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 == IEEE80211_MODE_AP) {
 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             ssid->mode == IEEE80211_MODE_INFRA) {
 992                 sme_authenticate(wpa_s, bss, ssid);
 993                 return;
 994         }
 995
 996         wpa_s->reassociate = 0;
 997         if (bss) {
 998 #ifdef CONFIG_IEEE80211R
 999                 const u8 *md = NULL;
1000 #endif /* CONFIG_IEEE80211R */
1001                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1002                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1003                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1004                         ie ? wpa_ssid_txt(ie + 2, ie[1]) : "", bss->freq);
1005                 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1006                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1007                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1008                 if (bssid_changed)
1009                         wpas_notify_bssid_changed(wpa_s);
1010 #ifdef CONFIG_IEEE80211R
1011                 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1012                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1013                         md = ie + 2;
1014                 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
1015                 if (md) {
1016                         /* Prepare for the next transition */
1017                         wpa_ft_prepare_auth_request(wpa_s->wpa);
1018                 }
1019 #endif /* CONFIG_IEEE80211R */
1020 #ifdef CONFIG_WPS
1021         } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1022                    wpa_s->conf->ap_scan == 2 &&
1023                    (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1024                 /* Use ap_scan==1 style network selection to find the network
1025                  */
1026                 wpa_s->scan_req = 2;
1027                 wpa_s->reassociate = 1;
1028                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1029                 return;
1030 #endif /* CONFIG_WPS */
1031         } else {
1032                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1033                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1034                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1035         }
1036         wpa_supplicant_cancel_scan(wpa_s);
1037
1038         /* Starting new association, so clear the possibly used WPA IE from the
1039          * previous association. */
1040         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1041
1042 #ifdef IEEE8021X_EAPOL
1043         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1044                 if (ssid->leap) {
1045                         if (ssid->non_leap == 0)
1046                                 algs = AUTH_ALG_LEAP;
1047                         else
1048                                 algs |= AUTH_ALG_LEAP;
1049                 }
1050         }
1051 #endif /* IEEE8021X_EAPOL */
1052         wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1053         if (ssid->auth_alg) {
1054                 algs = 0;
1055                 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
1056                         algs |= AUTH_ALG_OPEN_SYSTEM;
1057                 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
1058                         algs |= AUTH_ALG_SHARED_KEY;
1059                 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
1060                         algs |= AUTH_ALG_LEAP;
1061                 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
1062                            algs);
1063         }
1064
1065         if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1066                     wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
1067             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1068                                WPA_KEY_MGMT_FT_IEEE8021X |
1069                                WPA_KEY_MGMT_FT_PSK |
1070                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
1071                                WPA_KEY_MGMT_PSK_SHA256))) {
1072                 int try_opportunistic;
1073                 try_opportunistic = ssid->proactive_key_caching &&
1074                         (ssid->proto & WPA_PROTO_RSN);
1075                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1076                                             wpa_s->current_ssid,
1077                                             try_opportunistic) == 0)
1078                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1079                 wpa_ie_len = sizeof(wpa_ie);
1080                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1081                                               wpa_ie, &wpa_ie_len)) {
1082                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1083                                    "management and encryption suites");
1084                         return;
1085                 }
1086         } else if (ssid->key_mgmt &
1087                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1088                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1089                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1090                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1091                 wpa_ie_len = sizeof(wpa_ie);
1092                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1093                                               wpa_ie, &wpa_ie_len)) {
1094                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1095                                    "management and encryption suites (no scan "
1096                                    "results)");
1097                         return;
1098                 }
1099 #ifdef CONFIG_WPS
1100         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1101                 struct wpabuf *wps_ie;
1102                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1103                 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1104                         wpa_ie_len = wpabuf_len(wps_ie);
1105                         os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1106                 } else
1107                         wpa_ie_len = 0;
1108                 wpabuf_free(wps_ie);
1109                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1110 #endif /* CONFIG_WPS */
1111         } else {
1112                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1113                 wpa_ie_len = 0;
1114         }
1115
1116         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1117         use_crypt = 1;
1118         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1119         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1120         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1121             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1122                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1123                         use_crypt = 0;
1124                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1125                         use_crypt = 1;
1126                         wep_keys_set = 1;
1127                 }
1128         }
1129         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1130                 use_crypt = 0;
1131
1132 #ifdef IEEE8021X_EAPOL
1133         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1134                 if ((ssid->eapol_flags &
1135                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1136                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1137                     !wep_keys_set) {
1138                         use_crypt = 0;
1139                 } else {
1140                         /* Assume that dynamic WEP-104 keys will be used and
1141                          * set cipher suites in order for drivers to expect
1142                          * encryption. */
1143                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1144                 }
1145         }
1146 #endif /* IEEE8021X_EAPOL */
1147
1148         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1149                 /* Set the key before (and later after) association */
1150                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1151         }
1152
1153         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1154         os_memset(&params, 0, sizeof(params));
1155         if (bss) {
1156                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1157                 params.bssid = bss->bssid;
1158                 params.ssid = ie ? ie + 2 : (u8 *) "";
1159                 params.ssid_len = ie ? ie[1] : 0;
1160                 params.freq = bss->freq;
1161         } else {
1162                 params.ssid = ssid->ssid;
1163                 params.ssid_len = ssid->ssid_len;
1164         }
1165         if (ssid->mode == 1 && ssid->frequency > 0 && params.freq == 0)
1166                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1167         params.wpa_ie = wpa_ie;
1168         params.wpa_ie_len = wpa_ie_len;
1169         params.pairwise_suite = cipher_pairwise;
1170         params.group_suite = cipher_group;
1171         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1172         params.auth_alg = algs;
1173         params.mode = ssid->mode;
1174         for (i = 0; i < NUM_WEP_KEYS; i++) {
1175                 if (ssid->wep_key_len[i])
1176                         params.wep_key[i] = ssid->wep_key[i];
1177                 params.wep_key_len[i] = ssid->wep_key_len[i];
1178         }
1179         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1180
1181         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1182             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1183              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1184                 params.passphrase = ssid->passphrase;
1185                 if (ssid->psk_set)
1186                         params.psk = ssid->psk;
1187         }
1188
1189         params.drop_unencrypted = use_crypt;
1190
1191 #ifdef CONFIG_IEEE80211W
1192         switch (ssid->ieee80211w) {
1193         case NO_IEEE80211W:
1194                 params.mgmt_frame_protection = NO_MGMT_FRAME_PROTECTION;
1195                 break;
1196         case IEEE80211W_OPTIONAL:
1197                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_OPTIONAL;
1198                 break;
1199         case IEEE80211W_REQUIRED:
1200                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_REQUIRED;
1201                 break;
1202         }
1203         if (ssid->ieee80211w != NO_IEEE80211W && bss) {
1204                 const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
1205                 struct wpa_ie_data ie;
1206                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1207                     ie.capabilities &
1208                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1209                         wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
1210                                    "require MFP");
1211                         params.mgmt_frame_protection =
1212                                 MGMT_FRAME_PROTECTION_REQUIRED;
1213                 }
1214         }
1215 #endif /* CONFIG_IEEE80211W */
1216
1217         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1218                 ret = ieee80211_sta_associate(wpa_s, &params);
1219         else
1220                 ret = wpa_drv_associate(wpa_s, &params);
1221         if (ret < 0) {
1222                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1223                         "failed");
1224                 /* try to continue anyway; new association will be tried again
1225                  * after timeout */
1226                 assoc_failed = 1;
1227         }
1228
1229         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1230                 /* Set the key after the association just in case association
1231                  * cleared the previously configured key. */
1232                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1233                 /* No need to timeout authentication since there is no key
1234                  * management. */
1235                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1236                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1237 #ifdef CONFIG_IBSS_RSN
1238         } else if (ssid->mode == IEEE80211_MODE_IBSS &&
1239                    wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1240                    wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1241                 ibss_rsn_set_psk(wpa_s->ibss_rsn, ssid->psk);
1242                 /*
1243                  * RSN IBSS authentication is per-STA and we can disable the
1244                  * per-BSSID authentication.
1245                  */
1246                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1247                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1248 #endif /* CONFIG_IBSS_RSN */
1249         } else {
1250                 /* Timeout for IEEE 802.11 authentication and association */
1251                 int timeout = 60;
1252
1253                 if (assoc_failed) {
1254                         /* give IBSS a bit more time */
1255                         timeout = ssid->mode ? 10 : 5;
1256                 } else if (wpa_s->conf->ap_scan == 1) {
1257                         /* give IBSS a bit more time */
1258                         timeout = ssid->mode ? 20 : 10;
1259                 }
1260                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1261         }
1262
1263         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1264             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1265                 /* Set static WEP keys again */
1266                 wpa_set_wep_keys(wpa_s, ssid);
1267         }
1268
1269         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1270                 /*
1271                  * Do not allow EAP session resumption between different
1272                  * network configurations.
1273                  */
1274                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1275         }
1276         old_ssid = wpa_s->current_ssid;
1277         wpa_s->current_ssid = ssid;
1278         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1279         wpa_supplicant_initiate_eapol(wpa_s);
1280         if (old_ssid != wpa_s->current_ssid)
1281                 wpas_notify_network_changed(wpa_s);
1282 }
1283
1284
1285 /**
1286  * wpa_supplicant_disassociate - Disassociate the current connection
1287  * @wpa_s: Pointer to wpa_supplicant data
1288  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1289  *
1290  * This function is used to request %wpa_supplicant to disassociate with the
1291  * current AP.
1292  */
1293 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1294                                  int reason_code)
1295 {
1296         struct wpa_ssid *old_ssid;
1297         u8 *addr = NULL;
1298
1299         if (!is_zero_ether_addr(wpa_s->bssid)) {
1300                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1301                         ieee80211_sta_disassociate(wpa_s, reason_code);
1302                 else
1303                         wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1304                 addr = wpa_s->bssid;
1305         }
1306         wpa_clear_keys(wpa_s, addr);
1307         wpa_supplicant_mark_disassoc(wpa_s);
1308         old_ssid = wpa_s->current_ssid;
1309         wpa_s->current_ssid = NULL;
1310         wpa_sm_set_config(wpa_s->wpa, NULL);
1311         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1312         if (old_ssid != wpa_s->current_ssid)
1313                 wpas_notify_network_changed(wpa_s);
1314 }
1315
1316
1317 /**
1318  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1319  * @wpa_s: Pointer to wpa_supplicant data
1320  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1321  *
1322  * This function is used to request %wpa_supplicant to deauthenticate from the
1323  * current AP.
1324  */
1325 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1326                                    int reason_code)
1327 {
1328         struct wpa_ssid *old_ssid;
1329         u8 *addr = NULL;
1330
1331         if (!is_zero_ether_addr(wpa_s->bssid)) {
1332                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1333                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1334                 else
1335                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1336                                                reason_code);
1337                 addr = wpa_s->bssid;
1338         }
1339         wpa_clear_keys(wpa_s, addr);
1340         wpa_supplicant_mark_disassoc(wpa_s);
1341         old_ssid = wpa_s->current_ssid;
1342         wpa_s->current_ssid = NULL;
1343         wpa_sm_set_config(wpa_s->wpa, NULL);
1344         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1345         if (old_ssid != wpa_s->current_ssid)
1346                 wpas_notify_network_changed(wpa_s);
1347 }
1348
1349
1350 /**
1351  * wpa_supplicant_enable_network - Mark a configured network as enabled
1352  * @wpa_s: wpa_supplicant structure for a network interface
1353  * @ssid: wpa_ssid structure for a configured network or %NULL
1354  *
1355  * Enables the specified network or all networks if no network specified.
1356  */
1357 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1358                                    struct wpa_ssid *ssid)
1359 {
1360         struct wpa_ssid *other_ssid;
1361         int was_disabled;
1362
1363         if (ssid == NULL) {
1364                 other_ssid = wpa_s->conf->ssid;
1365                 while (other_ssid) {
1366                         if (other_ssid == wpa_s->current_ssid &&
1367                             other_ssid->disabled)
1368                                 wpa_s->reassociate = 1;
1369
1370                         was_disabled = other_ssid->disabled;
1371
1372                         other_ssid->disabled = 0;
1373
1374                         if (was_disabled != other_ssid->disabled)
1375                                 wpas_notify_network_enabled_changed(
1376                                         wpa_s, other_ssid);
1377
1378                         other_ssid = other_ssid->next;
1379                 }
1380                 if (wpa_s->reassociate)
1381                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1382         } else if (wpa_s->current_ssid == NULL && ssid->disabled) {
1383                 /*
1384                  * Try to reassociate since there is no current configuration
1385                  * and a new network was made available.
1386                  */
1387                 wpa_s->reassociate = 1;
1388                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1389
1390                 was_disabled = ssid->disabled;
1391
1392                 ssid->disabled = 0;
1393
1394                 if (was_disabled != ssid->disabled)
1395                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1396         }
1397 }
1398
1399
1400 /**
1401  * wpa_supplicant_disable_network - Mark a configured network as disabled
1402  * @wpa_s: wpa_supplicant structure for a network interface
1403  * @ssid: wpa_ssid structure for a configured network or %NULL
1404  *
1405  * Disables the specified network or all networks if no network specified.
1406  */
1407 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1408                                     struct wpa_ssid *ssid)
1409 {
1410         struct wpa_ssid *other_ssid;
1411         int was_disabled;
1412
1413         if (ssid == NULL) {
1414                 other_ssid = wpa_s->conf->ssid;
1415                 while (other_ssid) {
1416                         was_disabled = other_ssid->disabled;
1417
1418                         other_ssid->disabled = 1;
1419
1420                         if (was_disabled != other_ssid->disabled)
1421                                 wpas_notify_network_enabled_changed(
1422                                         wpa_s, other_ssid);
1423
1424                         other_ssid = other_ssid->next;
1425                 }
1426                 if (wpa_s->current_ssid)
1427                         wpa_supplicant_disassociate(
1428                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1429         } else {
1430                 if (ssid == wpa_s->current_ssid)
1431                         wpa_supplicant_disassociate(
1432                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1433
1434                 was_disabled = ssid->disabled;
1435
1436                 ssid->disabled = 1;
1437
1438                 if (was_disabled != ssid->disabled)
1439                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1440         }
1441 }
1442
1443
1444 /**
1445  * wpa_supplicant_select_network - Attempt association with a network
1446  * @wpa_s: wpa_supplicant structure for a network interface
1447  * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1448  */
1449 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1450                                    struct wpa_ssid *ssid)
1451 {
1452
1453         struct wpa_ssid *other_ssid;
1454
1455         if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1456                 wpa_supplicant_disassociate(
1457                         wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1458
1459         /*
1460          * Mark all other networks disabled or mark all networks enabled if no
1461          * network specified.
1462          */
1463         other_ssid = wpa_s->conf->ssid;
1464         while (other_ssid) {
1465                 int was_disabled = other_ssid->disabled;
1466
1467                 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1468
1469                 if (was_disabled != other_ssid->disabled)
1470                         wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1471
1472                 other_ssid = other_ssid->next;
1473         }
1474         wpa_s->disconnected = 0;
1475         wpa_s->reassociate = 1;
1476         wpa_supplicant_req_scan(wpa_s, 0, 0);
1477
1478         if (ssid)
1479                 wpas_notify_network_selected(wpa_s, ssid);
1480 }
1481
1482
1483 /**
1484  * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1485  * @wpa_s: wpa_supplicant structure for a network interface
1486  * @ap_scan: AP scan mode
1487  * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1488  *
1489  */
1490 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1491 {
1492
1493         int old_ap_scan;
1494
1495         if (ap_scan < 0 || ap_scan > 2)
1496                 return -1;
1497
1498         old_ap_scan = wpa_s->conf->ap_scan;
1499         wpa_s->conf->ap_scan = ap_scan;
1500
1501         if (old_ap_scan != wpa_s->conf->ap_scan)
1502                 wpas_notify_ap_scan_changed(wpa_s);
1503
1504         return 0;
1505 }
1506
1507
1508 /**
1509  * wpa_supplicant_set_debug_params - Set global debug params
1510  * @global: wpa_global structure
1511  * @debug_level: debug level
1512  * @debug_timestamp: determines if show timestamp in debug data
1513  * @debug_show_keys: determines if show keys in debug data
1514  * Returns: 0 if succeed or -1 if debug_level has wrong value
1515  */
1516 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1517                                     int debug_timestamp, int debug_show_keys)
1518 {
1519
1520         int old_level, old_timestamp, old_show_keys;
1521
1522         /* check for allowed debuglevels */
1523         if (debug_level != MSG_MSGDUMP &&
1524             debug_level != MSG_DEBUG &&
1525             debug_level != MSG_INFO &&
1526             debug_level != MSG_WARNING &&
1527             debug_level != MSG_ERROR)
1528                 return -1;
1529
1530         old_level = wpa_debug_level;
1531         old_timestamp = wpa_debug_timestamp;
1532         old_show_keys = wpa_debug_show_keys;
1533
1534         wpa_debug_level = debug_level;
1535         wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1536         wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1537
1538         if (wpa_debug_level != old_level ||
1539             wpa_debug_timestamp != old_timestamp ||
1540             wpa_debug_show_keys != old_show_keys)
1541                 wpas_notify_debug_params_changed(global);
1542
1543         return 0;
1544 }
1545
1546
1547 static void notify_bss_changes(struct wpa_supplicant *wpa_s,
1548                                u8 (*prev_bssids)[ETH_ALEN], int prev_num,
1549                                struct wpa_scan_results *new)
1550 {
1551         int new_num, i, j;
1552
1553         new_num = new != NULL ? new->num : 0;
1554         if (prev_bssids == NULL)
1555                 prev_num = 0;
1556
1557         for (i = 0; i < prev_num; i++) {
1558                 for (j = 0; j < new_num; j++) {
1559                         if (!os_memcmp(prev_bssids[i], new->res[j]->bssid,
1560                                        ETH_ALEN))
1561                                 break;
1562                 }
1563                 if (j == new_num)
1564                         wpas_notify_bss_removed(wpa_s, prev_bssids[i]);
1565         }
1566         for (i = 0; i < new_num; i++) {
1567                 for (j = 0; j < prev_num; j++) {
1568                         if (!os_memcmp(new->res[i]->bssid, prev_bssids[j],
1569                                        ETH_ALEN))
1570                                 break;
1571                 }
1572                 if (j == prev_num)
1573                         wpas_notify_bss_added(wpa_s, new->res[i]->bssid);
1574         }
1575 }
1576
1577
1578 /**
1579  * wpa_supplicant_get_scan_results - Get scan results
1580  * @wpa_s: Pointer to wpa_supplicant data
1581  * Returns: 0 on success, -1 on failure
1582  *
1583  * This function is request the current scan results from the driver and stores
1584  * a local copy of the results in wpa_s->scan_res.
1585  */
1586 int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s)
1587 {
1588         int ret, i, prev_scan_res_num;
1589         u8 (*prev_scan_bssids)[ETH_ALEN];
1590
1591         prev_scan_res_num = wpa_s->scan_res ? wpa_s->scan_res->num : 0;
1592         prev_scan_bssids = os_malloc(prev_scan_res_num * ETH_ALEN);
1593
1594         if (prev_scan_bssids) {
1595                 for (i = 0; i < prev_scan_res_num; i++) {
1596                         os_memcpy(prev_scan_bssids[i],
1597                                   wpa_s->scan_res->res[i]->bssid, ETH_ALEN);
1598                 }
1599         } else {
1600                 wpa_printf(MSG_WARNING, "Not enough memory for old scan "
1601                            "results list");
1602                 prev_scan_res_num = 0;
1603         }
1604
1605         wpa_scan_results_free(wpa_s->scan_res);
1606         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1607                 wpa_s->scan_res = ieee80211_sta_get_scan_results(wpa_s);
1608         else
1609                 wpa_s->scan_res = wpa_drv_get_scan_results2(wpa_s);
1610         if (wpa_s->scan_res == NULL) {
1611                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1612                 ret = -1;
1613         } else {
1614                 ret = 0;
1615                 wpa_scan_sort_results(wpa_s->scan_res);
1616         }
1617
1618         notify_bss_changes(wpa_s, prev_scan_bssids, prev_scan_res_num,
1619                            wpa_s->scan_res);
1620         os_free(prev_scan_bssids);
1621
1622         return ret;
1623 }
1624
1625
1626 /**
1627  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1628  * @wpa_s: Pointer to wpa_supplicant data
1629  * Returns: A pointer to the current network structure or %NULL on failure
1630  */
1631 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1632 {
1633         struct wpa_ssid *entry;
1634         u8 ssid[MAX_SSID_LEN];
1635         int res;
1636         size_t ssid_len;
1637         u8 bssid[ETH_ALEN];
1638         int wired;
1639
1640         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1641                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1642                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1643                                    "MLME.");
1644                         return NULL;
1645                 }
1646         } else {
1647                 res = wpa_drv_get_ssid(wpa_s, ssid);
1648                 if (res < 0) {
1649                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1650                                    "driver.");
1651                         return NULL;
1652                 }
1653                 ssid_len = res;
1654         }
1655
1656         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1657                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1658         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1659                 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1660                 return NULL;
1661         }
1662
1663         wired = wpa_s->conf->ap_scan == 0 &&
1664                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1665
1666         entry = wpa_s->conf->ssid;
1667         while (entry) {
1668                 if (!entry->disabled &&
1669                     ((ssid_len == entry->ssid_len &&
1670                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1671                     (!entry->bssid_set ||
1672                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1673                         return entry;
1674 #ifdef CONFIG_WPS
1675                 if (!entry->disabled &&
1676                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1677                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1678                     (!entry->bssid_set ||
1679                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1680                         return entry;
1681 #endif /* CONFIG_WPS */
1682                 entry = entry->next;
1683         }
1684
1685         return NULL;
1686 }
1687
1688
1689 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1690                                      const char *name)
1691 {
1692         int i;
1693         size_t len;
1694         const char *pos;
1695
1696         if (wpa_s == NULL)
1697                 return -1;
1698
1699         if (wpa_drivers[0] == NULL) {
1700                 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1701                            "wpa_supplicant.");
1702                 return -1;
1703         }
1704
1705         if (name == NULL) {
1706                 /* default to first driver in the list */
1707                 wpa_s->driver = wpa_drivers[0];
1708                 wpa_s->global_drv_priv = wpa_s->global->drv_priv[0];
1709                 return 0;
1710         }
1711
1712         pos = os_strchr(name, ',');
1713         if (pos)
1714                 len = pos - name;
1715         else
1716                 len = os_strlen(name);
1717         for (i = 0; wpa_drivers[i]; i++) {
1718                 if (os_strlen(wpa_drivers[i]->name) == len &&
1719                     os_strncmp(name, wpa_drivers[i]->name, len) ==
1720                     0) {
1721                         wpa_s->driver = wpa_drivers[i];
1722                         wpa_s->global_drv_priv = wpa_s->global->drv_priv[i];
1723                         return 0;
1724                 }
1725         }
1726
1727         wpa_printf(MSG_ERROR, "Unsupported driver '%s'.", name);
1728         return -1;
1729 }
1730
1731
1732 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1733                              const u8 *buf, size_t len)
1734 {
1735         struct wpa_supplicant *wpa_s = ctx;
1736
1737         wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1738         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1739
1740         if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1741                 /*
1742                  * There is possible race condition between receiving the
1743                  * association event and the EAPOL frame since they are coming
1744                  * through different paths from the driver. In order to avoid
1745                  * issues in trying to process the EAPOL frame before receiving
1746                  * association information, lets queue it for processing until
1747                  * the association event is received.
1748                  */
1749                 wpa_printf(MSG_DEBUG, "Not associated - Delay processing of "
1750                            "received EAPOL frame");
1751                 wpabuf_free(wpa_s->pending_eapol_rx);
1752                 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1753                 if (wpa_s->pending_eapol_rx) {
1754                         os_get_time(&wpa_s->pending_eapol_rx_time);
1755                         os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1756                                   ETH_ALEN);
1757                 }
1758                 return;
1759         }
1760
1761 #ifdef CONFIG_AP
1762         if (wpa_s->ap_iface) {
1763                 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
1764                 return;
1765         }
1766 #endif /* CONFIG_AP */
1767
1768         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1769                 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1770                            "no key management is configured");
1771                 return;
1772         }
1773
1774         if (wpa_s->eapol_received == 0 &&
1775             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1776              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1777              wpa_s->wpa_state != WPA_COMPLETED)) {
1778                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1779                 wpa_supplicant_req_auth_timeout(
1780                         wpa_s,
1781                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1782                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1783                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1784                         70 : 10, 0);
1785         }
1786         wpa_s->eapol_received++;
1787
1788         if (wpa_s->countermeasures) {
1789                 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1790                            "packet");
1791                 return;
1792         }
1793
1794 #ifdef CONFIG_IBSS_RSN
1795         if (wpa_s->current_ssid &&
1796             wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS) {
1797                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1798                 return;
1799         }
1800 #endif /* CONFIG_IBSS_RSN */
1801
1802         /* Source address of the incoming EAPOL frame could be compared to the
1803          * current BSSID. However, it is possible that a centralized
1804          * Authenticator could be using another MAC address than the BSSID of
1805          * an AP, so just allow any address to be used for now. The replies are
1806          * still sent to the current BSSID (if available), though. */
1807
1808         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1809         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1810             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1811                 return;
1812         wpa_drv_poll(wpa_s);
1813         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1814                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1815         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1816                 /*
1817                  * Set portValid = TRUE here since we are going to skip 4-way
1818                  * handshake processing which would normally set portValid. We
1819                  * need this to allow the EAPOL state machines to be completed
1820                  * without going through EAPOL-Key handshake.
1821                  */
1822                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1823         }
1824 }
1825
1826
1827 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1828                            struct ieee80211_rx_status *rx_status)
1829 {
1830         struct wpa_supplicant *wpa_s = ctx;
1831         ieee80211_sta_rx(wpa_s, buf, len, rx_status);
1832 }
1833
1834
1835 /**
1836  * wpa_supplicant_driver_init - Initialize driver interface parameters
1837  * @wpa_s: Pointer to wpa_supplicant data
1838  * Returns: 0 on success, -1 on failure
1839  *
1840  * This function is called to initialize driver interface parameters.
1841  * wpa_drv_init() must have been called before this function to initialize the
1842  * driver interface.
1843  */
1844 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1845 {
1846         static int interface_count = 0;
1847
1848         if (wpa_s->driver->send_eapol) {
1849                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1850                 if (addr)
1851                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1852         } else {
1853                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1854                                            wpa_drv_get_mac_addr(wpa_s),
1855                                            ETH_P_EAPOL,
1856                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1857                 if (wpa_s->l2 == NULL)
1858                         return -1;
1859         }
1860
1861         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1862                 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1863                 return -1;
1864         }
1865
1866         wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1867                    MAC2STR(wpa_s->own_addr));
1868
1869         if (wpa_s->bridge_ifname[0]) {
1870                 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1871                            " '%s'", wpa_s->bridge_ifname);
1872                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1873                                               wpa_s->own_addr,
1874                                               ETH_P_EAPOL,
1875                                               wpa_supplicant_rx_eapol, wpa_s,
1876                                               0);
1877                 if (wpa_s->l2_br == NULL) {
1878                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1879                                    "connection for the bridge interface '%s'",
1880                                    wpa_s->bridge_ifname);
1881                         return -1;
1882                 }
1883         }
1884
1885         wpa_clear_keys(wpa_s, NULL);
1886
1887         /* Make sure that TKIP countermeasures are not left enabled (could
1888          * happen if wpa_supplicant is killed during countermeasures. */
1889         wpa_drv_set_countermeasures(wpa_s, 0);
1890
1891         wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1892         wpa_drv_flush_pmkid(wpa_s);
1893
1894         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1895         wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1896         interface_count++;
1897
1898         return 0;
1899 }
1900
1901
1902 static int wpa_supplicant_daemon(const char *pid_file)
1903 {
1904         wpa_printf(MSG_DEBUG, "Daemonize..");
1905         return os_daemonize(pid_file);
1906 }
1907
1908
1909 static struct wpa_supplicant * wpa_supplicant_alloc(void)
1910 {
1911         struct wpa_supplicant *wpa_s;
1912
1913         wpa_s = os_zalloc(sizeof(*wpa_s));
1914         if (wpa_s == NULL)
1915                 return NULL;
1916         wpa_s->scan_req = 1;
1917
1918         return wpa_s;
1919 }
1920
1921
1922 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
1923                                      struct wpa_interface *iface)
1924 {
1925         const char *ifname, *driver;
1926         struct wpa_driver_capa capa;
1927
1928         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
1929                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
1930                    iface->confname ? iface->confname : "N/A",
1931                    iface->driver ? iface->driver : "default",
1932                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
1933                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
1934
1935         if (iface->confname) {
1936 #ifdef CONFIG_BACKEND_FILE
1937                 wpa_s->confname = os_rel2abs_path(iface->confname);
1938                 if (wpa_s->confname == NULL) {
1939                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
1940                                    "for configuration file '%s'.",
1941                                    iface->confname);
1942                         return -1;
1943                 }
1944                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
1945                            iface->confname, wpa_s->confname);
1946 #else /* CONFIG_BACKEND_FILE */
1947                 wpa_s->confname = os_strdup(iface->confname);
1948 #endif /* CONFIG_BACKEND_FILE */
1949                 wpa_s->conf = wpa_config_read(wpa_s->confname);
1950                 if (wpa_s->conf == NULL) {
1951                         wpa_printf(MSG_ERROR, "Failed to read or parse "
1952                                    "configuration '%s'.", wpa_s->confname);
1953                         return -1;
1954                 }
1955
1956                 /*
1957                  * Override ctrl_interface and driver_param if set on command
1958                  * line.
1959                  */
1960                 if (iface->ctrl_interface) {
1961                         os_free(wpa_s->conf->ctrl_interface);
1962                         wpa_s->conf->ctrl_interface =
1963                                 os_strdup(iface->ctrl_interface);
1964                 }
1965
1966                 if (iface->driver_param) {
1967                         os_free(wpa_s->conf->driver_param);
1968                         wpa_s->conf->driver_param =
1969                                 os_strdup(iface->driver_param);
1970                 }
1971         } else
1972                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
1973                                                      iface->driver_param);
1974
1975         if (wpa_s->conf == NULL) {
1976                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
1977                 return -1;
1978         }
1979
1980         if (iface->ifname == NULL) {
1981                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
1982                 return -1;
1983         }
1984         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
1985                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
1986                            iface->ifname);
1987                 return -1;
1988         }
1989         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
1990
1991         if (iface->bridge_ifname) {
1992                 if (os_strlen(iface->bridge_ifname) >=
1993                     sizeof(wpa_s->bridge_ifname)) {
1994                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
1995                                    "name '%s'.", iface->bridge_ifname);
1996                         return -1;
1997                 }
1998                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
1999                            sizeof(wpa_s->bridge_ifname));
2000         }
2001
2002         /* RSNA Supplicant Key Management - INITIALIZE */
2003         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2004         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2005
2006         /* Initialize driver interface and register driver event handler before
2007          * L2 receive handler so that association events are processed before
2008          * EAPOL-Key packets if both become available for the same select()
2009          * call. */
2010         driver = iface->driver;
2011 next_driver:
2012         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2013                 return -1;
2014
2015         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2016         if (wpa_s->drv_priv == NULL) {
2017                 const char *pos;
2018                 pos = os_strchr(driver, ',');
2019                 if (pos) {
2020                         wpa_printf(MSG_DEBUG, "Failed to initialize driver "
2021                                    "interface - try next driver wrapper");
2022                         driver = pos + 1;
2023                         goto next_driver;
2024                 }
2025                 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
2026                 return -1;
2027         }
2028         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2029                 wpa_printf(MSG_ERROR, "Driver interface rejected "
2030                            "driver_param '%s'", wpa_s->conf->driver_param);
2031                 return -1;
2032         }
2033
2034         ifname = wpa_drv_get_ifname(wpa_s);
2035         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2036                 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
2037                            "name with '%s'", ifname);
2038                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2039         }
2040
2041         if (wpa_supplicant_init_wpa(wpa_s) < 0)
2042                 return -1;
2043
2044         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2045                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2046                           NULL);
2047         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2048
2049         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2050             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2051                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2052                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2053                            "dot11RSNAConfigPMKLifetime");
2054                 return -1;
2055         }
2056
2057         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2058             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2059                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2060                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2061                         "dot11RSNAConfigPMKReauthThreshold");
2062                 return -1;
2063         }
2064
2065         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2066             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2067                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
2068                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2069                            "dot11RSNAConfigSATimeout");
2070                 return -1;
2071         }
2072
2073         if (wpa_supplicant_driver_init(wpa_s) < 0)
2074                 return -1;
2075
2076         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2077             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2078                 wpa_printf(MSG_DEBUG, "Failed to set country");
2079                 return -1;
2080         }
2081
2082         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2083
2084         if (wpas_wps_init(wpa_s))
2085                 return -1;
2086
2087         if (wpa_supplicant_init_eapol(wpa_s) < 0)
2088                 return -1;
2089         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2090
2091         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2092         if (wpa_s->ctrl_iface == NULL) {
2093                 wpa_printf(MSG_ERROR,
2094                            "Failed to initialize control interface '%s'.\n"
2095                            "You may have another wpa_supplicant process "
2096                            "already running or the file was\n"
2097                            "left by an unclean termination of wpa_supplicant "
2098                            "in which case you will need\n"
2099                            "to manually remove this file before starting "
2100                            "wpa_supplicant again.\n",
2101                            wpa_s->conf->ctrl_interface);
2102                 return -1;
2103         }
2104
2105         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2106                 wpa_s->drv_flags = capa.flags;
2107                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
2108                         if (ieee80211_sta_init(wpa_s))
2109                                 return -1;
2110                 }
2111                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2112         }
2113
2114 #ifdef CONFIG_IBSS_RSN
2115         wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
2116         if (!wpa_s->ibss_rsn) {
2117                 wpa_printf(MSG_DEBUG, "Failed to init IBSS RSN");
2118                 return -1;
2119         }
2120 #endif /* CONFIG_IBSS_RSN */
2121
2122         return 0;
2123 }
2124
2125
2126 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s)
2127 {
2128         if (wpa_s->drv_priv) {
2129                 wpa_supplicant_deauthenticate(wpa_s,
2130                                               WLAN_REASON_DEAUTH_LEAVING);
2131
2132                 wpa_drv_set_countermeasures(wpa_s, 0);
2133                 wpa_clear_keys(wpa_s, NULL);
2134         }
2135
2136         wpas_notify_iface_removed(wpa_s);
2137
2138         wpa_supplicant_cleanup(wpa_s);
2139
2140         if (wpa_s->drv_priv)
2141                 wpa_drv_deinit(wpa_s);
2142 }
2143
2144
2145 /**
2146  * wpa_supplicant_add_iface - Add a new network interface
2147  * @global: Pointer to global data from wpa_supplicant_init()
2148  * @iface: Interface configuration options
2149  * Returns: Pointer to the created interface or %NULL on failure
2150  *
2151  * This function is used to add new network interfaces for %wpa_supplicant.
2152  * This can be called before wpa_supplicant_run() to add interfaces before the
2153  * main event loop has been started. In addition, new interfaces can be added
2154  * dynamically while %wpa_supplicant is already running. This could happen,
2155  * e.g., when a hotplug network adapter is inserted.
2156  */
2157 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2158                                                  struct wpa_interface *iface)
2159 {
2160         struct wpa_supplicant *wpa_s;
2161         struct wpa_interface t_iface;
2162
2163         if (global == NULL || iface == NULL)
2164                 return NULL;
2165
2166         wpa_s = wpa_supplicant_alloc();
2167         if (wpa_s == NULL)
2168                 return NULL;
2169
2170         wpa_s->global = global;
2171
2172         t_iface = *iface;
2173         if (global->params.override_driver) {
2174                 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2175                            "('%s' -> '%s')",
2176                            iface->driver, global->params.override_driver);
2177                 t_iface.driver = global->params.override_driver;
2178         }
2179         if (global->params.override_ctrl_interface) {
2180                 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2181                            "ctrl_interface ('%s' -> '%s')",
2182                            iface->ctrl_interface,
2183                            global->params.override_ctrl_interface);
2184                 t_iface.ctrl_interface =
2185                         global->params.override_ctrl_interface;
2186         }
2187         if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2188                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2189                            iface->ifname);
2190                 wpa_supplicant_deinit_iface(wpa_s);
2191                 os_free(wpa_s);
2192                 return NULL;
2193         }
2194
2195         /* Notify the control interfaces about new iface */
2196         if (wpas_notify_iface_added(wpa_s)) {
2197                 wpa_supplicant_deinit_iface(wpa_s);
2198                 os_free(wpa_s);
2199                 return NULL;
2200         }
2201
2202         wpa_s->next = global->ifaces;
2203         global->ifaces = wpa_s;
2204
2205         wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2206
2207         return wpa_s;
2208 }
2209
2210
2211 /**
2212  * wpa_supplicant_remove_iface - Remove a network interface
2213  * @global: Pointer to global data from wpa_supplicant_init()
2214  * @wpa_s: Pointer to the network interface to be removed
2215  * Returns: 0 if interface was removed, -1 if interface was not found
2216  *
2217  * This function can be used to dynamically remove network interfaces from
2218  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2219  * addition, this function is used to remove all remaining interfaces when
2220  * %wpa_supplicant is terminated.
2221  */
2222 int wpa_supplicant_remove_iface(struct wpa_global *global,
2223                                 struct wpa_supplicant *wpa_s)
2224 {
2225         struct wpa_supplicant *prev;
2226
2227         /* Remove interface from the global list of interfaces */
2228         prev = global->ifaces;
2229         if (prev == wpa_s) {
2230                 global->ifaces = wpa_s->next;
2231         } else {
2232                 while (prev && prev->next != wpa_s)
2233                         prev = prev->next;
2234                 if (prev == NULL)
2235                         return -1;
2236                 prev->next = wpa_s->next;
2237         }
2238
2239         wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2240
2241         wpa_supplicant_deinit_iface(wpa_s);
2242         os_free(wpa_s);
2243
2244         return 0;
2245 }
2246
2247
2248 /**
2249  * wpa_supplicant_get_iface - Get a new network interface
2250  * @global: Pointer to global data from wpa_supplicant_init()
2251  * @ifname: Interface name
2252  * Returns: Pointer to the interface or %NULL if not found
2253  */
2254 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2255                                                  const char *ifname)
2256 {
2257         struct wpa_supplicant *wpa_s;
2258
2259         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2260                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2261                         return wpa_s;
2262         }
2263         return NULL;
2264 }
2265
2266
2267 /**
2268  * wpa_supplicant_init - Initialize %wpa_supplicant
2269  * @params: Parameters for %wpa_supplicant
2270  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2271  *
2272  * This function is used to initialize %wpa_supplicant. After successful
2273  * initialization, the returned data pointer can be used to add and remove
2274  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2275  */
2276 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2277 {
2278         struct wpa_global *global;
2279         int ret, i;
2280
2281         if (params == NULL)
2282                 return NULL;
2283
2284         wpa_debug_open_file(params->wpa_debug_file_path);
2285         if (params->wpa_debug_syslog)
2286                 wpa_debug_open_syslog();
2287
2288         ret = eap_peer_register_methods();
2289         if (ret) {
2290                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2291                 if (ret == -2)
2292                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2293                                    "the same EAP type.");
2294                 return NULL;
2295         }
2296
2297 #ifdef CONFIG_AP
2298         ret = eap_server_register_methods();
2299         if (ret) {
2300                 wpa_printf(MSG_ERROR, "Failed to register EAP server methods");
2301                 if (ret == -2)
2302                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2303                                    "the same EAP type.");
2304                 return NULL;
2305         }
2306 #endif /* CONFIG_AP */
2307
2308         global = os_zalloc(sizeof(*global));
2309         if (global == NULL)
2310                 return NULL;
2311         global->params.daemonize = params->daemonize;
2312         global->params.wait_for_monitor = params->wait_for_monitor;
2313         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2314         if (params->pid_file)
2315                 global->params.pid_file = os_strdup(params->pid_file);
2316         if (params->ctrl_interface)
2317                 global->params.ctrl_interface =
2318                         os_strdup(params->ctrl_interface);
2319         if (params->override_driver)
2320                 global->params.override_driver =
2321                         os_strdup(params->override_driver);
2322         if (params->override_ctrl_interface)
2323                 global->params.override_ctrl_interface =
2324                         os_strdup(params->override_ctrl_interface);
2325         wpa_debug_level = global->params.wpa_debug_level =
2326                 params->wpa_debug_level;
2327         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2328                 params->wpa_debug_show_keys;
2329         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2330                 params->wpa_debug_timestamp;
2331
2332         if (eloop_init(global)) {
2333                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2334                 wpa_supplicant_deinit(global);
2335                 return NULL;
2336         }
2337
2338         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2339         if (global->ctrl_iface == NULL) {
2340                 wpa_supplicant_deinit(global);
2341                 return NULL;
2342         }
2343
2344         if (wpas_notify_supplicant_initialized(global)) {
2345                 wpa_supplicant_deinit(global);
2346                 return NULL;
2347         }
2348
2349         for (i = 0; wpa_drivers[i]; i++)
2350                 global->drv_count++;
2351         if (global->drv_count == 0) {
2352                 wpa_printf(MSG_ERROR, "No drivers enabled");
2353                 wpa_supplicant_deinit(global);
2354                 return NULL;
2355         }
2356         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2357         if (global->drv_priv == NULL) {
2358                 wpa_supplicant_deinit(global);
2359                 return NULL;
2360         }
2361         for (i = 0; wpa_drivers[i]; i++) {
2362                 if (!wpa_drivers[i]->global_init)
2363                         continue;
2364                 global->drv_priv[i] = wpa_drivers[i]->global_init();
2365                 if (global->drv_priv[i] == NULL) {
2366                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
2367                                    "'%s'", wpa_drivers[i]->name);
2368                         wpa_supplicant_deinit(global);
2369                         return NULL;
2370                 }
2371         }
2372
2373         return global;
2374 }
2375
2376
2377 /**
2378  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2379  * @global: Pointer to global data from wpa_supplicant_init()
2380  * Returns: 0 after successful event loop run, -1 on failure
2381  *
2382  * This function starts the main event loop and continues running as long as
2383  * there are any remaining events. In most cases, this function is running as
2384  * long as the %wpa_supplicant process in still in use.
2385  */
2386 int wpa_supplicant_run(struct wpa_global *global)
2387 {
2388         struct wpa_supplicant *wpa_s;
2389
2390         if (global->params.daemonize &&
2391             wpa_supplicant_daemon(global->params.pid_file))
2392                 return -1;
2393
2394         if (global->params.wait_for_monitor) {
2395                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2396                         if (wpa_s->ctrl_iface)
2397                                 wpa_supplicant_ctrl_iface_wait(
2398                                         wpa_s->ctrl_iface);
2399         }
2400
2401         eloop_register_signal_terminate(wpa_supplicant_terminate, NULL);
2402         eloop_register_signal_reconfig(wpa_supplicant_reconfig, NULL);
2403
2404         eloop_run();
2405
2406         return 0;
2407 }
2408
2409
2410 /**
2411  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2412  * @global: Pointer to global data from wpa_supplicant_init()
2413  *
2414  * This function is called to deinitialize %wpa_supplicant and to free all
2415  * allocated resources. Remaining network interfaces will also be removed.
2416  */
2417 void wpa_supplicant_deinit(struct wpa_global *global)
2418 {
2419         int i;
2420
2421         if (global == NULL)
2422                 return;
2423
2424         while (global->ifaces)
2425                 wpa_supplicant_remove_iface(global, global->ifaces);
2426
2427         if (global->ctrl_iface)
2428                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2429
2430         wpas_notify_supplicant_deinitialized(global);
2431
2432         eap_peer_unregister_methods();
2433 #ifdef CONFIG_AP
2434         eap_server_unregister_methods();
2435 #endif /* CONFIG_AP */
2436
2437         for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2438                 if (!global->drv_priv[i])
2439                         continue;
2440                 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2441         }
2442         os_free(global->drv_priv);
2443
2444         eloop_destroy();
2445
2446         if (global->params.pid_file) {
2447                 os_daemonize_terminate(global->params.pid_file);
2448                 os_free(global->params.pid_file);
2449         }
2450         os_free(global->params.ctrl_interface);
2451         os_free(global->params.override_driver);
2452         os_free(global->params.override_ctrl_interface);
2453
2454         os_free(global);
2455         wpa_debug_close_syslog();
2456         wpa_debug_close_file();
2457 }