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 "ap/hostapd.h"
  31 #include "notify.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "blacklist.h"
  34 #include "wpas_glue.h"
  35 #include "wps_supplicant.h"
  36 #include "ibss_rsn.h"
  37 #include "sme.h"
  38 #include "bgscan.h"
  39 #include "ap.h"
  40 #include "bss.h"
  41 #include "mlme.h"
  42 #include "scan.h"
  43
  44
  45 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  46 {
  47         struct wpa_ssid *ssid, *old_ssid;
  48
  49         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  50                 return 0;
  51
  52         wpa_printf(MSG_DEBUG, "Select network based on association "
  53                    "information");
  54         ssid = wpa_supplicant_get_ssid(wpa_s);
  55         if (ssid == NULL) {
  56                 wpa_printf(MSG_INFO, "No network configuration found for the "
  57                            "current AP");
  58                 return -1;
  59         }
  60
  61         if (ssid->disabled) {
  62                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  63                 return -1;
  64         }
  65
  66         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  67                    "AP");
  68         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  69                               WPA_KEY_MGMT_WPA_NONE |
  70                               WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
  71                               WPA_KEY_MGMT_PSK_SHA256 |
  72                               WPA_KEY_MGMT_IEEE8021X_SHA256)) {
  73                 u8 wpa_ie[80];
  74                 size_t wpa_ie_len = sizeof(wpa_ie);
  75                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  76                                           wpa_ie, &wpa_ie_len);
  77         } else {
  78                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  79         }
  80
  81         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  82                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  83         old_ssid = wpa_s->current_ssid;
  84         wpa_s->current_ssid = ssid;
  85         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  86         wpa_supplicant_initiate_eapol(wpa_s);
  87         if (old_ssid != wpa_s->current_ssid)
  88                 wpas_notify_network_changed(wpa_s);
  89
  90         return 0;
  91 }
  92
  93
  94 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  95                                                 void *sock_ctx)
  96 {
  97         struct wpa_supplicant *wpa_s = eloop_ctx;
  98
  99         if (wpa_s->countermeasures) {
 100                 wpa_s->countermeasures = 0;
 101                 wpa_drv_set_countermeasures(wpa_s, 0);
 102                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
 103                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 104         }
 105 }
 106
 107
 108 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 109 {
 110         int bssid_changed;
 111
 112         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 113         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 114         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 115         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 116         if (bssid_changed)
 117                 wpas_notify_bssid_changed(wpa_s);
 118
 119         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 120         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 121         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 122                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 123         wpa_s->ap_ies_from_associnfo = 0;
 124 }
 125
 126
 127 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 128 {
 129         struct wpa_ie_data ie;
 130         int pmksa_set = -1;
 131         size_t i;
 132
 133         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 134             ie.pmkid == NULL)
 135                 return;
 136
 137         for (i = 0; i < ie.num_pmkid; i++) {
 138                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 139                                                     ie.pmkid + i * PMKID_LEN,
 140                                                     NULL, NULL, 0);
 141                 if (pmksa_set == 0) {
 142                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 143                         break;
 144                 }
 145         }
 146
 147         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 148                    "cache", pmksa_set == 0 ? "" : "not ");
 149 }
 150
 151
 152 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 153                                                  union wpa_event_data *data)
 154 {
 155         if (data == NULL) {
 156                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 157                 return;
 158         }
 159         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 160                    " index=%d preauth=%d",
 161                    MAC2STR(data->pmkid_candidate.bssid),
 162                    data->pmkid_candidate.index,
 163                    data->pmkid_candidate.preauth);
 164
 165         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 166                             data->pmkid_candidate.index,
 167                             data->pmkid_candidate.preauth);
 168 }
 169
 170
 171 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 172 {
 173         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 174             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 175                 return 0;
 176
 177 #ifdef IEEE8021X_EAPOL
 178         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 179             wpa_s->current_ssid &&
 180             !(wpa_s->current_ssid->eapol_flags &
 181               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 182                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 183                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 184                  * plaintext or static WEP keys). */
 185                 return 0;
 186         }
 187 #endif /* IEEE8021X_EAPOL */
 188
 189         return 1;
 190 }
 191
 192
 193 /**
 194  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 195  * @wpa_s: pointer to wpa_supplicant data
 196  * @ssid: Configuration data for the network
 197  * Returns: 0 on success, -1 on failure
 198  *
 199  * This function is called when starting authentication with a network that is
 200  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 201  */
 202 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 203                               struct wpa_ssid *ssid)
 204 {
 205 #ifdef IEEE8021X_EAPOL
 206         int aka = 0, sim = 0, type;
 207
 208         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 209                 return 0;
 210
 211         if (ssid->eap.eap_methods == NULL) {
 212                 sim = 1;
 213                 aka = 1;
 214         } else {
 215                 struct eap_method_type *eap = ssid->eap.eap_methods;
 216                 while (eap->vendor != EAP_VENDOR_IETF ||
 217                        eap->method != EAP_TYPE_NONE) {
 218                         if (eap->vendor == EAP_VENDOR_IETF) {
 219                                 if (eap->method == EAP_TYPE_SIM)
 220                                         sim = 1;
 221                                 else if (eap->method == EAP_TYPE_AKA)
 222                                         aka = 1;
 223                         }
 224                         eap++;
 225                 }
 226         }
 227
 228         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 229                 sim = 0;
 230         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 231                 aka = 0;
 232
 233         if (!sim && !aka) {
 234                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 235                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 236                 return 0;
 237         }
 238
 239         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 240                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 241         if (sim && aka)
 242                 type = SCARD_TRY_BOTH;
 243         else if (aka)
 244                 type = SCARD_USIM_ONLY;
 245         else
 246                 type = SCARD_GSM_SIM_ONLY;
 247
 248         wpa_s->scard = scard_init(type);
 249         if (wpa_s->scard == NULL) {
 250                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 251                            "(pcsc-lite)");
 252                 return -1;
 253         }
 254         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 255         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 256 #endif /* IEEE8021X_EAPOL */
 257
 258         return 0;
 259 }
 260
 261
 262 #ifndef CONFIG_NO_SCAN_PROCESSING
 263 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 264                                         struct wpa_ssid *ssid)
 265 {
 266         int i, privacy = 0;
 267
 268         if (ssid->mixed_cell)
 269                 return 1;
 270
 271 #ifdef CONFIG_WPS
 272         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 273                 return 1;
 274 #endif /* CONFIG_WPS */
 275
 276         for (i = 0; i < NUM_WEP_KEYS; i++) {
 277                 if (ssid->wep_key_len[i]) {
 278                         privacy = 1;
 279                         break;
 280                 }
 281         }
 282 #ifdef IEEE8021X_EAPOL
 283         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 284             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 285                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 286                 privacy = 1;
 287 #endif /* IEEE8021X_EAPOL */
 288
 289         if (bss->caps & IEEE80211_CAP_PRIVACY)
 290                 return privacy;
 291         return !privacy;
 292 }
 293
 294
 295 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
 296                                          struct wpa_ssid *ssid,
 297                                          struct wpa_scan_res *bss)
 298 {
 299         struct wpa_ie_data ie;
 300         int proto_match = 0;
 301         const u8 *rsn_ie, *wpa_ie;
 302         int ret;
 303
 304         ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
 305         if (ret >= 0)
 306                 return ret;
 307
 308         rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 309         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 310                 proto_match++;
 311
 312                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 313                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 314                         break;
 315                 }
 316                 if (!(ie.proto & ssid->proto)) {
 317                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 318                                    "mismatch");
 319                         break;
 320                 }
 321
 322                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 323                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 324                                    "mismatch");
 325                         break;
 326                 }
 327
 328                 if (!(ie.group_cipher & ssid->group_cipher)) {
 329                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 330                                    "mismatch");
 331                         break;
 332                 }
 333
 334                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 335                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 336                                    "mismatch");
 337                         break;
 338                 }
 339
 340 #ifdef CONFIG_IEEE80211W
 341                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 342                     ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
 343                         wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 344                                    "protection");
 345                         break;
 346                 }
 347 #endif /* CONFIG_IEEE80211W */
 348
 349                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 350                 return 1;
 351         }
 352
 353         wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 354         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 355                 proto_match++;
 356
 357                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 358                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 359                         break;
 360                 }
 361                 if (!(ie.proto & ssid->proto)) {
 362                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 363                                    "mismatch");
 364                         break;
 365                 }
 366
 367                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 368                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 369                                    "mismatch");
 370                         break;
 371                 }
 372
 373                 if (!(ie.group_cipher & ssid->group_cipher)) {
 374                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 375                                    "mismatch");
 376                         break;
 377                 }
 378
 379                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 380                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 381                                    "mismatch");
 382                         break;
 383                 }
 384
 385                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 386                 return 1;
 387         }
 388
 389         if (proto_match == 0)
 390                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 391
 392         return 0;
 393 }
 394
 395
 396 static struct wpa_bss *
 397 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
 398                               struct wpa_scan_results *scan_res,
 399                               struct wpa_ssid *group,
 400                               struct wpa_ssid **selected_ssid)
 401 {
 402         struct wpa_ssid *ssid;
 403         struct wpa_scan_res *bss;
 404         size_t i;
 405         struct wpa_blacklist *e;
 406         const u8 *ie;
 407
 408         wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 409         for (i = 0; i < scan_res->num; i++) {
 410                 const u8 *ssid_;
 411                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 412                 bss = scan_res->res[i];
 413
 414                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 415                 ssid_ = ie ? ie + 2 : (u8 *) "";
 416                 ssid_len = ie ? ie[1] : 0;
 417
 418                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 419                 wpa_ie_len = ie ? ie[1] : 0;
 420
 421                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 422                 rsn_ie_len = ie ? ie[1] : 0;
 423
 424                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 425                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 426                            (int) i, MAC2STR(bss->bssid),
 427                            wpa_ssid_txt(ssid_, ssid_len),
 428                            wpa_ie_len, rsn_ie_len, bss->caps);
 429
 430                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 431                 if (e && e->count > 1) {
 432                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 433                         continue;
 434                 }
 435
 436                 if (ssid_len == 0) {
 437                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 438                         continue;
 439                 }
 440
 441                 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
 442                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 443                         continue;
 444                 }
 445
 446                 for (ssid = group; ssid; ssid = ssid->pnext) {
 447                         int check_ssid = 1;
 448
 449                         if (ssid->disabled) {
 450                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 451                                 continue;
 452                         }
 453
 454 #ifdef CONFIG_WPS
 455                         if (ssid->ssid_len == 0 &&
 456                             wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 457                                 check_ssid = 0;
 458 #endif /* CONFIG_WPS */
 459
 460                         if (check_ssid &&
 461                             (ssid_len != ssid->ssid_len ||
 462                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 463                                 wpa_printf(MSG_DEBUG, "   skip - "
 464                                            "SSID mismatch");
 465                                 continue;
 466                         }
 467
 468                         if (ssid->bssid_set &&
 469                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 470                         {
 471                                 wpa_printf(MSG_DEBUG, "   skip - "
 472                                            "BSSID mismatch");
 473                                 continue;
 474                         }
 475
 476                         if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
 477                                 continue;
 478
 479                         wpa_printf(MSG_DEBUG, "   selected WPA AP "
 480                                    MACSTR " ssid='%s'",
 481                                    MAC2STR(bss->bssid),
 482                                    wpa_ssid_txt(ssid_, ssid_len));
 483                         *selected_ssid = ssid;
 484                         return wpa_bss_get(wpa_s, bss->bssid, ssid_, ssid_len);
 485                 }
 486         }
 487
 488         return NULL;
 489 }
 490
 491
 492 static struct wpa_bss *
 493 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
 494                                   struct wpa_scan_results *scan_res,
 495                                   struct wpa_ssid *group,
 496                                   struct wpa_ssid **selected_ssid)
 497 {
 498         struct wpa_ssid *ssid;
 499         struct wpa_scan_res *bss;
 500         size_t i;
 501         struct wpa_blacklist *e;
 502         const u8 *ie;
 503
 504         wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 505         for (i = 0; i < scan_res->num; i++) {
 506                 const u8 *ssid_;
 507                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 508                 bss = scan_res->res[i];
 509
 510                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 511                 ssid_ = ie ? ie + 2 : (u8 *) "";
 512                 ssid_len = ie ? ie[1] : 0;
 513
 514                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 515                 wpa_ie_len = ie ? ie[1] : 0;
 516
 517                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 518                 rsn_ie_len = ie ? ie[1] : 0;
 519
 520                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 521                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 522                            (int) i, MAC2STR(bss->bssid),
 523                            wpa_ssid_txt(ssid_, ssid_len),
 524                            wpa_ie_len, rsn_ie_len, bss->caps);
 525
 526                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 527                 if (e && e->count > 1) {
 528                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 529                         continue;
 530                 }
 531
 532                 if (ssid_len == 0) {
 533                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 534                         continue;
 535                 }
 536
 537                 for (ssid = group; ssid; ssid = ssid->pnext) {
 538                         int check_ssid = ssid->ssid_len != 0;
 539
 540                         if (ssid->disabled) {
 541                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 542                                 continue;
 543                         }
 544
 545 #ifdef CONFIG_WPS
 546                         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 547                                 /* Only allow wildcard SSID match if an AP
 548                                  * advertises active WPS operation that matches
 549                                  * with our mode. */
 550                                 check_ssid = 1;
 551                                 if (ssid->ssid_len == 0 &&
 552                                     wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
 553                                                               bss))
 554                                         check_ssid = 0;
 555                         }
 556 #endif /* CONFIG_WPS */
 557
 558                         if (check_ssid &&
 559                             (ssid_len != ssid->ssid_len ||
 560                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 561                                 wpa_printf(MSG_DEBUG, "   skip - "
 562                                            "SSID mismatch");
 563                                 continue;
 564                         }
 565
 566                         if (ssid->bssid_set &&
 567                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 568                         {
 569                                 wpa_printf(MSG_DEBUG, "   skip - "
 570                                            "BSSID mismatch");
 571                                 continue;
 572                         }
 573
 574                         if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 575                             !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
 576                             !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 577                         {
 578                                 wpa_printf(MSG_DEBUG, "   skip - "
 579                                            "non-WPA network not allowed");
 580                                 continue;
 581                         }
 582
 583                         if ((ssid->key_mgmt &
 584                              (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 585                               WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
 586                               WPA_KEY_MGMT_IEEE8021X_SHA256 |
 587                               WPA_KEY_MGMT_PSK_SHA256)) &&
 588                             (wpa_ie_len != 0 || rsn_ie_len != 0)) {
 589                                 wpa_printf(MSG_DEBUG, "   skip - "
 590                                            "WPA network");
 591                                 continue;
 592                         }
 593
 594                         if (!wpa_supplicant_match_privacy(bss, ssid)) {
 595                                 wpa_printf(MSG_DEBUG, "   skip - "
 596                                            "privacy mismatch");
 597                                 continue;
 598                         }
 599
 600                         if (bss->caps & IEEE80211_CAP_IBSS) {
 601                                 wpa_printf(MSG_DEBUG, "   skip - "
 602                                            "IBSS (adhoc) network");
 603                                 continue;
 604                         }
 605
 606                         wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 607                                    MACSTR " ssid='%s'",
 608                                    MAC2STR(bss->bssid),
 609                                    wpa_ssid_txt(ssid_, ssid_len));
 610                         *selected_ssid = ssid;
 611                         return wpa_bss_get(wpa_s, bss->bssid, ssid_, ssid_len);
 612                 }
 613         }
 614
 615         return NULL;
 616 }
 617
 618
 619 static struct wpa_bss *
 620 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
 621                           struct wpa_scan_results *scan_res,
 622                           struct wpa_ssid *group,
 623                           struct wpa_ssid **selected_ssid)
 624 {
 625         struct wpa_bss *selected;
 626
 627         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 628                    group->priority);
 629
 630         /* First, try to find WPA-enabled AP */
 631         selected = wpa_supplicant_select_bss_wpa(wpa_s, scan_res, group,
 632                                                  selected_ssid);
 633         if (selected)
 634                 return selected;
 635
 636         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 637          * allows this. */
 638         return wpa_supplicant_select_bss_non_wpa(wpa_s, scan_res, group,
 639                                                  selected_ssid);
 640 }
 641
 642
 643 static struct wpa_bss *
 644 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 645                             struct wpa_scan_results *scan_res,
 646                             struct wpa_ssid **selected_ssid)
 647 {
 648         struct wpa_bss *selected = NULL;
 649         int prio;
 650
 651         while (selected == NULL) {
 652                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 653                         selected = wpa_supplicant_select_bss(
 654                                 wpa_s, scan_res, wpa_s->conf->pssid[prio],
 655                                 selected_ssid);
 656                         if (selected)
 657                                 break;
 658                 }
 659
 660                 if (selected == NULL && wpa_s->blacklist) {
 661                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 662                                    "and try again");
 663                         wpa_blacklist_clear(wpa_s);
 664                         wpa_s->blacklist_cleared++;
 665                 } else if (selected == NULL)
 666                         break;
 667         }
 668
 669         return selected;
 670 }
 671
 672
 673 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
 674                                         int timeout)
 675 {
 676         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 677                 /*
 678                  * Quick recovery if the initial scan results were not
 679                  * complete when fetched before the first scan request.
 680                  */
 681                 wpa_s->scan_res_tried++;
 682                 timeout = 0;
 683         } else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
 684                 /*
 685                  * No networks are enabled; short-circuit request so
 686                  * we don't wait timeout seconds before transitioning
 687                  * to INACTIVE state.
 688                  */
 689                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
 690                 return;
 691         }
 692         wpa_supplicant_req_scan(wpa_s, timeout, 0);
 693 }
 694
 695
 696 static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 697                                    struct wpa_bss *selected,
 698                                    struct wpa_ssid *ssid)
 699 {
 700         if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
 701                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
 702                         "PBC session overlap");
 703                 wpa_supplicant_req_new_scan(wpa_s, 10);
 704                 return;
 705         }
 706
 707         /*
 708          * Do not trigger new association unless the BSSID has changed or if
 709          * reassociation is requested. If we are in process of associating with
 710          * the selected BSSID, do not trigger new attempt.
 711          */
 712         if (wpa_s->reassociate ||
 713             (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 714              (wpa_s->wpa_state != WPA_ASSOCIATING ||
 715               os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
 716               0))) {
 717                 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 718                         wpa_supplicant_req_new_scan(wpa_s, 10);
 719                         return;
 720                 }
 721                 wpa_supplicant_associate(wpa_s, selected, ssid);
 722         } else {
 723                 wpa_printf(MSG_DEBUG, "Already associated with the selected "
 724                            "AP");
 725         }
 726 }
 727
 728
 729 static struct wpa_ssid *
 730 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
 731 {
 732         int prio;
 733         struct wpa_ssid *ssid;
 734
 735         for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 736                 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
 737                 {
 738                         if (ssid->disabled)
 739                                 continue;
 740                         if (ssid->mode == IEEE80211_MODE_IBSS ||
 741                             ssid->mode == IEEE80211_MODE_AP)
 742                                 return ssid;
 743                 }
 744         }
 745         return NULL;
 746 }
 747
 748
 749 /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
 750  * on BSS added and BSS changed events */
 751 static void wpa_supplicant_rsn_preauth_scan_results(
 752         struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res)
 753 {
 754         int i;
 755
 756         if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
 757                 return;
 758
 759         for (i = scan_res->num - 1; i >= 0; i--) {
 760                 const u8 *ssid, *rsn;
 761                 struct wpa_scan_res *r;
 762
 763                 r = scan_res->res[i];
 764
 765                 ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
 766                 if (ssid == NULL)
 767                         continue;
 768
 769                 rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
 770                 if (rsn == NULL)
 771                         continue;
 772
 773                 rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
 774         }
 775
 776 }
 777
 778
 779 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 780                                               union wpa_event_data *data)
 781 {
 782         struct wpa_bss *selected;
 783         struct wpa_ssid *ssid = NULL;
 784         struct wpa_scan_results *scan_res;
 785
 786         wpa_supplicant_notify_scanning(wpa_s, 0);
 787
 788         scan_res = wpa_supplicant_get_scan_results(wpa_s,
 789                                                    data ? &data->scan_info :
 790                                                    NULL, 1);
 791         if (scan_res == NULL) {
 792                 if (wpa_s->conf->ap_scan == 2)
 793                         return;
 794                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 795                            "scanning again");
 796                 wpa_supplicant_req_new_scan(wpa_s, 1);
 797                 return;
 798         }
 799
 800         /*
 801          * Don't post the results if this was the initial cached
 802          * and there were no results.
 803          */
 804         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
 805             scan_res->num == 0) {
 806                 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
 807                         "empty - not posting");
 808         } else {
 809                 wpa_printf(MSG_DEBUG, "New scan results available");
 810                 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
 811                 wpas_notify_scan_results(wpa_s);
 812         }
 813
 814         wpas_notify_scan_done(wpa_s, 1);
 815
 816         if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
 817                 wpa_scan_results_free(scan_res);
 818                 return;
 819         }
 820
 821         if (wpa_s->disconnected) {
 822                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 823                 wpa_scan_results_free(scan_res);
 824                 return;
 825         }
 826
 827         if (bgscan_notify_scan(wpa_s) == 1) {
 828                 wpa_scan_results_free(scan_res);
 829                 return;
 830         }
 831
 832         wpa_supplicant_rsn_preauth_scan_results(wpa_s, scan_res);
 833
 834         selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
 835         wpa_scan_results_free(scan_res);
 836
 837         if (selected) {
 838                 wpa_supplicant_connect(wpa_s, selected, ssid);
 839         } else {
 840                 wpa_printf(MSG_DEBUG, "No suitable network found");
 841                 ssid = wpa_supplicant_pick_new_network(wpa_s);
 842                 if (ssid) {
 843                         wpa_printf(MSG_DEBUG, "Setup a new network");
 844                         wpa_supplicant_associate(wpa_s, NULL, ssid);
 845                 } else
 846                         wpa_supplicant_req_new_scan(wpa_s, 5);
 847         }
 848 }
 849 #endif /* CONFIG_NO_SCAN_PROCESSING */
 850
 851
 852 #ifdef CONFIG_IEEE80211R
 853 static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
 854                                     const u8 *ftie, const u8 *mdie)
 855 {
 856         const u8 *mobility_domain = NULL;
 857         const u8 *r0kh_id = NULL;
 858         size_t r0kh_id_len = 0;
 859         const u8 *r1kh_id = NULL;
 860         struct rsn_ftie *hdr;
 861         const u8 *pos, *end;
 862
 863         if (mdie == NULL || ftie == NULL)
 864                 return;
 865
 866         if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
 867                 mobility_domain = mdie + 2;
 868 #ifdef CONFIG_SME
 869                 wpa_s->sme.ft_used = 1;
 870                 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
 871 #endif /* CONFIG_SME */
 872         }
 873         if (ftie[1] >= sizeof(struct rsn_ftie)) {
 874                 end = ftie + 2 + ftie[1];
 875                 hdr = (struct rsn_ftie *) (ftie + 2);
 876                 pos = (const u8 *) (hdr + 1);
 877                 while (pos + 1 < end) {
 878                         if (pos + 2 + pos[1] > end)
 879                                 break;
 880                         if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
 881                             pos[1] == FT_R1KH_ID_LEN)
 882                                 r1kh_id = pos + 2;
 883                         else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
 884                                  pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
 885                                 r0kh_id = pos + 2;
 886                                 r0kh_id_len = pos[1];
 887                         }
 888                         pos += 2 + pos[1];
 889                 }
 890         }
 891         wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
 892                              r0kh_id_len, r1kh_id);
 893 }
 894 #endif /* CONFIG_IEEE80211R */
 895
 896 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 897                                            union wpa_event_data *data)
 898 {
 899         int l, len, found = 0, wpa_found, rsn_found;
 900         const u8 *p;
 901 #ifdef CONFIG_IEEE80211R
 902         const u8 *mdie = NULL, *ftie = NULL;
 903 #endif /* CONFIG_IEEE80211R */
 904
 905         wpa_printf(MSG_DEBUG, "Association info event");
 906         if (data->assoc_info.req_ies)
 907                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 908                             data->assoc_info.req_ies_len);
 909         if (data->assoc_info.resp_ies)
 910                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 911                             data->assoc_info.resp_ies_len);
 912         if (data->assoc_info.beacon_ies)
 913                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 914                             data->assoc_info.beacon_ies,
 915                             data->assoc_info.beacon_ies_len);
 916         if (data->assoc_info.freq)
 917                 wpa_printf(MSG_DEBUG, "freq=%u MHz", data->assoc_info.freq);
 918
 919         p = data->assoc_info.req_ies;
 920         l = data->assoc_info.req_ies_len;
 921
 922         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 923         while (p && l >= 2) {
 924                 len = p[1] + 2;
 925                 if (len > l) {
 926                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 927                                     p, l);
 928                         break;
 929                 }
 930                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 931                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 932                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
 933                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 934                                 break;
 935                         found = 1;
 936                         wpa_find_assoc_pmkid(wpa_s);
 937                         break;
 938                 }
 939                 l -= len;
 940                 p += len;
 941         }
 942         if (!found && data->assoc_info.req_ies)
 943                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 944
 945 #ifdef CONFIG_IEEE80211R
 946         p = data->assoc_info.resp_ies;
 947         l = data->assoc_info.resp_ies_len;
 948
 949         /* Go through the IEs and make a copy of the FT/MD IE, if present. */
 950         while (p && l >= 2) {
 951                 len = p[1] + 2;
 952                 if (len > l) {
 953                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 954                                     p, l);
 955                         break;
 956                 }
 957                 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
 958                         ftie = p;
 959                 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
 960                         mdie = p;
 961                 l -= len;
 962                 p += len;
 963         }
 964
 965         wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
 966 #endif /* CONFIG_IEEE80211R */
 967
 968         /* WPA/RSN IE from Beacon/ProbeResp */
 969         p = data->assoc_info.beacon_ies;
 970         l = data->assoc_info.beacon_ies_len;
 971
 972         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 973          */
 974         wpa_found = rsn_found = 0;
 975         while (p && l >= 2) {
 976                 len = p[1] + 2;
 977                 if (len > l) {
 978                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 979                                     p, l);
 980                         break;
 981                 }
 982                 if (!wpa_found &&
 983                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 984                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 985                         wpa_found = 1;
 986                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 987                 }
 988
 989                 if (!rsn_found &&
 990                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
 991                         rsn_found = 1;
 992                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 993                 }
 994
 995                 l -= len;
 996                 p += len;
 997         }
 998
 999         if (!wpa_found && data->assoc_info.beacon_ies)
1000                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
1001         if (!rsn_found && data->assoc_info.beacon_ies)
1002                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
1003         if (wpa_found || rsn_found)
1004                 wpa_s->ap_ies_from_associnfo = 1;
1005
1006         wpa_s->assoc_freq = data->assoc_info.freq;
1007 }
1008
1009
1010 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
1011                                        union wpa_event_data *data)
1012 {
1013         u8 bssid[ETH_ALEN];
1014         int ft_completed;
1015         int bssid_changed;
1016         struct wpa_driver_capa capa;
1017
1018 #ifdef CONFIG_AP
1019         if (wpa_s->ap_iface) {
1020                 hostapd_notif_assoc(wpa_s->ap_iface->bss[0],
1021                                     data->assoc_info.addr,
1022                                     data->assoc_info.req_ies,
1023                                     data->assoc_info.req_ies_len);
1024                 return;
1025         }
1026 #endif /* CONFIG_AP */
1027
1028         ft_completed = wpa_ft_is_completed(wpa_s->wpa);
1029         if (data)
1030                 wpa_supplicant_event_associnfo(wpa_s, data);
1031
1032         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
1033         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
1034                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
1035         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
1036             (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
1037              os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
1038                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
1039                         MACSTR, MAC2STR(bssid));
1040                 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1041                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1042                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1043                 if (bssid_changed)
1044                         wpas_notify_bssid_changed(wpa_s);
1045
1046                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1047                         wpa_clear_keys(wpa_s, bssid);
1048                 }
1049                 if (wpa_supplicant_select_config(wpa_s) < 0) {
1050                         wpa_supplicant_disassociate(
1051                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1052                         return;
1053                 }
1054                 if (wpa_s->current_ssid) {
1055                         struct wpa_bss *bss = NULL;
1056                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1057                         if (ssid->ssid_len > 0)
1058                                 bss = wpa_bss_get(wpa_s, bssid,
1059                                                   ssid->ssid, ssid->ssid_len);
1060                         if (!bss)
1061                                 bss = wpa_bss_get_bssid(wpa_s, bssid);
1062                         if (bss)
1063                                 wpa_s->current_bss = bss;
1064                 }
1065         }
1066
1067 #ifdef CONFIG_SME
1068         os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1069         wpa_s->sme.prev_bssid_set = 1;
1070 #endif /* CONFIG_SME */
1071
1072         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1073         if (wpa_s->current_ssid) {
1074                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1075                  * initialized before association, but for other modes,
1076                  * initialize PC/SC here, if the current configuration needs
1077                  * smartcard or SIM/USIM. */
1078                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1079         }
1080         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1081         l2_packet_notify_auth_start(wpa_s->l2);
1082
1083         /*
1084          * Set portEnabled first to FALSE in order to get EAP state machine out
1085          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1086          * state machine may transit to AUTHENTICATING state based on obsolete
1087          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1088          * AUTHENTICATED without ever giving chance to EAP state machine to
1089          * reset the state.
1090          */
1091         if (!ft_completed) {
1092                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1093                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1094         }
1095         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1096                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1097         /* 802.1X::portControl = Auto */
1098         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1099         wpa_s->eapol_received = 0;
1100         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1101             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1102             (wpa_s->current_ssid &&
1103              wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1104                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1105                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1106         } else if (!ft_completed) {
1107                 /* Timeout for receiving the first EAPOL packet */
1108                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1109         }
1110         wpa_supplicant_cancel_scan(wpa_s);
1111
1112         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1113             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1114                 /*
1115                  * We are done; the driver will take care of RSN 4-way
1116                  * handshake.
1117                  */
1118                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1119                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1120                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1121                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1122         }
1123
1124         if (wpa_s->pending_eapol_rx) {
1125                 struct os_time now, age;
1126                 os_get_time(&now);
1127                 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1128                 if (age.sec == 0 && age.usec < 100000 &&
1129                     os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1130                     0) {
1131                         wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1132                                    "that was received just before association "
1133                                    "notification");
1134                         wpa_supplicant_rx_eapol(
1135                                 wpa_s, wpa_s->pending_eapol_rx_src,
1136                                 wpabuf_head(wpa_s->pending_eapol_rx),
1137                                 wpabuf_len(wpa_s->pending_eapol_rx));
1138                 }
1139                 wpabuf_free(wpa_s->pending_eapol_rx);
1140                 wpa_s->pending_eapol_rx = NULL;
1141         }
1142
1143 #ifdef CONFIG_BGSCAN
1144         if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1145                 bgscan_deinit(wpa_s);
1146                 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1147                         if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1148                                 wpa_printf(MSG_DEBUG, "Failed to initialize "
1149                                            "bgscan");
1150                                 /*
1151                                  * Live without bgscan; it is only used as a
1152                                  * roaming optimization, so the initial
1153                                  * connection is not affected.
1154                                  */
1155                         } else
1156                                 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1157                 } else
1158                         wpa_s->bgscan_ssid = NULL;
1159         }
1160 #endif /* CONFIG_BGSCAN */
1161
1162         if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1163              wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1164             wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1165             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1166                 /* Set static WEP keys again */
1167                 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1168         }
1169 }
1170
1171
1172 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1173 {
1174         const u8 *bssid;
1175 #ifdef CONFIG_SME
1176         int authenticating;
1177         u8 prev_pending_bssid[ETH_ALEN];
1178
1179         authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1180         os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1181 #endif /* CONFIG_SME */
1182
1183         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1184                 /*
1185                  * At least Host AP driver and a Prism3 card seemed to be
1186                  * generating streams of disconnected events when configuring
1187                  * IBSS for WPA-None. Ignore them for now.
1188                  */
1189                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1190                            "IBSS/WPA-None mode");
1191                 return;
1192         }
1193
1194         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1195             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1196                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1197                         "pre-shared key may be incorrect");
1198         }
1199         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1200                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1201         bssid = wpa_s->bssid;
1202         if (is_zero_ether_addr(bssid))
1203                 bssid = wpa_s->pending_bssid;
1204         wpa_blacklist_add(wpa_s, bssid);
1205         wpa_sm_notify_disassoc(wpa_s->wpa);
1206         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1207                 "remove keys");
1208         if (wpa_supplicant_dynamic_keys(wpa_s)) {
1209                 wpa_s->keys_cleared = 0;
1210                 wpa_clear_keys(wpa_s, wpa_s->bssid);
1211         }
1212         wpa_supplicant_mark_disassoc(wpa_s);
1213         bgscan_deinit(wpa_s);
1214 #ifdef CONFIG_SME
1215         if (authenticating &&
1216             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
1217                 /*
1218                  * mac80211-workaround to force deauth on failed auth cmd,
1219                  * requires us to remain in authenticating state to allow the
1220                  * second authentication attempt to be continued properly.
1221                  */
1222                 wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
1223                            "proceed after disconnection event");
1224                 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1225                 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1226         }
1227 #endif /* CONFIG_SME */
1228 }
1229
1230
1231 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1232 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1233                                                     void *sock_ctx)
1234 {
1235         struct wpa_supplicant *wpa_s = eloop_ctx;
1236
1237         if (!wpa_s->pending_mic_error_report)
1238                 return;
1239
1240         wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1241         wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1242         wpa_s->pending_mic_error_report = 0;
1243 }
1244 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1245
1246
1247 static void
1248 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1249                                          union wpa_event_data *data)
1250 {
1251         int pairwise;
1252         struct os_time t;
1253
1254         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1255         pairwise = (data && data->michael_mic_failure.unicast);
1256         os_get_time(&t);
1257         if ((wpa_s->last_michael_mic_error &&
1258              t.sec - wpa_s->last_michael_mic_error <= 60) ||
1259             wpa_s->pending_mic_error_report) {
1260                 if (wpa_s->pending_mic_error_report) {
1261                         /*
1262                          * Send the pending MIC error report immediately since
1263                          * we are going to start countermeasures and AP better
1264                          * do the same.
1265                          */
1266                         wpa_sm_key_request(wpa_s->wpa, 1,
1267                                            wpa_s->pending_mic_error_pairwise);
1268                 }
1269
1270                 /* Send the new MIC error report immediately since we are going
1271                  * to start countermeasures and AP better do the same.
1272                  */
1273                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1274
1275                 /* initialize countermeasures */
1276                 wpa_s->countermeasures = 1;
1277                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1278
1279                 /*
1280                  * Need to wait for completion of request frame. We do not get
1281                  * any callback for the message completion, so just wait a
1282                  * short while and hope for the best. */
1283                 os_sleep(0, 10000);
1284
1285                 wpa_drv_set_countermeasures(wpa_s, 1);
1286                 wpa_supplicant_deauthenticate(wpa_s,
1287                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
1288                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1289                                      wpa_s, NULL);
1290                 eloop_register_timeout(60, 0,
1291                                        wpa_supplicant_stop_countermeasures,
1292                                        wpa_s, NULL);
1293                 /* TODO: mark the AP rejected for 60 second. STA is
1294                  * allowed to associate with another AP.. */
1295         } else {
1296 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1297                 if (wpa_s->mic_errors_seen) {
1298                         /*
1299                          * Reduce the effectiveness of Michael MIC error
1300                          * reports as a means for attacking against TKIP if
1301                          * more than one MIC failure is noticed with the same
1302                          * PTK. We delay the transmission of the reports by a
1303                          * random time between 0 and 60 seconds in order to
1304                          * force the attacker wait 60 seconds before getting
1305                          * the information on whether a frame resulted in a MIC
1306                          * failure.
1307                          */
1308                         u8 rval[4];
1309                         int sec;
1310
1311                         if (os_get_random(rval, sizeof(rval)) < 0)
1312                                 sec = os_random() % 60;
1313                         else
1314                                 sec = WPA_GET_BE32(rval) % 60;
1315                         wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1316                                    "seconds", sec);
1317                         wpa_s->pending_mic_error_report = 1;
1318                         wpa_s->pending_mic_error_pairwise = pairwise;
1319                         eloop_cancel_timeout(
1320                                 wpa_supplicant_delayed_mic_error_report,
1321                                 wpa_s, NULL);
1322                         eloop_register_timeout(
1323                                 sec, os_random() % 1000000,
1324                                 wpa_supplicant_delayed_mic_error_report,
1325                                 wpa_s, NULL);
1326                 } else {
1327                         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1328                 }
1329 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1330                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1331 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1332         }
1333         wpa_s->last_michael_mic_error = t.sec;
1334         wpa_s->mic_errors_seen++;
1335 }
1336
1337
1338 #ifdef CONFIG_TERMINATE_ONLASTIF
1339 static int any_interfaces(struct wpa_supplicant *head)
1340 {
1341         struct wpa_supplicant *wpa_s;
1342
1343         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1344                 if (!wpa_s->interface_removed)
1345                         return 1;
1346         return 0;
1347 }
1348 #endif /* CONFIG_TERMINATE_ONLASTIF */
1349
1350
1351 static void
1352 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1353                                       union wpa_event_data *data)
1354 {
1355         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1356                 return;
1357
1358         switch (data->interface_status.ievent) {
1359         case EVENT_INTERFACE_ADDED:
1360                 if (!wpa_s->interface_removed)
1361                         break;
1362                 wpa_s->interface_removed = 0;
1363                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1364                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1365                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
1366                                    "after interface was added.");
1367                 }
1368                 break;
1369         case EVENT_INTERFACE_REMOVED:
1370                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1371                 wpa_s->interface_removed = 1;
1372                 wpa_supplicant_mark_disassoc(wpa_s);
1373                 l2_packet_deinit(wpa_s->l2);
1374                 wpa_s->l2 = NULL;
1375 #ifdef CONFIG_TERMINATE_ONLASTIF
1376                 /* check if last interface */
1377                 if (!any_interfaces(wpa_s->global->ifaces))
1378                         eloop_terminate();
1379 #endif /* CONFIG_TERMINATE_ONLASTIF */
1380                 break;
1381         }
1382 }
1383
1384
1385 #ifdef CONFIG_PEERKEY
1386 static void
1387 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1388                               union wpa_event_data *data)
1389 {
1390         if (data == NULL)
1391                 return;
1392         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1393 }
1394 #endif /* CONFIG_PEERKEY */
1395
1396
1397 #ifdef CONFIG_IEEE80211R
1398 static void
1399 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1400                                  union wpa_event_data *data)
1401 {
1402         if (data == NULL)
1403                 return;
1404
1405         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1406                                     data->ft_ies.ies_len,
1407                                     data->ft_ies.ft_action,
1408                                     data->ft_ies.target_ap,
1409                                     data->ft_ies.ric_ies,
1410                                     data->ft_ies.ric_ies_len) < 0) {
1411                 /* TODO: prevent MLME/driver from trying to associate? */
1412         }
1413 }
1414 #endif /* CONFIG_IEEE80211R */
1415
1416
1417 #ifdef CONFIG_IBSS_RSN
1418 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1419                                                 union wpa_event_data *data)
1420 {
1421         if (data == NULL)
1422                 return;
1423         ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1424 }
1425 #endif /* CONFIG_IBSS_RSN */
1426
1427
1428 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
1429                           union wpa_event_data *data)
1430 {
1431         struct wpa_supplicant *wpa_s = ctx;
1432
1433         switch (event) {
1434         case EVENT_AUTH:
1435                 sme_event_auth(wpa_s, data);
1436                 break;
1437         case EVENT_ASSOC:
1438                 wpa_supplicant_event_assoc(wpa_s, data);
1439                 break;
1440         case EVENT_DISASSOC:
1441 #ifdef CONFIG_AP
1442                 if (wpa_s->ap_iface && data) {
1443                         hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
1444                                                data->disassoc_info.addr);
1445                         break;
1446                 }
1447 #endif /* CONFIG_AP */
1448                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1449                         sme_event_disassoc(wpa_s, data);
1450                 /* fall through */
1451         case EVENT_DEAUTH:
1452 #ifdef CONFIG_AP
1453                 if (wpa_s->ap_iface && data) {
1454                         hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
1455                                                data->deauth_info.addr);
1456                         break;
1457                 }
1458 #endif /* CONFIG_AP */
1459                 wpa_supplicant_event_disassoc(wpa_s);
1460                 break;
1461         case EVENT_MICHAEL_MIC_FAILURE:
1462                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1463                 break;
1464 #ifndef CONFIG_NO_SCAN_PROCESSING
1465         case EVENT_SCAN_RESULTS:
1466                 wpa_supplicant_event_scan_results(wpa_s, data);
1467                 break;
1468 #endif /* CONFIG_NO_SCAN_PROCESSING */
1469         case EVENT_ASSOCINFO:
1470                 wpa_supplicant_event_associnfo(wpa_s, data);
1471                 break;
1472         case EVENT_INTERFACE_STATUS:
1473                 wpa_supplicant_event_interface_status(wpa_s, data);
1474                 break;
1475         case EVENT_PMKID_CANDIDATE:
1476                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1477                 break;
1478 #ifdef CONFIG_PEERKEY
1479         case EVENT_STKSTART:
1480                 wpa_supplicant_event_stkstart(wpa_s, data);
1481                 break;
1482 #endif /* CONFIG_PEERKEY */
1483 #ifdef CONFIG_IEEE80211R
1484         case EVENT_FT_RESPONSE:
1485                 wpa_supplicant_event_ft_response(wpa_s, data);
1486                 break;
1487 #endif /* CONFIG_IEEE80211R */
1488 #ifdef CONFIG_IBSS_RSN
1489         case EVENT_IBSS_RSN_START:
1490                 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1491                 break;
1492 #endif /* CONFIG_IBSS_RSN */
1493         case EVENT_ASSOC_REJECT:
1494                 sme_event_assoc_reject(wpa_s, data);
1495                 break;
1496         case EVENT_AUTH_TIMED_OUT:
1497                 sme_event_auth_timed_out(wpa_s, data);
1498                 break;
1499         case EVENT_ASSOC_TIMED_OUT:
1500                 sme_event_assoc_timed_out(wpa_s, data);
1501                 break;
1502 #ifdef CONFIG_AP
1503         case EVENT_TX_STATUS:
1504                 if (wpa_s->ap_iface == NULL)
1505                         break;
1506                 switch (data->tx_status.type) {
1507                 case WLAN_FC_TYPE_MGMT:
1508                         ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
1509                                       data->tx_status.data_len,
1510                                       data->tx_status.stype,
1511                                       data->tx_status.ack);
1512                         break;
1513                 case WLAN_FC_TYPE_DATA:
1514                         ap_tx_status(wpa_s, data->tx_status.dst,
1515                                      data->tx_status.data,
1516                                      data->tx_status.data_len,
1517                                      data->tx_status.ack);
1518                         break;
1519                 }
1520                 break;
1521         case EVENT_RX_FROM_UNKNOWN:
1522                 if (wpa_s->ap_iface == NULL)
1523                         break;
1524                 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.frame,
1525                                        data->rx_from_unknown.len);
1526                 break;
1527         case EVENT_RX_MGMT:
1528                 if (wpa_s->ap_iface == NULL)
1529                         break;
1530                 ap_mgmt_rx(wpa_s, &data->rx_mgmt);
1531                 break;
1532 #endif /* CONFIG_AP */
1533 #ifdef CONFIG_CLIENT_MLME
1534         case EVENT_MLME_RX: {
1535                 struct ieee80211_rx_status rx_status;
1536                 os_memset(&rx_status, 0, sizeof(rx_status));
1537                 rx_status.freq = data->mlme_rx.freq;
1538                 rx_status.channel = data->mlme_rx.channel;
1539                 rx_status.ssi = data->mlme_rx.ssi;
1540                 ieee80211_sta_rx(wpa_s, data->mlme_rx.buf, data->mlme_rx.len,
1541                                  &rx_status);
1542                 break;
1543         }
1544 #endif /* CONFIG_CLIENT_MLME */
1545         case EVENT_EAPOL_RX:
1546                 wpa_supplicant_rx_eapol(wpa_s, data->eapol_rx.src,
1547                                         data->eapol_rx.data,
1548                                         data->eapol_rx.data_len);
1549                 break;
1550         default:
1551                 wpa_printf(MSG_INFO, "Unknown event %d", event);
1552                 break;
1553         }
1554 }