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 nl80211_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 nl80211_band band; 97 struct ieee80211_supported_band *bands; 98 struct ieee80211_channel *channel; 99 100 for (band = 0; band < NUM_NL80211_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 eth_broadcast_addr(request->bssid); 123 124 request->wdev = wdev; 125 request->wiphy = &rdev->wiphy; 126 request->scan_start = jiffies; 127 128 rdev->scan_req = request; 129 130 err = rdev_scan(rdev, request); 131 if (!err) { 132 wdev->conn->state = CFG80211_CONN_SCANNING; 133 nl80211_send_scan_start(rdev, wdev); 134 dev_hold(wdev->netdev); 135 } else { 136 rdev->scan_req = NULL; 137 kfree(request); 138 } 139 return err; 140 } 141 142 static int cfg80211_conn_do_work(struct wireless_dev *wdev) 143 { 144 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 145 struct cfg80211_connect_params *params; 146 struct cfg80211_assoc_request req = {}; 147 int err; 148 149 ASSERT_WDEV_LOCK(wdev); 150 151 if (!wdev->conn) 152 return 0; 153 154 params = &wdev->conn->params; 155 156 switch (wdev->conn->state) { 157 case CFG80211_CONN_SCANNING: 158 /* didn't find it during scan ... */ 159 return -ENOENT; 160 case CFG80211_CONN_SCAN_AGAIN: 161 return cfg80211_conn_scan(wdev); 162 case CFG80211_CONN_AUTHENTICATE_NEXT: 163 if (WARN_ON(!rdev->ops->auth)) 164 return -EOPNOTSUPP; 165 wdev->conn->state = CFG80211_CONN_AUTHENTICATING; 166 return cfg80211_mlme_auth(rdev, wdev->netdev, 167 params->channel, params->auth_type, 168 params->bssid, 169 params->ssid, params->ssid_len, 170 NULL, 0, 171 params->key, params->key_len, 172 params->key_idx, NULL, 0); 173 case CFG80211_CONN_AUTH_FAILED: 174 return -ENOTCONN; 175 case CFG80211_CONN_ASSOCIATE_NEXT: 176 if (WARN_ON(!rdev->ops->assoc)) 177 return -EOPNOTSUPP; 178 wdev->conn->state = CFG80211_CONN_ASSOCIATING; 179 if (wdev->conn->prev_bssid_valid) 180 req.prev_bssid = wdev->conn->prev_bssid; 181 req.ie = params->ie; 182 req.ie_len = params->ie_len; 183 req.use_mfp = params->mfp != NL80211_MFP_NO; 184 req.crypto = params->crypto; 185 req.flags = params->flags; 186 req.ht_capa = params->ht_capa; 187 req.ht_capa_mask = params->ht_capa_mask; 188 req.vht_capa = params->vht_capa; 189 req.vht_capa_mask = params->vht_capa_mask; 190 191 err = cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, 192 params->bssid, params->ssid, 193 params->ssid_len, &req); 194 if (err) 195 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 196 NULL, 0, 197 WLAN_REASON_DEAUTH_LEAVING, 198 false); 199 return err; 200 case CFG80211_CONN_ASSOC_FAILED: 201 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 202 NULL, 0, 203 WLAN_REASON_DEAUTH_LEAVING, false); 204 return -ENOTCONN; 205 case CFG80211_CONN_DEAUTH: 206 cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, 207 NULL, 0, 208 WLAN_REASON_DEAUTH_LEAVING, false); 209 /* free directly, disconnected event already sent */ 210 cfg80211_sme_free(wdev); 211 return 0; 212 default: 213 return 0; 214 } 215 } 216 217 void cfg80211_conn_work(struct work_struct *work) 218 { 219 struct cfg80211_registered_device *rdev = 220 container_of(work, struct cfg80211_registered_device, conn_work); 221 struct wireless_dev *wdev; 222 u8 bssid_buf[ETH_ALEN], *bssid = NULL; 223 224 rtnl_lock(); 225 226 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 227 if (!wdev->netdev) 228 continue; 229 230 wdev_lock(wdev); 231 if (!netif_running(wdev->netdev)) { 232 wdev_unlock(wdev); 233 continue; 234 } 235 if (!wdev->conn || 236 wdev->conn->state == CFG80211_CONN_CONNECTED) { 237 wdev_unlock(wdev); 238 continue; 239 } 240 if (wdev->conn->params.bssid) { 241 memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); 242 bssid = bssid_buf; 243 } 244 if (cfg80211_conn_do_work(wdev)) { 245 __cfg80211_connect_result( 246 wdev->netdev, bssid, 247 NULL, 0, NULL, 0, 248 WLAN_STATUS_UNSPECIFIED_FAILURE, 249 false, NULL); 250 } 251 wdev_unlock(wdev); 252 } 253 254 rtnl_unlock(); 255 } 256 257 /* Returned bss is reference counted and must be cleaned up appropriately. */ 258 static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) 259 { 260 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 261 struct cfg80211_bss *bss; 262 263 ASSERT_WDEV_LOCK(wdev); 264 265 bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, 266 wdev->conn->params.bssid, 267 wdev->conn->params.ssid, 268 wdev->conn->params.ssid_len, 269 wdev->conn_bss_type, 270 IEEE80211_PRIVACY(wdev->conn->params.privacy)); 271 if (!bss) 272 return NULL; 273 274 memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); 275 wdev->conn->params.bssid = wdev->conn->bssid; 276 wdev->conn->params.channel = bss->channel; 277 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 278 schedule_work(&rdev->conn_work); 279 280 return bss; 281 } 282 283 static void __cfg80211_sme_scan_done(struct net_device *dev) 284 { 285 struct wireless_dev *wdev = dev->ieee80211_ptr; 286 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 287 struct cfg80211_bss *bss; 288 289 ASSERT_WDEV_LOCK(wdev); 290 291 if (!wdev->conn) 292 return; 293 294 if (wdev->conn->state != CFG80211_CONN_SCANNING && 295 wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) 296 return; 297 298 bss = cfg80211_get_conn_bss(wdev); 299 if (bss) 300 cfg80211_put_bss(&rdev->wiphy, bss); 301 else 302 schedule_work(&rdev->conn_work); 303 } 304 305 void cfg80211_sme_scan_done(struct net_device *dev) 306 { 307 struct wireless_dev *wdev = dev->ieee80211_ptr; 308 309 wdev_lock(wdev); 310 __cfg80211_sme_scan_done(dev); 311 wdev_unlock(wdev); 312 } 313 314 void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) 315 { 316 struct wiphy *wiphy = wdev->wiphy; 317 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); 318 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; 319 u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); 320 321 ASSERT_WDEV_LOCK(wdev); 322 323 if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) 324 return; 325 326 if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && 327 wdev->conn->auto_auth && 328 wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { 329 /* select automatically between only open, shared, leap */ 330 switch (wdev->conn->params.auth_type) { 331 case NL80211_AUTHTYPE_OPEN_SYSTEM: 332 if (wdev->connect_keys) 333 wdev->conn->params.auth_type = 334 NL80211_AUTHTYPE_SHARED_KEY; 335 else 336 wdev->conn->params.auth_type = 337 NL80211_AUTHTYPE_NETWORK_EAP; 338 break; 339 case NL80211_AUTHTYPE_SHARED_KEY: 340 wdev->conn->params.auth_type = 341 NL80211_AUTHTYPE_NETWORK_EAP; 342 break; 343 default: 344 /* huh? */ 345 wdev->conn->params.auth_type = 346 NL80211_AUTHTYPE_OPEN_SYSTEM; 347 break; 348 } 349 wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 350 schedule_work(&rdev->conn_work); 351 } else if (status_code != WLAN_STATUS_SUCCESS) { 352 __cfg80211_connect_result(wdev->netdev, mgmt->bssid, 353 NULL, 0, NULL, 0, 354 status_code, false, NULL); 355 } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { 356 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 357 schedule_work(&rdev->conn_work); 358 } 359 } 360 361 bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) 362 { 363 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 364 365 if (!wdev->conn) 366 return false; 367 368 if (status == WLAN_STATUS_SUCCESS) { 369 wdev->conn->state = CFG80211_CONN_CONNECTED; 370 return false; 371 } 372 373 if (wdev->conn->prev_bssid_valid) { 374 /* 375 * Some stupid APs don't accept reassoc, so we 376 * need to fall back to trying regular assoc; 377 * return true so no event is sent to userspace. 378 */ 379 wdev->conn->prev_bssid_valid = false; 380 wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; 381 schedule_work(&rdev->conn_work); 382 return true; 383 } 384 385 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 386 schedule_work(&rdev->conn_work); 387 return false; 388 } 389 390 void cfg80211_sme_deauth(struct wireless_dev *wdev) 391 { 392 cfg80211_sme_free(wdev); 393 } 394 395 void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) 396 { 397 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 398 399 if (!wdev->conn) 400 return; 401 402 wdev->conn->state = CFG80211_CONN_AUTH_FAILED; 403 schedule_work(&rdev->conn_work); 404 } 405 406 void cfg80211_sme_disassoc(struct wireless_dev *wdev) 407 { 408 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 409 410 if (!wdev->conn) 411 return; 412 413 wdev->conn->state = CFG80211_CONN_DEAUTH; 414 schedule_work(&rdev->conn_work); 415 } 416 417 void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) 418 { 419 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 420 421 if (!wdev->conn) 422 return; 423 424 wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; 425 schedule_work(&rdev->conn_work); 426 } 427 428 static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, 429 const u8 *ies, size_t ies_len, 430 const u8 **out_ies, size_t *out_ies_len) 431 { 432 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 433 u8 *buf; 434 size_t offs; 435 436 if (!rdev->wiphy.extended_capabilities_len || 437 (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { 438 *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); 439 if (!*out_ies) 440 return -ENOMEM; 441 *out_ies_len = ies_len; 442 return 0; 443 } 444 445 buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, 446 GFP_KERNEL); 447 if (!buf) 448 return -ENOMEM; 449 450 if (ies_len) { 451 static const u8 before_extcapa[] = { 452 /* not listing IEs expected to be created by driver */ 453 WLAN_EID_RSN, 454 WLAN_EID_QOS_CAPA, 455 WLAN_EID_RRM_ENABLED_CAPABILITIES, 456 WLAN_EID_MOBILITY_DOMAIN, 457 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 458 WLAN_EID_BSS_COEX_2040, 459 }; 460 461 offs = ieee80211_ie_split(ies, ies_len, before_extcapa, 462 ARRAY_SIZE(before_extcapa), 0); 463 memcpy(buf, ies, offs); 464 /* leave a whole for extended capabilities IE */ 465 memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, 466 ies + offs, ies_len - offs); 467 } else { 468 offs = 0; 469 } 470 471 /* place extended capabilities IE (with only driver capabilities) */ 472 buf[offs] = WLAN_EID_EXT_CAPABILITY; 473 buf[offs + 1] = rdev->wiphy.extended_capabilities_len; 474 memcpy(buf + offs + 2, 475 rdev->wiphy.extended_capabilities, 476 rdev->wiphy.extended_capabilities_len); 477 478 *out_ies = buf; 479 *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; 480 481 return 0; 482 } 483 484 static int cfg80211_sme_connect(struct wireless_dev *wdev, 485 struct cfg80211_connect_params *connect, 486 const u8 *prev_bssid) 487 { 488 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 489 struct cfg80211_bss *bss; 490 int err; 491 492 if (!rdev->ops->auth || !rdev->ops->assoc) 493 return -EOPNOTSUPP; 494 495 if (wdev->current_bss) { 496 if (!prev_bssid) 497 return -EALREADY; 498 if (prev_bssid && 499 !ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid)) 500 return -ENOTCONN; 501 cfg80211_unhold_bss(wdev->current_bss); 502 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 503 wdev->current_bss = NULL; 504 505 cfg80211_sme_free(wdev); 506 } 507 508 if (WARN_ON(wdev->conn)) 509 return -EINPROGRESS; 510 511 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 512 if (!wdev->conn) 513 return -ENOMEM; 514 515 /* 516 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 517 */ 518 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 519 if (connect->bssid) { 520 wdev->conn->params.bssid = wdev->conn->bssid; 521 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 522 } 523 524 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 525 &wdev->conn->ie, 526 &wdev->conn->params.ie_len)) { 527 kfree(wdev->conn); 528 wdev->conn = NULL; 529 return -ENOMEM; 530 } 531 wdev->conn->params.ie = wdev->conn->ie; 532 533 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 534 wdev->conn->auto_auth = true; 535 /* start with open system ... should mostly work */ 536 wdev->conn->params.auth_type = 537 NL80211_AUTHTYPE_OPEN_SYSTEM; 538 } else { 539 wdev->conn->auto_auth = false; 540 } 541 542 wdev->conn->params.ssid = wdev->ssid; 543 wdev->conn->params.ssid_len = wdev->ssid_len; 544 545 /* see if we have the bss already */ 546 bss = cfg80211_get_conn_bss(wdev); 547 548 if (prev_bssid) { 549 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 550 wdev->conn->prev_bssid_valid = true; 551 } 552 553 /* we're good if we have a matching bss struct */ 554 if (bss) { 555 err = cfg80211_conn_do_work(wdev); 556 cfg80211_put_bss(wdev->wiphy, bss); 557 } else { 558 /* otherwise we'll need to scan for the AP first */ 559 err = cfg80211_conn_scan(wdev); 560 561 /* 562 * If we can't scan right now, then we need to scan again 563 * after the current scan finished, since the parameters 564 * changed (unless we find a good AP anyway). 565 */ 566 if (err == -EBUSY) { 567 err = 0; 568 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 569 } 570 } 571 572 if (err) 573 cfg80211_sme_free(wdev); 574 575 return err; 576 } 577 578 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 579 { 580 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 581 int err; 582 583 if (!wdev->conn) 584 return 0; 585 586 if (!rdev->ops->deauth) 587 return -EOPNOTSUPP; 588 589 if (wdev->conn->state == CFG80211_CONN_SCANNING || 590 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 591 err = 0; 592 goto out; 593 } 594 595 /* wdev->conn->params.bssid must be set if > SCANNING */ 596 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 597 wdev->conn->params.bssid, 598 NULL, 0, reason, false); 599 out: 600 cfg80211_sme_free(wdev); 601 return err; 602 } 603 604 /* 605 * code shared for in-device and software SME 606 */ 607 608 static bool cfg80211_is_all_idle(void) 609 { 610 struct cfg80211_registered_device *rdev; 611 struct wireless_dev *wdev; 612 bool is_all_idle = true; 613 614 /* 615 * All devices must be idle as otherwise if you are actively 616 * scanning some new beacon hints could be learned and would 617 * count as new regulatory hints. 618 */ 619 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 620 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 621 wdev_lock(wdev); 622 if (wdev->conn || wdev->current_bss) 623 is_all_idle = false; 624 wdev_unlock(wdev); 625 } 626 } 627 628 return is_all_idle; 629 } 630 631 static void disconnect_work(struct work_struct *work) 632 { 633 rtnl_lock(); 634 if (cfg80211_is_all_idle()) 635 regulatory_hint_disconnect(); 636 rtnl_unlock(); 637 } 638 639 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 640 641 642 /* 643 * API calls for drivers implementing connect/disconnect and 644 * SME event handling 645 */ 646 647 /* This method must consume bss one way or another */ 648 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 649 const u8 *req_ie, size_t req_ie_len, 650 const u8 *resp_ie, size_t resp_ie_len, 651 u16 status, bool wextev, 652 struct cfg80211_bss *bss) 653 { 654 struct wireless_dev *wdev = dev->ieee80211_ptr; 655 const u8 *country_ie; 656 #ifdef CONFIG_CFG80211_WEXT 657 union iwreq_data wrqu; 658 #endif 659 660 ASSERT_WDEV_LOCK(wdev); 661 662 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 663 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 664 cfg80211_put_bss(wdev->wiphy, bss); 665 return; 666 } 667 668 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, 669 bssid, req_ie, req_ie_len, 670 resp_ie, resp_ie_len, 671 status, GFP_KERNEL); 672 673 #ifdef CONFIG_CFG80211_WEXT 674 if (wextev) { 675 if (req_ie && status == WLAN_STATUS_SUCCESS) { 676 memset(&wrqu, 0, sizeof(wrqu)); 677 wrqu.data.length = req_ie_len; 678 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 679 } 680 681 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 682 memset(&wrqu, 0, sizeof(wrqu)); 683 wrqu.data.length = resp_ie_len; 684 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 685 } 686 687 memset(&wrqu, 0, sizeof(wrqu)); 688 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 689 if (bssid && status == WLAN_STATUS_SUCCESS) { 690 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 691 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 692 wdev->wext.prev_bssid_valid = true; 693 } 694 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 695 } 696 #endif 697 698 if (!bss && (status == WLAN_STATUS_SUCCESS)) { 699 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 700 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, 701 wdev->ssid, wdev->ssid_len, 702 wdev->conn_bss_type, 703 IEEE80211_PRIVACY_ANY); 704 if (bss) 705 cfg80211_hold_bss(bss_from_pub(bss)); 706 } 707 708 if (wdev->current_bss) { 709 cfg80211_unhold_bss(wdev->current_bss); 710 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 711 wdev->current_bss = NULL; 712 } 713 714 if (status != WLAN_STATUS_SUCCESS) { 715 kzfree(wdev->connect_keys); 716 wdev->connect_keys = NULL; 717 wdev->ssid_len = 0; 718 if (bss) { 719 cfg80211_unhold_bss(bss_from_pub(bss)); 720 cfg80211_put_bss(wdev->wiphy, bss); 721 } 722 cfg80211_sme_free(wdev); 723 return; 724 } 725 726 if (WARN_ON(!bss)) 727 return; 728 729 wdev->current_bss = bss_from_pub(bss); 730 731 cfg80211_upload_connect_keys(wdev); 732 733 rcu_read_lock(); 734 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 735 if (!country_ie) { 736 rcu_read_unlock(); 737 return; 738 } 739 740 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 741 rcu_read_unlock(); 742 743 if (!country_ie) 744 return; 745 746 /* 747 * ieee80211_bss_get_ie() ensures we can access: 748 * - country_ie + 2, the start of the country ie data, and 749 * - and country_ie[1] which is the IE length 750 */ 751 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band, 752 country_ie + 2, country_ie[1]); 753 kfree(country_ie); 754 } 755 756 /* Consumes bss object one way or another */ 757 void cfg80211_connect_bss(struct net_device *dev, const u8 *bssid, 758 struct cfg80211_bss *bss, const u8 *req_ie, 759 size_t req_ie_len, const u8 *resp_ie, 760 size_t resp_ie_len, u16 status, gfp_t gfp) 761 { 762 struct wireless_dev *wdev = dev->ieee80211_ptr; 763 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 764 struct cfg80211_event *ev; 765 unsigned long flags; 766 767 if (bss) { 768 /* Make sure the bss entry provided by the driver is valid. */ 769 struct cfg80211_internal_bss *ibss = bss_from_pub(bss); 770 771 if (WARN_ON(list_empty(&ibss->list))) { 772 cfg80211_put_bss(wdev->wiphy, bss); 773 return; 774 } 775 } 776 777 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 778 if (!ev) { 779 cfg80211_put_bss(wdev->wiphy, bss); 780 return; 781 } 782 783 ev->type = EVENT_CONNECT_RESULT; 784 if (bssid) 785 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 786 if (req_ie_len) { 787 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 788 ev->cr.req_ie_len = req_ie_len; 789 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 790 } 791 if (resp_ie_len) { 792 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 793 ev->cr.resp_ie_len = resp_ie_len; 794 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 795 } 796 if (bss) 797 cfg80211_hold_bss(bss_from_pub(bss)); 798 ev->cr.bss = bss; 799 ev->cr.status = status; 800 801 spin_lock_irqsave(&wdev->event_lock, flags); 802 list_add_tail(&ev->list, &wdev->event_list); 803 spin_unlock_irqrestore(&wdev->event_lock, flags); 804 queue_work(cfg80211_wq, &rdev->event_work); 805 } 806 EXPORT_SYMBOL(cfg80211_connect_bss); 807 808 /* Consumes bss object one way or another */ 809 void __cfg80211_roamed(struct wireless_dev *wdev, 810 struct cfg80211_bss *bss, 811 const u8 *req_ie, size_t req_ie_len, 812 const u8 *resp_ie, size_t resp_ie_len) 813 { 814 #ifdef CONFIG_CFG80211_WEXT 815 union iwreq_data wrqu; 816 #endif 817 ASSERT_WDEV_LOCK(wdev); 818 819 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 820 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 821 goto out; 822 823 if (WARN_ON(!wdev->current_bss)) 824 goto out; 825 826 cfg80211_unhold_bss(wdev->current_bss); 827 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 828 wdev->current_bss = NULL; 829 830 cfg80211_hold_bss(bss_from_pub(bss)); 831 wdev->current_bss = bss_from_pub(bss); 832 833 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 834 wdev->netdev, bss->bssid, 835 req_ie, req_ie_len, resp_ie, resp_ie_len, 836 GFP_KERNEL); 837 838 #ifdef CONFIG_CFG80211_WEXT 839 if (req_ie) { 840 memset(&wrqu, 0, sizeof(wrqu)); 841 wrqu.data.length = req_ie_len; 842 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 843 &wrqu, req_ie); 844 } 845 846 if (resp_ie) { 847 memset(&wrqu, 0, sizeof(wrqu)); 848 wrqu.data.length = resp_ie_len; 849 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 850 &wrqu, resp_ie); 851 } 852 853 memset(&wrqu, 0, sizeof(wrqu)); 854 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 855 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 856 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 857 wdev->wext.prev_bssid_valid = true; 858 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 859 #endif 860 861 return; 862 out: 863 cfg80211_put_bss(wdev->wiphy, bss); 864 } 865 866 void cfg80211_roamed(struct net_device *dev, 867 struct ieee80211_channel *channel, 868 const u8 *bssid, 869 const u8 *req_ie, size_t req_ie_len, 870 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 871 { 872 struct wireless_dev *wdev = dev->ieee80211_ptr; 873 struct cfg80211_bss *bss; 874 875 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 876 wdev->ssid_len, 877 wdev->conn_bss_type, IEEE80211_PRIVACY_ANY); 878 if (WARN_ON(!bss)) 879 return; 880 881 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 882 resp_ie_len, gfp); 883 } 884 EXPORT_SYMBOL(cfg80211_roamed); 885 886 /* Consumes bss object one way or another */ 887 void cfg80211_roamed_bss(struct net_device *dev, 888 struct cfg80211_bss *bss, const u8 *req_ie, 889 size_t req_ie_len, const u8 *resp_ie, 890 size_t resp_ie_len, gfp_t gfp) 891 { 892 struct wireless_dev *wdev = dev->ieee80211_ptr; 893 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 894 struct cfg80211_event *ev; 895 unsigned long flags; 896 897 if (WARN_ON(!bss)) 898 return; 899 900 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 901 if (!ev) { 902 cfg80211_put_bss(wdev->wiphy, bss); 903 return; 904 } 905 906 ev->type = EVENT_ROAMED; 907 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 908 ev->rm.req_ie_len = req_ie_len; 909 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 910 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 911 ev->rm.resp_ie_len = resp_ie_len; 912 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 913 ev->rm.bss = bss; 914 915 spin_lock_irqsave(&wdev->event_lock, flags); 916 list_add_tail(&ev->list, &wdev->event_list); 917 spin_unlock_irqrestore(&wdev->event_lock, flags); 918 queue_work(cfg80211_wq, &rdev->event_work); 919 } 920 EXPORT_SYMBOL(cfg80211_roamed_bss); 921 922 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 923 size_t ie_len, u16 reason, bool from_ap) 924 { 925 struct wireless_dev *wdev = dev->ieee80211_ptr; 926 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 927 int i; 928 #ifdef CONFIG_CFG80211_WEXT 929 union iwreq_data wrqu; 930 #endif 931 932 ASSERT_WDEV_LOCK(wdev); 933 934 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 935 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 936 return; 937 938 if (wdev->current_bss) { 939 cfg80211_unhold_bss(wdev->current_bss); 940 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 941 } 942 943 wdev->current_bss = NULL; 944 wdev->ssid_len = 0; 945 946 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 947 948 /* stop critical protocol if supported */ 949 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 950 rdev->crit_proto_nlportid = 0; 951 rdev_crit_proto_stop(rdev, wdev); 952 } 953 954 /* 955 * Delete all the keys ... pairwise keys can't really 956 * exist any more anyway, but default keys might. 957 */ 958 if (rdev->ops->del_key) 959 for (i = 0; i < 6; i++) 960 rdev_del_key(rdev, dev, i, false, NULL); 961 962 rdev_set_qos_map(rdev, dev, NULL); 963 964 #ifdef CONFIG_CFG80211_WEXT 965 memset(&wrqu, 0, sizeof(wrqu)); 966 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 967 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 968 wdev->wext.connect.ssid_len = 0; 969 #endif 970 971 schedule_work(&cfg80211_disconnect_work); 972 } 973 974 void cfg80211_disconnected(struct net_device *dev, u16 reason, 975 const u8 *ie, size_t ie_len, 976 bool locally_generated, gfp_t gfp) 977 { 978 struct wireless_dev *wdev = dev->ieee80211_ptr; 979 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 980 struct cfg80211_event *ev; 981 unsigned long flags; 982 983 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 984 if (!ev) 985 return; 986 987 ev->type = EVENT_DISCONNECTED; 988 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 989 ev->dc.ie_len = ie_len; 990 memcpy((void *)ev->dc.ie, ie, ie_len); 991 ev->dc.reason = reason; 992 ev->dc.locally_generated = locally_generated; 993 994 spin_lock_irqsave(&wdev->event_lock, flags); 995 list_add_tail(&ev->list, &wdev->event_list); 996 spin_unlock_irqrestore(&wdev->event_lock, flags); 997 queue_work(cfg80211_wq, &rdev->event_work); 998 } 999 EXPORT_SYMBOL(cfg80211_disconnected); 1000 1001 /* 1002 * API calls for nl80211/wext compatibility code 1003 */ 1004 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1005 struct net_device *dev, 1006 struct cfg80211_connect_params *connect, 1007 struct cfg80211_cached_keys *connkeys, 1008 const u8 *prev_bssid) 1009 { 1010 struct wireless_dev *wdev = dev->ieee80211_ptr; 1011 int err; 1012 1013 ASSERT_WDEV_LOCK(wdev); 1014 1015 if (WARN_ON(wdev->connect_keys)) { 1016 kzfree(wdev->connect_keys); 1017 wdev->connect_keys = NULL; 1018 } 1019 1020 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1021 rdev->wiphy.ht_capa_mod_mask); 1022 1023 if (connkeys && connkeys->def >= 0) { 1024 int idx; 1025 u32 cipher; 1026 1027 idx = connkeys->def; 1028 cipher = connkeys->params[idx].cipher; 1029 /* If given a WEP key we may need it for shared key auth */ 1030 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1031 cipher == WLAN_CIPHER_SUITE_WEP104) { 1032 connect->key_idx = idx; 1033 connect->key = connkeys->params[idx].key; 1034 connect->key_len = connkeys->params[idx].key_len; 1035 1036 /* 1037 * If ciphers are not set (e.g. when going through 1038 * iwconfig), we have to set them appropriately here. 1039 */ 1040 if (connect->crypto.cipher_group == 0) 1041 connect->crypto.cipher_group = cipher; 1042 1043 if (connect->crypto.n_ciphers_pairwise == 0) { 1044 connect->crypto.n_ciphers_pairwise = 1; 1045 connect->crypto.ciphers_pairwise[0] = cipher; 1046 } 1047 } 1048 } 1049 1050 wdev->connect_keys = connkeys; 1051 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 1052 wdev->ssid_len = connect->ssid_len; 1053 1054 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1055 IEEE80211_BSS_TYPE_ESS; 1056 1057 if (!rdev->ops->connect) 1058 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1059 else 1060 err = rdev_connect(rdev, dev, connect); 1061 1062 if (err) { 1063 wdev->connect_keys = NULL; 1064 wdev->ssid_len = 0; 1065 return err; 1066 } 1067 1068 return 0; 1069 } 1070 1071 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1072 struct net_device *dev, u16 reason, bool wextev) 1073 { 1074 struct wireless_dev *wdev = dev->ieee80211_ptr; 1075 int err = 0; 1076 1077 ASSERT_WDEV_LOCK(wdev); 1078 1079 kzfree(wdev->connect_keys); 1080 wdev->connect_keys = NULL; 1081 1082 if (wdev->conn) 1083 err = cfg80211_sme_disconnect(wdev, reason); 1084 else if (!rdev->ops->disconnect) 1085 cfg80211_mlme_down(rdev, dev); 1086 else if (wdev->current_bss) 1087 err = rdev_disconnect(rdev, dev, reason); 1088 1089 return err; 1090 } 1091