wpa_supplicant.c revision 114c3866dda61e84385bb5327f0acf727f2156da
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 "eapol_supp/eapol_supp_sm.h" 24#include "eap_peer/eap.h" 25#include "eap_server/eap_methods.h" 26#include "rsn_supp/wpa.h" 27#include "eloop.h" 28#include "config.h" 29#include "l2_packet/l2_packet.h" 30#include "wpa_supplicant_i.h" 31#include "driver_i.h" 32#include "ctrl_iface.h" 33#include "pcsc_funcs.h" 34#include "common/version.h" 35#include "rsn_supp/preauth.h" 36#include "rsn_supp/pmksa_cache.h" 37#include "common/wpa_ctrl.h" 38#include "mlme.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 "ap.h" 47#include "p2p_supplicant.h" 48#include "notify.h" 49#include "bgscan.h" 50#include "bss.h" 51#include "scan.h" 52 53const char *wpa_supplicant_version = 54"wpa_supplicant v" VERSION_STR "\n" 55"Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi> and contributors"; 56 57const char *wpa_supplicant_license = 58"This program is free software. You can distribute it and/or modify it\n" 59"under the terms of the GNU General Public License version 2.\n" 60"\n" 61"Alternatively, this software may be distributed under the terms of the\n" 62"BSD license. See README and COPYING for more details.\n" 63#ifdef EAP_TLS_OPENSSL 64"\nThis product includes software developed by the OpenSSL Project\n" 65"for use in the OpenSSL Toolkit (http://www.openssl.org/)\n" 66#endif /* EAP_TLS_OPENSSL */ 67; 68 69#ifndef CONFIG_NO_STDOUT_DEBUG 70/* Long text divided into parts in order to fit in C89 strings size limits. */ 71const char *wpa_supplicant_full_license1 = 72"This program is free software; you can redistribute it and/or modify\n" 73"it under the terms of the GNU General Public License version 2 as\n" 74"published by the Free Software Foundation.\n" 75"\n" 76"This program is distributed in the hope that it will be useful,\n" 77"but WITHOUT ANY WARRANTY; without even the implied warranty of\n" 78"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" 79"GNU General Public License for more details.\n" 80"\n"; 81const char *wpa_supplicant_full_license2 = 82"You should have received a copy of the GNU General Public License\n" 83"along with this program; if not, write to the Free Software\n" 84"Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA\n" 85"\n" 86"Alternatively, this software may be distributed under the terms of the\n" 87"BSD license.\n" 88"\n" 89"Redistribution and use in source and binary forms, with or without\n" 90"modification, are permitted provided that the following conditions are\n" 91"met:\n" 92"\n"; 93const char *wpa_supplicant_full_license3 = 94"1. Redistributions of source code must retain the above copyright\n" 95" notice, this list of conditions and the following disclaimer.\n" 96"\n" 97"2. Redistributions in binary form must reproduce the above copyright\n" 98" notice, this list of conditions and the following disclaimer in the\n" 99" documentation and/or other materials provided with the distribution.\n" 100"\n"; 101const char *wpa_supplicant_full_license4 = 102"3. Neither the name(s) of the above-listed copyright holder(s) nor the\n" 103" names of its contributors may be used to endorse or promote products\n" 104" derived from this software without specific prior written permission.\n" 105"\n" 106"THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n" 107"\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n" 108"LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n" 109"A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n"; 110const char *wpa_supplicant_full_license5 = 111"OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n" 112"SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n" 113"LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n" 114"DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n" 115"THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n" 116"(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n" 117"OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n" 118"\n"; 119#endif /* CONFIG_NO_STDOUT_DEBUG */ 120 121extern int wpa_debug_level; 122extern int wpa_debug_show_keys; 123extern int wpa_debug_timestamp; 124extern struct wpa_driver_ops *wpa_drivers[]; 125 126/* Configure default/group WEP keys for static WEP */ 127int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) 128{ 129 int i, set = 0; 130 131 for (i = 0; i < NUM_WEP_KEYS; i++) { 132 if (ssid->wep_key_len[i] == 0) 133 continue; 134 135 set = 1; 136 wpa_drv_set_key(wpa_s, WPA_ALG_WEP, NULL, 137 i, i == ssid->wep_tx_keyidx, NULL, 0, 138 ssid->wep_key[i], ssid->wep_key_len[i]); 139 } 140 141 return set; 142} 143 144 145static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s, 146 struct wpa_ssid *ssid) 147{ 148 u8 key[32]; 149 size_t keylen; 150 enum wpa_alg alg; 151 u8 seq[6] = { 0 }; 152 153 /* IBSS/WPA-None uses only one key (Group) for both receiving and 154 * sending unicast and multicast packets. */ 155 156 if (ssid->mode != WPAS_MODE_IBSS) { 157 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid mode %d (not " 158 "IBSS/ad-hoc) for WPA-None", ssid->mode); 159 return -1; 160 } 161 162 if (!ssid->psk_set) { 163 wpa_msg(wpa_s, MSG_INFO, "WPA: No PSK configured for " 164 "WPA-None"); 165 return -1; 166 } 167 168 switch (wpa_s->group_cipher) { 169 case WPA_CIPHER_CCMP: 170 os_memcpy(key, ssid->psk, 16); 171 keylen = 16; 172 alg = WPA_ALG_CCMP; 173 break; 174 case WPA_CIPHER_TKIP: 175 /* WPA-None uses the same Michael MIC key for both TX and RX */ 176 os_memcpy(key, ssid->psk, 16 + 8); 177 os_memcpy(key + 16 + 8, ssid->psk + 16, 8); 178 keylen = 32; 179 alg = WPA_ALG_TKIP; 180 break; 181 default: 182 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid group cipher %d for " 183 "WPA-None", wpa_s->group_cipher); 184 return -1; 185 } 186 187 /* TODO: should actually remember the previously used seq#, both for TX 188 * and RX from each STA.. */ 189 190 return wpa_drv_set_key(wpa_s, alg, NULL, 0, 1, seq, 6, key, keylen); 191} 192 193 194static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx) 195{ 196 struct wpa_supplicant *wpa_s = eloop_ctx; 197 const u8 *bssid = wpa_s->bssid; 198 if (is_zero_ether_addr(bssid)) 199 bssid = wpa_s->pending_bssid; 200 wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.", 201 MAC2STR(bssid)); 202 wpa_blacklist_add(wpa_s, bssid); 203 wpa_sm_notify_disassoc(wpa_s->wpa); 204 wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING); 205 wpa_s->reassociate = 1; 206 207 /* 208 * If we timed out, the AP or the local radio may be busy. 209 * So, wait a second until scanning again. 210 */ 211 wpa_supplicant_req_scan(wpa_s, 1, 0); 212} 213 214 215/** 216 * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication 217 * @wpa_s: Pointer to wpa_supplicant data 218 * @sec: Number of seconds after which to time out authentication 219 * @usec: Number of microseconds after which to time out authentication 220 * 221 * This function is used to schedule a timeout for the current authentication 222 * attempt. 223 */ 224void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s, 225 int sec, int usec) 226{ 227 if (wpa_s->conf && wpa_s->conf->ap_scan == 0 && 228 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) 229 return; 230 231 wpa_dbg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec " 232 "%d usec", sec, usec); 233 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL); 234 eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL); 235} 236 237 238/** 239 * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout 240 * @wpa_s: Pointer to wpa_supplicant data 241 * 242 * This function is used to cancel authentication timeout scheduled with 243 * wpa_supplicant_req_auth_timeout() and it is called when authentication has 244 * been completed. 245 */ 246void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s) 247{ 248 wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout"); 249 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL); 250 wpa_blacklist_del(wpa_s, wpa_s->bssid); 251} 252 253 254/** 255 * wpa_supplicant_initiate_eapol - Configure EAPOL state machine 256 * @wpa_s: Pointer to wpa_supplicant data 257 * 258 * This function is used to configure EAPOL state machine based on the selected 259 * authentication mode. 260 */ 261void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s) 262{ 263#ifdef IEEE8021X_EAPOL 264 struct eapol_config eapol_conf; 265 struct wpa_ssid *ssid = wpa_s->current_ssid; 266 267#ifdef CONFIG_IBSS_RSN 268 if (ssid->mode == WPAS_MODE_IBSS && 269 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE && 270 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) { 271 /* 272 * RSN IBSS authentication is per-STA and we can disable the 273 * per-BSSID EAPOL authentication. 274 */ 275 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized); 276 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE); 277 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE); 278 return; 279 } 280#endif /* CONFIG_IBSS_RSN */ 281 282 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); 283 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE); 284 285 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || 286 wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) 287 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized); 288 else 289 eapol_sm_notify_portControl(wpa_s->eapol, Auto); 290 291 os_memset(&eapol_conf, 0, sizeof(eapol_conf)); 292 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 293 eapol_conf.accept_802_1x_keys = 1; 294 eapol_conf.required_keys = 0; 295 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) { 296 eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST; 297 } 298 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) { 299 eapol_conf.required_keys |= 300 EAPOL_REQUIRE_KEY_BROADCAST; 301 } 302 303 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED)) 304 eapol_conf.required_keys = 0; 305 } 306 if (wpa_s->conf) 307 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth; 308 eapol_conf.workaround = ssid->eap_workaround; 309 eapol_conf.eap_disabled = 310 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) && 311 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA && 312 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS; 313 eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf); 314#endif /* IEEE8021X_EAPOL */ 315} 316 317 318/** 319 * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode 320 * @wpa_s: Pointer to wpa_supplicant data 321 * @ssid: Configuration data for the network 322 * 323 * This function is used to configure WPA state machine and related parameters 324 * to a mode where WPA is not enabled. This is called as part of the 325 * authentication configuration when the selected network does not use WPA. 326 */ 327void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s, 328 struct wpa_ssid *ssid) 329{ 330 int i; 331 332 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) 333 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS; 334 else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) 335 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA; 336 else 337 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE; 338 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0); 339 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0); 340 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 341 wpa_s->pairwise_cipher = WPA_CIPHER_NONE; 342 wpa_s->group_cipher = WPA_CIPHER_NONE; 343 wpa_s->mgmt_group_cipher = 0; 344 345 for (i = 0; i < NUM_WEP_KEYS; i++) { 346 if (ssid->wep_key_len[i] > 5) { 347 wpa_s->pairwise_cipher = WPA_CIPHER_WEP104; 348 wpa_s->group_cipher = WPA_CIPHER_WEP104; 349 break; 350 } else if (ssid->wep_key_len[i] > 0) { 351 wpa_s->pairwise_cipher = WPA_CIPHER_WEP40; 352 wpa_s->group_cipher = WPA_CIPHER_WEP40; 353 break; 354 } 355 } 356 357 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0); 358 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt); 359 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE, 360 wpa_s->pairwise_cipher); 361 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher); 362#ifdef CONFIG_IEEE80211W 363 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP, 364 wpa_s->mgmt_group_cipher); 365#endif /* CONFIG_IEEE80211W */ 366 367 pmksa_cache_clear_current(wpa_s->wpa); 368} 369 370 371static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s) 372{ 373 bgscan_deinit(wpa_s); 374 scard_deinit(wpa_s->scard); 375 wpa_s->scard = NULL; 376 wpa_sm_set_scard_ctx(wpa_s->wpa, NULL); 377 eapol_sm_register_scard_ctx(wpa_s->eapol, NULL); 378 l2_packet_deinit(wpa_s->l2); 379 wpa_s->l2 = NULL; 380 if (wpa_s->l2_br) { 381 l2_packet_deinit(wpa_s->l2_br); 382 wpa_s->l2_br = NULL; 383 } 384 385 if (wpa_s->conf != NULL) { 386 struct wpa_ssid *ssid; 387 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) 388 wpas_notify_network_removed(wpa_s, ssid); 389 } 390 391 os_free(wpa_s->confname); 392 wpa_s->confname = NULL; 393 394 wpa_sm_set_eapol(wpa_s->wpa, NULL); 395 eapol_sm_deinit(wpa_s->eapol); 396 wpa_s->eapol = NULL; 397 398 rsn_preauth_deinit(wpa_s->wpa); 399 400#ifdef CONFIG_TDLS 401 wpa_tdls_deinit(wpa_s->wpa); 402#endif /* CONFIG_TDLS */ 403 404 pmksa_candidate_free(wpa_s->wpa); 405 wpa_sm_deinit(wpa_s->wpa); 406 wpa_s->wpa = NULL; 407 wpa_blacklist_clear(wpa_s); 408 409 wpa_bss_deinit(wpa_s); 410 411 wpa_supplicant_cancel_scan(wpa_s); 412 wpa_supplicant_cancel_auth_timeout(wpa_s); 413 414 ieee80211_sta_deinit(wpa_s); 415 416 wpas_wps_deinit(wpa_s); 417 418 wpabuf_free(wpa_s->pending_eapol_rx); 419 wpa_s->pending_eapol_rx = NULL; 420 421#ifdef CONFIG_IBSS_RSN 422 ibss_rsn_deinit(wpa_s->ibss_rsn); 423 wpa_s->ibss_rsn = NULL; 424#endif /* CONFIG_IBSS_RSN */ 425 426 sme_deinit(wpa_s); 427 428#ifdef CONFIG_AP 429 wpa_supplicant_ap_deinit(wpa_s); 430#endif /* CONFIG_AP */ 431 432#ifdef CONFIG_P2P 433 wpas_p2p_deinit(wpa_s); 434#endif /* CONFIG_P2P */ 435 436 os_free(wpa_s->next_scan_freqs); 437 wpa_s->next_scan_freqs = NULL; 438} 439 440 441/** 442 * wpa_clear_keys - Clear keys configured for the driver 443 * @wpa_s: Pointer to wpa_supplicant data 444 * @addr: Previously used BSSID or %NULL if not available 445 * 446 * This function clears the encryption keys that has been previously configured 447 * for the driver. 448 */ 449void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr) 450{ 451 if (wpa_s->keys_cleared) { 452 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have 453 * timing issues with keys being cleared just before new keys 454 * are set or just after association or something similar. This 455 * shows up in group key handshake failing often because of the 456 * client not receiving the first encrypted packets correctly. 457 * Skipping some of the extra key clearing steps seems to help 458 * in completing group key handshake more reliably. */ 459 wpa_dbg(wpa_s, MSG_DEBUG, "No keys have been configured - " 460 "skip key clearing"); 461 return; 462 } 463 464 /* MLME-DELETEKEYS.request */ 465 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 0, 0, NULL, 0, NULL, 0); 466 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 1, 0, NULL, 0, NULL, 0); 467 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 2, 0, NULL, 0, NULL, 0); 468 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 3, 0, NULL, 0, NULL, 0); 469#ifdef CONFIG_IEEE80211W 470 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 4, 0, NULL, 0, NULL, 0); 471 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 5, 0, NULL, 0, NULL, 0); 472#endif /* CONFIG_IEEE80211W */ 473 if (addr) { 474 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL, 475 0); 476 /* MLME-SETPROTECTION.request(None) */ 477 wpa_drv_mlme_setprotection( 478 wpa_s, addr, 479 MLME_SETPROTECTION_PROTECT_TYPE_NONE, 480 MLME_SETPROTECTION_KEY_TYPE_PAIRWISE); 481 } 482 wpa_s->keys_cleared = 1; 483} 484 485 486/** 487 * wpa_supplicant_state_txt - Get the connection state name as a text string 488 * @state: State (wpa_state; WPA_*) 489 * Returns: The state name as a printable text string 490 */ 491const char * wpa_supplicant_state_txt(enum wpa_states state) 492{ 493 switch (state) { 494 case WPA_DISCONNECTED: 495 return "DISCONNECTED"; 496 case WPA_INACTIVE: 497 return "INACTIVE"; 498 case WPA_INTERFACE_DISABLED: 499 return "INTERFACE_DISABLED"; 500 case WPA_SCANNING: 501 return "SCANNING"; 502 case WPA_AUTHENTICATING: 503 return "AUTHENTICATING"; 504 case WPA_ASSOCIATING: 505 return "ASSOCIATING"; 506 case WPA_ASSOCIATED: 507 return "ASSOCIATED"; 508 case WPA_4WAY_HANDSHAKE: 509 return "4WAY_HANDSHAKE"; 510 case WPA_GROUP_HANDSHAKE: 511 return "GROUP_HANDSHAKE"; 512 case WPA_COMPLETED: 513 return "COMPLETED"; 514 default: 515 return "UNKNOWN"; 516 } 517} 518 519 520#ifdef CONFIG_BGSCAN 521 522static void wpa_supplicant_start_bgscan(struct wpa_supplicant *wpa_s) 523{ 524 if (wpa_s->current_ssid == wpa_s->bgscan_ssid) 525 return; 526 527 bgscan_deinit(wpa_s); 528 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) { 529 if (bgscan_init(wpa_s, wpa_s->current_ssid)) { 530 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize " 531 "bgscan"); 532 /* 533 * Live without bgscan; it is only used as a roaming 534 * optimization, so the initial connection is not 535 * affected. 536 */ 537 } else 538 wpa_s->bgscan_ssid = wpa_s->current_ssid; 539 } else 540 wpa_s->bgscan_ssid = NULL; 541} 542 543 544static void wpa_supplicant_stop_bgscan(struct wpa_supplicant *wpa_s) 545{ 546 if (wpa_s->bgscan_ssid != NULL) { 547 bgscan_deinit(wpa_s); 548 wpa_s->bgscan_ssid = NULL; 549 } 550} 551 552#endif /* CONFIG_BGSCAN */ 553 554 555/** 556 * wpa_supplicant_set_state - Set current connection state 557 * @wpa_s: Pointer to wpa_supplicant data 558 * @state: The new connection state 559 * 560 * This function is called whenever the connection state changes, e.g., 561 * association is completed for WPA/WPA2 4-Way Handshake is started. 562 */ 563void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, 564 enum wpa_states state) 565{ 566 enum wpa_states old_state = wpa_s->wpa_state; 567 568 wpa_dbg(wpa_s, MSG_DEBUG, "State: %s -> %s", 569 wpa_supplicant_state_txt(wpa_s->wpa_state), 570 wpa_supplicant_state_txt(state)); 571 572 if (state != WPA_SCANNING) 573 wpa_supplicant_notify_scanning(wpa_s, 0); 574 575 if (state == WPA_COMPLETED && wpa_s->new_connection) { 576#if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG) 577 struct wpa_ssid *ssid = wpa_s->current_ssid; 578 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to " 579 MACSTR " completed %s [id=%d id_str=%s]", 580 MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ? 581 "(reauth)" : "(auth)", 582 ssid ? ssid->id : -1, 583 ssid && ssid->id_str ? ssid->id_str : ""); 584#endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */ 585 wpa_s->new_connection = 0; 586 wpa_s->reassociated_connection = 1; 587 wpa_drv_set_operstate(wpa_s, 1); 588#ifndef IEEE8021X_EAPOL 589 wpa_drv_set_supp_port(wpa_s, 1); 590#endif /* IEEE8021X_EAPOL */ 591 wpa_s->after_wps = 0; 592#ifdef CONFIG_P2P 593 wpas_p2p_completed(wpa_s); 594#endif /* CONFIG_P2P */ 595 } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING || 596 state == WPA_ASSOCIATED) { 597 wpa_s->new_connection = 1; 598 wpa_drv_set_operstate(wpa_s, 0); 599#ifndef IEEE8021X_EAPOL 600 wpa_drv_set_supp_port(wpa_s, 0); 601#endif /* IEEE8021X_EAPOL */ 602 } 603 wpa_s->wpa_state = state; 604 605#ifdef CONFIG_BGSCAN 606 if (state == WPA_COMPLETED) 607 wpa_supplicant_start_bgscan(wpa_s); 608 else 609 wpa_supplicant_stop_bgscan(wpa_s); 610#endif /* CONFIG_BGSCAN */ 611 612 if (wpa_s->wpa_state != old_state) { 613 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state); 614 615 if (wpa_s->wpa_state == WPA_COMPLETED || 616 old_state == WPA_COMPLETED) 617 wpas_notify_auth_changed(wpa_s); 618 } 619} 620 621 622void wpa_supplicant_terminate_proc(struct wpa_global *global) 623{ 624 int pending = 0; 625#ifdef CONFIG_WPS 626 struct wpa_supplicant *wpa_s = global->ifaces; 627 while (wpa_s) { 628 if (wpas_wps_terminate_pending(wpa_s) == 1) 629 pending = 1; 630 wpa_s = wpa_s->next; 631 } 632#endif /* CONFIG_WPS */ 633 if (pending) 634 return; 635 eloop_terminate(); 636} 637 638 639static void wpa_supplicant_terminate(int sig, void *signal_ctx) 640{ 641 struct wpa_global *global = signal_ctx; 642 struct wpa_supplicant *wpa_s; 643 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { 644 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d " 645 "received", sig); 646 } 647 wpa_supplicant_terminate_proc(global); 648} 649 650 651void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s) 652{ 653 enum wpa_states old_state = wpa_s->wpa_state; 654 655 wpa_s->pairwise_cipher = 0; 656 wpa_s->group_cipher = 0; 657 wpa_s->mgmt_group_cipher = 0; 658 wpa_s->key_mgmt = 0; 659 if (wpa_s->wpa_state != WPA_INTERFACE_DISABLED) 660 wpa_s->wpa_state = WPA_DISCONNECTED; 661 662 if (wpa_s->wpa_state != old_state) 663 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state); 664} 665 666 667/** 668 * wpa_supplicant_reload_configuration - Reload configuration data 669 * @wpa_s: Pointer to wpa_supplicant data 670 * Returns: 0 on success or -1 if configuration parsing failed 671 * 672 * This function can be used to request that the configuration data is reloaded 673 * (e.g., after configuration file change). This function is reloading 674 * configuration only for one interface, so this may need to be called multiple 675 * times if %wpa_supplicant is controlling multiple interfaces and all 676 * interfaces need reconfiguration. 677 */ 678int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s) 679{ 680 struct wpa_config *conf; 681 struct wpa_ssid *old_ssid; 682 int reconf_ctrl; 683 int old_ap_scan; 684 685 if (wpa_s->confname == NULL) 686 return -1; 687 conf = wpa_config_read(wpa_s->confname); 688 if (conf == NULL) { 689 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration " 690 "file '%s' - exiting", wpa_s->confname); 691 return -1; 692 } 693 conf->changed_parameters = (unsigned int) -1; 694 695 reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface 696 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface && 697 os_strcmp(conf->ctrl_interface, 698 wpa_s->conf->ctrl_interface) != 0); 699 700 if (reconf_ctrl && wpa_s->ctrl_iface) { 701 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface); 702 wpa_s->ctrl_iface = NULL; 703 } 704 705 eapol_sm_invalidate_cached_session(wpa_s->eapol); 706 old_ssid = wpa_s->current_ssid; 707 wpa_s->current_ssid = NULL; 708 if (old_ssid != wpa_s->current_ssid) 709 wpas_notify_network_changed(wpa_s); 710 711 /* 712 * TODO: should notify EAPOL SM about changes in opensc_engine_path, 713 * pkcs11_engine_path, pkcs11_module_path. 714 */ 715 if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) { 716 /* 717 * Clear forced success to clear EAP state for next 718 * authentication. 719 */ 720 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE); 721 } 722 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); 723 wpa_sm_set_config(wpa_s->wpa, NULL); 724 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth); 725 rsn_preauth_deinit(wpa_s->wpa); 726 727 old_ap_scan = wpa_s->conf->ap_scan; 728 wpa_config_free(wpa_s->conf); 729 wpa_s->conf = conf; 730 if (old_ap_scan != wpa_s->conf->ap_scan) 731 wpas_notify_ap_scan_changed(wpa_s); 732 733 if (reconf_ctrl) 734 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s); 735 736 wpa_supplicant_update_config(wpa_s); 737 738 wpa_supplicant_clear_status(wpa_s); 739 if (wpa_supplicant_enabled_networks(wpa_s->conf)) { 740 wpa_s->reassociate = 1; 741 wpa_supplicant_req_scan(wpa_s, 0, 0); 742 } 743 wpa_dbg(wpa_s, MSG_DEBUG, "Reconfiguration completed"); 744 return 0; 745} 746 747 748static void wpa_supplicant_reconfig(int sig, void *signal_ctx) 749{ 750 struct wpa_global *global = signal_ctx; 751 struct wpa_supplicant *wpa_s; 752 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { 753 wpa_dbg(wpa_s, MSG_DEBUG, "Signal %d received - reconfiguring", 754 sig); 755 if (wpa_supplicant_reload_configuration(wpa_s) < 0) { 756 wpa_supplicant_terminate_proc(global); 757 } 758 } 759} 760 761 762enum wpa_cipher cipher_suite2driver(int cipher) 763{ 764 switch (cipher) { 765 case WPA_CIPHER_NONE: 766 return CIPHER_NONE; 767 case WPA_CIPHER_WEP40: 768 return CIPHER_WEP40; 769 case WPA_CIPHER_WEP104: 770 return CIPHER_WEP104; 771 case WPA_CIPHER_CCMP: 772 return CIPHER_CCMP; 773 case WPA_CIPHER_TKIP: 774 default: 775 return CIPHER_TKIP; 776 } 777} 778 779 780enum wpa_key_mgmt key_mgmt2driver(int key_mgmt) 781{ 782 switch (key_mgmt) { 783 case WPA_KEY_MGMT_NONE: 784 return KEY_MGMT_NONE; 785 case WPA_KEY_MGMT_IEEE8021X_NO_WPA: 786 return KEY_MGMT_802_1X_NO_WPA; 787 case WPA_KEY_MGMT_IEEE8021X: 788 return KEY_MGMT_802_1X; 789 case WPA_KEY_MGMT_WPA_NONE: 790 return KEY_MGMT_WPA_NONE; 791 case WPA_KEY_MGMT_FT_IEEE8021X: 792 return KEY_MGMT_FT_802_1X; 793 case WPA_KEY_MGMT_FT_PSK: 794 return KEY_MGMT_FT_PSK; 795 case WPA_KEY_MGMT_IEEE8021X_SHA256: 796 return KEY_MGMT_802_1X_SHA256; 797 case WPA_KEY_MGMT_PSK_SHA256: 798 return KEY_MGMT_PSK_SHA256; 799 case WPA_KEY_MGMT_WPS: 800 return KEY_MGMT_WPS; 801 case WPA_KEY_MGMT_PSK: 802 default: 803 return KEY_MGMT_PSK; 804 } 805} 806 807 808static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s, 809 struct wpa_ssid *ssid, 810 struct wpa_ie_data *ie) 811{ 812 int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie); 813 if (ret) { 814 if (ret == -2) { 815 wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE " 816 "from association info"); 817 } 818 return -1; 819 } 820 821 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set " 822 "cipher suites"); 823 if (!(ie->group_cipher & ssid->group_cipher)) { 824 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group " 825 "cipher 0x%x (mask 0x%x) - reject", 826 ie->group_cipher, ssid->group_cipher); 827 return -1; 828 } 829 if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) { 830 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise " 831 "cipher 0x%x (mask 0x%x) - reject", 832 ie->pairwise_cipher, ssid->pairwise_cipher); 833 return -1; 834 } 835 if (!(ie->key_mgmt & ssid->key_mgmt)) { 836 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key " 837 "management 0x%x (mask 0x%x) - reject", 838 ie->key_mgmt, ssid->key_mgmt); 839 return -1; 840 } 841 842#ifdef CONFIG_IEEE80211W 843 if (!(ie->capabilities & WPA_CAPABILITY_MFPC) && 844 ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) { 845 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP " 846 "that does not support management frame protection - " 847 "reject"); 848 return -1; 849 } 850#endif /* CONFIG_IEEE80211W */ 851 852 return 0; 853} 854 855 856/** 857 * wpa_supplicant_set_suites - Set authentication and encryption parameters 858 * @wpa_s: Pointer to wpa_supplicant data 859 * @bss: Scan results for the selected BSS, or %NULL if not available 860 * @ssid: Configuration data for the selected network 861 * @wpa_ie: Buffer for the WPA/RSN IE 862 * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the 863 * used buffer length in case the functions returns success. 864 * Returns: 0 on success or -1 on failure 865 * 866 * This function is used to configure authentication and encryption parameters 867 * based on the network configuration and scan result for the selected BSS (if 868 * available). 869 */ 870int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s, 871 struct wpa_bss *bss, struct wpa_ssid *ssid, 872 u8 *wpa_ie, size_t *wpa_ie_len) 873{ 874 struct wpa_ie_data ie; 875 int sel, proto; 876 const u8 *bss_wpa, *bss_rsn; 877 878 if (bss) { 879 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE); 880 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 881 } else 882 bss_wpa = bss_rsn = NULL; 883 884 if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) && 885 wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 && 886 (ie.group_cipher & ssid->group_cipher) && 887 (ie.pairwise_cipher & ssid->pairwise_cipher) && 888 (ie.key_mgmt & ssid->key_mgmt)) { 889 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0"); 890 proto = WPA_PROTO_RSN; 891 } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) && 892 wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 && 893 (ie.group_cipher & ssid->group_cipher) && 894 (ie.pairwise_cipher & ssid->pairwise_cipher) && 895 (ie.key_mgmt & ssid->key_mgmt)) { 896 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0"); 897 proto = WPA_PROTO_WPA; 898 } else if (bss) { 899 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN"); 900 return -1; 901 } else { 902 if (ssid->proto & WPA_PROTO_RSN) 903 proto = WPA_PROTO_RSN; 904 else 905 proto = WPA_PROTO_WPA; 906 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) { 907 os_memset(&ie, 0, sizeof(ie)); 908 ie.group_cipher = ssid->group_cipher; 909 ie.pairwise_cipher = ssid->pairwise_cipher; 910 ie.key_mgmt = ssid->key_mgmt; 911#ifdef CONFIG_IEEE80211W 912 ie.mgmt_group_cipher = 913 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ? 914 WPA_CIPHER_AES_128_CMAC : 0; 915#endif /* CONFIG_IEEE80211W */ 916 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Set cipher suites " 917 "based on configuration"); 918 } else 919 proto = ie.proto; 920 } 921 922 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected cipher suites: group %d " 923 "pairwise %d key_mgmt %d proto %d", 924 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto); 925#ifdef CONFIG_IEEE80211W 926 if (ssid->ieee80211w) { 927 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected mgmt group cipher %d", 928 ie.mgmt_group_cipher); 929 } 930#endif /* CONFIG_IEEE80211W */ 931 932 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto); 933 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 934 !!(ssid->proto & WPA_PROTO_RSN)); 935 936 if (bss || !wpa_s->ap_ies_from_associnfo) { 937 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa, 938 bss_wpa ? 2 + bss_wpa[1] : 0) || 939 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn, 940 bss_rsn ? 2 + bss_rsn[1] : 0)) 941 return -1; 942 } 943 944 sel = ie.group_cipher & ssid->group_cipher; 945 if (sel & WPA_CIPHER_CCMP) { 946 wpa_s->group_cipher = WPA_CIPHER_CCMP; 947 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP"); 948 } else if (sel & WPA_CIPHER_TKIP) { 949 wpa_s->group_cipher = WPA_CIPHER_TKIP; 950 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP"); 951 } else if (sel & WPA_CIPHER_WEP104) { 952 wpa_s->group_cipher = WPA_CIPHER_WEP104; 953 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104"); 954 } else if (sel & WPA_CIPHER_WEP40) { 955 wpa_s->group_cipher = WPA_CIPHER_WEP40; 956 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40"); 957 } else { 958 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select group " 959 "cipher"); 960 return -1; 961 } 962 963 sel = ie.pairwise_cipher & ssid->pairwise_cipher; 964 if (sel & WPA_CIPHER_CCMP) { 965 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP; 966 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP"); 967 } else if (sel & WPA_CIPHER_TKIP) { 968 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP; 969 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP"); 970 } else if (sel & WPA_CIPHER_NONE) { 971 wpa_s->pairwise_cipher = WPA_CIPHER_NONE; 972 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE"); 973 } else { 974 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select pairwise " 975 "cipher"); 976 return -1; 977 } 978 979 sel = ie.key_mgmt & ssid->key_mgmt; 980 if (0) { 981#ifdef CONFIG_IEEE80211R 982 } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) { 983 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X; 984 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X"); 985 } else if (sel & WPA_KEY_MGMT_FT_PSK) { 986 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK; 987 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK"); 988#endif /* CONFIG_IEEE80211R */ 989#ifdef CONFIG_IEEE80211W 990 } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) { 991 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256; 992 wpa_dbg(wpa_s, MSG_DEBUG, 993 "WPA: using KEY_MGMT 802.1X with SHA256"); 994 } else if (sel & WPA_KEY_MGMT_PSK_SHA256) { 995 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256; 996 wpa_dbg(wpa_s, MSG_DEBUG, 997 "WPA: using KEY_MGMT PSK with SHA256"); 998#endif /* CONFIG_IEEE80211W */ 999 } else if (sel & WPA_KEY_MGMT_IEEE8021X) { 1000 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X; 1001 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X"); 1002 } else if (sel & WPA_KEY_MGMT_PSK) { 1003 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK; 1004 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK"); 1005 } else if (sel & WPA_KEY_MGMT_WPA_NONE) { 1006 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE; 1007 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE"); 1008 } else { 1009 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select " 1010 "authenticated key management type"); 1011 return -1; 1012 } 1013 1014 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt); 1015 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE, 1016 wpa_s->pairwise_cipher); 1017 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher); 1018 1019#ifdef CONFIG_IEEE80211W 1020 sel = ie.mgmt_group_cipher; 1021 if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION || 1022 !(ie.capabilities & WPA_CAPABILITY_MFPC)) 1023 sel = 0; 1024 if (sel & WPA_CIPHER_AES_128_CMAC) { 1025 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC; 1026 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher " 1027 "AES-128-CMAC"); 1028 } else { 1029 wpa_s->mgmt_group_cipher = 0; 1030 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher"); 1031 } 1032 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP, 1033 wpa_s->mgmt_group_cipher); 1034 wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w); 1035#endif /* CONFIG_IEEE80211W */ 1036 1037 if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) { 1038 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to generate WPA IE"); 1039 return -1; 1040 } 1041 1042 if (ssid->key_mgmt & 1043 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256)) 1044 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN); 1045 else 1046 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa); 1047 1048 return 0; 1049} 1050 1051 1052/** 1053 * wpa_supplicant_associate - Request association 1054 * @wpa_s: Pointer to wpa_supplicant data 1055 * @bss: Scan results for the selected BSS, or %NULL if not available 1056 * @ssid: Configuration data for the selected network 1057 * 1058 * This function is used to request %wpa_supplicant to associate with a BSS. 1059 */ 1060void wpa_supplicant_associate(struct wpa_supplicant *wpa_s, 1061 struct wpa_bss *bss, struct wpa_ssid *ssid) 1062{ 1063 u8 wpa_ie[200]; 1064 size_t wpa_ie_len; 1065 int use_crypt, ret, i, bssid_changed; 1066 int algs = WPA_AUTH_ALG_OPEN; 1067 enum wpa_cipher cipher_pairwise, cipher_group; 1068 struct wpa_driver_associate_params params; 1069 int wep_keys_set = 0; 1070 struct wpa_driver_capa capa; 1071 int assoc_failed = 0; 1072 struct wpa_ssid *old_ssid; 1073 1074#ifdef CONFIG_IBSS_RSN 1075 ibss_rsn_deinit(wpa_s->ibss_rsn); 1076 wpa_s->ibss_rsn = NULL; 1077#endif /* CONFIG_IBSS_RSN */ 1078 1079 if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO || 1080 ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) { 1081#ifdef CONFIG_AP 1082 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) { 1083 wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP " 1084 "mode"); 1085 return; 1086 } 1087 wpa_supplicant_create_ap(wpa_s, ssid); 1088 wpa_s->current_bss = bss; 1089#else /* CONFIG_AP */ 1090 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in " 1091 "the build"); 1092#endif /* CONFIG_AP */ 1093 return; 1094 } 1095 1096#ifdef CONFIG_TDLS 1097 if (bss) 1098 wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1), 1099 bss->ie_len); 1100#endif /* CONFIG_TDLS */ 1101 1102 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) && 1103 ssid->mode == IEEE80211_MODE_INFRA) { 1104 sme_authenticate(wpa_s, bss, ssid); 1105 return; 1106 } 1107 1108 os_memset(¶ms, 0, sizeof(params)); 1109 wpa_s->reassociate = 0; 1110 if (bss) { 1111#ifdef CONFIG_IEEE80211R 1112 const u8 *ie, *md = NULL; 1113#endif /* CONFIG_IEEE80211R */ 1114 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR 1115 " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid), 1116 wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq); 1117 bssid_changed = !is_zero_ether_addr(wpa_s->bssid); 1118 os_memset(wpa_s->bssid, 0, ETH_ALEN); 1119 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN); 1120 if (bssid_changed) 1121 wpas_notify_bssid_changed(wpa_s); 1122#ifdef CONFIG_IEEE80211R 1123 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN); 1124 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN) 1125 md = ie + 2; 1126 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0); 1127 if (md) { 1128 /* Prepare for the next transition */ 1129 wpa_ft_prepare_auth_request(wpa_s->wpa, ie); 1130 } 1131#endif /* CONFIG_IEEE80211R */ 1132#ifdef CONFIG_WPS 1133 } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) && 1134 wpa_s->conf->ap_scan == 2 && 1135 (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) { 1136 /* Use ap_scan==1 style network selection to find the network 1137 */ 1138 wpa_s->scan_req = 2; 1139 wpa_s->reassociate = 1; 1140 wpa_supplicant_req_scan(wpa_s, 0, 0); 1141 return; 1142#endif /* CONFIG_WPS */ 1143 } else { 1144 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'", 1145 wpa_ssid_txt(ssid->ssid, ssid->ssid_len)); 1146 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 1147 } 1148 wpa_supplicant_cancel_scan(wpa_s); 1149 1150 /* Starting new association, so clear the possibly used WPA IE from the 1151 * previous association. */ 1152 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0); 1153 1154#ifdef IEEE8021X_EAPOL 1155 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 1156 if (ssid->leap) { 1157 if (ssid->non_leap == 0) 1158 algs = WPA_AUTH_ALG_LEAP; 1159 else 1160 algs |= WPA_AUTH_ALG_LEAP; 1161 } 1162 } 1163#endif /* IEEE8021X_EAPOL */ 1164 wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs); 1165 if (ssid->auth_alg) { 1166 algs = ssid->auth_alg; 1167 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: " 1168 "0x%x", algs); 1169 } 1170 1171 if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) || 1172 wpa_bss_get_ie(bss, WLAN_EID_RSN)) && 1173 (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK | 1174 WPA_KEY_MGMT_FT_IEEE8021X | 1175 WPA_KEY_MGMT_FT_PSK | 1176 WPA_KEY_MGMT_IEEE8021X_SHA256 | 1177 WPA_KEY_MGMT_PSK_SHA256))) { 1178 int try_opportunistic; 1179 try_opportunistic = ssid->proactive_key_caching && 1180 (ssid->proto & WPA_PROTO_RSN); 1181 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, 1182 wpa_s->current_ssid, 1183 try_opportunistic) == 0) 1184 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1); 1185 wpa_ie_len = sizeof(wpa_ie); 1186 if (wpa_supplicant_set_suites(wpa_s, bss, ssid, 1187 wpa_ie, &wpa_ie_len)) { 1188 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA " 1189 "key management and encryption suites"); 1190 return; 1191 } 1192 } else if (ssid->key_mgmt & 1193 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X | 1194 WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK | 1195 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 | 1196 WPA_KEY_MGMT_IEEE8021X_SHA256)) { 1197 wpa_ie_len = sizeof(wpa_ie); 1198 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid, 1199 wpa_ie, &wpa_ie_len)) { 1200 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA " 1201 "key management and encryption suites (no " 1202 "scan results)"); 1203 return; 1204 } 1205#ifdef CONFIG_WPS 1206 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) { 1207 struct wpabuf *wps_ie; 1208 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid)); 1209 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) { 1210 wpa_ie_len = wpabuf_len(wps_ie); 1211 os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len); 1212 } else 1213 wpa_ie_len = 0; 1214 wpabuf_free(wps_ie); 1215 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 1216 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY)) 1217 params.wps = WPS_MODE_PRIVACY; 1218 else 1219 params.wps = WPS_MODE_OPEN; 1220#endif /* CONFIG_WPS */ 1221 } else { 1222 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid); 1223 wpa_ie_len = 0; 1224 } 1225 1226#ifdef CONFIG_P2P 1227 if (wpa_s->global->p2p) { 1228 u8 *pos; 1229 size_t len; 1230 int res; 1231 int p2p_group; 1232 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE; 1233 pos = wpa_ie + wpa_ie_len; 1234 len = sizeof(wpa_ie) - wpa_ie_len; 1235 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group); 1236 if (res >= 0) 1237 wpa_ie_len += res; 1238 } 1239 1240 wpa_s->cross_connect_disallowed = 0; 1241 if (bss) { 1242 struct wpabuf *p2p; 1243 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE); 1244 if (p2p) { 1245 wpa_s->cross_connect_disallowed = 1246 p2p_get_cross_connect_disallowed(p2p); 1247 wpabuf_free(p2p); 1248 wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross " 1249 "connection", 1250 wpa_s->cross_connect_disallowed ? 1251 "disallows" : "allows"); 1252 } 1253 } 1254#endif /* CONFIG_P2P */ 1255 1256 wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL); 1257 use_crypt = 1; 1258 cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher); 1259 cipher_group = cipher_suite2driver(wpa_s->group_cipher); 1260 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE || 1261 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 1262 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) 1263 use_crypt = 0; 1264 if (wpa_set_wep_keys(wpa_s, ssid)) { 1265 use_crypt = 1; 1266 wep_keys_set = 1; 1267 } 1268 } 1269 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) 1270 use_crypt = 0; 1271 1272#ifdef IEEE8021X_EAPOL 1273 if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 1274 if ((ssid->eapol_flags & 1275 (EAPOL_FLAG_REQUIRE_KEY_UNICAST | 1276 EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 && 1277 !wep_keys_set) { 1278 use_crypt = 0; 1279 } else { 1280 /* Assume that dynamic WEP-104 keys will be used and 1281 * set cipher suites in order for drivers to expect 1282 * encryption. */ 1283 cipher_pairwise = cipher_group = CIPHER_WEP104; 1284 } 1285 } 1286#endif /* IEEE8021X_EAPOL */ 1287 1288 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { 1289 /* Set the key before (and later after) association */ 1290 wpa_supplicant_set_wpa_none_key(wpa_s, ssid); 1291 } 1292 1293 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING); 1294 if (bss) { 1295 params.bssid = bss->bssid; 1296 params.ssid = bss->ssid; 1297 params.ssid_len = bss->ssid_len; 1298 params.freq = bss->freq; 1299 } else { 1300 params.ssid = ssid->ssid; 1301 params.ssid_len = ssid->ssid_len; 1302 } 1303 if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 && 1304 params.freq == 0) 1305 params.freq = ssid->frequency; /* Initial channel for IBSS */ 1306 params.wpa_ie = wpa_ie; 1307 params.wpa_ie_len = wpa_ie_len; 1308 params.pairwise_suite = cipher_pairwise; 1309 params.group_suite = cipher_group; 1310 params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt); 1311 params.auth_alg = algs; 1312 params.mode = ssid->mode; 1313 for (i = 0; i < NUM_WEP_KEYS; i++) { 1314 if (ssid->wep_key_len[i]) 1315 params.wep_key[i] = ssid->wep_key[i]; 1316 params.wep_key_len[i] = ssid->wep_key_len[i]; 1317 } 1318 params.wep_tx_keyidx = ssid->wep_tx_keyidx; 1319 1320 if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) && 1321 (params.key_mgmt_suite == KEY_MGMT_PSK || 1322 params.key_mgmt_suite == KEY_MGMT_FT_PSK)) { 1323 params.passphrase = ssid->passphrase; 1324 if (ssid->psk_set) 1325 params.psk = ssid->psk; 1326 } 1327 1328 params.drop_unencrypted = use_crypt; 1329 1330#ifdef CONFIG_IEEE80211W 1331 params.mgmt_frame_protection = ssid->ieee80211w; 1332 if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) { 1333 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN); 1334 struct wpa_ie_data ie; 1335 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 && 1336 ie.capabilities & 1337 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) { 1338 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports " 1339 "MFP: require MFP"); 1340 params.mgmt_frame_protection = 1341 MGMT_FRAME_PROTECTION_REQUIRED; 1342 } 1343 } 1344#endif /* CONFIG_IEEE80211W */ 1345 1346#ifdef CONFIG_P2P 1347 if (wpa_s->global->p2p && 1348 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE)) 1349 params.p2p = 1; 1350#endif /* CONFIG_P2P */ 1351 1352 if (wpa_s->parent->set_sta_uapsd) 1353 params.uapsd = wpa_s->parent->sta_uapsd; 1354 else 1355 params.uapsd = -1; 1356 1357 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) 1358 ret = ieee80211_sta_associate(wpa_s, ¶ms); 1359 else 1360 ret = wpa_drv_associate(wpa_s, ¶ms); 1361 if (ret < 0) { 1362 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver " 1363 "failed"); 1364 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) { 1365 /* 1366 * The driver is known to mean what is saying, so we 1367 * can stop right here; the association will not 1368 * succeed. 1369 */ 1370 wpas_connection_failed(wpa_s, wpa_s->pending_bssid); 1371 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN); 1372 return; 1373 } 1374 /* try to continue anyway; new association will be tried again 1375 * after timeout */ 1376 assoc_failed = 1; 1377 } 1378 1379 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) { 1380 /* Set the key after the association just in case association 1381 * cleared the previously configured key. */ 1382 wpa_supplicant_set_wpa_none_key(wpa_s, ssid); 1383 /* No need to timeout authentication since there is no key 1384 * management. */ 1385 wpa_supplicant_cancel_auth_timeout(wpa_s); 1386 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED); 1387#ifdef CONFIG_IBSS_RSN 1388 } else if (ssid->mode == WPAS_MODE_IBSS && 1389 wpa_s->key_mgmt != WPA_KEY_MGMT_NONE && 1390 wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) { 1391 /* 1392 * RSN IBSS authentication is per-STA and we can disable the 1393 * per-BSSID authentication. 1394 */ 1395 wpa_supplicant_cancel_auth_timeout(wpa_s); 1396#endif /* CONFIG_IBSS_RSN */ 1397 } else { 1398 /* Timeout for IEEE 802.11 authentication and association */ 1399 int timeout = 60; 1400 1401 if (assoc_failed) { 1402 /* give IBSS a bit more time */ 1403 timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5; 1404 } else if (wpa_s->conf->ap_scan == 1) { 1405 /* give IBSS a bit more time */ 1406 timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10; 1407 } 1408 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0); 1409 } 1410 1411 if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 && 1412 capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) { 1413 /* Set static WEP keys again */ 1414 wpa_set_wep_keys(wpa_s, ssid); 1415 } 1416 1417 if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) { 1418 /* 1419 * Do not allow EAP session resumption between different 1420 * network configurations. 1421 */ 1422 eapol_sm_invalidate_cached_session(wpa_s->eapol); 1423 } 1424 old_ssid = wpa_s->current_ssid; 1425 wpa_s->current_ssid = ssid; 1426 wpa_s->current_bss = bss; 1427 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid); 1428 wpa_supplicant_initiate_eapol(wpa_s); 1429 if (old_ssid != wpa_s->current_ssid) 1430 wpas_notify_network_changed(wpa_s); 1431} 1432 1433 1434static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s, 1435 const u8 *addr) 1436{ 1437 struct wpa_ssid *old_ssid; 1438 1439 wpa_clear_keys(wpa_s, addr); 1440 wpa_supplicant_mark_disassoc(wpa_s); 1441 old_ssid = wpa_s->current_ssid; 1442 wpa_s->current_ssid = NULL; 1443 wpa_s->current_bss = NULL; 1444 wpa_sm_set_config(wpa_s->wpa, NULL); 1445 eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); 1446 if (old_ssid != wpa_s->current_ssid) 1447 wpas_notify_network_changed(wpa_s); 1448 eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL); 1449} 1450 1451 1452/** 1453 * wpa_supplicant_disassociate - Disassociate the current connection 1454 * @wpa_s: Pointer to wpa_supplicant data 1455 * @reason_code: IEEE 802.11 reason code for the disassociate frame 1456 * 1457 * This function is used to request %wpa_supplicant to disassociate with the 1458 * current AP. 1459 */ 1460void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s, 1461 int reason_code) 1462{ 1463 u8 *addr = NULL; 1464 1465 if (!is_zero_ether_addr(wpa_s->bssid)) { 1466 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) 1467 ieee80211_sta_disassociate(wpa_s, reason_code); 1468 else 1469 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code); 1470 addr = wpa_s->bssid; 1471 } 1472 1473 wpa_supplicant_clear_connection(wpa_s, addr); 1474} 1475 1476 1477/** 1478 * wpa_supplicant_deauthenticate - Deauthenticate the current connection 1479 * @wpa_s: Pointer to wpa_supplicant data 1480 * @reason_code: IEEE 802.11 reason code for the deauthenticate frame 1481 * 1482 * This function is used to request %wpa_supplicant to deauthenticate from the 1483 * current AP. 1484 */ 1485void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s, 1486 int reason_code) 1487{ 1488 u8 *addr = NULL; 1489 1490 if (!is_zero_ether_addr(wpa_s->bssid)) { 1491 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) 1492 ieee80211_sta_deauthenticate(wpa_s, reason_code); 1493 else 1494 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid, 1495 reason_code); 1496 addr = wpa_s->bssid; 1497 } 1498 1499 wpa_supplicant_clear_connection(wpa_s, addr); 1500} 1501 1502 1503/** 1504 * wpa_supplicant_enable_network - Mark a configured network as enabled 1505 * @wpa_s: wpa_supplicant structure for a network interface 1506 * @ssid: wpa_ssid structure for a configured network or %NULL 1507 * 1508 * Enables the specified network or all networks if no network specified. 1509 */ 1510void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s, 1511 struct wpa_ssid *ssid) 1512{ 1513 struct wpa_ssid *other_ssid; 1514 int was_disabled; 1515 1516 if (ssid == NULL) { 1517 for (other_ssid = wpa_s->conf->ssid; other_ssid; 1518 other_ssid = other_ssid->next) { 1519 if (other_ssid->disabled == 2) 1520 continue; /* do not change persistent P2P group 1521 * data */ 1522 if (other_ssid == wpa_s->current_ssid && 1523 other_ssid->disabled) 1524 wpa_s->reassociate = 1; 1525 1526 was_disabled = other_ssid->disabled; 1527 1528 other_ssid->disabled = 0; 1529 1530 if (was_disabled != other_ssid->disabled) 1531 wpas_notify_network_enabled_changed( 1532 wpa_s, other_ssid); 1533 } 1534 if (wpa_s->reassociate) 1535 wpa_supplicant_req_scan(wpa_s, 0, 0); 1536 } else if (ssid->disabled && ssid->disabled != 2) { 1537 if (wpa_s->current_ssid == NULL) { 1538 /* 1539 * Try to reassociate since there is no current 1540 * configuration and a new network was made available. 1541 */ 1542 wpa_s->reassociate = 1; 1543 wpa_supplicant_req_scan(wpa_s, 0, 0); 1544 } 1545 1546 was_disabled = ssid->disabled; 1547 1548 ssid->disabled = 0; 1549 1550 if (was_disabled != ssid->disabled) 1551 wpas_notify_network_enabled_changed(wpa_s, ssid); 1552 } 1553} 1554 1555 1556/** 1557 * wpa_supplicant_disable_network - Mark a configured network as disabled 1558 * @wpa_s: wpa_supplicant structure for a network interface 1559 * @ssid: wpa_ssid structure for a configured network or %NULL 1560 * 1561 * Disables the specified network or all networks if no network specified. 1562 */ 1563void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s, 1564 struct wpa_ssid *ssid) 1565{ 1566 struct wpa_ssid *other_ssid; 1567 int was_disabled; 1568 1569 if (ssid == NULL) { 1570 for (other_ssid = wpa_s->conf->ssid; other_ssid; 1571 other_ssid = other_ssid->next) { 1572 was_disabled = other_ssid->disabled; 1573 if (was_disabled == 2) 1574 continue; /* do not change persistent P2P group 1575 * data */ 1576 1577 other_ssid->disabled = 1; 1578 1579 if (was_disabled != other_ssid->disabled) 1580 wpas_notify_network_enabled_changed( 1581 wpa_s, other_ssid); 1582 } 1583 if (wpa_s->current_ssid) 1584 wpa_supplicant_disassociate( 1585 wpa_s, WLAN_REASON_DEAUTH_LEAVING); 1586 } else if (ssid->disabled != 2) { 1587 if (ssid == wpa_s->current_ssid) 1588 wpa_supplicant_disassociate( 1589 wpa_s, WLAN_REASON_DEAUTH_LEAVING); 1590 1591 was_disabled = ssid->disabled; 1592 1593 ssid->disabled = 1; 1594 1595 if (was_disabled != ssid->disabled) 1596 wpas_notify_network_enabled_changed(wpa_s, ssid); 1597 } 1598} 1599 1600 1601/** 1602 * wpa_supplicant_select_network - Attempt association with a network 1603 * @wpa_s: wpa_supplicant structure for a network interface 1604 * @ssid: wpa_ssid structure for a configured network or %NULL for any network 1605 */ 1606void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s, 1607 struct wpa_ssid *ssid) 1608{ 1609 1610 struct wpa_ssid *other_ssid; 1611 1612 if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid) 1613 wpa_supplicant_disassociate( 1614 wpa_s, WLAN_REASON_DEAUTH_LEAVING); 1615 1616 /* 1617 * Mark all other networks disabled or mark all networks enabled if no 1618 * network specified. 1619 */ 1620 for (other_ssid = wpa_s->conf->ssid; other_ssid; 1621 other_ssid = other_ssid->next) { 1622 int was_disabled = other_ssid->disabled; 1623 if (was_disabled == 2) 1624 continue; /* do not change persistent P2P group data */ 1625 1626 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0; 1627 1628 if (was_disabled != other_ssid->disabled) 1629 wpas_notify_network_enabled_changed(wpa_s, other_ssid); 1630 } 1631 wpa_s->connect_without_scan = NULL; 1632 wpa_s->disconnected = 0; 1633 wpa_s->reassociate = 1; 1634 wpa_supplicant_req_scan(wpa_s, 0, 0); 1635 1636 if (ssid) 1637 wpas_notify_network_selected(wpa_s, ssid); 1638} 1639 1640 1641/** 1642 * wpa_supplicant_set_ap_scan - Set AP scan mode for interface 1643 * @wpa_s: wpa_supplicant structure for a network interface 1644 * @ap_scan: AP scan mode 1645 * Returns: 0 if succeed or -1 if ap_scan has an invalid value 1646 * 1647 */ 1648int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan) 1649{ 1650 1651 int old_ap_scan; 1652 1653 if (ap_scan < 0 || ap_scan > 2) 1654 return -1; 1655 1656#ifdef ANDROID 1657 if ((ap_scan == 2) && ((wpa_s->wpa_state >= WPA_ASSOCIATING) && 1658 (wpa_s->wpa_state < WPA_COMPLETED))) { 1659 wpa_printf(MSG_ERROR, "ap_scan = %d (%d)",wpa_s->conf->ap_scan, 1660 ap_scan); 1661 return 0; 1662 } 1663#endif 1664 1665 old_ap_scan = wpa_s->conf->ap_scan; 1666 wpa_s->conf->ap_scan = ap_scan; 1667 1668 if (old_ap_scan != wpa_s->conf->ap_scan) 1669 wpas_notify_ap_scan_changed(wpa_s); 1670 1671 return 0; 1672} 1673 1674 1675/** 1676 * wpa_supplicant_set_bss_expiration_age - Set BSS entry expiration age 1677 * @wpa_s: wpa_supplicant structure for a network interface 1678 * @expire_age: Expiration age in seconds 1679 * Returns: 0 if succeed or -1 if expire_age has an invalid value 1680 * 1681 */ 1682int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s, 1683 unsigned int bss_expire_age) 1684{ 1685 if (bss_expire_age < 10) { 1686 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration age %u", 1687 bss_expire_age); 1688 return -1; 1689 } 1690 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration age: %d sec", 1691 bss_expire_age); 1692 wpa_s->conf->bss_expiration_age = bss_expire_age; 1693 1694 return 0; 1695} 1696 1697 1698/** 1699 * wpa_supplicant_set_bss_expiration_count - Set BSS entry expiration scan count 1700 * @wpa_s: wpa_supplicant structure for a network interface 1701 * @expire_count: number of scans after which an unseen BSS is reclaimed 1702 * Returns: 0 if succeed or -1 if expire_count has an invalid value 1703 * 1704 */ 1705int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s, 1706 unsigned int bss_expire_count) 1707{ 1708 if (bss_expire_count < 1) { 1709 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration count %u", 1710 bss_expire_count); 1711 return -1; 1712 } 1713 wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration scan count: %u", 1714 bss_expire_count); 1715 wpa_s->conf->bss_expiration_scan_count = bss_expire_count; 1716 1717 return 0; 1718} 1719 1720 1721/** 1722 * wpa_supplicant_set_debug_params - Set global debug params 1723 * @global: wpa_global structure 1724 * @debug_level: debug level 1725 * @debug_timestamp: determines if show timestamp in debug data 1726 * @debug_show_keys: determines if show keys in debug data 1727 * Returns: 0 if succeed or -1 if debug_level has wrong value 1728 */ 1729int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level, 1730 int debug_timestamp, int debug_show_keys) 1731{ 1732 1733 int old_level, old_timestamp, old_show_keys; 1734 1735 /* check for allowed debuglevels */ 1736 if (debug_level != MSG_EXCESSIVE && 1737 debug_level != MSG_MSGDUMP && 1738 debug_level != MSG_DEBUG && 1739 debug_level != MSG_INFO && 1740 debug_level != MSG_WARNING && 1741 debug_level != MSG_ERROR) 1742 return -1; 1743 1744 old_level = wpa_debug_level; 1745 old_timestamp = wpa_debug_timestamp; 1746 old_show_keys = wpa_debug_show_keys; 1747 1748 wpa_debug_level = debug_level; 1749 wpa_debug_timestamp = debug_timestamp ? 1 : 0; 1750 wpa_debug_show_keys = debug_show_keys ? 1 : 0; 1751 1752 if (wpa_debug_level != old_level) 1753 wpas_notify_debug_level_changed(global); 1754 if (wpa_debug_timestamp != old_timestamp) 1755 wpas_notify_debug_timestamp_changed(global); 1756 if (wpa_debug_show_keys != old_show_keys) 1757 wpas_notify_debug_show_keys_changed(global); 1758 1759 return 0; 1760} 1761 1762 1763/** 1764 * wpa_supplicant_get_ssid - Get a pointer to the current network structure 1765 * @wpa_s: Pointer to wpa_supplicant data 1766 * Returns: A pointer to the current network structure or %NULL on failure 1767 */ 1768struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s) 1769{ 1770 struct wpa_ssid *entry; 1771 u8 ssid[MAX_SSID_LEN]; 1772 int res; 1773 size_t ssid_len; 1774 u8 bssid[ETH_ALEN]; 1775 int wired; 1776 1777 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) { 1778 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) { 1779 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from " 1780 "MLME"); 1781 return NULL; 1782 } 1783 } else { 1784 res = wpa_drv_get_ssid(wpa_s, ssid); 1785 if (res < 0) { 1786 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from " 1787 "driver"); 1788 return NULL; 1789 } 1790 ssid_len = res; 1791 } 1792 1793 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) 1794 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN); 1795 else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) { 1796 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from " 1797 "driver"); 1798 return NULL; 1799 } 1800 1801 wired = wpa_s->conf->ap_scan == 0 && 1802 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED); 1803 1804 entry = wpa_s->conf->ssid; 1805 while (entry) { 1806 if (!entry->disabled && 1807 ((ssid_len == entry->ssid_len && 1808 os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) && 1809 (!entry->bssid_set || 1810 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)) 1811 return entry; 1812#ifdef CONFIG_WPS 1813 if (!entry->disabled && 1814 (entry->key_mgmt & WPA_KEY_MGMT_WPS) && 1815 (entry->ssid == NULL || entry->ssid_len == 0) && 1816 (!entry->bssid_set || 1817 os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)) 1818 return entry; 1819#endif /* CONFIG_WPS */ 1820 entry = entry->next; 1821 } 1822 1823 return NULL; 1824} 1825 1826 1827static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s, 1828 const char *name) 1829{ 1830 int i; 1831 size_t len; 1832 const char *pos, *driver = name; 1833 1834 if (wpa_s == NULL) 1835 return -1; 1836 1837 if (wpa_drivers[0] == NULL) { 1838 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into " 1839 "wpa_supplicant"); 1840 return -1; 1841 } 1842 1843 if (name == NULL) { 1844 /* default to first driver in the list */ 1845 wpa_s->driver = wpa_drivers[0]; 1846 wpa_s->global_drv_priv = wpa_s->global->drv_priv[0]; 1847 return 0; 1848 } 1849 1850 do { 1851 pos = os_strchr(driver, ','); 1852 if (pos) 1853 len = pos - driver; 1854 else 1855 len = os_strlen(driver); 1856 1857 for (i = 0; wpa_drivers[i]; i++) { 1858 if (os_strlen(wpa_drivers[i]->name) == len && 1859 os_strncmp(driver, wpa_drivers[i]->name, len) == 1860 0) { 1861 wpa_s->driver = wpa_drivers[i]; 1862 wpa_s->global_drv_priv = 1863 wpa_s->global->drv_priv[i]; 1864 return 0; 1865 } 1866 } 1867 1868 driver = pos + 1; 1869 } while (pos); 1870 1871 wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name); 1872 return -1; 1873} 1874 1875 1876/** 1877 * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant 1878 * @ctx: Context pointer (wpa_s); this is the ctx variable registered 1879 * with struct wpa_driver_ops::init() 1880 * @src_addr: Source address of the EAPOL frame 1881 * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header) 1882 * @len: Length of the EAPOL data 1883 * 1884 * This function is called for each received EAPOL frame. Most driver 1885 * interfaces rely on more generic OS mechanism for receiving frames through 1886 * l2_packet, but if such a mechanism is not available, the driver wrapper may 1887 * take care of received EAPOL frames and deliver them to the core supplicant 1888 * code by calling this function. 1889 */ 1890void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr, 1891 const u8 *buf, size_t len) 1892{ 1893 struct wpa_supplicant *wpa_s = ctx; 1894 1895 wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr)); 1896 wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len); 1897 1898 if (wpa_s->wpa_state < WPA_ASSOCIATED) { 1899 /* 1900 * There is possible race condition between receiving the 1901 * association event and the EAPOL frame since they are coming 1902 * through different paths from the driver. In order to avoid 1903 * issues in trying to process the EAPOL frame before receiving 1904 * association information, lets queue it for processing until 1905 * the association event is received. 1906 */ 1907 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing " 1908 "of received EAPOL frame"); 1909 wpabuf_free(wpa_s->pending_eapol_rx); 1910 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len); 1911 if (wpa_s->pending_eapol_rx) { 1912 os_get_time(&wpa_s->pending_eapol_rx_time); 1913 os_memcpy(wpa_s->pending_eapol_rx_src, src_addr, 1914 ETH_ALEN); 1915 } 1916 return; 1917 } 1918 1919#ifdef CONFIG_AP 1920 if (wpa_s->ap_iface) { 1921 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len); 1922 return; 1923 } 1924#endif /* CONFIG_AP */ 1925 1926 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) { 1927 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since " 1928 "no key management is configured"); 1929 return; 1930 } 1931 1932 if (wpa_s->eapol_received == 0 && 1933 (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) || 1934 !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || 1935 wpa_s->wpa_state != WPA_COMPLETED) && 1936 (wpa_s->current_ssid == NULL || 1937 wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) { 1938 /* Timeout for completing IEEE 802.1X and WPA authentication */ 1939 wpa_supplicant_req_auth_timeout( 1940 wpa_s, 1941 (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) || 1942 wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA || 1943 wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ? 1944 70 : 10, 0); 1945 } 1946 wpa_s->eapol_received++; 1947 1948 if (wpa_s->countermeasures) { 1949 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped " 1950 "EAPOL packet"); 1951 return; 1952 } 1953 1954#ifdef CONFIG_IBSS_RSN 1955 if (wpa_s->current_ssid && 1956 wpa_s->current_ssid->mode == WPAS_MODE_IBSS) { 1957 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len); 1958 return; 1959 } 1960#endif /* CONFIG_IBSS_RSN */ 1961 1962 /* Source address of the incoming EAPOL frame could be compared to the 1963 * current BSSID. However, it is possible that a centralized 1964 * Authenticator could be using another MAC address than the BSSID of 1965 * an AP, so just allow any address to be used for now. The replies are 1966 * still sent to the current BSSID (if available), though. */ 1967 1968 os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN); 1969 if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) && 1970 eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0) 1971 return; 1972 wpa_drv_poll(wpa_s); 1973 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE)) 1974 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len); 1975 else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) { 1976 /* 1977 * Set portValid = TRUE here since we are going to skip 4-way 1978 * handshake processing which would normally set portValid. We 1979 * need this to allow the EAPOL state machines to be completed 1980 * without going through EAPOL-Key handshake. 1981 */ 1982 eapol_sm_notify_portValid(wpa_s->eapol, TRUE); 1983 } 1984} 1985 1986 1987/** 1988 * wpa_supplicant_driver_init - Initialize driver interface parameters 1989 * @wpa_s: Pointer to wpa_supplicant data 1990 * Returns: 0 on success, -1 on failure 1991 * 1992 * This function is called to initialize driver interface parameters. 1993 * wpa_drv_init() must have been called before this function to initialize the 1994 * driver interface. 1995 */ 1996int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s) 1997{ 1998 static int interface_count = 0; 1999 2000 if (wpa_s->driver->send_eapol) { 2001 const u8 *addr = wpa_drv_get_mac_addr(wpa_s); 2002 if (addr) 2003 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN); 2004 } else if (!(wpa_s->drv_flags & 2005 WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) { 2006 wpa_s->l2 = l2_packet_init(wpa_s->ifname, 2007 wpa_drv_get_mac_addr(wpa_s), 2008 ETH_P_EAPOL, 2009 wpa_supplicant_rx_eapol, wpa_s, 0); 2010 if (wpa_s->l2 == NULL) 2011 return -1; 2012 } else { 2013 const u8 *addr = wpa_drv_get_mac_addr(wpa_s); 2014 if (addr) 2015 os_memcpy(wpa_s->own_addr, addr, ETH_ALEN); 2016 } 2017 2018 if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) { 2019 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address"); 2020 return -1; 2021 } 2022 2023 wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR, 2024 MAC2STR(wpa_s->own_addr)); 2025 2026 if (wpa_s->bridge_ifname[0]) { 2027 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge " 2028 "interface '%s'", wpa_s->bridge_ifname); 2029 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname, 2030 wpa_s->own_addr, 2031 ETH_P_EAPOL, 2032 wpa_supplicant_rx_eapol, wpa_s, 2033 0); 2034 if (wpa_s->l2_br == NULL) { 2035 wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet " 2036 "connection for the bridge interface '%s'", 2037 wpa_s->bridge_ifname); 2038 return -1; 2039 } 2040 } 2041 2042 wpa_clear_keys(wpa_s, NULL); 2043 2044 /* Make sure that TKIP countermeasures are not left enabled (could 2045 * happen if wpa_supplicant is killed during countermeasures. */ 2046 wpa_drv_set_countermeasures(wpa_s, 0); 2047 2048 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver"); 2049 wpa_drv_flush_pmkid(wpa_s); 2050 2051 wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN; 2052 if (wpa_supplicant_enabled_networks(wpa_s->conf)) { 2053 wpa_supplicant_req_scan(wpa_s, interface_count, 100000); 2054 interface_count++; 2055 } else 2056 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE); 2057 2058 return 0; 2059} 2060 2061 2062static int wpa_supplicant_daemon(const char *pid_file) 2063{ 2064 wpa_printf(MSG_DEBUG, "Daemonize.."); 2065 return os_daemonize(pid_file); 2066} 2067 2068 2069static struct wpa_supplicant * wpa_supplicant_alloc(void) 2070{ 2071 struct wpa_supplicant *wpa_s; 2072 2073 wpa_s = os_zalloc(sizeof(*wpa_s)); 2074 if (wpa_s == NULL) 2075 return NULL; 2076 wpa_s->scan_req = 1; 2077 wpa_s->scan_interval = 5; 2078 wpa_s->new_connection = 1; 2079 wpa_s->parent = wpa_s; 2080 2081 return wpa_s; 2082} 2083 2084 2085static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s, 2086 struct wpa_interface *iface) 2087{ 2088 const char *ifname, *driver; 2089 struct wpa_driver_capa capa; 2090 2091 wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver " 2092 "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname, 2093 iface->confname ? iface->confname : "N/A", 2094 iface->driver ? iface->driver : "default", 2095 iface->ctrl_interface ? iface->ctrl_interface : "N/A", 2096 iface->bridge_ifname ? iface->bridge_ifname : "N/A"); 2097 2098 if (iface->confname) { 2099#ifdef CONFIG_BACKEND_FILE 2100 wpa_s->confname = os_rel2abs_path(iface->confname); 2101 if (wpa_s->confname == NULL) { 2102 wpa_printf(MSG_ERROR, "Failed to get absolute path " 2103 "for configuration file '%s'.", 2104 iface->confname); 2105 return -1; 2106 } 2107 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'", 2108 iface->confname, wpa_s->confname); 2109#else /* CONFIG_BACKEND_FILE */ 2110 wpa_s->confname = os_strdup(iface->confname); 2111#endif /* CONFIG_BACKEND_FILE */ 2112 wpa_s->conf = wpa_config_read(wpa_s->confname); 2113 if (wpa_s->conf == NULL) { 2114 wpa_printf(MSG_ERROR, "Failed to read or parse " 2115 "configuration '%s'.", wpa_s->confname); 2116 return -1; 2117 } 2118 2119 /* 2120 * Override ctrl_interface and driver_param if set on command 2121 * line. 2122 */ 2123 if (iface->ctrl_interface) { 2124 os_free(wpa_s->conf->ctrl_interface); 2125 wpa_s->conf->ctrl_interface = 2126 os_strdup(iface->ctrl_interface); 2127 } 2128 2129 if (iface->driver_param) { 2130 os_free(wpa_s->conf->driver_param); 2131 wpa_s->conf->driver_param = 2132 os_strdup(iface->driver_param); 2133 } 2134 } else 2135 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface, 2136 iface->driver_param); 2137 2138 if (wpa_s->conf == NULL) { 2139 wpa_printf(MSG_ERROR, "\nNo configuration found."); 2140 return -1; 2141 } 2142 2143 if (iface->ifname == NULL) { 2144 wpa_printf(MSG_ERROR, "\nInterface name is required."); 2145 return -1; 2146 } 2147 if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) { 2148 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.", 2149 iface->ifname); 2150 return -1; 2151 } 2152 os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname)); 2153 2154 if (iface->bridge_ifname) { 2155 if (os_strlen(iface->bridge_ifname) >= 2156 sizeof(wpa_s->bridge_ifname)) { 2157 wpa_printf(MSG_ERROR, "\nToo long bridge interface " 2158 "name '%s'.", iface->bridge_ifname); 2159 return -1; 2160 } 2161 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname, 2162 sizeof(wpa_s->bridge_ifname)); 2163 } 2164 2165 /* RSNA Supplicant Key Management - INITIALIZE */ 2166 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE); 2167 eapol_sm_notify_portValid(wpa_s->eapol, FALSE); 2168 2169 /* Initialize driver interface and register driver event handler before 2170 * L2 receive handler so that association events are processed before 2171 * EAPOL-Key packets if both become available for the same select() 2172 * call. */ 2173 driver = iface->driver; 2174next_driver: 2175 if (wpa_supplicant_set_driver(wpa_s, driver) < 0) 2176 return -1; 2177 2178 wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname); 2179 if (wpa_s->drv_priv == NULL) { 2180 const char *pos; 2181 pos = driver ? os_strchr(driver, ',') : NULL; 2182 if (pos) { 2183 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize " 2184 "driver interface - try next driver wrapper"); 2185 driver = pos + 1; 2186 goto next_driver; 2187 } 2188 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver " 2189 "interface"); 2190 return -1; 2191 } 2192 if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) { 2193 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected " 2194 "driver_param '%s'", wpa_s->conf->driver_param); 2195 return -1; 2196 } 2197 2198 ifname = wpa_drv_get_ifname(wpa_s); 2199 if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) { 2200 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced " 2201 "interface name with '%s'", ifname); 2202 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname)); 2203 } 2204 2205 if (wpa_supplicant_init_wpa(wpa_s) < 0) 2206 return -1; 2207 2208 wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname, 2209 wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname : 2210 NULL); 2211 wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth); 2212 2213 if (wpa_s->conf->dot11RSNAConfigPMKLifetime && 2214 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME, 2215 wpa_s->conf->dot11RSNAConfigPMKLifetime)) { 2216 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for " 2217 "dot11RSNAConfigPMKLifetime"); 2218 return -1; 2219 } 2220 2221 if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold && 2222 wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD, 2223 wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) { 2224 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for " 2225 "dot11RSNAConfigPMKReauthThreshold"); 2226 return -1; 2227 } 2228 2229 if (wpa_s->conf->dot11RSNAConfigSATimeout && 2230 wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT, 2231 wpa_s->conf->dot11RSNAConfigSATimeout)) { 2232 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for " 2233 "dot11RSNAConfigSATimeout"); 2234 return -1; 2235 } 2236 2237 if (wpa_drv_get_capa(wpa_s, &capa) == 0) { 2238 wpa_s->drv_flags = capa.flags; 2239 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) { 2240 if (ieee80211_sta_init(wpa_s)) 2241 return -1; 2242 } 2243 wpa_s->max_scan_ssids = capa.max_scan_ssids; 2244 wpa_s->max_remain_on_chan = capa.max_remain_on_chan; 2245 wpa_s->max_stations = capa.max_stations; 2246 } 2247 if (wpa_s->max_remain_on_chan == 0) 2248 wpa_s->max_remain_on_chan = 1000; 2249 2250 if (wpa_supplicant_driver_init(wpa_s) < 0) 2251 return -1; 2252 2253#ifdef CONFIG_TDLS 2254 if (wpa_tdls_init(wpa_s->wpa)) 2255 return -1; 2256#endif /* CONFIG_TDLS */ 2257 2258 if (wpa_s->conf->country[0] && wpa_s->conf->country[1] && 2259 wpa_drv_set_country(wpa_s, wpa_s->conf->country)) { 2260 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country"); 2261 return -1; 2262 } 2263 2264 wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr); 2265 2266 if (wpas_wps_init(wpa_s)) 2267 return -1; 2268 2269 if (wpa_supplicant_init_eapol(wpa_s) < 0) 2270 return -1; 2271 wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol); 2272 2273 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s); 2274 if (wpa_s->ctrl_iface == NULL) { 2275 wpa_printf(MSG_ERROR, 2276 "Failed to initialize control interface '%s'.\n" 2277 "You may have another wpa_supplicant process " 2278 "already running or the file was\n" 2279 "left by an unclean termination of wpa_supplicant " 2280 "in which case you will need\n" 2281 "to manually remove this file before starting " 2282 "wpa_supplicant again.\n", 2283 wpa_s->conf->ctrl_interface); 2284 return -1; 2285 } 2286 2287#ifdef CONFIG_P2P 2288 if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) { 2289 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P"); 2290 return -1; 2291 } 2292#endif /* CONFIG_P2P */ 2293 2294 if (wpa_bss_init(wpa_s) < 0) 2295 return -1; 2296 2297 return 0; 2298} 2299 2300 2301static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s, 2302 int notify, int terminate) 2303{ 2304 if (wpa_s->drv_priv) { 2305 wpa_supplicant_deauthenticate(wpa_s, 2306 WLAN_REASON_DEAUTH_LEAVING); 2307 2308 wpa_drv_set_countermeasures(wpa_s, 0); 2309 wpa_clear_keys(wpa_s, NULL); 2310 } 2311 2312 wpa_supplicant_cleanup(wpa_s); 2313 2314 if (wpa_s->drv_priv) 2315 wpa_drv_deinit(wpa_s); 2316 2317 if (notify) 2318 wpas_notify_iface_removed(wpa_s); 2319 2320/** 2321 * The wpa_drv_deinit call after sending TERMINATING to the framework causes 2322 * race condition with the start of hostapd. 2323 * This has been moved out of wpa_supplicant_cleanup(). Send the control 2324 * message and free config after the deinit. 2325 */ 2326 if (terminate) 2327 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING); 2328 2329 if (wpa_s->ctrl_iface) { 2330 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface); 2331 wpa_s->ctrl_iface = NULL; 2332 } 2333 2334 if (wpa_s->conf != NULL) { 2335 wpa_config_free(wpa_s->conf); 2336 wpa_s->conf = NULL; 2337 } 2338} 2339 2340 2341/** 2342 * wpa_supplicant_add_iface - Add a new network interface 2343 * @global: Pointer to global data from wpa_supplicant_init() 2344 * @iface: Interface configuration options 2345 * Returns: Pointer to the created interface or %NULL on failure 2346 * 2347 * This function is used to add new network interfaces for %wpa_supplicant. 2348 * This can be called before wpa_supplicant_run() to add interfaces before the 2349 * main event loop has been started. In addition, new interfaces can be added 2350 * dynamically while %wpa_supplicant is already running. This could happen, 2351 * e.g., when a hotplug network adapter is inserted. 2352 */ 2353struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global, 2354 struct wpa_interface *iface) 2355{ 2356 struct wpa_supplicant *wpa_s; 2357 struct wpa_interface t_iface; 2358 struct wpa_ssid *ssid; 2359 2360 if (global == NULL || iface == NULL) 2361 return NULL; 2362 2363 wpa_s = wpa_supplicant_alloc(); 2364 if (wpa_s == NULL) 2365 return NULL; 2366 2367 wpa_s->global = global; 2368 2369 t_iface = *iface; 2370 if (global->params.override_driver) { 2371 wpa_printf(MSG_DEBUG, "Override interface parameter: driver " 2372 "('%s' -> '%s')", 2373 iface->driver, global->params.override_driver); 2374 t_iface.driver = global->params.override_driver; 2375 } 2376 if (global->params.override_ctrl_interface) { 2377 wpa_printf(MSG_DEBUG, "Override interface parameter: " 2378 "ctrl_interface ('%s' -> '%s')", 2379 iface->ctrl_interface, 2380 global->params.override_ctrl_interface); 2381 t_iface.ctrl_interface = 2382 global->params.override_ctrl_interface; 2383 } 2384 if (wpa_supplicant_init_iface(wpa_s, &t_iface)) { 2385 wpa_printf(MSG_DEBUG, "Failed to add interface %s", 2386 iface->ifname); 2387 wpa_supplicant_deinit_iface(wpa_s, 0, 0); 2388 os_free(wpa_s); 2389 return NULL; 2390 } 2391 2392 /* Notify the control interfaces about new iface */ 2393 if (wpas_notify_iface_added(wpa_s)) { 2394 wpa_supplicant_deinit_iface(wpa_s, 1, 0); 2395 os_free(wpa_s); 2396 return NULL; 2397 } 2398 2399 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) 2400 wpas_notify_network_added(wpa_s, ssid); 2401 2402 wpa_s->next = global->ifaces; 2403 global->ifaces = wpa_s; 2404 2405 wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname); 2406 2407 return wpa_s; 2408} 2409 2410 2411/** 2412 * wpa_supplicant_remove_iface - Remove a network interface 2413 * @global: Pointer to global data from wpa_supplicant_init() 2414 * @wpa_s: Pointer to the network interface to be removed 2415 * Returns: 0 if interface was removed, -1 if interface was not found 2416 * 2417 * This function can be used to dynamically remove network interfaces from 2418 * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In 2419 * addition, this function is used to remove all remaining interfaces when 2420 * %wpa_supplicant is terminated. 2421 */ 2422int wpa_supplicant_remove_iface(struct wpa_global *global, 2423 struct wpa_supplicant *wpa_s, 2424 int terminate) 2425{ 2426 struct wpa_supplicant *prev; 2427 2428 /* Remove interface from the global list of interfaces */ 2429 prev = global->ifaces; 2430 if (prev == wpa_s) { 2431 global->ifaces = wpa_s->next; 2432 } else { 2433 while (prev && prev->next != wpa_s) 2434 prev = prev->next; 2435 if (prev == NULL) 2436 return -1; 2437 prev->next = wpa_s->next; 2438 } 2439 2440 wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname); 2441 2442 if (global->p2p_group_formation == wpa_s) 2443 global->p2p_group_formation = NULL; 2444 wpa_supplicant_deinit_iface(wpa_s, 1, terminate); 2445 os_free(wpa_s); 2446 2447 return 0; 2448} 2449 2450 2451/** 2452 * wpa_supplicant_get_eap_mode - Get the current EAP mode 2453 * @wpa_s: Pointer to the network interface 2454 * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found 2455 */ 2456const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s) 2457{ 2458 const char *eapol_method; 2459 2460 if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 && 2461 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) { 2462 return "NO-EAP"; 2463 } 2464 2465 eapol_method = eapol_sm_get_method_name(wpa_s->eapol); 2466 if (eapol_method == NULL) 2467 return "UNKNOWN-EAP"; 2468 2469 return eapol_method; 2470} 2471 2472 2473/** 2474 * wpa_supplicant_get_iface - Get a new network interface 2475 * @global: Pointer to global data from wpa_supplicant_init() 2476 * @ifname: Interface name 2477 * Returns: Pointer to the interface or %NULL if not found 2478 */ 2479struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global, 2480 const char *ifname) 2481{ 2482 struct wpa_supplicant *wpa_s; 2483 2484 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { 2485 if (os_strcmp(wpa_s->ifname, ifname) == 0) 2486 return wpa_s; 2487 } 2488 return NULL; 2489} 2490 2491 2492#ifndef CONFIG_NO_WPA_MSG 2493static const char * wpa_supplicant_msg_ifname_cb(void *ctx) 2494{ 2495 struct wpa_supplicant *wpa_s = ctx; 2496 if (wpa_s == NULL) 2497 return NULL; 2498 return wpa_s->ifname; 2499} 2500#endif /* CONFIG_NO_WPA_MSG */ 2501 2502 2503/** 2504 * wpa_supplicant_init - Initialize %wpa_supplicant 2505 * @params: Parameters for %wpa_supplicant 2506 * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure 2507 * 2508 * This function is used to initialize %wpa_supplicant. After successful 2509 * initialization, the returned data pointer can be used to add and remove 2510 * network interfaces, and eventually, to deinitialize %wpa_supplicant. 2511 */ 2512struct wpa_global * wpa_supplicant_init(struct wpa_params *params) 2513{ 2514 struct wpa_global *global; 2515 int ret, i; 2516 2517 if (params == NULL) 2518 return NULL; 2519 2520#ifndef CONFIG_NO_WPA_MSG 2521 wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb); 2522#endif /* CONFIG_NO_WPA_MSG */ 2523 2524 wpa_debug_open_file(params->wpa_debug_file_path); 2525 if (params->wpa_debug_syslog) 2526 wpa_debug_open_syslog(); 2527 2528 ret = eap_register_methods(); 2529 if (ret) { 2530 wpa_printf(MSG_ERROR, "Failed to register EAP methods"); 2531 if (ret == -2) 2532 wpa_printf(MSG_ERROR, "Two or more EAP methods used " 2533 "the same EAP type."); 2534 return NULL; 2535 } 2536 2537 global = os_zalloc(sizeof(*global)); 2538 if (global == NULL) 2539 return NULL; 2540 dl_list_init(&global->p2p_srv_bonjour); 2541 dl_list_init(&global->p2p_srv_upnp); 2542 global->params.daemonize = params->daemonize; 2543 global->params.wait_for_monitor = params->wait_for_monitor; 2544 global->params.dbus_ctrl_interface = params->dbus_ctrl_interface; 2545 if (params->pid_file) 2546 global->params.pid_file = os_strdup(params->pid_file); 2547 if (params->ctrl_interface) 2548 global->params.ctrl_interface = 2549 os_strdup(params->ctrl_interface); 2550 if (params->override_driver) 2551 global->params.override_driver = 2552 os_strdup(params->override_driver); 2553 if (params->override_ctrl_interface) 2554 global->params.override_ctrl_interface = 2555 os_strdup(params->override_ctrl_interface); 2556 wpa_debug_level = global->params.wpa_debug_level = 2557 params->wpa_debug_level; 2558 wpa_debug_show_keys = global->params.wpa_debug_show_keys = 2559 params->wpa_debug_show_keys; 2560 wpa_debug_timestamp = global->params.wpa_debug_timestamp = 2561 params->wpa_debug_timestamp; 2562 2563 wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR); 2564 2565 if (eloop_init()) { 2566 wpa_printf(MSG_ERROR, "Failed to initialize event loop"); 2567 wpa_supplicant_deinit(global); 2568 return NULL; 2569 } 2570 2571 random_init(params->entropy_file); 2572 2573 global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global); 2574 if (global->ctrl_iface == NULL) { 2575 wpa_supplicant_deinit(global); 2576 return NULL; 2577 } 2578 2579 if (wpas_notify_supplicant_initialized(global)) { 2580 wpa_supplicant_deinit(global); 2581 return NULL; 2582 } 2583 2584 for (i = 0; wpa_drivers[i]; i++) 2585 global->drv_count++; 2586 if (global->drv_count == 0) { 2587 wpa_printf(MSG_ERROR, "No drivers enabled"); 2588 wpa_supplicant_deinit(global); 2589 return NULL; 2590 } 2591 global->drv_priv = os_zalloc(global->drv_count * sizeof(void *)); 2592 if (global->drv_priv == NULL) { 2593 wpa_supplicant_deinit(global); 2594 return NULL; 2595 } 2596 for (i = 0; wpa_drivers[i]; i++) { 2597 if (!wpa_drivers[i]->global_init) 2598 continue; 2599 global->drv_priv[i] = wpa_drivers[i]->global_init(); 2600 if (global->drv_priv[i] == NULL) { 2601 wpa_printf(MSG_ERROR, "Failed to initialize driver " 2602 "'%s'", wpa_drivers[i]->name); 2603 wpa_supplicant_deinit(global); 2604 return NULL; 2605 } 2606 } 2607 2608 return global; 2609} 2610 2611 2612/** 2613 * wpa_supplicant_run - Run the %wpa_supplicant main event loop 2614 * @global: Pointer to global data from wpa_supplicant_init() 2615 * Returns: 0 after successful event loop run, -1 on failure 2616 * 2617 * This function starts the main event loop and continues running as long as 2618 * there are any remaining events. In most cases, this function is running as 2619 * long as the %wpa_supplicant process in still in use. 2620 */ 2621int wpa_supplicant_run(struct wpa_global *global) 2622{ 2623 struct wpa_supplicant *wpa_s; 2624 2625 if (global->params.daemonize && 2626 wpa_supplicant_daemon(global->params.pid_file)) 2627 return -1; 2628 2629 if (global->params.wait_for_monitor) { 2630 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) 2631 if (wpa_s->ctrl_iface) 2632 wpa_supplicant_ctrl_iface_wait( 2633 wpa_s->ctrl_iface); 2634 } 2635 2636 eloop_register_signal_terminate(wpa_supplicant_terminate, global); 2637 eloop_register_signal_reconfig(wpa_supplicant_reconfig, global); 2638 2639 eloop_run(); 2640 2641 return 0; 2642} 2643 2644 2645/** 2646 * wpa_supplicant_deinit - Deinitialize %wpa_supplicant 2647 * @global: Pointer to global data from wpa_supplicant_init() 2648 * 2649 * This function is called to deinitialize %wpa_supplicant and to free all 2650 * allocated resources. Remaining network interfaces will also be removed. 2651 */ 2652void wpa_supplicant_deinit(struct wpa_global *global) 2653{ 2654 int i; 2655 2656 if (global == NULL) 2657 return; 2658#ifdef CONFIG_P2P 2659 wpas_p2p_deinit_global(global); 2660#endif /* CONFIG_P2P */ 2661 2662 while (global->ifaces) 2663 wpa_supplicant_remove_iface(global, global->ifaces, 1); 2664 2665 if (global->ctrl_iface) 2666 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface); 2667 2668 wpas_notify_supplicant_deinitialized(global); 2669 2670 eap_peer_unregister_methods(); 2671#ifdef CONFIG_AP 2672 eap_server_unregister_methods(); 2673#endif /* CONFIG_AP */ 2674 2675 for (i = 0; wpa_drivers[i] && global->drv_priv; i++) { 2676 if (!global->drv_priv[i]) 2677 continue; 2678 wpa_drivers[i]->global_deinit(global->drv_priv[i]); 2679 } 2680 os_free(global->drv_priv); 2681 2682 random_deinit(); 2683 2684 eloop_destroy(); 2685 2686 if (global->params.pid_file) { 2687 os_daemonize_terminate(global->params.pid_file); 2688 os_free(global->params.pid_file); 2689 } 2690 os_free(global->params.ctrl_interface); 2691 os_free(global->params.override_driver); 2692 os_free(global->params.override_ctrl_interface); 2693 2694 os_free(global); 2695 wpa_debug_close_syslog(); 2696 wpa_debug_close_file(); 2697} 2698 2699 2700void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s) 2701{ 2702 if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) && 2703 wpa_s->conf->country[0] && wpa_s->conf->country[1]) { 2704 char country[3]; 2705 country[0] = wpa_s->conf->country[0]; 2706 country[1] = wpa_s->conf->country[1]; 2707 country[2] = '\0'; 2708 if (wpa_drv_set_country(wpa_s, country) < 0) { 2709 wpa_printf(MSG_ERROR, "Failed to set country code " 2710 "'%s'", country); 2711 } 2712 } 2713 2714#ifdef CONFIG_WPS 2715 wpas_wps_update_config(wpa_s); 2716#endif /* CONFIG_WPS */ 2717 2718#ifdef CONFIG_P2P 2719 wpas_p2p_update_config(wpa_s); 2720#endif /* CONFIG_P2P */ 2721 2722 wpa_s->conf->changed_parameters = 0; 2723} 2724 2725 2726void ieee80211_sta_free_hw_features(struct hostapd_hw_modes *hw_features, 2727 size_t num_hw_features) 2728{ 2729 size_t i; 2730 2731 if (hw_features == NULL) 2732 return; 2733 2734 for (i = 0; i < num_hw_features; i++) { 2735 os_free(hw_features[i].channels); 2736 os_free(hw_features[i].rates); 2737 } 2738 2739 os_free(hw_features); 2740} 2741 2742 2743static void add_freq(int *freqs, int *num_freqs, int freq) 2744{ 2745 int i; 2746 2747 for (i = 0; i < *num_freqs; i++) { 2748 if (freqs[i] == freq) 2749 return; 2750 } 2751 2752 freqs[*num_freqs] = freq; 2753 (*num_freqs)++; 2754} 2755 2756 2757static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s) 2758{ 2759 struct wpa_bss *bss, *cbss; 2760 const int max_freqs = 10; 2761 int *freqs; 2762 int num_freqs = 0; 2763 2764 freqs = os_zalloc(sizeof(int) * (max_freqs + 1)); 2765 if (freqs == NULL) 2766 return NULL; 2767 2768 cbss = wpa_s->current_bss; 2769 2770 dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) { 2771 if (bss == cbss) 2772 continue; 2773 if (bss->ssid_len == cbss->ssid_len && 2774 os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 && 2775 wpa_blacklist_get(wpa_s, bss->bssid) == NULL) { 2776 add_freq(freqs, &num_freqs, bss->freq); 2777 if (num_freqs == max_freqs) 2778 break; 2779 } 2780 } 2781 2782 if (num_freqs == 0) { 2783 os_free(freqs); 2784 freqs = NULL; 2785 } 2786 2787 return freqs; 2788} 2789 2790 2791void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid) 2792{ 2793 int timeout; 2794 int count; 2795 int *freqs = NULL; 2796 2797 /* 2798 * Add the failed BSSID into the blacklist and speed up next scan 2799 * attempt if there could be other APs that could accept association. 2800 * The current blacklist count indicates how many times we have tried 2801 * connecting to this AP and multiple attempts mean that other APs are 2802 * either not available or has already been tried, so that we can start 2803 * increasing the delay here to avoid constant scanning. 2804 */ 2805 count = wpa_blacklist_add(wpa_s, bssid); 2806 if (count == 1 && wpa_s->current_bss) { 2807 /* 2808 * This BSS was not in the blacklist before. If there is 2809 * another BSS available for the same ESS, we should try that 2810 * next. Otherwise, we may as well try this one once more 2811 * before allowing other, likely worse, ESSes to be considered. 2812 */ 2813 freqs = get_bss_freqs_in_ess(wpa_s); 2814 if (freqs) { 2815 wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS " 2816 "has been seen; try it next"); 2817 wpa_blacklist_add(wpa_s, bssid); 2818 /* 2819 * On the next scan, go through only the known channels 2820 * used in this ESS based on previous scans to speed up 2821 * common load balancing use case. 2822 */ 2823 os_free(wpa_s->next_scan_freqs); 2824 wpa_s->next_scan_freqs = freqs; 2825 } 2826 } 2827 2828 switch (count) { 2829 case 1: 2830 timeout = 100; 2831 break; 2832 case 2: 2833 timeout = 500; 2834 break; 2835 case 3: 2836 timeout = 1000; 2837 break; 2838 default: 2839 timeout = 5000; 2840 } 2841 2842 /* 2843 * TODO: if more than one possible AP is available in scan results, 2844 * could try the other ones before requesting a new scan. 2845 */ 2846 wpa_supplicant_req_scan(wpa_s, timeout / 1000, 2847 1000 * (timeout % 1000)); 2848} 2849