vcs.maemo.org Git - wpasupplicant/blob - wpa_supplicant/wpa_supplicant.c

   1 /*
   2  * WPA Supplicant
   3  * Copyright (c) 2003-2009, 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 "eapol_supp/eapol_supp_sm.h"
  23 #include "eap_peer/eap.h"
  24 #include "wpa.h"
  25 #include "eloop.h"
  26 #include "config.h"
  27 #include "l2_packet/l2_packet.h"
  28 #include "wpa_supplicant_i.h"
  29 #include "driver_i.h"
  30 #include "ctrl_iface.h"
  31 #include "ctrl_iface_dbus.h"
  32 #include "pcsc_funcs.h"
  33 #include "version.h"
  34 #include "preauth.h"
  35 #include "pmksa_cache.h"
  36 #include "wpa_ctrl.h"
  37 #include "mlme.h"
  38 #include "ieee802_11_defs.h"
  39 #include "blacklist.h"
  40 #include "wpas_glue.h"
  41 #include "wps_supplicant.h"
  42 #include "ibss_rsn.h"
  43 #include "sme.h"
  44 #include "ap.h"
  45
  46 const char *wpa_supplicant_version =
  47 "wpa_supplicant v" VERSION_STR "\n"
  48 "Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi> and contributors";
  49
  50 const char *wpa_supplicant_license =
  51 "This program is free software. You can distribute it and/or modify it\n"
  52 "under the terms of the GNU General Public License version 2.\n"
  53 "\n"
  54 "Alternatively, this software may be distributed under the terms of the\n"
  55 "BSD license. See README and COPYING for more details.\n"
  56 #ifdef EAP_TLS_OPENSSL
  57 "\nThis product includes software developed by the OpenSSL Project\n"
  58 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
  59 #endif /* EAP_TLS_OPENSSL */
  60 ;
  61
  62 #ifndef CONFIG_NO_STDOUT_DEBUG
  63 /* Long text divided into parts in order to fit in C89 strings size limits. */
  64 const char *wpa_supplicant_full_license1 =
  65 "This program is free software; you can redistribute it and/or modify\n"
  66 "it under the terms of the GNU General Public License version 2 as\n"
  67 "published by the Free Software Foundation.\n"
  68 "\n"
  69 "This program is distributed in the hope that it will be useful,\n"
  70 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  71 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  72 "GNU General Public License for more details.\n"
  73 "\n";
  74 const char *wpa_supplicant_full_license2 =
  75 "You should have received a copy of the GNU General Public License\n"
  76 "along with this program; if not, write to the Free Software\n"
  77 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA\n"
  78 "\n"
  79 "Alternatively, this software may be distributed under the terms of the\n"
  80 "BSD license.\n"
  81 "\n"
  82 "Redistribution and use in source and binary forms, with or without\n"
  83 "modification, are permitted provided that the following conditions are\n"
  84 "met:\n"
  85 "\n";
  86 const char *wpa_supplicant_full_license3 =
  87 "1. Redistributions of source code must retain the above copyright\n"
  88 "   notice, this list of conditions and the following disclaimer.\n"
  89 "\n"
  90 "2. Redistributions in binary form must reproduce the above copyright\n"
  91 "   notice, this list of conditions and the following disclaimer in the\n"
  92 "   documentation and/or other materials provided with the distribution.\n"
  93 "\n";
  94 const char *wpa_supplicant_full_license4 =
  95 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
  96 "   names of its contributors may be used to endorse or promote products\n"
  97 "   derived from this software without specific prior written permission.\n"
  98 "\n"
  99 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
 100 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
 101 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
 102 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
 103 const char *wpa_supplicant_full_license5 =
 104 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
 105 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
 106 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
 107 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
 108 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
 109 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
 110 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
 111 "\n";
 112 #endif /* CONFIG_NO_STDOUT_DEBUG */
 113
 114 extern int wpa_debug_level;
 115 extern int wpa_debug_show_keys;
 116 extern int wpa_debug_timestamp;
 117 extern struct wpa_driver_ops *wpa_drivers[];
 118
 119 /* Configure default/group WEP keys for static WEP */
 120 static int wpa_set_wep_keys(struct wpa_supplicant *wpa_s,
 121                             struct wpa_ssid *ssid)
 122 {
 123         int i, set = 0;
 124
 125         for (i = 0; i < NUM_WEP_KEYS; i++) {
 126                 if (ssid->wep_key_len[i] == 0)
 127                         continue;
 128
 129                 set = 1;
 130                 wpa_drv_set_key(wpa_s, WPA_ALG_WEP,
 131                                 (u8 *) "\xff\xff\xff\xff\xff\xff",
 132                                 i, i == ssid->wep_tx_keyidx, (u8 *) "", 0,
 133                                 ssid->wep_key[i], ssid->wep_key_len[i]);
 134         }
 135
 136         return set;
 137 }
 138
 139
 140 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
 141                                            struct wpa_ssid *ssid)
 142 {
 143         u8 key[32];
 144         size_t keylen;
 145         wpa_alg alg;
 146         u8 seq[6] = { 0 };
 147
 148         /* IBSS/WPA-None uses only one key (Group) for both receiving and
 149          * sending unicast and multicast packets. */
 150
 151         if (ssid->mode != IEEE80211_MODE_IBSS) {
 152                 wpa_printf(MSG_INFO, "WPA: Invalid mode %d (not IBSS/ad-hoc) "
 153                            "for WPA-None", ssid->mode);
 154                 return -1;
 155         }
 156
 157         if (!ssid->psk_set) {
 158                 wpa_printf(MSG_INFO, "WPA: No PSK configured for WPA-None");
 159                 return -1;
 160         }
 161
 162         switch (wpa_s->group_cipher) {
 163         case WPA_CIPHER_CCMP:
 164                 os_memcpy(key, ssid->psk, 16);
 165                 keylen = 16;
 166                 alg = WPA_ALG_CCMP;
 167                 break;
 168         case WPA_CIPHER_TKIP:
 169                 /* WPA-None uses the same Michael MIC key for both TX and RX */
 170                 os_memcpy(key, ssid->psk, 16 + 8);
 171                 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
 172                 keylen = 32;
 173                 alg = WPA_ALG_TKIP;
 174                 break;
 175         default:
 176                 wpa_printf(MSG_INFO, "WPA: Invalid group cipher %d for "
 177                            "WPA-None", wpa_s->group_cipher);
 178                 return -1;
 179         }
 180
 181         /* TODO: should actually remember the previously used seq#, both for TX
 182          * and RX from each STA.. */
 183
 184         return wpa_drv_set_key(wpa_s, alg, (u8 *) "\xff\xff\xff\xff\xff\xff",
 185                                0, 1, seq, 6, key, keylen);
 186 }
 187
 188
 189 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
 190 {
 191         struct wpa_supplicant *wpa_s = eloop_ctx;
 192         const u8 *bssid = wpa_s->bssid;
 193         if (is_zero_ether_addr(bssid))
 194                 bssid = wpa_s->pending_bssid;
 195         wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
 196                 MAC2STR(bssid));
 197         wpa_blacklist_add(wpa_s, bssid);
 198         wpa_sm_notify_disassoc(wpa_s->wpa);
 199         wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 200         wpa_s->reassociate = 1;
 201         wpa_supplicant_req_scan(wpa_s, 0, 0);
 202 }
 203
 204
 205 /**
 206  * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
 207  * @wpa_s: Pointer to wpa_supplicant data
 208  * @sec: Number of seconds after which to time out authentication
 209  * @usec: Number of microseconds after which to time out authentication
 210  *
 211  * This function is used to schedule a timeout for the current authentication
 212  * attempt.
 213  */
 214 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
 215                                      int sec, int usec)
 216 {
 217         if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
 218             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 219                 return;
 220
 221         wpa_msg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
 222                 "%d usec", sec, usec);
 223         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 224         eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
 225 }
 226
 227
 228 /**
 229  * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
 230  * @wpa_s: Pointer to wpa_supplicant data
 231  *
 232  * This function is used to cancel authentication timeout scheduled with
 233  * wpa_supplicant_req_auth_timeout() and it is called when authentication has
 234  * been completed.
 235  */
 236 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
 237 {
 238         wpa_msg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
 239         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 240         wpa_blacklist_del(wpa_s, wpa_s->bssid);
 241 }
 242
 243
 244 /**
 245  * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
 246  * @wpa_s: Pointer to wpa_supplicant data
 247  *
 248  * This function is used to configure EAPOL state machine based on the selected
 249  * authentication mode.
 250  */
 251 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
 252 {
 253 #ifdef IEEE8021X_EAPOL
 254         struct eapol_config eapol_conf;
 255         struct wpa_ssid *ssid = wpa_s->current_ssid;
 256
 257 #ifdef CONFIG_IBSS_RSN
 258         if (ssid->mode == IEEE80211_MODE_IBSS &&
 259             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
 260             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
 261                 /*
 262                  * RSN IBSS authentication is per-STA and we can disable the
 263                  * per-BSSID EAPOL authentication.
 264                  */
 265                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 266                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 267                 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 268                 return;
 269         }
 270 #endif /* CONFIG_IBSS_RSN */
 271
 272         eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 273         eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 274
 275         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 276             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 277                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 278         else
 279                 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
 280
 281         os_memset(&eapol_conf, 0, sizeof(eapol_conf));
 282         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 283                 eapol_conf.accept_802_1x_keys = 1;
 284                 eapol_conf.required_keys = 0;
 285                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
 286                         eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
 287                 }
 288                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
 289                         eapol_conf.required_keys |=
 290                                 EAPOL_REQUIRE_KEY_BROADCAST;
 291                 }
 292
 293                 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 294                         eapol_conf.required_keys = 0;
 295         }
 296         if (wpa_s->conf)
 297                 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
 298         eapol_conf.workaround = ssid->eap_workaround;
 299         eapol_conf.eap_disabled =
 300                 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
 301                 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 302                 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
 303         eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
 304 #endif /* IEEE8021X_EAPOL */
 305 }
 306
 307
 308 /**
 309  * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
 310  * @wpa_s: Pointer to wpa_supplicant data
 311  * @ssid: Configuration data for the network
 312  *
 313  * This function is used to configure WPA state machine and related parameters
 314  * to a mode where WPA is not enabled. This is called as part of the
 315  * authentication configuration when the selected network does not use WPA.
 316  */
 317 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 318                                        struct wpa_ssid *ssid)
 319 {
 320         int i;
 321
 322         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 323                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
 324         else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
 325                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 326         else
 327                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 328         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 329         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 330         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 331         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 332         wpa_s->group_cipher = WPA_CIPHER_NONE;
 333         wpa_s->mgmt_group_cipher = 0;
 334
 335         for (i = 0; i < NUM_WEP_KEYS; i++) {
 336                 if (ssid->wep_key_len[i] > 5) {
 337                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
 338                         wpa_s->group_cipher = WPA_CIPHER_WEP104;
 339                         break;
 340                 } else if (ssid->wep_key_len[i] > 0) {
 341                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
 342                         wpa_s->group_cipher = WPA_CIPHER_WEP40;
 343                         break;
 344                 }
 345         }
 346
 347         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
 348         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 349         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 350                          wpa_s->pairwise_cipher);
 351         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 352 #ifdef CONFIG_IEEE80211W
 353         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 354                          wpa_s->mgmt_group_cipher);
 355 #endif /* CONFIG_IEEE80211W */
 356
 357         pmksa_cache_clear_current(wpa_s->wpa);
 358 }
 359
 360
 361 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 362 {
 363         scard_deinit(wpa_s->scard);
 364         wpa_s->scard = NULL;
 365         wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
 366         eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
 367         l2_packet_deinit(wpa_s->l2);
 368         wpa_s->l2 = NULL;
 369         if (wpa_s->l2_br) {
 370                 l2_packet_deinit(wpa_s->l2_br);
 371                 wpa_s->l2_br = NULL;
 372         }
 373
 374         if (wpa_s->ctrl_iface) {
 375                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 376                 wpa_s->ctrl_iface = NULL;
 377         }
 378         if (wpa_s->conf != NULL) {
 379                 wpa_config_free(wpa_s->conf);
 380                 wpa_s->conf = NULL;
 381         }
 382
 383         os_free(wpa_s->confname);
 384         wpa_s->confname = NULL;
 385
 386         wpa_sm_set_eapol(wpa_s->wpa, NULL);
 387         eapol_sm_deinit(wpa_s->eapol);
 388         wpa_s->eapol = NULL;
 389
 390         rsn_preauth_deinit(wpa_s->wpa);
 391
 392         pmksa_candidate_free(wpa_s->wpa);
 393         wpa_sm_deinit(wpa_s->wpa);
 394         wpa_s->wpa = NULL;
 395         wpa_blacklist_clear(wpa_s);
 396
 397         wpa_scan_results_free(wpa_s->scan_res);
 398         wpa_s->scan_res = NULL;
 399
 400         wpa_supplicant_cancel_scan(wpa_s);
 401         wpa_supplicant_cancel_auth_timeout(wpa_s);
 402
 403         ieee80211_sta_deinit(wpa_s);
 404
 405         wpas_wps_deinit(wpa_s);
 406
 407 #ifdef CONFIG_IBSS_RSN
 408         ibss_rsn_deinit(wpa_s->ibss_rsn);
 409         wpa_s->ibss_rsn = NULL;
 410 #endif /* CONFIG_IBSS_RSN */
 411
 412 #ifdef CONFIG_SME
 413         os_free(wpa_s->sme.ft_ies);
 414         wpa_s->sme.ft_ies = NULL;
 415         wpa_s->sme.ft_ies_len = 0;
 416 #endif /* CONFIG_SME */
 417
 418 #ifdef CONFIG_AP
 419         wpa_supplicant_ap_deinit(wpa_s);
 420 #endif /* CONFIG_AP */
 421 }
 422
 423
 424 /**
 425  * wpa_clear_keys - Clear keys configured for the driver
 426  * @wpa_s: Pointer to wpa_supplicant data
 427  * @addr: Previously used BSSID or %NULL if not available
 428  *
 429  * This function clears the encryption keys that has been previously configured
 430  * for the driver.
 431  */
 432 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
 433 {
 434         u8 *bcast = (u8 *) "\xff\xff\xff\xff\xff\xff";
 435
 436         if (wpa_s->keys_cleared) {
 437                 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
 438                  * timing issues with keys being cleared just before new keys
 439                  * are set or just after association or something similar. This
 440                  * shows up in group key handshake failing often because of the
 441                  * client not receiving the first encrypted packets correctly.
 442                  * Skipping some of the extra key clearing steps seems to help
 443                  * in completing group key handshake more reliably. */
 444                 wpa_printf(MSG_DEBUG, "No keys have been configured - "
 445                            "skip key clearing");
 446                 return;
 447         }
 448
 449         /* MLME-DELETEKEYS.request */
 450         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 0, 0, NULL, 0, NULL, 0);
 451         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 1, 0, NULL, 0, NULL, 0);
 452         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 2, 0, NULL, 0, NULL, 0);
 453         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 3, 0, NULL, 0, NULL, 0);
 454         if (addr) {
 455                 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
 456                                 0);
 457                 /* MLME-SETPROTECTION.request(None) */
 458                 wpa_drv_mlme_setprotection(
 459                         wpa_s, addr,
 460                         MLME_SETPROTECTION_PROTECT_TYPE_NONE,
 461                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 462         }
 463         wpa_s->keys_cleared = 1;
 464 }
 465
 466
 467 /**
 468  * wpa_supplicant_state_txt - Get the connection state name as a text string
 469  * @state: State (wpa_state; WPA_*)
 470  * Returns: The state name as a printable text string
 471  */
 472 const char * wpa_supplicant_state_txt(int state)
 473 {
 474         switch (state) {
 475         case WPA_DISCONNECTED:
 476                 return "DISCONNECTED";
 477         case WPA_INACTIVE:
 478                 return "INACTIVE";
 479         case WPA_SCANNING:
 480                 return "SCANNING";
 481         case WPA_AUTHENTICATING:
 482                 return "AUTHENTICATING";
 483         case WPA_ASSOCIATING:
 484                 return "ASSOCIATING";
 485         case WPA_ASSOCIATED:
 486                 return "ASSOCIATED";
 487         case WPA_4WAY_HANDSHAKE:
 488                 return "4WAY_HANDSHAKE";
 489         case WPA_GROUP_HANDSHAKE:
 490                 return "GROUP_HANDSHAKE";
 491         case WPA_COMPLETED:
 492                 return "COMPLETED";
 493         default:
 494                 return "UNKNOWN";
 495         }
 496 }
 497
 498
 499 /**
 500  * wpa_supplicant_set_state - Set current connection state
 501  * @wpa_s: Pointer to wpa_supplicant data
 502  * @state: The new connection state
 503  *
 504  * This function is called whenever the connection state changes, e.g.,
 505  * association is completed for WPA/WPA2 4-Way Handshake is started.
 506  */
 507 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, wpa_states state)
 508 {
 509         wpa_printf(MSG_DEBUG, "State: %s -> %s",
 510                    wpa_supplicant_state_txt(wpa_s->wpa_state),
 511                    wpa_supplicant_state_txt(state));
 512
 513         wpa_supplicant_dbus_notify_state_change(wpa_s, state,
 514                                                 wpa_s->wpa_state);
 515
 516         if (state == WPA_COMPLETED && wpa_s->new_connection) {
 517 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
 518                 struct wpa_ssid *ssid = wpa_s->current_ssid;
 519                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
 520                         MACSTR " completed %s [id=%d id_str=%s]",
 521                         MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
 522                         "(reauth)" : "(auth)",
 523                         ssid ? ssid->id : -1,
 524                         ssid && ssid->id_str ? ssid->id_str : "");
 525 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
 526                 wpa_s->new_connection = 0;
 527                 wpa_s->reassociated_connection = 1;
 528                 wpa_drv_set_operstate(wpa_s, 1);
 529         } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 530                    state == WPA_ASSOCIATED) {
 531                 wpa_s->new_connection = 1;
 532                 wpa_drv_set_operstate(wpa_s, 0);
 533         }
 534         wpa_s->wpa_state = state;
 535 }
 536
 537
 538 static void wpa_supplicant_terminate(int sig, void *eloop_ctx,
 539                                      void *signal_ctx)
 540 {
 541         struct wpa_global *global = eloop_ctx;
 542         struct wpa_supplicant *wpa_s;
 543         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 544                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
 545                         "received", sig);
 546         }
 547         eloop_terminate();
 548 }
 549
 550
 551 static void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
 552 {
 553         wpa_s->pairwise_cipher = 0;
 554         wpa_s->group_cipher = 0;
 555         wpa_s->mgmt_group_cipher = 0;
 556         wpa_s->key_mgmt = 0;
 557         wpa_s->wpa_state = WPA_DISCONNECTED;
 558 }
 559
 560
 561 /**
 562  * wpa_supplicant_reload_configuration - Reload configuration data
 563  * @wpa_s: Pointer to wpa_supplicant data
 564  * Returns: 0 on success or -1 if configuration parsing failed
 565  *
 566  * This function can be used to request that the configuration data is reloaded
 567  * (e.g., after configuration file change). This function is reloading
 568  * configuration only for one interface, so this may need to be called multiple
 569  * times if %wpa_supplicant is controlling multiple interfaces and all
 570  * interfaces need reconfiguration.
 571  */
 572 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
 573 {
 574         struct wpa_config *conf;
 575         int reconf_ctrl;
 576         if (wpa_s->confname == NULL)
 577                 return -1;
 578         conf = wpa_config_read(wpa_s->confname);
 579         if (conf == NULL) {
 580                 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
 581                         "file '%s' - exiting", wpa_s->confname);
 582                 return -1;
 583         }
 584
 585         reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
 586                 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
 587                     os_strcmp(conf->ctrl_interface,
 588                               wpa_s->conf->ctrl_interface) != 0);
 589
 590         if (reconf_ctrl && wpa_s->ctrl_iface) {
 591                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 592                 wpa_s->ctrl_iface = NULL;
 593         }
 594
 595         eapol_sm_invalidate_cached_session(wpa_s->eapol);
 596         wpa_s->current_ssid = NULL;
 597         /*
 598          * TODO: should notify EAPOL SM about changes in opensc_engine_path,
 599          * pkcs11_engine_path, pkcs11_module_path.
 600          */
 601         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 602                 /*
 603                  * Clear forced success to clear EAP state for next
 604                  * authentication.
 605                  */
 606                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 607         }
 608         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 609         wpa_sm_set_config(wpa_s->wpa, NULL);
 610         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
 611         rsn_preauth_deinit(wpa_s->wpa);
 612         wpa_config_free(wpa_s->conf);
 613         wpa_s->conf = conf;
 614         if (reconf_ctrl)
 615                 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
 616
 617         wpa_supplicant_clear_status(wpa_s);
 618         wpa_s->reassociate = 1;
 619         wpa_supplicant_req_scan(wpa_s, 0, 0);
 620         wpa_msg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
 621         return 0;
 622 }
 623
 624
 625 static void wpa_supplicant_reconfig(int sig, void *eloop_ctx,
 626                                     void *signal_ctx)
 627 {
 628         struct wpa_global *global = eloop_ctx;
 629         struct wpa_supplicant *wpa_s;
 630         wpa_printf(MSG_DEBUG, "Signal %d received - reconfiguring", sig);
 631         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 632                 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
 633                         eloop_terminate();
 634                 }
 635         }
 636 }
 637
 638
 639 static wpa_cipher cipher_suite2driver(int cipher)
 640 {
 641         switch (cipher) {
 642         case WPA_CIPHER_NONE:
 643                 return CIPHER_NONE;
 644         case WPA_CIPHER_WEP40:
 645                 return CIPHER_WEP40;
 646         case WPA_CIPHER_WEP104:
 647                 return CIPHER_WEP104;
 648         case WPA_CIPHER_CCMP:
 649                 return CIPHER_CCMP;
 650         case WPA_CIPHER_TKIP:
 651         default:
 652                 return CIPHER_TKIP;
 653         }
 654 }
 655
 656
 657 static wpa_key_mgmt key_mgmt2driver(int key_mgmt)
 658 {
 659         switch (key_mgmt) {
 660         case WPA_KEY_MGMT_NONE:
 661                 return KEY_MGMT_NONE;
 662         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
 663                 return KEY_MGMT_802_1X_NO_WPA;
 664         case WPA_KEY_MGMT_IEEE8021X:
 665                 return KEY_MGMT_802_1X;
 666         case WPA_KEY_MGMT_WPA_NONE:
 667                 return KEY_MGMT_WPA_NONE;
 668         case WPA_KEY_MGMT_FT_IEEE8021X:
 669                 return KEY_MGMT_FT_802_1X;
 670         case WPA_KEY_MGMT_FT_PSK:
 671                 return KEY_MGMT_FT_PSK;
 672         case WPA_KEY_MGMT_IEEE8021X_SHA256:
 673                 return KEY_MGMT_802_1X_SHA256;
 674         case WPA_KEY_MGMT_PSK_SHA256:
 675                 return KEY_MGMT_PSK_SHA256;
 676         case WPA_KEY_MGMT_WPS:
 677                 return KEY_MGMT_WPS;
 678         case WPA_KEY_MGMT_PSK:
 679         default:
 680                 return KEY_MGMT_PSK;
 681         }
 682 }
 683
 684
 685 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
 686                                          struct wpa_ssid *ssid,
 687                                          struct wpa_ie_data *ie)
 688 {
 689         int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
 690         if (ret) {
 691                 if (ret == -2) {
 692                         wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
 693                                 "from association info");
 694                 }
 695                 return -1;
 696         }
 697
 698         wpa_printf(MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set cipher "
 699                    "suites");
 700         if (!(ie->group_cipher & ssid->group_cipher)) {
 701                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
 702                         "cipher 0x%x (mask 0x%x) - reject",
 703                         ie->group_cipher, ssid->group_cipher);
 704                 return -1;
 705         }
 706         if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
 707                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
 708                         "cipher 0x%x (mask 0x%x) - reject",
 709                         ie->pairwise_cipher, ssid->pairwise_cipher);
 710                 return -1;
 711         }
 712         if (!(ie->key_mgmt & ssid->key_mgmt)) {
 713                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
 714                         "management 0x%x (mask 0x%x) - reject",
 715                         ie->key_mgmt, ssid->key_mgmt);
 716                 return -1;
 717         }
 718
 719 #ifdef CONFIG_IEEE80211W
 720         if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
 721             ssid->ieee80211w == IEEE80211W_REQUIRED) {
 722                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
 723                         "that does not support management frame protection - "
 724                         "reject");
 725                 return -1;
 726         }
 727 #endif /* CONFIG_IEEE80211W */
 728
 729         return 0;
 730 }
 731
 732
 733 /**
 734  * wpa_supplicant_set_suites - Set authentication and encryption parameters
 735  * @wpa_s: Pointer to wpa_supplicant data
 736  * @bss: Scan results for the selected BSS, or %NULL if not available
 737  * @ssid: Configuration data for the selected network
 738  * @wpa_ie: Buffer for the WPA/RSN IE
 739  * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
 740  * used buffer length in case the functions returns success.
 741  * Returns: 0 on success or -1 on failure
 742  *
 743  * This function is used to configure authentication and encryption parameters
 744  * based on the network configuration and scan result for the selected BSS (if
 745  * available).
 746  */
 747 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 748                               struct wpa_scan_res *bss,
 749                               struct wpa_ssid *ssid,
 750                               u8 *wpa_ie, size_t *wpa_ie_len)
 751 {
 752         struct wpa_ie_data ie;
 753         int sel, proto;
 754         const u8 *bss_wpa, *bss_rsn;
 755
 756         if (bss) {
 757                 bss_wpa = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 758                 bss_rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 759         } else
 760                 bss_wpa = bss_rsn = NULL;
 761
 762         if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
 763             wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
 764             (ie.group_cipher & ssid->group_cipher) &&
 765             (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 766             (ie.key_mgmt & ssid->key_mgmt)) {
 767                 wpa_msg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
 768                 proto = WPA_PROTO_RSN;
 769         } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
 770                    wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
 771                    (ie.group_cipher & ssid->group_cipher) &&
 772                    (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 773                    (ie.key_mgmt & ssid->key_mgmt)) {
 774                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
 775                 proto = WPA_PROTO_WPA;
 776         } else if (bss) {
 777                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
 778                 return -1;
 779         } else {
 780                 if (ssid->proto & WPA_PROTO_RSN)
 781                         proto = WPA_PROTO_RSN;
 782                 else
 783                         proto = WPA_PROTO_WPA;
 784                 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
 785                         os_memset(&ie, 0, sizeof(ie));
 786                         ie.group_cipher = ssid->group_cipher;
 787                         ie.pairwise_cipher = ssid->pairwise_cipher;
 788                         ie.key_mgmt = ssid->key_mgmt;
 789 #ifdef CONFIG_IEEE80211W
 790                         ie.mgmt_group_cipher =
 791                                 ssid->ieee80211w != NO_IEEE80211W ?
 792                                 WPA_CIPHER_AES_128_CMAC : 0;
 793 #endif /* CONFIG_IEEE80211W */
 794                         wpa_printf(MSG_DEBUG, "WPA: Set cipher suites based "
 795                                    "on configuration");
 796                 } else
 797                         proto = ie.proto;
 798         }
 799
 800         wpa_printf(MSG_DEBUG, "WPA: Selected cipher suites: group %d "
 801                    "pairwise %d key_mgmt %d proto %d",
 802                    ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
 803 #ifdef CONFIG_IEEE80211W
 804         if (ssid->ieee80211w) {
 805                 wpa_printf(MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
 806                            ie.mgmt_group_cipher);
 807         }
 808 #endif /* CONFIG_IEEE80211W */
 809
 810         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
 811         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
 812                          !!(ssid->proto & WPA_PROTO_RSN));
 813
 814         if (bss || !wpa_s->ap_ies_from_associnfo) {
 815                 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
 816                                          bss_wpa ? 2 + bss_wpa[1] : 0) ||
 817                     wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
 818                                          bss_rsn ? 2 + bss_rsn[1] : 0))
 819                         return -1;
 820         }
 821
 822         sel = ie.group_cipher & ssid->group_cipher;
 823         if (sel & WPA_CIPHER_CCMP) {
 824                 wpa_s->group_cipher = WPA_CIPHER_CCMP;
 825                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
 826         } else if (sel & WPA_CIPHER_TKIP) {
 827                 wpa_s->group_cipher = WPA_CIPHER_TKIP;
 828                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
 829         } else if (sel & WPA_CIPHER_WEP104) {
 830                 wpa_s->group_cipher = WPA_CIPHER_WEP104;
 831                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
 832         } else if (sel & WPA_CIPHER_WEP40) {
 833                 wpa_s->group_cipher = WPA_CIPHER_WEP40;
 834                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
 835         } else {
 836                 wpa_printf(MSG_WARNING, "WPA: Failed to select group cipher.");
 837                 return -1;
 838         }
 839
 840         sel = ie.pairwise_cipher & ssid->pairwise_cipher;
 841         if (sel & WPA_CIPHER_CCMP) {
 842                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 843                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
 844         } else if (sel & WPA_CIPHER_TKIP) {
 845                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 846                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
 847         } else if (sel & WPA_CIPHER_NONE) {
 848                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 849                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
 850         } else {
 851                 wpa_printf(MSG_WARNING, "WPA: Failed to select pairwise "
 852                            "cipher.");
 853                 return -1;
 854         }
 855
 856         sel = ie.key_mgmt & ssid->key_mgmt;
 857         if (0) {
 858 #ifdef CONFIG_IEEE80211R
 859         } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
 860                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
 861                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
 862         } else if (sel & WPA_KEY_MGMT_FT_PSK) {
 863                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
 864                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
 865 #endif /* CONFIG_IEEE80211R */
 866 #ifdef CONFIG_IEEE80211W
 867         } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
 868                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
 869                 wpa_msg(wpa_s, MSG_DEBUG,
 870                         "WPA: using KEY_MGMT 802.1X with SHA256");
 871         } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
 872                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
 873                 wpa_msg(wpa_s, MSG_DEBUG,
 874                         "WPA: using KEY_MGMT PSK with SHA256");
 875 #endif /* CONFIG_IEEE80211W */
 876         } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
 877                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 878                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
 879         } else if (sel & WPA_KEY_MGMT_PSK) {
 880                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
 881                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
 882         } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
 883                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
 884                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
 885         } else {
 886                 wpa_printf(MSG_WARNING, "WPA: Failed to select authenticated "
 887                            "key management type.");
 888                 return -1;
 889         }
 890
 891         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 892         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 893                          wpa_s->pairwise_cipher);
 894         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 895
 896 #ifdef CONFIG_IEEE80211W
 897         sel = ie.mgmt_group_cipher;
 898         if (ssid->ieee80211w == NO_IEEE80211W ||
 899             !(ie.capabilities & WPA_CAPABILITY_MFPC))
 900                 sel = 0;
 901         if (sel & WPA_CIPHER_AES_128_CMAC) {
 902                 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
 903                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
 904                         "AES-128-CMAC");
 905         } else {
 906                 wpa_s->mgmt_group_cipher = 0;
 907                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
 908         }
 909         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 910                          wpa_s->mgmt_group_cipher);
 911 #endif /* CONFIG_IEEE80211W */
 912
 913         if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
 914                 wpa_printf(MSG_WARNING, "WPA: Failed to generate WPA IE.");
 915                 return -1;
 916         }
 917
 918         if (ssid->key_mgmt &
 919             (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
 920                 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
 921         else
 922                 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
 923
 924         return 0;
 925 }
 926
 927
 928 /**
 929  * wpa_supplicant_associate - Request association
 930  * @wpa_s: Pointer to wpa_supplicant data
 931  * @bss: Scan results for the selected BSS, or %NULL if not available
 932  * @ssid: Configuration data for the selected network
 933  *
 934  * This function is used to request %wpa_supplicant to associate with a BSS.
 935  */
 936 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
 937                               struct wpa_scan_res *bss, struct wpa_ssid *ssid)
 938 {
 939         u8 wpa_ie[80];
 940         size_t wpa_ie_len;
 941         int use_crypt, ret, i;
 942         int algs = AUTH_ALG_OPEN_SYSTEM;
 943         wpa_cipher cipher_pairwise, cipher_group;
 944         struct wpa_driver_associate_params params;
 945         int wep_keys_set = 0;
 946         struct wpa_driver_capa capa;
 947         int assoc_failed = 0;
 948
 949         if (ssid->mode == 2) {
 950 #ifdef CONFIG_AP
 951                 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
 952                         wpa_printf(MSG_INFO, "Driver does not support AP "
 953                                    "mode");
 954                         return;
 955                 }
 956                 wpa_supplicant_create_ap(wpa_s, ssid);
 957 #else /* CONFIG_AP */
 958                 wpa_printf(MSG_ERROR, "AP mode support not included in the "
 959                            "build");
 960 #endif /* CONFIG_AP */
 961                 return;
 962         }
 963
 964         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) {
 965                 sme_authenticate(wpa_s, bss, ssid);
 966                 return;
 967         }
 968
 969         wpa_s->reassociate = 0;
 970         if (bss) {
 971 #ifdef CONFIG_IEEE80211R
 972                 const u8 *md = NULL;
 973 #endif /* CONFIG_IEEE80211R */
 974                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 975                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 976                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
 977                         ie ? wpa_ssid_txt(ie + 2, ie[1]) : "", bss->freq);
 978                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
 979                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 980 #ifdef CONFIG_IEEE80211R
 981                 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 982                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 983                         md = ie + 2;
 984                 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
 985                 if (md) {
 986                         /* Prepare for the next transition */
 987                         wpa_ft_prepare_auth_request(wpa_s->wpa);
 988                 }
 989 #endif /* CONFIG_IEEE80211R */
 990 #ifdef CONFIG_WPS
 991         } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
 992                    wpa_s->conf->ap_scan == 2 &&
 993                    (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 994                 /* Use ap_scan==1 style network selection to find the network
 995                  */
 996                 wpa_s->scan_req = 2;
 997                 wpa_s->reassociate = 1;
 998                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 999                 return;
1000 #endif /* CONFIG_WPS */
1001         } else {
1002                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1003                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1004                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1005         }
1006         wpa_supplicant_cancel_scan(wpa_s);
1007
1008         /* Starting new association, so clear the possibly used WPA IE from the
1009          * previous association. */
1010         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1011
1012         if (wpa_drv_set_mode(wpa_s, ssid->mode)) {
1013                 wpa_printf(MSG_WARNING, "Failed to set operating mode");
1014                 assoc_failed = 1;
1015         }
1016
1017 #ifdef IEEE8021X_EAPOL
1018         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1019                 if (ssid->leap) {
1020                         if (ssid->non_leap == 0)
1021                                 algs = AUTH_ALG_LEAP;
1022                         else
1023                                 algs |= AUTH_ALG_LEAP;
1024                 }
1025         }
1026 #endif /* IEEE8021X_EAPOL */
1027         wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1028         if (ssid->auth_alg) {
1029                 algs = 0;
1030                 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
1031                         algs |= AUTH_ALG_OPEN_SYSTEM;
1032                 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
1033                         algs |= AUTH_ALG_SHARED_KEY;
1034                 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
1035                         algs |= AUTH_ALG_LEAP;
1036                 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
1037                            algs);
1038         }
1039         wpa_drv_set_auth_alg(wpa_s, algs);
1040
1041         if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1042                     wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
1043             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1044                                WPA_KEY_MGMT_FT_IEEE8021X |
1045                                WPA_KEY_MGMT_FT_PSK |
1046                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
1047                                WPA_KEY_MGMT_PSK_SHA256))) {
1048                 int try_opportunistic;
1049                 try_opportunistic = ssid->proactive_key_caching &&
1050                         (ssid->proto & WPA_PROTO_RSN);
1051                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1052                                             wpa_s->current_ssid,
1053                                             try_opportunistic) == 0)
1054                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1055                 wpa_ie_len = sizeof(wpa_ie);
1056                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1057                                               wpa_ie, &wpa_ie_len)) {
1058                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1059                                    "management and encryption suites");
1060                         return;
1061                 }
1062         } else if (ssid->key_mgmt &
1063                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1064                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1065                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1066                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1067                 wpa_ie_len = sizeof(wpa_ie);
1068                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1069                                               wpa_ie, &wpa_ie_len)) {
1070                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1071                                    "management and encryption suites (no scan "
1072                                    "results)");
1073                         return;
1074                 }
1075 #ifdef CONFIG_WPS
1076         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1077                 struct wpabuf *wps_ie;
1078                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1079                 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1080                         wpa_ie_len = wpabuf_len(wps_ie);
1081                         os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1082                 } else
1083                         wpa_ie_len = 0;
1084                 wpabuf_free(wps_ie);
1085                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1086 #endif /* CONFIG_WPS */
1087         } else {
1088                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1089                 wpa_ie_len = 0;
1090         }
1091
1092         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1093         use_crypt = 1;
1094         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1095         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1096         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1097             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1098                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1099                         use_crypt = 0;
1100                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1101                         use_crypt = 1;
1102                         wep_keys_set = 1;
1103                 }
1104         }
1105         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1106                 use_crypt = 0;
1107
1108 #ifdef IEEE8021X_EAPOL
1109         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1110                 if ((ssid->eapol_flags &
1111                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1112                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1113                     !wep_keys_set) {
1114                         use_crypt = 0;
1115                 } else {
1116                         /* Assume that dynamic WEP-104 keys will be used and
1117                          * set cipher suites in order for drivers to expect
1118                          * encryption. */
1119                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1120                 }
1121         }
1122 #endif /* IEEE8021X_EAPOL */
1123
1124         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1125                 /* Set the key before (and later after) association */
1126                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1127         }
1128
1129         wpa_drv_set_drop_unencrypted(wpa_s, use_crypt);
1130         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1131         os_memset(&params, 0, sizeof(params));
1132         if (bss) {
1133                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1134                 params.bssid = bss->bssid;
1135                 params.ssid = ie ? ie + 2 : (u8 *) "";
1136                 params.ssid_len = ie ? ie[1] : 0;
1137                 params.freq = bss->freq;
1138         } else {
1139                 params.ssid = ssid->ssid;
1140                 params.ssid_len = ssid->ssid_len;
1141         }
1142         if (ssid->mode == 1 && ssid->frequency > 0 && params.freq == 0)
1143                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1144         params.wpa_ie = wpa_ie;
1145         params.wpa_ie_len = wpa_ie_len;
1146         params.pairwise_suite = cipher_pairwise;
1147         params.group_suite = cipher_group;
1148         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1149         params.auth_alg = algs;
1150         params.mode = ssid->mode;
1151         for (i = 0; i < NUM_WEP_KEYS; i++) {
1152                 if (ssid->wep_key_len[i])
1153                         params.wep_key[i] = ssid->wep_key[i];
1154                 params.wep_key_len[i] = ssid->wep_key_len[i];
1155         }
1156         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1157
1158         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1159             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1160              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1161                 params.passphrase = ssid->passphrase;
1162                 if (ssid->psk_set)
1163                         params.psk = ssid->psk;
1164         }
1165
1166         params.drop_unencrypted = use_crypt;
1167
1168 #ifdef CONFIG_IEEE80211W
1169         switch (ssid->ieee80211w) {
1170         case NO_IEEE80211W:
1171                 params.mgmt_frame_protection = NO_MGMT_FRAME_PROTECTION;
1172                 break;
1173         case IEEE80211W_OPTIONAL:
1174                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_OPTIONAL;
1175                 break;
1176         case IEEE80211W_REQUIRED:
1177                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_REQUIRED;
1178                 break;
1179         }
1180         if (ssid->ieee80211w != NO_IEEE80211W && bss) {
1181                 const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
1182                 struct wpa_ie_data ie;
1183                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1184                     ie.capabilities &
1185                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1186                         wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
1187                                    "require MFP");
1188                         params.mgmt_frame_protection =
1189                                 MGMT_FRAME_PROTECTION_REQUIRED;
1190                 }
1191         }
1192 #endif /* CONFIG_IEEE80211W */
1193
1194         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1195                 ret = ieee80211_sta_associate(wpa_s, &params);
1196         else
1197                 ret = wpa_drv_associate(wpa_s, &params);
1198         if (ret < 0) {
1199                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1200                         "failed");
1201                 /* try to continue anyway; new association will be tried again
1202                  * after timeout */
1203                 assoc_failed = 1;
1204         }
1205
1206         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1207                 /* Set the key after the association just in case association
1208                  * cleared the previously configured key. */
1209                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1210                 /* No need to timeout authentication since there is no key
1211                  * management. */
1212                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1213                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1214 #ifdef CONFIG_IBSS_RSN
1215         } else if (ssid->mode == IEEE80211_MODE_IBSS &&
1216                    wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1217                    wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1218                 ibss_rsn_set_psk(wpa_s->ibss_rsn, ssid->psk);
1219                 /*
1220                  * RSN IBSS authentication is per-STA and we can disable the
1221                  * per-BSSID authentication.
1222                  */
1223                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1224                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1225 #endif /* CONFIG_IBSS_RSN */
1226         } else {
1227                 /* Timeout for IEEE 802.11 authentication and association */
1228                 int timeout = 60;
1229
1230                 if (assoc_failed) {
1231                         /* give IBSS a bit more time */
1232                         timeout = ssid->mode ? 10 : 5;
1233                 } else if (wpa_s->conf->ap_scan == 1) {
1234                         /* give IBSS a bit more time */
1235                         timeout = ssid->mode ? 20 : 10;
1236                 }
1237                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1238         }
1239
1240         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1241             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1242                 /* Set static WEP keys again */
1243                 wpa_set_wep_keys(wpa_s, ssid);
1244         }
1245
1246         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1247                 /*
1248                  * Do not allow EAP session resumption between different
1249                  * network configurations.
1250                  */
1251                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1252         }
1253         wpa_s->current_ssid = ssid;
1254         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1255         wpa_supplicant_initiate_eapol(wpa_s);
1256 }
1257
1258
1259 /**
1260  * wpa_supplicant_disassociate - Disassociate the current connection
1261  * @wpa_s: Pointer to wpa_supplicant data
1262  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1263  *
1264  * This function is used to request %wpa_supplicant to disassociate with the
1265  * current AP.
1266  */
1267 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1268                                  int reason_code)
1269 {
1270         u8 *addr = NULL;
1271         if (!is_zero_ether_addr(wpa_s->bssid)) {
1272                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1273                         ieee80211_sta_disassociate(wpa_s, reason_code);
1274                 else
1275                         wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1276                 addr = wpa_s->bssid;
1277         }
1278         wpa_clear_keys(wpa_s, addr);
1279         wpa_supplicant_mark_disassoc(wpa_s);
1280         wpa_s->current_ssid = NULL;
1281         wpa_sm_set_config(wpa_s->wpa, NULL);
1282         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1283 }
1284
1285
1286 /**
1287  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1288  * @wpa_s: Pointer to wpa_supplicant data
1289  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1290  *
1291  * This function is used to request %wpa_supplicant to deauthenticate from the
1292  * current AP.
1293  */
1294 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1295                                    int reason_code)
1296 {
1297         u8 *addr = NULL;
1298         if (!is_zero_ether_addr(wpa_s->bssid)) {
1299                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1300                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1301                 else
1302                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1303                                                reason_code);
1304                 addr = wpa_s->bssid;
1305         }
1306         wpa_clear_keys(wpa_s, addr);
1307         wpa_supplicant_mark_disassoc(wpa_s);
1308         wpa_s->current_ssid = NULL;
1309         wpa_sm_set_config(wpa_s->wpa, NULL);
1310         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1311 }
1312
1313
1314 static int wpa_supplicant_get_scan_results_old(struct wpa_supplicant *wpa_s)
1315 {
1316 #define SCAN_AP_LIMIT 128
1317         struct wpa_scan_result *results;
1318         int num, i;
1319         struct wpa_scan_results *res;
1320
1321         results = os_malloc(SCAN_AP_LIMIT * sizeof(struct wpa_scan_result));
1322         if (results == NULL) {
1323                 wpa_printf(MSG_WARNING, "Failed to allocate memory for scan "
1324                            "results");
1325                 return -1;
1326         }
1327
1328         num = wpa_drv_get_scan_results(wpa_s, results, SCAN_AP_LIMIT);
1329         wpa_printf(MSG_DEBUG, "Scan results: %d", num);
1330         if (num < 0) {
1331                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1332                 os_free(results);
1333                 return -1;
1334         }
1335         if (num > SCAN_AP_LIMIT) {
1336                 wpa_printf(MSG_INFO, "Not enough room for all APs (%d < %d)",
1337                            num, SCAN_AP_LIMIT);
1338                 num = SCAN_AP_LIMIT;
1339         }
1340
1341         wpa_scan_results_free(wpa_s->scan_res);
1342         wpa_s->scan_res = NULL;
1343
1344         /* Convert old scan result data structure to the new one */
1345         res = os_zalloc(sizeof(*res));
1346         if (res == NULL) {
1347                 os_free(results);
1348                 return -1;
1349         }
1350         res->res = os_zalloc(num * sizeof(struct wpa_scan_res *));
1351         if (res->res == NULL) {
1352                 os_free(results);
1353                 os_free(res);
1354                 return -1;
1355         }
1356
1357         for (i = 0; i < num; i++) {
1358                 struct wpa_scan_result *bss = &results[i];
1359                 struct wpa_scan_res *r;
1360                 size_t ie_len;
1361                 u8 *pos;
1362
1363                 ie_len = 2 + bss->ssid_len + bss->rsn_ie_len + bss->wpa_ie_len;
1364                 if (bss->maxrate)
1365                         ie_len += 3;
1366                 if (bss->mdie_present)
1367                         ie_len += 5;
1368
1369                 r = os_zalloc(sizeof(*r) + ie_len);
1370                 if (r == NULL)
1371                         break;
1372
1373                 os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
1374                 r->freq = bss->freq;
1375                 r->caps = bss->caps;
1376                 r->qual = bss->qual;
1377                 r->noise = bss->noise;
1378                 r->level = bss->level;
1379                 r->tsf = bss->tsf;
1380                 r->ie_len = ie_len;
1381
1382                 pos = (u8 *) (r + 1);
1383
1384                 /* SSID IE */
1385                 *pos++ = WLAN_EID_SSID;
1386                 *pos++ = bss->ssid_len;
1387                 os_memcpy(pos, bss->ssid, bss->ssid_len);
1388                 pos += bss->ssid_len;
1389
1390                 if (bss->maxrate) {
1391                         /* Fake Supported Rate IE to include max rate */
1392                         *pos++ = WLAN_EID_SUPP_RATES;
1393                         *pos++ = 1;
1394                         *pos++ = bss->maxrate;
1395                 }
1396
1397                 if (bss->rsn_ie_len) {
1398                         os_memcpy(pos, bss->rsn_ie, bss->rsn_ie_len);
1399                         pos += bss->rsn_ie_len;
1400                 }
1401
1402                 if (bss->mdie_present) {
1403                         os_memcpy(pos, bss->mdie, 5);
1404                         pos += 5;
1405                 }
1406
1407                 if (bss->wpa_ie_len) {
1408                         os_memcpy(pos, bss->wpa_ie, bss->wpa_ie_len);
1409                         pos += bss->wpa_ie_len;
1410                 }
1411
1412                 res->res[res->num++] = r;
1413         }
1414
1415         os_free(results);
1416         wpa_s->scan_res = res;
1417
1418         return 0;
1419 }
1420
1421
1422 /**
1423  * wpa_supplicant_get_scan_results - Get scan results
1424  * @wpa_s: Pointer to wpa_supplicant data
1425  * Returns: 0 on success, -1 on failure
1426  *
1427  * This function is request the current scan results from the driver and stores
1428  * a local copy of the results in wpa_s->scan_res.
1429  */
1430 int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s)
1431 {
1432         int ret;
1433
1434         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1435                 wpa_scan_results_free(wpa_s->scan_res);
1436                 wpa_s->scan_res = ieee80211_sta_get_scan_results(wpa_s);
1437                 if (wpa_s->scan_res == NULL) {
1438                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1439                         ret = -1;
1440                 } else
1441                         ret = 0;
1442         } else if (wpa_s->driver->get_scan_results2 == NULL)
1443                 ret = wpa_supplicant_get_scan_results_old(wpa_s);
1444         else {
1445                 wpa_scan_results_free(wpa_s->scan_res);
1446                 wpa_s->scan_res = wpa_drv_get_scan_results2(wpa_s);
1447                 if (wpa_s->scan_res == NULL) {
1448                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1449                         ret = -1;
1450                 } else
1451                         ret = 0;
1452         }
1453
1454         if (wpa_s->scan_res)
1455                 wpa_scan_sort_results(wpa_s->scan_res);
1456
1457         return ret;
1458 }
1459
1460
1461 /**
1462  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1463  * @wpa_s: Pointer to wpa_supplicant data
1464  * Returns: A pointer to the current network structure or %NULL on failure
1465  */
1466 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1467 {
1468         struct wpa_ssid *entry;
1469         u8 ssid[MAX_SSID_LEN];
1470         int res;
1471         size_t ssid_len;
1472         u8 bssid[ETH_ALEN];
1473         int wired;
1474
1475         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1476                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1477                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1478                                    "MLME.");
1479                         return NULL;
1480                 }
1481         } else {
1482                 res = wpa_drv_get_ssid(wpa_s, ssid);
1483                 if (res < 0) {
1484                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1485                                    "driver.");
1486                         return NULL;
1487                 }
1488                 ssid_len = res;
1489         }
1490
1491         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1492                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1493         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1494                 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1495                 return NULL;
1496         }
1497
1498         wired = wpa_s->conf->ap_scan == 0 &&
1499                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1500
1501         entry = wpa_s->conf->ssid;
1502         while (entry) {
1503                 if (!entry->disabled &&
1504                     ((ssid_len == entry->ssid_len &&
1505                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1506                     (!entry->bssid_set ||
1507                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1508                         return entry;
1509 #ifdef CONFIG_WPS
1510                 if (!entry->disabled &&
1511                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1512                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1513                     (!entry->bssid_set ||
1514                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1515                         return entry;
1516 #endif /* CONFIG_WPS */
1517                 entry = entry->next;
1518         }
1519
1520         return NULL;
1521 }
1522
1523
1524 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1525                                      const char *name)
1526 {
1527         int i;
1528         size_t len;
1529         const char *pos;
1530
1531         if (wpa_s == NULL)
1532                 return -1;
1533
1534         if (wpa_drivers[0] == NULL) {
1535                 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1536                            "wpa_supplicant.");
1537                 return -1;
1538         }
1539
1540         if (name == NULL) {
1541                 /* default to first driver in the list */
1542                 wpa_s->driver = wpa_drivers[0];
1543                 return 0;
1544         }
1545
1546         pos = os_strchr(name, ',');
1547         if (pos)
1548                 len = pos - name;
1549         else
1550                 len = os_strlen(name);
1551         for (i = 0; wpa_drivers[i]; i++) {
1552                 if (os_strlen(wpa_drivers[i]->name) == len &&
1553                     os_strncmp(name, wpa_drivers[i]->name, len) ==
1554                     0) {
1555                         wpa_s->driver = wpa_drivers[i];
1556                         return 0;
1557                 }
1558         }
1559
1560         wpa_printf(MSG_ERROR, "Unsupported driver '%s'.", name);
1561         return -1;
1562 }
1563
1564
1565 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1566                              const u8 *buf, size_t len)
1567 {
1568         struct wpa_supplicant *wpa_s = ctx;
1569
1570         wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1571         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1572
1573         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1574                 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1575                            "no key management is configured");
1576                 return;
1577         }
1578
1579         if (wpa_s->eapol_received == 0 &&
1580             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1581              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1582              wpa_s->wpa_state != WPA_COMPLETED)) {
1583                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1584                 wpa_supplicant_req_auth_timeout(
1585                         wpa_s,
1586                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1587                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1588                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1589                         70 : 10, 0);
1590         }
1591         wpa_s->eapol_received++;
1592
1593         if (wpa_s->countermeasures) {
1594                 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1595                            "packet");
1596                 return;
1597         }
1598
1599 #ifdef CONFIG_IBSS_RSN
1600         if (wpa_s->current_ssid &&
1601             wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS) {
1602                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1603                 return;
1604         }
1605 #endif /* CONFIG_IBSS_RSN */
1606
1607         /* Source address of the incoming EAPOL frame could be compared to the
1608          * current BSSID. However, it is possible that a centralized
1609          * Authenticator could be using another MAC address than the BSSID of
1610          * an AP, so just allow any address to be used for now. The replies are
1611          * still sent to the current BSSID (if available), though. */
1612
1613         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1614         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1615             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1616                 return;
1617         wpa_drv_poll(wpa_s);
1618         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1619                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1620         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1621                 /*
1622                  * Set portValid = TRUE here since we are going to skip 4-way
1623                  * handshake processing which would normally set portValid. We
1624                  * need this to allow the EAPOL state machines to be completed
1625                  * without going through EAPOL-Key handshake.
1626                  */
1627                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1628         }
1629 }
1630
1631
1632 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1633                            struct ieee80211_rx_status *rx_status)
1634 {
1635         struct wpa_supplicant *wpa_s = ctx;
1636         ieee80211_sta_rx(wpa_s, buf, len, rx_status);
1637 }
1638
1639
1640 /**
1641  * wpa_supplicant_driver_init - Initialize driver interface parameters
1642  * @wpa_s: Pointer to wpa_supplicant data
1643  * Returns: 0 on success, -1 on failure
1644  *
1645  * This function is called to initialize driver interface parameters.
1646  * wpa_drv_init() must have been called before this function to initialize the
1647  * driver interface.
1648  */
1649 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1650 {
1651         static int interface_count = 0;
1652
1653         if (wpa_s->driver->send_eapol) {
1654                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1655                 if (addr)
1656                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1657         } else {
1658                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1659                                            wpa_drv_get_mac_addr(wpa_s),
1660                                            ETH_P_EAPOL,
1661                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1662                 if (wpa_s->l2 == NULL)
1663                         return -1;
1664         }
1665
1666         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1667                 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1668                 return -1;
1669         }
1670
1671         wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1672                    MAC2STR(wpa_s->own_addr));
1673
1674         if (wpa_s->bridge_ifname[0]) {
1675                 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1676                            " '%s'", wpa_s->bridge_ifname);
1677                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1678                                               wpa_s->own_addr,
1679                                               ETH_P_EAPOL,
1680                                               wpa_supplicant_rx_eapol, wpa_s,
1681                                               0);
1682                 if (wpa_s->l2_br == NULL) {
1683                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1684                                    "connection for the bridge interface '%s'",
1685                                    wpa_s->bridge_ifname);
1686                         return -1;
1687                 }
1688         }
1689
1690         /* Backwards compatibility call to set_wpa() handler. This is called
1691          * only just after init and just before deinit, so these handler can be
1692          * used to implement same functionality. */
1693         if (wpa_drv_set_wpa(wpa_s, 1) < 0) {
1694                 struct wpa_driver_capa capa;
1695                 if (wpa_drv_get_capa(wpa_s, &capa) < 0 ||
1696                     !(capa.flags & (WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1697                                     WPA_DRIVER_CAPA_KEY_MGMT_WPA2))) {
1698                         wpa_printf(MSG_DEBUG, "Driver does not support WPA.");
1699                         /* Continue to allow non-WPA modes to be used. */
1700                 } else {
1701                         wpa_printf(MSG_ERROR, "Failed to enable WPA in the "
1702                                 "driver.");
1703                         return -1;
1704                 }
1705         }
1706
1707         wpa_clear_keys(wpa_s, NULL);
1708
1709         /* Make sure that TKIP countermeasures are not left enabled (could
1710          * happen if wpa_supplicant is killed during countermeasures. */
1711         wpa_drv_set_countermeasures(wpa_s, 0);
1712
1713         wpa_drv_set_drop_unencrypted(wpa_s, 1);
1714
1715         wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1716         wpa_drv_flush_pmkid(wpa_s);
1717
1718         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1719         wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1720         interface_count++;
1721
1722         return 0;
1723 }
1724
1725
1726 static int wpa_supplicant_daemon(const char *pid_file)
1727 {
1728         wpa_printf(MSG_DEBUG, "Daemonize..");
1729         return os_daemonize(pid_file);
1730 }
1731
1732
1733 static struct wpa_supplicant * wpa_supplicant_alloc(void)
1734 {
1735         struct wpa_supplicant *wpa_s;
1736
1737         wpa_s = os_zalloc(sizeof(*wpa_s));
1738         if (wpa_s == NULL)
1739                 return NULL;
1740         wpa_s->scan_req = 1;
1741
1742         return wpa_s;
1743 }
1744
1745
1746 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
1747                                      struct wpa_interface *iface)
1748 {
1749         const char *ifname, *driver;
1750         struct wpa_driver_capa capa;
1751
1752         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
1753                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
1754                    iface->confname ? iface->confname : "N/A",
1755                    iface->driver ? iface->driver : "default",
1756                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
1757                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
1758
1759         if (iface->confname) {
1760 #ifdef CONFIG_BACKEND_FILE
1761                 wpa_s->confname = os_rel2abs_path(iface->confname);
1762                 if (wpa_s->confname == NULL) {
1763                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
1764                                    "for configuration file '%s'.",
1765                                    iface->confname);
1766                         return -1;
1767                 }
1768                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
1769                            iface->confname, wpa_s->confname);
1770 #else /* CONFIG_BACKEND_FILE */
1771                 wpa_s->confname = os_strdup(iface->confname);
1772 #endif /* CONFIG_BACKEND_FILE */
1773                 wpa_s->conf = wpa_config_read(wpa_s->confname);
1774                 if (wpa_s->conf == NULL) {
1775                         wpa_printf(MSG_ERROR, "Failed to read or parse "
1776                                    "configuration '%s'.", wpa_s->confname);
1777                         return -1;
1778                 }
1779
1780                 /*
1781                  * Override ctrl_interface and driver_param if set on command
1782                  * line.
1783                  */
1784                 if (iface->ctrl_interface) {
1785                         os_free(wpa_s->conf->ctrl_interface);
1786                         wpa_s->conf->ctrl_interface =
1787                                 os_strdup(iface->ctrl_interface);
1788                 }
1789
1790                 if (iface->driver_param) {
1791                         os_free(wpa_s->conf->driver_param);
1792                         wpa_s->conf->driver_param =
1793                                 os_strdup(iface->driver_param);
1794                 }
1795         } else
1796                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
1797                                                      iface->driver_param);
1798
1799         if (wpa_s->conf == NULL) {
1800                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
1801                 return -1;
1802         }
1803
1804         if (iface->ifname == NULL) {
1805                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
1806                 return -1;
1807         }
1808         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
1809                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
1810                            iface->ifname);
1811                 return -1;
1812         }
1813         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
1814
1815         if (iface->bridge_ifname) {
1816                 if (os_strlen(iface->bridge_ifname) >=
1817                     sizeof(wpa_s->bridge_ifname)) {
1818                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
1819                                    "name '%s'.", iface->bridge_ifname);
1820                         return -1;
1821                 }
1822                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
1823                            sizeof(wpa_s->bridge_ifname));
1824         }
1825
1826         /* RSNA Supplicant Key Management - INITIALIZE */
1827         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1828         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1829
1830         /* Initialize driver interface and register driver event handler before
1831          * L2 receive handler so that association events are processed before
1832          * EAPOL-Key packets if both become available for the same select()
1833          * call. */
1834         driver = iface->driver;
1835 next_driver:
1836         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
1837                 return -1;
1838
1839         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
1840         if (wpa_s->drv_priv == NULL) {
1841                 const char *pos;
1842                 pos = os_strchr(driver, ',');
1843                 if (pos) {
1844                         wpa_printf(MSG_DEBUG, "Failed to initialize driver "
1845                                    "interface - try next driver wrapper");
1846                         driver = pos + 1;
1847                         goto next_driver;
1848                 }
1849                 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
1850                 return -1;
1851         }
1852         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
1853                 wpa_printf(MSG_ERROR, "Driver interface rejected "
1854                            "driver_param '%s'", wpa_s->conf->driver_param);
1855                 return -1;
1856         }
1857
1858         ifname = wpa_drv_get_ifname(wpa_s);
1859         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
1860                 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
1861                            "name with '%s'", ifname);
1862                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
1863         }
1864
1865         if (wpa_supplicant_init_wpa(wpa_s) < 0)
1866                 return -1;
1867
1868         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
1869                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
1870                           NULL);
1871         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
1872
1873         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
1874             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
1875                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
1876                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1877                            "dot11RSNAConfigPMKLifetime");
1878                 return -1;
1879         }
1880
1881         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
1882             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
1883                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
1884                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1885                         "dot11RSNAConfigPMKReauthThreshold");
1886                 return -1;
1887         }
1888
1889         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
1890             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
1891                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
1892                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1893                            "dot11RSNAConfigSATimeout");
1894                 return -1;
1895         }
1896
1897         if (wpa_supplicant_driver_init(wpa_s) < 0)
1898                 return -1;
1899
1900         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
1901             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
1902                 wpa_printf(MSG_DEBUG, "Failed to set country");
1903                 return -1;
1904         }
1905
1906         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
1907
1908         if (wpas_wps_init(wpa_s))
1909                 return -1;
1910
1911         if (wpa_supplicant_init_eapol(wpa_s) < 0)
1912                 return -1;
1913         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
1914
1915         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
1916         if (wpa_s->ctrl_iface == NULL) {
1917                 wpa_printf(MSG_ERROR,
1918                            "Failed to initialize control interface '%s'.\n"
1919                            "You may have another wpa_supplicant process "
1920                            "already running or the file was\n"
1921                            "left by an unclean termination of wpa_supplicant "
1922                            "in which case you will need\n"
1923                            "to manually remove this file before starting "
1924                            "wpa_supplicant again.\n",
1925                            wpa_s->conf->ctrl_interface);
1926                 return -1;
1927         }
1928
1929         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
1930                 wpa_s->drv_flags = capa.flags;
1931                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1932                         if (ieee80211_sta_init(wpa_s))
1933                                 return -1;
1934                 }
1935                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
1936         }
1937
1938 #ifdef CONFIG_IBSS_RSN
1939         wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
1940         if (!wpa_s->ibss_rsn) {
1941                 wpa_printf(MSG_DEBUG, "Failed to init IBSS RSN");
1942                 return -1;
1943         }
1944 #endif /* CONFIG_IBSS_RSN */
1945
1946         return 0;
1947 }
1948
1949
1950 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s)
1951 {
1952         if (wpa_s->drv_priv) {
1953                 wpa_supplicant_deauthenticate(wpa_s,
1954                                               WLAN_REASON_DEAUTH_LEAVING);
1955
1956                 /* Backwards compatibility call to set_wpa() handler. This is
1957                  * called only just after init and just before deinit, so these
1958                  * handler can be used to implement same functionality. */
1959                 if (wpa_drv_set_wpa(wpa_s, 0) < 0) {
1960                         wpa_printf(MSG_ERROR, "Failed to disable WPA in the "
1961                                    "driver.");
1962                 }
1963
1964                 wpa_drv_set_drop_unencrypted(wpa_s, 0);
1965                 wpa_drv_set_countermeasures(wpa_s, 0);
1966                 wpa_clear_keys(wpa_s, NULL);
1967         }
1968
1969         wpas_dbus_unregister_iface(wpa_s);
1970
1971         wpa_supplicant_cleanup(wpa_s);
1972
1973         if (wpa_s->drv_priv)
1974                 wpa_drv_deinit(wpa_s);
1975 }
1976
1977
1978 /**
1979  * wpa_supplicant_add_iface - Add a new network interface
1980  * @global: Pointer to global data from wpa_supplicant_init()
1981  * @iface: Interface configuration options
1982  * Returns: Pointer to the created interface or %NULL on failure
1983  *
1984  * This function is used to add new network interfaces for %wpa_supplicant.
1985  * This can be called before wpa_supplicant_run() to add interfaces before the
1986  * main event loop has been started. In addition, new interfaces can be added
1987  * dynamically while %wpa_supplicant is already running. This could happen,
1988  * e.g., when a hotplug network adapter is inserted.
1989  */
1990 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
1991                                                  struct wpa_interface *iface)
1992 {
1993         struct wpa_supplicant *wpa_s;
1994
1995         if (global == NULL || iface == NULL)
1996                 return NULL;
1997
1998         wpa_s = wpa_supplicant_alloc();
1999         if (wpa_s == NULL)
2000                 return NULL;
2001
2002         if (wpa_supplicant_init_iface(wpa_s, iface)) {
2003                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2004                            iface->ifname);
2005                 wpa_supplicant_deinit_iface(wpa_s);
2006                 os_free(wpa_s);
2007                 return NULL;
2008         }
2009
2010         wpa_s->global = global;
2011
2012         /* Register the interface with the dbus control interface */
2013         if (wpas_dbus_register_iface(wpa_s)) {
2014                 wpa_supplicant_deinit_iface(wpa_s);
2015                 os_free(wpa_s);
2016                 return NULL;
2017         }
2018
2019         wpa_s->next = global->ifaces;
2020         global->ifaces = wpa_s;
2021
2022         wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2023
2024         return wpa_s;
2025 }
2026
2027
2028 /**
2029  * wpa_supplicant_remove_iface - Remove a network interface
2030  * @global: Pointer to global data from wpa_supplicant_init()
2031  * @wpa_s: Pointer to the network interface to be removed
2032  * Returns: 0 if interface was removed, -1 if interface was not found
2033  *
2034  * This function can be used to dynamically remove network interfaces from
2035  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2036  * addition, this function is used to remove all remaining interfaces when
2037  * %wpa_supplicant is terminated.
2038  */
2039 int wpa_supplicant_remove_iface(struct wpa_global *global,
2040                                 struct wpa_supplicant *wpa_s)
2041 {
2042         struct wpa_supplicant *prev;
2043
2044         /* Remove interface from the global list of interfaces */
2045         prev = global->ifaces;
2046         if (prev == wpa_s) {
2047                 global->ifaces = wpa_s->next;
2048         } else {
2049                 while (prev && prev->next != wpa_s)
2050                         prev = prev->next;
2051                 if (prev == NULL)
2052                         return -1;
2053                 prev->next = wpa_s->next;
2054         }
2055
2056         wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2057
2058         wpa_supplicant_deinit_iface(wpa_s);
2059         os_free(wpa_s);
2060
2061         return 0;
2062 }
2063
2064
2065 /**
2066  * wpa_supplicant_get_iface - Get a new network interface
2067  * @global: Pointer to global data from wpa_supplicant_init()
2068  * @ifname: Interface name
2069  * Returns: Pointer to the interface or %NULL if not found
2070  */
2071 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2072                                                  const char *ifname)
2073 {
2074         struct wpa_supplicant *wpa_s;
2075
2076         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2077                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2078                         return wpa_s;
2079         }
2080         return NULL;
2081 }
2082
2083
2084 /**
2085  * wpa_supplicant_init - Initialize %wpa_supplicant
2086  * @params: Parameters for %wpa_supplicant
2087  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2088  *
2089  * This function is used to initialize %wpa_supplicant. After successful
2090  * initialization, the returned data pointer can be used to add and remove
2091  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2092  */
2093 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2094 {
2095         struct wpa_global *global;
2096         int ret, i;
2097
2098         if (params == NULL)
2099                 return NULL;
2100
2101         wpa_debug_open_file(params->wpa_debug_file_path);
2102         if (params->wpa_debug_syslog)
2103                 wpa_debug_open_syslog();
2104
2105         ret = eap_peer_register_methods();
2106         if (ret) {
2107                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2108                 if (ret == -2)
2109                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2110                                    "the same EAP type.");
2111                 return NULL;
2112         }
2113
2114         global = os_zalloc(sizeof(*global));
2115         if (global == NULL)
2116                 return NULL;
2117         global->params.daemonize = params->daemonize;
2118         global->params.wait_for_monitor = params->wait_for_monitor;
2119         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2120         if (params->pid_file)
2121                 global->params.pid_file = os_strdup(params->pid_file);
2122         if (params->ctrl_interface)
2123                 global->params.ctrl_interface =
2124                         os_strdup(params->ctrl_interface);
2125         wpa_debug_level = global->params.wpa_debug_level =
2126                 params->wpa_debug_level;
2127         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2128                 params->wpa_debug_show_keys;
2129         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2130                 params->wpa_debug_timestamp;
2131
2132         if (eloop_init(global)) {
2133                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2134                 wpa_supplicant_deinit(global);
2135                 return NULL;
2136         }
2137
2138         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2139         if (global->ctrl_iface == NULL) {
2140                 wpa_supplicant_deinit(global);
2141                 return NULL;
2142         }
2143
2144         if (global->params.dbus_ctrl_interface) {
2145                 global->dbus_ctrl_iface =
2146                         wpa_supplicant_dbus_ctrl_iface_init(global);
2147                 if (global->dbus_ctrl_iface == NULL) {
2148                         wpa_supplicant_deinit(global);
2149                         return NULL;
2150                 }
2151         }
2152
2153         for (i = 0; wpa_drivers[i]; i++)
2154                 global->drv_count++;
2155         if (global->drv_count == 0) {
2156                 wpa_printf(MSG_ERROR, "No drivers enabled");
2157                 wpa_supplicant_deinit(global);
2158                 return NULL;
2159         }
2160         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2161         if (global->drv_priv == NULL) {
2162                 wpa_supplicant_deinit(global);
2163                 return NULL;
2164         }
2165         for (i = 0; wpa_drivers[i]; i++) {
2166                 if (!wpa_drivers[i]->global_init)
2167                         continue;
2168                 global->drv_priv[i] = wpa_drivers[i]->global_init();
2169                 if (global->drv_priv[i] == NULL) {
2170                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
2171                                    "'%s'", wpa_drivers[i]->name);
2172                         wpa_supplicant_deinit(global);
2173                         return NULL;
2174                 }
2175         }
2176
2177         return global;
2178 }
2179
2180
2181 /**
2182  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2183  * @global: Pointer to global data from wpa_supplicant_init()
2184  * Returns: 0 after successful event loop run, -1 on failure
2185  *
2186  * This function starts the main event loop and continues running as long as
2187  * there are any remaining events. In most cases, this function is running as
2188  * long as the %wpa_supplicant process in still in use.
2189  */
2190 int wpa_supplicant_run(struct wpa_global *global)
2191 {
2192         struct wpa_supplicant *wpa_s;
2193
2194         if (global->params.daemonize &&
2195             wpa_supplicant_daemon(global->params.pid_file))
2196                 return -1;
2197
2198         if (global->params.wait_for_monitor) {
2199                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2200                         if (wpa_s->ctrl_iface)
2201                                 wpa_supplicant_ctrl_iface_wait(
2202                                         wpa_s->ctrl_iface);
2203         }
2204
2205         eloop_register_signal_terminate(wpa_supplicant_terminate, NULL);
2206         eloop_register_signal_reconfig(wpa_supplicant_reconfig, NULL);
2207
2208         eloop_run();
2209
2210         return 0;
2211 }
2212
2213
2214 /**
2215  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2216  * @global: Pointer to global data from wpa_supplicant_init()
2217  *
2218  * This function is called to deinitialize %wpa_supplicant and to free all
2219  * allocated resources. Remaining network interfaces will also be removed.
2220  */
2221 void wpa_supplicant_deinit(struct wpa_global *global)
2222 {
2223         int i;
2224
2225         if (global == NULL)
2226                 return;
2227
2228         while (global->ifaces)
2229                 wpa_supplicant_remove_iface(global, global->ifaces);
2230
2231         if (global->ctrl_iface)
2232                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2233         if (global->dbus_ctrl_iface)
2234                 wpa_supplicant_dbus_ctrl_iface_deinit(global->dbus_ctrl_iface);
2235
2236         eap_peer_unregister_methods();
2237
2238         for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2239                 if (!global->drv_priv[i])
2240                         continue;
2241                 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2242         }
2243         os_free(global->drv_priv);
2244
2245         eloop_destroy();
2246
2247         if (global->params.pid_file) {
2248                 os_daemonize_terminate(global->params.pid_file);
2249                 os_free(global->params.pid_file);
2250         }
2251         os_free(global->params.ctrl_interface);
2252
2253         os_free(global);
2254         wpa_debug_close_syslog();
2255         wpa_debug_close_file();
2256 }