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, -1, 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 if (!prev_bssid) 495 return -EALREADY; 496 if (prev_bssid && 497 !ether_addr_equal(prev_bssid, wdev->current_bss->pub.bssid)) 498 return -ENOTCONN; 499 cfg80211_unhold_bss(wdev->current_bss); 500 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 501 wdev->current_bss = NULL; 502 503 cfg80211_sme_free(wdev); 504 } 505 506 if (WARN_ON(wdev->conn)) 507 return -EINPROGRESS; 508 509 wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); 510 if (!wdev->conn) 511 return -ENOMEM; 512 513 /* 514 * Copy all parameters, and treat explicitly IEs, BSSID, SSID. 515 */ 516 memcpy(&wdev->conn->params, connect, sizeof(*connect)); 517 if (connect->bssid) { 518 wdev->conn->params.bssid = wdev->conn->bssid; 519 memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); 520 } 521 522 if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, 523 &wdev->conn->ie, 524 &wdev->conn->params.ie_len)) { 525 kfree(wdev->conn); 526 wdev->conn = NULL; 527 return -ENOMEM; 528 } 529 wdev->conn->params.ie = wdev->conn->ie; 530 531 if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { 532 wdev->conn->auto_auth = true; 533 /* start with open system ... should mostly work */ 534 wdev->conn->params.auth_type = 535 NL80211_AUTHTYPE_OPEN_SYSTEM; 536 } else { 537 wdev->conn->auto_auth = false; 538 } 539 540 wdev->conn->params.ssid = wdev->ssid; 541 wdev->conn->params.ssid_len = wdev->ssid_len; 542 543 /* see if we have the bss already */ 544 bss = cfg80211_get_conn_bss(wdev); 545 546 if (prev_bssid) { 547 memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); 548 wdev->conn->prev_bssid_valid = true; 549 } 550 551 /* we're good if we have a matching bss struct */ 552 if (bss) { 553 err = cfg80211_conn_do_work(wdev); 554 cfg80211_put_bss(wdev->wiphy, bss); 555 } else { 556 /* otherwise we'll need to scan for the AP first */ 557 err = cfg80211_conn_scan(wdev); 558 559 /* 560 * If we can't scan right now, then we need to scan again 561 * after the current scan finished, since the parameters 562 * changed (unless we find a good AP anyway). 563 */ 564 if (err == -EBUSY) { 565 err = 0; 566 wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; 567 } 568 } 569 570 if (err) 571 cfg80211_sme_free(wdev); 572 573 return err; 574 } 575 576 static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) 577 { 578 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 579 int err; 580 581 if (!wdev->conn) 582 return 0; 583 584 if (!rdev->ops->deauth) 585 return -EOPNOTSUPP; 586 587 if (wdev->conn->state == CFG80211_CONN_SCANNING || 588 wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { 589 err = 0; 590 goto out; 591 } 592 593 /* wdev->conn->params.bssid must be set if > SCANNING */ 594 err = cfg80211_mlme_deauth(rdev, wdev->netdev, 595 wdev->conn->params.bssid, 596 NULL, 0, reason, false); 597 out: 598 cfg80211_sme_free(wdev); 599 return err; 600 } 601 602 /* 603 * code shared for in-device and software SME 604 */ 605 606 static bool cfg80211_is_all_idle(void) 607 { 608 struct cfg80211_registered_device *rdev; 609 struct wireless_dev *wdev; 610 bool is_all_idle = true; 611 612 /* 613 * All devices must be idle as otherwise if you are actively 614 * scanning some new beacon hints could be learned and would 615 * count as new regulatory hints. 616 */ 617 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 618 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 619 wdev_lock(wdev); 620 if (wdev->conn || wdev->current_bss) 621 is_all_idle = false; 622 wdev_unlock(wdev); 623 } 624 } 625 626 return is_all_idle; 627 } 628 629 static void disconnect_work(struct work_struct *work) 630 { 631 rtnl_lock(); 632 if (cfg80211_is_all_idle()) 633 regulatory_hint_disconnect(); 634 rtnl_unlock(); 635 } 636 637 static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); 638 639 640 /* 641 * API calls for drivers implementing connect/disconnect and 642 * SME event handling 643 */ 644 645 /* This method must consume bss one way or another */ 646 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, 647 const u8 *req_ie, size_t req_ie_len, 648 const u8 *resp_ie, size_t resp_ie_len, 649 int status, bool wextev, 650 struct cfg80211_bss *bss) 651 { 652 struct wireless_dev *wdev = dev->ieee80211_ptr; 653 const u8 *country_ie; 654 #ifdef CONFIG_CFG80211_WEXT 655 union iwreq_data wrqu; 656 #endif 657 658 ASSERT_WDEV_LOCK(wdev); 659 660 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 661 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) { 662 cfg80211_put_bss(wdev->wiphy, bss); 663 return; 664 } 665 666 nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, 667 bssid, req_ie, req_ie_len, 668 resp_ie, resp_ie_len, 669 status, GFP_KERNEL); 670 671 #ifdef CONFIG_CFG80211_WEXT 672 if (wextev) { 673 if (req_ie && status == WLAN_STATUS_SUCCESS) { 674 memset(&wrqu, 0, sizeof(wrqu)); 675 wrqu.data.length = req_ie_len; 676 wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); 677 } 678 679 if (resp_ie && status == WLAN_STATUS_SUCCESS) { 680 memset(&wrqu, 0, sizeof(wrqu)); 681 wrqu.data.length = resp_ie_len; 682 wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); 683 } 684 685 memset(&wrqu, 0, sizeof(wrqu)); 686 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 687 if (bssid && status == WLAN_STATUS_SUCCESS) { 688 memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); 689 memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); 690 wdev->wext.prev_bssid_valid = true; 691 } 692 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 693 } 694 #endif 695 696 if (!bss && (status == WLAN_STATUS_SUCCESS)) { 697 WARN_ON_ONCE(!wiphy_to_rdev(wdev->wiphy)->ops->connect); 698 bss = cfg80211_get_bss(wdev->wiphy, NULL, bssid, 699 wdev->ssid, wdev->ssid_len, 700 wdev->conn_bss_type, 701 IEEE80211_PRIVACY_ANY); 702 if (bss) 703 cfg80211_hold_bss(bss_from_pub(bss)); 704 } 705 706 if (wdev->current_bss) { 707 cfg80211_unhold_bss(wdev->current_bss); 708 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 709 wdev->current_bss = NULL; 710 } 711 712 if (status != WLAN_STATUS_SUCCESS) { 713 kzfree(wdev->connect_keys); 714 wdev->connect_keys = NULL; 715 wdev->ssid_len = 0; 716 if (bss) { 717 cfg80211_unhold_bss(bss_from_pub(bss)); 718 cfg80211_put_bss(wdev->wiphy, bss); 719 } 720 cfg80211_sme_free(wdev); 721 return; 722 } 723 724 if (WARN_ON(!bss)) 725 return; 726 727 wdev->current_bss = bss_from_pub(bss); 728 729 cfg80211_upload_connect_keys(wdev); 730 731 rcu_read_lock(); 732 country_ie = ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); 733 if (!country_ie) { 734 rcu_read_unlock(); 735 return; 736 } 737 738 country_ie = kmemdup(country_ie, 2 + country_ie[1], GFP_ATOMIC); 739 rcu_read_unlock(); 740 741 if (!country_ie) 742 return; 743 744 /* 745 * ieee80211_bss_get_ie() ensures we can access: 746 * - country_ie + 2, the start of the country ie data, and 747 * - and country_ie[1] which is the IE length 748 */ 749 regulatory_hint_country_ie(wdev->wiphy, bss->channel->band, 750 country_ie + 2, country_ie[1]); 751 kfree(country_ie); 752 } 753 754 /* Consumes bss object one way or another */ 755 void cfg80211_connect_bss(struct net_device *dev, const u8 *bssid, 756 struct cfg80211_bss *bss, const u8 *req_ie, 757 size_t req_ie_len, const u8 *resp_ie, 758 size_t resp_ie_len, int status, gfp_t gfp) 759 { 760 struct wireless_dev *wdev = dev->ieee80211_ptr; 761 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 762 struct cfg80211_event *ev; 763 unsigned long flags; 764 765 if (bss) { 766 /* Make sure the bss entry provided by the driver is valid. */ 767 struct cfg80211_internal_bss *ibss = bss_from_pub(bss); 768 769 if (WARN_ON(list_empty(&ibss->list))) { 770 cfg80211_put_bss(wdev->wiphy, bss); 771 return; 772 } 773 } 774 775 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 776 if (!ev) { 777 cfg80211_put_bss(wdev->wiphy, bss); 778 return; 779 } 780 781 ev->type = EVENT_CONNECT_RESULT; 782 if (bssid) 783 memcpy(ev->cr.bssid, bssid, ETH_ALEN); 784 if (req_ie_len) { 785 ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); 786 ev->cr.req_ie_len = req_ie_len; 787 memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); 788 } 789 if (resp_ie_len) { 790 ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 791 ev->cr.resp_ie_len = resp_ie_len; 792 memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); 793 } 794 if (bss) 795 cfg80211_hold_bss(bss_from_pub(bss)); 796 ev->cr.bss = bss; 797 ev->cr.status = status; 798 799 spin_lock_irqsave(&wdev->event_lock, flags); 800 list_add_tail(&ev->list, &wdev->event_list); 801 spin_unlock_irqrestore(&wdev->event_lock, flags); 802 queue_work(cfg80211_wq, &rdev->event_work); 803 } 804 EXPORT_SYMBOL(cfg80211_connect_bss); 805 806 /* Consumes bss object one way or another */ 807 void __cfg80211_roamed(struct wireless_dev *wdev, 808 struct cfg80211_bss *bss, 809 const u8 *req_ie, size_t req_ie_len, 810 const u8 *resp_ie, size_t resp_ie_len) 811 { 812 #ifdef CONFIG_CFG80211_WEXT 813 union iwreq_data wrqu; 814 #endif 815 ASSERT_WDEV_LOCK(wdev); 816 817 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 818 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 819 goto out; 820 821 if (WARN_ON(!wdev->current_bss)) 822 goto out; 823 824 cfg80211_unhold_bss(wdev->current_bss); 825 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 826 wdev->current_bss = NULL; 827 828 cfg80211_hold_bss(bss_from_pub(bss)); 829 wdev->current_bss = bss_from_pub(bss); 830 831 nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), 832 wdev->netdev, bss->bssid, 833 req_ie, req_ie_len, resp_ie, resp_ie_len, 834 GFP_KERNEL); 835 836 #ifdef CONFIG_CFG80211_WEXT 837 if (req_ie) { 838 memset(&wrqu, 0, sizeof(wrqu)); 839 wrqu.data.length = req_ie_len; 840 wireless_send_event(wdev->netdev, IWEVASSOCREQIE, 841 &wrqu, req_ie); 842 } 843 844 if (resp_ie) { 845 memset(&wrqu, 0, sizeof(wrqu)); 846 wrqu.data.length = resp_ie_len; 847 wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, 848 &wrqu, resp_ie); 849 } 850 851 memset(&wrqu, 0, sizeof(wrqu)); 852 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 853 memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN); 854 memcpy(wdev->wext.prev_bssid, bss->bssid, ETH_ALEN); 855 wdev->wext.prev_bssid_valid = true; 856 wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); 857 #endif 858 859 return; 860 out: 861 cfg80211_put_bss(wdev->wiphy, bss); 862 } 863 864 void cfg80211_roamed(struct net_device *dev, 865 struct ieee80211_channel *channel, 866 const u8 *bssid, 867 const u8 *req_ie, size_t req_ie_len, 868 const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) 869 { 870 struct wireless_dev *wdev = dev->ieee80211_ptr; 871 struct cfg80211_bss *bss; 872 873 bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, 874 wdev->ssid_len, 875 wdev->conn_bss_type, IEEE80211_PRIVACY_ANY); 876 if (WARN_ON(!bss)) 877 return; 878 879 cfg80211_roamed_bss(dev, bss, req_ie, req_ie_len, resp_ie, 880 resp_ie_len, gfp); 881 } 882 EXPORT_SYMBOL(cfg80211_roamed); 883 884 /* Consumes bss object one way or another */ 885 void cfg80211_roamed_bss(struct net_device *dev, 886 struct cfg80211_bss *bss, const u8 *req_ie, 887 size_t req_ie_len, const u8 *resp_ie, 888 size_t resp_ie_len, gfp_t gfp) 889 { 890 struct wireless_dev *wdev = dev->ieee80211_ptr; 891 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 892 struct cfg80211_event *ev; 893 unsigned long flags; 894 895 if (WARN_ON(!bss)) 896 return; 897 898 ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); 899 if (!ev) { 900 cfg80211_put_bss(wdev->wiphy, bss); 901 return; 902 } 903 904 ev->type = EVENT_ROAMED; 905 ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); 906 ev->rm.req_ie_len = req_ie_len; 907 memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); 908 ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; 909 ev->rm.resp_ie_len = resp_ie_len; 910 memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 911 ev->rm.bss = bss; 912 913 spin_lock_irqsave(&wdev->event_lock, flags); 914 list_add_tail(&ev->list, &wdev->event_list); 915 spin_unlock_irqrestore(&wdev->event_lock, flags); 916 queue_work(cfg80211_wq, &rdev->event_work); 917 } 918 EXPORT_SYMBOL(cfg80211_roamed_bss); 919 920 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, 921 size_t ie_len, u16 reason, bool from_ap) 922 { 923 struct wireless_dev *wdev = dev->ieee80211_ptr; 924 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 925 int i; 926 #ifdef CONFIG_CFG80211_WEXT 927 union iwreq_data wrqu; 928 #endif 929 930 ASSERT_WDEV_LOCK(wdev); 931 932 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && 933 wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) 934 return; 935 936 if (wdev->current_bss) { 937 cfg80211_unhold_bss(wdev->current_bss); 938 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); 939 } 940 941 wdev->current_bss = NULL; 942 wdev->ssid_len = 0; 943 944 nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); 945 946 /* stop critical protocol if supported */ 947 if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { 948 rdev->crit_proto_nlportid = 0; 949 rdev_crit_proto_stop(rdev, wdev); 950 } 951 952 /* 953 * Delete all the keys ... pairwise keys can't really 954 * exist any more anyway, but default keys might. 955 */ 956 if (rdev->ops->del_key) 957 for (i = 0; i < 6; i++) 958 rdev_del_key(rdev, dev, i, false, NULL); 959 960 rdev_set_qos_map(rdev, dev, NULL); 961 962 #ifdef CONFIG_CFG80211_WEXT 963 memset(&wrqu, 0, sizeof(wrqu)); 964 wrqu.ap_addr.sa_family = ARPHRD_ETHER; 965 wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); 966 wdev->wext.connect.ssid_len = 0; 967 #endif 968 969 schedule_work(&cfg80211_disconnect_work); 970 } 971 972 void cfg80211_disconnected(struct net_device *dev, u16 reason, 973 const u8 *ie, size_t ie_len, 974 bool locally_generated, gfp_t gfp) 975 { 976 struct wireless_dev *wdev = dev->ieee80211_ptr; 977 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); 978 struct cfg80211_event *ev; 979 unsigned long flags; 980 981 ev = kzalloc(sizeof(*ev) + ie_len, gfp); 982 if (!ev) 983 return; 984 985 ev->type = EVENT_DISCONNECTED; 986 ev->dc.ie = ((u8 *)ev) + sizeof(*ev); 987 ev->dc.ie_len = ie_len; 988 memcpy((void *)ev->dc.ie, ie, ie_len); 989 ev->dc.reason = reason; 990 ev->dc.locally_generated = locally_generated; 991 992 spin_lock_irqsave(&wdev->event_lock, flags); 993 list_add_tail(&ev->list, &wdev->event_list); 994 spin_unlock_irqrestore(&wdev->event_lock, flags); 995 queue_work(cfg80211_wq, &rdev->event_work); 996 } 997 EXPORT_SYMBOL(cfg80211_disconnected); 998 999 /* 1000 * API calls for nl80211/wext compatibility code 1001 */ 1002 int cfg80211_connect(struct cfg80211_registered_device *rdev, 1003 struct net_device *dev, 1004 struct cfg80211_connect_params *connect, 1005 struct cfg80211_cached_keys *connkeys, 1006 const u8 *prev_bssid) 1007 { 1008 struct wireless_dev *wdev = dev->ieee80211_ptr; 1009 int err; 1010 1011 ASSERT_WDEV_LOCK(wdev); 1012 1013 if (WARN_ON(wdev->connect_keys)) { 1014 kzfree(wdev->connect_keys); 1015 wdev->connect_keys = NULL; 1016 } 1017 1018 cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, 1019 rdev->wiphy.ht_capa_mod_mask); 1020 1021 if (connkeys && connkeys->def >= 0) { 1022 int idx; 1023 u32 cipher; 1024 1025 idx = connkeys->def; 1026 cipher = connkeys->params[idx].cipher; 1027 /* If given a WEP key we may need it for shared key auth */ 1028 if (cipher == WLAN_CIPHER_SUITE_WEP40 || 1029 cipher == WLAN_CIPHER_SUITE_WEP104) { 1030 connect->key_idx = idx; 1031 connect->key = connkeys->params[idx].key; 1032 connect->key_len = connkeys->params[idx].key_len; 1033 1034 /* 1035 * If ciphers are not set (e.g. when going through 1036 * iwconfig), we have to set them appropriately here. 1037 */ 1038 if (connect->crypto.cipher_group == 0) 1039 connect->crypto.cipher_group = cipher; 1040 1041 if (connect->crypto.n_ciphers_pairwise == 0) { 1042 connect->crypto.n_ciphers_pairwise = 1; 1043 connect->crypto.ciphers_pairwise[0] = cipher; 1044 } 1045 } 1046 } 1047 1048 wdev->connect_keys = connkeys; 1049 memcpy(wdev->ssid, connect->ssid, connect->ssid_len); 1050 wdev->ssid_len = connect->ssid_len; 1051 1052 wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : 1053 IEEE80211_BSS_TYPE_ESS; 1054 1055 if (!rdev->ops->connect) 1056 err = cfg80211_sme_connect(wdev, connect, prev_bssid); 1057 else 1058 err = rdev_connect(rdev, dev, connect); 1059 1060 if (err) { 1061 wdev->connect_keys = NULL; 1062 wdev->ssid_len = 0; 1063 return err; 1064 } 1065 1066 return 0; 1067 } 1068 1069 int cfg80211_disconnect(struct cfg80211_registered_device *rdev, 1070 struct net_device *dev, u16 reason, bool wextev) 1071 { 1072 struct wireless_dev *wdev = dev->ieee80211_ptr; 1073 int err = 0; 1074 1075 ASSERT_WDEV_LOCK(wdev); 1076 1077 kzfree(wdev->connect_keys); 1078 wdev->connect_keys = NULL; 1079 1080 if (wdev->conn) 1081 err = cfg80211_sme_disconnect(wdev, reason); 1082 else if (!rdev->ops->disconnect) 1083 cfg80211_mlme_down(rdev, dev); 1084 else if (wdev->current_bss) 1085 err = rdev_disconnect(rdev, dev, reason); 1086 1087 return err; 1088 } 1089