contrib/wpa_supplicant-0.4.9/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2006, Jouni Malinen <jkmaline@cc.hut.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 <stdlib.h>
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <unistd.h>
  19 #include <time.h>
  20
  21 #include "common.h"
  22 #include "eapol_sm.h"
  23 #include "wpa.h"
  24 #include "eloop.h"
  25 #include "wpa_supplicant.h"
  26 #include "config.h"
  27 #include "l2_packet.h"
  28 #include "wpa_supplicant_i.h"
  29 #include "pcsc_funcs.h"
  30 #include "preauth.h"
  31 #include "wpa_ctrl.h"
  32 #include "eap.h"
  33
  34
  35 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  36 {
  37         struct wpa_ssid *ssid;
  38
  39         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  40                 return 0;
  41
  42         ssid = wpa_supplicant_get_ssid(wpa_s);
  43         if (ssid == NULL) {
  44                 wpa_printf(MSG_INFO, "No network configuration found for the "
  45                            "current AP");
  46                 return -1;
  47         }
  48
  49         if (ssid->disabled) {
  50                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  51                 return -1;
  52         }
  53
  54         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  55                    "AP");
  56         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  57                               WPA_KEY_MGMT_WPA_NONE)) {
  58                 u8 wpa_ie[80];
  59                 size_t wpa_ie_len = sizeof(wpa_ie);
  60                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  61                                           wpa_ie, &wpa_ie_len);
  62         } else {
  63                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  64         }
  65
  66         wpa_s->current_ssid = ssid;
  67         wpa_sm_set_config(wpa_s->wpa, wpa_s->current_ssid);
  68         wpa_supplicant_initiate_eapol(wpa_s);
  69
  70         return 0;
  71 }
  72
  73
  74 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  75                                                 void *sock_ctx)
  76 {
  77         struct wpa_supplicant *wpa_s = eloop_ctx;
  78
  79         if (wpa_s->countermeasures) {
  80                 wpa_s->countermeasures = 0;
  81                 wpa_drv_set_countermeasures(wpa_s, 0);
  82                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
  83                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  84         }
  85 }
  86
  87
  88 static void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
  89 {
  90         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
  91         memset(wpa_s->bssid, 0, ETH_ALEN);
  92         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
  93         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
  94         if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
  95                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
  96 }
  97
  98
  99 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 100 {
 101         struct wpa_ie_data ie;
 102         int i, pmksa_set = -1;
 103
 104         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 105             ie.pmkid == NULL)
 106                 return;
 107
 108         for (i = 0; i < ie.num_pmkid; i++) {
 109                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 110                                                     ie.pmkid + i * PMKID_LEN,
 111                                                     NULL, NULL, 0);
 112                 if (pmksa_set == 0) {
 113                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 114                         break;
 115                 }
 116         }
 117
 118         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 119                    "cache", pmksa_set == 0 ? "" : "not ");
 120 }
 121
 122
 123 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 124                                                  union wpa_event_data *data)
 125 {
 126         if (data == NULL) {
 127                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 128                 return;
 129         }
 130         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 131                    " index=%d preauth=%d",
 132                    MAC2STR(data->pmkid_candidate.bssid),
 133                    data->pmkid_candidate.index,
 134                    data->pmkid_candidate.preauth);
 135
 136         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 137                             data->pmkid_candidate.index,
 138                             data->pmkid_candidate.preauth);
 139 }
 140
 141
 142 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 143 {
 144         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 145             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 146                 return 0;
 147
 148         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 149             wpa_s->current_ssid &&
 150             !(wpa_s->current_ssid->eapol_flags &
 151               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 152                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 153                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 154                  * plaintext or static WEP keys). */
 155                 return 0;
 156         }
 157
 158         return 1;
 159 }
 160
 161
 162 /**
 163  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 164  * @wpa_s: pointer to wpa_supplicant data
 165  * @ssid: Configuration data for the network
 166  * Returns: 0 on success, -1 on failure
 167  *
 168  * This function is called when starting authentication with a network that is
 169  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 170  */
 171 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 172                               struct wpa_ssid *ssid)
 173 {
 174         int aka = 0, sim = 0, type;
 175
 176         if (ssid->pcsc == NULL || wpa_s->scard != NULL)
 177                 return 0;
 178
 179         if (ssid->eap_methods == NULL) {
 180                 sim = 1;
 181                 aka = 1;
 182         } else {
 183                 u8 *eap = ssid->eap_methods;
 184                 while (*eap != EAP_TYPE_NONE) {
 185                         if (*eap == EAP_TYPE_SIM)
 186                                 sim = 1;
 187                         else if (*eap == EAP_TYPE_AKA)
 188                                 aka = 1;
 189                         eap++;
 190                 }
 191         }
 192
 193 #ifndef EAP_SIM
 194         sim = 0;
 195 #endif /* EAP_SIM */
 196 #ifndef EAP_AKA
 197         aka = 0;
 198 #endif /* EAP_AKA */
 199
 200         if (!sim && !aka) {
 201                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 202                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 203                 return 0;
 204         }
 205
 206         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 207                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 208         if (sim && aka)
 209                 type = SCARD_TRY_BOTH;
 210         else if (aka)
 211                 type = SCARD_USIM_ONLY;
 212         else
 213                 type = SCARD_GSM_SIM_ONLY;
 214
 215         wpa_s->scard = scard_init(type);
 216         if (wpa_s->scard == NULL) {
 217                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 218                            "(pcsc-lite)");
 219                 return -1;
 220         }
 221         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 222         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 223
 224         return 0;
 225 }
 226
 227
 228 static int wpa_supplicant_match_privacy(struct wpa_scan_result *bss,
 229                                         struct wpa_ssid *ssid)
 230 {
 231         int i, privacy = 0;
 232
 233         for (i = 0; i < NUM_WEP_KEYS; i++) {
 234                 if (ssid->wep_key_len[i]) {
 235                         privacy = 1;
 236                         break;
 237                 }
 238         }
 239         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 240             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 241                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 242                 privacy = 1;
 243
 244         if (bss->caps & IEEE80211_CAP_PRIVACY)
 245                 return privacy;
 246         return !privacy;
 247 }
 248
 249
 250 static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid,
 251                                          struct wpa_scan_result *bss)
 252 {
 253         struct wpa_ie_data ie;
 254         int proto_match = 0;
 255
 256         while ((ssid->proto & WPA_PROTO_RSN) && bss->rsn_ie_len > 0) {
 257                 proto_match++;
 258
 259                 if (wpa_parse_wpa_ie(bss->rsn_ie, bss->rsn_ie_len, &ie)) {
 260                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 261                         break;
 262                 }
 263                 if (!(ie.proto & ssid->proto)) {
 264                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 265                                    "mismatch");
 266                         break;
 267                 }
 268
 269                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 270                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 271                                    "mismatch");
 272                         break;
 273                 }
 274
 275                 if (!(ie.group_cipher & ssid->group_cipher)) {
 276                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 277                                    "mismatch");
 278                         break;
 279                 }
 280
 281                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 282                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 283                                    "mismatch");
 284                         break;
 285                 }
 286
 287                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 288                 return 1;
 289         }
 290
 291         while ((ssid->proto & WPA_PROTO_WPA) && bss->wpa_ie_len > 0) {
 292                 proto_match++;
 293
 294                 if (wpa_parse_wpa_ie(bss->wpa_ie, bss->wpa_ie_len, &ie)) {
 295                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 296                         break;
 297                 }
 298                 if (!(ie.proto & ssid->proto)) {
 299                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 300                                    "mismatch");
 301                         break;
 302                 }
 303
 304                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 305                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 306                                    "mismatch");
 307                         break;
 308                 }
 309
 310                 if (!(ie.group_cipher & ssid->group_cipher)) {
 311                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 312                                    "mismatch");
 313                         break;
 314                 }
 315
 316                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 317                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 318                                    "mismatch");
 319                         break;
 320                 }
 321
 322                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 323                 return 1;
 324         }
 325
 326         if (proto_match == 0)
 327                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 328
 329         return 0;
 330 }
 331
 332
 333 static struct wpa_scan_result *
 334 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 335                           struct wpa_scan_result *results, int num,
 336                           struct wpa_ssid **selected_ssid)
 337 {
 338         struct wpa_ssid *ssid;
 339         struct wpa_scan_result *bss, *selected = NULL;
 340         int i;
 341         struct wpa_blacklist *e;
 342
 343         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 344                    group->priority);
 345
 346         bss = NULL;
 347         ssid = NULL;
 348         /* First, try to find WPA-enabled AP */
 349         for (i = 0; i < num && !selected; i++) {
 350                 bss = &results[i];
 351                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 352                            "wpa_ie_len=%lu rsn_ie_len=%lu caps=0x%x",
 353                            i, MAC2STR(bss->bssid),
 354                            wpa_ssid_txt(bss->ssid, bss->ssid_len),
 355                            (unsigned long) bss->wpa_ie_len,
 356                            (unsigned long) bss->rsn_ie_len, bss->caps);
 357                 if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) &&
 358                     e->count > 1) {
 359                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 360                         continue;
 361                 }
 362
 363                 if (bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0) {
 364                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 365                         continue;
 366                 }
 367
 368                 for (ssid = group; ssid; ssid = ssid->pnext) {
 369                         if (ssid->disabled)
 370                                 continue;
 371                         if (bss->ssid_len != ssid->ssid_len ||
 372                             memcmp(bss->ssid, ssid->ssid,
 373                                    bss->ssid_len) != 0) {
 374                                 wpa_printf(MSG_DEBUG, "   skip - "
 375                                            "SSID mismatch");
 376                                 continue;
 377                         }
 378                         if (ssid->bssid_set &&
 379                             memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
 380                                 wpa_printf(MSG_DEBUG, "   skip - "
 381                                            "BSSID mismatch");
 382                                 continue;
 383                         }
 384                         if (wpa_supplicant_ssid_bss_match(ssid, bss)) {
 385                                 selected = bss;
 386                                 *selected_ssid = ssid;
 387                                 break;
 388                         }
 389                 }
 390         }
 391
 392         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 393          * allows this. */
 394         for (i = 0; i < num && !selected; i++) {
 395                 bss = &results[i];
 396                 if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) &&
 397                     e->count > 1) {
 398                         continue;
 399                 }
 400                 for (ssid = group; ssid; ssid = ssid->pnext) {
 401                         if (!ssid->disabled &&
 402                             (ssid->ssid_len == 0 ||
 403                              (bss->ssid_len == ssid->ssid_len &&
 404                               memcmp(bss->ssid, ssid->ssid, bss->ssid_len) ==
 405                               0)) &&
 406                             (!ssid->bssid_set ||
 407                              memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0) &&
 408                             ((ssid->key_mgmt & WPA_KEY_MGMT_NONE) ||
 409                              (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 410                             && bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0 &&
 411                             wpa_supplicant_match_privacy(bss, ssid) &&
 412                             !(bss->caps & IEEE80211_CAP_IBSS))
 413                         {
 414                                 selected = bss;
 415                                 *selected_ssid = ssid;
 416                                 wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 417                                            MACSTR " ssid='%s'",
 418                                            MAC2STR(bss->bssid),
 419                                            wpa_ssid_txt(bss->ssid,
 420                                                         bss->ssid_len));
 421                                 break;
 422                         }
 423                 }
 424         }
 425
 426         return selected;
 427 }
 428
 429
 430 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 431 {
 432         int num, prio;
 433         struct wpa_scan_result *selected = NULL;
 434         struct wpa_ssid *ssid = NULL;
 435         struct wpa_scan_result *results;
 436
 437         if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 438                 if (wpa_s->conf->ap_scan == 2)
 439                         return;
 440                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 441                            "scanning again");
 442                 wpa_supplicant_req_scan(wpa_s, 1, 0);
 443                 return;
 444         }
 445         if (wpa_s->conf->ap_scan == 2)
 446                 return;
 447         results = wpa_s->scan_results;
 448         num = wpa_s->num_scan_results;
 449
 450         while (selected == NULL) {
 451                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 452                         selected = wpa_supplicant_select_bss(
 453                                 wpa_s, wpa_s->conf->pssid[prio], results, num,
 454                                 &ssid);
 455                         if (selected)
 456                                 break;
 457                 }
 458
 459                 if (selected == NULL && wpa_s->blacklist) {
 460                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 461                                    "and try again");
 462                         wpa_blacklist_clear(wpa_s);
 463                 } else if (selected == NULL) {
 464                         break;
 465                 }
 466         }
 467
 468         if (selected) {
 469                 if (wpa_s->reassociate ||
 470                     memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0) {
 471                         if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 472                                 wpa_supplicant_req_scan(wpa_s, 10, 0);
 473                                 return;
 474                         }
 475                         wpa_supplicant_associate(wpa_s, selected, ssid);
 476                 } else {
 477                         wpa_printf(MSG_DEBUG, "Already associated with the "
 478                                    "selected AP.");
 479                 }
 480                 rsn_preauth_scan_results(wpa_s->wpa, results, num);
 481         } else {
 482                 wpa_printf(MSG_DEBUG, "No suitable AP found.");
 483                 wpa_supplicant_req_scan(wpa_s, 5, 0);
 484         }
 485 }
 486
 487
 488 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 489                                            union wpa_event_data *data)
 490 {
 491         int l, len, found = 0, wpa_found, rsn_found;
 492         u8 *p;
 493
 494         wpa_printf(MSG_DEBUG, "Association info event");
 495         if (data->assoc_info.req_ies)
 496                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 497                             data->assoc_info.req_ies_len);
 498         if (data->assoc_info.resp_ies)
 499                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 500                             data->assoc_info.resp_ies_len);
 501         if (data->assoc_info.beacon_ies)
 502                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 503                             data->assoc_info.beacon_ies,
 504                             data->assoc_info.beacon_ies_len);
 505
 506         p = data->assoc_info.req_ies;
 507         l = data->assoc_info.req_ies_len;
 508
 509         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 510         while (p && l >= 2) {
 511                 len = p[1] + 2;
 512                 if (len > l) {
 513                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 514                                     p, l);
 515                         break;
 516                 }
 517                 if ((p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
 518                      (memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 519                     (p[0] == RSN_INFO_ELEM && p[1] >= 2)) {
 520                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 521                                 break;
 522                         found = 1;
 523                         wpa_find_assoc_pmkid(wpa_s);
 524                         break;
 525                 }
 526                 l -= len;
 527                 p += len;
 528         }
 529         if (!found && data->assoc_info.req_ies)
 530                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 531
 532         /* WPA/RSN IE from Beacon/ProbeResp */
 533         p = data->assoc_info.beacon_ies;
 534         l = data->assoc_info.beacon_ies_len;
 535
 536         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 537          */
 538         wpa_found = rsn_found = 0;
 539         while (p && l >= 2) {
 540                 len = p[1] + 2;
 541                 if (len > l) {
 542                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 543                                     p, l);
 544                         break;
 545                 }
 546                 if (!wpa_found &&
 547                     p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
 548                     memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 549                         wpa_found = 1;
 550                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 551                 }
 552
 553                 if (!rsn_found &&
 554                     p[0] == RSN_INFO_ELEM && p[1] >= 2) {
 555                         rsn_found = 1;
 556                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 557                 }
 558
 559                 l -= len;
 560                 p += len;
 561         }
 562
 563         if (!wpa_found && data->assoc_info.beacon_ies)
 564                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 565         if (!rsn_found && data->assoc_info.beacon_ies)
 566                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 567 }
 568
 569
 570 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 571                                        union wpa_event_data *data)
 572 {
 573         u8 bssid[ETH_ALEN];
 574
 575         if (data)
 576                 wpa_supplicant_event_associnfo(wpa_s, data);
 577
 578         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 579         if (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
 580             memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) {
 581                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
 582                         MACSTR, MAC2STR(bssid));
 583                 memcpy(wpa_s->bssid, bssid, ETH_ALEN);
 584                 if (wpa_supplicant_dynamic_keys(wpa_s)) {
 585                         wpa_clear_keys(wpa_s, bssid);
 586                 }
 587                 if (wpa_supplicant_select_config(wpa_s) < 0) {
 588                         wpa_supplicant_disassociate(wpa_s,
 589                                                     REASON_DEAUTH_LEAVING);
 590                         return;
 591                 }
 592         }
 593
 594         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
 595         if (wpa_s->current_ssid) {
 596                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
 597                  * initialized before association, but for other modes,
 598                  * initialize PC/SC here, if the current configuration needs
 599                  * smartcard or SIM/USIM. */
 600                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
 601         }
 602         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
 603         l2_packet_notify_auth_start(wpa_s->l2);
 604
 605         /*
 606          * Set portEnabled first to FALSE in order to get EAP state machine out
 607          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
 608          * state machine may transit to AUTHENTICATING state based on obsolete
 609          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
 610          * AUTHENTICATED without ever giving chance to EAP state machine to
 611          * reset the state.
 612          */
 613         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 614         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 615         if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
 616                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 617         /* 802.1X::portControl = Auto */
 618         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
 619         wpa_s->eapol_received = 0;
 620         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 621             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 622                 wpa_supplicant_cancel_auth_timeout(wpa_s);
 623                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 624         } else {
 625                 /* Timeout for receiving the first EAPOL packet */
 626                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
 627         }
 628 }
 629
 630
 631 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
 632 {
 633         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 634                 /*
 635                  * At least Host AP driver and a Prism3 card seemed to be
 636                  * generating streams of disconnected events when configuring
 637                  * IBSS for WPA-None. Ignore them for now.
 638                  */
 639                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
 640                            "IBSS/WPA-None mode");
 641                 return;
 642         }
 643
 644         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
 645             wpa_s->key_mgmt == WPA_KEY_MGMT_PSK) {
 646                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
 647                         "pre-shared key may be incorrect");
 648         }
 649         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
 650                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
 651         wpa_blacklist_add(wpa_s, wpa_s->bssid);
 652         wpa_sm_notify_disassoc(wpa_s->wpa);
 653         wpa_supplicant_mark_disassoc(wpa_s);
 654         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
 655                 "remove keys");
 656         if (wpa_supplicant_dynamic_keys(wpa_s)) {
 657                 wpa_s->keys_cleared = 0;
 658                 wpa_clear_keys(wpa_s, wpa_s->bssid);
 659         }
 660 }
 661
 662
 663 static void
 664 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
 665                                          union wpa_event_data *data)
 666 {
 667         int pairwise;
 668         time_t now;
 669
 670         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
 671         pairwise = (data && data->michael_mic_failure.unicast);
 672         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
 673         time(&now);
 674         if (wpa_s->last_michael_mic_error &&
 675             now - wpa_s->last_michael_mic_error <= 60) {
 676                 /* initialize countermeasures */
 677                 wpa_s->countermeasures = 1;
 678                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
 679
 680                 /*
 681                  * Need to wait for completion of request frame. We do not get
 682                  * any callback for the message completion, so just wait a
 683                  * short while and hope for the best. */
 684                 usleep(10000);
 685
 686                 wpa_drv_set_countermeasures(wpa_s, 1);
 687                 wpa_supplicant_deauthenticate(wpa_s,
 688                                               REASON_MICHAEL_MIC_FAILURE);
 689                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
 690                                      wpa_s, NULL);
 691                 eloop_register_timeout(60, 0,
 692                                        wpa_supplicant_stop_countermeasures,
 693                                        wpa_s, NULL);
 694                 /* TODO: mark the AP rejected for 60 second. STA is
 695                  * allowed to associate with another AP.. */
 696         }
 697         wpa_s->last_michael_mic_error = now;
 698 }
 699
 700
 701 static void
 702 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
 703                                       union wpa_event_data *data)
 704 {
 705         if (strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
 706                 return;
 707
 708         switch (data->interface_status.ievent) {
 709         case EVENT_INTERFACE_ADDED:
 710                 if (!wpa_s->interface_removed)
 711                         break;
 712                 wpa_s->interface_removed = 0;
 713                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
 714                 if (wpa_supplicant_driver_init(wpa_s, 1) < 0) {
 715                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
 716                                    "after interface was added.");
 717                 }
 718                 break;
 719         case EVENT_INTERFACE_REMOVED:
 720                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
 721                 wpa_s->interface_removed = 1;
 722                 wpa_supplicant_mark_disassoc(wpa_s);
 723                 l2_packet_deinit(wpa_s->l2);
 724                 wpa_s->l2 = NULL;
 725                 break;
 726         }
 727 }
 728
 729
 730 void wpa_supplicant_event(struct wpa_supplicant *wpa_s, wpa_event_type event,
 731                           union wpa_event_data *data)
 732 {
 733         switch (event) {
 734         case EVENT_ASSOC:
 735                 wpa_supplicant_event_assoc(wpa_s, data);
 736                 break;
 737         case EVENT_DISASSOC:
 738                 wpa_supplicant_event_disassoc(wpa_s);
 739                 break;
 740         case EVENT_MICHAEL_MIC_FAILURE:
 741                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
 742                 break;
 743         case EVENT_SCAN_RESULTS:
 744                 wpa_supplicant_event_scan_results(wpa_s);
 745                 break;
 746         case EVENT_ASSOCINFO:
 747                 wpa_supplicant_event_associnfo(wpa_s, data);
 748                 break;
 749         case EVENT_INTERFACE_STATUS:
 750                 wpa_supplicant_event_interface_status(wpa_s, data);
 751                 break;
 752         case EVENT_PMKID_CANDIDATE:
 753                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
 754                 break;
 755         default:
 756                 wpa_printf(MSG_INFO, "Unknown event %d", event);
 757                 break;
 758         }
 759 }