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

   1 /*
   2  * WPA Supplicant
   3  * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements functions for registering and unregistering
  15  * %wpa_supplicant interfaces. In addition, this file contains number of
  16  * functions for managing network connections.
  17  */
  18
  19 #include "includes.h"
  20
  21 #include "common.h"
  22 #include "eapol_supp/eapol_supp_sm.h"
  23 #include "eap_peer/eap.h"
  24 #include "wpa.h"
  25 #include "eloop.h"
  26 #include "drivers/driver.h"
  27 #include "config.h"
  28 #include "l2_packet/l2_packet.h"
  29 #include "wpa_supplicant_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
 118 /* Configure default/group WEP keys for static WEP */
 119 static int wpa_set_wep_keys(struct wpa_supplicant *wpa_s,
 120                             struct wpa_ssid *ssid)
 121 {
 122         int i, set = 0;
 123
 124         for (i = 0; i < NUM_WEP_KEYS; i++) {
 125                 if (ssid->wep_key_len[i] == 0)
 126                         continue;
 127
 128                 set = 1;
 129                 wpa_drv_set_key(wpa_s, WPA_ALG_WEP,
 130                                 (u8 *) "\xff\xff\xff\xff\xff\xff",
 131                                 i, i == ssid->wep_tx_keyidx, (u8 *) "", 0,
 132                                 ssid->wep_key[i], ssid->wep_key_len[i]);
 133         }
 134
 135         return set;
 136 }
 137
 138
 139 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
 140                                            struct wpa_ssid *ssid)
 141 {
 142         u8 key[32];
 143         size_t keylen;
 144         wpa_alg alg;
 145         u8 seq[6] = { 0 };
 146
 147         /* IBSS/WPA-None uses only one key (Group) for both receiving and
 148          * sending unicast and multicast packets. */
 149
 150         if (ssid->mode != IEEE80211_MODE_IBSS) {
 151                 wpa_printf(MSG_INFO, "WPA: Invalid mode %d (not IBSS/ad-hoc) "
 152                            "for WPA-None", ssid->mode);
 153                 return -1;
 154         }
 155
 156         if (!ssid->psk_set) {
 157                 wpa_printf(MSG_INFO, "WPA: No PSK configured for WPA-None");
 158                 return -1;
 159         }
 160
 161         switch (wpa_s->group_cipher) {
 162         case WPA_CIPHER_CCMP:
 163                 os_memcpy(key, ssid->psk, 16);
 164                 keylen = 16;
 165                 alg = WPA_ALG_CCMP;
 166                 break;
 167         case WPA_CIPHER_TKIP:
 168                 /* WPA-None uses the same Michael MIC key for both TX and RX */
 169                 os_memcpy(key, ssid->psk, 16 + 8);
 170                 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
 171                 keylen = 32;
 172                 alg = WPA_ALG_TKIP;
 173                 break;
 174         default:
 175                 wpa_printf(MSG_INFO, "WPA: Invalid group cipher %d for "
 176                            "WPA-None", wpa_s->group_cipher);
 177                 return -1;
 178         }
 179
 180         /* TODO: should actually remember the previously used seq#, both for TX
 181          * and RX from each STA.. */
 182
 183         return wpa_drv_set_key(wpa_s, alg, (u8 *) "\xff\xff\xff\xff\xff\xff",
 184                                0, 1, seq, 6, key, keylen);
 185 }
 186
 187
 188 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
 189 {
 190         struct wpa_supplicant *wpa_s = eloop_ctx;
 191         const u8 *bssid = wpa_s->bssid;
 192         if (is_zero_ether_addr(bssid))
 193                 bssid = wpa_s->pending_bssid;
 194         wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
 195                 MAC2STR(bssid));
 196         wpa_blacklist_add(wpa_s, bssid);
 197         wpa_sm_notify_disassoc(wpa_s->wpa);
 198         wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 199         wpa_s->reassociate = 1;
 200         wpa_supplicant_req_scan(wpa_s, 0, 0);
 201 }
 202
 203
 204 /**
 205  * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
 206  * @wpa_s: Pointer to wpa_supplicant data
 207  * @sec: Number of seconds after which to time out authentication
 208  * @usec: Number of microseconds after which to time out authentication
 209  *
 210  * This function is used to schedule a timeout for the current authentication
 211  * attempt.
 212  */
 213 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
 214                                      int sec, int usec)
 215 {
 216         if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
 217             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 218                 return;
 219
 220         wpa_msg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
 221                 "%d usec", sec, usec);
 222         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 223         eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
 224 }
 225
 226
 227 /**
 228  * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
 229  * @wpa_s: Pointer to wpa_supplicant data
 230  *
 231  * This function is used to cancel authentication timeout scheduled with
 232  * wpa_supplicant_req_auth_timeout() and it is called when authentication has
 233  * been completed.
 234  */
 235 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
 236 {
 237         wpa_msg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
 238         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 239         wpa_blacklist_del(wpa_s, wpa_s->bssid);
 240 }
 241
 242
 243 /**
 244  * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
 245  * @wpa_s: Pointer to wpa_supplicant data
 246  *
 247  * This function is used to configure EAPOL state machine based on the selected
 248  * authentication mode.
 249  */
 250 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
 251 {
 252 #ifdef IEEE8021X_EAPOL
 253         struct eapol_config eapol_conf;
 254         struct wpa_ssid *ssid = wpa_s->current_ssid;
 255
 256 #ifdef CONFIG_IBSS_RSN
 257         if (ssid->mode == IEEE80211_MODE_IBSS &&
 258             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
 259             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
 260                 /*
 261                  * RSN IBSS authentication is per-STA and we can disable the
 262                  * per-BSSID EAPOL authentication.
 263                  */
 264                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 265                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 266                 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 267                 return;
 268         }
 269 #endif /* CONFIG_IBSS_RSN */
 270
 271         eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 272         eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 273
 274         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 275             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 276                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 277         else
 278                 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
 279
 280         os_memset(&eapol_conf, 0, sizeof(eapol_conf));
 281         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 282                 eapol_conf.accept_802_1x_keys = 1;
 283                 eapol_conf.required_keys = 0;
 284                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
 285                         eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
 286                 }
 287                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
 288                         eapol_conf.required_keys |=
 289                                 EAPOL_REQUIRE_KEY_BROADCAST;
 290                 }
 291
 292                 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 293                         eapol_conf.required_keys = 0;
 294         }
 295         if (wpa_s->conf)
 296                 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
 297         eapol_conf.workaround = ssid->eap_workaround;
 298         eapol_conf.eap_disabled =
 299                 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
 300                 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 301                 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
 302         eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
 303 #endif /* IEEE8021X_EAPOL */
 304 }
 305
 306
 307 /**
 308  * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
 309  * @wpa_s: Pointer to wpa_supplicant data
 310  * @ssid: Configuration data for the network
 311  *
 312  * This function is used to configure WPA state machine and related parameters
 313  * to a mode where WPA is not enabled. This is called as part of the
 314  * authentication configuration when the selected network does not use WPA.
 315  */
 316 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 317                                        struct wpa_ssid *ssid)
 318 {
 319         int i;
 320
 321         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 322                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
 323         else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
 324                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 325         else
 326                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 327         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 328         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 329         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 330         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 331         wpa_s->group_cipher = WPA_CIPHER_NONE;
 332         wpa_s->mgmt_group_cipher = 0;
 333
 334         for (i = 0; i < NUM_WEP_KEYS; i++) {
 335                 if (ssid->wep_key_len[i] > 5) {
 336                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
 337                         wpa_s->group_cipher = WPA_CIPHER_WEP104;
 338                         break;
 339                 } else if (ssid->wep_key_len[i] > 0) {
 340                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
 341                         wpa_s->group_cipher = WPA_CIPHER_WEP40;
 342                         break;
 343                 }
 344         }
 345
 346         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
 347         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 348         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 349                          wpa_s->pairwise_cipher);
 350         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 351 #ifdef CONFIG_IEEE80211W
 352         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 353                          wpa_s->mgmt_group_cipher);
 354 #endif /* CONFIG_IEEE80211W */
 355
 356         pmksa_cache_clear_current(wpa_s->wpa);
 357 }
 358
 359
 360 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 361 {
 362         scard_deinit(wpa_s->scard);
 363         wpa_s->scard = NULL;
 364         wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
 365         eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
 366         l2_packet_deinit(wpa_s->l2);
 367         wpa_s->l2 = NULL;
 368         if (wpa_s->l2_br) {
 369                 l2_packet_deinit(wpa_s->l2_br);
 370                 wpa_s->l2_br = NULL;
 371         }
 372
 373         if (wpa_s->ctrl_iface) {
 374                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 375                 wpa_s->ctrl_iface = NULL;
 376         }
 377         if (wpa_s->conf != NULL) {
 378                 wpa_config_free(wpa_s->conf);
 379                 wpa_s->conf = NULL;
 380         }
 381
 382         os_free(wpa_s->confname);
 383         wpa_s->confname = NULL;
 384
 385         wpa_sm_set_eapol(wpa_s->wpa, NULL);
 386         eapol_sm_deinit(wpa_s->eapol);
 387         wpa_s->eapol = NULL;
 388
 389         rsn_preauth_deinit(wpa_s->wpa);
 390
 391         pmksa_candidate_free(wpa_s->wpa);
 392         wpa_sm_deinit(wpa_s->wpa);
 393         wpa_s->wpa = NULL;
 394         wpa_blacklist_clear(wpa_s);
 395
 396         wpa_scan_results_free(wpa_s->scan_res);
 397         wpa_s->scan_res = NULL;
 398
 399         wpa_supplicant_cancel_scan(wpa_s);
 400         wpa_supplicant_cancel_auth_timeout(wpa_s);
 401
 402         ieee80211_sta_deinit(wpa_s);
 403
 404         wpas_wps_deinit(wpa_s);
 405
 406 #ifdef CONFIG_IBSS_RSN
 407         ibss_rsn_deinit(wpa_s->ibss_rsn);
 408         wpa_s->ibss_rsn = NULL;
 409 #endif /* CONFIG_IBSS_RSN */
 410
 411 #ifdef CONFIG_SME
 412         os_free(wpa_s->sme.ft_ies);
 413         wpa_s->sme.ft_ies = NULL;
 414         wpa_s->sme.ft_ies_len = 0;
 415 #endif /* CONFIG_SME */
 416 }
 417
 418
 419 /**
 420  * wpa_clear_keys - Clear keys configured for the driver
 421  * @wpa_s: Pointer to wpa_supplicant data
 422  * @addr: Previously used BSSID or %NULL if not available
 423  *
 424  * This function clears the encryption keys that has been previously configured
 425  * for the driver.
 426  */
 427 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
 428 {
 429         u8 *bcast = (u8 *) "\xff\xff\xff\xff\xff\xff";
 430
 431         if (wpa_s->keys_cleared) {
 432                 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
 433                  * timing issues with keys being cleared just before new keys
 434                  * are set or just after association or something similar. This
 435                  * shows up in group key handshake failing often because of the
 436                  * client not receiving the first encrypted packets correctly.
 437                  * Skipping some of the extra key clearing steps seems to help
 438                  * in completing group key handshake more reliably. */
 439                 wpa_printf(MSG_DEBUG, "No keys have been configured - "
 440                            "skip key clearing");
 441                 return;
 442         }
 443
 444         /* MLME-DELETEKEYS.request */
 445         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 0, 0, NULL, 0, NULL, 0);
 446         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 1, 0, NULL, 0, NULL, 0);
 447         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 2, 0, NULL, 0, NULL, 0);
 448         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 3, 0, NULL, 0, NULL, 0);
 449         if (addr) {
 450                 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
 451                                 0);
 452                 /* MLME-SETPROTECTION.request(None) */
 453                 wpa_drv_mlme_setprotection(
 454                         wpa_s, addr,
 455                         MLME_SETPROTECTION_PROTECT_TYPE_NONE,
 456                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 457         }
 458         wpa_s->keys_cleared = 1;
 459 }
 460
 461
 462 /**
 463  * wpa_supplicant_state_txt - Get the connection state name as a text string
 464  * @state: State (wpa_state; WPA_*)
 465  * Returns: The state name as a printable text string
 466  */
 467 const char * wpa_supplicant_state_txt(int state)
 468 {
 469         switch (state) {
 470         case WPA_DISCONNECTED:
 471                 return "DISCONNECTED";
 472         case WPA_INACTIVE:
 473                 return "INACTIVE";
 474         case WPA_SCANNING:
 475                 return "SCANNING";
 476         case WPA_AUTHENTICATING:
 477                 return "AUTHENTICATING";
 478         case WPA_ASSOCIATING:
 479                 return "ASSOCIATING";
 480         case WPA_ASSOCIATED:
 481                 return "ASSOCIATED";
 482         case WPA_4WAY_HANDSHAKE:
 483                 return "4WAY_HANDSHAKE";
 484         case WPA_GROUP_HANDSHAKE:
 485                 return "GROUP_HANDSHAKE";
 486         case WPA_COMPLETED:
 487                 return "COMPLETED";
 488         default:
 489                 return "UNKNOWN";
 490         }
 491 }
 492
 493
 494 /**
 495  * wpa_supplicant_set_state - Set current connection state
 496  * @wpa_s: Pointer to wpa_supplicant data
 497  * @state: The new connection state
 498  *
 499  * This function is called whenever the connection state changes, e.g.,
 500  * association is completed for WPA/WPA2 4-Way Handshake is started.
 501  */
 502 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, wpa_states state)
 503 {
 504         wpa_printf(MSG_DEBUG, "State: %s -> %s",
 505                    wpa_supplicant_state_txt(wpa_s->wpa_state),
 506                    wpa_supplicant_state_txt(state));
 507
 508         wpa_supplicant_dbus_notify_state_change(wpa_s, state,
 509                                                 wpa_s->wpa_state);
 510
 511         if (state == WPA_COMPLETED && wpa_s->new_connection) {
 512 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
 513                 struct wpa_ssid *ssid = wpa_s->current_ssid;
 514                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
 515                         MACSTR " completed %s [id=%d id_str=%s]",
 516                         MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
 517                         "(reauth)" : "(auth)",
 518                         ssid ? ssid->id : -1,
 519                         ssid && ssid->id_str ? ssid->id_str : "");
 520 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
 521                 wpa_s->new_connection = 0;
 522                 wpa_s->reassociated_connection = 1;
 523                 wpa_drv_set_operstate(wpa_s, 1);
 524         } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 525                    state == WPA_ASSOCIATED) {
 526                 wpa_s->new_connection = 1;
 527                 wpa_drv_set_operstate(wpa_s, 0);
 528         }
 529         wpa_s->wpa_state = state;
 530 }
 531
 532
 533 static void wpa_supplicant_terminate(int sig, void *eloop_ctx,
 534                                      void *signal_ctx)
 535 {
 536         struct wpa_global *global = eloop_ctx;
 537         struct wpa_supplicant *wpa_s;
 538         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 539                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
 540                         "received", sig);
 541         }
 542         eloop_terminate();
 543 }
 544
 545
 546 static void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
 547 {
 548         wpa_s->pairwise_cipher = 0;
 549         wpa_s->group_cipher = 0;
 550         wpa_s->mgmt_group_cipher = 0;
 551         wpa_s->key_mgmt = 0;
 552         wpa_s->wpa_state = WPA_DISCONNECTED;
 553 }
 554
 555
 556 /**
 557  * wpa_supplicant_reload_configuration - Reload configuration data
 558  * @wpa_s: Pointer to wpa_supplicant data
 559  * Returns: 0 on success or -1 if configuration parsing failed
 560  *
 561  * This function can be used to request that the configuration data is reloaded
 562  * (e.g., after configuration file change). This function is reloading
 563  * configuration only for one interface, so this may need to be called multiple
 564  * times if %wpa_supplicant is controlling multiple interfaces and all
 565  * interfaces need reconfiguration.
 566  */
 567 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
 568 {
 569         struct wpa_config *conf;
 570         int reconf_ctrl;
 571         if (wpa_s->confname == NULL)
 572                 return -1;
 573         conf = wpa_config_read(wpa_s->confname);
 574         if (conf == NULL) {
 575                 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
 576                         "file '%s' - exiting", wpa_s->confname);
 577                 return -1;
 578         }
 579
 580         reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
 581                 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
 582                     os_strcmp(conf->ctrl_interface,
 583                               wpa_s->conf->ctrl_interface) != 0);
 584
 585         if (reconf_ctrl && wpa_s->ctrl_iface) {
 586                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 587                 wpa_s->ctrl_iface = NULL;
 588         }
 589
 590         eapol_sm_invalidate_cached_session(wpa_s->eapol);
 591         wpa_s->current_ssid = NULL;
 592         /*
 593          * TODO: should notify EAPOL SM about changes in opensc_engine_path,
 594          * pkcs11_engine_path, pkcs11_module_path.
 595          */
 596         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 597                 /*
 598                  * Clear forced success to clear EAP state for next
 599                  * authentication.
 600                  */
 601                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 602         }
 603         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 604         wpa_sm_set_config(wpa_s->wpa, NULL);
 605         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
 606         rsn_preauth_deinit(wpa_s->wpa);
 607         wpa_config_free(wpa_s->conf);
 608         wpa_s->conf = conf;
 609         if (reconf_ctrl)
 610                 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
 611
 612         wpa_supplicant_clear_status(wpa_s);
 613         wpa_s->reassociate = 1;
 614         wpa_supplicant_req_scan(wpa_s, 0, 0);
 615         wpa_msg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
 616         return 0;
 617 }
 618
 619
 620 static void wpa_supplicant_reconfig(int sig, void *eloop_ctx,
 621                                     void *signal_ctx)
 622 {
 623         struct wpa_global *global = eloop_ctx;
 624         struct wpa_supplicant *wpa_s;
 625         wpa_printf(MSG_DEBUG, "Signal %d received - reconfiguring", sig);
 626         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 627                 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
 628                         eloop_terminate();
 629                 }
 630         }
 631 }
 632
 633
 634 static wpa_cipher cipher_suite2driver(int cipher)
 635 {
 636         switch (cipher) {
 637         case WPA_CIPHER_NONE:
 638                 return CIPHER_NONE;
 639         case WPA_CIPHER_WEP40:
 640                 return CIPHER_WEP40;
 641         case WPA_CIPHER_WEP104:
 642                 return CIPHER_WEP104;
 643         case WPA_CIPHER_CCMP:
 644                 return CIPHER_CCMP;
 645         case WPA_CIPHER_TKIP:
 646         default:
 647                 return CIPHER_TKIP;
 648         }
 649 }
 650
 651
 652 static wpa_key_mgmt key_mgmt2driver(int key_mgmt)
 653 {
 654         switch (key_mgmt) {
 655         case WPA_KEY_MGMT_NONE:
 656                 return KEY_MGMT_NONE;
 657         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
 658                 return KEY_MGMT_802_1X_NO_WPA;
 659         case WPA_KEY_MGMT_IEEE8021X:
 660                 return KEY_MGMT_802_1X;
 661         case WPA_KEY_MGMT_WPA_NONE:
 662                 return KEY_MGMT_WPA_NONE;
 663         case WPA_KEY_MGMT_FT_IEEE8021X:
 664                 return KEY_MGMT_FT_802_1X;
 665         case WPA_KEY_MGMT_FT_PSK:
 666                 return KEY_MGMT_FT_PSK;
 667         case WPA_KEY_MGMT_IEEE8021X_SHA256:
 668                 return KEY_MGMT_802_1X_SHA256;
 669         case WPA_KEY_MGMT_PSK_SHA256:
 670                 return KEY_MGMT_PSK_SHA256;
 671         case WPA_KEY_MGMT_WPS:
 672                 return KEY_MGMT_WPS;
 673         case WPA_KEY_MGMT_PSK:
 674         default:
 675                 return KEY_MGMT_PSK;
 676         }
 677 }
 678
 679
 680 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
 681                                          struct wpa_ssid *ssid,
 682                                          struct wpa_ie_data *ie)
 683 {
 684         int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
 685         if (ret) {
 686                 if (ret == -2) {
 687                         wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
 688                                 "from association info");
 689                 }
 690                 return -1;
 691         }
 692
 693         wpa_printf(MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set cipher "
 694                    "suites");
 695         if (!(ie->group_cipher & ssid->group_cipher)) {
 696                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
 697                         "cipher 0x%x (mask 0x%x) - reject",
 698                         ie->group_cipher, ssid->group_cipher);
 699                 return -1;
 700         }
 701         if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
 702                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
 703                         "cipher 0x%x (mask 0x%x) - reject",
 704                         ie->pairwise_cipher, ssid->pairwise_cipher);
 705                 return -1;
 706         }
 707         if (!(ie->key_mgmt & ssid->key_mgmt)) {
 708                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
 709                         "management 0x%x (mask 0x%x) - reject",
 710                         ie->key_mgmt, ssid->key_mgmt);
 711                 return -1;
 712         }
 713
 714 #ifdef CONFIG_IEEE80211W
 715         if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
 716             ssid->ieee80211w == IEEE80211W_REQUIRED) {
 717                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
 718                         "that does not support management frame protection - "
 719                         "reject");
 720                 return -1;
 721         }
 722 #endif /* CONFIG_IEEE80211W */
 723
 724         return 0;
 725 }
 726
 727
 728 /**
 729  * wpa_supplicant_set_suites - Set authentication and encryption parameters
 730  * @wpa_s: Pointer to wpa_supplicant data
 731  * @bss: Scan results for the selected BSS, or %NULL if not available
 732  * @ssid: Configuration data for the selected network
 733  * @wpa_ie: Buffer for the WPA/RSN IE
 734  * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
 735  * used buffer length in case the functions returns success.
 736  * Returns: 0 on success or -1 on failure
 737  *
 738  * This function is used to configure authentication and encryption parameters
 739  * based on the network configuration and scan result for the selected BSS (if
 740  * available).
 741  */
 742 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 743                               struct wpa_scan_res *bss,
 744                               struct wpa_ssid *ssid,
 745                               u8 *wpa_ie, size_t *wpa_ie_len)
 746 {
 747         struct wpa_ie_data ie;
 748         int sel, proto;
 749         const u8 *bss_wpa, *bss_rsn;
 750
 751         if (bss) {
 752                 bss_wpa = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 753                 bss_rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 754         } else
 755                 bss_wpa = bss_rsn = NULL;
 756
 757         if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
 758             wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
 759             (ie.group_cipher & ssid->group_cipher) &&
 760             (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 761             (ie.key_mgmt & ssid->key_mgmt)) {
 762                 wpa_msg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
 763                 proto = WPA_PROTO_RSN;
 764         } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
 765                    wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
 766                    (ie.group_cipher & ssid->group_cipher) &&
 767                    (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 768                    (ie.key_mgmt & ssid->key_mgmt)) {
 769                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
 770                 proto = WPA_PROTO_WPA;
 771         } else if (bss) {
 772                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
 773                 return -1;
 774         } else {
 775                 if (ssid->proto & WPA_PROTO_RSN)
 776                         proto = WPA_PROTO_RSN;
 777                 else
 778                         proto = WPA_PROTO_WPA;
 779                 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
 780                         os_memset(&ie, 0, sizeof(ie));
 781                         ie.group_cipher = ssid->group_cipher;
 782                         ie.pairwise_cipher = ssid->pairwise_cipher;
 783                         ie.key_mgmt = ssid->key_mgmt;
 784 #ifdef CONFIG_IEEE80211W
 785                         ie.mgmt_group_cipher =
 786                                 ssid->ieee80211w != NO_IEEE80211W ?
 787                                 WPA_CIPHER_AES_128_CMAC : 0;
 788 #endif /* CONFIG_IEEE80211W */
 789                         wpa_printf(MSG_DEBUG, "WPA: Set cipher suites based "
 790                                    "on configuration");
 791                 } else
 792                         proto = ie.proto;
 793         }
 794
 795         wpa_printf(MSG_DEBUG, "WPA: Selected cipher suites: group %d "
 796                    "pairwise %d key_mgmt %d proto %d",
 797                    ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
 798 #ifdef CONFIG_IEEE80211W
 799         if (ssid->ieee80211w) {
 800                 wpa_printf(MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
 801                            ie.mgmt_group_cipher);
 802         }
 803 #endif /* CONFIG_IEEE80211W */
 804
 805         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
 806         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
 807                          !!(ssid->proto & WPA_PROTO_RSN));
 808
 809         if (bss || !wpa_s->ap_ies_from_associnfo) {
 810                 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
 811                                          bss_wpa ? 2 + bss_wpa[1] : 0) ||
 812                     wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
 813                                          bss_rsn ? 2 + bss_rsn[1] : 0))
 814                         return -1;
 815         }
 816
 817         sel = ie.group_cipher & ssid->group_cipher;
 818         if (sel & WPA_CIPHER_CCMP) {
 819                 wpa_s->group_cipher = WPA_CIPHER_CCMP;
 820                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
 821         } else if (sel & WPA_CIPHER_TKIP) {
 822                 wpa_s->group_cipher = WPA_CIPHER_TKIP;
 823                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
 824         } else if (sel & WPA_CIPHER_WEP104) {
 825                 wpa_s->group_cipher = WPA_CIPHER_WEP104;
 826                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
 827         } else if (sel & WPA_CIPHER_WEP40) {
 828                 wpa_s->group_cipher = WPA_CIPHER_WEP40;
 829                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
 830         } else {
 831                 wpa_printf(MSG_WARNING, "WPA: Failed to select group cipher.");
 832                 return -1;
 833         }
 834
 835         sel = ie.pairwise_cipher & ssid->pairwise_cipher;
 836         if (sel & WPA_CIPHER_CCMP) {
 837                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 838                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
 839         } else if (sel & WPA_CIPHER_TKIP) {
 840                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 841                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
 842         } else if (sel & WPA_CIPHER_NONE) {
 843                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 844                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
 845         } else {
 846                 wpa_printf(MSG_WARNING, "WPA: Failed to select pairwise "
 847                            "cipher.");
 848                 return -1;
 849         }
 850
 851         sel = ie.key_mgmt & ssid->key_mgmt;
 852         if (0) {
 853 #ifdef CONFIG_IEEE80211R
 854         } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
 855                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
 856                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
 857         } else if (sel & WPA_KEY_MGMT_FT_PSK) {
 858                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
 859                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
 860 #endif /* CONFIG_IEEE80211R */
 861 #ifdef CONFIG_IEEE80211W
 862         } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
 863                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
 864                 wpa_msg(wpa_s, MSG_DEBUG,
 865                         "WPA: using KEY_MGMT 802.1X with SHA256");
 866         } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
 867                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
 868                 wpa_msg(wpa_s, MSG_DEBUG,
 869                         "WPA: using KEY_MGMT PSK with SHA256");
 870 #endif /* CONFIG_IEEE80211W */
 871         } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
 872                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 873                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
 874         } else if (sel & WPA_KEY_MGMT_PSK) {
 875                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
 876                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
 877         } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
 878                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
 879                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
 880         } else {
 881                 wpa_printf(MSG_WARNING, "WPA: Failed to select authenticated "
 882                            "key management type.");
 883                 return -1;
 884         }
 885
 886         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 887         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 888                          wpa_s->pairwise_cipher);
 889         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 890
 891 #ifdef CONFIG_IEEE80211W
 892         sel = ie.mgmt_group_cipher;
 893         if (ssid->ieee80211w == NO_IEEE80211W ||
 894             !(ie.capabilities & WPA_CAPABILITY_MFPC))
 895                 sel = 0;
 896         if (sel & WPA_CIPHER_AES_128_CMAC) {
 897                 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
 898                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
 899                         "AES-128-CMAC");
 900         } else {
 901                 wpa_s->mgmt_group_cipher = 0;
 902                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
 903         }
 904         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 905                          wpa_s->mgmt_group_cipher);
 906 #endif /* CONFIG_IEEE80211W */
 907
 908         if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
 909                 wpa_printf(MSG_WARNING, "WPA: Failed to generate WPA IE.");
 910                 return -1;
 911         }
 912
 913         if (ssid->key_mgmt &
 914             (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
 915                 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
 916         else
 917                 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
 918
 919         return 0;
 920 }
 921
 922
 923 /**
 924  * wpa_supplicant_associate - Request association
 925  * @wpa_s: Pointer to wpa_supplicant data
 926  * @bss: Scan results for the selected BSS, or %NULL if not available
 927  * @ssid: Configuration data for the selected network
 928  *
 929  * This function is used to request %wpa_supplicant to associate with a BSS.
 930  */
 931 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
 932                               struct wpa_scan_res *bss, struct wpa_ssid *ssid)
 933 {
 934         u8 wpa_ie[80];
 935         size_t wpa_ie_len;
 936         int use_crypt, ret, i;
 937         int algs = AUTH_ALG_OPEN_SYSTEM;
 938         wpa_cipher cipher_pairwise, cipher_group;
 939         struct wpa_driver_associate_params params;
 940         int wep_keys_set = 0;
 941         struct wpa_driver_capa capa;
 942         int assoc_failed = 0;
 943
 944         if (ssid->mode == 2) {
 945 #ifdef CONFIG_AP
 946                 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
 947                         wpa_printf(MSG_INFO, "Driver does not support AP "
 948                                    "mode");
 949                         return;
 950                 }
 951                 wpa_supplicant_create_ap(wpa_s, ssid);
 952 #else /* CONFIG_AP */
 953                 wpa_printf(MSG_ERROR, "AP mode support not included in the "
 954                            "build");
 955 #endif /* CONFIG_AP */
 956                 return;
 957         }
 958
 959         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) {
 960                 sme_authenticate(wpa_s, bss, ssid);
 961                 return;
 962         }
 963
 964         wpa_s->reassociate = 0;
 965         if (bss) {
 966 #ifdef CONFIG_IEEE80211R
 967                 const u8 *md = NULL;
 968 #endif /* CONFIG_IEEE80211R */
 969                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 970                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 971                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
 972                         ie ? wpa_ssid_txt(ie + 2, ie[1]) : "", bss->freq);
 973                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
 974                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 975 #ifdef CONFIG_IEEE80211R
 976                 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 977                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 978                         md = ie + 2;
 979                 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
 980                 if (md) {
 981                         /* Prepare for the next transition */
 982                         wpa_ft_prepare_auth_request(wpa_s->wpa);
 983                 }
 984 #endif /* CONFIG_IEEE80211R */
 985 #ifdef CONFIG_WPS
 986         } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
 987                    wpa_s->conf->ap_scan == 2 &&
 988                    (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 989                 /* Use ap_scan==1 style network selection to find the network
 990                  */
 991                 wpa_s->scan_req = 2;
 992                 wpa_s->reassociate = 1;
 993                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 994                 return;
 995 #endif /* CONFIG_WPS */
 996         } else {
 997                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
 998                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 999                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1000         }
1001         wpa_supplicant_cancel_scan(wpa_s);
1002
1003         /* Starting new association, so clear the possibly used WPA IE from the
1004          * previous association. */
1005         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1006
1007         if (wpa_drv_set_mode(wpa_s, ssid->mode)) {
1008                 wpa_printf(MSG_WARNING, "Failed to set operating mode");
1009                 assoc_failed = 1;
1010         }
1011
1012 #ifdef IEEE8021X_EAPOL
1013         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1014                 if (ssid->leap) {
1015                         if (ssid->non_leap == 0)
1016                                 algs = AUTH_ALG_LEAP;
1017                         else
1018                                 algs |= AUTH_ALG_LEAP;
1019                 }
1020         }
1021 #endif /* IEEE8021X_EAPOL */
1022         wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1023         if (ssid->auth_alg) {
1024                 algs = 0;
1025                 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
1026                         algs |= AUTH_ALG_OPEN_SYSTEM;
1027                 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
1028                         algs |= AUTH_ALG_SHARED_KEY;
1029                 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
1030                         algs |= AUTH_ALG_LEAP;
1031                 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
1032                            algs);
1033         }
1034         wpa_drv_set_auth_alg(wpa_s, algs);
1035
1036         if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1037                     wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
1038             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1039                                WPA_KEY_MGMT_FT_IEEE8021X |
1040                                WPA_KEY_MGMT_FT_PSK |
1041                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
1042                                WPA_KEY_MGMT_PSK_SHA256))) {
1043                 int try_opportunistic;
1044                 try_opportunistic = ssid->proactive_key_caching &&
1045                         (ssid->proto & WPA_PROTO_RSN);
1046                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1047                                             wpa_s->current_ssid,
1048                                             try_opportunistic) == 0)
1049                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1050                 wpa_ie_len = sizeof(wpa_ie);
1051                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1052                                               wpa_ie, &wpa_ie_len)) {
1053                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1054                                    "management and encryption suites");
1055                         return;
1056                 }
1057         } else if (ssid->key_mgmt &
1058                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1059                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1060                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1061                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1062                 wpa_ie_len = sizeof(wpa_ie);
1063                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1064                                               wpa_ie, &wpa_ie_len)) {
1065                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1066                                    "management and encryption suites (no scan "
1067                                    "results)");
1068                         return;
1069                 }
1070 #ifdef CONFIG_WPS
1071         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1072                 struct wpabuf *wps_ie;
1073                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1074                 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1075                         wpa_ie_len = wpabuf_len(wps_ie);
1076                         os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1077                 } else
1078                         wpa_ie_len = 0;
1079                 wpabuf_free(wps_ie);
1080                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1081 #endif /* CONFIG_WPS */
1082         } else {
1083                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1084                 wpa_ie_len = 0;
1085         }
1086
1087         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1088         use_crypt = 1;
1089         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1090         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1091         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1092             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1093                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1094                         use_crypt = 0;
1095                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1096                         use_crypt = 1;
1097                         wep_keys_set = 1;
1098                 }
1099         }
1100         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1101                 use_crypt = 0;
1102
1103 #ifdef IEEE8021X_EAPOL
1104         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1105                 if ((ssid->eapol_flags &
1106                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1107                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1108                     !wep_keys_set) {
1109                         use_crypt = 0;
1110                 } else {
1111                         /* Assume that dynamic WEP-104 keys will be used and
1112                          * set cipher suites in order for drivers to expect
1113                          * encryption. */
1114                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1115                 }
1116         }
1117 #endif /* IEEE8021X_EAPOL */
1118
1119         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1120                 /* Set the key before (and later after) association */
1121                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1122         }
1123
1124         wpa_drv_set_drop_unencrypted(wpa_s, use_crypt);
1125         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1126         os_memset(&params, 0, sizeof(params));
1127         if (bss) {
1128                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1129                 params.bssid = bss->bssid;
1130                 params.ssid = ie ? ie + 2 : (u8 *) "";
1131                 params.ssid_len = ie ? ie[1] : 0;
1132                 params.freq = bss->freq;
1133         } else {
1134                 params.ssid = ssid->ssid;
1135                 params.ssid_len = ssid->ssid_len;
1136         }
1137         if (ssid->mode == 1 && ssid->frequency > 0 && params.freq == 0)
1138                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1139         params.wpa_ie = wpa_ie;
1140         params.wpa_ie_len = wpa_ie_len;
1141         params.pairwise_suite = cipher_pairwise;
1142         params.group_suite = cipher_group;
1143         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1144         params.auth_alg = algs;
1145         params.mode = ssid->mode;
1146         for (i = 0; i < NUM_WEP_KEYS; i++) {
1147                 if (ssid->wep_key_len[i])
1148                         params.wep_key[i] = ssid->wep_key[i];
1149                 params.wep_key_len[i] = ssid->wep_key_len[i];
1150         }
1151         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1152
1153         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1154             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1155              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1156                 params.passphrase = ssid->passphrase;
1157                 if (ssid->psk_set)
1158                         params.psk = ssid->psk;
1159         }
1160
1161         params.drop_unencrypted = use_crypt;
1162
1163 #ifdef CONFIG_IEEE80211W
1164         switch (ssid->ieee80211w) {
1165         case NO_IEEE80211W:
1166                 params.mgmt_frame_protection = NO_MGMT_FRAME_PROTECTION;
1167                 break;
1168         case IEEE80211W_OPTIONAL:
1169                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_OPTIONAL;
1170                 break;
1171         case IEEE80211W_REQUIRED:
1172                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_REQUIRED;
1173                 break;
1174         }
1175         if (ssid->ieee80211w != NO_IEEE80211W && bss) {
1176                 const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
1177                 struct wpa_ie_data ie;
1178                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1179                     ie.capabilities &
1180                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1181                         wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
1182                                    "require MFP");
1183                         params.mgmt_frame_protection =
1184                                 MGMT_FRAME_PROTECTION_REQUIRED;
1185                 }
1186         }
1187 #endif /* CONFIG_IEEE80211W */
1188
1189         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1190                 ret = ieee80211_sta_associate(wpa_s, &params);
1191         else
1192                 ret = wpa_drv_associate(wpa_s, &params);
1193         if (ret < 0) {
1194                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1195                         "failed");
1196                 /* try to continue anyway; new association will be tried again
1197                  * after timeout */
1198                 assoc_failed = 1;
1199         }
1200
1201         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1202                 /* Set the key after the association just in case association
1203                  * cleared the previously configured key. */
1204                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1205                 /* No need to timeout authentication since there is no key
1206                  * management. */
1207                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1208                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1209 #ifdef CONFIG_IBSS_RSN
1210         } else if (ssid->mode == IEEE80211_MODE_IBSS &&
1211                    wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1212                    wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1213                 ibss_rsn_set_psk(wpa_s->ibss_rsn, ssid->psk);
1214                 /*
1215                  * RSN IBSS authentication is per-STA and we can disable the
1216                  * per-BSSID authentication.
1217                  */
1218                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1219                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1220 #endif /* CONFIG_IBSS_RSN */
1221         } else {
1222                 /* Timeout for IEEE 802.11 authentication and association */
1223                 int timeout = 60;
1224
1225                 if (assoc_failed) {
1226                         /* give IBSS a bit more time */
1227                         timeout = ssid->mode ? 10 : 5;
1228                 } else if (wpa_s->conf->ap_scan == 1) {
1229                         /* give IBSS a bit more time */
1230                         timeout = ssid->mode ? 20 : 10;
1231                 }
1232                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1233         }
1234
1235         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1236             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1237                 /* Set static WEP keys again */
1238                 wpa_set_wep_keys(wpa_s, ssid);
1239         }
1240
1241         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1242                 /*
1243                  * Do not allow EAP session resumption between different
1244                  * network configurations.
1245                  */
1246                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1247         }
1248         wpa_s->current_ssid = ssid;
1249         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1250         wpa_supplicant_initiate_eapol(wpa_s);
1251 }
1252
1253
1254 /**
1255  * wpa_supplicant_disassociate - Disassociate the current connection
1256  * @wpa_s: Pointer to wpa_supplicant data
1257  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1258  *
1259  * This function is used to request %wpa_supplicant to disassociate with the
1260  * current AP.
1261  */
1262 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1263                                  int reason_code)
1264 {
1265         u8 *addr = NULL;
1266         if (!is_zero_ether_addr(wpa_s->bssid)) {
1267                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1268                         ieee80211_sta_disassociate(wpa_s, reason_code);
1269                 else
1270                         wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1271                 addr = wpa_s->bssid;
1272         }
1273         wpa_clear_keys(wpa_s, addr);
1274         wpa_supplicant_mark_disassoc(wpa_s);
1275         wpa_s->current_ssid = NULL;
1276         wpa_sm_set_config(wpa_s->wpa, NULL);
1277         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1278 }
1279
1280
1281 /**
1282  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1283  * @wpa_s: Pointer to wpa_supplicant data
1284  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1285  *
1286  * This function is used to request %wpa_supplicant to deauthenticate from the
1287  * current AP.
1288  */
1289 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1290                                    int reason_code)
1291 {
1292         u8 *addr = NULL;
1293         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1294         if (!is_zero_ether_addr(wpa_s->bssid)) {
1295                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1296                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1297                 else
1298                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1299                                                reason_code);
1300                 addr = wpa_s->bssid;
1301         }
1302         wpa_clear_keys(wpa_s, addr);
1303         wpa_s->current_ssid = NULL;
1304         wpa_sm_set_config(wpa_s->wpa, NULL);
1305         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1306         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1307         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1308 }
1309
1310
1311 static int wpa_supplicant_get_scan_results_old(struct wpa_supplicant *wpa_s)
1312 {
1313 #define SCAN_AP_LIMIT 128
1314         struct wpa_scan_result *results;
1315         int num, i;
1316         struct wpa_scan_results *res;
1317
1318         results = os_malloc(SCAN_AP_LIMIT * sizeof(struct wpa_scan_result));
1319         if (results == NULL) {
1320                 wpa_printf(MSG_WARNING, "Failed to allocate memory for scan "
1321                            "results");
1322                 return -1;
1323         }
1324
1325         num = wpa_drv_get_scan_results(wpa_s, results, SCAN_AP_LIMIT);
1326         wpa_printf(MSG_DEBUG, "Scan results: %d", num);
1327         if (num < 0) {
1328                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1329                 os_free(results);
1330                 return -1;
1331         }
1332         if (num > SCAN_AP_LIMIT) {
1333                 wpa_printf(MSG_INFO, "Not enough room for all APs (%d < %d)",
1334                            num, SCAN_AP_LIMIT);
1335                 num = SCAN_AP_LIMIT;
1336         }
1337
1338         wpa_scan_results_free(wpa_s->scan_res);
1339         wpa_s->scan_res = NULL;
1340
1341         /* Convert old scan result data structure to the new one */
1342         res = os_zalloc(sizeof(*res));
1343         if (res == NULL) {
1344                 os_free(results);
1345                 return -1;
1346         }
1347         res->res = os_zalloc(num * sizeof(struct wpa_scan_res *));
1348         if (res->res == NULL) {
1349                 os_free(results);
1350                 os_free(res);
1351                 return -1;
1352         }
1353
1354         for (i = 0; i < num; i++) {
1355                 struct wpa_scan_result *bss = &results[i];
1356                 struct wpa_scan_res *r;
1357                 size_t ie_len;
1358                 u8 *pos;
1359
1360                 ie_len = 2 + bss->ssid_len + bss->rsn_ie_len + bss->wpa_ie_len;
1361                 if (bss->maxrate)
1362                         ie_len += 3;
1363                 if (bss->mdie_present)
1364                         ie_len += 5;
1365
1366                 r = os_zalloc(sizeof(*r) + ie_len);
1367                 if (r == NULL)
1368                         break;
1369
1370                 os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
1371                 r->freq = bss->freq;
1372                 r->caps = bss->caps;
1373                 r->qual = bss->qual;
1374                 r->noise = bss->noise;
1375                 r->level = bss->level;
1376                 r->tsf = bss->tsf;
1377                 r->ie_len = ie_len;
1378
1379                 pos = (u8 *) (r + 1);
1380
1381                 /* SSID IE */
1382                 *pos++ = WLAN_EID_SSID;
1383                 *pos++ = bss->ssid_len;
1384                 os_memcpy(pos, bss->ssid, bss->ssid_len);
1385                 pos += bss->ssid_len;
1386
1387                 if (bss->maxrate) {
1388                         /* Fake Supported Rate IE to include max rate */
1389                         *pos++ = WLAN_EID_SUPP_RATES;
1390                         *pos++ = 1;
1391                         *pos++ = bss->maxrate;
1392                 }
1393
1394                 if (bss->rsn_ie_len) {
1395                         os_memcpy(pos, bss->rsn_ie, bss->rsn_ie_len);
1396                         pos += bss->rsn_ie_len;
1397                 }
1398
1399                 if (bss->mdie_present) {
1400                         os_memcpy(pos, bss->mdie, 5);
1401                         pos += 5;
1402                 }
1403
1404                 if (bss->wpa_ie_len) {
1405                         os_memcpy(pos, bss->wpa_ie, bss->wpa_ie_len);
1406                         pos += bss->wpa_ie_len;
1407                 }
1408
1409                 res->res[res->num++] = r;
1410         }
1411
1412         os_free(results);
1413         wpa_s->scan_res = res;
1414
1415         return 0;
1416 }
1417
1418
1419 /**
1420  * wpa_supplicant_get_scan_results - Get scan results
1421  * @wpa_s: Pointer to wpa_supplicant data
1422  * Returns: 0 on success, -1 on failure
1423  *
1424  * This function is request the current scan results from the driver and stores
1425  * a local copy of the results in wpa_s->scan_res.
1426  */
1427 int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s)
1428 {
1429         int ret;
1430
1431         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1432                 wpa_scan_results_free(wpa_s->scan_res);
1433                 wpa_s->scan_res = ieee80211_sta_get_scan_results(wpa_s);
1434                 if (wpa_s->scan_res == NULL) {
1435                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1436                         ret = -1;
1437                 } else
1438                         ret = 0;
1439         } else if (wpa_s->driver->get_scan_results2 == NULL)
1440                 ret = wpa_supplicant_get_scan_results_old(wpa_s);
1441         else {
1442                 wpa_scan_results_free(wpa_s->scan_res);
1443                 wpa_s->scan_res = wpa_drv_get_scan_results2(wpa_s);
1444                 if (wpa_s->scan_res == NULL) {
1445                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1446                         ret = -1;
1447                 } else
1448                         ret = 0;
1449         }
1450
1451         if (wpa_s->scan_res)
1452                 wpa_scan_sort_results(wpa_s->scan_res);
1453
1454         return ret;
1455 }
1456
1457
1458 /**
1459  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1460  * @wpa_s: Pointer to wpa_supplicant data
1461  * Returns: A pointer to the current network structure or %NULL on failure
1462  */
1463 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1464 {
1465         struct wpa_ssid *entry;
1466         u8 ssid[MAX_SSID_LEN];
1467         int res;
1468         size_t ssid_len;
1469         u8 bssid[ETH_ALEN];
1470         int wired;
1471
1472         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1473                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1474                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1475                                    "MLME.");
1476                         return NULL;
1477                 }
1478         } else {
1479                 res = wpa_drv_get_ssid(wpa_s, ssid);
1480                 if (res < 0) {
1481                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1482                                    "driver.");
1483                         return NULL;
1484                 }
1485                 ssid_len = res;
1486         }
1487
1488         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1489                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1490         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1491                 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1492                 return NULL;
1493         }
1494
1495         wired = wpa_s->conf->ap_scan == 0 &&
1496                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1497
1498         entry = wpa_s->conf->ssid;
1499         while (entry) {
1500                 if (!entry->disabled &&
1501                     ((ssid_len == entry->ssid_len &&
1502                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1503                     (!entry->bssid_set ||
1504                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1505                         return entry;
1506 #ifdef CONFIG_WPS
1507                 if (!entry->disabled &&
1508                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1509                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1510                     (!entry->bssid_set ||
1511                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1512                         return entry;
1513 #endif /* CONFIG_WPS */
1514                 entry = entry->next;
1515         }
1516
1517         return NULL;
1518 }
1519
1520
1521 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1522                                      const char *name)
1523 {
1524         int i;
1525         size_t len;
1526         const char *pos;
1527
1528         if (wpa_s == NULL)
1529                 return -1;
1530
1531         if (wpa_supplicant_drivers[0] == NULL) {
1532                 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1533                            "wpa_supplicant.");
1534                 return -1;
1535         }
1536
1537         if (name == NULL) {
1538                 /* default to first driver in the list */
1539                 wpa_s->driver = wpa_supplicant_drivers[0];
1540                 return 0;
1541         }
1542
1543         pos = os_strchr(name, ',');
1544         if (pos)
1545                 len = pos - name;
1546         else
1547                 len = os_strlen(name);
1548         for (i = 0; wpa_supplicant_drivers[i]; i++) {
1549                 if (os_strlen(wpa_supplicant_drivers[i]->name) == len &&
1550                     os_strncmp(name, wpa_supplicant_drivers[i]->name, len) ==
1551                     0) {
1552                         wpa_s->driver = wpa_supplicant_drivers[i];
1553                         return 0;
1554                 }
1555         }
1556
1557         wpa_printf(MSG_ERROR, "Unsupported driver '%s'.", name);
1558         return -1;
1559 }
1560
1561
1562 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1563                              const u8 *buf, size_t len)
1564 {
1565         struct wpa_supplicant *wpa_s = ctx;
1566
1567         wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1568         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1569
1570         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1571                 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1572                            "no key management is configured");
1573                 return;
1574         }
1575
1576         if (wpa_s->eapol_received == 0 &&
1577             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1578              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1579              wpa_s->wpa_state != WPA_COMPLETED)) {
1580                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1581                 wpa_supplicant_req_auth_timeout(
1582                         wpa_s,
1583                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1584                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1585                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1586                         70 : 10, 0);
1587         }
1588         wpa_s->eapol_received++;
1589
1590         if (wpa_s->countermeasures) {
1591                 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1592                            "packet");
1593                 return;
1594         }
1595
1596 #ifdef CONFIG_IBSS_RSN
1597         if (wpa_s->current_ssid &&
1598             wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS) {
1599                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1600                 return;
1601         }
1602 #endif /* CONFIG_IBSS_RSN */
1603
1604         /* Source address of the incoming EAPOL frame could be compared to the
1605          * current BSSID. However, it is possible that a centralized
1606          * Authenticator could be using another MAC address than the BSSID of
1607          * an AP, so just allow any address to be used for now. The replies are
1608          * still sent to the current BSSID (if available), though. */
1609
1610         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1611         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1612             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1613                 return;
1614         wpa_drv_poll(wpa_s);
1615         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1616                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1617         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1618                 /*
1619                  * Set portValid = TRUE here since we are going to skip 4-way
1620                  * handshake processing which would normally set portValid. We
1621                  * need this to allow the EAPOL state machines to be completed
1622                  * without going through EAPOL-Key handshake.
1623                  */
1624                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1625         }
1626 }
1627
1628
1629 void wpa_supplicant_sta_free_hw_features(struct wpa_hw_modes *hw_features,
1630                                          size_t num_hw_features)
1631 {
1632         ieee80211_sta_free_hw_features(hw_features, num_hw_features);
1633 }
1634
1635
1636 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1637                            struct ieee80211_rx_status *rx_status)
1638 {
1639         struct wpa_supplicant *wpa_s = ctx;
1640         ieee80211_sta_rx(wpa_s, buf, len, rx_status);
1641 }
1642
1643
1644 /**
1645  * wpa_supplicant_driver_init - Initialize driver interface parameters
1646  * @wpa_s: Pointer to wpa_supplicant data
1647  * Returns: 0 on success, -1 on failure
1648  *
1649  * This function is called to initialize driver interface parameters.
1650  * wpa_drv_init() must have been called before this function to initialize the
1651  * driver interface.
1652  */
1653 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1654 {
1655         static int interface_count = 0;
1656
1657         if (wpa_s->driver->send_eapol) {
1658                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1659                 if (addr)
1660                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1661         } else {
1662                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1663                                            wpa_drv_get_mac_addr(wpa_s),
1664                                            ETH_P_EAPOL,
1665                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1666                 if (wpa_s->l2 == NULL)
1667                         return -1;
1668         }
1669
1670         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1671                 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1672                 return -1;
1673         }
1674
1675         wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1676                    MAC2STR(wpa_s->own_addr));
1677
1678         if (wpa_s->bridge_ifname[0]) {
1679                 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1680                            " '%s'", wpa_s->bridge_ifname);
1681                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1682                                               wpa_s->own_addr,
1683                                               ETH_P_EAPOL,
1684                                               wpa_supplicant_rx_eapol, wpa_s,
1685                                               0);
1686                 if (wpa_s->l2_br == NULL) {
1687                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1688                                    "connection for the bridge interface '%s'",
1689                                    wpa_s->bridge_ifname);
1690                         return -1;
1691                 }
1692         }
1693
1694         /* Backwards compatibility call to set_wpa() handler. This is called
1695          * only just after init and just before deinit, so these handler can be
1696          * used to implement same functionality. */
1697         if (wpa_drv_set_wpa(wpa_s, 1) < 0) {
1698                 struct wpa_driver_capa capa;
1699                 if (wpa_drv_get_capa(wpa_s, &capa) < 0 ||
1700                     !(capa.flags & (WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1701                                     WPA_DRIVER_CAPA_KEY_MGMT_WPA2))) {
1702                         wpa_printf(MSG_DEBUG, "Driver does not support WPA.");
1703                         /* Continue to allow non-WPA modes to be used. */
1704                 } else {
1705                         wpa_printf(MSG_ERROR, "Failed to enable WPA in the "
1706                                 "driver.");
1707                         return -1;
1708                 }
1709         }
1710
1711         wpa_clear_keys(wpa_s, NULL);
1712
1713         /* Make sure that TKIP countermeasures are not left enabled (could
1714          * happen if wpa_supplicant is killed during countermeasures. */
1715         wpa_drv_set_countermeasures(wpa_s, 0);
1716
1717         wpa_drv_set_drop_unencrypted(wpa_s, 1);
1718
1719         wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1720         wpa_drv_flush_pmkid(wpa_s);
1721
1722         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1723         wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1724         interface_count++;
1725
1726         return 0;
1727 }
1728
1729
1730 static int wpa_supplicant_daemon(const char *pid_file)
1731 {
1732         wpa_printf(MSG_DEBUG, "Daemonize..");
1733         return os_daemonize(pid_file);
1734 }
1735
1736
1737 static struct wpa_supplicant * wpa_supplicant_alloc(void)
1738 {
1739         struct wpa_supplicant *wpa_s;
1740
1741         wpa_s = os_zalloc(sizeof(*wpa_s));
1742         if (wpa_s == NULL)
1743                 return NULL;
1744         wpa_s->scan_req = 1;
1745
1746         return wpa_s;
1747 }
1748
1749
1750 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
1751                                      struct wpa_interface *iface)
1752 {
1753         const char *ifname, *driver;
1754         struct wpa_driver_capa capa;
1755
1756         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
1757                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
1758                    iface->confname ? iface->confname : "N/A",
1759                    iface->driver ? iface->driver : "default",
1760                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
1761                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
1762
1763         if (iface->confname) {
1764 #ifdef CONFIG_BACKEND_FILE
1765                 wpa_s->confname = os_rel2abs_path(iface->confname);
1766                 if (wpa_s->confname == NULL) {
1767                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
1768                                    "for configuration file '%s'.",
1769                                    iface->confname);
1770                         return -1;
1771                 }
1772                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
1773                            iface->confname, wpa_s->confname);
1774 #else /* CONFIG_BACKEND_FILE */
1775                 wpa_s->confname = os_strdup(iface->confname);
1776 #endif /* CONFIG_BACKEND_FILE */
1777                 wpa_s->conf = wpa_config_read(wpa_s->confname);
1778                 if (wpa_s->conf == NULL) {
1779                         wpa_printf(MSG_ERROR, "Failed to read or parse "
1780                                    "configuration '%s'.", wpa_s->confname);
1781                         return -1;
1782                 }
1783
1784                 /*
1785                  * Override ctrl_interface and driver_param if set on command
1786                  * line.
1787                  */
1788                 if (iface->ctrl_interface) {
1789                         os_free(wpa_s->conf->ctrl_interface);
1790                         wpa_s->conf->ctrl_interface =
1791                                 os_strdup(iface->ctrl_interface);
1792                 }
1793
1794                 if (iface->driver_param) {
1795                         os_free(wpa_s->conf->driver_param);
1796                         wpa_s->conf->driver_param =
1797                                 os_strdup(iface->driver_param);
1798                 }
1799         } else
1800                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
1801                                                      iface->driver_param);
1802
1803         if (wpa_s->conf == NULL) {
1804                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
1805                 return -1;
1806         }
1807
1808         if (iface->ifname == NULL) {
1809                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
1810                 return -1;
1811         }
1812         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
1813                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
1814                            iface->ifname);
1815                 return -1;
1816         }
1817         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
1818
1819         if (iface->bridge_ifname) {
1820                 if (os_strlen(iface->bridge_ifname) >=
1821                     sizeof(wpa_s->bridge_ifname)) {
1822                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
1823                                    "name '%s'.", iface->bridge_ifname);
1824                         return -1;
1825                 }
1826                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
1827                            sizeof(wpa_s->bridge_ifname));
1828         }
1829
1830         /* RSNA Supplicant Key Management - INITIALIZE */
1831         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1832         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1833
1834         /* Initialize driver interface and register driver event handler before
1835          * L2 receive handler so that association events are processed before
1836          * EAPOL-Key packets if both become available for the same select()
1837          * call. */
1838         driver = iface->driver;
1839 next_driver:
1840         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
1841                 return -1;
1842
1843         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
1844         if (wpa_s->drv_priv == NULL) {
1845                 const char *pos;
1846                 pos = os_strchr(driver, ',');
1847                 if (pos) {
1848                         wpa_printf(MSG_DEBUG, "Failed to initialize driver "
1849                                    "interface - try next driver wrapper");
1850                         driver = pos + 1;
1851                         goto next_driver;
1852                 }
1853                 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
1854                 return -1;
1855         }
1856         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
1857                 wpa_printf(MSG_ERROR, "Driver interface rejected "
1858                            "driver_param '%s'", wpa_s->conf->driver_param);
1859                 return -1;
1860         }
1861
1862         ifname = wpa_drv_get_ifname(wpa_s);
1863         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
1864                 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
1865                            "name with '%s'", ifname);
1866                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
1867         }
1868
1869         if (wpa_supplicant_init_wpa(wpa_s) < 0)
1870                 return -1;
1871
1872         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
1873                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
1874                           NULL);
1875         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
1876
1877         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
1878             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
1879                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
1880                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1881                            "dot11RSNAConfigPMKLifetime");
1882                 return -1;
1883         }
1884
1885         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
1886             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
1887                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
1888                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1889                         "dot11RSNAConfigPMKReauthThreshold");
1890                 return -1;
1891         }
1892
1893         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
1894             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
1895                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
1896                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1897                            "dot11RSNAConfigSATimeout");
1898                 return -1;
1899         }
1900
1901         if (wpa_supplicant_driver_init(wpa_s) < 0)
1902                 return -1;
1903
1904         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
1905             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
1906                 wpa_printf(MSG_DEBUG, "Failed to set country");
1907                 return -1;
1908         }
1909
1910         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
1911
1912         if (wpas_wps_init(wpa_s))
1913                 return -1;
1914
1915         if (wpa_supplicant_init_eapol(wpa_s) < 0)
1916                 return -1;
1917         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
1918
1919         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
1920         if (wpa_s->ctrl_iface == NULL) {
1921                 wpa_printf(MSG_ERROR,
1922                            "Failed to initialize control interface '%s'.\n"
1923                            "You may have another wpa_supplicant process "
1924                            "already running or the file was\n"
1925                            "left by an unclean termination of wpa_supplicant "
1926                            "in which case you will need\n"
1927                            "to manually remove this file before starting "
1928                            "wpa_supplicant again.\n",
1929                            wpa_s->conf->ctrl_interface);
1930                 return -1;
1931         }
1932
1933         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
1934                 wpa_s->drv_flags = capa.flags;
1935                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1936                         if (ieee80211_sta_init(wpa_s))
1937                                 return -1;
1938                 }
1939                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
1940         }
1941
1942 #ifdef CONFIG_IBSS_RSN
1943         wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
1944         if (!wpa_s->ibss_rsn) {
1945                 wpa_printf(MSG_DEBUG, "Failed to init IBSS RSN");
1946                 return -1;
1947         }
1948 #endif /* CONFIG_IBSS_RSN */
1949
1950         return 0;
1951 }
1952
1953
1954 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s)
1955 {
1956         if (wpa_s->drv_priv) {
1957                 wpa_supplicant_deauthenticate(wpa_s,
1958                                               WLAN_REASON_DEAUTH_LEAVING);
1959
1960                 /* Backwards compatibility call to set_wpa() handler. This is
1961                  * called only just after init and just before deinit, so these
1962                  * handler can be used to implement same functionality. */
1963                 if (wpa_drv_set_wpa(wpa_s, 0) < 0) {
1964                         wpa_printf(MSG_ERROR, "Failed to disable WPA in the "
1965                                    "driver.");
1966                 }
1967
1968                 wpa_drv_set_drop_unencrypted(wpa_s, 0);
1969                 wpa_drv_set_countermeasures(wpa_s, 0);
1970                 wpa_clear_keys(wpa_s, NULL);
1971         }
1972
1973         wpas_dbus_unregister_iface(wpa_s);
1974
1975         wpa_supplicant_cleanup(wpa_s);
1976
1977         if (wpa_s->drv_priv)
1978                 wpa_drv_deinit(wpa_s);
1979 }
1980
1981
1982 /**
1983  * wpa_supplicant_add_iface - Add a new network interface
1984  * @global: Pointer to global data from wpa_supplicant_init()
1985  * @iface: Interface configuration options
1986  * Returns: Pointer to the created interface or %NULL on failure
1987  *
1988  * This function is used to add new network interfaces for %wpa_supplicant.
1989  * This can be called before wpa_supplicant_run() to add interfaces before the
1990  * main event loop has been started. In addition, new interfaces can be added
1991  * dynamically while %wpa_supplicant is already running. This could happen,
1992  * e.g., when a hotplug network adapter is inserted.
1993  */
1994 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
1995                                                  struct wpa_interface *iface)
1996 {
1997         struct wpa_supplicant *wpa_s;
1998
1999         if (global == NULL || iface == NULL)
2000                 return NULL;
2001
2002         wpa_s = wpa_supplicant_alloc();
2003         if (wpa_s == NULL)
2004                 return NULL;
2005
2006         if (wpa_supplicant_init_iface(wpa_s, iface)) {
2007                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2008                            iface->ifname);
2009                 wpa_supplicant_deinit_iface(wpa_s);
2010                 os_free(wpa_s);
2011                 return NULL;
2012         }
2013
2014         wpa_s->global = global;
2015
2016         /* Register the interface with the dbus control interface */
2017         if (wpas_dbus_register_iface(wpa_s)) {
2018                 wpa_supplicant_deinit_iface(wpa_s);
2019                 os_free(wpa_s);
2020                 return NULL;
2021         }
2022
2023         wpa_s->next = global->ifaces;
2024         global->ifaces = wpa_s;
2025
2026         wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2027
2028         return wpa_s;
2029 }
2030
2031
2032 /**
2033  * wpa_supplicant_remove_iface - Remove a network interface
2034  * @global: Pointer to global data from wpa_supplicant_init()
2035  * @wpa_s: Pointer to the network interface to be removed
2036  * Returns: 0 if interface was removed, -1 if interface was not found
2037  *
2038  * This function can be used to dynamically remove network interfaces from
2039  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2040  * addition, this function is used to remove all remaining interfaces when
2041  * %wpa_supplicant is terminated.
2042  */
2043 int wpa_supplicant_remove_iface(struct wpa_global *global,
2044                                 struct wpa_supplicant *wpa_s)
2045 {
2046         struct wpa_supplicant *prev;
2047
2048         /* Remove interface from the global list of interfaces */
2049         prev = global->ifaces;
2050         if (prev == wpa_s) {
2051                 global->ifaces = wpa_s->next;
2052         } else {
2053                 while (prev && prev->next != wpa_s)
2054                         prev = prev->next;
2055                 if (prev == NULL)
2056                         return -1;
2057                 prev->next = wpa_s->next;
2058         }
2059
2060         wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2061
2062         wpa_supplicant_deinit_iface(wpa_s);
2063         os_free(wpa_s);
2064
2065         return 0;
2066 }
2067
2068
2069 /**
2070  * wpa_supplicant_get_iface - Get a new network interface
2071  * @global: Pointer to global data from wpa_supplicant_init()
2072  * @ifname: Interface name
2073  * Returns: Pointer to the interface or %NULL if not found
2074  */
2075 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2076                                                  const char *ifname)
2077 {
2078         struct wpa_supplicant *wpa_s;
2079
2080         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2081                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2082                         return wpa_s;
2083         }
2084         return NULL;
2085 }
2086
2087
2088 /**
2089  * wpa_supplicant_init - Initialize %wpa_supplicant
2090  * @params: Parameters for %wpa_supplicant
2091  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2092  *
2093  * This function is used to initialize %wpa_supplicant. After successful
2094  * initialization, the returned data pointer can be used to add and remove
2095  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2096  */
2097 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2098 {
2099         struct wpa_global *global;
2100         int ret, i;
2101
2102         if (params == NULL)
2103                 return NULL;
2104
2105         wpa_debug_open_file(params->wpa_debug_file_path);
2106         if (params->wpa_debug_syslog)
2107                 wpa_debug_open_syslog();
2108
2109         ret = eap_peer_register_methods();
2110         if (ret) {
2111                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2112                 if (ret == -2)
2113                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2114                                    "the same EAP type.");
2115                 return NULL;
2116         }
2117
2118         global = os_zalloc(sizeof(*global));
2119         if (global == NULL)
2120                 return NULL;
2121         global->params.daemonize = params->daemonize;
2122         global->params.wait_for_monitor = params->wait_for_monitor;
2123         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2124         if (params->pid_file)
2125                 global->params.pid_file = os_strdup(params->pid_file);
2126         if (params->ctrl_interface)
2127                 global->params.ctrl_interface =
2128                         os_strdup(params->ctrl_interface);
2129         wpa_debug_level = global->params.wpa_debug_level =
2130                 params->wpa_debug_level;
2131         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2132                 params->wpa_debug_show_keys;
2133         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2134                 params->wpa_debug_timestamp;
2135
2136         if (eloop_init(global)) {
2137                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2138                 wpa_supplicant_deinit(global);
2139                 return NULL;
2140         }
2141
2142         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2143         if (global->ctrl_iface == NULL) {
2144                 wpa_supplicant_deinit(global);
2145                 return NULL;
2146         }
2147
2148         if (global->params.dbus_ctrl_interface) {
2149                 global->dbus_ctrl_iface =
2150                         wpa_supplicant_dbus_ctrl_iface_init(global);
2151                 if (global->dbus_ctrl_iface == NULL) {
2152                         wpa_supplicant_deinit(global);
2153                         return NULL;
2154                 }
2155         }
2156
2157         for (i = 0; wpa_supplicant_drivers[i]; i++)
2158                 global->drv_count++;
2159         if (global->drv_count == 0) {
2160                 wpa_printf(MSG_ERROR, "No drivers enabled");
2161                 wpa_supplicant_deinit(global);
2162                 return NULL;
2163         }
2164         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2165         if (global->drv_priv == NULL) {
2166                 wpa_supplicant_deinit(global);
2167                 return NULL;
2168         }
2169         for (i = 0; wpa_supplicant_drivers[i]; i++) {
2170                 if (!wpa_supplicant_drivers[i]->global_init)
2171                         continue;
2172                 global->drv_priv[i] = wpa_supplicant_drivers[i]->global_init();
2173                 if (global->drv_priv[i] == NULL) {
2174                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
2175                                    "'%s'", wpa_supplicant_drivers[i]->name);
2176                         wpa_supplicant_deinit(global);
2177                         return NULL;
2178                 }
2179         }
2180
2181         return global;
2182 }
2183
2184
2185 /**
2186  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2187  * @global: Pointer to global data from wpa_supplicant_init()
2188  * Returns: 0 after successful event loop run, -1 on failure
2189  *
2190  * This function starts the main event loop and continues running as long as
2191  * there are any remaining events. In most cases, this function is running as
2192  * long as the %wpa_supplicant process in still in use.
2193  */
2194 int wpa_supplicant_run(struct wpa_global *global)
2195 {
2196         struct wpa_supplicant *wpa_s;
2197
2198         if (global->params.daemonize &&
2199             wpa_supplicant_daemon(global->params.pid_file))
2200                 return -1;
2201
2202         if (global->params.wait_for_monitor) {
2203                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2204                         if (wpa_s->ctrl_iface)
2205                                 wpa_supplicant_ctrl_iface_wait(
2206                                         wpa_s->ctrl_iface);
2207         }
2208
2209         eloop_register_signal_terminate(wpa_supplicant_terminate, NULL);
2210         eloop_register_signal_reconfig(wpa_supplicant_reconfig, NULL);
2211
2212         eloop_run();
2213
2214         return 0;
2215 }
2216
2217
2218 /**
2219  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2220  * @global: Pointer to global data from wpa_supplicant_init()
2221  *
2222  * This function is called to deinitialize %wpa_supplicant and to free all
2223  * allocated resources. Remaining network interfaces will also be removed.
2224  */
2225 void wpa_supplicant_deinit(struct wpa_global *global)
2226 {
2227         int i;
2228
2229         if (global == NULL)
2230                 return;
2231
2232         while (global->ifaces)
2233                 wpa_supplicant_remove_iface(global, global->ifaces);
2234
2235         if (global->ctrl_iface)
2236                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2237         if (global->dbus_ctrl_iface)
2238                 wpa_supplicant_dbus_ctrl_iface_deinit(global->dbus_ctrl_iface);
2239
2240         eap_peer_unregister_methods();
2241
2242         for (i = 0; wpa_supplicant_drivers[i] && global->drv_priv; i++) {
2243                 if (!global->drv_priv[i])
2244                         continue;
2245                 wpa_supplicant_drivers[i]->global_deinit(global->drv_priv[i]);
2246         }
2247         os_free(global->drv_priv);
2248
2249         eloop_destroy();
2250
2251         if (global->params.pid_file) {
2252                 os_daemonize_terminate(global->params.pid_file);
2253                 os_free(global->params.pid_file);
2254         }
2255         os_free(global->params.ctrl_interface);
2256
2257         os_free(global);
2258         wpa_debug_close_syslog();
2259         wpa_debug_close_file();
2260 }