vcs.maemo.org Git - wpasupplicant/blob - wpa_supplicant/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eapol_supp/eapol_supp_sm.h"
  19 #include "wpa.h"
  20 #include "eloop.h"
  21 #include "drivers/driver.h"
  22 #include "config.h"
  23 #include "l2_packet/l2_packet.h"
  24 #include "wpa_supplicant_i.h"
  25 #include "pcsc_funcs.h"
  26 #include "preauth.h"
  27 #include "pmksa_cache.h"
  28 #include "wpa_ctrl.h"
  29 #include "eap_peer/eap.h"
  30 #include "ctrl_iface_dbus.h"
  31 #include "ieee802_11_defs.h"
  32 #include "blacklist.h"
  33 #include "wpas_glue.h"
  34
  35
  36 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  37 {
  38         struct wpa_ssid *ssid;
  39
  40         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  41                 return 0;
  42
  43         wpa_printf(MSG_DEBUG, "Select network based on association "
  44                    "information");
  45         ssid = wpa_supplicant_get_ssid(wpa_s);
  46         if (ssid == NULL) {
  47                 wpa_printf(MSG_INFO, "No network configuration found for the "
  48                            "current AP");
  49                 return -1;
  50         }
  51
  52         if (ssid->disabled) {
  53                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  54                 return -1;
  55         }
  56
  57         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  58                    "AP");
  59         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  60                               WPA_KEY_MGMT_WPA_NONE |
  61                               WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
  62                               WPA_KEY_MGMT_PSK_SHA256 |
  63                               WPA_KEY_MGMT_IEEE8021X_SHA256)) {
  64                 u8 wpa_ie[80];
  65                 size_t wpa_ie_len = sizeof(wpa_ie);
  66                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  67                                           wpa_ie, &wpa_ie_len);
  68         } else {
  69                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  70         }
  71
  72         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  73                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  74         wpa_s->current_ssid = ssid;
  75         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  76         wpa_supplicant_initiate_eapol(wpa_s);
  77
  78         return 0;
  79 }
  80
  81
  82 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  83                                                 void *sock_ctx)
  84 {
  85         struct wpa_supplicant *wpa_s = eloop_ctx;
  86
  87         if (wpa_s->countermeasures) {
  88                 wpa_s->countermeasures = 0;
  89                 wpa_drv_set_countermeasures(wpa_s, 0);
  90                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
  91                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  92         }
  93 }
  94
  95
  96 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
  97 {
  98         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
  99         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 100         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 101         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 102         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 103         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 104                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 105         wpa_s->ap_ies_from_associnfo = 0;
 106 }
 107
 108
 109 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 110 {
 111         struct wpa_ie_data ie;
 112         int pmksa_set = -1;
 113         size_t i;
 114
 115         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 116             ie.pmkid == NULL)
 117                 return;
 118
 119         for (i = 0; i < ie.num_pmkid; i++) {
 120                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 121                                                     ie.pmkid + i * PMKID_LEN,
 122                                                     NULL, NULL, 0);
 123                 if (pmksa_set == 0) {
 124                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 125                         break;
 126                 }
 127         }
 128
 129         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 130                    "cache", pmksa_set == 0 ? "" : "not ");
 131 }
 132
 133
 134 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 135                                                  union wpa_event_data *data)
 136 {
 137         if (data == NULL) {
 138                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 139                 return;
 140         }
 141         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 142                    " index=%d preauth=%d",
 143                    MAC2STR(data->pmkid_candidate.bssid),
 144                    data->pmkid_candidate.index,
 145                    data->pmkid_candidate.preauth);
 146
 147         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 148                             data->pmkid_candidate.index,
 149                             data->pmkid_candidate.preauth);
 150 }
 151
 152
 153 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 154 {
 155         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 156             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 157                 return 0;
 158
 159 #ifdef IEEE8021X_EAPOL
 160         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 161             wpa_s->current_ssid &&
 162             !(wpa_s->current_ssid->eapol_flags &
 163               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 164                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 165                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 166                  * plaintext or static WEP keys). */
 167                 return 0;
 168         }
 169 #endif /* IEEE8021X_EAPOL */
 170
 171         return 1;
 172 }
 173
 174
 175 /**
 176  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 177  * @wpa_s: pointer to wpa_supplicant data
 178  * @ssid: Configuration data for the network
 179  * Returns: 0 on success, -1 on failure
 180  *
 181  * This function is called when starting authentication with a network that is
 182  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 183  */
 184 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 185                               struct wpa_ssid *ssid)
 186 {
 187 #ifdef IEEE8021X_EAPOL
 188         int aka = 0, sim = 0, type;
 189
 190         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 191                 return 0;
 192
 193         if (ssid->eap.eap_methods == NULL) {
 194                 sim = 1;
 195                 aka = 1;
 196         } else {
 197                 struct eap_method_type *eap = ssid->eap.eap_methods;
 198                 while (eap->vendor != EAP_VENDOR_IETF ||
 199                        eap->method != EAP_TYPE_NONE) {
 200                         if (eap->vendor == EAP_VENDOR_IETF) {
 201                                 if (eap->method == EAP_TYPE_SIM)
 202                                         sim = 1;
 203                                 else if (eap->method == EAP_TYPE_AKA)
 204                                         aka = 1;
 205                         }
 206                         eap++;
 207                 }
 208         }
 209
 210         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 211                 sim = 0;
 212         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 213                 aka = 0;
 214
 215         if (!sim && !aka) {
 216                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 217                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 218                 return 0;
 219         }
 220
 221         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 222                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 223         if (sim && aka)
 224                 type = SCARD_TRY_BOTH;
 225         else if (aka)
 226                 type = SCARD_USIM_ONLY;
 227         else
 228                 type = SCARD_GSM_SIM_ONLY;
 229
 230         wpa_s->scard = scard_init(type);
 231         if (wpa_s->scard == NULL) {
 232                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 233                            "(pcsc-lite)");
 234                 return -1;
 235         }
 236         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 237         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 238 #endif /* IEEE8021X_EAPOL */
 239
 240         return 0;
 241 }
 242
 243
 244 #ifndef CONFIG_NO_SCAN_PROCESSING
 245 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 246                                         struct wpa_ssid *ssid)
 247 {
 248         int i, privacy = 0;
 249
 250         if (ssid->mixed_cell)
 251                 return 1;
 252
 253         for (i = 0; i < NUM_WEP_KEYS; i++) {
 254                 if (ssid->wep_key_len[i]) {
 255                         privacy = 1;
 256                         break;
 257                 }
 258         }
 259 #ifdef IEEE8021X_EAPOL
 260         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 261             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 262                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 263                 privacy = 1;
 264 #endif /* IEEE8021X_EAPOL */
 265
 266         if (bss->caps & IEEE80211_CAP_PRIVACY)
 267                 return privacy;
 268         return !privacy;
 269 }
 270
 271
 272 static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid,
 273                                          struct wpa_scan_res *bss)
 274 {
 275         struct wpa_ie_data ie;
 276         int proto_match = 0;
 277         const u8 *rsn_ie, *wpa_ie;
 278
 279         rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 280         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 281                 proto_match++;
 282
 283                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 284                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 285                         break;
 286                 }
 287                 if (!(ie.proto & ssid->proto)) {
 288                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 289                                    "mismatch");
 290                         break;
 291                 }
 292
 293                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 294                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 295                                    "mismatch");
 296                         break;
 297                 }
 298
 299                 if (!(ie.group_cipher & ssid->group_cipher)) {
 300                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 301                                    "mismatch");
 302                         break;
 303                 }
 304
 305                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 306                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 307                                    "mismatch");
 308                         break;
 309                 }
 310
 311 #ifdef CONFIG_IEEE80211W
 312                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 313                     ssid->ieee80211w == IEEE80211W_REQUIRED) {
 314                         wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 315                                    "protection");
 316                         break;
 317                 }
 318 #endif /* CONFIG_IEEE80211W */
 319
 320                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 321                 return 1;
 322         }
 323
 324         wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 325         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 326                 proto_match++;
 327
 328                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 329                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 330                         break;
 331                 }
 332                 if (!(ie.proto & ssid->proto)) {
 333                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 334                                    "mismatch");
 335                         break;
 336                 }
 337
 338                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 339                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 340                                    "mismatch");
 341                         break;
 342                 }
 343
 344                 if (!(ie.group_cipher & ssid->group_cipher)) {
 345                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 346                                    "mismatch");
 347                         break;
 348                 }
 349
 350                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 351                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 352                                    "mismatch");
 353                         break;
 354                 }
 355
 356                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 357                 return 1;
 358         }
 359
 360         if (proto_match == 0)
 361                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 362
 363         return 0;
 364 }
 365
 366
 367 static struct wpa_scan_res *
 368 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 369                           struct wpa_ssid **selected_ssid)
 370 {
 371         struct wpa_ssid *ssid;
 372         struct wpa_scan_res *bss, *selected = NULL;
 373         size_t i;
 374         struct wpa_blacklist *e;
 375         const u8 *ie;
 376
 377         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 378                    group->priority);
 379
 380         bss = NULL;
 381         ssid = NULL;
 382         /* First, try to find WPA-enabled AP */
 383         wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 384         for (i = 0; i < wpa_s->scan_res->num && !selected; i++) {
 385                 const u8 *ssid_;
 386                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 387                 bss = wpa_s->scan_res->res[i];
 388
 389                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 390                 ssid_ = ie ? ie + 2 : (u8 *) "";
 391                 ssid_len = ie ? ie[1] : 0;
 392
 393                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 394                 wpa_ie_len = ie ? ie[1] : 0;
 395
 396                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 397                 rsn_ie_len = ie ? ie[1] : 0;
 398
 399                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 400                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 401                            (int) i, MAC2STR(bss->bssid),
 402                            wpa_ssid_txt(ssid_, ssid_len),
 403                            wpa_ie_len, rsn_ie_len, bss->caps);
 404                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 405                 if (e && e->count > 1) {
 406                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 407                         continue;
 408                 }
 409
 410                 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
 411                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 412                         continue;
 413                 }
 414
 415                 for (ssid = group; ssid; ssid = ssid->pnext) {
 416                         if (ssid->disabled) {
 417                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 418                                 continue;
 419                         }
 420                         if (ssid_len != ssid->ssid_len ||
 421                             os_memcmp(ssid_, ssid->ssid, ssid_len) != 0) {
 422                                 wpa_printf(MSG_DEBUG, "   skip - "
 423                                            "SSID mismatch");
 424                                 continue;
 425                         }
 426                         if (ssid->bssid_set &&
 427                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 428                         {
 429                                 wpa_printf(MSG_DEBUG, "   skip - "
 430                                            "BSSID mismatch");
 431                                 continue;
 432                         }
 433                         if (wpa_supplicant_ssid_bss_match(ssid, bss)) {
 434                                 selected = bss;
 435                                 *selected_ssid = ssid;
 436                                 wpa_printf(MSG_DEBUG, "   selected WPA AP "
 437                                            MACSTR " ssid='%s'",
 438                                            MAC2STR(bss->bssid),
 439                                            wpa_ssid_txt(ssid_, ssid_len));
 440                                 break;
 441                         }
 442                 }
 443         }
 444
 445         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 446          * allows this. */
 447         wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 448         for (i = 0; i < wpa_s->scan_res->num && !selected; i++) {
 449                 const u8 *ssid_;
 450                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 451                 bss = wpa_s->scan_res->res[i];
 452
 453                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 454                 ssid_ = ie ? ie + 2 : (u8 *) "";
 455                 ssid_len = ie ? ie[1] : 0;
 456
 457                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 458                 wpa_ie_len = ie ? ie[1] : 0;
 459
 460                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 461                 rsn_ie_len = ie ? ie[1] : 0;
 462
 463                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 464                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 465                            (int) i, MAC2STR(bss->bssid),
 466                            wpa_ssid_txt(ssid_, ssid_len),
 467                            wpa_ie_len, rsn_ie_len, bss->caps);
 468                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 469                 if (e && e->count > 1) {
 470                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 471                         continue;
 472                 }
 473                 for (ssid = group; ssid; ssid = ssid->pnext) {
 474                         if (ssid->disabled) {
 475                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 476                                 continue;
 477                         }
 478                         if (ssid->ssid_len != 0 &&
 479                             (ssid_len != ssid->ssid_len ||
 480                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 481                                 wpa_printf(MSG_DEBUG, "   skip - "
 482                                            "SSID mismatch");
 483                                 continue;
 484                         }
 485
 486                         if (ssid->bssid_set &&
 487                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 488                         {
 489                                 wpa_printf(MSG_DEBUG, "   skip - "
 490                                            "BSSID mismatch");
 491                                 continue;
 492                         }
 493
 494                         if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 495                             !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 496                         {
 497                                 wpa_printf(MSG_DEBUG, "   skip - "
 498                                            "non-WPA network not allowed");
 499                                 continue;
 500                         }
 501
 502                         if ((ssid->key_mgmt &
 503                              (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 504                               WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
 505                               WPA_KEY_MGMT_IEEE8021X_SHA256 |
 506                               WPA_KEY_MGMT_PSK_SHA256)) &&
 507                             (wpa_ie_len != 0 || rsn_ie_len != 0)) {
 508                                 wpa_printf(MSG_DEBUG, "   skip - "
 509                                            "WPA network");
 510                                 continue;
 511                         }
 512
 513                         if (!wpa_supplicant_match_privacy(bss, ssid)) {
 514                                 wpa_printf(MSG_DEBUG, "   skip - "
 515                                            "privacy mismatch");
 516                                 continue;
 517                         }
 518
 519                         if (bss->caps & IEEE80211_CAP_IBSS) {
 520                                 wpa_printf(MSG_DEBUG, "   skip - "
 521                                            "IBSS (adhoc) network");
 522                                 continue;
 523                         }
 524
 525                         selected = bss;
 526                         *selected_ssid = ssid;
 527                         wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 528                                    MACSTR " ssid='%s'",
 529                                    MAC2STR(bss->bssid),
 530                                    wpa_ssid_txt(ssid_, ssid_len));
 531                         break;
 532                 }
 533         }
 534
 535         return selected;
 536 }
 537
 538
 539 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 540 {
 541         int prio, timeout;
 542         struct wpa_scan_res *selected = NULL;
 543         struct wpa_ssid *ssid = NULL;
 544
 545         if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 546                 if (wpa_s->conf->ap_scan == 2)
 547                         return;
 548                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 549                            "scanning again");
 550                 timeout = 1;
 551                 goto req_scan;
 552         }
 553
 554         /*
 555          * Don't post the results if this was the initial cached
 556          * and there were no results.
 557          */
 558         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
 559             wpa_s->scan_res->num == 0) {
 560                 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
 561                         "empty - not posting");
 562         } else {
 563                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
 564                 wpa_supplicant_dbus_notify_scan_results(wpa_s);
 565         }
 566
 567         if (wpa_s->conf->ap_scan == 2 || wpa_s->disconnected)
 568                 return;
 569
 570         while (selected == NULL) {
 571                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 572                         selected = wpa_supplicant_select_bss(
 573                                 wpa_s, wpa_s->conf->pssid[prio], &ssid);
 574                         if (selected)
 575                                 break;
 576                 }
 577
 578                 if (selected == NULL && wpa_s->blacklist) {
 579                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 580                                    "and try again");
 581                         wpa_blacklist_clear(wpa_s);
 582                 } else if (selected == NULL) {
 583                         break;
 584                 }
 585         }
 586
 587         if (selected) {
 588                 /* Do not trigger new association unless the BSSID has changed
 589                  * or if reassociation is requested. If we are in process of
 590                  * associating with the selected BSSID, do not trigger new
 591                  * attempt. */
 592                 if (wpa_s->reassociate ||
 593                     (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 594                      (wpa_s->wpa_state != WPA_ASSOCIATING ||
 595                       os_memcmp(selected->bssid, wpa_s->pending_bssid,
 596                                 ETH_ALEN) != 0))) {
 597                         if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 598                                 wpa_supplicant_req_scan(wpa_s, 10, 0);
 599                                 return;
 600                         }
 601                         wpa_supplicant_associate(wpa_s, selected, ssid);
 602                 } else {
 603                         wpa_printf(MSG_DEBUG, "Already associated with the "
 604                                    "selected AP.");
 605                 }
 606                 rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
 607         } else {
 608                 wpa_printf(MSG_DEBUG, "No suitable AP found.");
 609                 timeout = 5;
 610                 goto req_scan;
 611         }
 612
 613         return;
 614
 615 req_scan:
 616         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 617                 /*
 618                  * Quick recovery if the initial scan results were not
 619                  * complete when fetched before the first scan request.
 620                  */
 621                 wpa_s->scan_res_tried++;
 622                 timeout = 0;
 623         }
 624         wpa_supplicant_req_scan(wpa_s, timeout, 0);
 625 }
 626 #endif /* CONFIG_NO_SCAN_PROCESSING */
 627
 628
 629 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 630                                            union wpa_event_data *data)
 631 {
 632         int l, len, found = 0, wpa_found, rsn_found;
 633         u8 *p;
 634
 635         wpa_printf(MSG_DEBUG, "Association info event");
 636         if (data->assoc_info.req_ies)
 637                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 638                             data->assoc_info.req_ies_len);
 639         if (data->assoc_info.resp_ies)
 640                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 641                             data->assoc_info.resp_ies_len);
 642         if (data->assoc_info.beacon_ies)
 643                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 644                             data->assoc_info.beacon_ies,
 645                             data->assoc_info.beacon_ies_len);
 646
 647         p = data->assoc_info.req_ies;
 648         l = data->assoc_info.req_ies_len;
 649
 650         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 651         while (p && l >= 2) {
 652                 len = p[1] + 2;
 653                 if (len > l) {
 654                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 655                                     p, l);
 656                         break;
 657                 }
 658                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 659                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 660                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
 661                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 662                                 break;
 663                         found = 1;
 664                         wpa_find_assoc_pmkid(wpa_s);
 665                         break;
 666                 }
 667                 l -= len;
 668                 p += len;
 669         }
 670         if (!found && data->assoc_info.req_ies)
 671                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 672
 673         /* WPA/RSN IE from Beacon/ProbeResp */
 674         p = data->assoc_info.beacon_ies;
 675         l = data->assoc_info.beacon_ies_len;
 676
 677         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 678          */
 679         wpa_found = rsn_found = 0;
 680         while (p && l >= 2) {
 681                 len = p[1] + 2;
 682                 if (len > l) {
 683                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 684                                     p, l);
 685                         break;
 686                 }
 687                 if (!wpa_found &&
 688                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 689                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 690                         wpa_found = 1;
 691                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 692                 }
 693
 694                 if (!rsn_found &&
 695                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
 696                         rsn_found = 1;
 697                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 698                 }
 699
 700                 l -= len;
 701                 p += len;
 702         }
 703
 704         if (!wpa_found && data->assoc_info.beacon_ies)
 705                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 706         if (!rsn_found && data->assoc_info.beacon_ies)
 707                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 708         if (wpa_found || rsn_found)
 709                 wpa_s->ap_ies_from_associnfo = 1;
 710 }
 711
 712
 713 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 714                                        union wpa_event_data *data)
 715 {
 716         u8 bssid[ETH_ALEN];
 717         int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
 718
 719         if (data)
 720                 wpa_supplicant_event_associnfo(wpa_s, data);
 721
 722         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 723         if (wpa_s->use_client_mlme)
 724                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
 725         if (wpa_s->use_client_mlme ||
 726             (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
 727              os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
 728                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
 729                         MACSTR, MAC2STR(bssid));
 730                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
 731                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 732                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
 733                         wpa_clear_keys(wpa_s, bssid);
 734                 }
 735                 if (wpa_supplicant_select_config(wpa_s) < 0) {
 736                         wpa_supplicant_disassociate(
 737                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 738                         return;
 739                 }
 740         }
 741
 742         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
 743         if (wpa_s->current_ssid) {
 744                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
 745                  * initialized before association, but for other modes,
 746                  * initialize PC/SC here, if the current configuration needs
 747                  * smartcard or SIM/USIM. */
 748                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
 749         }
 750         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
 751         l2_packet_notify_auth_start(wpa_s->l2);
 752
 753         /*
 754          * Set portEnabled first to FALSE in order to get EAP state machine out
 755          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
 756          * state machine may transit to AUTHENTICATING state based on obsolete
 757          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
 758          * AUTHENTICATED without ever giving chance to EAP state machine to
 759          * reset the state.
 760          */
 761         if (!ft_completed) {
 762                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 763                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 764         }
 765         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
 766                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 767         /* 802.1X::portControl = Auto */
 768         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
 769         wpa_s->eapol_received = 0;
 770         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 771             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 772                 wpa_supplicant_cancel_auth_timeout(wpa_s);
 773                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 774         } else if (!ft_completed) {
 775                 /* Timeout for receiving the first EAPOL packet */
 776                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
 777         }
 778         wpa_supplicant_cancel_scan(wpa_s);
 779
 780         if (wpa_s->driver_4way_handshake &&
 781             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 782                 /*
 783                  * We are done; the driver will take care of RSN 4-way
 784                  * handshake.
 785                  */
 786                 wpa_supplicant_cancel_auth_timeout(wpa_s);
 787                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 788                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
 789                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 790         }
 791 }
 792
 793
 794 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
 795 {
 796         const u8 *bssid;
 797
 798         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 799                 /*
 800                  * At least Host AP driver and a Prism3 card seemed to be
 801                  * generating streams of disconnected events when configuring
 802                  * IBSS for WPA-None. Ignore them for now.
 803                  */
 804                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
 805                            "IBSS/WPA-None mode");
 806                 return;
 807         }
 808
 809         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
 810             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
 811                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
 812                         "pre-shared key may be incorrect");
 813         }
 814         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
 815                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
 816         bssid = wpa_s->bssid;
 817         if (is_zero_ether_addr(bssid))
 818                 bssid = wpa_s->pending_bssid;
 819         wpa_blacklist_add(wpa_s, bssid);
 820         wpa_sm_notify_disassoc(wpa_s->wpa);
 821         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
 822                 "remove keys");
 823         if (wpa_supplicant_dynamic_keys(wpa_s)) {
 824                 wpa_s->keys_cleared = 0;
 825                 wpa_clear_keys(wpa_s, wpa_s->bssid);
 826         }
 827         wpa_supplicant_mark_disassoc(wpa_s);
 828 }
 829
 830
 831 static void
 832 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
 833                                          union wpa_event_data *data)
 834 {
 835         int pairwise;
 836         struct os_time t;
 837
 838         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
 839         pairwise = (data && data->michael_mic_failure.unicast);
 840         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
 841         os_get_time(&t);
 842         if (wpa_s->last_michael_mic_error &&
 843             t.sec - wpa_s->last_michael_mic_error <= 60) {
 844                 /* initialize countermeasures */
 845                 wpa_s->countermeasures = 1;
 846                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
 847
 848                 /*
 849                  * Need to wait for completion of request frame. We do not get
 850                  * any callback for the message completion, so just wait a
 851                  * short while and hope for the best. */
 852                 os_sleep(0, 10000);
 853
 854                 wpa_drv_set_countermeasures(wpa_s, 1);
 855                 wpa_supplicant_deauthenticate(wpa_s,
 856                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
 857                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
 858                                      wpa_s, NULL);
 859                 eloop_register_timeout(60, 0,
 860                                        wpa_supplicant_stop_countermeasures,
 861                                        wpa_s, NULL);
 862                 /* TODO: mark the AP rejected for 60 second. STA is
 863                  * allowed to associate with another AP.. */
 864         }
 865         wpa_s->last_michael_mic_error = t.sec;
 866 }
 867
 868
 869 static void
 870 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
 871                                       union wpa_event_data *data)
 872 {
 873         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
 874                 return;
 875
 876         switch (data->interface_status.ievent) {
 877         case EVENT_INTERFACE_ADDED:
 878                 if (!wpa_s->interface_removed)
 879                         break;
 880                 wpa_s->interface_removed = 0;
 881                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
 882                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
 883                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
 884                                    "after interface was added.");
 885                 }
 886                 break;
 887         case EVENT_INTERFACE_REMOVED:
 888                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
 889                 wpa_s->interface_removed = 1;
 890                 wpa_supplicant_mark_disassoc(wpa_s);
 891                 l2_packet_deinit(wpa_s->l2);
 892                 wpa_s->l2 = NULL;
 893                 break;
 894         }
 895 }
 896
 897
 898 #ifdef CONFIG_PEERKEY
 899 static void
 900 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
 901                               union wpa_event_data *data)
 902 {
 903         if (data == NULL)
 904                 return;
 905         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
 906 }
 907 #endif /* CONFIG_PEERKEY */
 908
 909
 910 #ifdef CONFIG_IEEE80211R
 911 static void
 912 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
 913                                  union wpa_event_data *data)
 914 {
 915         if (data == NULL)
 916                 return;
 917
 918         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
 919                                     data->ft_ies.ies_len,
 920                                     data->ft_ies.ft_action,
 921                                     data->ft_ies.target_ap) < 0) {
 922                 /* TODO: prevent MLME/driver from trying to associate? */
 923         }
 924 }
 925 #endif /* CONFIG_IEEE80211R */
 926
 927
 928 void wpa_supplicant_event(void *ctx, wpa_event_type event,
 929                           union wpa_event_data *data)
 930 {
 931         struct wpa_supplicant *wpa_s = ctx;
 932
 933         switch (event) {
 934         case EVENT_ASSOC:
 935                 wpa_supplicant_event_assoc(wpa_s, data);
 936                 break;
 937         case EVENT_DISASSOC:
 938                 wpa_supplicant_event_disassoc(wpa_s);
 939                 break;
 940         case EVENT_MICHAEL_MIC_FAILURE:
 941                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
 942                 break;
 943 #ifndef CONFIG_NO_SCAN_PROCESSING
 944         case EVENT_SCAN_RESULTS:
 945                 wpa_supplicant_event_scan_results(wpa_s);
 946                 break;
 947 #endif /* CONFIG_NO_SCAN_PROCESSING */
 948         case EVENT_ASSOCINFO:
 949                 wpa_supplicant_event_associnfo(wpa_s, data);
 950                 break;
 951         case EVENT_INTERFACE_STATUS:
 952                 wpa_supplicant_event_interface_status(wpa_s, data);
 953                 break;
 954         case EVENT_PMKID_CANDIDATE:
 955                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
 956                 break;
 957 #ifdef CONFIG_PEERKEY
 958         case EVENT_STKSTART:
 959                 wpa_supplicant_event_stkstart(wpa_s, data);
 960                 break;
 961 #endif /* CONFIG_PEERKEY */
 962 #ifdef CONFIG_IEEE80211R
 963         case EVENT_FT_RESPONSE:
 964                 wpa_supplicant_event_ft_response(wpa_s, data);
 965                 break;
 966 #endif /* CONFIG_IEEE80211R */
 967         default:
 968                 wpa_printf(MSG_INFO, "Unknown event %d", event);
 969                 break;
 970         }
 971 }