wpa_supplicant/wpa_supplicant.c

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