wpa_supplicant/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eapol_supp/eapol_supp_sm.h"
  19 #include "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 "preauth.h"
  27 #include "pmksa_cache.h"
  28 #include "wpa_ctrl.h"
  29 #include "eap_peer/eap.h"
  30 #include "notify.h"
  31 #include "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
  39
  40 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  41 {
  42         struct wpa_ssid *ssid, *old_ssid;
  43
  44         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  45                 return 0;
  46
  47         wpa_printf(MSG_DEBUG, "Select network based on association "
  48                    "information");
  49         ssid = wpa_supplicant_get_ssid(wpa_s);
  50         if (ssid == NULL) {
  51                 wpa_printf(MSG_INFO, "No network configuration found for the "
  52                            "current AP");
  53                 return -1;
  54         }
  55
  56         if (ssid->disabled) {
  57                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  58                 return -1;
  59         }
  60
  61         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  62                    "AP");
  63         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  64                               WPA_KEY_MGMT_WPA_NONE |
  65                               WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
  66                               WPA_KEY_MGMT_PSK_SHA256 |
  67                               WPA_KEY_MGMT_IEEE8021X_SHA256)) {
  68                 u8 wpa_ie[80];
  69                 size_t wpa_ie_len = sizeof(wpa_ie);
  70                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  71                                           wpa_ie, &wpa_ie_len);
  72         } else {
  73                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  74         }
  75
  76         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  77                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  78         old_ssid = wpa_s->current_ssid;
  79         wpa_s->current_ssid = ssid;
  80         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  81         wpa_supplicant_initiate_eapol(wpa_s);
  82         if (old_ssid != wpa_s->current_ssid)
  83                 wpas_notify_network_changed(wpa_s);
  84
  85         return 0;
  86 }
  87
  88
  89 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  90                                                 void *sock_ctx)
  91 {
  92         struct wpa_supplicant *wpa_s = eloop_ctx;
  93
  94         if (wpa_s->countermeasures) {
  95                 wpa_s->countermeasures = 0;
  96                 wpa_drv_set_countermeasures(wpa_s, 0);
  97                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
  98                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  99         }
 100 }
 101
 102
 103 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 104 {
 105         int bssid_changed;
 106
 107         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 108         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 109         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 110         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 111         if (bssid_changed)
 112                 wpas_notify_bssid_changed(wpa_s);
 113
 114         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 115         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 116         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 117                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 118         wpa_s->ap_ies_from_associnfo = 0;
 119 }
 120
 121
 122 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 123 {
 124         struct wpa_ie_data ie;
 125         int pmksa_set = -1;
 126         size_t i;
 127
 128         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 129             ie.pmkid == NULL)
 130                 return;
 131
 132         for (i = 0; i < ie.num_pmkid; i++) {
 133                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 134                                                     ie.pmkid + i * PMKID_LEN,
 135                                                     NULL, NULL, 0);
 136                 if (pmksa_set == 0) {
 137                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 138                         break;
 139                 }
 140         }
 141
 142         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 143                    "cache", pmksa_set == 0 ? "" : "not ");
 144 }
 145
 146
 147 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 148                                                  union wpa_event_data *data)
 149 {
 150         if (data == NULL) {
 151                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 152                 return;
 153         }
 154         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 155                    " index=%d preauth=%d",
 156                    MAC2STR(data->pmkid_candidate.bssid),
 157                    data->pmkid_candidate.index,
 158                    data->pmkid_candidate.preauth);
 159
 160         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 161                             data->pmkid_candidate.index,
 162                             data->pmkid_candidate.preauth);
 163 }
 164
 165
 166 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 167 {
 168         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 169             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 170                 return 0;
 171
 172 #ifdef IEEE8021X_EAPOL
 173         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 174             wpa_s->current_ssid &&
 175             !(wpa_s->current_ssid->eapol_flags &
 176               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 177                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 178                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 179                  * plaintext or static WEP keys). */
 180                 return 0;
 181         }
 182 #endif /* IEEE8021X_EAPOL */
 183
 184         return 1;
 185 }
 186
 187
 188 /**
 189  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 190  * @wpa_s: pointer to wpa_supplicant data
 191  * @ssid: Configuration data for the network
 192  * Returns: 0 on success, -1 on failure
 193  *
 194  * This function is called when starting authentication with a network that is
 195  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 196  */
 197 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 198                               struct wpa_ssid *ssid)
 199 {
 200 #ifdef IEEE8021X_EAPOL
 201         int aka = 0, sim = 0, type;
 202
 203         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 204                 return 0;
 205
 206         if (ssid->eap.eap_methods == NULL) {
 207                 sim = 1;
 208                 aka = 1;
 209         } else {
 210                 struct eap_method_type *eap = ssid->eap.eap_methods;
 211                 while (eap->vendor != EAP_VENDOR_IETF ||
 212                        eap->method != EAP_TYPE_NONE) {
 213                         if (eap->vendor == EAP_VENDOR_IETF) {
 214                                 if (eap->method == EAP_TYPE_SIM)
 215                                         sim = 1;
 216                                 else if (eap->method == EAP_TYPE_AKA)
 217                                         aka = 1;
 218                         }
 219                         eap++;
 220                 }
 221         }
 222
 223         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 224                 sim = 0;
 225         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 226                 aka = 0;
 227
 228         if (!sim && !aka) {
 229                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 230                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 231                 return 0;
 232         }
 233
 234         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 235                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 236         if (sim && aka)
 237                 type = SCARD_TRY_BOTH;
 238         else if (aka)
 239                 type = SCARD_USIM_ONLY;
 240         else
 241                 type = SCARD_GSM_SIM_ONLY;
 242
 243         wpa_s->scard = scard_init(type);
 244         if (wpa_s->scard == NULL) {
 245                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 246                            "(pcsc-lite)");
 247                 return -1;
 248         }
 249         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 250         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 251 #endif /* IEEE8021X_EAPOL */
 252
 253         return 0;
 254 }
 255
 256
 257 #ifndef CONFIG_NO_SCAN_PROCESSING
 258 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 259                                         struct wpa_ssid *ssid)
 260 {
 261         int i, privacy = 0;
 262
 263         if (ssid->mixed_cell)
 264                 return 1;
 265
 266 #ifdef CONFIG_WPS
 267         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 268                 return 1;
 269 #endif /* CONFIG_WPS */
 270
 271         for (i = 0; i < NUM_WEP_KEYS; i++) {
 272                 if (ssid->wep_key_len[i]) {
 273                         privacy = 1;
 274                         break;
 275                 }
 276         }
 277 #ifdef IEEE8021X_EAPOL
 278         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 279             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 280                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 281                 privacy = 1;
 282 #endif /* IEEE8021X_EAPOL */
 283
 284         if (bss->caps & IEEE80211_CAP_PRIVACY)
 285                 return privacy;
 286         return !privacy;
 287 }
 288
 289
 290 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
 291                                          struct wpa_ssid *ssid,
 292                                          struct wpa_scan_res *bss)
 293 {
 294         struct wpa_ie_data ie;
 295         int proto_match = 0;
 296         const u8 *rsn_ie, *wpa_ie;
 297         int ret;
 298
 299         ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
 300         if (ret >= 0)
 301                 return ret;
 302
 303         rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 304         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 305                 proto_match++;
 306
 307                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 308                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 309                         break;
 310                 }
 311                 if (!(ie.proto & ssid->proto)) {
 312                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 313                                    "mismatch");
 314                         break;
 315                 }
 316
 317                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 318                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 319                                    "mismatch");
 320                         break;
 321                 }
 322
 323                 if (!(ie.group_cipher & ssid->group_cipher)) {
 324                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 325                                    "mismatch");
 326                         break;
 327                 }
 328
 329                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 330                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 331                                    "mismatch");
 332                         break;
 333                 }
 334
 335 #ifdef CONFIG_IEEE80211W
 336                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 337                     ssid->ieee80211w == IEEE80211W_REQUIRED) {
 338                         wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 339                                    "protection");
 340                         break;
 341                 }
 342 #endif /* CONFIG_IEEE80211W */
 343
 344                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 345                 return 1;
 346         }
 347
 348         wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 349         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 350                 proto_match++;
 351
 352                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 353                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 354                         break;
 355                 }
 356                 if (!(ie.proto & ssid->proto)) {
 357                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 358                                    "mismatch");
 359                         break;
 360                 }
 361
 362                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 363                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 364                                    "mismatch");
 365                         break;
 366                 }
 367
 368                 if (!(ie.group_cipher & ssid->group_cipher)) {
 369                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 370                                    "mismatch");
 371                         break;
 372                 }
 373
 374                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 375                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 376                                    "mismatch");
 377                         break;
 378                 }
 379
 380                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 381                 return 1;
 382         }
 383
 384         if (proto_match == 0)
 385                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 386
 387         return 0;
 388 }
 389
 390
 391 static struct wpa_scan_res *
 392 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
 393                               struct wpa_ssid *group,
 394                               struct wpa_ssid **selected_ssid)
 395 {
 396         struct wpa_ssid *ssid;
 397         struct wpa_scan_res *bss;
 398         size_t i;
 399         struct wpa_blacklist *e;
 400         const u8 *ie;
 401
 402         wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 403         for (i = 0; i < wpa_s->scan_res->num; i++) {
 404                 const u8 *ssid_;
 405                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 406                 bss = wpa_s->scan_res->res[i];
 407
 408                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 409                 ssid_ = ie ? ie + 2 : (u8 *) "";
 410                 ssid_len = ie ? ie[1] : 0;
 411
 412                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 413                 wpa_ie_len = ie ? ie[1] : 0;
 414
 415                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 416                 rsn_ie_len = ie ? ie[1] : 0;
 417
 418                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 419                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 420                            (int) i, MAC2STR(bss->bssid),
 421                            wpa_ssid_txt(ssid_, ssid_len),
 422                            wpa_ie_len, rsn_ie_len, bss->caps);
 423
 424                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 425                 if (e && e->count > 1) {
 426                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 427                         continue;
 428                 }
 429
 430                 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
 431                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 432                         continue;
 433                 }
 434
 435                 for (ssid = group; ssid; ssid = ssid->pnext) {
 436                         int check_ssid = 1;
 437
 438                         if (ssid->disabled) {
 439                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 440                                 continue;
 441                         }
 442
 443 #ifdef CONFIG_WPS
 444                         if (ssid->ssid_len == 0 &&
 445                             wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 446                                 check_ssid = 0;
 447 #endif /* CONFIG_WPS */
 448
 449                         if (check_ssid &&
 450                             (ssid_len != ssid->ssid_len ||
 451                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 452                                 wpa_printf(MSG_DEBUG, "   skip - "
 453                                            "SSID mismatch");
 454                                 continue;
 455                         }
 456
 457                         if (ssid->bssid_set &&
 458                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 459                         {
 460                                 wpa_printf(MSG_DEBUG, "   skip - "
 461                                            "BSSID mismatch");
 462                                 continue;
 463                         }
 464
 465                         if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
 466                                 continue;
 467
 468                         wpa_printf(MSG_DEBUG, "   selected WPA AP "
 469                                    MACSTR " ssid='%s'",
 470                                    MAC2STR(bss->bssid),
 471                                    wpa_ssid_txt(ssid_, ssid_len));
 472                         *selected_ssid = ssid;
 473                         return bss;
 474                 }
 475         }
 476
 477         return NULL;
 478 }
 479
 480
 481 static struct wpa_scan_res *
 482 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
 483                                   struct wpa_ssid *group,
 484                                   struct wpa_ssid **selected_ssid)
 485 {
 486         struct wpa_ssid *ssid;
 487         struct wpa_scan_res *bss;
 488         size_t i;
 489         struct wpa_blacklist *e;
 490         const u8 *ie;
 491
 492         wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 493         for (i = 0; i < wpa_s->scan_res->num; i++) {
 494                 const u8 *ssid_;
 495                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 496                 bss = wpa_s->scan_res->res[i];
 497
 498                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 499                 ssid_ = ie ? ie + 2 : (u8 *) "";
 500                 ssid_len = ie ? ie[1] : 0;
 501
 502                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 503                 wpa_ie_len = ie ? ie[1] : 0;
 504
 505                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 506                 rsn_ie_len = ie ? ie[1] : 0;
 507
 508                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 509                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 510                            (int) i, MAC2STR(bss->bssid),
 511                            wpa_ssid_txt(ssid_, ssid_len),
 512                            wpa_ie_len, rsn_ie_len, bss->caps);
 513
 514                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 515                 if (e && e->count > 1) {
 516                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 517                         continue;
 518                 }
 519
 520                 for (ssid = group; ssid; ssid = ssid->pnext) {
 521                         int check_ssid = ssid->ssid_len != 0;
 522
 523                         if (ssid->disabled) {
 524                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 525                                 continue;
 526                         }
 527
 528 #ifdef CONFIG_WPS
 529                         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 530                                 /* Only allow wildcard SSID match if an AP
 531                                  * advertises active WPS operation that matches
 532                                  * with our mode. */
 533                                 check_ssid = 1;
 534                                 if (ssid->ssid_len == 0 &&
 535                                     wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
 536                                                               bss))
 537                                         check_ssid = 0;
 538                         }
 539 #endif /* CONFIG_WPS */
 540
 541                         if (check_ssid &&
 542                             (ssid_len != ssid->ssid_len ||
 543                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 544                                 wpa_printf(MSG_DEBUG, "   skip - "
 545                                            "SSID mismatch");
 546                                 continue;
 547                         }
 548
 549                         if (ssid->bssid_set &&
 550                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 551                         {
 552                                 wpa_printf(MSG_DEBUG, "   skip - "
 553                                            "BSSID mismatch");
 554                                 continue;
 555                         }
 556
 557                         if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 558                             !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
 559                             !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 560                         {
 561                                 wpa_printf(MSG_DEBUG, "   skip - "
 562                                            "non-WPA network not allowed");
 563                                 continue;
 564                         }
 565
 566                         if ((ssid->key_mgmt &
 567                              (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 568                               WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
 569                               WPA_KEY_MGMT_IEEE8021X_SHA256 |
 570                               WPA_KEY_MGMT_PSK_SHA256)) &&
 571                             (wpa_ie_len != 0 || rsn_ie_len != 0)) {
 572                                 wpa_printf(MSG_DEBUG, "   skip - "
 573                                            "WPA network");
 574                                 continue;
 575                         }
 576
 577                         if (!wpa_supplicant_match_privacy(bss, ssid)) {
 578                                 wpa_printf(MSG_DEBUG, "   skip - "
 579                                            "privacy mismatch");
 580                                 continue;
 581                         }
 582
 583                         if (bss->caps & IEEE80211_CAP_IBSS) {
 584                                 wpa_printf(MSG_DEBUG, "   skip - "
 585                                            "IBSS (adhoc) network");
 586                                 continue;
 587                         }
 588
 589                         wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 590                                    MACSTR " ssid='%s'",
 591                                    MAC2STR(bss->bssid),
 592                                    wpa_ssid_txt(ssid_, ssid_len));
 593                         *selected_ssid = ssid;
 594                         return bss;
 595                 }
 596         }
 597
 598         return NULL;
 599 }
 600
 601
 602 static struct wpa_scan_res *
 603 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 604                           struct wpa_ssid **selected_ssid)
 605 {
 606         struct wpa_scan_res *selected;
 607
 608         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 609                    group->priority);
 610
 611         /* First, try to find WPA-enabled AP */
 612         selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
 613         if (selected)
 614                 return selected;
 615
 616         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 617          * allows this. */
 618         return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
 619 }
 620
 621
 622 static struct wpa_scan_res *
 623 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 624                             struct wpa_ssid **selected_ssid)
 625 {
 626         struct wpa_scan_res *selected = NULL;
 627         int prio;
 628
 629         while (selected == NULL) {
 630                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 631                         selected = wpa_supplicant_select_bss(
 632                                 wpa_s, wpa_s->conf->pssid[prio],
 633                                 selected_ssid);
 634                         if (selected)
 635                                 break;
 636                 }
 637
 638                 if (selected == NULL && wpa_s->blacklist) {
 639                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 640                                    "and try again");
 641                         wpa_blacklist_clear(wpa_s);
 642                         wpa_s->blacklist_cleared++;
 643                 } else if (selected == NULL)
 644                         break;
 645         }
 646
 647         return selected;
 648 }
 649
 650
 651 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
 652                                         int timeout)
 653 {
 654         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 655                 /*
 656                  * Quick recovery if the initial scan results were not
 657                  * complete when fetched before the first scan request.
 658                  */
 659                 wpa_s->scan_res_tried++;
 660                 timeout = 0;
 661         }
 662         wpa_supplicant_req_scan(wpa_s, timeout, 0);
 663 }
 664
 665
 666 static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 667                                    struct wpa_scan_res *selected,
 668                                    struct wpa_ssid *ssid)
 669 {
 670         if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
 671                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
 672                         "PBC session overlap");
 673                 wpa_supplicant_req_new_scan(wpa_s, 10);
 674                 return;
 675         }
 676
 677         /*
 678          * Do not trigger new association unless the BSSID has changed or if
 679          * reassociation is requested. If we are in process of associating with
 680          * the selected BSSID, do not trigger new attempt.
 681          */
 682         if (wpa_s->reassociate ||
 683             (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 684              (wpa_s->wpa_state != WPA_ASSOCIATING ||
 685               os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
 686               0))) {
 687                 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 688                         wpa_supplicant_req_new_scan(wpa_s, 10);
 689                         return;
 690                 }
 691                 wpa_supplicant_associate(wpa_s, selected, ssid);
 692         } else {
 693                 wpa_printf(MSG_DEBUG, "Already associated with the selected "
 694                            "AP");
 695         }
 696         rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
 697 }
 698
 699
 700 static struct wpa_ssid *
 701 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
 702 {
 703         int prio;
 704         struct wpa_ssid *ssid;
 705
 706         for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 707                 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
 708                 {
 709                         if (ssid->disabled)
 710                                 continue;
 711                         if (ssid->mode == IEEE80211_MODE_IBSS ||
 712                             ssid->mode == IEEE80211_MODE_AP)
 713                                 return ssid;
 714                 }
 715         }
 716         return NULL;
 717 }
 718
 719
 720 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 721 {
 722         struct wpa_scan_res *selected;
 723         struct wpa_ssid *ssid = NULL;
 724
 725         wpa_supplicant_notify_scanning(wpa_s, 0);
 726
 727         if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 728                 if (wpa_s->conf->ap_scan == 2)
 729                         return;
 730                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 731                            "scanning again");
 732                 wpa_supplicant_req_new_scan(wpa_s, 1);
 733                 return;
 734         }
 735
 736         /*
 737          * Don't post the results if this was the initial cached
 738          * and there were no results.
 739          */
 740         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
 741             wpa_s->scan_res->num == 0) {
 742                 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
 743                         "empty - not posting");
 744         } else {
 745                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
 746                 wpas_notify_scan_results(wpa_s);
 747         }
 748
 749         wpas_notify_scan_done(wpa_s, 1);
 750
 751         if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
 752                 return;
 753
 754         if (wpa_s->disconnected) {
 755                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 756                 return;
 757         }
 758
 759         if (bgscan_notify_scan(wpa_s) == 1)
 760                 return;
 761
 762         selected = wpa_supplicant_pick_network(wpa_s, &ssid);
 763         if (selected) {
 764                 wpa_supplicant_connect(wpa_s, selected, ssid);
 765         } else {
 766                 wpa_printf(MSG_DEBUG, "No suitable network found");
 767                 ssid = wpa_supplicant_pick_new_network(wpa_s);
 768                 if (ssid) {
 769                         wpa_printf(MSG_DEBUG, "Setup a new network");
 770                         wpa_supplicant_associate(wpa_s, NULL, ssid);
 771                 } else
 772                         wpa_supplicant_req_new_scan(wpa_s, 5);
 773         }
 774 }
 775 #endif /* CONFIG_NO_SCAN_PROCESSING */
 776
 777
 778 #ifdef CONFIG_IEEE80211R
 779 static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
 780                                     const u8 *ftie, const u8 *mdie)
 781 {
 782         const u8 *mobility_domain = NULL;
 783         const u8 *r0kh_id = NULL;
 784         size_t r0kh_id_len = 0;
 785         const u8 *r1kh_id = NULL;
 786         struct rsn_ftie *hdr;
 787         const u8 *pos, *end;
 788
 789         if (mdie == NULL || ftie == NULL)
 790                 return;
 791
 792         if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
 793                 mobility_domain = mdie + 2;
 794 #ifdef CONFIG_SME
 795                 wpa_s->sme.ft_used = 1;
 796                 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
 797 #endif /* CONFIG_SME */
 798         }
 799         if (ftie[1] >= sizeof(struct rsn_ftie)) {
 800                 end = ftie + 2 + ftie[1];
 801                 hdr = (struct rsn_ftie *) (ftie + 2);
 802                 pos = (const u8 *) (hdr + 1);
 803                 while (pos + 1 < end) {
 804                         if (pos + 2 + pos[1] > end)
 805                                 break;
 806                         if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
 807                             pos[1] == FT_R1KH_ID_LEN)
 808                                 r1kh_id = pos + 2;
 809                         else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
 810                                  pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
 811                                 r0kh_id = pos + 2;
 812                                 r0kh_id_len = pos[1];
 813                         }
 814                         pos += 2 + pos[1];
 815                 }
 816         }
 817         wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
 818                              r0kh_id_len, r1kh_id);
 819 }
 820 #endif /* CONFIG_IEEE80211R */
 821
 822 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 823                                            union wpa_event_data *data)
 824 {
 825         int l, len, found = 0, wpa_found, rsn_found;
 826         const u8 *p;
 827 #ifdef CONFIG_IEEE80211R
 828         const u8 *mdie = NULL, *ftie = NULL;
 829 #endif /* CONFIG_IEEE80211R */
 830
 831         wpa_printf(MSG_DEBUG, "Association info event");
 832         if (data->assoc_info.req_ies)
 833                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 834                             data->assoc_info.req_ies_len);
 835         if (data->assoc_info.resp_ies)
 836                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 837                             data->assoc_info.resp_ies_len);
 838         if (data->assoc_info.beacon_ies)
 839                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 840                             data->assoc_info.beacon_ies,
 841                             data->assoc_info.beacon_ies_len);
 842
 843         p = data->assoc_info.req_ies;
 844         l = data->assoc_info.req_ies_len;
 845
 846         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 847         while (p && l >= 2) {
 848                 len = p[1] + 2;
 849                 if (len > l) {
 850                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 851                                     p, l);
 852                         break;
 853                 }
 854                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 855                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 856                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
 857                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 858                                 break;
 859                         found = 1;
 860                         wpa_find_assoc_pmkid(wpa_s);
 861                         break;
 862                 }
 863                 l -= len;
 864                 p += len;
 865         }
 866         if (!found && data->assoc_info.req_ies)
 867                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 868
 869 #ifdef CONFIG_IEEE80211R
 870         p = data->assoc_info.resp_ies;
 871         l = data->assoc_info.resp_ies_len;
 872
 873         /* Go through the IEs and make a copy of the FT/MD IE, if present. */
 874         while (p && l >= 2) {
 875                 len = p[1] + 2;
 876                 if (len > l) {
 877                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 878                                     p, l);
 879                         break;
 880                 }
 881                 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
 882                         ftie = p;
 883                 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
 884                         mdie = p;
 885                 l -= len;
 886                 p += len;
 887         }
 888
 889         wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
 890 #endif /* CONFIG_IEEE80211R */
 891
 892         /* WPA/RSN IE from Beacon/ProbeResp */
 893         p = data->assoc_info.beacon_ies;
 894         l = data->assoc_info.beacon_ies_len;
 895
 896         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 897          */
 898         wpa_found = rsn_found = 0;
 899         while (p && l >= 2) {
 900                 len = p[1] + 2;
 901                 if (len > l) {
 902                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 903                                     p, l);
 904                         break;
 905                 }
 906                 if (!wpa_found &&
 907                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 908                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 909                         wpa_found = 1;
 910                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 911                 }
 912
 913                 if (!rsn_found &&
 914                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
 915                         rsn_found = 1;
 916                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 917                 }
 918
 919                 l -= len;
 920                 p += len;
 921         }
 922
 923         if (!wpa_found && data->assoc_info.beacon_ies)
 924                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 925         if (!rsn_found && data->assoc_info.beacon_ies)
 926                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 927         if (wpa_found || rsn_found)
 928                 wpa_s->ap_ies_from_associnfo = 1;
 929 }
 930
 931
 932 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 933                                        union wpa_event_data *data)
 934 {
 935         u8 bssid[ETH_ALEN];
 936         int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
 937         int bssid_changed;
 938         struct wpa_driver_capa capa;
 939
 940         if (data)
 941                 wpa_supplicant_event_associnfo(wpa_s, data);
 942
 943         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 944         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
 945                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
 946         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
 947             (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
 948              os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
 949                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
 950                         MACSTR, MAC2STR(bssid));
 951                 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
 952                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
 953                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 954                 if (bssid_changed)
 955                         wpas_notify_bssid_changed(wpa_s);
 956
 957                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
 958                         wpa_clear_keys(wpa_s, bssid);
 959                 }
 960                 if (wpa_supplicant_select_config(wpa_s) < 0) {
 961                         wpa_supplicant_disassociate(
 962                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 963                         return;
 964                 }
 965         }
 966
 967         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
 968         if (wpa_s->current_ssid) {
 969                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
 970                  * initialized before association, but for other modes,
 971                  * initialize PC/SC here, if the current configuration needs
 972                  * smartcard or SIM/USIM. */
 973                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
 974         }
 975         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
 976         l2_packet_notify_auth_start(wpa_s->l2);
 977
 978         /*
 979          * Set portEnabled first to FALSE in order to get EAP state machine out
 980          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
 981          * state machine may transit to AUTHENTICATING state based on obsolete
 982          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
 983          * AUTHENTICATED without ever giving chance to EAP state machine to
 984          * reset the state.
 985          */
 986         if (!ft_completed) {
 987                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 988                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 989         }
 990         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
 991                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 992         /* 802.1X::portControl = Auto */
 993         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
 994         wpa_s->eapol_received = 0;
 995         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 996             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 997                 wpa_supplicant_cancel_auth_timeout(wpa_s);
 998                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 999         } else if (!ft_completed) {
1000                 /* Timeout for receiving the first EAPOL packet */
1001                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1002         }
1003         wpa_supplicant_cancel_scan(wpa_s);
1004
1005         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1006             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1007                 /*
1008                  * We are done; the driver will take care of RSN 4-way
1009                  * handshake.
1010                  */
1011                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1012                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1013                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1014                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1015         }
1016
1017         if (wpa_s->pending_eapol_rx) {
1018                 struct os_time now, age;
1019                 os_get_time(&now);
1020                 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1021                 if (age.sec == 0 && age.usec < 100000 &&
1022                     os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1023                     0) {
1024                         wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1025                                    "that was received just before association "
1026                                    "notification");
1027                         wpa_supplicant_rx_eapol(
1028                                 wpa_s, wpa_s->pending_eapol_rx_src,
1029                                 wpabuf_head(wpa_s->pending_eapol_rx),
1030                                 wpabuf_len(wpa_s->pending_eapol_rx));
1031                 }
1032                 wpabuf_free(wpa_s->pending_eapol_rx);
1033                 wpa_s->pending_eapol_rx = NULL;
1034         }
1035
1036 #ifdef CONFIG_BGSCAN
1037         if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1038                 bgscan_deinit(wpa_s);
1039                 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1040                         if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1041                                 wpa_printf(MSG_DEBUG, "Failed to initialize "
1042                                            "bgscan");
1043                                 /*
1044                                  * Live without bgscan; it is only used as a
1045                                  * roaming optimization, so the initial
1046                                  * connection is not affected.
1047                                  */
1048                         } else
1049                                 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1050                 } else
1051                         wpa_s->bgscan_ssid = NULL;
1052         }
1053 #endif /* CONFIG_BGSCAN */
1054
1055         if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1056              wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1057             wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1058             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1059                 /* Set static WEP keys again */
1060                 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1061         }
1062 }
1063
1064
1065 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1066 {
1067         const u8 *bssid;
1068
1069         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1070                 /*
1071                  * At least Host AP driver and a Prism3 card seemed to be
1072                  * generating streams of disconnected events when configuring
1073                  * IBSS for WPA-None. Ignore them for now.
1074                  */
1075                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1076                            "IBSS/WPA-None mode");
1077                 return;
1078         }
1079
1080         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1081             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1082                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1083                         "pre-shared key may be incorrect");
1084         }
1085         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1086                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1087         bssid = wpa_s->bssid;
1088         if (is_zero_ether_addr(bssid))
1089                 bssid = wpa_s->pending_bssid;
1090         wpa_blacklist_add(wpa_s, bssid);
1091         wpa_sm_notify_disassoc(wpa_s->wpa);
1092         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1093                 "remove keys");
1094         if (wpa_supplicant_dynamic_keys(wpa_s)) {
1095                 wpa_s->keys_cleared = 0;
1096                 wpa_clear_keys(wpa_s, wpa_s->bssid);
1097         }
1098         wpa_supplicant_mark_disassoc(wpa_s);
1099         bgscan_deinit(wpa_s);
1100 }
1101
1102
1103 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1104 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1105                                                     void *sock_ctx)
1106 {
1107         struct wpa_supplicant *wpa_s = eloop_ctx;
1108
1109         if (!wpa_s->pending_mic_error_report)
1110                 return;
1111
1112         wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1113         wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1114         wpa_s->pending_mic_error_report = 0;
1115 }
1116 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1117
1118
1119 static void
1120 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1121                                          union wpa_event_data *data)
1122 {
1123         int pairwise;
1124         struct os_time t;
1125
1126         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1127         pairwise = (data && data->michael_mic_failure.unicast);
1128         os_get_time(&t);
1129         if ((wpa_s->last_michael_mic_error &&
1130              t.sec - wpa_s->last_michael_mic_error <= 60) ||
1131             wpa_s->pending_mic_error_report) {
1132                 if (wpa_s->pending_mic_error_report) {
1133                         /*
1134                          * Send the pending MIC error report immediately since
1135                          * we are going to start countermeasures and AP better
1136                          * do the same.
1137                          */
1138                         wpa_sm_key_request(wpa_s->wpa, 1,
1139                                            wpa_s->pending_mic_error_pairwise);
1140                 }
1141
1142                 /* Send the new MIC error report immediately since we are going
1143                  * to start countermeasures and AP better do the same.
1144                  */
1145                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1146
1147                 /* initialize countermeasures */
1148                 wpa_s->countermeasures = 1;
1149                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1150
1151                 /*
1152                  * Need to wait for completion of request frame. We do not get
1153                  * any callback for the message completion, so just wait a
1154                  * short while and hope for the best. */
1155                 os_sleep(0, 10000);
1156
1157                 wpa_drv_set_countermeasures(wpa_s, 1);
1158                 wpa_supplicant_deauthenticate(wpa_s,
1159                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
1160                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1161                                      wpa_s, NULL);
1162                 eloop_register_timeout(60, 0,
1163                                        wpa_supplicant_stop_countermeasures,
1164                                        wpa_s, NULL);
1165                 /* TODO: mark the AP rejected for 60 second. STA is
1166                  * allowed to associate with another AP.. */
1167         } else {
1168 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1169                 if (wpa_s->mic_errors_seen) {
1170                         /*
1171                          * Reduce the effectiveness of Michael MIC error
1172                          * reports as a means for attacking against TKIP if
1173                          * more than one MIC failure is noticed with the same
1174                          * PTK. We delay the transmission of the reports by a
1175                          * random time between 0 and 60 seconds in order to
1176                          * force the attacker wait 60 seconds before getting
1177                          * the information on whether a frame resulted in a MIC
1178                          * failure.
1179                          */
1180                         u8 rval[4];
1181                         int sec;
1182
1183                         if (os_get_random(rval, sizeof(rval)) < 0)
1184                                 sec = os_random() % 60;
1185                         else
1186                                 sec = WPA_GET_BE32(rval) % 60;
1187                         wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1188                                    "seconds", sec);
1189                         wpa_s->pending_mic_error_report = 1;
1190                         wpa_s->pending_mic_error_pairwise = pairwise;
1191                         eloop_cancel_timeout(
1192                                 wpa_supplicant_delayed_mic_error_report,
1193                                 wpa_s, NULL);
1194                         eloop_register_timeout(
1195                                 sec, os_random() % 1000000,
1196                                 wpa_supplicant_delayed_mic_error_report,
1197                                 wpa_s, NULL);
1198                 } else {
1199                         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1200                 }
1201 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1202                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1203 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1204         }
1205         wpa_s->last_michael_mic_error = t.sec;
1206         wpa_s->mic_errors_seen++;
1207 }
1208
1209
1210 #ifdef CONFIG_TERMINATE_ONLASTIF
1211 static int any_interfaces(struct wpa_supplicant *head)
1212 {
1213         struct wpa_supplicant *wpa_s;
1214
1215         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1216                 if (!wpa_s->interface_removed)
1217                         return 1;
1218         return 0;
1219 }
1220 #endif /* CONFIG_TERMINATE_ONLASTIF */
1221
1222
1223 static void
1224 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1225                                       union wpa_event_data *data)
1226 {
1227         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1228                 return;
1229
1230         switch (data->interface_status.ievent) {
1231         case EVENT_INTERFACE_ADDED:
1232                 if (!wpa_s->interface_removed)
1233                         break;
1234                 wpa_s->interface_removed = 0;
1235                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1236                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1237                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
1238                                    "after interface was added.");
1239                 }
1240                 break;
1241         case EVENT_INTERFACE_REMOVED:
1242                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1243                 wpa_s->interface_removed = 1;
1244                 wpa_supplicant_mark_disassoc(wpa_s);
1245                 l2_packet_deinit(wpa_s->l2);
1246                 wpa_s->l2 = NULL;
1247 #ifdef CONFIG_TERMINATE_ONLASTIF
1248                 /* check if last interface */
1249                 if (!any_interfaces(wpa_s->global->ifaces))
1250                         eloop_terminate();
1251 #endif /* CONFIG_TERMINATE_ONLASTIF */
1252                 break;
1253         }
1254 }
1255
1256
1257 #ifdef CONFIG_PEERKEY
1258 static void
1259 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1260                               union wpa_event_data *data)
1261 {
1262         if (data == NULL)
1263                 return;
1264         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1265 }
1266 #endif /* CONFIG_PEERKEY */
1267
1268
1269 #ifdef CONFIG_IEEE80211R
1270 static void
1271 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1272                                  union wpa_event_data *data)
1273 {
1274         if (data == NULL)
1275                 return;
1276
1277         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1278                                     data->ft_ies.ies_len,
1279                                     data->ft_ies.ft_action,
1280                                     data->ft_ies.target_ap,
1281                                     data->ft_ies.ric_ies,
1282                                     data->ft_ies.ric_ies_len) < 0) {
1283                 /* TODO: prevent MLME/driver from trying to associate? */
1284         }
1285 }
1286 #endif /* CONFIG_IEEE80211R */
1287
1288
1289 #ifdef CONFIG_IBSS_RSN
1290 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1291                                                 union wpa_event_data *data)
1292 {
1293         if (data == NULL)
1294                 return;
1295         ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1296 }
1297 #endif /* CONFIG_IBSS_RSN */
1298
1299
1300 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1301                           union wpa_event_data *data)
1302 {
1303         struct wpa_supplicant *wpa_s = ctx;
1304
1305         switch (event) {
1306         case EVENT_AUTH:
1307                 sme_event_auth(wpa_s, data);
1308                 break;
1309         case EVENT_ASSOC:
1310                 wpa_supplicant_event_assoc(wpa_s, data);
1311                 break;
1312         case EVENT_DEAUTH:
1313         case EVENT_DISASSOC:
1314                 wpa_supplicant_event_disassoc(wpa_s);
1315                 break;
1316         case EVENT_MICHAEL_MIC_FAILURE:
1317                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1318                 break;
1319 #ifndef CONFIG_NO_SCAN_PROCESSING
1320         case EVENT_SCAN_RESULTS:
1321                 wpa_supplicant_event_scan_results(wpa_s);
1322                 break;
1323 #endif /* CONFIG_NO_SCAN_PROCESSING */
1324         case EVENT_ASSOCINFO:
1325                 wpa_supplicant_event_associnfo(wpa_s, data);
1326                 break;
1327         case EVENT_INTERFACE_STATUS:
1328                 wpa_supplicant_event_interface_status(wpa_s, data);
1329                 break;
1330         case EVENT_PMKID_CANDIDATE:
1331                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1332                 break;
1333 #ifdef CONFIG_PEERKEY
1334         case EVENT_STKSTART:
1335                 wpa_supplicant_event_stkstart(wpa_s, data);
1336                 break;
1337 #endif /* CONFIG_PEERKEY */
1338 #ifdef CONFIG_IEEE80211R
1339         case EVENT_FT_RESPONSE:
1340                 wpa_supplicant_event_ft_response(wpa_s, data);
1341                 break;
1342 #endif /* CONFIG_IEEE80211R */
1343 #ifdef CONFIG_IBSS_RSN
1344         case EVENT_IBSS_RSN_START:
1345                 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1346                 break;
1347 #endif /* CONFIG_IBSS_RSN */
1348         case EVENT_ASSOC_REJECT:
1349                 sme_event_assoc_reject(wpa_s, data);
1350                 break;
1351         case EVENT_AUTH_TIMED_OUT:
1352                 sme_event_auth_timed_out(wpa_s, data);
1353                 break;
1354         case EVENT_ASSOC_TIMED_OUT:
1355                 sme_event_assoc_timed_out(wpa_s, data);
1356                 break;
1357         default:
1358                 wpa_printf(MSG_INFO, "Unknown event %d", event);
1359                 break;
1360         }
1361 }