contrib/wpa_supplicant/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2006, 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  * $FreeBSD$
  15  */
  16
  17 #include "includes.h"
  18
  19 #include "common.h"
  20 #include "eapol_sm.h"
  21 #include "wpa.h"
  22 #include "eloop.h"
  23 #include "wpa_supplicant.h"
  24 #include "config.h"
  25 #include "l2_packet.h"
  26 #include "wpa_supplicant_i.h"
  27 #include "pcsc_funcs.h"
  28 #include "preauth.h"
  29 #include "pmksa_cache.h"
  30 #include "wpa_ctrl.h"
  31 #include "eap.h"
  32 #include "ctrl_iface_dbus.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         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  67                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  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 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
  91 {
  92         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
  93         os_memset(wpa_s->bssid, 0, ETH_ALEN);
  94         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
  95         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
  96         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
  97         if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
  98                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
  99 }
 100
 101
 102 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 103 {
 104         struct wpa_ie_data ie;
 105         int i, pmksa_set = -1;
 106
 107         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 108             ie.pmkid == NULL)
 109                 return;
 110
 111         for (i = 0; i < ie.num_pmkid; i++) {
 112                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 113                                                     ie.pmkid + i * PMKID_LEN,
 114                                                     NULL, NULL, 0);
 115                 if (pmksa_set == 0) {
 116                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 117                         break;
 118                 }
 119         }
 120
 121         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 122                    "cache", pmksa_set == 0 ? "" : "not ");
 123 }
 124
 125
 126 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 127                                                  union wpa_event_data *data)
 128 {
 129         if (data == NULL) {
 130                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 131                 return;
 132         }
 133         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 134                    " index=%d preauth=%d",
 135                    MAC2STR(data->pmkid_candidate.bssid),
 136                    data->pmkid_candidate.index,
 137                    data->pmkid_candidate.preauth);
 138
 139         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 140                             data->pmkid_candidate.index,
 141                             data->pmkid_candidate.preauth);
 142 }
 143
 144
 145 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 146 {
 147         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 148             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 149                 return 0;
 150
 151 #ifdef IEEE8021X_EAPOL
 152         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 153             wpa_s->current_ssid &&
 154             !(wpa_s->current_ssid->eapol_flags &
 155               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 156                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 157                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 158                  * plaintext or static WEP keys). */
 159                 return 0;
 160         }
 161 #endif /* IEEE8021X_EAPOL */
 162
 163         return 1;
 164 }
 165
 166
 167 /**
 168  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 169  * @wpa_s: pointer to wpa_supplicant data
 170  * @ssid: Configuration data for the network
 171  * Returns: 0 on success, -1 on failure
 172  *
 173  * This function is called when starting authentication with a network that is
 174  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 175  */
 176 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 177                               struct wpa_ssid *ssid)
 178 {
 179 #ifdef IEEE8021X_EAPOL
 180         int aka = 0, sim = 0, type;
 181
 182         if (ssid->pcsc == NULL || wpa_s->scard != NULL)
 183                 return 0;
 184
 185         if (ssid->eap_methods == NULL) {
 186                 sim = 1;
 187                 aka = 1;
 188         } else {
 189                 struct eap_method_type *eap = ssid->eap_methods;
 190                 while (eap->vendor != EAP_VENDOR_IETF ||
 191                        eap->method != EAP_TYPE_NONE) {
 192                         if (eap->vendor == EAP_VENDOR_IETF) {
 193                                 if (eap->method == EAP_TYPE_SIM)
 194                                         sim = 1;
 195                                 else if (eap->method == EAP_TYPE_AKA)
 196                                         aka = 1;
 197                         }
 198                         eap++;
 199                 }
 200         }
 201
 202         if (eap_sm_get_eap_methods(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 203                 sim = 0;
 204         if (eap_sm_get_eap_methods(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 205                 aka = 0;
 206
 207         if (!sim && !aka) {
 208                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 209                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 210                 return 0;
 211         }
 212
 213         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 214                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 215         if (sim && aka)
 216                 type = SCARD_TRY_BOTH;
 217         else if (aka)
 218                 type = SCARD_USIM_ONLY;
 219         else
 220                 type = SCARD_GSM_SIM_ONLY;
 221
 222         wpa_s->scard = scard_init(type);
 223         if (wpa_s->scard == NULL) {
 224                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 225                            "(pcsc-lite)");
 226                 return -1;
 227         }
 228         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 229         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 230 #endif /* IEEE8021X_EAPOL */
 231
 232         return 0;
 233 }
 234
 235
 236 static int wpa_supplicant_match_privacy(struct wpa_scan_result *bss,
 237                                         struct wpa_ssid *ssid)
 238 {
 239         int i, privacy = 0;
 240
 241         if (ssid->mixed_cell)
 242                 return 1;
 243
 244         for (i = 0; i < NUM_WEP_KEYS; i++) {
 245                 if (ssid->wep_key_len[i]) {
 246                         privacy = 1;
 247                         break;
 248                 }
 249         }
 250 #ifdef IEEE8021X_EAPOL
 251         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 252             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 253                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 254                 privacy = 1;
 255 #endif /* IEEE8021X_EAPOL */
 256
 257         if (bss->caps & IEEE80211_CAP_PRIVACY)
 258                 return privacy;
 259         return !privacy;
 260 }
 261
 262
 263 static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid,
 264                                          struct wpa_scan_result *bss)
 265 {
 266         struct wpa_ie_data ie;
 267         int proto_match = 0;
 268
 269         while ((ssid->proto & WPA_PROTO_RSN) && bss->rsn_ie_len > 0) {
 270                 proto_match++;
 271
 272                 if (wpa_parse_wpa_ie(bss->rsn_ie, bss->rsn_ie_len, &ie)) {
 273                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 274                         break;
 275                 }
 276                 if (!(ie.proto & ssid->proto)) {
 277                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 278                                    "mismatch");
 279                         break;
 280                 }
 281
 282                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 283                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 284                                    "mismatch");
 285                         break;
 286                 }
 287
 288                 if (!(ie.group_cipher & ssid->group_cipher)) {
 289                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 290                                    "mismatch");
 291                         break;
 292                 }
 293
 294                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 295                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 296                                    "mismatch");
 297                         break;
 298                 }
 299
 300 #ifdef CONFIG_IEEE80211W
 301                 if (!(ie.capabilities & WPA_CAPABILITY_MGMT_FRAME_PROTECTION)
 302                     && ssid->ieee80211w == IEEE80211W_REQUIRED) {
 303                         wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 304                                    "protection");
 305                         break;
 306                 }
 307 #endif /* CONFIG_IEEE80211W */
 308
 309                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 310                 return 1;
 311         }
 312
 313         while ((ssid->proto & WPA_PROTO_WPA) && bss->wpa_ie_len > 0) {
 314                 proto_match++;
 315
 316                 if (wpa_parse_wpa_ie(bss->wpa_ie, bss->wpa_ie_len, &ie)) {
 317                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 318                         break;
 319                 }
 320                 if (!(ie.proto & ssid->proto)) {
 321                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 322                                    "mismatch");
 323                         break;
 324                 }
 325
 326                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 327                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 328                                    "mismatch");
 329                         break;
 330                 }
 331
 332                 if (!(ie.group_cipher & ssid->group_cipher)) {
 333                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 334                                    "mismatch");
 335                         break;
 336                 }
 337
 338                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 339                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 340                                    "mismatch");
 341                         break;
 342                 }
 343
 344                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 345                 return 1;
 346         }
 347
 348         if (proto_match == 0)
 349                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 350
 351         return 0;
 352 }
 353
 354
 355 static struct wpa_scan_result *
 356 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 357                           struct wpa_scan_result *results, int num,
 358                           struct wpa_ssid **selected_ssid)
 359 {
 360         struct wpa_ssid *ssid;
 361         struct wpa_scan_result *bss, *selected = NULL;
 362         int i;
 363         struct wpa_blacklist *e;
 364
 365         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 366                    group->priority);
 367
 368         bss = NULL;
 369         ssid = NULL;
 370         /* First, try to find WPA-enabled AP */
 371         wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 372         for (i = 0; i < num && !selected; i++) {
 373                 bss = &results[i];
 374                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 375                            "wpa_ie_len=%lu rsn_ie_len=%lu caps=0x%x",
 376                            i, MAC2STR(bss->bssid),
 377                            wpa_ssid_txt(bss->ssid, bss->ssid_len),
 378                            (unsigned long) bss->wpa_ie_len,
 379                            (unsigned long) bss->rsn_ie_len, bss->caps);
 380                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 381                 if (e && e->count > 1) {
 382                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 383                         continue;
 384                 }
 385
 386                 if (bss->wpa_ie_len == 0 && bss->rsn_ie_len == 0) {
 387                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 388                         continue;
 389                 }
 390
 391                 for (ssid = group; ssid; ssid = ssid->pnext) {
 392                         if (ssid->disabled) {
 393                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 394                                 continue;
 395                         }
 396                         if (bss->ssid_len != ssid->ssid_len ||
 397                             os_memcmp(bss->ssid, ssid->ssid,
 398                                       bss->ssid_len) != 0) {
 399                                 wpa_printf(MSG_DEBUG, "   skip - "
 400                                            "SSID mismatch");
 401                                 continue;
 402                         }
 403                         if (ssid->bssid_set &&
 404                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 405                         {
 406                                 wpa_printf(MSG_DEBUG, "   skip - "
 407                                            "BSSID mismatch");
 408                                 continue;
 409                         }
 410                         if (wpa_supplicant_ssid_bss_match(ssid, bss)) {
 411                                 selected = bss;
 412                                 *selected_ssid = ssid;
 413                                 wpa_printf(MSG_DEBUG, "   selected WPA AP "
 414                                            MACSTR " ssid='%s'",
 415                                            MAC2STR(bss->bssid),
 416                                            wpa_ssid_txt(bss->ssid,
 417                                                         bss->ssid_len));
 418                                 break;
 419                         }
 420                 }
 421         }
 422
 423         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 424          * allows this. */
 425         wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 426         for (i = 0; i < num && !selected; i++) {
 427                 bss = &results[i];
 428                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 429                            "wpa_ie_len=%lu rsn_ie_len=%lu caps=0x%x",
 430                            i, MAC2STR(bss->bssid),
 431                            wpa_ssid_txt(bss->ssid, bss->ssid_len),
 432                            (unsigned long) bss->wpa_ie_len,
 433                            (unsigned long) bss->rsn_ie_len, bss->caps);
 434                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 435                 if (e && e->count > 1) {
 436                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 437                         continue;
 438                 }
 439                 for (ssid = group; ssid; ssid = ssid->pnext) {
 440                         if (ssid->disabled) {
 441                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 442                                 continue;
 443                         }
 444                         if (bss->ssid_len != ssid->ssid_len ||
 445                             os_memcmp(bss->ssid, ssid->ssid,
 446                                       bss->ssid_len) != 0) {
 447                                 wpa_printf(MSG_DEBUG, "   skip - "
 448                                            "SSID mismatch");
 449                                 continue;
 450                         }
 451
 452                         if (ssid->bssid_set &&
 453                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 454                         {
 455                                 wpa_printf(MSG_DEBUG, "   skip - "
 456                                            "BSSID mismatch");
 457                                 continue;
 458                         }
 459
 460                         if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 461                             !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 462                         {
 463                                 wpa_printf(MSG_DEBUG, "   skip - "
 464                                            "non-WPA network not allowed");
 465                                 continue;
 466                         }
 467
 468                         if ((ssid->key_mgmt &
 469                              (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK)) ||
 470                             bss->wpa_ie_len != 0 || bss->rsn_ie_len != 0) {
 471                                 wpa_printf(MSG_DEBUG, "   skip - "
 472                                            "WPA network");
 473                                 continue;
 474                         }
 475
 476                         if (!wpa_supplicant_match_privacy(bss, ssid)) {
 477                                 wpa_printf(MSG_DEBUG, "   skip - "
 478                                            "privacy mismatch");
 479                                 continue;
 480                         }
 481
 482                         if (bss->caps & IEEE80211_CAP_IBSS) {
 483                                 wpa_printf(MSG_DEBUG, "   skip - "
 484                                            "IBSS (adhoc) network");
 485                                 continue;
 486                         }
 487
 488                         selected = bss;
 489                         *selected_ssid = ssid;
 490                         wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 491                                    MACSTR " ssid='%s'",
 492                                    MAC2STR(bss->bssid),
 493                                    wpa_ssid_txt(bss->ssid, bss->ssid_len));
 494                         break;
 495                 }
 496         }
 497
 498         return selected;
 499 }
 500
 501
 502 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 503 {
 504         int num, prio, timeout;
 505         struct wpa_scan_result *selected = NULL;
 506         struct wpa_ssid *ssid = NULL;
 507         struct wpa_scan_result *results;
 508
 509         if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 510                 if (wpa_s->conf->ap_scan == 2)
 511                         return;
 512                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 513                            "scanning again");
 514                 timeout = 1;
 515                 goto req_scan;
 516         }
 517
 518         wpa_supplicant_dbus_notify_scan_results(wpa_s);
 519
 520         if (wpa_s->conf->ap_scan == 2)
 521                 return;
 522         results = wpa_s->scan_results;
 523         num = wpa_s->num_scan_results;
 524
 525         while (selected == NULL) {
 526                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 527                         selected = wpa_supplicant_select_bss(
 528                                 wpa_s, wpa_s->conf->pssid[prio], results, num,
 529                                 &ssid);
 530                         if (selected)
 531                                 break;
 532                 }
 533
 534                 if (selected == NULL && wpa_s->blacklist) {
 535                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 536                                    "and try again");
 537                         wpa_blacklist_clear(wpa_s);
 538                 } else if (selected == NULL) {
 539                         break;
 540                 }
 541         }
 542
 543         if (selected) {
 544                 /* Do not trigger new association unless the BSSID has changed
 545                  * or if reassociation is requested. If we are in process of
 546                  * associating with the selected BSSID, do not trigger new
 547                  * attempt. */
 548                 if (wpa_s->reassociate ||
 549                     (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 550                      (wpa_s->wpa_state != WPA_ASSOCIATING ||
 551                       os_memcmp(selected->bssid, wpa_s->pending_bssid,
 552                                 ETH_ALEN) != 0))) {
 553                         if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 554                                 wpa_supplicant_req_scan(wpa_s, 10, 0);
 555                                 return;
 556                         }
 557                         wpa_supplicant_associate(wpa_s, selected, ssid);
 558                 } else {
 559                         wpa_printf(MSG_DEBUG, "Already associated with the "
 560                                    "selected AP.");
 561                 }
 562                 rsn_preauth_scan_results(wpa_s->wpa, results, num);
 563         } else {
 564                 wpa_printf(MSG_DEBUG, "No suitable AP found.");
 565                 timeout = 5;
 566                 goto req_scan;
 567         }
 568
 569         return;
 570
 571 req_scan:
 572         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 573                 /*
 574                  * Quick recovery if the initial scan results were not
 575                  * complete when fetched before the first scan request.
 576                  */
 577                 wpa_s->scan_res_tried++;
 578                 timeout = 0;
 579         }
 580         wpa_supplicant_req_scan(wpa_s, timeout, 0);
 581 }
 582
 583
 584 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 585                                            union wpa_event_data *data)
 586 {
 587         int l, len, found = 0, wpa_found, rsn_found;
 588         u8 *p;
 589
 590         wpa_printf(MSG_DEBUG, "Association info event");
 591         if (data->assoc_info.req_ies)
 592                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 593                             data->assoc_info.req_ies_len);
 594         if (data->assoc_info.resp_ies)
 595                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 596                             data->assoc_info.resp_ies_len);
 597         if (data->assoc_info.beacon_ies)
 598                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 599                             data->assoc_info.beacon_ies,
 600                             data->assoc_info.beacon_ies_len);
 601
 602         p = data->assoc_info.req_ies;
 603         l = data->assoc_info.req_ies_len;
 604
 605         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 606         while (p && l >= 2) {
 607                 len = p[1] + 2;
 608                 if (len > l) {
 609                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 610                                     p, l);
 611                         break;
 612                 }
 613                 if ((p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
 614                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 615                     (p[0] == RSN_INFO_ELEM && p[1] >= 2)) {
 616                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 617                                 break;
 618                         found = 1;
 619                         wpa_find_assoc_pmkid(wpa_s);
 620                         break;
 621                 }
 622                 l -= len;
 623                 p += len;
 624         }
 625         if (!found && data->assoc_info.req_ies)
 626                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 627
 628         /* WPA/RSN IE from Beacon/ProbeResp */
 629         p = data->assoc_info.beacon_ies;
 630         l = data->assoc_info.beacon_ies_len;
 631
 632         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 633          */
 634         wpa_found = rsn_found = 0;
 635         while (p && l >= 2) {
 636                 len = p[1] + 2;
 637                 if (len > l) {
 638                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 639                                     p, l);
 640                         break;
 641                 }
 642                 if (!wpa_found &&
 643                     p[0] == GENERIC_INFO_ELEM && p[1] >= 6 &&
 644                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 645                         wpa_found = 1;
 646                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 647                 }
 648
 649                 if (!rsn_found &&
 650                     p[0] == RSN_INFO_ELEM && p[1] >= 2) {
 651                         rsn_found = 1;
 652                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 653                 }
 654
 655                 l -= len;
 656                 p += len;
 657         }
 658
 659         if (!wpa_found && data->assoc_info.beacon_ies)
 660                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 661         if (!rsn_found && data->assoc_info.beacon_ies)
 662                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 663 }
 664
 665
 666 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 667                                        union wpa_event_data *data)
 668 {
 669         u8 bssid[ETH_ALEN];
 670
 671         if (data)
 672                 wpa_supplicant_event_associnfo(wpa_s, data);
 673
 674         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 675         if (wpa_s->use_client_mlme)
 676                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
 677         if (wpa_s->use_client_mlme ||
 678             (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
 679              os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
 680                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
 681                         MACSTR, MAC2STR(bssid));
 682                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
 683                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 684                 if (wpa_supplicant_dynamic_keys(wpa_s)) {
 685                         wpa_clear_keys(wpa_s, bssid);
 686                 }
 687                 if (wpa_supplicant_select_config(wpa_s) < 0) {
 688                         wpa_supplicant_disassociate(wpa_s,
 689                                                     REASON_DEAUTH_LEAVING);
 690                         return;
 691                 }
 692         }
 693
 694         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
 695         if (wpa_s->current_ssid) {
 696                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
 697                  * initialized before association, but for other modes,
 698                  * initialize PC/SC here, if the current configuration needs
 699                  * smartcard or SIM/USIM. */
 700                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
 701         }
 702         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
 703         l2_packet_notify_auth_start(wpa_s->l2);
 704
 705         /*
 706          * Set portEnabled first to FALSE in order to get EAP state machine out
 707          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
 708          * state machine may transit to AUTHENTICATING state based on obsolete
 709          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
 710          * AUTHENTICATED without ever giving chance to EAP state machine to
 711          * reset the state.
 712          */
 713         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 714         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 715         if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK)
 716                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 717         /* 802.1X::portControl = Auto */
 718         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
 719         wpa_s->eapol_received = 0;
 720         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 721             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 722                 wpa_supplicant_cancel_auth_timeout(wpa_s);
 723                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 724         } else {
 725                 /* Timeout for receiving the first EAPOL packet */
 726                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
 727         }
 728         wpa_supplicant_cancel_scan(wpa_s);
 729 }
 730
 731
 732 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
 733 {
 734         const u8 *bssid;
 735
 736         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 737                 /*
 738                  * At least Host AP driver and a Prism3 card seemed to be
 739                  * generating streams of disconnected events when configuring
 740                  * IBSS for WPA-None. Ignore them for now.
 741                  */
 742                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
 743                            "IBSS/WPA-None mode");
 744                 return;
 745         }
 746
 747         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
 748             wpa_s->key_mgmt == WPA_KEY_MGMT_PSK) {
 749                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
 750                         "pre-shared key may be incorrect");
 751         }
 752         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
 753                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
 754         bssid = wpa_s->bssid;
 755         if (os_memcmp(bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0)
 756                 bssid = wpa_s->pending_bssid;
 757         wpa_blacklist_add(wpa_s, bssid);
 758         wpa_sm_notify_disassoc(wpa_s->wpa);
 759         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
 760                 "remove keys");
 761         if (wpa_supplicant_dynamic_keys(wpa_s)) {
 762                 wpa_s->keys_cleared = 0;
 763                 wpa_clear_keys(wpa_s, wpa_s->bssid);
 764         }
 765         wpa_supplicant_mark_disassoc(wpa_s);
 766 }
 767
 768
 769 static void
 770 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
 771                                          union wpa_event_data *data)
 772 {
 773         int pairwise;
 774         struct os_time t;
 775
 776         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
 777         pairwise = (data && data->michael_mic_failure.unicast);
 778         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
 779         os_get_time(&t);
 780         if (wpa_s->last_michael_mic_error &&
 781             t.sec - wpa_s->last_michael_mic_error <= 60) {
 782                 /* initialize countermeasures */
 783                 wpa_s->countermeasures = 1;
 784                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
 785
 786                 /*
 787                  * Need to wait for completion of request frame. We do not get
 788                  * any callback for the message completion, so just wait a
 789                  * short while and hope for the best. */
 790                 os_sleep(0, 10000);
 791
 792                 wpa_drv_set_countermeasures(wpa_s, 1);
 793                 wpa_supplicant_deauthenticate(wpa_s,
 794                                               REASON_MICHAEL_MIC_FAILURE);
 795                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
 796                                      wpa_s, NULL);
 797                 eloop_register_timeout(60, 0,
 798                                        wpa_supplicant_stop_countermeasures,
 799                                        wpa_s, NULL);
 800                 /* TODO: mark the AP rejected for 60 second. STA is
 801                  * allowed to associate with another AP.. */
 802         }
 803         wpa_s->last_michael_mic_error = t.sec;
 804 }
 805
 806
 807 #ifdef CONFIG_TERMINATE_ONLASTIF
 808 static int any_interfaces(struct wpa_supplicant *head)
 809 {
 810         struct wpa_supplicant *wpa_s;
 811
 812         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
 813                 if (!wpa_s->interface_removed)
 814                         return 1;
 815         return 0;
 816 }
 817 #endif /* CONFIG_TERMINATE_ONLASTIF */
 818
 819 static void
 820 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
 821                                       union wpa_event_data *data)
 822 {
 823         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
 824                 return;
 825
 826         switch (data->interface_status.ievent) {
 827         case EVENT_INTERFACE_ADDED:
 828                 if (!wpa_s->interface_removed)
 829                         break;
 830                 wpa_s->interface_removed = 0;
 831                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
 832                 if (wpa_supplicant_driver_init(wpa_s, 1) < 0) {
 833                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
 834                                    "after interface was added.");
 835                 }
 836                 break;
 837         case EVENT_INTERFACE_REMOVED:
 838                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
 839                 wpa_s->interface_removed = 1;
 840                 wpa_supplicant_mark_disassoc(wpa_s);
 841                 l2_packet_deinit(wpa_s->l2);
 842                 wpa_s->l2 = NULL;
 843 #ifdef CONFIG_TERMINATE_ONLASTIF
 844                 /* check if last interface */
 845                 if (!any_interfaces(wpa_s->global->ifaces))
 846                         eloop_terminate();
 847 #endif /* CONFIG_TERMINATE_ONLASTIF */
 848                 break;
 849         }
 850 }
 851
 852
 853 #ifdef CONFIG_PEERKEY
 854 static void
 855 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
 856                               union wpa_event_data *data)
 857 {
 858         if (data == NULL)
 859                 return;
 860         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
 861 }
 862 #endif /* CONFIG_PEERKEY */
 863
 864
 865 void wpa_supplicant_event(struct wpa_supplicant *wpa_s, wpa_event_type event,
 866                           union wpa_event_data *data)
 867 {
 868         switch (event) {
 869         case EVENT_ASSOC:
 870                 wpa_supplicant_event_assoc(wpa_s, data);
 871                 break;
 872         case EVENT_DISASSOC:
 873                 wpa_supplicant_event_disassoc(wpa_s);
 874                 break;
 875         case EVENT_MICHAEL_MIC_FAILURE:
 876                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
 877                 break;
 878         case EVENT_SCAN_RESULTS:
 879                 wpa_supplicant_event_scan_results(wpa_s);
 880                 break;
 881         case EVENT_ASSOCINFO:
 882                 wpa_supplicant_event_associnfo(wpa_s, data);
 883                 break;
 884         case EVENT_INTERFACE_STATUS:
 885                 wpa_supplicant_event_interface_status(wpa_s, data);
 886                 break;
 887         case EVENT_PMKID_CANDIDATE:
 888                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
 889                 break;
 890 #ifdef CONFIG_PEERKEY
 891         case EVENT_STKSTART:
 892                 wpa_supplicant_event_stkstart(wpa_s, data);
 893                 break;
 894 #endif /* CONFIG_PEERKEY */
 895         default:
 896                 wpa_printf(MSG_INFO, "Unknown event %d", event);
 897                 break;
 898         }
 899 }