wpa_supplicant/wpa_supplicant.c

   1 /*
   2  * WPA Supplicant
   3  * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  *
   8  * This file implements functions for registering and unregistering
   9  * %wpa_supplicant interfaces. In addition, this file contains number of
  10  * functions for managing network connections.
  11  */
  12
  13 #include "includes.h"
  14
  15 #include "common.h"
  16 #include "crypto/random.h"
  17 #include "crypto/sha1.h"
  18 #include "eapol_supp/eapol_supp_sm.h"
  19 #include "eap_peer/eap.h"
  20 #include "eap_server/eap_methods.h"
  21 #include "rsn_supp/wpa.h"
  22 #include "eloop.h"
  23 #include "config.h"
  24 #include "l2_packet/l2_packet.h"
  25 #include "wpa_supplicant_i.h"
  26 #include "driver_i.h"
  27 #include "ctrl_iface.h"
  28 #include "pcsc_funcs.h"
  29 #include "common/version.h"
  30 #include "rsn_supp/preauth.h"
  31 #include "rsn_supp/pmksa_cache.h"
  32 #include "common/wpa_ctrl.h"
  33 #include "common/ieee802_11_defs.h"
  34 #include "p2p/p2p.h"
  35 #include "blacklist.h"
  36 #include "wpas_glue.h"
  37 #include "wps_supplicant.h"
  38 #include "ibss_rsn.h"
  39 #include "sme.h"
  40 #include "gas_query.h"
  41 #include "ap.h"
  42 #include "p2p_supplicant.h"
  43 #include "notify.h"
  44 #include "bgscan.h"
  45 #include "bss.h"
  46 #include "scan.h"
  47 #include "offchannel.h"
  48
  49 const char *wpa_supplicant_version =
  50 "wpa_supplicant v" VERSION_STR "\n"
  51 "Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi> and contributors";
  52
  53 const char *wpa_supplicant_license =
  54 "This software may be distributed under the terms of the BSD license.\n"
  55 "See README for more details.\n"
  56 #ifdef EAP_TLS_OPENSSL
  57 "\nThis product includes software developed by the OpenSSL Project\n"
  58 "for use in the OpenSSL Toolkit (http://www.openssl.org/)\n"
  59 #endif /* EAP_TLS_OPENSSL */
  60 ;
  61
  62 #ifndef CONFIG_NO_STDOUT_DEBUG
  63 /* Long text divided into parts in order to fit in C89 strings size limits. */
  64 const char *wpa_supplicant_full_license1 =
  65 "";
  66 const char *wpa_supplicant_full_license2 =
  67 "This software may be distributed under the terms of the BSD license.\n"
  68 "\n"
  69 "Redistribution and use in source and binary forms, with or without\n"
  70 "modification, are permitted provided that the following conditions are\n"
  71 "met:\n"
  72 "\n";
  73 const char *wpa_supplicant_full_license3 =
  74 "1. Redistributions of source code must retain the above copyright\n"
  75 "   notice, this list of conditions and the following disclaimer.\n"
  76 "\n"
  77 "2. Redistributions in binary form must reproduce the above copyright\n"
  78 "   notice, this list of conditions and the following disclaimer in the\n"
  79 "   documentation and/or other materials provided with the distribution.\n"
  80 "\n";
  81 const char *wpa_supplicant_full_license4 =
  82 "3. Neither the name(s) of the above-listed copyright holder(s) nor the\n"
  83 "   names of its contributors may be used to endorse or promote products\n"
  84 "   derived from this software without specific prior written permission.\n"
  85 "\n"
  86 "THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n"
  87 "\"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n"
  88 "LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n"
  89 "A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n";
  90 const char *wpa_supplicant_full_license5 =
  91 "OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n"
  92 "SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n"
  93 "LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n"
  94 "DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n"
  95 "THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
  96 "(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n"
  97 "OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
  98 "\n";
  99 #endif /* CONFIG_NO_STDOUT_DEBUG */
 100
 101 extern int wpa_debug_level;
 102 extern int wpa_debug_show_keys;
 103 extern int wpa_debug_timestamp;
 104 extern struct wpa_driver_ops *wpa_drivers[];
 105
 106 /* Configure default/group WEP keys for static WEP */
 107 int wpa_set_wep_keys(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
 108 {
 109         int i, set = 0;
 110
 111         for (i = 0; i < NUM_WEP_KEYS; i++) {
 112                 if (ssid->wep_key_len[i] == 0)
 113                         continue;
 114
 115                 set = 1;
 116                 wpa_drv_set_key(wpa_s, WPA_ALG_WEP, NULL,
 117                                 i, i == ssid->wep_tx_keyidx, NULL, 0,
 118                                 ssid->wep_key[i], ssid->wep_key_len[i]);
 119         }
 120
 121         return set;
 122 }
 123
 124
 125 static int wpa_supplicant_set_wpa_none_key(struct wpa_supplicant *wpa_s,
 126                                            struct wpa_ssid *ssid)
 127 {
 128         u8 key[32];
 129         size_t keylen;
 130         enum wpa_alg alg;
 131         u8 seq[6] = { 0 };
 132
 133         /* IBSS/WPA-None uses only one key (Group) for both receiving and
 134          * sending unicast and multicast packets. */
 135
 136         if (ssid->mode != WPAS_MODE_IBSS) {
 137                 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid mode %d (not "
 138                         "IBSS/ad-hoc) for WPA-None", ssid->mode);
 139                 return -1;
 140         }
 141
 142         if (!ssid->psk_set) {
 143                 wpa_msg(wpa_s, MSG_INFO, "WPA: No PSK configured for "
 144                         "WPA-None");
 145                 return -1;
 146         }
 147
 148         switch (wpa_s->group_cipher) {
 149         case WPA_CIPHER_CCMP:
 150                 os_memcpy(key, ssid->psk, 16);
 151                 keylen = 16;
 152                 alg = WPA_ALG_CCMP;
 153                 break;
 154         case WPA_CIPHER_TKIP:
 155                 /* WPA-None uses the same Michael MIC key for both TX and RX */
 156                 os_memcpy(key, ssid->psk, 16 + 8);
 157                 os_memcpy(key + 16 + 8, ssid->psk + 16, 8);
 158                 keylen = 32;
 159                 alg = WPA_ALG_TKIP;
 160                 break;
 161         default:
 162                 wpa_msg(wpa_s, MSG_INFO, "WPA: Invalid group cipher %d for "
 163                         "WPA-None", wpa_s->group_cipher);
 164                 return -1;
 165         }
 166
 167         /* TODO: should actually remember the previously used seq#, both for TX
 168          * and RX from each STA.. */
 169
 170         return wpa_drv_set_key(wpa_s, alg, NULL, 0, 1, seq, 6, key, keylen);
 171 }
 172
 173
 174 static void wpa_supplicant_timeout(void *eloop_ctx, void *timeout_ctx)
 175 {
 176         struct wpa_supplicant *wpa_s = eloop_ctx;
 177         const u8 *bssid = wpa_s->bssid;
 178         if (is_zero_ether_addr(bssid))
 179                 bssid = wpa_s->pending_bssid;
 180         wpa_msg(wpa_s, MSG_INFO, "Authentication with " MACSTR " timed out.",
 181                 MAC2STR(bssid));
 182         wpa_blacklist_add(wpa_s, bssid);
 183         wpa_sm_notify_disassoc(wpa_s->wpa);
 184         wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 185         wpa_s->reassociate = 1;
 186
 187         /*
 188          * If we timed out, the AP or the local radio may be busy.
 189          * So, wait a second until scanning again.
 190          */
 191         wpa_supplicant_req_scan(wpa_s, 1, 0);
 192 }
 193
 194
 195 /**
 196  * wpa_supplicant_req_auth_timeout - Schedule a timeout for authentication
 197  * @wpa_s: Pointer to wpa_supplicant data
 198  * @sec: Number of seconds after which to time out authentication
 199  * @usec: Number of microseconds after which to time out authentication
 200  *
 201  * This function is used to schedule a timeout for the current authentication
 202  * attempt.
 203  */
 204 void wpa_supplicant_req_auth_timeout(struct wpa_supplicant *wpa_s,
 205                                      int sec, int usec)
 206 {
 207         if (wpa_s->conf && wpa_s->conf->ap_scan == 0 &&
 208             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 209                 return;
 210
 211         wpa_dbg(wpa_s, MSG_DEBUG, "Setting authentication timeout: %d sec "
 212                 "%d usec", sec, usec);
 213         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 214         eloop_register_timeout(sec, usec, wpa_supplicant_timeout, wpa_s, NULL);
 215 }
 216
 217
 218 /**
 219  * wpa_supplicant_cancel_auth_timeout - Cancel authentication timeout
 220  * @wpa_s: Pointer to wpa_supplicant data
 221  *
 222  * This function is used to cancel authentication timeout scheduled with
 223  * wpa_supplicant_req_auth_timeout() and it is called when authentication has
 224  * been completed.
 225  */
 226 void wpa_supplicant_cancel_auth_timeout(struct wpa_supplicant *wpa_s)
 227 {
 228         wpa_dbg(wpa_s, MSG_DEBUG, "Cancelling authentication timeout");
 229         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
 230         wpa_blacklist_del(wpa_s, wpa_s->bssid);
 231 }
 232
 233
 234 /**
 235  * wpa_supplicant_initiate_eapol - Configure EAPOL state machine
 236  * @wpa_s: Pointer to wpa_supplicant data
 237  *
 238  * This function is used to configure EAPOL state machine based on the selected
 239  * authentication mode.
 240  */
 241 void wpa_supplicant_initiate_eapol(struct wpa_supplicant *wpa_s)
 242 {
 243 #ifdef IEEE8021X_EAPOL
 244         struct eapol_config eapol_conf;
 245         struct wpa_ssid *ssid = wpa_s->current_ssid;
 246
 247 #ifdef CONFIG_IBSS_RSN
 248         if (ssid->mode == WPAS_MODE_IBSS &&
 249             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
 250             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
 251                 /*
 252                  * RSN IBSS authentication is per-STA and we can disable the
 253                  * per-BSSID EAPOL authentication.
 254                  */
 255                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 256                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 257                 eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 258                 return;
 259         }
 260 #endif /* CONFIG_IBSS_RSN */
 261
 262         eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 263         eapol_sm_notify_eap_fail(wpa_s->eapol, FALSE);
 264
 265         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 266             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 267                 eapol_sm_notify_portControl(wpa_s->eapol, ForceAuthorized);
 268         else
 269                 eapol_sm_notify_portControl(wpa_s->eapol, Auto);
 270
 271         os_memset(&eapol_conf, 0, sizeof(eapol_conf));
 272         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
 273                 eapol_conf.accept_802_1x_keys = 1;
 274                 eapol_conf.required_keys = 0;
 275                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_UNICAST) {
 276                         eapol_conf.required_keys |= EAPOL_REQUIRE_KEY_UNICAST;
 277                 }
 278                 if (ssid->eapol_flags & EAPOL_FLAG_REQUIRE_KEY_BROADCAST) {
 279                         eapol_conf.required_keys |=
 280                                 EAPOL_REQUIRE_KEY_BROADCAST;
 281                 }
 282
 283                 if (wpa_s->conf && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED))
 284                         eapol_conf.required_keys = 0;
 285         }
 286         if (wpa_s->conf)
 287                 eapol_conf.fast_reauth = wpa_s->conf->fast_reauth;
 288         eapol_conf.workaround = ssid->eap_workaround;
 289         eapol_conf.eap_disabled =
 290                 !wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) &&
 291                 wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 292                 wpa_s->key_mgmt != WPA_KEY_MGMT_WPS;
 293         eapol_sm_notify_config(wpa_s->eapol, &ssid->eap, &eapol_conf);
 294 #endif /* IEEE8021X_EAPOL */
 295 }
 296
 297
 298 /**
 299  * wpa_supplicant_set_non_wpa_policy - Set WPA parameters to non-WPA mode
 300  * @wpa_s: Pointer to wpa_supplicant data
 301  * @ssid: Configuration data for the network
 302  *
 303  * This function is used to configure WPA state machine and related parameters
 304  * to a mode where WPA is not enabled. This is called as part of the
 305  * authentication configuration when the selected network does not use WPA.
 306  */
 307 void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 308                                        struct wpa_ssid *ssid)
 309 {
 310         int i;
 311
 312         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 313                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
 314         else if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)
 315                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 316         else
 317                 wpa_s->key_mgmt = WPA_KEY_MGMT_NONE;
 318         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 319         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 320         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 321         wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 322         wpa_s->group_cipher = WPA_CIPHER_NONE;
 323         wpa_s->mgmt_group_cipher = 0;
 324
 325         for (i = 0; i < NUM_WEP_KEYS; i++) {
 326                 if (ssid->wep_key_len[i] > 5) {
 327                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP104;
 328                         wpa_s->group_cipher = WPA_CIPHER_WEP104;
 329                         break;
 330                 } else if (ssid->wep_key_len[i] > 0) {
 331                         wpa_s->pairwise_cipher = WPA_CIPHER_WEP40;
 332                         wpa_s->group_cipher = WPA_CIPHER_WEP40;
 333                         break;
 334                 }
 335         }
 336
 337         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED, 0);
 338         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
 339         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
 340                          wpa_s->pairwise_cipher);
 341         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
 342 #ifdef CONFIG_IEEE80211W
 343         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
 344                          wpa_s->mgmt_group_cipher);
 345 #endif /* CONFIG_IEEE80211W */
 346
 347         pmksa_cache_clear_current(wpa_s->wpa);
 348 }
 349
 350
 351 static void free_hw_features(struct wpa_supplicant *wpa_s)
 352 {
 353         int i;
 354         if (wpa_s->hw.modes == NULL)
 355                 return;
 356
 357         for (i = 0; i < wpa_s->hw.num_modes; i++) {
 358                 os_free(wpa_s->hw.modes[i].channels);
 359                 os_free(wpa_s->hw.modes[i].rates);
 360         }
 361
 362         os_free(wpa_s->hw.modes);
 363         wpa_s->hw.modes = NULL;
 364 }
 365
 366
 367 static void wpa_supplicant_cleanup(struct wpa_supplicant *wpa_s)
 368 {
 369         bgscan_deinit(wpa_s);
 370         scard_deinit(wpa_s->scard);
 371         wpa_s->scard = NULL;
 372         wpa_sm_set_scard_ctx(wpa_s->wpa, NULL);
 373         eapol_sm_register_scard_ctx(wpa_s->eapol, NULL);
 374         l2_packet_deinit(wpa_s->l2);
 375         wpa_s->l2 = NULL;
 376         if (wpa_s->l2_br) {
 377                 l2_packet_deinit(wpa_s->l2_br);
 378                 wpa_s->l2_br = NULL;
 379         }
 380
 381         if (wpa_s->conf != NULL) {
 382                 struct wpa_ssid *ssid;
 383                 for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
 384                         wpas_notify_network_removed(wpa_s, ssid);
 385         }
 386
 387         os_free(wpa_s->confname);
 388         wpa_s->confname = NULL;
 389
 390         wpa_sm_set_eapol(wpa_s->wpa, NULL);
 391         eapol_sm_deinit(wpa_s->eapol);
 392         wpa_s->eapol = NULL;
 393
 394         rsn_preauth_deinit(wpa_s->wpa);
 395
 396 #ifdef CONFIG_TDLS
 397         wpa_tdls_deinit(wpa_s->wpa);
 398 #endif /* CONFIG_TDLS */
 399
 400         pmksa_candidate_free(wpa_s->wpa);
 401         wpa_sm_deinit(wpa_s->wpa);
 402         wpa_s->wpa = NULL;
 403         wpa_blacklist_clear(wpa_s);
 404
 405         wpa_bss_deinit(wpa_s);
 406
 407         wpa_supplicant_cancel_scan(wpa_s);
 408         wpa_supplicant_cancel_auth_timeout(wpa_s);
 409         eloop_cancel_timeout(wpa_supplicant_stop_countermeasures, wpa_s, NULL);
 410 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
 411         eloop_cancel_timeout(wpa_supplicant_delayed_mic_error_report,
 412                              wpa_s, NULL);
 413 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
 414
 415         wpas_wps_deinit(wpa_s);
 416
 417         wpabuf_free(wpa_s->pending_eapol_rx);
 418         wpa_s->pending_eapol_rx = NULL;
 419
 420 #ifdef CONFIG_IBSS_RSN
 421         ibss_rsn_deinit(wpa_s->ibss_rsn);
 422         wpa_s->ibss_rsn = NULL;
 423 #endif /* CONFIG_IBSS_RSN */
 424
 425         sme_deinit(wpa_s);
 426
 427 #ifdef CONFIG_AP
 428         wpa_supplicant_ap_deinit(wpa_s);
 429 #endif /* CONFIG_AP */
 430
 431 #ifdef CONFIG_P2P
 432         wpas_p2p_deinit(wpa_s);
 433 #endif /* CONFIG_P2P */
 434
 435 #ifdef CONFIG_OFFCHANNEL
 436         offchannel_deinit(wpa_s);
 437 #endif /* CONFIG_OFFCHANNEL */
 438
 439         wpa_supplicant_cancel_sched_scan(wpa_s);
 440
 441         os_free(wpa_s->next_scan_freqs);
 442         wpa_s->next_scan_freqs = NULL;
 443
 444         gas_query_deinit(wpa_s->gas);
 445         wpa_s->gas = NULL;
 446
 447         free_hw_features(wpa_s);
 448 }
 449
 450
 451 /**
 452  * wpa_clear_keys - Clear keys configured for the driver
 453  * @wpa_s: Pointer to wpa_supplicant data
 454  * @addr: Previously used BSSID or %NULL if not available
 455  *
 456  * This function clears the encryption keys that has been previously configured
 457  * for the driver.
 458  */
 459 void wpa_clear_keys(struct wpa_supplicant *wpa_s, const u8 *addr)
 460 {
 461         if (wpa_s->keys_cleared) {
 462                 /* Some drivers (e.g., ndiswrapper & NDIS drivers) seem to have
 463                  * timing issues with keys being cleared just before new keys
 464                  * are set or just after association or something similar. This
 465                  * shows up in group key handshake failing often because of the
 466                  * client not receiving the first encrypted packets correctly.
 467                  * Skipping some of the extra key clearing steps seems to help
 468                  * in completing group key handshake more reliably. */
 469                 wpa_dbg(wpa_s, MSG_DEBUG, "No keys have been configured - "
 470                         "skip key clearing");
 471                 return;
 472         }
 473
 474         /* MLME-DELETEKEYS.request */
 475         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 0, 0, NULL, 0, NULL, 0);
 476         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 1, 0, NULL, 0, NULL, 0);
 477         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 2, 0, NULL, 0, NULL, 0);
 478         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 3, 0, NULL, 0, NULL, 0);
 479 #ifdef CONFIG_IEEE80211W
 480         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 4, 0, NULL, 0, NULL, 0);
 481         wpa_drv_set_key(wpa_s, WPA_ALG_NONE, NULL, 5, 0, NULL, 0, NULL, 0);
 482 #endif /* CONFIG_IEEE80211W */
 483         if (addr) {
 484                 wpa_drv_set_key(wpa_s, WPA_ALG_NONE, addr, 0, 0, NULL, 0, NULL,
 485                                 0);
 486                 /* MLME-SETPROTECTION.request(None) */
 487                 wpa_drv_mlme_setprotection(
 488                         wpa_s, addr,
 489                         MLME_SETPROTECTION_PROTECT_TYPE_NONE,
 490                         MLME_SETPROTECTION_KEY_TYPE_PAIRWISE);
 491         }
 492         wpa_s->keys_cleared = 1;
 493 }
 494
 495
 496 /**
 497  * wpa_supplicant_state_txt - Get the connection state name as a text string
 498  * @state: State (wpa_state; WPA_*)
 499  * Returns: The state name as a printable text string
 500  */
 501 const char * wpa_supplicant_state_txt(enum wpa_states state)
 502 {
 503         switch (state) {
 504         case WPA_DISCONNECTED:
 505                 return "DISCONNECTED";
 506         case WPA_INACTIVE:
 507                 return "INACTIVE";
 508         case WPA_INTERFACE_DISABLED:
 509                 return "INTERFACE_DISABLED";
 510         case WPA_SCANNING:
 511                 return "SCANNING";
 512         case WPA_AUTHENTICATING:
 513                 return "AUTHENTICATING";
 514         case WPA_ASSOCIATING:
 515                 return "ASSOCIATING";
 516         case WPA_ASSOCIATED:
 517                 return "ASSOCIATED";
 518         case WPA_4WAY_HANDSHAKE:
 519                 return "4WAY_HANDSHAKE";
 520         case WPA_GROUP_HANDSHAKE:
 521                 return "GROUP_HANDSHAKE";
 522         case WPA_COMPLETED:
 523                 return "COMPLETED";
 524         default:
 525                 return "UNKNOWN";
 526         }
 527 }
 528
 529
 530 #ifdef CONFIG_BGSCAN
 531
 532 static void wpa_supplicant_start_bgscan(struct wpa_supplicant *wpa_s)
 533 {
 534         if (wpas_driver_bss_selection(wpa_s))
 535                 return;
 536         if (wpa_s->current_ssid == wpa_s->bgscan_ssid)
 537                 return;
 538
 539         bgscan_deinit(wpa_s);
 540         if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
 541                 if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
 542                         wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
 543                                 "bgscan");
 544                         /*
 545                          * Live without bgscan; it is only used as a roaming
 546                          * optimization, so the initial connection is not
 547                          * affected.
 548                          */
 549                 } else
 550                         wpa_s->bgscan_ssid = wpa_s->current_ssid;
 551         } else
 552                 wpa_s->bgscan_ssid = NULL;
 553 }
 554
 555
 556 static void wpa_supplicant_stop_bgscan(struct wpa_supplicant *wpa_s)
 557 {
 558         if (wpa_s->bgscan_ssid != NULL) {
 559                 bgscan_deinit(wpa_s);
 560                 wpa_s->bgscan_ssid = NULL;
 561         }
 562 }
 563
 564 #endif /* CONFIG_BGSCAN */
 565
 566
 567 /**
 568  * wpa_supplicant_set_state - Set current connection state
 569  * @wpa_s: Pointer to wpa_supplicant data
 570  * @state: The new connection state
 571  *
 572  * This function is called whenever the connection state changes, e.g.,
 573  * association is completed for WPA/WPA2 4-Way Handshake is started.
 574  */
 575 void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
 576                               enum wpa_states state)
 577 {
 578         enum wpa_states old_state = wpa_s->wpa_state;
 579
 580         wpa_dbg(wpa_s, MSG_DEBUG, "State: %s -> %s",
 581                 wpa_supplicant_state_txt(wpa_s->wpa_state),
 582                 wpa_supplicant_state_txt(state));
 583
 584 #ifdef ANDROID_P2P
 585         if(state == WPA_ASSOCIATED && wpa_s->current_ssid) {
 586                 wpa_s->current_ssid->assoc_retry = 0;
 587         }
 588 #endif /* ANDROID_P2P */
 589
 590         if (state != WPA_SCANNING)
 591                 wpa_supplicant_notify_scanning(wpa_s, 0);
 592
 593         if (state == WPA_COMPLETED && wpa_s->new_connection) {
 594 #if defined(CONFIG_CTRL_IFACE) || !defined(CONFIG_NO_STDOUT_DEBUG)
 595                 struct wpa_ssid *ssid = wpa_s->current_ssid;
 596                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_CONNECTED "- Connection to "
 597                         MACSTR " completed %s [id=%d id_str=%s]",
 598                         MAC2STR(wpa_s->bssid), wpa_s->reassociated_connection ?
 599                         "(reauth)" : "(auth)",
 600                         ssid ? ssid->id : -1,
 601                         ssid && ssid->id_str ? ssid->id_str : "");
 602 #endif /* CONFIG_CTRL_IFACE || !CONFIG_NO_STDOUT_DEBUG */
 603                 wpa_s->new_connection = 0;
 604                 wpa_s->reassociated_connection = 1;
 605                 wpa_drv_set_operstate(wpa_s, 1);
 606 #ifndef IEEE8021X_EAPOL
 607                 wpa_drv_set_supp_port(wpa_s, 1);
 608 #endif /* IEEE8021X_EAPOL */
 609                 wpa_s->after_wps = 0;
 610 #ifdef CONFIG_P2P
 611                 wpas_p2p_completed(wpa_s);
 612 #endif /* CONFIG_P2P */
 613         } else if (state == WPA_DISCONNECTED || state == WPA_ASSOCIATING ||
 614                    state == WPA_ASSOCIATED) {
 615                 wpa_s->new_connection = 1;
 616                 wpa_drv_set_operstate(wpa_s, 0);
 617 #ifndef IEEE8021X_EAPOL
 618                 wpa_drv_set_supp_port(wpa_s, 0);
 619 #endif /* IEEE8021X_EAPOL */
 620         }
 621         wpa_s->wpa_state = state;
 622
 623 #ifdef CONFIG_BGSCAN
 624         if (state == WPA_COMPLETED)
 625                 wpa_supplicant_start_bgscan(wpa_s);
 626         else
 627                 wpa_supplicant_stop_bgscan(wpa_s);
 628 #endif /* CONFIG_BGSCAN */
 629
 630         if (wpa_s->wpa_state != old_state) {
 631                 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
 632
 633                 if (wpa_s->wpa_state == WPA_COMPLETED ||
 634                     old_state == WPA_COMPLETED)
 635                         wpas_notify_auth_changed(wpa_s);
 636         }
 637 }
 638
 639
 640 void wpa_supplicant_terminate_proc(struct wpa_global *global)
 641 {
 642         int pending = 0;
 643 #ifdef CONFIG_WPS
 644         struct wpa_supplicant *wpa_s = global->ifaces;
 645         while (wpa_s) {
 646                 if (wpas_wps_terminate_pending(wpa_s) == 1)
 647                         pending = 1;
 648                 wpa_s = wpa_s->next;
 649         }
 650 #endif /* CONFIG_WPS */
 651         if (pending)
 652                 return;
 653         eloop_terminate();
 654 }
 655
 656
 657 static void wpa_supplicant_terminate(int sig, void *signal_ctx)
 658 {
 659         struct wpa_global *global = signal_ctx;
 660         wpa_supplicant_terminate_proc(global);
 661 }
 662
 663
 664 void wpa_supplicant_clear_status(struct wpa_supplicant *wpa_s)
 665 {
 666         enum wpa_states old_state = wpa_s->wpa_state;
 667
 668         wpa_s->pairwise_cipher = 0;
 669         wpa_s->group_cipher = 0;
 670         wpa_s->mgmt_group_cipher = 0;
 671         wpa_s->key_mgmt = 0;
 672         if (wpa_s->wpa_state != WPA_INTERFACE_DISABLED)
 673                 wpa_s->wpa_state = WPA_DISCONNECTED;
 674
 675         if (wpa_s->wpa_state != old_state)
 676                 wpas_notify_state_changed(wpa_s, wpa_s->wpa_state, old_state);
 677 }
 678
 679
 680 /**
 681  * wpa_supplicant_reload_configuration - Reload configuration data
 682  * @wpa_s: Pointer to wpa_supplicant data
 683  * Returns: 0 on success or -1 if configuration parsing failed
 684  *
 685  * This function can be used to request that the configuration data is reloaded
 686  * (e.g., after configuration file change). This function is reloading
 687  * configuration only for one interface, so this may need to be called multiple
 688  * times if %wpa_supplicant is controlling multiple interfaces and all
 689  * interfaces need reconfiguration.
 690  */
 691 int wpa_supplicant_reload_configuration(struct wpa_supplicant *wpa_s)
 692 {
 693         struct wpa_config *conf;
 694         int reconf_ctrl;
 695         int old_ap_scan;
 696
 697         if (wpa_s->confname == NULL)
 698                 return -1;
 699         conf = wpa_config_read(wpa_s->confname);
 700         if (conf == NULL) {
 701                 wpa_msg(wpa_s, MSG_ERROR, "Failed to parse the configuration "
 702                         "file '%s' - exiting", wpa_s->confname);
 703                 return -1;
 704         }
 705         conf->changed_parameters = (unsigned int) -1;
 706
 707         reconf_ctrl = !!conf->ctrl_interface != !!wpa_s->conf->ctrl_interface
 708                 || (conf->ctrl_interface && wpa_s->conf->ctrl_interface &&
 709                     os_strcmp(conf->ctrl_interface,
 710                               wpa_s->conf->ctrl_interface) != 0);
 711
 712         if (reconf_ctrl && wpa_s->ctrl_iface) {
 713                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
 714                 wpa_s->ctrl_iface = NULL;
 715         }
 716
 717         eapol_sm_invalidate_cached_session(wpa_s->eapol);
 718         if (wpa_s->current_ssid) {
 719                 wpa_supplicant_deauthenticate(wpa_s,
 720                                               WLAN_REASON_DEAUTH_LEAVING);
 721         }
 722
 723         /*
 724          * TODO: should notify EAPOL SM about changes in opensc_engine_path,
 725          * pkcs11_engine_path, pkcs11_module_path.
 726          */
 727         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 728                 /*
 729                  * Clear forced success to clear EAP state for next
 730                  * authentication.
 731                  */
 732                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 733         }
 734         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 735         wpa_sm_set_config(wpa_s->wpa, NULL);
 736         wpa_sm_pmksa_cache_flush(wpa_s->wpa, NULL);
 737         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
 738         rsn_preauth_deinit(wpa_s->wpa);
 739
 740         old_ap_scan = wpa_s->conf->ap_scan;
 741         wpa_config_free(wpa_s->conf);
 742         wpa_s->conf = conf;
 743         if (old_ap_scan != wpa_s->conf->ap_scan)
 744                 wpas_notify_ap_scan_changed(wpa_s);
 745
 746         if (reconf_ctrl)
 747                 wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
 748
 749         wpa_supplicant_update_config(wpa_s);
 750
 751         wpa_supplicant_clear_status(wpa_s);
 752         if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
 753                 wpa_s->reassociate = 1;
 754                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 755         }
 756         wpa_dbg(wpa_s, MSG_DEBUG, "Reconfiguration completed");
 757         return 0;
 758 }
 759
 760
 761 static void wpa_supplicant_reconfig(int sig, void *signal_ctx)
 762 {
 763         struct wpa_global *global = signal_ctx;
 764         struct wpa_supplicant *wpa_s;
 765         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
 766                 wpa_dbg(wpa_s, MSG_DEBUG, "Signal %d received - reconfiguring",
 767                         sig);
 768                 if (wpa_supplicant_reload_configuration(wpa_s) < 0) {
 769                         wpa_supplicant_terminate_proc(global);
 770                 }
 771         }
 772 }
 773
 774
 775 enum wpa_cipher cipher_suite2driver(int cipher)
 776 {
 777         switch (cipher) {
 778         case WPA_CIPHER_NONE:
 779                 return CIPHER_NONE;
 780         case WPA_CIPHER_WEP40:
 781                 return CIPHER_WEP40;
 782         case WPA_CIPHER_WEP104:
 783                 return CIPHER_WEP104;
 784         case WPA_CIPHER_CCMP:
 785                 return CIPHER_CCMP;
 786         case WPA_CIPHER_TKIP:
 787         default:
 788                 return CIPHER_TKIP;
 789         }
 790 }
 791
 792
 793 enum wpa_key_mgmt key_mgmt2driver(int key_mgmt)
 794 {
 795         switch (key_mgmt) {
 796         case WPA_KEY_MGMT_NONE:
 797                 return KEY_MGMT_NONE;
 798         case WPA_KEY_MGMT_IEEE8021X_NO_WPA:
 799                 return KEY_MGMT_802_1X_NO_WPA;
 800         case WPA_KEY_MGMT_IEEE8021X:
 801                 return KEY_MGMT_802_1X;
 802         case WPA_KEY_MGMT_WPA_NONE:
 803                 return KEY_MGMT_WPA_NONE;
 804         case WPA_KEY_MGMT_FT_IEEE8021X:
 805                 return KEY_MGMT_FT_802_1X;
 806         case WPA_KEY_MGMT_FT_PSK:
 807                 return KEY_MGMT_FT_PSK;
 808         case WPA_KEY_MGMT_IEEE8021X_SHA256:
 809                 return KEY_MGMT_802_1X_SHA256;
 810         case WPA_KEY_MGMT_PSK_SHA256:
 811                 return KEY_MGMT_PSK_SHA256;
 812         case WPA_KEY_MGMT_WPS:
 813                 return KEY_MGMT_WPS;
 814         case WPA_KEY_MGMT_PSK:
 815         default:
 816                 return KEY_MGMT_PSK;
 817         }
 818 }
 819
 820
 821 static int wpa_supplicant_suites_from_ai(struct wpa_supplicant *wpa_s,
 822                                          struct wpa_ssid *ssid,
 823                                          struct wpa_ie_data *ie)
 824 {
 825         int ret = wpa_sm_parse_own_wpa_ie(wpa_s->wpa, ie);
 826         if (ret) {
 827                 if (ret == -2) {
 828                         wpa_msg(wpa_s, MSG_INFO, "WPA: Failed to parse WPA IE "
 829                                 "from association info");
 830                 }
 831                 return -1;
 832         }
 833
 834         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Using WPA IE from AssocReq to set "
 835                 "cipher suites");
 836         if (!(ie->group_cipher & ssid->group_cipher)) {
 837                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled group "
 838                         "cipher 0x%x (mask 0x%x) - reject",
 839                         ie->group_cipher, ssid->group_cipher);
 840                 return -1;
 841         }
 842         if (!(ie->pairwise_cipher & ssid->pairwise_cipher)) {
 843                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled pairwise "
 844                         "cipher 0x%x (mask 0x%x) - reject",
 845                         ie->pairwise_cipher, ssid->pairwise_cipher);
 846                 return -1;
 847         }
 848         if (!(ie->key_mgmt & ssid->key_mgmt)) {
 849                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver used disabled key "
 850                         "management 0x%x (mask 0x%x) - reject",
 851                         ie->key_mgmt, ssid->key_mgmt);
 852                 return -1;
 853         }
 854
 855 #ifdef CONFIG_IEEE80211W
 856         if (!(ie->capabilities & WPA_CAPABILITY_MFPC) &&
 857             ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
 858                 wpa_msg(wpa_s, MSG_INFO, "WPA: Driver associated with an AP "
 859                         "that does not support management frame protection - "
 860                         "reject");
 861                 return -1;
 862         }
 863 #endif /* CONFIG_IEEE80211W */
 864
 865         return 0;
 866 }
 867
 868
 869 /**
 870  * wpa_supplicant_set_suites - Set authentication and encryption parameters
 871  * @wpa_s: Pointer to wpa_supplicant data
 872  * @bss: Scan results for the selected BSS, or %NULL if not available
 873  * @ssid: Configuration data for the selected network
 874  * @wpa_ie: Buffer for the WPA/RSN IE
 875  * @wpa_ie_len: Maximum wpa_ie buffer size on input. This is changed to be the
 876  * used buffer length in case the functions returns success.
 877  * Returns: 0 on success or -1 on failure
 878  *
 879  * This function is used to configure authentication and encryption parameters
 880  * based on the network configuration and scan result for the selected BSS (if
 881  * available).
 882  */
 883 int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 884                               struct wpa_bss *bss, struct wpa_ssid *ssid,
 885                               u8 *wpa_ie, size_t *wpa_ie_len)
 886 {
 887         struct wpa_ie_data ie;
 888         int sel, proto;
 889         const u8 *bss_wpa, *bss_rsn;
 890
 891         if (bss) {
 892                 bss_wpa = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 893                 bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 894         } else
 895                 bss_wpa = bss_rsn = NULL;
 896
 897         if (bss_rsn && (ssid->proto & WPA_PROTO_RSN) &&
 898             wpa_parse_wpa_ie(bss_rsn, 2 + bss_rsn[1], &ie) == 0 &&
 899             (ie.group_cipher & ssid->group_cipher) &&
 900             (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 901             (ie.key_mgmt & ssid->key_mgmt)) {
 902                 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: using IEEE 802.11i/D9.0");
 903                 proto = WPA_PROTO_RSN;
 904         } else if (bss_wpa && (ssid->proto & WPA_PROTO_WPA) &&
 905                    wpa_parse_wpa_ie(bss_wpa, 2 +bss_wpa[1], &ie) == 0 &&
 906                    (ie.group_cipher & ssid->group_cipher) &&
 907                    (ie.pairwise_cipher & ssid->pairwise_cipher) &&
 908                    (ie.key_mgmt & ssid->key_mgmt)) {
 909                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using IEEE 802.11i/D3.0");
 910                 proto = WPA_PROTO_WPA;
 911         } else if (bss) {
 912                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select WPA/RSN");
 913                 return -1;
 914         } else {
 915                 if (ssid->proto & WPA_PROTO_RSN)
 916                         proto = WPA_PROTO_RSN;
 917                 else
 918                         proto = WPA_PROTO_WPA;
 919                 if (wpa_supplicant_suites_from_ai(wpa_s, ssid, &ie) < 0) {
 920                         os_memset(&ie, 0, sizeof(ie));
 921                         ie.group_cipher = ssid->group_cipher;
 922                         ie.pairwise_cipher = ssid->pairwise_cipher;
 923                         ie.key_mgmt = ssid->key_mgmt;
 924 #ifdef CONFIG_IEEE80211W
 925                         ie.mgmt_group_cipher =
 926                                 ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION ?
 927                                 WPA_CIPHER_AES_128_CMAC : 0;
 928 #endif /* CONFIG_IEEE80211W */
 929                         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Set cipher suites "
 930                                 "based on configuration");
 931                 } else
 932                         proto = ie.proto;
 933         }
 934
 935         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected cipher suites: group %d "
 936                 "pairwise %d key_mgmt %d proto %d",
 937                 ie.group_cipher, ie.pairwise_cipher, ie.key_mgmt, proto);
 938 #ifdef CONFIG_IEEE80211W
 939         if (ssid->ieee80211w) {
 940                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected mgmt group cipher %d",
 941                         ie.mgmt_group_cipher);
 942         }
 943 #endif /* CONFIG_IEEE80211W */
 944
 945         wpa_s->wpa_proto = proto;
 946         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, proto);
 947         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_RSN_ENABLED,
 948                          !!(ssid->proto & WPA_PROTO_RSN));
 949
 950         if (bss || !wpa_s->ap_ies_from_associnfo) {
 951                 if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
 952                                          bss_wpa ? 2 + bss_wpa[1] : 0) ||
 953                     wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
 954                                          bss_rsn ? 2 + bss_rsn[1] : 0))
 955                         return -1;
 956         }
 957
 958         sel = ie.group_cipher & ssid->group_cipher;
 959         if (sel & WPA_CIPHER_CCMP) {
 960                 wpa_s->group_cipher = WPA_CIPHER_CCMP;
 961                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK CCMP");
 962         } else if (sel & WPA_CIPHER_TKIP) {
 963                 wpa_s->group_cipher = WPA_CIPHER_TKIP;
 964                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK TKIP");
 965         } else if (sel & WPA_CIPHER_WEP104) {
 966                 wpa_s->group_cipher = WPA_CIPHER_WEP104;
 967                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP104");
 968         } else if (sel & WPA_CIPHER_WEP40) {
 969                 wpa_s->group_cipher = WPA_CIPHER_WEP40;
 970                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using GTK WEP40");
 971         } else {
 972                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select group "
 973                         "cipher");
 974                 return -1;
 975         }
 976
 977         sel = ie.pairwise_cipher & ssid->pairwise_cipher;
 978         if (sel & WPA_CIPHER_CCMP) {
 979                 wpa_s->pairwise_cipher = WPA_CIPHER_CCMP;
 980                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK CCMP");
 981         } else if (sel & WPA_CIPHER_TKIP) {
 982                 wpa_s->pairwise_cipher = WPA_CIPHER_TKIP;
 983                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK TKIP");
 984         } else if (sel & WPA_CIPHER_NONE) {
 985                 wpa_s->pairwise_cipher = WPA_CIPHER_NONE;
 986                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using PTK NONE");
 987         } else {
 988                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select pairwise "
 989                         "cipher");
 990                 return -1;
 991         }
 992
 993         sel = ie.key_mgmt & ssid->key_mgmt;
 994         if (0) {
 995 #ifdef CONFIG_IEEE80211R
 996         } else if (sel & WPA_KEY_MGMT_FT_IEEE8021X) {
 997                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_IEEE8021X;
 998                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/802.1X");
 999         } else if (sel & WPA_KEY_MGMT_FT_PSK) {
1000                 wpa_s->key_mgmt = WPA_KEY_MGMT_FT_PSK;
1001                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT FT/PSK");
1002 #endif /* CONFIG_IEEE80211R */
1003 #ifdef CONFIG_IEEE80211W
1004         } else if (sel & WPA_KEY_MGMT_IEEE8021X_SHA256) {
1005                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X_SHA256;
1006                 wpa_dbg(wpa_s, MSG_DEBUG,
1007                         "WPA: using KEY_MGMT 802.1X with SHA256");
1008         } else if (sel & WPA_KEY_MGMT_PSK_SHA256) {
1009                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
1010                 wpa_dbg(wpa_s, MSG_DEBUG,
1011                         "WPA: using KEY_MGMT PSK with SHA256");
1012 #endif /* CONFIG_IEEE80211W */
1013         } else if (sel & WPA_KEY_MGMT_IEEE8021X) {
1014                 wpa_s->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
1015                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT 802.1X");
1016         } else if (sel & WPA_KEY_MGMT_PSK) {
1017                 wpa_s->key_mgmt = WPA_KEY_MGMT_PSK;
1018                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-PSK");
1019         } else if (sel & WPA_KEY_MGMT_WPA_NONE) {
1020                 wpa_s->key_mgmt = WPA_KEY_MGMT_WPA_NONE;
1021                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using KEY_MGMT WPA-NONE");
1022         } else {
1023                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to select "
1024                         "authenticated key management type");
1025                 return -1;
1026         }
1027
1028         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_KEY_MGMT, wpa_s->key_mgmt);
1029         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PAIRWISE,
1030                          wpa_s->pairwise_cipher);
1031         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_GROUP, wpa_s->group_cipher);
1032
1033 #ifdef CONFIG_IEEE80211W
1034         sel = ie.mgmt_group_cipher;
1035         if (ssid->ieee80211w == NO_MGMT_FRAME_PROTECTION ||
1036             !(ie.capabilities & WPA_CAPABILITY_MFPC))
1037                 sel = 0;
1038         if (sel & WPA_CIPHER_AES_128_CMAC) {
1039                 wpa_s->mgmt_group_cipher = WPA_CIPHER_AES_128_CMAC;
1040                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: using MGMT group cipher "
1041                         "AES-128-CMAC");
1042         } else {
1043                 wpa_s->mgmt_group_cipher = 0;
1044                 wpa_dbg(wpa_s, MSG_DEBUG, "WPA: not using MGMT group cipher");
1045         }
1046         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MGMT_GROUP,
1047                          wpa_s->mgmt_group_cipher);
1048         wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_MFP, ssid->ieee80211w);
1049 #endif /* CONFIG_IEEE80211W */
1050
1051         if (wpa_sm_set_assoc_wpa_ie_default(wpa_s->wpa, wpa_ie, wpa_ie_len)) {
1052                 wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to generate WPA IE");
1053                 return -1;
1054         }
1055
1056         if (wpa_key_mgmt_wpa_psk(ssid->key_mgmt)) {
1057                 wpa_sm_set_pmk(wpa_s->wpa, ssid->psk, PMK_LEN);
1058 #ifndef CONFIG_NO_PBKDF2
1059                 if (bss && ssid->bssid_set && ssid->ssid_len == 0 &&
1060                     ssid->passphrase) {
1061                         u8 psk[PMK_LEN];
1062                         pbkdf2_sha1(ssid->passphrase, (char *) bss->ssid,
1063                                     bss->ssid_len, 4096, psk, PMK_LEN);
1064                         wpa_hexdump_key(MSG_MSGDUMP, "PSK (from passphrase)",
1065                                         psk, PMK_LEN);
1066                         wpa_sm_set_pmk(wpa_s->wpa, psk, PMK_LEN);
1067                 }
1068 #endif /* CONFIG_NO_PBKDF2 */
1069         } else
1070                 wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
1071
1072         return 0;
1073 }
1074
1075
1076 /**
1077  * wpa_supplicant_associate - Request association
1078  * @wpa_s: Pointer to wpa_supplicant data
1079  * @bss: Scan results for the selected BSS, or %NULL if not available
1080  * @ssid: Configuration data for the selected network
1081  *
1082  * This function is used to request %wpa_supplicant to associate with a BSS.
1083  */
1084 void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
1085                               struct wpa_bss *bss, struct wpa_ssid *ssid)
1086 {
1087         u8 wpa_ie[200];
1088         size_t wpa_ie_len;
1089         int use_crypt, ret, i, bssid_changed;
1090         int algs = WPA_AUTH_ALG_OPEN;
1091         enum wpa_cipher cipher_pairwise, cipher_group;
1092         struct wpa_driver_associate_params params;
1093         int wep_keys_set = 0;
1094         struct wpa_driver_capa capa;
1095         int assoc_failed = 0;
1096         struct wpa_ssid *old_ssid;
1097 #ifdef CONFIG_HT_OVERRIDES
1098         struct ieee80211_ht_capabilities htcaps;
1099         struct ieee80211_ht_capabilities htcaps_mask;
1100 #endif /* CONFIG_HT_OVERRIDES */
1101
1102 #ifdef CONFIG_IBSS_RSN
1103         ibss_rsn_deinit(wpa_s->ibss_rsn);
1104         wpa_s->ibss_rsn = NULL;
1105 #endif /* CONFIG_IBSS_RSN */
1106 #ifdef ANDROID_P2P
1107         int freq = 0;
1108 #endif
1109
1110         if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO ||
1111             ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
1112 #ifdef CONFIG_AP
1113                 if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_AP)) {
1114                         wpa_msg(wpa_s, MSG_INFO, "Driver does not support AP "
1115                                 "mode");
1116                         return;
1117                 }
1118                 wpa_supplicant_create_ap(wpa_s, ssid);
1119                 wpa_s->current_bss = bss;
1120 #else /* CONFIG_AP */
1121                 wpa_msg(wpa_s, MSG_ERROR, "AP mode support not included in "
1122                         "the build");
1123 #endif /* CONFIG_AP */
1124                 return;
1125         }
1126
1127 #ifdef CONFIG_TDLS
1128         if (bss)
1129                 wpa_tdls_ap_ies(wpa_s->wpa, (const u8 *) (bss + 1),
1130                                 bss->ie_len);
1131 #endif /* CONFIG_TDLS */
1132
1133         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1134             ssid->mode == IEEE80211_MODE_INFRA) {
1135                 sme_authenticate(wpa_s, bss, ssid);
1136                 return;
1137         }
1138
1139         os_memset(&params, 0, sizeof(params));
1140         wpa_s->reassociate = 0;
1141         if (bss && !wpas_driver_bss_selection(wpa_s)) {
1142 #ifdef CONFIG_IEEE80211R
1143                 const u8 *ie, *md = NULL;
1144 #endif /* CONFIG_IEEE80211R */
1145                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
1146                         " (SSID='%s' freq=%d MHz)", MAC2STR(bss->bssid),
1147                         wpa_ssid_txt(bss->ssid, bss->ssid_len), bss->freq);
1148                 bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
1149                 os_memset(wpa_s->bssid, 0, ETH_ALEN);
1150                 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
1151                 if (bssid_changed)
1152                         wpas_notify_bssid_changed(wpa_s);
1153 #ifdef CONFIG_IEEE80211R
1154                 ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
1155                 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
1156                         md = ie + 2;
1157                 wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
1158                 if (md) {
1159                         /* Prepare for the next transition */
1160                         wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
1161                 }
1162 #endif /* CONFIG_IEEE80211R */
1163 #ifdef CONFIG_WPS
1164         } else if ((ssid->ssid == NULL || ssid->ssid_len == 0) &&
1165                    wpa_s->conf->ap_scan == 2 &&
1166                    (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
1167                 /* Use ap_scan==1 style network selection to find the network
1168                  */
1169                 wpa_s->scan_req = 2;
1170                 wpa_s->reassociate = 1;
1171                 wpa_supplicant_req_scan(wpa_s, 0, 0);
1172                 return;
1173 #endif /* CONFIG_WPS */
1174         } else {
1175                 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with SSID '%s'",
1176                         wpa_ssid_txt(ssid->ssid, ssid->ssid_len));
1177                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1178         }
1179         wpa_supplicant_cancel_sched_scan(wpa_s);
1180         wpa_supplicant_cancel_scan(wpa_s);
1181
1182         /* Starting new association, so clear the possibly used WPA IE from the
1183          * previous association. */
1184         wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1185
1186 #ifdef IEEE8021X_EAPOL
1187         if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1188                 if (ssid->leap) {
1189                         if (ssid->non_leap == 0)
1190                                 algs = WPA_AUTH_ALG_LEAP;
1191                         else
1192                                 algs |= WPA_AUTH_ALG_LEAP;
1193                 }
1194         }
1195 #endif /* IEEE8021X_EAPOL */
1196         wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x", algs);
1197         if (ssid->auth_alg) {
1198                 algs = ssid->auth_alg;
1199                 wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
1200                         "0x%x", algs);
1201         }
1202
1203         if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
1204                     wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
1205             wpa_key_mgmt_wpa(ssid->key_mgmt)) {
1206                 int try_opportunistic;
1207                 try_opportunistic = ssid->proactive_key_caching &&
1208                         (ssid->proto & WPA_PROTO_RSN);
1209                 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
1210                                             wpa_s->current_ssid,
1211                                             try_opportunistic) == 0)
1212                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
1213                 wpa_ie_len = sizeof(wpa_ie);
1214                 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
1215                                               wpa_ie, &wpa_ie_len)) {
1216                         wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1217                                 "key management and encryption suites");
1218                         return;
1219                 }
1220         } else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
1221                 wpa_ie_len = sizeof(wpa_ie);
1222                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
1223                                               wpa_ie, &wpa_ie_len)) {
1224                         wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed to set WPA "
1225                                 "key management and encryption suites (no "
1226                                 "scan results)");
1227                         return;
1228                 }
1229 #ifdef CONFIG_WPS
1230         } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
1231                 struct wpabuf *wps_ie;
1232                 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
1233                 if (wps_ie && wpabuf_len(wps_ie) <= sizeof(wpa_ie)) {
1234                         wpa_ie_len = wpabuf_len(wps_ie);
1235                         os_memcpy(wpa_ie, wpabuf_head(wps_ie), wpa_ie_len);
1236                 } else
1237                         wpa_ie_len = 0;
1238                 wpabuf_free(wps_ie);
1239                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1240                 if (!bss || (bss->caps & IEEE80211_CAP_PRIVACY))
1241                         params.wps = WPS_MODE_PRIVACY;
1242                 else
1243                         params.wps = WPS_MODE_OPEN;
1244                 wpa_s->wpa_proto = 0;
1245 #endif /* CONFIG_WPS */
1246         } else {
1247                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
1248                 wpa_ie_len = 0;
1249                 wpa_s->wpa_proto = 0;
1250         }
1251
1252 #ifdef CONFIG_P2P
1253         if (wpa_s->global->p2p) {
1254                 u8 *pos;
1255                 size_t len;
1256                 int res;
1257                 int p2p_group;
1258                 p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
1259                 pos = wpa_ie + wpa_ie_len;
1260                 len = sizeof(wpa_ie) - wpa_ie_len;
1261                 res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
1262                 if (res >= 0)
1263                         wpa_ie_len += res;
1264         }
1265
1266         wpa_s->cross_connect_disallowed = 0;
1267         if (bss) {
1268                 struct wpabuf *p2p;
1269                 p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE);
1270                 if (p2p) {
1271                         wpa_s->cross_connect_disallowed =
1272                                 p2p_get_cross_connect_disallowed(p2p);
1273                         wpabuf_free(p2p);
1274                         wpa_dbg(wpa_s, MSG_DEBUG, "P2P: WLAN AP %s cross "
1275                                 "connection",
1276                                 wpa_s->cross_connect_disallowed ?
1277                                 "disallows" : "allows");
1278                 }
1279         }
1280 #endif /* CONFIG_P2P */
1281
1282 #ifdef CONFIG_INTERWORKING
1283         if (wpa_s->conf->interworking) {
1284                 u8 *pos = wpa_ie;
1285                 if (wpa_ie_len > 0 && pos[0] == WLAN_EID_RSN)
1286                         pos += 2 + pos[1];
1287                 os_memmove(pos + 6, pos, wpa_ie_len - (pos - wpa_ie));
1288                 wpa_ie_len += 6;
1289                 *pos++ = WLAN_EID_EXT_CAPAB;
1290                 *pos++ = 4;
1291                 *pos++ = 0x00;
1292                 *pos++ = 0x00;
1293                 *pos++ = 0x00;
1294                 *pos++ = 0x80; /* Bit 31 - Interworking */
1295         }
1296 #endif /* CONFIG_INTERWORKING */
1297
1298         wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
1299         use_crypt = 1;
1300         cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);
1301         cipher_group = cipher_suite2driver(wpa_s->group_cipher);
1302         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1303             wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1304                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE)
1305                         use_crypt = 0;
1306                 if (wpa_set_wep_keys(wpa_s, ssid)) {
1307                         use_crypt = 1;
1308                         wep_keys_set = 1;
1309                 }
1310         }
1311         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)
1312                 use_crypt = 0;
1313
1314 #ifdef IEEE8021X_EAPOL
1315         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
1316                 if ((ssid->eapol_flags &
1317                      (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
1318                       EAPOL_FLAG_REQUIRE_KEY_BROADCAST)) == 0 &&
1319                     !wep_keys_set) {
1320                         use_crypt = 0;
1321                 } else {
1322                         /* Assume that dynamic WEP-104 keys will be used and
1323                          * set cipher suites in order for drivers to expect
1324                          * encryption. */
1325                         cipher_pairwise = cipher_group = CIPHER_WEP104;
1326                 }
1327         }
1328 #endif /* IEEE8021X_EAPOL */
1329
1330         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1331                 /* Set the key before (and later after) association */
1332                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1333         }
1334
1335         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
1336         if (bss) {
1337                 params.ssid = bss->ssid;
1338                 params.ssid_len = bss->ssid_len;
1339                 if (!wpas_driver_bss_selection(wpa_s)) {
1340                         params.bssid = bss->bssid;
1341                         params.freq = bss->freq;
1342                 }
1343         } else {
1344                 params.ssid = ssid->ssid;
1345                 params.ssid_len = ssid->ssid_len;
1346         }
1347
1348         if (ssid->mode == WPAS_MODE_IBSS && ssid->bssid_set &&
1349             wpa_s->conf->ap_scan == 2) {
1350                 params.bssid = ssid->bssid;
1351                 params.fixed_bssid = 1;
1352         }
1353
1354         if (ssid->mode == WPAS_MODE_IBSS && ssid->frequency > 0 &&
1355             params.freq == 0)
1356                 params.freq = ssid->frequency; /* Initial channel for IBSS */
1357         params.wpa_ie = wpa_ie;
1358         params.wpa_ie_len = wpa_ie_len;
1359         params.pairwise_suite = cipher_pairwise;
1360         params.group_suite = cipher_group;
1361         params.key_mgmt_suite = key_mgmt2driver(wpa_s->key_mgmt);
1362         params.wpa_proto = wpa_s->wpa_proto;
1363         params.auth_alg = algs;
1364         params.mode = ssid->mode;
1365         for (i = 0; i < NUM_WEP_KEYS; i++) {
1366                 if (ssid->wep_key_len[i])
1367                         params.wep_key[i] = ssid->wep_key[i];
1368                 params.wep_key_len[i] = ssid->wep_key_len[i];
1369         }
1370         params.wep_tx_keyidx = ssid->wep_tx_keyidx;
1371
1372         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1373             (params.key_mgmt_suite == KEY_MGMT_PSK ||
1374              params.key_mgmt_suite == KEY_MGMT_FT_PSK)) {
1375                 params.passphrase = ssid->passphrase;
1376                 if (ssid->psk_set)
1377                         params.psk = ssid->psk;
1378         }
1379
1380         params.drop_unencrypted = use_crypt;
1381
1382 #ifdef CONFIG_IEEE80211W
1383         params.mgmt_frame_protection = ssid->ieee80211w;
1384         if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
1385                 const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1386                 struct wpa_ie_data ie;
1387                 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ie) == 0 &&
1388                     ie.capabilities &
1389                     (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
1390                         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Selected AP supports "
1391                                 "MFP: require MFP");
1392                         params.mgmt_frame_protection =
1393                                 MGMT_FRAME_PROTECTION_REQUIRED;
1394                 }
1395         }
1396 #endif /* CONFIG_IEEE80211W */
1397
1398         params.p2p = ssid->p2p_group;
1399
1400         if (wpa_s->parent->set_sta_uapsd)
1401                 params.uapsd = wpa_s->parent->sta_uapsd;
1402         else
1403                 params.uapsd = -1;
1404
1405 #ifdef CONFIG_HT_OVERRIDES
1406         os_memset(&htcaps, 0, sizeof(htcaps));
1407         os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
1408         params.htcaps = (u8 *) &htcaps;
1409         params.htcaps_mask = (u8 *) &htcaps_mask;
1410         wpa_supplicant_apply_ht_overrides(wpa_s, ssid, &params);
1411 #endif /* CONFIG_HT_OVERRIDES */
1412
1413 #ifdef ANDROID_P2P
1414         /* If multichannel concurrency is not supported, check for any frequency
1415          * conflict and take appropriate action.
1416          */
1417         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT) &&
1418                 ((freq = wpa_drv_shared_freq(wpa_s)) > 0) && (freq != params.freq)) {
1419                 wpa_printf(MSG_DEBUG, "Shared interface with conflicting frequency found (%d != %d)"
1420                                                                                                                                 , freq, params.freq);
1421                 if (wpas_p2p_handle_frequency_conflicts(wpa_s, params.freq) < 0) {
1422                         /* Handling conflicts failed. Disable the current connect req and
1423                          * notify the userspace to take appropriate action */
1424                         wpa_printf(MSG_DEBUG, "proiritize is not set. Notifying user space to handle the case");
1425                         wpa_supplicant_disable_network(wpa_s, ssid);
1426                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_FREQ_CONFLICT
1427                                 " id=%d", ssid->id);
1428                         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1429                         return;
1430                 }
1431         }
1432 #endif
1433         ret = wpa_drv_associate(wpa_s, &params);
1434         if (ret < 0) {
1435                 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
1436                         "failed");
1437                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SANE_ERROR_CODES) {
1438                         /*
1439                          * The driver is known to mean what is saying, so we
1440                          * can stop right here; the association will not
1441                          * succeed.
1442                          */
1443                         wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
1444                         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1445                         return;
1446                 }
1447                 /* try to continue anyway; new association will be tried again
1448                  * after timeout */
1449                 assoc_failed = 1;
1450         }
1451
1452         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1453                 /* Set the key after the association just in case association
1454                  * cleared the previously configured key. */
1455                 wpa_supplicant_set_wpa_none_key(wpa_s, ssid);
1456                 /* No need to timeout authentication since there is no key
1457                  * management. */
1458                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1459                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1460 #ifdef CONFIG_IBSS_RSN
1461         } else if (ssid->mode == WPAS_MODE_IBSS &&
1462                    wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1463                    wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE) {
1464                 /*
1465                  * RSN IBSS authentication is per-STA and we can disable the
1466                  * per-BSSID authentication.
1467                  */
1468                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1469 #endif /* CONFIG_IBSS_RSN */
1470         } else {
1471                 /* Timeout for IEEE 802.11 authentication and association */
1472                 int timeout = 60;
1473
1474                 if (assoc_failed) {
1475                         /* give IBSS a bit more time */
1476                         timeout = ssid->mode == WPAS_MODE_IBSS ? 10 : 5;
1477                 } else if (wpa_s->conf->ap_scan == 1) {
1478                         /* give IBSS a bit more time */
1479                         timeout = ssid->mode == WPAS_MODE_IBSS ? 20 : 10;
1480                 }
1481                 wpa_supplicant_req_auth_timeout(wpa_s, timeout, 0);
1482         }
1483
1484         if (wep_keys_set && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1485             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC) {
1486                 /* Set static WEP keys again */
1487                 wpa_set_wep_keys(wpa_s, ssid);
1488         }
1489
1490         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid) {
1491                 /*
1492                  * Do not allow EAP session resumption between different
1493                  * network configurations.
1494                  */
1495                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
1496         }
1497         old_ssid = wpa_s->current_ssid;
1498         wpa_s->current_ssid = ssid;
1499         wpa_s->current_bss = bss;
1500         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
1501         wpa_supplicant_initiate_eapol(wpa_s);
1502         if (old_ssid != wpa_s->current_ssid)
1503                 wpas_notify_network_changed(wpa_s);
1504 }
1505
1506
1507 static void wpa_supplicant_clear_connection(struct wpa_supplicant *wpa_s,
1508                                             const u8 *addr)
1509 {
1510         struct wpa_ssid *old_ssid;
1511
1512         wpa_clear_keys(wpa_s, addr);
1513         wpa_supplicant_mark_disassoc(wpa_s);
1514         old_ssid = wpa_s->current_ssid;
1515         wpa_s->current_ssid = NULL;
1516         wpa_s->current_bss = NULL;
1517         wpa_sm_set_config(wpa_s->wpa, NULL);
1518         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
1519         if (old_ssid != wpa_s->current_ssid)
1520                 wpas_notify_network_changed(wpa_s);
1521         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
1522 }
1523
1524
1525 /**
1526  * wpa_supplicant_disassociate - Disassociate the current connection
1527  * @wpa_s: Pointer to wpa_supplicant data
1528  * @reason_code: IEEE 802.11 reason code for the disassociate frame
1529  *
1530  * This function is used to request %wpa_supplicant to disassociate with the
1531  * current AP.
1532  */
1533 void wpa_supplicant_disassociate(struct wpa_supplicant *wpa_s,
1534                                  int reason_code)
1535 {
1536         u8 *addr = NULL;
1537
1538         if (!is_zero_ether_addr(wpa_s->bssid)) {
1539                 wpa_drv_disassociate(wpa_s, wpa_s->bssid, reason_code);
1540                 addr = wpa_s->bssid;
1541         }
1542
1543         wpa_supplicant_clear_connection(wpa_s, addr);
1544 }
1545
1546
1547 /**
1548  * wpa_supplicant_deauthenticate - Deauthenticate the current connection
1549  * @wpa_s: Pointer to wpa_supplicant data
1550  * @reason_code: IEEE 802.11 reason code for the deauthenticate frame
1551  *
1552  * This function is used to request %wpa_supplicant to deauthenticate from the
1553  * current AP.
1554  */
1555 void wpa_supplicant_deauthenticate(struct wpa_supplicant *wpa_s,
1556                                    int reason_code)
1557 {
1558         u8 *addr = NULL;
1559
1560         if (!is_zero_ether_addr(wpa_s->bssid)) {
1561                 wpa_drv_deauthenticate(wpa_s, wpa_s->bssid, reason_code);
1562                 addr = wpa_s->bssid;
1563         }
1564
1565         wpa_supplicant_clear_connection(wpa_s, addr);
1566 }
1567
1568
1569 /**
1570  * wpa_supplicant_enable_network - Mark a configured network as enabled
1571  * @wpa_s: wpa_supplicant structure for a network interface
1572  * @ssid: wpa_ssid structure for a configured network or %NULL
1573  *
1574  * Enables the specified network or all networks if no network specified.
1575  */
1576 void wpa_supplicant_enable_network(struct wpa_supplicant *wpa_s,
1577                                    struct wpa_ssid *ssid)
1578 {
1579         struct wpa_ssid *other_ssid;
1580         int was_disabled;
1581
1582         if (ssid == NULL) {
1583                 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1584                      other_ssid = other_ssid->next) {
1585                         if (other_ssid->disabled == 2)
1586                                 continue; /* do not change persistent P2P group
1587                                            * data */
1588                         if (other_ssid == wpa_s->current_ssid &&
1589                             other_ssid->disabled)
1590                                 wpa_s->reassociate = 1;
1591
1592                         was_disabled = other_ssid->disabled;
1593
1594                         other_ssid->disabled = 0;
1595
1596                         if (was_disabled != other_ssid->disabled)
1597                                 wpas_notify_network_enabled_changed(
1598                                         wpa_s, other_ssid);
1599                 }
1600                 if (wpa_s->reassociate)
1601                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1602         } else if (ssid->disabled && ssid->disabled != 2) {
1603                 if (wpa_s->current_ssid == NULL) {
1604                         /*
1605                          * Try to reassociate since there is no current
1606                          * configuration and a new network was made available.
1607                          */
1608                         wpa_s->reassociate = 1;
1609                         wpa_supplicant_req_scan(wpa_s, 0, 0);
1610                 }
1611
1612                 was_disabled = ssid->disabled;
1613
1614                 ssid->disabled = 0;
1615
1616                 if (was_disabled != ssid->disabled)
1617                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1618         }
1619 }
1620
1621
1622 /**
1623  * wpa_supplicant_disable_network - Mark a configured network as disabled
1624  * @wpa_s: wpa_supplicant structure for a network interface
1625  * @ssid: wpa_ssid structure for a configured network or %NULL
1626  *
1627  * Disables the specified network or all networks if no network specified.
1628  */
1629 void wpa_supplicant_disable_network(struct wpa_supplicant *wpa_s,
1630                                     struct wpa_ssid *ssid)
1631 {
1632         struct wpa_ssid *other_ssid;
1633         int was_disabled;
1634
1635         if (ssid == NULL) {
1636                 for (other_ssid = wpa_s->conf->ssid; other_ssid;
1637                      other_ssid = other_ssid->next) {
1638                         was_disabled = other_ssid->disabled;
1639                         if (was_disabled == 2)
1640                                 continue; /* do not change persistent P2P group
1641                                            * data */
1642
1643                         other_ssid->disabled = 1;
1644
1645                         if (was_disabled != other_ssid->disabled)
1646                                 wpas_notify_network_enabled_changed(
1647                                         wpa_s, other_ssid);
1648                 }
1649                 if (wpa_s->current_ssid)
1650                         wpa_supplicant_disassociate(
1651                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1652         } else if (ssid->disabled != 2) {
1653                 if (ssid == wpa_s->current_ssid)
1654                         wpa_supplicant_disassociate(
1655                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1656
1657                 was_disabled = ssid->disabled;
1658
1659                 ssid->disabled = 1;
1660
1661                 if (was_disabled != ssid->disabled)
1662                         wpas_notify_network_enabled_changed(wpa_s, ssid);
1663         }
1664 }
1665
1666
1667 /**
1668  * wpa_supplicant_select_network - Attempt association with a network
1669  * @wpa_s: wpa_supplicant structure for a network interface
1670  * @ssid: wpa_ssid structure for a configured network or %NULL for any network
1671  */
1672 void wpa_supplicant_select_network(struct wpa_supplicant *wpa_s,
1673                                    struct wpa_ssid *ssid)
1674 {
1675
1676         struct wpa_ssid *other_ssid;
1677         int disconnected = 0;
1678
1679         if (ssid && ssid != wpa_s->current_ssid && wpa_s->current_ssid) {
1680                 wpa_supplicant_disassociate(
1681                         wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1682                 disconnected = 1;
1683         }
1684
1685         /*
1686          * Mark all other networks disabled or mark all networks enabled if no
1687          * network specified.
1688          */
1689         for (other_ssid = wpa_s->conf->ssid; other_ssid;
1690              other_ssid = other_ssid->next) {
1691                 int was_disabled = other_ssid->disabled;
1692                 if (was_disabled == 2)
1693                         continue; /* do not change persistent P2P group data */
1694
1695                 other_ssid->disabled = ssid ? (ssid->id != other_ssid->id) : 0;
1696
1697                 if (was_disabled != other_ssid->disabled)
1698                         wpas_notify_network_enabled_changed(wpa_s, other_ssid);
1699         }
1700
1701         if (ssid && ssid == wpa_s->current_ssid && wpa_s->current_ssid) {
1702                 /* We are already associated with the selected network */
1703                 wpa_printf(MSG_DEBUG, "Already associated with the "
1704                            "selected network - do nothing");
1705                 return;
1706         }
1707
1708         if (ssid)
1709                 wpa_s->current_ssid = ssid;
1710         wpa_s->connect_without_scan = NULL;
1711         wpa_s->disconnected = 0;
1712         wpa_s->reassociate = 1;
1713         wpa_supplicant_req_scan(wpa_s, 0, disconnected ? 100000 : 0);
1714
1715         if (ssid)
1716                 wpas_notify_network_selected(wpa_s, ssid);
1717 }
1718
1719
1720 /**
1721  * wpa_supplicant_set_ap_scan - Set AP scan mode for interface
1722  * @wpa_s: wpa_supplicant structure for a network interface
1723  * @ap_scan: AP scan mode
1724  * Returns: 0 if succeed or -1 if ap_scan has an invalid value
1725  *
1726  */
1727 int wpa_supplicant_set_ap_scan(struct wpa_supplicant *wpa_s, int ap_scan)
1728 {
1729
1730         int old_ap_scan;
1731
1732         if (ap_scan < 0 || ap_scan > 2)
1733                 return -1;
1734
1735 #ifdef ANDROID
1736         if (ap_scan == 2 && ap_scan != wpa_s->conf->ap_scan &&
1737             wpa_s->wpa_state >= WPA_ASSOCIATING &&
1738             wpa_s->wpa_state < WPA_COMPLETED) {
1739                 wpa_printf(MSG_ERROR, "ap_scan = %d (%d) rejected while "
1740                            "associating", wpa_s->conf->ap_scan, ap_scan);
1741                 return 0;
1742         }
1743 #endif /* ANDROID */
1744
1745         old_ap_scan = wpa_s->conf->ap_scan;
1746         wpa_s->conf->ap_scan = ap_scan;
1747
1748         if (old_ap_scan != wpa_s->conf->ap_scan)
1749                 wpas_notify_ap_scan_changed(wpa_s);
1750
1751         return 0;
1752 }
1753
1754
1755 /**
1756  * wpa_supplicant_set_bss_expiration_age - Set BSS entry expiration age
1757  * @wpa_s: wpa_supplicant structure for a network interface
1758  * @expire_age: Expiration age in seconds
1759  * Returns: 0 if succeed or -1 if expire_age has an invalid value
1760  *
1761  */
1762 int wpa_supplicant_set_bss_expiration_age(struct wpa_supplicant *wpa_s,
1763                                           unsigned int bss_expire_age)
1764 {
1765         if (bss_expire_age < 10) {
1766                 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration age %u",
1767                         bss_expire_age);
1768                 return -1;
1769         }
1770         wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration age: %d sec",
1771                 bss_expire_age);
1772         wpa_s->conf->bss_expiration_age = bss_expire_age;
1773
1774         return 0;
1775 }
1776
1777
1778 /**
1779  * wpa_supplicant_set_bss_expiration_count - Set BSS entry expiration scan count
1780  * @wpa_s: wpa_supplicant structure for a network interface
1781  * @expire_count: number of scans after which an unseen BSS is reclaimed
1782  * Returns: 0 if succeed or -1 if expire_count has an invalid value
1783  *
1784  */
1785 int wpa_supplicant_set_bss_expiration_count(struct wpa_supplicant *wpa_s,
1786                                             unsigned int bss_expire_count)
1787 {
1788         if (bss_expire_count < 1) {
1789                 wpa_msg(wpa_s, MSG_ERROR, "Invalid bss expiration count %u",
1790                         bss_expire_count);
1791                 return -1;
1792         }
1793         wpa_msg(wpa_s, MSG_DEBUG, "Setting bss expiration scan count: %u",
1794                 bss_expire_count);
1795         wpa_s->conf->bss_expiration_scan_count = bss_expire_count;
1796
1797         return 0;
1798 }
1799
1800
1801 /**
1802  * wpa_supplicant_set_debug_params - Set global debug params
1803  * @global: wpa_global structure
1804  * @debug_level: debug level
1805  * @debug_timestamp: determines if show timestamp in debug data
1806  * @debug_show_keys: determines if show keys in debug data
1807  * Returns: 0 if succeed or -1 if debug_level has wrong value
1808  */
1809 int wpa_supplicant_set_debug_params(struct wpa_global *global, int debug_level,
1810                                     int debug_timestamp, int debug_show_keys)
1811 {
1812
1813         int old_level, old_timestamp, old_show_keys;
1814
1815         /* check for allowed debuglevels */
1816         if (debug_level != MSG_EXCESSIVE &&
1817             debug_level != MSG_MSGDUMP &&
1818             debug_level != MSG_DEBUG &&
1819             debug_level != MSG_INFO &&
1820             debug_level != MSG_WARNING &&
1821             debug_level != MSG_ERROR)
1822                 return -1;
1823
1824         old_level = wpa_debug_level;
1825         old_timestamp = wpa_debug_timestamp;
1826         old_show_keys = wpa_debug_show_keys;
1827
1828         wpa_debug_level = debug_level;
1829         wpa_debug_timestamp = debug_timestamp ? 1 : 0;
1830         wpa_debug_show_keys = debug_show_keys ? 1 : 0;
1831
1832         if (wpa_debug_level != old_level)
1833                 wpas_notify_debug_level_changed(global);
1834         if (wpa_debug_timestamp != old_timestamp)
1835                 wpas_notify_debug_timestamp_changed(global);
1836         if (wpa_debug_show_keys != old_show_keys)
1837                 wpas_notify_debug_show_keys_changed(global);
1838
1839         return 0;
1840 }
1841
1842
1843 /**
1844  * wpa_supplicant_get_ssid - Get a pointer to the current network structure
1845  * @wpa_s: Pointer to wpa_supplicant data
1846  * Returns: A pointer to the current network structure or %NULL on failure
1847  */
1848 struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
1849 {
1850         struct wpa_ssid *entry;
1851         u8 ssid[MAX_SSID_LEN];
1852         int res;
1853         size_t ssid_len;
1854         u8 bssid[ETH_ALEN];
1855         int wired;
1856
1857         res = wpa_drv_get_ssid(wpa_s, ssid);
1858         if (res < 0) {
1859                 wpa_msg(wpa_s, MSG_WARNING, "Could not read SSID from "
1860                         "driver");
1861                 return NULL;
1862         }
1863         ssid_len = res;
1864
1865         if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1866                 wpa_msg(wpa_s, MSG_WARNING, "Could not read BSSID from "
1867                         "driver");
1868                 return NULL;
1869         }
1870
1871         wired = wpa_s->conf->ap_scan == 0 &&
1872                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_WIRED);
1873
1874         entry = wpa_s->conf->ssid;
1875         while (entry) {
1876                 if (!entry->disabled &&
1877                     ((ssid_len == entry->ssid_len &&
1878                       os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) &&
1879                     (!entry->bssid_set ||
1880                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1881                         return entry;
1882 #ifdef CONFIG_WPS
1883                 if (!entry->disabled &&
1884                     (entry->key_mgmt & WPA_KEY_MGMT_WPS) &&
1885                     (entry->ssid == NULL || entry->ssid_len == 0) &&
1886                     (!entry->bssid_set ||
1887                      os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
1888                         return entry;
1889 #endif /* CONFIG_WPS */
1890
1891                 if (!entry->disabled && entry->bssid_set &&
1892                     entry->ssid_len == 0 &&
1893                     os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)
1894                         return entry;
1895
1896                 entry = entry->next;
1897         }
1898
1899         return NULL;
1900 }
1901
1902
1903 static int select_driver(struct wpa_supplicant *wpa_s, int i)
1904 {
1905         struct wpa_global *global = wpa_s->global;
1906
1907         if (wpa_drivers[i]->global_init && global->drv_priv[i] == NULL) {
1908                 global->drv_priv[i] = wpa_drivers[i]->global_init();
1909                 if (global->drv_priv[i] == NULL) {
1910                         wpa_printf(MSG_ERROR, "Failed to initialize driver "
1911                                    "'%s'", wpa_drivers[i]->name);
1912                         return -1;
1913                 }
1914         }
1915
1916         wpa_s->driver = wpa_drivers[i];
1917         wpa_s->global_drv_priv = global->drv_priv[i];
1918
1919         return 0;
1920 }
1921
1922
1923 static int wpa_supplicant_set_driver(struct wpa_supplicant *wpa_s,
1924                                      const char *name)
1925 {
1926         int i;
1927         size_t len;
1928         const char *pos, *driver = name;
1929
1930         if (wpa_s == NULL)
1931                 return -1;
1932
1933         if (wpa_drivers[0] == NULL) {
1934                 wpa_msg(wpa_s, MSG_ERROR, "No driver interfaces build into "
1935                         "wpa_supplicant");
1936                 return -1;
1937         }
1938
1939         if (name == NULL) {
1940                 /* default to first driver in the list */
1941                 return select_driver(wpa_s, 0);
1942         }
1943
1944         do {
1945                 pos = os_strchr(driver, ',');
1946                 if (pos)
1947                         len = pos - driver;
1948                 else
1949                         len = os_strlen(driver);
1950
1951                 for (i = 0; wpa_drivers[i]; i++) {
1952                         if (os_strlen(wpa_drivers[i]->name) == len &&
1953                             os_strncmp(driver, wpa_drivers[i]->name, len) ==
1954                             0) {
1955                                 /* First driver that succeeds wins */
1956                                 if (select_driver(wpa_s, i) == 0)
1957                                         return 0;
1958                         }
1959                 }
1960
1961                 driver = pos + 1;
1962         } while (pos);
1963
1964         wpa_msg(wpa_s, MSG_ERROR, "Unsupported driver '%s'", name);
1965         return -1;
1966 }
1967
1968
1969 /**
1970  * wpa_supplicant_rx_eapol - Deliver a received EAPOL frame to wpa_supplicant
1971  * @ctx: Context pointer (wpa_s); this is the ctx variable registered
1972  *      with struct wpa_driver_ops::init()
1973  * @src_addr: Source address of the EAPOL frame
1974  * @buf: EAPOL data starting from the EAPOL header (i.e., no Ethernet header)
1975  * @len: Length of the EAPOL data
1976  *
1977  * This function is called for each received EAPOL frame. Most driver
1978  * interfaces rely on more generic OS mechanism for receiving frames through
1979  * l2_packet, but if such a mechanism is not available, the driver wrapper may
1980  * take care of received EAPOL frames and deliver them to the core supplicant
1981  * code by calling this function.
1982  */
1983 void wpa_supplicant_rx_eapol(void *ctx, const u8 *src_addr,
1984                              const u8 *buf, size_t len)
1985 {
1986         struct wpa_supplicant *wpa_s = ctx;
1987
1988         wpa_dbg(wpa_s, MSG_DEBUG, "RX EAPOL from " MACSTR, MAC2STR(src_addr));
1989         wpa_hexdump(MSG_MSGDUMP, "RX EAPOL", buf, len);
1990
1991         if (wpa_s->wpa_state < WPA_ASSOCIATED) {
1992                 /*
1993                  * There is possible race condition between receiving the
1994                  * association event and the EAPOL frame since they are coming
1995                  * through different paths from the driver. In order to avoid
1996                  * issues in trying to process the EAPOL frame before receiving
1997                  * association information, lets queue it for processing until
1998                  * the association event is received.
1999                  */
2000                 wpa_dbg(wpa_s, MSG_DEBUG, "Not associated - Delay processing "
2001                         "of received EAPOL frame");
2002                 wpabuf_free(wpa_s->pending_eapol_rx);
2003                 wpa_s->pending_eapol_rx = wpabuf_alloc_copy(buf, len);
2004                 if (wpa_s->pending_eapol_rx) {
2005                         os_get_time(&wpa_s->pending_eapol_rx_time);
2006                         os_memcpy(wpa_s->pending_eapol_rx_src, src_addr,
2007                                   ETH_ALEN);
2008                 }
2009                 return;
2010         }
2011
2012 #ifdef CONFIG_AP
2013         if (wpa_s->ap_iface) {
2014                 wpa_supplicant_ap_rx_eapol(wpa_s, src_addr, buf, len);
2015                 return;
2016         }
2017 #endif /* CONFIG_AP */
2018
2019         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE) {
2020                 wpa_dbg(wpa_s, MSG_DEBUG, "Ignored received EAPOL frame since "
2021                         "no key management is configured");
2022                 return;
2023         }
2024
2025         if (wpa_s->eapol_received == 0 &&
2026             (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) ||
2027              !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) ||
2028              wpa_s->wpa_state != WPA_COMPLETED) &&
2029             (wpa_s->current_ssid == NULL ||
2030              wpa_s->current_ssid->mode != IEEE80211_MODE_IBSS)) {
2031                 /* Timeout for completing IEEE 802.1X and WPA authentication */
2032                 wpa_supplicant_req_auth_timeout(
2033                         wpa_s,
2034                         (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
2035                          wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA ||
2036                          wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) ?
2037                         70 : 10, 0);
2038         }
2039         wpa_s->eapol_received++;
2040
2041         if (wpa_s->countermeasures) {
2042                 wpa_msg(wpa_s, MSG_INFO, "WPA: Countermeasures - dropped "
2043                         "EAPOL packet");
2044                 return;
2045         }
2046
2047 #ifdef CONFIG_IBSS_RSN
2048         if (wpa_s->current_ssid &&
2049             wpa_s->current_ssid->mode == WPAS_MODE_IBSS) {
2050                 ibss_rsn_rx_eapol(wpa_s->ibss_rsn, src_addr, buf, len);
2051                 return;
2052         }
2053 #endif /* CONFIG_IBSS_RSN */
2054
2055         /* Source address of the incoming EAPOL frame could be compared to the
2056          * current BSSID. However, it is possible that a centralized
2057          * Authenticator could be using another MAC address than the BSSID of
2058          * an AP, so just allow any address to be used for now. The replies are
2059          * still sent to the current BSSID (if available), though. */
2060
2061         os_memcpy(wpa_s->last_eapol_src, src_addr, ETH_ALEN);
2062         if (!wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) &&
2063             eapol_sm_rx_eapol(wpa_s->eapol, src_addr, buf, len) > 0)
2064                 return;
2065         wpa_drv_poll(wpa_s);
2066         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE))
2067                 wpa_sm_rx_eapol(wpa_s->wpa, src_addr, buf, len);
2068         else if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
2069                 /*
2070                  * Set portValid = TRUE here since we are going to skip 4-way
2071                  * handshake processing which would normally set portValid. We
2072                  * need this to allow the EAPOL state machines to be completed
2073                  * without going through EAPOL-Key handshake.
2074                  */
2075                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
2076         }
2077 }
2078
2079
2080 int wpa_supplicant_update_mac_addr(struct wpa_supplicant *wpa_s)
2081 {
2082         if (wpa_s->driver->send_eapol) {
2083                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2084                 if (addr)
2085                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2086         } else if (!(wpa_s->drv_flags &
2087                      WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE)) {
2088                 l2_packet_deinit(wpa_s->l2);
2089                 wpa_s->l2 = l2_packet_init(wpa_s->ifname,
2090                                            wpa_drv_get_mac_addr(wpa_s),
2091                                            ETH_P_EAPOL,
2092                                            wpa_supplicant_rx_eapol, wpa_s, 0);
2093                 if (wpa_s->l2 == NULL)
2094                         return -1;
2095         } else {
2096                 const u8 *addr = wpa_drv_get_mac_addr(wpa_s);
2097                 if (addr)
2098                         os_memcpy(wpa_s->own_addr, addr, ETH_ALEN);
2099         }
2100
2101         if (wpa_s->l2 && l2_packet_get_own_addr(wpa_s->l2, wpa_s->own_addr)) {
2102                 wpa_msg(wpa_s, MSG_ERROR, "Failed to get own L2 address");
2103                 return -1;
2104         }
2105
2106         wpa_dbg(wpa_s, MSG_DEBUG, "Own MAC address: " MACSTR,
2107                 MAC2STR(wpa_s->own_addr));
2108         wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
2109
2110         return 0;
2111 }
2112
2113
2114 /**
2115  * wpa_supplicant_driver_init - Initialize driver interface parameters
2116  * @wpa_s: Pointer to wpa_supplicant data
2117  * Returns: 0 on success, -1 on failure
2118  *
2119  * This function is called to initialize driver interface parameters.
2120  * wpa_drv_init() must have been called before this function to initialize the
2121  * driver interface.
2122  */
2123 int wpa_supplicant_driver_init(struct wpa_supplicant *wpa_s)
2124 {
2125         static int interface_count = 0;
2126
2127         if (wpa_supplicant_update_mac_addr(wpa_s) < 0)
2128                 return -1;
2129
2130         if (wpa_s->bridge_ifname[0]) {
2131                 wpa_dbg(wpa_s, MSG_DEBUG, "Receiving packets from bridge "
2132                         "interface '%s'", wpa_s->bridge_ifname);
2133                 wpa_s->l2_br = l2_packet_init(wpa_s->bridge_ifname,
2134                                               wpa_s->own_addr,
2135                                               ETH_P_EAPOL,
2136                                               wpa_supplicant_rx_eapol, wpa_s,
2137                                               0);
2138                 if (wpa_s->l2_br == NULL) {
2139                         wpa_msg(wpa_s, MSG_ERROR, "Failed to open l2_packet "
2140                                 "connection for the bridge interface '%s'",
2141                                 wpa_s->bridge_ifname);
2142                         return -1;
2143                 }
2144         }
2145
2146         wpa_clear_keys(wpa_s, NULL);
2147
2148         /* Make sure that TKIP countermeasures are not left enabled (could
2149          * happen if wpa_supplicant is killed during countermeasures. */
2150         wpa_drv_set_countermeasures(wpa_s, 0);
2151
2152         wpa_dbg(wpa_s, MSG_DEBUG, "RSN: flushing PMKID list in the driver");
2153         wpa_drv_flush_pmkid(wpa_s);
2154
2155         wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
2156         wpa_s->prev_scan_wildcard = 0;
2157
2158         if (wpa_supplicant_enabled_networks(wpa_s->conf)) {
2159                 if (wpa_supplicant_delayed_sched_scan(wpa_s, interface_count,
2160                                                       100000))
2161                         wpa_supplicant_req_scan(wpa_s, interface_count,
2162                                                 100000);
2163                 interface_count++;
2164         } else
2165                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
2166
2167         return 0;
2168 }
2169
2170
2171 static int wpa_supplicant_daemon(const char *pid_file)
2172 {
2173         wpa_printf(MSG_DEBUG, "Daemonize..");
2174         return os_daemonize(pid_file);
2175 }
2176
2177
2178 static struct wpa_supplicant * wpa_supplicant_alloc(void)
2179 {
2180         struct wpa_supplicant *wpa_s;
2181
2182         wpa_s = os_zalloc(sizeof(*wpa_s));
2183         if (wpa_s == NULL)
2184                 return NULL;
2185         wpa_s->scan_req = 1;
2186         wpa_s->scan_interval = 5;
2187         wpa_s->new_connection = 1;
2188         wpa_s->parent = wpa_s;
2189         wpa_s->sched_scanning = 0;
2190
2191         return wpa_s;
2192 }
2193
2194
2195 #ifdef CONFIG_HT_OVERRIDES
2196
2197 static int wpa_set_htcap_mcs(struct wpa_supplicant *wpa_s,
2198                              struct ieee80211_ht_capabilities *htcaps,
2199                              struct ieee80211_ht_capabilities *htcaps_mask,
2200                              const char *ht_mcs)
2201 {
2202         /* parse ht_mcs into hex array */
2203         int i;
2204         const char *tmp = ht_mcs;
2205         char *end = NULL;
2206
2207         /* If ht_mcs is null, do not set anything */
2208         if (!ht_mcs)
2209                 return 0;
2210
2211         /* This is what we are setting in the kernel */
2212         os_memset(&htcaps->supported_mcs_set, 0, IEEE80211_HT_MCS_MASK_LEN);
2213
2214         wpa_msg(wpa_s, MSG_DEBUG, "set_htcap, ht_mcs -:%s:-", ht_mcs);
2215
2216         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
2217                 errno = 0;
2218                 long v = strtol(tmp, &end, 16);
2219                 if (errno == 0) {
2220                         wpa_msg(wpa_s, MSG_DEBUG,
2221                                 "htcap value[%i]: %ld end: %p  tmp: %p",
2222                                 i, v, end, tmp);
2223                         if (end == tmp)
2224                                 break;
2225
2226                         htcaps->supported_mcs_set[i] = v;
2227                         tmp = end;
2228                 } else {
2229                         wpa_msg(wpa_s, MSG_ERROR,
2230                                 "Failed to parse ht-mcs: %s, error: %s\n",
2231                                 ht_mcs, strerror(errno));
2232                         return -1;
2233                 }
2234         }
2235
2236         /*
2237          * If we were able to parse any values, then set mask for the MCS set.
2238          */
2239         if (i) {
2240                 os_memset(&htcaps_mask->supported_mcs_set, 0xff,
2241                           IEEE80211_HT_MCS_MASK_LEN - 1);
2242                 /* skip the 3 reserved bits */
2243                 htcaps_mask->supported_mcs_set[IEEE80211_HT_MCS_MASK_LEN - 1] =
2244                         0x1f;
2245         }
2246
2247         return 0;
2248 }
2249
2250
2251 static int wpa_disable_max_amsdu(struct wpa_supplicant *wpa_s,
2252                                  struct ieee80211_ht_capabilities *htcaps,
2253                                  struct ieee80211_ht_capabilities *htcaps_mask,
2254                                  int disabled)
2255 {
2256         u16 msk;
2257
2258         wpa_msg(wpa_s, MSG_DEBUG, "set_disable_max_amsdu: %d", disabled);
2259
2260         if (disabled == -1)
2261                 return 0;
2262
2263         msk = host_to_le16(HT_CAP_INFO_MAX_AMSDU_SIZE);
2264         htcaps_mask->ht_capabilities_info |= msk;
2265         if (disabled)
2266                 htcaps->ht_capabilities_info &= msk;
2267         else
2268                 htcaps->ht_capabilities_info |= msk;
2269
2270         return 0;
2271 }
2272
2273
2274 static int wpa_set_ampdu_factor(struct wpa_supplicant *wpa_s,
2275                                 struct ieee80211_ht_capabilities *htcaps,
2276                                 struct ieee80211_ht_capabilities *htcaps_mask,
2277                                 int factor)
2278 {
2279         wpa_msg(wpa_s, MSG_DEBUG, "set_ampdu_factor: %d", factor);
2280
2281         if (factor == -1)
2282                 return 0;
2283
2284         if (factor < 0 || factor > 3) {
2285                 wpa_msg(wpa_s, MSG_ERROR, "ampdu_factor: %d out of range. "
2286                         "Must be 0-3 or -1", factor);
2287                 return -EINVAL;
2288         }
2289
2290         htcaps_mask->a_mpdu_params |= 0x3; /* 2 bits for factor */
2291         htcaps->a_mpdu_params &= ~0x3;
2292         htcaps->a_mpdu_params |= factor & 0x3;
2293
2294         return 0;
2295 }
2296
2297
2298 static int wpa_set_ampdu_density(struct wpa_supplicant *wpa_s,
2299                                  struct ieee80211_ht_capabilities *htcaps,
2300                                  struct ieee80211_ht_capabilities *htcaps_mask,
2301                                  int density)
2302 {
2303         wpa_msg(wpa_s, MSG_DEBUG, "set_ampdu_density: %d", density);
2304
2305         if (density == -1)
2306                 return 0;
2307
2308         if (density < 0 || density > 7) {
2309                 wpa_msg(wpa_s, MSG_ERROR,
2310                         "ampdu_density: %d out of range. Must be 0-7 or -1.",
2311                         density);
2312                 return -EINVAL;
2313         }
2314
2315         htcaps_mask->a_mpdu_params |= 0x1C;
2316         htcaps->a_mpdu_params &= ~(0x1C);
2317         htcaps->a_mpdu_params |= (density << 2) & 0x1C;
2318
2319         return 0;
2320 }
2321
2322
2323 static int wpa_set_disable_ht40(struct wpa_supplicant *wpa_s,
2324                                 struct ieee80211_ht_capabilities *htcaps,
2325                                 struct ieee80211_ht_capabilities *htcaps_mask,
2326                                 int disabled)
2327 {
2328         /* Masking these out disables HT40 */
2329         u16 msk = host_to_le16(HT_CAP_INFO_SUPP_CHANNEL_WIDTH_SET |
2330                                HT_CAP_INFO_SHORT_GI40MHZ);
2331
2332         wpa_msg(wpa_s, MSG_DEBUG, "set_disable_ht40: %d", disabled);
2333
2334         if (disabled)
2335                 htcaps->ht_capabilities_info &= ~msk;
2336         else
2337                 htcaps->ht_capabilities_info |= msk;
2338
2339         htcaps_mask->ht_capabilities_info |= msk;
2340
2341         return 0;
2342 }
2343
2344
2345 void wpa_supplicant_apply_ht_overrides(
2346         struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
2347         struct wpa_driver_associate_params *params)
2348 {
2349         struct ieee80211_ht_capabilities *htcaps;
2350         struct ieee80211_ht_capabilities *htcaps_mask;
2351
2352         if (!ssid)
2353                 return;
2354
2355         params->disable_ht = ssid->disable_ht;
2356         if (!params->htcaps || !params->htcaps_mask)
2357                 return;
2358
2359         htcaps = (struct ieee80211_ht_capabilities *) params->htcaps;
2360         htcaps_mask = (struct ieee80211_ht_capabilities *) params->htcaps_mask;
2361         wpa_set_htcap_mcs(wpa_s, htcaps, htcaps_mask, ssid->ht_mcs);
2362         wpa_disable_max_amsdu(wpa_s, htcaps, htcaps_mask,
2363                               ssid->disable_max_amsdu);
2364         wpa_set_ampdu_factor(wpa_s, htcaps, htcaps_mask, ssid->ampdu_factor);
2365         wpa_set_ampdu_density(wpa_s, htcaps, htcaps_mask, ssid->ampdu_density);
2366         wpa_set_disable_ht40(wpa_s, htcaps, htcaps_mask, ssid->disable_ht40);
2367 }
2368
2369 #endif /* CONFIG_HT_OVERRIDES */
2370
2371
2372 static int wpa_supplicant_init_iface(struct wpa_supplicant *wpa_s,
2373                                      struct wpa_interface *iface)
2374 {
2375         const char *ifname, *driver;
2376         struct wpa_driver_capa capa;
2377
2378         wpa_printf(MSG_DEBUG, "Initializing interface '%s' conf '%s' driver "
2379                    "'%s' ctrl_interface '%s' bridge '%s'", iface->ifname,
2380                    iface->confname ? iface->confname : "N/A",
2381                    iface->driver ? iface->driver : "default",
2382                    iface->ctrl_interface ? iface->ctrl_interface : "N/A",
2383                    iface->bridge_ifname ? iface->bridge_ifname : "N/A");
2384
2385         if (iface->confname) {
2386 #ifdef CONFIG_BACKEND_FILE
2387                 wpa_s->confname = os_rel2abs_path(iface->confname);
2388                 if (wpa_s->confname == NULL) {
2389                         wpa_printf(MSG_ERROR, "Failed to get absolute path "
2390                                    "for configuration file '%s'.",
2391                                    iface->confname);
2392                         return -1;
2393                 }
2394                 wpa_printf(MSG_DEBUG, "Configuration file '%s' -> '%s'",
2395                            iface->confname, wpa_s->confname);
2396 #else /* CONFIG_BACKEND_FILE */
2397                 wpa_s->confname = os_strdup(iface->confname);
2398 #endif /* CONFIG_BACKEND_FILE */
2399                 wpa_s->conf = wpa_config_read(wpa_s->confname);
2400                 if (wpa_s->conf == NULL) {
2401                         wpa_printf(MSG_ERROR, "Failed to read or parse "
2402                                    "configuration '%s'.", wpa_s->confname);
2403                         return -1;
2404                 }
2405
2406                 /*
2407                  * Override ctrl_interface and driver_param if set on command
2408                  * line.
2409                  */
2410                 if (iface->ctrl_interface) {
2411                         os_free(wpa_s->conf->ctrl_interface);
2412                         wpa_s->conf->ctrl_interface =
2413                                 os_strdup(iface->ctrl_interface);
2414                 }
2415
2416                 if (iface->driver_param) {
2417                         os_free(wpa_s->conf->driver_param);
2418                         wpa_s->conf->driver_param =
2419                                 os_strdup(iface->driver_param);
2420                 }
2421         } else
2422                 wpa_s->conf = wpa_config_alloc_empty(iface->ctrl_interface,
2423                                                      iface->driver_param);
2424
2425         if (wpa_s->conf == NULL) {
2426                 wpa_printf(MSG_ERROR, "\nNo configuration found.");
2427                 return -1;
2428         }
2429
2430         if (iface->ifname == NULL) {
2431                 wpa_printf(MSG_ERROR, "\nInterface name is required.");
2432                 return -1;
2433         }
2434         if (os_strlen(iface->ifname) >= sizeof(wpa_s->ifname)) {
2435                 wpa_printf(MSG_ERROR, "\nToo long interface name '%s'.",
2436                            iface->ifname);
2437                 return -1;
2438         }
2439         os_strlcpy(wpa_s->ifname, iface->ifname, sizeof(wpa_s->ifname));
2440
2441         if (iface->bridge_ifname) {
2442                 if (os_strlen(iface->bridge_ifname) >=
2443                     sizeof(wpa_s->bridge_ifname)) {
2444                         wpa_printf(MSG_ERROR, "\nToo long bridge interface "
2445                                    "name '%s'.", iface->bridge_ifname);
2446                         return -1;
2447                 }
2448                 os_strlcpy(wpa_s->bridge_ifname, iface->bridge_ifname,
2449                            sizeof(wpa_s->bridge_ifname));
2450         }
2451
2452         /* RSNA Supplicant Key Management - INITIALIZE */
2453         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
2454         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
2455
2456         /* Initialize driver interface and register driver event handler before
2457          * L2 receive handler so that association events are processed before
2458          * EAPOL-Key packets if both become available for the same select()
2459          * call. */
2460         driver = iface->driver;
2461 next_driver:
2462         if (wpa_supplicant_set_driver(wpa_s, driver) < 0)
2463                 return -1;
2464
2465         wpa_s->drv_priv = wpa_drv_init(wpa_s, wpa_s->ifname);
2466         if (wpa_s->drv_priv == NULL) {
2467                 const char *pos;
2468                 pos = driver ? os_strchr(driver, ',') : NULL;
2469                 if (pos) {
2470                         wpa_dbg(wpa_s, MSG_DEBUG, "Failed to initialize "
2471                                 "driver interface - try next driver wrapper");
2472                         driver = pos + 1;
2473                         goto next_driver;
2474                 }
2475                 wpa_msg(wpa_s, MSG_ERROR, "Failed to initialize driver "
2476                         "interface");
2477                 return -1;
2478         }
2479         if (wpa_drv_set_param(wpa_s, wpa_s->conf->driver_param) < 0) {
2480                 wpa_msg(wpa_s, MSG_ERROR, "Driver interface rejected "
2481                         "driver_param '%s'", wpa_s->conf->driver_param);
2482                 return -1;
2483         }
2484
2485         ifname = wpa_drv_get_ifname(wpa_s);
2486         if (ifname && os_strcmp(ifname, wpa_s->ifname) != 0) {
2487                 wpa_dbg(wpa_s, MSG_DEBUG, "Driver interface replaced "
2488                         "interface name with '%s'", ifname);
2489                 os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
2490         }
2491
2492         if (wpa_supplicant_init_wpa(wpa_s) < 0)
2493                 return -1;
2494
2495         wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname,
2496                           wpa_s->bridge_ifname[0] ? wpa_s->bridge_ifname :
2497                           NULL);
2498         wpa_sm_set_fast_reauth(wpa_s->wpa, wpa_s->conf->fast_reauth);
2499
2500         if (wpa_s->conf->dot11RSNAConfigPMKLifetime &&
2501             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_LIFETIME,
2502                              wpa_s->conf->dot11RSNAConfigPMKLifetime)) {
2503                 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2504                         "dot11RSNAConfigPMKLifetime");
2505                 return -1;
2506         }
2507
2508         if (wpa_s->conf->dot11RSNAConfigPMKReauthThreshold &&
2509             wpa_sm_set_param(wpa_s->wpa, RSNA_PMK_REAUTH_THRESHOLD,
2510                              wpa_s->conf->dot11RSNAConfigPMKReauthThreshold)) {
2511                 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2512                         "dot11RSNAConfigPMKReauthThreshold");
2513                 return -1;
2514         }
2515
2516         if (wpa_s->conf->dot11RSNAConfigSATimeout &&
2517             wpa_sm_set_param(wpa_s->wpa, RSNA_SA_TIMEOUT,
2518                              wpa_s->conf->dot11RSNAConfigSATimeout)) {
2519                 wpa_msg(wpa_s, MSG_ERROR, "Invalid WPA parameter value for "
2520                         "dot11RSNAConfigSATimeout");
2521                 return -1;
2522         }
2523
2524         wpa_s->hw.modes = wpa_drv_get_hw_feature_data(wpa_s,
2525                                                       &wpa_s->hw.num_modes,
2526                                                       &wpa_s->hw.flags);
2527
2528         if (wpa_drv_get_capa(wpa_s, &capa) == 0) {
2529                 wpa_s->drv_capa_known = 1;
2530                 wpa_s->drv_flags = capa.flags;
2531                 wpa_s->probe_resp_offloads = capa.probe_resp_offloads;
2532                 wpa_s->max_scan_ssids = capa.max_scan_ssids;
2533                 wpa_s->max_sched_scan_ssids = capa.max_sched_scan_ssids;
2534                 wpa_s->sched_scan_supported = capa.sched_scan_supported;
2535                 wpa_s->max_match_sets = capa.max_match_sets;
2536                 wpa_s->max_remain_on_chan = capa.max_remain_on_chan;
2537                 wpa_s->max_stations = capa.max_stations;
2538         }
2539         if (wpa_s->max_remain_on_chan == 0)
2540                 wpa_s->max_remain_on_chan = 1000;
2541
2542         if (wpa_supplicant_driver_init(wpa_s) < 0)
2543                 return -1;
2544
2545 #ifdef CONFIG_TDLS
2546         if (wpa_tdls_init(wpa_s->wpa))
2547                 return -1;
2548 #endif /* CONFIG_TDLS */
2549
2550         if (wpa_s->conf->country[0] && wpa_s->conf->country[1] &&
2551             wpa_drv_set_country(wpa_s, wpa_s->conf->country)) {
2552                 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to set country");
2553                 return -1;
2554         }
2555
2556         if (wpas_wps_init(wpa_s))
2557                 return -1;
2558
2559         if (wpa_supplicant_init_eapol(wpa_s) < 0)
2560                 return -1;
2561         wpa_sm_set_eapol(wpa_s->wpa, wpa_s->eapol);
2562
2563         wpa_s->ctrl_iface = wpa_supplicant_ctrl_iface_init(wpa_s);
2564         if (wpa_s->ctrl_iface == NULL) {
2565                 wpa_printf(MSG_ERROR,
2566                            "Failed to initialize control interface '%s'.\n"
2567                            "You may have another wpa_supplicant process "
2568                            "already running or the file was\n"
2569                            "left by an unclean termination of wpa_supplicant "
2570                            "in which case you will need\n"
2571                            "to manually remove this file before starting "
2572                            "wpa_supplicant again.\n",
2573                            wpa_s->conf->ctrl_interface);
2574                 return -1;
2575         }
2576
2577         wpa_s->gas = gas_query_init(wpa_s);
2578         if (wpa_s->gas == NULL) {
2579                 wpa_printf(MSG_ERROR, "Failed to initialize GAS query");
2580                 return -1;
2581         }
2582
2583 #ifdef CONFIG_P2P
2584         if (wpas_p2p_init(wpa_s->global, wpa_s) < 0) {
2585                 wpa_msg(wpa_s, MSG_ERROR, "Failed to init P2P");
2586                 return -1;
2587         }
2588 #endif /* CONFIG_P2P */
2589
2590         if (wpa_bss_init(wpa_s) < 0)
2591                 return -1;
2592
2593         return 0;
2594 }
2595
2596
2597 static void wpa_supplicant_deinit_iface(struct wpa_supplicant *wpa_s,
2598                                         int notify, int terminate)
2599 {
2600         if (wpa_s->drv_priv) {
2601                 wpa_supplicant_deauthenticate(wpa_s,
2602                                               WLAN_REASON_DEAUTH_LEAVING);
2603
2604                 wpa_drv_set_countermeasures(wpa_s, 0);
2605                 wpa_clear_keys(wpa_s, NULL);
2606         }
2607
2608         wpa_supplicant_cleanup(wpa_s);
2609
2610         if (wpa_s->drv_priv)
2611                 wpa_drv_deinit(wpa_s);
2612
2613         if (notify)
2614                 wpas_notify_iface_removed(wpa_s);
2615
2616         if (terminate)
2617                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_TERMINATING);
2618
2619         if (wpa_s->ctrl_iface) {
2620                 wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
2621                 wpa_s->ctrl_iface = NULL;
2622         }
2623
2624         if (wpa_s->conf != NULL) {
2625                 wpa_config_free(wpa_s->conf);
2626                 wpa_s->conf = NULL;
2627         }
2628 }
2629
2630
2631 /**
2632  * wpa_supplicant_add_iface - Add a new network interface
2633  * @global: Pointer to global data from wpa_supplicant_init()
2634  * @iface: Interface configuration options
2635  * Returns: Pointer to the created interface or %NULL on failure
2636  *
2637  * This function is used to add new network interfaces for %wpa_supplicant.
2638  * This can be called before wpa_supplicant_run() to add interfaces before the
2639  * main event loop has been started. In addition, new interfaces can be added
2640  * dynamically while %wpa_supplicant is already running. This could happen,
2641  * e.g., when a hotplug network adapter is inserted.
2642  */
2643 struct wpa_supplicant * wpa_supplicant_add_iface(struct wpa_global *global,
2644                                                  struct wpa_interface *iface)
2645 {
2646         struct wpa_supplicant *wpa_s;
2647         struct wpa_interface t_iface;
2648         struct wpa_ssid *ssid;
2649
2650         if (global == NULL || iface == NULL)
2651                 return NULL;
2652
2653         wpa_s = wpa_supplicant_alloc();
2654         if (wpa_s == NULL)
2655                 return NULL;
2656
2657         wpa_s->global = global;
2658
2659         t_iface = *iface;
2660         if (global->params.override_driver) {
2661                 wpa_printf(MSG_DEBUG, "Override interface parameter: driver "
2662                            "('%s' -> '%s')",
2663                            iface->driver, global->params.override_driver);
2664                 t_iface.driver = global->params.override_driver;
2665         }
2666         if (global->params.override_ctrl_interface) {
2667                 wpa_printf(MSG_DEBUG, "Override interface parameter: "
2668                            "ctrl_interface ('%s' -> '%s')",
2669                            iface->ctrl_interface,
2670                            global->params.override_ctrl_interface);
2671                 t_iface.ctrl_interface =
2672                         global->params.override_ctrl_interface;
2673         }
2674         if (wpa_supplicant_init_iface(wpa_s, &t_iface)) {
2675                 wpa_printf(MSG_DEBUG, "Failed to add interface %s",
2676                            iface->ifname);
2677                 wpa_supplicant_deinit_iface(wpa_s, 0, 0);
2678                 os_free(wpa_s);
2679                 return NULL;
2680         }
2681
2682         /* Notify the control interfaces about new iface */
2683         if (wpas_notify_iface_added(wpa_s)) {
2684                 wpa_supplicant_deinit_iface(wpa_s, 1, 0);
2685                 os_free(wpa_s);
2686                 return NULL;
2687         }
2688
2689         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next)
2690                 wpas_notify_network_added(wpa_s, ssid);
2691
2692         wpa_s->next = global->ifaces;
2693         global->ifaces = wpa_s;
2694
2695         wpa_dbg(wpa_s, MSG_DEBUG, "Added interface %s", wpa_s->ifname);
2696
2697         return wpa_s;
2698 }
2699
2700
2701 /**
2702  * wpa_supplicant_remove_iface - Remove a network interface
2703  * @global: Pointer to global data from wpa_supplicant_init()
2704  * @wpa_s: Pointer to the network interface to be removed
2705  * Returns: 0 if interface was removed, -1 if interface was not found
2706  *
2707  * This function can be used to dynamically remove network interfaces from
2708  * %wpa_supplicant, e.g., when a hotplug network adapter is ejected. In
2709  * addition, this function is used to remove all remaining interfaces when
2710  * %wpa_supplicant is terminated.
2711  */
2712 int wpa_supplicant_remove_iface(struct wpa_global *global,
2713                                 struct wpa_supplicant *wpa_s,
2714                                 int terminate)
2715 {
2716         struct wpa_supplicant *prev;
2717
2718         /* Remove interface from the global list of interfaces */
2719         prev = global->ifaces;
2720         if (prev == wpa_s) {
2721                 global->ifaces = wpa_s->next;
2722         } else {
2723                 while (prev && prev->next != wpa_s)
2724                         prev = prev->next;
2725                 if (prev == NULL)
2726                         return -1;
2727                 prev->next = wpa_s->next;
2728         }
2729
2730         wpa_dbg(wpa_s, MSG_DEBUG, "Removing interface %s", wpa_s->ifname);
2731
2732         if (global->p2p_group_formation == wpa_s)
2733                 global->p2p_group_formation = NULL;
2734         wpa_supplicant_deinit_iface(wpa_s, 1, terminate);
2735         os_free(wpa_s);
2736
2737         return 0;
2738 }
2739
2740
2741 /**
2742  * wpa_supplicant_get_eap_mode - Get the current EAP mode
2743  * @wpa_s: Pointer to the network interface
2744  * Returns: Pointer to the eap mode or the string "UNKNOWN" if not found
2745  */
2746 const char * wpa_supplicant_get_eap_mode(struct wpa_supplicant *wpa_s)
2747 {
2748         const char *eapol_method;
2749
2750         if (wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) == 0 &&
2751             wpa_s->key_mgmt != WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
2752                 return "NO-EAP";
2753         }
2754
2755         eapol_method = eapol_sm_get_method_name(wpa_s->eapol);
2756         if (eapol_method == NULL)
2757                 return "UNKNOWN-EAP";
2758
2759         return eapol_method;
2760 }
2761
2762
2763 /**
2764  * wpa_supplicant_get_iface - Get a new network interface
2765  * @global: Pointer to global data from wpa_supplicant_init()
2766  * @ifname: Interface name
2767  * Returns: Pointer to the interface or %NULL if not found
2768  */
2769 struct wpa_supplicant * wpa_supplicant_get_iface(struct wpa_global *global,
2770                                                  const char *ifname)
2771 {
2772         struct wpa_supplicant *wpa_s;
2773
2774         for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
2775                 if (os_strcmp(wpa_s->ifname, ifname) == 0)
2776                         return wpa_s;
2777         }
2778         return NULL;
2779 }
2780
2781
2782 #ifndef CONFIG_NO_WPA_MSG
2783 static const char * wpa_supplicant_msg_ifname_cb(void *ctx)
2784 {
2785         struct wpa_supplicant *wpa_s = ctx;
2786         if (wpa_s == NULL)
2787                 return NULL;
2788         return wpa_s->ifname;
2789 }
2790 #endif /* CONFIG_NO_WPA_MSG */
2791
2792
2793 /**
2794  * wpa_supplicant_init - Initialize %wpa_supplicant
2795  * @params: Parameters for %wpa_supplicant
2796  * Returns: Pointer to global %wpa_supplicant data, or %NULL on failure
2797  *
2798  * This function is used to initialize %wpa_supplicant. After successful
2799  * initialization, the returned data pointer can be used to add and remove
2800  * network interfaces, and eventually, to deinitialize %wpa_supplicant.
2801  */
2802 struct wpa_global * wpa_supplicant_init(struct wpa_params *params)
2803 {
2804         struct wpa_global *global;
2805         int ret, i;
2806
2807         if (params == NULL)
2808                 return NULL;
2809
2810 #ifdef CONFIG_DRIVER_NDIS
2811         {
2812                 void driver_ndis_init_ops(void);
2813                 driver_ndis_init_ops();
2814         }
2815 #endif /* CONFIG_DRIVER_NDIS */
2816
2817 #ifndef CONFIG_NO_WPA_MSG
2818         wpa_msg_register_ifname_cb(wpa_supplicant_msg_ifname_cb);
2819 #endif /* CONFIG_NO_WPA_MSG */
2820
2821         wpa_debug_open_file(params->wpa_debug_file_path);
2822         if (params->wpa_debug_syslog)
2823                 wpa_debug_open_syslog();
2824
2825         ret = eap_register_methods();
2826         if (ret) {
2827                 wpa_printf(MSG_ERROR, "Failed to register EAP methods");
2828                 if (ret == -2)
2829                         wpa_printf(MSG_ERROR, "Two or more EAP methods used "
2830                                    "the same EAP type.");
2831                 return NULL;
2832         }
2833
2834         global = os_zalloc(sizeof(*global));
2835         if (global == NULL)
2836                 return NULL;
2837         dl_list_init(&global->p2p_srv_bonjour);
2838         dl_list_init(&global->p2p_srv_upnp);
2839         global->params.daemonize = params->daemonize;
2840         global->params.wait_for_monitor = params->wait_for_monitor;
2841         global->params.dbus_ctrl_interface = params->dbus_ctrl_interface;
2842         if (params->pid_file)
2843                 global->params.pid_file = os_strdup(params->pid_file);
2844         if (params->ctrl_interface)
2845                 global->params.ctrl_interface =
2846                         os_strdup(params->ctrl_interface);
2847         if (params->override_driver)
2848                 global->params.override_driver =
2849                         os_strdup(params->override_driver);
2850         if (params->override_ctrl_interface)
2851                 global->params.override_ctrl_interface =
2852                         os_strdup(params->override_ctrl_interface);
2853         wpa_debug_level = global->params.wpa_debug_level =
2854                 params->wpa_debug_level;
2855         wpa_debug_show_keys = global->params.wpa_debug_show_keys =
2856                 params->wpa_debug_show_keys;
2857         wpa_debug_timestamp = global->params.wpa_debug_timestamp =
2858                 params->wpa_debug_timestamp;
2859
2860         wpa_printf(MSG_DEBUG, "wpa_supplicant v" VERSION_STR);
2861
2862         if (eloop_init()) {
2863                 wpa_printf(MSG_ERROR, "Failed to initialize event loop");
2864                 wpa_supplicant_deinit(global);
2865                 return NULL;
2866         }
2867
2868         random_init(params->entropy_file);
2869
2870         global->ctrl_iface = wpa_supplicant_global_ctrl_iface_init(global);
2871         if (global->ctrl_iface == NULL) {
2872                 wpa_supplicant_deinit(global);
2873                 return NULL;
2874         }
2875
2876         if (wpas_notify_supplicant_initialized(global)) {
2877                 wpa_supplicant_deinit(global);
2878                 return NULL;
2879         }
2880
2881         for (i = 0; wpa_drivers[i]; i++)
2882                 global->drv_count++;
2883         if (global->drv_count == 0) {
2884                 wpa_printf(MSG_ERROR, "No drivers enabled");
2885                 wpa_supplicant_deinit(global);
2886                 return NULL;
2887         }
2888         global->drv_priv = os_zalloc(global->drv_count * sizeof(void *));
2889         if (global->drv_priv == NULL) {
2890                 wpa_supplicant_deinit(global);
2891                 return NULL;
2892         }
2893
2894         return global;
2895 }
2896
2897
2898 /**
2899  * wpa_supplicant_run - Run the %wpa_supplicant main event loop
2900  * @global: Pointer to global data from wpa_supplicant_init()
2901  * Returns: 0 after successful event loop run, -1 on failure
2902  *
2903  * This function starts the main event loop and continues running as long as
2904  * there are any remaining events. In most cases, this function is running as
2905  * long as the %wpa_supplicant process in still in use.
2906  */
2907 int wpa_supplicant_run(struct wpa_global *global)
2908 {
2909         struct wpa_supplicant *wpa_s;
2910
2911         if (global->params.daemonize &&
2912             wpa_supplicant_daemon(global->params.pid_file))
2913                 return -1;
2914
2915         if (global->params.wait_for_monitor) {
2916                 for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next)
2917                         if (wpa_s->ctrl_iface)
2918                                 wpa_supplicant_ctrl_iface_wait(
2919                                         wpa_s->ctrl_iface);
2920         }
2921
2922         eloop_register_signal_terminate(wpa_supplicant_terminate, global);
2923         eloop_register_signal_reconfig(wpa_supplicant_reconfig, global);
2924
2925         eloop_run();
2926
2927         return 0;
2928 }
2929
2930
2931 /**
2932  * wpa_supplicant_deinit - Deinitialize %wpa_supplicant
2933  * @global: Pointer to global data from wpa_supplicant_init()
2934  *
2935  * This function is called to deinitialize %wpa_supplicant and to free all
2936  * allocated resources. Remaining network interfaces will also be removed.
2937  */
2938 void wpa_supplicant_deinit(struct wpa_global *global)
2939 {
2940         int i;
2941
2942         if (global == NULL)
2943                 return;
2944
2945 #ifdef CONFIG_P2P
2946         wpas_p2p_deinit_global(global);
2947 #endif /* CONFIG_P2P */
2948
2949         while (global->ifaces)
2950                 wpa_supplicant_remove_iface(global, global->ifaces, 1);
2951
2952         if (global->ctrl_iface)
2953                 wpa_supplicant_global_ctrl_iface_deinit(global->ctrl_iface);
2954
2955         wpas_notify_supplicant_deinitialized(global);
2956
2957         eap_peer_unregister_methods();
2958 #ifdef CONFIG_AP
2959         eap_server_unregister_methods();
2960 #endif /* CONFIG_AP */
2961
2962         for (i = 0; wpa_drivers[i] && global->drv_priv; i++) {
2963                 if (!global->drv_priv[i])
2964                         continue;
2965                 wpa_drivers[i]->global_deinit(global->drv_priv[i]);
2966         }
2967         os_free(global->drv_priv);
2968
2969         random_deinit();
2970
2971         eloop_destroy();
2972
2973         if (global->params.pid_file) {
2974                 os_daemonize_terminate(global->params.pid_file);
2975                 os_free(global->params.pid_file);
2976         }
2977         os_free(global->params.ctrl_interface);
2978         os_free(global->params.override_driver);
2979         os_free(global->params.override_ctrl_interface);
2980
2981         os_free(global);
2982         wpa_debug_close_syslog();
2983         wpa_debug_close_file();
2984 }
2985
2986
2987 void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s)
2988 {
2989         if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) &&
2990             wpa_s->conf->country[0] && wpa_s->conf->country[1]) {
2991                 char country[3];
2992                 country[0] = wpa_s->conf->country[0];
2993                 country[1] = wpa_s->conf->country[1];
2994                 country[2] = '\0';
2995                 if (wpa_drv_set_country(wpa_s, country) < 0) {
2996                         wpa_printf(MSG_ERROR, "Failed to set country code "
2997                                    "'%s'", country);
2998                 }
2999         }
3000
3001 #ifdef CONFIG_WPS
3002         wpas_wps_update_config(wpa_s);
3003 #endif /* CONFIG_WPS */
3004
3005 #ifdef CONFIG_P2P
3006         wpas_p2p_update_config(wpa_s);
3007 #endif /* CONFIG_P2P */
3008
3009         wpa_s->conf->changed_parameters = 0;
3010 }
3011
3012
3013 static void add_freq(int *freqs, int *num_freqs, int freq)
3014 {
3015         int i;
3016
3017         for (i = 0; i < *num_freqs; i++) {
3018                 if (freqs[i] == freq)
3019                         return;
3020         }
3021
3022         freqs[*num_freqs] = freq;
3023         (*num_freqs)++;
3024 }
3025
3026
3027 static int * get_bss_freqs_in_ess(struct wpa_supplicant *wpa_s)
3028 {
3029         struct wpa_bss *bss, *cbss;
3030         const int max_freqs = 10;
3031         int *freqs;
3032         int num_freqs = 0;
3033
3034         freqs = os_zalloc(sizeof(int) * (max_freqs + 1));
3035         if (freqs == NULL)
3036                 return NULL;
3037
3038         cbss = wpa_s->current_bss;
3039
3040         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
3041                 if (bss == cbss)
3042                         continue;
3043                 if (bss->ssid_len == cbss->ssid_len &&
3044                     os_memcmp(bss->ssid, cbss->ssid, bss->ssid_len) == 0 &&
3045                     wpa_blacklist_get(wpa_s, bss->bssid) == NULL) {
3046                         add_freq(freqs, &num_freqs, bss->freq);
3047                         if (num_freqs == max_freqs)
3048                                 break;
3049                 }
3050         }
3051
3052         if (num_freqs == 0) {
3053                 os_free(freqs);
3054                 freqs = NULL;
3055         }
3056
3057         return freqs;
3058 }
3059
3060
3061 void wpas_connection_failed(struct wpa_supplicant *wpa_s, const u8 *bssid)
3062 {
3063         int timeout;
3064         int count;
3065         int *freqs = NULL;
3066
3067         /*
3068          * Remove possible authentication timeout since the connection failed.
3069          */
3070         eloop_cancel_timeout(wpa_supplicant_timeout, wpa_s, NULL);
3071
3072         /*
3073          * Add the failed BSSID into the blacklist and speed up next scan
3074          * attempt if there could be other APs that could accept association.
3075          * The current blacklist count indicates how many times we have tried
3076          * connecting to this AP and multiple attempts mean that other APs are
3077          * either not available or has already been tried, so that we can start
3078          * increasing the delay here to avoid constant scanning.
3079          */
3080         count = wpa_blacklist_add(wpa_s, bssid);
3081         if (count == 1 && wpa_s->current_bss) {
3082                 /*
3083                  * This BSS was not in the blacklist before. If there is
3084                  * another BSS available for the same ESS, we should try that
3085                  * next. Otherwise, we may as well try this one once more
3086                  * before allowing other, likely worse, ESSes to be considered.
3087                  */
3088                 freqs = get_bss_freqs_in_ess(wpa_s);
3089                 if (freqs) {
3090                         wpa_dbg(wpa_s, MSG_DEBUG, "Another BSS in this ESS "
3091                                 "has been seen; try it next");
3092                         wpa_blacklist_add(wpa_s, bssid);
3093                         /*
3094                          * On the next scan, go through only the known channels
3095                          * used in this ESS based on previous scans to speed up
3096                          * common load balancing use case.
3097                          */
3098                         os_free(wpa_s->next_scan_freqs);
3099                         wpa_s->next_scan_freqs = freqs;
3100                 }
3101         }
3102
3103         switch (count) {
3104         case 1:
3105                 timeout = 100;
3106                 break;
3107         case 2:
3108                 timeout = 500;
3109                 break;
3110         case 3:
3111                 timeout = 1000;
3112                 break;
3113         default:
3114                 timeout = 5000;
3115         }
3116
3117         /*
3118          * TODO: if more than one possible AP is available in scan results,
3119          * could try the other ones before requesting a new scan.
3120          */
3121         wpa_supplicant_req_scan(wpa_s, timeout / 1000,
3122                                 1000 * (timeout % 1000));
3123 }
3124
3125
3126 int wpas_driver_bss_selection(struct wpa_supplicant *wpa_s)
3127 {
3128         return wpa_s->conf->ap_scan == 2 ||
3129                 (wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION);
3130 }
3131
3132 #ifdef ANDROID_P2P
3133 int wpas_is_p2p_prioritized(struct wpa_supplicant *wpa_s)
3134 {
3135         if (wpa_s->global->conc_pref == WPA_CONC_PREF_P2P)
3136                 return 1;
3137         if (wpa_s->global->conc_pref == WPA_CONC_PREF_STA)
3138                 return 0;
3139
3140         /* IF conc_priority is not set, return -1 */
3141         return -1;
3142 }
3143 #endif