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 "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 "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 #include "wps_supplicant.h"
  42 #include "ibss_rsn.h"
  43 #include "sme.h"
  44 #include "ap.h"
  45 #include "notify.h"
  46 #include "bgscan.h"
  47
  48 const char *wpa_supplicant_version =
  49 "wpa_supplicant v" VERSION_STR "\n"
  50 "Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi> and contributors";
  51
  52 const char *wpa_supplicant_license =
  53 "This program is free software. You can distribute it and/or modify it\n"
  54 "under the terms of the GNU General Public License version 2.\n"
  55 "\n"
  56 "Alternatively, this software may be distributed under the terms of the\n"
  57 "BSD license. See README and COPYING for more details.\n"
  58 #ifdef EAP_TLS_OPENSSL
  59 "\nThis product includes software developed by the OpenSSL Project\n"
  60 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
  61 #endif /* EAP_TLS_OPENSSL */
  62 ;
  63
  64 #ifndef CONFIG_NO_STDOUT_DEBUG
  65 /* Long text divided into parts in order to fit in C89 strings size limits. */
  66 const char *wpa_supplicant_full_license1 =
  67 "This program is free software; you can redistribute it and/or modify\n"
  68 "it under the terms of the GNU General Public License version 2 as\n"
  69 "published by the Free Software Foundation.\n"
  70 "\n"
  71 "This program is distributed in the hope that it will be useful,\n"
  72 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
  73 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
  74 "GNU General Public License for more details.\n"
  75 "\n";
  76 const char *wpa_supplicant_full_license2 =
  77 "You should have received a copy of the GNU General Public License\n"
  78 "along with this program; if not, write to the Free Software\n"
  79 "Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA\n"
  80 "\n"
  81 "Alternatively, this software may be distributed under the terms of the\n"
  82 "BSD license.\n"
  83 "\n"
  84 "Redistribution and use in source and binary forms, with or without\n"
  85 "modification, are permitted provided that the following conditions are\n"
  86 "met:\n"
  87 "\n";
  88 const char *wpa_supplicant_full_license3 =
  89 "1. Redistributions of source code must retain the above copyright\n"
  90 "   notice, this list of conditions and the following disclaimer.\n"
  91 "\n"
  92 "2. Redistributions in binary form must reproduce the above copyright\n"
  93 "   notice, this list of conditions and the following disclaimer in the\n"
  94 "   documentation and/or other materials provided with the distribution.\n"
  95 "\n";
  96 const char *wpa_supplicant_full_license4 =
  97 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
  98 "   names of its contributors may be used to endorse or promote products\n"
  99 "   derived from this software without specific prior written permission.\n"
 100 "\n"
 101 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
 102 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
 103 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
 104 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
 105 const char *wpa_supplicant_full_license5 =
 106 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
 107 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
 108 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
 109 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
 110 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
 111 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
 112 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
 113 "\n";
 114 #endif /* CONFIG_NO_STDOUT_DEBUG */
 115
 116 extern int wpa_debug_level;
 117 extern int wpa_debug_show_keys;
 118 extern int wpa_debug_timestamp;
 119 extern struct wpa_driver_ops *wpa_drivers[];
 120
 121 /* Configure default/group WEP keys for static WEP */
 122 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 123 {
 124         int i, set = 0;
 125
 126         for (i = 0; i < NUM_WEP_KEYS; i++) {
 127                 if (ssid->wep_key_len[i] == 0)
 128                         continue;
 129
 130                 set = 1;
 131                 wpa_drv_set_key(wpa_s, WPA_ALG_WEP,
 132                                 (u8 *) "\xff\xff\xff\xff\xff\xff",
 133                                 i, i == ssid->wep_tx_keyidx, (u8 *) "", 0,
 134                                 ssid->wep_key[i], ssid->wep_key_len[i]);
 135         }
 136
 137         return set;
 138 }
 139
 140
 141 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
 142                                            struct wpa_ssid *ssid)
 143 {
 144         u8 key[32];
 145         size_t keylen;
 146         wpa_alg alg;
 147         u8 seq[6] = { 0 };
 148
 149         /* IBSS/WPA-None uses only one key (Group) for both receiving and
 150          * sending unicast and multicast packets. */
 151
 152         if (ssid->mode != IEEE80211_MODE_IBSS) {
 153                 wpa_printf(MSG_INFO, "WPA: Invalid mode %d (not IBSS/ad-hoc) "
 154                            "for WPA-None", ssid->mode);
 155                 return -1;
 156         }
 157
 158         if (!ssid->psk_set) {
 159                 wpa_printf(MSG_INFO, "WPA: No PSK configured for WPA-None");
 160                 return -1;
 161         }
 162
 163         switch (wpa_s->group_cipher) {
 164         case WPA_CIPHER_CCMP:
 165                 os_memcpy(key, ssid->psk, 16);
 166                 keylen = 16;
 167                 alg = WPA_ALG_CCMP;
 168                 break;
 169         case WPA_CIPHER_TKIP:
 170                 /* WPA-None uses the same Michael MIC key for both TX and RX */
 171                 os_memcpy(key, ssid->psk, 16 + 8);
 172                 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
 173                 keylen = 32;
 174                 alg = WPA_ALG_TKIP;
 175                 break;
 176         default:
 177                 wpa_printf(MSG_INFO, "WPA: Invalid group cipher %d for "
 178                            "WPA-None", wpa_s->group_cipher);
 179                 return -1;
 180         }
 181
 182         /* TODO: should actually remember the previously used seq#, both for TX
 183          * and RX from each STA.. */
 184
 185         return wpa_drv_set_key(wpa_s, alg, (u8 *) "\xff\xff\xff\xff\xff\xff",
 186                                0, 1, seq, 6, key, keylen);
 187 }
 188
 189
 190 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
 191 {
 192         struct wpa_supplicant *wpa_s = eloop_ctx;
 193         const u8 *bssid = wpa_s->bssid;
 194         if (is_zero_ether_addr(bssid))
 195                 bssid = wpa_s->pending_bssid;
 196         wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
 197                 MAC2STR(bssid));
 198         wpa_blacklist_add(wpa_s, bssid);
 199         wpa_sm_notify_disassoc(wpa_s->wpa);
 200         wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 201         wpa_s->reassociate = 1;
 202         wpa_supplicant_req_scan(wpa_s, 0, 0);
 203 }
 204
 205
 206 /**
 207  * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
 208  * @wpa_s: Pointer to wpa_supplicant data
 209  * @sec: Number of seconds after which to time out authentication
 210  * @usec: Number of microseconds after which to time out authentication
 211  *
 212  * This function is used to schedule a timeout for the current authentication
 213  * attempt.
 214  */
 215 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
 216                                      int sec, int usec)
 217 {
 218         if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
 219             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 220                 return;
 221
 222         wpa_msg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
 223                 "%d usec", sec, usec);
 224         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 225         eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
 226 }
 227
 228
 229 /**
 230  * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
 231  * @wpa_s: Pointer to wpa_supplicant data
 232  *
 233  * This function is used to cancel authentication timeout scheduled with
 234  * wpa_supplicant_req_auth_timeout() and it is called when authentication has
 235  * been completed.
 236  */
 237 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
 238 {
 239         wpa_msg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
 240         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 241         wpa_blacklist_del(wpa_s, wpa_s->bssid);
 242 }
 243
 244
 245 /**
 246  * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
 247  * @wpa_s: Pointer to wpa_supplicant data
 248  *
 249  * This function is used to configure EAPOL state machine based on the selected
 250  * authentication mode.
 251  */
 252 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
 253 {
 254 #ifdef IEEE8021X_EAPOL
 255         struct eapol_config eapol_conf;
 256         struct wpa_ssid *ssid = wpa_s->current_ssid;
 257
 258 #ifdef CONFIG_IBSS_RSN
 259         if (ssid->mode == IEEE80211_MODE_IBSS &&
 260             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
 261             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
 262                 /*
 263                  * RSN IBSS authentication is per-STA and we can disable the
 264                  * per-BSSID EAPOL authentication.
 265                  */
 266                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 267                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 268                 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 269                 return;
 270         }
 271 #endif /* CONFIG_IBSS_RSN */
 272
 273         eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 274         eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 275
 276         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 277             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 278                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 279         else
 280                 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
 281
 282         os_memset(&eapol_conf, 0, sizeof(eapol_conf));
 283         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 284                 eapol_conf.accept_802_1x_keys = 1;
 285                 eapol_conf.required_keys = 0;
 286                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
 287                         eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
 288                 }
 289                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
 290                         eapol_conf.required_keys |=
 291                                 EAPOL_REQUIRE_KEY_BROADCAST;
 292                 }
 293
 294                 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 295                         eapol_conf.required_keys = 0;
 296         }
 297         if (wpa_s->conf)
 298                 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
 299         eapol_conf.workaround = ssid->eap_workaround;
 300         eapol_conf.eap_disabled =
 301                 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
 302                 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 303                 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
 304         eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
 305 #endif /* IEEE8021X_EAPOL */
 306 }
 307
 308
 309 /**
 310  * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
 311  * @wpa_s: Pointer to wpa_supplicant data
 312  * @ssid: Configuration data for the network
 313  *
 314  * This function is used to configure WPA state machine and related parameters
 315  * to a mode where WPA is not enabled. This is called as part of the
 316  * authentication configuration when the selected network does not use WPA.
 317  */
 318 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 319                                        struct wpa_ssid *ssid)
 320 {
 321         int i;
 322
 323         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 324                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
 325         else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
 326                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 327         else
 328                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 329         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 330         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 331         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 332         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 333         wpa_s->group_cipher = WPA_CIPHER_NONE;
 334         wpa_s->mgmt_group_cipher = 0;
 335
 336         for (i = 0; i < NUM_WEP_KEYS; i++) {
 337                 if (ssid->wep_key_len[i] > 5) {
 338                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
 339                         wpa_s->group_cipher = WPA_CIPHER_WEP104;
 340                         break;
 341                 } else if (ssid->wep_key_len[i] > 0) {
 342                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
 343                         wpa_s->group_cipher = WPA_CIPHER_WEP40;
 344                         break;
 345                 }
 346         }
 347
 348         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
 349         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 350         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 351                          wpa_s->pairwise_cipher);
 352         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 353 #ifdef CONFIG_IEEE80211W
 354         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 355                          wpa_s->mgmt_group_cipher);
 356 #endif /* CONFIG_IEEE80211W */
 357
 358         pmksa_cache_clear_current(wpa_s->wpa);
 359 }
 360
 361
 362 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 363 {
 364         bgscan_deinit(wpa_s);
 365         scard_deinit(wpa_s->scard);
 366         wpa_s->scard = NULL;
 367         wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
 368         eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
 369         l2_packet_deinit(wpa_s->l2);
 370         wpa_s->l2 = NULL;
 371         if (wpa_s->l2_br) {
 372                 l2_packet_deinit(wpa_s->l2_br);
 373                 wpa_s->l2_br = NULL;
 374         }
 375
 376         if (wpa_s->ctrl_iface) {
 377                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 378                 wpa_s->ctrl_iface = NULL;
 379         }
 380         if (wpa_s->conf != NULL) {
 381                 wpa_config_free(wpa_s->conf);
 382                 wpa_s->conf = NULL;
 383         }
 384
 385         os_free(wpa_s->confname);
 386         wpa_s->confname = NULL;
 387
 388         wpa_sm_set_eapol(wpa_s->wpa, NULL);
 389         eapol_sm_deinit(wpa_s->eapol);
 390         wpa_s->eapol = NULL;
 391
 392         rsn_preauth_deinit(wpa_s->wpa);
 393
 394         pmksa_candidate_free(wpa_s->wpa);
 395         wpa_sm_deinit(wpa_s->wpa);
 396         wpa_s->wpa = NULL;
 397         wpa_blacklist_clear(wpa_s);
 398
 399         wpa_scan_results_free(wpa_s->scan_res);
 400         wpa_s->scan_res = NULL;
 401
 402         wpa_supplicant_cancel_scan(wpa_s);
 403         wpa_supplicant_cancel_auth_timeout(wpa_s);
 404
 405         ieee80211_sta_deinit(wpa_s);
 406
 407         wpas_wps_deinit(wpa_s);
 408
 409         wpabuf_free(wpa_s->pending_eapol_rx);
 410         wpa_s->pending_eapol_rx = NULL;
 411
 412 #ifdef CONFIG_IBSS_RSN
 413         ibss_rsn_deinit(wpa_s->ibss_rsn);
 414         wpa_s->ibss_rsn = NULL;
 415 #endif /* CONFIG_IBSS_RSN */
 416
 417 #ifdef CONFIG_SME
 418         os_free(wpa_s->sme.ft_ies);
 419         wpa_s->sme.ft_ies = NULL;
 420         wpa_s->sme.ft_ies_len = 0;
 421 #endif /* CONFIG_SME */
 422
 423 #ifdef CONFIG_AP
 424         wpa_supplicant_ap_deinit(wpa_s);
 425 #endif /* CONFIG_AP */
 426 }
 427
 428
 429 /**
 430  * wpa_clear_keys - Clear keys configured for the driver
 431  * @wpa_s: Pointer to wpa_supplicant data
 432  * @addr: Previously used BSSID or %NULL if not available
 433  *
 434  * This function clears the encryption keys that has been previously configured
 435  * for the driver.
 436  */
 437 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
 438 {
 439         u8 *bcast = (u8 *) "\xff\xff\xff\xff\xff\xff";
 440
 441         if (wpa_s->keys_cleared) {
 442                 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
 443                  * timing issues with keys being cleared just before new keys
 444                  * are set or just after association or something similar. This
 445                  * shows up in group key handshake failing often because of the
 446                  * client not receiving the first encrypted packets correctly.
 447                  * Skipping some of the extra key clearing steps seems to help
 448                  * in completing group key handshake more reliably. */
 449                 wpa_printf(MSG_DEBUG, "No keys have been configured - "
 450                            "skip key clearing");
 451                 return;
 452         }
 453
 454         /* MLME-DELETEKEYS.request */
 455         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 0, 0, NULL, 0, NULL, 0);
 456         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 1, 0, NULL, 0, NULL, 0);
 457         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 2, 0, NULL, 0, NULL, 0);
 458         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 3, 0, NULL, 0, NULL, 0);
 459 #ifdef CONFIG_IEEE80211W
 460         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 4, 0, NULL, 0, NULL, 0);
 461         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, bcast, 5, 0, NULL, 0, NULL, 0);
 462 #endif /* CONFIG_IEEE80211W */
 463         if (addr) {
 464                 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
 465                                 0);
 466                 /* MLME-SETPROTECTION.request(None) */
 467                 wpa_drv_mlme_setprotection(
 468                         wpa_s, addr,
 469                         MLME_SETPROTECTION_PROTECT_TYPE_NONE,
 470                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 471         }
 472         wpa_s->keys_cleared = 1;
 473 }
 474
 475
 476 /**
 477  * wpa_supplicant_state_txt - Get the connection state name as a text string
 478  * @state: State (wpa_state; WPA_*)
 479  * Returns: The state name as a printable text string
 480  */
 481 const char * wpa_supplicant_state_txt(int state)
 482 {
 483         switch (state) {
 484         case WPA_DISCONNECTED:
 485                 return "DISCONNECTED";
 486         case WPA_INACTIVE:
 487                 return "INACTIVE";
 488         case WPA_SCANNING:
 489                 return "SCANNING";
 490         case WPA_AUTHENTICATING:
 491                 return "AUTHENTICATING";
 492         case WPA_ASSOCIATING:
 493                 return "ASSOCIATING";
 494         case WPA_ASSOCIATED:
 495                 return "ASSOCIATED";
 496         case WPA_4WAY_HANDSHAKE:
 497                 return "4WAY_HANDSHAKE";
 498         case WPA_GROUP_HANDSHAKE:
 499                 return "GROUP_HANDSHAKE";
 500         case WPA_COMPLETED:
 501                 return "COMPLETED";
 502         default:
 503                 return "UNKNOWN";
 504         }
 505 }
 506
 507
 508 /**
 509  * wpa_supplicant_set_state - Set current connection state
 510  * @wpa_s: Pointer to wpa_supplicant data
 511  * @state: The new connection state
 512  *
 513  * This function is called whenever the connection state changes, e.g.,
 514  * association is completed for WPA/WPA2 4-Way Handshake is started.
 515  */
 516 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s, wpa_states state)
 517 {
 518         wpa_printf(MSG_DEBUG, "State: %s -> %s",
 519                    wpa_supplicant_state_txt(wpa_s->wpa_state),
 520                    wpa_supplicant_state_txt(state));
 521
 522         if (state != WPA_SCANNING)
 523                 wpa_supplicant_notify_scanning(wpa_s, 0);
 524
 525         wpas_notify_state_changed(wpa_s, state, wpa_s->wpa_state);
 526
 527         if (state == WPA_COMPLETED && wpa_s->new_connection) {
 528 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
 529                 struct wpa_ssid *ssid = wpa_s->current_ssid;
 530                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
 531                         MACSTR " completed %s [id=%d id_str=%s]",
 532                         MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
 533                         "(reauth)" : "(auth)",
 534                         ssid ? ssid->id : -1,
 535                         ssid && ssid->id_str ? ssid->id_str : "");
 536 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
 537                 wpa_s->new_connection = 0;
 538                 wpa_s->reassociated_connection = 1;
 539                 wpa_drv_set_operstate(wpa_s, 1);
 540         } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 541                    state == WPA_ASSOCIATED) {
 542                 wpa_s->new_connection = 1;
 543                 wpa_drv_set_operstate(wpa_s, 0);
 544         }
 545         wpa_s->wpa_state = state;
 546 }
 547
 548
 549 static void wpa_supplicant_terminate(int sig, void *eloop_ctx,
 550                                      void *signal_ctx)
 551 {
 552         struct wpa_global *global = eloop_ctx;
 553         struct wpa_supplicant *wpa_s;
 554         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 555                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING "- signal %d "
 556                         "received", sig);
 557         }
 558         eloop_terminate();
 559 }
 560
 561
 562 static void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
 563 {
 564         wpa_states old_state = wpa_s->wpa_state;
 565         wpa_s->pairwise_cipher = 0;
 566         wpa_s->group_cipher = 0;
 567         wpa_s->mgmt_group_cipher = 0;
 568         wpa_s->key_mgmt = 0;
 569         wpa_s->wpa_state = WPA_DISCONNECTED;
 570         wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
 571 }
 572
 573
 574 /**
 575  * wpa_supplicant_reload_configuration - Reload configuration data
 576  * @wpa_s: Pointer to wpa_supplicant data
 577  * Returns: 0 on success or -1 if configuration parsing failed
 578  *
 579  * This function can be used to request that the configuration data is reloaded
 580  * (e.g., after configuration file change). This function is reloading
 581  * configuration only for one interface, so this may need to be called multiple
 582  * times if %wpa_supplicant is controlling multiple interfaces and all
 583  * interfaces need reconfiguration.
 584  */
 585 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
 586 {
 587         struct wpa_config *conf;
 588         struct wpa_ssid *old_ssid;
 589         int reconf_ctrl;
 590         int old_ap_scan;
 591
 592         if (wpa_s->confname == NULL)
 593                 return -1;
 594         conf = wpa_config_read(wpa_s->confname);
 595         if (conf == NULL) {
 596                 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
 597                         "file '%s' - exiting", wpa_s->confname);
 598                 return -1;
 599         }
 600
 601         reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
 602                 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
 603                     os_strcmp(conf->ctrl_interface,
 604                               wpa_s->conf->ctrl_interface) != 0);
 605
 606         if (reconf_ctrl && wpa_s->ctrl_iface) {
 607                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 608                 wpa_s->ctrl_iface = NULL;
 609         }
 610
 611         eapol_sm_invalidate_cached_session(wpa_s->eapol);
 612         old_ssid = wpa_s->current_ssid;
 613         wpa_s->current_ssid = NULL;
 614         if (old_ssid != wpa_s->current_ssid)
 615                 wpas_notify_network_changed(wpa_s);
 616
 617         /*
 618          * TODO: should notify EAPOL SM about changes in opensc_engine_path,
 619          * pkcs11_engine_path, pkcs11_module_path.
 620          */
 621         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 622                 /*
 623                  * Clear forced success to clear EAP state for next
 624                  * authentication.
 625                  */
 626                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 627         }
 628         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 629         wpa_sm_set_config(wpa_s->wpa, NULL);
 630         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
 631         rsn_preauth_deinit(wpa_s->wpa);
 632
 633         old_ap_scan = wpa_s->conf->ap_scan;
 634         wpa_config_free(wpa_s->conf);
 635         wpa_s->conf = conf;
 636         if (old_ap_scan != wpa_s->conf->ap_scan)
 637                 wpas_notify_ap_scan_changed(wpa_s);
 638
 639         if (reconf_ctrl)
 640                 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
 641
 642         wpa_supplicant_clear_status(wpa_s);
 643         wpa_s->reassociate = 1;
 644         wpa_supplicant_req_scan(wpa_s, 0, 0);
 645         wpa_msg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
 646         return 0;
 647 }
 648
 649
 650 static void wpa_supplicant_reconfig(int sig, void *eloop_ctx,
 651                                     void *signal_ctx)
 652 {
 653         struct wpa_global *global = eloop_ctx;
 654         struct wpa_supplicant *wpa_s;
 655         wpa_printf(MSG_DEBUG, "Signal %d received - reconfiguring", sig);
 656         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 657                 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
 658                         eloop_terminate();
 659                 }
 660         }
 661 }
 662
 663
 664 static wpa_cipher cipher_suite2driver(int cipher)
 665 {
 666         switch (cipher) {
 667         case WPA_CIPHER_NONE:
 668                 return CIPHER_NONE;
 669         case WPA_CIPHER_WEP40:
 670                 return CIPHER_WEP40;
 671         case WPA_CIPHER_WEP104:
 672                 return CIPHER_WEP104;
 673         case WPA_CIPHER_CCMP:
 674                 return CIPHER_CCMP;
 675         case WPA_CIPHER_TKIP:
 676         default:
 677                 return CIPHER_TKIP;
 678         }
 679 }
 680
 681
 682 static wpa_key_mgmt key_mgmt2driver(int key_mgmt)
 683 {
 684         switch (key_mgmt) {
 685         case WPA_KEY_MGMT_NONE:
 686                 return KEY_MGMT_NONE;
 687         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
 688                 return KEY_MGMT_802_1X_NO_WPA;
 689         case WPA_KEY_MGMT_IEEE8021X:
 690                 return KEY_MGMT_802_1X;
 691         case WPA_KEY_MGMT_WPA_NONE:
 692                 return KEY_MGMT_WPA_NONE;
 693         case WPA_KEY_MGMT_FT_IEEE8021X:
 694                 return KEY_MGMT_FT_802_1X;
 695         case WPA_KEY_MGMT_FT_PSK:
 696                 return KEY_MGMT_FT_PSK;
 697         case WPA_KEY_MGMT_IEEE8021X_SHA256:
 698                 return KEY_MGMT_802_1X_SHA256;
 699         case WPA_KEY_MGMT_PSK_SHA256:
 700                 return KEY_MGMT_PSK_SHA256;
 701         case WPA_KEY_MGMT_WPS:
 702                 return KEY_MGMT_WPS;
 703         case WPA_KEY_MGMT_PSK:
 704         default:
 705                 return KEY_MGMT_PSK;
 706         }
 707 }
 708
 709
 710 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
 711                                          struct wpa_ssid *ssid,
 712                                          struct wpa_ie_data *ie)
 713 {
 714         int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
 715         if (ret) {
 716                 if (ret == -2) {
 717                         wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
 718                                 "from association info");
 719                 }
 720                 return -1;
 721         }
 722
 723         wpa_printf(MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set cipher "
 724                    "suites");
 725         if (!(ie->group_cipher & ssid->group_cipher)) {
 726                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
 727                         "cipher 0x%x (mask 0x%x) - reject",
 728                         ie->group_cipher, ssid->group_cipher);
 729                 return -1;
 730         }
 731         if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
 732                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
 733                         "cipher 0x%x (mask 0x%x) - reject",
 734                         ie->pairwise_cipher, ssid->pairwise_cipher);
 735                 return -1;
 736         }
 737         if (!(ie->key_mgmt & ssid->key_mgmt)) {
 738                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
 739                         "management 0x%x (mask 0x%x) - reject",
 740                         ie->key_mgmt, ssid->key_mgmt);
 741                 return -1;
 742         }
 743
 744 #ifdef CONFIG_IEEE80211W
 745         if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
 746             ssid->ieee80211w == IEEE80211W_REQUIRED) {
 747                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
 748                         "that does not support management frame protection - "
 749                         "reject");
 750                 return -1;
 751         }
 752 #endif /* CONFIG_IEEE80211W */
 753
 754         return 0;
 755 }
 756
 757
 758 /**
 759  * wpa_supplicant_set_suites - Set authentication and encryption parameters
 760  * @wpa_s: Pointer to wpa_supplicant data
 761  * @bss: Scan results for the selected BSS, or %NULL if not available
 762  * @ssid: Configuration data for the selected network
 763  * @wpa_ie: Buffer for the WPA/RSN IE
 764  * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
 765  * used buffer length in case the functions returns success.
 766  * Returns: 0 on success or -1 on failure
 767  *
 768  * This function is used to configure authentication and encryption parameters
 769  * based on the network configuration and scan result for the selected BSS (if
 770  * available).
 771  */
 772 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 773                               struct wpa_scan_res *bss,
 774                               struct wpa_ssid *ssid,
 775                               u8 *wpa_ie, size_t *wpa_ie_len)
 776 {
 777         struct wpa_ie_data ie;
 778         int sel, proto;
 779         const u8 *bss_wpa, *bss_rsn;
 780
 781         if (bss) {
 782                 bss_wpa = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 783                 bss_rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 784         } else
 785                 bss_wpa = bss_rsn = NULL;
 786
 787         if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
 788             wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
 789             (ie.group_cipher & ssid->group_cipher) &&
 790             (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 791             (ie.key_mgmt & ssid->key_mgmt)) {
 792                 wpa_msg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
 793                 proto = WPA_PROTO_RSN;
 794         } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
 795                    wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
 796                    (ie.group_cipher & ssid->group_cipher) &&
 797                    (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 798                    (ie.key_mgmt & ssid->key_mgmt)) {
 799                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
 800                 proto = WPA_PROTO_WPA;
 801         } else if (bss) {
 802                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
 803                 return -1;
 804         } else {
 805                 if (ssid->proto & WPA_PROTO_RSN)
 806                         proto = WPA_PROTO_RSN;
 807                 else
 808                         proto = WPA_PROTO_WPA;
 809                 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
 810                         os_memset(&ie, 0, sizeof(ie));
 811                         ie.group_cipher = ssid->group_cipher;
 812                         ie.pairwise_cipher = ssid->pairwise_cipher;
 813                         ie.key_mgmt = ssid->key_mgmt;
 814 #ifdef CONFIG_IEEE80211W
 815                         ie.mgmt_group_cipher =
 816                                 ssid->ieee80211w != NO_IEEE80211W ?
 817                                 WPA_CIPHER_AES_128_CMAC : 0;
 818 #endif /* CONFIG_IEEE80211W */
 819                         wpa_printf(MSG_DEBUG, "WPA: Set cipher suites based "
 820                                    "on configuration");
 821                 } else
 822                         proto = ie.proto;
 823         }
 824
 825         wpa_printf(MSG_DEBUG, "WPA: Selected cipher suites: group %d "
 826                    "pairwise %d key_mgmt %d proto %d",
 827                    ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
 828 #ifdef CONFIG_IEEE80211W
 829         if (ssid->ieee80211w) {
 830                 wpa_printf(MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
 831                            ie.mgmt_group_cipher);
 832         }
 833 #endif /* CONFIG_IEEE80211W */
 834
 835         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
 836         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
 837                          !!(ssid->proto & WPA_PROTO_RSN));
 838
 839         if (bss || !wpa_s->ap_ies_from_associnfo) {
 840                 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
 841                                          bss_wpa ? 2 + bss_wpa[1] : 0) ||
 842                     wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
 843                                          bss_rsn ? 2 + bss_rsn[1] : 0))
 844                         return -1;
 845         }
 846
 847         sel = ie.group_cipher & ssid->group_cipher;
 848         if (sel & WPA_CIPHER_CCMP) {
 849                 wpa_s->group_cipher = WPA_CIPHER_CCMP;
 850                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
 851         } else if (sel & WPA_CIPHER_TKIP) {
 852                 wpa_s->group_cipher = WPA_CIPHER_TKIP;
 853                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
 854         } else if (sel & WPA_CIPHER_WEP104) {
 855                 wpa_s->group_cipher = WPA_CIPHER_WEP104;
 856                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
 857         } else if (sel & WPA_CIPHER_WEP40) {
 858                 wpa_s->group_cipher = WPA_CIPHER_WEP40;
 859                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
 860         } else {
 861                 wpa_printf(MSG_WARNING, "WPA: Failed to select group cipher.");
 862                 return -1;
 863         }
 864
 865         sel = ie.pairwise_cipher & ssid->pairwise_cipher;
 866         if (sel & WPA_CIPHER_CCMP) {
 867                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 868                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
 869         } else if (sel & WPA_CIPHER_TKIP) {
 870                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 871                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
 872         } else if (sel & WPA_CIPHER_NONE) {
 873                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 874                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
 875         } else {
 876                 wpa_printf(MSG_WARNING, "WPA: Failed to select pairwise "
 877                            "cipher.");
 878                 return -1;
 879         }
 880
 881         sel = ie.key_mgmt & ssid->key_mgmt;
 882         if (0) {
 883 #ifdef CONFIG_IEEE80211R
 884         } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
 885                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
 886                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
 887         } else if (sel & WPA_KEY_MGMT_FT_PSK) {
 888                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
 889                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
 890 #endif /* CONFIG_IEEE80211R */
 891 #ifdef CONFIG_IEEE80211W
 892         } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
 893                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
 894                 wpa_msg(wpa_s, MSG_DEBUG,
 895                         "WPA: using KEY_MGMT 802.1X with SHA256");
 896         } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
 897                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
 898                 wpa_msg(wpa_s, MSG_DEBUG,
 899                         "WPA: using KEY_MGMT PSK with SHA256");
 900 #endif /* CONFIG_IEEE80211W */
 901         } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
 902                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 903                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
 904         } else if (sel & WPA_KEY_MGMT_PSK) {
 905                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
 906                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
 907         } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
 908                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
 909                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
 910         } else {
 911                 wpa_printf(MSG_WARNING, "WPA: Failed to select authenticated "
 912                            "key management type.");
 913                 return -1;
 914         }
 915
 916         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 917         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 918                          wpa_s->pairwise_cipher);
 919         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 920
 921 #ifdef CONFIG_IEEE80211W
 922         sel = ie.mgmt_group_cipher;
 923         if (ssid->ieee80211w == NO_IEEE80211W ||
 924             !(ie.capabilities & WPA_CAPABILITY_MFPC))
 925                 sel = 0;
 926         if (sel & WPA_CIPHER_AES_128_CMAC) {
 927                 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
 928                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
 929                         "AES-128-CMAC");
 930         } else {
 931                 wpa_s->mgmt_group_cipher = 0;
 932                 wpa_msg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
 933         }
 934         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 935                          wpa_s->mgmt_group_cipher);
 936 #endif /* CONFIG_IEEE80211W */
 937
 938         if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
 939                 wpa_printf(MSG_WARNING, "WPA: Failed to generate WPA IE.");
 940                 return -1;
 941         }
 942
 943         if (ssid->key_mgmt &
 944             (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_PSK_SHA256))
 945                 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
 946         else
 947                 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
 948
 949         return 0;
 950 }
 951
 952
 953 /**
 954  * wpa_supplicant_associate - Request association
 955  * @wpa_s: Pointer to wpa_supplicant data
 956  * @bss: Scan results for the selected BSS, or %NULL if not available
 957  * @ssid: Configuration data for the selected network
 958  *
 959  * This function is used to request %wpa_supplicant to associate with a BSS.
 960  */
 961 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
 962                               struct wpa_scan_res *bss, struct wpa_ssid *ssid)
 963 {
 964         u8 wpa_ie[80];
 965         size_t wpa_ie_len;
 966         int use_crypt, ret, i, bssid_changed;
 967         int algs = AUTH_ALG_OPEN_SYSTEM;
 968         wpa_cipher cipher_pairwise, cipher_group;
 969         struct wpa_driver_associate_params params;
 970         int wep_keys_set = 0;
 971         struct wpa_driver_capa capa;
 972         int assoc_failed = 0;
 973         struct wpa_ssid *old_ssid;
 974
 975         if (ssid->mode == 2) {
 976 #ifdef CONFIG_AP
 977                 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
 978                         wpa_printf(MSG_INFO, "Driver does not support AP "
 979                                    "mode");
 980                         return;
 981                 }
 982                 wpa_supplicant_create_ap(wpa_s, ssid);
 983 #else /* CONFIG_AP */
 984                 wpa_printf(MSG_ERROR, "AP mode support not included in the "
 985                            "build");
 986 #endif /* CONFIG_AP */
 987                 return;
 988         }
 989
 990         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) {
 991                 sme_authenticate(wpa_s, bss, ssid);
 992                 return;
 993         }
 994
 995         wpa_s->reassociate = 0;
 996         if (bss) {
 997 #ifdef CONFIG_IEEE80211R
 998                 const u8 *md = NULL;
 999 #endif /* CONFIG_IEEE80211R */
1000                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1001                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1002                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1003                         ie ? wpa_ssid_txt(ie + 2, ie[1]) : "", bss->freq);
1004                 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1005                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1006                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1007                 if (bssid_changed)
1008                         wpas_notify_bssid_changed(wpa_s);
1009 #ifdef CONFIG_IEEE80211R
1010                 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1011                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1012                         md = ie + 2;
1013                 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
1014                 if (md) {
1015                         /* Prepare for the next transition */
1016                         wpa_ft_prepare_auth_request(wpa_s->wpa);
1017                 }
1018 #endif /* CONFIG_IEEE80211R */
1019 #ifdef CONFIG_WPS
1020         } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1021                    wpa_s->conf->ap_scan == 2 &&
1022                    (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1023                 /* Use ap_scan==1 style network selection to find the network
1024                  */
1025                 wpa_s->scan_req = 2;
1026                 wpa_s->reassociate = 1;
1027                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1028                 return;
1029 #endif /* CONFIG_WPS */
1030         } else {
1031                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1032                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1033                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1034         }
1035         wpa_supplicant_cancel_scan(wpa_s);
1036
1037         /* Starting new association, so clear the possibly used WPA IE from the
1038          * previous association. */
1039         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1040
1041 #ifdef IEEE8021X_EAPOL
1042         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1043                 if (ssid->leap) {
1044                         if (ssid->non_leap == 0)
1045                                 algs = AUTH_ALG_LEAP;
1046                         else
1047                                 algs |= AUTH_ALG_LEAP;
1048                 }
1049         }
1050 #endif /* IEEE8021X_EAPOL */
1051         wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1052         if (ssid->auth_alg) {
1053                 algs = 0;
1054                 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
1055                         algs |= AUTH_ALG_OPEN_SYSTEM;
1056                 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
1057                         algs |= AUTH_ALG_SHARED_KEY;
1058                 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
1059                         algs |= AUTH_ALG_LEAP;
1060                 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
1061                            algs);
1062         }
1063
1064         if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1065                     wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
1066             (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
1067                                WPA_KEY_MGMT_FT_IEEE8021X |
1068                                WPA_KEY_MGMT_FT_PSK |
1069                                WPA_KEY_MGMT_IEEE8021X_SHA256 |
1070                                WPA_KEY_MGMT_PSK_SHA256))) {
1071                 int try_opportunistic;
1072                 try_opportunistic = ssid->proactive_key_caching &&
1073                         (ssid->proto & WPA_PROTO_RSN);
1074                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1075                                             wpa_s->current_ssid,
1076                                             try_opportunistic) == 0)
1077                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1078                 wpa_ie_len = sizeof(wpa_ie);
1079                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1080                                               wpa_ie, &wpa_ie_len)) {
1081                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1082                                    "management and encryption suites");
1083                         return;
1084                 }
1085         } else if (ssid->key_mgmt &
1086                    (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
1087                     WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
1088                     WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
1089                     WPA_KEY_MGMT_IEEE8021X_SHA256)) {
1090                 wpa_ie_len = sizeof(wpa_ie);
1091                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1092                                               wpa_ie, &wpa_ie_len)) {
1093                         wpa_printf(MSG_WARNING, "WPA: Failed to set WPA key "
1094                                    "management and encryption suites (no scan "
1095                                    "results)");
1096                         return;
1097                 }
1098 #ifdef CONFIG_WPS
1099         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1100                 struct wpabuf *wps_ie;
1101                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1102                 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1103                         wpa_ie_len = wpabuf_len(wps_ie);
1104                         os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1105                 } else
1106                         wpa_ie_len = 0;
1107                 wpabuf_free(wps_ie);
1108                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1109 #endif /* CONFIG_WPS */
1110         } else {
1111                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1112                 wpa_ie_len = 0;
1113         }
1114
1115         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1116         use_crypt = 1;
1117         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1118         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1119         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1120             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1121                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1122                         use_crypt = 0;
1123                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1124                         use_crypt = 1;
1125                         wep_keys_set = 1;
1126                 }
1127         }
1128         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1129                 use_crypt = 0;
1130
1131 #ifdef IEEE8021X_EAPOL
1132         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1133                 if ((ssid->eapol_flags &
1134                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1135                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1136                     !wep_keys_set) {
1137                         use_crypt = 0;
1138                 } else {
1139                         /* Assume that dynamic WEP-104 keys will be used and
1140                          * set cipher suites in order for drivers to expect
1141                          * encryption. */
1142                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1143                 }
1144         }
1145 #endif /* IEEE8021X_EAPOL */
1146
1147         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1148                 /* Set the key before (and later after) association */
1149                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1150         }
1151
1152         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1153         os_memset(&params, 0, sizeof(params));
1154         if (bss) {
1155                 const u8 *ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
1156                 params.bssid = bss->bssid;
1157                 params.ssid = ie ? ie + 2 : (u8 *) "";
1158                 params.ssid_len = ie ? ie[1] : 0;
1159                 params.freq = bss->freq;
1160         } else {
1161                 params.ssid = ssid->ssid;
1162                 params.ssid_len = ssid->ssid_len;
1163         }
1164         if (ssid->mode == 1 && ssid->frequency > 0 && params.freq == 0)
1165                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1166         params.wpa_ie = wpa_ie;
1167         params.wpa_ie_len = wpa_ie_len;
1168         params.pairwise_suite = cipher_pairwise;
1169         params.group_suite = cipher_group;
1170         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1171         params.auth_alg = algs;
1172         params.mode = ssid->mode;
1173         for (i = 0; i < NUM_WEP_KEYS; i++) {
1174                 if (ssid->wep_key_len[i])
1175                         params.wep_key[i] = ssid->wep_key[i];
1176                 params.wep_key_len[i] = ssid->wep_key_len[i];
1177         }
1178         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1179
1180         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1181             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1182              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1183                 params.passphrase = ssid->passphrase;
1184                 if (ssid->psk_set)
1185                         params.psk = ssid->psk;
1186         }
1187
1188         params.drop_unencrypted = use_crypt;
1189
1190 #ifdef CONFIG_IEEE80211W
1191         switch (ssid->ieee80211w) {
1192         case NO_IEEE80211W:
1193                 params.mgmt_frame_protection = NO_MGMT_FRAME_PROTECTION;
1194                 break;
1195         case IEEE80211W_OPTIONAL:
1196                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_OPTIONAL;
1197                 break;
1198         case IEEE80211W_REQUIRED:
1199                 params.mgmt_frame_protection = MGMT_FRAME_PROTECTION_REQUIRED;
1200                 break;
1201         }
1202         if (ssid->ieee80211w != NO_IEEE80211W && bss) {
1203                 const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
1204                 struct wpa_ie_data ie;
1205                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1206                     ie.capabilities &
1207                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1208                         wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
1209                                    "require MFP");
1210                         params.mgmt_frame_protection =
1211                                 MGMT_FRAME_PROTECTION_REQUIRED;
1212                 }
1213         }
1214 #endif /* CONFIG_IEEE80211W */
1215
1216         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1217                 ret = ieee80211_sta_associate(wpa_s, &params);
1218         else
1219                 ret = wpa_drv_associate(wpa_s, &params);
1220         if (ret < 0) {
1221                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1222                         "failed");
1223                 /* try to continue anyway; new association will be tried again
1224                  * after timeout */
1225                 assoc_failed = 1;
1226         }
1227
1228         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1229                 /* Set the key after the association just in case association
1230                  * cleared the previously configured key. */
1231                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1232                 /* No need to timeout authentication since there is no key
1233                  * management. */
1234                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1235                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1236 #ifdef CONFIG_IBSS_RSN
1237         } else if (ssid->mode == IEEE80211_MODE_IBSS &&
1238                    wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1239                    wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1240                 ibss_rsn_set_psk(wpa_s->ibss_rsn, ssid->psk);
1241                 /*
1242                  * RSN IBSS authentication is per-STA and we can disable the
1243                  * per-BSSID authentication.
1244                  */
1245                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1246                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1247 #endif /* CONFIG_IBSS_RSN */
1248         } else {
1249                 /* Timeout for IEEE 802.11 authentication and association */
1250                 int timeout = 60;
1251
1252                 if (assoc_failed) {
1253                         /* give IBSS a bit more time */
1254                         timeout = ssid->mode ? 10 : 5;
1255                 } else if (wpa_s->conf->ap_scan == 1) {
1256                         /* give IBSS a bit more time */
1257                         timeout = ssid->mode ? 20 : 10;
1258                 }
1259                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1260         }
1261
1262         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1263             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1264                 /* Set static WEP keys again */
1265                 wpa_set_wep_keys(wpa_s, ssid);
1266         }
1267
1268         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1269                 /*
1270                  * Do not allow EAP session resumption between different
1271                  * network configurations.
1272                  */
1273                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1274         }
1275         old_ssid = wpa_s->current_ssid;
1276         wpa_s->current_ssid = ssid;
1277         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1278         wpa_supplicant_initiate_eapol(wpa_s);
1279         if (old_ssid != wpa_s->current_ssid)
1280                 wpas_notify_network_changed(wpa_s);
1281 }
1282
1283
1284 /**
1285  * wpa_supplicant_disassociate - Disassociate the current connection
1286  * @wpa_s: Pointer to wpa_supplicant data
1287  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1288  *
1289  * This function is used to request %wpa_supplicant to disassociate with the
1290  * current AP.
1291  */
1292 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1293                                  int reason_code)
1294 {
1295         struct wpa_ssid *old_ssid;
1296         u8 *addr = NULL;
1297
1298         if (!is_zero_ether_addr(wpa_s->bssid)) {
1299                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1300                         ieee80211_sta_disassociate(wpa_s, reason_code);
1301                 else
1302                         wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1303                 addr = wpa_s->bssid;
1304         }
1305         wpa_clear_keys(wpa_s, addr);
1306         wpa_supplicant_mark_disassoc(wpa_s);
1307         old_ssid = wpa_s->current_ssid;
1308         wpa_s->current_ssid = NULL;
1309         wpa_sm_set_config(wpa_s->wpa, NULL);
1310         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1311         if (old_ssid != wpa_s->current_ssid)
1312                 wpas_notify_network_changed(wpa_s);
1313 }
1314
1315
1316 /**
1317  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1318  * @wpa_s: Pointer to wpa_supplicant data
1319  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1320  *
1321  * This function is used to request %wpa_supplicant to deauthenticate from the
1322  * current AP.
1323  */
1324 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1325                                    int reason_code)
1326 {
1327         struct wpa_ssid *old_ssid;
1328         u8 *addr = NULL;
1329
1330         if (!is_zero_ether_addr(wpa_s->bssid)) {
1331                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1332                         ieee80211_sta_deauthenticate(wpa_s, reason_code);
1333                 else
1334                         wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
1335                                                reason_code);
1336                 addr = wpa_s->bssid;
1337         }
1338         wpa_clear_keys(wpa_s, addr);
1339         wpa_supplicant_mark_disassoc(wpa_s);
1340         old_ssid = wpa_s->current_ssid;
1341         wpa_s->current_ssid = NULL;
1342         wpa_sm_set_config(wpa_s->wpa, NULL);
1343         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1344         if (old_ssid != wpa_s->current_ssid)
1345                 wpas_notify_network_changed(wpa_s);
1346 }
1347
1348
1349 /**
1350  * wpa_supplicant_enable_network - Mark a configured network as enabled
1351  * @wpa_s: wpa_supplicant structure for a network interface
1352  * @ssid: wpa_ssid structure for a configured network or %NULL
1353  *
1354  * Enables the specified network or all networks if no network specified.
1355  */
1356 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1357                                    struct wpa_ssid *ssid)
1358 {
1359         struct wpa_ssid *other_ssid;
1360         int was_disabled;
1361
1362         if (ssid == NULL) {
1363                 other_ssid = wpa_s->conf->ssid;
1364                 while (other_ssid) {
1365                         if (other_ssid == wpa_s->current_ssid &&
1366                             other_ssid->disabled)
1367                                 wpa_s->reassociate = 1;
1368
1369                         was_disabled = other_ssid->disabled;
1370
1371                         other_ssid->disabled = 0;
1372
1373                         if (was_disabled != other_ssid->disabled)
1374                                 wpas_notify_network_enabled_changed(
1375                                         wpa_s, other_ssid);
1376
1377                         other_ssid = other_ssid->next;
1378                 }
1379                 if (wpa_s->reassociate)
1380                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1381         } else if (wpa_s->current_ssid == NULL && ssid->disabled) {
1382                 /*
1383                  * Try to reassociate since there is no current configuration
1384                  * and a new network was made available.
1385                  */
1386                 wpa_s->reassociate = 1;
1387                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1388
1389                 was_disabled = ssid->disabled;
1390
1391                 ssid->disabled = 0;
1392
1393                 if (was_disabled != ssid->disabled)
1394                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1395         }
1396 }
1397
1398
1399 /**
1400  * wpa_supplicant_disable_network - Mark a configured network as disabled
1401  * @wpa_s: wpa_supplicant structure for a network interface
1402  * @ssid: wpa_ssid structure for a configured network or %NULL
1403  *
1404  * Disables the specified network or all networks if no network specified.
1405  */
1406 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1407                                     struct wpa_ssid *ssid)
1408 {
1409         struct wpa_ssid *other_ssid;
1410         int was_disabled;
1411
1412         if (ssid == NULL) {
1413                 other_ssid = wpa_s->conf->ssid;
1414                 while (other_ssid) {
1415                         was_disabled = other_ssid->disabled;
1416
1417                         other_ssid->disabled = 1;
1418
1419                         if (was_disabled != other_ssid->disabled)
1420                                 wpas_notify_network_enabled_changed(
1421                                         wpa_s, other_ssid);
1422
1423                         other_ssid = other_ssid->next;
1424                 }
1425                 if (wpa_s->current_ssid)
1426                         wpa_supplicant_disassociate(
1427                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1428         } else {
1429                 if (ssid == wpa_s->current_ssid)
1430                         wpa_supplicant_disassociate(
1431                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1432
1433                 was_disabled = ssid->disabled;
1434
1435                 ssid->disabled = 1;
1436
1437                 if (was_disabled != ssid->disabled)
1438                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1439         }
1440 }
1441
1442
1443 /**
1444  * wpa_supplicant_select_network - Attempt association with a network
1445  * @wpa_s: wpa_supplicant structure for a network interface
1446  * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1447  */
1448 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1449                                    struct wpa_ssid *ssid)
1450 {
1451
1452         struct wpa_ssid *other_ssid;
1453
1454         if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid)
1455                 wpa_supplicant_disassociate(
1456                         wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1457
1458         /*
1459          * Mark all other networks disabled or mark all networks enabled if no
1460          * network specified.
1461          */
1462         other_ssid = wpa_s->conf->ssid;
1463         while (other_ssid) {
1464                 int was_disabled = other_ssid->disabled;
1465
1466                 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1467
1468                 if (was_disabled != other_ssid->disabled)
1469                         wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1470
1471                 other_ssid = other_ssid->next;
1472         }
1473         wpa_s->disconnected = 0;
1474         wpa_s->reassociate = 1;
1475         wpa_supplicant_req_scan(wpa_s, 0, 0);
1476
1477         if (ssid)
1478                 wpas_notify_network_selected(wpa_s, ssid);
1479 }
1480
1481
1482 /**
1483  * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1484  * @wpa_s: wpa_supplicant structure for a network interface
1485  * @ap_scan: AP scan mode
1486  * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1487  *
1488  */
1489 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1490 {
1491
1492         int old_ap_scan;
1493
1494         if (ap_scan < 0 || ap_scan > 2)
1495                 return -1;
1496
1497         old_ap_scan = wpa_s->conf->ap_scan;
1498         wpa_s->conf->ap_scan = ap_scan;
1499
1500         if (old_ap_scan != wpa_s->conf->ap_scan)
1501                 wpas_notify_ap_scan_changed(wpa_s);
1502
1503         return 0;
1504 }
1505
1506
1507 /**
1508  * wpa_supplicant_set_debug_params - Set global debug params
1509  * @global: wpa_global structure
1510  * @debug_level: debug level
1511  * @debug_timestamp: determines if show timestamp in debug data
1512  * @debug_show_keys: determines if show keys in debug data
1513  * Returns: 0 if succeed or -1 if debug_level has wrong value
1514  */
1515 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1516                                     int debug_timestamp, int debug_show_keys)
1517 {
1518
1519         int old_level, old_timestamp, old_show_keys;
1520
1521         /* check for allowed debuglevels */
1522         if (debug_level != MSG_MSGDUMP &&
1523             debug_level != MSG_DEBUG &&
1524             debug_level != MSG_INFO &&
1525             debug_level != MSG_WARNING &&
1526             debug_level != MSG_ERROR)
1527                 return -1;
1528
1529         old_level = wpa_debug_level;
1530         old_timestamp = wpa_debug_timestamp;
1531         old_show_keys = wpa_debug_show_keys;
1532
1533         wpa_debug_level = debug_level;
1534         wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1535         wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1536
1537         if (wpa_debug_level != old_level ||
1538             wpa_debug_timestamp != old_timestamp ||
1539             wpa_debug_show_keys != old_show_keys)
1540                 wpas_notify_debug_params_changed(global);
1541
1542         return 0;
1543 }
1544
1545
1546 static void notify_bss_changes(struct wpa_supplicant *wpa_s,
1547                                u8 (*prev_bssids)[ETH_ALEN], int prev_num,
1548                                struct wpa_scan_results *new)
1549 {
1550         int new_num, i, j;
1551
1552         new_num = new != NULL ? new->num : 0;
1553         if (prev_bssids == NULL)
1554                 prev_num = 0;
1555
1556         for (i = 0; i < prev_num; i++) {
1557                 for (j = 0; j < new_num; j++) {
1558                         if (!os_memcmp(prev_bssids[i], new->res[j]->bssid,
1559                                        ETH_ALEN))
1560                                 break;
1561                 }
1562                 if (j == new_num)
1563                         wpas_notify_bss_removed(wpa_s, prev_bssids[i]);
1564         }
1565         for (i = 0; i < new_num; i++) {
1566                 for (j = 0; j < prev_num; j++) {
1567                         if (!os_memcmp(new->res[i]->bssid, prev_bssids[j],
1568                                        ETH_ALEN))
1569                                 break;
1570                 }
1571                 if (j == prev_num)
1572                         wpas_notify_bss_added(wpa_s, new->res[i]->bssid);
1573         }
1574 }
1575
1576
1577 static struct wpa_scan_results * wpa_supplicant_get_scan_results_old(
1578         struct wpa_supplicant *wpa_s)
1579 {
1580 #define SCAN_AP_LIMIT 128
1581         struct wpa_scan_result *results;
1582         int num, i;
1583         struct wpa_scan_results *res;
1584
1585         results = os_malloc(SCAN_AP_LIMIT * sizeof(struct wpa_scan_result));
1586         if (results == NULL) {
1587                 wpa_printf(MSG_WARNING, "Failed to allocate memory for scan "
1588                            "results");
1589                 return NULL;
1590         }
1591
1592         num = wpa_drv_get_scan_results(wpa_s, results, SCAN_AP_LIMIT);
1593         wpa_printf(MSG_DEBUG, "Scan results: %d", num);
1594         if (num < 0) {
1595                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1596                 os_free(results);
1597                 return NULL;
1598         }
1599         if (num > SCAN_AP_LIMIT) {
1600                 wpa_printf(MSG_INFO, "Not enough room for all APs (%d < %d)",
1601                            num, SCAN_AP_LIMIT);
1602                 num = SCAN_AP_LIMIT;
1603         }
1604
1605         /* Convert old scan result data structure to the new one */
1606         res = os_zalloc(sizeof(*res));
1607         if (res == NULL) {
1608                 os_free(results);
1609                 return NULL;
1610         }
1611         res->res = os_zalloc(num * sizeof(struct wpa_scan_res *));
1612         if (res->res == NULL) {
1613                 os_free(results);
1614                 os_free(res);
1615                 return NULL;
1616         }
1617
1618         for (i = 0; i < num; i++) {
1619                 struct wpa_scan_result *bss = &results[i];
1620                 struct wpa_scan_res *r;
1621                 size_t ie_len;
1622                 u8 *pos;
1623
1624                 ie_len = 2 + bss->ssid_len + bss->rsn_ie_len + bss->wpa_ie_len;
1625                 if (bss->maxrate)
1626                         ie_len += 3;
1627                 if (bss->mdie_present)
1628                         ie_len += 5;
1629
1630                 r = os_zalloc(sizeof(*r) + ie_len);
1631                 if (r == NULL)
1632                         break;
1633
1634                 os_memcpy(r->bssid, bss->bssid, ETH_ALEN);
1635                 r->freq = bss->freq;
1636                 r->caps = bss->caps;
1637                 r->qual = bss->qual;
1638                 r->noise = bss->noise;
1639                 r->level = bss->level;
1640                 r->tsf = bss->tsf;
1641                 r->ie_len = ie_len;
1642
1643                 pos = (u8 *) (r + 1);
1644
1645                 /* SSID IE */
1646                 *pos++ = WLAN_EID_SSID;
1647                 *pos++ = bss->ssid_len;
1648                 os_memcpy(pos, bss->ssid, bss->ssid_len);
1649                 pos += bss->ssid_len;
1650
1651                 if (bss->maxrate) {
1652                         /* Fake Supported Rate IE to include max rate */
1653                         *pos++ = WLAN_EID_SUPP_RATES;
1654                         *pos++ = 1;
1655                         *pos++ = bss->maxrate;
1656                 }
1657
1658                 if (bss->rsn_ie_len) {
1659                         os_memcpy(pos, bss->rsn_ie, bss->rsn_ie_len);
1660                         pos += bss->rsn_ie_len;
1661                 }
1662
1663                 if (bss->mdie_present) {
1664                         os_memcpy(pos, bss->mdie, 5);
1665                         pos += 5;
1666                 }
1667
1668                 if (bss->wpa_ie_len) {
1669                         os_memcpy(pos, bss->wpa_ie, bss->wpa_ie_len);
1670                         pos += bss->wpa_ie_len;
1671                 }
1672
1673                 res->res[res->num++] = r;
1674         }
1675
1676         os_free(results);
1677
1678         return res;
1679 }
1680
1681
1682 /**
1683  * wpa_supplicant_get_scan_results - Get scan results
1684  * @wpa_s: Pointer to wpa_supplicant data
1685  * Returns: 0 on success, -1 on failure
1686  *
1687  * This function is request the current scan results from the driver and stores
1688  * a local copy of the results in wpa_s->scan_res.
1689  */
1690 int wpa_supplicant_get_scan_results(struct wpa_supplicant *wpa_s)
1691 {
1692         int ret, i, prev_scan_res_num;
1693         u8 (*prev_scan_bssids)[ETH_ALEN];
1694
1695         prev_scan_res_num = wpa_s->scan_res ? wpa_s->scan_res->num : 0;
1696         prev_scan_bssids = os_malloc(prev_scan_res_num * ETH_ALEN);
1697
1698         if (prev_scan_bssids) {
1699                 for (i = 0; i < prev_scan_res_num; i++) {
1700                         os_memcpy(prev_scan_bssids[i],
1701                                   wpa_s->scan_res->res[i]->bssid, ETH_ALEN);
1702                 }
1703         } else {
1704                 wpa_printf(MSG_WARNING, "Not enough memory for old scan "
1705                            "results list");
1706                 prev_scan_res_num = 0;
1707         }
1708
1709         wpa_scan_results_free(wpa_s->scan_res);
1710         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1711                 wpa_s->scan_res = ieee80211_sta_get_scan_results(wpa_s);
1712         else if (wpa_s->driver->get_scan_results2 == NULL)
1713                 wpa_s->scan_res = wpa_supplicant_get_scan_results_old(wpa_s);
1714         else
1715                 wpa_s->scan_res = wpa_drv_get_scan_results2(wpa_s);
1716         if (wpa_s->scan_res == NULL) {
1717                 wpa_printf(MSG_DEBUG, "Failed to get scan results");
1718                 ret = -1;
1719         } else {
1720                 ret = 0;
1721                 wpa_scan_sort_results(wpa_s->scan_res);
1722         }
1723
1724         notify_bss_changes(wpa_s, prev_scan_bssids, prev_scan_res_num,
1725                            wpa_s->scan_res);
1726         os_free(prev_scan_bssids);
1727
1728         return ret;
1729 }
1730
1731
1732 /**
1733  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1734  * @wpa_s: Pointer to wpa_supplicant data
1735  * Returns: A pointer to the current network structure or %NULL on failure
1736  */
1737 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1738 {
1739         struct wpa_ssid *entry;
1740         u8 ssid[MAX_SSID_LEN];
1741         int res;
1742         size_t ssid_len;
1743         u8 bssid[ETH_ALEN];
1744         int wired;
1745
1746         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
1747                 if (ieee80211_sta_get_ssid(wpa_s, ssid, &ssid_len)) {
1748                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1749                                    "MLME.");
1750                         return NULL;
1751                 }
1752         } else {
1753                 res = wpa_drv_get_ssid(wpa_s, ssid);
1754                 if (res < 0) {
1755                         wpa_printf(MSG_WARNING, "Could not read SSID from "
1756                                    "driver.");
1757                         return NULL;
1758                 }
1759                 ssid_len = res;
1760         }
1761
1762         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1763                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1764         else if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1765                 wpa_printf(MSG_WARNING, "Could not read BSSID from driver.");
1766                 return NULL;
1767         }
1768
1769         wired = wpa_s->conf->ap_scan == 0 &&
1770                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1771
1772         entry = wpa_s->conf->ssid;
1773         while (entry) {
1774                 if (!entry->disabled &&
1775                     ((ssid_len == entry->ssid_len &&
1776                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1777                     (!entry->bssid_set ||
1778                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1779                         return entry;
1780 #ifdef CONFIG_WPS
1781                 if (!entry->disabled &&
1782                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1783                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1784                     (!entry->bssid_set ||
1785                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1786                         return entry;
1787 #endif /* CONFIG_WPS */
1788                 entry = entry->next;
1789         }
1790
1791         return NULL;
1792 }
1793
1794
1795 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1796                                      const char *name)
1797 {
1798         int i;
1799         size_t len;
1800         const char *pos;
1801
1802         if (wpa_s == NULL)
1803                 return -1;
1804
1805         if (wpa_drivers[0] == NULL) {
1806                 wpa_printf(MSG_ERROR, "No driver interfaces build into "
1807                            "wpa_supplicant.");
1808                 return -1;
1809         }
1810
1811         if (name == NULL) {
1812                 /* default to first driver in the list */
1813                 wpa_s->driver = wpa_drivers[0];
1814                 return 0;
1815         }
1816
1817         pos = os_strchr(name, ',');
1818         if (pos)
1819                 len = pos - name;
1820         else
1821                 len = os_strlen(name);
1822         for (i = 0; wpa_drivers[i]; i++) {
1823                 if (os_strlen(wpa_drivers[i]->name) == len &&
1824                     os_strncmp(name, wpa_drivers[i]->name, len) ==
1825                     0) {
1826                         wpa_s->driver = wpa_drivers[i];
1827                         return 0;
1828                 }
1829         }
1830
1831         wpa_printf(MSG_ERROR, "Unsupported driver '%s'.", name);
1832         return -1;
1833 }
1834
1835
1836 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1837                              const u8 *buf, size_t len)
1838 {
1839         struct wpa_supplicant *wpa_s = ctx;
1840
1841         wpa_printf(MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1842         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1843
1844         if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1845                 /*
1846                  * There is possible race condition between receiving the
1847                  * association event and the EAPOL frame since they are coming
1848                  * through different paths from the driver. In order to avoid
1849                  * issues in trying to process the EAPOL frame before receiving
1850                  * association information, lets queue it for processing until
1851                  * the association event is received.
1852                  */
1853                 wpa_printf(MSG_DEBUG, "Not associated - Delay processing of "
1854                            "received EAPOL frame");
1855                 wpabuf_free(wpa_s->pending_eapol_rx);
1856                 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
1857                 if (wpa_s->pending_eapol_rx) {
1858                         os_get_time(&wpa_s->pending_eapol_rx_time);
1859                         os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
1860                                   ETH_ALEN);
1861                 }
1862                 return;
1863         }
1864
1865 #ifdef CONFIG_AP
1866         if (wpa_s->ap_iface) {
1867                 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
1868                 return;
1869         }
1870 #endif /* CONFIG_AP */
1871
1872         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
1873                 wpa_printf(MSG_DEBUG, "Ignored received EAPOL frame since "
1874                            "no key management is configured");
1875                 return;
1876         }
1877
1878         if (wpa_s->eapol_received == 0 &&
1879             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
1880              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
1881              wpa_s->wpa_state != WPA_COMPLETED)) {
1882                 /* Timeout for completing IEEE 802.1X and WPA authentication */
1883                 wpa_supplicant_req_auth_timeout(
1884                         wpa_s,
1885                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
1886                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
1887                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
1888                         70 : 10, 0);
1889         }
1890         wpa_s->eapol_received++;
1891
1892         if (wpa_s->countermeasures) {
1893                 wpa_printf(MSG_INFO, "WPA: Countermeasures - dropped EAPOL "
1894                            "packet");
1895                 return;
1896         }
1897
1898 #ifdef CONFIG_IBSS_RSN
1899         if (wpa_s->current_ssid &&
1900             wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS) {
1901                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
1902                 return;
1903         }
1904 #endif /* CONFIG_IBSS_RSN */
1905
1906         /* Source address of the incoming EAPOL frame could be compared to the
1907          * current BSSID. However, it is possible that a centralized
1908          * Authenticator could be using another MAC address than the BSSID of
1909          * an AP, so just allow any address to be used for now. The replies are
1910          * still sent to the current BSSID (if available), though. */
1911
1912         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
1913         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
1914             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
1915                 return;
1916         wpa_drv_poll(wpa_s);
1917         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
1918                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
1919         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1920                 /*
1921                  * Set portValid = TRUE here since we are going to skip 4-way
1922                  * handshake processing which would normally set portValid. We
1923                  * need this to allow the EAPOL state machines to be completed
1924                  * without going through EAPOL-Key handshake.
1925                  */
1926                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1927         }
1928 }
1929
1930
1931 void wpa_supplicant_sta_rx(void *ctx, const u8 *buf, size_t len,
1932                            struct ieee80211_rx_status *rx_status)
1933 {
1934         struct wpa_supplicant *wpa_s = ctx;
1935         ieee80211_sta_rx(wpa_s, buf, len, rx_status);
1936 }
1937
1938
1939 /**
1940  * wpa_supplicant_driver_init - Initialize driver interface parameters
1941  * @wpa_s: Pointer to wpa_supplicant data
1942  * Returns: 0 on success, -1 on failure
1943  *
1944  * This function is called to initialize driver interface parameters.
1945  * wpa_drv_init() must have been called before this function to initialize the
1946  * driver interface.
1947  */
1948 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
1949 {
1950         static int interface_count = 0;
1951
1952         if (wpa_s->driver->send_eapol) {
1953                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
1954                 if (addr)
1955                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
1956         } else {
1957                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
1958                                            wpa_drv_get_mac_addr(wpa_s),
1959                                            ETH_P_EAPOL,
1960                                            wpa_supplicant_rx_eapol, wpa_s, 0);
1961                 if (wpa_s->l2 == NULL)
1962                         return -1;
1963         }
1964
1965         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
1966                 wpa_printf(MSG_ERROR, "Failed to get own L2 address");
1967                 return -1;
1968         }
1969
1970         wpa_printf(MSG_DEBUG, "Own MAC address: " MACSTR,
1971                    MAC2STR(wpa_s->own_addr));
1972
1973         if (wpa_s->bridge_ifname[0]) {
1974                 wpa_printf(MSG_DEBUG, "Receiving packets from bridge interface"
1975                            " '%s'", wpa_s->bridge_ifname);
1976                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
1977                                               wpa_s->own_addr,
1978                                               ETH_P_EAPOL,
1979                                               wpa_supplicant_rx_eapol, wpa_s,
1980                                               0);
1981                 if (wpa_s->l2_br == NULL) {
1982                         wpa_printf(MSG_ERROR, "Failed to open l2_packet "
1983                                    "connection for the bridge interface '%s'",
1984                                    wpa_s->bridge_ifname);
1985                         return -1;
1986                 }
1987         }
1988
1989         wpa_clear_keys(wpa_s, NULL);
1990
1991         /* Make sure that TKIP countermeasures are not left enabled (could
1992          * happen if wpa_supplicant is killed during countermeasures. */
1993         wpa_drv_set_countermeasures(wpa_s, 0);
1994
1995         wpa_printf(MSG_DEBUG, "RSN: flushing PMKID list in the driver");
1996         wpa_drv_flush_pmkid(wpa_s);
1997
1998         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
1999         wpa_supplicant_req_scan(wpa_s, interface_count, 100000);
2000         interface_count++;
2001
2002         return 0;
2003 }
2004
2005
2006 static int wpa_supplicant_daemon(const char *pid_file)
2007 {
2008         wpa_printf(MSG_DEBUG, "Daemonize..");
2009         return os_daemonize(pid_file);
2010 }
2011
2012
2013 static struct wpa_supplicant * wpa_supplicant_alloc(void)
2014 {
2015         struct wpa_supplicant *wpa_s;
2016
2017         wpa_s = os_zalloc(sizeof(*wpa_s));
2018         if (wpa_s == NULL)
2019                 return NULL;
2020         wpa_s->scan_req = 1;
2021
2022         return wpa_s;
2023 }
2024
2025
2026 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
2027                                      struct wpa_interface *iface)
2028 {
2029         const char *ifname, *driver;
2030         struct wpa_driver_capa capa;
2031
2032         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
2033                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
2034                    iface->confname ? iface->confname : "N/A",
2035                    iface->driver ? iface->driver : "default",
2036                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
2037                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
2038
2039         if (iface->confname) {
2040 #ifdef CONFIG_BACKEND_FILE
2041                 wpa_s->confname = os_rel2abs_path(iface->confname);
2042                 if (wpa_s->confname == NULL) {
2043                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
2044                                    "for configuration file '%s'.",
2045                                    iface->confname);
2046                         return -1;
2047                 }
2048                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
2049                            iface->confname, wpa_s->confname);
2050 #else /* CONFIG_BACKEND_FILE */
2051                 wpa_s->confname = os_strdup(iface->confname);
2052 #endif /* CONFIG_BACKEND_FILE */
2053                 wpa_s->conf = wpa_config_read(wpa_s->confname);
2054                 if (wpa_s->conf == NULL) {
2055                         wpa_printf(MSG_ERROR, "Failed to read or parse "
2056                                    "configuration '%s'.", wpa_s->confname);
2057                         return -1;
2058                 }
2059
2060                 /*
2061                  * Override ctrl_interface and driver_param if set on command
2062                  * line.
2063                  */
2064                 if (iface->ctrl_interface) {
2065                         os_free(wpa_s->conf->ctrl_interface);
2066                         wpa_s->conf->ctrl_interface =
2067                                 os_strdup(iface->ctrl_interface);
2068                 }
2069
2070                 if (iface->driver_param) {
2071                         os_free(wpa_s->conf->driver_param);
2072                         wpa_s->conf->driver_param =
2073                                 os_strdup(iface->driver_param);
2074                 }
2075         } else
2076                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
2077                                                      iface->driver_param);
2078
2079         if (wpa_s->conf == NULL) {
2080                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
2081                 return -1;
2082         }
2083
2084         if (iface->ifname == NULL) {
2085                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
2086                 return -1;
2087         }
2088         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
2089                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
2090                            iface->ifname);
2091                 return -1;
2092         }
2093         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
2094
2095         if (iface->bridge_ifname) {
2096                 if (os_strlen(iface->bridge_ifname) >=
2097                     sizeof(wpa_s->bridge_ifname)) {
2098                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
2099                                    "name '%s'.", iface->bridge_ifname);
2100                         return -1;
2101                 }
2102                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
2103                            sizeof(wpa_s->bridge_ifname));
2104         }
2105
2106         /* RSNA Supplicant Key Management - INITIALIZE */
2107         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2108         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2109
2110         /* Initialize driver interface and register driver event handler before
2111          * L2 receive handler so that association events are processed before
2112          * EAPOL-Key packets if both become available for the same select()
2113          * call. */
2114         driver = iface->driver;
2115 next_driver:
2116         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2117                 return -1;
2118
2119         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2120         if (wpa_s->drv_priv == NULL) {
2121                 const char *pos;
2122                 pos = os_strchr(driver, ',');
2123                 if (pos) {
2124                         wpa_printf(MSG_DEBUG, "Failed to initialize driver "
2125                                    "interface - try next driver wrapper");
2126                         driver = pos + 1;
2127                         goto next_driver;
2128                 }
2129                 wpa_printf(MSG_ERROR, "Failed to initialize driver interface");
2130                 return -1;
2131         }
2132         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2133                 wpa_printf(MSG_ERROR, "Driver interface rejected "
2134                            "driver_param '%s'", wpa_s->conf->driver_param);
2135                 return -1;
2136         }
2137
2138         ifname = wpa_drv_get_ifname(wpa_s);
2139         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2140                 wpa_printf(MSG_DEBUG, "Driver interface replaced interface "
2141                            "name with '%s'", ifname);
2142                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2143         }
2144
2145         if (wpa_supplicant_init_wpa(wpa_s) < 0)
2146                 return -1;
2147
2148         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2149                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2150                           NULL);
2151         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2152
2153         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2154             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2155                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2156                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2157                            "dot11RSNAConfigPMKLifetime");
2158                 return -1;
2159         }
2160
2161         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2162             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2163                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2164                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2165                         "dot11RSNAConfigPMKReauthThreshold");
2166                 return -1;
2167         }
2168
2169         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2170             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2171                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
2172                 wpa_printf(MSG_ERROR, "Invalid WPA parameter value for "
2173                            "dot11RSNAConfigSATimeout");
2174                 return -1;
2175         }
2176
2177         if (wpa_supplicant_driver_init(wpa_s) < 0)
2178                 return -1;
2179
2180         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2181             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2182                 wpa_printf(MSG_DEBUG, "Failed to set country");
2183                 return -1;
2184         }
2185
2186         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2187
2188         if (wpas_wps_init(wpa_s))
2189                 return -1;
2190
2191         if (wpa_supplicant_init_eapol(wpa_s) < 0)
2192                 return -1;
2193         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2194
2195         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2196         if (wpa_s->ctrl_iface == NULL) {
2197                 wpa_printf(MSG_ERROR,
2198                            "Failed to initialize control interface '%s'.\n"
2199                            "You may have another wpa_supplicant process "
2200                            "already running or the file was\n"
2201                            "left by an unclean termination of wpa_supplicant "
2202                            "in which case you will need\n"
2203                            "to manually remove this file before starting "
2204                            "wpa_supplicant again.\n",
2205                            wpa_s->conf->ctrl_interface);
2206                 return -1;
2207         }
2208
2209         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2210                 wpa_s->drv_flags = capa.flags;
2211                 if (capa.flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) {
2212                         if (ieee80211_sta_init(wpa_s))
2213                                 return -1;
2214                 }
2215                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2216         }
2217
2218 #ifdef CONFIG_IBSS_RSN
2219         wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
2220         if (!wpa_s->ibss_rsn) {
2221                 wpa_printf(MSG_DEBUG, "Failed to init IBSS RSN");
2222                 return -1;
2223         }
2224 #endif /* CONFIG_IBSS_RSN */
2225
2226         return 0;
2227 }
2228
2229
2230 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s)
2231 {
2232         if (wpa_s->drv_priv) {
2233                 wpa_supplicant_deauthenticate(wpa_s,
2234                                               WLAN_REASON_DEAUTH_LEAVING);
2235
2236                 wpa_drv_set_countermeasures(wpa_s, 0);
2237                 wpa_clear_keys(wpa_s, NULL);
2238         }
2239
2240         wpas_notify_iface_removed(wpa_s);
2241
2242         wpa_supplicant_cleanup(wpa_s);
2243
2244         if (wpa_s->drv_priv)
2245                 wpa_drv_deinit(wpa_s);
2246 }
2247
2248
2249 /**
2250  * wpa_supplicant_add_iface - Add a new network interface
2251  * @global: Pointer to global data from wpa_supplicant_init()
2252  * @iface: Interface configuration options
2253  * Returns: Pointer to the created interface or %NULL on failure
2254  *
2255  * This function is used to add new network interfaces for %wpa_supplicant.
2256  * This can be called before wpa_supplicant_run() to add interfaces before the
2257  * main event loop has been started. In addition, new interfaces can be added
2258  * dynamically while %wpa_supplicant is already running. This could happen,
2259  * e.g., when a hotplug network adapter is inserted.
2260  */
2261 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2262                                                  struct wpa_interface *iface)
2263 {
2264         struct wpa_supplicant *wpa_s;
2265         struct wpa_interface t_iface;
2266
2267         if (global == NULL || iface == NULL)
2268                 return NULL;
2269
2270         wpa_s = wpa_supplicant_alloc();
2271         if (wpa_s == NULL)
2272                 return NULL;
2273
2274         t_iface = *iface;
2275         if (global->params.override_driver) {
2276                 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2277                            "('%s' -> '%s')",
2278                            iface->driver, global->params.override_driver);
2279                 t_iface.driver = global->params.override_driver;
2280         }
2281         if (global->params.override_ctrl_interface) {
2282                 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2283                            "ctrl_interface ('%s' -> '%s')",
2284                            iface->ctrl_interface,
2285                            global->params.override_ctrl_interface);
2286                 t_iface.ctrl_interface =
2287                         global->params.override_ctrl_interface;
2288         }
2289         if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2290                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2291                            iface->ifname);
2292                 wpa_supplicant_deinit_iface(wpa_s);
2293                 os_free(wpa_s);
2294                 return NULL;
2295         }
2296
2297         wpa_s->global = global;
2298
2299         /* Notify the control interfaces about new iface */
2300         if (wpas_notify_iface_added(wpa_s)) {
2301                 wpa_supplicant_deinit_iface(wpa_s);
2302                 os_free(wpa_s);
2303                 return NULL;
2304         }
2305
2306         wpa_s->next = global->ifaces;
2307         global->ifaces = wpa_s;
2308
2309         wpa_printf(MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2310
2311         return wpa_s;
2312 }
2313
2314
2315 /**
2316  * wpa_supplicant_remove_iface - Remove a network interface
2317  * @global: Pointer to global data from wpa_supplicant_init()
2318  * @wpa_s: Pointer to the network interface to be removed
2319  * Returns: 0 if interface was removed, -1 if interface was not found
2320  *
2321  * This function can be used to dynamically remove network interfaces from
2322  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2323  * addition, this function is used to remove all remaining interfaces when
2324  * %wpa_supplicant is terminated.
2325  */
2326 int wpa_supplicant_remove_iface(struct wpa_global *global,
2327                                 struct wpa_supplicant *wpa_s)
2328 {
2329         struct wpa_supplicant *prev;
2330
2331         /* Remove interface from the global list of interfaces */
2332         prev = global->ifaces;
2333         if (prev == wpa_s) {
2334                 global->ifaces = wpa_s->next;
2335         } else {
2336                 while (prev && prev->next != wpa_s)
2337                         prev = prev->next;
2338                 if (prev == NULL)
2339                         return -1;
2340                 prev->next = wpa_s->next;
2341         }
2342
2343         wpa_printf(MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2344
2345         wpa_supplicant_deinit_iface(wpa_s);
2346         os_free(wpa_s);
2347
2348         return 0;
2349 }
2350
2351
2352 /**
2353  * wpa_supplicant_get_iface - Get a new network interface
2354  * @global: Pointer to global data from wpa_supplicant_init()
2355  * @ifname: Interface name
2356  * Returns: Pointer to the interface or %NULL if not found
2357  */
2358 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2359                                                  const char *ifname)
2360 {
2361         struct wpa_supplicant *wpa_s;
2362
2363         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2364                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2365                         return wpa_s;
2366         }
2367         return NULL;
2368 }
2369
2370
2371 /**
2372  * wpa_supplicant_init - Initialize %wpa_supplicant
2373  * @params: Parameters for %wpa_supplicant
2374  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2375  *
2376  * This function is used to initialize %wpa_supplicant. After successful
2377  * initialization, the returned data pointer can be used to add and remove
2378  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2379  */
2380 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2381 {
2382         struct wpa_global *global;
2383         int ret, i;
2384
2385         if (params == NULL)
2386                 return NULL;
2387
2388         wpa_debug_open_file(params->wpa_debug_file_path);
2389         if (params->wpa_debug_syslog)
2390                 wpa_debug_open_syslog();
2391
2392         ret = eap_peer_register_methods();
2393         if (ret) {
2394                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2395                 if (ret == -2)
2396                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2397                                    "the same EAP type.");
2398                 return NULL;
2399         }
2400
2401 #ifdef CONFIG_AP
2402         ret = eap_server_register_methods();
2403         if (ret) {
2404                 wpa_printf(MSG_ERROR, "Failed to register EAP server methods");
2405                 if (ret == -2)
2406                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2407                                    "the same EAP type.");
2408                 return NULL;
2409         }
2410 #endif /* CONFIG_AP */
2411
2412         global = os_zalloc(sizeof(*global));
2413         if (global == NULL)
2414                 return NULL;
2415         global->params.daemonize = params->daemonize;
2416         global->params.wait_for_monitor = params->wait_for_monitor;
2417         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2418         if (params->pid_file)
2419                 global->params.pid_file = os_strdup(params->pid_file);
2420         if (params->ctrl_interface)
2421                 global->params.ctrl_interface =
2422                         os_strdup(params->ctrl_interface);
2423         if (params->override_driver)
2424                 global->params.override_driver =
2425                         os_strdup(params->override_driver);
2426         if (params->override_ctrl_interface)
2427                 global->params.override_ctrl_interface =
2428                         os_strdup(params->override_ctrl_interface);
2429         wpa_debug_level = global->params.wpa_debug_level =
2430                 params->wpa_debug_level;
2431         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2432                 params->wpa_debug_show_keys;
2433         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2434                 params->wpa_debug_timestamp;
2435
2436         if (eloop_init(global)) {
2437                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2438                 wpa_supplicant_deinit(global);
2439                 return NULL;
2440         }
2441
2442         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2443         if (global->ctrl_iface == NULL) {
2444                 wpa_supplicant_deinit(global);
2445                 return NULL;
2446         }
2447
2448         if (wpas_notify_supplicant_initialized(global)) {
2449                 wpa_supplicant_deinit(global);
2450                 return NULL;
2451         }
2452
2453         for (i = 0; wpa_drivers[i]; i++)
2454                 global->drv_count++;
2455         if (global->drv_count == 0) {
2456                 wpa_printf(MSG_ERROR, "No drivers enabled");
2457                 wpa_supplicant_deinit(global);
2458                 return NULL;
2459         }
2460         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2461         if (global->drv_priv == NULL) {
2462                 wpa_supplicant_deinit(global);
2463                 return NULL;
2464         }
2465         for (i = 0; wpa_drivers[i]; i++) {
2466                 if (!wpa_drivers[i]->global_init)
2467                         continue;
2468                 global->drv_priv[i] = wpa_drivers[i]->global_init();
2469                 if (global->drv_priv[i] == NULL) {
2470                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
2471                                    "'%s'", wpa_drivers[i]->name);
2472                         wpa_supplicant_deinit(global);
2473                         return NULL;
2474                 }
2475         }
2476
2477         return global;
2478 }
2479
2480
2481 /**
2482  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2483  * @global: Pointer to global data from wpa_supplicant_init()
2484  * Returns: 0 after successful event loop run, -1 on failure
2485  *
2486  * This function starts the main event loop and continues running as long as
2487  * there are any remaining events. In most cases, this function is running as
2488  * long as the %wpa_supplicant process in still in use.
2489  */
2490 int wpa_supplicant_run(struct wpa_global *global)
2491 {
2492         struct wpa_supplicant *wpa_s;
2493
2494         if (global->params.daemonize &&
2495             wpa_supplicant_daemon(global->params.pid_file))
2496                 return -1;
2497
2498         if (global->params.wait_for_monitor) {
2499                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2500                         if (wpa_s->ctrl_iface)
2501                                 wpa_supplicant_ctrl_iface_wait(
2502                                         wpa_s->ctrl_iface);
2503         }
2504
2505         eloop_register_signal_terminate(wpa_supplicant_terminate, NULL);
2506         eloop_register_signal_reconfig(wpa_supplicant_reconfig, NULL);
2507
2508         eloop_run();
2509
2510         return 0;
2511 }
2512
2513
2514 /**
2515  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2516  * @global: Pointer to global data from wpa_supplicant_init()
2517  *
2518  * This function is called to deinitialize %wpa_supplicant and to free all
2519  * allocated resources. Remaining network interfaces will also be removed.
2520  */
2521 void wpa_supplicant_deinit(struct wpa_global *global)
2522 {
2523         int i;
2524
2525         if (global == NULL)
2526                 return;
2527
2528         while (global->ifaces)
2529                 wpa_supplicant_remove_iface(global, global->ifaces);
2530
2531         if (global->ctrl_iface)
2532                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2533
2534         wpas_notify_supplicant_deinitialized(global);
2535
2536         eap_peer_unregister_methods();
2537 #ifdef CONFIG_AP
2538         eap_server_unregister_methods();
2539 #endif /* CONFIG_AP */
2540
2541         for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2542                 if (!global->drv_priv[i])
2543                         continue;
2544                 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2545         }
2546         os_free(global->drv_priv);
2547
2548         eloop_destroy();
2549
2550         if (global->params.pid_file) {
2551                 os_daemonize_terminate(global->params.pid_file);
2552                 os_free(global->params.pid_file);
2553         }
2554         os_free(global->params.ctrl_interface);
2555         os_free(global->params.override_driver);
2556         os_free(global->params.override_ctrl_interface);
2557
2558         os_free(global);
2559         wpa_debug_close_syslog();
2560         wpa_debug_close_file();
2561 }