wpa_supplicant/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2010, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eapol_supp/eapol_supp_sm.h"
  19 #include "rsn_supp/wpa.h"
  20 #include "eloop.h"
  21 #include "config.h"
  22 #include "l2_packet/l2_packet.h"
  23 #include "wpa_supplicant_i.h"
  24 #include "driver_i.h"
  25 #include "pcsc_funcs.h"
  26 #include "rsn_supp/preauth.h"
  27 #include "rsn_supp/pmksa_cache.h"
  28 #include "common/wpa_ctrl.h"
  29 #include "eap_peer/eap.h"
  30 #include "notify.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "blacklist.h"
  33 #include "wpas_glue.h"
  34 #include "wps_supplicant.h"
  35 #include "ibss_rsn.h"
  36 #include "sme.h"
  37 #include "bgscan.h"
  38 #include "ap.h"
  39 #include "bss.h"
  40 #include "mlme.h"
  41
  42
  43 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  44 {
  45         struct wpa_ssid *ssid, *old_ssid;
  46
  47         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  48                 return 0;
  49
  50         wpa_printf(MSG_DEBUG, "Select network based on association "
  51                    "information");
  52         ssid = wpa_supplicant_get_ssid(wpa_s);
  53         if (ssid == NULL) {
  54                 wpa_printf(MSG_INFO, "No network configuration found for the "
  55                            "current AP");
  56                 return -1;
  57         }
  58
  59         if (ssid->disabled) {
  60                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  61                 return -1;
  62         }
  63
  64         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  65                    "AP");
  66         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  67                               WPA_KEY_MGMT_WPA_NONE |
  68                               WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
  69                               WPA_KEY_MGMT_PSK_SHA256 |
  70                               WPA_KEY_MGMT_IEEE8021X_SHA256)) {
  71                 u8 wpa_ie[80];
  72                 size_t wpa_ie_len = sizeof(wpa_ie);
  73                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  74                                           wpa_ie, &wpa_ie_len);
  75         } else {
  76                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  77         }
  78
  79         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  80                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  81         old_ssid = wpa_s->current_ssid;
  82         wpa_s->current_ssid = ssid;
  83         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  84         wpa_supplicant_initiate_eapol(wpa_s);
  85         if (old_ssid != wpa_s->current_ssid)
  86                 wpas_notify_network_changed(wpa_s);
  87
  88         return 0;
  89 }
  90
  91
  92 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  93                                                 void *sock_ctx)
  94 {
  95         struct wpa_supplicant *wpa_s = eloop_ctx;
  96
  97         if (wpa_s->countermeasures) {
  98                 wpa_s->countermeasures = 0;
  99                 wpa_drv_set_countermeasures(wpa_s, 0);
 100                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
 101                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 102         }
 103 }
 104
 105
 106 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 107 {
 108         int bssid_changed;
 109
 110         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 111         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 112         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 113         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 114         if (bssid_changed)
 115                 wpas_notify_bssid_changed(wpa_s);
 116
 117         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 118         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 119         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 120                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 121         wpa_s->ap_ies_from_associnfo = 0;
 122 }
 123
 124
 125 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 126 {
 127         struct wpa_ie_data ie;
 128         int pmksa_set = -1;
 129         size_t i;
 130
 131         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 132             ie.pmkid == NULL)
 133                 return;
 134
 135         for (i = 0; i < ie.num_pmkid; i++) {
 136                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 137                                                     ie.pmkid + i * PMKID_LEN,
 138                                                     NULL, NULL, 0);
 139                 if (pmksa_set == 0) {
 140                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 141                         break;
 142                 }
 143         }
 144
 145         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 146                    "cache", pmksa_set == 0 ? "" : "not ");
 147 }
 148
 149
 150 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 151                                                  union wpa_event_data *data)
 152 {
 153         if (data == NULL) {
 154                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 155                 return;
 156         }
 157         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 158                    " index=%d preauth=%d",
 159                    MAC2STR(data->pmkid_candidate.bssid),
 160                    data->pmkid_candidate.index,
 161                    data->pmkid_candidate.preauth);
 162
 163         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 164                             data->pmkid_candidate.index,
 165                             data->pmkid_candidate.preauth);
 166 }
 167
 168
 169 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 170 {
 171         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 172             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 173                 return 0;
 174
 175 #ifdef IEEE8021X_EAPOL
 176         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 177             wpa_s->current_ssid &&
 178             !(wpa_s->current_ssid->eapol_flags &
 179               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 180                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 181                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 182                  * plaintext or static WEP keys). */
 183                 return 0;
 184         }
 185 #endif /* IEEE8021X_EAPOL */
 186
 187         return 1;
 188 }
 189
 190
 191 /**
 192  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 193  * @wpa_s: pointer to wpa_supplicant data
 194  * @ssid: Configuration data for the network
 195  * Returns: 0 on success, -1 on failure
 196  *
 197  * This function is called when starting authentication with a network that is
 198  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 199  */
 200 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 201                               struct wpa_ssid *ssid)
 202 {
 203 #ifdef IEEE8021X_EAPOL
 204         int aka = 0, sim = 0, type;
 205
 206         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 207                 return 0;
 208
 209         if (ssid->eap.eap_methods == NULL) {
 210                 sim = 1;
 211                 aka = 1;
 212         } else {
 213                 struct eap_method_type *eap = ssid->eap.eap_methods;
 214                 while (eap->vendor != EAP_VENDOR_IETF ||
 215                        eap->method != EAP_TYPE_NONE) {
 216                         if (eap->vendor == EAP_VENDOR_IETF) {
 217                                 if (eap->method == EAP_TYPE_SIM)
 218                                         sim = 1;
 219                                 else if (eap->method == EAP_TYPE_AKA)
 220                                         aka = 1;
 221                         }
 222                         eap++;
 223                 }
 224         }
 225
 226         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 227                 sim = 0;
 228         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 229                 aka = 0;
 230
 231         if (!sim && !aka) {
 232                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 233                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 234                 return 0;
 235         }
 236
 237         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 238                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 239         if (sim && aka)
 240                 type = SCARD_TRY_BOTH;
 241         else if (aka)
 242                 type = SCARD_USIM_ONLY;
 243         else
 244                 type = SCARD_GSM_SIM_ONLY;
 245
 246         wpa_s->scard = scard_init(type);
 247         if (wpa_s->scard == NULL) {
 248                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 249                            "(pcsc-lite)");
 250                 return -1;
 251         }
 252         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 253         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 254 #endif /* IEEE8021X_EAPOL */
 255
 256         return 0;
 257 }
 258
 259
 260 #ifndef CONFIG_NO_SCAN_PROCESSING
 261 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 262                                         struct wpa_ssid *ssid)
 263 {
 264         int i, privacy = 0;
 265
 266         if (ssid->mixed_cell)
 267                 return 1;
 268
 269 #ifdef CONFIG_WPS
 270         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 271                 return 1;
 272 #endif /* CONFIG_WPS */
 273
 274         for (i = 0; i < NUM_WEP_KEYS; i++) {
 275                 if (ssid->wep_key_len[i]) {
 276                         privacy = 1;
 277                         break;
 278                 }
 279         }
 280 #ifdef IEEE8021X_EAPOL
 281         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 282             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 283                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 284                 privacy = 1;
 285 #endif /* IEEE8021X_EAPOL */
 286
 287         if (bss->caps & IEEE80211_CAP_PRIVACY)
 288                 return privacy;
 289         return !privacy;
 290 }
 291
 292
 293 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
 294                                          struct wpa_ssid *ssid,
 295                                          struct wpa_scan_res *bss)
 296 {
 297         struct wpa_ie_data ie;
 298         int proto_match = 0;
 299         const u8 *rsn_ie, *wpa_ie;
 300         int ret;
 301
 302         ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
 303         if (ret >= 0)
 304                 return ret;
 305
 306         rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 307         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 308                 proto_match++;
 309
 310                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 311                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 312                         break;
 313                 }
 314                 if (!(ie.proto & ssid->proto)) {
 315                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 316                                    "mismatch");
 317                         break;
 318                 }
 319
 320                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 321                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 322                                    "mismatch");
 323                         break;
 324                 }
 325
 326                 if (!(ie.group_cipher & ssid->group_cipher)) {
 327                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 328                                    "mismatch");
 329                         break;
 330                 }
 331
 332                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 333                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 334                                    "mismatch");
 335                         break;
 336                 }
 337
 338 #ifdef CONFIG_IEEE80211W
 339                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 340                     ssid->ieee80211w == IEEE80211W_REQUIRED) {
 341                         wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 342                                    "protection");
 343                         break;
 344                 }
 345 #endif /* CONFIG_IEEE80211W */
 346
 347                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 348                 return 1;
 349         }
 350
 351         wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 352         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 353                 proto_match++;
 354
 355                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 356                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 357                         break;
 358                 }
 359                 if (!(ie.proto & ssid->proto)) {
 360                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 361                                    "mismatch");
 362                         break;
 363                 }
 364
 365                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 366                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 367                                    "mismatch");
 368                         break;
 369                 }
 370
 371                 if (!(ie.group_cipher & ssid->group_cipher)) {
 372                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 373                                    "mismatch");
 374                         break;
 375                 }
 376
 377                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 378                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 379                                    "mismatch");
 380                         break;
 381                 }
 382
 383                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 384                 return 1;
 385         }
 386
 387         if (proto_match == 0)
 388                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 389
 390         return 0;
 391 }
 392
 393
 394 static struct wpa_bss *
 395 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
 396                               struct wpa_scan_results *scan_res,
 397                               struct wpa_ssid *group,
 398                               struct wpa_ssid **selected_ssid)
 399 {
 400         struct wpa_ssid *ssid;
 401         struct wpa_scan_res *bss;
 402         size_t i;
 403         struct wpa_blacklist *e;
 404         const u8 *ie;
 405
 406         wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 407         for (i = 0; i < scan_res->num; i++) {
 408                 const u8 *ssid_;
 409                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 410                 bss = scan_res->res[i];
 411
 412                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 413                 ssid_ = ie ? ie + 2 : (u8 *) "";
 414                 ssid_len = ie ? ie[1] : 0;
 415
 416                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 417                 wpa_ie_len = ie ? ie[1] : 0;
 418
 419                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 420                 rsn_ie_len = ie ? ie[1] : 0;
 421
 422                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 423                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 424                            (int) i, MAC2STR(bss->bssid),
 425                            wpa_ssid_txt(ssid_, ssid_len),
 426                            wpa_ie_len, rsn_ie_len, bss->caps);
 427
 428                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 429                 if (e && e->count > 1) {
 430                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 431                         continue;
 432                 }
 433
 434                 if (ssid_len == 0) {
 435                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 436                         continue;
 437                 }
 438
 439                 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
 440                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 441                         continue;
 442                 }
 443
 444                 for (ssid = group; ssid; ssid = ssid->pnext) {
 445                         int check_ssid = 1;
 446
 447                         if (ssid->disabled) {
 448                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 449                                 continue;
 450                         }
 451
 452 #ifdef CONFIG_WPS
 453                         if (ssid->ssid_len == 0 &&
 454                             wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 455                                 check_ssid = 0;
 456 #endif /* CONFIG_WPS */
 457
 458                         if (check_ssid &&
 459                             (ssid_len != ssid->ssid_len ||
 460                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 461                                 wpa_printf(MSG_DEBUG, "   skip - "
 462                                            "SSID mismatch");
 463                                 continue;
 464                         }
 465
 466                         if (ssid->bssid_set &&
 467                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 468                         {
 469                                 wpa_printf(MSG_DEBUG, "   skip - "
 470                                            "BSSID mismatch");
 471                                 continue;
 472                         }
 473
 474                         if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
 475                                 continue;
 476
 477                         wpa_printf(MSG_DEBUG, "   selected WPA AP "
 478                                    MACSTR " ssid='%s'",
 479                                    MAC2STR(bss->bssid),
 480                                    wpa_ssid_txt(ssid_, ssid_len));
 481                         *selected_ssid = ssid;
 482                         return wpa_bss_get(wpa_s, bss->bssid, ssid_, ssid_len);
 483                 }
 484         }
 485
 486         return NULL;
 487 }
 488
 489
 490 static struct wpa_bss *
 491 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
 492                                   struct wpa_scan_results *scan_res,
 493                                   struct wpa_ssid *group,
 494                                   struct wpa_ssid **selected_ssid)
 495 {
 496         struct wpa_ssid *ssid;
 497         struct wpa_scan_res *bss;
 498         size_t i;
 499         struct wpa_blacklist *e;
 500         const u8 *ie;
 501
 502         wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 503         for (i = 0; i < scan_res->num; i++) {
 504                 const u8 *ssid_;
 505                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 506                 bss = scan_res->res[i];
 507
 508                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 509                 ssid_ = ie ? ie + 2 : (u8 *) "";
 510                 ssid_len = ie ? ie[1] : 0;
 511
 512                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 513                 wpa_ie_len = ie ? ie[1] : 0;
 514
 515                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 516                 rsn_ie_len = ie ? ie[1] : 0;
 517
 518                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 519                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 520                            (int) i, MAC2STR(bss->bssid),
 521                            wpa_ssid_txt(ssid_, ssid_len),
 522                            wpa_ie_len, rsn_ie_len, bss->caps);
 523
 524                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 525                 if (e && e->count > 1) {
 526                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 527                         continue;
 528                 }
 529
 530                 if (ssid_len == 0) {
 531                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 532                         continue;
 533                 }
 534
 535                 for (ssid = group; ssid; ssid = ssid->pnext) {
 536                         int check_ssid = ssid->ssid_len != 0;
 537
 538                         if (ssid->disabled) {
 539                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 540                                 continue;
 541                         }
 542
 543 #ifdef CONFIG_WPS
 544                         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 545                                 /* Only allow wildcard SSID match if an AP
 546                                  * advertises active WPS operation that matches
 547                                  * with our mode. */
 548                                 check_ssid = 1;
 549                                 if (ssid->ssid_len == 0 &&
 550                                     wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
 551                                                               bss))
 552                                         check_ssid = 0;
 553                         }
 554 #endif /* CONFIG_WPS */
 555
 556                         if (check_ssid &&
 557                             (ssid_len != ssid->ssid_len ||
 558                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 559                                 wpa_printf(MSG_DEBUG, "   skip - "
 560                                            "SSID mismatch");
 561                                 continue;
 562                         }
 563
 564                         if (ssid->bssid_set &&
 565                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 566                         {
 567                                 wpa_printf(MSG_DEBUG, "   skip - "
 568                                            "BSSID mismatch");
 569                                 continue;
 570                         }
 571
 572                         if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 573                             !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
 574                             !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 575                         {
 576                                 wpa_printf(MSG_DEBUG, "   skip - "
 577                                            "non-WPA network not allowed");
 578                                 continue;
 579                         }
 580
 581                         if ((ssid->key_mgmt &
 582                              (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 583                               WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
 584                               WPA_KEY_MGMT_IEEE8021X_SHA256 |
 585                               WPA_KEY_MGMT_PSK_SHA256)) &&
 586                             (wpa_ie_len != 0 || rsn_ie_len != 0)) {
 587                                 wpa_printf(MSG_DEBUG, "   skip - "
 588                                            "WPA network");
 589                                 continue;
 590                         }
 591
 592                         if (!wpa_supplicant_match_privacy(bss, ssid)) {
 593                                 wpa_printf(MSG_DEBUG, "   skip - "
 594                                            "privacy mismatch");
 595                                 continue;
 596                         }
 597
 598                         if (bss->caps & IEEE80211_CAP_IBSS) {
 599                                 wpa_printf(MSG_DEBUG, "   skip - "
 600                                            "IBSS (adhoc) network");
 601                                 continue;
 602                         }
 603
 604                         wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 605                                    MACSTR " ssid='%s'",
 606                                    MAC2STR(bss->bssid),
 607                                    wpa_ssid_txt(ssid_, ssid_len));
 608                         *selected_ssid = ssid;
 609                         return wpa_bss_get(wpa_s, bss->bssid, ssid_, ssid_len);
 610                 }
 611         }
 612
 613         return NULL;
 614 }
 615
 616
 617 static struct wpa_bss *
 618 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
 619                           struct wpa_scan_results *scan_res,
 620                           struct wpa_ssid *group,
 621                           struct wpa_ssid **selected_ssid)
 622 {
 623         struct wpa_bss *selected;
 624
 625         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 626                    group->priority);
 627
 628         /* First, try to find WPA-enabled AP */
 629         selected = wpa_supplicant_select_bss_wpa(wpa_s, scan_res, group,
 630                                                  selected_ssid);
 631         if (selected)
 632                 return selected;
 633
 634         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 635          * allows this. */
 636         return wpa_supplicant_select_bss_non_wpa(wpa_s, scan_res, group,
 637                                                  selected_ssid);
 638 }
 639
 640
 641 static struct wpa_bss *
 642 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 643                             struct wpa_scan_results *scan_res,
 644                             struct wpa_ssid **selected_ssid)
 645 {
 646         struct wpa_bss *selected = NULL;
 647         int prio;
 648
 649         while (selected == NULL) {
 650                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 651                         selected = wpa_supplicant_select_bss(
 652                                 wpa_s, scan_res, wpa_s->conf->pssid[prio],
 653                                 selected_ssid);
 654                         if (selected)
 655                                 break;
 656                 }
 657
 658                 if (selected == NULL && wpa_s->blacklist) {
 659                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 660                                    "and try again");
 661                         wpa_blacklist_clear(wpa_s);
 662                         wpa_s->blacklist_cleared++;
 663                 } else if (selected == NULL)
 664                         break;
 665         }
 666
 667         return selected;
 668 }
 669
 670
 671 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
 672                                         int timeout)
 673 {
 674         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 675                 /*
 676                  * Quick recovery if the initial scan results were not
 677                  * complete when fetched before the first scan request.
 678                  */
 679                 wpa_s->scan_res_tried++;
 680                 timeout = 0;
 681         } else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
 682                 /*
 683                  * No networks are enabled; short-circuit request so
 684                  * we don't wait timeout seconds before transitioning
 685                  * to INACTIVE state.
 686                  */
 687                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
 688                 return;
 689         }
 690         wpa_supplicant_req_scan(wpa_s, timeout, 0);
 691 }
 692
 693
 694 static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 695                                    struct wpa_bss *selected,
 696                                    struct wpa_ssid *ssid)
 697 {
 698         if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
 699                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
 700                         "PBC session overlap");
 701                 wpa_supplicant_req_new_scan(wpa_s, 10);
 702                 return;
 703         }
 704
 705         /*
 706          * Do not trigger new association unless the BSSID has changed or if
 707          * reassociation is requested. If we are in process of associating with
 708          * the selected BSSID, do not trigger new attempt.
 709          */
 710         if (wpa_s->reassociate ||
 711             (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 712              (wpa_s->wpa_state != WPA_ASSOCIATING ||
 713               os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
 714               0))) {
 715                 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 716                         wpa_supplicant_req_new_scan(wpa_s, 10);
 717                         return;
 718                 }
 719                 wpa_supplicant_associate(wpa_s, selected, ssid);
 720         } else {
 721                 wpa_printf(MSG_DEBUG, "Already associated with the selected "
 722                            "AP");
 723         }
 724 }
 725
 726
 727 static struct wpa_ssid *
 728 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
 729 {
 730         int prio;
 731         struct wpa_ssid *ssid;
 732
 733         for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 734                 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
 735                 {
 736                         if (ssid->disabled)
 737                                 continue;
 738                         if (ssid->mode == IEEE80211_MODE_IBSS ||
 739                             ssid->mode == IEEE80211_MODE_AP)
 740                                 return ssid;
 741                 }
 742         }
 743         return NULL;
 744 }
 745
 746
 747 /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
 748  * on BSS added and BSS changed events */
 749 static void wpa_supplicant_rsn_preauth_scan_results(
 750         struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res)
 751 {
 752         int i;
 753
 754         if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
 755                 return;
 756
 757         for (i = scan_res->num - 1; i >= 0; i--) {
 758                 const u8 *ssid, *rsn;
 759                 struct wpa_scan_res *r;
 760
 761                 r = scan_res->res[i];
 762
 763                 ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
 764                 if (ssid == NULL)
 765                         continue;
 766
 767                 rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
 768                 if (rsn == NULL)
 769                         continue;
 770
 771                 rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
 772         }
 773
 774 }
 775
 776
 777 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 778                                               union wpa_event_data *data)
 779 {
 780         struct wpa_bss *selected;
 781         struct wpa_ssid *ssid = NULL;
 782         struct wpa_scan_results *scan_res;
 783
 784         wpa_supplicant_notify_scanning(wpa_s, 0);
 785
 786         scan_res = wpa_supplicant_get_scan_results(wpa_s,
 787                                                    data ? &data->scan_info :
 788                                                    NULL, 1);
 789         if (scan_res == NULL) {
 790                 if (wpa_s->conf->ap_scan == 2)
 791                         return;
 792                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 793                            "scanning again");
 794                 wpa_supplicant_req_new_scan(wpa_s, 1);
 795                 return;
 796         }
 797
 798         /*
 799          * Don't post the results if this was the initial cached
 800          * and there were no results.
 801          */
 802         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
 803             scan_res->num == 0) {
 804                 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
 805                         "empty - not posting");
 806         } else {
 807                 wpa_printf(MSG_DEBUG, "New scan results available");
 808                 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
 809                 wpas_notify_scan_results(wpa_s);
 810         }
 811
 812         wpas_notify_scan_done(wpa_s, 1);
 813
 814         if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
 815                 wpa_scan_results_free(scan_res);
 816                 return;
 817         }
 818
 819         if (wpa_s->disconnected) {
 820                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 821                 wpa_scan_results_free(scan_res);
 822                 return;
 823         }
 824
 825         if (bgscan_notify_scan(wpa_s) == 1) {
 826                 wpa_scan_results_free(scan_res);
 827                 return;
 828         }
 829
 830         wpa_supplicant_rsn_preauth_scan_results(wpa_s, scan_res);
 831
 832         selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
 833         wpa_scan_results_free(scan_res);
 834
 835         if (selected) {
 836                 wpa_supplicant_connect(wpa_s, selected, ssid);
 837         } else {
 838                 wpa_printf(MSG_DEBUG, "No suitable network found");
 839                 ssid = wpa_supplicant_pick_new_network(wpa_s);
 840                 if (ssid) {
 841                         wpa_printf(MSG_DEBUG, "Setup a new network");
 842                         wpa_supplicant_associate(wpa_s, NULL, ssid);
 843                 } else
 844                         wpa_supplicant_req_new_scan(wpa_s, 5);
 845         }
 846 }
 847 #endif /* CONFIG_NO_SCAN_PROCESSING */
 848
 849
 850 #ifdef CONFIG_IEEE80211R
 851 static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
 852                                     const u8 *ftie, const u8 *mdie)
 853 {
 854         const u8 *mobility_domain = NULL;
 855         const u8 *r0kh_id = NULL;
 856         size_t r0kh_id_len = 0;
 857         const u8 *r1kh_id = NULL;
 858         struct rsn_ftie *hdr;
 859         const u8 *pos, *end;
 860
 861         if (mdie == NULL || ftie == NULL)
 862                 return;
 863
 864         if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
 865                 mobility_domain = mdie + 2;
 866 #ifdef CONFIG_SME
 867                 wpa_s->sme.ft_used = 1;
 868                 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
 869 #endif /* CONFIG_SME */
 870         }
 871         if (ftie[1] >= sizeof(struct rsn_ftie)) {
 872                 end = ftie + 2 + ftie[1];
 873                 hdr = (struct rsn_ftie *) (ftie + 2);
 874                 pos = (const u8 *) (hdr + 1);
 875                 while (pos + 1 < end) {
 876                         if (pos + 2 + pos[1] > end)
 877                                 break;
 878                         if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
 879                             pos[1] == FT_R1KH_ID_LEN)
 880                                 r1kh_id = pos + 2;
 881                         else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
 882                                  pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
 883                                 r0kh_id = pos + 2;
 884                                 r0kh_id_len = pos[1];
 885                         }
 886                         pos += 2 + pos[1];
 887                 }
 888         }
 889         wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
 890                              r0kh_id_len, r1kh_id);
 891 }
 892 #endif /* CONFIG_IEEE80211R */
 893
 894 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 895                                            union wpa_event_data *data)
 896 {
 897         int l, len, found = 0, wpa_found, rsn_found;
 898         const u8 *p;
 899 #ifdef CONFIG_IEEE80211R
 900         const u8 *mdie = NULL, *ftie = NULL;
 901 #endif /* CONFIG_IEEE80211R */
 902
 903         wpa_printf(MSG_DEBUG, "Association info event");
 904         if (data->assoc_info.req_ies)
 905                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 906                             data->assoc_info.req_ies_len);
 907         if (data->assoc_info.resp_ies)
 908                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 909                             data->assoc_info.resp_ies_len);
 910         if (data->assoc_info.beacon_ies)
 911                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 912                             data->assoc_info.beacon_ies,
 913                             data->assoc_info.beacon_ies_len);
 914         if (data->assoc_info.freq)
 915                 wpa_printf(MSG_DEBUG, "freq=%u MHz", data->assoc_info.freq);
 916
 917         p = data->assoc_info.req_ies;
 918         l = data->assoc_info.req_ies_len;
 919
 920         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 921         while (p && l >= 2) {
 922                 len = p[1] + 2;
 923                 if (len > l) {
 924                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 925                                     p, l);
 926                         break;
 927                 }
 928                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 929                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 930                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
 931                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 932                                 break;
 933                         found = 1;
 934                         wpa_find_assoc_pmkid(wpa_s);
 935                         break;
 936                 }
 937                 l -= len;
 938                 p += len;
 939         }
 940         if (!found && data->assoc_info.req_ies)
 941                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 942
 943 #ifdef CONFIG_IEEE80211R
 944         p = data->assoc_info.resp_ies;
 945         l = data->assoc_info.resp_ies_len;
 946
 947         /* Go through the IEs and make a copy of the FT/MD IE, if present. */
 948         while (p && l >= 2) {
 949                 len = p[1] + 2;
 950                 if (len > l) {
 951                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 952                                     p, l);
 953                         break;
 954                 }
 955                 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
 956                         ftie = p;
 957                 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
 958                         mdie = p;
 959                 l -= len;
 960                 p += len;
 961         }
 962
 963         wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
 964 #endif /* CONFIG_IEEE80211R */
 965
 966         /* WPA/RSN IE from Beacon/ProbeResp */
 967         p = data->assoc_info.beacon_ies;
 968         l = data->assoc_info.beacon_ies_len;
 969
 970         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 971          */
 972         wpa_found = rsn_found = 0;
 973         while (p && l >= 2) {
 974                 len = p[1] + 2;
 975                 if (len > l) {
 976                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 977                                     p, l);
 978                         break;
 979                 }
 980                 if (!wpa_found &&
 981                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 982                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 983                         wpa_found = 1;
 984                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 985                 }
 986
 987                 if (!rsn_found &&
 988                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
 989                         rsn_found = 1;
 990                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 991                 }
 992
 993                 l -= len;
 994                 p += len;
 995         }
 996
 997         if (!wpa_found && data->assoc_info.beacon_ies)
 998                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 999         if (!rsn_found && data->assoc_info.beacon_ies)
1000                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
1001         if (wpa_found || rsn_found)
1002                 wpa_s->ap_ies_from_associnfo = 1;
1003
1004         wpa_s->assoc_freq = data->assoc_info.freq;
1005 }
1006
1007
1008 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
1009                                        union wpa_event_data *data)
1010 {
1011         u8 bssid[ETH_ALEN];
1012         int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
1013         int bssid_changed;
1014         struct wpa_driver_capa capa;
1015
1016         if (data)
1017                 wpa_supplicant_event_associnfo(wpa_s, data);
1018
1019         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
1020         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1021                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1022         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
1023             (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
1024              os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
1025                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
1026                         MACSTR, MAC2STR(bssid));
1027                 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1028                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1029                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1030                 if (bssid_changed)
1031                         wpas_notify_bssid_changed(wpa_s);
1032
1033                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1034                         wpa_clear_keys(wpa_s, bssid);
1035                 }
1036                 if (wpa_supplicant_select_config(wpa_s) < 0) {
1037                         wpa_supplicant_disassociate(
1038                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1039                         return;
1040                 }
1041                 if (wpa_s->current_ssid) {
1042                         struct wpa_bss *bss = NULL;
1043                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1044                         if (ssid->ssid_len > 0)
1045                                 bss = wpa_bss_get(wpa_s, bssid,
1046                                                   ssid->ssid, ssid->ssid_len);
1047                         if (!bss)
1048                                 bss = wpa_bss_get_bssid(wpa_s, bssid);
1049                         if (bss)
1050                                 wpa_s->current_bss = bss;
1051                 }
1052         }
1053
1054 #ifdef CONFIG_SME
1055         os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1056         wpa_s->sme.prev_bssid_set = 1;
1057 #endif /* CONFIG_SME */
1058
1059         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1060         if (wpa_s->current_ssid) {
1061                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1062                  * initialized before association, but for other modes,
1063                  * initialize PC/SC here, if the current configuration needs
1064                  * smartcard or SIM/USIM. */
1065                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1066         }
1067         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1068         l2_packet_notify_auth_start(wpa_s->l2);
1069
1070         /*
1071          * Set portEnabled first to FALSE in order to get EAP state machine out
1072          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1073          * state machine may transit to AUTHENTICATING state based on obsolete
1074          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1075          * AUTHENTICATED without ever giving chance to EAP state machine to
1076          * reset the state.
1077          */
1078         if (!ft_completed) {
1079                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1080                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1081         }
1082         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1083                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1084         /* 802.1X::portControl = Auto */
1085         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1086         wpa_s->eapol_received = 0;
1087         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1088             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1089             (wpa_s->current_ssid &&
1090              wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1091                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1092                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1093         } else if (!ft_completed) {
1094                 /* Timeout for receiving the first EAPOL packet */
1095                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1096         }
1097         wpa_supplicant_cancel_scan(wpa_s);
1098
1099         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1100             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1101                 /*
1102                  * We are done; the driver will take care of RSN 4-way
1103                  * handshake.
1104                  */
1105                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1106                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1107                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1108                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1109         }
1110
1111         if (wpa_s->pending_eapol_rx) {
1112                 struct os_time now, age;
1113                 os_get_time(&now);
1114                 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1115                 if (age.sec == 0 && age.usec < 100000 &&
1116                     os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1117                     0) {
1118                         wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1119                                    "that was received just before association "
1120                                    "notification");
1121                         wpa_supplicant_rx_eapol(
1122                                 wpa_s, wpa_s->pending_eapol_rx_src,
1123                                 wpabuf_head(wpa_s->pending_eapol_rx),
1124                                 wpabuf_len(wpa_s->pending_eapol_rx));
1125                 }
1126                 wpabuf_free(wpa_s->pending_eapol_rx);
1127                 wpa_s->pending_eapol_rx = NULL;
1128         }
1129
1130 #ifdef CONFIG_BGSCAN
1131         if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1132                 bgscan_deinit(wpa_s);
1133                 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1134                         if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1135                                 wpa_printf(MSG_DEBUG, "Failed to initialize "
1136                                            "bgscan");
1137                                 /*
1138                                  * Live without bgscan; it is only used as a
1139                                  * roaming optimization, so the initial
1140                                  * connection is not affected.
1141                                  */
1142                         } else
1143                                 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1144                 } else
1145                         wpa_s->bgscan_ssid = NULL;
1146         }
1147 #endif /* CONFIG_BGSCAN */
1148
1149         if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1150              wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1151             wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1152             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1153                 /* Set static WEP keys again */
1154                 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1155         }
1156 }
1157
1158
1159 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1160 {
1161         const u8 *bssid;
1162 #ifdef CONFIG_SME
1163         int authenticating;
1164         u8 prev_pending_bssid[ETH_ALEN];
1165
1166         authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1167         os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1168 #endif /* CONFIG_SME */
1169
1170         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1171                 /*
1172                  * At least Host AP driver and a Prism3 card seemed to be
1173                  * generating streams of disconnected events when configuring
1174                  * IBSS for WPA-None. Ignore them for now.
1175                  */
1176                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1177                            "IBSS/WPA-None mode");
1178                 return;
1179         }
1180
1181         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1182             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1183                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1184                         "pre-shared key may be incorrect");
1185         }
1186         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1187                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1188         bssid = wpa_s->bssid;
1189         if (is_zero_ether_addr(bssid))
1190                 bssid = wpa_s->pending_bssid;
1191         wpa_blacklist_add(wpa_s, bssid);
1192         wpa_sm_notify_disassoc(wpa_s->wpa);
1193         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1194                 "remove keys");
1195         if (wpa_supplicant_dynamic_keys(wpa_s)) {
1196                 wpa_s->keys_cleared = 0;
1197                 wpa_clear_keys(wpa_s, wpa_s->bssid);
1198         }
1199         wpa_supplicant_mark_disassoc(wpa_s);
1200         bgscan_deinit(wpa_s);
1201 #ifdef CONFIG_SME
1202         if (authenticating &&
1203             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
1204                 /*
1205                  * mac80211-workaround to force deauth on failed auth cmd,
1206                  * requires us to remain in authenticating state to allow the
1207                  * second authentication attempt to be continued properly.
1208                  */
1209                 wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
1210                            "proceed after disconnection event");
1211                 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1212                 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1213         }
1214 #endif /* CONFIG_SME */
1215 }
1216
1217
1218 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1219 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1220                                                     void *sock_ctx)
1221 {
1222         struct wpa_supplicant *wpa_s = eloop_ctx;
1223
1224         if (!wpa_s->pending_mic_error_report)
1225                 return;
1226
1227         wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1228         wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1229         wpa_s->pending_mic_error_report = 0;
1230 }
1231 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1232
1233
1234 static void
1235 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1236                                          union wpa_event_data *data)
1237 {
1238         int pairwise;
1239         struct os_time t;
1240
1241         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1242         pairwise = (data && data->michael_mic_failure.unicast);
1243         os_get_time(&t);
1244         if ((wpa_s->last_michael_mic_error &&
1245              t.sec - wpa_s->last_michael_mic_error <= 60) ||
1246             wpa_s->pending_mic_error_report) {
1247                 if (wpa_s->pending_mic_error_report) {
1248                         /*
1249                          * Send the pending MIC error report immediately since
1250                          * we are going to start countermeasures and AP better
1251                          * do the same.
1252                          */
1253                         wpa_sm_key_request(wpa_s->wpa, 1,
1254                                            wpa_s->pending_mic_error_pairwise);
1255                 }
1256
1257                 /* Send the new MIC error report immediately since we are going
1258                  * to start countermeasures and AP better do the same.
1259                  */
1260                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1261
1262                 /* initialize countermeasures */
1263                 wpa_s->countermeasures = 1;
1264                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1265
1266                 /*
1267                  * Need to wait for completion of request frame. We do not get
1268                  * any callback for the message completion, so just wait a
1269                  * short while and hope for the best. */
1270                 os_sleep(0, 10000);
1271
1272                 wpa_drv_set_countermeasures(wpa_s, 1);
1273                 wpa_supplicant_deauthenticate(wpa_s,
1274                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
1275                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1276                                      wpa_s, NULL);
1277                 eloop_register_timeout(60, 0,
1278                                        wpa_supplicant_stop_countermeasures,
1279                                        wpa_s, NULL);
1280                 /* TODO: mark the AP rejected for 60 second. STA is
1281                  * allowed to associate with another AP.. */
1282         } else {
1283 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1284                 if (wpa_s->mic_errors_seen) {
1285                         /*
1286                          * Reduce the effectiveness of Michael MIC error
1287                          * reports as a means for attacking against TKIP if
1288                          * more than one MIC failure is noticed with the same
1289                          * PTK. We delay the transmission of the reports by a
1290                          * random time between 0 and 60 seconds in order to
1291                          * force the attacker wait 60 seconds before getting
1292                          * the information on whether a frame resulted in a MIC
1293                          * failure.
1294                          */
1295                         u8 rval[4];
1296                         int sec;
1297
1298                         if (os_get_random(rval, sizeof(rval)) < 0)
1299                                 sec = os_random() % 60;
1300                         else
1301                                 sec = WPA_GET_BE32(rval) % 60;
1302                         wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1303                                    "seconds", sec);
1304                         wpa_s->pending_mic_error_report = 1;
1305                         wpa_s->pending_mic_error_pairwise = pairwise;
1306                         eloop_cancel_timeout(
1307                                 wpa_supplicant_delayed_mic_error_report,
1308                                 wpa_s, NULL);
1309                         eloop_register_timeout(
1310                                 sec, os_random() % 1000000,
1311                                 wpa_supplicant_delayed_mic_error_report,
1312                                 wpa_s, NULL);
1313                 } else {
1314                         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1315                 }
1316 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1317                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1318 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1319         }
1320         wpa_s->last_michael_mic_error = t.sec;
1321         wpa_s->mic_errors_seen++;
1322 }
1323
1324
1325 #ifdef CONFIG_TERMINATE_ONLASTIF
1326 static int any_interfaces(struct wpa_supplicant *head)
1327 {
1328         struct wpa_supplicant *wpa_s;
1329
1330         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1331                 if (!wpa_s->interface_removed)
1332                         return 1;
1333         return 0;
1334 }
1335 #endif /* CONFIG_TERMINATE_ONLASTIF */
1336
1337
1338 static void
1339 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1340                                       union wpa_event_data *data)
1341 {
1342         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1343                 return;
1344
1345         switch (data->interface_status.ievent) {
1346         case EVENT_INTERFACE_ADDED:
1347                 if (!wpa_s->interface_removed)
1348                         break;
1349                 wpa_s->interface_removed = 0;
1350                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1351                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1352                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
1353                                    "after interface was added.");
1354                 }
1355                 break;
1356         case EVENT_INTERFACE_REMOVED:
1357                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1358                 wpa_s->interface_removed = 1;
1359                 wpa_supplicant_mark_disassoc(wpa_s);
1360                 l2_packet_deinit(wpa_s->l2);
1361                 wpa_s->l2 = NULL;
1362 #ifdef CONFIG_TERMINATE_ONLASTIF
1363                 /* check if last interface */
1364                 if (!any_interfaces(wpa_s->global->ifaces))
1365                         eloop_terminate();
1366 #endif /* CONFIG_TERMINATE_ONLASTIF */
1367                 break;
1368         }
1369 }
1370
1371
1372 #ifdef CONFIG_PEERKEY
1373 static void
1374 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1375                               union wpa_event_data *data)
1376 {
1377         if (data == NULL)
1378                 return;
1379         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1380 }
1381 #endif /* CONFIG_PEERKEY */
1382
1383
1384 #ifdef CONFIG_IEEE80211R
1385 static void
1386 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1387                                  union wpa_event_data *data)
1388 {
1389         if (data == NULL)
1390                 return;
1391
1392         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1393                                     data->ft_ies.ies_len,
1394                                     data->ft_ies.ft_action,
1395                                     data->ft_ies.target_ap,
1396                                     data->ft_ies.ric_ies,
1397                                     data->ft_ies.ric_ies_len) < 0) {
1398                 /* TODO: prevent MLME/driver from trying to associate? */
1399         }
1400 }
1401 #endif /* CONFIG_IEEE80211R */
1402
1403
1404 #ifdef CONFIG_IBSS_RSN
1405 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1406                                                 union wpa_event_data *data)
1407 {
1408         if (data == NULL)
1409                 return;
1410         ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1411 }
1412 #endif /* CONFIG_IBSS_RSN */
1413
1414
1415 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1416                           union wpa_event_data *data)
1417 {
1418         struct wpa_supplicant *wpa_s = ctx;
1419
1420         switch (event) {
1421         case EVENT_AUTH:
1422                 sme_event_auth(wpa_s, data);
1423                 break;
1424         case EVENT_ASSOC:
1425                 wpa_supplicant_event_assoc(wpa_s, data);
1426                 break;
1427         case EVENT_DISASSOC:
1428                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1429                         sme_event_disassoc(wpa_s, data);
1430                 /* fall through */
1431         case EVENT_DEAUTH:
1432                 wpa_supplicant_event_disassoc(wpa_s);
1433                 break;
1434         case EVENT_MICHAEL_MIC_FAILURE:
1435                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1436                 break;
1437 #ifndef CONFIG_NO_SCAN_PROCESSING
1438         case EVENT_SCAN_RESULTS:
1439                 wpa_supplicant_event_scan_results(wpa_s, data);
1440                 break;
1441 #endif /* CONFIG_NO_SCAN_PROCESSING */
1442         case EVENT_ASSOCINFO:
1443                 wpa_supplicant_event_associnfo(wpa_s, data);
1444                 break;
1445         case EVENT_INTERFACE_STATUS:
1446                 wpa_supplicant_event_interface_status(wpa_s, data);
1447                 break;
1448         case EVENT_PMKID_CANDIDATE:
1449                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1450                 break;
1451 #ifdef CONFIG_PEERKEY
1452         case EVENT_STKSTART:
1453                 wpa_supplicant_event_stkstart(wpa_s, data);
1454                 break;
1455 #endif /* CONFIG_PEERKEY */
1456 #ifdef CONFIG_IEEE80211R
1457         case EVENT_FT_RESPONSE:
1458                 wpa_supplicant_event_ft_response(wpa_s, data);
1459                 break;
1460 #endif /* CONFIG_IEEE80211R */
1461 #ifdef CONFIG_IBSS_RSN
1462         case EVENT_IBSS_RSN_START:
1463                 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1464                 break;
1465 #endif /* CONFIG_IBSS_RSN */
1466         case EVENT_ASSOC_REJECT:
1467                 sme_event_assoc_reject(wpa_s, data);
1468                 break;
1469         case EVENT_AUTH_TIMED_OUT:
1470                 sme_event_auth_timed_out(wpa_s, data);
1471                 break;
1472         case EVENT_ASSOC_TIMED_OUT:
1473                 sme_event_assoc_timed_out(wpa_s, data);
1474                 break;
1475 #ifdef CONFIG_AP
1476         case EVENT_TX_STATUS:
1477                 if (wpa_s->ap_iface == NULL)
1478                         break;
1479                 switch (data->tx_status.type) {
1480                 case WLAN_FC_TYPE_MGMT:
1481                         ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
1482                                       data->tx_status.data_len,
1483                                       data->tx_status.stype,
1484                                       data->tx_status.ack);
1485                         break;
1486                 case WLAN_FC_TYPE_DATA:
1487                         ap_tx_status(wpa_s, data->tx_status.dst,
1488                                      data->tx_status.data,
1489                                      data->tx_status.data_len,
1490                                      data->tx_status.ack);
1491                         break;
1492                 }
1493                 break;
1494         case EVENT_RX_FROM_UNKNOWN:
1495                 if (wpa_s->ap_iface == NULL)
1496                         break;
1497                 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.hdr,
1498                                        data->rx_from_unknown.len);
1499                 break;
1500         case EVENT_RX_MGMT:
1501                 if (wpa_s->ap_iface == NULL)
1502                         break;
1503                 ap_mgmt_rx(wpa_s, data->rx_mgmt.frame,
1504                            data->rx_mgmt.frame_len, data->rx_mgmt.fi);
1505                 break;
1506 #endif /* CONFIG_AP */
1507 #ifdef CONFIG_CLIENT_MLME
1508         case EVENT_MLME_RX: {
1509                 struct ieee80211_rx_status rx_status;
1510                 os_memset(&rx_status, 0, sizeof(rx_status));
1511                 rx_status.freq = data->mlme_rx.freq;
1512                 rx_status.channel = data->mlme_rx.channel;
1513                 rx_status.ssi = data->mlme_rx.ssi;
1514                 ieee80211_sta_rx(wpa_s, data->mlme_rx.buf, data->mlme_rx.len,
1515                                  &rx_status);
1516                 break;
1517         }
1518 #endif /* CONFIG_CLIENT_MLME */
1519
1520         default:
1521                 wpa_printf(MSG_INFO, "Unknown event %d", event);
1522                 break;
1523         }
1524 }