wpa_supplicant/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "eapol_supp/eapol_supp_sm.h"
  19 #include "rsn_supp/wpa.h"
  20 #include "eloop.h"
  21 #include "config.h"
  22 #include "l2_packet/l2_packet.h"
  23 #include "wpa_supplicant_i.h"
  24 #include "driver_i.h"
  25 #include "pcsc_funcs.h"
  26 #include "rsn_supp/preauth.h"
  27 #include "rsn_supp/pmksa_cache.h"
  28 #include "common/wpa_ctrl.h"
  29 #include "eap_peer/eap.h"
  30 #include "notify.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "blacklist.h"
  33 #include "wpas_glue.h"
  34 #include "wps_supplicant.h"
  35 #include "ibss_rsn.h"
  36 #include "sme.h"
  37 #include "bgscan.h"
  38
  39
  40 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  41 {
  42         struct wpa_ssid *ssid, *old_ssid;
  43
  44         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  45                 return 0;
  46
  47         wpa_printf(MSG_DEBUG, "Select network based on association "
  48                    "information");
  49         ssid = wpa_supplicant_get_ssid(wpa_s);
  50         if (ssid == NULL) {
  51                 wpa_printf(MSG_INFO, "No network configuration found for the "
  52                            "current AP");
  53                 return -1;
  54         }
  55
  56         if (ssid->disabled) {
  57                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  58                 return -1;
  59         }
  60
  61         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  62                    "AP");
  63         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  64                               WPA_KEY_MGMT_WPA_NONE |
  65                               WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
  66                               WPA_KEY_MGMT_PSK_SHA256 |
  67                               WPA_KEY_MGMT_IEEE8021X_SHA256)) {
  68                 u8 wpa_ie[80];
  69                 size_t wpa_ie_len = sizeof(wpa_ie);
  70                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  71                                           wpa_ie, &wpa_ie_len);
  72         } else {
  73                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  74         }
  75
  76         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  77                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  78         old_ssid = wpa_s->current_ssid;
  79         wpa_s->current_ssid = ssid;
  80         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  81         wpa_supplicant_initiate_eapol(wpa_s);
  82         if (old_ssid != wpa_s->current_ssid)
  83                 wpas_notify_network_changed(wpa_s);
  84
  85         return 0;
  86 }
  87
  88
  89 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  90                                                 void *sock_ctx)
  91 {
  92         struct wpa_supplicant *wpa_s = eloop_ctx;
  93
  94         if (wpa_s->countermeasures) {
  95                 wpa_s->countermeasures = 0;
  96                 wpa_drv_set_countermeasures(wpa_s, 0);
  97                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
  98                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  99         }
 100 }
 101
 102
 103 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 104 {
 105         int bssid_changed;
 106
 107         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 108         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 109         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 110         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 111         if (bssid_changed)
 112                 wpas_notify_bssid_changed(wpa_s);
 113
 114         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 115         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 116         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 117                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 118         wpa_s->ap_ies_from_associnfo = 0;
 119 }
 120
 121
 122 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 123 {
 124         struct wpa_ie_data ie;
 125         int pmksa_set = -1;
 126         size_t i;
 127
 128         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 129             ie.pmkid == NULL)
 130                 return;
 131
 132         for (i = 0; i < ie.num_pmkid; i++) {
 133                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 134                                                     ie.pmkid + i * PMKID_LEN,
 135                                                     NULL, NULL, 0);
 136                 if (pmksa_set == 0) {
 137                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 138                         break;
 139                 }
 140         }
 141
 142         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 143                    "cache", pmksa_set == 0 ? "" : "not ");
 144 }
 145
 146
 147 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 148                                                  union wpa_event_data *data)
 149 {
 150         if (data == NULL) {
 151                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 152                 return;
 153         }
 154         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 155                    " index=%d preauth=%d",
 156                    MAC2STR(data->pmkid_candidate.bssid),
 157                    data->pmkid_candidate.index,
 158                    data->pmkid_candidate.preauth);
 159
 160         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 161                             data->pmkid_candidate.index,
 162                             data->pmkid_candidate.preauth);
 163 }
 164
 165
 166 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 167 {
 168         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 169             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 170                 return 0;
 171
 172 #ifdef IEEE8021X_EAPOL
 173         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 174             wpa_s->current_ssid &&
 175             !(wpa_s->current_ssid->eapol_flags &
 176               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 177                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 178                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 179                  * plaintext or static WEP keys). */
 180                 return 0;
 181         }
 182 #endif /* IEEE8021X_EAPOL */
 183
 184         return 1;
 185 }
 186
 187
 188 /**
 189  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 190  * @wpa_s: pointer to wpa_supplicant data
 191  * @ssid: Configuration data for the network
 192  * Returns: 0 on success, -1 on failure
 193  *
 194  * This function is called when starting authentication with a network that is
 195  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 196  */
 197 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 198                               struct wpa_ssid *ssid)
 199 {
 200 #ifdef IEEE8021X_EAPOL
 201         int aka = 0, sim = 0, type;
 202
 203         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 204                 return 0;
 205
 206         if (ssid->eap.eap_methods == NULL) {
 207                 sim = 1;
 208                 aka = 1;
 209         } else {
 210                 struct eap_method_type *eap = ssid->eap.eap_methods;
 211                 while (eap->vendor != EAP_VENDOR_IETF ||
 212                        eap->method != EAP_TYPE_NONE) {
 213                         if (eap->vendor == EAP_VENDOR_IETF) {
 214                                 if (eap->method == EAP_TYPE_SIM)
 215                                         sim = 1;
 216                                 else if (eap->method == EAP_TYPE_AKA)
 217                                         aka = 1;
 218                         }
 219                         eap++;
 220                 }
 221         }
 222
 223         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 224                 sim = 0;
 225         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 226                 aka = 0;
 227
 228         if (!sim && !aka) {
 229                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 230                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 231                 return 0;
 232         }
 233
 234         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 235                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 236         if (sim && aka)
 237                 type = SCARD_TRY_BOTH;
 238         else if (aka)
 239                 type = SCARD_USIM_ONLY;
 240         else
 241                 type = SCARD_GSM_SIM_ONLY;
 242
 243         wpa_s->scard = scard_init(type);
 244         if (wpa_s->scard == NULL) {
 245                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 246                            "(pcsc-lite)");
 247                 return -1;
 248         }
 249         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 250         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 251 #endif /* IEEE8021X_EAPOL */
 252
 253         return 0;
 254 }
 255
 256
 257 #ifndef CONFIG_NO_SCAN_PROCESSING
 258 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 259                                         struct wpa_ssid *ssid)
 260 {
 261         int i, privacy = 0;
 262
 263         if (ssid->mixed_cell)
 264                 return 1;
 265
 266 #ifdef CONFIG_WPS
 267         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 268                 return 1;
 269 #endif /* CONFIG_WPS */
 270
 271         for (i = 0; i < NUM_WEP_KEYS; i++) {
 272                 if (ssid->wep_key_len[i]) {
 273                         privacy = 1;
 274                         break;
 275                 }
 276         }
 277 #ifdef IEEE8021X_EAPOL
 278         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 279             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 280                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 281                 privacy = 1;
 282 #endif /* IEEE8021X_EAPOL */
 283
 284         if (bss->caps & IEEE80211_CAP_PRIVACY)
 285                 return privacy;
 286         return !privacy;
 287 }
 288
 289
 290 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
 291                                          struct wpa_ssid *ssid,
 292                                          struct wpa_scan_res *bss)
 293 {
 294         struct wpa_ie_data ie;
 295         int proto_match = 0;
 296         const u8 *rsn_ie, *wpa_ie;
 297         int ret;
 298
 299         ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
 300         if (ret >= 0)
 301                 return ret;
 302
 303         rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 304         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 305                 proto_match++;
 306
 307                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 308                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 309                         break;
 310                 }
 311                 if (!(ie.proto & ssid->proto)) {
 312                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 313                                    "mismatch");
 314                         break;
 315                 }
 316
 317                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 318                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 319                                    "mismatch");
 320                         break;
 321                 }
 322
 323                 if (!(ie.group_cipher & ssid->group_cipher)) {
 324                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 325                                    "mismatch");
 326                         break;
 327                 }
 328
 329                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 330                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 331                                    "mismatch");
 332                         break;
 333                 }
 334
 335 #ifdef CONFIG_IEEE80211W
 336                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 337                     ssid->ieee80211w == IEEE80211W_REQUIRED) {
 338                         wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 339                                    "protection");
 340                         break;
 341                 }
 342 #endif /* CONFIG_IEEE80211W */
 343
 344                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 345                 return 1;
 346         }
 347
 348         wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 349         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 350                 proto_match++;
 351
 352                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 353                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 354                         break;
 355                 }
 356                 if (!(ie.proto & ssid->proto)) {
 357                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 358                                    "mismatch");
 359                         break;
 360                 }
 361
 362                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 363                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 364                                    "mismatch");
 365                         break;
 366                 }
 367
 368                 if (!(ie.group_cipher & ssid->group_cipher)) {
 369                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 370                                    "mismatch");
 371                         break;
 372                 }
 373
 374                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 375                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 376                                    "mismatch");
 377                         break;
 378                 }
 379
 380                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 381                 return 1;
 382         }
 383
 384         if (proto_match == 0)
 385                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 386
 387         return 0;
 388 }
 389
 390
 391 static struct wpa_scan_res *
 392 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
 393                               struct wpa_ssid *group,
 394                               struct wpa_ssid **selected_ssid)
 395 {
 396         struct wpa_ssid *ssid;
 397         struct wpa_scan_res *bss;
 398         size_t i;
 399         struct wpa_blacklist *e;
 400         const u8 *ie;
 401
 402         wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 403         for (i = 0; i < wpa_s->scan_res->num; i++) {
 404                 const u8 *ssid_;
 405                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 406                 bss = wpa_s->scan_res->res[i];
 407
 408                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 409                 ssid_ = ie ? ie + 2 : (u8 *) "";
 410                 ssid_len = ie ? ie[1] : 0;
 411
 412                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 413                 wpa_ie_len = ie ? ie[1] : 0;
 414
 415                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 416                 rsn_ie_len = ie ? ie[1] : 0;
 417
 418                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 419                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 420                            (int) i, MAC2STR(bss->bssid),
 421                            wpa_ssid_txt(ssid_, ssid_len),
 422                            wpa_ie_len, rsn_ie_len, bss->caps);
 423
 424                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 425                 if (e && e->count > 1) {
 426                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 427                         continue;
 428                 }
 429
 430                 if (ssid_len == 0) {
 431                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 432                         continue;
 433                 }
 434
 435                 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
 436                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 437                         continue;
 438                 }
 439
 440                 for (ssid = group; ssid; ssid = ssid->pnext) {
 441                         int check_ssid = 1;
 442
 443                         if (ssid->disabled) {
 444                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 445                                 continue;
 446                         }
 447
 448 #ifdef CONFIG_WPS
 449                         if (ssid->ssid_len == 0 &&
 450                             wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 451                                 check_ssid = 0;
 452 #endif /* CONFIG_WPS */
 453
 454                         if (check_ssid &&
 455                             (ssid_len != ssid->ssid_len ||
 456                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 457                                 wpa_printf(MSG_DEBUG, "   skip - "
 458                                            "SSID mismatch");
 459                                 continue;
 460                         }
 461
 462                         if (ssid->bssid_set &&
 463                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 464                         {
 465                                 wpa_printf(MSG_DEBUG, "   skip - "
 466                                            "BSSID mismatch");
 467                                 continue;
 468                         }
 469
 470                         if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
 471                                 continue;
 472
 473                         wpa_printf(MSG_DEBUG, "   selected WPA AP "
 474                                    MACSTR " ssid='%s'",
 475                                    MAC2STR(bss->bssid),
 476                                    wpa_ssid_txt(ssid_, ssid_len));
 477                         *selected_ssid = ssid;
 478                         return bss;
 479                 }
 480         }
 481
 482         return NULL;
 483 }
 484
 485
 486 static struct wpa_scan_res *
 487 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
 488                                   struct wpa_ssid *group,
 489                                   struct wpa_ssid **selected_ssid)
 490 {
 491         struct wpa_ssid *ssid;
 492         struct wpa_scan_res *bss;
 493         size_t i;
 494         struct wpa_blacklist *e;
 495         const u8 *ie;
 496
 497         wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 498         for (i = 0; i < wpa_s->scan_res->num; i++) {
 499                 const u8 *ssid_;
 500                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 501                 bss = wpa_s->scan_res->res[i];
 502
 503                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 504                 ssid_ = ie ? ie + 2 : (u8 *) "";
 505                 ssid_len = ie ? ie[1] : 0;
 506
 507                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 508                 wpa_ie_len = ie ? ie[1] : 0;
 509
 510                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 511                 rsn_ie_len = ie ? ie[1] : 0;
 512
 513                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 514                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 515                            (int) i, MAC2STR(bss->bssid),
 516                            wpa_ssid_txt(ssid_, ssid_len),
 517                            wpa_ie_len, rsn_ie_len, bss->caps);
 518
 519                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 520                 if (e && e->count > 1) {
 521                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 522                         continue;
 523                 }
 524
 525                 if (ssid_len == 0) {
 526                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 527                         continue;
 528                 }
 529
 530                 for (ssid = group; ssid; ssid = ssid->pnext) {
 531                         int check_ssid = ssid->ssid_len != 0;
 532
 533                         if (ssid->disabled) {
 534                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 535                                 continue;
 536                         }
 537
 538 #ifdef CONFIG_WPS
 539                         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 540                                 /* Only allow wildcard SSID match if an AP
 541                                  * advertises active WPS operation that matches
 542                                  * with our mode. */
 543                                 check_ssid = 1;
 544                                 if (ssid->ssid_len == 0 &&
 545                                     wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
 546                                                               bss))
 547                                         check_ssid = 0;
 548                         }
 549 #endif /* CONFIG_WPS */
 550
 551                         if (check_ssid &&
 552                             (ssid_len != ssid->ssid_len ||
 553                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 554                                 wpa_printf(MSG_DEBUG, "   skip - "
 555                                            "SSID mismatch");
 556                                 continue;
 557                         }
 558
 559                         if (ssid->bssid_set &&
 560                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 561                         {
 562                                 wpa_printf(MSG_DEBUG, "   skip - "
 563                                            "BSSID mismatch");
 564                                 continue;
 565                         }
 566
 567                         if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 568                             !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
 569                             !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 570                         {
 571                                 wpa_printf(MSG_DEBUG, "   skip - "
 572                                            "non-WPA network not allowed");
 573                                 continue;
 574                         }
 575
 576                         if ((ssid->key_mgmt &
 577                              (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 578                               WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
 579                               WPA_KEY_MGMT_IEEE8021X_SHA256 |
 580                               WPA_KEY_MGMT_PSK_SHA256)) &&
 581                             (wpa_ie_len != 0 || rsn_ie_len != 0)) {
 582                                 wpa_printf(MSG_DEBUG, "   skip - "
 583                                            "WPA network");
 584                                 continue;
 585                         }
 586
 587                         if (!wpa_supplicant_match_privacy(bss, ssid)) {
 588                                 wpa_printf(MSG_DEBUG, "   skip - "
 589                                            "privacy mismatch");
 590                                 continue;
 591                         }
 592
 593                         if (bss->caps & IEEE80211_CAP_IBSS) {
 594                                 wpa_printf(MSG_DEBUG, "   skip - "
 595                                            "IBSS (adhoc) network");
 596                                 continue;
 597                         }
 598
 599                         wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 600                                    MACSTR " ssid='%s'",
 601                                    MAC2STR(bss->bssid),
 602                                    wpa_ssid_txt(ssid_, ssid_len));
 603                         *selected_ssid = ssid;
 604                         return bss;
 605                 }
 606         }
 607
 608         return NULL;
 609 }
 610
 611
 612 static struct wpa_scan_res *
 613 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 614                           struct wpa_ssid **selected_ssid)
 615 {
 616         struct wpa_scan_res *selected;
 617
 618         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 619                    group->priority);
 620
 621         /* First, try to find WPA-enabled AP */
 622         selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
 623         if (selected)
 624                 return selected;
 625
 626         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 627          * allows this. */
 628         return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
 629 }
 630
 631
 632 static struct wpa_scan_res *
 633 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 634                             struct wpa_ssid **selected_ssid)
 635 {
 636         struct wpa_scan_res *selected = NULL;
 637         int prio;
 638
 639         while (selected == NULL) {
 640                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 641                         selected = wpa_supplicant_select_bss(
 642                                 wpa_s, wpa_s->conf->pssid[prio],
 643                                 selected_ssid);
 644                         if (selected)
 645                                 break;
 646                 }
 647
 648                 if (selected == NULL && wpa_s->blacklist) {
 649                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 650                                    "and try again");
 651                         wpa_blacklist_clear(wpa_s);
 652                         wpa_s->blacklist_cleared++;
 653                 } else if (selected == NULL)
 654                         break;
 655         }
 656
 657         return selected;
 658 }
 659
 660
 661 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
 662                                         int timeout)
 663 {
 664         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 665                 /*
 666                  * Quick recovery if the initial scan results were not
 667                  * complete when fetched before the first scan request.
 668                  */
 669                 wpa_s->scan_res_tried++;
 670                 timeout = 0;
 671         } else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
 672                 /*
 673                  * No networks are enabled; short-circuit request so
 674                  * we don't wait timeout seconds before transitioning
 675                  * to INACTIVE state.
 676                  */
 677                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
 678                 return;
 679         }
 680         wpa_supplicant_req_scan(wpa_s, timeout, 0);
 681 }
 682
 683
 684 static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 685                                    struct wpa_scan_res *selected,
 686                                    struct wpa_ssid *ssid)
 687 {
 688         if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
 689                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
 690                         "PBC session overlap");
 691                 wpa_supplicant_req_new_scan(wpa_s, 10);
 692                 return;
 693         }
 694
 695         /*
 696          * Do not trigger new association unless the BSSID has changed or if
 697          * reassociation is requested. If we are in process of associating with
 698          * the selected BSSID, do not trigger new attempt.
 699          */
 700         if (wpa_s->reassociate ||
 701             (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 702              (wpa_s->wpa_state != WPA_ASSOCIATING ||
 703               os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
 704               0))) {
 705                 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 706                         wpa_supplicant_req_new_scan(wpa_s, 10);
 707                         return;
 708                 }
 709                 wpa_supplicant_associate(wpa_s, selected, ssid);
 710         } else {
 711                 wpa_printf(MSG_DEBUG, "Already associated with the selected "
 712                            "AP");
 713         }
 714 }
 715
 716
 717 static struct wpa_ssid *
 718 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
 719 {
 720         int prio;
 721         struct wpa_ssid *ssid;
 722
 723         for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 724                 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
 725                 {
 726                         if (ssid->disabled)
 727                                 continue;
 728                         if (ssid->mode == IEEE80211_MODE_IBSS ||
 729                             ssid->mode == IEEE80211_MODE_AP)
 730                                 return ssid;
 731                 }
 732         }
 733         return NULL;
 734 }
 735
 736
 737 static void wpa_supplicant_rsn_preauth_scan_results(
 738         struct wpa_supplicant *wpa_s)
 739 {
 740         int i;
 741
 742         if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
 743                 return;
 744
 745         for (i = wpa_s->scan_res->num - 1; i >= 0; i--) {
 746                 const u8 *ssid, *rsn;
 747                 struct wpa_scan_res *r;
 748
 749                 r = wpa_s->scan_res->res[i];
 750
 751                 ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
 752                 if (ssid == NULL)
 753                         continue;
 754
 755                 rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
 756                 if (rsn == NULL)
 757                         continue;
 758
 759                 rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
 760         }
 761
 762 }
 763
 764
 765 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 766 {
 767         struct wpa_scan_res *selected;
 768         struct wpa_ssid *ssid = NULL;
 769
 770         wpa_supplicant_notify_scanning(wpa_s, 0);
 771
 772         if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 773                 if (wpa_s->conf->ap_scan == 2)
 774                         return;
 775                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 776                            "scanning again");
 777                 wpa_supplicant_req_new_scan(wpa_s, 1);
 778                 return;
 779         }
 780
 781         /*
 782          * Don't post the results if this was the initial cached
 783          * and there were no results.
 784          */
 785         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
 786             wpa_s->scan_res->num == 0) {
 787                 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
 788                         "empty - not posting");
 789         } else {
 790                 wpa_printf(MSG_DEBUG, "New scan results available");
 791                 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
 792                 wpas_notify_scan_results(wpa_s);
 793         }
 794
 795         wpas_notify_scan_done(wpa_s, 1);
 796
 797         if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
 798                 return;
 799
 800         if (wpa_s->disconnected) {
 801                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 802                 return;
 803         }
 804
 805         if (bgscan_notify_scan(wpa_s) == 1)
 806                 return;
 807
 808         wpa_supplicant_rsn_preauth_scan_results(wpa_s);
 809
 810         selected = wpa_supplicant_pick_network(wpa_s, &ssid);
 811         if (selected) {
 812                 wpa_supplicant_connect(wpa_s, selected, ssid);
 813         } else {
 814                 wpa_printf(MSG_DEBUG, "No suitable network found");
 815                 ssid = wpa_supplicant_pick_new_network(wpa_s);
 816                 if (ssid) {
 817                         wpa_printf(MSG_DEBUG, "Setup a new network");
 818                         wpa_supplicant_associate(wpa_s, NULL, ssid);
 819                 } else
 820                         wpa_supplicant_req_new_scan(wpa_s, 5);
 821         }
 822 }
 823 #endif /* CONFIG_NO_SCAN_PROCESSING */
 824
 825
 826 #ifdef CONFIG_IEEE80211R
 827 static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
 828                                     const u8 *ftie, const u8 *mdie)
 829 {
 830         const u8 *mobility_domain = NULL;
 831         const u8 *r0kh_id = NULL;
 832         size_t r0kh_id_len = 0;
 833         const u8 *r1kh_id = NULL;
 834         struct rsn_ftie *hdr;
 835         const u8 *pos, *end;
 836
 837         if (mdie == NULL || ftie == NULL)
 838                 return;
 839
 840         if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
 841                 mobility_domain = mdie + 2;
 842 #ifdef CONFIG_SME
 843                 wpa_s->sme.ft_used = 1;
 844                 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
 845 #endif /* CONFIG_SME */
 846         }
 847         if (ftie[1] >= sizeof(struct rsn_ftie)) {
 848                 end = ftie + 2 + ftie[1];
 849                 hdr = (struct rsn_ftie *) (ftie + 2);
 850                 pos = (const u8 *) (hdr + 1);
 851                 while (pos + 1 < end) {
 852                         if (pos + 2 + pos[1] > end)
 853                                 break;
 854                         if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
 855                             pos[1] == FT_R1KH_ID_LEN)
 856                                 r1kh_id = pos + 2;
 857                         else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
 858                                  pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
 859                                 r0kh_id = pos + 2;
 860                                 r0kh_id_len = pos[1];
 861                         }
 862                         pos += 2 + pos[1];
 863                 }
 864         }
 865         wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
 866                              r0kh_id_len, r1kh_id);
 867 }
 868 #endif /* CONFIG_IEEE80211R */
 869
 870 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 871                                            union wpa_event_data *data)
 872 {
 873         int l, len, found = 0, wpa_found, rsn_found;
 874         const u8 *p;
 875 #ifdef CONFIG_IEEE80211R
 876         const u8 *mdie = NULL, *ftie = NULL;
 877 #endif /* CONFIG_IEEE80211R */
 878
 879         wpa_printf(MSG_DEBUG, "Association info event");
 880         if (data->assoc_info.req_ies)
 881                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 882                             data->assoc_info.req_ies_len);
 883         if (data->assoc_info.resp_ies)
 884                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 885                             data->assoc_info.resp_ies_len);
 886         if (data->assoc_info.beacon_ies)
 887                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 888                             data->assoc_info.beacon_ies,
 889                             data->assoc_info.beacon_ies_len);
 890
 891         p = data->assoc_info.req_ies;
 892         l = data->assoc_info.req_ies_len;
 893
 894         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 895         while (p && l >= 2) {
 896                 len = p[1] + 2;
 897                 if (len > l) {
 898                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 899                                     p, l);
 900                         break;
 901                 }
 902                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 903                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 904                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
 905                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 906                                 break;
 907                         found = 1;
 908                         wpa_find_assoc_pmkid(wpa_s);
 909                         break;
 910                 }
 911                 l -= len;
 912                 p += len;
 913         }
 914         if (!found && data->assoc_info.req_ies)
 915                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 916
 917 #ifdef CONFIG_IEEE80211R
 918         p = data->assoc_info.resp_ies;
 919         l = data->assoc_info.resp_ies_len;
 920
 921         /* Go through the IEs and make a copy of the FT/MD IE, if present. */
 922         while (p && l >= 2) {
 923                 len = p[1] + 2;
 924                 if (len > l) {
 925                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 926                                     p, l);
 927                         break;
 928                 }
 929                 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
 930                         ftie = p;
 931                 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
 932                         mdie = p;
 933                 l -= len;
 934                 p += len;
 935         }
 936
 937         wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
 938 #endif /* CONFIG_IEEE80211R */
 939
 940         /* WPA/RSN IE from Beacon/ProbeResp */
 941         p = data->assoc_info.beacon_ies;
 942         l = data->assoc_info.beacon_ies_len;
 943
 944         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 945          */
 946         wpa_found = rsn_found = 0;
 947         while (p && l >= 2) {
 948                 len = p[1] + 2;
 949                 if (len > l) {
 950                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 951                                     p, l);
 952                         break;
 953                 }
 954                 if (!wpa_found &&
 955                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 956                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 957                         wpa_found = 1;
 958                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 959                 }
 960
 961                 if (!rsn_found &&
 962                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
 963                         rsn_found = 1;
 964                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 965                 }
 966
 967                 l -= len;
 968                 p += len;
 969         }
 970
 971         if (!wpa_found && data->assoc_info.beacon_ies)
 972                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 973         if (!rsn_found && data->assoc_info.beacon_ies)
 974                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 975         if (wpa_found || rsn_found)
 976                 wpa_s->ap_ies_from_associnfo = 1;
 977 }
 978
 979
 980 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 981                                        union wpa_event_data *data)
 982 {
 983         u8 bssid[ETH_ALEN];
 984         int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
 985         int bssid_changed;
 986         struct wpa_driver_capa capa;
 987
 988         if (data)
 989                 wpa_supplicant_event_associnfo(wpa_s, data);
 990
 991         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 992         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
 993                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
 994         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
 995             (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
 996              os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
 997                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
 998                         MACSTR, MAC2STR(bssid));
 999                 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1000                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1001                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1002                 if (bssid_changed)
1003                         wpas_notify_bssid_changed(wpa_s);
1004
1005                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1006                         wpa_clear_keys(wpa_s, bssid);
1007                 }
1008                 if (wpa_supplicant_select_config(wpa_s) < 0) {
1009                         wpa_supplicant_disassociate(
1010                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1011                         return;
1012                 }
1013         }
1014
1015 #ifdef CONFIG_SME
1016         os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1017         wpa_s->sme.prev_bssid_set = 1;
1018 #endif /* CONFIG_SME */
1019
1020         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1021         if (wpa_s->current_ssid) {
1022                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1023                  * initialized before association, but for other modes,
1024                  * initialize PC/SC here, if the current configuration needs
1025                  * smartcard or SIM/USIM. */
1026                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1027         }
1028         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1029         l2_packet_notify_auth_start(wpa_s->l2);
1030
1031         /*
1032          * Set portEnabled first to FALSE in order to get EAP state machine out
1033          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1034          * state machine may transit to AUTHENTICATING state based on obsolete
1035          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1036          * AUTHENTICATED without ever giving chance to EAP state machine to
1037          * reset the state.
1038          */
1039         if (!ft_completed) {
1040                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1041                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1042         }
1043         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1044                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1045         /* 802.1X::portControl = Auto */
1046         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1047         wpa_s->eapol_received = 0;
1048         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1049             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1050             (wpa_s->current_ssid &&
1051              wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1052                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1053                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1054         } else if (!ft_completed) {
1055                 /* Timeout for receiving the first EAPOL packet */
1056                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1057         }
1058         wpa_supplicant_cancel_scan(wpa_s);
1059
1060         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1061             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1062                 /*
1063                  * We are done; the driver will take care of RSN 4-way
1064                  * handshake.
1065                  */
1066                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1067                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1068                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1069                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1070         }
1071
1072         if (wpa_s->pending_eapol_rx) {
1073                 struct os_time now, age;
1074                 os_get_time(&now);
1075                 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1076                 if (age.sec == 0 && age.usec < 100000 &&
1077                     os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1078                     0) {
1079                         wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1080                                    "that was received just before association "
1081                                    "notification");
1082                         wpa_supplicant_rx_eapol(
1083                                 wpa_s, wpa_s->pending_eapol_rx_src,
1084                                 wpabuf_head(wpa_s->pending_eapol_rx),
1085                                 wpabuf_len(wpa_s->pending_eapol_rx));
1086                 }
1087                 wpabuf_free(wpa_s->pending_eapol_rx);
1088                 wpa_s->pending_eapol_rx = NULL;
1089         }
1090
1091 #ifdef CONFIG_BGSCAN
1092         if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1093                 bgscan_deinit(wpa_s);
1094                 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1095                         if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1096                                 wpa_printf(MSG_DEBUG, "Failed to initialize "
1097                                            "bgscan");
1098                                 /*
1099                                  * Live without bgscan; it is only used as a
1100                                  * roaming optimization, so the initial
1101                                  * connection is not affected.
1102                                  */
1103                         } else
1104                                 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1105                 } else
1106                         wpa_s->bgscan_ssid = NULL;
1107         }
1108 #endif /* CONFIG_BGSCAN */
1109
1110         if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1111              wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1112             wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1113             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1114                 /* Set static WEP keys again */
1115                 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1116         }
1117 }
1118
1119
1120 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1121 {
1122         const u8 *bssid;
1123 #ifdef CONFIG_SME
1124         int authenticating;
1125         u8 prev_pending_bssid[ETH_ALEN];
1126
1127         authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1128         os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1129 #endif /* CONFIG_SME */
1130
1131         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1132                 /*
1133                  * At least Host AP driver and a Prism3 card seemed to be
1134                  * generating streams of disconnected events when configuring
1135                  * IBSS for WPA-None. Ignore them for now.
1136                  */
1137                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1138                            "IBSS/WPA-None mode");
1139                 return;
1140         }
1141
1142         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1143             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1144                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1145                         "pre-shared key may be incorrect");
1146         }
1147         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1148                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1149         bssid = wpa_s->bssid;
1150         if (is_zero_ether_addr(bssid))
1151                 bssid = wpa_s->pending_bssid;
1152         wpa_blacklist_add(wpa_s, bssid);
1153         wpa_sm_notify_disassoc(wpa_s->wpa);
1154         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1155                 "remove keys");
1156         if (wpa_supplicant_dynamic_keys(wpa_s)) {
1157                 wpa_s->keys_cleared = 0;
1158                 wpa_clear_keys(wpa_s, wpa_s->bssid);
1159         }
1160         wpa_supplicant_mark_disassoc(wpa_s);
1161         bgscan_deinit(wpa_s);
1162 #ifdef CONFIG_SME
1163         if (authenticating &&
1164             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
1165                 /*
1166                  * mac80211-workaround to force deauth on failed auth cmd,
1167                  * requires us to remain in authenticating state to allow the
1168                  * second authentication attempt to be continued properly.
1169                  */
1170                 wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
1171                            "proceed after disconnection event");
1172                 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1173                 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1174         }
1175 #endif /* CONFIG_SME */
1176 }
1177
1178
1179 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1180 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1181                                                     void *sock_ctx)
1182 {
1183         struct wpa_supplicant *wpa_s = eloop_ctx;
1184
1185         if (!wpa_s->pending_mic_error_report)
1186                 return;
1187
1188         wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1189         wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1190         wpa_s->pending_mic_error_report = 0;
1191 }
1192 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1193
1194
1195 static void
1196 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1197                                          union wpa_event_data *data)
1198 {
1199         int pairwise;
1200         struct os_time t;
1201
1202         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1203         pairwise = (data && data->michael_mic_failure.unicast);
1204         os_get_time(&t);
1205         if ((wpa_s->last_michael_mic_error &&
1206              t.sec - wpa_s->last_michael_mic_error <= 60) ||
1207             wpa_s->pending_mic_error_report) {
1208                 if (wpa_s->pending_mic_error_report) {
1209                         /*
1210                          * Send the pending MIC error report immediately since
1211                          * we are going to start countermeasures and AP better
1212                          * do the same.
1213                          */
1214                         wpa_sm_key_request(wpa_s->wpa, 1,
1215                                            wpa_s->pending_mic_error_pairwise);
1216                 }
1217
1218                 /* Send the new MIC error report immediately since we are going
1219                  * to start countermeasures and AP better do the same.
1220                  */
1221                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1222
1223                 /* initialize countermeasures */
1224                 wpa_s->countermeasures = 1;
1225                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1226
1227                 /*
1228                  * Need to wait for completion of request frame. We do not get
1229                  * any callback for the message completion, so just wait a
1230                  * short while and hope for the best. */
1231                 os_sleep(0, 10000);
1232
1233                 wpa_drv_set_countermeasures(wpa_s, 1);
1234                 wpa_supplicant_deauthenticate(wpa_s,
1235                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
1236                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1237                                      wpa_s, NULL);
1238                 eloop_register_timeout(60, 0,
1239                                        wpa_supplicant_stop_countermeasures,
1240                                        wpa_s, NULL);
1241                 /* TODO: mark the AP rejected for 60 second. STA is
1242                  * allowed to associate with another AP.. */
1243         } else {
1244 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1245                 if (wpa_s->mic_errors_seen) {
1246                         /*
1247                          * Reduce the effectiveness of Michael MIC error
1248                          * reports as a means for attacking against TKIP if
1249                          * more than one MIC failure is noticed with the same
1250                          * PTK. We delay the transmission of the reports by a
1251                          * random time between 0 and 60 seconds in order to
1252                          * force the attacker wait 60 seconds before getting
1253                          * the information on whether a frame resulted in a MIC
1254                          * failure.
1255                          */
1256                         u8 rval[4];
1257                         int sec;
1258
1259                         if (os_get_random(rval, sizeof(rval)) < 0)
1260                                 sec = os_random() % 60;
1261                         else
1262                                 sec = WPA_GET_BE32(rval) % 60;
1263                         wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1264                                    "seconds", sec);
1265                         wpa_s->pending_mic_error_report = 1;
1266                         wpa_s->pending_mic_error_pairwise = pairwise;
1267                         eloop_cancel_timeout(
1268                                 wpa_supplicant_delayed_mic_error_report,
1269                                 wpa_s, NULL);
1270                         eloop_register_timeout(
1271                                 sec, os_random() % 1000000,
1272                                 wpa_supplicant_delayed_mic_error_report,
1273                                 wpa_s, NULL);
1274                 } else {
1275                         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1276                 }
1277 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1278                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1279 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1280         }
1281         wpa_s->last_michael_mic_error = t.sec;
1282         wpa_s->mic_errors_seen++;
1283 }
1284
1285
1286 #ifdef CONFIG_TERMINATE_ONLASTIF
1287 static int any_interfaces(struct wpa_supplicant *head)
1288 {
1289         struct wpa_supplicant *wpa_s;
1290
1291         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1292                 if (!wpa_s->interface_removed)
1293                         return 1;
1294         return 0;
1295 }
1296 #endif /* CONFIG_TERMINATE_ONLASTIF */
1297
1298
1299 static void
1300 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1301                                       union wpa_event_data *data)
1302 {
1303         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1304                 return;
1305
1306         switch (data->interface_status.ievent) {
1307         case EVENT_INTERFACE_ADDED:
1308                 if (!wpa_s->interface_removed)
1309                         break;
1310                 wpa_s->interface_removed = 0;
1311                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1312                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1313                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
1314                                    "after interface was added.");
1315                 }
1316                 break;
1317         case EVENT_INTERFACE_REMOVED:
1318                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1319                 wpa_s->interface_removed = 1;
1320                 wpa_supplicant_mark_disassoc(wpa_s);
1321                 l2_packet_deinit(wpa_s->l2);
1322                 wpa_s->l2 = NULL;
1323 #ifdef CONFIG_TERMINATE_ONLASTIF
1324                 /* check if last interface */
1325                 if (!any_interfaces(wpa_s->global->ifaces))
1326                         eloop_terminate();
1327 #endif /* CONFIG_TERMINATE_ONLASTIF */
1328                 break;
1329         }
1330 }
1331
1332
1333 #ifdef CONFIG_PEERKEY
1334 static void
1335 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1336                               union wpa_event_data *data)
1337 {
1338         if (data == NULL)
1339                 return;
1340         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1341 }
1342 #endif /* CONFIG_PEERKEY */
1343
1344
1345 #ifdef CONFIG_IEEE80211R
1346 static void
1347 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1348                                  union wpa_event_data *data)
1349 {
1350         if (data == NULL)
1351                 return;
1352
1353         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1354                                     data->ft_ies.ies_len,
1355                                     data->ft_ies.ft_action,
1356                                     data->ft_ies.target_ap,
1357                                     data->ft_ies.ric_ies,
1358                                     data->ft_ies.ric_ies_len) < 0) {
1359                 /* TODO: prevent MLME/driver from trying to associate? */
1360         }
1361 }
1362 #endif /* CONFIG_IEEE80211R */
1363
1364
1365 #ifdef CONFIG_IBSS_RSN
1366 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1367                                                 union wpa_event_data *data)
1368 {
1369         if (data == NULL)
1370                 return;
1371         ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1372 }
1373 #endif /* CONFIG_IBSS_RSN */
1374
1375
1376 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1377                           union wpa_event_data *data)
1378 {
1379         struct wpa_supplicant *wpa_s = ctx;
1380
1381         switch (event) {
1382         case EVENT_AUTH:
1383                 sme_event_auth(wpa_s, data);
1384                 break;
1385         case EVENT_ASSOC:
1386                 wpa_supplicant_event_assoc(wpa_s, data);
1387                 break;
1388         case EVENT_DISASSOC:
1389                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1390                         sme_event_disassoc(wpa_s, data);
1391                 /* fall through */
1392         case EVENT_DEAUTH:
1393                 wpa_supplicant_event_disassoc(wpa_s);
1394                 break;
1395         case EVENT_MICHAEL_MIC_FAILURE:
1396                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1397                 break;
1398 #ifndef CONFIG_NO_SCAN_PROCESSING
1399         case EVENT_SCAN_RESULTS:
1400                 wpa_supplicant_event_scan_results(wpa_s);
1401                 break;
1402 #endif /* CONFIG_NO_SCAN_PROCESSING */
1403         case EVENT_ASSOCINFO:
1404                 wpa_supplicant_event_associnfo(wpa_s, data);
1405                 break;
1406         case EVENT_INTERFACE_STATUS:
1407                 wpa_supplicant_event_interface_status(wpa_s, data);
1408                 break;
1409         case EVENT_PMKID_CANDIDATE:
1410                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1411                 break;
1412 #ifdef CONFIG_PEERKEY
1413         case EVENT_STKSTART:
1414                 wpa_supplicant_event_stkstart(wpa_s, data);
1415                 break;
1416 #endif /* CONFIG_PEERKEY */
1417 #ifdef CONFIG_IEEE80211R
1418         case EVENT_FT_RESPONSE:
1419                 wpa_supplicant_event_ft_response(wpa_s, data);
1420                 break;
1421 #endif /* CONFIG_IEEE80211R */
1422 #ifdef CONFIG_IBSS_RSN
1423         case EVENT_IBSS_RSN_START:
1424                 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1425                 break;
1426 #endif /* CONFIG_IBSS_RSN */
1427         case EVENT_ASSOC_REJECT:
1428                 sme_event_assoc_reject(wpa_s, data);
1429                 break;
1430         case EVENT_AUTH_TIMED_OUT:
1431                 sme_event_auth_timed_out(wpa_s, data);
1432                 break;
1433         case EVENT_ASSOC_TIMED_OUT:
1434                 sme_event_assoc_timed_out(wpa_s, data);
1435                 break;
1436         default:
1437                 wpa_printf(MSG_INFO, "Unknown event %d", event);
1438                 break;
1439         }
1440 }