wpa_supplicant.c revision 1f69aa52ea2e0a73ac502565df8c666ee49cab6a
1/* 2 * WPA Supplicant 3 * Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 * 14 * This file implements functions for registering and unregistering 15 * %wpa_supplicant interfaces. In addition, this file contains number of 16 * functions for managing network connections. 17 */ 18 19#include "includes.h" 20 21#include "common.h" 22#include "crypto/random.h" 23#include "crypto/sha1.h" 24#include "eapol_supp/eapol_supp_sm.h" 25#include "eap_peer/eap.h" 26#include "eap_server/eap_methods.h" 27#include "rsn_supp/wpa.h" 28#include "eloop.h" 29#include "config.h" 30#include "l2_packet/l2_packet.h" 31#include "wpa_supplicant_i.h" 32#include "driver_i.h" 33#include "ctrl_iface.h" 34#include "pcsc_funcs.h" 35#include "common/version.h" 36#include "rsn_supp/preauth.h" 37#include "rsn_supp/pmksa_cache.h" 38#include "common/wpa_ctrl.h" 39#include "common/ieee802_11_defs.h" 40#include "p2p/p2p.h" 41#include "blacklist.h" 42#include "wpas_glue.h" 43#include "wps_supplicant.h" 44#include "ibss_rsn.h" 45#include "sme.h" 46#include "gas_query.h" 47#include "ap.h" 48#include "p2p_supplicant.h" 49#include "notify.h" 50#include "bgscan.h" 51#include "bss.h" 52#include "scan.h" 53#include "offchannel.h" 54 55const char *wpa_supplicant_version = 56"wpa_supplicant v" VERSION_STR "\n" 57"Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi> and contributors"; 58 59const char *wpa_supplicant_license = 60"This program is free software. You can distribute it and/or modify it\n" 61"under the terms of the GNU General Public License version 2.\n" 62"\n" 63"Alternatively, this software may be distributed under the terms of the\n" 64"BSD license. See README and COPYING for more details.\n" 65#ifdef EAP_TLS_OPENSSL 66"\nThis product includes software developed by the OpenSSL Project\n" 67"for use in the OpenSSL Toolkit (http://www.openssl.org/)\n" 68#endif /* EAP_TLS_OPENSSL */ 69; 70 71#ifndef CONFIG_NO_STDOUT_DEBUG 72/* Long text divided into parts in order to fit in C89 strings size limits. */ 73const char *wpa_supplicant_full_license1 = 74"This program is free software; you can redistribute it and/or modify\n" 75"it under the terms of the GNU General Public License version 2 as\n" 76"published by the Free Software Foundation.\n" 77"\n" 78"This program is distributed in the hope that it will be useful,\n" 79"but WITHOUT ANY WARRANTY; without even the implied warranty of\n" 80"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" 81"GNU General Public License for more details.\n" 82"\n"; 83const char *wpa_supplicant_full_license2 = 84"You should have received a copy of the GNU General Public License\n" 85"along with this program; if not, write to the Free Software\n" 86"Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA\n" 87"\n" 88"Alternatively, this software may be distributed under the terms of the\n" 89"BSD license.\n" 90"\n" 91"Redistribution and use in source and binary forms, with or without\n" 92"modification, are permitted provided that the following conditions are\n" 93"met:\n" 94"\n"; 95const char *wpa_supplicant_full_license3 = 96"1. Redistributions of source code must retain the above copyright\n" 97" notice, this list of conditions and the following disclaimer.\n" 98"\n" 99"2. Redistributions in binary form must reproduce the above copyright\n" 100" notice, this list of conditions and the following disclaimer in the\n" 101" documentation and/or other materials provided with the distribution.\n" 102"\n"; 103const char *wpa_supplicant_full_license4 = 104"3. Neither the name(s) of the above-listed copyright holder(s) nor the\n" 105" names of its contributors may be used to endorse or promote products\n" 106" derived from this software without specific prior written permission.\n" 107"\n" 108"THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n" 109"\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n" 110"LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n" 111"A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n"; 112const char *wpa_supplicant_full_license5 = 113"OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n" 114"SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n" 115"LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n" 116"DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n" 117"THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n" 118"(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n" 119"OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n" 120"\n"; 121#endif /* CONFIG_NO_STDOUT_DEBUG */ 122 123extern int wpa_debug_level; 124extern int wpa_debug_show_keys; 125extern int wpa_debug_timestamp; 126extern struct wpa_driver_ops *wpa_drivers[]; 127 128/* Configure default/group WEP keys for static WEP */ 129int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) 130{ 131 int i, set = 0; 132 133 for (i = 0; i < NUM_WEP_KEYS; i++) { 134 if (ssid->wep_key_len[i] == 0) 135 continue; 136 137 set = 1; 138 wpa_drv_set_key(wpa_s, WPA_ALG_WEP, NULL, 139 i, i == ssid->wep_tx_keyidx, NULL, 0, 140 ssid->wep_key[i], ssid->wep_key_len[i]); 141 } 142 143 return set; 144} 145 146 147static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s, 148 struct wpa_ssid *ssid) 149{ 150 u8 key[32]; 151 size_t keylen; 152 enum wpa_alg alg; 153 u8 seq[6] = { 0 }; 154 155 /* IBSS/WPA-None uses only one key (Group) for both receiving and 156 * sending unicast and multicast packets. */ 157 158 if (ssid->mode != WPAS_MODE_IBSS) { 159 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid mode %d (not " 160 "IBSS/ad-hoc) for WPA-None", ssid->mode); 161 return -1; 162 } 163 164 if (!ssid->psk_set) { 165 wpa_msg(wpa_s, MSG_INFO, "WPA: No PSK configured for " 166 "WPA-None"); 167 return -1; 168 } 169 170 switch (wpa_s->group_cipher) { 171 case WPA_CIPHER_CCMP: 172 os_memcpy(key, ssid->psk, 16); 173 keylen = 16; 174 alg = WPA_ALG_CCMP; 175 break; 176 case WPA_CIPHER_TKIP: 177 /* WPA-None uses the same Michael MIC key for both TX and RX */ 178 os_memcpy(key, ssid->psk, 16 + 8); 179 os_memcpy(key + 16 + 8, ssid->psk + 16, 8); 180 keylen = 32; 181 alg = WPA_ALG_TKIP; 182 break; 183 default: 184 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid group cipher %d for " 185 "WPA-None", wpa_s->group_cipher); 186 return -1; 187 } 188 189 /* TODO: should actually remember the previously used seq#, both for TX 190 * and RX from each STA.. */ 191 192 return wpa_drv_set_key(wpa_s, alg, NULL, 0, 1, seq, 6, key, keylen); 193} 194 195 196static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx) 197{ 198 struct wpa_supplicant *wpa_s = eloop_ctx; 199 const u8 *bssid = wpa_s->bssid; 200 if (is_zero_ether_addr(bssid)) 201 bssid = wpa_s->pending_bssid; 202 wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.", 203 MAC2STR(bssid)); 204 wpa_blacklist_add(wpa_s, bssid); 205 wpa_sm_notify_disassoc(wpa_s->wpa); 206 wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING); 207 wpa_s->reassociate = 1; 208 209 /* 210 * If we timed out, the AP or the local radio may be busy. 211 * So, wait a second until scanning again. 212 */ 213 wpa_supplicant_req_scan(wpa_s, 1, 0); 214} 215 216 217/** 218 * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication 219 * @wpa_s: Pointer to wpa_supplicant data 220 * @sec: Number of seconds after which to time out authentication 221 * @usec: Number of microseconds after which to time out authentication 222 * 223 * This function is used to schedule a timeout for the current authentication 224 * attempt. 225 */ 226void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s, 227 int sec, int usec) 228{ 229 if (wpa_s->conf && wpa_s->conf->ap_scan == 0 && 230 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) 231 return; 232 233 wpa_dbg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec " 234 "%d usec", sec, usec); 235 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL); 236 eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL); 237} 238 239 240/** 241 * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout 242 * @wpa_s: Pointer to wpa_supplicant data 243 * 244 * This function is used to cancel authentication timeout scheduled with 245 * wpa_supplicant_req_auth_timeout() and it is called when authentication has 246 * been completed. 247 */ 248void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s) 249{ 250 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout"); 251 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL); 252 wpa_blacklist_del(wpa_s, wpa_s->bssid); 253} 254 255 256/** 257 * wpa_supplicant_initiate_eapol - Configure EAPOL state machine 258 * @wpa_s: Pointer to wpa_supplicant data 259 * 260 * This function is used to configure EAPOL state machine based on the selected 261 * authentication mode. 262 */ 263void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s) 264{ 265#ifdef IEEE8021X_EAPOL 266 struct eapol_config eapol_conf; 267 struct wpa_ssid *ssid = wpa_s->current_ssid; 268 269#ifdef CONFIG_IBSS_RSN 270 if (ssid->mode == WPAS_MODE_IBSS && 271 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE && 272 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) { 273 /* 274 * RSN IBSS authentication is per-STA and we can disable the 275 * per-BSSID EAPOL authentication. 276 */ 277 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized); 278 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE); 279 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE); 280 return; 281 } 282#endif /* CONFIG_IBSS_RSN */ 283 284 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); 285 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE); 286 287 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || 288 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) 289 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized); 290 else 291 eapol_sm_notify_portControl(wpa_s->eapol, Auto); 292 293 os_memset(&eapol_conf, 0, sizeof(eapol_conf)); 294 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 295 eapol_conf.accept_802_1x_keys = 1; 296 eapol_conf.required_keys = 0; 297 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) { 298 eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST; 299 } 300 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) { 301 eapol_conf.required_keys |= 302 EAPOL_REQUIRE_KEY_BROADCAST; 303 } 304 305 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) 306 eapol_conf.required_keys = 0; 307 } 308 if (wpa_s->conf) 309 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth; 310 eapol_conf.workaround = ssid->eap_workaround; 311 eapol_conf.eap_disabled = 312 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) && 313 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA && 314 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS; 315 eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf); 316#endif /* IEEE8021X_EAPOL */ 317} 318 319 320/** 321 * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode 322 * @wpa_s: Pointer to wpa_supplicant data 323 * @ssid: Configuration data for the network 324 * 325 * This function is used to configure WPA state machine and related parameters 326 * to a mode where WPA is not enabled. This is called as part of the 327 * authentication configuration when the selected network does not use WPA. 328 */ 329void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s, 330 struct wpa_ssid *ssid) 331{ 332 int i; 333 334 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) 335 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS; 336 else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) 337 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA; 338 else 339 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE; 340 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0); 341 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0); 342 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 343 wpa_s->pairwise_cipher = WPA_CIPHER_NONE; 344 wpa_s->group_cipher = WPA_CIPHER_NONE; 345 wpa_s->mgmt_group_cipher = 0; 346 347 for (i = 0; i < NUM_WEP_KEYS; i++) { 348 if (ssid->wep_key_len[i] > 5) { 349 wpa_s->pairwise_cipher = WPA_CIPHER_WEP104; 350 wpa_s->group_cipher = WPA_CIPHER_WEP104; 351 break; 352 } else if (ssid->wep_key_len[i] > 0) { 353 wpa_s->pairwise_cipher = WPA_CIPHER_WEP40; 354 wpa_s->group_cipher = WPA_CIPHER_WEP40; 355 break; 356 } 357 } 358 359 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0); 360 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt); 361 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE, 362 wpa_s->pairwise_cipher); 363 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher); 364#ifdef CONFIG_IEEE80211W 365 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP, 366 wpa_s->mgmt_group_cipher); 367#endif /* CONFIG_IEEE80211W */ 368 369 pmksa_cache_clear_current(wpa_s->wpa); 370} 371 372 373static void free_hw_features(struct wpa_supplicant *wpa_s) 374{ 375 int i; 376 if (wpa_s->hw.modes == NULL) 377 return; 378 379 for (i = 0; i < wpa_s->hw.num_modes; i++) { 380 os_free(wpa_s->hw.modes[i].channels); 381 os_free(wpa_s->hw.modes[i].rates); 382 } 383 384 os_free(wpa_s->hw.modes); 385 wpa_s->hw.modes = NULL; 386} 387 388 389static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s) 390{ 391 bgscan_deinit(wpa_s); 392 scard_deinit(wpa_s->scard); 393 wpa_s->scard = NULL; 394 wpa_sm_set_scard_ctx(wpa_s->wpa, NULL); 395 eapol_sm_register_scard_ctx(wpa_s->eapol, NULL); 396 l2_packet_deinit(wpa_s->l2); 397 wpa_s->l2 = NULL; 398 if (wpa_s->l2_br) { 399 l2_packet_deinit(wpa_s->l2_br); 400 wpa_s->l2_br = NULL; 401 } 402 403 if (wpa_s->conf != NULL) { 404 struct wpa_ssid *ssid; 405 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) 406 wpas_notify_network_removed(wpa_s, ssid); 407 } 408 409 os_free(wpa_s->confname); 410 wpa_s->confname = NULL; 411 412 wpa_sm_set_eapol(wpa_s->wpa, NULL); 413 eapol_sm_deinit(wpa_s->eapol); 414 wpa_s->eapol = NULL; 415 416 rsn_preauth_deinit(wpa_s->wpa); 417 418#ifdef CONFIG_TDLS 419 wpa_tdls_deinit(wpa_s->wpa); 420#endif /* CONFIG_TDLS */ 421 422 pmksa_candidate_free(wpa_s->wpa); 423 wpa_sm_deinit(wpa_s->wpa); 424 wpa_s->wpa = NULL; 425 wpa_blacklist_clear(wpa_s); 426 427 wpa_bss_deinit(wpa_s); 428 429 wpa_supplicant_cancel_scan(wpa_s); 430 wpa_supplicant_cancel_auth_timeout(wpa_s); 431 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, wpa_s, NULL); 432#ifdef CONFIG_DELAYED_MIC_ERROR_REPORT 433 eloop_cancel_timeout(wpa_supplicant_delayed_mic_error_report, 434 wpa_s, NULL); 435#endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */ 436 437 wpas_wps_deinit(wpa_s); 438 439 wpabuf_free(wpa_s->pending_eapol_rx); 440 wpa_s->pending_eapol_rx = NULL; 441 442#ifdef CONFIG_IBSS_RSN 443 ibss_rsn_deinit(wpa_s->ibss_rsn); 444 wpa_s->ibss_rsn = NULL; 445#endif /* CONFIG_IBSS_RSN */ 446 447 sme_deinit(wpa_s); 448 449#ifdef CONFIG_AP 450 wpa_supplicant_ap_deinit(wpa_s); 451#endif /* CONFIG_AP */ 452 453#ifdef CONFIG_P2P 454 wpas_p2p_deinit(wpa_s); 455#endif /* CONFIG_P2P */ 456 457#ifdef CONFIG_OFFCHANNEL 458 offchannel_deinit(wpa_s); 459#endif /* CONFIG_OFFCHANNEL */ 460 461 wpa_supplicant_cancel_sched_scan(wpa_s); 462 463 os_free(wpa_s->next_scan_freqs); 464 wpa_s->next_scan_freqs = NULL; 465 466 gas_query_deinit(wpa_s->gas); 467 wpa_s->gas = NULL; 468 469 free_hw_features(wpa_s); 470} 471 472 473/** 474 * wpa_clear_keys - Clear keys configured for the driver 475 * @wpa_s: Pointer to wpa_supplicant data 476 * @addr: Previously used BSSID or %NULL if not available 477 * 478 * This function clears the encryption keys that has been previously configured 479 * for the driver. 480 */ 481void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr) 482{ 483 if (wpa_s->keys_cleared) { 484 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have 485 * timing issues with keys being cleared just before new keys 486 * are set or just after association or something similar. This 487 * shows up in group key handshake failing often because of the 488 * client not receiving the first encrypted packets correctly. 489 * Skipping some of the extra key clearing steps seems to help 490 * in completing group key handshake more reliably. */ 491 wpa_dbg(wpa_s, MSG_DEBUG, "No keys have been configured - " 492 "skip key clearing"); 493 return; 494 } 495 496 /* MLME-DELETEKEYS.request */ 497 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 0, 0, NULL, 0, NULL, 0); 498 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 1, 0, NULL, 0, NULL, 0); 499 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 2, 0, NULL, 0, NULL, 0); 500 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 3, 0, NULL, 0, NULL, 0); 501#ifdef CONFIG_IEEE80211W 502 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 4, 0, NULL, 0, NULL, 0); 503 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 5, 0, NULL, 0, NULL, 0); 504#endif /* CONFIG_IEEE80211W */ 505 if (addr) { 506 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL, 507 0); 508 /* MLME-SETPROTECTION.request(None) */ 509 wpa_drv_mlme_setprotection( 510 wpa_s, addr, 511 MLME_SETPROTECTION_PROTECT_TYPE_NONE, 512 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 513 } 514 wpa_s->keys_cleared = 1; 515} 516 517 518/** 519 * wpa_supplicant_state_txt - Get the connection state name as a text string 520 * @state: State (wpa_state; WPA_*) 521 * Returns: The state name as a printable text string 522 */ 523const char * wpa_supplicant_state_txt(enum wpa_states state) 524{ 525 switch (state) { 526 case WPA_DISCONNECTED: 527 return "DISCONNECTED"; 528 case WPA_INACTIVE: 529 return "INACTIVE"; 530 case WPA_INTERFACE_DISABLED: 531 return "INTERFACE_DISABLED"; 532 case WPA_SCANNING: 533 return "SCANNING"; 534 case WPA_AUTHENTICATING: 535 return "AUTHENTICATING"; 536 case WPA_ASSOCIATING: 537 return "ASSOCIATING"; 538 case WPA_ASSOCIATED: 539 return "ASSOCIATED"; 540 case WPA_4WAY_HANDSHAKE: 541 return "4WAY_HANDSHAKE"; 542 case WPA_GROUP_HANDSHAKE: 543 return "GROUP_HANDSHAKE"; 544 case WPA_COMPLETED: 545 return "COMPLETED"; 546 default: 547 return "UNKNOWN"; 548 } 549} 550 551 552#ifdef CONFIG_BGSCAN 553 554static void wpa_supplicant_start_bgscan(struct wpa_supplicant *wpa_s) 555{ 556 if (wpas_driver_bss_selection(wpa_s)) 557 return; 558 if (wpa_s->current_ssid == wpa_s->bgscan_ssid) 559 return; 560 561 bgscan_deinit(wpa_s); 562 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) { 563 if (bgscan_init(wpa_s, wpa_s->current_ssid)) { 564 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize " 565 "bgscan"); 566 /* 567 * Live without bgscan; it is only used as a roaming 568 * optimization, so the initial connection is not 569 * affected. 570 */ 571 } else 572 wpa_s->bgscan_ssid = wpa_s->current_ssid; 573 } else 574 wpa_s->bgscan_ssid = NULL; 575} 576 577 578static void wpa_supplicant_stop_bgscan(struct wpa_supplicant *wpa_s) 579{ 580 if (wpa_s->bgscan_ssid != NULL) { 581 bgscan_deinit(wpa_s); 582 wpa_s->bgscan_ssid = NULL; 583 } 584} 585 586#endif /* CONFIG_BGSCAN */ 587 588 589/** 590 * wpa_supplicant_set_state - Set current connection state 591 * @wpa_s: Pointer to wpa_supplicant data 592 * @state: The new connection state 593 * 594 * This function is called whenever the connection state changes, e.g., 595 * association is completed for WPA/WPA2 4-Way Handshake is started. 596 */ 597void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, 598 enum wpa_states state) 599{ 600 enum wpa_states old_state = wpa_s->wpa_state; 601 602 wpa_dbg(wpa_s, MSG_DEBUG, "State: %s -> %s", 603 wpa_supplicant_state_txt(wpa_s->wpa_state), 604 wpa_supplicant_state_txt(state)); 605 606 if (state != WPA_SCANNING) 607 wpa_supplicant_notify_scanning(wpa_s, 0); 608 609 if (state == WPA_COMPLETED && wpa_s->new_connection) { 610#if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG) 611 struct wpa_ssid *ssid = wpa_s->current_ssid; 612 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to " 613 MACSTR " completed %s [id=%d id_str=%s]", 614 MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ? 615 "(reauth)" : "(auth)", 616 ssid ? ssid->id : -1, 617 ssid && ssid->id_str ? ssid->id_str : ""); 618#endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */ 619 wpa_s->new_connection = 0; 620 wpa_s->reassociated_connection = 1; 621 wpa_drv_set_operstate(wpa_s, 1); 622#ifndef IEEE8021X_EAPOL 623 wpa_drv_set_supp_port(wpa_s, 1); 624#endif /* IEEE8021X_EAPOL */ 625 wpa_s->after_wps = 0; 626#ifdef CONFIG_P2P 627 wpas_p2p_completed(wpa_s); 628#endif /* CONFIG_P2P */ 629 } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING || 630 state == WPA_ASSOCIATED) { 631 wpa_s->new_connection = 1; 632 wpa_drv_set_operstate(wpa_s, 0); 633#ifndef IEEE8021X_EAPOL 634 wpa_drv_set_supp_port(wpa_s, 0); 635#endif /* IEEE8021X_EAPOL */ 636 } 637 wpa_s->wpa_state = state; 638 639#ifdef CONFIG_BGSCAN 640 if (state == WPA_COMPLETED) 641 wpa_supplicant_start_bgscan(wpa_s); 642 else 643 wpa_supplicant_stop_bgscan(wpa_s); 644#endif /* CONFIG_BGSCAN */ 645 646 if (wpa_s->wpa_state != old_state) { 647 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state); 648 649 if (wpa_s->wpa_state == WPA_COMPLETED || 650 old_state == WPA_COMPLETED) 651 wpas_notify_auth_changed(wpa_s); 652 } 653} 654 655 656void wpa_supplicant_terminate_proc(struct wpa_global *global) 657{ 658 int pending = 0; 659#ifdef CONFIG_WPS 660 struct wpa_supplicant *wpa_s = global->ifaces; 661 while (wpa_s) { 662 if (wpas_wps_terminate_pending(wpa_s) == 1) 663 pending = 1; 664 wpa_s = wpa_s->next; 665 } 666#endif /* CONFIG_WPS */ 667 if (pending) 668 return; 669 eloop_terminate(); 670} 671 672 673static void wpa_supplicant_terminate(int sig, void *signal_ctx) 674{ 675 struct wpa_global *global = signal_ctx; 676 struct wpa_supplicant *wpa_s; 677 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { 678 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d " 679 "received", sig); 680 } 681 wpa_supplicant_terminate_proc(global); 682} 683 684 685void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s) 686{ 687 enum wpa_states old_state = wpa_s->wpa_state; 688 689 wpa_s->pairwise_cipher = 0; 690 wpa_s->group_cipher = 0; 691 wpa_s->mgmt_group_cipher = 0; 692 wpa_s->key_mgmt = 0; 693 if (wpa_s->wpa_state != WPA_INTERFACE_DISABLED) 694 wpa_s->wpa_state = WPA_DISCONNECTED; 695 696 if (wpa_s->wpa_state != old_state) 697 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state); 698} 699 700 701/** 702 * wpa_supplicant_reload_configuration - Reload configuration data 703 * @wpa_s: Pointer to wpa_supplicant data 704 * Returns: 0 on success or -1 if configuration parsing failed 705 * 706 * This function can be used to request that the configuration data is reloaded 707 * (e.g., after configuration file change). This function is reloading 708 * configuration only for one interface, so this may need to be called multiple 709 * times if %wpa_supplicant is controlling multiple interfaces and all 710 * interfaces need reconfiguration. 711 */ 712int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s) 713{ 714 struct wpa_config *conf; 715 int reconf_ctrl; 716 int old_ap_scan; 717 718 if (wpa_s->confname == NULL) 719 return -1; 720 conf = wpa_config_read(wpa_s->confname); 721 if (conf == NULL) { 722 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration " 723 "file '%s' - exiting", wpa_s->confname); 724 return -1; 725 } 726 conf->changed_parameters = (unsigned int) -1; 727 728 reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface 729 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface && 730 os_strcmp(conf->ctrl_interface, 731 wpa_s->conf->ctrl_interface) != 0); 732 733 if (reconf_ctrl && wpa_s->ctrl_iface) { 734 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface); 735 wpa_s->ctrl_iface = NULL; 736 } 737 738 eapol_sm_invalidate_cached_session(wpa_s->eapol); 739 if (wpa_s->current_ssid) { 740 wpa_supplicant_deauthenticate(wpa_s, 741 WLAN_REASON_DEAUTH_LEAVING); 742 } 743 744 /* 745 * TODO: should notify EAPOL SM about changes in opensc_engine_path, 746 * pkcs11_engine_path, pkcs11_module_path. 747 */ 748 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) { 749 /* 750 * Clear forced success to clear EAP state for next 751 * authentication. 752 */ 753 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); 754 } 755 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); 756 wpa_sm_set_config(wpa_s->wpa, NULL); 757 wpa_sm_pmksa_cache_flush(wpa_s->wpa, NULL); 758 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth); 759 rsn_preauth_deinit(wpa_s->wpa); 760 761 old_ap_scan = wpa_s->conf->ap_scan; 762 wpa_config_free(wpa_s->conf); 763 wpa_s->conf = conf; 764 if (old_ap_scan != wpa_s->conf->ap_scan) 765 wpas_notify_ap_scan_changed(wpa_s); 766 767 if (reconf_ctrl) 768 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s); 769 770 wpa_supplicant_update_config(wpa_s); 771 772 wpa_supplicant_clear_status(wpa_s); 773 if (wpa_supplicant_enabled_networks(wpa_s->conf)) { 774 wpa_s->reassociate = 1; 775 wpa_supplicant_req_scan(wpa_s, 0, 0); 776 } 777 wpa_dbg(wpa_s, MSG_DEBUG, "Reconfiguration completed"); 778 return 0; 779} 780 781 782static void wpa_supplicant_reconfig(int sig, void *signal_ctx) 783{ 784 struct wpa_global *global = signal_ctx; 785 struct wpa_supplicant *wpa_s; 786 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { 787 wpa_dbg(wpa_s, MSG_DEBUG, "Signal %d received - reconfiguring", 788 sig); 789 if (wpa_supplicant_reload_configuration(wpa_s) < 0) { 790 wpa_supplicant_terminate_proc(global); 791 } 792 } 793} 794 795 796enum wpa_cipher cipher_suite2driver(int cipher) 797{ 798 switch (cipher) { 799 case WPA_CIPHER_NONE: 800 return CIPHER_NONE; 801 case WPA_CIPHER_WEP40: 802 return CIPHER_WEP40; 803 case WPA_CIPHER_WEP104: 804 return CIPHER_WEP104; 805 case WPA_CIPHER_CCMP: 806 return CIPHER_CCMP; 807 case WPA_CIPHER_TKIP: 808 default: 809 return CIPHER_TKIP; 810 } 811} 812 813 814enum wpa_key_mgmt key_mgmt2driver(int key_mgmt) 815{ 816 switch (key_mgmt) { 817 case WPA_KEY_MGMT_NONE: 818 return KEY_MGMT_NONE; 819 case WPA_KEY_MGMT_IEEE8021X_NO_WPA: 820 return KEY_MGMT_802_1X_NO_WPA; 821 case WPA_KEY_MGMT_IEEE8021X: 822 return KEY_MGMT_802_1X; 823 case WPA_KEY_MGMT_WPA_NONE: 824 return KEY_MGMT_WPA_NONE; 825 case WPA_KEY_MGMT_FT_IEEE8021X: 826 return KEY_MGMT_FT_802_1X; 827 case WPA_KEY_MGMT_FT_PSK: 828 return KEY_MGMT_FT_PSK; 829 case WPA_KEY_MGMT_IEEE8021X_SHA256: 830 return KEY_MGMT_802_1X_SHA256; 831 case WPA_KEY_MGMT_PSK_SHA256: 832 return KEY_MGMT_PSK_SHA256; 833 case WPA_KEY_MGMT_WPS: 834 return KEY_MGMT_WPS; 835 case WPA_KEY_MGMT_PSK: 836 default: 837 return KEY_MGMT_PSK; 838 } 839} 840 841 842static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s, 843 struct wpa_ssid *ssid, 844 struct wpa_ie_data *ie) 845{ 846 int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie); 847 if (ret) { 848 if (ret == -2) { 849 wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE " 850 "from association info"); 851 } 852 return -1; 853 } 854 855 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set " 856 "cipher suites"); 857 if (!(ie->group_cipher & ssid->group_cipher)) { 858 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group " 859 "cipher 0x%x (mask 0x%x) - reject", 860 ie->group_cipher, ssid->group_cipher); 861 return -1; 862 } 863 if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) { 864 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise " 865 "cipher 0x%x (mask 0x%x) - reject", 866 ie->pairwise_cipher, ssid->pairwise_cipher); 867 return -1; 868 } 869 if (!(ie->key_mgmt & ssid->key_mgmt)) { 870 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key " 871 "management 0x%x (mask 0x%x) - reject", 872 ie->key_mgmt, ssid->key_mgmt); 873 return -1; 874 } 875 876#ifdef CONFIG_IEEE80211W 877 if (!(ie->capabilities & WPA_CAPABILITY_MFPC) && 878 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) { 879 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP " 880 "that does not support management frame protection - " 881 "reject"); 882 return -1; 883 } 884#endif /* CONFIG_IEEE80211W */ 885 886 return 0; 887} 888 889 890/** 891 * wpa_supplicant_set_suites - Set authentication and encryption parameters 892 * @wpa_s: Pointer to wpa_supplicant data 893 * @bss: Scan results for the selected BSS, or %NULL if not available 894 * @ssid: Configuration data for the selected network 895 * @wpa_ie: Buffer for the WPA/RSN IE 896 * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the 897 * used buffer length in case the functions returns success. 898 * Returns: 0 on success or -1 on failure 899 * 900 * This function is used to configure authentication and encryption parameters 901 * based on the network configuration and scan result for the selected BSS (if 902 * available). 903 */ 904int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s, 905 struct wpa_bss *bss, struct wpa_ssid *ssid, 906 u8 *wpa_ie, size_t *wpa_ie_len) 907{ 908 struct wpa_ie_data ie; 909 int sel, proto; 910 const u8 *bss_wpa, *bss_rsn; 911 912 if (bss) { 913 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE); 914 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 915 } else 916 bss_wpa = bss_rsn = NULL; 917 918 if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) && 919 wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 && 920 (ie.group_cipher & ssid->group_cipher) && 921 (ie.pairwise_cipher & ssid->pairwise_cipher) && 922 (ie.key_mgmt & ssid->key_mgmt)) { 923 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0"); 924 proto = WPA_PROTO_RSN; 925 } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) && 926 wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 && 927 (ie.group_cipher & ssid->group_cipher) && 928 (ie.pairwise_cipher & ssid->pairwise_cipher) && 929 (ie.key_mgmt & ssid->key_mgmt)) { 930 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0"); 931 proto = WPA_PROTO_WPA; 932 } else if (bss) { 933 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN"); 934 return -1; 935 } else { 936 if (ssid->proto & WPA_PROTO_RSN) 937 proto = WPA_PROTO_RSN; 938 else 939 proto = WPA_PROTO_WPA; 940 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) { 941 os_memset(&ie, 0, sizeof(ie)); 942 ie.group_cipher = ssid->group_cipher; 943 ie.pairwise_cipher = ssid->pairwise_cipher; 944 ie.key_mgmt = ssid->key_mgmt; 945#ifdef CONFIG_IEEE80211W 946 ie.mgmt_group_cipher = 947 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ? 948 WPA_CIPHER_AES_128_CMAC : 0; 949#endif /* CONFIG_IEEE80211W */ 950 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Set cipher suites " 951 "based on configuration"); 952 } else 953 proto = ie.proto; 954 } 955 956 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected cipher suites: group %d " 957 "pairwise %d key_mgmt %d proto %d", 958 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto); 959#ifdef CONFIG_IEEE80211W 960 if (ssid->ieee80211w) { 961 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected mgmt group cipher %d", 962 ie.mgmt_group_cipher); 963 } 964#endif /* CONFIG_IEEE80211W */ 965 966 wpa_s->wpa_proto = proto; 967 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto); 968 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 969 !!(ssid->proto & WPA_PROTO_RSN)); 970 971 if (bss || !wpa_s->ap_ies_from_associnfo) { 972 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa, 973 bss_wpa ? 2 + bss_wpa[1] : 0) || 974 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn, 975 bss_rsn ? 2 + bss_rsn[1] : 0)) 976 return -1; 977 } 978 979 sel = ie.group_cipher & ssid->group_cipher; 980 if (sel & WPA_CIPHER_CCMP) { 981 wpa_s->group_cipher = WPA_CIPHER_CCMP; 982 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP"); 983 } else if (sel & WPA_CIPHER_TKIP) { 984 wpa_s->group_cipher = WPA_CIPHER_TKIP; 985 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP"); 986 } else if (sel & WPA_CIPHER_WEP104) { 987 wpa_s->group_cipher = WPA_CIPHER_WEP104; 988 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104"); 989 } else if (sel & WPA_CIPHER_WEP40) { 990 wpa_s->group_cipher = WPA_CIPHER_WEP40; 991 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40"); 992 } else { 993 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select group " 994 "cipher"); 995 return -1; 996 } 997 998 sel = ie.pairwise_cipher & ssid->pairwise_cipher; 999 if (sel & WPA_CIPHER_CCMP) { 1000 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP; 1001 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP"); 1002 } else if (sel & WPA_CIPHER_TKIP) { 1003 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP; 1004 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP"); 1005 } else if (sel & WPA_CIPHER_NONE) { 1006 wpa_s->pairwise_cipher = WPA_CIPHER_NONE; 1007 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE"); 1008 } else { 1009 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select pairwise " 1010 "cipher"); 1011 return -1; 1012 } 1013 1014 sel = ie.key_mgmt & ssid->key_mgmt; 1015 if (0) { 1016#ifdef CONFIG_IEEE80211R 1017 } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) { 1018 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X; 1019 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X"); 1020 } else if (sel & WPA_KEY_MGMT_FT_PSK) { 1021 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK; 1022 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK"); 1023#endif /* CONFIG_IEEE80211R */ 1024#ifdef CONFIG_IEEE80211W 1025 } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) { 1026 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256; 1027 wpa_dbg(wpa_s, MSG_DEBUG, 1028 "WPA: using KEY_MGMT 802.1X with SHA256"); 1029 } else if (sel & WPA_KEY_MGMT_PSK_SHA256) { 1030 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256; 1031 wpa_dbg(wpa_s, MSG_DEBUG, 1032 "WPA: using KEY_MGMT PSK with SHA256"); 1033#endif /* CONFIG_IEEE80211W */ 1034 } else if (sel & WPA_KEY_MGMT_IEEE8021X) { 1035 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 1036 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X"); 1037 } else if (sel & WPA_KEY_MGMT_PSK) { 1038 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK; 1039 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK"); 1040 } else if (sel & WPA_KEY_MGMT_WPA_NONE) { 1041 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE; 1042 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE"); 1043 } else { 1044 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select " 1045 "authenticated key management type"); 1046 return -1; 1047 } 1048 1049 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt); 1050 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE, 1051 wpa_s->pairwise_cipher); 1052 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher); 1053 1054#ifdef CONFIG_IEEE80211W 1055 sel = ie.mgmt_group_cipher; 1056 if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION || 1057 !(ie.capabilities & WPA_CAPABILITY_MFPC)) 1058 sel = 0; 1059 if (sel & WPA_CIPHER_AES_128_CMAC) { 1060 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC; 1061 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher " 1062 "AES-128-CMAC"); 1063 } else { 1064 wpa_s->mgmt_group_cipher = 0; 1065 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher"); 1066 } 1067 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP, 1068 wpa_s->mgmt_group_cipher); 1069 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w); 1070#endif /* CONFIG_IEEE80211W */ 1071 1072 if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) { 1073 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to generate WPA IE"); 1074 return -1; 1075 } 1076 1077 if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt)) { 1078 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN); 1079#ifndef CONFIG_NO_PBKDF2 1080 if (bss && ssid->bssid_set && ssid->ssid_len == 0 && 1081 ssid->passphrase) { 1082 u8 psk[PMK_LEN]; 1083 pbkdf2_sha1(ssid->passphrase, (char *) bss->ssid, 1084 bss->ssid_len, 4096, psk, PMK_LEN); 1085 wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)", 1086 psk, PMK_LEN); 1087 wpa_sm_set_pmk(wpa_s->wpa, psk, PMK_LEN); 1088 } 1089#endif /* CONFIG_NO_PBKDF2 */ 1090 } else 1091 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa); 1092 1093 return 0; 1094} 1095 1096 1097/** 1098 * wpa_supplicant_associate - Request association 1099 * @wpa_s: Pointer to wpa_supplicant data 1100 * @bss: Scan results for the selected BSS, or %NULL if not available 1101 * @ssid: Configuration data for the selected network 1102 * 1103 * This function is used to request %wpa_supplicant to associate with a BSS. 1104 */ 1105void wpa_supplicant_associate(struct wpa_supplicant *wpa_s, 1106 struct wpa_bss *bss, struct wpa_ssid *ssid) 1107{ 1108 u8 wpa_ie[200]; 1109 size_t wpa_ie_len; 1110 int use_crypt, ret, i, bssid_changed; 1111 int algs = WPA_AUTH_ALG_OPEN; 1112 enum wpa_cipher cipher_pairwise, cipher_group; 1113 struct wpa_driver_associate_params params; 1114 int wep_keys_set = 0; 1115 struct wpa_driver_capa capa; 1116 int assoc_failed = 0; 1117 struct wpa_ssid *old_ssid; 1118#ifdef ANDROID_P2P 1119 int freq = 0; 1120#endif 1121 1122#ifdef CONFIG_IBSS_RSN 1123 ibss_rsn_deinit(wpa_s->ibss_rsn); 1124 wpa_s->ibss_rsn = NULL; 1125#endif /* CONFIG_IBSS_RSN */ 1126 1127 if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO || 1128 ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) { 1129#ifdef CONFIG_AP 1130 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) { 1131 wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP " 1132 "mode"); 1133 return; 1134 } 1135 wpa_supplicant_create_ap(wpa_s, ssid); 1136 wpa_s->current_bss = bss; 1137#else /* CONFIG_AP */ 1138 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in " 1139 "the build"); 1140#endif /* CONFIG_AP */ 1141 return; 1142 } 1143 1144#ifdef CONFIG_TDLS 1145 if (bss) 1146 wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1), 1147 bss->ie_len); 1148#endif /* CONFIG_TDLS */ 1149 1150 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) && 1151 ssid->mode == IEEE80211_MODE_INFRA) { 1152 sme_authenticate(wpa_s, bss, ssid); 1153 return; 1154 } 1155 1156 os_memset(¶ms, 0, sizeof(params)); 1157 wpa_s->reassociate = 0; 1158 if (bss && !wpas_driver_bss_selection(wpa_s)) { 1159#ifdef CONFIG_IEEE80211R 1160 const u8 *ie, *md = NULL; 1161#endif /* CONFIG_IEEE80211R */ 1162 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR 1163 " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid), 1164 wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq); 1165 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 1166 os_memset(wpa_s->bssid, 0, ETH_ALEN); 1167 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN); 1168 if (bssid_changed) 1169 wpas_notify_bssid_changed(wpa_s); 1170#ifdef CONFIG_IEEE80211R 1171 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); 1172 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) 1173 md = ie + 2; 1174 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); 1175 if (md) { 1176 /* Prepare for the next transition */ 1177 wpa_ft_prepare_auth_request(wpa_s->wpa, ie); 1178 } 1179#endif /* CONFIG_IEEE80211R */ 1180#ifdef CONFIG_WPS 1181 } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) && 1182 wpa_s->conf->ap_scan == 2 && 1183 (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) { 1184 /* Use ap_scan==1 style network selection to find the network 1185 */ 1186 wpa_s->scan_req = 2; 1187 wpa_s->reassociate = 1; 1188 wpa_supplicant_req_scan(wpa_s, 0, 0); 1189 return; 1190#endif /* CONFIG_WPS */ 1191 } else { 1192 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'", 1193 wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1194 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 1195 } 1196 wpa_supplicant_cancel_sched_scan(wpa_s); 1197 wpa_supplicant_cancel_scan(wpa_s); 1198 1199 /* Starting new association, so clear the possibly used WPA IE from the 1200 * previous association. */ 1201 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 1202 1203#ifdef IEEE8021X_EAPOL 1204 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 1205 if (ssid->leap) { 1206 if (ssid->non_leap == 0) 1207 algs = WPA_AUTH_ALG_LEAP; 1208 else 1209 algs |= WPA_AUTH_ALG_LEAP; 1210 } 1211 } 1212#endif /* IEEE8021X_EAPOL */ 1213 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs); 1214 if (ssid->auth_alg) { 1215 algs = ssid->auth_alg; 1216 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: " 1217 "0x%x", algs); 1218 } 1219 1220 if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) || 1221 wpa_bss_get_ie(bss, WLAN_EID_RSN)) && 1222 wpa_key_mgmt_wpa(ssid->key_mgmt)) { 1223 int try_opportunistic; 1224 try_opportunistic = ssid->proactive_key_caching && 1225 (ssid->proto & WPA_PROTO_RSN); 1226 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, 1227 wpa_s->current_ssid, 1228 try_opportunistic) == 0) 1229 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1); 1230 wpa_ie_len = sizeof(wpa_ie); 1231 if (wpa_supplicant_set_suites(wpa_s, bss, ssid, 1232 wpa_ie, &wpa_ie_len)) { 1233 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA " 1234 "key management and encryption suites"); 1235 return; 1236 } 1237 } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) { 1238 wpa_ie_len = sizeof(wpa_ie); 1239 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, 1240 wpa_ie, &wpa_ie_len)) { 1241 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA " 1242 "key management and encryption suites (no " 1243 "scan results)"); 1244 return; 1245 } 1246#ifdef CONFIG_WPS 1247 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 1248 struct wpabuf *wps_ie; 1249 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); 1250 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) { 1251 wpa_ie_len = wpabuf_len(wps_ie); 1252 os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len); 1253 } else 1254 wpa_ie_len = 0; 1255 wpabuf_free(wps_ie); 1256 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 1257 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY)) 1258 params.wps = WPS_MODE_PRIVACY; 1259 else 1260 params.wps = WPS_MODE_OPEN; 1261 wpa_s->wpa_proto = 0; 1262#endif /* CONFIG_WPS */ 1263 } else { 1264 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 1265 wpa_ie_len = 0; 1266 wpa_s->wpa_proto = 0; 1267 } 1268 1269#ifdef CONFIG_P2P 1270 if (wpa_s->global->p2p) { 1271 u8 *pos; 1272 size_t len; 1273 int res; 1274 int p2p_group; 1275 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE; 1276 pos = wpa_ie + wpa_ie_len; 1277 len = sizeof(wpa_ie) - wpa_ie_len; 1278 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group); 1279 if (res >= 0) 1280 wpa_ie_len += res; 1281 } 1282 1283 wpa_s->cross_connect_disallowed = 0; 1284 if (bss) { 1285 struct wpabuf *p2p; 1286 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE); 1287 if (p2p) { 1288 wpa_s->cross_connect_disallowed = 1289 p2p_get_cross_connect_disallowed(p2p); 1290 wpabuf_free(p2p); 1291 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross " 1292 "connection", 1293 wpa_s->cross_connect_disallowed ? 1294 "disallows" : "allows"); 1295 } 1296 } 1297#endif /* CONFIG_P2P */ 1298 1299#ifdef CONFIG_INTERWORKING 1300 if (wpa_s->conf->interworking) { 1301 u8 *pos = wpa_ie; 1302 if (wpa_ie_len > 0 && pos[0] == WLAN_EID_RSN) 1303 pos += 2 + pos[1]; 1304 os_memmove(pos + 6, pos, wpa_ie_len - (pos - wpa_ie)); 1305 wpa_ie_len += 6; 1306 *pos++ = WLAN_EID_EXT_CAPAB; 1307 *pos++ = 4; 1308 *pos++ = 0x00; 1309 *pos++ = 0x00; 1310 *pos++ = 0x00; 1311 *pos++ = 0x80; /* Bit 31 - Interworking */ 1312 } 1313#endif /* CONFIG_INTERWORKING */ 1314 1315 wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL); 1316 use_crypt = 1; 1317 cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher); 1318 cipher_group = cipher_suite2driver(wpa_s->group_cipher); 1319 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || 1320 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 1321 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) 1322 use_crypt = 0; 1323 if (wpa_set_wep_keys(wpa_s, ssid)) { 1324 use_crypt = 1; 1325 wep_keys_set = 1; 1326 } 1327 } 1328 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) 1329 use_crypt = 0; 1330 1331#ifdef IEEE8021X_EAPOL 1332 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 1333 if ((ssid->eapol_flags & 1334 (EAPOL_FLAG_REQUIRE_KEY_UNICAST | 1335 EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 && 1336 !wep_keys_set) { 1337 use_crypt = 0; 1338 } else { 1339 /* Assume that dynamic WEP-104 keys will be used and 1340 * set cipher suites in order for drivers to expect 1341 * encryption. */ 1342 cipher_pairwise = cipher_group = CIPHER_WEP104; 1343 } 1344 } 1345#endif /* IEEE8021X_EAPOL */ 1346 1347 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { 1348 /* Set the key before (and later after) association */ 1349 wpa_supplicant_set_wpa_none_key(wpa_s, ssid); 1350 } 1351 1352 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); 1353 if (bss) { 1354 params.ssid = bss->ssid; 1355 params.ssid_len = bss->ssid_len; 1356 if (!wpas_driver_bss_selection(wpa_s)) { 1357 params.bssid = bss->bssid; 1358 params.freq = bss->freq; 1359 } 1360 } else { 1361 params.ssid = ssid->ssid; 1362 params.ssid_len = ssid->ssid_len; 1363 } 1364 if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 && 1365 params.freq == 0) 1366 params.freq = ssid->frequency; /* Initial channel for IBSS */ 1367 params.wpa_ie = wpa_ie; 1368 params.wpa_ie_len = wpa_ie_len; 1369 params.pairwise_suite = cipher_pairwise; 1370 params.group_suite = cipher_group; 1371 params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt); 1372 params.wpa_proto = wpa_s->wpa_proto; 1373 params.auth_alg = algs; 1374 params.mode = ssid->mode; 1375 for (i = 0; i < NUM_WEP_KEYS; i++) { 1376 if (ssid->wep_key_len[i]) 1377 params.wep_key[i] = ssid->wep_key[i]; 1378 params.wep_key_len[i] = ssid->wep_key_len[i]; 1379 } 1380 params.wep_tx_keyidx = ssid->wep_tx_keyidx; 1381 1382 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) && 1383 (params.key_mgmt_suite == KEY_MGMT_PSK || 1384 params.key_mgmt_suite == KEY_MGMT_FT_PSK)) { 1385 params.passphrase = ssid->passphrase; 1386 if (ssid->psk_set) 1387 params.psk = ssid->psk; 1388 } 1389 1390 params.drop_unencrypted = use_crypt; 1391 1392#ifdef CONFIG_IEEE80211W 1393 params.mgmt_frame_protection = ssid->ieee80211w; 1394 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) { 1395 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 1396 struct wpa_ie_data ie; 1397 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 && 1398 ie.capabilities & 1399 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { 1400 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports " 1401 "MFP: require MFP"); 1402 params.mgmt_frame_protection = 1403 MGMT_FRAME_PROTECTION_REQUIRED; 1404 } 1405 } 1406#endif /* CONFIG_IEEE80211W */ 1407 1408 params.p2p = ssid->p2p_group; 1409 1410 if (wpa_s->parent->set_sta_uapsd) 1411 params.uapsd = wpa_s->parent->sta_uapsd; 1412 else 1413 params.uapsd = -1; 1414 1415#ifdef ANDROID_P2P 1416 /* If multichannel concurrency is not supported, check for any frequency 1417 * conflict and take appropriate action. 1418 */ 1419 if (((freq = wpa_drv_shared_freq(wpa_s)) > 0) && (freq != params.freq) && 1420 !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT)) { 1421 wpa_printf(MSG_ERROR, "Shared interface with conflicting frequency found (%d != %d)" 1422 , freq, params.freq); 1423 wpas_p2p_handle_frequency_conflicts(wpa_s, params.freq); 1424 } 1425#endif 1426 ret = wpa_drv_associate(wpa_s, ¶ms); 1427 if (ret < 0) { 1428 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver " 1429 "failed"); 1430 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) { 1431 /* 1432 * The driver is known to mean what is saying, so we 1433 * can stop right here; the association will not 1434 * succeed. 1435 */ 1436 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 1437 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 1438 return; 1439 } 1440 /* try to continue anyway; new association will be tried again 1441 * after timeout */ 1442 assoc_failed = 1; 1443 } 1444 1445 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { 1446 /* Set the key after the association just in case association 1447 * cleared the previously configured key. */ 1448 wpa_supplicant_set_wpa_none_key(wpa_s, ssid); 1449 /* No need to timeout authentication since there is no key 1450 * management. */ 1451 wpa_supplicant_cancel_auth_timeout(wpa_s); 1452 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED); 1453#ifdef CONFIG_IBSS_RSN 1454 } else if (ssid->mode == WPAS_MODE_IBSS && 1455 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE && 1456 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) { 1457 /* 1458 * RSN IBSS authentication is per-STA and we can disable the 1459 * per-BSSID authentication. 1460 */ 1461 wpa_supplicant_cancel_auth_timeout(wpa_s); 1462#endif /* CONFIG_IBSS_RSN */ 1463 } else { 1464 /* Timeout for IEEE 802.11 authentication and association */ 1465 int timeout = 60; 1466 1467 if (assoc_failed) { 1468 /* give IBSS a bit more time */ 1469 timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5; 1470 } else if (wpa_s->conf->ap_scan == 1) { 1471 /* give IBSS a bit more time */ 1472 timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10; 1473 } 1474 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0); 1475 } 1476 1477 if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 && 1478 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) { 1479 /* Set static WEP keys again */ 1480 wpa_set_wep_keys(wpa_s, ssid); 1481 } 1482 1483 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) { 1484 /* 1485 * Do not allow EAP session resumption between different 1486 * network configurations. 1487 */ 1488 eapol_sm_invalidate_cached_session(wpa_s->eapol); 1489 } 1490 old_ssid = wpa_s->current_ssid; 1491 wpa_s->current_ssid = ssid; 1492 wpa_s->current_bss = bss; 1493 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); 1494 wpa_supplicant_initiate_eapol(wpa_s); 1495 if (old_ssid != wpa_s->current_ssid) 1496 wpas_notify_network_changed(wpa_s); 1497} 1498 1499 1500static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s, 1501 const u8 *addr) 1502{ 1503 struct wpa_ssid *old_ssid; 1504 1505 wpa_clear_keys(wpa_s, addr); 1506 wpa_supplicant_mark_disassoc(wpa_s); 1507 old_ssid = wpa_s->current_ssid; 1508 wpa_s->current_ssid = NULL; 1509 wpa_s->current_bss = NULL; 1510 wpa_sm_set_config(wpa_s->wpa, NULL); 1511 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); 1512 if (old_ssid != wpa_s->current_ssid) 1513 wpas_notify_network_changed(wpa_s); 1514 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL); 1515} 1516 1517 1518/** 1519 * wpa_supplicant_disassociate - Disassociate the current connection 1520 * @wpa_s: Pointer to wpa_supplicant data 1521 * @reason_code: IEEE 802.11 reason code for the disassociate frame 1522 * 1523 * This function is used to request %wpa_supplicant to disassociate with the 1524 * current AP. 1525 */ 1526void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s, 1527 int reason_code) 1528{ 1529 u8 *addr = NULL; 1530 1531 if (!is_zero_ether_addr(wpa_s->bssid)) { 1532 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code); 1533 addr = wpa_s->bssid; 1534 } 1535 1536 wpa_supplicant_clear_connection(wpa_s, addr); 1537} 1538 1539 1540/** 1541 * wpa_supplicant_deauthenticate - Deauthenticate the current connection 1542 * @wpa_s: Pointer to wpa_supplicant data 1543 * @reason_code: IEEE 802.11 reason code for the deauthenticate frame 1544 * 1545 * This function is used to request %wpa_supplicant to deauthenticate from the 1546 * current AP. 1547 */ 1548void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s, 1549 int reason_code) 1550{ 1551 u8 *addr = NULL; 1552 1553 if (!is_zero_ether_addr(wpa_s->bssid)) { 1554 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid, reason_code); 1555 addr = wpa_s->bssid; 1556 } 1557 1558 wpa_supplicant_clear_connection(wpa_s, addr); 1559} 1560 1561 1562/** 1563 * wpa_supplicant_enable_network - Mark a configured network as enabled 1564 * @wpa_s: wpa_supplicant structure for a network interface 1565 * @ssid: wpa_ssid structure for a configured network or %NULL 1566 * 1567 * Enables the specified network or all networks if no network specified. 1568 */ 1569void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s, 1570 struct wpa_ssid *ssid) 1571{ 1572 struct wpa_ssid *other_ssid; 1573 int was_disabled; 1574 1575 if (ssid == NULL) { 1576 for (other_ssid = wpa_s->conf->ssid; other_ssid; 1577 other_ssid = other_ssid->next) { 1578 if (other_ssid->disabled == 2) 1579 continue; /* do not change persistent P2P group 1580 * data */ 1581 if (other_ssid == wpa_s->current_ssid && 1582 other_ssid->disabled) 1583 wpa_s->reassociate = 1; 1584 1585 was_disabled = other_ssid->disabled; 1586 1587 other_ssid->disabled = 0; 1588 1589 if (was_disabled != other_ssid->disabled) 1590 wpas_notify_network_enabled_changed( 1591 wpa_s, other_ssid); 1592 } 1593 if (wpa_s->reassociate) 1594 wpa_supplicant_req_scan(wpa_s, 0, 0); 1595 } else if (ssid->disabled && ssid->disabled != 2) { 1596 if (wpa_s->current_ssid == NULL) { 1597 /* 1598 * Try to reassociate since there is no current 1599 * configuration and a new network was made available. 1600 */ 1601 wpa_s->reassociate = 1; 1602 wpa_supplicant_req_scan(wpa_s, 0, 0); 1603 } 1604 1605 was_disabled = ssid->disabled; 1606 1607 ssid->disabled = 0; 1608 1609 if (was_disabled != ssid->disabled) 1610 wpas_notify_network_enabled_changed(wpa_s, ssid); 1611 } 1612} 1613 1614 1615/** 1616 * wpa_supplicant_disable_network - Mark a configured network as disabled 1617 * @wpa_s: wpa_supplicant structure for a network interface 1618 * @ssid: wpa_ssid structure for a configured network or %NULL 1619 * 1620 * Disables the specified network or all networks if no network specified. 1621 */ 1622void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s, 1623 struct wpa_ssid *ssid) 1624{ 1625 struct wpa_ssid *other_ssid; 1626 int was_disabled; 1627 1628 if (ssid == NULL) { 1629 for (other_ssid = wpa_s->conf->ssid; other_ssid; 1630 other_ssid = other_ssid->next) { 1631 was_disabled = other_ssid->disabled; 1632 if (was_disabled == 2) 1633 continue; /* do not change persistent P2P group 1634 * data */ 1635 1636 other_ssid->disabled = 1; 1637 1638 if (was_disabled != other_ssid->disabled) 1639 wpas_notify_network_enabled_changed( 1640 wpa_s, other_ssid); 1641 } 1642 if (wpa_s->current_ssid) 1643 wpa_supplicant_disassociate( 1644 wpa_s, WLAN_REASON_DEAUTH_LEAVING); 1645 } else if (ssid->disabled != 2) { 1646 if (ssid == wpa_s->current_ssid) 1647 wpa_supplicant_disassociate( 1648 wpa_s, WLAN_REASON_DEAUTH_LEAVING); 1649 1650 was_disabled = ssid->disabled; 1651 1652 ssid->disabled = 1; 1653 1654 if (was_disabled != ssid->disabled) 1655 wpas_notify_network_enabled_changed(wpa_s, ssid); 1656 } 1657} 1658 1659 1660/** 1661 * wpa_supplicant_select_network - Attempt association with a network 1662 * @wpa_s: wpa_supplicant structure for a network interface 1663 * @ssid: wpa_ssid structure for a configured network or %NULL for any network 1664 */ 1665void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s, 1666 struct wpa_ssid *ssid) 1667{ 1668 1669 struct wpa_ssid *other_ssid; 1670 1671 if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid) 1672 wpa_supplicant_disassociate( 1673 wpa_s, WLAN_REASON_DEAUTH_LEAVING); 1674 1675 /* 1676 * Mark all other networks disabled or mark all networks enabled if no 1677 * network specified. 1678 */ 1679 for (other_ssid = wpa_s->conf->ssid; other_ssid; 1680 other_ssid = other_ssid->next) { 1681 int was_disabled = other_ssid->disabled; 1682 if (was_disabled == 2) 1683 continue; /* do not change persistent P2P group data */ 1684 1685 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0; 1686 1687 if (was_disabled != other_ssid->disabled) 1688 wpas_notify_network_enabled_changed(wpa_s, other_ssid); 1689 } 1690 1691 if (ssid && ssid == wpa_s->current_ssid && wpa_s->current_ssid) { 1692 /* We are already associated with the selected network */ 1693 wpa_printf(MSG_DEBUG, "Already associated with the " 1694 "selected network - do nothing"); 1695 return; 1696 } 1697 1698 wpa_s->connect_without_scan = NULL; 1699 wpa_s->disconnected = 0; 1700 wpa_s->reassociate = 1; 1701 wpa_supplicant_req_scan(wpa_s, 0, 0); 1702 1703 if (ssid) 1704 wpas_notify_network_selected(wpa_s, ssid); 1705} 1706 1707 1708/** 1709 * wpa_supplicant_set_ap_scan - Set AP scan mode for interface 1710 * @wpa_s: wpa_supplicant structure for a network interface 1711 * @ap_scan: AP scan mode 1712 * Returns: 0 if succeed or -1 if ap_scan has an invalid value 1713 * 1714 */ 1715int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan) 1716{ 1717 1718 int old_ap_scan; 1719 1720 if (ap_scan < 0 || ap_scan > 2) 1721 return -1; 1722 1723#ifdef ANDROID 1724 if (ap_scan == 2 && ap_scan != wpa_s->conf->ap_scan && 1725 wpa_s->wpa_state >= WPA_ASSOCIATING && 1726 wpa_s->wpa_state < WPA_COMPLETED) { 1727 wpa_printf(MSG_ERROR, "ap_scan = %d (%d) rejected while " 1728 "associating", wpa_s->conf->ap_scan, ap_scan); 1729 return 0; 1730 } 1731#endif /* ANDROID */ 1732 1733 old_ap_scan = wpa_s->conf->ap_scan; 1734 wpa_s->conf->ap_scan = ap_scan; 1735 1736 if (old_ap_scan != wpa_s->conf->ap_scan) 1737 wpas_notify_ap_scan_changed(wpa_s); 1738 1739 return 0; 1740} 1741 1742 1743/** 1744 * wpa_supplicant_set_bss_expiration_age - Set BSS entry expiration age 1745 * @wpa_s: wpa_supplicant structure for a network interface 1746 * @expire_age: Expiration age in seconds 1747 * Returns: 0 if succeed or -1 if expire_age has an invalid value 1748 * 1749 */ 1750int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s, 1751 unsigned int bss_expire_age) 1752{ 1753 if (bss_expire_age < 10) { 1754 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration age %u", 1755 bss_expire_age); 1756 return -1; 1757 } 1758 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration age: %d sec", 1759 bss_expire_age); 1760 wpa_s->conf->bss_expiration_age = bss_expire_age; 1761 1762 return 0; 1763} 1764 1765 1766/** 1767 * wpa_supplicant_set_bss_expiration_count - Set BSS entry expiration scan count 1768 * @wpa_s: wpa_supplicant structure for a network interface 1769 * @expire_count: number of scans after which an unseen BSS is reclaimed 1770 * Returns: 0 if succeed or -1 if expire_count has an invalid value 1771 * 1772 */ 1773int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s, 1774 unsigned int bss_expire_count) 1775{ 1776 if (bss_expire_count < 1) { 1777 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration count %u", 1778 bss_expire_count); 1779 return -1; 1780 } 1781 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration scan count: %u", 1782 bss_expire_count); 1783 wpa_s->conf->bss_expiration_scan_count = bss_expire_count; 1784 1785 return 0; 1786} 1787 1788 1789/** 1790 * wpa_supplicant_set_debug_params - Set global debug params 1791 * @global: wpa_global structure 1792 * @debug_level: debug level 1793 * @debug_timestamp: determines if show timestamp in debug data 1794 * @debug_show_keys: determines if show keys in debug data 1795 * Returns: 0 if succeed or -1 if debug_level has wrong value 1796 */ 1797int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level, 1798 int debug_timestamp, int debug_show_keys) 1799{ 1800 1801 int old_level, old_timestamp, old_show_keys; 1802 1803 /* check for allowed debuglevels */ 1804 if (debug_level != MSG_EXCESSIVE && 1805 debug_level != MSG_MSGDUMP && 1806 debug_level != MSG_DEBUG && 1807 debug_level != MSG_INFO && 1808 debug_level != MSG_WARNING && 1809 debug_level != MSG_ERROR) 1810 return -1; 1811 1812 old_level = wpa_debug_level; 1813 old_timestamp = wpa_debug_timestamp; 1814 old_show_keys = wpa_debug_show_keys; 1815 1816 wpa_debug_level = debug_level; 1817 wpa_debug_timestamp = debug_timestamp ? 1 : 0; 1818 wpa_debug_show_keys = debug_show_keys ? 1 : 0; 1819 1820 if (wpa_debug_level != old_level) 1821 wpas_notify_debug_level_changed(global); 1822 if (wpa_debug_timestamp != old_timestamp) 1823 wpas_notify_debug_timestamp_changed(global); 1824 if (wpa_debug_show_keys != old_show_keys) 1825 wpas_notify_debug_show_keys_changed(global); 1826 1827 return 0; 1828} 1829 1830 1831/** 1832 * wpa_supplicant_get_ssid - Get a pointer to the current network structure 1833 * @wpa_s: Pointer to wpa_supplicant data 1834 * Returns: A pointer to the current network structure or %NULL on failure 1835 */ 1836struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s) 1837{ 1838 struct wpa_ssid *entry; 1839 u8 ssid[MAX_SSID_LEN]; 1840 int res; 1841 size_t ssid_len; 1842 u8 bssid[ETH_ALEN]; 1843 int wired; 1844 1845 res = wpa_drv_get_ssid(wpa_s, ssid); 1846 if (res < 0) { 1847 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from " 1848 "driver"); 1849 return NULL; 1850 } 1851 ssid_len = res; 1852 1853 if (wpa_drv_get_bssid(wpa_s, bssid) < 0) { 1854 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from " 1855 "driver"); 1856 return NULL; 1857 } 1858 1859 wired = wpa_s->conf->ap_scan == 0 && 1860 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED); 1861 1862 entry = wpa_s->conf->ssid; 1863 while (entry) { 1864 if (!entry->disabled && 1865 ((ssid_len == entry->ssid_len && 1866 os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) && 1867 (!entry->bssid_set || 1868 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)) 1869 return entry; 1870#ifdef CONFIG_WPS 1871 if (!entry->disabled && 1872 (entry->key_mgmt & WPA_KEY_MGMT_WPS) && 1873 (entry->ssid == NULL || entry->ssid_len == 0) && 1874 (!entry->bssid_set || 1875 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)) 1876 return entry; 1877#endif /* CONFIG_WPS */ 1878 1879 if (!entry->disabled && entry->bssid_set && 1880 entry->ssid_len == 0 && 1881 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0) 1882 return entry; 1883 1884 entry = entry->next; 1885 } 1886 1887 return NULL; 1888} 1889 1890 1891static int select_driver(struct wpa_supplicant *wpa_s, int i) 1892{ 1893 struct wpa_global *global = wpa_s->global; 1894 1895 if (wpa_drivers[i]->global_init && global->drv_priv[i] == NULL) { 1896 global->drv_priv[i] = wpa_drivers[i]->global_init(); 1897 if (global->drv_priv[i] == NULL) { 1898 wpa_printf(MSG_ERROR, "Failed to initialize driver " 1899 "'%s'", wpa_drivers[i]->name); 1900 return -1; 1901 } 1902 } 1903 1904 wpa_s->driver = wpa_drivers[i]; 1905 wpa_s->global_drv_priv = global->drv_priv[i]; 1906 1907 return 0; 1908} 1909 1910 1911static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s, 1912 const char *name) 1913{ 1914 int i; 1915 size_t len; 1916 const char *pos, *driver = name; 1917 1918 if (wpa_s == NULL) 1919 return -1; 1920 1921 if (wpa_drivers[0] == NULL) { 1922 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into " 1923 "wpa_supplicant"); 1924 return -1; 1925 } 1926 1927 if (name == NULL) { 1928 /* default to first driver in the list */ 1929 return select_driver(wpa_s, 0); 1930 } 1931 1932 do { 1933 pos = os_strchr(driver, ','); 1934 if (pos) 1935 len = pos - driver; 1936 else 1937 len = os_strlen(driver); 1938 1939 for (i = 0; wpa_drivers[i]; i++) { 1940 if (os_strlen(wpa_drivers[i]->name) == len && 1941 os_strncmp(driver, wpa_drivers[i]->name, len) == 1942 0) 1943 return select_driver(wpa_s, i); 1944 } 1945 1946 driver = pos + 1; 1947 } while (pos); 1948 1949 wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name); 1950 return -1; 1951} 1952 1953 1954/** 1955 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant 1956 * @ctx: Context pointer (wpa_s); this is the ctx variable registered 1957 * with struct wpa_driver_ops::init() 1958 * @src_addr: Source address of the EAPOL frame 1959 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header) 1960 * @len: Length of the EAPOL data 1961 * 1962 * This function is called for each received EAPOL frame. Most driver 1963 * interfaces rely on more generic OS mechanism for receiving frames through 1964 * l2_packet, but if such a mechanism is not available, the driver wrapper may 1965 * take care of received EAPOL frames and deliver them to the core supplicant 1966 * code by calling this function. 1967 */ 1968void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr, 1969 const u8 *buf, size_t len) 1970{ 1971 struct wpa_supplicant *wpa_s = ctx; 1972 1973 wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr)); 1974 wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len); 1975 1976 if (wpa_s->wpa_state < WPA_ASSOCIATED) { 1977 /* 1978 * There is possible race condition between receiving the 1979 * association event and the EAPOL frame since they are coming 1980 * through different paths from the driver. In order to avoid 1981 * issues in trying to process the EAPOL frame before receiving 1982 * association information, lets queue it for processing until 1983 * the association event is received. 1984 */ 1985 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing " 1986 "of received EAPOL frame"); 1987 wpabuf_free(wpa_s->pending_eapol_rx); 1988 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len); 1989 if (wpa_s->pending_eapol_rx) { 1990 os_get_time(&wpa_s->pending_eapol_rx_time); 1991 os_memcpy(wpa_s->pending_eapol_rx_src, src_addr, 1992 ETH_ALEN); 1993 } 1994 return; 1995 } 1996 1997#ifdef CONFIG_AP 1998 if (wpa_s->ap_iface) { 1999 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len); 2000 return; 2001 } 2002#endif /* CONFIG_AP */ 2003 2004 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) { 2005 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since " 2006 "no key management is configured"); 2007 return; 2008 } 2009 2010 if (wpa_s->eapol_received == 0 && 2011 (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) || 2012 !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || 2013 wpa_s->wpa_state != WPA_COMPLETED) && 2014 (wpa_s->current_ssid == NULL || 2015 wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) { 2016 /* Timeout for completing IEEE 802.1X and WPA authentication */ 2017 wpa_supplicant_req_auth_timeout( 2018 wpa_s, 2019 (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) || 2020 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA || 2021 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ? 2022 70 : 10, 0); 2023 } 2024 wpa_s->eapol_received++; 2025 2026 if (wpa_s->countermeasures) { 2027 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped " 2028 "EAPOL packet"); 2029 return; 2030 } 2031 2032#ifdef CONFIG_IBSS_RSN 2033 if (wpa_s->current_ssid && 2034 wpa_s->current_ssid->mode == WPAS_MODE_IBSS) { 2035 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len); 2036 return; 2037 } 2038#endif /* CONFIG_IBSS_RSN */ 2039 2040 /* Source address of the incoming EAPOL frame could be compared to the 2041 * current BSSID. However, it is possible that a centralized 2042 * Authenticator could be using another MAC address than the BSSID of 2043 * an AP, so just allow any address to be used for now. The replies are 2044 * still sent to the current BSSID (if available), though. */ 2045 2046 os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN); 2047 if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) && 2048 eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0) 2049 return; 2050 wpa_drv_poll(wpa_s); 2051 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE)) 2052 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len); 2053 else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) { 2054 /* 2055 * Set portValid = TRUE here since we are going to skip 4-way 2056 * handshake processing which would normally set portValid. We 2057 * need this to allow the EAPOL state machines to be completed 2058 * without going through EAPOL-Key handshake. 2059 */ 2060 eapol_sm_notify_portValid(wpa_s->eapol, TRUE); 2061 } 2062} 2063 2064 2065int wpa_supplicant_update_mac_addr(struct wpa_supplicant *wpa_s) 2066{ 2067 if (wpa_s->driver->send_eapol) { 2068 const u8 *addr = wpa_drv_get_mac_addr(wpa_s); 2069 if (addr) 2070 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN); 2071 } else if (!(wpa_s->drv_flags & 2072 WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) { 2073 l2_packet_deinit(wpa_s->l2); 2074 wpa_s->l2 = l2_packet_init(wpa_s->ifname, 2075 wpa_drv_get_mac_addr(wpa_s), 2076 ETH_P_EAPOL, 2077 wpa_supplicant_rx_eapol, wpa_s, 0); 2078 if (wpa_s->l2 == NULL) 2079 return -1; 2080 } else { 2081 const u8 *addr = wpa_drv_get_mac_addr(wpa_s); 2082 if (addr) 2083 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN); 2084 } 2085 2086 if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) { 2087 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address"); 2088 return -1; 2089 } 2090 2091 wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR, 2092 MAC2STR(wpa_s->own_addr)); 2093 wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr); 2094 2095 return 0; 2096} 2097 2098 2099/** 2100 * wpa_supplicant_driver_init - Initialize driver interface parameters 2101 * @wpa_s: Pointer to wpa_supplicant data 2102 * Returns: 0 on success, -1 on failure 2103 * 2104 * This function is called to initialize driver interface parameters. 2105 * wpa_drv_init() must have been called before this function to initialize the 2106 * driver interface. 2107 */ 2108int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s) 2109{ 2110 static int interface_count = 0; 2111 2112 if (wpa_supplicant_update_mac_addr(wpa_s) < 0) 2113 return -1; 2114 2115 if (wpa_s->bridge_ifname[0]) { 2116 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge " 2117 "interface '%s'", wpa_s->bridge_ifname); 2118 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname, 2119 wpa_s->own_addr, 2120 ETH_P_EAPOL, 2121 wpa_supplicant_rx_eapol, wpa_s, 2122 0); 2123 if (wpa_s->l2_br == NULL) { 2124 wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet " 2125 "connection for the bridge interface '%s'", 2126 wpa_s->bridge_ifname); 2127 return -1; 2128 } 2129 } 2130 2131 wpa_clear_keys(wpa_s, NULL); 2132 2133 /* Make sure that TKIP countermeasures are not left enabled (could 2134 * happen if wpa_supplicant is killed during countermeasures. */ 2135 wpa_drv_set_countermeasures(wpa_s, 0); 2136 2137 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver"); 2138 wpa_drv_flush_pmkid(wpa_s); 2139 2140 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 2141 if (wpa_supplicant_enabled_networks(wpa_s->conf)) { 2142 if (wpa_supplicant_delayed_sched_scan(wpa_s, interface_count, 2143 100000)) 2144 wpa_supplicant_req_scan(wpa_s, interface_count, 2145 100000); 2146 interface_count++; 2147 } else 2148 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); 2149 2150 return 0; 2151} 2152 2153 2154static int wpa_supplicant_daemon(const char *pid_file) 2155{ 2156 wpa_printf(MSG_DEBUG, "Daemonize.."); 2157 return os_daemonize(pid_file); 2158} 2159 2160 2161static struct wpa_supplicant * wpa_supplicant_alloc(void) 2162{ 2163 struct wpa_supplicant *wpa_s; 2164 2165 wpa_s = os_zalloc(sizeof(*wpa_s)); 2166 if (wpa_s == NULL) 2167 return NULL; 2168 wpa_s->scan_req = 1; 2169 wpa_s->scan_interval = 5; 2170 wpa_s->new_connection = 1; 2171 wpa_s->parent = wpa_s; 2172 wpa_s->sched_scanning = 0; 2173 2174 return wpa_s; 2175} 2176 2177 2178static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s, 2179 struct wpa_interface *iface) 2180{ 2181 const char *ifname, *driver; 2182 struct wpa_driver_capa capa; 2183 2184 wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver " 2185 "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname, 2186 iface->confname ? iface->confname : "N/A", 2187 iface->driver ? iface->driver : "default", 2188 iface->ctrl_interface ? iface->ctrl_interface : "N/A", 2189 iface->bridge_ifname ? iface->bridge_ifname : "N/A"); 2190 2191 if (iface->confname) { 2192#ifdef CONFIG_BACKEND_FILE 2193 wpa_s->confname = os_rel2abs_path(iface->confname); 2194 if (wpa_s->confname == NULL) { 2195 wpa_printf(MSG_ERROR, "Failed to get absolute path " 2196 "for configuration file '%s'.", 2197 iface->confname); 2198 return -1; 2199 } 2200 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'", 2201 iface->confname, wpa_s->confname); 2202#else /* CONFIG_BACKEND_FILE */ 2203 wpa_s->confname = os_strdup(iface->confname); 2204#endif /* CONFIG_BACKEND_FILE */ 2205 wpa_s->conf = wpa_config_read(wpa_s->confname); 2206 if (wpa_s->conf == NULL) { 2207 wpa_printf(MSG_ERROR, "Failed to read or parse " 2208 "configuration '%s'.", wpa_s->confname); 2209 return -1; 2210 } 2211 2212 /* 2213 * Override ctrl_interface and driver_param if set on command 2214 * line. 2215 */ 2216 if (iface->ctrl_interface) { 2217 os_free(wpa_s->conf->ctrl_interface); 2218 wpa_s->conf->ctrl_interface = 2219 os_strdup(iface->ctrl_interface); 2220 } 2221 2222 if (iface->driver_param) { 2223 os_free(wpa_s->conf->driver_param); 2224 wpa_s->conf->driver_param = 2225 os_strdup(iface->driver_param); 2226 } 2227 } else 2228 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface, 2229 iface->driver_param); 2230 2231 if (wpa_s->conf == NULL) { 2232 wpa_printf(MSG_ERROR, "\nNo configuration found."); 2233 return -1; 2234 } 2235 2236 if (iface->ifname == NULL) { 2237 wpa_printf(MSG_ERROR, "\nInterface name is required."); 2238 return -1; 2239 } 2240 if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) { 2241 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.", 2242 iface->ifname); 2243 return -1; 2244 } 2245 os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname)); 2246 2247 if (iface->bridge_ifname) { 2248 if (os_strlen(iface->bridge_ifname) >= 2249 sizeof(wpa_s->bridge_ifname)) { 2250 wpa_printf(MSG_ERROR, "\nToo long bridge interface " 2251 "name '%s'.", iface->bridge_ifname); 2252 return -1; 2253 } 2254 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname, 2255 sizeof(wpa_s->bridge_ifname)); 2256 } 2257 2258 /* RSNA Supplicant Key Management - INITIALIZE */ 2259 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE); 2260 eapol_sm_notify_portValid(wpa_s->eapol, FALSE); 2261 2262 /* Initialize driver interface and register driver event handler before 2263 * L2 receive handler so that association events are processed before 2264 * EAPOL-Key packets if both become available for the same select() 2265 * call. */ 2266 driver = iface->driver; 2267next_driver: 2268 if (wpa_supplicant_set_driver(wpa_s, driver) < 0) 2269 return -1; 2270 2271 wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname); 2272 if (wpa_s->drv_priv == NULL) { 2273 const char *pos; 2274 pos = driver ? os_strchr(driver, ',') : NULL; 2275 if (pos) { 2276 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize " 2277 "driver interface - try next driver wrapper"); 2278 driver = pos + 1; 2279 goto next_driver; 2280 } 2281 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver " 2282 "interface"); 2283 return -1; 2284 } 2285 if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) { 2286 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected " 2287 "driver_param '%s'", wpa_s->conf->driver_param); 2288 return -1; 2289 } 2290 2291 ifname = wpa_drv_get_ifname(wpa_s); 2292 if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) { 2293 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced " 2294 "interface name with '%s'", ifname); 2295 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname)); 2296 } 2297 2298 if (wpa_supplicant_init_wpa(wpa_s) < 0) 2299 return -1; 2300 2301 wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname, 2302 wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname : 2303 NULL); 2304 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth); 2305 2306 if (wpa_s->conf->dot11RSNAConfigPMKLifetime && 2307 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME, 2308 wpa_s->conf->dot11RSNAConfigPMKLifetime)) { 2309 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for " 2310 "dot11RSNAConfigPMKLifetime"); 2311 return -1; 2312 } 2313 2314 if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold && 2315 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD, 2316 wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) { 2317 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for " 2318 "dot11RSNAConfigPMKReauthThreshold"); 2319 return -1; 2320 } 2321 2322 if (wpa_s->conf->dot11RSNAConfigSATimeout && 2323 wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT, 2324 wpa_s->conf->dot11RSNAConfigSATimeout)) { 2325 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for " 2326 "dot11RSNAConfigSATimeout"); 2327 return -1; 2328 } 2329 2330 wpa_s->hw.modes = wpa_drv_get_hw_feature_data(wpa_s, 2331 &wpa_s->hw.num_modes, 2332 &wpa_s->hw.flags); 2333 2334 if (wpa_drv_get_capa(wpa_s, &capa) == 0) { 2335 wpa_s->drv_capa_known = 1; 2336 wpa_s->drv_flags = capa.flags; 2337 wpa_s->probe_resp_offloads = capa.probe_resp_offloads; 2338 wpa_s->max_scan_ssids = capa.max_scan_ssids; 2339 wpa_s->max_sched_scan_ssids = capa.max_sched_scan_ssids; 2340 wpa_s->sched_scan_supported = capa.sched_scan_supported; 2341 wpa_s->max_match_sets = capa.max_match_sets; 2342 wpa_s->max_remain_on_chan = capa.max_remain_on_chan; 2343 wpa_s->max_stations = capa.max_stations; 2344 } 2345 if (wpa_s->max_remain_on_chan == 0) 2346 wpa_s->max_remain_on_chan = 1000; 2347 2348 if (wpa_supplicant_driver_init(wpa_s) < 0) 2349 return -1; 2350 2351#ifdef CONFIG_TDLS 2352 if (wpa_tdls_init(wpa_s->wpa)) 2353 return -1; 2354#endif /* CONFIG_TDLS */ 2355 2356 if (wpa_s->conf->country[0] && wpa_s->conf->country[1] && 2357 wpa_drv_set_country(wpa_s, wpa_s->conf->country)) { 2358 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country"); 2359 return -1; 2360 } 2361 2362 if (wpas_wps_init(wpa_s)) 2363 return -1; 2364 2365 if (wpa_supplicant_init_eapol(wpa_s) < 0) 2366 return -1; 2367 wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol); 2368 2369 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s); 2370 if (wpa_s->ctrl_iface == NULL) { 2371 wpa_printf(MSG_ERROR, 2372 "Failed to initialize control interface '%s'.\n" 2373 "You may have another wpa_supplicant process " 2374 "already running or the file was\n" 2375 "left by an unclean termination of wpa_supplicant " 2376 "in which case you will need\n" 2377 "to manually remove this file before starting " 2378 "wpa_supplicant again.\n", 2379 wpa_s->conf->ctrl_interface); 2380 return -1; 2381 } 2382 2383 wpa_s->gas = gas_query_init(wpa_s); 2384 if (wpa_s->gas == NULL) { 2385 wpa_printf(MSG_ERROR, "Failed to initialize GAS query"); 2386 return -1; 2387 } 2388 2389#ifdef CONFIG_P2P 2390 if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) { 2391 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P"); 2392 return -1; 2393 } 2394#endif /* CONFIG_P2P */ 2395 2396 if (wpa_bss_init(wpa_s) < 0) 2397 return -1; 2398 2399 return 0; 2400} 2401 2402 2403static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s, 2404 int notify, int terminate) 2405{ 2406 if (wpa_s->drv_priv) { 2407 wpa_supplicant_deauthenticate(wpa_s, 2408 WLAN_REASON_DEAUTH_LEAVING); 2409 2410 wpa_drv_set_countermeasures(wpa_s, 0); 2411 wpa_clear_keys(wpa_s, NULL); 2412 } 2413 2414 wpa_supplicant_cleanup(wpa_s); 2415 2416 if (wpa_s->drv_priv) 2417 wpa_drv_deinit(wpa_s); 2418 2419 if (notify) 2420 wpas_notify_iface_removed(wpa_s); 2421 2422/** 2423 * The wpa_drv_deinit call after sending TERMINATING to the framework causes 2424 * race condition with the start of hostapd. 2425 * This has been moved out of wpa_supplicant_cleanup(). Send the control 2426 * message and free config after the deinit. 2427 */ 2428 if (terminate) 2429 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING); 2430 2431 if (wpa_s->ctrl_iface) { 2432 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface); 2433 wpa_s->ctrl_iface = NULL; 2434 } 2435 2436 if (wpa_s->conf != NULL) { 2437 wpa_config_free(wpa_s->conf); 2438 wpa_s->conf = NULL; 2439 } 2440} 2441 2442 2443/** 2444 * wpa_supplicant_add_iface - Add a new network interface 2445 * @global: Pointer to global data from wpa_supplicant_init() 2446 * @iface: Interface configuration options 2447 * Returns: Pointer to the created interface or %NULL on failure 2448 * 2449 * This function is used to add new network interfaces for %wpa_supplicant. 2450 * This can be called before wpa_supplicant_run() to add interfaces before the 2451 * main event loop has been started. In addition, new interfaces can be added 2452 * dynamically while %wpa_supplicant is already running. This could happen, 2453 * e.g., when a hotplug network adapter is inserted. 2454 */ 2455struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global, 2456 struct wpa_interface *iface) 2457{ 2458 struct wpa_supplicant *wpa_s; 2459 struct wpa_interface t_iface; 2460 struct wpa_ssid *ssid; 2461 2462 if (global == NULL || iface == NULL) 2463 return NULL; 2464 2465 wpa_s = wpa_supplicant_alloc(); 2466 if (wpa_s == NULL) 2467 return NULL; 2468 2469 wpa_s->global = global; 2470 2471 t_iface = *iface; 2472 if (global->params.override_driver) { 2473 wpa_printf(MSG_DEBUG, "Override interface parameter: driver " 2474 "('%s' -> '%s')", 2475 iface->driver, global->params.override_driver); 2476 t_iface.driver = global->params.override_driver; 2477 } 2478 if (global->params.override_ctrl_interface) { 2479 wpa_printf(MSG_DEBUG, "Override interface parameter: " 2480 "ctrl_interface ('%s' -> '%s')", 2481 iface->ctrl_interface, 2482 global->params.override_ctrl_interface); 2483 t_iface.ctrl_interface = 2484 global->params.override_ctrl_interface; 2485 } 2486 if (wpa_supplicant_init_iface(wpa_s, &t_iface)) { 2487 wpa_printf(MSG_DEBUG, "Failed to add interface %s", 2488 iface->ifname); 2489 wpa_supplicant_deinit_iface(wpa_s, 0, 0); 2490 os_free(wpa_s); 2491 return NULL; 2492 } 2493 2494 /* Notify the control interfaces about new iface */ 2495 if (wpas_notify_iface_added(wpa_s)) { 2496 wpa_supplicant_deinit_iface(wpa_s, 1, 0); 2497 os_free(wpa_s); 2498 return NULL; 2499 } 2500 2501 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) 2502 wpas_notify_network_added(wpa_s, ssid); 2503 2504 wpa_s->next = global->ifaces; 2505 global->ifaces = wpa_s; 2506 2507 wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname); 2508 2509 return wpa_s; 2510} 2511 2512 2513/** 2514 * wpa_supplicant_remove_iface - Remove a network interface 2515 * @global: Pointer to global data from wpa_supplicant_init() 2516 * @wpa_s: Pointer to the network interface to be removed 2517 * Returns: 0 if interface was removed, -1 if interface was not found 2518 * 2519 * This function can be used to dynamically remove network interfaces from 2520 * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In 2521 * addition, this function is used to remove all remaining interfaces when 2522 * %wpa_supplicant is terminated. 2523 */ 2524int wpa_supplicant_remove_iface(struct wpa_global *global, 2525 struct wpa_supplicant *wpa_s, 2526 int terminate) 2527{ 2528 struct wpa_supplicant *prev; 2529 2530 /* Remove interface from the global list of interfaces */ 2531 prev = global->ifaces; 2532 if (prev == wpa_s) { 2533 global->ifaces = wpa_s->next; 2534 } else { 2535 while (prev && prev->next != wpa_s) 2536 prev = prev->next; 2537 if (prev == NULL) 2538 return -1; 2539 prev->next = wpa_s->next; 2540 } 2541 2542 wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname); 2543 2544 if (global->p2p_group_formation == wpa_s) 2545 global->p2p_group_formation = NULL; 2546 wpa_supplicant_deinit_iface(wpa_s, 1, terminate); 2547 os_free(wpa_s); 2548 2549 return 0; 2550} 2551 2552 2553/** 2554 * wpa_supplicant_get_eap_mode - Get the current EAP mode 2555 * @wpa_s: Pointer to the network interface 2556 * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found 2557 */ 2558const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s) 2559{ 2560 const char *eapol_method; 2561 2562 if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 && 2563 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 2564 return "NO-EAP"; 2565 } 2566 2567 eapol_method = eapol_sm_get_method_name(wpa_s->eapol); 2568 if (eapol_method == NULL) 2569 return "UNKNOWN-EAP"; 2570 2571 return eapol_method; 2572} 2573 2574 2575/** 2576 * wpa_supplicant_get_iface - Get a new network interface 2577 * @global: Pointer to global data from wpa_supplicant_init() 2578 * @ifname: Interface name 2579 * Returns: Pointer to the interface or %NULL if not found 2580 */ 2581struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global, 2582 const char *ifname) 2583{ 2584 struct wpa_supplicant *wpa_s; 2585 2586 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { 2587 if (os_strcmp(wpa_s->ifname, ifname) == 0) 2588 return wpa_s; 2589 } 2590 return NULL; 2591} 2592 2593 2594#ifndef CONFIG_NO_WPA_MSG 2595static const char * wpa_supplicant_msg_ifname_cb(void *ctx) 2596{ 2597 struct wpa_supplicant *wpa_s = ctx; 2598 if (wpa_s == NULL) 2599 return NULL; 2600 return wpa_s->ifname; 2601} 2602#endif /* CONFIG_NO_WPA_MSG */ 2603 2604 2605/** 2606 * wpa_supplicant_init - Initialize %wpa_supplicant 2607 * @params: Parameters for %wpa_supplicant 2608 * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure 2609 * 2610 * This function is used to initialize %wpa_supplicant. After successful 2611 * initialization, the returned data pointer can be used to add and remove 2612 * network interfaces, and eventually, to deinitialize %wpa_supplicant. 2613 */ 2614struct wpa_global * wpa_supplicant_init(struct wpa_params *params) 2615{ 2616 struct wpa_global *global; 2617 int ret, i; 2618 2619 if (params == NULL) 2620 return NULL; 2621 2622#ifdef CONFIG_DRIVER_NDIS 2623 { 2624 void driver_ndis_init_ops(void); 2625 driver_ndis_init_ops(); 2626 } 2627#endif /* CONFIG_DRIVER_NDIS */ 2628 2629#ifndef CONFIG_NO_WPA_MSG 2630 wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb); 2631#endif /* CONFIG_NO_WPA_MSG */ 2632 2633 wpa_debug_open_file(params->wpa_debug_file_path); 2634 if (params->wpa_debug_syslog) 2635 wpa_debug_open_syslog(); 2636 2637 ret = eap_register_methods(); 2638 if (ret) { 2639 wpa_printf(MSG_ERROR, "Failed to register EAP methods"); 2640 if (ret == -2) 2641 wpa_printf(MSG_ERROR, "Two or more EAP methods used " 2642 "the same EAP type."); 2643 return NULL; 2644 } 2645 2646 global = os_zalloc(sizeof(*global)); 2647 if (global == NULL) 2648 return NULL; 2649 dl_list_init(&global->p2p_srv_bonjour); 2650 dl_list_init(&global->p2p_srv_upnp); 2651 global->params.daemonize = params->daemonize; 2652 global->params.wait_for_monitor = params->wait_for_monitor; 2653 global->params.dbus_ctrl_interface = params->dbus_ctrl_interface; 2654 if (params->pid_file) 2655 global->params.pid_file = os_strdup(params->pid_file); 2656 if (params->ctrl_interface) 2657 global->params.ctrl_interface = 2658 os_strdup(params->ctrl_interface); 2659 if (params->override_driver) 2660 global->params.override_driver = 2661 os_strdup(params->override_driver); 2662 if (params->override_ctrl_interface) 2663 global->params.override_ctrl_interface = 2664 os_strdup(params->override_ctrl_interface); 2665 wpa_debug_level = global->params.wpa_debug_level = 2666 params->wpa_debug_level; 2667 wpa_debug_show_keys = global->params.wpa_debug_show_keys = 2668 params->wpa_debug_show_keys; 2669 wpa_debug_timestamp = global->params.wpa_debug_timestamp = 2670 params->wpa_debug_timestamp; 2671 2672 wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR); 2673 2674 if (eloop_init()) { 2675 wpa_printf(MSG_ERROR, "Failed to initialize event loop"); 2676 wpa_supplicant_deinit(global); 2677 return NULL; 2678 } 2679 2680 random_init(params->entropy_file); 2681 2682 global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global); 2683 if (global->ctrl_iface == NULL) { 2684 wpa_supplicant_deinit(global); 2685 return NULL; 2686 } 2687 2688 if (wpas_notify_supplicant_initialized(global)) { 2689 wpa_supplicant_deinit(global); 2690 return NULL; 2691 } 2692 2693 for (i = 0; wpa_drivers[i]; i++) 2694 global->drv_count++; 2695 if (global->drv_count == 0) { 2696 wpa_printf(MSG_ERROR, "No drivers enabled"); 2697 wpa_supplicant_deinit(global); 2698 return NULL; 2699 } 2700 global->drv_priv = os_zalloc(global->drv_count * sizeof(void *)); 2701 if (global->drv_priv == NULL) { 2702 wpa_supplicant_deinit(global); 2703 return NULL; 2704 } 2705 2706 return global; 2707} 2708 2709 2710/** 2711 * wpa_supplicant_run - Run the %wpa_supplicant main event loop 2712 * @global: Pointer to global data from wpa_supplicant_init() 2713 * Returns: 0 after successful event loop run, -1 on failure 2714 * 2715 * This function starts the main event loop and continues running as long as 2716 * there are any remaining events. In most cases, this function is running as 2717 * long as the %wpa_supplicant process in still in use. 2718 */ 2719int wpa_supplicant_run(struct wpa_global *global) 2720{ 2721 struct wpa_supplicant *wpa_s; 2722 2723 if (global->params.daemonize && 2724 wpa_supplicant_daemon(global->params.pid_file)) 2725 return -1; 2726 2727 if (global->params.wait_for_monitor) { 2728 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) 2729 if (wpa_s->ctrl_iface) 2730 wpa_supplicant_ctrl_iface_wait( 2731 wpa_s->ctrl_iface); 2732 } 2733 2734 eloop_register_signal_terminate(wpa_supplicant_terminate, global); 2735 eloop_register_signal_reconfig(wpa_supplicant_reconfig, global); 2736 2737 eloop_run(); 2738 2739 return 0; 2740} 2741 2742 2743/** 2744 * wpa_supplicant_deinit - Deinitialize %wpa_supplicant 2745 * @global: Pointer to global data from wpa_supplicant_init() 2746 * 2747 * This function is called to deinitialize %wpa_supplicant and to free all 2748 * allocated resources. Remaining network interfaces will also be removed. 2749 */ 2750void wpa_supplicant_deinit(struct wpa_global *global) 2751{ 2752 int i; 2753 2754 if (global == NULL) 2755 return; 2756 2757#ifdef CONFIG_P2P 2758 wpas_p2p_deinit_global(global); 2759#endif /* CONFIG_P2P */ 2760 2761 while (global->ifaces) 2762 wpa_supplicant_remove_iface(global, global->ifaces, 1); 2763 2764 if (global->ctrl_iface) 2765 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface); 2766 2767 wpas_notify_supplicant_deinitialized(global); 2768 2769 eap_peer_unregister_methods(); 2770#ifdef CONFIG_AP 2771 eap_server_unregister_methods(); 2772#endif /* CONFIG_AP */ 2773 2774 for (i = 0; wpa_drivers[i] && global->drv_priv; i++) { 2775 if (!global->drv_priv[i]) 2776 continue; 2777 wpa_drivers[i]->global_deinit(global->drv_priv[i]); 2778 } 2779 os_free(global->drv_priv); 2780 2781 random_deinit(); 2782 2783 eloop_destroy(); 2784 2785 if (global->params.pid_file) { 2786 os_daemonize_terminate(global->params.pid_file); 2787 os_free(global->params.pid_file); 2788 } 2789 os_free(global->params.ctrl_interface); 2790 os_free(global->params.override_driver); 2791 os_free(global->params.override_ctrl_interface); 2792 2793 os_free(global); 2794 wpa_debug_close_syslog(); 2795 wpa_debug_close_file(); 2796} 2797 2798 2799void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s) 2800{ 2801 if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) && 2802 wpa_s->conf->country[0] && wpa_s->conf->country[1]) { 2803 char country[3]; 2804 country[0] = wpa_s->conf->country[0]; 2805 country[1] = wpa_s->conf->country[1]; 2806 country[2] = '\0'; 2807 if (wpa_drv_set_country(wpa_s, country) < 0) { 2808 wpa_printf(MSG_ERROR, "Failed to set country code " 2809 "'%s'", country); 2810 } 2811 } 2812 2813#ifdef CONFIG_WPS 2814 wpas_wps_update_config(wpa_s); 2815#endif /* CONFIG_WPS */ 2816 2817#ifdef CONFIG_P2P 2818 wpas_p2p_update_config(wpa_s); 2819#endif /* CONFIG_P2P */ 2820 2821 wpa_s->conf->changed_parameters = 0; 2822} 2823 2824 2825static void add_freq(int *freqs, int *num_freqs, int freq) 2826{ 2827 int i; 2828 2829 for (i = 0; i < *num_freqs; i++) { 2830 if (freqs[i] == freq) 2831 return; 2832 } 2833 2834 freqs[*num_freqs] = freq; 2835 (*num_freqs)++; 2836} 2837 2838 2839static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s) 2840{ 2841 struct wpa_bss *bss, *cbss; 2842 const int max_freqs = 10; 2843 int *freqs; 2844 int num_freqs = 0; 2845 2846 freqs = os_zalloc(sizeof(int) * (max_freqs + 1)); 2847 if (freqs == NULL) 2848 return NULL; 2849 2850 cbss = wpa_s->current_bss; 2851 2852 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2853 if (bss == cbss) 2854 continue; 2855 if (bss->ssid_len == cbss->ssid_len && 2856 os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 && 2857 wpa_blacklist_get(wpa_s, bss->bssid) == NULL) { 2858 add_freq(freqs, &num_freqs, bss->freq); 2859 if (num_freqs == max_freqs) 2860 break; 2861 } 2862 } 2863 2864 if (num_freqs == 0) { 2865 os_free(freqs); 2866 freqs = NULL; 2867 } 2868 2869 return freqs; 2870} 2871 2872 2873void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid) 2874{ 2875 int timeout; 2876 int count; 2877 int *freqs = NULL; 2878 2879 /* 2880 * Add the failed BSSID into the blacklist and speed up next scan 2881 * attempt if there could be other APs that could accept association. 2882 * The current blacklist count indicates how many times we have tried 2883 * connecting to this AP and multiple attempts mean that other APs are 2884 * either not available or has already been tried, so that we can start 2885 * increasing the delay here to avoid constant scanning. 2886 */ 2887 count = wpa_blacklist_add(wpa_s, bssid); 2888 if (count == 1 && wpa_s->current_bss) { 2889 /* 2890 * This BSS was not in the blacklist before. If there is 2891 * another BSS available for the same ESS, we should try that 2892 * next. Otherwise, we may as well try this one once more 2893 * before allowing other, likely worse, ESSes to be considered. 2894 */ 2895 freqs = get_bss_freqs_in_ess(wpa_s); 2896 if (freqs) { 2897 wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS " 2898 "has been seen; try it next"); 2899 wpa_blacklist_add(wpa_s, bssid); 2900 /* 2901 * On the next scan, go through only the known channels 2902 * used in this ESS based on previous scans to speed up 2903 * common load balancing use case. 2904 */ 2905 os_free(wpa_s->next_scan_freqs); 2906 wpa_s->next_scan_freqs = freqs; 2907 } 2908 } 2909 2910 switch (count) { 2911 case 1: 2912 timeout = 100; 2913 break; 2914 case 2: 2915 timeout = 500; 2916 break; 2917 case 3: 2918 timeout = 1000; 2919 break; 2920 default: 2921 timeout = 5000; 2922 } 2923 2924 /* 2925 * TODO: if more than one possible AP is available in scan results, 2926 * could try the other ones before requesting a new scan. 2927 */ 2928 wpa_supplicant_req_scan(wpa_s, timeout / 1000, 2929 1000 * (timeout % 1000)); 2930} 2931 2932 2933int wpas_driver_bss_selection(struct wpa_supplicant *wpa_s) 2934{ 2935 return wpa_s->conf->ap_scan == 2 || 2936 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION); 2937} 2938