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 "eapol_supp/eapol_supp_sm.h"
  23 #include "eap_peer/eap.h"
  24 #include "eap_server/eap_methods.h"
  25 #include "rsn_supp/wpa.h"
  26 #include "eloop.h"
  27 #include "config.h"
  28 #include "l2_packet/l2_packet.h"
  29 #include "wpa_supplicant_i.h"
  30 #include "driver_i.h"
  31 #include "ctrl_iface.h"
  32 #include "pcsc_funcs.h"
  33 #include "common/version.h"
  34 #include "rsn_supp/preauth.h"
  35 #include "rsn_supp/pmksa_cache.h"
  36 #include "common/wpa_ctrl.h"
  37 #include "mlme.h"
  38 #include "common/ieee802_11_defs.h"
  39 #include "p2p/p2p.h"
  40 #include "blacklist.h"
  41 #include "wpas_glue.h"
  42 #include "wps_supplicant.h"
  43 #include "ibss_rsn.h"
  44 #include "sme.h"
  45 #include "ap.h"
  46 #include "p2p_supplicant.h"
  47 #include "notify.h"
  48 #include "bgscan.h"
  49 #include "bss.h"
  50 #include "scan.h"
  51
  52 const char *wpa_supplicant_version =
  53 "wpa_supplicant v" VERSION_STR "\n"
  54 "Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi> and contributors";
  55
  56 const char *wpa_supplicant_license =
  57 "This program is free software. You can distribute it and/or modify it\n"
  58 "under the terms of the GNU General Public License version 2.\n"
  59 "\n"
  60 "Alternatively, this software may be distributed under the terms of the\n"
  61 "BSD license. See README and COPYING for more details.\n"
  62 #ifdef EAP_TLS_OPENSSL
  63 "\nThis product includes software developed by the OpenSSL Project\n"
  64 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
  65 #endif /* EAP_TLS_OPENSSL */
  66 ;
  67
  68 #ifndef CONFIG_NO_STDOUT_DEBUG
  69 /* Long text divided into parts in order to fit in C89 strings size limits. */
  70 const char *wpa_supplicant_full_license1 =
  71 "This program is free software; you can redistribute it and/or modify\n"
  72 "it under the terms of the GNU General Public License version 2 as\n"
  73 "published by the Free Software Foundation.\n"
  74 "\n"
  75 "This program is distributed in the hope that it will be useful,\n"
  76 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  77 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  78 "GNU General Public License for more details.\n"
  79 "\n";
  80 const char *wpa_supplicant_full_license2 =
  81 "You should have received a copy of the GNU General Public License\n"
  82 "along with this program; if not, write to the Free Software\n"
  83 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA\n"
  84 "\n"
  85 "Alternatively, this software may be distributed under the terms of the\n"
  86 "BSD license.\n"
  87 "\n"
  88 "Redistribution and use in source and binary forms, with or without\n"
  89 "modification, are permitted provided that the following conditions are\n"
  90 "met:\n"
  91 "\n";
  92 const char *wpa_supplicant_full_license3 =
  93 "1. Redistributions of source code must retain the above copyright\n"
  94 "   notice, this list of conditions and the following disclaimer.\n"
  95 "\n"
  96 "2. Redistributions in binary form must reproduce the above copyright\n"
  97 "   notice, this list of conditions and the following disclaimer in the\n"
  98 "   documentation and/or other materials provided with the distribution.\n"
  99 "\n";
 100 const char *wpa_supplicant_full_license4 =
 101 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
 102 "   names of its contributors may be used to endorse or promote products\n"
 103 "   derived from this software without specific prior written permission.\n"
 104 "\n"
 105 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
 106 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
 107 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
 108 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
 109 const char *wpa_supplicant_full_license5 =
 110 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
 111 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
 112 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
 113 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
 114 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
 115 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
 116 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
 117 "\n";
 118 #endif /* CONFIG_NO_STDOUT_DEBUG */
 119
 120 extern int wpa_debug_level;
 121 extern int wpa_debug_show_keys;
 122 extern int wpa_debug_timestamp;
 123 extern struct wpa_driver_ops *wpa_drivers[];
 124
 125 /* Configure default/group WEP keys for static WEP */
 126 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 127 {
 128         int i, set = 0;
 129
 130         for (i = 0; i < NUM_WEP_KEYS; i++) {
 131                 if (ssid->wep_key_len[i] == 0)
 132                         continue;
 133
 134                 set = 1;
 135                 wpa_drv_set_key(wpa_s, WPA_ALG_WEP, NULL,
 136                                 i, i == ssid->wep_tx_keyidx, NULL, 0,
 137                                 ssid->wep_key[i], ssid->wep_key_len[i]);
 138         }
 139
 140         return set;
 141 }
 142
 143
 144 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
 145                                            struct wpa_ssid *ssid)
 146 {
 147         u8 key[32];
 148         size_t keylen;
 149         enum wpa_alg alg;
 150         u8 seq[6] = { 0 };
 151
 152         /* IBSS/WPA-None uses only one key (Group) for both receiving and
 153          * sending unicast and multicast packets. */
 154
 155         if (ssid->mode != WPAS_MODE_IBSS) {
 156                 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid mode %d (not "
 157                         "IBSS/ad-hoc) for WPA-None", ssid->mode);
 158                 return -1;
 159         }
 160
 161         if (!ssid->psk_set) {
 162                 wpa_msg(wpa_s, MSG_INFO, "WPA: No PSK configured for "
 163                         "WPA-None");
 164                 return -1;
 165         }
 166
 167         switch (wpa_s->group_cipher) {
 168         case WPA_CIPHER_CCMP:
 169                 os_memcpy(key, ssid->psk, 16);
 170                 keylen = 16;
 171                 alg = WPA_ALG_CCMP;
 172                 break;
 173         case WPA_CIPHER_TKIP:
 174                 /* WPA-None uses the same Michael MIC key for both TX and RX */
 175                 os_memcpy(key, ssid->psk, 16 + 8);
 176                 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
 177                 keylen = 32;
 178                 alg = WPA_ALG_TKIP;
 179                 break;
 180         default:
 181                 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid group cipher %d for "
 182                         "WPA-None", wpa_s->group_cipher);
 183                 return -1;
 184         }
 185
 186         /* TODO: should actually remember the previously used seq#, both for TX
 187          * and RX from each STA.. */
 188
 189         return wpa_drv_set_key(wpa_s, alg, NULL, 0, 1, seq, 6, key, keylen);
 190 }
 191
 192
 193 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
 194 {
 195         struct wpa_supplicant *wpa_s = eloop_ctx;
 196         const u8 *bssid = wpa_s->bssid;
 197         if (is_zero_ether_addr(bssid))
 198                 bssid = wpa_s->pending_bssid;
 199         wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
 200                 MAC2STR(bssid));
 201         wpa_blacklist_add(wpa_s, bssid);
 202         wpa_sm_notify_disassoc(wpa_s->wpa);
 203         wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 204         wpa_s->reassociate = 1;
 205
 206         /*
 207          * If we timed out, the AP or the local radio may be busy.
 208          * So, wait a second until scanning again.
 209          */
 210         wpa_supplicant_req_scan(wpa_s, 1, 0);
 211 }
 212
 213
 214 /**
 215  * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
 216  * @wpa_s: Pointer to wpa_supplicant data
 217  * @sec: Number of seconds after which to time out authentication
 218  * @usec: Number of microseconds after which to time out authentication
 219  *
 220  * This function is used to schedule a timeout for the current authentication
 221  * attempt.
 222  */
 223 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
 224                                      int sec, int usec)
 225 {
 226         if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
 227             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 228                 return;
 229
 230         wpa_dbg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
 231                 "%d usec", sec, usec);
 232         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 233         eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
 234 }
 235
 236
 237 /**
 238  * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
 239  * @wpa_s: Pointer to wpa_supplicant data
 240  *
 241  * This function is used to cancel authentication timeout scheduled with
 242  * wpa_supplicant_req_auth_timeout() and it is called when authentication has
 243  * been completed.
 244  */
 245 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
 246 {
 247         wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
 248         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 249         wpa_blacklist_del(wpa_s, wpa_s->bssid);
 250 }
 251
 252
 253 /**
 254  * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
 255  * @wpa_s: Pointer to wpa_supplicant data
 256  *
 257  * This function is used to configure EAPOL state machine based on the selected
 258  * authentication mode.
 259  */
 260 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
 261 {
 262 #ifdef IEEE8021X_EAPOL
 263         struct eapol_config eapol_conf;
 264         struct wpa_ssid *ssid = wpa_s->current_ssid;
 265
 266 #ifdef CONFIG_IBSS_RSN
 267         if (ssid->mode == WPAS_MODE_IBSS &&
 268             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
 269             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
 270                 /*
 271                  * RSN IBSS authentication is per-STA and we can disable the
 272                  * per-BSSID EAPOL authentication.
 273                  */
 274                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 275                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 276                 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 277                 return;
 278         }
 279 #endif /* CONFIG_IBSS_RSN */
 280
 281         eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 282         eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 283
 284         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 285             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 286                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 287         else
 288                 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
 289
 290         os_memset(&eapol_conf, 0, sizeof(eapol_conf));
 291         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 292                 eapol_conf.accept_802_1x_keys = 1;
 293                 eapol_conf.required_keys = 0;
 294                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
 295                         eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
 296                 }
 297                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
 298                         eapol_conf.required_keys |=
 299                                 EAPOL_REQUIRE_KEY_BROADCAST;
 300                 }
 301
 302                 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 303                         eapol_conf.required_keys = 0;
 304         }
 305         if (wpa_s->conf)
 306                 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
 307         eapol_conf.workaround = ssid->eap_workaround;
 308         eapol_conf.eap_disabled =
 309                 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
 310                 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 311                 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
 312         eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
 313 #endif /* IEEE8021X_EAPOL */
 314 }
 315
 316
 317 /**
 318  * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
 319  * @wpa_s: Pointer to wpa_supplicant data
 320  * @ssid: Configuration data for the network
 321  *
 322  * This function is used to configure WPA state machine and related parameters
 323  * to a mode where WPA is not enabled. This is called as part of the
 324  * authentication configuration when the selected network does not use WPA.
 325  */
 326 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 327                                        struct wpa_ssid *ssid)
 328 {
 329         int i;
 330
 331         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 332                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
 333         else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
 334                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 335         else
 336                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 337         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 338         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 339         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 340         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 341         wpa_s->group_cipher = WPA_CIPHER_NONE;
 342         wpa_s->mgmt_group_cipher = 0;
 343
 344         for (i = 0; i < NUM_WEP_KEYS; i++) {
 345                 if (ssid->wep_key_len[i] > 5) {
 346                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
 347                         wpa_s->group_cipher = WPA_CIPHER_WEP104;
 348                         break;
 349                 } else if (ssid->wep_key_len[i] > 0) {
 350                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
 351                         wpa_s->group_cipher = WPA_CIPHER_WEP40;
 352                         break;
 353                 }
 354         }
 355
 356         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
 357         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 358         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 359                          wpa_s->pairwise_cipher);
 360         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 361 #ifdef CONFIG_IEEE80211W
 362         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 363                          wpa_s->mgmt_group_cipher);
 364 #endif /* CONFIG_IEEE80211W */
 365
 366         pmksa_cache_clear_current(wpa_s->wpa);
 367 }
 368
 369
 370 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 371 {
 372         bgscan_deinit(wpa_s);
 373         scard_deinit(wpa_s->scard);
 374         wpa_s->scard = NULL;
 375         wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
 376         eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
 377         l2_packet_deinit(wpa_s->l2);
 378         wpa_s->l2 = NULL;
 379         if (wpa_s->l2_br) {
 380                 l2_packet_deinit(wpa_s->l2_br);
 381                 wpa_s->l2_br = NULL;
 382         }
 383
 384         if (wpa_s->ctrl_iface) {
 385                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 386                 wpa_s->ctrl_iface = NULL;
 387         }
 388         if (wpa_s->conf != NULL) {
 389                 struct wpa_ssid *ssid;
 390                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
 391                         wpas_notify_network_removed(wpa_s, ssid);
 392                 wpa_config_free(wpa_s->conf);
 393                 wpa_s->conf = NULL;
 394         }
 395
 396         os_free(wpa_s->confname);
 397         wpa_s->confname = NULL;
 398
 399         wpa_sm_set_eapol(wpa_s->wpa, NULL);
 400         eapol_sm_deinit(wpa_s->eapol);
 401         wpa_s->eapol = NULL;
 402
 403         rsn_preauth_deinit(wpa_s->wpa);
 404
 405 #ifdef CONFIG_TDLS
 406         wpa_tdls_deinit(wpa_s->wpa);
 407 #endif /* CONFIG_TDLS */
 408
 409         pmksa_candidate_free(wpa_s->wpa);
 410         wpa_sm_deinit(wpa_s->wpa);
 411         wpa_s->wpa = NULL;
 412         wpa_blacklist_clear(wpa_s);
 413
 414         wpa_bss_deinit(wpa_s);
 415
 416         wpa_supplicant_cancel_scan(wpa_s);
 417         wpa_supplicant_cancel_auth_timeout(wpa_s);
 418
 419         ieee80211_sta_deinit(wpa_s);
 420
 421         wpas_wps_deinit(wpa_s);
 422
 423         wpabuf_free(wpa_s->pending_eapol_rx);
 424         wpa_s->pending_eapol_rx = NULL;
 425
 426 #ifdef CONFIG_IBSS_RSN
 427         ibss_rsn_deinit(wpa_s->ibss_rsn);
 428         wpa_s->ibss_rsn = NULL;
 429 #endif /* CONFIG_IBSS_RSN */
 430
 431         sme_deinit(wpa_s);
 432
 433 #ifdef CONFIG_AP
 434         wpa_supplicant_ap_deinit(wpa_s);
 435 #endif /* CONFIG_AP */
 436
 437 #ifdef CONFIG_P2P
 438         wpas_p2p_deinit(wpa_s);
 439 #endif /* CONFIG_P2P */
 440
 441         os_free(wpa_s->next_scan_freqs);
 442         wpa_s->next_scan_freqs = NULL;
 443 }
 444
 445
 446 /**
 447  * wpa_clear_keys - Clear keys configured for the driver
 448  * @wpa_s: Pointer to wpa_supplicant data
 449  * @addr: Previously used BSSID or %NULL if not available
 450  *
 451  * This function clears the encryption keys that has been previously configured
 452  * for the driver.
 453  */
 454 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
 455 {
 456         if (wpa_s->keys_cleared) {
 457                 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
 458                  * timing issues with keys being cleared just before new keys
 459                  * are set or just after association or something similar. This
 460                  * shows up in group key handshake failing often because of the
 461                  * client not receiving the first encrypted packets correctly.
 462                  * Skipping some of the extra key clearing steps seems to help
 463                  * in completing group key handshake more reliably. */
 464                 wpa_dbg(wpa_s, MSG_DEBUG, "No keys have been configured - "
 465                         "skip key clearing");
 466                 return;
 467         }
 468
 469         /* MLME-DELETEKEYS.request */
 470         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 0, 0, NULL, 0, NULL, 0);
 471         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 1, 0, NULL, 0, NULL, 0);
 472         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 2, 0, NULL, 0, NULL, 0);
 473         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 3, 0, NULL, 0, NULL, 0);
 474 #ifdef CONFIG_IEEE80211W
 475         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 4, 0, NULL, 0, NULL, 0);
 476         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 5, 0, NULL, 0, NULL, 0);
 477 #endif /* CONFIG_IEEE80211W */
 478         if (addr) {
 479                 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
 480                                 0);
 481                 /* MLME-SETPROTECTION.request(None) */
 482                 wpa_drv_mlme_setprotection(
 483                         wpa_s, addr,
 484                         MLME_SETPROTECTION_PROTECT_TYPE_NONE,
 485                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 486         }
 487         wpa_s->keys_cleared = 1;
 488 }
 489
 490
 491 /**
 492  * wpa_supplicant_state_txt - Get the connection state name as a text string
 493  * @state: State (wpa_state; WPA_*)
 494  * Returns: The state name as a printable text string
 495  */
 496 const char * wpa_supplicant_state_txt(enum wpa_states state)
 497 {
 498         switch (state) {
 499         case WPA_DISCONNECTED:
 500                 return "DISCONNECTED";
 501         case WPA_INACTIVE:
 502                 return "INACTIVE";
 503         case WPA_INTERFACE_DISABLED:
 504                 return "INTERFACE_DISABLED";
 505         case WPA_SCANNING:
 506                 return "SCANNING";
 507         case WPA_AUTHENTICATING:
 508                 return "AUTHENTICATING";
 509         case WPA_ASSOCIATING:
 510                 return "ASSOCIATING";
 511         case WPA_ASSOCIATED:
 512                 return "ASSOCIATED";
 513         case WPA_4WAY_HANDSHAKE:
 514                 return "4WAY_HANDSHAKE";
 515         case WPA_GROUP_HANDSHAKE:
 516                 return "GROUP_HANDSHAKE";
 517         case WPA_COMPLETED:
 518                 return "COMPLETED";
 519         default:
 520                 return "UNKNOWN";
 521         }
 522 }
 523
 524
 525 #ifdef CONFIG_BGSCAN
 526
 527 static void wpa_supplicant_start_bgscan(struct wpa_supplicant *wpa_s)
 528 {
 529         if (wpa_s->current_ssid == wpa_s->bgscan_ssid)
 530                 return;
 531
 532         bgscan_deinit(wpa_s);
 533         if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
 534                 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
 535                         wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
 536                                 "bgscan");
 537                         /*
 538                          * Live without bgscan; it is only used as a roaming
 539                          * optimization, so the initial connection is not
 540                          * affected.
 541                          */
 542                 } else
 543                         wpa_s->bgscan_ssid = wpa_s->current_ssid;
 544         } else
 545                 wpa_s->bgscan_ssid = NULL;
 546 }
 547
 548
 549 static void wpa_supplicant_stop_bgscan(struct wpa_supplicant *wpa_s)
 550 {
 551         if (wpa_s->bgscan_ssid != NULL) {
 552                 bgscan_deinit(wpa_s);
 553                 wpa_s->bgscan_ssid = NULL;
 554         }
 555 }
 556
 557 #endif /* CONFIG_BGSCAN */
 558
 559
 560 /**
 561  * wpa_supplicant_set_state - Set current connection state
 562  * @wpa_s: Pointer to wpa_supplicant data
 563  * @state: The new connection state
 564  *
 565  * This function is called whenever the connection state changes, e.g.,
 566  * association is completed for WPA/WPA2 4-Way Handshake is started.
 567  */
 568 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
 569                               enum wpa_states state)
 570 {
 571         enum wpa_states old_state = wpa_s->wpa_state;
 572
 573         wpa_dbg(wpa_s, MSG_DEBUG, "State: %s -> %s",
 574                 wpa_supplicant_state_txt(wpa_s->wpa_state),
 575                 wpa_supplicant_state_txt(state));
 576
 577         if (state != WPA_SCANNING)
 578                 wpa_supplicant_notify_scanning(wpa_s, 0);
 579
 580         if (state == WPA_COMPLETED && wpa_s->new_connection) {
 581 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
 582                 struct wpa_ssid *ssid = wpa_s->current_ssid;
 583                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
 584                         MACSTR " completed %s [id=%d id_str=%s]",
 585                         MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
 586                         "(reauth)" : "(auth)",
 587                         ssid ? ssid->id : -1,
 588                         ssid && ssid->id_str ? ssid->id_str : "");
 589 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
 590                 wpa_s->new_connection = 0;
 591                 wpa_s->reassociated_connection = 1;
 592                 wpa_drv_set_operstate(wpa_s, 1);
 593 #ifndef IEEE8021X_EAPOL
 594                 wpa_drv_set_supp_port(wpa_s, 1);
 595 #endif /* IEEE8021X_EAPOL */
 596                 wpa_s->after_wps = 0;
 597 #ifdef CONFIG_P2P
 598                 wpas_p2p_completed(wpa_s);
 599 #endif /* CONFIG_P2P */
 600         } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 601                    state == WPA_ASSOCIATED) {
 602                 wpa_s->new_connection = 1;
 603                 wpa_drv_set_operstate(wpa_s, 0);
 604 #ifndef IEEE8021X_EAPOL
 605                 wpa_drv_set_supp_port(wpa_s, 0);
 606 #endif /* IEEE8021X_EAPOL */
 607         }
 608         wpa_s->wpa_state = state;
 609
 610 #ifdef CONFIG_BGSCAN
 611         if (state == WPA_COMPLETED)
 612                 wpa_supplicant_start_bgscan(wpa_s);
 613         else
 614                 wpa_supplicant_stop_bgscan(wpa_s);
 615 #endif /* CONFIG_BGSCAN */
 616
 617         if (wpa_s->wpa_state != old_state) {
 618                 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
 619
 620                 if (wpa_s->wpa_state == WPA_COMPLETED ||
 621                     old_state == WPA_COMPLETED)
 622                         wpas_notify_auth_changed(wpa_s);
 623         }
 624 }
 625
 626
 627 void wpa_supplicant_terminate_proc(struct wpa_global *global)
 628 {
 629         int pending = 0;
 630 #ifdef CONFIG_WPS
 631         struct wpa_supplicant *wpa_s = global->ifaces;
 632         while (wpa_s) {
 633                 if (wpas_wps_terminate_pending(wpa_s) == 1)
 634                         pending = 1;
 635                 wpa_s = wpa_s->next;
 636         }
 637 #endif /* CONFIG_WPS */
 638         if (pending)
 639                 return;
 640         eloop_terminate();
 641 }
 642
 643
 644 static void wpa_supplicant_terminate(int sig, void *signal_ctx)
 645 {
 646         struct wpa_global *global = signal_ctx;
 647         struct wpa_supplicant *wpa_s;
 648         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 649                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
 650                         "received", sig);
 651         }
 652         wpa_supplicant_terminate_proc(global);
 653 }
 654
 655
 656 void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
 657 {
 658         enum wpa_states old_state = wpa_s->wpa_state;
 659
 660         wpa_s->pairwise_cipher = 0;
 661         wpa_s->group_cipher = 0;
 662         wpa_s->mgmt_group_cipher = 0;
 663         wpa_s->key_mgmt = 0;
 664         if (wpa_s->wpa_state != WPA_INTERFACE_DISABLED)
 665                 wpa_s->wpa_state = WPA_DISCONNECTED;
 666
 667         if (wpa_s->wpa_state != old_state)
 668                 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
 669 }
 670
 671
 672 /**
 673  * wpa_supplicant_reload_configuration - Reload configuration data
 674  * @wpa_s: Pointer to wpa_supplicant data
 675  * Returns: 0 on success or -1 if configuration parsing failed
 676  *
 677  * This function can be used to request that the configuration data is reloaded
 678  * (e.g., after configuration file change). This function is reloading
 679  * configuration only for one interface, so this may need to be called multiple
 680  * times if %wpa_supplicant is controlling multiple interfaces and all
 681  * interfaces need reconfiguration.
 682  */
 683 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
 684 {
 685         struct wpa_config *conf;
 686         struct wpa_ssid *old_ssid;
 687         int reconf_ctrl;
 688         int old_ap_scan;
 689
 690         if (wpa_s->confname == NULL)
 691                 return -1;
 692         conf = wpa_config_read(wpa_s->confname);
 693         if (conf == NULL) {
 694                 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
 695                         "file '%s' - exiting", wpa_s->confname);
 696                 return -1;
 697         }
 698         conf->changed_parameters = (unsigned int) -1;
 699
 700         reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
 701                 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
 702                     os_strcmp(conf->ctrl_interface,
 703                               wpa_s->conf->ctrl_interface) != 0);
 704
 705         if (reconf_ctrl && wpa_s->ctrl_iface) {
 706                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 707                 wpa_s->ctrl_iface = NULL;
 708         }
 709
 710         eapol_sm_invalidate_cached_session(wpa_s->eapol);
 711         old_ssid = wpa_s->current_ssid;
 712         wpa_s->current_ssid = NULL;
 713         if (old_ssid != wpa_s->current_ssid)
 714                 wpas_notify_network_changed(wpa_s);
 715
 716         /*
 717          * TODO: should notify EAPOL SM about changes in opensc_engine_path,
 718          * pkcs11_engine_path, pkcs11_module_path.
 719          */
 720         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 721                 /*
 722                  * Clear forced success to clear EAP state for next
 723                  * authentication.
 724                  */
 725                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 726         }
 727         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 728         wpa_sm_set_config(wpa_s->wpa, NULL);
 729         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
 730         rsn_preauth_deinit(wpa_s->wpa);
 731
 732         old_ap_scan = wpa_s->conf->ap_scan;
 733         wpa_config_free(wpa_s->conf);
 734         wpa_s->conf = conf;
 735         if (old_ap_scan != wpa_s->conf->ap_scan)
 736                 wpas_notify_ap_scan_changed(wpa_s);
 737
 738         if (reconf_ctrl)
 739                 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
 740
 741         wpa_supplicant_update_config(wpa_s);
 742
 743         wpa_supplicant_clear_status(wpa_s);
 744         if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
 745                 wpa_s->reassociate = 1;
 746                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 747         }
 748         wpa_dbg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
 749         return 0;
 750 }
 751
 752
 753 static void wpa_supplicant_reconfig(int sig, void *signal_ctx)
 754 {
 755         struct wpa_global *global = signal_ctx;
 756         struct wpa_supplicant *wpa_s;
 757         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 758                 wpa_dbg(wpa_s, MSG_DEBUG, "Signal %d received - reconfiguring",
 759                         sig);
 760                 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
 761                         wpa_supplicant_terminate_proc(global);
 762                 }
 763         }
 764 }
 765
 766
 767 enum wpa_cipher cipher_suite2driver(int cipher)
 768 {
 769         switch (cipher) {
 770         case WPA_CIPHER_NONE:
 771                 return CIPHER_NONE;
 772         case WPA_CIPHER_WEP40:
 773                 return CIPHER_WEP40;
 774         case WPA_CIPHER_WEP104:
 775                 return CIPHER_WEP104;
 776         case WPA_CIPHER_CCMP:
 777                 return CIPHER_CCMP;
 778         case WPA_CIPHER_TKIP:
 779         default:
 780                 return CIPHER_TKIP;
 781         }
 782 }
 783
 784
 785 enum wpa_key_mgmt key_mgmt2driver(int key_mgmt)
 786 {
 787         switch (key_mgmt) {
 788         case WPA_KEY_MGMT_NONE:
 789                 return KEY_MGMT_NONE;
 790         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
 791                 return KEY_MGMT_802_1X_NO_WPA;
 792         case WPA_KEY_MGMT_IEEE8021X:
 793                 return KEY_MGMT_802_1X;
 794         case WPA_KEY_MGMT_WPA_NONE:
 795                 return KEY_MGMT_WPA_NONE;
 796         case WPA_KEY_MGMT_FT_IEEE8021X:
 797                 return KEY_MGMT_FT_802_1X;
 798         case WPA_KEY_MGMT_FT_PSK:
 799                 return KEY_MGMT_FT_PSK;
 800         case WPA_KEY_MGMT_IEEE8021X_SHA256:
 801                 return KEY_MGMT_802_1X_SHA256;
 802         case WPA_KEY_MGMT_PSK_SHA256:
 803                 return KEY_MGMT_PSK_SHA256;
 804         case WPA_KEY_MGMT_WPS:
 805                 return KEY_MGMT_WPS;
 806         case WPA_KEY_MGMT_PSK:
 807         default:
 808                 return KEY_MGMT_PSK;
 809         }
 810 }
 811
 812
 813 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
 814                                          struct wpa_ssid *ssid,
 815                                          struct wpa_ie_data *ie)
 816 {
 817         int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
 818         if (ret) {
 819                 if (ret == -2) {
 820                         wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
 821                                 "from association info");
 822                 }
 823                 return -1;
 824         }
 825
 826         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set "
 827                 "cipher suites");
 828         if (!(ie->group_cipher & ssid->group_cipher)) {
 829                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
 830                         "cipher 0x%x (mask 0x%x) - reject",
 831                         ie->group_cipher, ssid->group_cipher);
 832                 return -1;
 833         }
 834         if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
 835                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
 836                         "cipher 0x%x (mask 0x%x) - reject",
 837                         ie->pairwise_cipher, ssid->pairwise_cipher);
 838                 return -1;
 839         }
 840         if (!(ie->key_mgmt & ssid->key_mgmt)) {
 841                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
 842                         "management 0x%x (mask 0x%x) - reject",
 843                         ie->key_mgmt, ssid->key_mgmt);
 844                 return -1;
 845         }
 846
 847 #ifdef CONFIG_IEEE80211W
 848         if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
 849             ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
 850                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
 851                         "that does not support management frame protection - "
 852                         "reject");
 853                 return -1;
 854         }
 855 #endif /* CONFIG_IEEE80211W */
 856
 857         return 0;
 858 }
 859
 860
 861 /**
 862  * wpa_supplicant_set_suites - Set authentication and encryption parameters
 863  * @wpa_s: Pointer to wpa_supplicant data
 864  * @bss: Scan results for the selected BSS, or %NULL if not available
 865  * @ssid: Configuration data for the selected network
 866  * @wpa_ie: Buffer for the WPA/RSN IE
 867  * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
 868  * used buffer length in case the functions returns success.
 869  * Returns: 0 on success or -1 on failure
 870  *
 871  * This function is used to configure authentication and encryption parameters
 872  * based on the network configuration and scan result for the selected BSS (if
 873  * available).
 874  */
 875 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 876                               struct wpa_bss *bss, struct wpa_ssid *ssid,
 877                               u8 *wpa_ie, size_t *wpa_ie_len)
 878 {
 879         struct wpa_ie_data ie;
 880         int sel, proto;
 881         const u8 *bss_wpa, *bss_rsn;
 882
 883         if (bss) {
 884                 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 885                 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 886         } else
 887                 bss_wpa = bss_rsn = NULL;
 888
 889         if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
 890             wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
 891             (ie.group_cipher & ssid->group_cipher) &&
 892             (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 893             (ie.key_mgmt & ssid->key_mgmt)) {
 894                 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
 895                 proto = WPA_PROTO_RSN;
 896         } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
 897                    wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
 898                    (ie.group_cipher & ssid->group_cipher) &&
 899                    (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 900                    (ie.key_mgmt & ssid->key_mgmt)) {
 901                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
 902                 proto = WPA_PROTO_WPA;
 903         } else if (bss) {
 904                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
 905                 return -1;
 906         } else {
 907                 if (ssid->proto & WPA_PROTO_RSN)
 908                         proto = WPA_PROTO_RSN;
 909                 else
 910                         proto = WPA_PROTO_WPA;
 911                 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
 912                         os_memset(&ie, 0, sizeof(ie));
 913                         ie.group_cipher = ssid->group_cipher;
 914                         ie.pairwise_cipher = ssid->pairwise_cipher;
 915                         ie.key_mgmt = ssid->key_mgmt;
 916 #ifdef CONFIG_IEEE80211W
 917                         ie.mgmt_group_cipher =
 918                                 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ?
 919                                 WPA_CIPHER_AES_128_CMAC : 0;
 920 #endif /* CONFIG_IEEE80211W */
 921                         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Set cipher suites "
 922                                 "based on configuration");
 923                 } else
 924                         proto = ie.proto;
 925         }
 926
 927         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected cipher suites: group %d "
 928                 "pairwise %d key_mgmt %d proto %d",
 929                 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
 930 #ifdef CONFIG_IEEE80211W
 931         if (ssid->ieee80211w) {
 932                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
 933                         ie.mgmt_group_cipher);
 934         }
 935 #endif /* CONFIG_IEEE80211W */
 936
 937         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
 938         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
 939                          !!(ssid->proto & WPA_PROTO_RSN));
 940
 941         if (bss || !wpa_s->ap_ies_from_associnfo) {
 942                 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
 943                                          bss_wpa ? 2 + bss_wpa[1] : 0) ||
 944                     wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
 945                                          bss_rsn ? 2 + bss_rsn[1] : 0))
 946                         return -1;
 947         }
 948
 949         sel = ie.group_cipher & ssid->group_cipher;
 950         if (sel & WPA_CIPHER_CCMP) {
 951                 wpa_s->group_cipher = WPA_CIPHER_CCMP;
 952                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
 953         } else if (sel & WPA_CIPHER_TKIP) {
 954                 wpa_s->group_cipher = WPA_CIPHER_TKIP;
 955                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
 956         } else if (sel & WPA_CIPHER_WEP104) {
 957                 wpa_s->group_cipher = WPA_CIPHER_WEP104;
 958                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
 959         } else if (sel & WPA_CIPHER_WEP40) {
 960                 wpa_s->group_cipher = WPA_CIPHER_WEP40;
 961                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
 962         } else {
 963                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select group "
 964                         "cipher");
 965                 return -1;
 966         }
 967
 968         sel = ie.pairwise_cipher & ssid->pairwise_cipher;
 969         if (sel & WPA_CIPHER_CCMP) {
 970                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 971                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
 972         } else if (sel & WPA_CIPHER_TKIP) {
 973                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 974                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
 975         } else if (sel & WPA_CIPHER_NONE) {
 976                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 977                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
 978         } else {
 979                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select pairwise "
 980                         "cipher");
 981                 return -1;
 982         }
 983
 984         sel = ie.key_mgmt & ssid->key_mgmt;
 985         if (0) {
 986 #ifdef CONFIG_IEEE80211R
 987         } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
 988                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
 989                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
 990         } else if (sel & WPA_KEY_MGMT_FT_PSK) {
 991                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
 992                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
 993 #endif /* CONFIG_IEEE80211R */
 994 #ifdef CONFIG_IEEE80211W
 995         } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
 996                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
 997                 wpa_dbg(wpa_s, MSG_DEBUG,
 998                         "WPA: using KEY_MGMT 802.1X with SHA256");
 999         } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
1000                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
1001                 wpa_dbg(wpa_s, MSG_DEBUG,
1002                         "WPA: using KEY_MGMT PSK with SHA256");
1003 #endif /* CONFIG_IEEE80211W */
1004         } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
1005                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1006                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
1007         } else if (sel & WPA_KEY_MGMT_PSK) {
1008                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
1009                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
1010         } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
1011                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
1012                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
1013         } else {
1014                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select "
1015                         "authenticated key management type");
1016                 return -1;
1017         }
1018
1019         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
1020         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
1021                          wpa_s->pairwise_cipher);
1022         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
1023
1024 #ifdef CONFIG_IEEE80211W
1025         sel = ie.mgmt_group_cipher;
1026         if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION ||
1027             !(ie.capabilities & WPA_CAPABILITY_MFPC))
1028                 sel = 0;
1029         if (sel & WPA_CIPHER_AES_128_CMAC) {
1030                 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1031                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
1032                         "AES-128-CMAC");
1033         } else {
1034                 wpa_s->mgmt_group_cipher = 0;
1035                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
1036         }
1037         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
1038                          wpa_s->mgmt_group_cipher);
1039         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w);
1040 #endif /* CONFIG_IEEE80211W */
1041
1042         if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
1043                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to generate WPA IE");
1044                 return -1;
1045         }
1046
1047         if (ssid->key_mgmt &
1048             (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
1049                 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
1050         else
1051                 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
1052
1053         return 0;
1054 }
1055
1056
1057 /**
1058  * wpa_supplicant_associate - Request association
1059  * @wpa_s: Pointer to wpa_supplicant data
1060  * @bss: Scan results for the selected BSS, or %NULL if not available
1061  * @ssid: Configuration data for the selected network
1062  *
1063  * This function is used to request %wpa_supplicant to associate with a BSS.
1064  */
1065 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
1066                               struct wpa_bss *bss, struct wpa_ssid *ssid)
1067 {
1068         u8 wpa_ie[200];
1069         size_t wpa_ie_len;
1070         int use_crypt, ret, i, bssid_changed;
1071         int algs = WPA_AUTH_ALG_OPEN;
1072         enum wpa_cipher cipher_pairwise, cipher_group;
1073         struct wpa_driver_associate_params params;
1074         int wep_keys_set = 0;
1075         struct wpa_driver_capa capa;
1076         int assoc_failed = 0;
1077         struct wpa_ssid *old_ssid;
1078
1079         if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO ||
1080             ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
1081 #ifdef CONFIG_AP
1082                 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
1083                         wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP "
1084                                 "mode");
1085                         return;
1086                 }
1087                 wpa_supplicant_create_ap(wpa_s, ssid);
1088                 wpa_s->current_bss = bss;
1089 #else /* CONFIG_AP */
1090                 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in "
1091                         "the build");
1092 #endif /* CONFIG_AP */
1093                 return;
1094         }
1095
1096 #ifdef CONFIG_TDLS
1097         wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1), bss->ie_len);
1098 #endif /* CONFIG_TDLS */
1099
1100         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1101             ssid->mode == IEEE80211_MODE_INFRA) {
1102                 sme_authenticate(wpa_s, bss, ssid);
1103                 return;
1104         }
1105
1106         os_memset(&params, 0, sizeof(params));
1107         wpa_s->reassociate = 0;
1108         if (bss) {
1109 #ifdef CONFIG_IEEE80211R
1110                 const u8 *ie, *md = NULL;
1111 #endif /* CONFIG_IEEE80211R */
1112                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1113                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1114                         wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq);
1115                 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1116                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1117                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1118                 if (bssid_changed)
1119                         wpas_notify_bssid_changed(wpa_s);
1120 #ifdef CONFIG_IEEE80211R
1121                 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1122                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1123                         md = ie + 2;
1124                 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
1125                 if (md) {
1126                         /* Prepare for the next transition */
1127                         wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
1128                 }
1129 #endif /* CONFIG_IEEE80211R */
1130 #ifdef CONFIG_WPS
1131         } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1132                    wpa_s->conf->ap_scan == 2 &&
1133                    (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1134                 /* Use ap_scan==1 style network selection to find the network
1135                  */
1136                 wpa_s->scan_req = 2;
1137                 wpa_s->reassociate = 1;
1138                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1139                 return;
1140 #endif /* CONFIG_WPS */
1141         } else {
1142                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1143                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1144                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1145         }
1146         wpa_supplicant_cancel_scan(wpa_s);
1147
1148         /* Starting new association, so clear the possibly used WPA IE from the
1149          * previous association. */
1150         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1151
1152 #ifdef IEEE8021X_EAPOL
1153         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1154                 if (ssid->leap) {
1155                         if (ssid->non_leap == 0)
1156                                 algs = WPA_AUTH_ALG_LEAP;
1157                         else
1158                                 algs |= WPA_AUTH_ALG_LEAP;
1159                 }
1160         }
1161 #endif /* IEEE8021X_EAPOL */
1162         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1163         if (ssid->auth_alg) {
1164                 algs = ssid->auth_alg;
1165                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
1166                         "0x%x", algs);
1167         }
1168
1169         if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1170                     wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
1171             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1172                                WPA_KEY_MGMT_FT_IEEE8021X |
1173                                WPA_KEY_MGMT_FT_PSK |
1174                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
1175                                WPA_KEY_MGMT_PSK_SHA256))) {
1176                 int try_opportunistic;
1177                 try_opportunistic = ssid->proactive_key_caching &&
1178                         (ssid->proto & WPA_PROTO_RSN);
1179                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1180                                             wpa_s->current_ssid,
1181                                             try_opportunistic) == 0)
1182                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1183                 wpa_ie_len = sizeof(wpa_ie);
1184                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1185                                               wpa_ie, &wpa_ie_len)) {
1186                         wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1187                                 "key management and encryption suites");
1188                         return;
1189                 }
1190         } else if (ssid->key_mgmt &
1191                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1192                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1193                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1194                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1195                 wpa_ie_len = sizeof(wpa_ie);
1196                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1197                                               wpa_ie, &wpa_ie_len)) {
1198                         wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1199                                 "key management and encryption suites (no "
1200                                 "scan results)");
1201                         return;
1202                 }
1203 #ifdef CONFIG_WPS
1204         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1205                 struct wpabuf *wps_ie;
1206                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1207                 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1208                         wpa_ie_len = wpabuf_len(wps_ie);
1209                         os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1210                 } else
1211                         wpa_ie_len = 0;
1212                 wpabuf_free(wps_ie);
1213                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1214                 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY))
1215                         params.wps = WPS_MODE_PRIVACY;
1216                 else
1217                         params.wps = WPS_MODE_OPEN;
1218 #endif /* CONFIG_WPS */
1219         } else {
1220                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1221                 wpa_ie_len = 0;
1222         }
1223
1224 #ifdef CONFIG_P2P
1225         if (wpa_s->global->p2p) {
1226                 u8 *pos;
1227                 size_t len;
1228                 int res;
1229                 int p2p_group;
1230                 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
1231                 pos = wpa_ie + wpa_ie_len;
1232                 len = sizeof(wpa_ie) - wpa_ie_len;
1233                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
1234                 if (res >= 0)
1235                         wpa_ie_len += res;
1236         }
1237
1238         wpa_s->cross_connect_disallowed = 0;
1239         if (bss) {
1240                 struct wpabuf *p2p;
1241                 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
1242                 if (p2p) {
1243                         wpa_s->cross_connect_disallowed =
1244                                 p2p_get_cross_connect_disallowed(p2p);
1245                         wpabuf_free(p2p);
1246                         wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross "
1247                                 "connection",
1248                                 wpa_s->cross_connect_disallowed ?
1249                                 "disallows" : "allows");
1250                 }
1251         }
1252 #endif /* CONFIG_P2P */
1253
1254         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1255         use_crypt = 1;
1256         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1257         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1258         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1259             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1260                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1261                         use_crypt = 0;
1262                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1263                         use_crypt = 1;
1264                         wep_keys_set = 1;
1265                 }
1266         }
1267         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1268                 use_crypt = 0;
1269
1270 #ifdef IEEE8021X_EAPOL
1271         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1272                 if ((ssid->eapol_flags &
1273                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1274                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1275                     !wep_keys_set) {
1276                         use_crypt = 0;
1277                 } else {
1278                         /* Assume that dynamic WEP-104 keys will be used and
1279                          * set cipher suites in order for drivers to expect
1280                          * encryption. */
1281                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1282                 }
1283         }
1284 #endif /* IEEE8021X_EAPOL */
1285
1286         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1287                 /* Set the key before (and later after) association */
1288                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1289         }
1290
1291         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1292         if (bss) {
1293                 params.bssid = bss->bssid;
1294                 params.ssid = bss->ssid;
1295                 params.ssid_len = bss->ssid_len;
1296                 params.freq = bss->freq;
1297         } else {
1298                 params.ssid = ssid->ssid;
1299                 params.ssid_len = ssid->ssid_len;
1300         }
1301         if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
1302             params.freq == 0)
1303                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1304         params.wpa_ie = wpa_ie;
1305         params.wpa_ie_len = wpa_ie_len;
1306         params.pairwise_suite = cipher_pairwise;
1307         params.group_suite = cipher_group;
1308         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1309         params.auth_alg = algs;
1310         params.mode = ssid->mode;
1311         for (i = 0; i < NUM_WEP_KEYS; i++) {
1312                 if (ssid->wep_key_len[i])
1313                         params.wep_key[i] = ssid->wep_key[i];
1314                 params.wep_key_len[i] = ssid->wep_key_len[i];
1315         }
1316         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1317
1318         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1319             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1320              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1321                 params.passphrase = ssid->passphrase;
1322                 if (ssid->psk_set)
1323                         params.psk = ssid->psk;
1324         }
1325
1326         params.drop_unencrypted = use_crypt;
1327
1328 #ifdef CONFIG_IEEE80211W
1329         params.mgmt_frame_protection = ssid->ieee80211w;
1330         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
1331                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1332                 struct wpa_ie_data ie;
1333                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1334                     ie.capabilities &
1335                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1336                         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports "
1337                                 "MFP: require MFP");
1338                         params.mgmt_frame_protection =
1339                                 MGMT_FRAME_PROTECTION_REQUIRED;
1340                 }
1341         }
1342 #endif /* CONFIG_IEEE80211W */
1343
1344 #ifdef CONFIG_P2P
1345         if (wpa_s->global->p2p &&
1346             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
1347                 params.p2p = 1;
1348 #endif /* CONFIG_P2P */
1349
1350         if (wpa_s->parent->set_sta_uapsd)
1351                 params.uapsd = wpa_s->parent->sta_uapsd;
1352         else
1353                 params.uapsd = -1;
1354
1355         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1356                 ret = ieee80211_sta_associate(wpa_s, &params);
1357         else
1358                 ret = wpa_drv_associate(wpa_s, &params);
1359         if (ret < 0) {
1360                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1361                         "failed");
1362                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) {
1363                         /*
1364                          * The driver is known to mean what is saying, so we
1365                          * can stop right here; the association will not
1366                          * succeed.
1367                          */
1368                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1369                         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1370                         return;
1371                 }
1372                 /* try to continue anyway; new association will be tried again
1373                  * after timeout */
1374                 assoc_failed = 1;
1375         }
1376
1377         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1378                 /* Set the key after the association just in case association
1379                  * cleared the previously configured key. */
1380                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1381                 /* No need to timeout authentication since there is no key
1382                  * management. */
1383                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1384                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1385 #ifdef CONFIG_IBSS_RSN
1386         } else if (ssid->mode == WPAS_MODE_IBSS &&
1387                    wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1388                    wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1389                 ibss_rsn_set_psk(wpa_s->ibss_rsn, ssid->psk);
1390                 /*
1391                  * RSN IBSS authentication is per-STA and we can disable the
1392                  * per-BSSID authentication.
1393                  */
1394                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1395 #endif /* CONFIG_IBSS_RSN */
1396         } else {
1397                 /* Timeout for IEEE 802.11 authentication and association */
1398                 int timeout = 60;
1399
1400                 if (assoc_failed) {
1401                         /* give IBSS a bit more time */
1402                         timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5;
1403                 } else if (wpa_s->conf->ap_scan == 1) {
1404                         /* give IBSS a bit more time */
1405                         timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10;
1406                 }
1407                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1408         }
1409
1410         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1411             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1412                 /* Set static WEP keys again */
1413                 wpa_set_wep_keys(wpa_s, ssid);
1414         }
1415
1416         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1417                 /*
1418                  * Do not allow EAP session resumption between different
1419                  * network configurations.
1420                  */
1421                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1422         }
1423         old_ssid = wpa_s->current_ssid;
1424         wpa_s->current_ssid = ssid;
1425         wpa_s->current_bss = bss;
1426         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1427         wpa_supplicant_initiate_eapol(wpa_s);
1428         if (old_ssid != wpa_s->current_ssid)
1429                 wpas_notify_network_changed(wpa_s);
1430 }
1431
1432
1433 static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s,
1434                                             const u8 *addr)
1435 {
1436         struct wpa_ssid *old_ssid;
1437
1438         wpa_clear_keys(wpa_s, addr);
1439         wpa_supplicant_mark_disassoc(wpa_s);
1440         old_ssid = wpa_s->current_ssid;
1441         wpa_s->current_ssid = NULL;
1442         wpa_s->current_bss = NULL;
1443         wpa_sm_set_config(wpa_s->wpa, NULL);
1444         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1445         if (old_ssid != wpa_s->current_ssid)
1446                 wpas_notify_network_changed(wpa_s);
1447         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
1448 }
1449
1450
1451 /**
1452  * wpa_supplicant_disassociate - Disassociate the current connection
1453  * @wpa_s: Pointer to wpa_supplicant data
1454  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1455  *
1456  * This function is used to request %wpa_supplicant to disassociate with the
1457  * current AP.
1458  */
1459 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1460                                  int reason_code)
1461 {
1462         u8 *addr = NULL;
1463
1464         if (!is_zero_ether_addr(wpa_s->bssid)) {
1465                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1466                         ieee80211_sta_disassociate(wpa_s, reason_code);
1467                 else
1468                         wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1469                 addr = wpa_s->bssid;
1470         }
1471
1472         wpa_supplicant_clear_connection(wpa_s, addr);
1473 }
1474
1475
1476 /**
1477  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1478  * @wpa_s: Pointer to wpa_supplicant data
1479  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1480  *
1481  * This function is used to request %wpa_supplicant to deauthenticate from the
1482  * current AP.
1483  */
1484 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1485                                    int reason_code)
1486 {
1487         u8 *addr = NULL;
1488
1489         if (!is_zero_ether_addr(wpa_s->bssid)) {
1490                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1491                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1492                 else
1493                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1494                                                reason_code);
1495                 addr = wpa_s->bssid;
1496         }
1497
1498         wpa_supplicant_clear_connection(wpa_s, addr);
1499 }
1500
1501
1502 /**
1503  * wpa_supplicant_enable_network - Mark a configured network as enabled
1504  * @wpa_s: wpa_supplicant structure for a network interface
1505  * @ssid: wpa_ssid structure for a configured network or %NULL
1506  *
1507  * Enables the specified network or all networks if no network specified.
1508  */
1509 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1510                                    struct wpa_ssid *ssid)
1511 {
1512         struct wpa_ssid *other_ssid;
1513         int was_disabled;
1514
1515         if (ssid == NULL) {
1516                 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1517                      other_ssid = other_ssid->next) {
1518                         if (other_ssid->disabled == 2)
1519                                 continue; /* do not change persistent P2P group
1520                                            * data */
1521                         if (other_ssid == wpa_s->current_ssid &&
1522                             other_ssid->disabled)
1523                                 wpa_s->reassociate = 1;
1524
1525                         was_disabled = other_ssid->disabled;
1526
1527                         other_ssid->disabled = 0;
1528
1529                         if (was_disabled != other_ssid->disabled)
1530                                 wpas_notify_network_enabled_changed(
1531                                         wpa_s, other_ssid);
1532                 }
1533                 if (wpa_s->reassociate)
1534                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1535         } else if (ssid->disabled && ssid->disabled != 2) {
1536                 if (wpa_s->current_ssid == NULL) {
1537                         /*
1538                          * Try to reassociate since there is no current
1539                          * configuration and a new network was made available.
1540                          */
1541                         wpa_s->reassociate = 1;
1542                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1543                 }
1544
1545                 was_disabled = ssid->disabled;
1546
1547                 ssid->disabled = 0;
1548
1549                 if (was_disabled != ssid->disabled)
1550                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1551         }
1552 }
1553
1554
1555 /**
1556  * wpa_supplicant_disable_network - Mark a configured network as disabled
1557  * @wpa_s: wpa_supplicant structure for a network interface
1558  * @ssid: wpa_ssid structure for a configured network or %NULL
1559  *
1560  * Disables the specified network or all networks if no network specified.
1561  */
1562 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1563                                     struct wpa_ssid *ssid)
1564 {
1565         struct wpa_ssid *other_ssid;
1566         int was_disabled;
1567
1568         if (ssid == NULL) {
1569                 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1570                      other_ssid = other_ssid->next) {
1571                         was_disabled = other_ssid->disabled;
1572                         if (was_disabled == 2)
1573                                 continue; /* do not change persistent P2P group
1574                                            * data */
1575
1576                         other_ssid->disabled = 1;
1577
1578                         if (was_disabled != other_ssid->disabled)
1579                                 wpas_notify_network_enabled_changed(
1580                                         wpa_s, other_ssid);
1581                 }
1582                 if (wpa_s->current_ssid)
1583                         wpa_supplicant_disassociate(
1584                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1585         } else if (ssid->disabled != 2) {
1586                 if (ssid == wpa_s->current_ssid)
1587                         wpa_supplicant_disassociate(
1588                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1589
1590                 was_disabled = ssid->disabled;
1591
1592                 ssid->disabled = 1;
1593
1594                 if (was_disabled != ssid->disabled)
1595                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1596         }
1597 }
1598
1599
1600 /**
1601  * wpa_supplicant_select_network - Attempt association with a network
1602  * @wpa_s: wpa_supplicant structure for a network interface
1603  * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1604  */
1605 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1606                                    struct wpa_ssid *ssid)
1607 {
1608
1609         struct wpa_ssid *other_ssid;
1610
1611         if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1612                 wpa_supplicant_disassociate(
1613                         wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1614
1615         /*
1616          * Mark all other networks disabled or mark all networks enabled if no
1617          * network specified.
1618          */
1619         for (other_ssid = wpa_s->conf->ssid; other_ssid;
1620              other_ssid = other_ssid->next) {
1621                 int was_disabled = other_ssid->disabled;
1622                 if (was_disabled == 2)
1623                         continue; /* do not change persistent P2P group data */
1624
1625                 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1626
1627                 if (was_disabled != other_ssid->disabled)
1628                         wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1629         }
1630         wpa_s->disconnected = 0;
1631         wpa_s->reassociate = 1;
1632         wpa_supplicant_req_scan(wpa_s, 0, 0);
1633
1634         if (ssid)
1635                 wpas_notify_network_selected(wpa_s, ssid);
1636 }
1637
1638
1639 /**
1640  * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1641  * @wpa_s: wpa_supplicant structure for a network interface
1642  * @ap_scan: AP scan mode
1643  * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1644  *
1645  */
1646 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1647 {
1648
1649         int old_ap_scan;
1650
1651         if (ap_scan < 0 || ap_scan > 2)
1652                 return -1;
1653
1654         old_ap_scan = wpa_s->conf->ap_scan;
1655         wpa_s->conf->ap_scan = ap_scan;
1656
1657         if (old_ap_scan != wpa_s->conf->ap_scan)
1658                 wpas_notify_ap_scan_changed(wpa_s);
1659
1660         return 0;
1661 }
1662
1663
1664 /**
1665  * wpa_supplicant_set_debug_params - Set global debug params
1666  * @global: wpa_global structure
1667  * @debug_level: debug level
1668  * @debug_timestamp: determines if show timestamp in debug data
1669  * @debug_show_keys: determines if show keys in debug data
1670  * Returns: 0 if succeed or -1 if debug_level has wrong value
1671  */
1672 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1673                                     int debug_timestamp, int debug_show_keys)
1674 {
1675
1676         int old_level, old_timestamp, old_show_keys;
1677
1678         /* check for allowed debuglevels */
1679         if (debug_level != MSG_MSGDUMP &&
1680             debug_level != MSG_DEBUG &&
1681             debug_level != MSG_INFO &&
1682             debug_level != MSG_WARNING &&
1683             debug_level != MSG_ERROR)
1684                 return -1;
1685
1686         old_level = wpa_debug_level;
1687         old_timestamp = wpa_debug_timestamp;
1688         old_show_keys = wpa_debug_show_keys;
1689
1690         wpa_debug_level = debug_level;
1691         wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1692         wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1693
1694         if (wpa_debug_level != old_level)
1695                 wpas_notify_debug_level_changed(global);
1696         if (wpa_debug_timestamp != old_timestamp)
1697                 wpas_notify_debug_timestamp_changed(global);
1698         if (wpa_debug_show_keys != old_show_keys)
1699                 wpas_notify_debug_show_keys_changed(global);
1700
1701         return 0;
1702 }
1703
1704
1705 /**
1706  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1707  * @wpa_s: Pointer to wpa_supplicant data
1708  * Returns: A pointer to the current network structure or %NULL on failure
1709  */
1710 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1711 {
1712         struct wpa_ssid *entry;
1713         u8 ssid[MAX_SSID_LEN];
1714         int res;
1715         size_t ssid_len;
1716         u8 bssid[ETH_ALEN];
1717         int wired;
1718
1719         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1720                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1721                         wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1722                                 "MLME");
1723                         return NULL;
1724                 }
1725         } else {
1726                 res = wpa_drv_get_ssid(wpa_s, ssid);
1727                 if (res < 0) {
1728                         wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1729                                 "driver");
1730                         return NULL;
1731                 }
1732                 ssid_len = res;
1733         }
1734
1735         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1736                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1737         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1738                 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from "
1739                         "driver");
1740                 return NULL;
1741         }
1742
1743         wired = wpa_s->conf->ap_scan == 0 &&
1744                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1745
1746         entry = wpa_s->conf->ssid;
1747         while (entry) {
1748                 if (!entry->disabled &&
1749                     ((ssid_len == entry->ssid_len &&
1750                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1751                     (!entry->bssid_set ||
1752                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1753                         return entry;
1754 #ifdef CONFIG_WPS
1755                 if (!entry->disabled &&
1756                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1757                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1758                     (!entry->bssid_set ||
1759                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1760                         return entry;
1761 #endif /* CONFIG_WPS */
1762                 entry = entry->next;
1763         }
1764
1765         return NULL;
1766 }
1767
1768
1769 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1770                                      const char *name)
1771 {
1772         int i;
1773         size_t len;
1774         const char *pos, *driver = name;
1775
1776         if (wpa_s == NULL)
1777                 return -1;
1778
1779         if (wpa_drivers[0] == NULL) {
1780                 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into "
1781                         "wpa_supplicant");
1782                 return -1;
1783         }
1784
1785         if (name == NULL) {
1786                 /* default to first driver in the list */
1787                 wpa_s->driver = wpa_drivers[0];
1788                 wpa_s->global_drv_priv = wpa_s->global->drv_priv[0];
1789                 return 0;
1790         }
1791
1792         do {
1793                 pos = os_strchr(driver, ',');
1794                 if (pos)
1795                         len = pos - driver;
1796                 else
1797                         len = os_strlen(driver);
1798
1799                 for (i = 0; wpa_drivers[i]; i++) {
1800                         if (os_strlen(wpa_drivers[i]->name) == len &&
1801                             os_strncmp(driver, wpa_drivers[i]->name, len) ==
1802                             0) {
1803                                 wpa_s->driver = wpa_drivers[i];
1804                                 wpa_s->global_drv_priv =
1805                                         wpa_s->global->drv_priv[i];
1806                                 return 0;
1807                         }
1808                 }
1809
1810                 driver = pos + 1;
1811         } while (pos);
1812
1813         wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name);
1814         return -1;
1815 }
1816
1817
1818 /**
1819  * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1820  * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1821  *      with struct wpa_driver_ops::init()
1822  * @src_addr: Source address of the EAPOL frame
1823  * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1824  * @len: Length of the EAPOL data
1825  *
1826  * This function is called for each received EAPOL frame. Most driver
1827  * interfaces rely on more generic OS mechanism for receiving frames through
1828  * l2_packet, but if such a mechanism is not available, the driver wrapper may
1829  * take care of received EAPOL frames and deliver them to the core supplicant
1830  * code by calling this function.
1831  */
1832 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1833                              const u8 *buf, size_t len)
1834 {
1835         struct wpa_supplicant *wpa_s = ctx;
1836
1837         wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1838         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1839
1840         if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1841                 /*
1842                  * There is possible race condition between receiving the
1843                  * association event and the EAPOL frame since they are coming
1844                  * through different paths from the driver. In order to avoid
1845                  * issues in trying to process the EAPOL frame before receiving
1846                  * association information, lets queue it for processing until
1847                  * the association event is received.
1848                  */
1849                 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing "
1850                         "of received EAPOL frame");
1851                 wpabuf_free(wpa_s->pending_eapol_rx);
1852                 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1853                 if (wpa_s->pending_eapol_rx) {
1854                         os_get_time(&wpa_s->pending_eapol_rx_time);
1855                         os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1856                                   ETH_ALEN);
1857                 }
1858                 return;
1859         }
1860
1861 #ifdef CONFIG_AP
1862         if (wpa_s->ap_iface) {
1863                 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
1864                 return;
1865         }
1866 #endif /* CONFIG_AP */
1867
1868         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1869                 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since "
1870                         "no key management is configured");
1871                 return;
1872         }
1873
1874         if (wpa_s->eapol_received == 0 &&
1875             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1876              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1877              wpa_s->wpa_state != WPA_COMPLETED) &&
1878             (wpa_s->current_ssid == NULL ||
1879              wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) {
1880                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1881                 wpa_supplicant_req_auth_timeout(
1882                         wpa_s,
1883                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1884                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1885                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1886                         70 : 10, 0);
1887         }
1888         wpa_s->eapol_received++;
1889
1890         if (wpa_s->countermeasures) {
1891                 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped "
1892                         "EAPOL packet");
1893                 return;
1894         }
1895
1896 #ifdef CONFIG_IBSS_RSN
1897         if (wpa_s->current_ssid &&
1898             wpa_s->current_ssid->mode == WPAS_MODE_IBSS) {
1899                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1900                 return;
1901         }
1902 #endif /* CONFIG_IBSS_RSN */
1903
1904         /* Source address of the incoming EAPOL frame could be compared to the
1905          * current BSSID. However, it is possible that a centralized
1906          * Authenticator could be using another MAC address than the BSSID of
1907          * an AP, so just allow any address to be used for now. The replies are
1908          * still sent to the current BSSID (if available), though. */
1909
1910         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1911         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1912             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1913                 return;
1914         wpa_drv_poll(wpa_s);
1915         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1916                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1917         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1918                 /*
1919                  * Set portValid = TRUE here since we are going to skip 4-way
1920                  * handshake processing which would normally set portValid. We
1921                  * need this to allow the EAPOL state machines to be completed
1922                  * without going through EAPOL-Key handshake.
1923                  */
1924                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1925         }
1926 }
1927
1928
1929 /**
1930  * wpa_supplicant_driver_init - Initialize driver interface parameters
1931  * @wpa_s: Pointer to wpa_supplicant data
1932  * Returns: 0 on success, -1 on failure
1933  *
1934  * This function is called to initialize driver interface parameters.
1935  * wpa_drv_init() must have been called before this function to initialize the
1936  * driver interface.
1937  */
1938 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1939 {
1940         static int interface_count = 0;
1941
1942         if (wpa_s->driver->send_eapol) {
1943                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1944                 if (addr)
1945                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1946         } else if (!(wpa_s->drv_flags &
1947                      WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) {
1948                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1949                                            wpa_drv_get_mac_addr(wpa_s),
1950                                            ETH_P_EAPOL,
1951                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1952                 if (wpa_s->l2 == NULL)
1953                         return -1;
1954         } else {
1955                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1956                 if (addr)
1957                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1958         }
1959
1960         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1961                 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address");
1962                 return -1;
1963         }
1964
1965         wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR,
1966                 MAC2STR(wpa_s->own_addr));
1967
1968         if (wpa_s->bridge_ifname[0]) {
1969                 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge "
1970                         "interface '%s'", wpa_s->bridge_ifname);
1971                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1972                                               wpa_s->own_addr,
1973                                               ETH_P_EAPOL,
1974                                               wpa_supplicant_rx_eapol, wpa_s,
1975                                               0);
1976                 if (wpa_s->l2_br == NULL) {
1977                         wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet "
1978                                 "connection for the bridge interface '%s'",
1979                                 wpa_s->bridge_ifname);
1980                         return -1;
1981                 }
1982         }
1983
1984         wpa_clear_keys(wpa_s, NULL);
1985
1986         /* Make sure that TKIP countermeasures are not left enabled (could
1987          * happen if wpa_supplicant is killed during countermeasures. */
1988         wpa_drv_set_countermeasures(wpa_s, 0);
1989
1990         wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1991         wpa_drv_flush_pmkid(wpa_s);
1992
1993         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1994         if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
1995                 wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1996                 interface_count++;
1997         } else
1998                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
1999
2000         return 0;
2001 }
2002
2003
2004 static int wpa_supplicant_daemon(const char *pid_file)
2005 {
2006         wpa_printf(MSG_DEBUG, "Daemonize..");
2007         return os_daemonize(pid_file);
2008 }
2009
2010
2011 static struct wpa_supplicant * wpa_supplicant_alloc(void)
2012 {
2013         struct wpa_supplicant *wpa_s;
2014
2015         wpa_s = os_zalloc(sizeof(*wpa_s));
2016         if (wpa_s == NULL)
2017                 return NULL;
2018         wpa_s->scan_req = 1;
2019         wpa_s->new_connection = 1;
2020         wpa_s->parent = wpa_s;
2021
2022         return wpa_s;
2023 }
2024
2025
2026 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
2027                                      struct wpa_interface *iface)
2028 {
2029         const char *ifname, *driver;
2030         struct wpa_driver_capa capa;
2031
2032         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
2033                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
2034                    iface->confname ? iface->confname : "N/A",
2035                    iface->driver ? iface->driver : "default",
2036                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
2037                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
2038
2039         if (iface->confname) {
2040 #ifdef CONFIG_BACKEND_FILE
2041                 wpa_s->confname = os_rel2abs_path(iface->confname);
2042                 if (wpa_s->confname == NULL) {
2043                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
2044                                    "for configuration file '%s'.",
2045                                    iface->confname);
2046                         return -1;
2047                 }
2048                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
2049                            iface->confname, wpa_s->confname);
2050 #else /* CONFIG_BACKEND_FILE */
2051                 wpa_s->confname = os_strdup(iface->confname);
2052 #endif /* CONFIG_BACKEND_FILE */
2053                 wpa_s->conf = wpa_config_read(wpa_s->confname);
2054                 if (wpa_s->conf == NULL) {
2055                         wpa_printf(MSG_ERROR, "Failed to read or parse "
2056                                    "configuration '%s'.", wpa_s->confname);
2057                         return -1;
2058                 }
2059
2060                 /*
2061                  * Override ctrl_interface and driver_param if set on command
2062                  * line.
2063                  */
2064                 if (iface->ctrl_interface) {
2065                         os_free(wpa_s->conf->ctrl_interface);
2066                         wpa_s->conf->ctrl_interface =
2067                                 os_strdup(iface->ctrl_interface);
2068                 }
2069
2070                 if (iface->driver_param) {
2071                         os_free(wpa_s->conf->driver_param);
2072                         wpa_s->conf->driver_param =
2073                                 os_strdup(iface->driver_param);
2074                 }
2075         } else
2076                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
2077                                                      iface->driver_param);
2078
2079         if (wpa_s->conf == NULL) {
2080                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
2081                 return -1;
2082         }
2083
2084         if (iface->ifname == NULL) {
2085                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
2086                 return -1;
2087         }
2088         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
2089                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
2090                            iface->ifname);
2091                 return -1;
2092         }
2093         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
2094
2095         if (iface->bridge_ifname) {
2096                 if (os_strlen(iface->bridge_ifname) >=
2097                     sizeof(wpa_s->bridge_ifname)) {
2098                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
2099                                    "name '%s'.", iface->bridge_ifname);
2100                         return -1;
2101                 }
2102                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
2103                            sizeof(wpa_s->bridge_ifname));
2104         }
2105
2106         /* RSNA Supplicant Key Management - INITIALIZE */
2107         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2108         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2109
2110         /* Initialize driver interface and register driver event handler before
2111          * L2 receive handler so that association events are processed before
2112          * EAPOL-Key packets if both become available for the same select()
2113          * call. */
2114         driver = iface->driver;
2115 next_driver:
2116         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2117                 return -1;
2118
2119         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2120         if (wpa_s->drv_priv == NULL) {
2121                 const char *pos;
2122                 pos = driver ? os_strchr(driver, ',') : NULL;
2123                 if (pos) {
2124                         wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
2125                                 "driver interface - try next driver wrapper");
2126                         driver = pos + 1;
2127                         goto next_driver;
2128                 }
2129                 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver "
2130                         "interface");
2131                 return -1;
2132         }
2133         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2134                 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected "
2135                         "driver_param '%s'", wpa_s->conf->driver_param);
2136                 return -1;
2137         }
2138
2139         ifname = wpa_drv_get_ifname(wpa_s);
2140         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2141                 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced "
2142                         "interface name with '%s'", ifname);
2143                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2144         }
2145
2146         if (wpa_supplicant_init_wpa(wpa_s) < 0)
2147                 return -1;
2148
2149         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2150                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2151                           NULL);
2152         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2153
2154         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2155             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2156                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2157                 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2158                         "dot11RSNAConfigPMKLifetime");
2159                 return -1;
2160         }
2161
2162         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2163             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2164                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2165                 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2166                         "dot11RSNAConfigPMKReauthThreshold");
2167                 return -1;
2168         }
2169
2170         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2171             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2172                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
2173                 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2174                         "dot11RSNAConfigSATimeout");
2175                 return -1;
2176         }
2177
2178         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2179                 wpa_s->drv_flags = capa.flags;
2180                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
2181                         if (ieee80211_sta_init(wpa_s))
2182                                 return -1;
2183                 }
2184                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2185                 wpa_s->max_remain_on_chan = capa.max_remain_on_chan;
2186                 wpa_s->max_stations = capa.max_stations;
2187         }
2188         if (wpa_s->max_remain_on_chan == 0)
2189                 wpa_s->max_remain_on_chan = 1000;
2190
2191         if (wpa_supplicant_driver_init(wpa_s) < 0)
2192                 return -1;
2193
2194 #ifdef CONFIG_TDLS
2195         if (wpa_tdls_init(wpa_s->wpa))
2196                 return -1;
2197 #endif /* CONFIG_TDLS */
2198
2199         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2200             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2201                 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country");
2202                 return -1;
2203         }
2204
2205         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2206
2207         if (wpas_wps_init(wpa_s))
2208                 return -1;
2209
2210         if (wpa_supplicant_init_eapol(wpa_s) < 0)
2211                 return -1;
2212         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2213
2214         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2215         if (wpa_s->ctrl_iface == NULL) {
2216                 wpa_printf(MSG_ERROR,
2217                            "Failed to initialize control interface '%s'.\n"
2218                            "You may have another wpa_supplicant process "
2219                            "already running or the file was\n"
2220                            "left by an unclean termination of wpa_supplicant "
2221                            "in which case you will need\n"
2222                            "to manually remove this file before starting "
2223                            "wpa_supplicant again.\n",
2224                            wpa_s->conf->ctrl_interface);
2225                 return -1;
2226         }
2227
2228 #ifdef CONFIG_IBSS_RSN
2229         wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
2230         if (!wpa_s->ibss_rsn) {
2231                 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to init IBSS RSN");
2232                 return -1;
2233         }
2234 #endif /* CONFIG_IBSS_RSN */
2235
2236 #ifdef CONFIG_P2P
2237         if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) {
2238                 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P");
2239                 return -1;
2240         }
2241 #endif /* CONFIG_P2P */
2242
2243         if (wpa_bss_init(wpa_s) < 0)
2244                 return -1;
2245
2246         return 0;
2247 }
2248
2249
2250 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
2251                                         int notify)
2252 {
2253         if (wpa_s->drv_priv) {
2254                 wpa_supplicant_deauthenticate(wpa_s,
2255                                               WLAN_REASON_DEAUTH_LEAVING);
2256
2257                 wpa_drv_set_countermeasures(wpa_s, 0);
2258                 wpa_clear_keys(wpa_s, NULL);
2259         }
2260
2261         wpa_supplicant_cleanup(wpa_s);
2262
2263         if (notify)
2264                 wpas_notify_iface_removed(wpa_s);
2265
2266         if (wpa_s->drv_priv)
2267                 wpa_drv_deinit(wpa_s);
2268 }
2269
2270
2271 /**
2272  * wpa_supplicant_add_iface - Add a new network interface
2273  * @global: Pointer to global data from wpa_supplicant_init()
2274  * @iface: Interface configuration options
2275  * Returns: Pointer to the created interface or %NULL on failure
2276  *
2277  * This function is used to add new network interfaces for %wpa_supplicant.
2278  * This can be called before wpa_supplicant_run() to add interfaces before the
2279  * main event loop has been started. In addition, new interfaces can be added
2280  * dynamically while %wpa_supplicant is already running. This could happen,
2281  * e.g., when a hotplug network adapter is inserted.
2282  */
2283 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2284                                                  struct wpa_interface *iface)
2285 {
2286         struct wpa_supplicant *wpa_s;
2287         struct wpa_interface t_iface;
2288         struct wpa_ssid *ssid;
2289
2290         if (global == NULL || iface == NULL)
2291                 return NULL;
2292
2293         wpa_s = wpa_supplicant_alloc();
2294         if (wpa_s == NULL)
2295                 return NULL;
2296
2297         wpa_s->global = global;
2298
2299         t_iface = *iface;
2300         if (global->params.override_driver) {
2301                 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2302                            "('%s' -> '%s')",
2303                            iface->driver, global->params.override_driver);
2304                 t_iface.driver = global->params.override_driver;
2305         }
2306         if (global->params.override_ctrl_interface) {
2307                 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2308                            "ctrl_interface ('%s' -> '%s')",
2309                            iface->ctrl_interface,
2310                            global->params.override_ctrl_interface);
2311                 t_iface.ctrl_interface =
2312                         global->params.override_ctrl_interface;
2313         }
2314         if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2315                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2316                            iface->ifname);
2317                 wpa_supplicant_deinit_iface(wpa_s, 0);
2318                 os_free(wpa_s);
2319                 return NULL;
2320         }
2321
2322         /* Notify the control interfaces about new iface */
2323         if (wpas_notify_iface_added(wpa_s)) {
2324                 wpa_supplicant_deinit_iface(wpa_s, 1);
2325                 os_free(wpa_s);
2326                 return NULL;
2327         }
2328
2329         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
2330                 wpas_notify_network_added(wpa_s, ssid);
2331
2332         wpa_s->next = global->ifaces;
2333         global->ifaces = wpa_s;
2334
2335         wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2336
2337         return wpa_s;
2338 }
2339
2340
2341 /**
2342  * wpa_supplicant_remove_iface - Remove a network interface
2343  * @global: Pointer to global data from wpa_supplicant_init()
2344  * @wpa_s: Pointer to the network interface to be removed
2345  * Returns: 0 if interface was removed, -1 if interface was not found
2346  *
2347  * This function can be used to dynamically remove network interfaces from
2348  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2349  * addition, this function is used to remove all remaining interfaces when
2350  * %wpa_supplicant is terminated.
2351  */
2352 int wpa_supplicant_remove_iface(struct wpa_global *global,
2353                                 struct wpa_supplicant *wpa_s)
2354 {
2355         struct wpa_supplicant *prev;
2356
2357         /* Remove interface from the global list of interfaces */
2358         prev = global->ifaces;
2359         if (prev == wpa_s) {
2360                 global->ifaces = wpa_s->next;
2361         } else {
2362                 while (prev && prev->next != wpa_s)
2363                         prev = prev->next;
2364                 if (prev == NULL)
2365                         return -1;
2366                 prev->next = wpa_s->next;
2367         }
2368
2369         wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2370
2371         if (global->p2p_group_formation == wpa_s)
2372                 global->p2p_group_formation = NULL;
2373         wpa_supplicant_deinit_iface(wpa_s, 1);
2374         os_free(wpa_s);
2375
2376         return 0;
2377 }
2378
2379
2380 /**
2381  * wpa_supplicant_get_eap_mode - Get the current EAP mode
2382  * @wpa_s: Pointer to the network interface
2383  * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found
2384  */
2385 const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s)
2386 {
2387         const char *eapol_method;
2388
2389         if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 &&
2390             wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
2391                 return "NO-EAP";
2392         }
2393
2394         eapol_method = eapol_sm_get_method_name(wpa_s->eapol);
2395         if (eapol_method == NULL)
2396                 return "UNKNOWN-EAP";
2397
2398         return eapol_method;
2399 }
2400
2401
2402 /**
2403  * wpa_supplicant_get_iface - Get a new network interface
2404  * @global: Pointer to global data from wpa_supplicant_init()
2405  * @ifname: Interface name
2406  * Returns: Pointer to the interface or %NULL if not found
2407  */
2408 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2409                                                  const char *ifname)
2410 {
2411         struct wpa_supplicant *wpa_s;
2412
2413         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2414                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2415                         return wpa_s;
2416         }
2417         return NULL;
2418 }
2419
2420
2421 #ifndef CONFIG_NO_WPA_MSG
2422 static const char * wpa_supplicant_msg_ifname_cb(void *ctx)
2423 {
2424         struct wpa_supplicant *wpa_s = ctx;
2425         if (wpa_s == NULL)
2426                 return NULL;
2427         return wpa_s->ifname;
2428 }
2429 #endif /* CONFIG_NO_WPA_MSG */
2430
2431
2432 /**
2433  * wpa_supplicant_init - Initialize %wpa_supplicant
2434  * @params: Parameters for %wpa_supplicant
2435  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2436  *
2437  * This function is used to initialize %wpa_supplicant. After successful
2438  * initialization, the returned data pointer can be used to add and remove
2439  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2440  */
2441 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2442 {
2443         struct wpa_global *global;
2444         int ret, i;
2445
2446         if (params == NULL)
2447                 return NULL;
2448
2449 #ifndef CONFIG_NO_WPA_MSG
2450         wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb);
2451 #endif /* CONFIG_NO_WPA_MSG */
2452
2453         wpa_debug_open_file(params->wpa_debug_file_path);
2454         if (params->wpa_debug_syslog)
2455                 wpa_debug_open_syslog();
2456
2457         ret = eap_register_methods();
2458         if (ret) {
2459                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2460                 if (ret == -2)
2461                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2462                                    "the same EAP type.");
2463                 return NULL;
2464         }
2465
2466         global = os_zalloc(sizeof(*global));
2467         if (global == NULL)
2468                 return NULL;
2469         dl_list_init(&global->p2p_srv_bonjour);
2470         dl_list_init(&global->p2p_srv_upnp);
2471         global->params.daemonize = params->daemonize;
2472         global->params.wait_for_monitor = params->wait_for_monitor;
2473         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2474         if (params->pid_file)
2475                 global->params.pid_file = os_strdup(params->pid_file);
2476         if (params->ctrl_interface)
2477                 global->params.ctrl_interface =
2478                         os_strdup(params->ctrl_interface);
2479         if (params->override_driver)
2480                 global->params.override_driver =
2481                         os_strdup(params->override_driver);
2482         if (params->override_ctrl_interface)
2483                 global->params.override_ctrl_interface =
2484                         os_strdup(params->override_ctrl_interface);
2485         wpa_debug_level = global->params.wpa_debug_level =
2486                 params->wpa_debug_level;
2487         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2488                 params->wpa_debug_show_keys;
2489         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2490                 params->wpa_debug_timestamp;
2491
2492         wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR);
2493
2494         if (eloop_init()) {
2495                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2496                 wpa_supplicant_deinit(global);
2497                 return NULL;
2498         }
2499
2500         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2501         if (global->ctrl_iface == NULL) {
2502                 wpa_supplicant_deinit(global);
2503                 return NULL;
2504         }
2505
2506         if (wpas_notify_supplicant_initialized(global)) {
2507                 wpa_supplicant_deinit(global);
2508                 return NULL;
2509         }
2510
2511         for (i = 0; wpa_drivers[i]; i++)
2512                 global->drv_count++;
2513         if (global->drv_count == 0) {
2514                 wpa_printf(MSG_ERROR, "No drivers enabled");
2515                 wpa_supplicant_deinit(global);
2516                 return NULL;
2517         }
2518         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2519         if (global->drv_priv == NULL) {
2520                 wpa_supplicant_deinit(global);
2521                 return NULL;
2522         }
2523         for (i = 0; wpa_drivers[i]; i++) {
2524                 if (!wpa_drivers[i]->global_init)
2525                         continue;
2526                 global->drv_priv[i] = wpa_drivers[i]->global_init();
2527                 if (global->drv_priv[i] == NULL) {
2528                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
2529                                    "'%s'", wpa_drivers[i]->name);
2530                         wpa_supplicant_deinit(global);
2531                         return NULL;
2532                 }
2533         }
2534
2535         return global;
2536 }
2537
2538
2539 /**
2540  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2541  * @global: Pointer to global data from wpa_supplicant_init()
2542  * Returns: 0 after successful event loop run, -1 on failure
2543  *
2544  * This function starts the main event loop and continues running as long as
2545  * there are any remaining events. In most cases, this function is running as
2546  * long as the %wpa_supplicant process in still in use.
2547  */
2548 int wpa_supplicant_run(struct wpa_global *global)
2549 {
2550         struct wpa_supplicant *wpa_s;
2551
2552         if (global->params.daemonize &&
2553             wpa_supplicant_daemon(global->params.pid_file))
2554                 return -1;
2555
2556         if (global->params.wait_for_monitor) {
2557                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2558                         if (wpa_s->ctrl_iface)
2559                                 wpa_supplicant_ctrl_iface_wait(
2560                                         wpa_s->ctrl_iface);
2561         }
2562
2563         eloop_register_signal_terminate(wpa_supplicant_terminate, global);
2564         eloop_register_signal_reconfig(wpa_supplicant_reconfig, global);
2565
2566         eloop_run();
2567
2568         return 0;
2569 }
2570
2571
2572 /**
2573  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2574  * @global: Pointer to global data from wpa_supplicant_init()
2575  *
2576  * This function is called to deinitialize %wpa_supplicant and to free all
2577  * allocated resources. Remaining network interfaces will also be removed.
2578  */
2579 void wpa_supplicant_deinit(struct wpa_global *global)
2580 {
2581         int i;
2582
2583         if (global == NULL)
2584                 return;
2585
2586 #ifdef CONFIG_P2P
2587         wpas_p2p_deinit_global(global);
2588 #endif /* CONFIG_P2P */
2589
2590         while (global->ifaces)
2591                 wpa_supplicant_remove_iface(global, global->ifaces);
2592
2593         if (global->ctrl_iface)
2594                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2595
2596         wpas_notify_supplicant_deinitialized(global);
2597
2598         eap_peer_unregister_methods();
2599 #ifdef CONFIG_AP
2600         eap_server_unregister_methods();
2601 #endif /* CONFIG_AP */
2602
2603         for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2604                 if (!global->drv_priv[i])
2605                         continue;
2606                 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2607         }
2608         os_free(global->drv_priv);
2609
2610         eloop_destroy();
2611
2612         if (global->params.pid_file) {
2613                 os_daemonize_terminate(global->params.pid_file);
2614                 os_free(global->params.pid_file);
2615         }
2616         os_free(global->params.ctrl_interface);
2617         os_free(global->params.override_driver);
2618         os_free(global->params.override_ctrl_interface);
2619
2620         os_free(global);
2621         wpa_debug_close_syslog();
2622         wpa_debug_close_file();
2623 }
2624
2625
2626 void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s)
2627 {
2628 #ifdef CONFIG_WPS
2629         wpas_wps_update_config(wpa_s);
2630 #endif /* CONFIG_WPS */
2631
2632 #ifdef CONFIG_P2P
2633         wpas_p2p_update_config(wpa_s);
2634 #endif /* CONFIG_P2P */
2635
2636         wpa_s->conf->changed_parameters = 0;
2637 }
2638
2639
2640 void ieee80211_sta_free_hw_features(struct hostapd_hw_modes *hw_features,
2641                                     size_t num_hw_features)
2642 {
2643         size_t i;
2644
2645         if (hw_features == NULL)
2646                 return;
2647
2648         for (i = 0; i < num_hw_features; i++) {
2649                 os_free(hw_features[i].channels);
2650                 os_free(hw_features[i].rates);
2651         }
2652
2653         os_free(hw_features);
2654 }
2655
2656
2657 static void add_freq(int *freqs, int *num_freqs, int freq)
2658 {
2659         int i;
2660
2661         for (i = 0; i < *num_freqs; i++) {
2662                 if (freqs[i] == freq)
2663                         return;
2664         }
2665
2666         freqs[*num_freqs] = freq;
2667         (*num_freqs)++;
2668 }
2669
2670
2671 static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s)
2672 {
2673         struct wpa_bss *bss, *cbss;
2674         const int max_freqs = 10;
2675         int *freqs;
2676         int num_freqs = 0;
2677
2678         freqs = os_zalloc(sizeof(int) * (max_freqs + 1));
2679         if (freqs == NULL)
2680                 return NULL;
2681
2682         cbss = wpa_s->current_bss;
2683
2684         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
2685                 if (bss == cbss)
2686                         continue;
2687                 if (bss->ssid_len == cbss->ssid_len &&
2688                     os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 &&
2689                     wpa_blacklist_get(wpa_s, bss->bssid) == NULL) {
2690                         add_freq(freqs, &num_freqs, bss->freq);
2691                         if (num_freqs == max_freqs)
2692                                 break;
2693                 }
2694         }
2695
2696         if (num_freqs == 0) {
2697                 os_free(freqs);
2698                 freqs = NULL;
2699         }
2700
2701         return freqs;
2702 }
2703
2704
2705 void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid)
2706 {
2707         int timeout;
2708         int count;
2709         int *freqs = NULL;
2710
2711         /*
2712          * Add the failed BSSID into the blacklist and speed up next scan
2713          * attempt if there could be other APs that could accept association.
2714          * The current blacklist count indicates how many times we have tried
2715          * connecting to this AP and multiple attempts mean that other APs are
2716          * either not available or has already been tried, so that we can start
2717          * increasing the delay here to avoid constant scanning.
2718          */
2719         count = wpa_blacklist_add(wpa_s, bssid);
2720         if (count == 1 && wpa_s->current_bss) {
2721                 /*
2722                  * This BSS was not in the blacklist before. If there is
2723                  * another BSS available for the same ESS, we should try that
2724                  * next. Otherwise, we may as well try this one once more
2725                  * before allowing other, likely worse, ESSes to be considered.
2726                  */
2727                 freqs = get_bss_freqs_in_ess(wpa_s);
2728                 if (freqs) {
2729                         wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS "
2730                                 "has been seen; try it next");
2731                         wpa_blacklist_add(wpa_s, bssid);
2732                         /*
2733                          * On the next scan, go through only the known channels
2734                          * used in this ESS based on previous scans to speed up
2735                          * common load balancing use case.
2736                          */
2737                         os_free(wpa_s->next_scan_freqs);
2738                         wpa_s->next_scan_freqs = freqs;
2739                 }
2740         }
2741
2742         switch (count) {
2743         case 1:
2744                 timeout = 100;
2745                 break;
2746         case 2:
2747                 timeout = 500;
2748                 break;
2749         case 3:
2750                 timeout = 1000;
2751                 break;
2752         default:
2753                 timeout = 5000;
2754         }
2755
2756         /*
2757          * TODO: if more than one possible AP is available in scan results,
2758          * could try the other ones before requesting a new scan.
2759          */
2760         wpa_supplicant_req_scan(wpa_s, timeout / 1000,
2761                                 1000 * (timeout % 1000));
2762 }