wpa_supplicant/wpa_supplicant.c

   1 /*
   2  * WPA Supplicant
   3  * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements functions for registering and unregistering
  15  * %wpa_supplicant interfaces. In addition, this file contains number of
  16  * functions for managing network connections.
  17  */
  18
  19 #include "includes.h"
  20
  21 #include "common.h"
  22 #include "eapol_supp/eapol_supp_sm.h"
  23 #include "eap_peer/eap.h"
  24 #include "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 "blacklist.h"
  40 #include "wpas_glue.h"
  41 #include "wps_supplicant.h"
  42 #include "ibss_rsn.h"
  43 #include "sme.h"
  44 #include "ap.h"
  45 #include "notify.h"
  46 #include "bgscan.h"
  47
  48 const char *wpa_supplicant_version =
  49 "wpa_supplicant v" VERSION_STR "\n"
  50 "Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi> and contributors";
  51
  52 const char *wpa_supplicant_license =
  53 "This program is free software. You can distribute it and/or modify it\n"
  54 "under the terms of the GNU General Public License version 2.\n"
  55 "\n"
  56 "Alternatively, this software may be distributed under the terms of the\n"
  57 "BSD license. See README and COPYING for more details.\n"
  58 #ifdef EAP_TLS_OPENSSL
  59 "\nThis product includes software developed by the OpenSSL Project\n"
  60 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
  61 #endif /* EAP_TLS_OPENSSL */
  62 ;
  63
  64 #ifndef CONFIG_NO_STDOUT_DEBUG
  65 /* Long text divided into parts in order to fit in C89 strings size limits. */
  66 const char *wpa_supplicant_full_license1 =
  67 "This program is free software; you can redistribute it and/or modify\n"
  68 "it under the terms of the GNU General Public License version 2 as\n"
  69 "published by the Free Software Foundation.\n"
  70 "\n"
  71 "This program is distributed in the hope that it will be useful,\n"
  72 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  73 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  74 "GNU General Public License for more details.\n"
  75 "\n";
  76 const char *wpa_supplicant_full_license2 =
  77 "You should have received a copy of the GNU General Public License\n"
  78 "along with this program; if not, write to the Free Software\n"
  79 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA\n"
  80 "\n"
  81 "Alternatively, this software may be distributed under the terms of the\n"
  82 "BSD license.\n"
  83 "\n"
  84 "Redistribution and use in source and binary forms, with or without\n"
  85 "modification, are permitted provided that the following conditions are\n"
  86 "met:\n"
  87 "\n";
  88 const char *wpa_supplicant_full_license3 =
  89 "1. Redistributions of source code must retain the above copyright\n"
  90 "   notice, this list of conditions and the following disclaimer.\n"
  91 "\n"
  92 "2. Redistributions in binary form must reproduce the above copyright\n"
  93 "   notice, this list of conditions and the following disclaimer in the\n"
  94 "   documentation and/or other materials provided with the distribution.\n"
  95 "\n";
  96 const char *wpa_supplicant_full_license4 =
  97 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
  98 "   names of its contributors may be used to endorse or promote products\n"
  99 "   derived from this software without specific prior written permission.\n"
 100 "\n"
 101 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
 102 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
 103 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
 104 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
 105 const char *wpa_supplicant_full_license5 =
 106 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
 107 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
 108 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
 109 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
 110 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
 111 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
 112 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
 113 "\n";
 114 #endif /* CONFIG_NO_STDOUT_DEBUG */
 115
 116 extern int wpa_debug_level;
 117 extern int wpa_debug_show_keys;
 118 extern int wpa_debug_timestamp;
 119 extern struct wpa_driver_ops *wpa_drivers[];
 120
 121 /* Configure default/group WEP keys for static WEP */
 122 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 123 {
 124         int i, set = 0;
 125
 126         for (i = 0; i < NUM_WEP_KEYS; i++) {
 127                 if (ssid->wep_key_len[i] == 0)
 128                         continue;
 129
 130                 set = 1;
 131                 wpa_drv_set_key(wpa_s, WPA_ALG_WEP,
 132                                 (u8 *) "\xff\xff\xff\xff\xff\xff",
 133                                 i, i == ssid->wep_tx_keyidx, (u8 *) "", 0,
 134                                 ssid->wep_key[i], ssid->wep_key_len[i]);
 135         }
 136
 137         return set;
 138 }
 139
 140
 141 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
 142                                            struct wpa_ssid *ssid)
 143 {
 144         u8 key[32];
 145         size_t keylen;
 146         wpa_alg alg;
 147         u8 seq[6] = { 0 };
 148
 149         /* IBSS/WPA-None uses only one key (Group) for both receiving and
 150          * sending unicast and multicast packets. */
 151
 152         if (ssid->mode != IEEE80211_MODE_IBSS) {
 153                 wpa_printf(MSG_INFO, "WPA: Invalid mode %d (not IBSS/ad-hoc) "
 154                            "for WPA-None", ssid->mode);
 155                 return -1;
 156         }
 157
 158         if (!ssid->psk_set) {
 159                 wpa_printf(MSG_INFO, "WPA: No PSK configured for WPA-None");
 160                 return -1;
 161         }
 162
 163         switch (wpa_s->group_cipher) {
 164         case WPA_CIPHER_CCMP:
 165                 os_memcpy(key, ssid->psk, 16);
 166                 keylen = 16;
 167                 alg = WPA_ALG_CCMP;
 168                 break;
 169         case WPA_CIPHER_TKIP:
 170                 /* WPA-None uses the same Michael MIC key for both TX and RX */
 171                 os_memcpy(key, ssid->psk, 16 + 8);
 172                 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
 173                 keylen = 32;
 174                 alg = WPA_ALG_TKIP;
 175                 break;
 176         default:
 177                 wpa_printf(MSG_INFO, "WPA: Invalid group cipher %d for "
 178                            "WPA-None", wpa_s->group_cipher);
 179                 return -1;
 180         }
 181
 182         /* TODO: should actually remember the previously used seq#, both for TX
 183          * and RX from each STA.. */
 184
 185         return wpa_drv_set_key(wpa_s, alg, (u8 *) "\xff\xff\xff\xff\xff\xff",
 186                                0, 1, seq, 6, key, keylen);
 187 }
 188
 189
 190 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
 191 {
 192         struct wpa_supplicant *wpa_s = eloop_ctx;
 193         const u8 *bssid = wpa_s->bssid;
 194         if (is_zero_ether_addr(bssid))
 195                 bssid = wpa_s->pending_bssid;
 196         wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
 197                 MAC2STR(bssid));
 198         wpa_blacklist_add(wpa_s, bssid);
 199         wpa_sm_notify_disassoc(wpa_s->wpa);
 200         wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 201         wpa_s->reassociate = 1;
 202         wpa_supplicant_req_scan(wpa_s, 0, 0);
 203 }
 204
 205
 206 /**
 207  * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
 208  * @wpa_s: Pointer to wpa_supplicant data
 209  * @sec: Number of seconds after which to time out authentication
 210  * @usec: Number of microseconds after which to time out authentication
 211  *
 212  * This function is used to schedule a timeout for the current authentication
 213  * attempt.
 214  */
 215 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
 216                                      int sec, int usec)
 217 {
 218         if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
 219             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 220                 return;
 221
 222         wpa_msg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
 223                 "%d usec", sec, usec);
 224         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 225         eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
 226 }
 227
 228
 229 /**
 230  * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
 231  * @wpa_s: Pointer to wpa_supplicant data
 232  *
 233  * This function is used to cancel authentication timeout scheduled with
 234  * wpa_supplicant_req_auth_timeout() and it is called when authentication has
 235  * been completed.
 236  */
 237 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
 238 {
 239         wpa_msg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
 240         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 241         wpa_blacklist_del(wpa_s, wpa_s->bssid);
 242 }
 243
 244
 245 /**
 246  * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
 247  * @wpa_s: Pointer to wpa_supplicant data
 248  *
 249  * This function is used to configure EAPOL state machine based on the selected
 250  * authentication mode.
 251  */
 252 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
 253 {
 254 #ifdef IEEE8021X_EAPOL
 255         struct eapol_config eapol_conf;
 256         struct wpa_ssid *ssid = wpa_s->current_ssid;
 257
 258 #ifdef CONFIG_IBSS_RSN
 259         if (ssid->mode == IEEE80211_MODE_IBSS &&
 260             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
 261             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
 262                 /*
 263                  * RSN IBSS authentication is per-STA and we can disable the
 264                  * per-BSSID EAPOL authentication.
 265                  */
 266                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 267                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 268                 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 269                 return;
 270         }
 271 #endif /* CONFIG_IBSS_RSN */
 272
 273         eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 274         eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 275
 276         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 277             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 278                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 279         else
 280                 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
 281
 282         os_memset(&eapol_conf, 0, sizeof(eapol_conf));
 283         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 284                 eapol_conf.accept_802_1x_keys = 1;
 285                 eapol_conf.required_keys = 0;
 286                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
 287                         eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
 288                 }
 289                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
 290                         eapol_conf.required_keys |=
 291                                 EAPOL_REQUIRE_KEY_BROADCAST;
 292                 }
 293
 294                 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 295                         eapol_conf.required_keys = 0;
 296         }
 297         if (wpa_s->conf)
 298                 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
 299         eapol_conf.workaround = ssid->eap_workaround;
 300         eapol_conf.eap_disabled =
 301                 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
 302                 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 303                 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
 304         eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
 305 #endif /* IEEE8021X_EAPOL */
 306 }
 307
 308
 309 /**
 310  * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
 311  * @wpa_s: Pointer to wpa_supplicant data
 312  * @ssid: Configuration data for the network
 313  *
 314  * This function is used to configure WPA state machine and related parameters
 315  * to a mode where WPA is not enabled. This is called as part of the
 316  * authentication configuration when the selected network does not use WPA.
 317  */
 318 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 319                                        struct wpa_ssid *ssid)
 320 {
 321         int i;
 322
 323         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 324                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
 325         else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
 326                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 327         else
 328                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 329         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 330         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 331         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 332         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 333         wpa_s->group_cipher = WPA_CIPHER_NONE;
 334         wpa_s->mgmt_group_cipher = 0;
 335
 336         for (i = 0; i < NUM_WEP_KEYS; i++) {
 337                 if (ssid->wep_key_len[i] > 5) {
 338                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
 339                         wpa_s->group_cipher = WPA_CIPHER_WEP104;
 340                         break;
 341                 } else if (ssid->wep_key_len[i] > 0) {
 342                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
 343                         wpa_s->group_cipher = WPA_CIPHER_WEP40;
 344                         break;
 345                 }
 346         }
 347
 348         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
 349         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 350         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 351                          wpa_s->pairwise_cipher);
 352         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 353 #ifdef CONFIG_IEEE80211W
 354         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 355                          wpa_s->mgmt_group_cipher);
 356 #endif /* CONFIG_IEEE80211W */
 357
 358         pmksa_cache_clear_current(wpa_s->wpa);
 359 }
 360
 361
 362 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 363 {
 364         bgscan_deinit(wpa_s);
 365         scard_deinit(wpa_s->scard);
 366         wpa_s->scard = NULL;
 367         wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
 368         eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
 369         l2_packet_deinit(wpa_s->l2);
 370         wpa_s->l2 = NULL;
 371         if (wpa_s->l2_br) {
 372                 l2_packet_deinit(wpa_s->l2_br);
 373                 wpa_s->l2_br = NULL;
 374         }
 375
 376         if (wpa_s->ctrl_iface) {
 377                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 378                 wpa_s->ctrl_iface = NULL;
 379         }
 380         if (wpa_s->conf != NULL) {
 381                 wpa_config_free(wpa_s->conf);
 382                 wpa_s->conf = NULL;
 383         }
 384
 385         os_free(wpa_s->confname);
 386         wpa_s->confname = NULL;
 387
 388         wpa_sm_set_eapol(wpa_s->wpa, NULL);
 389         eapol_sm_deinit(wpa_s->eapol);
 390         wpa_s->eapol = NULL;
 391
 392         rsn_preauth_deinit(wpa_s->wpa);
 393
 394         pmksa_candidate_free(wpa_s->wpa);
 395         wpa_sm_deinit(wpa_s->wpa);
 396         wpa_s->wpa = NULL;
 397         wpa_blacklist_clear(wpa_s);
 398
 399         wpa_scan_results_free(wpa_s->scan_res);
 400         wpa_s->scan_res = NULL;
 401
 402         wpa_supplicant_cancel_scan(wpa_s);
 403         wpa_supplicant_cancel_auth_timeout(wpa_s);
 404
 405         ieee80211_sta_deinit(wpa_s);
 406
 407         wpas_wps_deinit(wpa_s);
 408
 409         wpabuf_free(wpa_s->pending_eapol_rx);
 410         wpa_s->pending_eapol_rx = NULL;
 411
 412 #ifdef CONFIG_IBSS_RSN
 413         ibss_rsn_deinit(wpa_s->ibss_rsn);
 414         wpa_s->ibss_rsn = NULL;
 415 #endif /* CONFIG_IBSS_RSN */
 416
 417 #ifdef CONFIG_SME
 418         os_free(wpa_s->sme.ft_ies);
 419         wpa_s->sme.ft_ies = NULL;
 420         wpa_s->sme.ft_ies_len = 0;
 421 #endif /* CONFIG_SME */
 422
 423 #ifdef CONFIG_AP
 424         wpa_supplicant_ap_deinit(wpa_s);
 425 #endif /* CONFIG_AP */
 426 }
 427
 428
 429 /**
 430  * wpa_clear_keys - Clear keys configured for the driver
 431  * @wpa_s: Pointer to wpa_supplicant data
 432  * @addr: Previously used BSSID or %NULL if not available
 433  *
 434  * This function clears the encryption keys that has been previously configured
 435  * for the driver.
 436  */
 437 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
 438 {
 439         u8 *bcast = (u8 *) "\xff\xff\xff\xff\xff\xff";
 440
 441         if (wpa_s->keys_cleared) {
 442                 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
 443                  * timing issues with keys being cleared just before new keys
 444                  * are set or just after association or something similar. This
 445                  * shows up in group key handshake failing often because of the
 446                  * client not receiving the first encrypted packets correctly.
 447                  * Skipping some of the extra key clearing steps seems to help
 448                  * in completing group key handshake more reliably. */
 449                 wpa_printf(MSG_DEBUG, "No keys have been configured - "
 450                            "skip key clearing");
 451                 return;
 452         }
 453
 454         /* MLME-DELETEKEYS.request */
 455         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 0, 0, NULL, 0, NULL, 0);
 456         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 1, 0, NULL, 0, NULL, 0);
 457         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 2, 0, NULL, 0, NULL, 0);
 458         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 3, 0, NULL, 0, NULL, 0);
 459 #ifdef CONFIG_IEEE80211W
 460         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 4, 0, NULL, 0, NULL, 0);
 461         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 5, 0, NULL, 0, NULL, 0);
 462 #endif /* CONFIG_IEEE80211W */
 463         if (addr) {
 464                 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
 465                                 0);
 466                 /* MLME-SETPROTECTION.request(None) */
 467                 wpa_drv_mlme_setprotection(
 468                         wpa_s, addr,
 469                         MLME_SETPROTECTION_PROTECT_TYPE_NONE,
 470                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 471         }
 472         wpa_s->keys_cleared = 1;
 473 }
 474
 475
 476 /**
 477  * wpa_supplicant_state_txt - Get the connection state name as a text string
 478  * @state: State (wpa_state; WPA_*)
 479  * Returns: The state name as a printable text string
 480  */
 481 const char * wpa_supplicant_state_txt(int state)
 482 {
 483         switch (state) {
 484         case WPA_DISCONNECTED:
 485                 return "DISCONNECTED";
 486         case WPA_INACTIVE:
 487                 return "INACTIVE";
 488         case WPA_SCANNING:
 489                 return "SCANNING";
 490         case WPA_AUTHENTICATING:
 491                 return "AUTHENTICATING";
 492         case WPA_ASSOCIATING:
 493                 return "ASSOCIATING";
 494         case WPA_ASSOCIATED:
 495                 return "ASSOCIATED";
 496         case WPA_4WAY_HANDSHAKE:
 497                 return "4WAY_HANDSHAKE";
 498         case WPA_GROUP_HANDSHAKE:
 499                 return "GROUP_HANDSHAKE";
 500         case WPA_COMPLETED:
 501                 return "COMPLETED";
 502         default:
 503                 return "UNKNOWN";
 504         }
 505 }
 506
 507
 508 /**
 509  * wpa_supplicant_set_state - Set current connection state
 510  * @wpa_s: Pointer to wpa_supplicant data
 511  * @state: The new connection state
 512  *
 513  * This function is called whenever the connection state changes, e.g.,
 514  * association is completed for WPA/WPA2 4-Way Handshake is started.
 515  */
 516 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, wpa_states state)
 517 {
 518         wpa_printf(MSG_DEBUG, "State: %s -> %s",
 519                    wpa_supplicant_state_txt(wpa_s->wpa_state),
 520                    wpa_supplicant_state_txt(state));
 521
 522         if (state != WPA_SCANNING)
 523                 wpa_supplicant_notify_scanning(wpa_s, 0);
 524
 525         wpas_notify_state_changed(wpa_s, state, wpa_s->wpa_state);
 526
 527         if (state == WPA_COMPLETED && wpa_s->new_connection) {
 528 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
 529                 struct wpa_ssid *ssid = wpa_s->current_ssid;
 530                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
 531                         MACSTR " completed %s [id=%d id_str=%s]",
 532                         MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
 533                         "(reauth)" : "(auth)",
 534                         ssid ? ssid->id : -1,
 535                         ssid && ssid->id_str ? ssid->id_str : "");
 536 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
 537                 wpa_s->new_connection = 0;
 538                 wpa_s->reassociated_connection = 1;
 539                 wpa_drv_set_operstate(wpa_s, 1);
 540         } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 541                    state == WPA_ASSOCIATED) {
 542                 wpa_s->new_connection = 1;
 543                 wpa_drv_set_operstate(wpa_s, 0);
 544         }
 545         wpa_s->wpa_state = state;
 546 }
 547
 548
 549 static void wpa_supplicant_terminate(int sig, void *eloop_ctx,
 550                                      void *signal_ctx)
 551 {
 552         struct wpa_global *global = eloop_ctx;
 553         struct wpa_supplicant *wpa_s;
 554         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 555                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
 556                         "received", sig);
 557         }
 558         eloop_terminate();
 559 }
 560
 561
 562 static void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
 563 {
 564         wpa_states old_state = wpa_s->wpa_state;
 565         wpa_s->pairwise_cipher = 0;
 566         wpa_s->group_cipher = 0;
 567         wpa_s->mgmt_group_cipher = 0;
 568         wpa_s->key_mgmt = 0;
 569         wpa_s->wpa_state = WPA_DISCONNECTED;
 570         wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
 571 }
 572
 573
 574 /**
 575  * wpa_supplicant_reload_configuration - Reload configuration data
 576  * @wpa_s: Pointer to wpa_supplicant data
 577  * Returns: 0 on success or -1 if configuration parsing failed
 578  *
 579  * This function can be used to request that the configuration data is reloaded
 580  * (e.g., after configuration file change). This function is reloading
 581  * configuration only for one interface, so this may need to be called multiple
 582  * times if %wpa_supplicant is controlling multiple interfaces and all
 583  * interfaces need reconfiguration.
 584  */
 585 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
 586 {
 587         struct wpa_config *conf;
 588         struct wpa_ssid *old_ssid;
 589         int reconf_ctrl;
 590         int old_ap_scan;
 591
 592         if (wpa_s->confname == NULL)
 593                 return -1;
 594         conf = wpa_config_read(wpa_s->confname);
 595         if (conf == NULL) {
 596                 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
 597                         "file '%s' - exiting", wpa_s->confname);
 598                 return -1;
 599         }
 600
 601         reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
 602                 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
 603                     os_strcmp(conf->ctrl_interface,
 604                               wpa_s->conf->ctrl_interface) != 0);
 605
 606         if (reconf_ctrl && wpa_s->ctrl_iface) {
 607                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 608                 wpa_s->ctrl_iface = NULL;
 609         }
 610
 611         eapol_sm_invalidate_cached_session(wpa_s->eapol);
 612         old_ssid = wpa_s->current_ssid;
 613         wpa_s->current_ssid = NULL;
 614         if (old_ssid != wpa_s->current_ssid)
 615                 wpas_notify_network_changed(wpa_s);
 616
 617         /*
 618          * TODO: should notify EAPOL SM about changes in opensc_engine_path,
 619          * pkcs11_engine_path, pkcs11_module_path.
 620          */
 621         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 622                 /*
 623                  * Clear forced success to clear EAP state for next
 624                  * authentication.
 625                  */
 626                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 627         }
 628         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 629         wpa_sm_set_config(wpa_s->wpa, NULL);
 630         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
 631         rsn_preauth_deinit(wpa_s->wpa);
 632
 633         old_ap_scan = wpa_s->conf->ap_scan;
 634         wpa_config_free(wpa_s->conf);
 635         wpa_s->conf = conf;
 636         if (old_ap_scan != wpa_s->conf->ap_scan)
 637                 wpas_notify_ap_scan_changed(wpa_s);
 638
 639         if (reconf_ctrl)
 640                 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
 641
 642         wpa_supplicant_clear_status(wpa_s);
 643         wpa_s->reassociate = 1;
 644         wpa_supplicant_req_scan(wpa_s, 0, 0);
 645         wpa_msg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
 646         return 0;
 647 }
 648
 649
 650 static void wpa_supplicant_reconfig(int sig, void *eloop_ctx,
 651                                     void *signal_ctx)
 652 {
 653         struct wpa_global *global = eloop_ctx;
 654         struct wpa_supplicant *wpa_s;
 655         wpa_printf(MSG_DEBUG, "Signal %d received - reconfiguring", sig);
 656         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 657                 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
 658                         eloop_terminate();
 659                 }
 660         }
 661 }
 662
 663
 664 static wpa_cipher cipher_suite2driver(int cipher)
 665 {
 666         switch (cipher) {
 667         case WPA_CIPHER_NONE:
 668                 return CIPHER_NONE;
 669         case WPA_CIPHER_WEP40:
 670                 return CIPHER_WEP40;
 671         case WPA_CIPHER_WEP104:
 672                 return CIPHER_WEP104;
 673         case WPA_CIPHER_CCMP:
 674                 return CIPHER_CCMP;
 675         case WPA_CIPHER_TKIP:
 676         default:
 677                 return CIPHER_TKIP;
 678         }
 679 }
 680
 681
 682 static wpa_key_mgmt key_mgmt2driver(int key_mgmt)
 683 {
 684         switch (key_mgmt) {
 685         case WPA_KEY_MGMT_NONE:
 686                 return KEY_MGMT_NONE;
 687         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
 688                 return KEY_MGMT_802_1X_NO_WPA;
 689         case WPA_KEY_MGMT_IEEE8021X:
 690                 return KEY_MGMT_802_1X;
 691         case WPA_KEY_MGMT_WPA_NONE:
 692                 return KEY_MGMT_WPA_NONE;
 693         case WPA_KEY_MGMT_FT_IEEE8021X:
 694                 return KEY_MGMT_FT_802_1X;
 695         case WPA_KEY_MGMT_FT_PSK:
 696                 return KEY_MGMT_FT_PSK;
 697         case WPA_KEY_MGMT_IEEE8021X_SHA256:
 698                 return KEY_MGMT_802_1X_SHA256;
 699         case WPA_KEY_MGMT_PSK_SHA256:
 700                 return KEY_MGMT_PSK_SHA256;
 701         case WPA_KEY_MGMT_WPS:
 702                 return KEY_MGMT_WPS;
 703         case WPA_KEY_MGMT_PSK:
 704         default:
 705                 return KEY_MGMT_PSK;
 706         }
 707 }
 708
 709
 710 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
 711                                          struct wpa_ssid *ssid,
 712                                          struct wpa_ie_data *ie)
 713 {
 714         int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
 715         if (ret) {
 716                 if (ret == -2) {
 717                         wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
 718                                 "from association info");
 719                 }
 720                 return -1;
 721         }
 722
 723         wpa_printf(MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set cipher "
 724                    "suites");
 725         if (!(ie->group_cipher & ssid->group_cipher)) {
 726                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
 727                         "cipher 0x%x (mask 0x%x) - reject",
 728                         ie->group_cipher, ssid->group_cipher);
 729                 return -1;
 730         }
 731         if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
 732                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
 733                         "cipher 0x%x (mask 0x%x) - reject",
 734                         ie->pairwise_cipher, ssid->pairwise_cipher);
 735                 return -1;
 736         }
 737         if (!(ie->key_mgmt & ssid->key_mgmt)) {
 738                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
 739                         "management 0x%x (mask 0x%x) - reject",
 740                         ie->key_mgmt, ssid->key_mgmt);
 741                 return -1;
 742         }
 743
 744 #ifdef CONFIG_IEEE80211W
 745         if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
 746             ssid->ieee80211w == IEEE80211W_REQUIRED) {
 747                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
 748                         "that does not support management frame protection - "
 749                         "reject");
 750                 return -1;
 751         }
 752 #endif /* CONFIG_IEEE80211W */
 753
 754         return 0;
 755 }
 756
 757
 758 /**
 759  * wpa_supplicant_set_suites - Set authentication and encryption parameters
 760  * @wpa_s: Pointer to wpa_supplicant data
 761  * @bss: Scan results for the selected BSS, or %NULL if not available
 762  * @ssid: Configuration data for the selected network
 763  * @wpa_ie: Buffer for the WPA/RSN IE
 764  * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
 765  * used buffer length in case the functions returns success.
 766  * Returns: 0 on success or -1 on failure
 767  *
 768  * This function is used to configure authentication and encryption parameters
 769  * based on the network configuration and scan result for the selected BSS (if
 770  * available).
 771  */
 772 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 773                               struct wpa_scan_res *bss,
 774                               struct wpa_ssid *ssid,
 775                               u8 *wpa_ie, size_t *wpa_ie_len)
 776 {
 777         struct wpa_ie_data ie;
 778         int sel, proto;
 779         const u8 *bss_wpa, *bss_rsn;
 780
 781         if (bss) {
 782                 bss_wpa = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 783                 bss_rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 784         } else
 785                 bss_wpa = bss_rsn = NULL;
 786
 787         if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
 788             wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
 789             (ie.group_cipher & ssid->group_cipher) &&
 790             (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 791             (ie.key_mgmt & ssid->key_mgmt)) {
 792                 wpa_msg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
 793                 proto = WPA_PROTO_RSN;
 794         } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
 795                    wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
 796                    (ie.group_cipher & ssid->group_cipher) &&
 797                    (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 798                    (ie.key_mgmt & ssid->key_mgmt)) {
 799                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
 800                 proto = WPA_PROTO_WPA;
 801         } else if (bss) {
 802                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
 803                 return -1;
 804         } else {
 805                 if (ssid->proto & WPA_PROTO_RSN)
 806                         proto = WPA_PROTO_RSN;
 807                 else
 808                         proto = WPA_PROTO_WPA;
 809                 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
 810                         os_memset(&ie, 0, sizeof(ie));
 811                         ie.group_cipher = ssid->group_cipher;
 812                         ie.pairwise_cipher = ssid->pairwise_cipher;
 813                         ie.key_mgmt = ssid->key_mgmt;
 814 #ifdef CONFIG_IEEE80211W
 815                         ie.mgmt_group_cipher =
 816                                 ssid->ieee80211w != NO_IEEE80211W ?
 817                                 WPA_CIPHER_AES_128_CMAC : 0;
 818 #endif /* CONFIG_IEEE80211W */
 819                         wpa_printf(MSG_DEBUG, "WPA: Set cipher suites based "
 820                                    "on configuration");
 821                 } else
 822                         proto = ie.proto;
 823         }
 824
 825         wpa_printf(MSG_DEBUG, "WPA: Selected cipher suites: group %d "
 826                    "pairwise %d key_mgmt %d proto %d",
 827                    ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
 828 #ifdef CONFIG_IEEE80211W
 829         if (ssid->ieee80211w) {
 830                 wpa_printf(MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
 831                            ie.mgmt_group_cipher);
 832         }
 833 #endif /* CONFIG_IEEE80211W */
 834
 835         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
 836         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
 837                          !!(ssid->proto & WPA_PROTO_RSN));
 838
 839         if (bss || !wpa_s->ap_ies_from_associnfo) {
 840                 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
 841                                          bss_wpa ? 2 + bss_wpa[1] : 0) ||
 842                     wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
 843                                          bss_rsn ? 2 + bss_rsn[1] : 0))
 844                         return -1;
 845         }
 846
 847         sel = ie.group_cipher & ssid->group_cipher;
 848         if (sel & WPA_CIPHER_CCMP) {
 849                 wpa_s->group_cipher = WPA_CIPHER_CCMP;
 850                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
 851         } else if (sel & WPA_CIPHER_TKIP) {
 852                 wpa_s->group_cipher = WPA_CIPHER_TKIP;
 853                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
 854         } else if (sel & WPA_CIPHER_WEP104) {
 855                 wpa_s->group_cipher = WPA_CIPHER_WEP104;
 856                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
 857         } else if (sel & WPA_CIPHER_WEP40) {
 858                 wpa_s->group_cipher = WPA_CIPHER_WEP40;
 859                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
 860         } else {
 861                 wpa_printf(MSG_WARNING, "WPA: Failed to select group cipher.");
 862                 return -1;
 863         }
 864
 865         sel = ie.pairwise_cipher & ssid->pairwise_cipher;
 866         if (sel & WPA_CIPHER_CCMP) {
 867                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 868                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
 869         } else if (sel & WPA_CIPHER_TKIP) {
 870                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 871                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
 872         } else if (sel & WPA_CIPHER_NONE) {
 873                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 874                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
 875         } else {
 876                 wpa_printf(MSG_WARNING, "WPA: Failed to select pairwise "
 877                            "cipher.");
 878                 return -1;
 879         }
 880
 881         sel = ie.key_mgmt & ssid->key_mgmt;
 882         if (0) {
 883 #ifdef CONFIG_IEEE80211R
 884         } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
 885                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
 886                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
 887         } else if (sel & WPA_KEY_MGMT_FT_PSK) {
 888                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
 889                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
 890 #endif /* CONFIG_IEEE80211R */
 891 #ifdef CONFIG_IEEE80211W
 892         } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
 893                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
 894                 wpa_msg(wpa_s, MSG_DEBUG,
 895                         "WPA: using KEY_MGMT 802.1X with SHA256");
 896         } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
 897                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
 898                 wpa_msg(wpa_s, MSG_DEBUG,
 899                         "WPA: using KEY_MGMT PSK with SHA256");
 900 #endif /* CONFIG_IEEE80211W */
 901         } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
 902                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 903                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
 904         } else if (sel & WPA_KEY_MGMT_PSK) {
 905                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
 906                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
 907         } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
 908                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
 909                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
 910         } else {
 911                 wpa_printf(MSG_WARNING, "WPA: Failed to select authenticated "
 912                            "key management type.");
 913                 return -1;
 914         }
 915
 916         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 917         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 918                          wpa_s->pairwise_cipher);
 919         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 920
 921 #ifdef CONFIG_IEEE80211W
 922         sel = ie.mgmt_group_cipher;
 923         if (ssid->ieee80211w == NO_IEEE80211W ||
 924             !(ie.capabilities & WPA_CAPABILITY_MFPC))
 925                 sel = 0;
 926         if (sel & WPA_CIPHER_AES_128_CMAC) {
 927                 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
 928                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
 929                         "AES-128-CMAC");
 930         } else {
 931                 wpa_s->mgmt_group_cipher = 0;
 932                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
 933         }
 934         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 935                          wpa_s->mgmt_group_cipher);
 936 #endif /* CONFIG_IEEE80211W */
 937
 938         if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
 939                 wpa_printf(MSG_WARNING, "WPA: Failed to generate WPA IE.");
 940                 return -1;
 941         }
 942
 943         if (ssid->key_mgmt &
 944             (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
 945                 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
 946         else
 947                 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
 948
 949         return 0;
 950 }
 951
 952
 953 /**
 954  * wpa_supplicant_associate - Request association
 955  * @wpa_s: Pointer to wpa_supplicant data
 956  * @bss: Scan results for the selected BSS, or %NULL if not available
 957  * @ssid: Configuration data for the selected network
 958  *
 959  * This function is used to request %wpa_supplicant to associate with a BSS.
 960  */
 961 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
 962                               struct wpa_scan_res *bss, struct wpa_ssid *ssid)
 963 {
 964         u8 wpa_ie[80];
 965         size_t wpa_ie_len;
 966         int use_crypt, ret, i, bssid_changed;
 967         int algs = AUTH_ALG_OPEN_SYSTEM;
 968         wpa_cipher cipher_pairwise, cipher_group;
 969         struct wpa_driver_associate_params params;
 970         int wep_keys_set = 0;
 971         struct wpa_driver_capa capa;
 972         int assoc_failed = 0;
 973         struct wpa_ssid *old_ssid;
 974
 975         if (ssid->mode == 2) {
 976 #ifdef CONFIG_AP
 977                 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
 978                         wpa_printf(MSG_INFO, "Driver does not support AP "
 979                                    "mode");
 980                         return;
 981                 }
 982                 wpa_supplicant_create_ap(wpa_s, ssid);
 983 #else /* CONFIG_AP */
 984                 wpa_printf(MSG_ERROR, "AP mode support not included in the "
 985                            "build");
 986 #endif /* CONFIG_AP */
 987                 return;
 988         }
 989
 990         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) {
 991                 sme_authenticate(wpa_s, bss, ssid);
 992                 return;
 993         }
 994
 995         wpa_s->reassociate = 0;
 996         if (bss) {
 997 #ifdef CONFIG_IEEE80211R
 998                 const u8 *md = NULL;
 999 #endif /* CONFIG_IEEE80211R */
1000                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1001                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1002                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1003                         ie ? wpa_ssid_txt(ie + 2, ie[1]) : "", bss->freq);
1004                 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1005                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1006                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1007                 if (bssid_changed)
1008                         wpas_notify_bssid_changed(wpa_s);
1009 #ifdef CONFIG_IEEE80211R
1010                 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1011                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1012                         md = ie + 2;
1013                 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
1014                 if (md) {
1015                         /* Prepare for the next transition */
1016                         wpa_ft_prepare_auth_request(wpa_s->wpa);
1017                 }
1018 #endif /* CONFIG_IEEE80211R */
1019 #ifdef CONFIG_WPS
1020         } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1021                    wpa_s->conf->ap_scan == 2 &&
1022                    (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1023                 /* Use ap_scan==1 style network selection to find the network
1024                  */
1025                 wpa_s->scan_req = 2;
1026                 wpa_s->reassociate = 1;
1027                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1028                 return;
1029 #endif /* CONFIG_WPS */
1030         } else {
1031                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1032                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1033                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1034         }
1035         wpa_supplicant_cancel_scan(wpa_s);
1036
1037         /* Starting new association, so clear the possibly used WPA IE from the
1038          * previous association. */
1039         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1040
1041 #ifdef IEEE8021X_EAPOL
1042         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1043                 if (ssid->leap) {
1044                         if (ssid->non_leap == 0)
1045                                 algs = AUTH_ALG_LEAP;
1046                         else
1047                                 algs |= AUTH_ALG_LEAP;
1048                 }
1049         }
1050 #endif /* IEEE8021X_EAPOL */
1051         wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1052         if (ssid->auth_alg) {
1053                 algs = 0;
1054                 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
1055                         algs |= AUTH_ALG_OPEN_SYSTEM;
1056                 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
1057                         algs |= AUTH_ALG_SHARED_KEY;
1058                 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
1059                         algs |= AUTH_ALG_LEAP;
1060                 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
1061                            algs);
1062         }
1063
1064         if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1065                     wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
1066             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1067                                WPA_KEY_MGMT_FT_IEEE8021X |
1068                                WPA_KEY_MGMT_FT_PSK |
1069                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
1070                                WPA_KEY_MGMT_PSK_SHA256))) {
1071                 int try_opportunistic;
1072                 try_opportunistic = ssid->proactive_key_caching &&
1073                         (ssid->proto & WPA_PROTO_RSN);
1074                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1075                                             wpa_s->current_ssid,
1076                                             try_opportunistic) == 0)
1077                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1078                 wpa_ie_len = sizeof(wpa_ie);
1079                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1080                                               wpa_ie, &wpa_ie_len)) {
1081                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1082                                    "management and encryption suites");
1083                         return;
1084                 }
1085         } else if (ssid->key_mgmt &
1086                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1087                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1088                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1089                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1090                 wpa_ie_len = sizeof(wpa_ie);
1091                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1092                                               wpa_ie, &wpa_ie_len)) {
1093                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1094                                    "management and encryption suites (no scan "
1095                                    "results)");
1096                         return;
1097                 }
1098 #ifdef CONFIG_WPS
1099         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1100                 struct wpabuf *wps_ie;
1101                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1102                 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1103                         wpa_ie_len = wpabuf_len(wps_ie);
1104                         os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1105                 } else
1106                         wpa_ie_len = 0;
1107                 wpabuf_free(wps_ie);
1108                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1109 #endif /* CONFIG_WPS */
1110         } else {
1111                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1112                 wpa_ie_len = 0;
1113         }
1114
1115         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1116         use_crypt = 1;
1117         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1118         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1119         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1120             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1121                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1122                         use_crypt = 0;
1123                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1124                         use_crypt = 1;
1125                         wep_keys_set = 1;
1126                 }
1127         }
1128         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1129                 use_crypt = 0;
1130
1131 #ifdef IEEE8021X_EAPOL
1132         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1133                 if ((ssid->eapol_flags &
1134                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1135                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1136                     !wep_keys_set) {
1137                         use_crypt = 0;
1138                 } else {
1139                         /* Assume that dynamic WEP-104 keys will be used and
1140                          * set cipher suites in order for drivers to expect
1141                          * encryption. */
1142                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1143                 }
1144         }
1145 #endif /* IEEE8021X_EAPOL */
1146
1147         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1148                 /* Set the key before (and later after) association */
1149                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1150         }
1151
1152         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1153         os_memset(&params, 0, sizeof(params));
1154         if (bss) {
1155                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1156                 params.bssid = bss->bssid;
1157                 params.ssid = ie ? ie + 2 : (u8 *) "";
1158                 params.ssid_len = ie ? ie[1] : 0;
1159                 params.freq = bss->freq;
1160         } else {
1161                 params.ssid = ssid->ssid;
1162                 params.ssid_len = ssid->ssid_len;
1163         }
1164         if (ssid->mode == 1 && ssid->frequency > 0 && params.freq == 0)
1165                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1166         params.wpa_ie = wpa_ie;
1167         params.wpa_ie_len = wpa_ie_len;
1168         params.pairwise_suite = cipher_pairwise;
1169         params.group_suite = cipher_group;
1170         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1171         params.auth_alg = algs;
1172         params.mode = ssid->mode;
1173         for (i = 0; i < NUM_WEP_KEYS; i++) {
1174                 if (ssid->wep_key_len[i])
1175                         params.wep_key[i] = ssid->wep_key[i];
1176                 params.wep_key_len[i] = ssid->wep_key_len[i];
1177         }
1178         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1179
1180         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1181             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1182              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1183                 params.passphrase = ssid->passphrase;
1184                 if (ssid->psk_set)
1185                         params.psk = ssid->psk;
1186         }
1187
1188         params.drop_unencrypted = use_crypt;
1189
1190 #ifdef CONFIG_IEEE80211W
1191         switch (ssid->ieee80211w) {
1192         case NO_IEEE80211W:
1193                 params.mgmt_frame_protection = NO_MGMT_FRAME_PROTECTION;
1194                 break;
1195         case IEEE80211W_OPTIONAL:
1196                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_OPTIONAL;
1197                 break;
1198         case IEEE80211W_REQUIRED:
1199                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_REQUIRED;
1200                 break;
1201         }
1202         if (ssid->ieee80211w != NO_IEEE80211W && bss) {
1203                 const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
1204                 struct wpa_ie_data ie;
1205                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1206                     ie.capabilities &
1207                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1208                         wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
1209                                    "require MFP");
1210                         params.mgmt_frame_protection =
1211                                 MGMT_FRAME_PROTECTION_REQUIRED;
1212                 }
1213         }
1214 #endif /* CONFIG_IEEE80211W */
1215
1216         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1217                 ret = ieee80211_sta_associate(wpa_s, &params);
1218         else
1219                 ret = wpa_drv_associate(wpa_s, &params);
1220         if (ret < 0) {
1221                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1222                         "failed");
1223                 /* try to continue anyway; new association will be tried again
1224                  * after timeout */
1225                 assoc_failed = 1;
1226         }
1227
1228         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1229                 /* Set the key after the association just in case association
1230                  * cleared the previously configured key. */
1231                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1232                 /* No need to timeout authentication since there is no key
1233                  * management. */
1234                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1235                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1236 #ifdef CONFIG_IBSS_RSN
1237         } else if (ssid->mode == IEEE80211_MODE_IBSS &&
1238                    wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1239                    wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1240                 ibss_rsn_set_psk(wpa_s->ibss_rsn, ssid->psk);
1241                 /*
1242                  * RSN IBSS authentication is per-STA and we can disable the
1243                  * per-BSSID authentication.
1244                  */
1245                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1246                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1247 #endif /* CONFIG_IBSS_RSN */
1248         } else {
1249                 /* Timeout for IEEE 802.11 authentication and association */
1250                 int timeout = 60;
1251
1252                 if (assoc_failed) {
1253                         /* give IBSS a bit more time */
1254                         timeout = ssid->mode ? 10 : 5;
1255                 } else if (wpa_s->conf->ap_scan == 1) {
1256                         /* give IBSS a bit more time */
1257                         timeout = ssid->mode ? 20 : 10;
1258                 }
1259                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1260         }
1261
1262         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1263             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1264                 /* Set static WEP keys again */
1265                 wpa_set_wep_keys(wpa_s, ssid);
1266         }
1267
1268         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1269                 /*
1270                  * Do not allow EAP session resumption between different
1271                  * network configurations.
1272                  */
1273                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1274         }
1275         old_ssid = wpa_s->current_ssid;
1276         wpa_s->current_ssid = ssid;
1277         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1278         wpa_supplicant_initiate_eapol(wpa_s);
1279         if (old_ssid != wpa_s->current_ssid)
1280                 wpas_notify_network_changed(wpa_s);
1281 }
1282
1283
1284 /**
1285  * wpa_supplicant_disassociate - Disassociate the current connection
1286  * @wpa_s: Pointer to wpa_supplicant data
1287  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1288  *
1289  * This function is used to request %wpa_supplicant to disassociate with the
1290  * current AP.
1291  */
1292 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1293                                  int reason_code)
1294 {
1295         struct wpa_ssid *old_ssid;
1296         u8 *addr = NULL;
1297
1298         if (!is_zero_ether_addr(wpa_s->bssid)) {
1299                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1300                         ieee80211_sta_disassociate(wpa_s, reason_code);
1301                 else
1302                         wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1303                 addr = wpa_s->bssid;
1304         }
1305         wpa_clear_keys(wpa_s, addr);
1306         wpa_supplicant_mark_disassoc(wpa_s);
1307         old_ssid = wpa_s->current_ssid;
1308         wpa_s->current_ssid = NULL;
1309         wpa_sm_set_config(wpa_s->wpa, NULL);
1310         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1311         if (old_ssid != wpa_s->current_ssid)
1312                 wpas_notify_network_changed(wpa_s);
1313 }
1314
1315
1316 /**
1317  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1318  * @wpa_s: Pointer to wpa_supplicant data
1319  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1320  *
1321  * This function is used to request %wpa_supplicant to deauthenticate from the
1322  * current AP.
1323  */
1324 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1325                                    int reason_code)
1326 {
1327         struct wpa_ssid *old_ssid;
1328         u8 *addr = NULL;
1329
1330         if (!is_zero_ether_addr(wpa_s->bssid)) {
1331                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1332                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1333                 else
1334                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1335                                                reason_code);
1336                 addr = wpa_s->bssid;
1337         }
1338         wpa_clear_keys(wpa_s, addr);
1339         wpa_supplicant_mark_disassoc(wpa_s);
1340         old_ssid = wpa_s->current_ssid;
1341         wpa_s->current_ssid = NULL;
1342         wpa_sm_set_config(wpa_s->wpa, NULL);
1343         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1344         if (old_ssid != wpa_s->current_ssid)
1345                 wpas_notify_network_changed(wpa_s);
1346 }
1347
1348
1349 /**
1350  * wpa_supplicant_enable_network - Mark a configured network as enabled
1351  * @wpa_s: wpa_supplicant structure for a network interface
1352  * @ssid: wpa_ssid structure for a configured network or %NULL
1353  *
1354  * Enables the specified network or all networks if no network specified.
1355  */
1356 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1357                                    struct wpa_ssid *ssid)
1358 {
1359         struct wpa_ssid *other_ssid;
1360         int was_disabled;
1361
1362         if (ssid == NULL) {
1363                 other_ssid = wpa_s->conf->ssid;
1364                 while (other_ssid) {
1365                         if (other_ssid == wpa_s->current_ssid &&
1366                             other_ssid->disabled)
1367                                 wpa_s->reassociate = 1;
1368
1369                         was_disabled = other_ssid->disabled;
1370
1371                         other_ssid->disabled = 0;
1372
1373                         if (was_disabled != other_ssid->disabled)
1374                                 wpas_notify_network_enabled_changed(
1375                                         wpa_s, other_ssid);
1376
1377                         other_ssid = other_ssid->next;
1378                 }
1379                 if (wpa_s->reassociate)
1380                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1381         } else if (wpa_s->current_ssid == NULL && ssid->disabled) {
1382                 /*
1383                  * Try to reassociate since there is no current configuration
1384                  * and a new network was made available.
1385                  */
1386                 wpa_s->reassociate = 1;
1387                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1388
1389                 was_disabled = ssid->disabled;
1390
1391                 ssid->disabled = 0;
1392
1393                 if (was_disabled != ssid->disabled)
1394                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1395         }
1396 }
1397
1398
1399 /**
1400  * wpa_supplicant_disable_network - Mark a configured network as disabled
1401  * @wpa_s: wpa_supplicant structure for a network interface
1402  * @ssid: wpa_ssid structure for a configured network or %NULL
1403  *
1404  * Disables the specified network or all networks if no network specified.
1405  */
1406 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1407                                     struct wpa_ssid *ssid)
1408 {
1409         struct wpa_ssid *other_ssid;
1410         int was_disabled;
1411
1412         if (ssid == NULL) {
1413                 other_ssid = wpa_s->conf->ssid;
1414                 while (other_ssid) {
1415                         was_disabled = other_ssid->disabled;
1416
1417                         other_ssid->disabled = 1;
1418
1419                         if (was_disabled != other_ssid->disabled)
1420                                 wpas_notify_network_enabled_changed(
1421                                         wpa_s, other_ssid);
1422
1423                         other_ssid = other_ssid->next;
1424                 }
1425                 if (wpa_s->current_ssid)
1426                         wpa_supplicant_disassociate(
1427                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1428         } else {
1429                 if (ssid == wpa_s->current_ssid)
1430                         wpa_supplicant_disassociate(
1431                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1432
1433                 was_disabled = ssid->disabled;
1434
1435                 ssid->disabled = 1;
1436
1437                 if (was_disabled != ssid->disabled)
1438                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1439         }
1440 }
1441
1442
1443 /**
1444  * wpa_supplicant_select_network - Attempt association with a network
1445  * @wpa_s: wpa_supplicant structure for a network interface
1446  * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1447  */
1448 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1449                                    struct wpa_ssid *ssid)
1450 {
1451
1452         struct wpa_ssid *other_ssid;
1453
1454         if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1455                 wpa_supplicant_disassociate(
1456                         wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1457
1458         /*
1459          * Mark all other networks disabled or mark all networks enabled if no
1460          * network specified.
1461          */
1462         other_ssid = wpa_s->conf->ssid;
1463         while (other_ssid) {
1464                 int was_disabled = other_ssid->disabled;
1465
1466                 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1467
1468                 if (was_disabled != other_ssid->disabled)
1469                         wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1470
1471                 other_ssid = other_ssid->next;
1472         }
1473         wpa_s->disconnected = 0;
1474         wpa_s->reassociate = 1;
1475         wpa_supplicant_req_scan(wpa_s, 0, 0);
1476
1477         if (ssid)
1478                 wpas_notify_network_selected(wpa_s, ssid);
1479 }
1480
1481
1482 /**
1483  * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1484  * @wpa_s: wpa_supplicant structure for a network interface
1485  * @ap_scan: AP scan mode
1486  * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1487  *
1488  */
1489 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1490 {
1491
1492         int old_ap_scan;
1493
1494         if (ap_scan < 0 || ap_scan > 2)
1495                 return -1;
1496
1497         old_ap_scan = wpa_s->conf->ap_scan;
1498         wpa_s->conf->ap_scan = ap_scan;
1499
1500         if (old_ap_scan != wpa_s->conf->ap_scan)
1501                 wpas_notify_ap_scan_changed(wpa_s);
1502
1503         return 0;
1504 }
1505
1506
1507 /**
1508  * wpa_supplicant_set_debug_params - Set global debug params
1509  * @global: wpa_global structure
1510  * @debug_level: debug level
1511  * @debug_timestamp: determines if show timestamp in debug data
1512  * @debug_show_keys: determines if show keys in debug data
1513  * Returns: 0 if succeed or -1 if debug_level has wrong value
1514  */
1515 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1516                                     int debug_timestamp, int debug_show_keys)
1517 {
1518
1519         int old_level, old_timestamp, old_show_keys;
1520
1521         /* check for allowed debuglevels */
1522         if (debug_level != MSG_MSGDUMP &&
1523             debug_level != MSG_DEBUG &&
1524             debug_level != MSG_INFO &&
1525             debug_level != MSG_WARNING &&
1526             debug_level != MSG_ERROR)
1527                 return -1;
1528
1529         old_level = wpa_debug_level;
1530         old_timestamp = wpa_debug_timestamp;
1531         old_show_keys = wpa_debug_show_keys;
1532
1533         wpa_debug_level = debug_level;
1534         wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1535         wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1536
1537         if (wpa_debug_level != old_level ||
1538             wpa_debug_timestamp != old_timestamp ||
1539             wpa_debug_show_keys != old_show_keys)
1540                 wpas_notify_debug_params_changed(global);
1541
1542         return 0;
1543 }
1544
1545
1546 static void notify_bss_changes(struct wpa_supplicant *wpa_s,
1547                                u8 (*prev_bssids)[ETH_ALEN], int prev_num,
1548                                struct wpa_scan_results *new)
1549 {
1550         int new_num, i, j;
1551
1552         new_num = new != NULL ? new->num : 0;
1553         if (prev_bssids == NULL)
1554                 prev_num = 0;
1555
1556         for (i = 0; i < prev_num; i++) {
1557                 for (j = 0; j < new_num; j++) {
1558                         if (!os_memcmp(prev_bssids[i], new->res[j]->bssid,
1559                                        ETH_ALEN))
1560                                 break;
1561                 }
1562                 if (j == new_num)
1563                         wpas_notify_bss_removed(wpa_s, prev_bssids[i]);
1564         }
1565         for (i = 0; i < new_num; i++) {
1566                 for (j = 0; j < prev_num; j++) {
1567                         if (!os_memcmp(new->res[i]->bssid, prev_bssids[j],
1568                                        ETH_ALEN))
1569                                 break;
1570                 }
1571                 if (j == prev_num)
1572                         wpas_notify_bss_added(wpa_s, new->res[i]->bssid);
1573         }
1574 }
1575
1576
1577 /**
1578  * wpa_supplicant_get_scan_results - Get scan results
1579  * @wpa_s: Pointer to wpa_supplicant data
1580  * Returns: 0 on success, -1 on failure
1581  *
1582  * This function is request the current scan results from the driver and stores
1583  * a local copy of the results in wpa_s->scan_res.
1584  */
1585 int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s)
1586 {
1587         int ret, i, prev_scan_res_num;
1588         u8 (*prev_scan_bssids)[ETH_ALEN];
1589
1590         prev_scan_res_num = wpa_s->scan_res ? wpa_s->scan_res->num : 0;
1591         prev_scan_bssids = os_malloc(prev_scan_res_num * ETH_ALEN);
1592
1593         if (prev_scan_bssids) {
1594                 for (i = 0; i < prev_scan_res_num; i++) {
1595                         os_memcpy(prev_scan_bssids[i],
1596                                   wpa_s->scan_res->res[i]->bssid, ETH_ALEN);
1597                 }
1598         } else {
1599                 wpa_printf(MSG_WARNING, "Not enough memory for old scan "
1600                            "results list");
1601                 prev_scan_res_num = 0;
1602         }
1603
1604         wpa_scan_results_free(wpa_s->scan_res);
1605         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1606                 wpa_s->scan_res = ieee80211_sta_get_scan_results(wpa_s);
1607         else
1608                 wpa_s->scan_res = wpa_drv_get_scan_results2(wpa_s);
1609         if (wpa_s->scan_res == NULL) {
1610                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1611                 ret = -1;
1612         } else {
1613                 ret = 0;
1614                 wpa_scan_sort_results(wpa_s->scan_res);
1615         }
1616
1617         notify_bss_changes(wpa_s, prev_scan_bssids, prev_scan_res_num,
1618                            wpa_s->scan_res);
1619         os_free(prev_scan_bssids);
1620
1621         return ret;
1622 }
1623
1624
1625 /**
1626  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1627  * @wpa_s: Pointer to wpa_supplicant data
1628  * Returns: A pointer to the current network structure or %NULL on failure
1629  */
1630 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1631 {
1632         struct wpa_ssid *entry;
1633         u8 ssid[MAX_SSID_LEN];
1634         int res;
1635         size_t ssid_len;
1636         u8 bssid[ETH_ALEN];
1637         int wired;
1638
1639         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1640                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1641                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1642                                    "MLME.");
1643                         return NULL;
1644                 }
1645         } else {
1646                 res = wpa_drv_get_ssid(wpa_s, ssid);
1647                 if (res < 0) {
1648                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1649                                    "driver.");
1650                         return NULL;
1651                 }
1652                 ssid_len = res;
1653         }
1654
1655         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1656                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1657         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1658                 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1659                 return NULL;
1660         }
1661
1662         wired = wpa_s->conf->ap_scan == 0 &&
1663                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1664
1665         entry = wpa_s->conf->ssid;
1666         while (entry) {
1667                 if (!entry->disabled &&
1668                     ((ssid_len == entry->ssid_len &&
1669                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1670                     (!entry->bssid_set ||
1671                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1672                         return entry;
1673 #ifdef CONFIG_WPS
1674                 if (!entry->disabled &&
1675                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1676                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1677                     (!entry->bssid_set ||
1678                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1679                         return entry;
1680 #endif /* CONFIG_WPS */
1681                 entry = entry->next;
1682         }
1683
1684         return NULL;
1685 }
1686
1687
1688 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1689                                      const char *name)
1690 {
1691         int i;
1692         size_t len;
1693         const char *pos;
1694
1695         if (wpa_s == NULL)
1696                 return -1;
1697
1698         if (wpa_drivers[0] == NULL) {
1699                 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1700                            "wpa_supplicant.");
1701                 return -1;
1702         }
1703
1704         if (name == NULL) {
1705                 /* default to first driver in the list */
1706                 wpa_s->driver = wpa_drivers[0];
1707                 wpa_s->global_drv_priv = wpa_s->global->drv_priv[0];
1708                 return 0;
1709         }
1710
1711         pos = os_strchr(name, ',');
1712         if (pos)
1713                 len = pos - name;
1714         else
1715                 len = os_strlen(name);
1716         for (i = 0; wpa_drivers[i]; i++) {
1717                 if (os_strlen(wpa_drivers[i]->name) == len &&
1718                     os_strncmp(name, wpa_drivers[i]->name, len) ==
1719                     0) {
1720                         wpa_s->driver = wpa_drivers[i];
1721                         wpa_s->global_drv_priv = wpa_s->global->drv_priv[i];
1722                         return 0;
1723                 }
1724         }
1725
1726         wpa_printf(MSG_ERROR, "Unsupported driver '%s'.", name);
1727         return -1;
1728 }
1729
1730
1731 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1732                              const u8 *buf, size_t len)
1733 {
1734         struct wpa_supplicant *wpa_s = ctx;
1735
1736         wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1737         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1738
1739         if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1740                 /*
1741                  * There is possible race condition between receiving the
1742                  * association event and the EAPOL frame since they are coming
1743                  * through different paths from the driver. In order to avoid
1744                  * issues in trying to process the EAPOL frame before receiving
1745                  * association information, lets queue it for processing until
1746                  * the association event is received.
1747                  */
1748                 wpa_printf(MSG_DEBUG, "Not associated - Delay processing of "
1749                            "received EAPOL frame");
1750                 wpabuf_free(wpa_s->pending_eapol_rx);
1751                 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1752                 if (wpa_s->pending_eapol_rx) {
1753                         os_get_time(&wpa_s->pending_eapol_rx_time);
1754                         os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1755                                   ETH_ALEN);
1756                 }
1757                 return;
1758         }
1759
1760 #ifdef CONFIG_AP
1761         if (wpa_s->ap_iface) {
1762                 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
1763                 return;
1764         }
1765 #endif /* CONFIG_AP */
1766
1767         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1768                 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1769                            "no key management is configured");
1770                 return;
1771         }
1772
1773         if (wpa_s->eapol_received == 0 &&
1774             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1775              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1776              wpa_s->wpa_state != WPA_COMPLETED)) {
1777                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1778                 wpa_supplicant_req_auth_timeout(
1779                         wpa_s,
1780                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1781                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1782                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1783                         70 : 10, 0);
1784         }
1785         wpa_s->eapol_received++;
1786
1787         if (wpa_s->countermeasures) {
1788                 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1789                            "packet");
1790                 return;
1791         }
1792
1793 #ifdef CONFIG_IBSS_RSN
1794         if (wpa_s->current_ssid &&
1795             wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS) {
1796                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1797                 return;
1798         }
1799 #endif /* CONFIG_IBSS_RSN */
1800
1801         /* Source address of the incoming EAPOL frame could be compared to the
1802          * current BSSID. However, it is possible that a centralized
1803          * Authenticator could be using another MAC address than the BSSID of
1804          * an AP, so just allow any address to be used for now. The replies are
1805          * still sent to the current BSSID (if available), though. */
1806
1807         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1808         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1809             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1810                 return;
1811         wpa_drv_poll(wpa_s);
1812         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1813                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1814         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1815                 /*
1816                  * Set portValid = TRUE here since we are going to skip 4-way
1817                  * handshake processing which would normally set portValid. We
1818                  * need this to allow the EAPOL state machines to be completed
1819                  * without going through EAPOL-Key handshake.
1820                  */
1821                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1822         }
1823 }
1824
1825
1826 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1827                            struct ieee80211_rx_status *rx_status)
1828 {
1829         struct wpa_supplicant *wpa_s = ctx;
1830         ieee80211_sta_rx(wpa_s, buf, len, rx_status);
1831 }
1832
1833
1834 /**
1835  * wpa_supplicant_driver_init - Initialize driver interface parameters
1836  * @wpa_s: Pointer to wpa_supplicant data
1837  * Returns: 0 on success, -1 on failure
1838  *
1839  * This function is called to initialize driver interface parameters.
1840  * wpa_drv_init() must have been called before this function to initialize the
1841  * driver interface.
1842  */
1843 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1844 {
1845         static int interface_count = 0;
1846
1847         if (wpa_s->driver->send_eapol) {
1848                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1849                 if (addr)
1850                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1851         } else {
1852                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1853                                            wpa_drv_get_mac_addr(wpa_s),
1854                                            ETH_P_EAPOL,
1855                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1856                 if (wpa_s->l2 == NULL)
1857                         return -1;
1858         }
1859
1860         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1861                 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1862                 return -1;
1863         }
1864
1865         wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1866                    MAC2STR(wpa_s->own_addr));
1867
1868         if (wpa_s->bridge_ifname[0]) {
1869                 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1870                            " '%s'", wpa_s->bridge_ifname);
1871                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1872                                               wpa_s->own_addr,
1873                                               ETH_P_EAPOL,
1874                                               wpa_supplicant_rx_eapol, wpa_s,
1875                                               0);
1876                 if (wpa_s->l2_br == NULL) {
1877                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1878                                    "connection for the bridge interface '%s'",
1879                                    wpa_s->bridge_ifname);
1880                         return -1;
1881                 }
1882         }
1883
1884         wpa_clear_keys(wpa_s, NULL);
1885
1886         /* Make sure that TKIP countermeasures are not left enabled (could
1887          * happen if wpa_supplicant is killed during countermeasures. */
1888         wpa_drv_set_countermeasures(wpa_s, 0);
1889
1890         wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1891         wpa_drv_flush_pmkid(wpa_s);
1892
1893         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1894         wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1895         interface_count++;
1896
1897         return 0;
1898 }
1899
1900
1901 static int wpa_supplicant_daemon(const char *pid_file)
1902 {
1903         wpa_printf(MSG_DEBUG, "Daemonize..");
1904         return os_daemonize(pid_file);
1905 }
1906
1907
1908 static struct wpa_supplicant * wpa_supplicant_alloc(void)
1909 {
1910         struct wpa_supplicant *wpa_s;
1911
1912         wpa_s = os_zalloc(sizeof(*wpa_s));
1913         if (wpa_s == NULL)
1914                 return NULL;
1915         wpa_s->scan_req = 1;
1916
1917         return wpa_s;
1918 }
1919
1920
1921 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
1922                                      struct wpa_interface *iface)
1923 {
1924         const char *ifname, *driver;
1925         struct wpa_driver_capa capa;
1926
1927         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
1928                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
1929                    iface->confname ? iface->confname : "N/A",
1930                    iface->driver ? iface->driver : "default",
1931                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
1932                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
1933
1934         if (iface->confname) {
1935 #ifdef CONFIG_BACKEND_FILE
1936                 wpa_s->confname = os_rel2abs_path(iface->confname);
1937                 if (wpa_s->confname == NULL) {
1938                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
1939                                    "for configuration file '%s'.",
1940                                    iface->confname);
1941                         return -1;
1942                 }
1943                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
1944                            iface->confname, wpa_s->confname);
1945 #else /* CONFIG_BACKEND_FILE */
1946                 wpa_s->confname = os_strdup(iface->confname);
1947 #endif /* CONFIG_BACKEND_FILE */
1948                 wpa_s->conf = wpa_config_read(wpa_s->confname);
1949                 if (wpa_s->conf == NULL) {
1950                         wpa_printf(MSG_ERROR, "Failed to read or parse "
1951                                    "configuration '%s'.", wpa_s->confname);
1952                         return -1;
1953                 }
1954
1955                 /*
1956                  * Override ctrl_interface and driver_param if set on command
1957                  * line.
1958                  */
1959                 if (iface->ctrl_interface) {
1960                         os_free(wpa_s->conf->ctrl_interface);
1961                         wpa_s->conf->ctrl_interface =
1962                                 os_strdup(iface->ctrl_interface);
1963                 }
1964
1965                 if (iface->driver_param) {
1966                         os_free(wpa_s->conf->driver_param);
1967                         wpa_s->conf->driver_param =
1968                                 os_strdup(iface->driver_param);
1969                 }
1970         } else
1971                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
1972                                                      iface->driver_param);
1973
1974         if (wpa_s->conf == NULL) {
1975                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
1976                 return -1;
1977         }
1978
1979         if (iface->ifname == NULL) {
1980                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
1981                 return -1;
1982         }
1983         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
1984                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
1985                            iface->ifname);
1986                 return -1;
1987         }
1988         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
1989
1990         if (iface->bridge_ifname) {
1991                 if (os_strlen(iface->bridge_ifname) >=
1992                     sizeof(wpa_s->bridge_ifname)) {
1993                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
1994                                    "name '%s'.", iface->bridge_ifname);
1995                         return -1;
1996                 }
1997                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
1998                            sizeof(wpa_s->bridge_ifname));
1999         }
2000
2001         /* RSNA Supplicant Key Management - INITIALIZE */
2002         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2003         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2004
2005         /* Initialize driver interface and register driver event handler before
2006          * L2 receive handler so that association events are processed before
2007          * EAPOL-Key packets if both become available for the same select()
2008          * call. */
2009         driver = iface->driver;
2010 next_driver:
2011         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2012                 return -1;
2013
2014         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2015         if (wpa_s->drv_priv == NULL) {
2016                 const char *pos;
2017                 pos = os_strchr(driver, ',');
2018                 if (pos) {
2019                         wpa_printf(MSG_DEBUG, "Failed to initialize driver "
2020                                    "interface - try next driver wrapper");
2021                         driver = pos + 1;
2022                         goto next_driver;
2023                 }
2024                 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
2025                 return -1;
2026         }
2027         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2028                 wpa_printf(MSG_ERROR, "Driver interface rejected "
2029                            "driver_param '%s'", wpa_s->conf->driver_param);
2030                 return -1;
2031         }
2032
2033         ifname = wpa_drv_get_ifname(wpa_s);
2034         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2035                 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
2036                            "name with '%s'", ifname);
2037                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2038         }
2039
2040         if (wpa_supplicant_init_wpa(wpa_s) < 0)
2041                 return -1;
2042
2043         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2044                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2045                           NULL);
2046         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2047
2048         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2049             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2050                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2051                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2052                            "dot11RSNAConfigPMKLifetime");
2053                 return -1;
2054         }
2055
2056         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2057             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2058                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2059                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2060                         "dot11RSNAConfigPMKReauthThreshold");
2061                 return -1;
2062         }
2063
2064         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2065             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2066                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
2067                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2068                            "dot11RSNAConfigSATimeout");
2069                 return -1;
2070         }
2071
2072         if (wpa_supplicant_driver_init(wpa_s) < 0)
2073                 return -1;
2074
2075         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2076             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2077                 wpa_printf(MSG_DEBUG, "Failed to set country");
2078                 return -1;
2079         }
2080
2081         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2082
2083         if (wpas_wps_init(wpa_s))
2084                 return -1;
2085
2086         if (wpa_supplicant_init_eapol(wpa_s) < 0)
2087                 return -1;
2088         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2089
2090         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2091         if (wpa_s->ctrl_iface == NULL) {
2092                 wpa_printf(MSG_ERROR,
2093                            "Failed to initialize control interface '%s'.\n"
2094                            "You may have another wpa_supplicant process "
2095                            "already running or the file was\n"
2096                            "left by an unclean termination of wpa_supplicant "
2097                            "in which case you will need\n"
2098                            "to manually remove this file before starting "
2099                            "wpa_supplicant again.\n",
2100                            wpa_s->conf->ctrl_interface);
2101                 return -1;
2102         }
2103
2104         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2105                 wpa_s->drv_flags = capa.flags;
2106                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
2107                         if (ieee80211_sta_init(wpa_s))
2108                                 return -1;
2109                 }
2110                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2111         }
2112
2113 #ifdef CONFIG_IBSS_RSN
2114         wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
2115         if (!wpa_s->ibss_rsn) {
2116                 wpa_printf(MSG_DEBUG, "Failed to init IBSS RSN");
2117                 return -1;
2118         }
2119 #endif /* CONFIG_IBSS_RSN */
2120
2121         return 0;
2122 }
2123
2124
2125 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s)
2126 {
2127         if (wpa_s->drv_priv) {
2128                 wpa_supplicant_deauthenticate(wpa_s,
2129                                               WLAN_REASON_DEAUTH_LEAVING);
2130
2131                 wpa_drv_set_countermeasures(wpa_s, 0);
2132                 wpa_clear_keys(wpa_s, NULL);
2133         }
2134
2135         wpas_notify_iface_removed(wpa_s);
2136
2137         wpa_supplicant_cleanup(wpa_s);
2138
2139         if (wpa_s->drv_priv)
2140                 wpa_drv_deinit(wpa_s);
2141 }
2142
2143
2144 /**
2145  * wpa_supplicant_add_iface - Add a new network interface
2146  * @global: Pointer to global data from wpa_supplicant_init()
2147  * @iface: Interface configuration options
2148  * Returns: Pointer to the created interface or %NULL on failure
2149  *
2150  * This function is used to add new network interfaces for %wpa_supplicant.
2151  * This can be called before wpa_supplicant_run() to add interfaces before the
2152  * main event loop has been started. In addition, new interfaces can be added
2153  * dynamically while %wpa_supplicant is already running. This could happen,
2154  * e.g., when a hotplug network adapter is inserted.
2155  */
2156 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2157                                                  struct wpa_interface *iface)
2158 {
2159         struct wpa_supplicant *wpa_s;
2160         struct wpa_interface t_iface;
2161
2162         if (global == NULL || iface == NULL)
2163                 return NULL;
2164
2165         wpa_s = wpa_supplicant_alloc();
2166         if (wpa_s == NULL)
2167                 return NULL;
2168
2169         t_iface = *iface;
2170         if (global->params.override_driver) {
2171                 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2172                            "('%s' -> '%s')",
2173                            iface->driver, global->params.override_driver);
2174                 t_iface.driver = global->params.override_driver;
2175         }
2176         if (global->params.override_ctrl_interface) {
2177                 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2178                            "ctrl_interface ('%s' -> '%s')",
2179                            iface->ctrl_interface,
2180                            global->params.override_ctrl_interface);
2181                 t_iface.ctrl_interface =
2182                         global->params.override_ctrl_interface;
2183         }
2184         if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2185                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2186                            iface->ifname);
2187                 wpa_supplicant_deinit_iface(wpa_s);
2188                 os_free(wpa_s);
2189                 return NULL;
2190         }
2191
2192         wpa_s->global = global;
2193
2194         /* Notify the control interfaces about new iface */
2195         if (wpas_notify_iface_added(wpa_s)) {
2196                 wpa_supplicant_deinit_iface(wpa_s);
2197                 os_free(wpa_s);
2198                 return NULL;
2199         }
2200
2201         wpa_s->next = global->ifaces;
2202         global->ifaces = wpa_s;
2203
2204         wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2205
2206         return wpa_s;
2207 }
2208
2209
2210 /**
2211  * wpa_supplicant_remove_iface - Remove a network interface
2212  * @global: Pointer to global data from wpa_supplicant_init()
2213  * @wpa_s: Pointer to the network interface to be removed
2214  * Returns: 0 if interface was removed, -1 if interface was not found
2215  *
2216  * This function can be used to dynamically remove network interfaces from
2217  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2218  * addition, this function is used to remove all remaining interfaces when
2219  * %wpa_supplicant is terminated.
2220  */
2221 int wpa_supplicant_remove_iface(struct wpa_global *global,
2222                                 struct wpa_supplicant *wpa_s)
2223 {
2224         struct wpa_supplicant *prev;
2225
2226         /* Remove interface from the global list of interfaces */
2227         prev = global->ifaces;
2228         if (prev == wpa_s) {
2229                 global->ifaces = wpa_s->next;
2230         } else {
2231                 while (prev && prev->next != wpa_s)
2232                         prev = prev->next;
2233                 if (prev == NULL)
2234                         return -1;
2235                 prev->next = wpa_s->next;
2236         }
2237
2238         wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2239
2240         wpa_supplicant_deinit_iface(wpa_s);
2241         os_free(wpa_s);
2242
2243         return 0;
2244 }
2245
2246
2247 /**
2248  * wpa_supplicant_get_iface - Get a new network interface
2249  * @global: Pointer to global data from wpa_supplicant_init()
2250  * @ifname: Interface name
2251  * Returns: Pointer to the interface or %NULL if not found
2252  */
2253 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2254                                                  const char *ifname)
2255 {
2256         struct wpa_supplicant *wpa_s;
2257
2258         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2259                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2260                         return wpa_s;
2261         }
2262         return NULL;
2263 }
2264
2265
2266 /**
2267  * wpa_supplicant_init - Initialize %wpa_supplicant
2268  * @params: Parameters for %wpa_supplicant
2269  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2270  *
2271  * This function is used to initialize %wpa_supplicant. After successful
2272  * initialization, the returned data pointer can be used to add and remove
2273  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2274  */
2275 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2276 {
2277         struct wpa_global *global;
2278         int ret, i;
2279
2280         if (params == NULL)
2281                 return NULL;
2282
2283         wpa_debug_open_file(params->wpa_debug_file_path);
2284         if (params->wpa_debug_syslog)
2285                 wpa_debug_open_syslog();
2286
2287         ret = eap_peer_register_methods();
2288         if (ret) {
2289                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2290                 if (ret == -2)
2291                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2292                                    "the same EAP type.");
2293                 return NULL;
2294         }
2295
2296 #ifdef CONFIG_AP
2297         ret = eap_server_register_methods();
2298         if (ret) {
2299                 wpa_printf(MSG_ERROR, "Failed to register EAP server methods");
2300                 if (ret == -2)
2301                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2302                                    "the same EAP type.");
2303                 return NULL;
2304         }
2305 #endif /* CONFIG_AP */
2306
2307         global = os_zalloc(sizeof(*global));
2308         if (global == NULL)
2309                 return NULL;
2310         global->params.daemonize = params->daemonize;
2311         global->params.wait_for_monitor = params->wait_for_monitor;
2312         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2313         if (params->pid_file)
2314                 global->params.pid_file = os_strdup(params->pid_file);
2315         if (params->ctrl_interface)
2316                 global->params.ctrl_interface =
2317                         os_strdup(params->ctrl_interface);
2318         if (params->override_driver)
2319                 global->params.override_driver =
2320                         os_strdup(params->override_driver);
2321         if (params->override_ctrl_interface)
2322                 global->params.override_ctrl_interface =
2323                         os_strdup(params->override_ctrl_interface);
2324         wpa_debug_level = global->params.wpa_debug_level =
2325                 params->wpa_debug_level;
2326         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2327                 params->wpa_debug_show_keys;
2328         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2329                 params->wpa_debug_timestamp;
2330
2331         if (eloop_init(global)) {
2332                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2333                 wpa_supplicant_deinit(global);
2334                 return NULL;
2335         }
2336
2337         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2338         if (global->ctrl_iface == NULL) {
2339                 wpa_supplicant_deinit(global);
2340                 return NULL;
2341         }
2342
2343         if (wpas_notify_supplicant_initialized(global)) {
2344                 wpa_supplicant_deinit(global);
2345                 return NULL;
2346         }
2347
2348         for (i = 0; wpa_drivers[i]; i++)
2349                 global->drv_count++;
2350         if (global->drv_count == 0) {
2351                 wpa_printf(MSG_ERROR, "No drivers enabled");
2352                 wpa_supplicant_deinit(global);
2353                 return NULL;
2354         }
2355         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2356         if (global->drv_priv == NULL) {
2357                 wpa_supplicant_deinit(global);
2358                 return NULL;
2359         }
2360         for (i = 0; wpa_drivers[i]; i++) {
2361                 if (!wpa_drivers[i]->global_init)
2362                         continue;
2363                 global->drv_priv[i] = wpa_drivers[i]->global_init();
2364                 if (global->drv_priv[i] == NULL) {
2365                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
2366                                    "'%s'", wpa_drivers[i]->name);
2367                         wpa_supplicant_deinit(global);
2368                         return NULL;
2369                 }
2370         }
2371
2372         return global;
2373 }
2374
2375
2376 /**
2377  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2378  * @global: Pointer to global data from wpa_supplicant_init()
2379  * Returns: 0 after successful event loop run, -1 on failure
2380  *
2381  * This function starts the main event loop and continues running as long as
2382  * there are any remaining events. In most cases, this function is running as
2383  * long as the %wpa_supplicant process in still in use.
2384  */
2385 int wpa_supplicant_run(struct wpa_global *global)
2386 {
2387         struct wpa_supplicant *wpa_s;
2388
2389         if (global->params.daemonize &&
2390             wpa_supplicant_daemon(global->params.pid_file))
2391                 return -1;
2392
2393         if (global->params.wait_for_monitor) {
2394                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2395                         if (wpa_s->ctrl_iface)
2396                                 wpa_supplicant_ctrl_iface_wait(
2397                                         wpa_s->ctrl_iface);
2398         }
2399
2400         eloop_register_signal_terminate(wpa_supplicant_terminate, NULL);
2401         eloop_register_signal_reconfig(wpa_supplicant_reconfig, NULL);
2402
2403         eloop_run();
2404
2405         return 0;
2406 }
2407
2408
2409 /**
2410  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2411  * @global: Pointer to global data from wpa_supplicant_init()
2412  *
2413  * This function is called to deinitialize %wpa_supplicant and to free all
2414  * allocated resources. Remaining network interfaces will also be removed.
2415  */
2416 void wpa_supplicant_deinit(struct wpa_global *global)
2417 {
2418         int i;
2419
2420         if (global == NULL)
2421                 return;
2422
2423         while (global->ifaces)
2424                 wpa_supplicant_remove_iface(global, global->ifaces);
2425
2426         if (global->ctrl_iface)
2427                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2428
2429         wpas_notify_supplicant_deinitialized(global);
2430
2431         eap_peer_unregister_methods();
2432 #ifdef CONFIG_AP
2433         eap_server_unregister_methods();
2434 #endif /* CONFIG_AP */
2435
2436         for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2437                 if (!global->drv_priv[i])
2438                         continue;
2439                 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2440         }
2441         os_free(global->drv_priv);
2442
2443         eloop_destroy();
2444
2445         if (global->params.pid_file) {
2446                 os_daemonize_terminate(global->params.pid_file);
2447                 os_free(global->params.pid_file);
2448         }
2449         os_free(global->params.ctrl_interface);
2450         os_free(global->params.override_driver);
2451         os_free(global->params.override_ctrl_interface);
2452
2453         os_free(global);
2454         wpa_debug_close_syslog();
2455         wpa_debug_close_file();
2456 }