contrib/wpa_supplicant/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  * $FreeBSD$
  15  */
  16
  17 #include <stdlib.h>
  18 #include <stdio.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21 #include <time.h>
  22
  23 #include "common.h"
  24 #include "eapol_sm.h"
  25 #include "wpa.h"
  26 #include "eloop.h"
  27 #include "wpa_supplicant.h"
  28 #include "config.h"
  29 #include "l2_packet.h"
  30 #include "wpa_supplicant_i.h"
  31 #include "pcsc_funcs.h"
  32 #include "preauth.h"
  33 #include "wpa_ctrl.h"
  34 #include "eap.h"
  35
  36
  37 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  38 {
  39         struct wpa_ssid *ssid;
  40
  41         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  42                 return 0;
  43
  44         ssid = wpa_supplicant_get_ssid(wpa_s);
  45         if (ssid == NULL) {
  46                 wpa_printf(MSG_INFO, "No network configuration found for the "
  47                            "current AP");
  48                 return -1;
  49         }
  50
  51         if (ssid->disabled) {
  52                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  53                 return -1;
  54         }
  55
  56         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  57                    "AP");
  58         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  59                               WPA_KEY_MGMT_WPA_NONE)) {
  60                 u8 wpa_ie[80];
  61                 size_t wpa_ie_len = sizeof(wpa_ie);
  62                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  63                                           wpa_ie, &wpa_ie_len);
  64         } else {
  65                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  66         }
  67
  68         wpa_s->current_ssid = ssid;
  69         wpa_sm_set_config(wpa_s->wpa, wpa_s->current_ssid);
  70         wpa_supplicant_initiate_eapol(wpa_s);
  71
  72         return 0;
  73 }
  74
  75
  76 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  77                                                 void *sock_ctx)
  78 {
  79         struct wpa_supplicant *wpa_s = eloop_ctx;
  80
  81         if (wpa_s->countermeasures) {
  82                 wpa_s->countermeasures = 0;
  83                 wpa_drv_set_countermeasures(wpa_s, 0);
  84                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
  85                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  86         }
  87 }
  88
  89
  90 static void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
  91 {
  92         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
  93         memset(wpa_s->bssid, 0, ETH_ALEN);
  94         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
  95         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
  96         if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
  97                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
  98 }
  99
 100
 101 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 102 {
 103         struct wpa_ie_data ie;
 104         int i, pmksa_set = -1;
 105
 106         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 107             ie.pmkid == NULL)
 108                 return;
 109
 110         for (i = 0; i < ie.num_pmkid; i++) {
 111                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 112                                                     ie.pmkid + i * PMKID_LEN,
 113                                                     NULL, NULL, 0);
 114                 if (pmksa_set == 0) {
 115                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 116                         break;
 117                 }
 118         }
 119
 120         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 121                    "cache", pmksa_set == 0 ? "" : "not ");
 122 }
 123
 124
 125 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 126                                                  union wpa_event_data *data)
 127 {
 128         if (data == NULL) {
 129                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 130                 return;
 131         }
 132         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 133                    " index=%d preauth=%d",
 134                    MAC2STR(data->pmkid_candidate.bssid),
 135                    data->pmkid_candidate.index,
 136                    data->pmkid_candidate.preauth);
 137
 138         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 139                             data->pmkid_candidate.index,
 140                             data->pmkid_candidate.preauth);
 141 }
 142
 143
 144 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 145 {
 146         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 147             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 148                 return 0;
 149
 150         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 151             wpa_s->current_ssid &&
 152             !(wpa_s->current_ssid->eapol_flags &
 153               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 154                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 155                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 156                  * plaintext or static WEP keys). */
 157                 return 0;
 158         }
 159
 160         return 1;
 161 }
 162
 163
 164 /**
 165  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 166  * @wpa_s: pointer to wpa_supplicant data
 167  * @ssid: Configuration data for the network
 168  * Returns: 0 on success, -1 on failure
 169  *
 170  * This function is called when starting authentication with a network that is
 171  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 172  */
 173 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 174                               struct wpa_ssid *ssid)
 175 {
 176         int aka = 0, sim = 0, type;
 177
 178         if (ssid->pcsc == NULL || wpa_s->scard != NULL)
 179                 return 0;
 180
 181         if (ssid->eap_methods == NULL) {
 182                 sim = 1;
 183                 aka = 1;
 184         } else {
 185                 u8 *eap = ssid->eap_methods;
 186                 while (*eap != EAP_TYPE_NONE) {
 187                         if (*eap == EAP_TYPE_SIM)
 188                                 sim = 1;
 189                         else if (*eap == EAP_TYPE_AKA)
 190                                 aka = 1;
 191                         eap++;
 192                 }
 193         }
 194
 195 #ifndef EAP_SIM
 196         sim = 0;
 197 #endif /* EAP_SIM */
 198 #ifndef EAP_AKA
 199         aka = 0;
 200 #endif /* EAP_AKA */
 201
 202         if (!sim && !aka) {
 203                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 204                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 205                 return 0;
 206         }
 207
 208         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 209                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 210         if (sim && aka)
 211                 type = SCARD_TRY_BOTH;
 212         else if (aka)
 213                 type = SCARD_USIM_ONLY;
 214         else
 215                 type = SCARD_GSM_SIM_ONLY;
 216
 217         wpa_s->scard = scard_init(type);
 218         if (wpa_s->scard == NULL) {
 219                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 220                            "(pcsc-lite)");
 221                 return -1;
 222         }
 223         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 224         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 225
 226         return 0;
 227 }
 228
 229
 230 static int wpa_supplicant_match_privacy(struct wpa_scan_result *bss,
 231                                         struct wpa_ssid *ssid)
 232 {
 233         int i, privacy = 0;
 234
 235         for (i = 0; i < NUM_WEP_KEYS; i++) {
 236                 if (ssid->wep_key_len[i]) {
 237                         privacy = 1;
 238                         break;
 239                 }
 240         }
 241         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 242             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 243                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 244                 privacy = 1;
 245
 246         if (bss->caps & IEEE80211_CAP_PRIVACY)
 247                 return privacy;
 248         return !privacy;
 249 }
 250
 251
 252 static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid,
 253                                          struct wpa_scan_result *bss)
 254 {
 255         struct wpa_ie_data ie;
 256         int proto_match = 0;
 257
 258         while ((ssid->proto & WPA_PROTO_RSN) && bss->rsn_ie_len > 0) {
 259                 proto_match++;
 260
 261                 if (wpa_parse_wpa_ie(bss->rsn_ie, bss->rsn_ie_len, &ie)) {
 262                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 263                         break;
 264                 }
 265                 if (!(ie.proto & ssid->proto)) {
 266                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 267                                    "mismatch");
 268                         break;
 269                 }
 270
 271                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 272                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 273                                    "mismatch");
 274                         break;
 275                 }
 276
 277                 if (!(ie.group_cipher & ssid->group_cipher)) {
 278                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 279                                    "mismatch");
 280                         break;
 281                 }
 282
 283                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 284                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 285                                    "mismatch");
 286                         break;
 287                 }
 288
 289                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 290                 return 1;
 291         }
 292
 293         while ((ssid->proto & WPA_PROTO_WPA) && bss->wpa_ie_len > 0) {
 294                 proto_match++;
 295
 296                 if (wpa_parse_wpa_ie(bss->wpa_ie, bss->wpa_ie_len, &ie)) {
 297                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 298                         break;
 299                 }
 300                 if (!(ie.proto & ssid->proto)) {
 301                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 302                                    "mismatch");
 303                         break;
 304                 }
 305
 306                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 307                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 308                                    "mismatch");
 309                         break;
 310                 }
 311
 312                 if (!(ie.group_cipher & ssid->group_cipher)) {
 313                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 314                                    "mismatch");
 315                         break;
 316                 }
 317
 318                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 319                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 320                                    "mismatch");
 321                         break;
 322                 }
 323
 324                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 325                 return 1;
 326         }
 327
 328         if (proto_match == 0)
 329                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 330
 331         return 0;
 332 }
 333
 334
 335 static struct wpa_scan_result *
 336 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 337                           struct wpa_scan_result *results, int num,
 338                           struct wpa_ssid **selected_ssid)
 339 {
 340         struct wpa_ssid *ssid;
 341         struct wpa_scan_result *bss, *selected = NULL;
 342         int i;
 343         struct wpa_blacklist *e;
 344
 345         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 346                    group->priority);
 347
 348         bss = NULL;
 349         ssid = NULL;
 350         /* First, try to find WPA-enabled AP */
 351         for (i = 0; i < num && !selected; i++) {
 352                 bss = &results[i];
 353                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 354                            "wpa_ie_len=%lu rsn_ie_len=%lu caps=0x%x",
 355                            i, MAC2STR(bss->bssid),
 356                            wpa_ssid_txt(bss->ssid, bss->ssid_len),
 357                            (unsigned long) bss->wpa_ie_len,
 358                            (unsigned long) bss->rsn_ie_len, bss->caps);
 359                 if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) &&
 360                     e->count > 1) {
 361                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 362                         continue;
 363                 }
 364
 365                 if (bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0) {
 366                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 367                         continue;
 368                 }
 369
 370                 for (ssid = group; ssid; ssid = ssid->pnext) {
 371                         if (ssid->disabled)
 372                                 continue;
 373                         if (bss->ssid_len != ssid->ssid_len ||
 374                             memcmp(bss->ssid, ssid->ssid,
 375                                    bss->ssid_len) != 0) {
 376                                 wpa_printf(MSG_DEBUG, "   skip - "
 377                                            "SSID mismatch");
 378                                 continue;
 379                         }
 380                         if (ssid->bssid_set &&
 381                             memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
 382                                 wpa_printf(MSG_DEBUG, "   skip - "
 383                                            "BSSID mismatch");
 384                                 continue;
 385                         }
 386                         if (wpa_supplicant_ssid_bss_match(ssid, bss)) {
 387                                 selected = bss;
 388                                 *selected_ssid = ssid;
 389                                 break;
 390                         }
 391                 }
 392         }
 393
 394         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 395          * allows this. */
 396         for (i = 0; i < num && !selected; i++) {
 397                 bss = &results[i];
 398                 if ((e = wpa_blacklist_get(wpa_s, bss->bssid)) &&
 399                     e->count > 1) {
 400                         continue;
 401                 }
 402                 for (ssid = group; ssid; ssid = ssid->pnext) {
 403                         if (!ssid->disabled &&
 404                             (ssid->ssid_len == 0 ||
 405                              (bss->ssid_len == ssid->ssid_len &&
 406                               memcmp(bss->ssid, ssid->ssid, bss->ssid_len) ==
 407                               0)) &&
 408                             (!ssid->bssid_set ||
 409                              memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0) &&
 410                             ((ssid->key_mgmt & WPA_KEY_MGMT_NONE) ||
 411                              (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 412                             && bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0 &&
 413                             wpa_supplicant_match_privacy(bss, ssid) &&
 414                             !(bss->caps & IEEE80211_CAP_IBSS))
 415                         {
 416                                 selected = bss;
 417                                 *selected_ssid = ssid;
 418                                 wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 419                                            MACSTR " ssid='%s'",
 420                                            MAC2STR(bss->bssid),
 421                                            wpa_ssid_txt(bss->ssid,
 422                                                         bss->ssid_len));
 423                                 break;
 424                         }
 425                 }
 426         }
 427
 428         return selected;
 429 }
 430
 431
 432 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 433 {
 434         int num, prio;
 435         struct wpa_scan_result *selected = NULL;
 436         struct wpa_ssid *ssid = NULL;
 437         struct wpa_scan_result *results;
 438
 439         if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 440                 if (wpa_s->conf->ap_scan == 2)
 441                         return;
 442                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 443                            "scanning again");
 444                 wpa_supplicant_req_scan(wpa_s, 1, 0);
 445                 return;
 446         }
 447         if (wpa_s->conf->ap_scan == 2)
 448                 return;
 449         results = wpa_s->scan_results;
 450         num = wpa_s->num_scan_results;
 451
 452         while (selected == NULL) {
 453                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 454                         selected = wpa_supplicant_select_bss(
 455                                 wpa_s, wpa_s->conf->pssid[prio], results, num,
 456                                 &ssid);
 457                         if (selected)
 458                                 break;
 459                 }
 460
 461                 if (selected == NULL && wpa_s->blacklist) {
 462                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 463                                    "and try again");
 464                         wpa_blacklist_clear(wpa_s);
 465                 } else if (selected == NULL) {
 466                         break;
 467                 }
 468         }
 469
 470         if (selected) {
 471                 if (wpa_s->reassociate ||
 472                     memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0) {
 473                         if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 474                                 wpa_supplicant_req_scan(wpa_s, 10, 0);
 475                                 return;
 476                         }
 477                         wpa_supplicant_associate(wpa_s, selected, ssid);
 478                 } else {
 479                         wpa_printf(MSG_DEBUG, "Already associated with the "
 480                                    "selected AP.");
 481                 }
 482                 rsn_preauth_scan_results(wpa_s->wpa, results, num);
 483         } else {
 484                 wpa_printf(MSG_DEBUG, "No suitable AP found.");
 485                 wpa_supplicant_req_scan(wpa_s, 5, 0);
 486         }
 487 }
 488
 489
 490 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 491                                            union wpa_event_data *data)
 492 {
 493         int l, len, found = 0, wpa_found, rsn_found;
 494         u8 *p;
 495
 496         wpa_printf(MSG_DEBUG, "Association info event");
 497         if (data->assoc_info.req_ies)
 498                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 499                             data->assoc_info.req_ies_len);
 500         if (data->assoc_info.resp_ies)
 501                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 502                             data->assoc_info.resp_ies_len);
 503         if (data->assoc_info.beacon_ies)
 504                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 505                             data->assoc_info.beacon_ies,
 506                             data->assoc_info.beacon_ies_len);
 507
 508         p = data->assoc_info.req_ies;
 509         l = data->assoc_info.req_ies_len;
 510
 511         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 512         while (p && l >= 2) {
 513                 len = p[1] + 2;
 514                 if (len > l) {
 515                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 516                                     p, l);
 517                         break;
 518                 }
 519                 if ((p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
 520                      (memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 521                     (p[0] == RSN_INFO_ELEM && p[1] >= 2)) {
 522                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 523                                 break;
 524                         found = 1;
 525                         wpa_find_assoc_pmkid(wpa_s);
 526                         break;
 527                 }
 528                 l -= len;
 529                 p += len;
 530         }
 531         if (!found && data->assoc_info.req_ies)
 532                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 533
 534         /* WPA/RSN IE from Beacon/ProbeResp */
 535         p = data->assoc_info.beacon_ies;
 536         l = data->assoc_info.beacon_ies_len;
 537
 538         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 539          */
 540         wpa_found = rsn_found = 0;
 541         while (p && l >= 2) {
 542                 len = p[1] + 2;
 543                 if (len > l) {
 544                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 545                                     p, l);
 546                         break;
 547                 }
 548                 if (!wpa_found &&
 549                     p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
 550                     memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 551                         wpa_found = 1;
 552                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 553                 }
 554
 555                 if (!rsn_found &&
 556                     p[0] == RSN_INFO_ELEM && p[1] >= 2) {
 557                         rsn_found = 1;
 558                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 559                 }
 560
 561                 l -= len;
 562                 p += len;
 563         }
 564
 565         if (!wpa_found && data->assoc_info.beacon_ies)
 566                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 567         if (!rsn_found && data->assoc_info.beacon_ies)
 568                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 569 }
 570
 571
 572 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 573                                        union wpa_event_data *data)
 574 {
 575         u8 bssid[ETH_ALEN];
 576
 577         if (data)
 578                 wpa_supplicant_event_associnfo(wpa_s, data);
 579
 580         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 581         if (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
 582             memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) {
 583                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
 584                         MACSTR, MAC2STR(bssid));
 585                 memcpy(wpa_s->bssid, bssid, ETH_ALEN);
 586                 if (wpa_supplicant_dynamic_keys(wpa_s)) {
 587                         wpa_clear_keys(wpa_s, bssid);
 588                 }
 589                 if (wpa_supplicant_select_config(wpa_s) < 0) {
 590                         wpa_supplicant_disassociate(wpa_s,
 591                                                     REASON_DEAUTH_LEAVING);
 592                         return;
 593                 }
 594         }
 595
 596         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
 597         if (wpa_s->current_ssid) {
 598                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
 599                  * initialized before association, but for other modes,
 600                  * initialize PC/SC here, if the current configuration needs
 601                  * smartcard or SIM/USIM. */
 602                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
 603         }
 604         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
 605         l2_packet_notify_auth_start(wpa_s->l2);
 606
 607         /*
 608          * Set portEnabled first to FALSE in order to get EAP state machine out
 609          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
 610          * state machine may transit to AUTHENTICATING state based on obsolete
 611          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
 612          * AUTHENTICATED without ever giving chance to EAP state machine to
 613          * reset the state.
 614          */
 615         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 616         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 617         if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
 618                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 619         /* 802.1X::portControl = Auto */
 620         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
 621         wpa_s->eapol_received = 0;
 622         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 623             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 624                 wpa_supplicant_cancel_auth_timeout(wpa_s);
 625                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 626         } else {
 627                 /* Timeout for receiving the first EAPOL packet */
 628                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
 629         }
 630 }
 631
 632
 633 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
 634 {
 635         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 636                 /*
 637                  * At least Host AP driver and a Prism3 card seemed to be
 638                  * generating streams of disconnected events when configuring
 639                  * IBSS for WPA-None. Ignore them for now.
 640                  */
 641                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
 642                            "IBSS/WPA-None mode");
 643                 return;
 644         }
 645
 646         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
 647             wpa_s->key_mgmt == WPA_KEY_MGMT_PSK) {
 648                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
 649                         "pre-shared key may be incorrect");
 650         }
 651         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
 652                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
 653         wpa_blacklist_add(wpa_s, wpa_s->bssid);
 654         wpa_sm_notify_disassoc(wpa_s->wpa);
 655         wpa_supplicant_mark_disassoc(wpa_s);
 656         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
 657                 "remove keys");
 658         if (wpa_supplicant_dynamic_keys(wpa_s)) {
 659                 wpa_s->keys_cleared = 0;
 660                 wpa_clear_keys(wpa_s, wpa_s->bssid);
 661         }
 662 }
 663
 664
 665 static void
 666 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
 667                                          union wpa_event_data *data)
 668 {
 669         int pairwise;
 670         time_t now;
 671
 672         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
 673         pairwise = (data && data->michael_mic_failure.unicast);
 674         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
 675         time(&now);
 676         if (wpa_s->last_michael_mic_error &&
 677             now - wpa_s->last_michael_mic_error <= 60) {
 678                 /* initialize countermeasures */
 679                 wpa_s->countermeasures = 1;
 680                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
 681
 682                 /*
 683                  * Need to wait for completion of request frame. We do not get
 684                  * any callback for the message completion, so just wait a
 685                  * short while and hope for the best. */
 686                 usleep(10000);
 687
 688                 wpa_drv_set_countermeasures(wpa_s, 1);
 689                 wpa_supplicant_deauthenticate(wpa_s,
 690                                               REASON_MICHAEL_MIC_FAILURE);
 691                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
 692                                      wpa_s, NULL);
 693                 eloop_register_timeout(60, 0,
 694                                        wpa_supplicant_stop_countermeasures,
 695                                        wpa_s, NULL);
 696                 /* TODO: mark the AP rejected for 60 second. STA is
 697                  * allowed to associate with another AP.. */
 698         }
 699         wpa_s->last_michael_mic_error = now;
 700 }
 701
 702
 703 static int any_interfaces(struct wpa_supplicant *head)
 704 {
 705         struct wpa_supplicant *wpa_s;
 706
 707         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
 708                 if (!wpa_s->interface_removed)
 709                         return 1;
 710         return 0;
 711 }
 712
 713 static void
 714 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
 715                                       union wpa_event_data *data)
 716 {
 717         if (strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
 718                 return;
 719
 720         switch (data->interface_status.ievent) {
 721         case EVENT_INTERFACE_ADDED:
 722                 if (!wpa_s->interface_removed)
 723                         break;
 724                 wpa_s->interface_removed = 0;
 725                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
 726                 if (wpa_supplicant_driver_init(wpa_s, 1) < 0) {
 727                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
 728                                    "after interface was added.");
 729                 }
 730                 break;
 731         case EVENT_INTERFACE_REMOVED:
 732                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
 733                 wpa_s->interface_removed = 1;
 734                 wpa_supplicant_mark_disassoc(wpa_s);
 735                 l2_packet_deinit(wpa_s->l2);
 736                 wpa_s->l2 = NULL;
 737                 /* check if last interface */
 738                 if (!any_interfaces(wpa_s->global->ifaces))
 739                         eloop_terminate();
 740                 break;
 741         }
 742 }
 743
 744
 745 void wpa_supplicant_event(struct wpa_supplicant *wpa_s, wpa_event_type event,
 746                           union wpa_event_data *data)
 747 {
 748         switch (event) {
 749         case EVENT_ASSOC:
 750                 wpa_supplicant_event_assoc(wpa_s, data);
 751                 break;
 752         case EVENT_DISASSOC:
 753                 wpa_supplicant_event_disassoc(wpa_s);
 754                 break;
 755         case EVENT_MICHAEL_MIC_FAILURE:
 756                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
 757                 break;
 758         case EVENT_SCAN_RESULTS:
 759                 wpa_supplicant_event_scan_results(wpa_s);
 760                 break;
 761         case EVENT_ASSOCINFO:
 762                 wpa_supplicant_event_associnfo(wpa_s, data);
 763                 break;
 764         case EVENT_INTERFACE_STATUS:
 765                 wpa_supplicant_event_interface_status(wpa_s, data);
 766                 break;
 767         case EVENT_PMKID_CANDIDATE:
 768                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
 769                 break;
 770         default:
 771                 wpa_printf(MSG_INFO, "Unknown event %d", event);
 772                 break;
 773         }
 774 }