev->conn_work); 398 } 399 400 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 401 { 402 cfg80211_sme_disassoc(wdev); 403 } 404 405 static int cfg80211_sme_connect(struct wireless_dev *wdev, 406 struct cfg80211_connect_params *connect, 407 const u8 *prev_bssid) 408 { 409 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 410 struct cfg80211_bss *bss; 411 int err; 412 413 if (!rdev->ops->auth || !rdev->ops->assoc) 414 return -EOPNOTSUPP; 415 416 if (wdev->current_bss) 417 return -EALREADY; 418 419 if (WARN_ON(wdev->conn)) 420 return -EINPROGRESS; 421 422 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 423 if (!wdev->conn) 424 return -ENOMEM; 425 426 /* 427 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 428 */ 429 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 430 if (connect->bssid) { 431 wdev->conn->params.bssid = wdev->conn->bssid; 432 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 433 } 434 435 if (connect->ie) { 436 wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, 437 GFP_KERNEL); 438 wdev->conn->params.ie = wdev->conn->ie; 439 if (!wdev->conn->ie) { 440 kfree(wdev->conn); 441 wdev->conn = NULL; 442 return -ENOMEM; 443 } 444 } 445 446 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 447 wdev->conn->auto_auth = true; 448 /* start with open system ... should mostly work */ 449 wdev->conn->params.auth_type = 450 NL80211_AUTHTYPE_OPEN_SYSTEM; 451 } else { 452 wdev->conn->auto_auth = false; 453 } 454 455 wdev->conn->params.ssid = wdev->ssid; 456 wdev->conn->params.ssid_len = connect->ssid_len; 457 458 /* see if we have the bss already */ 459 bss = cfg80211_get_conn_bss(wdev); 460 461 if (prev_bssid) { 462 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 463 wdev->conn->prev_bssid_valid = true; 464 } 465 466 /* we're good if we have a matching bss struct */ 467 if (bss) { 468 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 469 err = cfg80211_conn_do_work(wdev); 470 cfg80211_put_bss(wdev->wiphy, bss); 471 } else { 472 /* otherwise we'll need to scan for the AP first */ 473 err = cfg80211_conn_scan(wdev); 474 475 /* 476 * If we can't scan right now, then we need to scan again 477 * after the current scan finished, since the parameters 478 * changed (unless we find a good AP anyway). 479 */ 480 if (err == -EBUSY) { 481 err = 0; 482 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 483 } 484 } 485 486 if (err) 487 cfg80211_sme_free(wdev); 488 489 return err; 490 } 491 492 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 493 { 494 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 495 int err; 496 497 if (!wdev->conn) 498 return 0; 499 500 if (!rdev->ops->deauth) 501 return -EOPNOTSUPP; 502 503 if (wdev->conn->state == CFG80211_CONN_SCANNING || 504 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 505 err = 0; 506 goto out; 507 } 508 509 /* wdev->conn->params.bssid must be set if > SCANNING */ 510 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 511 wdev->conn->params.bssid, 512 NULL, 0, reason, false); 513 out: 514 cfg80211_sme_free(wdev); 515 return err; 516 } 517 518 /* 519 * code shared for in-device and software SME 520 */ 521 522 static bool cfg80211_is_all_idle(void) 523 { 524 struct cfg80211_registered_device *rdev; 525 struct wireless_dev *wdev; 526 bool is_all_idle = true; 527 528 /* 529 * All devices must be idle as otherwise if you are actively 530 * scanning some new beacon hints could be learned and would 531 * count as new regulatory hints. 532 */ 533 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 534 list_for_each_entry(wdev, &rdev->wdev_list, list) { 535 wdev_lock(wdev); 536 if (wdev->conn || wdev->current_bss) 537 is_all_idle = false; 538 wdev_unlock(wdev); 539 } 540 } 541 542 return is_all_idle; 543 } 544 545 static void disconnect_work(struct work_struct *work) 546 { 547 rtnl_lock(); 548 if (cfg80211_is_all_idle()) 549 regulatory_hint_disconnect(); 550 rtnl_unlock(); 551 } 552 553 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 554 555 556 /* 557 * API calls for drivers implementing connect/disconnect and 558 * SME event handling 559 */ 560 561 /* This method must consume bss one way or another */ 562 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 563 const u8 *req_ie, size_t req_ie_len, 564 const u8 *resp_ie, size_t resp_ie_len, 565 u16 status, bool wextev, 566 struct cfg80211_bss *bss) 567 { 568 struct wireless_dev *wdev = dev->ieee80211_ptr; 569 const u8 *country_ie; 570 #ifdef CONFIG_CFG80211_WEXT 571 union iwreq_data wrqu; 572 #endif 573 574 ASSERT_WDEV_LOCK(wdev); 575 576 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 577 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 578 cfg80211_put_bss(wdev->wiphy, bss); 579 return; 580 } 581 582 nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, 583 bssid, req_ie, req_ie_len, 584 resp_ie, resp_ie_len, 585 status, GFP_KERNEL); 586 587 #ifdef CONFIG_CFG80211_WEXT 588 if (wextev) { 589 if (req_ie && status == WLAN_STATUS_SUCCESS) { 590 memset(&wrqu, 0, sizeof(wrqu)); 591 wrqu.data.length = req_ie_len; 592 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 593 } 594 595 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 596 memset(&wrqu, 0, sizeof(wrqu)); 597 wrqu.data.length = resp_ie_len; 598 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 599 } 600 601 memset(&wrqu, 0, sizeof(wrqu)); 602 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 603 if (bssid && status == WLAN_STATUS_SUCCESS) { 604 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 605 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 606 wdev->wext.prev_bssid_valid = true; 607 } 608 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 609 } 610 #endif 611 612 if (wdev->current_bss) { 613 cfg80211_unhold_bss(wdev->current_bss); 614 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 615 wdev->current_bss = NULL; 616 } 617 618 if (status != WLAN_STATUS_SUCCESS) { 619 kfree(wdev->connect_keys); 620 wdev->connect_keys = NULL; 621 wdev->ssid_len = 0; 622 if (bss) { 623 cfg80211_unhold_bss(bss_from_pub(bss)); 624 cfg80211_put_bss(wdev->wiphy, bss); 625 } 626 return; 627 } 628 629 if (!bss) { 630 WARN_ON_ONCE(!wiphy_to_dev(wdev->wiphy)->ops->connect); 631 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, 632 wdev->ssid, wdev->ssid_len, 633 WLAN_CAPABILITY_ESS, 634 WLAN_CAPABILITY_ESS); 635 if (WARN_ON(!bss)) 636 return; 637 cfg80211_hold_bss(bss_from_pub(bss)); 638 } 639 640 wdev->current_bss = bss_from_pub(bss); 641 642 cfg80211_upload_connect_keys(wdev); 643 644 rcu_read_lock(); 645 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 646 if (!country_ie) { 647 rcu_read_unlock(); 648 return; 649 } 650 651 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 652 rcu_read_unlock(); 653 654 if (!country_ie) 655 return; 656 657 /* 658 * ieee80211_bss_get_ie() ensures we can access: 659 * - country_ie + 2, the start of the country ie data, and 660 * - and country_ie[1] which is the IE length 661 */ 662 regulatory_hint_11d(wdev->wiphy, bss->channel->band, 663 country_ie + 2, country_ie[1]); 664 kfree(country_ie); 665 } 666 667 void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 668 const u8 *req_ie, size_t req_ie_len, 669 const u8 *resp_ie, size_t resp_ie_len, 670 u16 status, gfp_t gfp) 671 { 672 struct wireless_dev *wdev = dev->ieee80211_ptr; 673 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 674 struct cfg80211_event *ev; 675 unsigned long flags; 676 677 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 678 if (!ev) 679 return; 680 681 ev->type = EVENT_CONNECT_RESULT; 682 if (bssid) 683 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 684 if (req_ie_len) { 685 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 686 ev->cr.req_ie_len = req_ie_len; 687 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 688 } 689 if (resp_ie_len) { 690 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 691 ev->cr.resp_ie_len = resp_ie_len; 692 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 693 } 694 ev->cr.status = status; 695 696 spin_lock_irqsave(&wdev->event_lock, flags); 697 list_add_tail(&ev->list, &wdev->event_list); 698 spin_unlock_irqrestore(&wdev->event_lock, flags); 699 queue_work(cfg80211_wq, &rdev->event_work); 700 } 701 EXPORT_SYMBOL(cfg80211_connect_result); 702 703 /* Consumes bss object one way or another */ 704 void __cfg80211_roamed(struct wireless_dev *wdev, 705 struct cfg80211_bss *bss, 706 const u8 *req_ie, size_t req_ie_len, 707 const u8 *resp_ie, size_t resp_ie_len) 708 { 709 #ifdef CONFIG_CFG80211_WEXT 710 union iwreq_data wrqu; 711 #endif 712 ASSERT_WDEV_LOCK(wdev); 713 714 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 715 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 716 goto out; 717 718 if (WARN_ON(!wdev->current_bss)) 719 goto out; 720 721 cfg80211_unhold_bss(wdev->current_bss); 722 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 723 wdev->current_bss = NULL; 724 725 cfg80211_hold_bss(bss_from_pub(bss)); 726 wdev->current_bss = bss_from_pub(bss); 727 728 nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bss->bssid, 729 req_ie, req_ie_len, resp_ie, resp_ie_len, 730 GFP_KERNEL); 731 732 #ifdef CONFIG_CFG80211_WEXT 733 if (req_ie) { 734 memset(&wrqu, 0, sizeof(wrqu)); 735 wrqu.data.length = req_ie_len; 736 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 737 &wrqu, req_ie); 738 } 739 740 if (resp_ie) { 741 memset(&wrqu, 0, sizeof(wrqu)); 742 wrqu.data.length = resp_ie_len; 743 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 744 &wrqu, resp_ie); 745 } 746 747 memset(&wrqu, 0, sizeof(wrqu)); 748 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 749 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 750 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 751 wdev->wext.prev_bssid_valid = true; 752 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 753 #endif 754 755 return; 756 out: 757 cfg80211_put_bss(wdev->wiphy, bss); 758 } 759 760 void cfg80211_roamed(struct net_device *dev, 761 struct ieee80211_channel *channel, 762 const u8 *bssid, 763 const u8 *req_ie, size_t req_ie_len, 764 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 765 { 766 struct wireless_dev *wdev = dev->ieee80211_ptr; 767 struct cfg80211_bss *bss; 768 769 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 770 wdev->ssid_len, WLAN_CAPABILITY_ESS, 771 WLAN_CAPABILITY_ESS); 772 if (WARN_ON(!bss)) 773 return; 774 775 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 776 resp_ie_len, gfp); 777 } 778 EXPORT_SYMBOL(cfg80211_roamed); 779 780 /* Consumes bss object one way or another */ 781 void cfg80211_roamed_bss(struct net_device *dev, 782 struct cfg80211_bss *bss, const u8 *req_ie, 783 size_t req_ie_len, const u8 *resp_ie, 784 size_t resp_ie_len, gfp_t gfp) 785 { 786 struct wireless_dev *wdev = dev->ieee80211_ptr; 787 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 788 struct cfg80211_event *ev; 789 unsigned long flags; 790 791 if (WARN_ON(!bss)) 792 return; 793 794 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 795 if (!ev) { 796 cfg80211_put_bss(wdev->wiphy, bss); 797 return; 798 } 799 800 ev->type = EVENT_ROAMED; 801 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 802 ev->rm.req_ie_len = req_ie_len; 803 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 804 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 805 ev->rm.resp_ie_len = resp_ie_len; 806 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 807 ev->rm.bss = bss; 808 809 spin_lock_irqsave(&wdev->event_lock, flags); 810 list_add_tail(&ev->list, &wdev->event_list); 811 spin_unlock_irqrestore(&wdev->event_lock, flags); 812 queue_work(cfg80211_wq, &rdev->event_work); 813 } 814 EXPORT_SYMBOL(cfg80211_roamed_bss); 815 816 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 817 size_t ie_len, u16 reason, bool from_ap) 818 { 819 struct wireless_dev *wdev = dev->ieee80211_ptr; 820 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 821 int i; 822 #ifdef CONFIG_CFG80211_WEXT 823 union iwreq_data wrqu; 824 #endif 825 826 ASSERT_WDEV_LOCK(wdev); 827 828 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 829 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 830 return; 831 832 if (wdev->current_bss) { 833 cfg80211_unhold_bss(wdev->current_bss); 834 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 835 } 836 837 wdev->current_bss = NULL; 838 wdev->ssid_len = 0; 839 840 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 841 842 /* 843 * Delete all the keys ... pairwise keys can't really 844 * exist any more anyway, but default keys might. 845 */ 846 if (rdev->ops->del_key) 847 for (i = 0; i < 6; i++) 848 rdev_del_key(rdev, dev, i, false, NULL); 849 850 #ifdef CONFIG_CFG80211_WEXT 851 memset(&wrqu, 0, sizeof(wrqu)); 852 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 853 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 854 wdev->wext.connect.ssid_len = 0; 855 #endif 856 857 schedule_work(&cfg80211_disconnect_work); 858 } 859 860 void cfg80211_disconnected(struct net_device *dev, u16 reason, 861 u8 *ie, size_t ie_len, gfp_t gfp) 862 { 863 struct wireless_dev *wdev = dev->ieee80211_ptr; 864 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 865 struct cfg80211_event *ev; 866 unsigned long flags; 867 868 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 869 if (!ev) 870 return; 871 872 ev->type = EVENT_DISCONNECTED; 873 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 874 ev->dc.ie_len = ie_len; 875 memcpy((void *)ev->dc.ie, ie, ie_len); 876 ev->dc.reason = reason; 877 878 spin_lock_irqsave(&wdev->event_lock, flags); 879 list_add_tail(&ev->list, &wdev->event_list); 880 spin_unlock_irqrestore(&wdev->event_lock, flags); 881 queue_work(cfg80211_wq, &rdev->event_work); 882 } 883 EXPORT_SYMBOL(cfg80211_disconnected); 884 885 /* 886 * API calls for nl80211/wext compatibility code 887 */ 888 int cfg80211_connect(struct cfg80211_registered_device *rdev, 889 struct net_device *dev, 890 struct cfg80211_connect_params *connect, 891 struct cfg80211_cached_keys *connkeys, 892 const u8 *prev_bssid) 893 { 894 struct wireless_dev *wdev = dev->ieee80211_ptr; 895 int err; 896 897 ASSERT_WDEV_LOCK(wdev); 898 899 if (WARN_ON(wdev->connect_keys)) { 900 kfree(wdev->connect_keys); 901 wdev->connect_keys = NULL; 902 } 903 904 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 905 rdev->wiphy.ht_capa_mod_mask); 906 907 if (connkeys && connkeys->def >= 0) { 908 int idx; 909 u32 cipher; 910 911 idx = connkeys->def; 912 cipher = connkeys->params[idx].cipher; 913 /* If given a WEP key we may need it for shared key auth */ 914 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 915 cipher == WLAN_CIPHER_SUITE_WEP104) { 916 connect->key_idx = idx; 917 connect->key = connkeys->params[idx].key; 918 connect->key_len = connkeys->params[idx].key_len; 919 920 /* 921 * If ciphers are not set (e.g. when going through 922 * iwconfig), we have to set them appropriately here. 923 */ 924 if (connect->crypto.cipher_group == 0) 925 connect->crypto.cipher_group = cipher; 926 927 if (connect->crypto.n_ciphers_pairwise == 0) { 928 connect->crypto.n_ciphers_pairwise = 1; 929 connect->crypto.ciphers_pairwise[0] = cipher; 930 } 931 } 932 } 933 934 wdev->connect_keys = connkeys; 935 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 936 wdev->ssid_len = connect->ssid_len; 937 938 if (!rdev->ops->connect) 939 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 940 else 941 err = rdev_connect(rdev, dev, connect); 942 943 if (err) { 944 wdev->connect_keys = NULL; 945 wdev->ssid_len = 0; 946 return err; 947 } 948 949 return 0; 950 } 951 952 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 953 struct net_device *dev, u16 reason, bool wextev) 954 { 955 struct wireless_dev *wdev = dev->ieee80211_ptr; 956 int err; 957 958 ASSERT_WDEV_LOCK(wdev); 959 960 kfree(wdev->connect_keys); 961 wdev->connect_keys = NULL; 962 963 if (wdev->conn) { 964 err = cfg80211_sme_disconnect(wdev, reason); 965 } else if (!rdev->ops->disconnect) { 966 cfg80211_mlme_down(rdev, dev); 967 err = 0; 968 } else { 969 err = rdev_disconnect(rdev, dev, reason); 970 } 971 972 return err; 973 } 974