git.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_supplicant_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         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1299         if (!is_zero_ether_addr(wpa_s->bssid)) {
1300                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1301                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1302                 else
1303                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1304                                                reason_code);
1305                 addr = wpa_s->bssid;
1306         }
1307         wpa_clear_keys(wpa_s, addr);
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         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1312         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1313 }
1314
1315
1316 static int wpa_supplicant_get_scan_results_old(struct wpa_supplicant *wpa_s)
1317 {
1318 #define SCAN_AP_LIMIT 128
1319         struct wpa_scan_result *results;
1320         int num, i;
1321         struct wpa_scan_results *res;
1322
1323         results = os_malloc(SCAN_AP_LIMIT * sizeof(struct wpa_scan_result));
1324         if (results == NULL) {
1325                 wpa_printf(MSG_WARNING, "Failed to allocate memory for scan "
1326                            "results");
1327                 return -1;
1328         }
1329
1330         num = wpa_drv_get_scan_results(wpa_s, results, SCAN_AP_LIMIT);
1331         wpa_printf(MSG_DEBUG, "Scan results: %d", num);
1332         if (num < 0) {
1333                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1334                 os_free(results);
1335                 return -1;
1336         }
1337         if (num > SCAN_AP_LIMIT) {
1338                 wpa_printf(MSG_INFO, "Not enough room for all APs (%d < %d)",
1339                            num, SCAN_AP_LIMIT);
1340                 num = SCAN_AP_LIMIT;
1341         }
1342
1343         wpa_scan_results_free(wpa_s->scan_res);
1344         wpa_s->scan_res = NULL;
1345
1346         /* Convert old scan result data structure to the new one */
1347         res = os_zalloc(sizeof(*res));
1348         if (res == NULL) {
1349                 os_free(results);
1350                 return -1;
1351         }
1352         res->res = os_zalloc(num * sizeof(struct wpa_scan_res *));
1353         if (res->res == NULL) {
1354                 os_free(results);
1355                 os_free(res);
1356                 return -1;
1357         }
1358
1359         for (i = 0; i < num; i++) {
1360                 struct wpa_scan_result *bss = &results[i];
1361                 struct wpa_scan_res *r;
1362                 size_t ie_len;
1363                 u8 *pos;
1364
1365                 ie_len = 2 + bss->ssid_len + bss->rsn_ie_len + bss->wpa_ie_len;
1366                 if (bss->maxrate)
1367                         ie_len += 3;
1368                 if (bss->mdie_present)
1369                         ie_len += 5;
1370
1371                 r = os_zalloc(sizeof(*r) + ie_len);
1372                 if (r == NULL)
1373                         break;
1374
1375                 os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
1376                 r->freq = bss->freq;
1377                 r->caps = bss->caps;
1378                 r->qual = bss->qual;
1379                 r->noise = bss->noise;
1380                 r->level = bss->level;
1381                 r->tsf = bss->tsf;
1382                 r->ie_len = ie_len;
1383
1384                 pos = (u8 *) (r + 1);
1385
1386                 /* SSID IE */
1387                 *pos++ = WLAN_EID_SSID;
1388                 *pos++ = bss->ssid_len;
1389                 os_memcpy(pos, bss->ssid, bss->ssid_len);
1390                 pos += bss->ssid_len;
1391
1392                 if (bss->maxrate) {
1393                         /* Fake Supported Rate IE to include max rate */
1394                         *pos++ = WLAN_EID_SUPP_RATES;
1395                         *pos++ = 1;
1396                         *pos++ = bss->maxrate;
1397                 }
1398
1399                 if (bss->rsn_ie_len) {
1400                         os_memcpy(pos, bss->rsn_ie, bss->rsn_ie_len);
1401                         pos += bss->rsn_ie_len;
1402                 }
1403
1404                 if (bss->mdie_present) {
1405                         os_memcpy(pos, bss->mdie, 5);
1406                         pos += 5;
1407                 }
1408
1409                 if (bss->wpa_ie_len) {
1410                         os_memcpy(pos, bss->wpa_ie, bss->wpa_ie_len);
1411                         pos += bss->wpa_ie_len;
1412                 }
1413
1414                 res->res[res->num++] = r;
1415         }
1416
1417         os_free(results);
1418         wpa_s->scan_res = res;
1419
1420         return 0;
1421 }
1422
1423
1424 /**
1425  * wpa_supplicant_get_scan_results - Get scan results
1426  * @wpa_s: Pointer to wpa_supplicant data
1427  * Returns: 0 on success, -1 on failure
1428  *
1429  * This function is request the current scan results from the driver and stores
1430  * a local copy of the results in wpa_s->scan_res.
1431  */
1432 int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s)
1433 {
1434         int ret;
1435
1436         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1437                 wpa_scan_results_free(wpa_s->scan_res);
1438                 wpa_s->scan_res = ieee80211_sta_get_scan_results(wpa_s);
1439                 if (wpa_s->scan_res == NULL) {
1440                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1441                         ret = -1;
1442                 } else
1443                         ret = 0;
1444         } else if (wpa_s->driver->get_scan_results2 == NULL)
1445                 ret = wpa_supplicant_get_scan_results_old(wpa_s);
1446         else {
1447                 wpa_scan_results_free(wpa_s->scan_res);
1448                 wpa_s->scan_res = wpa_drv_get_scan_results2(wpa_s);
1449                 if (wpa_s->scan_res == NULL) {
1450                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1451                         ret = -1;
1452                 } else
1453                         ret = 0;
1454         }
1455
1456         if (wpa_s->scan_res)
1457                 wpa_scan_sort_results(wpa_s->scan_res);
1458
1459         return ret;
1460 }
1461
1462
1463 /**
1464  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1465  * @wpa_s: Pointer to wpa_supplicant data
1466  * Returns: A pointer to the current network structure or %NULL on failure
1467  */
1468 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1469 {
1470         struct wpa_ssid *entry;
1471         u8 ssid[MAX_SSID_LEN];
1472         int res;
1473         size_t ssid_len;
1474         u8 bssid[ETH_ALEN];
1475         int wired;
1476
1477         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1478                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1479                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1480                                    "MLME.");
1481                         return NULL;
1482                 }
1483         } else {
1484                 res = wpa_drv_get_ssid(wpa_s, ssid);
1485                 if (res < 0) {
1486                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1487                                    "driver.");
1488                         return NULL;
1489                 }
1490                 ssid_len = res;
1491         }
1492
1493         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1494                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1495         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1496                 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1497                 return NULL;
1498         }
1499
1500         wired = wpa_s->conf->ap_scan == 0 &&
1501                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1502
1503         entry = wpa_s->conf->ssid;
1504         while (entry) {
1505                 if (!entry->disabled &&
1506                     ((ssid_len == entry->ssid_len &&
1507                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1508                     (!entry->bssid_set ||
1509                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1510                         return entry;
1511 #ifdef CONFIG_WPS
1512                 if (!entry->disabled &&
1513                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1514                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1515                     (!entry->bssid_set ||
1516                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1517                         return entry;
1518 #endif /* CONFIG_WPS */
1519                 entry = entry->next;
1520         }
1521
1522         return NULL;
1523 }
1524
1525
1526 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1527                                      const char *name)
1528 {
1529         int i;
1530         size_t len;
1531         const char *pos;
1532
1533         if (wpa_s == NULL)
1534                 return -1;
1535
1536         if (wpa_supplicant_drivers[0] == NULL) {
1537                 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1538                            "wpa_supplicant.");
1539                 return -1;
1540         }
1541
1542         if (name == NULL) {
1543                 /* default to first driver in the list */
1544                 wpa_s->driver = wpa_supplicant_drivers[0];
1545                 return 0;
1546         }
1547
1548         pos = os_strchr(name, ',');
1549         if (pos)
1550                 len = pos - name;
1551         else
1552                 len = os_strlen(name);
1553         for (i = 0; wpa_supplicant_drivers[i]; i++) {
1554                 if (os_strlen(wpa_supplicant_drivers[i]->name) == len &&
1555                     os_strncmp(name, wpa_supplicant_drivers[i]->name, len) ==
1556                     0) {
1557                         wpa_s->driver = wpa_supplicant_drivers[i];
1558                         return 0;
1559                 }
1560         }
1561
1562         wpa_printf(MSG_ERROR, "Unsupported driver '%s'.", name);
1563         return -1;
1564 }
1565
1566
1567 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1568                              const u8 *buf, size_t len)
1569 {
1570         struct wpa_supplicant *wpa_s = ctx;
1571
1572         wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1573         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1574
1575         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1576                 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1577                            "no key management is configured");
1578                 return;
1579         }
1580
1581         if (wpa_s->eapol_received == 0 &&
1582             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1583              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1584              wpa_s->wpa_state != WPA_COMPLETED)) {
1585                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1586                 wpa_supplicant_req_auth_timeout(
1587                         wpa_s,
1588                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1589                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1590                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1591                         70 : 10, 0);
1592         }
1593         wpa_s->eapol_received++;
1594
1595         if (wpa_s->countermeasures) {
1596                 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1597                            "packet");
1598                 return;
1599         }
1600
1601 #ifdef CONFIG_IBSS_RSN
1602         if (wpa_s->current_ssid &&
1603             wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS) {
1604                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1605                 return;
1606         }
1607 #endif /* CONFIG_IBSS_RSN */
1608
1609         /* Source address of the incoming EAPOL frame could be compared to the
1610          * current BSSID. However, it is possible that a centralized
1611          * Authenticator could be using another MAC address than the BSSID of
1612          * an AP, so just allow any address to be used for now. The replies are
1613          * still sent to the current BSSID (if available), though. */
1614
1615         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1616         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1617             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1618                 return;
1619         wpa_drv_poll(wpa_s);
1620         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1621                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1622         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1623                 /*
1624                  * Set portValid = TRUE here since we are going to skip 4-way
1625                  * handshake processing which would normally set portValid. We
1626                  * need this to allow the EAPOL state machines to be completed
1627                  * without going through EAPOL-Key handshake.
1628                  */
1629                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1630         }
1631 }
1632
1633
1634 void wpa_supplicant_sta_free_hw_features(struct hostapd_hw_modes *hw_features,
1635                                          size_t num_hw_features)
1636 {
1637         ieee80211_sta_free_hw_features(hw_features, num_hw_features);
1638 }
1639
1640
1641 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1642                            struct ieee80211_rx_status *rx_status)
1643 {
1644         struct wpa_supplicant *wpa_s = ctx;
1645         ieee80211_sta_rx(wpa_s, buf, len, rx_status);
1646 }
1647
1648
1649 /**
1650  * wpa_supplicant_driver_init - Initialize driver interface parameters
1651  * @wpa_s: Pointer to wpa_supplicant data
1652  * Returns: 0 on success, -1 on failure
1653  *
1654  * This function is called to initialize driver interface parameters.
1655  * wpa_drv_init() must have been called before this function to initialize the
1656  * driver interface.
1657  */
1658 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1659 {
1660         static int interface_count = 0;
1661
1662         if (wpa_s->driver->send_eapol) {
1663                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1664                 if (addr)
1665                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1666         } else {
1667                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1668                                            wpa_drv_get_mac_addr(wpa_s),
1669                                            ETH_P_EAPOL,
1670                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1671                 if (wpa_s->l2 == NULL)
1672                         return -1;
1673         }
1674
1675         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1676                 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1677                 return -1;
1678         }
1679
1680         wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1681                    MAC2STR(wpa_s->own_addr));
1682
1683         if (wpa_s->bridge_ifname[0]) {
1684                 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1685                            " '%s'", wpa_s->bridge_ifname);
1686                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1687                                               wpa_s->own_addr,
1688                                               ETH_P_EAPOL,
1689                                               wpa_supplicant_rx_eapol, wpa_s,
1690                                               0);
1691                 if (wpa_s->l2_br == NULL) {
1692                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1693                                    "connection for the bridge interface '%s'",
1694                                    wpa_s->bridge_ifname);
1695                         return -1;
1696                 }
1697         }
1698
1699         /* Backwards compatibility call to set_wpa() handler. This is called
1700          * only just after init and just before deinit, so these handler can be
1701          * used to implement same functionality. */
1702         if (wpa_drv_set_wpa(wpa_s, 1) < 0) {
1703                 struct wpa_driver_capa capa;
1704                 if (wpa_drv_get_capa(wpa_s, &capa) < 0 ||
1705                     !(capa.flags & (WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1706                                     WPA_DRIVER_CAPA_KEY_MGMT_WPA2))) {
1707                         wpa_printf(MSG_DEBUG, "Driver does not support WPA.");
1708                         /* Continue to allow non-WPA modes to be used. */
1709                 } else {
1710                         wpa_printf(MSG_ERROR, "Failed to enable WPA in the "
1711                                 "driver.");
1712                         return -1;
1713                 }
1714         }
1715
1716         wpa_clear_keys(wpa_s, NULL);
1717
1718         /* Make sure that TKIP countermeasures are not left enabled (could
1719          * happen if wpa_supplicant is killed during countermeasures. */
1720         wpa_drv_set_countermeasures(wpa_s, 0);
1721
1722         wpa_drv_set_drop_unencrypted(wpa_s, 1);
1723
1724         wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1725         wpa_drv_flush_pmkid(wpa_s);
1726
1727         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1728         wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1729         interface_count++;
1730
1731         return 0;
1732 }
1733
1734
1735 static int wpa_supplicant_daemon(const char *pid_file)
1736 {
1737         wpa_printf(MSG_DEBUG, "Daemonize..");
1738         return os_daemonize(pid_file);
1739 }
1740
1741
1742 static struct wpa_supplicant * wpa_supplicant_alloc(void)
1743 {
1744         struct wpa_supplicant *wpa_s;
1745
1746         wpa_s = os_zalloc(sizeof(*wpa_s));
1747         if (wpa_s == NULL)
1748                 return NULL;
1749         wpa_s->scan_req = 1;
1750
1751         return wpa_s;
1752 }
1753
1754
1755 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
1756                                      struct wpa_interface *iface)
1757 {
1758         const char *ifname, *driver;
1759         struct wpa_driver_capa capa;
1760
1761         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
1762                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
1763                    iface->confname ? iface->confname : "N/A",
1764                    iface->driver ? iface->driver : "default",
1765                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
1766                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
1767
1768         if (iface->confname) {
1769 #ifdef CONFIG_BACKEND_FILE
1770                 wpa_s->confname = os_rel2abs_path(iface->confname);
1771                 if (wpa_s->confname == NULL) {
1772                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
1773                                    "for configuration file '%s'.",
1774                                    iface->confname);
1775                         return -1;
1776                 }
1777                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
1778                            iface->confname, wpa_s->confname);
1779 #else /* CONFIG_BACKEND_FILE */
1780                 wpa_s->confname = os_strdup(iface->confname);
1781 #endif /* CONFIG_BACKEND_FILE */
1782                 wpa_s->conf = wpa_config_read(wpa_s->confname);
1783                 if (wpa_s->conf == NULL) {
1784                         wpa_printf(MSG_ERROR, "Failed to read or parse "
1785                                    "configuration '%s'.", wpa_s->confname);
1786                         return -1;
1787                 }
1788
1789                 /*
1790                  * Override ctrl_interface and driver_param if set on command
1791                  * line.
1792                  */
1793                 if (iface->ctrl_interface) {
1794                         os_free(wpa_s->conf->ctrl_interface);
1795                         wpa_s->conf->ctrl_interface =
1796                                 os_strdup(iface->ctrl_interface);
1797                 }
1798
1799                 if (iface->driver_param) {
1800                         os_free(wpa_s->conf->driver_param);
1801                         wpa_s->conf->driver_param =
1802                                 os_strdup(iface->driver_param);
1803                 }
1804         } else
1805                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
1806                                                      iface->driver_param);
1807
1808         if (wpa_s->conf == NULL) {
1809                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
1810                 return -1;
1811         }
1812
1813         if (iface->ifname == NULL) {
1814                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
1815                 return -1;
1816         }
1817         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
1818                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
1819                            iface->ifname);
1820                 return -1;
1821         }
1822         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
1823
1824         if (iface->bridge_ifname) {
1825                 if (os_strlen(iface->bridge_ifname) >=
1826                     sizeof(wpa_s->bridge_ifname)) {
1827                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
1828                                    "name '%s'.", iface->bridge_ifname);
1829                         return -1;
1830                 }
1831                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
1832                            sizeof(wpa_s->bridge_ifname));
1833         }
1834
1835         /* RSNA Supplicant Key Management - INITIALIZE */
1836         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1837         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1838
1839         /* Initialize driver interface and register driver event handler before
1840          * L2 receive handler so that association events are processed before
1841          * EAPOL-Key packets if both become available for the same select()
1842          * call. */
1843         driver = iface->driver;
1844 next_driver:
1845         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
1846                 return -1;
1847
1848         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
1849         if (wpa_s->drv_priv == NULL) {
1850                 const char *pos;
1851                 pos = os_strchr(driver, ',');
1852                 if (pos) {
1853                         wpa_printf(MSG_DEBUG, "Failed to initialize driver "
1854                                    "interface - try next driver wrapper");
1855                         driver = pos + 1;
1856                         goto next_driver;
1857                 }
1858                 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
1859                 return -1;
1860         }
1861         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
1862                 wpa_printf(MSG_ERROR, "Driver interface rejected "
1863                            "driver_param '%s'", wpa_s->conf->driver_param);
1864                 return -1;
1865         }
1866
1867         ifname = wpa_drv_get_ifname(wpa_s);
1868         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
1869                 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
1870                            "name with '%s'", ifname);
1871                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
1872         }
1873
1874         if (wpa_supplicant_init_wpa(wpa_s) < 0)
1875                 return -1;
1876
1877         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
1878                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
1879                           NULL);
1880         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
1881
1882         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
1883             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
1884                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
1885                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1886                            "dot11RSNAConfigPMKLifetime");
1887                 return -1;
1888         }
1889
1890         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
1891             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
1892                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
1893                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1894                         "dot11RSNAConfigPMKReauthThreshold");
1895                 return -1;
1896         }
1897
1898         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
1899             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
1900                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
1901                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1902                            "dot11RSNAConfigSATimeout");
1903                 return -1;
1904         }
1905
1906         if (wpa_supplicant_driver_init(wpa_s) < 0)
1907                 return -1;
1908
1909         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
1910             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
1911                 wpa_printf(MSG_DEBUG, "Failed to set country");
1912                 return -1;
1913         }
1914
1915         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
1916
1917         if (wpas_wps_init(wpa_s))
1918                 return -1;
1919
1920         if (wpa_supplicant_init_eapol(wpa_s) < 0)
1921                 return -1;
1922         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
1923
1924         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
1925         if (wpa_s->ctrl_iface == NULL) {
1926                 wpa_printf(MSG_ERROR,
1927                            "Failed to initialize control interface '%s'.\n"
1928                            "You may have another wpa_supplicant process "
1929                            "already running or the file was\n"
1930                            "left by an unclean termination of wpa_supplicant "
1931                            "in which case you will need\n"
1932                            "to manually remove this file before starting "
1933                            "wpa_supplicant again.\n",
1934                            wpa_s->conf->ctrl_interface);
1935                 return -1;
1936         }
1937
1938         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
1939                 wpa_s->drv_flags = capa.flags;
1940                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1941                         if (ieee80211_sta_init(wpa_s))
1942                                 return -1;
1943                 }
1944                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
1945         }
1946
1947 #ifdef CONFIG_IBSS_RSN
1948         wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
1949         if (!wpa_s->ibss_rsn) {
1950                 wpa_printf(MSG_DEBUG, "Failed to init IBSS RSN");
1951                 return -1;
1952         }
1953 #endif /* CONFIG_IBSS_RSN */
1954
1955         return 0;
1956 }
1957
1958
1959 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s)
1960 {
1961         if (wpa_s->drv_priv) {
1962                 wpa_supplicant_deauthenticate(wpa_s,
1963                                               WLAN_REASON_DEAUTH_LEAVING);
1964
1965                 /* Backwards compatibility call to set_wpa() handler. This is
1966                  * called only just after init and just before deinit, so these
1967                  * handler can be used to implement same functionality. */
1968                 if (wpa_drv_set_wpa(wpa_s, 0) < 0) {
1969                         wpa_printf(MSG_ERROR, "Failed to disable WPA in the "
1970                                    "driver.");
1971                 }
1972
1973                 wpa_drv_set_drop_unencrypted(wpa_s, 0);
1974                 wpa_drv_set_countermeasures(wpa_s, 0);
1975                 wpa_clear_keys(wpa_s, NULL);
1976         }
1977
1978         wpas_dbus_unregister_iface(wpa_s);
1979
1980         wpa_supplicant_cleanup(wpa_s);
1981
1982         if (wpa_s->drv_priv)
1983                 wpa_drv_deinit(wpa_s);
1984 }
1985
1986
1987 /**
1988  * wpa_supplicant_add_iface - Add a new network interface
1989  * @global: Pointer to global data from wpa_supplicant_init()
1990  * @iface: Interface configuration options
1991  * Returns: Pointer to the created interface or %NULL on failure
1992  *
1993  * This function is used to add new network interfaces for %wpa_supplicant.
1994  * This can be called before wpa_supplicant_run() to add interfaces before the
1995  * main event loop has been started. In addition, new interfaces can be added
1996  * dynamically while %wpa_supplicant is already running. This could happen,
1997  * e.g., when a hotplug network adapter is inserted.
1998  */
1999 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2000                                                  struct wpa_interface *iface)
2001 {
2002         struct wpa_supplicant *wpa_s;
2003
2004         if (global == NULL || iface == NULL)
2005                 return NULL;
2006
2007         wpa_s = wpa_supplicant_alloc();
2008         if (wpa_s == NULL)
2009                 return NULL;
2010
2011         if (wpa_supplicant_init_iface(wpa_s, iface)) {
2012                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2013                            iface->ifname);
2014                 wpa_supplicant_deinit_iface(wpa_s);
2015                 os_free(wpa_s);
2016                 return NULL;
2017         }
2018
2019         wpa_s->global = global;
2020
2021         /* Register the interface with the dbus control interface */
2022         if (wpas_dbus_register_iface(wpa_s)) {
2023                 wpa_supplicant_deinit_iface(wpa_s);
2024                 os_free(wpa_s);
2025                 return NULL;
2026         }
2027
2028         wpa_s->next = global->ifaces;
2029         global->ifaces = wpa_s;
2030
2031         wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2032
2033         return wpa_s;
2034 }
2035
2036
2037 /**
2038  * wpa_supplicant_remove_iface - Remove a network interface
2039  * @global: Pointer to global data from wpa_supplicant_init()
2040  * @wpa_s: Pointer to the network interface to be removed
2041  * Returns: 0 if interface was removed, -1 if interface was not found
2042  *
2043  * This function can be used to dynamically remove network interfaces from
2044  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2045  * addition, this function is used to remove all remaining interfaces when
2046  * %wpa_supplicant is terminated.
2047  */
2048 int wpa_supplicant_remove_iface(struct wpa_global *global,
2049                                 struct wpa_supplicant *wpa_s)
2050 {
2051         struct wpa_supplicant *prev;
2052
2053         /* Remove interface from the global list of interfaces */
2054         prev = global->ifaces;
2055         if (prev == wpa_s) {
2056                 global->ifaces = wpa_s->next;
2057         } else {
2058                 while (prev && prev->next != wpa_s)
2059                         prev = prev->next;
2060                 if (prev == NULL)
2061                         return -1;
2062                 prev->next = wpa_s->next;
2063         }
2064
2065         wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2066
2067         wpa_supplicant_deinit_iface(wpa_s);
2068         os_free(wpa_s);
2069
2070         return 0;
2071 }
2072
2073
2074 /**
2075  * wpa_supplicant_get_iface - Get a new network interface
2076  * @global: Pointer to global data from wpa_supplicant_init()
2077  * @ifname: Interface name
2078  * Returns: Pointer to the interface or %NULL if not found
2079  */
2080 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2081                                                  const char *ifname)
2082 {
2083         struct wpa_supplicant *wpa_s;
2084
2085         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2086                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2087                         return wpa_s;
2088         }
2089         return NULL;
2090 }
2091
2092
2093 /**
2094  * wpa_supplicant_init - Initialize %wpa_supplicant
2095  * @params: Parameters for %wpa_supplicant
2096  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2097  *
2098  * This function is used to initialize %wpa_supplicant. After successful
2099  * initialization, the returned data pointer can be used to add and remove
2100  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2101  */
2102 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2103 {
2104         struct wpa_global *global;
2105         int ret, i;
2106
2107         if (params == NULL)
2108                 return NULL;
2109
2110         wpa_debug_open_file(params->wpa_debug_file_path);
2111         if (params->wpa_debug_syslog)
2112                 wpa_debug_open_syslog();
2113
2114         ret = eap_peer_register_methods();
2115         if (ret) {
2116                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2117                 if (ret == -2)
2118                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2119                                    "the same EAP type.");
2120                 return NULL;
2121         }
2122
2123         global = os_zalloc(sizeof(*global));
2124         if (global == NULL)
2125                 return NULL;
2126         global->params.daemonize = params->daemonize;
2127         global->params.wait_for_monitor = params->wait_for_monitor;
2128         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2129         if (params->pid_file)
2130                 global->params.pid_file = os_strdup(params->pid_file);
2131         if (params->ctrl_interface)
2132                 global->params.ctrl_interface =
2133                         os_strdup(params->ctrl_interface);
2134         wpa_debug_level = global->params.wpa_debug_level =
2135                 params->wpa_debug_level;
2136         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2137                 params->wpa_debug_show_keys;
2138         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2139                 params->wpa_debug_timestamp;
2140
2141         if (eloop_init(global)) {
2142                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2143                 wpa_supplicant_deinit(global);
2144                 return NULL;
2145         }
2146
2147         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2148         if (global->ctrl_iface == NULL) {
2149                 wpa_supplicant_deinit(global);
2150                 return NULL;
2151         }
2152
2153         if (global->params.dbus_ctrl_interface) {
2154                 global->dbus_ctrl_iface =
2155                         wpa_supplicant_dbus_ctrl_iface_init(global);
2156                 if (global->dbus_ctrl_iface == NULL) {
2157                         wpa_supplicant_deinit(global);
2158                         return NULL;
2159                 }
2160         }
2161
2162         for (i = 0; wpa_supplicant_drivers[i]; i++)
2163                 global->drv_count++;
2164         if (global->drv_count == 0) {
2165                 wpa_printf(MSG_ERROR, "No drivers enabled");
2166                 wpa_supplicant_deinit(global);
2167                 return NULL;
2168         }
2169         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2170         if (global->drv_priv == NULL) {
2171                 wpa_supplicant_deinit(global);
2172                 return NULL;
2173         }
2174         for (i = 0; wpa_supplicant_drivers[i]; i++) {
2175                 if (!wpa_supplicant_drivers[i]->global_init)
2176                         continue;
2177                 global->drv_priv[i] = wpa_supplicant_drivers[i]->global_init();
2178                 if (global->drv_priv[i] == NULL) {
2179                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
2180                                    "'%s'", wpa_supplicant_drivers[i]->name);
2181                         wpa_supplicant_deinit(global);
2182                         return NULL;
2183                 }
2184         }
2185
2186         return global;
2187 }
2188
2189
2190 /**
2191  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2192  * @global: Pointer to global data from wpa_supplicant_init()
2193  * Returns: 0 after successful event loop run, -1 on failure
2194  *
2195  * This function starts the main event loop and continues running as long as
2196  * there are any remaining events. In most cases, this function is running as
2197  * long as the %wpa_supplicant process in still in use.
2198  */
2199 int wpa_supplicant_run(struct wpa_global *global)
2200 {
2201         struct wpa_supplicant *wpa_s;
2202
2203         if (global->params.daemonize &&
2204             wpa_supplicant_daemon(global->params.pid_file))
2205                 return -1;
2206
2207         if (global->params.wait_for_monitor) {
2208                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2209                         if (wpa_s->ctrl_iface)
2210                                 wpa_supplicant_ctrl_iface_wait(
2211                                         wpa_s->ctrl_iface);
2212         }
2213
2214         eloop_register_signal_terminate(wpa_supplicant_terminate, NULL);
2215         eloop_register_signal_reconfig(wpa_supplicant_reconfig, NULL);
2216
2217         eloop_run();
2218
2219         return 0;
2220 }
2221
2222
2223 /**
2224  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2225  * @global: Pointer to global data from wpa_supplicant_init()
2226  *
2227  * This function is called to deinitialize %wpa_supplicant and to free all
2228  * allocated resources. Remaining network interfaces will also be removed.
2229  */
2230 void wpa_supplicant_deinit(struct wpa_global *global)
2231 {
2232         int i;
2233
2234         if (global == NULL)
2235                 return;
2236
2237         while (global->ifaces)
2238                 wpa_supplicant_remove_iface(global, global->ifaces);
2239
2240         if (global->ctrl_iface)
2241                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2242         if (global->dbus_ctrl_iface)
2243                 wpa_supplicant_dbus_ctrl_iface_deinit(global->dbus_ctrl_iface);
2244
2245         eap_peer_unregister_methods();
2246
2247         for (i = 0; wpa_supplicant_drivers[i] && global->drv_priv; i++) {
2248                 if (!global->drv_priv[i])
2249                         continue;
2250                 wpa_supplicant_drivers[i]->global_deinit(global->drv_priv[i]);
2251         }
2252         os_free(global->drv_priv);
2253
2254         eloop_destroy();
2255
2256         if (global->params.pid_file) {
2257                 os_daemonize_terminate(global->params.pid_file);
2258                 os_free(global->params.pid_file);
2259         }
2260         os_free(global->params.ctrl_interface);
2261
2262         os_free(global);
2263         wpa_debug_close_syslog();
2264         wpa_debug_close_file();
2265 }