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

   1 /*
   2  * WPA Supplicant
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This file implements functions for registering and unregistering
  15  * %wpa_supplicant interfaces. In addition, this file contains number of
  16  * functions for managing network connections.
  17  */
  18
  19 #include "includes.h"
  20
  21 #include "common.h"
  22 #include "eapol_supp/eapol_supp_sm.h"
  23 #include "eap_peer/eap.h"
  24 #include "wpa.h"
  25 #include "eloop.h"
  26 #include "drivers/driver.h"
  27 #include "config.h"
  28 #include "l2_packet/l2_packet.h"
  29 #include "wpa_supplicant_i.h"
  30 #include "ctrl_iface.h"
  31 #include "ctrl_iface_dbus.h"
  32 #include "pcsc_funcs.h"
  33 #include "version.h"
  34 #include "preauth.h"
  35 #include "pmksa_cache.h"
  36 #include "wpa_ctrl.h"
  37 #include "mlme.h"
  38 #include "ieee802_11_defs.h"
  39 #include "blacklist.h"
  40 #include "wpas_glue.h"
  41
  42 const char *wpa_supplicant_version =
  43 "wpa_supplicant v" VERSION_STR "\n"
  44 "Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi> and contributors";
  45
  46 const char *wpa_supplicant_license =
  47 "This program is free software. You can distribute it and/or modify it\n"
  48 "under the terms of the GNU General Public License version 2.\n"
  49 "\n"
  50 "Alternatively, this software may be distributed under the terms of the\n"
  51 "BSD license. See README and COPYING for more details.\n"
  52 #ifdef EAP_TLS_OPENSSL
  53 "\nThis product includes software developed by the OpenSSL Project\n"
  54 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
  55 #endif /* EAP_TLS_OPENSSL */
  56 ;
  57
  58 #ifndef CONFIG_NO_STDOUT_DEBUG
  59 /* Long text divided into parts in order to fit in C89 strings size limits. */
  60 const char *wpa_supplicant_full_license1 =
  61 "This program is free software; you can redistribute it and/or modify\n"
  62 "it under the terms of the GNU General Public License version 2 as\n"
  63 "published by the Free Software Foundation.\n"
  64 "\n"
  65 "This program is distributed in the hope that it will be useful,\n"
  66 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  67 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  68 "GNU General Public License for more details.\n"
  69 "\n";
  70 const char *wpa_supplicant_full_license2 =
  71 "You should have received a copy of the GNU General Public License\n"
  72 "along with this program; if not, write to the Free Software\n"
  73 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA\n"
  74 "\n"
  75 "Alternatively, this software may be distributed under the terms of the\n"
  76 "BSD license.\n"
  77 "\n"
  78 "Redistribution and use in source and binary forms, with or without\n"
  79 "modification, are permitted provided that the following conditions are\n"
  80 "met:\n"
  81 "\n";
  82 const char *wpa_supplicant_full_license3 =
  83 "1. Redistributions of source code must retain the above copyright\n"
  84 "   notice, this list of conditions and the following disclaimer.\n"
  85 "\n"
  86 "2. Redistributions in binary form must reproduce the above copyright\n"
  87 "   notice, this list of conditions and the following disclaimer in the\n"
  88 "   documentation and/or other materials provided with the distribution.\n"
  89 "\n";
  90 const char *wpa_supplicant_full_license4 =
  91 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
  92 "   names of its contributors may be used to endorse or promote products\n"
  93 "   derived from this software without specific prior written permission.\n"
  94 "\n"
  95 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
  96 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
  97 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
  98 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
  99 const char *wpa_supplicant_full_license5 =
 100 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
 101 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
 102 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
 103 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
 104 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
 105 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
 106 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
 107 "\n";
 108 #endif /* CONFIG_NO_STDOUT_DEBUG */
 109
 110 extern struct wpa_driver_ops *wpa_supplicant_drivers[];
 111
 112 extern int wpa_debug_level;
 113 extern int wpa_debug_show_keys;
 114 extern int wpa_debug_timestamp;
 115
 116 /* Configure default/group WEP keys for static WEP */
 117 static int wpa_set_wep_keys(struct wpa_supplicant *wpa_s,
 118                             struct wpa_ssid *ssid)
 119 {
 120         int i, set = 0;
 121
 122         for (i = 0; i < NUM_WEP_KEYS; i++) {
 123                 if (ssid->wep_key_len[i] == 0)
 124                         continue;
 125
 126                 set = 1;
 127                 wpa_drv_set_key(wpa_s, WPA_ALG_WEP,
 128                                 (u8 *) "\xff\xff\xff\xff\xff\xff",
 129                                 i, i == ssid->wep_tx_keyidx, (u8 *) "", 0,
 130                                 ssid->wep_key[i], ssid->wep_key_len[i]);
 131         }
 132
 133         return set;
 134 }
 135
 136
 137 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
 138                                            struct wpa_ssid *ssid)
 139 {
 140         u8 key[32];
 141         size_t keylen;
 142         wpa_alg alg;
 143         u8 seq[6] = { 0 };
 144
 145         /* IBSS/WPA-None uses only one key (Group) for both receiving and
 146          * sending unicast and multicast packets. */
 147
 148         if (ssid->mode != IEEE80211_MODE_IBSS) {
 149                 wpa_printf(MSG_INFO, "WPA: Invalid mode %d (not IBSS/ad-hoc) "
 150                            "for WPA-None", ssid->mode);
 151                 return -1;
 152         }
 153
 154         if (!ssid->psk_set) {
 155                 wpa_printf(MSG_INFO, "WPA: No PSK configured for WPA-None");
 156                 return -1;
 157         }
 158
 159         switch (wpa_s->group_cipher) {
 160         case WPA_CIPHER_CCMP:
 161                 os_memcpy(key, ssid->psk, 16);
 162                 keylen = 16;
 163                 alg = WPA_ALG_CCMP;
 164                 break;
 165         case WPA_CIPHER_TKIP:
 166                 /* WPA-None uses the same Michael MIC key for both TX and RX */
 167                 os_memcpy(key, ssid->psk, 16 + 8);
 168                 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
 169                 keylen = 32;
 170                 alg = WPA_ALG_TKIP;
 171                 break;
 172         default:
 173                 wpa_printf(MSG_INFO, "WPA: Invalid group cipher %d for "
 174                            "WPA-None", wpa_s->group_cipher);
 175                 return -1;
 176         }
 177
 178         /* TODO: should actually remember the previously used seq#, both for TX
 179          * and RX from each STA.. */
 180
 181         return wpa_drv_set_key(wpa_s, alg, (u8 *) "\xff\xff\xff\xff\xff\xff",
 182                                0, 1, seq, 6, key, keylen);
 183 }
 184
 185
 186 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
 187 {
 188         struct wpa_supplicant *wpa_s = eloop_ctx;
 189         const u8 *bssid = wpa_s->bssid;
 190         if (is_zero_ether_addr(bssid))
 191                 bssid = wpa_s->pending_bssid;
 192         wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
 193                 MAC2STR(bssid));
 194         wpa_blacklist_add(wpa_s, bssid);
 195         wpa_sm_notify_disassoc(wpa_s->wpa);
 196         wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 197         wpa_s->reassociate = 1;
 198         wpa_supplicant_req_scan(wpa_s, 0, 0);
 199 }
 200
 201
 202 /**
 203  * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
 204  * @wpa_s: Pointer to wpa_supplicant data
 205  * @sec: Number of seconds after which to time out authentication
 206  * @usec: Number of microseconds after which to time out authentication
 207  *
 208  * This function is used to schedule a timeout for the current authentication
 209  * attempt.
 210  */
 211 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
 212                                      int sec, int usec)
 213 {
 214         if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
 215             wpa_s->driver && os_strcmp(wpa_s->driver->name, "wired") == 0)
 216                 return;
 217
 218         wpa_msg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
 219                 "%d usec", sec, usec);
 220         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 221         eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
 222 }
 223
 224
 225 /**
 226  * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
 227  * @wpa_s: Pointer to wpa_supplicant data
 228  *
 229  * This function is used to cancel authentication timeout scheduled with
 230  * wpa_supplicant_req_auth_timeout() and it is called when authentication has
 231  * been completed.
 232  */
 233 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
 234 {
 235         wpa_msg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
 236         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 237         wpa_blacklist_del(wpa_s, wpa_s->bssid);
 238 }
 239
 240
 241 /**
 242  * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
 243  * @wpa_s: Pointer to wpa_supplicant data
 244  *
 245  * This function is used to configure EAPOL state machine based on the selected
 246  * authentication mode.
 247  */
 248 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
 249 {
 250 #ifdef IEEE8021X_EAPOL
 251         struct eapol_config eapol_conf;
 252         struct wpa_ssid *ssid = wpa_s->current_ssid;
 253
 254         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 255                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 256                 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 257         }
 258         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 259             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 260                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 261         else
 262                 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
 263
 264         os_memset(&eapol_conf, 0, sizeof(eapol_conf));
 265         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 266                 eapol_conf.accept_802_1x_keys = 1;
 267                 eapol_conf.required_keys = 0;
 268                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
 269                         eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
 270                 }
 271                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
 272                         eapol_conf.required_keys |=
 273                                 EAPOL_REQUIRE_KEY_BROADCAST;
 274                 }
 275
 276                 if (wpa_s->conf && wpa_s->driver &&
 277                     os_strcmp(wpa_s->driver->name, "wired") == 0) {
 278                         eapol_conf.required_keys = 0;
 279                 }
 280         }
 281         if (wpa_s->conf)
 282                 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
 283         eapol_conf.workaround = ssid->eap_workaround;
 284         eapol_conf.eap_disabled =
 285                 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
 286                 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 287         eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
 288 #endif /* IEEE8021X_EAPOL */
 289 }
 290
 291
 292 /**
 293  * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
 294  * @wpa_s: Pointer to wpa_supplicant data
 295  * @ssid: Configuration data for the network
 296  *
 297  * This function is used to configure WPA state machine and related parameters
 298  * to a mode where WPA is not enabled. This is called as part of the
 299  * authentication configuration when the selected network does not use WPA.
 300  */
 301 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 302                                        struct wpa_ssid *ssid)
 303 {
 304         int i;
 305
 306         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
 307                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 308         else
 309                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 310         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 311         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 312         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 313         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 314         wpa_s->group_cipher = WPA_CIPHER_NONE;
 315         wpa_s->mgmt_group_cipher = 0;
 316
 317         for (i = 0; i < NUM_WEP_KEYS; i++) {
 318                 if (ssid->wep_key_len[i] > 5) {
 319                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
 320                         wpa_s->group_cipher = WPA_CIPHER_WEP104;
 321                         break;
 322                 } else if (ssid->wep_key_len[i] > 0) {
 323                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
 324                         wpa_s->group_cipher = WPA_CIPHER_WEP40;
 325                         break;
 326                 }
 327         }
 328
 329         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
 330         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 331         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 332                          wpa_s->pairwise_cipher);
 333         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 334 #ifdef CONFIG_IEEE80211W
 335         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 336                          wpa_s->mgmt_group_cipher);
 337 #endif /* CONFIG_IEEE80211W */
 338
 339         pmksa_cache_clear_current(wpa_s->wpa);
 340 }
 341
 342
 343 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 344 {
 345         scard_deinit(wpa_s->scard);
 346         wpa_s->scard = NULL;
 347         wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
 348         eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
 349         l2_packet_deinit(wpa_s->l2);
 350         wpa_s->l2 = NULL;
 351         if (wpa_s->l2_br) {
 352                 l2_packet_deinit(wpa_s->l2_br);
 353                 wpa_s->l2_br = NULL;
 354         }
 355
 356         if (wpa_s->ctrl_iface) {
 357                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 358                 wpa_s->ctrl_iface = NULL;
 359         }
 360         if (wpa_s->conf != NULL) {
 361                 wpa_config_free(wpa_s->conf);
 362                 wpa_s->conf = NULL;
 363         }
 364
 365         os_free(wpa_s->confname);
 366         wpa_s->confname = NULL;
 367
 368         wpa_sm_set_eapol(wpa_s->wpa, NULL);
 369         eapol_sm_deinit(wpa_s->eapol);
 370         wpa_s->eapol = NULL;
 371
 372         rsn_preauth_deinit(wpa_s->wpa);
 373
 374         pmksa_candidate_free(wpa_s->wpa);
 375         wpa_sm_deinit(wpa_s->wpa);
 376         wpa_s->wpa = NULL;
 377         wpa_blacklist_clear(wpa_s);
 378
 379         wpa_scan_results_free(wpa_s->scan_res);
 380         wpa_s->scan_res = NULL;
 381
 382         wpa_supplicant_cancel_scan(wpa_s);
 383         wpa_supplicant_cancel_auth_timeout(wpa_s);
 384
 385         ieee80211_sta_deinit(wpa_s);
 386 }
 387
 388
 389 /**
 390  * wpa_clear_keys - Clear keys configured for the driver
 391  * @wpa_s: Pointer to wpa_supplicant data
 392  * @addr: Previously used BSSID or %NULL if not available
 393  *
 394  * This function clears the encryption keys that has been previously configured
 395  * for the driver.
 396  */
 397 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
 398 {
 399         u8 *bcast = (u8 *) "\xff\xff\xff\xff\xff\xff";
 400
 401         if (wpa_s->keys_cleared) {
 402                 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
 403                  * timing issues with keys being cleared just before new keys
 404                  * are set or just after association or something similar. This
 405                  * shows up in group key handshake failing often because of the
 406                  * client not receiving the first encrypted packets correctly.
 407                  * Skipping some of the extra key clearing steps seems to help
 408                  * in completing group key handshake more reliably. */
 409                 wpa_printf(MSG_DEBUG, "No keys have been configured - "
 410                            "skip key clearing");
 411                 return;
 412         }
 413
 414         /* MLME-DELETEKEYS.request */
 415         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 0, 0, NULL, 0, NULL, 0);
 416         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 1, 0, NULL, 0, NULL, 0);
 417         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 2, 0, NULL, 0, NULL, 0);
 418         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 3, 0, NULL, 0, NULL, 0);
 419         if (addr) {
 420                 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
 421                                 0);
 422                 /* MLME-SETPROTECTION.request(None) */
 423                 wpa_drv_mlme_setprotection(
 424                         wpa_s, addr,
 425                         MLME_SETPROTECTION_PROTECT_TYPE_NONE,
 426                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 427         }
 428         wpa_s->keys_cleared = 1;
 429 }
 430
 431
 432 /**
 433  * wpa_supplicant_state_txt - Get the connection state name as a text string
 434  * @state: State (wpa_state; WPA_*)
 435  * Returns: The state name as a printable text string
 436  */
 437 const char * wpa_supplicant_state_txt(int state)
 438 {
 439         switch (state) {
 440         case WPA_DISCONNECTED:
 441                 return "DISCONNECTED";
 442         case WPA_INACTIVE:
 443                 return "INACTIVE";
 444         case WPA_SCANNING:
 445                 return "SCANNING";
 446         case WPA_ASSOCIATING:
 447                 return "ASSOCIATING";
 448         case WPA_ASSOCIATED:
 449                 return "ASSOCIATED";
 450         case WPA_4WAY_HANDSHAKE:
 451                 return "4WAY_HANDSHAKE";
 452         case WPA_GROUP_HANDSHAKE:
 453                 return "GROUP_HANDSHAKE";
 454         case WPA_COMPLETED:
 455                 return "COMPLETED";
 456         default:
 457                 return "UNKNOWN";
 458         }
 459 }
 460
 461
 462 /**
 463  * wpa_supplicant_set_state - Set current connection state
 464  * @wpa_s: Pointer to wpa_supplicant data
 465  * @state: The new connection state
 466  *
 467  * This function is called whenever the connection state changes, e.g.,
 468  * association is completed for WPA/WPA2 4-Way Handshake is started.
 469  */
 470 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, wpa_states state)
 471 {
 472         wpa_printf(MSG_DEBUG, "State: %s -> %s",
 473                    wpa_supplicant_state_txt(wpa_s->wpa_state),
 474                    wpa_supplicant_state_txt(state));
 475
 476         wpa_supplicant_dbus_notify_state_change(wpa_s, state,
 477                                                 wpa_s->wpa_state);
 478
 479         if (state == WPA_COMPLETED && wpa_s->new_connection) {
 480 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
 481                 struct wpa_ssid *ssid = wpa_s->current_ssid;
 482                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
 483                         MACSTR " completed %s [id=%d id_str=%s]",
 484                         MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
 485                         "(reauth)" : "(auth)",
 486                         ssid ? ssid->id : -1,
 487                         ssid && ssid->id_str ? ssid->id_str : "");
 488 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
 489                 wpa_s->new_connection = 0;
 490                 wpa_s->reassociated_connection = 1;
 491                 wpa_drv_set_operstate(wpa_s, 1);
 492         } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 493                    state == WPA_ASSOCIATED) {
 494                 wpa_s->new_connection = 1;
 495                 wpa_drv_set_operstate(wpa_s, 0);
 496         }
 497         wpa_s->wpa_state = state;
 498 }
 499
 500
 501 static void wpa_supplicant_terminate(int sig, void *eloop_ctx,
 502                                      void *signal_ctx)
 503 {
 504         struct wpa_global *global = eloop_ctx;
 505         struct wpa_supplicant *wpa_s;
 506         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 507                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
 508                         "received", sig);
 509         }
 510         eloop_terminate();
 511 }
 512
 513
 514 static void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
 515 {
 516         wpa_s->pairwise_cipher = 0;
 517         wpa_s->group_cipher = 0;
 518         wpa_s->mgmt_group_cipher = 0;
 519         wpa_s->key_mgmt = 0;
 520         wpa_s->wpa_state = WPA_DISCONNECTED;
 521 }
 522
 523
 524 /**
 525  * wpa_supplicant_reload_configuration - Reload configuration data
 526  * @wpa_s: Pointer to wpa_supplicant data
 527  * Returns: 0 on success or -1 if configuration parsing failed
 528  *
 529  * This function can be used to request that the configuration data is reloaded
 530  * (e.g., after configuration file change). This function is reloading
 531  * configuration only for one interface, so this may need to be called multiple
 532  * times if %wpa_supplicant is controlling multiple interfaces and all
 533  * interfaces need reconfiguration.
 534  */
 535 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
 536 {
 537         struct wpa_config *conf;
 538         int reconf_ctrl;
 539         if (wpa_s->confname == NULL)
 540                 return -1;
 541         conf = wpa_config_read(wpa_s->confname);
 542         if (conf == NULL) {
 543                 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
 544                         "file '%s' - exiting", wpa_s->confname);
 545                 return -1;
 546         }
 547
 548         reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
 549                 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
 550                     os_strcmp(conf->ctrl_interface,
 551                               wpa_s->conf->ctrl_interface) != 0);
 552
 553         if (reconf_ctrl && wpa_s->ctrl_iface) {
 554                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 555                 wpa_s->ctrl_iface = NULL;
 556         }
 557
 558         eapol_sm_invalidate_cached_session(wpa_s->eapol);
 559         wpa_s->current_ssid = NULL;
 560         /*
 561          * TODO: should notify EAPOL SM about changes in opensc_engine_path,
 562          * pkcs11_engine_path, pkcs11_module_path.
 563          */
 564         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 565                 /*
 566                  * Clear forced success to clear EAP state for next
 567                  * authentication.
 568                  */
 569                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 570         }
 571         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 572         wpa_sm_set_config(wpa_s->wpa, NULL);
 573         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
 574         rsn_preauth_deinit(wpa_s->wpa);
 575         wpa_config_free(wpa_s->conf);
 576         wpa_s->conf = conf;
 577         if (reconf_ctrl)
 578                 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
 579
 580         wpa_supplicant_clear_status(wpa_s);
 581         wpa_s->reassociate = 1;
 582         wpa_supplicant_req_scan(wpa_s, 0, 0);
 583         wpa_msg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
 584         return 0;
 585 }
 586
 587
 588 static void wpa_supplicant_reconfig(int sig, void *eloop_ctx,
 589                                     void *signal_ctx)
 590 {
 591         struct wpa_global *global = eloop_ctx;
 592         struct wpa_supplicant *wpa_s;
 593         wpa_printf(MSG_DEBUG, "Signal %d received - reconfiguring", sig);
 594         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 595                 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
 596                         eloop_terminate();
 597                 }
 598         }
 599 }
 600
 601
 602 static wpa_cipher cipher_suite2driver(int cipher)
 603 {
 604         switch (cipher) {
 605         case WPA_CIPHER_NONE:
 606                 return CIPHER_NONE;
 607         case WPA_CIPHER_WEP40:
 608                 return CIPHER_WEP40;
 609         case WPA_CIPHER_WEP104:
 610                 return CIPHER_WEP104;
 611         case WPA_CIPHER_CCMP:
 612                 return CIPHER_CCMP;
 613         case WPA_CIPHER_TKIP:
 614         default:
 615                 return CIPHER_TKIP;
 616         }
 617 }
 618
 619
 620 static wpa_key_mgmt key_mgmt2driver(int key_mgmt)
 621 {
 622         switch (key_mgmt) {
 623         case WPA_KEY_MGMT_NONE:
 624                 return KEY_MGMT_NONE;
 625         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
 626                 return KEY_MGMT_802_1X_NO_WPA;
 627         case WPA_KEY_MGMT_IEEE8021X:
 628                 return KEY_MGMT_802_1X;
 629         case WPA_KEY_MGMT_WPA_NONE:
 630                 return KEY_MGMT_WPA_NONE;
 631         case WPA_KEY_MGMT_FT_IEEE8021X:
 632                 return KEY_MGMT_FT_802_1X;
 633         case WPA_KEY_MGMT_FT_PSK:
 634                 return KEY_MGMT_FT_PSK;
 635         case WPA_KEY_MGMT_IEEE8021X_SHA256:
 636                 return KEY_MGMT_802_1X_SHA256;
 637         case WPA_KEY_MGMT_PSK_SHA256:
 638                 return KEY_MGMT_PSK_SHA256;
 639         case WPA_KEY_MGMT_PSK:
 640         default:
 641                 return KEY_MGMT_PSK;
 642         }
 643 }
 644
 645
 646 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
 647                                          struct wpa_ssid *ssid,
 648                                          struct wpa_ie_data *ie)
 649 {
 650         int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
 651         if (ret) {
 652                 if (ret == -2) {
 653                         wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
 654                                 "from association info");
 655                 }
 656                 return -1;
 657         }
 658
 659         wpa_printf(MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set cipher "
 660                    "suites");
 661         if (!(ie->group_cipher & ssid->group_cipher)) {
 662                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
 663                         "cipher 0x%x (mask 0x%x) - reject",
 664                         ie->group_cipher, ssid->group_cipher);
 665                 return -1;
 666         }
 667         if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
 668                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
 669                         "cipher 0x%x (mask 0x%x) - reject",
 670                         ie->pairwise_cipher, ssid->pairwise_cipher);
 671                 return -1;
 672         }
 673         if (!(ie->key_mgmt & ssid->key_mgmt)) {
 674                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
 675                         "management 0x%x (mask 0x%x) - reject",
 676                         ie->key_mgmt, ssid->key_mgmt);
 677                 return -1;
 678         }
 679
 680 #ifdef CONFIG_IEEE80211W
 681         if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
 682             ssid->ieee80211w == IEEE80211W_REQUIRED) {
 683                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
 684                         "that does not support management frame protection - "
 685                         "reject");
 686                 return -1;
 687         }
 688 #endif /* CONFIG_IEEE80211W */
 689
 690         return 0;
 691 }
 692
 693
 694 /**
 695  * wpa_supplicant_set_suites - Set authentication and encryption parameters
 696  * @wpa_s: Pointer to wpa_supplicant data
 697  * @bss: Scan results for the selected BSS, or %NULL if not available
 698  * @ssid: Configuration data for the selected network
 699  * @wpa_ie: Buffer for the WPA/RSN IE
 700  * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
 701  * used buffer length in case the functions returns success.
 702  * Returns: 0 on success or -1 on failure
 703  *
 704  * This function is used to configure authentication and encryption parameters
 705  * based on the network configuration and scan result for the selected BSS (if
 706  * available).
 707  */
 708 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 709                               struct wpa_scan_res *bss,
 710                               struct wpa_ssid *ssid,
 711                               u8 *wpa_ie, size_t *wpa_ie_len)
 712 {
 713         struct wpa_ie_data ie;
 714         int sel, proto;
 715         const u8 *bss_wpa, *bss_rsn;
 716
 717         if (bss) {
 718                 bss_wpa = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 719                 bss_rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 720         } else
 721                 bss_wpa = bss_rsn = NULL;
 722
 723         if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
 724             wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
 725             (ie.group_cipher & ssid->group_cipher) &&
 726             (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 727             (ie.key_mgmt & ssid->key_mgmt)) {
 728                 wpa_msg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
 729                 proto = WPA_PROTO_RSN;
 730         } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
 731                    wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
 732                    (ie.group_cipher & ssid->group_cipher) &&
 733                    (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 734                    (ie.key_mgmt & ssid->key_mgmt)) {
 735                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
 736                 proto = WPA_PROTO_WPA;
 737         } else if (bss) {
 738                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
 739                 return -1;
 740         } else {
 741                 if (ssid->proto & WPA_PROTO_RSN)
 742                         proto = WPA_PROTO_RSN;
 743                 else
 744                         proto = WPA_PROTO_WPA;
 745                 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
 746                         os_memset(&ie, 0, sizeof(ie));
 747                         ie.group_cipher = ssid->group_cipher;
 748                         ie.pairwise_cipher = ssid->pairwise_cipher;
 749                         ie.key_mgmt = ssid->key_mgmt;
 750 #ifdef CONFIG_IEEE80211W
 751                         ie.mgmt_group_cipher =
 752                                 ssid->ieee80211w != NO_IEEE80211W ?
 753                                 WPA_CIPHER_AES_128_CMAC : 0;
 754 #endif /* CONFIG_IEEE80211W */
 755                         wpa_printf(MSG_DEBUG, "WPA: Set cipher suites based "
 756                                    "on configuration");
 757                 } else
 758                         proto = ie.proto;
 759         }
 760
 761         wpa_printf(MSG_DEBUG, "WPA: Selected cipher suites: group %d "
 762                    "pairwise %d key_mgmt %d proto %d",
 763                    ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
 764 #ifdef CONFIG_IEEE80211W
 765         if (ssid->ieee80211w) {
 766                 wpa_printf(MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
 767                            ie.mgmt_group_cipher);
 768         }
 769 #endif /* CONFIG_IEEE80211W */
 770
 771         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
 772         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
 773                          !!(ssid->proto & WPA_PROTO_RSN));
 774
 775         if (bss || !wpa_s->ap_ies_from_associnfo) {
 776                 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
 777                                          bss_wpa ? 2 + bss_wpa[1] : 0) ||
 778                     wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
 779                                          bss_rsn ? 2 + bss_rsn[1] : 0))
 780                         return -1;
 781         }
 782
 783         sel = ie.group_cipher & ssid->group_cipher;
 784         if (sel & WPA_CIPHER_CCMP) {
 785                 wpa_s->group_cipher = WPA_CIPHER_CCMP;
 786                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
 787         } else if (sel & WPA_CIPHER_TKIP) {
 788                 wpa_s->group_cipher = WPA_CIPHER_TKIP;
 789                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
 790         } else if (sel & WPA_CIPHER_WEP104) {
 791                 wpa_s->group_cipher = WPA_CIPHER_WEP104;
 792                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
 793         } else if (sel & WPA_CIPHER_WEP40) {
 794                 wpa_s->group_cipher = WPA_CIPHER_WEP40;
 795                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
 796         } else {
 797                 wpa_printf(MSG_WARNING, "WPA: Failed to select group cipher.");
 798                 return -1;
 799         }
 800
 801         sel = ie.pairwise_cipher & ssid->pairwise_cipher;
 802         if (sel & WPA_CIPHER_CCMP) {
 803                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 804                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
 805         } else if (sel & WPA_CIPHER_TKIP) {
 806                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 807                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
 808         } else if (sel & WPA_CIPHER_NONE) {
 809                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 810                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
 811         } else {
 812                 wpa_printf(MSG_WARNING, "WPA: Failed to select pairwise "
 813                            "cipher.");
 814                 return -1;
 815         }
 816
 817         sel = ie.key_mgmt & ssid->key_mgmt;
 818         if (0) {
 819 #ifdef CONFIG_IEEE80211R
 820         } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
 821                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
 822                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
 823         } else if (sel & WPA_KEY_MGMT_FT_PSK) {
 824                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
 825                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
 826 #endif /* CONFIG_IEEE80211R */
 827 #ifdef CONFIG_IEEE80211W
 828         } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
 829                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
 830                 wpa_msg(wpa_s, MSG_DEBUG,
 831                         "WPA: using KEY_MGMT 802.1X with SHA256");
 832         } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
 833                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
 834                 wpa_msg(wpa_s, MSG_DEBUG,
 835                         "WPA: using KEY_MGMT PSK with SHA256");
 836 #endif /* CONFIG_IEEE80211W */
 837         } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
 838                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 839                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
 840         } else if (sel & WPA_KEY_MGMT_PSK) {
 841                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
 842                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
 843         } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
 844                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
 845                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
 846         } else {
 847                 wpa_printf(MSG_WARNING, "WPA: Failed to select authenticated "
 848                            "key management type.");
 849                 return -1;
 850         }
 851
 852         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 853         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 854                          wpa_s->pairwise_cipher);
 855         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 856
 857 #ifdef CONFIG_IEEE80211W
 858         sel = ie.mgmt_group_cipher;
 859         if (ssid->ieee80211w == NO_IEEE80211W ||
 860             !(ie.capabilities & WPA_CAPABILITY_MFPC))
 861                 sel = 0;
 862         if (sel & WPA_CIPHER_AES_128_CMAC) {
 863                 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
 864                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
 865                         "AES-128-CMAC");
 866         } else {
 867                 wpa_s->mgmt_group_cipher = 0;
 868                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
 869         }
 870         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 871                          wpa_s->mgmt_group_cipher);
 872 #endif /* CONFIG_IEEE80211W */
 873
 874         if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
 875                 wpa_printf(MSG_WARNING, "WPA: Failed to generate WPA IE.");
 876                 return -1;
 877         }
 878
 879         if (ssid->key_mgmt &
 880             (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
 881                 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
 882         else
 883                 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
 884
 885         return 0;
 886 }
 887
 888
 889 /**
 890  * wpa_supplicant_associate - Request association
 891  * @wpa_s: Pointer to wpa_supplicant data
 892  * @bss: Scan results for the selected BSS, or %NULL if not available
 893  * @ssid: Configuration data for the selected network
 894  *
 895  * This function is used to request %wpa_supplicant to associate with a BSS.
 896  */
 897 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
 898                               struct wpa_scan_res *bss, struct wpa_ssid *ssid)
 899 {
 900         u8 wpa_ie[80];
 901         size_t wpa_ie_len;
 902         int use_crypt, ret, i;
 903         int algs = AUTH_ALG_OPEN_SYSTEM;
 904         wpa_cipher cipher_pairwise, cipher_group;
 905         struct wpa_driver_associate_params params;
 906         int wep_keys_set = 0;
 907         struct wpa_driver_capa capa;
 908         int assoc_failed = 0;
 909
 910         wpa_s->reassociate = 0;
 911         if (bss) {
 912 #ifdef CONFIG_IEEE80211R
 913                 const u8 *md = NULL;
 914 #endif /* CONFIG_IEEE80211R */
 915                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 916                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
 917                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
 918                         ie ? wpa_ssid_txt(ie + 2, ie[1]) : "", bss->freq);
 919                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
 920                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
 921 #ifdef CONFIG_IEEE80211R
 922                 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
 923                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
 924                         md = ie + 2;
 925                 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
 926                 /* Prepare for the next transition */
 927                 wpa_ft_prepare_auth_request(wpa_s->wpa);
 928 #endif /* CONFIG_IEEE80211R */
 929         } else {
 930                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
 931                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
 932                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 933         }
 934         wpa_supplicant_cancel_scan(wpa_s);
 935
 936         /* Starting new association, so clear the possibly used WPA IE from the
 937          * previous association. */
 938         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 939
 940 #ifdef IEEE8021X_EAPOL
 941         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 942                 if (ssid->leap) {
 943                         if (ssid->non_leap == 0)
 944                                 algs = AUTH_ALG_LEAP;
 945                         else
 946                                 algs |= AUTH_ALG_LEAP;
 947                 }
 948         }
 949 #endif /* IEEE8021X_EAPOL */
 950         wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
 951         if (ssid->auth_alg) {
 952                 algs = 0;
 953                 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
 954                         algs |= AUTH_ALG_OPEN_SYSTEM;
 955                 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
 956                         algs |= AUTH_ALG_SHARED_KEY;
 957                 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
 958                         algs |= AUTH_ALG_LEAP;
 959                 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
 960                            algs);
 961         }
 962         wpa_drv_set_auth_alg(wpa_s, algs);
 963
 964         if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
 965                     wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
 966             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 967                                WPA_KEY_MGMT_FT_IEEE8021X |
 968                                WPA_KEY_MGMT_FT_PSK |
 969                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
 970                                WPA_KEY_MGMT_PSK_SHA256))) {
 971                 int try_opportunistic;
 972                 try_opportunistic = ssid->proactive_key_caching &&
 973                         (ssid->proto & WPA_PROTO_RSN);
 974                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
 975                                             wpa_s->current_ssid,
 976                                             try_opportunistic) == 0)
 977                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 978                 wpa_ie_len = sizeof(wpa_ie);
 979                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
 980                                               wpa_ie, &wpa_ie_len)) {
 981                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
 982                                    "management and encryption suites");
 983                         return;
 984                 }
 985         } else if (ssid->key_mgmt &
 986                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
 987                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
 988                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
 989                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
 990                 wpa_ie_len = sizeof(wpa_ie);
 991                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 992                                               wpa_ie, &wpa_ie_len)) {
 993                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
 994                                    "management and encryption suites (no scan "
 995                                    "results)");
 996                         return;
 997                 }
 998         } else {
 999                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1000                 wpa_ie_len = 0;
1001         }
1002
1003         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1004         use_crypt = 1;
1005         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1006         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1007         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1008             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1009                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1010                         use_crypt = 0;
1011                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1012                         use_crypt = 1;
1013                         wep_keys_set = 1;
1014                 }
1015         }
1016
1017 #ifdef IEEE8021X_EAPOL
1018         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1019                 if ((ssid->eapol_flags &
1020                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1021                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1022                     !wep_keys_set) {
1023                         use_crypt = 0;
1024                 } else {
1025                         /* Assume that dynamic WEP-104 keys will be used and
1026                          * set cipher suites in order for drivers to expect
1027                          * encryption. */
1028                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1029                 }
1030         }
1031 #endif /* IEEE8021X_EAPOL */
1032
1033         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1034                 /* Set the key before (and later after) association */
1035                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1036         }
1037
1038         wpa_drv_set_drop_unencrypted(wpa_s, use_crypt);
1039         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1040         os_memset(&params, 0, sizeof(params));
1041         if (bss) {
1042                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1043                 params.bssid = bss->bssid;
1044                 params.ssid = ie ? ie + 2 : (u8 *) "";
1045                 params.ssid_len = ie ? ie[1] : 0;
1046                 params.freq = bss->freq;
1047         } else {
1048                 params.ssid = ssid->ssid;
1049                 params.ssid_len = ssid->ssid_len;
1050         }
1051         if (ssid->mode == 1 && ssid->frequency > 0 && params.freq == 0)
1052                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1053         params.wpa_ie = wpa_ie;
1054         params.wpa_ie_len = wpa_ie_len;
1055         params.pairwise_suite = cipher_pairwise;
1056         params.group_suite = cipher_group;
1057         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1058         params.auth_alg = algs;
1059         params.mode = ssid->mode;
1060         for (i = 0; i < NUM_WEP_KEYS; i++) {
1061                 if (ssid->wep_key_len[i])
1062                         params.wep_key[i] = ssid->wep_key[i];
1063                 params.wep_key_len[i] = ssid->wep_key_len[i];
1064         }
1065         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1066
1067         if (wpa_s->driver_4way_handshake &&
1068             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1069              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1070                 params.passphrase = ssid->passphrase;
1071                 if (ssid->psk_set)
1072                         params.psk = ssid->psk;
1073         }
1074
1075 #ifdef CONFIG_IEEE80211W
1076         switch (ssid->ieee80211w) {
1077         case NO_IEEE80211W:
1078                 params.mgmt_frame_protection = NO_MGMT_FRAME_PROTECTION;
1079                 break;
1080         case IEEE80211W_OPTIONAL:
1081                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_OPTIONAL;
1082                 break;
1083         case IEEE80211W_REQUIRED:
1084                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_REQUIRED;
1085                 break;
1086         }
1087 #endif /* CONFIG_IEEE80211W */
1088
1089         if (wpa_s->use_client_mlme)
1090                 ret = ieee80211_sta_associate(wpa_s, &params);
1091         else
1092                 ret = wpa_drv_associate(wpa_s, &params);
1093         if (ret < 0) {
1094                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1095                         "failed");
1096                 /* try to continue anyway; new association will be tried again
1097                  * after timeout */
1098                 assoc_failed = 1;
1099         }
1100
1101         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1102                 /* Set the key after the association just in case association
1103                  * cleared the previously configured key. */
1104                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1105                 /* No need to timeout authentication since there is no key
1106                  * management. */
1107                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1108                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1109         } else {
1110                 /* Timeout for IEEE 802.11 authentication and association */
1111                 int timeout = 60;
1112
1113                 if (assoc_failed) {
1114                         /* give IBSS a bit more time */
1115                         timeout = ssid->mode ? 10 : 5;
1116                 } else if (wpa_s->conf->ap_scan == 1) {
1117                         /* give IBSS a bit more time */
1118                         timeout = ssid->mode ? 20 : 10;
1119                 }
1120                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1121         }
1122
1123         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1124             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1125                 /* Set static WEP keys again */
1126                 wpa_set_wep_keys(wpa_s, ssid);
1127         }
1128
1129         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1130                 /*
1131                  * Do not allow EAP session resumption between different
1132                  * network configurations.
1133                  */
1134                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1135         }
1136         wpa_s->current_ssid = ssid;
1137         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1138         wpa_supplicant_initiate_eapol(wpa_s);
1139 }
1140
1141
1142 /**
1143  * wpa_supplicant_disassociate - Disassociate the current connection
1144  * @wpa_s: Pointer to wpa_supplicant data
1145  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1146  *
1147  * This function is used to request %wpa_supplicant to disassociate with the
1148  * current AP.
1149  */
1150 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1151                                  int reason_code)
1152 {
1153         u8 *addr = NULL;
1154         if (!is_zero_ether_addr(wpa_s->bssid)) {
1155                 if (wpa_s->use_client_mlme)
1156                         ieee80211_sta_disassociate(wpa_s, reason_code);
1157                 else
1158                         wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1159                 addr = wpa_s->bssid;
1160         }
1161         wpa_clear_keys(wpa_s, addr);
1162         wpa_supplicant_mark_disassoc(wpa_s);
1163         wpa_s->current_ssid = NULL;
1164         wpa_sm_set_config(wpa_s->wpa, NULL);
1165         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1166 }
1167
1168
1169 /**
1170  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1171  * @wpa_s: Pointer to wpa_supplicant data
1172  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1173  *
1174  * This function is used to request %wpa_supplicant to disassociate with the
1175  * current AP.
1176  */
1177 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1178                                    int reason_code)
1179 {
1180         u8 *addr = NULL;
1181         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1182         if (!is_zero_ether_addr(wpa_s->bssid)) {
1183                 if (wpa_s->use_client_mlme)
1184                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1185                 else
1186                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1187                                                reason_code);
1188                 addr = wpa_s->bssid;
1189         }
1190         wpa_clear_keys(wpa_s, addr);
1191         wpa_s->current_ssid = NULL;
1192         wpa_sm_set_config(wpa_s->wpa, NULL);
1193         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1194         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1195         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1196 }
1197
1198
1199 static int wpa_supplicant_get_scan_results_old(struct wpa_supplicant *wpa_s)
1200 {
1201 #define SCAN_AP_LIMIT 128
1202         struct wpa_scan_result *results;
1203         int num, i;
1204         struct wpa_scan_results *res;
1205
1206         results = os_malloc(SCAN_AP_LIMIT * sizeof(struct wpa_scan_result));
1207         if (results == NULL) {
1208                 wpa_printf(MSG_WARNING, "Failed to allocate memory for scan "
1209                            "results");
1210                 return -1;
1211         }
1212
1213         num = wpa_drv_get_scan_results(wpa_s, results, SCAN_AP_LIMIT);
1214         wpa_printf(MSG_DEBUG, "Scan results: %d", num);
1215         if (num < 0) {
1216                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1217                 os_free(results);
1218                 return -1;
1219         }
1220         if (num > SCAN_AP_LIMIT) {
1221                 wpa_printf(MSG_INFO, "Not enough room for all APs (%d < %d)",
1222                            num, SCAN_AP_LIMIT);
1223                 num = SCAN_AP_LIMIT;
1224         }
1225
1226         wpa_scan_results_free(wpa_s->scan_res);
1227         wpa_s->scan_res = NULL;
1228
1229         /* Convert old scan result data structure to the new one */
1230         res = os_zalloc(sizeof(*res));
1231         if (res == NULL) {
1232                 os_free(results);
1233                 return -1;
1234         }
1235         res->res = os_zalloc(num * sizeof(struct wpa_scan_res *));
1236         if (res->res == NULL) {
1237                 os_free(results);
1238                 os_free(res);
1239                 return -1;
1240         }
1241
1242         for (i = 0; i < num; i++) {
1243                 struct wpa_scan_result *bss = &results[i];
1244                 struct wpa_scan_res *r;
1245                 size_t ie_len;
1246                 u8 *pos;
1247
1248                 ie_len = 2 + bss->ssid_len + bss->rsn_ie_len + bss->wpa_ie_len;
1249                 if (bss->maxrate)
1250                         ie_len += 3;
1251                 if (bss->mdie_present)
1252                         ie_len += 5;
1253
1254                 r = os_zalloc(sizeof(*r) + ie_len);
1255                 if (r == NULL)
1256                         break;
1257
1258                 os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
1259                 r->freq = bss->freq;
1260                 r->caps = bss->caps;
1261                 r->qual = bss->qual;
1262                 r->noise = bss->noise;
1263                 r->level = bss->level;
1264                 r->tsf = bss->tsf;
1265                 r->ie_len = ie_len;
1266
1267                 pos = (u8 *) (r + 1);
1268
1269                 /* SSID IE */
1270                 *pos++ = WLAN_EID_SSID;
1271                 *pos++ = bss->ssid_len;
1272                 os_memcpy(pos, bss->ssid, bss->ssid_len);
1273                 pos += bss->ssid_len;
1274
1275                 if (bss->maxrate) {
1276                         /* Fake Supported Rate IE to include max rate */
1277                         *pos++ = WLAN_EID_SUPP_RATES;
1278                         *pos++ = 1;
1279                         *pos++ = bss->maxrate;
1280                 }
1281
1282                 if (bss->rsn_ie_len) {
1283                         os_memcpy(pos, bss->rsn_ie, bss->rsn_ie_len);
1284                         pos += bss->rsn_ie_len;
1285                 }
1286
1287                 if (bss->mdie_present) {
1288                         os_memcpy(pos, bss->mdie, 5);
1289                         pos += 5;
1290                 }
1291
1292                 if (bss->wpa_ie_len) {
1293                         os_memcpy(pos, bss->wpa_ie, bss->wpa_ie_len);
1294                         pos += bss->wpa_ie_len;
1295                 }
1296
1297                 res->res[res->num++] = r;
1298         }
1299
1300         os_free(results);
1301         wpa_s->scan_res = res;
1302
1303         return 0;
1304 }
1305
1306
1307 /**
1308  * wpa_supplicant_get_scan_results - Get scan results
1309  * @wpa_s: Pointer to wpa_supplicant data
1310  * Returns: 0 on success, -1 on failure
1311  *
1312  * This function is request the current scan results from the driver and stores
1313  * a local copy of the results in wpa_s->scan_res.
1314  */
1315 int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s)
1316 {
1317         int ret;
1318
1319         if (wpa_s->use_client_mlme) {
1320                 wpa_scan_results_free(wpa_s->scan_res);
1321                 wpa_s->scan_res = ieee80211_sta_get_scan_results(wpa_s);
1322                 if (wpa_s->scan_res == NULL) {
1323                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1324                         ret = -1;
1325                 } else
1326                         ret = 0;
1327         } else if (wpa_s->driver->get_scan_results2 == NULL)
1328                 ret = wpa_supplicant_get_scan_results_old(wpa_s);
1329         else {
1330                 wpa_scan_results_free(wpa_s->scan_res);
1331                 wpa_s->scan_res = wpa_drv_get_scan_results2(wpa_s);
1332                 if (wpa_s->scan_res == NULL) {
1333                         wpa_printf(MSG_DEBUG, "Failed to get scan results");
1334                         ret = -1;
1335                 } else
1336                         ret = 0;
1337         }
1338
1339         if (wpa_s->scan_res)
1340                 wpa_scan_sort_results(wpa_s->scan_res);
1341
1342         return ret;
1343 }
1344
1345
1346 /**
1347  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1348  * @wpa_s: Pointer to wpa_supplicant data
1349  * Returns: A pointer to the current network structure or %NULL on failure
1350  */
1351 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1352 {
1353         struct wpa_ssid *entry;
1354         u8 ssid[MAX_SSID_LEN];
1355         int res;
1356         size_t ssid_len;
1357         u8 bssid[ETH_ALEN];
1358         int wired;
1359
1360         if (wpa_s->use_client_mlme) {
1361                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1362                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1363                                    "MLME.");
1364                         return NULL;
1365                 }
1366         } else {
1367                 res = wpa_drv_get_ssid(wpa_s, ssid);
1368                 if (res < 0) {
1369                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1370                                    "driver.");
1371                         return NULL;
1372                 }
1373                 ssid_len = res;
1374         }
1375
1376         if (wpa_s->use_client_mlme)
1377                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1378         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1379                 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1380                 return NULL;
1381         }
1382
1383         wired = wpa_s->conf->ap_scan == 0 && wpa_s->driver &&
1384                 os_strcmp(wpa_s->driver->name, "wired") == 0;
1385
1386         entry = wpa_s->conf->ssid;
1387         while (entry) {
1388                 if (!entry->disabled &&
1389                     ((ssid_len == entry->ssid_len &&
1390                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1391                     (!entry->bssid_set ||
1392                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1393                         return entry;
1394                 entry = entry->next;
1395         }
1396
1397         return NULL;
1398 }
1399
1400
1401 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1402                                      const char *name)
1403 {
1404         int i;
1405
1406         if (wpa_s == NULL)
1407                 return -1;
1408
1409         if (wpa_supplicant_drivers[0] == NULL) {
1410                 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1411                            "wpa_supplicant.");
1412                 return -1;
1413         }
1414
1415         if (name == NULL) {
1416                 /* default to first driver in the list */
1417                 wpa_s->driver = wpa_supplicant_drivers[0];
1418                 return 0;
1419         }
1420
1421         for (i = 0; wpa_supplicant_drivers[i]; i++) {
1422                 if (os_strcmp(name, wpa_supplicant_drivers[i]->name) == 0) {
1423                         wpa_s->driver = wpa_supplicant_drivers[i];
1424                         return 0;
1425                 }
1426         }
1427
1428         wpa_printf(MSG_ERROR, "Unsupported driver '%s'.\n", name);
1429         return -1;
1430 }
1431
1432
1433 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1434                              const u8 *buf, size_t len)
1435 {
1436         struct wpa_supplicant *wpa_s = ctx;
1437
1438         wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1439         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1440
1441         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1442                 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1443                            "no key management is configured");
1444                 return;
1445         }
1446
1447         if (wpa_s->eapol_received == 0 &&
1448             (!wpa_s->driver_4way_handshake ||
1449              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1450              wpa_s->wpa_state != WPA_COMPLETED)) {
1451                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1452                 wpa_supplicant_req_auth_timeout(
1453                         wpa_s,
1454                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1455                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) ?
1456                         70 : 10, 0);
1457         }
1458         wpa_s->eapol_received++;
1459
1460         if (wpa_s->countermeasures) {
1461                 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1462                            "packet");
1463                 return;
1464         }
1465
1466         /* Source address of the incoming EAPOL frame could be compared to the
1467          * current BSSID. However, it is possible that a centralized
1468          * Authenticator could be using another MAC address than the BSSID of
1469          * an AP, so just allow any address to be used for now. The replies are
1470          * still sent to the current BSSID (if available), though. */
1471
1472         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1473         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1474             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1475                 return;
1476         wpa_drv_poll(wpa_s);
1477         if (!wpa_s->driver_4way_handshake)
1478                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1479         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1480                 /*
1481                  * Set portValid = TRUE here since we are going to skip 4-way
1482                  * handshake processing which would normally set portValid. We
1483                  * need this to allow the EAPOL state machines to be completed
1484                  * without going through EAPOL-Key handshake.
1485                  */
1486                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1487         }
1488 }
1489
1490
1491 void wpa_supplicant_sta_free_hw_features(struct wpa_hw_modes *hw_features,
1492                                          size_t num_hw_features)
1493 {
1494         ieee80211_sta_free_hw_features(hw_features, num_hw_features);
1495 }
1496
1497
1498 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1499                            struct ieee80211_rx_status *rx_status)
1500 {
1501         struct wpa_supplicant *wpa_s = ctx;
1502         ieee80211_sta_rx(wpa_s, buf, len, rx_status);
1503 }
1504
1505
1506 /**
1507  * wpa_supplicant_driver_init - Initialize driver interface parameters
1508  * @wpa_s: Pointer to wpa_supplicant data
1509  * Returns: 0 on success, -1 on failure
1510  *
1511  * This function is called to initialize driver interface parameters.
1512  * wpa_drv_init() must have been called before this function to initialize the
1513  * driver interface.
1514  */
1515 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1516 {
1517         static int interface_count = 0;
1518
1519         if (wpa_s->driver->send_eapol) {
1520                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1521                 if (addr)
1522                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1523         } else {
1524                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1525                                            wpa_drv_get_mac_addr(wpa_s),
1526                                            ETH_P_EAPOL,
1527                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1528                 if (wpa_s->l2 == NULL)
1529                         return -1;
1530         }
1531
1532         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1533                 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1534                 return -1;
1535         }
1536
1537         wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1538                    MAC2STR(wpa_s->own_addr));
1539
1540         if (wpa_s->bridge_ifname[0]) {
1541                 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1542                            " '%s'", wpa_s->bridge_ifname);
1543                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1544                                               wpa_s->own_addr,
1545                                               ETH_P_EAPOL,
1546                                               wpa_supplicant_rx_eapol, wpa_s,
1547                                               0);
1548                 if (wpa_s->l2_br == NULL) {
1549                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1550                                    "connection for the bridge interface '%s'",
1551                                    wpa_s->bridge_ifname);
1552                         return -1;
1553                 }
1554         }
1555
1556         /* Backwards compatibility call to set_wpa() handler. This is called
1557          * only just after init and just before deinit, so these handler can be
1558          * used to implement same functionality. */
1559         if (wpa_drv_set_wpa(wpa_s, 1) < 0) {
1560                 struct wpa_driver_capa capa;
1561                 if (wpa_drv_get_capa(wpa_s, &capa) < 0 ||
1562                     !(capa.flags & (WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1563                                     WPA_DRIVER_CAPA_KEY_MGMT_WPA2))) {
1564                         wpa_printf(MSG_DEBUG, "Driver does not support WPA.");
1565                         /* Continue to allow non-WPA modes to be used. */
1566                 } else {
1567                         wpa_printf(MSG_ERROR, "Failed to enable WPA in the "
1568                                 "driver.");
1569                         return -1;
1570                 }
1571         }
1572
1573         wpa_clear_keys(wpa_s, NULL);
1574
1575         /* Make sure that TKIP countermeasures are not left enabled (could
1576          * happen if wpa_supplicant is killed during countermeasures. */
1577         wpa_drv_set_countermeasures(wpa_s, 0);
1578
1579         wpa_drv_set_drop_unencrypted(wpa_s, 1);
1580
1581         wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1582         wpa_drv_flush_pmkid(wpa_s);
1583
1584         wpa_s->prev_scan_ssid = BROADCAST_SSID_SCAN;
1585         wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
1586         interface_count++;
1587
1588         return 0;
1589 }
1590
1591
1592 static int wpa_supplicant_daemon(const char *pid_file)
1593 {
1594         wpa_printf(MSG_DEBUG, "Daemonize..");
1595         return os_daemonize(pid_file);
1596 }
1597
1598
1599 static struct wpa_supplicant * wpa_supplicant_alloc(void)
1600 {
1601         struct wpa_supplicant *wpa_s;
1602
1603         wpa_s = os_zalloc(sizeof(*wpa_s));
1604         if (wpa_s == NULL)
1605                 return NULL;
1606         wpa_s->scan_req = 1;
1607
1608         return wpa_s;
1609 }
1610
1611
1612 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
1613                                      struct wpa_interface *iface)
1614 {
1615         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
1616                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
1617                    iface->confname ? iface->confname : "N/A",
1618                    iface->driver ? iface->driver : "default",
1619                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
1620                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
1621
1622         if (wpa_supplicant_set_driver(wpa_s, iface->driver) < 0) {
1623                 return -1;
1624         }
1625
1626         if (iface->confname) {
1627 #ifdef CONFIG_BACKEND_FILE
1628                 wpa_s->confname = os_rel2abs_path(iface->confname);
1629                 if (wpa_s->confname == NULL) {
1630                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
1631                                    "for configuration file '%s'.",
1632                                    iface->confname);
1633                         return -1;
1634                 }
1635                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
1636                            iface->confname, wpa_s->confname);
1637 #else /* CONFIG_BACKEND_FILE */
1638                 wpa_s->confname = os_strdup(iface->confname);
1639 #endif /* CONFIG_BACKEND_FILE */
1640                 wpa_s->conf = wpa_config_read(wpa_s->confname);
1641                 if (wpa_s->conf == NULL) {
1642                         wpa_printf(MSG_ERROR, "Failed to read or parse "
1643                                    "configuration '%s'.", wpa_s->confname);
1644                         return -1;
1645                 }
1646
1647                 /*
1648                  * Override ctrl_interface and driver_param if set on command
1649                  * line.
1650                  */
1651                 if (iface->ctrl_interface) {
1652                         os_free(wpa_s->conf->ctrl_interface);
1653                         wpa_s->conf->ctrl_interface =
1654                                 os_strdup(iface->ctrl_interface);
1655                 }
1656
1657                 if (iface->driver_param) {
1658                         os_free(wpa_s->conf->driver_param);
1659                         wpa_s->conf->driver_param =
1660                                 os_strdup(iface->driver_param);
1661                 }
1662         } else
1663                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
1664                                                      iface->driver_param);
1665
1666         if (wpa_s->conf == NULL) {
1667                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
1668                 return -1;
1669         }
1670
1671         if (iface->ifname == NULL) {
1672                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
1673                 return -1;
1674         }
1675         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
1676                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
1677                            iface->ifname);
1678                 return -1;
1679         }
1680         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
1681
1682         if (iface->bridge_ifname) {
1683                 if (os_strlen(iface->bridge_ifname) >=
1684                     sizeof(wpa_s->bridge_ifname)) {
1685                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
1686                                    "name '%s'.", iface->bridge_ifname);
1687                         return -1;
1688                 }
1689                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
1690                            sizeof(wpa_s->bridge_ifname));
1691         }
1692
1693         return 0;
1694 }
1695
1696
1697 static int wpa_supplicant_init_iface2(struct wpa_supplicant *wpa_s)
1698 {
1699         const char *ifname;
1700         struct wpa_driver_capa capa;
1701
1702         wpa_printf(MSG_DEBUG, "Initializing interface (2) '%s'",
1703                    wpa_s->ifname);
1704
1705         /* RSNA Supplicant Key Management - INITIALIZE */
1706         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1707         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1708
1709         /* Initialize driver interface and register driver event handler before
1710          * L2 receive handler so that association events are processed before
1711          * EAPOL-Key packets if both become available for the same select()
1712          * call. */
1713         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
1714         if (wpa_s->drv_priv == NULL) {
1715                 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
1716                 return -1;
1717         }
1718         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
1719                 wpa_printf(MSG_ERROR, "Driver interface rejected "
1720                            "driver_param '%s'", wpa_s->conf->driver_param);
1721                 return -1;
1722         }
1723
1724         ifname = wpa_drv_get_ifname(wpa_s);
1725         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
1726                 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
1727                            "name with '%s'", ifname);
1728                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
1729         }
1730
1731         if (wpa_supplicant_init_wpa(wpa_s) < 0)
1732                 return -1;
1733
1734         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
1735                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
1736                           NULL);
1737         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
1738
1739         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
1740             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
1741                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
1742                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1743                            "dot11RSNAConfigPMKLifetime");
1744                 return -1;
1745         }
1746
1747         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
1748             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
1749                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
1750                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1751                         "dot11RSNAConfigPMKReauthThreshold");
1752                 return -1;
1753         }
1754
1755         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
1756             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
1757                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
1758                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
1759                            "dot11RSNAConfigSATimeout");
1760                 return -1;
1761         }
1762
1763         if (wpa_supplicant_driver_init(wpa_s) < 0)
1764                 return -1;
1765
1766         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
1767
1768         if (wpa_supplicant_init_eapol(wpa_s) < 0)
1769                 return -1;
1770         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
1771
1772         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
1773         if (wpa_s->ctrl_iface == NULL) {
1774                 wpa_printf(MSG_ERROR,
1775                            "Failed to initialize control interface '%s'.\n"
1776                            "You may have another wpa_supplicant process "
1777                            "already running or the file was\n"
1778                            "left by an unclean termination of wpa_supplicant "
1779                            "in which case you will need\n"
1780                            "to manually remove this file before starting "
1781                            "wpa_supplicant again.\n",
1782                            wpa_s->conf->ctrl_interface);
1783                 return -1;
1784         }
1785
1786         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
1787                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1788                         wpa_s->use_client_mlme = 1;
1789                         if (ieee80211_sta_init(wpa_s))
1790                                 return -1;
1791                 }
1792                 if (capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE)
1793                         wpa_s->driver_4way_handshake = 1;
1794         }
1795
1796         return 0;
1797 }
1798
1799
1800 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s)
1801 {
1802         if (wpa_s->drv_priv) {
1803                 wpa_supplicant_deauthenticate(wpa_s,
1804                                               WLAN_REASON_DEAUTH_LEAVING);
1805
1806                 /* Backwards compatibility call to set_wpa() handler. This is
1807                  * called only just after init and just before deinit, so these
1808                  * handler can be used to implement same functionality. */
1809                 if (wpa_drv_set_wpa(wpa_s, 0) < 0) {
1810                         wpa_printf(MSG_ERROR, "Failed to disable WPA in the "
1811                                    "driver.");
1812                 }
1813
1814                 wpa_drv_set_drop_unencrypted(wpa_s, 0);
1815                 wpa_drv_set_countermeasures(wpa_s, 0);
1816                 wpa_clear_keys(wpa_s, NULL);
1817         }
1818
1819         wpas_dbus_unregister_iface(wpa_s);
1820
1821         wpa_supplicant_cleanup(wpa_s);
1822
1823         if (wpa_s->drv_priv)
1824                 wpa_drv_deinit(wpa_s);
1825 }
1826
1827
1828 /**
1829  * wpa_supplicant_add_iface - Add a new network interface
1830  * @global: Pointer to global data from wpa_supplicant_init()
1831  * @iface: Interface configuration options
1832  * Returns: Pointer to the created interface or %NULL on failure
1833  *
1834  * This function is used to add new network interfaces for %wpa_supplicant.
1835  * This can be called before wpa_supplicant_run() to add interfaces before the
1836  * main event loop has been started. In addition, new interfaces can be added
1837  * dynamically while %wpa_supplicant is already running. This could happen,
1838  * e.g., when a hotplug network adapter is inserted.
1839  */
1840 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
1841                                                  struct wpa_interface *iface)
1842 {
1843         struct wpa_supplicant *wpa_s;
1844
1845         if (global == NULL || iface == NULL)
1846                 return NULL;
1847
1848         wpa_s = wpa_supplicant_alloc();
1849         if (wpa_s == NULL)
1850                 return NULL;
1851
1852         if (wpa_supplicant_init_iface(wpa_s, iface) ||
1853             wpa_supplicant_init_iface2(wpa_s)) {
1854                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
1855                            iface->ifname);
1856                 wpa_supplicant_deinit_iface(wpa_s);
1857                 os_free(wpa_s);
1858                 return NULL;
1859         }
1860
1861         wpa_s->global = global;
1862
1863         /* Register the interface with the dbus control interface */
1864         if (wpas_dbus_register_iface(wpa_s)) {
1865                 wpa_supplicant_deinit_iface(wpa_s);
1866                 os_free(wpa_s);
1867                 return NULL;
1868         }
1869
1870         wpa_s->next = global->ifaces;
1871         global->ifaces = wpa_s;
1872
1873         wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
1874
1875         return wpa_s;
1876 }
1877
1878
1879 /**
1880  * wpa_supplicant_remove_iface - Remove a network interface
1881  * @global: Pointer to global data from wpa_supplicant_init()
1882  * @wpa_s: Pointer to the network interface to be removed
1883  * Returns: 0 if interface was removed, -1 if interface was not found
1884  *
1885  * This function can be used to dynamically remove network interfaces from
1886  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
1887  * addition, this function is used to remove all remaining interfaces when
1888  * %wpa_supplicant is terminated.
1889  */
1890 int wpa_supplicant_remove_iface(struct wpa_global *global,
1891                                 struct wpa_supplicant *wpa_s)
1892 {
1893         struct wpa_supplicant *prev;
1894
1895         /* Remove interface from the global list of interfaces */
1896         prev = global->ifaces;
1897         if (prev == wpa_s) {
1898                 global->ifaces = wpa_s->next;
1899         } else {
1900                 while (prev && prev->next != wpa_s)
1901                         prev = prev->next;
1902                 if (prev == NULL)
1903                         return -1;
1904                 prev->next = wpa_s->next;
1905         }
1906
1907         wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
1908
1909         wpa_supplicant_deinit_iface(wpa_s);
1910         os_free(wpa_s);
1911
1912         return 0;
1913 }
1914
1915
1916 /**
1917  * wpa_supplicant_get_iface - Get a new network interface
1918  * @global: Pointer to global data from wpa_supplicant_init()
1919  * @ifname: Interface name
1920  * Returns: Pointer to the interface or %NULL if not found
1921  */
1922 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
1923                                                  const char *ifname)
1924 {
1925         struct wpa_supplicant *wpa_s;
1926
1927         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
1928                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
1929                         return wpa_s;
1930         }
1931         return NULL;
1932 }
1933
1934
1935 /**
1936  * wpa_supplicant_init - Initialize %wpa_supplicant
1937  * @params: Parameters for %wpa_supplicant
1938  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
1939  *
1940  * This function is used to initialize %wpa_supplicant. After successful
1941  * initialization, the returned data pointer can be used to add and remove
1942  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
1943  */
1944 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
1945 {
1946         struct wpa_global *global;
1947         int ret;
1948
1949         if (params == NULL)
1950                 return NULL;
1951
1952         wpa_debug_open_file(params->wpa_debug_file_path);
1953
1954         ret = eap_peer_register_methods();
1955         if (ret) {
1956                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
1957                 if (ret == -2)
1958                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
1959                                    "the same EAP type.");
1960                 return NULL;
1961         }
1962
1963         global = os_zalloc(sizeof(*global));
1964         if (global == NULL)
1965                 return NULL;
1966         global->params.daemonize = params->daemonize;
1967         global->params.wait_for_monitor = params->wait_for_monitor;
1968         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
1969         if (params->pid_file)
1970                 global->params.pid_file = os_strdup(params->pid_file);
1971         if (params->ctrl_interface)
1972                 global->params.ctrl_interface =
1973                         os_strdup(params->ctrl_interface);
1974         wpa_debug_level = global->params.wpa_debug_level =
1975                 params->wpa_debug_level;
1976         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
1977                 params->wpa_debug_show_keys;
1978         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
1979                 params->wpa_debug_timestamp;
1980
1981         if (eloop_init(global)) {
1982                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
1983                 wpa_supplicant_deinit(global);
1984                 return NULL;
1985         }
1986
1987         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
1988         if (global->ctrl_iface == NULL) {
1989                 wpa_supplicant_deinit(global);
1990                 return NULL;
1991         }
1992
1993         if (global->params.dbus_ctrl_interface) {
1994                 global->dbus_ctrl_iface =
1995                         wpa_supplicant_dbus_ctrl_iface_init(global);
1996                 if (global->dbus_ctrl_iface == NULL) {
1997                         wpa_supplicant_deinit(global);
1998                         return NULL;
1999                 }
2000         }
2001
2002         return global;
2003 }
2004
2005
2006 /**
2007  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2008  * @global: Pointer to global data from wpa_supplicant_init()
2009  * Returns: 0 after successful event loop run, -1 on failure
2010  *
2011  * This function starts the main event loop and continues running as long as
2012  * there are any remaining events. In most cases, this function is running as
2013  * long as the %wpa_supplicant process in still in use.
2014  */
2015 int wpa_supplicant_run(struct wpa_global *global)
2016 {
2017         struct wpa_supplicant *wpa_s;
2018
2019         if (global->params.daemonize &&
2020             wpa_supplicant_daemon(global->params.pid_file))
2021                 return -1;
2022
2023         if (global->params.wait_for_monitor) {
2024                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2025                         if (wpa_s->ctrl_iface)
2026                                 wpa_supplicant_ctrl_iface_wait(
2027                                         wpa_s->ctrl_iface);
2028         }
2029
2030         eloop_register_signal_terminate(wpa_supplicant_terminate, NULL);
2031         eloop_register_signal_reconfig(wpa_supplicant_reconfig, NULL);
2032
2033         eloop_run();
2034
2035         return 0;
2036 }
2037
2038
2039 /**
2040  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2041  * @global: Pointer to global data from wpa_supplicant_init()
2042  *
2043  * This function is called to deinitialize %wpa_supplicant and to free all
2044  * allocated resources. Remaining network interfaces will also be removed.
2045  */
2046 void wpa_supplicant_deinit(struct wpa_global *global)
2047 {
2048         if (global == NULL)
2049                 return;
2050
2051         while (global->ifaces)
2052                 wpa_supplicant_remove_iface(global, global->ifaces);
2053
2054         if (global->ctrl_iface)
2055                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2056         if (global->dbus_ctrl_iface)
2057                 wpa_supplicant_dbus_ctrl_iface_deinit(global->dbus_ctrl_iface);
2058
2059         eap_peer_unregister_methods();
2060
2061         eloop_destroy();
2062
2063         if (global->params.pid_file) {
2064                 os_daemonize_terminate(global->params.pid_file);
2065                 os_free(global->params.pid_file);
2066         }
2067         os_free(global->params.ctrl_interface);
2068
2069         os_free(global);
2070         wpa_debug_close_file();
2071 }