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